NORTHWEST AIRLINES CORP
8-K, 1999-08-10
AIR TRANSPORTATION, SCHEDULED
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

                  Date of earliest event reported June 3, 1999

                         NORTHWEST AIRLINES CORPORATION
- --------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)

                                    Delaware
- --------------------------------------------------------------------------------
                            (State of Incorporation)

                                   95-4205287
- --------------------------------------------------------------------------------
                      (I.R.S. Employer Identification No.)

                                    0-23642
- --------------------------------------------------------------------------------
                            (Commission File Number)

                 2700 Lone Oak Parkway, Eagan, Minnesota 55121
- --------------------------------------------------------------------------------
                    (Address of principal executive offices)

                                 (612) 726-2111
- --------------------------------------------------------------------------------
                        (Registrant's telephone number)
<PAGE>

Item 7 Exhibits.

The documents listed below are filed as Exhibits with reference to the
Registration Statement on Form S-3 (Registration No. 333-79215) (the
"Registration Statement") of Northwest Airlines Corporation and Northwest
Airlines, Inc. The Registration Statement, the Preliminary Prospectus
Supplement, dated June 15, 1999 (filed with the Securities Exchange Commission
pursuant to Rule 424(b)(2) on June 15, 1999), filed and the Prospectus
Supplement, dated June 18, 1999 (filed with the Securities Exchange Commission
pursuant to Rule 424(b)(2) on June 22, 1999), to the Prospectus, dated June 7,
1999, relate to the offering of Northwest Airlines, Inc.'s Pass Through
Certificates, Series 1999-2.

1(a)        Underwriting Agreement, dated as of June 18, 1999, by and among
            Northwest Airlines, Inc., Northwest Airlines Corporation, Salomon
            Smith Barney Inc., Credit Suisse First Boston Corporation, ABN AMRO
            Incorporated, Credit Lyonnais Securities (USA) Inc. and Deutsche
            Bank Securities Inc.

4(a)        Pass Through Trust Agreement, dated as of June 3, 1999, by and among
            Northwest Airlines Corporation, Northwest Airlines, Inc. and State
            Street Bank and Trust Company of Connecticut, National Association,
            as Pass Through Trustee

4(b)(1)     Pass Through Trust Supplement No. 1999-2A, dated as of June 25,
            1999, by and among Northwest Airlines Corporation, as Guarantor,
            Northwest Airlines, Inc., and State Street Bank and Trust Company of
            Connecticut, National Association, as Pass Through Trustee

4(b)(2)     Pass Through Trust Supplement No. 1999-2B, dated as of June 25,
            1999, by and among Northwest Airlines Corporation, as Guarantor,
            Northwest Airlines, Inc., and State Street Bank and Trust Company of
            Connecticut, National Association, as Pass Through Trustee

4(b)(3)     Pass Through Trust Supplement No. 1999-2C, dated as of June 25,
            1999, by and among Northwest Airlines Corporation, as Guarantor,
            Northwest Airlines, Inc., and State Street Bank and Trust Company of
            Connecticut, National Association, as Pass Through Trustee
<PAGE>

4(c)(1)     Irrevocable Revolving Credit Agreement (1999-2A), dated as of June
            25, 1999, between State Street Bank and Trust Company, as Borrower,
            and Citibank N.A., as Liquidity Provider

4(c)(2)     Irrevocable Revolving Credit Agreement (1999-2B), dated as of June
            25, 1999, between State Street Bank and Trust Company, as Borrower,
            and Citibank N.A., as Liquidity Provider

4(c)(3)     Irrevocable Revolving Credit Agreement (1999-2C), dated as of June
            25, 1999, between State Street Bank and Trust Company, as Borrower,
            and Citibank N.A., as Liquidity Provider

4(d)        Intercreditor Agreement, dated as of June 25, 1999, by and among
            State Street Bank and Trust Company of Connecticut, National
            Association, as Pass Through Trustee, Citibank, N.A., as Liquidity
            Provider and State Street Bank and Trust Company of Connecticut,
            National Association, as Subordination Agent

4(e)(1)     Deposit Agreement (Class A), dated as of June 25, 1999, between
            First Security Bank, National Association, as Escrow Agent and ABN
            AMRO Bank N.V., Chicago Branch, as Depositary

4(e)(2)     Deposit Agreement (Class B), dated as of June 25, 1999, between
            First Security Bank, National Association, as Escrow Agent and ABN
            AMRO Bank N.V., Chicago Branch, as Depositary

4(e)(3)     Deposit Agreement (Class C), dated as of June 25, 1999, between
            First Security Bank, National Association, as Escrow Agent and ABN
            AMRO Bank N.V., Chicago Branch, as Depositary

4(f)(1)     Escrow and Paying Agent Agreement (Class A), dated as of June 25,
            1999 among First Security Bank, National Association, as Escrow
            Agent, Salomon Smith Barney Inc., Credit Suisse First Boston
            Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
            Inc. and Deutsche Bank Securities Inc., as Underwriters, State
            Street Bank and Trust Company of Connecticut, National Association,
            as Pass Through Trustee, and State Street Bank and Trust Company, a
            Massachusetts Trust Company, as Paying Agent

4(f)(2)     Escrow and Paying Agent Agreement (Class B), dated as of June 25,
            1999 among First Security Bank, National Association, as Escrow
            Agent, Salomon Smith Barney Inc., Credit Suisse First Boston
            Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
            Inc. and Deutsche Bank Securities Inc., as Underwriters, State
            Street Bank and Trust Company of Connecticut, National Association,
            as Pass Through Trustee, and State Street Bank and Trust Company, a
            Massachusetts Trust Company, as Paying Agent
<PAGE>

4(f)(3)     Escrow and Paying Agent Agreement (Class C), dated as of June 25,
            1999 among First Security Bank, National Association, as Escrow
            Agent, Salomon Smith Barney Inc., Credit Suisse First Boston
            Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
            Inc. and Deutsche Bank Securities Inc., as Underwriters, State
            Street Bank and Trust Company of Connecticut, National Association,
            as Pass Through Trustee, and State Street Bank and Trust Company, a
            Massachusetts Trust Company, as Paying Agent

4(g)        Note Purchase Agreement, dated as of June 25, 1999, among Northwest
            Airlines, Inc., State Street Bank and Trust Company of Connecticut,
            National Association, as Pass Through Trustee, State Street Bank and
            Trust Company of Connecticut, National Association, as Subordination
            Agent, First Security Bank, National Association, as Escrow Agent,
            and State Street Bank and Trust Company, a Massachusetts Trust
            Company, as Paying Agent

99(a)       Participation Agreement [NW 1999__], dated as of [____], among
            Northwest Airlines, Inc. as Lessee, Northwest Airlines Corporation,
            as Guarantor, the Owner Participant named therein, as Owner
            Participant, State Street Bank and Trust Company of Connecticut,
            National Association, as Pass Through Trustee and Subordination
            Agent, First Security Bank, National Association, as Owner Trustee,
            and State Street Bank and Trust Company, a Massachusetts Trust
            Company, as Indenture Trustee

99(b)       Lease Agreement [NW 1999__], dated as of [____], between First
            Security Bank, National Association, as Owner Trustee, and Northwest
            Airlines, Inc., as Lessee

99(c)       Trust Indenture and Security Agreement [NW____], dated as of [____],
            between First Security Bank, National Association, as Owner Trustee,
            and State Street Bank and Trust Company, a Massachusetts Trust
            Company, as Indenture Trustee

99(d)       Purchase Agreement Assignment [NW 1999__], dated as of, [____],
            between Northwest Airlines, Inc., as Assigner, and First Security
            Bank, National Association, as Assignee

99(e)       Trust Agreement [NW 1999__], dated as of [____], between [____],
            as Owner Participant, and First Security Bank, National Association,
            as Owner Trustee

99(f)       Guarantee [NW 1999__], dated as of [____], from Northwest Airlines
            Corporation

99(g)       Participation Agreement [NW 1999__], dated as of [____], among
            Northwest Airlines, Inc., as Owner, Northwest Airlines Corporation,
            as Guarantor, State Street Bank and Trust Company of Connecticut,
            National Association, as Pass Through Trustee and State Street Bank
            and Trust Company, a Massachusetts Trust Company, as Indenture
            Trustee and Subordination Agent

99(h)       Trust Indenture and Security Agreement [NW 1999__], dated as of
            [____], between Northwest Airlines, Inc., as Owner, and State
            Street Bank and Trust Company, as Indenture Trustee
<PAGE>

99(i)       Guarantee [NW 1999__], dated as of [____], from Northwest Airlines
            Corporation

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                        NORTHWEST AIRLINES CORPORATION


Dated: August 10, 1999                  By: /s/ Douglas M. Steenland
                                            ------------------------------------
                                        Name: Douglas M. Steenland
                                        Senior Vice President, General
                                               Counsel and Secretary


================================================================================

                       NORTHWEST AIRLINES, INC., ISSUER

                  NORTHWEST AIRLINES CORPORATION, GUARANTOR

                          Pass Through Certificates
                                Series 1999-2

                            UNDERWRITING AGREEMENT

Dated: June 18, 1999

================================================================================
<PAGE>

                       NORTHWEST AIRLINES, INC., ISSUER

                   NORTHWEST AIRLINES CORPORATION, GUARANTOR

                            UNDERWRITING AGREEMENT

                                                      June 18, 1999

Salomon Smith Barney Inc.
Credit Suisse First Boston Corporation
ABN AMRO Incorporated
Credit Lyonnais Securities (USA)  Inc.
Deutsche Bank Securities Inc.
c/o Salomon Smith Barney Inc.
390 Greenwich Street
New York, New York 10013

Ladies and Gentlemen:

            Northwest Airlines, Inc., a Minnesota corporation (the "Company"),
proposes that State Street Bank and Trust Company of Connecticut, National
Association, as pass through trustee (the "Trustee") under the Class A Trust,
the Class B Trust and the Class C Trust (each as defined below), issue and sell
to the underwriters named in Schedule II hereto its pass through certificates in
the aggregate principal amounts and with the interest rates and final
distribution dates set forth on Schedule I hereto (the "Offered Certificates")
on the terms and conditions stated herein. The aggregate principal amount of
Offered Certificates due on each such final distribution date is referred to as
a "Pass Through Certificate Designation."

            The Offered Certificates will be issued pursuant to the Pass Through
Trust Agreement, dated June 3, 1999, among Northwest Airlines Corporation, a
Delaware corporation and the ultimate parent company of the Company (the
"Guarantor"), the Company and the Trustee (the "Basic Agreement"), as
supplemented with respect to each series of Offered Certificates by a separate
Pass Through Trust Supplement to be dated as of the Closing Date (as defined
below) (individually, a "Trust Supplement"), among the Guarantor, the Company
and the
<PAGE>
                                       2


Trustee (the Basic Agreement as supplemented by each such Trust Supplement being
referred to herein individually as a "Pass Through Agreement"). The Trust
Supplements are related to the creation and administration of Northwest Airlines
Pass Through Trust, Series 1999-2A (the "Class A Trust"), Northwest Airlines
Pass Through Trust, Series 1999-2B (the "Class B Trust") and Northwest Airlines
Pass Through Trust, Series 1999-2C (the "Class C Trust" and, together with the
Class A Trust and the Class B Trust, the "Trusts").

            As used herein, unless the context otherwise requires, the term
"Underwriters" shall mean the firms named as Underwriters in Schedule II, and
the term "you" shall mean the Underwriter or Underwriters, if no underwriting
syndicate is purchasing the Offered Certificates, or the representative or
representatives of the Underwriters, if an underwriting syndicate is purchasing
the Offered Certificates, as indicated in Schedule II.

            The cash proceeds of the offering of Offered Certificates by each
Trust will be paid to First Security Bank, National Association, as escrow agent
(the "Escrow Agent"), under an Escrow and Paying Agent Agreement among the
Escrow Agent, the Underwriters, the Trustee and State Street Bank and Trust
Company, as paying agent (the "Paying Agent"), for the benefit of the holders of
Offered Certificates issued by such Trust (each, an "Escrow Agreement"). The
Escrow Agent will deposit such cash proceeds (each, a "Deposit") with ABN AMRO
Bank N.V., Chicago Branch (the "Depositary"), in accordance with a Deposit
Agreement relating to the respective Trust (the "Deposit Agreement"), and will
withdraw Deposits upon request to allow the Trustee to purchase Equipment Notes
(as defined in the Note Purchase Agreement referred to herein) from time to time
pursuant to a Note Purchase Agreement to be dated as of the Closing Date (the
"Note Purchase Agreement") among the Company, the Trustee of each of the Trusts
and State Street Bank and Trust Company, as Subordination Agent (as hereinafter
defined) and as Paying Agent, and the Escrow Agent. The Escrow Agent will issue
receipts to be attached to each related Offered Certificate ("Escrow Receipts")
representing each holder's fractional undivided interest in amounts deposited
with the Escrow Agent and will pay to such holders through the related Paying
Agent interest accrued on the Deposits and received by such Paying Agent
pursuant to the related Deposit Agreement at a rate per annum equal to the
interest rate applicable to the corresponding Offered Certificates.

            Certain amounts of interest payable on the Offered Certificates will
be entitled to the benefits of separate liquidity facilities. Citibank, N.A.
(the "Liquidity Provider") will enter into a separate revolving credit agreement
with respect to each Trust (each, a "Liquidity Facility") to be dated as of the
Closing Date for the benefit of the holders of the Offered Certificates. The
Liquidity Provider and the holders of the Offered Certificates will be entitled
to the benefits of an Intercreditor Agreement to be dated as of the Closing Date
(the "Intercreditor Agreement") among the Trustee, State Street Bank and Trust
Company, as subordination agent thereunder (the "Subordination Agent"), and the
Liquidity Provider.
<PAGE>
                                       3


            The Guarantor and the Company have filed with the Securities and
Exchange Commission (the "Commission") two shelf registration statements on Form
S-3 (File No. 333-41579 and File No. 333-79215) relating to certain classes of
securities (the "First Registration Statement" and the "Second Registration
Statement", respectively; the First and the Second Registration Statements,
collectively, including the exhibits thereto and the documents filed by the
Guarantor with the Commission pursuant to the Securities Exchange Act of 1934,
as amended, and the rules and regulations of the Commission thereunder
(collectively, the "Exchange Act") that are incorporated by reference therein,
as amended at the date hereof, being herein referred to as the "Registration
Statements") and the offering thereof from time to time in accordance with Rule
415 of the Securities Act of 1933, as amended, and the rules and regulations of
the Commission thereunder (collectively, the "Securities Act"). The Registration
Statements have been declared effective by the Commission. A prospectus
supplement reflecting the terms of the Offered Certificates, the terms of the
offering thereof and the other matters set forth therein, as further specified
in Section 5(c) hereof, will be prepared and filed together with the base
prospectus referred to below pursuant to Rule 424 under the Securities Act (such
prospectus supplement, in the form first filed on or after the date hereof
pursuant to Rule 424, being herein referred to as the "Prospectus Supplement"
and any prospectus supplement relating to the Offered Certificates filed prior
to the filing of the Prospectus Supplement being herein referred to as a
"Preliminary Prospectus Supplement"). The base prospectus, dated June 7, 1999,
included in the Second Registration Statement relating to offerings of pass
through certificates, as supplemented by the Prospectus Supplement, and
including the documents incorporated by reference therein, is herein called the
"Prospectus", except that, if such base prospectus is amended or supplemented on
or prior to the date on which the Prospectus Supplement is first filed pursuant
to Rule 424, the term "Prospectus" shall refer to such base prospectus as so
amended or supplemented and as supplemented by the Prospectus Supplement, in
either case including the documents incorporated by reference therein. Any
reference herein to the terms "amendment" or "supplement" with respect to the
Second Registration Statement, the Prospectus, any Preliminary Prospectus
Supplement or any preliminary prospectus shall be deemed to refer to and include
any documents filed with the Commission under the Exchange Act after the date
hereof, the date the Prospectus is filed with the Commission, or the date of
such Preliminary Prospectus Supplement or preliminary prospectus, as the case
may be, and incorporated therein by reference pursuant to Item 12 of Form S-3
under the Securities Act.

            Capitalized terms not otherwise defined in this Agreement shall have
the meanings specified therefor in the Pass Through Agreements, the Note
Purchase Agreement or the Intercreditor Agreement referred to in the Pass
Through Agreements; provided that, as used in this Agreement, the term
"Operative Documents" shall mean the Deposit Agreements, the Escrow Agreements,
the Intercreditor Agreement, the Liquidity Facilities, the Pass Through
Agreements, the Note Purchase Agreement, the Participation Agreements, the
Indentures, the Leases and the Guarantees.
<PAGE>
                                       4


            Section 1. Representations and Warranties. The Guarantor and the
Company jointly and severally represent and warrant to, and agree with each
Underwriter that:

            (a) The Guarantor and the Company meet the requirements for use of
      Form S-3 under the Securities Act; the Registration Statements have become
      effective; on the original effective date of each Registration Statement,
      on the effective date of the most recent post-effective amendment thereto,
      if any, and on the date of the filing by the Guarantor of any annual
      report on Form 10-K after the original effective date of each Registration
      Statement, each Registration Statement and any amendments and supplements
      thereto complied in all material respects with the requirements of the
      Securities Act and neither Registration Statement contained an untrue
      statement of a material fact or omitted to state a material fact required
      to be stated therein or necessary to make the statements therein not
      misleading; on the date hereof and on the Closing Date (as defined below),
      neither the Prospectus nor any amendments thereof and supplements thereto,
      includes or will include an untrue statement of a material fact or omits
      or will omit to state a material fact necessary in order to make the
      statements therein, in the light of the circumstances under which they
      were made, not misleading; provided, however, that this representation and
      warranty shall not apply to any statements or omissions based upon
      information relating to any Underwriter furnished in writing to the
      Guarantor or the Company by or on behalf of any Underwriter expressly for
      use in the Prospectus or to statements or omissions in that part of the
      Registration Statements which shall constitute the Statement of
      Eligibility of the Trustee under the Trust Indenture Act of 1939, as
      amended (the "Trust Indenture Act"), on Form T-1.

            (b) The documents incorporated by reference in the Prospectus
      pursuant to Item 12 of Form S-3 under the Securities Act, at the time they
      were or hereafter are filed with the Commission, complied and will comply
      in all material respects with the requirements of the Exchange Act.

            (c) Ernst & Young LLP, who have reported upon the audited
      consolidated financial statements and the financial statement schedules,
      if any, included or incorporated by reference in the Registration
      Statements, are independent public accountants within the meaning of the
      Securities Act.

            (d) This Agreement has been duly authorized, executed and delivered
      by each of the Company and the Guarantor.

            (e) The Company does not have any "significant subsidiaries" as
      defined in Regulation S-X, and the Guarantor does not have any significant
      subsidiaries (other than the Company).
<PAGE>
                                       5


            (f) The consolidated financial statements included or incorporated
      by reference in the Registration Statements present fairly the
      consolidated financial position of the Guarantor and its consolidated
      subsidiaries as of the dates indicated and the consolidated results of
      operations and cash flows or changes in financial position of the
      Guarantor and its consolidated subsidiaries for the periods specified.
      Except as stated therein, such financial statements have been prepared in
      conformity with generally accepted accounting principles applied on a
      consistent basis throughout the periods involved. The financial statement
      schedules, if any, included or incorporated by reference in the
      Registration Statements present fairly the information required to be
      stated therein. The summary consolidated financial data included in the
      Prospectus present fairly the information shown therein and have been
      compiled on a basis consistent with that of the audited consolidated
      financial statements included or incorporated by reference in the
      Registration Statements.

            (g) Each of the Company and the Guarantor is a corporation duly
      organized, validly existing and in good standing under the laws of the
      State of Minnesota and Delaware, respectively, with corporate power and
      authority under such laws to own, lease and operate its properties and
      conduct its business as described in the Prospectus and to perform its
      obligations under this Agreement; and each of the Guarantor and the
      Company is duly qualified to transact business as a foreign corporation
      and is in good standing in each other jurisdiction in which it owns or
      leases property of a nature, or transacts business of a type, that would
      make such qualification necessary, except to the extent that the failure
      to so qualify or be in good standing would not have a material adverse
      effect on the condition (financial or other), earnings, business or
      prospects of the Guarantor and its consolidated subsidiaries, considered
      as one enterprise (a "Material Adverse Effect").

            (h) The Company is a "citizen of the United States" (as defined in
      Section 40102(a)(15) of Title 49 of the United States Code) and is an air
      carrier operating under a certificate issued by the Secretary of
      Transportation pursuant to Chapter 447 of Title 49, United States Code,
      for aircraft capable of carrying 10 or more individuals or 6,000 pounds or
      more of cargo. There is in force with respect to the Company an air
      carrier operating certificate issued pursuant to Part 121 of the
      regulations under the sections of Title 49, United States Code, relating
      to aviation (the "Federal Aviation Act"). All of the outstanding shares of
      capital stock of the Company have been duly authorized and validly issued
      and are fully paid and non-assessable and are owned by the Guarantor,
      indirectly through Northwest Airlines Holdings Corporation and NWA Inc.,
      each a Delaware corporation, free and clear of any pledge, lien, security
      interest, charge, claim, equity or encumbrance of any kind.

            (i) The Operative Documents to which the Guarantor and/or the
      Company will be a party will be duly executed and delivered by the
      Guarantor and/or the Company, as the case may be, on or prior to the
      Closing Date or the applicable Delivery Date (as defined in the
      Participation Agreements), as the case may be.
<PAGE>
                                       6


            (j) The Operative Documents to which the Guarantor and/or the
      Company is, or is to be, a party are or will be substantially in the form
      heretofore supplied to you (in the case of the Indentures, the Leases and
      the Participation Agreements relating to the Leased Aircraft, except for
      such modifications permitted by the Note Purchase Agreement), and, when
      duly executed and delivered by the Guarantor or the Company, as the case
      may be, will constitute valid and binding obligations of the Guarantor or
      the Company, as the case may be, enforceable against the Guarantor and the
      Company, as the case may be, in accordance with their terms, except as may
      be subject to (A) bankruptcy, insolvency, fraudulent conveyance,
      reorganization, moratorium and other similar laws relating to or affecting
      creditors' rights generally, (B) general principles of equity (regardless
      of whether enforcement is considered in a proceeding in equity or at law),
      (C) in the case of any Lease, applicable laws which may affect the
      remedies provided therein but which do not affect the validity of such
      Lease or make such remedies inadequate for the potential realization of
      the benefits intended to be provided thereby and (D) an implied covenant
      of good faith and fair dealing. The Basic Agreement as executed is
      substantially in the form filed as an exhibit to the Second Registration
      Statement and has been duly qualified under the Trust Indenture Act. The
      Offered Certificates, the Equipment Notes and the Operative Documents will
      conform in all material respects to the descriptions thereof in the
      Prospectus.

            (k) When executed, authenticated, issued and delivered in the manner
      provided for in each Pass Through Agreement and sold and paid for as
      provided in this Agreement, the Offered Certificates will constitute valid
      and binding obligations of the related Trustees, entitled to the benefits
      of the related Pass Through Agreements and enforceable against the related
      Trustees in accordance with their terms, except as may be subject to (A)
      bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium
      and other similar laws relating to or affecting creditors' rights
      generally, (B) general principles of equity (regardless of whether
      enforcement is considered in a proceeding in equity or at law) and (C) an
      implied covenant of good faith and fair dealing. When executed,
      authenticated, issued and delivered in the manner provided for in the
      related Escrow Agreements, the Escrow Receipts will be legally and validly
      issued and will be entitled to the benefits of the related Escrow
      Agreements.

            (l) The Equipment Notes to be issued under each Indenture, when duly
      executed and delivered by the related Owner Trustee or the Company, as the
      case may be, and duly authenticated by the Indenture Trustee in accordance
      with the terms of such Indenture, will be duly issued under such Indenture
      and will constitute the valid and binding obligations of such Owner
      Trustee or the Company, as the case may be, except as may be subject to
      (A) bankruptcy, insolvency, fraudulent conveyance, reorganization,
      moratorium and other similar laws relating to or affecting creditors'
      rights generally, (B) general principles of equity (regardless of whether
      enforcement is considered in a
<PAGE>
                                       7


      proceeding in equity or at law) and (C) an implied covenant of good faith
      and fair dealing. The holders of the Equipment Notes will be entitled to
      the benefits of such Indenture.

            (m) Since the respective dates as of which information is given in
      the Prospectus, except as otherwise stated therein or contemplated
      thereby, there has not been any material adverse change in the condition
      (financial or otherwise), earnings, business or prospects of the Guarantor
      and its consolidated subsidiaries, considered as one enterprise, whether
      or not arising in the ordinary course of business.

            (n) Neither the Company nor the Guarantor is in default in the
      performance or observance of any obligation, agreement, covenant or
      condition contained in any contract, indenture, mortgage, loan agreement,
      note, lease or other agreement or instrument to which it is a party or by
      which it may be bound or to which any of its properties may be subject,
      except for such defaults that would not have a Material Adverse Effect.
      The execution and delivery by the Company and the Guarantor of this
      Agreement and by the Company and/or the Guarantor of the Operative
      Documents to which the Company and/or Guarantor is, or is to be, a party,
      the issuance and delivery of the Offered Certificates, the consummation by
      the Company and the Guarantor of the transactions contemplated by this
      Agreement, by such Operative Documents and the Prospectus, and compliance
      by the Company and the Guarantor with the terms of this Agreement and such
      Operative Documents have been duly authorized by all necessary corporate
      action on the part of the Company and the Guarantor and do not and will
      not result in any violation of the charter or by-laws of the Company or
      the Guarantor, and do not and will not result in a breach of any of the
      terms or provisions of, or constitute a default under, or result in the
      creation or imposition of any lien, charge or encumbrance upon any
      property or assets of the Company or the Guarantor under (A) any contract,
      indenture, mortgage, loan agreement, note, lease or other agreement or
      other instrument to which the Company or the Guarantor is a party or by
      which either may be bound or to which any of its properties may be subject
      and which is included or incorporated by reference as an exhibit to any
      document incorporated by reference in the Prospectus or included as an
      exhibit to the Registration Statements (other than the Operative Documents
      and except for such breaches, defaults, liens, charges or encumbrances
      that would not have a Material Adverse Effect) or (B) any existing
      applicable law, rule, regulation, judgment, order or decree of any
      government, governmental instrumentality or court, domestic or foreign,
      having jurisdiction over the Company or the Guarantor or any of their
      respective properties (other than the securities or Blue Sky or similar
      laws of the various states and of foreign jurisdictions), except for such
      breaches, defaults, liens, charges or encumbrances that would not have a
      Material Adverse Effect.

            (o) No authorization, approval, consent, order or license of or
      filing with or notice to any government, governmental instrumentality or
      court, domestic or foreign, is required for the valid authorization,
      issuance, sale and delivery of the Offered Certificates
<PAGE>
                                       8


      and the Equipment Notes, the valid authorization, execution, delivery and
      performance by the Guarantor and/or the Company of this Agreement and the
      Operative Documents to which the Guarantor and/or the Company is, or is to
      be, a party, or the consummation by the Guarantor or the Company of the
      transactions contemplated by this Agreement and such Operative Documents,
      except such as are required under the Securities Act, the Trust Indenture
      Act and the securities or Blue Sky or similar laws of the various states
      and of foreign jurisdictions and except for filings or recordings with the
      Federal Aviation Administration (the "FAA") and under the Uniform
      Commercial Code as is in effect in Utah and Minnesota, which filings or
      recordings shall have been made, or duly presented for filing, on or prior
      to the applicable Delivery Date (as defined in the Participation Agreement
      relating to the Aircraft to be acquired or leased on such date).

            (p) Except as disclosed in the Prospectus, there is no action, suit
      or proceeding before or by any government, governmental instrumentality or
      court, domestic or foreign, now pending or, to the knowledge of the
      Company or the Guarantor, threatened against the Company or the Guarantor
      that is required to be disclosed in the Prospectus or that could
      reasonably be expected to have a Material Adverse Effect or that could
      reasonably be expected to materially and adversely affect the consummation
      of the transactions contemplated by this Agreement; the aggregate of all
      pending legal or governmental proceedings that are not described in the
      Prospectus to which the Company or the Guarantor is a party or which
      affect any of their respective properties, including ordinary routine
      litigation incidental to their business, would not reasonably be expected
      to have a Material Adverse Effect.

            (q) There are no contracts or documents of a character required to
      be described in the Registration Statements or the Prospectus or to be
      filed as exhibits to the Registration Statements that are not described
      and filed as required.

            (r) The Company and the Guarantor each possess all adequate
      certificates, authorizations and permits issued by appropriate
      governmental agencies or bodies which are necessary to conduct, in all
      material respects, the business now operated by them and have not received
      any notice of proceedings relating to the revocation or modification of
      any such certificate, authorization or permit that, if determined
      adversely to the Company or the Guarantor, would have, singly or in the
      aggregate, a Material Adverse Effect.

            (s) Except as disclosed in the Prospectus, no labor dispute with the
      employees of the Company or the Guarantor exists or, to the knowledge of
      the Company and the Guarantor, is imminent, in either case, which might
      reasonably be expected to have a Material Adverse Effect.

            (t) None of the Guarantor, the Company or any Trust is an
      "investment company", within the meaning of the Investment Company Act of
      1940, as amended (the
<PAGE>
                                       9


      "Investment Company Act"); and after giving effect to the offering and
      sale of the Offered Certificates and the application of the proceeds
      thereof as described in the Prospectus, none of the Trusts will be, nor
      will the escrow arrangements relating to the Trusts contemplated by the
      respective Escrow Agreements result in the creation of, an "investment
      company", as defined in the Investment Company Act.

            (u) The Company and the Guarantor have not taken and will not take,
      directly or indirectly, any action prohibited by Regulation M under the
      Exchange Act, to the extent applicable, in connection with the offering of
      the Offered Certificates.

            (v) The information regarding year 2000 compliance and the Euro
      conversion included or incorporated by reference in the Registration
      Statements and the Prospectus complies in all material respects with the
      requirements of the Securities Act (including Staff Legal Bulletin No. 6,
      SEC Release No. 33-7558 (July 29, 1998) and SEC Release No. 33-7609
      (November 9, 1998)).

            Any certificate signed by a duly authorized officer of the Company
or the Guarantor and delivered to an Underwriter or to counsel for the
Underwriters in connection with the offering of Offered Certificates shall be
deemed a representation and warranty by the Company or the Guarantor, as the
case may be, to the Underwriters as to the matters covered thereby.

            Section 2. Purchase and Sale. (a) Subject to the terms and
conditions set forth herein and in Schedule III, and in reliance upon the
representations and warranties herein contained, the Guarantor and the Company
agree to cause the Trustee to sell to each Underwriter, and each Underwriter
agrees, severally and not jointly, to purchase from the Trustee, at the purchase
price specified in Schedule I, the respective amounts of Offered Certificates of
each Pass Through Certificate Designation set forth opposite the name of such
Underwriter in Schedule II. Concurrently with the issuance of the Offered
Certificates, the Escrow Agent shall issue and deliver to the Trustee the Escrow
Receipts in accordance with the terms of the Escrow Agreements, which Escrow
Receipts shall be attached to the related Offered Certificates.

            (b) The Company is advised by you that the Underwriters propose to
make a public offering of the Offered Certificates as soon after this Agreement
has been entered into as in your judgment is advisable as set forth in the
Prospectus.

            (c) As compensation to the Underwriters for their respective
commitments and obligations hereunder in respect of the Offered Certificates,
including their respective undertakings to distribute the Offered Certificates,
the Company will pay to the Underwriters the sum set forth in Schedule III. Such
payment will be made on the Closing Date simultaneously with the issuance and
sale of the Offered Certificates (with the related Escrow Receipts attached)
<PAGE>
                                       10


to the Underwriters. Payment of such compensation shall be made by wire transfer
of immediately available funds.

            Section 3. Delivery of and Payment for the Offered Certificates. (a)
Delivery of and payment for the Offered Certificates (with attached Escrow
Receipts) shall be made at the offices of Simpson, Thacher & Bartlett, 425
Lexington Avenue, New York, New York 10017-3954 at 10:00 A.M. on June , 1999 or
on such other date, time and place as may be agreed upon by the Company, the
Guarantor and you (such date and time of delivery and payment for the Offered
Certificates being herein called the "Closing Date"). Delivery of the Offered
Certificates (with attached Escrow Receipts) issued by each Trust shall be made
to your account at The Depository Trust Company for the respective accounts of
the several Underwriters against payment by the Underwriters to or upon the
order of the Trustee by wire transfer of immediately available funds to the
Company's account at Norwest Bank (National Association) or as otherwise
instructed in writing by the Company. Upon delivery the Offered Certificates
shall be registered in the name of Cede & Co. or in such other names, and in
such denominations as you may request in writing at least two full business days
in advance of the Closing Date.

            (b) The Company agrees to have one or more global certificates
representing the Offered Certificates available for inspection and checking by
you in New York, New York not later than one full business day prior to the
Closing Date.

            Section 4. Conditions of Underwriters' Obligations. The several
obligations of the Underwriters to purchase and pay for the Offered Certificates
pursuant to this Agreement are subject to the following conditions:

            (a) On the Closing Date, no stop order suspending the effectiveness
      of either Registration Statement shall have been issued under the
      Securities Act and no proceedings therefor shall have been instituted or
      threatened by the Commission.

            (b) On the Closing Date, you shall have received an opinion of each
      of Simpson Thacher & Bartlett, counsel for the Company and the Guarantor,
      and Cadwalader, Wickersham & Taft, special counsel for the Company and the
      Guarantor, each dated the Closing Date and in form and substance
      reasonably satisfactory to you and counsel for the Underwriters,
      substantially to the effect set forth in Exhibits A-1 and A-2 hereto,
      respectively.

            (c) On the Closing Date, you shall have received an opinion of the
      General Counsel of the Company and the Guarantor, dated the Closing Date
      and in form and substance reasonably satisfactory to you and counsel for
      the Underwriters, substantially to the effect set forth in Exhibit B
      hereto.
<PAGE>
                                       11


            (d) On the Closing Date, you shall have received an opinion of
      Bingham Dana LLP, counsel for State Street Bank and Trust Company of
      Connecticut, National Association, individually and as Trustee, and
      counsel for State Street Bank and Trust Company, individually and as
      Subordination Agent and Paying Agent, dated the Closing Date and in form
      and substance reasonably satisfactory to you and counsel to the
      Underwriters, substantially to the effect as set forth in Exhibit C
      hereto.

            (e) On the Closing Date, you shall have received an opinion of Ray,
      Quinney & Nebeker, counsel for the Escrow Agent, dated the Closing Date,
      and in form and substance reasonably satisfactory to you and counsel to
      the Underwriters, substantially to the effect as set forth in Exhibit D
      hereto.

            (f) On the Closing Date, you shall have received an opinion of
      Milbank, Tweed, Hadley & McCloy, counsel for the Liquidity Provider, dated
      the Closing Date and in form and substance reasonably satisfactory to you
      and counsel to the Underwriters, substantially to the effect as set forth
      in Exhibit E hereto.

            (g) On the Closing Date, you shall have received an opinion of
      Clifford Chance, Netherlands counsel for the Depositary, and an opinion of
      Vedder, Price, Kaufman & Kammholz, U.S. counsel for the Depositary, each
      dated the Closing Date and in form and substance reasonably satisfactory
      to you and substantially to the effect set forth in Exhibits F-1 and F-2
      hereto, respectively.

            (h) On the Closing Date, you shall have received an opinion of
      Shearman & Sterling, as counsel for the Underwriters, dated the Closing
      Date, with respect to the issuance and sale of the Offered Certificates,
      the Registration Statements, the Prospectus and other related matters as
      the Underwriters may reasonably require.

            (i) On the Closing Date, (i) (A) the Registration Statements, as
      they may then be amended or supplemented, shall not contain an untrue
      statement of a material fact or omit to state a material fact required to
      be stated therein or necessary to make the statements therein not
      misleading, (B) the Prospectus, as it may then be amended or supplemented,
      shall not contain an untrue statement of a material fact or omit to state
      a material fact required to be stated therein or necessary to make the
      statements therein not misleading in light of the circumstances under
      which they were made, (C) the Company and the Guarantor shall have
      complied with all agreements and satisfied all conditions on their
      respective parts to be performed or satisfied at or prior to the Closing
      Date, and (D) the other representations and warranties of the Company and
      the Guarantor set forth in this Agreement and each of the Operative
      Documents shall be accurate in all material respects as though expressly
      made at and as of the Closing Date (except to the extent that such
      representations and warranties refer to an earlier or later date, in which
      case they shall be accurate in all material respects as of such dates) and
      (ii) subsequent to the
<PAGE>
                                       12


      execution and delivery of this Agreement, there shall not have been any
      material adverse change in the condition (financial or other), earnings,
      business or prospects of the Guarantor and its consolidated subsidiaries,
      considered as one enterprise, whether or not arising in the ordinary
      course of business that, in your judgment, is so material and adverse that
      it makes it impracticable or inadvisable to proceed with the public
      offering or the sale of and payment for the Offered Certificates. At the
      Closing Date, you shall have received a certificate of the President or a
      Senior or Executive Vice President, and other senior officers of the
      Company and the Guarantor approved by you, dated as of the Closing Date,
      to such effect.

            (j) On each of the date hereof and the Closing Date, you shall have
      received a letter, dated the date hereof or the Closing Date, as the case
      may be, in form and substance satisfactory to you and counsel to the
      Underwriters, from Ernst & Young LLP, the Company's independent public
      accountants, containing statements and information of the type ordinarily
      included in accountants' "comfort letters" to underwriters with respect to
      the financial statements and certain other financial or statistical data
      and certain financial information contained in or incorporated by
      reference into the Registration Statements and the Prospectus.

            (k) Subsequent to the execution and delivery of this Agreement and
      prior to the Closing Date, there shall not have been any downgrading nor
      any notice given to the Company or the Guarantor or any public notice
      given, in either case by a rating agency described below, of any intended
      or potential downgrading or of a possible change that does not indicate
      the direction of the possible change, in the rating accorded any of the
      Company's or the Guarantor's securities, including Offered Certificates,
      by any "nationally recognized statistical rating organization", as such
      term is defined for purposes of Rule 436(g)(2) under the Securities Act.

            (l) The Company and the Guarantor shall have furnished to you and to
      counsel for the Underwriters, in form and substance satisfactory to you
      and to them, such other documents, certificates and opinions as such
      counsel may reasonably request in order to pass upon the matters referred
      to in Section 4(h) and in order to evidence the accuracy and completeness
      of any of the representations, warranties or statements, the performance
      of any covenant by the Company or the Guarantor theretofore to be
      performed, or the compliance with any of the conditions herein contained.

            (m) On the Closing Date, each of the Operative Documents (other than
      the Indentures, Leases, Participation Agreements and Guarantees) shall
      have been duly executed and delivered by each of the parties thereto; the
      representations and warranties of the Company and the Guarantor contained
      in each of such executed Operative Documents shall be true and correct in
      all material respects as of the Closing Date (except to the extent that
      they relate solely to an earlier or later date, in which case they shall
      be
<PAGE>
                                       13


      true and correct as of such earlier or later date) and the Underwriters
      shall have received a certificate of the President or a Senior or
      Executive Vice President of the Company, dated as of the Closing Date, to
      such effect.

            (n) Each of the Appraisers shall have furnished to the Underwriters
      a letter from such Appraiser, addressed to the Guarantor and the Company
      and dated the Closing Date, confirming that such Appraiser and each of its
      directors and officers (i) is not an affiliate of the Guarantor, the
      Company or any of its affiliates, (ii) does not have any substantial
      interest, direct or indirect, in the Guarantor, the Company or any of its
      affiliates and (iii) is not connected with the Guarantor, the Company or
      any of its affiliates as an officer, employee, promoter, underwriter,
      trustee, partner, director or person performing similar functions.

            (o) On the Closing Date, the Offered Certificates shall be rated
      "AA", in the case of the Offered Certificates of the Class A Trust, "A",
      in the case of the Offered Certificates of the Class B Trust and "BBB+",
      in the case of the Offered Certificates of the Class C Trust, by Standard
      & Poor's Ratings Service; and "Aa3", in the case of the Offered
      Certificates of the Class A Trust, "A2", in the case of the Offered
      Certificates of the Class B Trust and "Baa2", in the case of the Offered
      Certificates of the Class C Trust, by Moody's Investors Service, Inc.

            The Guarantor and the Company agree to furnish, promptly after the
Closing Date and the applicable Delivery Date, to the Underwriters a copy of
each opinion required to be delivered under the applicable Participation
Agreement addressed to the Underwriters and of such other documents furnished in
connection with the fulfillment of the conditions precedent therein as the
Underwriters or counsel for the Underwriters may reasonably request.

            If any of the conditions specified in this Section 4 shall not have
been fulfilled when and as required by this Agreement to be fulfilled, this
Agreement may be terminated by you on notice to the Company and the Guarantor at
any time prior to the Closing Date and such termination shall be without
liability of any party to any other party, except as provided in Section 6.
Notwithstanding any such termination, the provisions of Section 7 shall remain
in effect.

            Section 5. Certain Covenants of the Company and the Guarantor. The
Company and the Guarantor covenant with each Underwriter as follows:

            (a) To furnish to you, without charge, as soon as practicable on the
      business day next succeeding the date of this Agreement and during the
      period mentioned in paragraph (e) below, as many copies of the Prospectus,
      and any supplements or amendments thereto, as you may reasonably request.
<PAGE>
                                       14


            (b) To furnish to you as many conformed copies of each Registration
      Statement (as originally filed) and of all amendments thereto, whether
      filed before or after such Registration Statement became effective, as
      many copies of all exhibits and documents filed therewith or incorporated
      by reference therein (through the end of the period mentioned in paragraph
      (e) below) and one signed and as many conformed copies of all consents and
      certificates of experts as you may reasonably request and, if requested by
      you, to furnish to you, for each of the Underwriters, one conformed copy
      of the Registration Statements (as originally filed) and of each amendment
      thereto (including documents incorporated by reference into the Prospectus
      but without exhibits).

            (c) Promptly following the execution of this Agreement, to prepare a
      Prospectus Supplement that complies with the Securities Act and that sets
      forth the principal amount of the Offered Certificates and their terms not
      otherwise specified in the Preliminary Prospectus Supplement or the base
      prospectus included in the Second Registration Statement, the name of each
      Underwriter participating in the offering and the principal amount of the
      Offered Certificates that each severally has agreed to purchase, the name
      of each Underwriter, if any, acting as a representative of the
      Underwriters in connection with the offering, the price at which the
      Offered Certificates are to be purchased by the Underwriters from the
      Company, any initial public offering price, any selling concession and
      reallowance and any delayed delivery arrangements, and such other
      information as you, the Company and the Guarantor deem appropriate in
      connection with the offering of the Offered Certificates. The Company and
      the Guarantor will timely transmit copies of the Prospectus Supplement to
      the Commission for filing pursuant to Rule 424 under the Securities Act.

            (d) Before amending or supplementing the Registration Statements or
      the Prospectus, to furnish each Underwriter with a copy of each such
      proposed amendment or supplement, and to file no such proposed amendment
      or supplement to which you reasonably object by notice to the Company
      after a reasonable period of review; provided that the foregoing shall not
      prevent the Guarantor from filing reports required to be filed by it
      pursuant to the Exchange Act, and provided further that the Guarantor
      shall have provided you with a copy of any such report prior to its filing
      with the Commission.

            (e) If, during such period after the first date of the public
      offering of the Offered Certificates when the Prospectus is required by
      law to be delivered in connection with sales of the Offered Certificates
      by an Underwriter or dealer, any event shall occur as a result of which it
      is necessary, in the reasonable opinion of counsel for the Underwriters or
      counsel for the Company and the Guarantor, to amend the Registration
      Statements or amend or supplement the Prospectus in order to make the
      statements therein, in the light of the circumstances when the Prospectus
      is delivered to a purchaser, not misleading, or if it is necessary, in the
      reasonable opinion of either such counsel, to amend the Registration
      Statements or amend or supplement the Prospectus to comply with law,
      forthwith to
<PAGE>
                                       15


      prepare and furnish, at its own expense, to the Underwriters and to the
      dealers (whose names and addresses you will furnish to the Company) to
      which the Offered Certificates may have been sold by you on behalf of the
      Underwriters and to any other dealers upon request, either amendments or
      supplements to the Prospectus so that the statements in the Prospectus as
      so amended or supplemented will not, in the light of the circumstances
      when the Prospectus is delivered to a purchaser, be misleading or so that
      the Registration Statements or the Prospectus, as so amended or
      supplemented, will comply with law and to cause such amendments or
      supplements to be filed promptly with the Commission.

            (f) During the period mentioned in paragraph (e) above, to notify
      you immediately, (i) of the effectiveness of any amendment to the
      Registration Statements, (ii) of the transmittal to the Commission for
      filing of any supplement to the Prospectus or any document that would as a
      result thereof be incorporated by reference in the Prospectus, (iii) of
      the receipt of any comments from the Commission with respect to the
      Registration Statement, the Prospectus or the Prospectus Supplement, (iv)
      of any request by the Commission for any amendment to the Registration
      Statements or any supplement to the Prospectus or for additional
      information relating thereto or to any document incorporated by reference
      in the Prospectus and (v) of the issuance by the Commission of any stop
      order suspending the effectiveness of the Registration Statements, of the
      suspension of the qualification of the Offered Certificates for offering
      or sale in any jurisdiction, or of the institution or threatening of any
      proceeding for any of such purposes; and to use every reasonable effort to
      prevent the issuance of any such stop order or of any order suspending
      such qualification and, if any such order is issued, to obtain the lifting
      thereof at the earliest possible moment.

            (g) To use their respective reasonable efforts, in cooperation with
      the Underwriters, to qualify the Offered Certificates for offer and sale
      under the securities laws of such states and other jurisdictions as you
      may reasonably request and to maintain such qualifications in effect for
      so long as required for the distribution of such Offered Certificates;
      provided, however, that neither the Company nor the Guarantor shall be
      obligated to file any general consent to service of process or to qualify
      as a foreign corporation or as a dealer in securities in any jurisdiction
      in which it is not so qualified or to subject itself to taxation in
      respect of doing business in any jurisdiction in which it is not otherwise
      so subject. The Company and the Guarantor will use their reasonable
      efforts to file such statement and reports as may be required by the laws
      of each jurisdiction in which the Offered Certificates have been qualified
      as above provided. The Company and the Guarantor will also supply you with
      such information as is necessary for the determination of legality of the
      Offered Certificates for investment under the laws of such jurisdictions
      as you may reasonably request.

            (h) To make generally available to the Guarantor's security holders
      as soon as practicable, but not later than 45 days after the close of the
      period covered thereby, an
<PAGE>
                                       16


      earnings statement of the Guarantor (in form complying with the provisions
      of Rule 158 of the Securities Act), covering (i) a period of 12 months
      beginning after the effective date of the Second Registration Statement
      and any post-effective amendment thereof but not later than the first day
      of the Guarantor's fiscal quarter next following such effective date and
      (ii) a period of 12 months beginning after the date of this Agreement but
      not later than the first day of the Guarantor's fiscal quarter next
      following the date of this Agreement.

            (i) For a period of two years after the Closing Date, to make
      available upon request to the Underwriters, copies of all annual reports,
      quarterly reports and current reports filed with the Commission on Forms
      10-K, 10-Q and 8-K, or such other similar forms as may be designated by
      the Commission, and such other documents, reports and information as shall
      be furnished by the Company or the Guarantor to the holders of Offered
      Certificates or to their security holders generally provided that at such
      time the Guarantor is required to furnish such reports under the Exchange
      Act.

            (j) Between the date of this Agreement and the Closing Date, not to
      offer, sell or enter into any agreement to sell, directly or indirectly,
      any equipment notes, pass through certificates, equipment trust
      certificates or equipment purchase certificates secured by aircraft owned
      or leased by the Company or the Guarantor (or rights relating thereto)
      other than the Offered Certificates or Equipment Notes relating thereto,
      without your prior written consent.

            (k) During the period when a prospectus relating to the Offered
      Certificates is required to be delivered under Section 5(c) of the
      Securities Act, to file promptly all documents required to be filed with
      the Commission pursuant to Section 13, 14 or 15(d) of the Exchange Act.

            (l) To comply to the best of their abilities with the Securities
      Act, the Exchange Act and the Trust Indenture Act so as to permit the
      completion of the distribution of the Offered Certificates as contemplated
      in this Agreement and in the Prospectus.

            Section 6. Payment of Expenses. The Company and the Guarantor will
pay or cause to be paid all costs and expenses incident to the performance of
their obligations under this Agreement, including, without limitation, (a) the
preparation, printing and filing of the Registration Statements (including
financial statements and exhibits), as originally filed and as amended, any
Preliminary Prospectus Supplement and the Prospectus and any amendments or
supplements thereto, and the cost of furnishing copies thereof to the
Underwriters, (b) the printing or processing and distribution of this Agreement,
the Offered Certificates, the Operative Documents, the Blue Sky Survey and any
Legal Investment Survey, (c) the delivery of the Offered Certificates, (d) the
fees and disbursements of counsel and accountants for the Guarantor and the
Company, (e) the qualification of the Offered Certificates under the applicable
securities
<PAGE>
                                       17


laws in accordance with Section 5(g), including filing fees and reasonable fees
and disbursements of counsel for the Underwriters in connection therewith and in
connection with the Blue Sky Survey, (f) any fees charged by rating agencies for
rating the Offered Certificates (including annual surveillance fees related to
the Offered Certificates as long as they are outstanding), (g) the fees and
expenses of the Trustee, the Subordination Agent, the Liquidity Provider, the
Depositary, the Escrow Agent and the Paying Agent, including the reasonable fees
and disbursements of their respective counsel for the Trustee, in connection
with the Offered Certificates and the Operative Documents, (h) the fees and
disbursements of counsel for the Underwriters, (i) all fees and expenses
relating to appraisals of the Aircraft and (j) all other reasonable
out-of-pocket expenses incurred by the Underwriters in connection with the
transactions contemplated by this Agreement. The Guarantor and the Company will
also cause to be paid all expenses incident to the performance of its
obligations under the Leases and the Indentures and each of the other agreements
and instruments referred to in the Indentures and the Participation Agreements.

            If this Agreement is terminated by the Underwriters in accordance
with the provisions of Sections 4 or 8, the Company and the Guarantor, jointly
and severally, agree to reimburse the Underwriters for all their reasonable
out-of-pocket expenses, including the fees and disbursements of counsel for the
Underwriters.

            Section 7. Indemnification and Contribution. (a) The Company and the
Guarantor, jointly and severally, agree to indemnify and hold harmless each
Underwriter and each person, if any, who controls such Underwriter within the
meaning of either Section 15 of the Securities Act or Section 20 of the Exchange
Act from and against any and all losses, claims, damages and liabilities
(including, without limitation, any legal or other expenses reasonably incurred
by any Underwriter or any such controlling person in connection with defending
or investigating any such action or claim) caused by any untrue statement or
alleged untrue statement of a material fact contained in the Registration
Statements or any amendment thereof, any Preliminary Prospectus Supplement or
the Prospectus (as amended or supplemented if the Company or the Guarantor shall
have furnished any amendments or supplements thereto), or caused by any omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, except
insofar as such losses, claims, damages or liabilities are caused by any such
untrue statement or omission or alleged untrue statement or omission based upon
information relating to any Underwriter furnished in writing to the Guarantor or
the Company by or on behalf of any Underwriter expressly for use therein;
provided that such indemnity with respect to the Prospectus shall not inure to
the benefit of any Underwriter (or any person controlling such Underwriter) from
whom the person asserting any such loss, claim, damage or liability purchased
the Offered Certificates which are the subject thereof if such person was not
sent a copy of the Prospectus at or prior to the confirmation of the sale of
such Offered Certificates to such person in any case where such delivery is
required by the Securities Act and the untrue statement or omission of a
material fact contained in such Preliminary Prospectus Supplement was corrected
in such subsequent Prospectus, unless such
<PAGE>
                                       18


failure to deliver the Prospectus was a result of noncompliance by the Company
and the Guarantor with their delivery requirements set forth in Section 5
hereof.

            (b) Each Underwriter agrees, severally and not jointly, to indemnify
and hold harmless the Company and the Guarantor, each of their directors, each
of their officers who signed the Registration Statements and each person, if
any, who controls the Company or the Guarantor within the meaning of either
Section 15 of the Securities Act or Section 20 of the Exchange Act to the same
extent as the foregoing indemnity from the Company and the Guarantor to such
Underwriter, but only with reference to information relating to such Underwriter
furnished in writing to the Guarantor or the Company by or on behalf of any
Underwriter expressly for use in the Registration Statements, any Preliminary
Prospectus Supplement, the Prospectus or any amendments or supplements thereto.

            (c) In case any proceeding (including any governmental
investigation) shall be instituted involving any person in respect of which
indemnity may be sought pursuant to either of the two preceding paragraphs, such
person (the "indemnified party") shall promptly notify the person against whom
such indemnity may be sought (the "indemnifying party") in writing. An
indemnifying party may participate at its own expense in the defense of such
action. If it so elects within a reasonable time after receipt of such notice,
an indemnifying party, jointly with any other indemnifying parties receiving
such notice, may, except as provided in the immediately following sentence,
assume the defense of such action, with counsel reasonably satisfactory to the
indemnified party to represent the indemnified party and any others the
indemnifying party may designate in such proceeding and shall pay the fees and
disbursements of such counsel related to such proceeding. In any such
proceeding, any indemnified party shall have the right to retain its own
counsel, but the fees and expenses of such counsel shall be at the expense of
such indemnified party unless (i) the indemnifying party and the indemnified
party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the indemnifying party and the indemnified party and representation of both
parties by the same counsel would be inappropriate due to actual or potential
differing interests between them. It is understood that the indemnifying party
shall not, in respect of the legal expenses of any indemnified party in
connection with any proceeding or related proceedings in the same jurisdiction,
be liable for the fees and expenses of more than one separate firm (in addition
to any local counsel) for all such indemnified parties and that all such fees
and expenses shall be reimbursed as they are incurred. Such firm shall be
designated in writing by Salomon Smith Barney Inc., in the case of parties
indemnified pursuant to paragraph (a) above, and by the Company or the
Guarantor, in the case of parties indemnified pursuant to paragraph (b). The
indemnifying party shall not be liable for any settlement of any proceeding
effected without its written consent, but if settled with such consent or if
there be a final judgment for the plaintiff, the indemnifying party agrees to
indemnify the indemnified party from and against any loss or liability by reason
of such settlement or judgment. No indemnifying party shall, without the prior
written consent of the indemnified party, effect any settlement of any pending
or threatened proceeding in respect of which any indemnified party is or could
have been
<PAGE>
                                       19


a party and indemnity could have been sought hereunder by such indemnified
party, unless such settlement includes an unconditional release of such
indemnified party from all liability on claims that are the subject matter of
such proceeding.

            (d) If the indemnification provided for in paragraphs (a) and (b) of
this Section 7 is unavailable to an indemnified party or insufficient in respect
of any losses, claims, damages or liabilities referred to therein, then each
indemnifying party under such paragraph, in lieu of indemnifying such
indemnified party thereunder, shall contribute to the amount paid or payable by
such indemnified party as a result of such losses, claims, damages or
liabilities (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company and the Guarantor on the one hand and the
Underwriters on the other hand from the offering of the Offered Certificates or
(ii) if the allocation provided by clause (i) above is not permitted by
applicable law, in such proportion as is appropriate to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault of
the Company and the Guarantor on the one hand and of the Underwriters on the
other hand in connection with the statements or omissions that resulted in such
losses, claims, damages or liabilities, as well as any other relevant equitable
considerations. The relative benefits received by the Company and the Guarantor
on the one hand and the Underwriters on the other hand in connection with the
offering of the Offered Certificates shall be deemed to be in the same
respective proportions as the net proceeds from the offering of the Offered
Certificates (before deducting expenses) received by the Company and the total
underwriting discounts and commissions received by the Underwriters, in each
case as set forth in the table on the cover of the Prospectus, bear to the
aggregate public offering price of the Offered Certificates. The relative fault
of the Company and the Guarantor on the one hand and of the Underwriters on the
other hand shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
or the Guarantor or by the Underwriters and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission. The Underwriters' respective obligations to contribute
pursuant to this Section 7 are several in proportion to the respective principal
amounts of Offered Certificates they have purchased hereunder, and not joint.

            (e) The Company, the Guarantor and the Underwriters agree that it
would not be just or equitable if contribution pursuant to this Section 7 were
determined by pro rata allocation (even if the Underwriters were treated as one
entity for such purpose) or by any other method of allocation that does not take
account of the equitable considerations referred to in paragraph (d) above. The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages and liabilities referred to in paragraph (d) above shall be
deemed to include, subject to the limitations set forth above, any legal or
other expenses reasonably incurred by such indemnified party in connection with
investigating or defending any such action or claim. Notwithstanding the
provisions of this Section 7, no Underwriter shall be required to contribute any
amount in excess of the amount by which the total price at which the Offered
Certificates underwritten by it and distributed to the public were offered to
the public exceeds the amount of
<PAGE>
                                       20


any damages that such Underwriter has otherwise been required to pay by reason
of such untrue or alleged untrue statement or omission or alleged omission. No
person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation. The remedies provided
for in this Section 7 are not exclusive and shall not limit any rights or
remedies which may otherwise be available to any indemnified party at law or in
equity.

            (f) The indemnity and contribution provisions contained in this
Section 7 and the representations and warranties of the Company or the Guarantor
contained in this Agreement shall remain operative and in full force and effect
regardless of (i) any termination of this Agreement, (ii) any investigation made
by or on behalf of any Underwriter or any person controlling any Underwriter or
by or on behalf of the Guarantor or Company, its officers or directors or any
person controlling the Guarantor or the Company and (iii) acceptance of and
payment for any of the Offered Certificates.

            Section 8. Termination of Agreement. (a) (i) This Agreement shall be
subject to termination in your absolute discretion, by notice given to the
Company, if after the execution and delivery of this Agreement and prior to the
Closing Date (A) trading generally shall have been suspended or materially
limited on the New York Stock Exchange or the Nasdaq National Market, (B)
trading of any securities of the Guarantor or the Company shall have been
suspended on any exchange or in any over-the-counter market, (C) a general
moratorium on commercial banking activities in New York shall have been declared
by either Federal or New York State authorities, or (D) there shall have
occurred any outbreak or escalation of hostilities involving the United States
or any calamity or crisis and (ii) in the case of any of the events specified in
clauses (i)(A) through (D), such event singly or together with any other such
event makes it, in your reasonable judgment, impracticable to market the Offered
Certificates on the terms or in the manner contemplated in the Prospectus or
inadvisable to enforce contracts for the sale of the Offered Certificates.

            (b) If this Agreement is terminated pursuant to this Section, such
termination shall be without liability of any party to any other party, except
to the extent provided in Section 6. Notwithstanding any such termination, the
provisions of Section 7 shall remain in effect.

            (c) This Agreement may also terminate pursuant to the provisions of
Section 4, with the effect stated in such Section.

            Section 9. Default. If, on the Closing Date any one or more of the
Underwriters shall fail or refuse to purchase Offered Certificates that it has
or they have agreed to purchase hereunder on such date, and the aggregate
principal amount of Offered Certificates which such defaulting Underwriter or
Underwriters agreed but failed or refused to purchase is not more than one-tenth
of the aggregate principal amount of the Offered Certificates to be purchased on
such
<PAGE>
                                       21


date, the other Underwriters shall be obligated severally in the proportions
that the principal amount of Offered Certificates specified to be purchased by
them on Schedule II bears to the aggregate principal amount of Offered
Certificates specified to be purchased by all such non-defaulting Underwriters,
or in such other proportions as you may specify, to purchase the Offered
Certificates which such defaulting Underwriter or Underwriters agreed but failed
or refused to purchase on such date; provided that in no event shall the
principal amount of Offered Certificates that any Underwriter has agreed to
purchase pursuant to Section 2 be increased pursuant to this Section 9 by an
amount in excess of one-ninth of such principal amount of Offered Certificates
without the written consent of such Underwriter. If on the Closing Date any
Underwriter or Underwriters shall fail or refuse to purchase Offered
Certificates and the aggregate principal amount of Offered Certificates with
respect to which such default occurs is more than one-tenth of the aggregate
principal amount of Offered Certificates to be purchased on such date, and
arrangements satisfactory to you and the Company for the purchase of such
Offered Certificates are not made within 36 hours after such default, this
Agreement shall terminate without liability on the part of any non-defaulting
Underwriter, the Company or the Guarantor, except that the Company and the
Guarantor will continue to be liable for the payment of expenses for any
non-defaulting Underwriter to the extent set forth in Section 6. In any such
case either you or the Company shall have the right to postpone the Closing
Date, but in no event for longer than seven days, in order that the required
changes, if any, in the Registration Statements and in the Prospectus or in any
other documents or arrangements may be effected. Any action taken under this
paragraph shall not relieve any defaulting Underwriter from liability in respect
of any default of such Underwriter under this Agreement.

            If this Agreement shall be terminated by the Underwriters, or any of
them, because of any failure or refusal on the part of the Guarantor or the
Company to comply with the terms or to fulfill any of the conditions of this
Agreement, or if for any reason the Guarantor or the Company shall be unable to
perform its obligations under this Agreement, the Company will reimburse the
Underwriters or such Underwriters as have so terminated this Agreement with
respect to themselves, severally, for all out-of-pocket expenses (including the
reasonable fees and disbursements of their counsel) reasonably incurred by such
Underwriters in connection with this Agreement or the offering contemplated
hereunder.

            Section 10. Counterparts. This Agreement may be signed in two or
more counterparts, each of which shall be an original, with the same effect as
if the signatures thereto and hereto were upon the same instrument.

            Section 11. Governing Law and Time. This Agreement shall be governed
by and construed in accordance with the internal laws of the State of New York.
Specified times of the day refer to New York City time.

            Section 12. Notices. All notices and other communications hereunder
shall be in writing and shall be deemed to have been duly given if delivered,
mailed, or transmitted by any
<PAGE>
                                       22


standard form of telecommunication, including telex or facsimile transmission.
Notices to the Underwriters shall be directed to Salomon Smith Barney Inc.,
Seven World Trade Center, New York, New York 10048, Telephone No.: 212-783-8540,
Facsimile No.: 212-783-2274, Attention: Mark Rhodes. Notices to the Company
shall be directed to it by mail at Northwest Airlines, Inc., 5101 Northwest
Drive, St. Paul, Minnesota 55111, with a copy to Northwest Airlines Corporation
at the same address, attention of the Senior Vice President-Finance and
Treasurer, or by delivery to the Company and the Guarantor at 2700 Lone Oak
Parkway, Eagan, Minnesota 55121, attention of Vice President-Finance and
Treasurer.

            Section 13. Parties. This Agreement is made solely for the benefit
of the Underwriters, the Company, the Guarantor and, to the extent expressed,
any person controlling the Company, the Guarantor or the Underwriters within the
meaning of Section 15 of the Securities Act, and their respective executors,
administrators, successors and assigns and no other person shall acquire or have
any right under or by virtue of this Agreement. The term "successors and
assigns" shall not include any purchaser, as such purchaser, from the
Underwriters of the Offered Certificates.

            Section 14. Headings. The headings of the sections of this Agreement
have been inserted for convenience of reference only and shall not be deemed a
part of this Agreement.

                         ------------------------------
<PAGE>
                                       23


            If the foregoing is in accordance with your understanding of our
agreement, please sign and return to us a counterpart hereof, whereupon this
instrument will become a binding agreement among the Company, the Guarantor and
each Underwriter in accordance with its terms.

                                        Very truly yours,

                                        NORTHWEST AIRLINES, INC.

                                        By: /s/ Daniel B. Matthews
                                            ------------------------------------
                                            Name: Daniel B. Matthews
                                            Title: Vice President & Assistant
                                                   Treasurer


                                        NORTHWEST AIRLINES CORPORATION

                                        By: /s/ Daniel B. Matthews
                                            ------------------------------------
                                            Name: Daniel B. Matthews
                                            Title: Vice President & Assistant
                                                   Treasurer

Accepted as of the date first above written:

Salomon Smith Barney Inc.
Credit Suisse First Boston Corporation
ABN AMRO Incorporated
Credit Lyonnais Securities (U.S.A.)  Inc.
Deutsche Bank Securities Inc.

By: SALOMON SMITH BARNEY INC.


By: /s/ Gregory P. Lee
    -------------------------------------
    Name: Gregory P. Lee
    Title: Vice President
<PAGE>

                                   EXHIBIT A-1

                               Form of Opinion of
                           Simpson Thacher & Bartlett

            (i) NWA Corp. has been duly incorporated and is validly existing and
in good standing as a corporation under the laws of the State of Delaware and
has full corporate power and authority to conduct its business as described in
the Registration Statements and the Prospectus.

            (ii) The PT Agreement, the Supplemental Agreement and each Pass
Through Trust Agreement have been duly authorized, executed and delivered by NWA
Corp. and constitute valid and legally binding obligations of NWA Corp., the
Company and the Trustee enforceable against NWA Corp., the Company and the
Trustee in accordance with their terms.

            (iii) The Basic Agreement has been duly qualified under the Trust
Indenture Act of 1939, as amended (the "Trust Indenture Act").

            (iv) Assuming the Certificates have been duly authorized, executed,
authenticated and issued by the Trustee, upon payment and delivery therefor in
accordance with the Underwriting Agreement, the Certificates will constitute
valid and legally binding obligations of the Trustee enforceable against the
Trustee in accordance with their terms and entitled to the benefits of the
Applicable Pass Through Trust Agreement.

            (v) No consent, approval, authorization, order, registration or
qualification of or with any federal or New York governmental agency or body or
any Delaware government agency or body acting pursuant to the Delaware General
Corporation Law or, to our knowledge, any federal or New York court or any
Delaware court acting pursuant to the Delaware General Corporation Law is
required for the valid authorization, issuance and delivery of the Certificates,
the valid authorization, execution and delivery by the Company or NWA Corp. of,
and the performance by the Company, and NWA Corp. of their respective
obligations under, the Basic Agreement, the Supplemental Agreement, the Pass
Through Trust Agreements, the Note Purchase Agreement and the Underwriting
Agreement, except such as have been obtained and made under the Act and Trust
Indenture Act and such as may be required under state securities laws of the
Federal Aviation Act of 1958, as amended (the "Federal Aviation Act").

            (vi) Although we are not aware of any judicial authority, none of
the Trusts is required to be registered under the Investment Company Act of
1940, as amended (the "Investment Company Act"). None of NWA Corp. or the
Company is an "investment company" within the meaning of and subject to
regulation under the Investment Company Act.

            (vii) Each of the Escrow Agreements and the Note Purchase Agreement
is a valid and binding obligation of the Paying Agent and the Trustee that is a
party thereto
<PAGE>
                                      A-1-2


enforceable against such Paying Agent and Trustee in accordance with its terms.
The Note Purchase Agreement is a valid and binding obligation of the Company,
enforceable against the Company in accordance with its terms.

            (viii) Each of the Escrow Agreements creates a valid escrow under
New York law and a valid equitable interest in the escrowed property in favor of
the corresponding Trustee. Neither a New York court nor a United States federal
court applying New York law or the Bankruptcy Code (in the case of a holder of
an Escrow Receipt that is eligible for relief under Section 109 of the
Bankruptcy Code), if properly presented with the issue and after having properly
considered such issue, would permit any holder of an Escrow Receipt to terminate
the related Escrow Agreement, except in accordance with its terms.

            (ix) So long as an Escrow Agreement has not been terminated and
whether or not any insolvency proceeding has been commenced, creditors of any
person that is a holder of an Escrow Receipt issued under the Escrow Agreement,
a receiver, liquidator, or holder of a lien against the assets of any such
person, and any trustee in bankruptcy of such person (if the person is eligible
for relief under Section 109 of the Bankruptcy Code) (collectively, the
"Creditors") may acquire valid claims or liens, as to the Deposits established
under the Deposit Agreement and as to the related Deposit Agreement and Escrow
Agreement, only against the rights of the holder of the Escrow Receipt under the
Escrow Agreement and do not have, and may not through the enforcement of such
Creditors' rights acquire, any greater right than the holder of the Escrow
Receipt with respect to the Deposits, Deposit Agreement or Escrow Agreement.

            (x) No creditor of NWA Corp. or any of its subsidiaries, and no
holder of a lien against the assets of any such person, such as trustees,
receivers or liquidators (whether or not any insolvency proceeding has been
commenced), may acquire valid claims or liens as to the Deposits and the related
Deposit Agreements and Escrow Agreements.

            (xi) The Intercreditor Agreement, the Liquidity Facilities and the
Note Purchase Agreement constitute valid and legally binding obligations of the
Subordination Agent, enforceable against the Subordination Agent in accordance
with its terms. The Intercreditor Agreement constitutes a valid and legally
binding obligation of each Trustee, enforceable against such Trustee in
accordance with its terms.

            (xii) Except as disclosed in the Prospectus, and to our knowledge,
there are no pending or threatened actions, suits or proceedings against NWA
Corp. or any of its subsidiaries that are required to be disclosed in the
Registration Statement or the Prospectus that are not so disclosed.

            (xiii) Each of the Registration Statements has become effective
under the Act, the Prospectus has been filed in accordance with Rule 424(b) of
the rules and regulations of the Commission under the Act and, to our knowledge,
no stop order suspending the effectiveness of
<PAGE>
                                    A-1-3


either Registration Statement has been issued and no proceedings for that
purpose have been instituted or threatened by the Commission.

            (xiv) The statements made in the Registration Statements and the
Prospectus under the captions "Description of the Certificates", "Description of
the Deposit Agreements", "Description of the Escrow Agreements", "Description of
the Liquidity Facilities", "Description of the Intercreditor Agreement" and
"Description of the Equipment Notes" (other than the statements made under the
sub-caption "The Leases" about which we express no opinion), insofar as they
purport to constitute summaries of certain terms of documents referred to
therein, constitute accurate summaries of the terms of such documents in all
material respects.

            (xv) The statements made in the Second Registration Statement and
the Prospectus under the caption "ERISA Considerations", insofar as such
statements purport to summarize certain legal matters referred to therein,
constitute accurate summaries thereof in all material respects.

            (xvi) The Underwriting Agreement has been duly authorized, executed
and delivered by NWA Corp.

            (xvii) Each of the Escrow Agreements, the Deposit Agreements and the
Note Purchase Agreement is a valid and binding obligation of the Escrow Agent
enforceable against the Escrow Agent in accordance with its terms.

            (xviii) Assuming the Escrow Receipts applicable to an Escrow
Agreement have been duly authorized, executed and issued by the Escrow Agent,
upon delivery to the Depositary on behalf of the Escrow Agent of the initial
escrow amount specified in such Escrow Agreement, such Escrow Receipts will be
entitled to the benefits of such Escrow Agreement.

            Such counsel may state that its opinion as set forth in paragraphs
(ii), (iv), (vii), (xi), (xvii) and (xviii) are subject to the effects of
bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium or
similar laws affecting creditors' rights generally, general equitable principles
(whether considered in a proceeding in equity or at law) and an implied covenant
of good faith and fair dealing. In addition such counsel shall also state that
they have not independently verified the accuracy, completeness or fairness of
the statements made or included in the Second Registration Statement, the
Prospectus or (i) the Annual Report on Form 10-K of the Guarantor for the fiscal
year ended December 31, 1998, (ii) the Quarterly Report on Form 10- Q of the
Guarantor for the fiscal quarter ended March 31, 1999 and (iii) the Current
Reports on Form 8-K of the Guarantor, dated January 22, 1999, February 24, 1999
and April 19, 1999 (collectively, the "Exchange Act Documents") and take no
responsibility therefor, except as and to the extent set forth in paragraphs
(viii) and (ix) above, and in the course of the preparation by the Company and
the Guarantor of the Second Registration Statement and the Prospectus (excluding
the Exchange Act Documents), such counsel participated in conferences with
certain
<PAGE>
                                    A-1-4


officers and employees of the Company and the Guarantor, with representatives of
the independent public accountants for the Company and the Guarantor and with
counsel to the Company and the Guarantor. Such counsel may state that they did
not prepare the Exchange Act Documents, however, such counsel discussed the
Exchange Act Documents with the Company and the Guarantor and with counsel to
the Company and the Guarantor prior to their filing with the Commission, and,
based upon such counsel's examination of the Registration Statements, the
Prospectus and the Exchange Act Documents, such counsel's investigations made in
connection with the preparation of Registration Statements and the Prospectus
(excluding the Exchange Act Documents) and such counsel's participation in the
conferences referred to above, (i) such counsel is of the opinion that the
Second Registration Statement, as of its effective date, and the Prospectus
(excluding the Exchange Act Documents), as of June , 1999, complied as to form
in all material respects with the requirements of the Securities Act, the Trust
Indenture Act and the applicable rules and regulations of the Commission
thereunder and that the Exchange Act Documents complied as to form when filed in
all material respects with the requirements of the Exchange Act and the
applicable rules and regulations of the Commission thereunder, except that in
each case such counsel may state that it expresses no opinion with respect to
the financial statements or other financial data contained or incorporated by
reference in the Second Registration Statement, the Prospectus or the Exchange
Act Documents, and (ii) such counsel has no reason to believe that the Second
Registration Statement, at the time such Second Registration Statement became
effective (including the Exchange Act Documents on file with the Commission on
such effective date) contained an untrue statement of a material fact or omitted
to state a material fact required to be stated therein or necessary in order to
make the statements therein not misleading or that the Prospectus (including the
Exchange Act Documents) as of June       , 1999, or as of the Closing Date
contains an untrue statement of a material fact or omits to state a material
fact necessary in order to make the statements therein, in the light of the
circumstances under which they were made, not misleading, except that in each
case such counsel may state that it expresses no belief with respect to the
financial statements and other financial data contained or incorporated by
reference in the Second Registration Statement, the Prospectus or the Exchange
Act Documents.

            Insofar as the opinions expressed by such counsel relate to or are
dependent upon matters governed by the laws of the State of Minnesota, such
counsel may state that it has relied upon the opinion of the Office of the
General Counsel of the Company, delivered to you concurrently with such
counsel's opinion.
<PAGE>

                                   EXHIBIT A-2

                               Form of Opinion of
                          Cadwalader, Wickersham & Taft

            (i) The statements set forth under "Description of Equipment Notes
- -- The Leases and Certain Provisions of the Owned Aircraft Indentures" in the
Prospectus Supplement, insofar as they purport to constitute summaries of
certain terms of the Form Aircraft Financing Documents referred to in such
caption, constitute accurate summaries of such terms of the Form Aircraft
Financing Documents in all material respects.

            (ii) The statements set forth under "Description of the Equipment
Notes -- Remedies" in the Prospectus Supplement, insofar as such statements
purport to summarize provisions of Section 1110 of the Bankruptcy Code, provide
a fair summary of such provisions.

            (iii) The statements made in the Prospectus Supplement under the
caption "Certain U.S. Federal Income Tax Consequences", insofar as such
statements purport to summarize certain legal matters referred to therein,
constitute accurate summaries thereof in all material respects.

            (iv) The Trust created by each Applicable Pass Through Trust
Agreement will not be classified as an association or a publicly traded
partnership taxable as a corporation for federal income tax purposes and will
not be subject to federal income tax.
<PAGE>

                                    EXHIBIT B

                     Form of Opinion of the General Counsel
                        of the Guarantor and the Company

            (i) The Company has been duly incorporated, is validly existing and
in good standing under the laws of the State of Minnesota with corporate power
and corporate authority under such laws to own, lease and operate its properties
and conduct its business as described in the Prospectus and to perform its
obligations under the Underwriting Agreement, the Pass Through Agreements and
the Operative Documents to which the Company is, or is to be, a party.

            (ii) The Company is duly qualified to transact business as a foreign
corporation and is in good standing in each other jurisdiction in which it owns
or leases property of a nature, or transacts business of a type, that would make
such qualification necessary, except where the failure to so qualify or be in
good standing would not have a Material Adverse Effect.

            (iii) The Guarantor is duly qualified to transact business as a
foreign corporation and is in good standing in the State of Minnesota.

            (iv) The Company is a "citizen of the United States" (as defined in
Section 40102(a)(15) of Title 49 of the United States Code) and is an air
carrier operating under a certificate issued by the Secretary of Transportation
pursuant to Chapter 447 of Title 49, United States Code, for aircraft capable of
carrying 10 or more individuals or 6,000 pounds or more of cargo; there is in
force with respect to the Company an air carrier operating certificate issued
pursuant to Part 121 of the regulations under the Federal Aviation Act; all of
the outstanding shares of capital stock of the Company have been duly authorized
and validly issued and are fully paid and non-assessable and are owned by the
Guarantor, indirectly through Northwest Airlines Holdings Corporation and NWA
Inc., each a Delaware corporation, free and clear of any pledge, lien, security
interest, charge, claim, equity or encumbrance of any kind.

            (v) To my knowledge, except as disclosed in the Exchange Act
Documents, there are no statutes or regulations, or any pending or threatened
legal or governmental proceedings, required to be described in the Prospectus
that are not described as required, nor any contracts or documents of a
character required to be described or referred to in the Registration Statements
or the Prospectus or to be filed as exhibits to the Registration Statements that
are not described, referred to or filed as required.

            (vi) The execution and delivery by the Guarantor and/or the Company,
as the case may be, of the Underwriting Agreement and the Operative Documents to
which each, as the case may be, is a party, the issuance and sale of the Offered
Certificates, the issuance of the Escrow Receipts attached to the Offered
Certificates, the consummation by the Guarantor and/or the Company of the
transactions contemplated therein and compliance by the Guarantor and/or the
Company, as the case may be, with the terms thereof, do not and will not result
in any
<PAGE>
                                     B-2


violation of the charter or by-laws of the Guarantor or the Company, and do not
and will not result in a breach of any of the terms or provisions of, or
constitute a default under, or result in the creation or imposition of any lien,
charge or encumbrance (except for Permitted Liens) upon any property or assets
of the Guarantor or the Company under (A) any indenture, mortgage, loan
agreement, note, lease or other agreement or instrument included or incorporated
by reference as an exhibit to the Exchange Act Documents (except for such
breaches, defaults, liens, charges or encumbrances that would not have a
Material Adverse Effect) or included as an exhibit to the Registration
Statements (except for such breaches, defaults, liens, charges or encumbrances
that would not have a Material Adverse Effect), (B) any existing law, rule or
regulation of the State of Minnesota or the United States of America applicable
to the Guarantor or the Company (other than the securities or Blue Sky laws of
the State of Minnesota, as to which laws I express no opinion), or (C) any
judgment, order or decree of any government, governmental instrumentality or
court, domestic or foreign, known to me and having jurisdiction over the
Guarantor or the Company or any of their respective properties.

            (vii) Under any provision of law or regulation applicable to the
Company or the Guarantor of the State of Minnesota or the United States of
America, no authorization, approval, consent, order or license of or filing with
or notice to any governmental agency or body or any court is required for the
valid authorization, issuance and delivery of the Offered Certificates, the
issuance of the Escrow Receipts attached to the Offered Certificates, the valid
authorization, execution and delivery by the Guarantor or the Company of, and
the performance by the Company and the Guarantor of their respective obligations
under, the Underwriting Agreement and the Operative Documents, except such as
are required under the securities or Blue Sky laws of the State of Minnesota.

            (viii) The Underwriting Agreement has been duly authorized, executed
and delivered by the Company.

            (ix) The Exchange Act Documents (except for the financial statements
and schedules and other financial data included or incorporated by reference
therein or omitted therefrom, as to which I express no opinion), as of the dates
they were filed with the Commission, complied as to form in all material
respects with the requirements of the Exchange Act.

            In addition, counsel shall state that such counsel or lawyers on his
staff have participated in the preparation of the Registration Statements, the
Prospectus and the Exchange Act Documents and have participated in conferences
with certain officers and employees of the Company and the Guarantor, counsel
employed by the Company and the Guarantor, representatives of the independent
public accountants for the Company and the Guarantor, representatives of the
Underwriters and counsel for the Underwriters, at which conferences the contents
of the Registration Statements and Prospectus and related matters were
discussed. Such counsel shall also state that, although such counsel is not
passing upon and does not assume any responsibility for the accuracy,
completeness or fairness of the statements contained in the
<PAGE>
                                     B-3


Registration Statements, the Prospectus or the Exchange Act Documents and has
not made any independent check or verification thereof, on the basis of the
participation of such counsel or lawyers on his staff in the conferences
referred to above and their examination of the Registration Statements, the
Prospectus and the Exchange Act Documents, nothing has come to such counsel's
attention that leads him to believe that the Registration Statement, as of the
effective date hereof (including the Exchange Act Documents on file with the
Commission on such effective date) contained an untrue statement of a material
fact or omitted to state a material fact required to be stated therein or
necessary to make the statements therein not misleading, or the Prospectus
(including the Exchange Act Documents) as of its date or at the Closing Date
contained or contains an untrue statement of a material fact or omitted or omits
to state a material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading,
except that such counsel need express no opinion with respect to the financial
statements, schedules and other financial data included or incorporated or
deemed to be incorporated by reference in the Registration Statements or
Prospectus or with respect to the Statement of Qualification on Form T-1.
<PAGE>

                                    EXHIBIT C

                               Form of Opinion of
                                Bingham Dana LLP

            (i) State Street is a Massachusetts trust company, validly formed
and authorized to operate as a state-chartered trust company under the laws of
the Commonwealth of Massachusetts and, in its individual capacity or as Pass
Through Trustee, Subordination Agent or Paying Agent, as the case may be, has
the requisite corporate and trust power and authority to execute, deliver and
perform its obligations under the Operative Documents to which it is a party
and, in its capacity as Pass Through Trustee, to issue and execute the
Certificates delivered on the date hereof.

            (ii) State Street, in its individual capacity or as Pass Through
Trustee, Subordination Agent or Paying Agent, as the case may be, has duly
authorized the Operative Documents to which it is a party, and has duly executed
and delivered the Operative Documents to which it is a party, which constitute
valid and binding obligations of State Street, in its individual capacity or as
Pass Through Trustee, Subordination Agent or Paying Agent, as the case may be,
enforceable against State Street, in its individual capacity or as Pass Through
Trustee, Subordination Agent or Paying Agent, as the case may be, in accordance
with their respective terms.

            (iii) The Certificates issued on the date hereof have been duly
authorized and validly executed, authenticated, issued and delivered by State
Street, in its capacity as Pass Through Trustee, pursuant to the Pass Through
Trusts, and such Certificates constitute valid and binding obligations of State
Street, in its capacity as Pass Through Trustee, enforceable against State
Street, as Pass Through Trustee, in accordance with their respective terms and
holders of such Certificates are entitled to the benefits of the Pass Through
Trusts.

            (iv) The authorization, execution, delivery and performance by State
Street, in its individual capacity or as Pass Through Trustee, Subordination
Agent or Paying Agent, as the case may be, of the Operative Documents to which
it is a party and the consummation of the transactions therein contemplated and
compliance with the terms thereof and issuance on the date hereof of the
Certificates under the Pass Through Trusts do not and will not result in the
violation of the provisions of the charter documents or by-laws of State Street
and, to the best of our knowledge, do not conflict with, or result in a breach
of any terms or provisions of, or constitute a default under, or result in the
creation or the imposition of any lien, charge or encumbrance upon any property
or assets of State Street under any indenture, mortgage or other agreement or
instrument, in each case known to us, to which State Street is a party or by
which it is bound, or violates any applicable Massachusetts or federal law, rule
or regulation governing State Street's banking or trust powers, or, to the best
of our knowledge, of any judgment, order or decree, in each case known to us,
applicable to State Street of any court, regulatory body, administrative agency,
government or governmental body having jurisdiction over State Street.
<PAGE>
                                    C-2


            (v) No authorization, approval, consent, license or order of, giving
of notice to, registration with, or taking of any other action in respect of,
any federal or state governmental authority or agency pursuant to any federal or
Massachusetts law governing the banking or trust powers of State Street is
required for the authorization, execution, delivery and performance by State
Street, in its individual capacity or as Pass Through Trustee, Subordination
Agent or Paying Agent, as the case may be, of the Operative Documents to which
it is a party or the consummation of any of the transactions by State Street, in
its individual capacity or as Pass Through Trustee, Subordination Agent or
Paying Agent, as the case may be, contemplated thereby or the issuance of the
Certificates on the date hereof under the Pass Through Trusts (except as shall
have been duly obtained, given or taken); and such authorization, execution,
delivery, performance, consummation and issuance do not conflict with or result
in a breach of any such law.

            (vi) There are no taxes, fees or other governmental charges payable
under the laws of the Commonwealth of Massachusetts or any political subdivision
of such state in connection with the execution and delivery by State Street, in
its individual capacity or as Pass Through Trustee, Subordination Agent or
Paying Agent, as the case may be, of the Operative Documents (except for taxes
on any fees payable to State Street in its individual capacity) or in connection
with the issuance, execution and delivery of the Certificates issued on the date
hereof by State Street, as Pass Through Trustee, pursuant to the Pass Through
Trusts (except for taxes on any fees payable to State Street in its individual
capacity), and there are no taxes, fees or other governmental charges payable by
the Subordination Agent imposed by the Commonwealth of Massachusetts or any
political subdivision of such state in connection with the acquisition,
possession or ownership by the Subordination Agent of any of the Equipment Notes
(except for taxes on any fees payable to State Street in its individual
capacity).

            (vii) The statements in the June , 1999 Prospectus Supplement to the
Northwest Airlines, Inc. Prospectus dated June 7, 1999 under the caption
"Certain Connecticut Taxes" to the extent that they constitute matters of law or
legal conclusions with respect thereto, have been reviewed by us and are correct
in all material respects.

            (viii) To our knowledge, but without having investigated any
governmental records or court dockets, and without having made any other
independent investigation, there are no proceedings pending or overtly
threatened in writing against or affecting State Street in any court or before
any governmental authority, agency, arbitration board or tribunal which, if
adversely determined, individually or in the aggregate, could reasonably be
expected to affect materially and adversely the Pass Through Trusts or affect
the right, power and authority of State Street, in its individual capacity or as
Pass Through Trustee, Subordination Agent or the Paying Agent, as the case may
be, to enter into or perform its obligations under the Operative Documents to
which it is a party or to issue the Certificates on the date hereof.
<PAGE>

                                    EXHIBIT D

                               Form of Opinion of
                             Ray, Quinney & Nebeker

            1. The Escrow Agent is a national banking association duly organized
and validly existing in good standing under the laws of the United States and
has the full corporate power, authority and legal right under the laws of the
United States of America pertaining to its banking, trust and fiduciary powers
to conduct its business and operations as currently conducted and to enter into,
execute and deliver the Operative Documents (as defined in the Underwriting
Agreement) to which the Escrow Agent is a party (the "Transaction Documents")
and the Escrow Receipts and perform its obligations thereunder.

            2. The execution, delivery and performance by the Escrow Agent of
the Transaction Documents and the Escrow Receipts, the consummation by the
Escrow Agent of the transactions contemplated thereby and compliance by the
Escrow Agent with the terms thereof (i) have been duly authorized by all
necessary corporate action on the part of the Escrow Agent and do not require
any stockholder approval or consent of any trustee or holder of any indebtedness
or obligations of the Escrow Agent, (ii) do not and will not contravene, or
result in a breach of or constitute any default under its charter documents or
by-laws, or the provisions of any indenture, mortgage, contract or other
agreement known to us, to which it is party or by which it or any of its
properties is or may be bound or affected and (iii) does not and will not
contravene any law or governmental rule or regulation of the United States of
America or the State of Utah, or any order, judgment, injunction or decree known
to us and applicable to or binding on the Escrow Agent or by which any of its
properties is bound, or require the consent or approval of, the giving of notice
to, or the registration with, or the taking of any action in respect of, or
under, the laws of the United States of America or the laws of the State of Utah
or any subdivision or agency thereof.

            3. Each of the Transaction Documents and the Escrow Receipts has
been duly executed and delivered by the Escrow Agent and assuming that each such
agreement is the legal, valid and binding obligation of each other party
thereto, is the legal, valid and binding obligation of the Escrow Agent,
enforceable against the Escrow Agent in accordance with its terms.

            4. To our knowledge, there are no pending or threatened actions,
suits, investigations or proceedings (whether or not purportedly on behalf of
the Escrow Agent) against or affecting the Escrow Agent or any of its property
before or by any court or administrative agency which, individually or in the
aggregate, if adversely determined, (A) would adversely affect the ability of
the Escrow Agent to perform its obligations under any of the Transaction
Documents or the Escrow Receipts or (B) would call into question or challenge
the validity of the Transaction Documents or the Escrow Receipts or the
enforceability thereof.
<PAGE>

                                    EXHIBIT E

                               Form of Opinion of
                         Milbank, Tweed, Hadley & McCloy

            (1) Each Relevant Document constitutes the legal, valid and binding
obligation of Citibank, enforceable against Citibank in accordance with its
terms, except as may be limited by bankruptcy, conservatorship, receivership,
insolvency, reorganization, moratorium, fraudulent conveyance or transfer or
other similar laws relating to or affecting the rights of creditors of national
banking associations generally and except as the enforceability of such Relevant
Document is subject to the application of general principles of equity
(regardless of whether considered in a proceeding in equity or at law),
including, without limitation, (a) the possible unavailability of specific
performance, injunctive relief or any other equitable remedy and (b) concepts of
materiality, reasonableness, good faith and fair dealing; and

            (2) The payment obligations of Citibank under each Liquidity
Agreement rank at least pari passu in right of payment with all other unsecured
and unsubordinated obligations of Citibank (other than those obligations
preferred by mandatory operation of law and with the exception of any rights of
set-off or counterclaim which may be asserted against Citibank).
<PAGE>

                                   EXHIBIT F-1

                               Form of Opinion of
                                 Clifford Chance

            (i) ABN AMRO Bank N.V. is duly registered with the Commercial
Register of the Amsterdam Chamber of Commerce as (i) a public company with
limited liability (naamloze vennootschap), (ii) incorporated on 29 March 1824
and (iii) validly existing under the laws of The Netherlands and has the
corporate power under the laws of The Netherlands to enter into the Transaction
Documents and to perform its obligations thereunder through its Chicago Branch.

            (ii) The execution, delivery and performance of the Transaction
Documents by the Chicago Branch of ABN AMRO Bank N.V. have been duly authorized
by all necessary corporate action on the part of ABN AMRO Bank N.V. and do not
contravene any provision of applicable law or regulation in The Netherlands or
of the Articles of Association and no further authorization by or any corporate
action of ABN AMRO Bank N.V. is required in connection with the execution,
delivery and performance by it of the Transaction Documents.

            (iii) Assuming the Transaction Documents constitute legal, valid and
binding obligations under the laws of the State of New York, and assuming due
authorization, execution and delivery thereof by all other parties to such
Transaction Documents, the Transaction Documents, when executed and delivered by
Claudia C. Heldring and Carla Waggoner of the Chicago Branch of ABN AMRO Bank
N.V., will constitute legal, valid and binding obligations of ABN AMRO Bank N.V.
enforceable against ABN AMRO Bank N.V. in accordance with their terms, except as
such enforceability may be limited by bankruptcy, insolvency, liquidation,
reorganization, moratorium or other similar laws affecting the rights of
creditors against ABN AMRO Bank N.V. generally, as the same may be applied in
the event of bankruptcy, insolvency, liquidation or reorganization of, or other
similar occurrence with respect to, ABN AMRO Bank N.V. or in the event of a
moratorium or similar occurrence affecting ABN AMRO Bank N.V., and subject to
the provisions of Chapter X of the Act on the Supervision of the Credit System
1992 (Wet Toezicht Kredietwezen 1992) regarding emergency measures for credit
institutions in The Netherlands.

            (iv) No consent, approval, authorization or order of, or filing with
any governmental authority or body or any court in The Netherlands is required
as a condition to the enforceability of ABN AMRO Bank N.V.'s obligations under
the Transaction Documents.

            (v) The courts of The Netherlands will observe and give effect to
the choice of the laws of the State of New York as the laws governing the
Transaction Documents in any proceedings in relation thereto on the basis and
within the scope of and subject to the limitations imposed by the 1980 Rome
Convention on the Law Applicable to Contractual Obligations (the "Rome
Convention").
<PAGE>
                                    F-1-2


            With the express reservation that as Dutch lawyers we are not
qualified to assess the exact meaning and consequences of the terms of the
Transaction Documents under the laws of the State of New York, on the face of
such document we are not aware of any provision that is likely to be manifestly
incompatible with Netherlands' public policy (a limitation on the chosen law
arising under article 16 Rome Convention) or that is likely to give rise to
situations where mandatory rules of Netherlands' law will prevail over the
chosen law of such document (a limitation on the chosen law arising under
article 7 Rome Convention). It should also be noted that we are not aware of any
published order, ruling or decision of a Netherlands' court, in which such a
court has given overriding effect to foreign mandatory rules pertaining to a law
other than the chosen (or applicable) law or Netherlands' law (a limitation on
the chosen law arising under article 7(1) Rome Convention) in commercial or
financial litigation brought before such courts.

            (vi) In the absence of an applicable treaty or convention providing
for the recognition and enforcement of judgments in civil and commercial matters
which is binding in The Netherlands, a judgment rendered by a foreign court
against ABN AMRO Bank N.V. will not be recognized and enforced by the courts of
The Netherlands and in order to obtain a judgment that is enforceable against
ABN AMRO Bank N.V., it will be necessary to relitigate the matter before the
competent court of The Netherlands and to submit the judgment rendered by the
foreign court in the course of such proceedings, in which case the Netherlands'
court may give such effect to the foreign judgment as it deems appropriate.
There are no treaties between The Netherlands and the United States of America
on the recognition and enforcement of civil or commercial judgments. However,
according to current practice, based upon case law, Netherlands' courts will in
all probability recognize, give "res judicata" to and render a judgment in
accordance with a foreign judgment if and to the extent that the following
conditions are met:

            (a) the foreign court rendering the judgment has jurisdiction over
      the matter on internationally acceptable grounds (e.g. if the parties have
      agreed, for example in a contract, to submit their disputes to the foreign
      court) and has conducted the proceedings in accordance with generally
      accepted principles of fair trial (e.g. after proper service of process);

            (b) the foreign judgment is final and definite; and

            (c) such recognition is not in conflict with Netherlands' public
      policy (i.e. a fundamental principle of Dutch law) or an existing
      Netherlands' judgment.

            (vii) Assuming that under the laws of the State of New York to which
they are expressed to be subject, and any other relevant laws (other than those
of The Netherlands) the Transaction Documents constitute general unsecured and
unsubordinated obligations of ABN AMRO Bank N.V., the payment obligations of ABN
AMRO Bank N.V. under the Transaction Documents rank at least pari passu with all
other unsecured and unsubordinated obligations of ABN AMRO Bank N.V. (other than
those obligations preferred by mandatory operation of law
<PAGE>
                                    F-1-3


and the exception of any rights of set-off or counter-claim which may be
asserted against ABN AMRO Bank N.V.).

            (viii) Under the laws of The Netherlands, the submission to the
jurisdiction of the courts of the State of New York, the courts of the United
States of America for the Southern District of New York and the appellate
courts, contained in Section 14 of the Indemnity Agreement constitutes an
effective submission by ABN AMRO Bank N.V. to the jurisdiction of such courts.

            (ix) Payments of interest and principal in respect of the Deposits
may be made free of withholding or deduction for or on account of any taxes of
whatsoever nature imposed, levied, withheld, or assessed by The Netherlands or
any political subdivision or taxing authority thereof or therein.
<PAGE>

                                   EXHIBIT F-2

              Form of Opinion of Vedder, Price, Kaufman & Kammholz
                       as U.S. counsel for the Depositary

            (i) Each of the Deposit Agreements constitutes the legal, valid and
binding obligation of ABN AMRO enforceable against it in accordance with its
terms, except as such enforcability is limited by (i) bankruptcy, receivership,
conservatorship, insolvency, fraudulent transfer, liquidation, reorganization,
moratorium or other laws affecting creditors' rights and remedies generally from
time to time in effect as the same may be applied in the event of the
bankruptcy, receivership, conservatorship, insolvency, moratorium, liquidation,
reorganization or similar situation of any such party, or other similar
occurrence with respect to any such party or by laws affecting the rights of
creditors or depository institutions, (ii) the possible judicial application of
foreign laws or governmental action affecting creditors' rights generally, (iii)
general principles of equity (regardless of whether such enforceability is
considered in a proceeding in equity or at law), public policy and applicable
law relating to fiduciary duties, and (iv) any implied covenant of good faith
and fair dealing.

            (ii) ABN AMRO Bank N.V. is licensed by the Office of Banks and Real
Estate of the State of Illinois to maintain its branch at 135 LaSalle Street,
Chicago, Illinois (the "Branch"), in accordance with the banking law of the
State of Illinois and the Branch has the full power, authority and legal right
to execute and deliver the Deposit Agreements.

            (iii) The execution, delivery and performance by ABN AMRO of the
Deposit Agreements, and the consummation of the transactions contemplated
therein do not violate any banking law, or any governmental rule or regulation
relating thereto, of the United States of America, the State of Illinois or the
State of New York.

            (iv) No authorization, consent, approval or other action by, and no
notice to or filing with, any banking authority or regulatory body of the United
States of America, the State of Illinois or the State of New York is required
for the due execution, delivery and performance by ABN AMRO of the Deposit
Agreements other than administrative and ministerial filings which ABN AMRO is
obligated to make in the ordinary course of its business (which filings we have
assumed have been and will continue to be made in a timely manner).

            (v) The payment obligations of ABN AMRO under the Deposit Agreements
constitute unsecured and unsubordinated obligations of ABN AMRO.
<PAGE>

                                   SCHEDULE I

                    Pass Through Certificates, Series 1999-2

 Pass Through           Aggregate                                    Final
  Certificate           Principal            Interest            Distribution
  Designation            Amounts               Rate                  Date
  -----------         ------------           --------          -----------------
    1999-2A           $343,254,000            7.575%             March 1, 2019
    1999-2B           $109,858,000            7.950%             March 1, 2015
    1999-2C           $102,122,000            8.304%           September 1, 2010
<PAGE>

                                   SCHEDULE II

                    Pass Through Certificates, Series 1999-2

<TABLE>
<CAPTION>
                             Credit Suisse                     Credit Lyonnais
            Salomon Smith    First Boston     ABN AMRO         Securities (USA)   Deutsche Bank
            Barney Inc.      Corporation      Incorporated     Inc.               Securities Inc.
<S>         <C>              <C>              <C>              <C>                <C>
1999-2A     $ 68,650,800     $ 68,650,800     $ 68,650,800     $ 68,650,800       $ 68,650,800
1999-2B     $ 21,971,600     $ 21,971,600     $ 21,971,600     $ 21,971,600       $ 21,971,600
1999-2C     $ 20,424,400     $ 20,424,400     $ 20,424,400     $ 20,424,400       $ 20,424,400
Total       $111,046,800     $111,046,800     $111,046,800     $111,046,800       $111,046,800
</TABLE>
<PAGE>

                                  SCHEDULE III

                            NORTHWEST AIRLINES, INC.

Underwriting fees,
discounts, commissions
or other compensation:             $4,719,489



                         NORTHWEST AIRLINES CORPORATION

                            NORTHWEST AIRLINES, INC.

                                       and

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION

                                   as Trustee

                          PASS THROUGH TRUST AGREEMENT

                            Dated as of June 3, 1999

<PAGE>

Reconciliation and tie between Pass Through Trust Agreement dated as of June 3,
1999 and the Trust Indenture Act of 1939. This reconciliation does not
constitute part of the Pass Through Trust Agreement.

Trust Indenture Act                     Pass Through Trust
  of 1939 Section                        Agreement Section
- -------------------                     -------------------

310(a)(1)                               7.07
    (a)(2)                              7.07
312(a)                                  3.09; 8.01; 8.02
313(a)                                  7.06
314(a)                                  8.04(a) - (c)
    (a)(4)                              8.04(d)
    (c)(1)                              1.02
    (c)(2)                              1.02
    (d)(1)                              7.12
                                        11.01
    (d)(2)                              7.12; 11.01
    (d)(3)                              2.01
    (e)                                 1.02
315(b)                                  7.01
316(a)(last sentence)                   1.01
    (a)(1)(A)                           6.04
    (a)(1)(B)                           6.05
    (b)                                 6.06
    (c)                                 1.04(d)
317(a)(1)                               6.03
    (b)                                 7.12
318(a)                                  12.06

<PAGE>

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

                                    ARTICLE I
                                   DEFINITIONS

      Section 1.01.  Definitions.............................................2
      Section 1.02.  Compliance Certificates and Opinions....................9
      Section 1.03.  Form of Documents Delivered to Trustee.................10
      Section 1.04.  Acts of Certificateholders.............................10

                                   ARTICLE II
                       ORIGINAL ISSUANCE OF CERTIFICATES;
                         ACQUISITION OF EQUIPMENT NOTES

      Section 2.01.  Amount Unlimited; Issuable in Series...................11
      Section 2.02.  Acquisition of Equipment Notes.........................13
      Section 2.03.  Acceptance by Trustee..................................14
      Section 2.04.  Limitation of Powers...................................15

                                   ARTICLE III
                                THE CERTIFICATES

      Section 3.01.  Form, Denomination and Execution of Certificates.......15
      Section 3.02.  Authentication of Certificates.........................16
      Section 3.03.  Temporary Certificates.................................16
      Section 3.04.  Registration of Transfer and Exchange of Certificates..16
      Section 3.05.  Mutilated, Destroyed, Lost or Stolen Certificates......17
      Section 3.06.  Persons Deemed Owners..................................17
      Section 3.07.  Cancellation...........................................17
      Section 3.08.  Limitation of Liability for Payments...................17
      Section 3.09.  Book-Entry and Definitive Certificates.................17

                                   ARTICLE IV
                          DISTRIBUTIONS; STATEMENTS TO
                               CERTIFICATEHOLDERS

      Section 4.01.  Certificate Account and Special Payments Account.......19
      Section 4.02.  Distributions from Certificate Account and Special
                      Payments Account .....................................20
      Section 4.03.  Statements to Certificateholders.......................21
      Section 4.04.  Investment of Special Payment Moneys...................22

                                    ARTICLE V
                                   THE COMPANY

      Section 5.01.  Maintenance of Corporate Existence.....................22
      Section 5.02.  Consolidation, Merger, etc.............................22


                                      - i -
<PAGE>

                                                                          Page
                                                                          ----

                                   ARTICLE VI
                                     DEFAULT

      Section 6.01.  Events of Default......................................23
      Section 6.02.  Incidents of Sale of Equipment Notes...................24
      Section 6.03.  Judicial Proceedings Instituted by Trustee;
                      Trustee May Bring Suit ...............................24
      Section 6.04.  Control by Certificateholders..........................24
      Section 6.05.  Waiver of Past Defaults................................25
      Section 6.06.  Right of Certificateholders to Receive Payments
                      Not To Be Impaired ...................................25
      Section 6.07.  Certificateholders May Not Bring Suit Except
                      Under Certain Conditions .............................26
      Section 6.08.  Remedies Cumulative....................................26
      Section 6.09.  Undertaking for Costs..................................26

                                   ARTICLE VII
                                   THE TRUSTEE

      Section 7.01.  Notice of Defaults.....................................27
      Section 7.02.  Certain Rights of Trustee..............................27
      Section 7.03.  Not Responsible for Recitals or Issuance
                      of Certificates ......................................28
      Section 7.04.  May Hold Certificates..................................28
      Section 7.05.  Money Held in Trust....................................28
      Section 7.06.  Compensation and Reimbursement.........................28
      Section 7.07.  Corporate Trustee Required; Eligibility................30
      Section 7.08.  Resignation and Removal; Appointment of Successor......30
      Section 7.09.  Acceptance of Appointment by Successor.................31
      Section 7.10.  Merger, Conversion, Consolidation or
                      Succession to Business ...............................32
      Section 7.11.  Maintenance of Agencies................................32
      Section 7.12.  Money for Certificate Payments to Be Held in Trust.....33
      Section 7.13.  Registration of Equipment Notes in Trustee's Name......34
      Section 7.14.  Representations and Warranties of Trustee..............34
      Section 7.15.  Withholding Taxes; Information Reporting...............35
      Section 7.16.  Trustee's Liens........................................35
      Section 7.17.  Preferential Collection of Claims......................35

                                  ARTICLE VIII
                CERTIFICATEHOLDERS' LISTS AND REPORTS BY TRUSTEE

      Section 8.01.  The Company to Furnish Trustee with Names
                      and Addresses of Certificateholders...................35
      Section 8.02.  Preservation of Information; Communications
                      to Certificateholders ................................35
      Section 8.03.  Reports by Trustee.....................................36
      Section 8.04.  Reports by the Guarantor and Company...................36

                                   ARTICLE IX

                             SUPPLEMENTAL AGREEMENTS


                                     - ii -
<PAGE>

                                                                          Page
                                                                          ----

      Section 9.01.  Supplemental Agreements Without
                      Consent of Certificateholders ........................37
      Section 9.02.  Supplemental Agreements with Consent
                      of Certificateholders ................................37
      Section 9.03.  Documents Affecting Immunity or Indemnity..............38
      Section 9.04.  Execution of Supplemental Agreements...................38
      Section 9.05.  Effect of Supplemental Agreements......................38
      Section 9.06.  Conformity with Trust Indenture Act....................39
      Section 9.07.  Reference in Certificates to Supplemental Agreements...39

                                    ARTICLE X
                   AMENDMENTS TO INDENTURE AND NOTE DOCUMENTS

      Section 10.01.  Amendments and Supplements to Indenture
                       and Other Note Documents ............................39

                                   ARTICLE XI
                              TERMINATION OF TRUSTS

      Section 11.01.  Termination of the Trusts.............................39

                                   ARTICLE XII
                            MISCELLANEOUS PROVISIONS

      Section 12.01.  Limitation on Rights of Certificateholders............40
      Section 12.02.  Liabilities of Certificateholders.....................40
      Section 12.03.  Certificates Nonassessable and Fully Paid.............41
      Section 12.04.  Registration of Equipment Notes in Name of
                       Subordination Agent .................................41
      Section 12.05.  Notices...............................................41
      Section 12.06.  Governing Law.........................................42
      Section 12.07.  Severability of Provisions............................42
      Section 12.08.  Trust Indenture Act Controls..........................42
      Section 12.09.  Effect of Headings and Table of Contents..............43
      Section 12.10.  Successors and Assigns................................43
      Section 12.11.  Benefits of Agreement.................................43
      Section 12.12.  Legal Holidays........................................43
      Section 12.13.  Counterparts..........................................43
      Section 12.14.  Communication by Certificateholders with
                       Other Certificateholders ............................43

Exhibit A - Form of Certificate


                                     - iii -
<PAGE>

      This PASS THROUGH TRUST AGREEMENT, dated as of June 3, 1999, among
Northwest Airlines Corporation, a Delaware corporation (the "Guarantor"),
Northwest Airlines, Inc., a Minnesota corporation (the "Company"), and State
Street Bank and Trust Company of Connecticut, National Association, a national
banking association, as Trustee, is made with respect to the formation from time
to time of separate Northwest Airlines Pass Through Trusts, and the issuance
from time to time of separate series of Pass Through Certificates representing
fractional undivided interests in the respective Trusts.

      WITNESSETH:

      WHEREAS, from time to time the Guarantor, the Company and the Trustee may
enter into a Trust Supplement (this and certain other defined terms used herein
are defined in Section 1.01) pursuant to which the Trustee shall declare the
creation of a separate Trust for the benefit of the Holders of the series of
Certificates to be issued in respect of such Trust, and the initial Holders of
the Certificates of such series, as the grantors of such Trust, by their
respective acceptances of the Certificates of such series, shall join in the
creation of such Trust with the Trustee;

      WHEREAS, all Certificates to be issued in respect of each separate Trust
will be issued as a separate series pursuant to this Agreement, will evidence
fractional undivided interests in such Trust and will have no rights, benefits
or interests in respect of any other separate Trust or the property held
therein, subject, however, to the provisions of any Intercreditor Agreement to
which one or more Trusts may be a party;

      WHEREAS, from time to time, pursuant to the terms and conditions of this
Agreement with respect to each separate Trust formed hereunder, the Trustee on
behalf of such Trust shall purchase one or more issues of Equipment Notes having
the same interest rate as, and final maturity dates not later than the final
Regular Distribution Date of, the series of Certificates issued in respect of
such Trust and shall hold such Equipment Notes in trust for the benefit of the
Certificateholders of such Trust;

      WHEREAS, to facilitate the sale of Equipment Notes to, and the purchase of
Equipment Notes by, the Trustee on behalf of each Trust created from time to
time pursuant to this Agreement, (i) the Company as the "issuer", as such term
is defined in and solely for purposes of the Securities Act of 1933, as amended,
of the Certificates to be issued in respect of each Trust and as the "obligor",
as such term is defined in and solely for purposes of the Trust Indenture Act of
1939, as amended, and (ii) the Guarantor have each duly authorized the execution
and delivery of this Basic Agreement and each Trust Supplement with respect to
all such Certificates and are undertaking to perform certain administrative and
ministerial duties hereunder and are also undertaking to pay the fees and
expenses of the Trustee;

      WHEREAS, this Basic Agreement, as supplemented from time to time, is
subject to the provisions of the Trust Indenture Act of 1939, as amended, and
shall, to the extent applicable, be governed by such provisions;

      NOW THEREFORE, in consideration of the mutual agreements herein contained,
and of other good and valuable consideration the receipt and adequacy of which
are hereby acknowledged, the parties hereto agree as follows:

<PAGE>
                                                                               2


                                    ARTICLE I

                                   DEFINITIONS

      Section 1.01. Definitions. For all purposes of this Basic Agreement,
except as otherwise expressly provided or unless the context otherwise requires:

            (1) the terms used herein that are defined in this Article have the
      meanings assigned to them in this Article, and include the plural as well
      as the singular;

            (2) all other terms used herein which are defined in the Trust
      Indenture Act, either directly or by reference therein, have the meanings
      assigned to them therein:

            (3) all references in this Basic Agreement to designated "Articles",
      "Sections" and other subdivisions are to the designated Articles, Sections
      and other subdivisions of this Basic Agreement;

            (4) the words "herein", "hereof" and "hereunder" and other words of
      similar import refer to this Basic Agreement as a whole and not to any
      particular Article, Section or other subdivision; and

            (5) the term "this Agreement" (as distinguished from "this Basic
      Agreement") refers, unless the context otherwise requires, to this Basic
      Agreement as supplemented by the Trust Supplement creating a particular
      Trust and establishing the series of Certificates issued or to be issued
      in respect thereof, with reference to such Trust and such series of
      Certificates, as this Basic Agreement as so supplemented may be further
      supplemented with respect to such Trust and such series of Certificates.

      Act: With respect to any Certificateholder has the meaning specified in
Section 1.04.

      Affiliate: With respect to any specified Person, means any other Person
directly or indirectly controlling or controlled by or under direct or indirect
common control with such Person. For the purposes of this definition, "control",
when used with respect to any specified Person, means the power to direct the
management and policies of such Person, directly or indirectly, whether through
the ownership of voting securities, by contract or otherwise, and the terms
"controlling" and "controlled" have meanings correlative to the foregoing.

      Aircraft: Means one or more aircraft, including engines therefor, owned by
or leased to the Company and securing one or more Equipment Notes.

      Authorized Agent: With respect to the Certificates of any series, means
any Paying Agent or Registrar for the Certificates of such series.

      Basic Agreement: Means this Pass Through Trust Agreement, as the same may
from time to time be supplemented, amended or modified, but does not include any
Trust Supplement.

      Book-Entry Certificates: With respect to the Certificates of any series,
means a beneficial interest in the Certificates of such series, ownership and
transfers of which shall be made through book entries as described in Section
3.09.

<PAGE>
                                                                               3


      Business Day: With respect to the Certificates of any series, means any
day other than a Saturday, a Sunday or a day on which commercial banks are
required or authorized to close in Minneapolis, Minnesota or New York, New York;
and, so long as any such Certificate is outstanding, a city and state in which
the Trustee or any related Loan Trustee maintains its Corporate Trust Office or
receives and disburses funds.

      Certificate: Means any one of the certificates executed and authenticated
by the Trustee, substantially in the form of Exhibit A hereto.

      Certificate Account: With respect to the Certificates of any series, means
the account or accounts created and maintained for such series pursuant to
Section 4.01(a) and the related Trust Supplement.

      Certificateholder or Holder: With respect to the Certificates of any
series, means the Person in whose name a Certificate of such series is
registered in the Register for Certificates of such series.

      Certificate Owner: With respect to the Certificates of any series, means,
for purposes of Section 3.09, the Person who owns a Book-Entry Certificate of
such series.

      Clearing Agency: Means an organization registered as a "clearing agency"
pursuant to Section 17A of the Securities Exchange Act of 1934, as amended.

      Clearing Agency Participant: Means a broker, dealer, bank, other financial
institution or other Person for whom from time to time a Clearing Agency
effects, directly or indirectly, book-entry transfers and pledges of securities
deposited with the Clearing Agency.

      Company: Means Northwest Airlines, Inc., a Minnesota corporation, or its
successor in interest pursuant to Section 5.02.

      Controlling Party: Means the Person entitled to act as such pursuant to
the terms of any Intercreditor Agreement.

      Corporate Trust Office: With respect to the Trustee or any Loan Trustee,
means the office of such trustee in the city at which at any particular time its
corporate trust business shall be principally administered.

      Cut-off Date: With respect to the Certificates of any series, means the
date designated as such in the Trust Supplement establishing such series.

      Definitive Certificates: With respect to the Certificate of any series,
has the meaning specified in Section 3.09.

      Direction: Has the meaning specified in Section 1.04(c).

      Equipment Note: With respect to the Certificates of any series, has the
meaning given to "Secured Certificate" in the related Indenture.

      ERISA: Means the Employee Retirement Income Security Act of 1974, as
amended from time to time, or any successor federal statute.

<PAGE>
                                                                               4


      Escrow Account: With respect to the Certificates of any series, has the
meaning specified in Section 2.02(b).

      Escrowed Funds: With respect to any Trust, has the meaning specified in
Section 2.02(b).

      Event of Default: Means, in respect of any Trust, the occurrence of an
Indenture Default under any Indenture pursuant to which Equipment Notes held by
such Trust were issued.

      Fractional Undivided Interest: Means the fractional undivided interest in
a Trust that is evidenced by a Certificate relating to such Trust.

      Guarantor: Means Northwest Airlines Corporation, a Delaware corporation,
or its successor in interest.

      Indenture: With respect to any Trust, means each of the one or more
separate trust indenture and security agreements described in, or on a schedule
attached to, this Agreement which relates to an issue of Equipment Notes to be
held in such Trust and an indenture having substantially the same terms and
conditions as such trust indenture and security agreement and which relates to a
Substitute Aircraft; as each such agreement may be amended or supplemented in
accordance with its respective terms; and Indentures means all of such
agreements.

      Indenture Default: With respect to any Indenture, means any Indenture
Event of Default (as such term is defined in such Indenture).

      Initial Regular Distribution Date: With respect to the Certificates of any
series, means the first Regular Distribution Date on which a Scheduled Payment
is to be made.

      Intercreditor Agreement: Means any agreement by and among one or more
Trusts, one or more Liquidity Providers and a Subordination Agent providing for
the distribution of payments made in respect of Equipment Notes held by such
Trusts.

      Issuance Date: With respect to the Certificates of any series, means the
date of the issuance of such Certificates.

      Lease: Means any lease between an Owner Trustee, as the lessor, and the
Company, as the lessee, referred to in the related Indenture, as each such lease
may be amended or supplemented in accordance with its respective terms; and
Leases means all such Leases.

      Letter of Representations: With respect to the Certificates of any series,
means the agreement among the Company, the Trustee and the initial Clearing
Agency substantially in the form attached as an Exhibit to the related Trust
Supplement.

      Liquidity Facility: With respect to the Certificates of any Series, means
any revolving credit agreement or similar facility relating to the Certificates
of such series between a Liquidity Provider and a Subordination Agent, as
amended, replaced, supplemented or otherwise modified from time to time in
accordance with its terms and the terms of any Intercreditor Agreement.
<PAGE>
                                                                               5


      Liquidity Provider: With respect to the Certificates of any Series, means
a bank or other financial institution that agrees to provide Liquidity
Facilities for the benefit of the holders of Certificates of such series.

      Loan Trustee: With respect to any Equipment Note or the Indenture
applicable thereto, means the bank or trust company designated as loan or
indenture trustee under such Indenture; and any successor to such Loan Trustee
as such trustee; and Loan Trustees means all of the Loan Trustees under the
Indentures.

      Note Documents: With respect to any Equipment Note, means the related
Indenture, Note Purchase Agreement, and if the related Aircraft is leased to the
Company, the related Lease and the related Owner Trustee's Purchase Agreement.

      Note Purchase Agreement: With respect to the Certificates of any series,
means any note purchase, refunding, participation or similar agreement providing
for, among other things, the purchase of Equipment Notes by the Trustee on
behalf of the relevant Trust; and Note Purchase Agreements means all such
agreements.

      Officer's Certificate: Means a certificate signed, (a) in the case of the
Guarantor or the Company, by (i) a Co-Chairman of the Board of Directors, the
President or any Executive Vice President or Senior Vice President of the
Guarantor or the Company, signing alone or (ii) any Vice President of the
Guarantor or the Company signing together with the Secretary, the Assistant
Secretary, the Treasurer or any Assistant Treasurer of the Guarantor or the
Company, or (b) in the case of the Trustee or an Owner Trustee or a Loan
Trustee, a Responsible Officer of the Trustee or such Owner Trustee or such Loan
Trustee, as the case may be.

      Other Agreements: Has the meaning specified in Section 6.01(b).

      Opinion of Counsel: Means a written opinion of legal counsel who (a) in
the case of counsel for the Guarantor or the Company, may be (i) a senior
attorney in rank of the officers of the Guarantor or the Company a principal
duty of which is furnishing advice as to legal matters, (ii) Simpson Thacher &
Bartlett or (iii) such other counsel designated by the Guarantor or the Company
and reasonably acceptable to the Trustee and (b) in the case of any Owner
Trustee or any Loan Trustee, may be such counsel as may be designated by any of
them whether or not such counsel is an employee of any of them, and who shall be
reasonably acceptable to the Trustee.

      Outstanding: With respect to Certificates of any series, means, as of the
date of determination, all Certificates of such series theretofore authenticated
and delivered under this Agreement, except:

            (i) Certificates of such series theretofore cancelled by the
      Registrar or delivered to the Trustee or the Registrar for cancellation;

            (ii) All of the Certificates of such series if money in the full
      amount required to make the final distribution with respect to such series
      pursuant to Section 11.01 hereof has been theretofore deposited with the
      Trustee in trust for the Holders of the Certificates of such series as
      provided in Section 4.01 pending distribution of such money to such
      Certificateholders pursuant to such final distribution payment; and

<PAGE>
                                                                               6


            (iii) Certificates of such series in exchange for or in lieu of
      which other Certificates of such series have been authenticated and
      delivered pursuant to this Agreement.

      Owner Participant: With respect to any Equipment Note, means the "Owner
Participant", if any, as referred to in the Indenture pursuant to which such
Equipment Note is issued and any permitted successor or assign of such Owner
Participant; and Owner Participants at any time of determination means all of
the Owner Participants thus referred to in the Indentures.

      Owner Trustee: with respect to any Equipment Note, means the "Owner
Trustee", if any, as referred to in the Indenture pursuant to which such
Equipment Note is issued, not in its individual capacity but solely as trustee;
and Owner Trustees means all of the Owner Trustees party to any of the
respective Indentures.

      Owner Trustee's Purchase Agreement: With respect to the Certificates of
any series, if the related Aircraft is leased to the Company, has the meaning
specified therefor in the related Lease.

      Paying Agent: With respect to the Certificates of any series, means the
paying agent maintained and appointed for the Certificates of such series
pursuant to Section 7.11.

      Permitted Investments: Means obligations of the United States of America
or agencies or instrumentalities thereof for the payment of which the full faith
and credit of the United States of America is pledged, maturing in not more than
60 days or such lesser time as is necessary for payment of any Special Payments
on a Special Distribution Date.

      Person: Means any person, including any individual, corporation,
partnership, joint venture, association, joint stock company, trust,
unincorporated organization, or government or any agency or political
subdivision thereof.

      Pool Balance: Means, as of any date, (i) the original aggregate face
amount of the Certificates of any series less (ii) the aggregate amount of all
payments made in respect of such Certificates other than payments made in
respect of interest or premium thereon or reimbursement of any costs or expenses
incurred in connection therewith. The Pool Balance as of any Distribution Date
shall be computed after giving effect to the payment of principal, if any, on
the Equipment Notes or other Trust Property held in the Trust and the
distribution thereof to be made on such Distribution Date.

      Pool Factor: Means, with respect to any series of Certificates as of any
date, the quotient (rounded to the seventh decimal place) computed by dividing
(i) the Pool Balance of such series as at such date by (ii) the original
aggregate face amount of the Certificates of such series. The Pool Factor as of
any Distribution Date shall be computed after giving effect to the payment of
principal, if any, on the Equipment Notes or other Trust Property and the
distribution thereof to be made on such Distribution Date.

      Postponed Notes: With respect to any Trust or the related series of
Certificates, means the Equipment Notes to be held in such Trust as to which a
Postponement Notice shall have been delivered pursuant to Section 2.02(b).

      Postponement Notice: With respect to any Trust or the related series of
Certificates, means an Officer's Certificate of the Company signed by an officer
of the Company (1) requesting that the Trustee temporarily postpone purchase of
the related Equipment Notes to a date later than the Issuance

<PAGE>
                                                                               7


Date of such series of Certificates, (2) identifying the amount of the purchase
price of each such Equipment Note and the aggregate purchase price for all such
Equipment Notes, (3) setting forth the reasons for such postponement and (4)
with respect to each such Equipment Note, either (a) setting or resetting a new
Transfer Date (which shall be on or prior to the applicable Cut-off Date) for
payment by the Trustee of such purchase price and issuance of the related
Equipment Note, or (b) indicating that such new Transfer Date (which shall be on
or prior to the applicable Cut-off Date) will be set by subsequent written
notice not less than one Business Day prior to such new Transfer Date.

      PTC Event of Default: Means any failure to pay within 10 Business Days of
the due date thereof: (i) the outstanding Pool Balance on a date specified in
any Trust Supplement or (ii) interest due on the Certificates of any series on
any Distribution Date.

      Record Date: With respect to any Trust or the related series of
Certificates, means (i) for Scheduled Payments to be distributed on any Regular
Distribution Date, other than the final distribution, with respect to such
series, the 15th day (whether or not a Business Day) preceding such Regular
Distribution Date, and (ii) for Special Payments to be distributed on any
Special Distribution Date, other than the final distribution, with respect to
such series, the 15th day (whether or not a Business Day) preceding such Special
Distribution Date.

      Register and Registrar: With respect to the Certificates of any series,
mean the register maintained and the registrar appointed for such series
pursuant to Sections 3.04 and 7.11.

      Regular Distribution Date: With respect to distributions of Scheduled
Payments in respect of any series of Certificates, means each date designated as
such in this Agreement, until payment of all the Scheduled Payments to be made
under the Equipment Notes held in such Trust has been made.

      Request: Means a request by the Company setting forth the subject matter
of the request accompanied by an Officer's Certificate and an Opinion of Counsel
as provided in Section 1.02 of this Basic Agreement.

      Responsible Officer: With respect to any Trustee, any Loan Trustee and any
Owner Trustee, means any officer in the Corporate Trust Division of the Trustee,
Loan Trustee or Owner Trustee or any other officer customarily performing
functions similar to those performed by the persons who at the time shall be
such officers, respectively, or to whom any corporate trust matter is referred
because of his knowledge of and familiarity with a particular subject.

      Scheduled Payment: With respect to any Equipment Note, means any payment
of principal and interest on such Equipment Note or any payment of interest on
the Certificates of any series with funds drawn under the Liquidity Facility for
such series (other than any such payment which is not in fact received by the
Trustee or any Subordination Agent within five days of the date on which such
payment is scheduled to be made) due from the obligor thereon which payment
represents the installment of principal at the stated maturity of such
installment of principal on such Equipment Note, the payment of regularly
scheduled interest accrued on the unpaid principal amount of such Equipment
Note, or both; provided that any payment of principal, premium, if any, or
interest resulting from the redemption or purchase of any Equipment Note shall
not constitute a Scheduled Payment.

      SEC: Means the Securities and Exchange Commission, as from time to time
constituted or created under the Securities Exchange Act of 1934, or, if at any
time after the execution of this

<PAGE>
                                                                               8


instrument such Commission is not existing and performing the duties now
assigned to it under the Trust Indenture Act, then the body performing such
duties on such date.

      Special Distribution Date: With respect to the Certificates of any series,
means each date on which a Special Payment is to be distributed as specified in
this Agreement.

      Special Payment: Means (i) any payment (other than a Scheduled Payment) in
respect of, or any proceeds of, any Equipment Note or Trust Indenture Estate (as
defined in each Indenture) or (ii) the amounts required to be distributed
pursuant to the last paragraph of Section 2.02(b) or (iii) the amounts required
to be distributed pursuant to the penultimate paragraph of Section 2.02(b).

      Special Payments Account: With respect to the Certificates of any series,
means the account or accounts created and maintained for such series pursuant to
Section 4.01(b) and the related Trust Supplement.

      Specified Investments: With respect to any Trust, means, unless otherwise
specified in the related Trust Supplement, (i) obligations of, or guaranteed by,
the United States Government or agencies thereof, (ii) open market commercial
paper of any corporation incorporated under the laws of the United States of
America or any State thereof rated at least P-2 or its equivalent by Moody's
Investors Service, Inc. or at least A-2 or its equivalent by Standard & Poor's
Rating Group, (iii) certificates of deposit issued by commercial banks organized
under the laws of the United States or of any political subdivision thereof
having a combined capital and surplus in excess of $500,000,000 which banks or
their holding companies have a rating of A or its equivalent by Moody's
Investors Service, Inc. or Standard & Poor's Rating Group; provided, however,
that the aggregate amount at any one time so invested in certificates of deposit
issued by any one bank shall not exceed 5% of such bank's capital and surplus,
(iv) U.S. dollar denominated offshore certificates of deposit issued by, or
offshore time deposits with, any commercial bank described in (iii) or any
subsidiary thereof and (v) repurchase agreements with any financial institution
having combined capital and surplus of at least $500,000,000 with any of the
obligations described in clauses (i) through (iv) as collateral; provided
further that if all of the above investments are unavailable, the entire amounts
to be invested may be used to purchase Federal Funds from an entity described in
clause (iii) above; and provided further that no investment shall be eligible as
a "Specified Investment" unless the final maturity or date of return of such
investment is on or before the Special Distribution Date next following the
Cut-off Date, if any, for such Trust by more than 20 days.

      Subordination Agent: Shall have the meaning specified therefor in any
Intercreditor Agreement.

      Substitute Aircraft: With respect to any Trust, means any Aircraft of a
type specified in this Agreement and, at the election of the Company,
substituted prior to the applicable Cut-off Date, if any, pursuant to the terms
of this Agreement.

      Transfer Date: Has the meaning assigned to that term or any of the terms
"Delivery Date", "Funding Date" or "Closing Date" in a Note Purchase Agreement.

      Triggering Event: Shall have the meaning specified therefor in any
Intercreditor Agreement.

      Trust: With respect to the Certificates of any series, means the trust
under this Agreement.

<PAGE>
                                                                               9


      Trustee: Means the institution executing this Basic Agreement as Trustee,
or its successor in interest, and any successor trustee appointed as provided
herein.

      Trust Indenture Act: Except as otherwise provided in Section 9.06, means
the Trust Indenture Act of 1939 as in force at the date as of which this Basic
Agreement was executed.

      Trust Property: With respect to any Trust, means (i) the Equipment Notes
held as the property of such Trust, all monies at any time paid thereon and all
monies due and to become due thereunder, (ii) the rights of such Trust under any
Intercreditor Agreement, including all monies receivable in respect of such
rights, (iii) all monies receivable under any Liquidity Facility for such Trust
and (iv) funds from time to time deposited in the related Escrow Account, the
related Certificate Account and the related Special Payments Account and any
proceeds from the sale by the Trustee pursuant to Article VI hereof of any such
Equipment Note.

      Trust Supplement: Means an agreement supplemental hereto pursuant to which
(i) a separate Trust is created for the benefit of the Holders of the
Certificates of a series, (ii) the issuance of the Certificates of such series
representing fractional undivided interests in such Trust is authorized and
(iii) the terms of the Certificates of such series are established.

      Section 1.02. Compliance Certificates and Opinions. Upon any application
or request by the Company, any Owner Trustee or any Loan Trustee to the Trustee
to take any action under any provision of this Basic Agreement or, in respect of
the Certificates of any series, this Agreement, the Company, such Owner Trustee
or such Loan Trustee, as the case may be, shall furnish to the Trustee an
Officers' Certificate stating that, in the opinion of the signers, all
conditions precedent, if any, provided for in this Basic Agreement or this
Agreement relating to the proposed action have been complied with and an Opinion
of Counsel stating that in the opinion of such counsel all such conditions
precedent, if any, have been complied with, except that in the case of any such
application or request as to which the furnishing of such documents is
specifically required by any provision of this Basic Agreement or this Agreement
relating to such particular application or request, no additional certificate or
opinion need be furnished.

      Every certificate or opinion with respect to compliance with a condition
or covenant provided for in this Basic Agreement or, in respect of the
Certificates of any series, this Agreement (other than a certificate provided
pursuant to Section 8.04(d)) or any Trust Supplement shall include:

            (1) a statement that each individual signing such certificate or
      opinion has read such covenant or condition and the definitions in this
      Basic Agreement or this Agreement relating thereto;

            (2) a brief statement as to the nature and scope of the examination
      or investigation upon which the statements or opinions contained in such
      certificate or opinion are based;

            (3) a statement that, in the opinion of each such individual, he has
      made such examination or investigation as is necessary to enable him to
      express an informed opinion as to whether or not such covenant or
      condition has been complied with; and

            (4) a statement as to whether, in the opinion of each such
      individual, such condition or covenant has been complied with.

<PAGE>
                                                                              10


      Section 1.03. Form of Documents Delivered to Trustee. In any case where
several matters are required to be certified by, or covered by an opinion of,
any specified Person, it is not necessary that all such matters be certified by,
or covered by the opinion of, only one such Person, or that they be so certified
or covered by only one document, but one such Person may certify or give an
opinion with respect to some matters and one or more other such Persons as to
other matters and any such Person may certify or give an opinion as to such
matters in one or several documents.

      Any Opinion of Counsel stated to be based on the opinion of other counsel
shall be accompanied by a copy of such other opinion.

      Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Basic Agreement or, in respect of the Certificates of any
series, this Agreement, they may, but need not, be consolidated and form one
instrument.

      Section 1.04. Acts of Certificateholders. (a) Any direction, consent,
waiver or other action provided by this Agreement in respect of the Certificates
of any series to be given or taken by Certificateholders may be embodied in and
evidenced by one or more instruments of substantially similar tenor signed by
such Certificateholders in person or by an agent or proxy duly appointed in
writing; and, except as herein otherwise expressly provided, such action shall
become effective when such instrument or instruments are delivered to the
Trustee and, where it is hereby expressly required pursuant to this Agreement,
to the Company or any Loan Trustee. Such instrument or instruments (and the
action embodied therein and evidenced thereby) are herein sometimes referred to
as the "Act" of the Certificateholders signing such instrument or instruments.
Proof of execution of any such instrument or of a writing appointing any such
agent shall be sufficient for any purpose of such Trust Supplement and
conclusive in favor of the Trustee, the Company and the related Loan Trustee, if
made in the manner provided in this Section.

      (b) The fact and date of the execution by any Person of any such
instrument or writing may be proved by the certificate of any notary public or
other officer of any jurisdiction authorized to take acknowledgments of deeds or
administer oaths that the Person executing such instrument acknowledged to him
the execution thereof, or by an affidavit of a witness to such execution sworn
to before any such notary or such other officer and where such execution is by
an officer of a corporation or association or a member of a partnership, on
behalf of such corporation, association or partnership, such certificate or
affidavit shall also constitute sufficient proof of his authority. The fact and
date of the execution of any such instrument or writing, or the authority of the
Person executing the same, may also be proved in any other reasonable manner
which the Trustee deems sufficient.

      (c) In determining whether the Certificateholders of the requisite
Fractional Undivided Interests of Certificates of any series Outstanding have
given any direction, consent or waiver (a "Direction"), under this Agreement,
Certificates owned by the Company, the Guarantor, any related Owner Trustee, any
related Owner Participant or any Affiliate of any such Person shall be
disregarded and deemed not to be Outstanding for purposes of any such
determination. In determining whether the Trustee shall be protected in relying
upon any such Direction, only Certificates which the Trustee knows to be so
owned shall be so disregarded. Notwithstanding the foregoing, (i) if any such
Person owns 100% of the Certificates of any series Outstanding, such
Certificates shall not be so disregarded as aforesaid, and (ii) if any amount of
Certificates of such series so owned by any such Person have been pledged in
good faith, such Certificates shall not be disregarded as aforesaid if the
pledgee establishes to the satisfaction of the Trustee the pledgee's right so to
act with respect to such

<PAGE>
                                                                              11


Certificates and that the pledgee is not the Company, the Guarantor, any related
Owner Trustee, any related Owner Participant or any Affiliate of any such
Person.

      (d) The Company may at its option by delivery of an Officer's Certificate
to the Trustee set a record date to determine the Certificateholders in respect
of the Certificates of any series, entitled to give any consent, request,
demand, authorization, direction, notice, waiver or other Act. Notwithstanding
Section 316(c) of the Trust Indenture Act, such record date shall be the record
date specified in such Officer's Certificate which shall be a date not more than
30 days prior to the first solicitation of Certificateholders in connection
therewith. If such a record date is fixed, such consent, request, demand,
authorization, direction, notice, waiver or other Act may be given before or
after such record date, but only the Certificateholders of record of the
applicable series at the close of business on such record date shall be deemed
to be Certificateholders for the purposes of determining whether
Certificateholders of the requisite proportion of Outstanding Certificates of
such series have authorized or agreed or consented to such consent, request,
demand, authorization, direction, notice, waiver or other Act, and for that
purpose the Outstanding Certificates of such series shall be computed as of such
record date; provided that no such consent, request, demand, authorization,
direction, notice, waiver or other Act by the Certificateholders on such record
date shall be deemed effective unless it shall become effective pursuant to the
provisions of this Basic Agreement not later than one year after the record
date.

      (e) Any direction, consent, waiver or other action by the
Certificateholder of any Certificate shall bind the Certificateholder of every
Certificate issued upon the transfer thereof or in exchange therefor or in lieu
thereof, whether or not notation of such action is made upon such Certificate.

      (f) Except as otherwise provided in Section 1.04(c), Certificates of any
series owned by or pledged to any Person shall have an equal and proportionate
benefit under the provisions of this Agreement, without preference, priority, or
distinction as among all of the Certificates of such series.

                                   ARTICLE II

                       ORIGINAL ISSUANCE OF CERTIFICATES;
                         ACQUISITION OF EQUIPMENT NOTES

      Section 2.01. Amount Unlimited; Issuable in Series.

      (a) The aggregate principal amount of Certificates of each series which
may be authenticated and delivered under this Basic Agreement is limited to an
amount equal to the aggregate principal amount of the Equipment Notes held in
the related Trust. The Certificates may be issued from time to time in one or
more series and shall be designated generally as the "Pass Through
Certificates", with such further designations added or incorporated in such
title for the Certificates of each series as specified in the related Trust
Supplement. Each Certificate shall bear upon its face the designation so
selected for the series to which it belongs. All Certificates of the same series
shall be substantially identical except that the Certificates of a series may
differ as to denomination and as may otherwise be provided in the Trust
Supplement establishing the Certificates of such series. Each series of
Certificates issued pursuant to this Agreement will evidence fractional
undivided interests in the related Trust and, except as may be contained in any
Intercreditor Agreement, will have no rights, benefits or interests in respect
of any other Trust or the Trust Property held therein. All Certificates of the
same series shall be in all respects equally and ratably entitled to the
benefits of this Agreement

<PAGE>
                                                                              12


without preference, priority or distinction on account of the actual time or
times of authentication and delivery, all in accordance with the terms and
provisions of this Agreement.

      (b) The following matters shall be established with respect to the
Certificates of each series issued hereunder by a Trust Supplement executed and
delivered by and among the Company, the Guarantor and the Trustee:

            (1) the formation of the Trust as to which the Certificates of such
      series represent fractional undivided interests and its designation (which
      designation shall distinguish such Trust from each other Trust created
      under this Basic Agreement and a Trust Supplement);

            (2) the specific title of the Certificates of such series (which
      title shall distinguish the Certificates of such series from each other
      series of Certificates created under this Basic Agreement and a Trust
      Supplement);

            (3) any limit upon the aggregate principal amount of the
      Certificates of such series which may be authenticated and delivered
      (which limit shall not pertain to Certificates authenticated and delivered
      upon registration of transfer of, or in exchange for, or in lieu of, other
      Certificates of the series pursuant to Sections 3.03, 3.04 and 3.05);

            (4) the Cut-off Date with respect to the Certificates of such
      series;

            (5) the Regular Distribution Dates applicable to the Certificates of
      such series;

            (6) the Special Distribution Dates applicable to the Certificates of
      such series;

            (7) if other than as provided in Section 7.11(b), the Registrar or
      the Paying Agent for the Certificates of such series, including any
      Co-Registrar or additional Paying Agent;

            (8) if other than as provided in Section 3.01, the denominations in
      which the Certificates of such series shall be issuable;

            (9) if other than United States dollars, the currency or currencies
      (including currency units) in which the Certificates of such series shall
      be denominated;

            (10) the specific form of the Certificates of such series (including
      the interest rate applicable thereto) and whether or not Certificates of
      such series are to be issued as Book-Entry Certificates and, if such
      Certificates are to be Book-Entry Certificates, the form of Letter of
      Representations, if any (or, in the case of any Certificates denominated
      in a currency other than United States dollars and if other than as
      provided in Section 3.09, whether and the circumstances under which
      beneficial owners of interests in such Certificates in permanent global
      form may exchange such interests for Certificates of such series and of
      like tenor of any authorized form and denomination);

            (11) a description of the Equipment Notes to be acquired and held in
      the related Trust and of the related Aircraft and Note Documents;

<PAGE>
                                                                              13


            (12) provisions with respect to the terms for which the definitions
      set forth in Article I hereof or the terms of Section 11.01 hereof permit
      or require further specification in the related Trust Supplement;

            (13) any restrictions (including legends) in respect of ERISA;

            (14) whether such series will be subject to an Intercreditor
      Agreement and, if so, the specific designation of such Intercreditor
      Agreement; and

            (15) any other terms of the Certificates of such series (which terms
      shall not be inconsistent with the provisions of the Trust Indenture Act),
      including any terms which may be required or advisable under United States
      laws or regulations or advisable in connection with the marketing of
      Certificates of the series.

      (c) At any time and from time to time after the execution and delivery of
this Basic Agreement and a Trust Supplement forming a Trust and establishing the
terms of Certificates of a series, Certificates of such series shall be
executed, authenticated and delivered by the Trustee to the Person or Persons
specified by the Company upon request of the Company and upon satisfaction of
any conditions precedent set forth in such Trust Supplement or in any other
document to which a Trustee is a party relating to the issuance of the
Certificates of such series.

      Section 2.02. Acquisition of Equipment Notes.

      (a) Unless otherwise specified in the related Trust Supplement, on or
prior to the Issuance Date of the Certificates of a series, the Trustee shall
execute and deliver the related Note Purchase Agreements in the form delivered
to the Trustee by the Company. The Trustee shall issue and sell such
Certificates, in authorized denominations and in such Fractional Undivided
Interests, so as to result in the receipt of consideration in an amount equal to
the aggregate purchase price of such Equipment Notes and, concurrently
therewith, the Trustee shall purchase, pursuant to the terms and conditions of
the Note Purchase Agreements, the Equipment Notes at a purchase price equal to
the amount of such consideration so received. Except as provided in Sections
3.03, 3.04 and 3.05 hereof, the Trustee shall not execute, authenticate or
deliver Certificates of such series in excess of the aggregate amount specified
in this paragraph. The provisions of this Subsection (a) are subject to the
provisions of Subsection (b) below.

      (b) If on or prior to the Issuance Date with respect to a series of
Certificates the Company shall deliver to the Trustee a Postponement Notice
relating to one or more Postponed Notes, the Trustee shall postpone the purchase
of such Postponed Notes and shall deposit into an escrow account (as to such
Trust, the "Escrow Account") to be maintained as a part of the related Trust an
amount equal to the purchase price of such Postponed Notes (the "Escrowed
Funds"). The Escrowed Funds so deposited shall be invested by the Trustee at the
written direction and risk of, and for the benefit of, the Company in Specified
Investments (i) maturing no later than any scheduled Transfer Date relating to
such series of Certificates or (ii) if no such Transfer Date has been scheduled,
maturing on the next Business Day, or (iii) if the Company has given notice to
the Trustee that any Postponed Notes will not be issued, with respect to the
portion of the Escrowed Funds relating to such Postponed Notes, maturing on the
next applicable Special Distribution Date, if such investments are reasonably
available for purchase. The Trustee shall make withdrawals from the Escrow
Account only as provided in this Agreement. Upon request of the Company on one
or more occasions and the satisfaction of the closing conditions specified in
the applicable Note Purchase Agreements on or prior to the related Cut-off

<PAGE>
                                                                              14


Date, the Trustee shall purchase the applicable Postponed Notes with the
Escrowed Funds withdrawn from the Escrow Account. The purchase price shall equal
the principal amount of such Postponed Notes.

      The Trustee shall hold all Specified Investments until the maturity
thereof and will not sell or otherwise transfer Specified Investments. If
Specified Investments held in an Escrow Account mature prior to any applicable
Transfer Date, any proceeds received on the maturity of such Specified
Investments (other than any earnings thereon) shall be reinvested by the Trustee
at the written direction and risk of, and for the benefit of, the Company in
Specified Investments maturing as provided in the preceding paragraph.

      Any earnings on Specified Investments received from time to time by the
Trustee shall be promptly distributed to the Company. The Company shall pay to
the Trustee for deposit to the relevant Escrow Account an amount equal to any
losses on such Specified Investments as incurred. On the Initial Regular
Distribution Date in respect of the Certificates of any series, the Company will
pay (in immediately available funds) to the Trustee an amount equal to the
interest that would have accrued on any Postponed Notes, if any, purchased after
the Issuance Date if such Postponed Notes had been purchased on the Issuance
Date, from the Issuance Date to, but not including, the date of the purchase of
such Postponed Notes by the Trustee.

      If, in respect of the Certificates of any series, the Company notifies the
Trustee prior to the Cut-off Date that any Postponed Notes will not be issued on
or prior to the Cut-off Date for any reason, on the next Special Distribution
Date for such Certificates occurring more than 20 days following the date of
such notice (i) the Company shall pay to the Trustee for deposit in the related
Special Payments Account, in immediately available funds, an amount equal to the
interest that would have accrued on the Postponed Notes designated in such
notice at a rate equal to the interest rate applicable to such Certificates from
the Issuance Date to, but not including, such Special Distribution Date and (ii)
the Trustee shall transfer an amount equal to that amount of Escrowed Funds that
would have been used to purchase the Postponed Notes designated in such notice
and the amount paid by the Company pursuant to the immediately preceding clause
(i) to the related Special Payments Account for distribution as a Special
Payment in accordance with the provisions hereof.

      If, on such Cut-off Date, an amount equal to less than all of the Escrowed
Funds (other than Escrowed Funds referred to in the immediately preceding
paragraph) has been used to purchase Postponed Notes, on the next such Special
Distribution Date occurring more than 20 days following such Cut-off Date (i)
the Company shall pay to the Trustee for deposit in such Special Payments
Account, in immediately available funds, an amount equal to the interest that
would have accrued on such Postponed Notes contemplated to be purchased with
such unused Escrowed Funds (other than Escrowed Funds referred to in the
immediately preceding paragraph) but not so purchased at a rate equal to the
interest rate applicable to such Certificates from the Issuance Date to, but not
including, such Special Distribution Date and (ii) the Trustee shall transfer
such unused Escrowed Funds and the amount paid by the Company pursuant to the
immediately preceding clause (i) to such Special Payments Account for
distribution as a Special Payment in accordance with the provisions hereof.

      Section 2.03. Acceptance by Trustee. The Trustee, upon the execution and
delivery of a Trust Supplement creating a Trust and establishing a series of
Certificates, shall acknowledge its acceptance of all right, title, and interest
in and to the Equipment Notes to be acquired pursuant to Section 2.02 hereof and
the related Note Purchase Agreements and shall declare that the Trustee holds
and will hold such right, title, and interest, together with all other property
constituting the Trust Property of such Trust, for the benefit of all then
present and future Certificateholders of such

<PAGE>
                                                                              15


series, upon the trusts herein and in such Trust Supplement set forth. By its
payment for and acceptance of each Certificate of such series issued to it under
this Agreement, each initial Certificateholder of such series as grantor of such
Trust shall thereby join in the creation and declaration of such Trust.

      Section 2.04. Limitation of Powers. Each Trust shall be constituted solely
for the purpose of making the investment in the Equipment Notes provided for in
the related Trust Supplement, and, except as set forth herein or in this
Agreement, the Trustee shall not be authorized or empowered to acquire any other
investments or engage in any other activities and, in particular, the Trustee
shall not be authorized or empowered to do anything that would cause such Trust
to fail to qualify as a "grantor trust" for federal income tax purposes
(including as subject to this restriction, acquiring the Aircraft (as defined in
the respective related Indentures) by bidding such Equipment Notes or otherwise,
or taking any action with respect to any such Aircraft once acquired).

                                   ARTICLE III

                                THE CERTIFICATES

      Section 3.01. Form, Denomination and Execution of Certificates. The
Certificates of each series shall be issued in fully registered form without
coupons and shall be substantially in the form attached hereto as Exhibit A,
with such omissions, variations and insertions as are permitted by this
Agreement, and may have such letters, numbers or other marks of identification
and such legends or endorsements printed, lithographed or engraved thereon, as
may be required to comply with the rules of any securities exchange on which
such Certificates may be listed or to conform to any usage in respect thereof,
or as may, consistently herewith, be prescribed by the Trustee or by the officer
executing such Certificates, such determination by said officer to be evidenced
by his signing the Certificates.

      Except as provided in Section 3.09, the definitive Certificates of such
series shall be printed, lithographed or engraved or produced by any combination
of these methods or may be produced in any other manner permitted by the rules
of any securities exchange on which the Certificates may be listed, all as
determined by the officer executing such Certificates, as evidenced by his
execution of such Certificates.

      Except as otherwise provided in the related Trust Supplement, the
Certificates of each series shall be issued in minimum denominations of $1,000
or integral multiples thereof except that one Certificate of such series may be
issued in a denomination of less than $1,000.

      The Certificates of such series shall be executed on behalf of the Trustee
by manual or facsimile signature of a Responsible Officer of the Trustee.
Certificates of any series bearing the manual or facsimile signature of an
individual who was, at the time when such signature was affixed, authorized to
sign on behalf of the Trustee shall be valid and binding obligations of the
Trustee, notwithstanding that such individual has ceased to be so authorized
prior to the authentication and delivery of such Certificates or did not hold
such office at the date of such Certificates. No Certificate of any series shall
be entitled to any benefit under this Agreement, or be valid for any purpose
unless there appears on such Certificate a certificate of authentication
substantially in the form set forth in Exhibit A hereto executed by the Trustee
by manual signature, and such certificate of authentication upon any Certificate
shall be conclusive evidence, and the only evidence, that such Certificate has
been

<PAGE>
                                                                              16


duly authenticated and delivered hereunder. All Certificates of any series shall
be dated on the date of their authentication.

      Section 3.02. Authentication of Certificates. The Trustee shall duly
authenticate and deliver Certificates of each series in authorized denominations
equalling in the aggregate the aggregate principal amount of the Equipment Notes
to be purchased by the Trustee pursuant to the related Note Purchase Agreements,
and evidencing the entire ownership of the related Trust.

      Section 3.03. Temporary Certificates. Pending the preparation of
definitive Certificates of any series, the Trustee may execute, authenticate and
deliver temporary Certificates of such series which are printed, lithographed,
typewritten, or otherwise produced, in any denomination, containing
substantially the same terms and provisions as set forth in Exhibit A hereto,
except for such appropriate insertions, omissions, substitutions and other
variations relating to their temporary nature as the officer executing such
temporary Certificates may determine, as evidenced by its execution of such
temporary Certificates.

      If temporary Certificates of any series are issued, the Company will cause
definitive Certificates of such series to be prepared without unreasonable
delay. After the preparation of definitive Certificates of such series, the
temporary Certificates shall be exchangeable for definitive Certificates upon
surrender of such temporary Certificates at the Corporate Trust Office of the
Trustee, or at the office or agency of the Trustee maintained in accordance with
Section 7.11, without charge to the holder. Upon surrender for cancellation of
any one or more temporary Certificates, the Trustee shall execute, authenticate
and deliver in exchange therefor definitive Certificates of like series, in
authorized denominations and of a like aggregate Fractional Undivided Interest.
Until so exchanged, such temporary Certificates shall in all respects be
entitled to the same benefits under this Agreement as definitive Certificates.

      Section 3.04. Registration of Transfer and Exchange of Certificates. The
Trustee shall cause to be kept at the office or agency to be maintained by it in
accordance with the provisions of Section 7.11 a register (the "Register") for
each series of Certificates in which, subject to such reasonable regulations as
it may prescribe, the Trustee shall provide for the registration of Certificates
of such series and of transfers and exchanges of such Certificates as herein
provided. The Trustee shall initially be the registrar (the "Registrar") for the
purpose of registering Certificates of each series and transfers and exchanges
of such Certificates as herein provided.

      Upon surrender for registration of transfer of any Certificate at the
Corporate Trust Office or such other office or agency, the Trustee shall
execute, authenticate and deliver, in the name of the designated transferee or
transferees, one or more new Certificates of like series, in authorized
denominations of a like aggregate Fractional Undivided Interest.

      At the option of a Certificateholder, Certificates may be exchanged for
other Certificates of like series, in authorized denominations and of a like
aggregate Fractional Undivided Interest, upon surrender of the Certificates to
be exchanged at any such office or agency. Whenever any Certificates are so
surrendered for exchange, the Trustee shall execute, authenticate and deliver
the Certificates that the Certificateholder making the exchange is entitled to
receive. Every Certificate presented or surrendered for registration of transfer
or exchange shall be duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Registrar duly executed by
the Certificateholder thereof or its attorney duly authorized in writing.

<PAGE>
                                                                              17


      No service charge shall be made to a Certificateholder for any
registration of transfer or exchange of Certificates, but the Trustee shall
require payment of a sum sufficient to cover any tax or governmental charge that
may be imposed in connection with any transfer or exchange of Certificates.

      All Certificates surrendered for registration of transfer and exchange
shall be cancelled and subsequently destroyed by the Trustee.

      Section 3.05. Mutilated, Destroyed, Lost or Stolen Certificates. If (a)
any mutilated Certificate is surrendered to the Registrar, or the Registrar
receives evidence to its satisfaction of the destruction, loss or theft of any
Certificate, and (b) there is delivered to the Registrar and the Trustee such
security, indemnity or bond, as may be required by them to save each of them
harmless, then, in the absence of notice to the Registrar or the Trustee that
such Certificate has been acquired by a bona fide purchaser, the Trustee shall
execute, authenticate and deliver, in exchange for or in lieu of any such
mutilated, destroyed, lost or stolen Certificate, a new Certificate or
Certificates of like series, in authorized denominations and of like Fractional
Undivided Interest. In connection with the issuance of any new Certificate under
this Section 3.05, the Trustee shall require the payment of a sum sufficient to
cover any tax or other governmental charge that may be imposed in relation
thereto and any other expenses (including the fees and expenses of the Trustee
and the Registrar) connected therewith. Any duplicate Certificate issued
pursuant to this Section 3.05 shall constitute conclusive evidence of the
appropriate Fractional Undivided Interest in the related Trust, as if originally
issued, whether or not the lost, stolen or destroyed Certificate shall be found
at any time.

      Section 3.06. Persons Deemed Owners. Prior to due presentation of a
Certificate for registration of transfer, the Trustee, the Registrar, and any
Paying Agent of the Trustee may treat the person in whose name any Certificate
is registered as the owner of such Certificate for the purpose of receiving
distributions pursuant to Section 4.02 and for all other purposes whatsoever,
and neither the Trustee, the Registrar, nor any Paying Agent of the Trustee
shall be affected by any notice to the contrary.

      Section 3.07. Cancellation. All Certificates surrendered for payment or
transfer or exchange shall, if surrendered to any Person party hereto other than
the Registrar, be delivered to the Registrar for cancellation. No Certificates
shall be authenticated in lieu of or in exchange for any Certificates cancelled
as provided in this Section, except as expressly permitted by this Agreement.
All cancelled Certificates held by the Registrar shall be destroyed and a
certification of their destruction delivered to the Trustee.

      Section 3.08. Limitation of Liability for Payments. All payments or
distributions made to Certificateholders of any series under the related Trust
Supplement shall be made only from the Trust Property of the related Trust and
only to the extent that the Trustee shall have sufficient income or proceeds
from such Trust Property to make such payments in accordance with the terms of
Article IV of this Agreement. Each Certificateholder, by its acceptance of a
Certificate, agrees that it will look solely to the income and proceeds from the
Trust Property of the related Trust to the extent available for distribution to
such Certificateholder as provided in this Agreement.

      Section 3.09. Book-Entry and Definitive Certificates.

      (a) Except for one Certificate of each series that may be issued in a
denomination of less than $1,000, the Certificates of any series may be issued
in the form of one or more typewritten Certificates representing the Book-Entry
Certificates of such series, to be delivered to The Depository Trust Company,
the initial Clearing Agency, by, or on behalf of, the Company. In such case, the

<PAGE>
                                                                              18


Certificates of such series delivered to The Depository Trust Company shall
initially be registered on the Register in the name of CEDE & Co., the nominee
of the initial Clearing Agency, and no Certificate Owner will receive a
definitive certificate representing such Certificate Owner's interest in the
Certificates of such series, except as provided above and in Subsection (d)
below. As to the Certificates of any series, except with respect to the one
Certificate of such series that may be issued in a denomination of less than
$1,000, unless and until definitive, fully registered Certificates (the
"Definitive Certificates") have been issued pursuant to Subsection (d) below:

            (i) the provisions of this Section 3.09 shall be in full force and
      effect;

            (ii) the Company, the Paying Agent, the Registrar and the Trustee
      may deal with the Clearing Agency Participants for all purposes (including
      the making of distributions on the Certificates) as the authorized
      representatives of the Certificate Owners;

            (iii) to the extent that the provisions of this Section 3.09
      conflict with any other provisions of this Agreement (other than the
      provisions of any Trust Supplement amending this Section 3.09 as permitted
      by this Basic Agreement), the provisions of this Section 3.09 shall
      control;

            (iv) the rights of Certificate Owners shall be exercised only
      through the Clearing Agency and shall be limited to those established by
      law and agreements between such Certificate Owners and the Clearing Agency
      Participants; and until Definitive Certificates are issued pursuant to
      Subsection (d) below, the Clearing Agency will make book-entry transfers
      among the Clearing Agency Participants and receive and transmit
      distributions of principal and interest and premium, if any, on the
      Certificates to such Clearing Agency Participants; and

            (v) whenever this Agreement requires or permits actions to be taken
      based upon instructions or directions of Certificateholders of such series
      holding Certificates of such series evidencing a specified percentage of
      the Fractional Undivided Interests in the related Trust, the Clearing
      Agency shall be deemed to represent such percentage only to the extent
      that it has received instructions to such effect from Certificate Owners
      and/or Clearing Agency Participants owning or representing, respectively,
      such required percentage of the beneficial interest in Certificates of
      such series and has delivered such instructions to the Trustee. The
      Trustee shall have no obligation to determine whether the Clearing Agency
      has in fact received any such instructions.

      (b) Except with respect to the one Certificate of each series that may be
issued in a denomination of less than $1,000, whenever notice or other
communication to the Certificateholders of such series is required under this
Agreement, unless and until Definitive Certificates shall have been issued
pursuant to Subsection (d) below, the Trustee shall give all such notices and
communications specified herein to be given to Certificateholders of such series
to the Clearing Agency.

      (c) Unless and until Definitive Certificates of a series are issued
pursuant to Subsection (d) below, on the Record Date prior to each applicable
Regular Distribution Date and Special Distribution Date, the Trustee will
request from the Clearing Agency a Securities Position Listing setting forth the
names of all Clearing Agency Participants reflected on the Clearing Agency's
books as holding interests in the Certificates on such Record Date.

<PAGE>
                                                                              19


      (d) If with respect to the Certificates of any series (i) the Company
advises the Trustee in writing that the Clearing Agency is no longer willing or
able to properly discharge its responsibilities and the Trustee or the Company
is unable to locate a qualified successor, (ii) the Company at its option,
advises the Trustee in writing that it elects to terminate the book-entry system
through the Clearing Agency or (iii) after the occurrence of an Event of
Default, Certificate Owners of Book-Entry Certificates of such series evidencing
Fractional Undivided Interests aggregating not less than a majority in interest
in the related Trust, by Act of said Certificate Owners delivered to the Company
and the Trustee, advise the Company, the Trustee and the Clearing Agency through
the Clearing Agency Participants in writing that the continuation of a
book-entry system through the Clearing Agency Participants is no longer in the
best interests of the Certificate Owners of such series, then the Trustee shall
notify all Certificate Owners of such series, through the Clearing Agency, of
the occurrence of any such event and of the availability of Definitive
Certificates. Upon surrender to the Trustee of all the Certificates of such
series held by the Clearing Agency, accompanied by registration instructions
from the Clearing Agency Participants for registration of Definitive
Certificates in the names of Certificate Owners of such series, the Trustee
shall issue and deliver the Definitive Certificates of such series in accordance
with the instructions of the Clearing Agency. Neither the Company, the
Registrar, the Paying Agent nor the Trustee shall be liable for any delay in
delivery of such instructions and may conclusively rely on, and shall be
protected in relying on, such registration instructions. Upon the issuance of
Definitive Certificates of such series, the Trustee shall recognize the Person
in whose name the Definitive Certificates are registered in the Register as
Certificateholders hereunder. Neither the Company nor the Trustee shall be
liable if the Trustee or the Company is unable to locate a qualified successor
Clearing Agency.

      (e) Except as otherwise provided in the related Trust Supplement, the
Trustee shall enter into the applicable Letter of Representations with respect
to such series of Certificates and fulfill its responsibilities thereunder.

      (f) The provisions of this Section 3.09 may be made inapplicable to any
series or may be amended with respect to any series in the related Trust
Supplement.

                                   ARTICLE IV

                          DISTRIBUTIONS; STATEMENTS TO
                               CERTIFICATEHOLDERS

      Section 4.01. Certificate Account and Special Payments Account.

      (a) The Trustee shall establish and maintain on behalf of the
Certificateholders of each series a Certificate Account as one or more
non-interest-bearing accounts. The Trustee shall hold the Certificate Account in
trust for the benefit of the Certificateholders of such series, and shall make
or permit withdrawals therefrom only as provided in this Agreement. On each day
when a Scheduled Payment is made to the Trustee, the Trustee, upon receipt
thereof, shall immediately deposit the aggregate amount of such Scheduled
Payment into the Certificate Account.

      (b) The Trustee shall establish and maintain on behalf of the
Certificateholders of each series a Special Payments Account as one or more
accounts, which shall be non-interest bearing except as provided in Section
4.04. The Trustee shall hold the Special Payments Account in trust for the
benefit of the Certificateholders of such series, and shall make or permit
withdrawals therefrom only as provided in this Agreement. On each day when one
or more Special Payments are made to the

<PAGE>
                                                                              20


Trustee, the Trustee, upon receipt thereof, shall immediately deposit the
aggregate amount of such Special Payments into the Special Payments Account.

      (c) The Trustee shall present to the Loan Trustee to which an Equipment
Note relates such Equipment Note on the date of its stated final maturity or, in
the case of any Equipment Note which is to be redeemed in whole pursuant to the
relevant Indenture, on the applicable redemption date under such Indenture.

      Section 4.02. Distributions from Certificate Account and Special Payments
Account.

      (a) On each Regular Distribution Date with respect to a series of
Certificates or as soon thereafter as the Trustee has confirmed receipt of the
payment of the Scheduled Payments due on the Equipment Notes held in the related
Trust on such date, the Trustee shall distribute out of the applicable
Certificate Account the entire amount deposited therein pursuant to Section
4.01(a). There shall be so distributed to each Certificateholder of record of
such series on the Record Date with respect to such Regular Distribution Date
(other than as provided in Section 11.01 concerning the final distribution), by
check mailed to such Certificateholder at the address appearing in the Register,
such Certificateholder's pro rata share (based on the aggregate Fractional
Undivided Interest in the related Trust held by such Certificateholder) of the
aggregate amount in the applicable Certificate Account.

      (b) On each Special Distribution Date with respect to any Special Payment
with respect to a series of Certificates or as soon thereafter as the Trustee
has confirmed receipt of the Special Payments due on the Equipment Notes held in
the related Trust or realized upon the sale of such Equipment Note, the Trustee
shall distribute out of the applicable Special Payments Account the entire
amount deposited therein pursuant to Section 4.01(b) of such Special Payment.
There shall be so distributed to each Certificateholder of record of such series
on the Record Date with respect to such Special Distribution Date (other than as
provided in Section 11.01 concerning the final distribution), by check mailed to
such Certificateholder at the address appearing in the Register, such
Certificateholder's pro rata share (based on the aggregate Fractional Undivided
Interest in the related Trust held by such Certificateholder) of the aggregate
amount in the applicable Special Payments Account on account of such Special
Payment.

      (c) The Trustee shall, at the expense of the Company, cause notice of each
Special Payment with respect to a series of Certificates to be mailed to each
Certificateholder of such series at his address as it appears in the Register.
In the event of redemption or purchase of Equipment Notes held in the related
Trust, such notice shall be mailed not less than 20 days prior to the date any
such Special Payment is scheduled to be distributed. In the case of any other
Special Payments, such notice shall be mailed as soon as practicable after the
Trustee has confirmed that it has received funds for such Special Payment.
Notices mailed by the Trustee shall set forth:

            (i) the Special Distribution Date and the Record Date therefor
      (except as otherwise provided in Section 11.01),

            (ii) the amount of the Special Payment for each $1,000 face amount
      Certificate (taking into account any payment to be made by the Company
      pursuant to Section 2.02(b)) and the amount thereof constituting
      principal, premium, if any, and interest,

            (iii) the reason for the Special Payment, and

<PAGE>
                                                                              21


            (iv) if the Special Distribution Date is the same date as a Regular
      Distribution Date for the Certificates of such series, the total amount to
      be received on such date for each $1,000 face amount Certificate.

      If the amount of premium, if any, payable upon the redemption or purchase
of an Equipment Note has not been calculated at the time that the Trustee mails
notice of a Special Payment, it shall be sufficient if the notice sets forth the
other amounts to be distributed and states that any premium received will also
be distributed.

      If any redemption of the Equipment Notes held in any Trust is cancelled,
the Trustee, as soon as possible after learning thereof, shall cause notice
thereof to be mailed to each Certificateholder of the related series at its
address as it appears on the Register.

      Section 4.03. Statements to Certificateholders.

      (a) On each Regular Distribution Date and Special Distribution Date with
respect to a series of Certificates, the Trustee will include with each
distribution to Certificateholders of the related series a statement, giving
effect to such distribution to be made on such Regular Distribution Date or
Special Distribution Date, as the case may be, setting forth the following
information (per a $1,000 face amount Certificate as to (i) and (ii) below):

            (i) The amount of such distribution allocable to principal and the
      amount allocable to premium, if any;

            (ii) The amount of such distribution allocable to interest; and

            (iii) The Pool Balance and the Pool Factor of the related Trust.

            With respect to the Certificates registered in the name of a
Clearing Agency or its nominee, on the record date prior to each Distribution
Date, the Trustee will request from the Clearing Agency a securities position
listing setting forth the names of all the Clearing Agency Participants
reflected on the Clearing Agency's books as holding interests in the
Certificates on such record date. On each Distribution Date, the applicable
Trustee will mail to each such Clearing Agency Participant the statement
described above and will make available additional copies as requested by such
Clearing Agency Participant for forwarding to holders of Certificates.

      (b) Within a reasonable period of time after the end of each calendar year
but not later than the latest date permitted by law, the Trustee shall furnish
to each Person who at any time during such calendar year was a Certificateholder
of record a statement containing the sum of the amounts determined pursuant to
clauses (a)(i) and (a)(ii) with respect to the related Trust for such calendar
year or, in the event such Person was a Certificateholder of record during a
portion of such calendar year, for the applicable portion of such year, and such
other items as are readily available to the Trustee and which a
Certificateholder shall reasonably request as necessary for the purpose of such
Certificateholder's preparation of its Federal income tax returns. With respect
to Certificates registered in the name of a Clearing Agency or its nominee, such
report and such other items shall be prepared on the basis of information
supplied to the Trustees by the Clearing Agency Participants and shall be
delivered by the Trustee to such Clearing Agency Participants to be available
for forwarding by such Clearing Agency Participants.

<PAGE>
                                                                              22


      Section 4.04. Investment of Special Payment Moneys. Any money received by
the Trustee pursuant to Section 4.01(b) representing a Special Payment which is
not to be promptly distributed shall, to the extent practicable, be invested in
Permitted Investments by the Trustee as directed in writing by the Company
pending distribution of such Special Payment pursuant to Section 4.02. Any
investment made pursuant to this Section 4.04 shall be in such Permitted
Investments having maturities not later than the date that such moneys are
required to be used to make the payment required under Section 4.02 on the
applicable Special Distribution Date and the Trustee shall hold any such
Permitted Investments until maturity. The Trustee shall have no liability with
respect to any investment made pursuant to this Section 4.04, other than by
reason of the willful misconduct or negligence of the Trustee. All income and
earnings from such investments shall be distributed on such Special Distribution
Date as part of such Special Payment.

                                    ARTICLE V

                                   THE COMPANY

      Section 5.01. Maintenance of Corporate Existence. The Company, at its own
cost and expense, will do or cause to be done all things necessary to preserve
and keep in full force and effect its corporate existence, rights and
franchises, except as otherwise specifically permitted in Section 5.02;
provided, however, that the Company shall not be required to preserve any right
or franchise if the Company shall determine that the preservation thereof is no
longer desirable in the conduct of the business of the Company.

      Section 5.02. Consolidation, Merger, etc. The Company shall not
consolidate with or merge into any other corporation or convey, transfer or
lease substantially all of its assets as an entirety to any Person unless:

      (a) the corporation formed by such consolidation or into which the Company
is merged or the Person which acquires by conveyance, transfer or lease
substantially all of the assets of the Company as an entirety shall be a
"citizen of the United States" (as defined in Section 40102(a)(15) of Title 49
of the United States Code) holding a carrier operating certificate issued by the
Secretary of Transportation pursuant to Chapter 447 of Title 49, United States
Code, for aircraft capable of carrying 10 or more individuals or 6,000 pounds or
more of cargo and with respect to which there is in force an air carrier
operating certificate issued pursuant to Part 121 of the regulations under the
sections of Title 49, United States Code, relating to aviation;

      (b) the corporation formed by such consolidation or into which the Company
is merged or the Person which acquires by conveyance, transfer or lease
substantially all of the assets of the Company as an entirety shall execute and
deliver to the Trustee applicable to the Certificates of each series a duly
authorized, valid, binding and enforceable agreement in form and substance
reasonably satisfactory to the Trustee containing an assumption by such
successor corporation or Person of the due and punctual performance and
observance of each covenant and condition of the Note Documents and of this
Agreement applicable to the Certificates of each series to be performed or
observed by the Company;

      (c) immediately after giving effect to such transaction, no Event of
Default applicable to the Certificates of each series or event which is, or
after notice or passage of time, or both, would be, such an Event of Default
shall have occurred and be continuing; and

<PAGE>
                                                                              23


      (d) the Company shall have delivered to the Trustee an Officers'
Certificate of the Company and an Opinion of Counsel of the Company (which may
be the Company's General Counsel) reasonably satisfactory to the Trustee, each
stating that such consolidation, merger, conveyance, transfer or lease and the
assumption agreement mentioned in clause (b) above comply with this Section 5.02
and that all conditions precedent herein provided for relating to such
transaction have been complied with.

      Upon any consolidation or merger, or any conveyance, transfer or lease of
substantially all of the assets of the Company as an entirety in accordance with
this Section 5.02, the successor corporation or Person formed by such
consolidation or into which the Company is merged or to which such conveyance,
transfer or lease is made shall succeed to, and be substituted for, and may
exercise every right and power of, the Company under this Agreement applicable
to the Certificates of each series with the same effect as if such successor
corporation or Person had been named as the Company herein. No such conveyance,
transfer or lease of substantially all of the assets of the Company as an
entirety shall have the effect of releasing the Company or any successor
corporation or Person which shall theretofore have become such in the manner
prescribed in this Section 5.02 from its liability in respect of any Note
Document and of this Agreement applicable to the Certificates of such series to
which it is a party.

                                   ARTICLE VI

                                     DEFAULT

      Section 6.01. Events of Default. (a) Exercise of Remedies: Upon the
occurrence and during the continuation of any Indenture Default under any
Indenture, the Trustee may, to the extent it is the Controlling Party at such
time, direct the exercise of remedies.

            (b) Purchase Rights of Certificateholders: By acceptance of its
Certificate, each Certificateholder agrees that at any time after the occurrence
and during the continuation of a Triggering Event, each Certificateholder of
Certificates of a series will have certain rights, the exercise of which will be
specified in the applicable Trust Supplement, to purchase the class of
Certificates with immediate seniority to the Certificates held by the purchasing
Certificateholder. The purchase price with respect to the Certificates of any
series shall be equal to the Pool Balance of the Certificates of such series,
together with accrued and unpaid interest thereon to the date of such purchase,
without premium, but including any other amounts then due and payable to the
Certificateholders under this Agreement, any Intercreditor Agreement or any
other Note Document or on or in respect of the Certificates of such series;
provided, however, that no such purchase of Certificates of such series shall be
effective unless the purchaser shall certify to the Trustee that
contemporaneously with such purchase, such purchaser is purchasing, pursuant to
the terms of this Agreement and the other Agreements, if any, relating to
Certificates of a series that are subject to the same Intercreditor Agreement
(such other Agreements, the "Other Agreements"), the Certificates of each such
series that is senior to the Certificates held by such purchaser. Each payment
of the purchase price of the Certificates of any series shall be made to an
account or accounts designated by the Trustee and each such purchase shall be
subject to the terms of this Section. Each Certificateholder of any series
agrees by its acceptance of Certificates of such series that it will, upon
payment from any such Certificateholders of Certificates with a lower seniority
of the purchase price specified herein, forthwith sell, assign, transfer and
convey to the purchaser thereof (without recourse, representation or warranty of
any kind except for its own acts), all of the right, title, interest and
obligation of such Certificateholder in this Agreement, any Intercreditor
Agreement, the Liquidity Facility, the Note

<PAGE>
                                                                              24


Documents and all Certificates of such series held by such Certificateholder
(excluding all right, title and interest under any of the foregoing to the
extent such right, title or interest is with respect to an obligation not then
due and payable as respects any action or inaction or state of affairs occurring
prior to such sale) and the purchaser shall assume all of such
Certificateholder's obligations under this Agreement, any Intercreditor
Agreement, the Liquidity Facility and the Note Documents. The Certificates of
such series will be deemed to be purchased on the date payment of the purchase
price is made notwithstanding the failure of the Certificateholders to deliver
any Certificates of such series and, upon such a purchase, (i) the only rights
of the Certificateholders will be to deliver the Certificates to the purchaser
and receive the purchase price for such Certificates of such series and (ii) if
the purchaser shall so request, such Certificateholder will comply with all of
the provisions of Section 3.04 hereof to enable new Certificates of such series
to be issued to the purchaser in such denominations as it shall request. All
charges and expenses in connection with the issuance of any such new
Certificates shall be borne by the purchaser thereof.

      Section 6.02. Incidents of Sale of Equipment Notes. Upon any sale of all
or any part of the Equipment Notes made either under the power of sale given
under this Agreement or otherwise for the enforcement of this Agreement, the
following shall be applicable:

            (1) Certificateholders and Trustee May Purchase Equipment Notes. Any
      Certificateholder, the Trustee in its individual or any other capacity or
      any other Person may bid for and purchase any of the Equipment Notes, and
      upon compliance with the terms of sale, may hold, retain, possess and
      dispose of such Equipment Notes in their own absolute right without
      further accountability.

            (2) Receipt of Trustee Shall Discharge Purchaser. The receipt of the
      Trustee or of the officer making such sale shall be a sufficient discharge
      to any purchaser for his purchase money, and, after paying such purchase
      money and receiving such receipt, such purchaser or its personal
      representative or assigns shall not be obliged to see to the application
      of such purchase money, or be in any way answerable for any loss,
      misapplication or non-application thereof.

            (3) Application of Moneys Received upon Sale. Any moneys collected
      by the Trustee upon any sale made either under the power of sale given by
      this Agreement or otherwise for the enforcement of this Agreement shall be
      applied as provided in Section 4.02.

      Section 6.03. Judicial Proceedings Instituted by Trustee; Trustee May
Bring Suit. If there shall be a failure to make payment of the principal of,
premium, if any, or interest on any Equipment Note, or if there shall be any
failure to pay Rent (as defined in the relevant Lease) under any Lease when due
and payable, then the Trustee, in its own name, and as trustee of an express
trust, as holder of such Equipment Notes, to the extent permitted by and in
accordance with the terms of any Intercreditor Agreement and any Note Documents,
shall be entitled and empowered to institute any suits, actions or proceedings
at law, in equity or otherwise, for the collection of the sums so due and unpaid
on such Equipment Notes or under such Lease and may prosecute any such claim or
proceeding to judgment or final decree with respect to the whole amount of any
such sums so due and unpaid.

      Section 6.04. Control by Certificateholders. Subject to Section 6.03 and
any Intercreditor Agreement, the Certificateholders holding Certificates of a
series evidencing Fractional Undivided Interests aggregating not less than a
majority in interest in the related Trust shall have the right to direct the
time, method and place of conducting any proceeding for any remedy available to
the Trustee with

<PAGE>
                                                                              25


respect to such Trust or pursuant to the terms of any Intercreditor Agreement,
or exercising any trust or power conferred on the Trustee under this Agreement
or any Intercreditor Agreement, including any right of the Trustee as
Controlling Party under any Intercreditor Agreement or as holder of the
Equipment Notes, provided that

            (1) such Direction shall not in the opinion of the Trustee be in
      conflict with any rule of law or with this Agreement and would not involve
      the Trustee in personal liability or expense,

            (2) the Trustee shall not determine that the action so directed
      would be unjustly prejudicial to the Certificateholders of such series not
      taking part in such Direction, and

            (3) the Trustee may take any other action deemed proper by the
      Trustee which is not inconsistent with such Direction.

      Section 6.05. Waiver of Past Defaults. Subject to any Intercreditor
Agreement, the Certificateholders holding Certificates of a series evidencing
Fractional Undivided Interests aggregating not less than a majority in interest
in the Trust (i) may on behalf of all of the Certificateholders waive any past
Event of Default hereunder and its consequences or (ii) if the Trustee is the
Controlling Party, may direct the Trustee to instruct the applicable Loan
Trustee to waive, any past Indenture Default under any Indenture and its
consequences, and thereby annul any Direction given by such Certificateholders
or the Trustee to such Loan Trustee with respect thereto, except a default:

            (1) in the deposit of any Scheduled Payment or Special Payment under
      Section 4.01 or in the distribution of any payment under Section 4.02 on
      the Certificates of a series, or

            (2) in the payment of the principal of (premium, if any) or interest
      on the Equipment Notes, or

            (3) in respect of a covenant or provision hereof which under Article
      IX hereof cannot be modified or amended without the consent of each
      Certificateholder holding an Outstanding Certificate of a series affected
      thereby.

            Upon any such waiver, such default shall cease to exist with respect
to Certificates of such series and any Event of Default arising therefrom shall
be deemed to have been cured for every purpose and any direction given by the
Trustee on behalf of the Certificateholders of such series to the relevant Loan
Trustee shall be annulled with respect thereto; but no such waiver shall extend
to any subsequent or other default or Event of Default or impair any right
consequent thereon. Upon any such waiver, the Trustee shall vote the Equipment
Notes issued under the relevant Indenture to waive the corresponding Indenture
Default.

      Section 6.06. Right of Certificateholders to Receive Payments Not To Be
Impaired. Anything in this Agreement to the contrary notwithstanding, including
without limitation Section 6.07 hereof, but subject to any Intercreditor
Agreement, the right of any Certificateholder to receive distributions of
payments required pursuant to Section 4.02 hereof on the applicable Certificates
when due, or to institute suit for the enforcement of any such payment on or
after the applicable Regular Distribution Date or Special Distribution Date,
shall not be impaired or affected without the consent of such Certificateholder.

<PAGE>
                                                                              26


      Section 6.07. Certificateholders May Not Bring Suit Except Under Certain
Conditions. A Certificateholder of any series shall not have the right to
institute any suit, action or proceeding at law or in equity or otherwise with
respect to this Agreement, for the appointment of a receiver or for the
enforcement of any other remedy under this Agreement, unless:

            (1) such Certificateholder previously shall have given written
      notice to the Trustee of a continuing Event of Default;

            (2) the Certificateholders holding Certificates of such series
      evidencing Fractional Undivided Interests aggregating not less than 25% of
      the related Trust shall have requested the Trustee in writing to institute
      such action, suit or proceeding and shall have offered to the Trustee
      indemnity as provided in Section 7.02(e);

            (3) the Trustee shall have refused or neglected to institute any
      such action, suit or proceeding for 60 days after receipt of such notice,
      request and offer of indemnity; and

            (4) no direction inconsistent with such written request has been
      given to the Trustee during such 60-day period by the Certificateholders
      holding Certificates of such series evidencing Fractional Undivided
      Interests aggregating not less than a majority in interest in the related
      Trust.

      It is understood and intended that no one or more of the
Certificateholders of any series shall have any right in any manner whatever
hereunder or under the related Trust Supplement or under the Certificates of
such series to (i) surrender, impair, waive, affect, disturb or prejudice any
property in the Trust Property of the related Trust or the lien of any related
Indenture on any property subject thereto, or the rights of the
Certificateholders of such series or the holders of the related Equipment Notes,
(ii) obtain or seek to obtain priority over or preference to any other such
Certificateholder of such series or (iii) enforce any right under this
Agreement, except in the manner herein provided and for the equal, ratable and
common benefit of all the Certificateholders of such series subject to the
provisions of this Agreement.

      Section 6.08. Remedies Cumulative. Every remedy given hereunder to the
Trustee or to any of the Certificateholders of any series shall not be exclusive
of any other remedy or remedies, and every such remedy shall be cumulative and
in addition to every other remedy given hereunder or now or hereafter given by
statute, law, equity or otherwise.

      Section 6.09. Undertaking for Costs. In any suit for the enforcement of
any right or remedy under this Agreement, or in any suit against the Trustee for
any action taken, suffered or omitted by it as Trustee, a court may require any
party litigant in such suit to file an undertaking to pay the costs of such
suit, and may assess costs against any such party litigant, in the manner and to
the extent provided in the Trust Indenture Act; provided that neither this
Section nor the Trust Indenture Act shall be deemed to authorize any court to
require such an undertaking or to make such an assessment in any suit instituted
by the Company or the Guarantor.

<PAGE>
                                                                              27


                                   ARTICLE VII

                                   THE TRUSTEE

      Section 7.01. Notice of Defaults. As promptly as practicable after, and in
any event within 90 days after the occurrence of any default (as such term is
defined below) hereunder known to the Trustee, the Trustee shall transmit by
mail to the Company, any related Owner Trustees, the related Loan Trustees and
the Certificateholders holding Certificates of the related series in accordance
with Section 313(c) of the Trust Indenture Act, notice of such default hereunder
known to the Trustee, unless such default shall have been cured or waived;
provided, however, that, except in the case of a default in the payment of the
principal of (premium, if any) or interest on any Equipment Note, the Trustee
shall be protected in withholding such notice if and so long as the board of
directors, the executive committee or a trust committee of directors and/or
Responsible Officers of the Trustee in good faith determine that the withholding
of such notice is in the interests of the Certificateholders of the related
series. For the purpose of this Section in respect of any Trust, the term
"default" means any event that is, or after notice or lapse of time or both
would become, an Event of Default in respect of that Trust.

      Section 7.02. Certain Rights of Trustee. Subject to the provisions of
Section 315 of the Trust Indenture Act:

      (a) the Trustee may rely and shall be protected in acting or refraining
from acting in reliance upon any resolution, certificate, statement, instrument,
opinion, report, notice, request, direction, consent, order, bond, debenture or
other paper or document believed by it to be genuine and to have been signed or
presented by the proper party or parties;

      (b) any request or direction of the Company mentioned herein shall be
sufficiently evidenced by a Request;

      (c) whenever in the administration of this Agreement or any Intercreditor
Agreement the Trustee shall deem it desirable that a matter be proved or
established prior to taking, suffering or omitting any action hereunder, the
Trustee (unless other evidence be herein specifically prescribed) may, in the
absence of bad faith on its part, rely upon an Officers' Certificate of the
Company, any related Owner Trustee or any related Loan Trustee;

      (d) the Trustee may consult with counsel and the advice of such counsel or
any Opinion of Counsel shall be full and complete authorization and protection
in respect of any action taken, suffered or omitted by it hereunder in good
faith and in reliance thereon;

      (e) the Trustee shall be under no obligation to exercise any of the rights
or powers vested in it by this Agreement or any Intercreditor Agreement at the
request or direction of any of the Certificateholders pursuant to this Agreement
or any Intercreditor Agreement unless such Certificateholders shall have offered
to the Trustee reasonable security or indemnity against the cost, expenses and
liabilities which might be incurred by it in compliance with such request or
direction;

      (f) the Trustee shall not be bound to make any investigation into the
facts or matters stated in any resolution, certificate, statement, instrument,
opinion, or report, notice, request, direction, consent, order, bond, debenture
or other paper or document;

<PAGE>
                                                                              28


      (g) the Trustee may execute any of the trusts or powers under this
Agreement or Intercreditor Agreement or perform any duties under this Agreement
or any Intercreditor Agreement either directly or by or through agents or
attorneys and the Trustee shall not be responsible for any misconduct or
negligence on the part of any agent or attorney appointed with due care by it
under this Agreement or any Intercreditor Agreement;

      (h) the Trustee shall not be liable with respect to any action taken or
omitted to be taken by it in good faith in accordance with the direction of the
Certificateholders holding Certificates of any series evidencing Fractional
Undivided Interests aggregating not less than a majority in interest in the
related Trust relating to the time, method and place of conducting any
proceeding for any remedy available to the Trustee, or exercising any trust or
power conferred upon the Trustee, under this Agreement or any Intercreditor
Agreement; and

      (i) the Trustee shall not be required to expend or risk its own funds in
the performance of any of its duties under this Agreement, or in the exercise of
any of its rights or powers, if it shall have reasonable grounds for believing
that repayment of such funds or adequate indemnity against such risk is not
reasonably assured to it.

      (j) except during the continuance of an Event of Default, the Trustee
undertakes and shall be responsible to perform only such duties as are
specifically set forth herein and no implied covenants or obligations shall be
read into this Agreement or be enforceable against Trustee.

      Section 7.03. Not Responsible for Recitals or Issuance of Certificates.
The recitals contained herein and in the Certificates of each series, except the
certificates of authentication, shall not be taken as the statements of the
Trustee, and the Trustee assumes no responsibility for their correctness.
Subject to Section 7.14, the Trustee makes no representations as to the validity
or sufficiency of this Basic Agreement or any Trust Supplement, any Note
Documents, any Note Purchase Agreement or any Intercreditor Agreement, any
Equipment Notes or the Certificates of any series, except that the Trustee
hereby represents and warrants that this Basic Agreement has been, and each
Trust Supplement, each Certificate and each Intercreditor Agreement of, or
relating to, each series will be, executed and delivered by one of its officers
who is duly authorized to execute and deliver such document on its behalf.

      Section 7.04. May Hold Certificates. The Trustee, any Paying Agent,
Registrar or any of their Affiliates or any other agent, in their respective
individual or any other capacity, may become the owner or pledgee of
Certificates and subject to Sections 310(b) and 311 of the Trust Indenture Act
may otherwise deal with the Company, the Guarantor, any Owner Trustees or the
Loan Trustees with the same rights it would have if it were not Trustee, Paying
Agent, Registrar or such other agent.

      Section 7.05. Money Held in Trust. Money held by the Trustee or the Paying
Agent in trust hereunder or under any Trust Supplement need not be segregated
from other funds except to the extent required herein or by law and neither the
Trustee nor the Paying Agent shall have any liability for interest upon any such
moneys except as provided for herein.

      Section 7.06. Compensation and Reimbursement. The Company agrees:

            (1) to pay, or cause to be paid, to the Trustee from time to time
      reasonable compensation for all services rendered by it hereunder (which
      compensation shall not be limited by any provision of law in regard to the
      compensation of a trustee of an express trust);

<PAGE>
                                                                              29


            (2) except as otherwise expressly provided herein or in any Trust
      Supplement, to reimburse, or cause to be reimbursed, the Trustee upon its
      request for all reasonable out-of-pocket expenses, disbursements and
      advances incurred or made by the Trustee in accordance with any provision
      of this Basic Agreement, any Trust Supplement or any Intercreditor
      Agreement (including the reasonable compensation and the expenses and
      disbursements of its agents and counsel), except any such expense,
      disbursement or advance as may be attributable to its negligence, willful
      misconduct or bad faith or as may be incurred due to the Trustee's breach
      of its representations and warranties set forth in Section 7.14;

            (3) to indemnify, or cause to be indemnified, the Trustee for, and
      to hold it harmless against, any loss, liability or expense (other than
      for or with respect to any tax) incurred without negligence, willful
      misconduct or bad faith, on its part, arising out of or in connection with
      the acceptance or administration of this Trust, including the costs and
      expenses of defending itself against any claim or liability in connection
      with the exercise or performance of any of its powers or duties hereunder,
      except for any such loss, liability or expense incurred by reason of the
      Trustee's breach of its representations and warranties set forth in
      Section 7.14. The Trustee shall notify the Company and the Guarantor
      promptly of any claim for which it may seek indemnity. The Company and the
      Guarantor shall defend the claim and the Trustee shall cooperate in the
      defense. The Trustee may have separate counsel with the consent of the
      Company and the Guarantor and the Company and the Guarantor will pay the
      reasonable fees and expenses of such counsel. Neither the Company nor the
      Guarantor need pay for any settlement made without its consent; and

            (4) to indemnify, or cause to be indemnified, the Trustee, solely in
      its individual capacity, for, and to hold it harmless against, any tax
      (except to the extent the Trustee is reimbursed therefor pursuant to the
      next paragraph, provided that no indemnification shall be available with
      respect to any tax attributable to the Trustee's compensation for serving
      as such) incurred without negligence, willful misconduct or bad faith, on
      its part, arising out of or in connection with the acceptance or
      administration of this Trust, including any costs and expenses incurred in
      contesting the imposition of any such tax. The Trustee, in its individual
      capacity, shall notify the Company and the Guarantor promptly of any claim
      for any tax for which it may seek indemnity. The Trustee shall permit the
      Company and the Guarantor to contest the imposition of such tax and the
      Trustee, in its individual capacity, shall cooperate in the defense. The
      Trustee, in its individual capacity, may have separate counsel with the
      consent of the Company and the Guarantor and the Company and the Guarantor
      will pay the reasonable fees and expenses of such counsel. Neither the
      Company nor the Guarantor need pay for any taxes paid, in settlement or
      otherwise, without its consent.

      The Trustee shall be entitled to reimbursement from, and shall have a lien
prior to the Certificates of each series upon, all property and funds held or
collected by the Trustee in its capacity as Trustee with respect to such series
or the related Trust for any tax incurred without negligence, bad faith or
willful misconduct, on its part, arising out of or in connection with the
acceptance or administration of such Trust (other than any tax attributable to
the Trustee's compensation for serving as such), including any costs and
expenses incurred in contesting the imposition of any such tax. The Trustee
shall notify the Company of any claim for any tax for which it may seek
reimbursement. The Trustee shall cooperate in the contest by the Company of any
such claim. If the Trustee reimburses itself from the Trust Property of such
Trust for any such tax it will within 30 days mail a brief report setting forth
the amount of such tax and the circumstances thereof to all Certificateholders
of such series as their names and addresses appear in the Register.

<PAGE>
                                                                              30


      As security for the performance of the obligations of the Company under
this Section with respect to each Trust the Trustee shall have a lien prior to
the Certificates of the related series upon all property and funds held or
collected by the Trustee in its capacity as Trustee with respect to such
Certificates and the related Trust.

      Section 7.07. Corporate Trustee Required; Eligibility. Each Trust shall at
all times have a Trustee which shall be eligible to act as a trustee under
Section 310(a) of the Trust Indenture Act and shall have a combined capital and
surplus of at least $75,000,000 (or a combined capital and surplus in excess of
$5,000,000 and the obligations of which, whether now in existence or hereafter
incurred, are fully and unconditionally guaranteed by a corporation organized
and doing business under the laws of the United States, any State or Territory
thereof or of the District of Columbia that has a combined capital and surplus
of at least $75,000,000). If such corporation publishes reports of conditions at
least annually, pursuant to law or to the requirements of Federal, State,
Territorial or District of Columbia supervising or examining authority, then for
the purposes of this Section 7.07, the combined capital and surplus of such
corporation shall be deemed to be its combined capital and surplus as set forth
in its most recent report of conditions so published.

      In case at any time the Trustee shall cease to be eligible in accordance
with the provisions of this Section 7.07 to act as Trustee of any Trust, the
Trustee shall resign immediately as Trustee of such Trust in the manner and with
the effect specified in Section 7.08.

      Section 7.08. Resignation and Removal; Appointment of Successor.

      (a) No resignation or removal of the Trustee and no appointment of a
successor Trustee of any Trust pursuant to this Article shall become effective
until the acceptance of appointment by the successor Trustee under Section 7.09.

      (b) The Trustee may resign at any time as trustee of any or all Trusts by
giving written notice thereof to the Company, the Authorized Agents, the related
Owner Trustees and the related Loan Trustees. If an instrument of acceptance by
a successor Trustee shall not have been delivered to the Company, the related
Owner Trustees and the Trustee within 30 days after the giving of such notice of
resignation, the resigning Trustee may petition any court of competent
jurisdiction for the appointment of a successor Trustee.

      (c) The Trustee may be removed at any time as trustee of any Trust by Act
of the Certificateholders of the related series holding Certificates of such
series evidencing Fractional Undivided Interests aggregating not less than a
majority in interest in such Trust delivered to the Trustee and to the Company,
the related Owner Trustees and the related Loan Trustees.

      (d) If at any time in respect of any Trust:

            (1) the Trustee shall fail to comply with Section 310 of the Trust
      Indenture Act after written request therefor by the Company or by any
      Certificateholder of the related series who has been a bona fide
      certificateholder for at least six months; or

            (2) the Trustee shall cease to be eligible under Section 7.07 and
      shall fail to resign after written request therefor by the Company or by
      any such Certificateholder; or

<PAGE>
                                                                              31


            (3) the Trustee shall become incapable of acting or shall be
      adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
      property shall be appointed or any public officer shall take charge or
      control of the Trustee or of its property or affairs for the purpose of
      rehabilitation, conservation or liquidation;

then, in any case, (i) the Company may remove the Trustee or (ii) any
Certificateholder of the related series who has been a bona fide
Certificateholder for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee of such Trust.

      (e) If a Responsible Officer of the Trustee shall obtain actual knowledge
of an Avoidable Tax (as hereinafter defined) in respect of any Trust which has
been or is likely to be asserted, the Trustee shall promptly notify the Company
and shall, within 30 days of such notification, resign as Trustee of such Trust
hereunder unless within such 30-day period the Trustee shall have received
notice that the Company has agreed to pay such tax. The Company shall promptly
appoint a successor Trustee of such Trust in a jurisdiction where there are no
Avoidable Taxes. As used herein, an "Avoidable Tax" in respect of such Trust
means a state or local tax: (i) upon (w) such Trust, (x) such Trust Property,
(y) Certificateholders of such Trust or (z) the Trustee for which the Trustee is
entitled to seek reimbursement from the Trust Property of such Trust, and (ii)
which would be avoided if the Trustee were located in another state, or
jurisdiction within a state, within the United States. A tax shall not be an
Avoidable Tax in respect of any Trust if the Company or any Owner Trustee shall
agree to pay, and shall pay, such tax.

      (f) If the Trustee shall resign, be removed or become incapable of acting
as trustee of any Trust, or if a vacancy shall occur in the office of the
Trustee of any Trust for any cause, the Company shall promptly appoint a
successor Trustee of such Trust. If, within one year after such resignation,
removal or incapability, or other occurrence of such vacancy, a successor
Trustee of such Trust shall be appointed by Act of the Certificateholders of the
related series holding Certificates of such series evidencing Fractional
Undivided Interests aggregating not less than a majority in interest in such
Trust delivered to the Company, the related Owner Trustees, the related Loan
Trustee and the retiring Trustee, the successor Trustees so appointed shall,
with the approval of the Company, which approval shall not be unreasonably
withheld, forthwith upon its acceptance of such appointment, become the
successor Trustee of such Trust and supersede the successor Trustee of such
Trust appointed as provided above. If no successor Trustee shall have been so
appointed as provided above and accepted appointment in the manner hereinafter
provided, the resigning Trustee or any Certificateholder who has been a bona
fide Certificateholder of the related series for at least six months may, on
behalf of himself and all others similarly situated, petition any court of
competent jurisdiction for the appointment of a successor Trustee of such Trust.

      (g) The successor Trustee of a Trust shall give notice of the resignation
and removal of the Trustee and appointment of the successor Trustee by mailing
written notice of such event by first-class mail, postage prepaid, to the
Certificateholders of the related series as their names and addresses appear in
the Register. Each notice shall include the name of such successor Trustee and
the address of its Corporate Trust Office.

      Section 7.09. Acceptance of Appointment by Successor. Every successor
Trustee appointed hereunder shall execute, acknowledge and deliver to the
Company and to the retiring Trustee with respect to any or all Trusts an
instrument accepting such appointment, and thereupon the resignation or removal
of the retiring Trustee with respect to such Trusts shall become effective and
such successor

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                                                                              32


Trustee, without any further act, deed or conveyance, shall become vested with
all the rights, powers, trusts and duties of the retiring Trustee; but, on
request of the Company or the successor Trustee, such retiring Trustee shall
execute and deliver an instrument transferring to such successor Trustee all
such rights, powers and trusts of the retiring Trustee and shall duly assign,
transfer and deliver to such successor Trustee all property and money held by
such retiring Trustee in respect of such Trusts hereunder, subject nevertheless
to its lien, if any, provided for in Section 7.06. Upon request of any such
successor Trustee, the Company, the retiring Trustee and such successor Trustee
shall execute and deliver any and all instruments containing such provisions as
shall be necessary or desirable to transfer and confirm to, and for more fully
and certainly vesting in, such successor Trustee all such rights, powers and
trusts.

      If a successor Trustee is appointed with respect to one or more (but not
all) Trusts, the Company, the predecessor Trustee and each successor Trustee
with respect to any Trust shall execute and deliver a supplemental agreement
hereto which shall contain such provisions as shall be deemed necessary or
desirable to confirm that all the rights, powers, trusts and duties of the
predecessor Trustee with respect to the Trusts as to which the predecessor
Trustee is not retiring shall continue to be vested in the predecessor Trustee,
and shall add to or change any of the provisions of this Basic Agreement and the
applicable Trust Supplements as shall be necessary to provide for or facilitate
the administration of the Trusts hereunder by more than one Trustee, it being
understood that nothing herein or in such supplemental agreement shall
constitute such Trustees co-Trustees of the same Trust and that each such
Trustee shall be Trustee of separate Trusts.

      No successor Trustee shall accept its appointment unless at the time of
such acceptance such successor Trustee shall be qualified and eligible under
this Article.

      Section 7.10. Merger, Conversion, Consolidation or Succession to Business.
Any corporation into which the Trustee may be merged or converted or with which
it may be consolidated, or any corporation resulting from any merger, conversion
or consolidation to which the Trustee shall be a party, or any corporation
succeeding to all or substantially all of the corporate trust business of the
Trustee, shall be the successor of the Trustee hereunder, provided such
corporation shall be otherwise qualified and eligible under this Article,
without the execution or filing of any paper or any further act on the part of
any of the parties hereto. In case any Certificates shall have been executed or
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such execution or authentication and deliver the Certificates so executed or
authenticated with the same effect as if such successor Trustee had itself
executed or authenticated such Certificates.

      Section 7.11. Maintenance of Agencies.

      (a) With respect to each series of Certificates, there shall at all times
be maintained in the Borough of Manhattan, The City of New York, an office or
agency where Certificates of such series may be presented or surrendered for
registration of transfer or for exchange, and for payment thereof and where
notices and demands to or upon the Trustee in respect of such Certificates or of
the related Trust Supplement may be served. Such office or agency shall be
initially at 61 Broadway, New York, New York 10006. Written notice of the
location of each such other office or agency and of any change of location
thereof shall be given by the Trustee to the Company, the Guarantor, any Owner
Trustees, the Loan Trustees and the Certificateholders of such series. In the
event that no such office or agency shall be maintained or no such notice of
location or of change of location shall be given,
<PAGE>
                                                                              33


presentations and demands may be made and notices may be served at the Corporate
Trust Office of the Trustee.

      (b) There shall at all times be a Registrar and a Paying Agent hereunder
with respect to the Certificates of each series. Each such Authorized Agent
shall be a bank or trust company, shall be a corporation organized and doing
business under the laws of the United States or any state, with a combined
capital and surplus of at least $75,000,000, or a corporation having a combined
capital and surplus in excess of $5,000,000 the obligations of which are
guaranteed by a corporation organized and doing business under the laws of the
United States or any state, with a combined capital and surplus of at least
$75,000,000, and shall be authorized under such laws to exercise corporate trust
powers, subject to supervision by Federal or state authorities. The Trustee
shall initially be the Paying Agent and, as provided in Section 3.04, Registrar
hereunder with respect to the Certificates of each series. Each Registrar shall
furnish to the Trustee, at stated intervals of not more than six months, and at
such other times as the Trustee may request in writing, a copy of the Register
maintained by such Registrar.

      (c) Any corporation into which any Authorized Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, consolidation or conversion to which any Authorized Agent shall
be a party, or any corporation succeeding to the corporate trust business of any
Authorized Agent, shall be the successor of such Authorized Agent hereunder, if
such successor corporation is otherwise eligible under this Section, without the
execution or filing of any paper or any further act on the part of the parties
hereto or such Authorized Agent or such successor corporation.

      (d) Any Authorized Agent may at any time resign by giving written notice
of resignation to the Trustee, the Company, any related Owner Trustees and the
related Loan Trustees. The Company may, and at the request of the Trustee shall,
at any time terminate the agency of any Authorized Agent by giving written
notice of termination to such Authorized Agent and to the Trustee. Upon the
resignation or termination of an Authorized Agent or in case at any time any
such Authorized Agent shall cease to be eligible under this Section (when in
either case, no other Authorized Agent performing the functions of such
Authorized Agent shall have been appointed), the Company shall promptly appoint
one or more qualified successor Authorized Agents, reasonably satisfactory to
the Trustee, to perform the functions of the Authorized Agent which has resigned
or whose agency has been terminated or who shall have ceased to be eligible
under this Section. The Company shall give written notice of any such
appointment made by it to the Trustee, any related Owner Trustees and the
related Loan Trustees; and in each case the Trustee shall mail notice of such
appointment to all Certificateholders of the related series as their names and
addresses appear on the Register for such series.

      (e) The Company agrees to pay, or cause to be paid, from time to time to
each Authorized Agent reasonable compensation for its services and to reimburse
it for its reasonable expenses.

      Section 7.12. Money for Certificate Payments to Be Held in Trust. All
moneys deposited with any Paying Agent for the purpose of any payment on
Certificates shall be deposited and held in trust for the benefit of the
Certificateholders entitled to such payment, subject to the provisions of this
Section. Moneys so deposited and held in trust shall constitute a separate trust
fund for the benefit of the Certificateholders with respect to which such money
was deposited.

      The Trustee may at any time, for the purpose of obtaining the satisfaction
and discharge of this Agreement or for any other purpose, direct any Paying
Agent to pay to the Trustee all sums held in

<PAGE>
                                                                              34


trust by such Paying Agent, such sums to be held by the Trustee upon the same
trusts as those upon which such sums were held by such Paying Agent; and, upon
such payment by any Paying Agent to the Trustee, such Paying Agent shall be
released from all further liability with respect to such money.

      Section 7.13. Registration of Equipment Notes in Trustee's Name. Subject
to the provisions of any Intercreditor Agreement, the Trustee agrees that all
Equipment Notes, and Permitted Investments, if any, shall be issued in the name
of the Trustee as trustee for the applicable Trust or its nominee and held by
the Trustee, or, if not so held, the Trustee or its nominee shall be reflected
as the owner of such Equipment Notes or Permitted Investments as the case may
be, in the register of the issuer of such Equipment Notes or Permitted
Investments.

      Section 7.14. Representations and Warranties of Trustee. The Trustee
hereby represents and warrants that:

            (a) the Trustee is a national banking association organized and
      validly existing, and in good standing under the laws of the United
      States;

            (b) the Trustee has full power, authority and legal right to
      execute, deliver, and perform this Agreement, any Intercreditor Agreement
      and the Note Purchase Agreements and has taken all necessary action to
      authorize the execution, delivery, and performance by it of this
      Agreement, any Intercreditor Agreement and the Note Purchase Agreements;

            (c) the execution, delivery and performance by the Trustee of this
      Agreement, any Intercreditor Agreement and the Note Purchase Agreements
      (i) will not violate any provision of any United States federal law or the
      law of the State of Connecticut governing the banking and trust powers of
      the Trustee or any order, writ, judgment, or decree of any court,
      arbitrator, or governmental authority applicable to the Trustee or any of
      its assets, (ii) will not violate any provision of the articles of
      association or by-laws of the Trustee, and (iii) will not violate any
      provision of, or constitute, with or without notice or lapse of time, a
      default under, or result in the creation or imposition of any lien on any
      properties included in the Trust Property pursuant to the provisions of,
      any mortgage, indenture, contract, agreement or other undertaking to which
      it is a party, which violation, default or lien could reasonably be
      expected to have an adverse effect on the Trustee's performance or ability
      to perform its duties hereunder or thereunder or on the transactions
      contemplated herein or therein;

            (d) the execution, delivery and performance by the Trustee of this
      Agreement any Intercreditor Agreement and the Note Purchase Agreements
      will not require the authorization, consent, or approval of, the giving of
      notice to, the filing or registration with, or the taking of any other
      action in respect of, any governmental authority or agency of the United
      States or the State of Connecticut regulating the banking and corporate
      trust activities of the Trustee; and

            (e) this Agreement, any Intercreditor Agreement and the Note
      Purchase Agreements have been duly executed and delivered by the Trustee
      and constitute the legal, valid, and binding agreements of the Trustee,
      enforceable against it in accordance with their respective terms, provided
      that enforceability may be limited by (i) applicable bankruptcy,
      insolvency, reorganization, moratorium or similar laws affecting the
      rights of creditors generally and (ii) general principles of equity.

<PAGE>
                                                                              35


      Section 7.15. Withholding Taxes; Information Reporting. As to the
Certificates of any series, the Trustee, as trustee of the related grantor trust
created by this Agreement, shall exclude and withhold from each distribution of
principal, premium, if any, and interest and other amounts due under this
Agreement or under the Certificates of such series any and all withholding taxes
applicable thereto as required by law. The Trustee agrees to act as such
withholding agent and, in connection therewith, whenever any taxes or similar
charges are required to be withheld with respect to any amounts paid by or on
behalf of the Trustee in respect of the Certificates of such series, to withhold
such amounts and timely pay the same to the authority in the name of and on
behalf of the Certificateholders of such series, that it will file any necessary
withholding tax returns or statements when due, and that, as promptly as
possible after the payment thereof, it will deliver to each such
Certificateholder necessary documentation showing the payment thereof, together
with such additional documentary evidence as such Certificateholders of such
series may reasonably request from time to time. The Trustee agrees to file any
other information reports as it may be required to file under United States law.

      Section 7.16. Trustee's Liens. The Trustee in its individual capacity
agrees that it will, in respect of each Trust created by this Agreement at its
own cost and expense promptly take any action as may be necessary to duly
discharge and satisfy in full any mortgage, pledge, lien, charge, encumbrance,
security interest or claim ("Trustee's Liens") on or with respect to the Trust
Property of such Trust which is attributable to the Trustee either (i) in its
individual capacity and which is unrelated to the transactions contemplated by
this Agreement, the related Note Purchase Agreements or the related Note
Documents, or (ii) as Trustee hereunder or in its individual capacity and which
arises out of acts or omissions which are not contemplated by this Agreement.

      Section 7.17. Preferential Collection of Claims. The Trustee shall comply
with Section 311(a) of the Trust Indenture Act, excluding any creditor
relationship listed in Section 311(b) of the Trust Indenture Act. If the Trustee
shall resign or be removed as Trustee, it shall be subject to Section 311(a) of
the Trust Indenture Act to the extent provided therein.

                                  ARTICLE VIII

                CERTIFICATEHOLDERS' LISTS AND REPORTS BY TRUSTEE

      Section 8.01. The Company to Furnish Trustee with Names and Addresses of
Certificateholders. The Company will furnish to the Trustee within 15 days after
each Record Date with respect to a Scheduled Payment, and at such other times as
the Trustee may request in writing, within 30 days after receipt by the Company
of any such request, a list, in such form as the Trustee may reasonably require,
of all information in the possession or control of the Company as to the names
and addresses of the Certificateholders of such series, in each case as of a
date not more than 15 days prior to the time such list is furnished; provided,
however, that so long as the Trustee is the sole Registrar for such series, no
such list need be furnished; and provided further, however, that no such list
need be furnished for so long as a copy of the Register is being furnished to
the Trustee pursuant to Section 7.11.

      Section 8.02. Preservation of Information; Communications to
Certificateholders. The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Certificateholders of each
series contained in the most recent list furnished to the Trustee as provided in
Section 7.11 or Section 8.01, as the case may be, and the names and addresses of
Certificateholders of each series received by the Trustee in its capacity as
Registrar, if so acting. The Trustee may destroy

<PAGE>
                                                                              36


any list furnished to it as provided in Section 7.11 or Section 8.01, as the
case may be, upon receipt of a new list so furnished.

      Section 8.03. Reports by Trustee. Within 60 days after May 15 of each year
commencing with the first full year following the issuance of any series of
Certificates, the Trustee shall transmit to the Certificateholders of each
series, as provided in Section 313(c) of the Trust Indenture Act, a brief report
dated as of such May 15, if required by Section 313(a) of the Trust Indenture
Act.

      Section 8.04. Reports by the Guarantor and Company. The Guarantor and the
Company each shall:

      (a) file with the Trustee, within 30 days after the Guarantor or the
Company is required to file the same with the SEC, copies of the annual reports
and of the information, documents and other reports (or copies of such portions
of any of the foregoing as the SEC may from time to time by rules and
regulations prescribe) which the Guarantor or the Company is required to file
with the SEC pursuant to section 13 or section 15(d) of the Securities Exchange
Act of 1934, as amended; or, if the Guarantor or the Company is not required to
file information, documents or reports pursuant to either of such sections, then
to file with the Trustee and the SEC, in accordance with rules and regulations
prescribed by the SEC, such of the supplementary and periodic information,
documents and reports which may be required pursuant to section 13 of the
Securities Exchange Act of 1934, as amended, in respect of a security listed and
registered on a national securities exchange as may be prescribed in such rules
and regulations;

      (b) file with the Trustee and the SEC, in accordance with the rules and
regulations prescribed by the SEC, such additional information, documents and
reports with respect to compliance by the Guarantor and the Company with the
conditions and covenants of the Guarantor and the Company provided for in this
Agreement, as may be required by such rules and regulations, including, in the
case of annual reports, if required by such rules and regulations, certificates
or opinions of independent public accountants, conforming to the requirements of
Section 1.02;

      (c) transmit to all Certificateholders, in the manner and to the extent
provided in Section 313(c) of the Trust Indenture Act such summaries of any
information, documents and reports required to be filed by the Guarantor and the
Company pursuant to subsections (a) and (b) of this Section 8.04 as may be
required by rules and regulations prescribed by the SEC;

      (d) furnish to the Trustee, not less often than annually, a brief
certificate from the principal executive officer, principal financial officer or
principal accounting officer as to his or her knowledge of the Guarantor's and
the Company's compliance with all conditions and covenants under this Agreement
(it being understood that for purposes of this paragraph (d), such compliance
shall be determined without regard to any period of grace or requirement of
notice provided under this Agreement); and

      (e) make available to any Certificateholder upon request, the annual
audited and quarterly unaudited financial statements of the Guarantor which are
provided to the Trustee.

<PAGE>
                                                                              37


                                   ARTICLE IX

                             SUPPLEMENTAL AGREEMENTS

      Section 9.01. Supplemental Agreements Without Consent of
Certificateholders. Without the consent of the Certificateholders, the Guarantor
and the Company may, and the Trustee (subject to Section 9.03) shall, at any
time and from time to time, enter into one or more agreements supplemental
hereto or, if applicable, to the Intercreditor Agreement or a Note Purchase
Agreement in form satisfactory to the Trustee, for any of the following
purposes:

            (1) to provide for the formation of a Trust, the issuance of a
series of certificates and the other matters contemplated by Section 2.01(b); or

            (2) to evidence the succession of another corporation to the Company
or the Guarantor and the assumption by any such successor of the covenants of
the Company or the Guarantor herein contained; or

            (3) to add to the covenants of the Guarantor or the Company for the
benefit of the Certificateholders of any series, or to surrender any right or
power in this Agreement conferred upon the Guarantor or the Company; or

            (4) to correct or supplement any provision in this Agreement which
may be defective or inconsistent with any other provision herein or in any Trust
Supplement or to make any other provisions with respect to matters or questions
arising under this Agreement, provided that any such action shall not adversely
affect the interests of the Certificateholders of any series; or to cure any
ambiguity or correct any mistake; or

            (5) to modify, eliminate or add to the provisions of this Agreement
to such extent as shall be necessary to continue the qualification of this
Agreement (including any supplemental agreement) under the Trust Indenture Act,
or under any similar Federal statute hereafter enacted, and to add to this
Agreement such other provisions as may be expressly permitted by the Trust
Indenture Act, excluding, however, the provisions referred to in Section
316(a)(2) of the Trust Indenture Act as in effect at the date as of which this
instrument was executed or any corresponding provision in any similar Federal
statute hereafter enacted; or

            (6) to evidence and provide for the acceptance of appointment under
this Agreement by a successor Trustee with respect to one or more Trusts and to
add to or change any of the provisions of this Agreement as shall be necessary
to provide for or facilitate the administration of the Trusts hereunder and
thereunder by more than one Trustee, pursuant to the requirements of Section
7.09; or

            (7) to make any other amendments or modifications hereto, provided
such amendments or modifications shall only apply to Certificates of one or more
series to be thereafter issued.

      Section 9.02. Supplemental Agreements with Consent of Certificateholders.
With respect to each separate Trust and the series of Certificates relating
thereto, with the consent of the Certificateholders holding Certificates of any
series evidencing Fractional Undivided Interests aggregating not less than a
majority in interest in such Trust, by Act of said Certificateholders delivered

<PAGE>
                                                                              38


to the Guarantor, the Company and the Trustee, the Guarantor and the Company may
(with the consent of the Owner Trustee, if any, relating to such certificates,
which consent shall not be unreasonably withheld), and the Trustee (subject to
Section 9.03) shall, enter into an agreement or agreements supplemental hereto
for the purpose of adding any provisions to or changing in any manner or
eliminating any of the provisions of this Agreement, any Intercreditor Agreement
or any Note Purchase Agreement to the extent applicable to such
Certificateholders or of modifying in any manner the rights and obligations of
such Certificateholders under this Agreement; provided, however, that no such
supplemental agreement shall, without the consent of the Certificateholder of
each Outstanding Certificate affected thereby:

            (1) reduce in any manner the amount of, or delay the timing of, any
receipt by the Trustee of payments on the Equipment Notes held in such Trust or
distributions that are required to be made herein on any Certificate of such
series, or change any date of payment of any Certificate of such series, or
change the place of payment where, or the coin or currency in which, any
Certificate of such series is payable, or impair the right to institute suit for
the enforcement of any such payment or distribution on or after the Regular
Distribution Date or Special Distribution Date applicable thereto; or

            (2) permit the disposition of any Equipment Note in the Trust
Property of such Trust except as permitted by this Agreement, or otherwise
deprive such Certificateholder of the benefit of the ownership of the Equipment
Notes in such Trust; or

            (3) alter the priority of distributions specified in the
Intercreditor Agreement; or

            (4) reduce the percentage of the aggregate Fractional Undivided
Interests of such Trust which is required for any such supplemental agreement,
or reduce such percentage required for any waiver (of compliance with certain
provisions of this Agreement or certain defaults hereunder and their
consequences) provided for in this Agreement; or

            (5) modify any of the provisions of this Section or Section 6.05,
except to increase any such percentage or to provide that certain other
provisions of this Agreement cannot be modified or waived without the consent of
the Certificateholder of each Certificate or such series affected thereby.

      It shall not be necessary for any Act of such Certificateholders under
this Section to approve the particular form of any proposed supplemental
agreement, but it shall be sufficient if such Act shall approve the substance
thereof.

      Section 9.03. Documents Affecting Immunity or Indemnity. If in the opinion
of the Trustee any document required to be executed by it pursuant to the terms
of Section 9.01 or 9.02 affects any interest, right, duty, immunity or indemnity
in favor of the Trustee under this Basic Agreement or any Trust Supplement, the
Trustee may in its discretion decline to execute such document.

      Section 9.04. Execution of Supplemental Agreements. In executing, or
accepting the additional trusts created by, any supplemental agreement permitted
by this Article or the modifications thereby of the trusts created by this
Agreement, the Trustee shall be entitled to receive, and shall be fully
protected in relying upon, an Opinion of Counsel stating that the execution of
such supplemental agreement is authorized or permitted by this Agreement.

      Section 9.05. Effect of Supplemental Agreements. Upon the execution of any
supplemental agreement under this Article, this Basic Agreement shall be
modified in accordance therewith, and such

<PAGE>
                                                                              39


supplemental agreement shall form a part of this Basic Agreement for all
purposes; and every Certificateholder of each series theretofore or thereafter
authenticated and delivered hereunder shall be bound thereby to the extent
applicable to such series.

      Section 9.06. Conformity with Trust Indenture Act. Every supplemental
agreement executed pursuant to this Article shall conform to the requirements of
the Trust Indenture Act as then in effect.

      Section 9.07. Reference in Certificates to Supplemental Agreements.
Certificates of each series authenticated and delivered after the execution of
any supplemental agreement applicable to such series pursuant to this Article
may bear a notation in form approved by the Trustee as to any matter provided
for in such supplemental agreement; and, in such case, suitable notation may be
made upon Outstanding Certificates of such series after proper presentation and
demand.

                                    ARTICLE X

                   AMENDMENTS TO INDENTURE AND NOTE DOCUMENTS

      Section 10.01. Amendments and Supplements to Indenture and Other Note
Documents. In the event that the Trustee, as holder of any Equipment Notes in
trust for the benefit of the Certificateholders of any series or as Controlling
Party, receives a request for a consent to any amendment, modification, waiver
or supplement under any Indenture or other Note Document the Trustee shall
forthwith send a notice of such proposed amendment, modification, waiver or
supplement to each Certificateholder of such series registered on the Register
as of the date of such notice. The Trustee shall request from Certificateholders
of such series a Direction as to (a) whether or not to take or refrain from
taking any action which a holder of such Equipment Note has the option to
direct, (b) whether or not to give or execute any waivers, consents, amendments,
modifications or supplements as a holder of such Equipment Note and (c) how to
vote any Equipment Note if a vote has been called for with respect thereto.
Provided such a request for Certificateholder Direction shall have been made, in
directing any action or casting any vote or giving any consent as the holder of
any Equipment Note, the Trustee shall vote for or give consent to any such
action with respect to such Equipment Note in the same proportion as that of (i)
the aggregate face amounts of all Certificates of such series actually voted in
favor of or for giving consent to such action by Acts of Certificateholders to
(ii) the aggregate face amount of all Outstanding Certificates. For purposes of
the immediately preceding sentence, a Certificate shall have been "actually
voted" if the Holder of such Certificate has delivered to the Trustee an
instrument evidencing such Holder's consent to such Direction on or prior to the
Business Day before the Trustee directs such action or casts such vote or gives
such consent. Notwithstanding the foregoing, but subject to Section 6.04 and any
Intercreditor Agreement, the Trustee may, in its own discretion and at its own
direction consent and notify the relevant Loan Trustee of such consent to any
amendment, modification, waiver or supplement under the relevant Indenture,
Liquidity Facility, or any Note Document, if an Event of Default hereunder shall
have occurred and be continuing, or if such amendment, modification or waiver
will not adversely affect the interests of the Certificateholders.

                                   ARTICLE XI

                              TERMINATION OF TRUSTS

      Section 11.01. Termination of the Trusts. In respect of each Trust created
by the Basic Agreement as supplemented by a related Trust Supplement, the
respective obligations and responsibilities of the Company, the Guarantor and
the Trustee created under this Agreement and the

<PAGE>
                                                                              40


Trust created hereby and such Trust shall terminate upon the distribution to all
Holders of the Certificates of the series of such Trust and the Trustee of all
amounts required to be distributed to them pursuant to this Agreement and the
disposition of all property held as part of the Trust Property of the related
series of such Trust; provided, however, that in no event shall such Trust
continue beyond the final expiration date determined as provided in this
Agreement.

      Notice of any termination of a Trust, specifying the applicable Regular
Distribution Date (or applicable Special Distribution Date, as the case may be)
upon which the Certificateholders of any series may surrender their Certificates
to the Trustee for payment of the final distribution and cancellation, shall be
mailed promptly by the Trustee to Certificateholders of such series not earlier
than the minimum number of days and not more than the maximum number of days
specified therefor in the related Trust Supplement preceding such final
distribution specifying (A) the Regular Distribution Date (or Special
Distribution Date, as the case may be) upon which the proposed final payment of
the Certificates of such series will be made upon presentation and surrender of
Certificates of such series at the office or agency of the Trustee therein
specified, (B) the amount of any such proposed final payment, and (C) that the
Record Date otherwise applicable to such Regular Distribution Date (or Special
Distribution Date, as the case may be) is not applicable, payments being made
only upon presentation and surrender of the Certificates of such series at the
office or agency of the Trustee therein specified. The Trustee shall give such
notice to the Registrar at the time such notice is given to Certificateholders
of such series. Upon presentation and surrender of the Certificates of such
series, the Trustee shall cause to be distributed to Certificateholders of such
series amounts distributable on such Regular Distribution Date (or Special
Distribution Date, as the case may be) pursuant to Section 4.02.

      In the event that all of the Certificateholders of such series shall not
surrender their Certificates for cancellation within six months after the date
specified in the above-mentioned written notice, the Trustee shall give a second
written notice to the remaining Certificateholders of such series to surrender
their Certificates for cancellation and receive the final distribution with
respect thereto. In the event that any money held by the Trustee for the payment
of distributions on the Certificates of such series shall remain unclaimed for
two years (or such lesser time as the Trustee shall be satisfied, after sixty
days' notice from the Company, is one month prior to the escheat period provided
under applicable law) after the final distribution date with respect thereto,
the Trustee shall pay to each Loan Trustee the appropriate amount of money
relating to such Loan Trustee and shall give written notice thereof to the
related Owner Trustees and the Company.

                                   ARTICLE XII

                            MISCELLANEOUS PROVISIONS

      Section 12.01. Limitation on Rights of Certificateholders. The death or
incapacity of any Certificateholder of any series shall not operate to terminate
this Agreement, or the related Trust, nor entitle such Certificateholder's legal
representatives or heirs to claim an accounting or to take any action or
commence any proceeding in any court for a partition or winding up of the Trust,
nor otherwise affect the rights, obligations, and liabilities of the parties
hereto or any of them.

      Section 12.02. Liabilities of Certificateholders. Neither the existence of
the Trust nor any provision in this Agreement is intended to or shall limit the
liability the Certificateholders would otherwise incur if the Certificateholders
owned Trust Property as co-owners, or incurred any obligations of the Trust,
directly rather than through the Trust.

<PAGE>
                                                                              41


      Section 12.03. Certificates Nonassessable and Fully Paid.
Certificateholders of each series shall not be personally liable for obligations
of the related Trust, the Fractional Undivided Interests represented by the
Certificates of such series shall be nonassessable for any losses or expenses of
such Trust or for any reason whatsoever, and Certificates of such series upon
authentication thereof by the Trustee pursuant to Section 3.02 are and shall be
deemed fully paid. No Certificateholder of such series shall have any right
(except as expressly provided herein) to vote or in any manner otherwise control
the operation and management of the related Trust Property, the related Trust,
or the obligations of the parties hereto, nor shall anything set forth herein,
or contained in the terms of the Certificates of such series, be construed so as
to constitute the Certificateholders of such series from time to time as
partners or members of an association.

      Section 12.04. Registration of Equipment Notes in Name of Subordination
Agent. If a Trust is party to an Intercreditor Agreement, the Trustee agrees
that all Equipment Notes to be purchased by such Trust shall be issued in the
name of the Subordination Agent under such Intercreditor Agreement or its
nominee and held by such Subordination Agent in trust for the benefit of the
Certificateholders, or, if not so held, such Subordination Agent or its nominee
shall be reflected as the owner of such Equipment Notes in the register of the
issuer of such Equipment Notes.

      Section 12.05. Notices.

      (a) Unless otherwise specifically provided herein or in the applicable
Trust Supplement with respect to any Trust, all notices required under the terms
and provisions of this Basic Agreement or such Trust Supplement with respect to
such Trust shall be in English and in writing, and any such notice may be given
by United States mail, courier service, telegram, telex, telemessage, telecopy,
telefax, cable or facsimile (confirmed by telephone or in writing in the case of
notice by telegram, telex, telemessage, telecopy, telefax, cable or facsimile)
or any other customary means of communication, and any such notice shall be
effective when delivered, or if mailed, three days after deposit in the United
States mail with proper postage for ordinary mail prepaid,

      if to the Company or the Guarantor, to:

            Mail:       Northwest Airlines, Inc.
                        5101 Northwest Drive
                        St. Paul, Minnesota  55111-3034

            Courier:    2700 Lone Oak Parkway
                        Eagan, Minnesota  55121

            Attention:  Senior Vice President-Finance and Treasurer

            Facsimile:  (612) 726-0665

<PAGE>
                                                                              42


if to the Trustee, to:

      State Street Bank and Trust Company of Connecticut, National Association
      225 Asylum Street, Goodwin Square
      Hartford, Connecticut 06103

      Attention:  Corporate/Muni Department

      Facsimile:  (860) 244-1889
      Telephone:  (860) 244-1822

      (b) The Company, the Guarantor or the Trustee, by notice to the other, may
designate additional or different addresses for subsequent notices or
communications.

      (c) Any notice or communication to Certificateholders of any series shall
be mailed by first-class mail to the addresses for Certificateholders of such
series shown on the Register kept by the Registrar and to addresses filed with
the Trustee for Certificate Owners of such series. Failure so to mail a notice
or communication or any defect in such notice or communication shall not affect
its sufficiency with respect to other Certificateholders or Certificate Owners
of such series.

      (d) If a notice or communication is mailed in the manner provided above
within the time prescribed, it is conclusively presumed to have been duly given,
whether or not the addressee receives it.

      (e) If the Company mails a notice or communication to the
Certificateholders of such series, it shall mail a copy to the Trustee and to
each Paying Agent for such series at the same time.

      (f) Notwithstanding the foregoing, all communications or notices to the
Trustee shall be deemed to be given only when received by a Responsible Officer
of the Trustee.

      (g) The Trustee shall promptly furnish the Company with a copy of any
demand, notice or written communication received by the Trustee hereunder from
any Certificateholder, Owner Trustee or Loan Trustee.

      Section 12.06. Governing Law. THIS BASIC AGREEMENT HAS BEEN DELIVERED IN
THE STATE OF NEW YORK AND, TOGETHER WITH ALL TRUST SUPPLEMENTS AND CERTIFICATES,
SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK AND THE
OBLIGATIONS, RIGHTS, AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED
IN ACCORDANCE WITH SUCH LAWS.

      Section 12.07. Severability of Provisions. If any one or more of the
covenants, agreements, provisions, or terms of this Agreement shall be for any
reason whatsoever held invalid, then such covenants, agreements, provisions, or
terms shall be deemed severable from the remaining covenants, agreements,
provisions, or terms of this Agreement and shall in no way affect the validity
or enforceability of the other provisions of this Agreement or any Trust, or of
the Certificates of any series or the rights of the Certificateholders thereof.

      Section 12.08. Trust Indenture Act Controls. This Agreement is subject to
the provisions of the Trust Indenture Act and shall, to the extent applicable,
be governed by such provisions.

<PAGE>
                                                                              43


      Section 12.09. Effect of Headings and Table of Contents. The Article and
Section headings herein and the Table of Contents are for convenience only and
shall not affect the construction hereof.

      Section 12.10. Successors and Assigns. All covenants, agreements,
representations and warranties in this Agreement by the Trustee, the Guarantor
and the Company shall bind and, to the extent permitted hereby, shall inure to
the benefit of and be enforceable by their respective successors and assigns,
whether so expressed or not.

      Section 12.11. Benefits of Agreement. Nothing in this Agreement or in the
Certificates of any series, express or implied, shall give to any Person, other
than the parties hereto and their successors hereunder, and the
Certificateholders of each series, any benefit or any legal or equitable right,
remedy or claim under this Agreement.

      Section 12.12. Legal Holidays. In any case where any Regular Distribution
Date or Special Distribution Date relating to any Certificate of any series
shall not be a Business Day with respect to such series, then (notwithstanding
any other provision of this Agreement) payment need not be made on such date,
but may be made on the next succeeding Business Day with the same force and
effect as if made on such Regular Distribution Date or Special Distribution
Date, and no interest shall accrue during the intervening period.

      Section 12.13. Counterparts. For the purpose of facilitating the execution
of this Agreement and for other purposes, this Agreement may be executed
simultaneously in any number of counterparts, each of which counterparts shall
be deemed to be an original, and all of which counterparts shall constitute but
one and the same instrument.

      Section 12.14. Communication by Certificateholders with Other
Certificateholders. Certificateholders of any series may communicate with other
Certificateholders of such series with respect to their rights under this Basic
Agreement, the related Trust Supplement or the Certificates of such series
pursuant to Section 3.12(b) of the Trust Indenture Act. The Company, the
Guarantor, the Trustee and any and all other persons benefitted by this
Agreement shall have the protection afforded by Section 312(c) of the Trust
Indenture Act.

<PAGE>
                                                                              44


      IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have caused
this Basic Agreement to be duly executed by their respective officers, all as of
the day and year first above written.


                                     NORTHWEST AIRLINES CORPORATION

                                     By /s/ Daniel B. Matthews
                                        ----------------------------------------
                                     Title: Vice President & Assistant Treasurer
                                            ------------------------------------


                                     NORTHWEST AIRLINES, INC.

                                     By /s/ Daniel B. Matthews
                                        ----------------------------------------
                                     Title: Vice President & Assistant Treasurer
                                            ------------------------------------


                                     STATE STREET BANK AND TRUST
                                     COMPANY OF CONNECTICUT, NATIONAL
                                     ASSOCIATION,
                                     as Trustee

                                     By
                                        ----------------------------------------
                                     Title:
                                            ------------------------------------

<PAGE>
                                                                              44


      IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have caused
this Basic Agreement to be duly executed by their respective officers, all as of
the day and year first above written.


                                     NORTHWEST AIRLINES CORPORATION

                                     By
                                        ----------------------------------------
                                     Title:
                                            ------------------------------------


                                     NORTHWEST AIRLINES, INC.

                                     By
                                        ----------------------------------------
                                     Title:
                                            ------------------------------------


                                     STATE STREET BANK AND TRUST
                                     COMPANY OF CONNECTICUT, NATIONAL
                                     ASSOCIATION,
                                     as Trustee

                                     By /s/ Donald E. Smith
                                        ----------------------------------------
                                     Title: VICE PRESIDENT
                                            ------------------------------------

<PAGE>

                                                                       EXHIBIT A

                               FORM OF CERTIFICATE

      1/[Unless this certificate is presented by an authorized representative of
The Depository Trust Company, a New York corporation ("DTC"), to Issuer or its
agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co. or in such other name as is
requested by an authorized representative of DTC (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the registered owner
hereof, Cede & Co., has an interest herein.]

                NORTHWEST AIRLINES __________ PASS THROUGH TRUST

                                  Pass Through
                         Certificate, Series __________

                   Final Distribution Date: __________, _____

                  evidencing a fractional undivided interest in a trust, the
                  property of which includes certain equipment notes each
                  secured by Aircraft owned by or leased to Northwest Airlines,
                  Inc.

Certificate
No. __________    $__________ Fractional Undivided Interest representing ._____%
                  of the Trust per $1,000 face amount

      THIS CERTIFIES THAT __________________________, for value received, is the
registered owner of a $_____________________ (______________ dollars) Fractional
Undivided Interest in the Northwest Airlines Pass Through Trust (the "Trust")
created by State Street Bank and Trust Company of Connecticut, National
Association, as trustee (the "Trustee"), pursuant to a Pass Through Trust
Agreement dated as of June 3, 1999 (the "Basic Agreement"), as supplemented by
Trust Supplement No. ___________ thereto dated __________, _____ (collectively,
the "Agreement"), among the Trustee, Northwest Airlines Corporation, a
corporation incorporated under Delaware law (the "Guarantor"), and Northwest
Airlines, Inc., a corporation incorporated under Minnesota law (the "Company"),
a summary of certain of the pertinent provisions of which is set forth below. To
the extent not otherwise defined herein, the capitalized terms used herein have
the meanings assigned to them in the Agreement. This Certificate is one of the
duly authorized Certificates designated as "Pass Through Certificates, Series
_____________" (herein called the "Certificates"). This Certificate is issued
under and is subject to the terms, provisions, and conditions of the Agreement,
to which Agreement the Certificateholder of this Certificate by virtue of the
acceptance hereof assents and by which such Certificateholder is bound. The
property of the Trust includes certain

- --------
1/This legend to appear on Book-Entry Certificates to be deposited with the
Depository Trust Company. One Certificate may be issued in a denomination of
less than $1,000 which shall not have this legend.

<PAGE>
                                       2


Equipment Notes and all rights of the Trust to receive any payments under any
Intercreditor Agreement or Liquidity Facility (the "Trust Property"). Each issue
of the Equipment Notes is secured by a security interest in aircraft leased to
or owned by the Company.

      The Certificates represent fractional undivided interests in the Trust and
the Trust Property, and have no rights, benefits or interest in respect of any
other separate trust established pursuant to the terms of the Basic Agreement
for any other series of certificates issued pursuant thereto. [The undivided
percentage interest in the Trust represented by each of this Certificate (as
specified above) and the other Pass Through Certificates, Series [_______], was
determined on the basis of (x) the aggregate of the Reference Principal Amount
of this Certificate (as specified above) and of the other Pass Through
Certificates, Series [________] and (y) the aggregate original principal amounts
of the Equipment Notes constituting the Trust Property.]

      Subject to and in accordance with the terms of the Agreement and any
Intercreditor Agreement, from funds then available to the Trustee, there will be
distributed on each ____________ and ________________ (a "Regular Distribution
Date"), commencing on _______________, _____, to the Person in whose name this
Certificate is registered at the close of business on the 15th day preceding the
Regular Distribution Date, an amount in respect of the Scheduled Payments on the
Equipment Notes due on such Regular Distribution Date, the receipt of which has
been confirmed by the Trustee, equal to the product of the percentage interest
in the Trust evidenced by this Certificate and an amount equal to the sum of
such Scheduled Payments. Subject to and in accordance with the terms of the
Agreement, in the event that Special Payments on the Equipment Notes are
received by the Trustee, from funds then available to the Trustee, there shall
be distributed on the applicable Special Distribution Date, to the Person in
whose name this Certificate is registered at the close of business on the 15th
day preceding the Special Distribution Date, an amount in respect of such
Special Payments on the Equipment Notes, the receipt of which has been confirmed
by the Trustee, equal to the product of the percentage interest in the Trust
evidenced by this Certificate and an amount equal to the sum of such Special
Payments so received. If a Regular Distribution Date or Special Distribution
Date is not a Business Day, distribution shall be made on the immediately
following Business Day with the same force and effect as if made on such Regular
Distribution Date or Special Distribution Date and no interest shall accrue
during the intervening period. The Trustee shall mail notice of each Special
Payment and the Special Distribution Date therefor to the Certificateholder of
this Certificate.

      Distributions on this Certificate will be made by the Trustee by check
mailed to the Person entitled thereto, without the presentation or surrender of
this Certificate or the making of any notation hereon. Except as otherwise
provided in the Agreement and notwithstanding the above, the final distribution
on this Certificate will be made after notice mailed by the Trustee of the
pendency of such distribution and only upon presentation and surrender of this
Certificate at the office or agency of the Trustee specified in such notice.

      The Certificates do not represent a direct obligation of, or an obligation
guaranteed by, or an interest in, the Guarantor, the Company or the Trustee or
any affiliate thereof. The Certificates are limited in right or payment, all as
more specifically set forth on the face hereof and in the Agreement. All
payments or distributions made to Certificateholders under the Agreement shall
be made only from the Trust Property and only to the extent that the Trustee
shall have sufficient income or proceeds from the Trust Property to make such
payments in accordance with the terms of the Agreement. Each Certificateholder
of this Certificate, by its acceptance hereof, agrees that it will look solely
to the income and proceeds from the Trust Property to the extent available for
distribution to such Certificateholder as provided in the Agreement. This
Certificate does not purport to summarize the Agreement and reference

<PAGE>
                                                                               3


is made to the Agreement for information with respect to the interests, rights,
benefits, obligations, proceeds, and duties evidenced hereby. A copy of the
Agreement may be examined during normal business hours at the principal office
of the Trustee, and at such other places, if any, designated by the Trustee, by
any Certificateholder upon request.

      The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Certificateholders under the Agreement at any time
by the Company and the Trustee with the consent of the Certificateholders
holding Certificates evidencing Fractional Undivided Interests aggregating not
less than a majority in interest in the Trust. Any such consent by the
Certificateholder of this Certificate shall be conclusive and binding on such
Certificateholder and upon all future Certificateholders of this Certificate and
of any Certificate issued upon the transfer hereof or in exchange hereof or in
lieu hereof whether or not notation of such consent is made upon this
Certificate. The Agreement also permits the amendment thereof, in certain
limited circumstances, without the consent of the Certificateholders of any of
the Certificates.

      As provided in the Agreement and subject to certain limitations set forth,
the transfer of this Certificate is registrable in the Register upon surrender
of this Certificate for registration of transfer at the offices or agencies
maintained by the Trustee in its capacity as Registrar, or by any successor
Registrar duly endorsed or accompanied by a written instrument of transfer in
form satisfactory to the Trustee and the Registrar, duly executed by the
Certificateholder hereof or such Certificateholder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized denominations
evidencing the same aggregate Fractional Undivided Interest in the Trust will be
issued to the designated transferee or transferees.

      The Certificates are issuable only as registered Certificates without
coupons in minimum denominations of $1,000 Fractional Undivided Interest and
integral multiples thereof except that one Certificate may be in a denomination
of less than $1,000. As provided in the Agreement and subject to certain
limitations therein set forth, the Certificates are exchangeable for new
Certificates of authorized denominations evidencing the same aggregate
Fractional Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.

      No service charge will be made for any such registration of transfer or
exchange, but the Trustee shall require payment of a sum sufficient to cover any
tax or governmental charge payable in connection therewith.

      The Trustee, the Registrar, and any agent of the Trustee or the Registrar
may treat the person in whose name this Certificate is registered as the owner
hereof for all purposes, and neither the Trustee, the Registrar, nor any such
agent shall be affected by any notice to the contrary.

      The obligations and responsibilities created by the Agreement and the
Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to
the Agreement and the disposition of all property held as part of the Trust
Property.

      THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT GIVING EFFECT TO THE
CONFLICT OF LAWS PROVISIONS OF THE STATE OF NEW YORK.

<PAGE>
                                                                               4


      Unless the certificate of authentication hereon has been executed by the
Trustee, by manual signature, this Certificate shall not be entitled to any
benefit under the Agreement or be valid for any purpose.

      IN WITNESS WHEREOF, the Trustee has caused this Certificate to be duly
executed.

                                      NORTHWEST AIRLINES PASS THROUGH TRUST

                                      By: STATE STREET BANK AND TRUST COMPANY
                                          OF CONNECTICUT, NATIONAL ASSOCIATION,
                                          as Trustee


                                            By _________________________________
                                            Title:______________________________


Dated:____________________

<PAGE>

              [FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION]

                    This is one of the Certificates referred
                      to in the within-mentioned Agreement.

                                      STATE STREET BANK AND TRUST COMPANY
                                      OF CONNECTICUT, NATIONAL ASSOCIATION,
                                           as Trustee


                                      By: ________________________________
                                                Authorized Officer



                                                                  EXECUTION COPY

            This Trust Supplement No. 1999-2A, dated as of June 25, 1999 (herein
called the "Trust Supplement"), by and among Northwest Airlines Corporation, a
Delaware corporation (the "Guarantor"), Northwest Airlines, Inc., a Minnesota
corporation (the "Company"), and State Street Bank and Trust Company of
Connecticut, National Association (the "Trustee"), to the Pass Through Trust
Agreement, dated as of June 3, 1999, by and among the Guarantor, the Company and
the Trustee (the "Basic Agreement").

                              W I T N E S S E T H:

            WHEREAS, the Basic Agreement, unlimited as to the aggregate
principal amount of Certificates which may be issued thereunder, has heretofore
been executed and delivered;

            WHEREAS, unless otherwise specified herein, capitalized terms used
herein without definition having the respective meanings specified heretofore in
the Basic Agreement;

            WHEREAS, the Company intends to finance the acquisition of seven new
Airbus A320 aircraft and fourteen new Airbus A319 aircraft either (i) through
separate leveraged lease transactions, in which case the Company will lease such
aircraft (collectively, the "Leased Aircraft") or (ii) through separate secured
loan transactions, in which case the Company will own such aircraft
(collectively, the "Owned Aircraft");

            WHEREAS, in the case of each Owned Aircraft, each Owner Trustee,
acting on behalf of its respective Owner Participant, will issue, on a
non-recourse basis, Equipment Notes, among other things, to finance a portion of
the purchase price of such Leased Aircraft purchased or to be purchased by such
Owner Trustee and leased or to be leased to the Company pursuant to the related
Lease;

            WHEREAS, in the case of an Owned Aircraft, the Company will issue
Equipment Notes to finance a portion of the purchase price of such Owned
Aircraft;

            WHEREAS, pursuant to the terms and conditions of the Basic Agreement
as supplemented by this Trust Supplement (the "Agreement"), the Trustee shall
purchase such Equipment Notes issued by each Owner Trustee or the Company, as
the case may be, having the same interest rate as, and final maturity dates not
later than the final Regular Distribution Date of, the Certificates issued
hereunder and shall hold such Equipment Notes in trust for the benefit of the
Certificateholders;

            WHEREAS, the Trustee hereby declares the creation of this Trust (the
"1999-2A Trust" or the "Applicable Trust") for the benefit of the
Certificateholders, and the initial Certificateholders as the grantors of the
1999-2A Trust, by their respective acceptances of the Certificates, join in the
creation of this 1999-2A Trust with the Trustee;

            WHEREAS, all of the conditions and requirements necessary to make
this Trust Supplement, when duly executed and delivered, a valid, binding and
legal instrument in

<PAGE>
                                                                               2


accordance with its terms and for the purposes herein expressed, have been done,
performed and fulfilled, and the execution and delivery of this Trust Supplement
in the form and with the terms hereof have been in all respects duly authorized;
and

            WHEREAS, this Trust Supplement is subject to the provisions of the
Trust Indenture Act of 1939, as amended, and shall, to the extent applicable, be
governed by such provisions.

            NOW THEREFORE, in consideration of the premises herein, it is agreed
by and among the Guarantor, the Company and the Trustee as follows:

                                    ARTICLE I
                                THE CERTIFICATES

            Section 1.01. The Certificates. There is hereby created a series of
Certificates to be issued under the Agreement to be distinguished and known as
"Pass Through Certificates, Series 1999-2A" (hereinafter defined as the "Series
1999-2A Certificates" or the "Applicable Certificates"). Each Series 1999-2A
Certificate represents a Fractional Undivided Interest in the 1999-2A Trust
created hereby.

            The terms and conditions applicable to the Series 1999-2A
Certificates are as follows:

            (a) The aggregate principal amount of the Series 1999-2A
      Certificates that shall be authenticated under the Agreement (except for
      Series 1999-2A Certificates authenticated and delivered pursuant to
      Sections 3.03, 3.04 and 3.05 of the Basic Agreement) upon their initial
      issuance is $343,254,000.

            (b) The Cut-off Date is the earlier of (i) May 31, 2000 and (ii) the
      day Equipment Notes with respect to all of the Aircraft (as defined below)
      have been acquired by the Applicable Trust.

            (c) The Regular Distribution Dates with respect to any payment of
      Scheduled Payments means each March 1 and September 1, commencing on March
      1, 2000, until payment of all of the Scheduled Payments to be made under
      the Equipment Notes has been made.

            (d) The Special Distribution Dates are as follows: (i) when used
      with respect to the redemption or purchase of any Equipment Notes, the day
      (which shall be a Business Day) on which such redemption or purchase is
      scheduled to occur pursuant to the terms of the applicable Indenture and
      (ii) when used with respect to a Special Payment other than as described
      in clause (i) above, 15 days after the last date on which the Trustee must
      give notice pursuant to Section 4.02(c) of the Basic Agreement (or the
      next Business Day after such 15th day if such date is not a Business Day).

<PAGE>
                                                                               3


            (e) (i) The Series 1999-2A Certificates shall be in the form
      attached hereto as Exhibit A. Each purchaser of Series 1999-2A
      Certificates, by its acceptance of such Certificate or its interest
      therein, will be deemed to represent and warrant to and for the benefit of
      each Owner Participant and the Company that either (x) the assets of an
      employee benefit plan subject to Title I of the Employee Retirement Income
      Security Act of 1974, as amended ("ERISA"), or of a plan subject to
      Section 4975 of the Internal Revenue Code of 1986, as amended (the "Code")
      or of entities which may be deemed to hold such plans, have not been used
      to purchase Series 1999-2A Certificates or (y) one or more prohibited
      transaction statutory or administrative exemptions applies such that the
      use of such plan assets to purchase and hold such Certificate will not
      constitute a non-exempt prohibited transaction under ERISA or Section 4975
      of the Code.

            (ii) The Series 1999-2A Certificates shall be Book-Entry
      Certificates and shall be subject to the conditions set forth in the
      Letter of Representations among the Guarantor, the Company and the
      Clearing Agency (the "Clearing Agency") attached hereto as Exhibit B.

            (f) The Scheduled Payments of principal shall be as set forth in
      Exhibit C hereto.

            (g) The proceeds of the Series 1999-2A Certificates shall be
      deposited in the Deposit Accounts and will be used in accordance with the
      Escrow Agreement and the Deposit Agreement.

            (h) When each Aircraft is delivered, either the Owner Trustee (in
      the case of a Leased Aircraft), acting on behalf of its respective Owner
      Participant, will issue on a non-recourse basis, or the Company (in the
      case of an Owned Aircraft) will issue on a recourse basis, the Equipment
      Notes, the proceeds of which shall be used, among other things, to finance
      a portion of the purchase price to such Owner Trustee or the Company, as
      the case may be, of the following Aircraft:

          Registration Number        Aircraft Type              Engine Type
          -------------------        -------------              -----------

      N364NW ................       Airbus A320-212              CFM56-5A3
      N365NW ................       Airbus A320-212              CFM56-5A3
      N366NW ................       Airbus A320-212              CFM56-5A3
      N367NW ................       Airbus A320-212              CFM56-5A3
      N368NW ................       Airbus A320-212              CFM56-5A3
      N369NW ................       Airbus A320-212              CFM56-5A3
      N370NW ................       Airbus A320-212              CFM56-5A3
      N301NB ................       Airbus A319-113              CFM56-5A4

<PAGE>
                                                                               4


          Registration Number        Aircraft Type              Engine Type
          -------------------        -------------              -----------

      N304NB..................      Airbus A319-113              CFM56-5A4
      N305NB..................      Airbus A319-113              CFM56-5A4
      N306NB..................      Airbus A319-113              CFM56-5A4
      N307NB..................      Airbus A319-113              CFM56-5A4
      N308NB..................      Airbus A319-113              CFM56-5A4
      N309NB..................      Airbus A319-113              CFM56-5A4
      N310NB..................      Airbus A319-113              CFM56-5A4
      N311NB..................      Airbus A319-113              CFM56-5A4
      N312NB..................      Airbus A319-113              CFM56-5A4
      N313NB..................      Airbus A319-113              CFM56-5A4
      N314NB..................      Airbus A319-113              CFM56-5A4

            (i) At the Escrow Agent's request under the Escrow Agreement, the
      Trustee shall affix the corresponding Escrow Receipt to each Series
      1999-2A Certificate. In any event, any transfer or exchange of any Series
      1999-2A Certificate shall also effect a transfer or exchange of the
      related Escrow Receipt. Prior to the Final Withdrawal Date, no transfer or
      exchange of any Series 1999-2A Certificate shall be permitted unless the
      corresponding Escrow Receipt is attached thereto and also is so
      transferred or exchanged. By acceptance of any Series 1999-2A Certificate
      to which an Escrow Receipt is attached, each Certificateholder of such a
      Series 1999-2A Certificate acknowledges and accepts the restrictions on
      transfer of the Escrow Receipt set forth herein and in the Escrow
      Agreement.

            Section 1.02. Intercreditor Agreement. The Series 1999-2A
Certificates are subject to the Intercreditor Agreement, the Deposit Agreement
and the Escrow Agreement.

            Section 1.03. Ranking of Series 1999-2A Certificates. The Series
1999-2A Certificates will be subject to the ranking and priority as set forth in
the Intercreditor Agreement.

            Section 1.04. Liquidity Facility. Payments of interest on the Series
1999-2A Certificates will be supported by a Liquidity Facility to be provided by
the Liquidity Provider for the benefit of the Certificateholders.

            Section 1.05. Ranking of Equipment Notes. The Equipment Notes will
be subject to the ranking and priority as set forth in the related Indenture.

<PAGE>
                                                                               5


            Section 1.06. No Cross-Default or Cross- Collateralization of
Equipment Notes. As set forth in the related Indenture, there will not be any
cross-collateralization provisions or cross-default provisions in respect of the
Equipment Notes.

                                   ARTICLE II
                             PREDELIVERY FUNDING AND
                               STATEMENT OF INTENT

            Section 2.01. Predelivery Funding. On the date hereof, the proceeds
from the issuance of the Applicable Certificates will be deposited in the
Deposit Accounts on behalf of the Escrow Agent. Pursuant to the terms of the
Deposit Agreement and the Note Purchase Agreement, a portion of the proceeds
from the issuance of the Applicable Certificates will be withdrawn from the
Deposit Account on any date on which an Owner Trustee (in the case of a Leased
Aircraft) or the Company (in the case of an Owned Aircraft) issues Equipment
Notes with respect to an Aircraft.

            Section 2.02. Statement of Intent. The parties hereto intend that
the Applicable Trust be classified for U.S. federal income tax purposes as a
grantor trust under Subpart E, Part I of Subchapter J of the Code and not as a
trust or association taxable as a corporation or a partnership. Each of the
parties hereto and each Applicable Certificateholder, or beneficial owner of an
Applicable Certificate, by its acceptance of its Applicable Certificate or a
beneficial interest therein, agrees to treat for all U.S. federal, state and
local income tax purposes (i) the Applicable Trust as a grantor trust and (ii)
Equipment Notes to be issued (or assumed) by an Owner Trust (in the case of a
Leased Aircraft) as indebtedness of such Owner Trust, and Equipment Notes issued
by the Company (in the case of an Owned Aircraft) as indebtedness of the
Company.

                                   ARTICLE III

                                   DEFINITIONS

            Section 3.01. Definitions. (a) For all purposes of the Basic
Agreement as supplemented by this Trust Supplement, the following capitalized
terms have the following meanings:

            Aircraft: Means the seven new Airbus A320 aircraft and fourteen new
      Airbus A319 aircraft which were sold or are expected to be sold to the
      Owner Trustee or the Company during the period from March 1999 through
      February 2000.

            Applicable Certificateholder: Means the holder of an Applicable
      Certificate.

            Class D Certificateholder: Means the holder of a Class D
      Certificate.

            Class D Certificates: Has the meaning assigned in the Intercreditor
      Agreement.

<PAGE>
                                                                               6


            Clearing Agency: Has the meaning specified in Section 1.01(e)
      hereof.

            Clearing Agency Participant: Means any of the participants in the
      Clearing Agency.

            Closing Notice: Has the meaning specified in the Note Purchase
      Agreement.

            Cut-off Date: Has the meaning specified in Section 1.01(b).

            Deposit Account: Means an account established under Section 1.2 of
      the Deposit Agreement.

            Deposit Agreement: Means the Deposit Agreement dated as of June 25,
      1999 relating to the Applicable Certificates between the Depositary and
      the Escrow Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            Deposit Make-Whole Amount: Has the meaning specified in the Note
      Purchase Agreement.

            Depositary: Means ABN AMRO Bank N.V., Chicago Branch.

            Deposits: Has the meaning specified in the Note Purchase Agreement.

            Distribution Date: Means any Regular Distribution Date or Special
      Distribution Date.

            Escrow Agent: Means initially, First Security Bank, National
      Association, and any replacement or successor therefor appointed in
      accordance with the Escrow Agreement.

            Escrow Agreement: Means the Escrow and Paying Agent Agreement dated
      as of June 25, 1999 relating to the Applicable Certificates, among the
      Escrow Agent, the Paying Agent, the Trustee and the Underwriters, as the
      same may be amended, supplemented or otherwise modified from time to time
      in accordance with its terms.

            Escrow Receipt: Means the receipt substantially in the form annexed
      to the Escrow Agreement representing a fractional undivided interest in
      the funds held in the Paying Agent Account (as defined in the Escrow
      Agreement)..

            Final Withdrawal: With respect to the Escrow Agreement, has the
      meaning set forth in Section 1.2 thereof.

            Final Withdrawal Date: Means the date on which the Final Withdrawal
      occurs.

<PAGE>
                                                                               7


            Intercreditor Agreement: Means the Intercreditor Agreement, dated as
      of the date hereof, by and among the Trustee, the Other Trustees, the
      Liquidity Providers named therein and State Street Bank and Trust Company,
      as Subordination Agent.

            Leased Aircraft: Has the meaning specified in the recitals hereto.

            Liquidity Facility: Has the meaning specified in the Note Purchase
      Agreement.

            Note Documents: With respect to any Equipment Note, means the Note
      Purchase Agreement, the related Indenture, the related Participation
      Agreement, and, if the related Aircraft is leased to the Company, the
      related Lease.

            Note Purchase Agreement: Means the Note Purchase Agreement, dated as
      of the date hereof, among the Company, the Trustee, the Other Trustees,
      State Street Bank and Trust Company, as Subordination Agent, the Escrow
      Agent and the Paying Agent.

            Notice of Purchase Withdrawal: Has the meaning specified in the Note
      Purchase Agreement.

            Other Agreements: Means the Basic Agreement as supplemented by Trust
      Supplement No. 1999-2B (the "1999-2B Trust Supplement") dated the date
      hereof relating to Northwest Airlines 1999-2B Pass Through Trust and by
      Trust Supplement No. 1999-2C (the "1999-2C Trust Supplement") dated the
      date hereof relating to the Northwest Airlines 1999-2C Pass Through Trust.

            Other Trustees: Means the trustee under the Other Agreements, and
      any successor or other trustee appointed as provided therein.

            Owned Aircraft: Has the meaning specified in the recitals hereto.

            Participation Agreement: Has the meaning specified in the Note
      Purchase Agreement.

            Paying Agent: Means State Street Bank and Trust Company.

            Pool Balance: Means, as of any date, (i) the original aggregate face
      amount of the Applicable Certificates less (ii) the aggregate amount of
      all payments made in respect of such Applicable Certificates or in respect
      of Deposits relating to the Applicable Trust other than payments made in
      respect of interest or premium thereon or reimbursement of any costs or
      expenses incurred in connection therewith. The Pool Balance as of any
      Distribution Date will be computed after giving effect to any special
      distribution with respect to unused Deposits, payment of principal of the
      Equipment Notes or payment with respect to other Trust Property and the
      distribution thereof to be made on that date.

<PAGE>
                                                                               8


            Prospectus Supplement: Means the Prospectus Supplement dated June
      18, 1999, relating to the offering of the Class A Certificates, the Class
      B Certificates and the Class C Certificates (each as defined in the
      Intercreditor Agreement).

            Pool Factor: Means, as of any Distribution Date, the quotient
      (rounded to the seventh decimal place) computed by dividing (i) the Pool
      Balance by (ii) the original aggregate face amount of the Applicable
      Certificates. The Pool Factor as of any Distribution Date shall be
      computed after giving effect to any special distribution with respect to
      unused Deposits, payment of principal of the Equipment Notes or other
      Trust Property and the distribution thereof to be made on that date.

            Record Date: Means the date preceding any Distribution Date on which
      the Applicable Certificateholders are determined for purposes of the
      distribution which will occur on such Distribution Date.

            Scheduled Closing Date: Has the meaning specified in the Note
      Purchase Agreement.

            Special Payment: Means any payment (other than a Scheduled Payment)
      in respect of, or any proceeds of, any Equipment Note.

            Special Redemption Premium: Means the Deposit Make-Whole Amount
      payable by the Company in respect of the Final Withdrawal pursuant to the
      Note Purchase Agreement.

            Trust Property: Means (i) the Equipment Notes held as the property
      of the Trust and, subject to the Intercreditor Agreement, all monies at
      any time paid thereon and all monies due and to become due thereunder,
      (ii) the rights of the Trust under the Escrow Agreement to request the
      Escrow Agent to withdraw from the Deposit Accounts funds sufficient to
      enable the Trust to purchase Equipment Notes on the delivery of an
      Aircraft, (iii) funds from time to time deposited in the Certificate
      Account and the Special Payments Account, and (iv) all rights of the Trust
      and the Trustee, on behalf of the Trust, under the Intercreditor
      Agreement, the Note Purchase Agreement and the Liquidity Facility,
      including, without limitation, all rights to receive certain payments
      thereunder, and all monies paid to the Trustee on behalf of the Trust
      pursuant to the Intercreditor Agreement or the Liquidity Facility.

            Trusts: Means, collectively, the Northwest Airlines 1999 Pass
      Through Trusts to be formed pursuant to the Basic Agreement, as
      supplemented by this Trust Supplement and the Other Agreements.

            Underwriters: Means the several Underwriters named in and who are
      parties to the Underwriting Agreement.

<PAGE>
                                                                               9


            Underwriting Agreement: Means the Underwriting Agreement dated as of
      June 18, 1999 by and among the Company, the Guarantor, Salomon Smith
      Barney Inc., Credit Suisse First Boston Corporation, ABN AMRO
      Incorporated, Credit Lyonnais Securities (USA) Inc. and Deutsche Bank
      Securities Inc.

                                   ARTICLE IV
                                   THE TRUSTEE

            Section 4.01. Delivery of Documents; Delivery Dates. (a) The Trustee
is hereby directed (i) to execute and deliver the Intercreditor Agreement, the
Escrow Agreement and the Note Purchase Agreement, each in the form delivered to
the Trustee by the Company and (ii) subject to the respective terms thereof, to
perform its obligations thereunder. Upon request of the Company and the
satisfaction or waiver of the closing conditions specified in the Underwriting
Agreement, the Trustee shall execute, deliver, authenticate, issue and sell
Applicable Certificates in authorized denominations equaling in the aggregate
the amount set forth, with respect to the Applicable Trust, in Schedule I to the
Underwriting Agreement evidencing the entire ownership interest in the Trust,
which amount equals the maximum aggregate principal amount of Equipment Notes
which may be purchased by the Trustee pursuant to the Note Purchase Agreement.
Except as provided in Sections 3.03, 3.04, 3.05 and 3.09 of the Basic Agreement,
the Trustee shall not execute, authenticate or deliver Applicable Certificates
in excess of the aggregate amount specified in this paragraph.

            (b) On or after the Issuance Date the Company may deliver from time
to time to the Trustee a Closing Notice relating to one or more Equipment Notes.
After receipt of a Closing Notice and in any case no later than two Business
Days prior to a Scheduled Closing Date as to which such Closing Notice relates
(the "Applicable Delivery Date"), the Trustee shall (as and when specified in
the Closing Notice) instruct the Escrow Agent to provide a Notice of Purchase
Withdrawal to the Depositary requesting (A) the withdrawal of one or more
Deposits on the Applicable Delivery Date in accordance with and to the extent
permitted by the terms of the Escrow Agreement and the Deposit Agreement and (B)
the payment of all, or a portion, of such Deposit or Deposits in an amount equal
in the aggregate to the purchase price of such Equipment Notes to or on behalf
of the Owner Trustee or the Company, as the case may be, issuing such Equipment
Notes, all as shall be described in the Closing Notice. The Trustee shall (as
and when specified in such Closing Notice), subject to the conditions set forth
in Section 3 of the Note Purchase Agreement, enter into and perform its
obligations under the Participation Agreement specified in such Closing Notice
(the "Applicable Participation Agreement") and cause such certificates,
documents and legal opinions relating to the Trustee to be duly delivered as
required by the Applicable Participation Agreement. If at any time prior to the
Applicable Delivery Date, the Trustee receives a notice of postponement pursuant
to Section 2(e) or 2(f) of the Note Purchase Agreement, then the Trustee shall
give the Depositary (with a copy to the Escrow Agent) a notice of cancellation
of such Notice of Purchase Withdrawal relating to such Deposit or Deposits on
such Applicable Delivery Date. Upon satisfaction of the conditions specified in
the Note Purchase Agreement and the Applicable Participation Agreement, the
Trustee shall purchase the applicable Equipment Notes with the proceeds of the
withdrawals of

<PAGE>
                                                                              10


one or more Deposits made on the Applicable Delivery Date in accordance with the
terms of the Deposit Agreement and the Escrow Agreement. The purchase price of
such Equipment Notes shall equal the principal amount of such Equipment Notes.
Amounts withdrawn from such Deposit or Deposits in excess of the purchase price
of the Equipment Notes or to the extent not applied on the Applicable Delivery
Date to the purchase price of the Equipment Notes, shall be re-deposited by the
Trustee with the Depositary on the Applicable Delivery Date in accordance with
the terms of the Deposit Agreement.

            Section 4.02. Withdrawal of Deposits. If any Deposits remain
outstanding on the Business Day next succeeding the Cut-off Date, (i) the
Trustee shall give the Escrow Agent notice that the Trustee's obligation to
purchase Equipment Notes under the Note Purchase Agreement has terminated and
instruct the Escrow Agent to provide a notice of Final Withdrawal to the
Depositary substantially in the form of Exhibit B to the Deposit Agreement (the
"Final Withdrawal Notice") and (ii) the Trustee will make a demand upon the
Company for an amount equal to the Special Redemption Premium, such payment to
be made on the Final Withdrawal Date.

            Section 4.03. The Trustee. (a) Subject to Section 4.04 of this Trust
Supplement and Section 7.14 of the Basic Agreement, the Trustee shall not be
responsible in any manner whatsoever for or in respect of the validity or
sufficiency of this Trust Supplement, the Deposit Agreement or the Escrow
Agreement or the due execution hereof or thereof by the Company or the other
parties thereto (other than the Trustee), or for or in respect of the recitals
and statements contained herein or therein, all of which recitals and statements
are made solely by the Company.

            (b) Except as herein otherwise provided, no duties, responsibilities
or liabilities are assumed, or shall be construed to be assumed by the Trustee
by reason of this Trust Supplement other than as set forth in the Basic
Agreement, and this Trust Supplement is executed and accepted on behalf of the
Trustee, subject to all the terms and conditions set forth in the Basic
Agreement, upon the effectiveness thereof, as fully to all intents as if the
same were herein set forth at length.

            Section 4.04. Representations and Warranties of the Trustee. The
Trustee hereby represents and warrants that:

                  (a) the Trustee has full power, authority and legal right to
            execute, deliver and perform this Trust Supplement, the
            Intercreditor Agreement, the Escrow Agreement and the Note Documents
            to which it is a party and has taken all necessary action to
            authorize the execution, delivery and performance by it of this
            Trust Supplement, the Intercreditor Agreement, the Escrow Agreement
            and the Note Documents to which it is a party;

                  (b) the execution, delivery and performance by the Trustee of
            this Trust Supplement, the Intercreditor Agreement, the Escrow
            Agreement and the Note Documents to which it is a party (i) will not
            violate any provision of any

<PAGE>
                                                                              11


            United States federal law or the law of the state of the United
            States where it is located governing the banking and trust powers of
            the Trustee or any order, writ, judgment, or decree of any court,
            arbitrator or governmental authority applicable to the Trustee or
            any of its assets, (ii) will not violate any provision of the
            articles of association or by-laws of the Trustee, and (iii) will
            not violate any provision of, or constitute, with or without notice
            or lapse of time, a default under, or result in the creation or
            imposition of any lien on any properties included in the Trust
            Property pursuant to the provisions of any mortgage, indenture,
            contract, agreement or other undertaking to which it is a party,
            which violation, default or lien could reasonably be expected to
            have an adverse effect on the Trustee's performance or ability to
            perform its duties hereunder or thereunder or on the transactions
            contemplated herein or therein;

                  (c) the execution, delivery and performance by the Trustee of
            this Trust Supplement, the Intercreditor Agreement, the Escrow
            Agreement and the Note Documents to which it is a party will not
            require the authorization, consent, or approval of, the giving of
            notice to, the filing or registration with, or the taking of any
            other action in respect of, any governmental authority or agency of
            the United States or the state of the United States where it is
            located regulating the banking and corporate trust activities of the
            Trustee; and

                  (d) this Trust Supplement, the Intercreditor Agreement, the
            Escrow Agreement and the Note Documents to which it is a party have
            been, or will be, as applicable, duly executed and delivered by the
            Trustee and constitute, or will constitute, as applicable, the
            legal, valid and binding agreements of the Trustee, enforceable
            against it in accordance with their respective terms; provided,
            however, that enforceability may be limited by (i) applicable
            bankruptcy, insolvency, reorganization, moratorium or similar laws
            affecting the rights of creditors generally and (ii) general
            principles of equity.

            Section 4.05. Trustee Liens. The Trustee in its individual capacity
agrees, in addition to the agreements contained in Section 7.16 of the Basic
Agreement, that it will, at its own cost and expense, promptly take any action
as may be necessary to duly discharge and satisfy in full any Trustee's liens on
or with respect to the Trust Property which is attributable to the Trustee in
its individual capacity and which is unrelated to the transactions contemplated
by the Intercreditor Agreement or the Note Purchase Agreement.

                                    ARTICLE V
                             SUPPLEMENTAL AGREEMENT

            Section 5.01. Supplemental Agreements Without Consent of
Certificateholders.

            (a) Under the terms of, and subject to the limitations contained in,
Section 9.01 of the Basic Agreement, the Company may (but will not be required
to), and the Trustee (subject to Section 9.03 of the Basic Agreement) shall, at
the Company's request, at any time and from time

<PAGE>
                                                                              12


to time, enter into one or more agreements supplemental to the Escrow Agreement,
the Note Purchase Agreement or the Deposit Agreement, for any of the purposes
set forth in clauses (1) through (7) of such Section 9.01, except that (a)
clause (3) of such Section 9.01 shall be deemed to include the Company's rights
and powers conferred by the Note Purchase Agreement and (b) clause (4) of such
Section 9.01 shall be deemed to include corrections or supplements to provisions
of the Escrow Agreement or the Deposit Agreement which may be defective or
inconsistent with any other provision of this Agreement or contained in any
agreement referred to in such clause (4) and the curing of any ambiguity or the
modification of any other provision with respect to matters or questions arising
under the Escrow Agreement or the Deposit Agreement.

            (b) If Class D Certificates are issued, the Company, the Guarantor
and the Trustee, without the consent of the Applicable Certificateholders, may
enter into an agreement supplemental to this Trust Supplement whereby Class D
Certificateholders shall be granted purchase rights similar to those set forth
in Section 7.01 hereof.

            (c) Any supplemental agreement entered into pursuant to Sections
5.01(a) and (b) may not adversely affect the status of the Trust for U.S.
federal income tax purposes, as either (i) a grantor trust under Subpart E, Part
I of Subchapter J of Chapter 1 of Subtitle A of the Code or (ii) a partnership.

            Section 5.02. Supplement Agreements with Consent of
Certificateholders. The provisions of Section 9.02 of the Basic Agreement shall
apply to agreements or amendments for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of the Escrow
Agreement, the Deposit Agreement or the Note Purchase Agreement to the extent
applicable to the Certificateholders approving such agreement or amendment or
modifying in any manner the rights and obligations of such Certificateholders
under the Escrow Agreement, the Deposit Agreement or the Note Purchase
Agreement; provided that the provisions of Section 9.02(1) of the Basic
Agreement shall be deemed to include reductions in any manner of, or delay in
the timing of, any receipt by the Certificateholders of payments upon the
Deposits.

                                   ARTICLE VI
                 DISTRIBUTIONS; STATEMENT TO CERTIFICATEHOLDERS

            Section 6.01. Additions to Article IV of the Basic Agreement. In
addition to the provisions of Article IV of the Basic Agreement, the following
provisions shall apply to the Trust:

            (a) Upon the payment of Special Redemption Premium to the Trustee
      under the Note Purchase Agreement, the Trustee, upon receipt thereof,
      shall immediately deposit the aggregate amount of such Special Redemption
      Premium in the Special Payments account;

<PAGE>
                                                                              13


            (b) The distribution of amounts of Special Redemption Premium as
      provided for in Section 4.02(b) of the Basic Agreement shall be on the
      Special Distribution Date with respect to such Special Payment or as soon
      thereafter as the Trustee has confirmed receipt of the related Special
      Redemption Premium;

            (c) In the event of the payment of a Special Redemption Premium by
      the Company to the Trustee under the Note Purchase Agreement, the notice
      provided for in Section 4.02(c) of the Basic Agreement shall be mailed,
      together with the notice by the Paying Agent under Section 2.6 of the
      Escrow Agreement, not less that 15 days prior to the Special Distribution
      Date for such amount, which Special Distribution Date shall be the Final
      Withdrawal Date: and

            (d) The last sentence of the first paragraph of Section 4.02(c) of
      the Basic Agreement shall apply equally if the amount of Special
      Redemption Premium, if any, has not been calculated at the time the
      Trustee mails notice of a Special Payment.

            Section 6.02. Statements to Applicable Certificateholders; Federal
Income Tax Reporting. (a) On each Distribution Date, the Trustee will include
with each distribution to Applicable Certificateholders of a Scheduled Payment
or Special Payment, as the case may be, a statement setting forth the
information provided below (in the case of a Special Payment, including any
Special Redemption Premium, reflecting in part the information provided by the
Paying Agent under the Escrow Agreement). Such statement shall set forth (per
$1,000 face amount Applicable Certificate as to (ii), (iii), (iv) and (v) below)
the following information:

            (i) the aggregate amount of funds distributed on such Distribution
      Date under the Agreement and under the Escrow Agreement, indicating the
      amount allocable to each source;

            (ii) the amount of such distribution under the Agreement allocable
      to principal and the amount allocable to premium (including the Special
      Redemption Premium), if any;

            (iii) the amount of such distribution under the Agreement allocable
      to interest;

            (iv) the amount of such distribution under the Escrow Agreement
      allocable to interest;

            (v) the amount of such distribution under the Escrow Agreement
      allocable to Deposits; and

            (vi) the Pool Balance and the Pool Factor.

            With respect to the Applicable Certificates registered in the name
of a Clearing Agency, on the Record Date prior to each Distribution Date, the
Trustee will request from such Clearing Agency a securities position listing
setting forth the names of all Clearing Agency

<PAGE>
                                                                              14


Participants reflected on such Clearing Agency's books as holding interests in
the Applicable Certificates on such Record Date. On each Distribution Date, the
Trustee will mail to each such Clearing Agency Participant the statement
described above and will make available additional copies as requested by such
Clearing Agency Participant for forwarding to holders of interests in the
Applicable Certificates.

            (b) Within a reasonable period of time after the end of each
calendar year but not later than the latest date permitted by law, the Trustee
shall furnish to each Person who at any time during such calendar year was an
Applicable Certificateholder of record a statement containing the sum of the
amounts determined pursuant to clauses (a)(i), (a)(ii), (a)(iii), (a)(iv) and
(a)(v) above for such calendar year or, in the event such Person was an
Applicable Certificateholder of record during a portion of such calendar year,
for such portion of such year, and such other items as are readily available to
the Trustee and which an Applicable Certificateholder shall reasonably request
as necessary for the purpose of such Applicable Certificateholder's preparation
of its federal income tax returns. Such statement and such other items shall be
prepared on the basis of information supplied to the Trustee by the Clearing
Agency Participants and shall be delivered by the Trustee to such Clearing
Agency Participants to be available for forwarding by such Clearing Agency
Participants to the holders of interests in the Applicable Certificates in the
manner described in Section 6.02(a) hereof.

            (c) Promptly following (i) the Cut-off Date, if there has been any
change in the information set forth in clauses (x) and (y) below from that set
forth in page S-37 of the Prospectus Supplement, and (ii) any early redemption
or purchase of, or any default in the payment of principal or interest in
respect of, any of the Equipment Notes held in the Applicable Trust, or any
Final Withdrawal, the Trustee shall furnish to Applicable Certificateholders of
record on such date a statement setting forth (x) the expected Pool Factors for
each subsequent Regular Distribution Date following the Cut-off Date and (y) the
expected principal distribution schedule of the Equipment Notes, in the
aggregate, held as Trust Property at the date of such notice. With respect to
the Applicable Certificates registered in the name of a Clearing Agency, on the
Cut-off Date, the Trustee will request from such Clearing Agency a securities
position listing setting forth the names of all Clearing Agency Participants
reflected on such Clearing Agency's books as holding interests in the Applicable
Certificates on such date. The Trustee will mail to each such Clearing Agency
Participant the statement described above and will make available additional
copies as requested by such Clearing Agency Participant for forwarding to
holders of interests in the Applicable Certificates.

            (d) Unless and until required otherwise by applicable authority, the
Trustee shall treat the Trust as a "grantor trust" under Subpart E, Part I,
Subchapter J of Chapter 1 of the Code, and shall file annually with the Internal
Revenue Service Form 1041, indicating the name and address of the Trust and
otherwise completed in blank, with attached statements identifying each
Certificateholder and its pro rata share of the income and expenses of the Trust
for the applicable portion of the preceding calendar year, on the cash or
accrual method, as the case may be, and shall furnish each Certificateholder
with a copy of its statement at the time and in the manner required by the Code.

<PAGE>
                                                                              15


            (e) This Section 6.02 supersedes and replaces Section 4.03 of the
Basic Agreement.

                                   ARTICLE VII
                                     DEFAULT

            Section 7.01. Purchase Rights of Certificateholders. By acceptance
of its Applicable Certificate, each Applicable Certificateholder agrees that at
any time after the occurrence and during the continuation of a Triggering Event,

            (a) each Class B Certificateholder shall have the right to purchase
      all, but not less than all, of the Applicable Certificates upon ten days'
      written notice to the Trustee and each other Class B Certificateholder,
      provided that (A) if prior to the end of such ten-day period any other
      Class B Certificateholder notifies such purchasing Class B
      Certificateholder that such other Class B Certificateholder wants to
      participate in such purchase, then such other Class B Certificateholder
      may join with the purchasing Class B Certificateholder to purchase all,
      but not less than all, of the Applicable Certificates pro rata based on
      the fractional undivided interest in the Class B Trust held by each such
      Class B Certificateholder and (B) if prior to the end of such ten-day
      period any other Class B Certificateholder fails to notify the purchasing
      Class B Certificateholder of such other Class B Certificateholder's desire
      to participate in such a purchase, then such other Class B
      Certificateholder shall lose its right to purchase the Applicable
      Certificates pursuant to this Section 7.01(a); and

            (b) each Class C Certificateholder shall have the right (which shall
      not expire upon any purchase of the Applicable Certificates pursuant to
      paragraph (a) above) to purchase all, but not less than all, of the
      Applicable Certificates and the Class B Certificates upon ten days'
      written notice to the Trustee, the Class B Trustee and each other Class C
      Certificateholder, provided that (A) if prior to the end of such ten-day
      period any other Class C Certificateholder notifies such purchasing Class
      C Certificateholder that such other Class C Certificateholder wants to
      participate in such purchase, then such other Class C Certificateholder
      may join with the purchasing Class C Certificateholder to purchase all,
      but not less than all, of the Applicable Certificates and the Class B
      Certificates pro rata based on the fractional undivided interest in the
      Class C Trust held by each such Class C Certificateholder and (B) if prior
      to the end of such ten-day period any other Class C Certificateholder
      fails to notify the purchasing Class C Certificateholder of such other
      Class C Certificateholder's desire to participate in such a purchase, then
      such other Class C Certificateholder shall lose its right to purchase the
      Applicable Certificates pursuant to this Section 7.01(b).

            The purchase price with respect to the Applicable Certificates shall
be equal to the Pool Balance of the Applicable Certificates, together with
accrued and unpaid interest thereon to the date of such purchase, without
premium, but including any other amounts then due and payable to the Applicable
Certificateholders under this Agreement, the Intercreditor

<PAGE>
                                                                              16


Agreement, the Escrow Agreement or any Note Document or on or in respect of the
Applicable Certificates; provided, however, that (i) if such purchase occurs
after the record date specified in Section 2.3(b) of the Escrow Agreement
relating to the distribution of unused Deposits and accrued and unpaid interest
thereunder, such purchase price shall be reduced by the aggregate amount of
unused Deposits and interest to be distributed under the Escrow Agreement (which
deducted amounts shall remain distributable to, and may be retained by, the
Applicable Certificateholder as of such record date) and (ii) if such purchase
occurs after a Record Date, such purchase price shall be reduced by the amount
to be distributed hereunder on the related Distribution Date (which deducted
amounts shall remain distributable to, and may be retained by, the Applicable
Certificateholder as of such Record Date); provided further that no such
purchase of Applicable Certificates shall be effective unless the purchaser(s)
shall certify to the Trustee that contemporaneously with such purchase, such
purchaser(s) is purchasing, pursuant to the terms of this Agreement and the
Other Agreements, the Applicable Certificates and the Class B Certificates which
are senior to the securities held by such purchaser(s). Each payment of the
purchase price of the Applicable Certificates referred to in the first sentence
hereof shall be made to an account or accounts designated by the Trustee and
each such purchase shall be subject to the terms of this Section 7.01. Each
Applicable Certificateholder agrees by its acceptance of its Applicable
Certificate that it will, subject to Section 3.04 of the Basic Agreement, upon
payment from such Class B Certificateholder(s) or Class C Certificateholder(s),
as the case may be, of the purchase price set forth in the first sentence of
this paragraph, forthwith sell, assign, transfer and convey to the purchaser(s)
thereof (without recourse, representation or warranty of any kind except for its
own acts), all of the right, title, interest and obligation of such Applicable
Certificateholder in this Agreement, the Escrow Agreement, the Deposit
Agreement, the Intercreditor Agreement, the Liquidity Facility, the Note
Documents and all Applicable Certificates and Escrow Receipts held by such
Applicable Certificateholder (excluding all right, title and interest under any
of the foregoing to the extent such right, title or interest is with respect to
an obligation not then due and payable as respects any action or inaction or
state of affairs occurring prior to such sale) and the purchaser shall assume
all of such Applicable Certificateholder's obligations under this Agreement, the
Escrow Agreement, the Deposit Agreement, the Intercreditor Agreement, the
Liquidity Facility, the Note Documents and all such Applicable Certificates and
Escrow Receipts. The Applicable Certificates will be deemed to be purchased on
the date payment of the purchase price is made notwithstanding the failure of
the Applicable Certificateholders to deliver any Applicable Certificates and,
upon such a purchase, (i) the only rights of the Applicable Certificateholders
will be to deliver the Applicable Certificates to the purchaser(s) and receive
the purchase price for such Applicable Certificates and (ii) if the purchaser(s)
shall so request, such Applicable Certificateholder will comply with all the
provisions of Section 3.04 of the Basic Agreement to enable new Applicable
Certificates to be issued to the purchaser in such denominations as it shall
request. All charges and expenses in connection with the issuance of any such
new Applicable Certificates shall be borne by the purchaser thereof.

            As used in this Section 7.01, the terms "Class B Certificateholder",
"Class B Trust", "Class B Certificate", "Class B Trustee", "Class C
Certificateholder", "Class C Trust", "Class C Certificate" and "Class C Trustee"
shall have the respective meanings assigned to such terms in the Intercreditor
Agreement.

<PAGE>
                                                                              17


            (c) This Section 7.01 supersedes and replaces Section 6.01(b) of the
Basic Agreement.

                                  ARTICLE VIII
                            MISCELLANEOUS PROVISIONS

            Section 8.01. Basic Agreement Ratified. Except and so far as herein
expressly provided, all of the provisions, terms and conditions of the Basic
Agreement are in all respects ratified and confirmed; and the Basic Agreement
and this Trust Supplement shall be taken, read and construed as one and the same
instrument.

            Section 8.02. GOVERNING LAW. THIS TRUST SUPPLEMENT AND THE SERIES
1999-2A CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK.

            Section 8.03. Execution in Counterparts. This Trust Supplement may
be executed in any number of counterparts, each of which shall be an original,
but such counterparts shall together constitute but one and the same instrument.

<PAGE>
                                                                              18


            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:

<PAGE>
                                                                              18


            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By: /s/ Donald E. Smith
                                          ---------------------------------
                                          Name:  Donald E. Smith
                                          Title: Vice President
<PAGE>

                                    EXHIBIT A

                               FORM OF CERTIFICATE

            Unless this certificate is presented by an authorized representative
of The Depository Trust Company, a New York corporation ("DTC"), to Issuer or
its agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co. or in such other name as is
requested by an authorized representative of DTC (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch the registered owner hereof,
Cede & Co., has an interest herein.

            Any person acquiring this Certificate by its acceptance hereof or
its interest herein, will be deemed to represent and warrant to and for the
benefit of each Owner Participant and the Company that either (i) the assets of
an employee benefit plan subject to Title I of the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"), or of a plan subject to Section 4975
of the Internal Revenue Code of 1986, as amended (the "Code") or of entities
which may be deemed to hold such plans, have not been used to purchase this
Certificate or (ii) one or more prohibited transaction statutory or
administrative exemptions applies such that the use of such plan assets to
purchase and hold this Certificate will not constitute a non-exempt prohibited
transaction under ERISA or Section 4975 of the Code.

                  NORTHWEST AIRLINES 1999-2A PASS THROUGH TRUST

                                  Pass Through
                           Certificate, Series 1999-2A

                          Issuance Date: June 25, 1999

                Final Legal Distribution Date: September 1, 2020

      Evidencing A Fractional undivided interest In the Northwest Airlines
      1999-2A Pass Through Trust, The Property Of Which Includes Certain
      Equipment Notes Each Secured By An Aircraft Leased To Or Owned By
      Northwest Airlines, Inc.

Certificate
No. ____       $________ Fractional undivided interest representing 0.__% of the
               Trust per $1,000 of Reference Principal Amount

            THIS CERTIFIES THAT _______________, for value received, is the
registered owner of a Fractional Undivided Interest in the amount of $_______
(the "Reference Principal Amount") in the Northwest Airlines 1999-2A Pass
Through Trust (the "Trust") created by State Street Bank and Trust Company of
Connecticut, National Association, as trustee (the "Trustee"), pursuant to a
Pass Through Trust Agreement, dated as of June 3, 1999 (as amended or

<PAGE>
                                                                               2


supplemented, the "Basic Agreement"), by and among the Trustee, Northwest
Airlines Corporation, a Delaware corporation (the "Guarantor"), and Northwest
Airlines, Inc., a Minnesota corporation (the "Company"), as supplemented by
Trust Supplement No. 1999-2A thereto, dated as of June 25, 1999 (collectively,
the "Agreement"), by and among the Trustee, the Guarantor and the Company, a
summary of certain of the pertinent provisions of which is set forth below. To
the extent not otherwise defined herein, the capitalized terms used herein have
the meanings assigned to them in the Agreement. This Certificate is one of the
duly authorized Certificates designated as "Pass Through Certificates, Series
1999-2A" (herein called the "Certificates"). This Certificate is issued under
and is subject to the terms, provisions and conditions of the Agreement and the
Intercreditor Agreement, to which Agreement the Certificateholder of this
Certificate by virtue of the acceptance hereof assents and by which such
Certificateholder is bound. The property of the Trust includes certain Equipment
Notes and all rights of the Trust to receive payments under the Intercreditor
Agreement and the Liquidity Facility (the "Trust Property"). Each issue of the
Equipment Notes is secured by a security interest in the Aircraft leased to or
owned by the Company.

            Each of the Certificates represents a Fractional Undivided Interest
in the Trust and the Trust Property and has no rights, benefits or interest in
respect of any other separate trust established pursuant to the terms of the
Basic Agreement for any other series of certificates issued pursuant thereto.

            Subject to and in accordance with the terms of the Agreement and the
Intercreditor Agreement, from funds then available to the Trustee, there will be
distributed on each March 1 and September 1 (a "Regular Distribution Date"),
commencing March 1, 2000 to the Person in whose name this Certificate is
registered at the close of business on the 15th day preceding the Regular
Distribution Date, an amount in respect of the Scheduled Payments on the
Equipment Notes due on such Regular Distribution Date, the receipt of which has
been confirmed by the Trustee, equal to the product of the percentage interest
in the Trust evidenced by this Certificate and an amount equal to the sum of
such Scheduled Payments. Subject to and in accordance with the terms of the
Agreement and the Intercreditor Agreement, in the event that Special Payments on
the Equipment Notes are received by the Trustee, from funds then available to
the Trustee, there shall be distributed on the applicable Special Distribution
Date, to the Person in whose name this Certificate is registered at the close of
business on the 15th day preceding the Special Distribution Date, an amount in
respect of such Special Payments on the Equipment Notes, the receipt of which
has been confirmed by the Trustee, equal to the product of the percentage
interest in the Trust evidenced by this Certificate and an amount equal to the
sum of such Special Payments so received. If a Regular Distribution Date or
Special Distribution Date is not a Business Day, distribution shall be made on
the immediately following Business Day with the same force and effect as if made
on such Regular Distribution Date or Special Distribution Date and no interest
shall accrue during the intervening period. The Trustee shall mail notice of
each Special Payment and the Special Distribution Date therefor to the
Certificateholder of this Certificate.

            Distributions on this Certificate will be made by the Trustee by
check mailed to the Person entitled thereto, without the presentation or
surrender of this Certificate or the making

<PAGE>
                                                                               3


of any notation hereon, except that with respect to Certificates registered on
the Record Date in the name of a Clearing Agency (or its nominee), such
distribution shall be made by wire transfer. Except as otherwise provided in the
Agreement and notwithstanding the above, the final distribution on this
Certificate will be made after notice mailed by the Trustee of the pendency of
such distribution and only upon presentation and surrender of this Certificate
at the office or agency of the Trustee specified in such notice.

            The Certificates do not represent an obligation of, or an obligation
guaranteed by, or an interest in, the Guarantor, the Company or the Trustee or
any affiliate thereof. The Certificates are limited in right or payment, all as
more specifically set forth herein and in the Agreement. All payments or
distributions made to Certificateholders under the Agreement shall be made only
from the Trust Property and only to the extent that the Trustee shall have
sufficient income or proceeds from the Trust Property to make such payments in
accordance with the terms of the Agreement. Each Certificateholder of this
Certificate, by its acceptance hereof, agrees that it will look solely to the
income and proceeds from the Trust Property to the extent available for
distribution to such Certificateholder as provided in the Agreement. This
Certificate does not purport to summarize the Agreement and reference is made to
the Agreement for information with respect to the interests, rights, benefits,
obligations, proceeds, and duties evidenced hereby. A copy of the Agreement may
be examined during normal business hours at the principal office of the Trustee,
and at such other places, if any, designated by the Trustee, by any
Certificateholder upon request.

            The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Guarantor or the Company and the rights of the Certificateholders under the
Agreement at any time by the Guarantor, the Company and the Trustee with the
consent of the Certificateholders holding Certificates evidencing Fractional
Undivided Interests aggregating not less than a majority in interest in the
Trust. Any such consent by the Certificateholder of this Certificate shall be
conclusive and binding on such Certificateholder and upon all future
Certificateholders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange hereof or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Certificateholders of any of the Certificates.

            As provided in the Agreement and subject to certain limitations set
forth, the transfer of this Certificate is registrable in the Register upon
surrender of this Certificate for registration of transfer at the offices or
agencies maintained by the Trustee in its capacity as Registrar, or by any
successor Registrar, duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Registrar duly executed by
the Certificate-holder hereof or such Certificateholder's attorney duly
authorized in writing, and thereupon one or more new Certificates of authorized
denominations evidencing the same aggregate Fractional Undivided Interest in the
Trust will be issued to the designated transferee or transferees.

            The Certificates are issuable only as registered Certificates
without coupons in minimum denominations of $1,000 Fractional Undivided
Interests and integral multiples thereof.

<PAGE>
                                                                               4


As provided in the Agreement and subject to certain limitations therein set
forth, the Certificates are exchangeable for new Certificates of authorized
denominations evidencing the same aggregate Fractional Undivided Interest in the
Trust, as requested by the Certificateholder surrendering the same.

            No service charge will be made for any such registration of transfer
or exchange, but the Trustee shall require payment of a sum sufficient to cover
any tax or governmental charge payable in connection therewith.

            Each Certificateholder or beneficial owner of a Certificate, by its
acceptance of this Certificate or a beneficial interest herein, agrees to treat
the Trust as a grantor trust for all U.S. federal, state and local income tax
purposes.

            The Trustee, the Registrar, and any agent of the Trustee or the
Registrar may treat the person in whose name this Certificate is registered as
the owner hereof for all purposes, and neither the Trustee, the Registrar, nor
any such agent shall be affected by any notice to the contrary.

            The obligations and responsibilities created by the Agreement and
the Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to
the Agreement and the disposition of all property held as part of the Trust
Property.

            THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT GIVING
EFFECT TO THE CONFLICT OF LAWS PROVISIONS OF THE STATE OF NEW YORK.

            Unless the certificate of authentication hereon has been executed by
the Trustee, by manual signature, this Certificate shall not be entitled to any
benefit under the Agreement or be valid for any purpose.

            IN WITNESS WHEREOF, the Trustee has caused this Certificate to be
duly executed.

                                      NORTHWEST AIRLINES 1999-2A
                                        PASS THROUGH TRUST

                                      By:      STATE STREET BANK AND TRUST
                                               COMPANY OF CONNECTICUT,
                                               NATIONAL ASSOCIATION, as Trustee


                                           By: ________________________________
                                               Name:
                                               Title:

<PAGE>
                                                                               5

               FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

      This is one of the Certificates referred to in the within-mentioned
Agreement.

STATE STREET BANK AND TRUST
  COMPANY OF CONNECTICUT,
  NATIONAL ASSOCIATION,
  as Trustee


By:  _____________________________
     Name:
     Title:

<PAGE>

                                    EXHIBIT B

                          DTC Letter of Representations

<PAGE>

                                    EXHIBIT C

                           REGULAR DISTRIBUTION DATES
                                       AND
                               SCHEDULED PAYMENTS

               Regular Distribution Date           Scheduled Payment
               -------------------------           -----------------

               March 1, 2000...................... $ 1,770,654.15
               September 1, 2000..................   2,665,566.27
               March 1, 2001......................   8,376,207.30
               September 1, 2001..................   5,492,087.10
               March 1, 2002......................   5,492,088.00
               September 1, 2002..................   5,492,086.65
               March 1, 2003......................   5,492,087.55
               September 1, 2003..................   5,492,088.00
               March 1, 2004......................   5,492,086.65
               September 1, 2004..................   4,368,904.65
               March 1, 2005......................   4,368,904.20
               September 1, 2005..................   4,368,904.20
               March 1, 2006......................   4,368,904.20
               September 1, 2006..................   4,368,903.75
               March 1, 2007......................   4,368,904.65
               September 1, 2007..................   4,368,904.20
               March 1, 2008......................   4,368,904.20
               September 1, 2008..................   4,368.903.75
               March 1, 2009......................   4,368,903.75
               September 1, 2009..................   5,805,002.25
               March 1, 2010......................   5,805,001.35
               September 1, 2010..................   5,805,001.35
               March 1, 2011......................   5,805,002.25
               September 1, 2011..................   5,805,000.90
               March 1, 2012......................   7,306,873.33
               September 1, 2012..................   4,303.126.67
               March 1, 2013......................  10,906,559.51
               September 1, 2013..................   6,380,837.09
               March 1, 2014......................  17,735,886.57
               September 1, 2014..................     294,595.11
               March 1, 2015......................  28,712,814.14
               March 1, 2016......................  28,130,175.73
               March 1, 2017......................  53,568,778.00
               September 1, 2017..................   5,112,630.12
               March 1, 2018......................  47,514,147.72
               September 1, 2018..................   4,622,397.81
               March 1, 2019......................  10,186,176.88



                                                                  EXECUTION COPY

            This Trust Supplement No. 1999-2B, dated as of June 25, 1999 (herein
called the "Trust Supplement"), by and among Northwest Airlines Corporation, a
Delaware corporation (the "Guarantor"), Northwest Airlines, Inc., a Minnesota
corporation (the "Company"), and State Street Bank and Trust Company of
Connecticut, National Association (the "Trustee"), to the Pass Through Trust
Agreement, dated as of June 3, 1999, by and among the Guarantor, the Company and
the Trustee (the "Basic Agreement").

                              W I T N E S S E T H:

            WHEREAS, the Basic Agreement, unlimited as to the aggregate
principal amount of Certificates which may be issued thereunder, has heretofore
been executed and delivered;

            WHEREAS, unless otherwise specified herein, capitalized terms used
herein without definition having the respective meanings specified heretofore in
the Basic Agreement;

            WHEREAS, the Company intends to finance the acquisition of seven new
Airbus A320 aircraft and fourteen new Airbus A319 aircraft either (i) through
separate leveraged lease transactions, in which case the Company will lease such
aircraft (collectively, the "Leased Aircraft") or (ii) through separate secured
loan transactions, in which case the Company will own such aircraft
(collectively, the "Owned Aircraft");

            WHEREAS, in the case of each Owned Aircraft, each Owner Trustee,
acting on behalf of its respective Owner Participant, will issue, on a
non-recourse basis, Equipment Notes, among other things, to finance a portion of
the purchase price of such Leased Aircraft purchased or to be purchased by such
Owner Trustee and leased or to be leased to the Company pursuant to the related
Lease;

            WHEREAS, in the case of an Owned Aircraft, the Company will issue
Equipment Notes to finance a portion of the purchase price of such Owned
Aircraft;

            WHEREAS, pursuant to the terms and conditions of the Basic Agreement
as supplemented by this Trust Supplement (the "Agreement"), the Trustee shall
purchase such Equipment Notes issued by each Owner Trustee or the Company, as
the case may be, having the same interest rate as, and final maturity dates not
later than the final Regular Distribution Date of, the Certificates issued
hereunder and shall hold such Equipment Notes in trust for the benefit of the
Certificateholders;

            WHEREAS, the Trustee hereby declares the creation of this Trust (the
"1999-2B Trust" or the "Applicable Trust") for the benefit of the
Certificateholders, and the initial Certificateholders as the grantors of the
1999-2B Trust, by their respective acceptances of the Certificates, join in the
creation of this 1999-2B Trust with the Trustee;

            WHEREAS, all of the conditions and requirements necessary to make
this Trust Supplement, when duly executed and delivered, a valid, binding and
legal instrument in accordance with its terms and for the purposes herein
expressed, have been done, performed and

<PAGE>
                                                                               2

fulfilled, and the execution and delivery of this Trust Supplement in the form
and with the terms hereof have been in all respects duly authorized; and

            WHEREAS, this Trust Supplement is subject to the provisions of the
Trust Indenture Act of 1939, as amended, and shall, to the extent applicable, be
governed by such provisions.

            NOW THEREFORE, in consideration of the premises herein, it is agreed
by and among the Guarantor, the Company and the Trustee as follows:

                                    ARTICLE I
                                THE CERTIFICATES

            Section 1.01. The Certificates. There is hereby created a series of
Certificates to be issued under the Agreement to be distinguished and known as
"Pass Through Certificates, Series 1999-2B" (hereinafter defined as the "Series
1999-2B Certificates" or the "Applicable Certificates"). Each Series 1999-2B
Certificate represents a Fractional Undivided Interest in the 1999-2B Trust
created hereby.

            The terms and conditions applicable to the Series 1999-2B
Certificates are as follows:

            (a) The aggregate principal amount of the Series 1999-2B
      Certificates that shall be authenticated under the Agreement (except for
      Series 1999-2B Certificates authenticated and delivered pursuant to
      Sections 3.03, 3.04 and 3.05 of the Basic Agreement) upon their initial
      issuance is $109,858,000.

            (b) The Cut-off Date is the earlier of (i) May 31, 2000 and (ii) the
      day Equipment Notes with respect to all of the Aircraft (as defined below)
      have been acquired by the Applicable Trust.

            (c) The Regular Distribution Dates with respect to any payment of
      Scheduled Payments means each March 1 and September 1, commencing on March
      1, 2000, until payment of all of the Scheduled Payments to be made under
      the Equipment Notes has been made.

            (d) The Special Distribution Dates are as follows: (i) when used
      with respect to the redemption or purchase of any Equipment Notes, the day
      (which shall be a Business Day) on which such redemption or purchase is
      scheduled to occur pursuant to the terms of the applicable Indenture and
      (ii) when used with respect to a Special Payment other than as described
      in clause (i) above, 15 days after the last date on which the Trustee must
      give notice pursuant to Section 4.02(c) of the Basic Agreement (or the
      next Business Day after such 15th day if such date is not a Business Day).

            (e) (i) The Series 1999-2B Certificates shall be in the form
      attached hereto as Exhibit A. Each purchaser of Series 1999-2B
      Certificates, by its acceptance of such

<PAGE>
                                                                               3


      Certificate or its interest therein, will be deemed to represent and
      warrant to and for the benefit of each Owner Participant and the Company
      that either (x) the assets of an employee benefit plan subject to Title I
      of the Employee Retirement Income Security Act of 1974, as amended
      ("ERISA"), or of a plan subject to Section 4975 of the Internal Revenue
      Code of 1986, as amended (the "Code") or of entities which may be deemed
      to hold such plans, have not been used to purchase Series 1999-2B
      Certificates or (y) one or more prohibited transaction statutory or
      administrative exemptions applies such that the use of such plan assets to
      purchase and hold such Certificate will not constitute a non-exempt
      prohibited transaction under ERISA or Section 4975 of the Code.

            (ii) The Series 1999-2B Certificates shall be Book-Entry
      Certificates and shall be subject to the conditions set forth in the
      Letter of Representations among the Guarantor, the Company and the
      Clearing Agency (the "Clearing Agency") attached hereto as Exhibit B.

            (f) The Scheduled Payments of principal shall be as set forth in
      Exhibit C hereto.

            (g) The proceeds of the Series 1999-2B Certificates shall be
      deposited in the Deposit Accounts and will be used in accordance with the
      Escrow Agreement and the Deposit Agreement.

            (h) When each Aircraft is delivered, either the Owner Trustee (in
      the case of a Leased Aircraft), acting on behalf of its respective Owner
      Participant, will issue on a non-recourse basis, or the Company (in the
      case of an Owned Aircraft) will issue on a recourse basis, the Equipment
      Notes, the proceeds of which shall be used, among other things, to finance
      a portion of the purchase price to such Owner Trustee or the Company, as
      the case may be, of the following Aircraft:

    Registration Number              Aircraft Type         Engine Type
    -------------------              -------------         -----------

N364NW .........................    Airbus A320-212         CFM56-5A3
N365NW .........................    Airbus A320-212         CFM56-5A3
N366NW .........................    Airbus A320-212         CFM56-5A3
N367NW .........................    Airbus A320-212         CFM56-5A3
N368NW .........................    Airbus A320-212         CFM56-5A3
N369NW .........................    Airbus A320-212         CFM56-5A3
N370NW .........................    Airbus A320-212         CFM56-5A3
N301NB .........................    Airbus A319-113         CFM56-5A4
N302NB .........................    Airbus A319-113         CFM56-5A4
N303NB .........................    Airbus A319-113         CFM56-5A4
N304NB .........................    Airbus A319-113         CFM56-5A4
N305NB .........................    Airbus A319-113         CFM56-5A4
<PAGE>
                                                                               4


    Registration Number              Aircraft Type         Engine Type
    -------------------              -------------         -----------

N306NB..........................    Airbus A319-113         CFM56-5A4
N307NB..........................    Airbus A319-113         CFM56-5A4
N308NB..........................    Airbus A319-113         CFM56-5A4
N309NB..........................    Airbus A319-113         CFM56-5A4
N310NB..........................    Airbus A319-113         CFM56-5A4
N311NB..........................    Airbus A319-113         CFM56-5A4
N312NB..........................    Airbus A319-113         CFM56-5A4
N313NB..........................    Airbus A319-113         CFM56-5A4
N314NB..........................    Airbus A319-113         CFM56-5A4

            (i) At the Escrow Agent's request under the Escrow Agreement, the
      Trustee shall affix the corresponding Escrow Receipt to each Series
      1999-2B Certificate. In any event, any transfer or exchange of any Series
      1999-2B Certificate shall also effect a transfer or exchange of the
      related Escrow Receipt. Prior to the Final Withdrawal Date, no transfer or
      exchange of any Series 1999-2B Certificate shall be permitted unless the
      corresponding Escrow Receipt is attached thereto and also is so
      transferred or exchanged. By acceptance of any Series 1999-2B Certificate
      to which an Escrow Receipt is attached, each Certificateholder of such a
      Series 1999-2B Certificate acknowledges and accepts the restrictions on
      transfer of the Escrow Receipt set forth herein and in the Escrow
      Agreement.

            Section 1.02. Intercreditor Agreement. The Series 1999-2B
Certificates are subject to the Intercreditor Agreement, the Deposit Agreement
and the Escrow Agreement.

            Section 1.03. Ranking of Series 1999-2B Certificates. The Series
1999-2B Certificates will be subject to the ranking and priority as set forth in
the Intercreditor Agreement.

            Section 1.04. Liquidity Facility. Payments of interest on the Series
1999-2B Certificates will be supported by a Liquidity Facility to be provided by
the Liquidity Provider for the benefit of the Certificateholders.

            Section 1.05. Ranking of Equipment Notes. The Equipment Notes will
be subject to the ranking and priority as set forth in the related Indenture.

            Section 1.06. No Cross-Default or Cross- Collateralization of
Equipment Notes. As set forth in the related Indenture, there will not be any
cross-collateralization provisions or cross-default provisions in respect of the
Equipment Notes.

                                   ARTICLE II
                             PREDELIVERY FUNDING AND
                               STATEMENT OF INTENT

<PAGE>
                                                                               5


            Section 2.01. Predelivery Funding. On the date hereof, the proceeds
from the issuance of the Applicable Certificates will be deposited in the
Deposit Accounts on behalf of the Escrow Agent. Pursuant to the terms of the
Deposit Agreement and the Note Purchase Agreement, a portion of the proceeds
from the issuance of the Applicable Certificates will be withdrawn from the
Deposit Account on any date on which an Owner Trustee (in the case of a Leased
Aircraft) or the Company (in the case of an Owned Aircraft) issues Equipment
Notes with respect to an Aircraft.

            Section 2.02. Statement of Intent. The parties hereto intend that
the Applicable Trust be classified for U.S. federal income tax purposes as a
grantor trust under Subpart E, Part I of Subchapter J of the Code and not as a
trust or association taxable as a corporation or a partnership. Each of the
parties hereto and each Applicable Certificateholder, or beneficial owner of an
Applicable Certificate, by its acceptance of its Applicable Certificate or a
beneficial interest therein, agrees to treat for all U.S. federal, state and
local income tax purposes (i) the Applicable Trust as a grantor trust and (ii)
Equipment Notes to be issued (or assumed) by an Owner Trust (in the case of a
Leased Aircraft) as indebtedness of such Owner Trust, and Equipment Notes issued
by the Company (in the case of an Owned Aircraft) as indebtedness of the
Company.

                                   ARTICLE III

                                   DEFINITIONS

            Section 3.01. Definitions. (a) For all purposes of the Basic
Agreement as supplemented by this Trust Supplement, the following capitalized
terms have the following meanings:

            Aircraft: Means the seven new Airbus A320 aircraft and fourteen new
      Airbus A319 aircraft which were sold or are expected to be sold to the
      Owner Trustee or the Company during the period from March 1999 through
      February 2000.

            Applicable Certificateholder: Means the holder of an Applicable
      Certificate.

            Class D Certificateholder: Means the holder of a Class D
      Certificate.

            Class D Certificates: Has the meaning assigned in the Intercreditor
      Agreement.

            Clearing Agency: Has the meaning specified in Section 1.01(e)
      hereof.

            Clearing Agency Participant: Means any of the participants in the
      Clearing Agency.

            Closing Notice: Has the meaning specified in the Note Purchase
      Agreement.

            Cut-off Date: Has the meaning specified in Section 1.01(b).

<PAGE>
                                                                               6


            Deposit Account: Means an account established under Section 1.2 of
      the Deposit Agreement.

            Deposit Agreement: Means the Deposit Agreement dated as of June 25,
      1999 relating to the Applicable Certificates between the Depositary and
      the Escrow Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            Deposit Make-Whole Amount: Has the meaning specified in the Note
      Purchase Agreement.

            Depositary: Means ABN AMRO Bank N.V., Chicago Branch.

            Deposits: Has the meaning specified in the Note Purchase Agreement.

            Distribution Date: Means any Regular Distribution Date or Special
      Distribution Date.

            Escrow Agent: Means initially, First Security Bank, National
      Association, and any replacement or successor therefor appointed in
      accordance with the Escrow Agreement.

            Escrow Agreement: Means the Escrow and Paying Agent Agreement dated
      as of June 25, 1999 relating to the Applicable Certificates, among the
      Escrow Agent, the Paying Agent, the Trustee and the Underwriters, as the
      same may be amended, supplemented or otherwise modified from time to time
      in accordance with its terms.

            Escrow Receipt: Means the receipt substantially in the form annexed
      to the Escrow Agreement representing a fractional undivided interest in
      the funds held in the Paying Agent Account (as defined in the Escrow
      Agreement)..

            Final Withdrawal: With respect to the Escrow Agreement, has the
      meaning set forth in Section 1.2 thereof.

            Final Withdrawal Date: Means the date on which the Final Withdrawal
      occurs.

            Intercreditor Agreement: Means the Intercreditor Agreement, dated as
      of the date hereof, by and among the Trustee, the Other Trustees, the
      Liquidity Providers named therein and State Street Bank and Trust Company,
      as Subordination Agent.

            Leased Aircraft: Has the meaning specified in the recitals hereto.

            Liquidity Facility: Has the meaning specified in the Note Purchase
      Agreement.

            Note Documents: With respect to any Equipment Note, means the Note
      Purchase Agreement, the related Indenture, the related Participation
      Agreement, and, if the related Aircraft is leased to the Company, the
      related Lease.

<PAGE>
                                                                               7


            Note Purchase Agreement: Means the Note Purchase Agreement, dated as
      of the date hereof, among the Company, the Trustee, the Other Trustees,
      State Street Bank and Trust Company, as Subordination Agent, the Escrow
      Agent and the Paying Agent.

            Notice of Purchase Withdrawal: Has the meaning specified in the Note
      Purchase Agreement.

            Other Agreements: Means the Basic Agreement as supplemented by Trust
      Supplement No. 1999-2A (the "1999-2A Trust Supplement") dated the date
      hereof relating to Northwest Airlines 1999-2A Pass Through Trust and by
      Trust Supplement No. 1999-2C (the "1999-2C Trust Supplement") dated the
      date hereof relating to the Northwest Airlines 1999-2C Pass Through Trust.

            Other Trustees: Means the trustee under the Other Agreements, and
      any successor or other trustee appointed as provided therein.

            Owned Aircraft: Has the meaning specified in the recitals hereto.

            Participation Agreement: Has the meaning specified in the Note
      Purchase Agreement.

            Paying Agent: Means State Street Bank and Trust Company.

            Pool Balance: Means, as of any date, (i) the original aggregate face
      amount of the Applicable Certificates less (ii) the aggregate amount of
      all payments made in respect of such Applicable Certificates or in respect
      of Deposits relating to the Applicable Trust other than payments made in
      respect of interest or premium thereon or reimbursement of any costs or
      expenses incurred in connection therewith. The Pool Balance as of any
      Distribution Date will be computed after giving effect to any special
      distribution with respect to unused Deposits, payment of principal of the
      Equipment Notes or payment with respect to other Trust Property and the
      distribution thereof to be made on that date.

            Prospectus Supplement: Means the Prospectus Supplement dated June
      18, 1999, relating to the offering of the Class A Certificates, the Class
      B Certificates and the Class C Certificates (each as defined in the
      Intercreditor Agreement).

            Pool Factor: Means, as of any Distribution Date, the quotient
      (rounded to the seventh decimal place) computed by dividing (i) the Pool
      Balance by (ii) the original aggregate face amount of the Applicable
      Certificates. The Pool Factor as of any Distribution Date shall be
      computed after giving effect to any special distribution with respect to
      unused Deposits, payment of principal of the Equipment Notes or other
      Trust Property and the distribution thereof to be made on that date.

            Record Date: Means the date preceding any Distribution Date on which
      the Applicable Certificateholders are determined for purposes of the
      distribution which will occur on such Distribution Date.

<PAGE>
                                                                               8


            Scheduled Closing Date: Has the meaning specified in the Note
      Purchase Agreement.

            Special Payment: Means any payment (other than a Scheduled Payment)
      in respect of, or any proceeds of, any Equipment Note.

            Special Redemption Premium: Means the Deposit Make-Whole Amount
      payable by the Company in respect of the Final Withdrawal pursuant to the
      Note Purchase Agreement.

            Trust Property: Means (i) the Equipment Notes held as the property
      of the Trust and, subject to the Intercreditor Agreement, all monies at
      any time paid thereon and all monies due and to become due thereunder,
      (ii) the rights of the Trust under the Escrow Agreement to request the
      Escrow Agent to withdraw from the Deposit Accounts funds sufficient to
      enable the Trust to purchase Equipment Notes on the delivery of an
      Aircraft, (iii) funds from time to time deposited in the Certificate
      Account and the Special Payments Account, and (iv) all rights of the Trust
      and the Trustee, on behalf of the Trust, under the Intercreditor
      Agreement, the Note Purchase Agreement and the Liquidity Facility,
      including, without limitation, all rights to receive certain payments
      thereunder, and all monies paid to the Trustee on behalf of the Trust
      pursuant to the Intercreditor Agreement or the Liquidity Facility.

            Trusts: Means, collectively, the Northwest Airlines 1999 Pass
      Through Trusts to be formed pursuant to the Basic Agreement, as
      supplemented by this Trust Supplement and the Other Agreements.

            Underwriters: Means the several Underwriters named in and who are
      parties to the Underwriting Agreement.

            Underwriting Agreement: Means the Underwriting Agreement dated as of
      June 18, 1999 by and among the Company, the Guarantor, Salomon Smith
      Barney Inc., Credit Suisse First Boston Corporation, ABN AMRO
      Incorporated, Credit Lyonnais Securities (USA) Inc. and Deutsche Bank
      Securities Inc.

                                   ARTICLE IV
                                   THE TRUSTEE

            Section 4.01. Delivery of Documents; Delivery Dates. (a) The Trustee
is hereby directed (i) to execute and deliver the Intercreditor Agreement, the
Escrow Agreement and the Note Purchase Agreement, each in the form delivered to
the Trustee by the Company and (ii) subject to the respective terms thereof, to
perform its obligations thereunder. Upon request of the Company and the
satisfaction or waiver of the closing conditions specified in the Underwriting
Agreement, the Trustee shall execute, deliver, authenticate, issue and sell
Applicable Certificates in authorized denominations equaling in the aggregate
the amount set forth, with respect to the Applicable Trust, in Schedule I to the
Underwriting Agreement evidencing the entire ownership interest in the Trust,
which amount equals the maximum

<PAGE>
                                                                               9


aggregate principal amount of Equipment Notes which may be purchased by the
Trustee pursuant to the Note Purchase Agreement. Except as provided in Sections
3.03, 3.04, 3.05 and 3.09 of the Basic Agreement, the Trustee shall not execute,
authenticate or deliver Applicable Certificates in excess of the aggregate
amount specified in this paragraph.

            (b) On or after the Issuance Date the Company may deliver from time
to time to the Trustee a Closing Notice relating to one or more Equipment Notes.
After receipt of a Closing Notice and in any case no later than two Business
Days prior to a Scheduled Closing Date as to which such Closing Notice relates
(the "Applicable Delivery Date"), the Trustee shall (as and when specified in
the Closing Notice) instruct the Escrow Agent to provide a Notice of Purchase
Withdrawal to the Depositary requesting (A) the withdrawal of one or more
Deposits on the Applicable Delivery Date in accordance with and to the extent
permitted by the terms of the Escrow Agreement and the Deposit Agreement and (B)
the payment of all, or a portion, of such Deposit or Deposits in an amount equal
in the aggregate to the purchase price of such Equipment Notes to or on behalf
of the Owner Trustee or the Company, as the case may be, issuing such Equipment
Notes, all as shall be described in the Closing Notice. The Trustee shall (as
and when specified in such Closing Notice), subject to the conditions set forth
in Section 3 of the Note Purchase Agreement, enter into and perform its
obligations under the Participation Agreement specified in such Closing Notice
(the "Applicable Participation Agreement") and cause such certificates,
documents and legal opinions relating to the Trustee to be duly delivered as
required by the Applicable Participation Agreement. If at any time prior to the
Applicable Delivery Date, the Trustee receives a notice of postponement pursuant
to Section 2(e) or 2(f) of the Note Purchase Agreement, then the Trustee shall
give the Depositary (with a copy to the Escrow Agent) a notice of cancellation
of such Notice of Purchase Withdrawal relating to such Deposit or Deposits on
such Applicable Delivery Date. Upon satisfaction of the conditions specified in
the Note Purchase Agreement and the Applicable Participation Agreement, the
Trustee shall purchase the applicable Equipment Notes with the proceeds of the
withdrawals of one or more Deposits made on the Applicable Delivery Date in
accordance with the terms of the Deposit Agreement and the Escrow Agreement. The
purchase price of such Equipment Notes shall equal the principal amount of such
Equipment Notes. Amounts withdrawn from such Deposit or Deposits in excess of
the purchase price of the Equipment Notes or to the extent not applied on the
Applicable Delivery Date to the purchase price of the Equipment Notes, shall be
re-deposited by the Trustee with the Depositary on the Applicable Delivery Date
in accordance with the terms of the Deposit Agreement.

            Section 4.02. Withdrawal of Deposits. If any Deposits remain
outstanding on the Business Day next succeeding the Cut-off Date, (i) the
Trustee shall give the Escrow Agent notice that the Trustee's obligation to
purchase Equipment Notes under the Note Purchase Agreement has terminated and
instruct the Escrow Agent to provide a notice of Final Withdrawal to the
Depositary substantially in the form of Exhibit B to the Deposit Agreement (the
"Final Withdrawal Notice") and (ii) the Trustee will make a demand upon the
Company for an amount equal to the Special Redemption Premium, such payment to
be made on the Final Withdrawal Date.

            Section 4.03. The Trustee. (a) Subject to Section 4.04 of this Trust
Supplement and Section 7.14 of the Basic Agreement, the Trustee shall not be
responsible in any manner whatsoever for or in respect of the validity or
sufficiency of this Trust Supplement, the Deposit

<PAGE>
                                                                              10


Agreement or the Escrow Agreement or the due execution hereof or thereof by the
Company or the other parties thereto (other than the Trustee), or for or in
respect of the recitals and statements contained herein or therein, all of which
recitals and statements are made solely by the Company.

            (b) Except as herein otherwise provided, no duties, responsibilities
or liabilities are assumed, or shall be construed to be assumed by the Trustee
by reason of this Trust Supplement other than as set forth in the Basic
Agreement, and this Trust Supplement is executed and accepted on behalf of the
Trustee, subject to all the terms and conditions set forth in the Basic
Agreement, upon the effectiveness thereof, as fully to all intents as if the
same were herein set forth at length.

            Section 4.04. Representations and Warranties of the Trustee. The
Trustee hereby represents and warrants that:

                  (a) the Trustee has full power, authority and legal right to
            execute, deliver and perform this Trust Supplement, the
            Intercreditor Agreement, the Escrow Agreement and the Note Documents
            to which it is a party and has taken all necessary action to
            authorize the execution, delivery and performance by it of this
            Trust Supplement, the Intercreditor Agreement, the Escrow Agreement
            and the Note Documents to which it is a party;

                  (b) the execution, delivery and performance by the Trustee of
            this Trust Supplement, the Intercreditor Agreement, the Escrow
            Agreement and the Note Documents to which it is a party (i) will not
            violate any provision of any United States federal law or the law of
            the state of the United States where it is located governing the
            banking and trust powers of the Trustee or any order, writ,
            judgment, or decree of any court, arbitrator or governmental
            authority applicable to the Trustee or any of its assets, (ii) will
            not violate any provision of the articles of association or by-laws
            of the Trustee, and (iii) will not violate any provision of, or
            constitute, with or without notice or lapse of time, a default
            under, or result in the creation or imposition of any lien on any
            properties included in the Trust Property pursuant to the provisions
            of any mortgage, indenture, contract, agreement or other undertaking
            to which it is a party, which violation, default or lien could
            reasonably be expected to have an adverse effect on the Trustee's
            performance or ability to perform its duties hereunder or thereunder
            or on the transactions contemplated herein or therein;

                  (c) the execution, delivery and performance by the Trustee of
            this Trust Supplement, the Intercreditor Agreement, the Escrow
            Agreement and the Note Documents to which it is a party will not
            require the authorization, consent, or approval of, the giving of
            notice to, the filing or registration with, or the taking of any
            other action in respect of, any governmental authority or agency of
            the United States or the state of the United States where it is
            located regulating the banking and corporate trust activities of the
            Trustee; and

                  (d) this Trust Supplement, the Intercreditor Agreement, the
            Escrow Agreement and the Note Documents to which it is a party have
            been, or will be, as

<PAGE>
                                                                              11


            applicable, duly executed and delivered by the Trustee and
            constitute, or will constitute, as applicable, the legal, valid and
            binding agreements of the Trustee, enforceable against it in
            accordance with their respective terms; provided, however, that
            enforceability may be limited by (i) applicable bankruptcy,
            insolvency, reorganization, moratorium or similar laws affecting the
            rights of creditors generally and (ii) general principles of equity.

            Section 4.05. Trustee Liens. The Trustee in its individual capacity
agrees, in addition to the agreements contained in Section 7.16 of the Basic
Agreement, that it will, at its own cost and expense, promptly take any action
as may be necessary to duly discharge and satisfy in full any Trustee's liens on
or with respect to the Trust Property which is attributable to the Trustee in
its individual capacity and which is unrelated to the transactions contemplated
by the Intercreditor Agreement or the Note Purchase Agreement.

                                    ARTICLE V
                             SUPPLEMENTAL AGREEMENT

            Section 5.01. Supplemental Agreements Without Consent of
Certificateholders.

            (a) Under the terms of, and subject to the limitations contained in,
Section 9.01 of the Basic Agreement, the Company may (but will not be required
to), and the Trustee (subject to Section 9.03 of the Basic Agreement) shall, at
the Company's request, at any time and from time to time, enter into one or more
agreements supplemental to the Escrow Agreement, the Note Purchase Agreement or
the Deposit Agreement, for any of the purposes set forth in clauses (1) through
(7) of such Section 9.01, except that (a) clause (3) of such Section 9.01 shall
be deemed to include the Company's rights and powers conferred by the Note
Purchase Agreement and (b) clause (4) of such Section 9.01 shall be deemed to
include corrections or supplements to provisions of the Escrow Agreement or the
Deposit Agreement which may be defective or inconsistent with any other
provision of this Agreement or contained in any agreement referred to in such
clause (4) and the curing of any ambiguity or the modification of any other
provision with respect to matters or questions arising under the Escrow
Agreement or the Deposit Agreement.

            (b) If Class D Certificates are issued, the Company, the Guarantor
and the Trustee, without the consent of the Applicable Certificateholders, may
enter into an agreement supplemental to this Trust Supplement whereby Class D
Certificateholders shall be granted purchase rights similar to those set forth
in Section 7.01 hereof.

            (c) Any supplemental agreement entered into pursuant to Sections
5.01(a) and (b) may not adversely affect the status of the Trust for U.S.
federal income tax purposes, as either (i) a grantor trust under Subpart E, Part
I of Subchapter J of Chapter 1 of Subtitle A of the Code or (ii) a partnership.

            Section 5.02. Supplement Agreements with Consent of
Certificateholders. The provisions of Section 9.02 of the Basic Agreement shall
apply to agreements or amendments for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of the Escrow
Agreement, the Deposit Agreement or the Note Purchase Agreement to the extent
applicable to the Certificateholders approving such agreement or amendment or

<PAGE>
                                                                              12


modifying in any manner the rights and obligations of such Certificateholders
under the Escrow Agreement, the Deposit Agreement or the Note Purchase
Agreement; provided that the provisions of Section 9.02(1) of the Basic
Agreement shall be deemed to include reductions in any manner of, or delay in
the timing of, any receipt by the Certificateholders of payments upon the
Deposits.

                                   ARTICLE VI
                 DISTRIBUTIONS; STATEMENT TO CERTIFICATEHOLDERS

            Section 6.01. Additions to Article IV of the Basic Agreement. In
addition to the provisions of Article IV of the Basic Agreement, the following
provisions shall apply to the Trust:

            (a) Upon the payment of Special Redemption Premium to the Trustee
      under the Note Purchase Agreement, the Trustee, upon receipt thereof,
      shall immediately deposit the aggregate amount of such Special Redemption
      Premium in the Special Payments account;

            (b) The distribution of amounts of Special Redemption Premium as
      provided for in Section 4.02(b) of the Basic Agreement shall be on the
      Special Distribution Date with respect to such Special Payment or as soon
      thereafter as the Trustee has confirmed receipt of the related Special
      Redemption Premium;

            (c) In the event of the payment of a Special Redemption Premium by
      the Company to the Trustee under the Note Purchase Agreement, the notice
      provided for in Section 4.02(c) of the Basic Agreement shall be mailed,
      together with the notice by the Paying Agent under Section 2.6 of the
      Escrow Agreement, not less that 15 days prior to the Special Distribution
      Date for such amount, which Special Distribution Date shall be the Final
      Withdrawal Date: and

            (d) The last sentence of the first paragraph of Section 4.02(c) of
      the Basic Agreement shall apply equally if the amount of Special
      Redemption Premium, if any, has not been calculated at the time the
      Trustee mails notice of a Special Payment.

            Section 6.02. Statements to Applicable Certificateholders; Federal
Income Tax Reporting. (a) On each Distribution Date, the Trustee will include
with each distribution to Applicable Certificateholders of a Scheduled Payment
or Special Payment, as the case may be, a statement setting forth the
information provided below (in the case of a Special Payment, including any
Special Redemption Premium, reflecting in part the information provided by the
Paying Agent under the Escrow Agreement). Such statement shall set forth (per
$1,000 face amount Applicable Certificate as to (ii), (iii), (iv) and (v) below)
the following information:

            (i) the aggregate amount of funds distributed on such Distribution
      Date under the Agreement and under the Escrow Agreement, indicating the
      amount allocable to each source;

<PAGE>
                                                                              13


            (ii) the amount of such distribution under the Agreement allocable
      to principal and the amount allocable to premium (including the Special
      Redemption Premium), if any;

            (iii) the amount of such distribution under the Agreement allocable
      to interest;

            (iv) the amount of such distribution under the Escrow Agreement
      allocable to interest;

            (v) the amount of such distribution under the Escrow Agreement
      allocable to Deposits; and

            (vi) the Pool Balance and the Pool Factor.

            With respect to the Applicable Certificates registered in the name
of a Clearing Agency, on the Record Date prior to each Distribution Date, the
Trustee will request from such Clearing Agency a securities position listing
setting forth the names of all Clearing Agency Participants reflected on such
Clearing Agency's books as holding interests in the Applicable Certificates on
such Record Date. On each Distribution Date, the Trustee will mail to each such
Clearing Agency Participant the statement described above and will make
available additional copies as requested by such Clearing Agency Participant for
forwarding to holders of interests in the Applicable Certificates.

            (b) Within a reasonable period of time after the end of each
calendar year but not later than the latest date permitted by law, the Trustee
shall furnish to each Person who at any time during such calendar year was an
Applicable Certificateholder of record a statement containing the sum of the
amounts determined pursuant to clauses (a)(i), (a)(ii), (a)(iii), (a)(iv) and
(a)(v) above for such calendar year or, in the event such Person was an
Applicable Certificateholder of record during a portion of such calendar year,
for such portion of such year, and such other items as are readily available to
the Trustee and which an Applicable Certificateholder shall reasonably request
as necessary for the purpose of such Applicable Certificateholder's preparation
of its federal income tax returns. Such statement and such other items shall be
prepared on the basis of information supplied to the Trustee by the Clearing
Agency Participants and shall be delivered by the Trustee to such Clearing
Agency Participants to be available for forwarding by such Clearing Agency
Participants to the holders of interests in the Applicable Certificates in the
manner described in Section 6.02(a) hereof.

            (c) Promptly following (i) the Cut-off Date, if there has been any
change in the information set forth in clauses (x) and (y) below from that set
forth in page S-37 of the Prospectus Supplement, and (ii) any early redemption
or purchase of, or any default in the payment of principal or interest in
respect of, any of the Equipment Notes held in the Applicable Trust, or any
Final Withdrawal, the Trustee shall furnish to Applicable Certificateholders of
record on such date a statement setting forth (x) the expected Pool Factors for
each subsequent Regular Distribution Date following the Cut-off Date and (y) the
expected principal distribution schedule of the Equipment Notes, in the
aggregate, held as Trust Property at the date of such notice. With respect to
the Applicable Certificates registered in the name of a Clearing Agency, on the
Cut-off Date, the Trustee will request from such Clearing Agency a securities
position

<PAGE>
                                                                              14


listing setting forth the names of all Clearing Agency Participants reflected on
such Clearing Agency's books as holding interests in the Applicable Certificates
on such date. The Trustee will mail to each such Clearing Agency Participant the
statement described above and will make available additional copies as requested
by such Clearing Agency Participant for forwarding to holders of interests in
the Applicable Certificates.

            (d) Unless and until required otherwise by applicable authority, the
Trustee shall treat the Trust as a "grantor trust" under Subpart E, Part I,
Subchapter J of Chapter 1 of the Code, and shall file annually with the Internal
Revenue Service Form 1041, indicating the name and address of the Trust and
otherwise completed in blank, with attached statements identifying each
Certificateholder and its pro rata share of the income and expenses of the Trust
for the applicable portion of the preceding calendar year, on the cash or
accrual method, as the case may be, and shall furnish each Certificateholder
with a copy of its statement at the time and in the manner required by the Code.

            (e) This Section 6.02 supersedes and replaces Section 4.03 of the
Basic Agreement.

                                   ARTICLE VII
                                     DEFAULT

            Section 7.01. Purchase Rights of Certificateholders. (a) At any time
after the occurrence and during the continuance of a Triggering Event, each
Applicable Certificateholder shall have the right to purchase, for the purchase
price set forth in Section 7.01 of the Other Agreement relating to the Class A
Certificates, all, but not less than all, of the Class A Certificates upon ten
days' written notice to the Class A Trustee and each other Applicable
Certificateholder, provided that (i) if prior to the end of such ten-day period
any other Applicable Certificateholder notifies such purchasing Applicable
Certificateholder that such other Applicable Certificateholder wants to
participate in such purchase, then such other Applicable Certificateholder may
join with the purchasing Applicable Certificateholder to purchase all, but not
less than all, of the Class A Certificates pro rata based on the Fractional
Undivided Interest in the Applicable Trust held by each such Applicable
Certificateholder and (ii) if prior to the end of such ten-day period any other
Applicable Certificateholder fails to notify the purchasing Applicable
Certificateholder of such other Applicable Certificateholder's desire to
participate in such a purchase, then such other Applicable Certificateholder
shall lose its right to purchase the Class A Certificates pursuant to this
Section 7.01(a).

            (b) By acceptance of its Applicable Certificate, each Applicable
Certificateholder agrees that at any time after the occurrence and during the
continuation of a Triggering Event, each Class C Certificateholder shall have
the right to purchase all, but not less than all, of the Class A Certificates
and the Applicable Certificates upon ten days' written notice to the Class A
Trustee, the Trustee and each other Class C Certificateholder, provided that (A)
if prior to the end of such ten-day period any other Class C Certificateholder
notifies such purchasing Class C Certificateholder that such other Class C
Certificateholder wants to participate in such purchase, then such other Class C
Certificateholder may join with the purchasing Class C Certificateholder to
purchase all, but not less than all, of the Class A

<PAGE>
                                                                              15


Certificates and the Applicable Certificates pro rata based on the fractional
undivided interest in the Class C Trust held by each such Class C
Certificateholder and (B) if prior to the end of such ten-day period any other
Class C Certificateholder fails to notify the purchasing Class C
Certificateholder of such other Class C Certificateholder's desire to
participate in such a purchase, then such other Class C Certificateholder shall
lose its right to purchase the Applicable Certificates pursuant to this Section
7.01(b).

            The purchase price with respect to the Applicable Certificates shall
be equal to the Pool Balance of the Applicable Certificates, together with
accrued and unpaid interest thereon to the date of such purchase, without
premium, but including any other amounts then due and payable to the Applicable
Certificateholders under this Agreement, the Intercreditor Agreement, the Escrow
Agreement or any Note Document or on or in respect of the Applicable
Certificates; provided, however, that (i) if such purchase occurs after the
record date specified in Section 2.3(b) of the Escrow Agreement relating to the
distribution of unused Deposits and accrued and unpaid interest thereunder, such
purchase price shall be reduced by the aggregate amount of unused Deposits and
interest to be distributed under the Escrow Agreement (which deducted amounts
shall remain distributable to, and may be retained by, the Applicable
Certificateholder as of such record date) and (ii) if such purchase occurs after
a Record Date, such purchase price shall be reduced by the amount to be
distributed hereunder on the related Distribution Date (which deducted amounts
shall remain distributable to, and may be retained by, the Applicable
Certificateholder as of such Record Date); provided further that no such
purchase of Applicable Certificates shall be effective unless the purchaser(s)
shall certify to the Trustee that contemporaneously with such purchase, such
purchaser(s) is purchasing, pursuant to the terms of this Agreement and the
Other Agreements, the Class A Certificates and the Applicable Certificates which
are senior to the securities held by such purchaser(s). Each payment of the
purchase price of the Applicable Certificates referred to in the first sentence
hereof shall be made to an account or accounts designated by the Trustee and
each such purchase shall be subject to the terms of this Section 7.01. Each
Applicable Certificateholder agrees by its acceptance of its Applicable
Certificate that it will, subject to Section 3.04 of the Basic Agreement, upon
payment from such Class C Certificateholder(s) of the purchase price set forth
in the first sentence of this paragraph, forthwith sell, assign, transfer and
convey to the purchaser(s) thereof (without recourse, representation or warranty
of any kind except for its own acts), all of the right, title, interest and
obligation of such Applicable Certificateholder in this Agreement, the Escrow
Agreement, the Deposit Agreement, the Intercreditor Agreement, the Liquidity
Facility, the Note Documents and all Applicable Certificates and Escrow Receipts
held by such Applicable Certificateholder (excluding all right, title and
interest under any of the foregoing to the extent such right, title or interest
is with respect to an obligation not then due and payable as respects any action
or inaction or state of affairs occurring prior to such sale) and the purchaser
shall assume all of such Applicable Certificateholder's obligations under this
Agreement, the Escrow Agreement, the Deposit Agreement, the Intercreditor
Agreement, the Liquidity Facility, the Note Documents and all such Applicable
Certificates and Escrow Receipts. The Applicable Certificates will be deemed to
be purchased on the date payment of the purchase price is made notwithstanding
the failure of the Applicable Certificateholders to deliver any Applicable
Certificates and, upon such a purchase, (i) the only rights of the Applicable
Certificateholders will be to deliver the Applicable Certificates to the
purchaser(s) and receive the purchase price for such Applicable Certificates and
(ii) if the purchaser(s) shall so request, such Applicable Certificateholder
will comply with all the provisions of Section 3.04 of the Basic Agreement to

<PAGE>
                                                                              16


enable new Applicable Certificates to be issued to the purchaser in such
denominations as it shall request. All charges and expenses in connection with
the issuance of any such new Applicable Certificates shall be borne by the
purchaser thereof.

            (c) As used in this Section 7.01, the terms "Class A
Certificateholder", "Class A Certificate", "Class A Trustee", "Class C
Certificateholder", "Class C Trust", "Class C Certificate" and "Class C Trustee"
shall have the respective meanings assigned to such terms in the Intercreditor
Agreement.

            (d) This Section 7.01 supersedes and replaces Section 6.01(b) of the
Basic Agreement.

                                  ARTICLE VIII
                            MISCELLANEOUS PROVISIONS

            Section 8.01. Basic Agreement Ratified. Except and so far as herein
expressly provided, all of the provisions, terms and conditions of the Basic
Agreement are in all respects ratified and confirmed; and the Basic Agreement
and this Trust Supplement shall be taken, read and construed as one and the same
instrument.

            Section 8.02. GOVERNING LAW. THIS TRUST SUPPLEMENT AND THE SERIES
1999-2B CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK.

            Section 8.03. Execution in Counterparts. This Trust Supplement may
be executed in any number of counterparts, each of which shall be an original,
but such counterparts shall together constitute but one and the same instrument.

<PAGE>
                                                                              17


            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:

<PAGE>

            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By: /s/ Donald E. Smith
                                          ---------------------------------
                                          Name: DONALD E. SMITH
                                          Title: VICE PRESIDENT
<PAGE>

                                    EXHIBIT A

                               FORM OF CERTIFICATE

            Unless this certificate is presented by an authorized representative
of The Depository Trust Company, a New York corporation ("DTC"), to Issuer or
its agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co. or in such other name as is
requested by an authorized representative of DTC (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch the registered owner hereof,
Cede & Co., has an interest herein.

            Any person acquiring this Certificate by its acceptance hereof or
its interest herein, will be deemed to represent and warrant to and for the
benefit of each Owner Participant and the Company that either (i) the assets of
an employee benefit plan subject to Title I of the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"), or of a plan subject to Section 4975
of the Internal Revenue Code of 1986, as amended (the "Code") or of entities
which may be deemed to hold such plans, have not been used to purchase this
Certificate or (ii) one or more prohibited transaction statutory or
administrative exemptions applies such that the use of such plan assets to
purchase and hold this Certificate will not constitute a non-exempt prohibited
transaction under ERISA or Section 4975 of the Code.

                  NORTHWEST AIRLINES 1999-2B PASS THROUGH TRUST

                                  Pass Through
                           Certificate, Series 1999-2B

                          Issuance Date: June 25, 1999

                Final Legal Distribution Date: September 1, 2016

      Evidencing A Fractional undivided interest In the Northwest Airlines
      1999-2B Pass Through Trust, The Property Of Which Includes Certain
      Equipment Notes Each Secured By An Aircraft Leased To Or Owned By
      Northwest Airlines, Inc.

Certificate
No. _____         $________ Fractional undivided interest representing 0.__% of
                  the Trust per $1,000 of Reference Principal Amount

            THIS CERTIFIES THAT _______________, for value received, is the
registered owner of a Fractional Undivided Interest in the amount of $_______
(the "Reference Principal Amount") in the Northwest Airlines 1999-2B Pass
Through Trust (the "Trust") created by State Street Bank and Trust Company of
Connecticut, National Association, as trustee (the "Trustee"), pursuant to a
Pass Through Trust Agreement, dated as of June 3, 1999 (as amended or

<PAGE>
                                                                               2


supplemented, the "Basic Agreement"), by and among the Trustee, Northwest
Airlines Corporation, a Delaware corporation (the "Guarantor"), and Northwest
Airlines, Inc., a Minnesota corporation (the "Company"), as supplemented by
Trust Supplement No. 1999-2B thereto, dated as of June 25, 1999 (collectively,
the "Agreement"), by and among the Trustee, the Guarantor and the Company, a
summary of certain of the pertinent provisions of which is set forth below. To
the extent not otherwise defined herein, the capitalized terms used herein have
the meanings assigned to them in the Agreement. This Certificate is one of the
duly authorized Certificates designated as "Pass Through Certificates, Series
1999-2B" (herein called the "Certificates"). This Certificate is issued under
and is subject to the terms, provisions and conditions of the Agreement and the
Intercreditor Agreement, to which Agreement the Certificateholder of this
Certificate by virtue of the acceptance hereof assents and by which such
Certificateholder is bound. The property of the Trust includes certain Equipment
Notes and all rights of the Trust to receive payments under the Intercreditor
Agreement and the Liquidity Facility (the "Trust Property"). Each issue of the
Equipment Notes is secured by a security interest in the Aircraft leased to or
owned by the Company.

            Each of the Certificates represents a Fractional Undivided Interest
in the Trust and the Trust Property and has no rights, benefits or interest in
respect of any other separate trust established pursuant to the terms of the
Basic Agreement for any other series of certificates issued pursuant thereto.

            Subject to and in accordance with the terms of the Agreement and the
Intercreditor Agreement, from funds then available to the Trustee, there will be
distributed on each March 1 and September 1 (a "Regular Distribution Date"),
commencing March 1, 2000 to the Person in whose name this Certificate is
registered at the close of business on the 15th day preceding the Regular
Distribution Date, an amount in respect of the Scheduled Payments on the
Equipment Notes due on such Regular Distribution Date, the receipt of which has
been confirmed by the Trustee, equal to the product of the percentage interest
in the Trust evidenced by this Certificate and an amount equal to the sum of
such Scheduled Payments. Subject to and in accordance with the terms of the
Agreement and the Intercreditor Agreement, in the event that Special Payments on
the Equipment Notes are received by the Trustee, from funds then available to
the Trustee, there shall be distributed on the applicable Special Distribution
Date, to the Person in whose name this Certificate is registered at the close of
business on the 15th day preceding the Special Distribution Date, an amount in
respect of such Special Payments on the Equipment Notes, the receipt of which
has been confirmed by the Trustee, equal to the product of the percentage
interest in the Trust evidenced by this Certificate and an amount equal to the
sum of such Special Payments so received. If a Regular Distribution Date or
Special Distribution Date is not a Business Day, distribution shall be made on
the immediately following Business Day with the same force and effect as if made
on such Regular Distribution Date or Special Distribution Date and no interest
shall accrue during the intervening period. The Trustee shall mail notice of
each Special Payment and the Special Distribution Date therefor to the
Certificateholder of this Certificate.

            Distributions on this Certificate will be made by the Trustee by
check mailed to the Person entitled thereto, without the presentation or
surrender of this Certificate or the making of any notation hereon, except that
with respect to Certificates registered on the Record Date in the name of a
Clearing Agency (or its nominee), such distribution shall be made by wire
transfer.

<PAGE>
                                                                               3


Except as otherwise provided in the Agreement and notwithstanding the above, the
final distribution on this Certificate will be made after notice mailed by the
Trustee of the pendency of such distribution and only upon presentation and
surrender of this Certificate at the office or agency of the Trustee specified
in such notice.

            The Certificates do not represent an obligation of, or an obligation
guaranteed by, or an interest in, the Guarantor, the Company or the Trustee or
any affiliate thereof. The Certificates are limited in right or payment, all as
more specifically set forth herein and in the Agreement. All payments or
distributions made to Certificateholders under the Agreement shall be made only
from the Trust Property and only to the extent that the Trustee shall have
sufficient income or proceeds from the Trust Property to make such payments in
accordance with the terms of the Agreement. Each Certificateholder of this
Certificate, by its acceptance hereof, agrees that it will look solely to the
income and proceeds from the Trust Property to the extent available for
distribution to such Certificateholder as provided in the Agreement. This
Certificate does not purport to summarize the Agreement and reference is made to
the Agreement for information with respect to the interests, rights, benefits,
obligations, proceeds, and duties evidenced hereby. A copy of the Agreement may
be examined during normal business hours at the principal office of the Trustee,
and at such other places, if any, designated by the Trustee, by any
Certificateholder upon request.

            The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Guarantor or the Company and the rights of the Certificateholders under the
Agreement at any time by the Guarantor, the Company and the Trustee with the
consent of the Certificateholders holding Certificates evidencing Fractional
Undivided Interests aggregating not less than a majority in interest in the
Trust. Any such consent by the Certificateholder of this Certificate shall be
conclusive and binding on such Certificateholder and upon all future
Certificateholders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange hereof or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Certificateholders of any of the Certificates.

            As provided in the Agreement and subject to certain limitations set
forth, the transfer of this Certificate is registrable in the Register upon
surrender of this Certificate for registration of transfer at the offices or
agencies maintained by the Trustee in its capacity as Registrar, or by any
successor Registrar, duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Registrar duly executed by
the Certificateholder hereof or such Certificateholder's attorney duly
authorized in writing, and thereupon one or more new Certificates of authorized
denominations evidencing the same aggregate Fractional Undivided Interest in the
Trust will be issued to the designated transferee or transferees.

            The Certificates are issuable only as registered Certificates
without coupons in minimum denominations of $1,000 Fractional Undivided
Interests and integral multiples thereof. As provided in the Agreement and
subject to certain limitations therein set forth, the Certificates are
exchangeable for new Certificates of authorized denominations evidencing the
same

<PAGE>
                                                                               4


aggregate Fractional Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.

            No service charge will be made for any such registration of transfer
or exchange, but the Trustee shall require payment of a sum sufficient to cover
any tax or governmental charge payable in connection therewith.

            Each Certificateholder or beneficial owner of a Certificate, by its
acceptance of this Certificate or a beneficial interest herein, agrees to treat
the Trust as a grantor trust for all U.S. federal, state and local income tax
purposes.

            The Trustee, the Registrar, and any agent of the Trustee or the
Registrar may treat the person in whose name this Certificate is registered as
the owner hereof for all purposes, and neither the Trustee, the Registrar, nor
any such agent shall be affected by any notice to the contrary.

            The obligations and responsibilities created by the Agreement and
the Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to
the Agreement and the disposition of all property held as part of the Trust
Property.

            THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

            Unless the certificate of authentication hereon has been executed by
the Trustee, by manual signature, this Certificate shall not be entitled to any
benefit under the Agreement or be valid for any purpose.

            IN WITNESS WHEREOF, the Trustee has caused this Certificate to be
duly executed.

                                      NORTHWEST AIRLINES 1999-2B
                                        PASS THROUGH TRUST

                                      By: STATE STREET BANK AND
                                            TRUST COMPANY OF
                                            CONNECTICUT, NATIONAL
                                            ASSOCIATION, as Trustee


                                           By: ________________________________
                                               Name:
                                               Title:

<PAGE>

               FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

      This is one of the Certificates referred to in the within-mentioned
Agreement.

STATE STREET BANK AND TRUST
COMPANY OF CONNECTICUT,
NATIONAL ASSOCIATION,
as Trustee


By: _______________________________
Name:
Title:

<PAGE>

                                    EXHIBIT B

                          DTC Letter of Representations

<PAGE>

                                    EXHIBIT C

                           REGULAR DISTRIBUTION DATES
                                       AND
                               SCHEDULED PAYMENTS

          Regular Distribution Date              Scheduled Payment
          -------------------------              -----------------

          March 1, 2000...............             $1,031,044.65
          September 1, 2000...........                582,354.22
          March 1, 2001...............                741,003.36
          September 1, 2001...........                247,411.80
          March 1, 2002...............              1,278,366.78
          September 1, 2002...........              1,322,714.67
          March 1, 2003...............              2,119,736.10
          September 1, 2003...........              1,541,656.05
          March 1, 2004...............              2,060,624.40
          September 1, 2004...........              1,226,372.85
          March 1, 2005...............              1,686,229.95
          September 1, 2005...........              1,226,372.85
          March 1, 2006...............              1,686,229.80
          September 1, 2006...........              1,226,372.85
          March 1, 2007...............              1,990,495.41
          September 1, 2007...........              1,226,372.85
          March 1, 2008...............              3,282,688.63
          September 1, 2008...........              1,226,372.85
          March 1, 2009...............              4,272,181.18
          September 1, 2009...........              1,629,492.45
          March 1, 2010...............              4,827,000.42
          September 1, 2010...........              1,629,492.45
          March 1, 2011...............              5,297,789.39
          September 1, 2011...........              1,568,029.03
          March 1, 2012...............             12,055,605.09
          September 1, 2012...........                      0.00
          March 1, 2013...............             25,914,611.99
          September 1, 2013...........                      0.00
          March 1, 2014...............             23,794,786.44
          September 1, 2014...........                      0.00
          March 1, 2015...............              3,166,591.49
          March 1, 2016...............                      0.00
          March 1, 2017...............                      0.00
          September 1, 2017...........                      0.00
          March 1, 2018...............                      0.00
          September 1, 2018...........                      0.00
          March 1, 2019...............                      0.00



                                                                  EXECUTION COPY

            This Trust Supplement No. 1999-2C, dated as of June 25, 1999 (herein
called the "Trust Supplement"), by and among Northwest Airlines Corporation, a
Delaware corporation (the "Guarantor"), Northwest Airlines, Inc., a Minnesota
corporation (the "Company"), and State Street Bank and Trust Company of
Connecticut, National Association (the "Trustee"), to the Pass Through Trust
Agreement, dated as of June 3, 1999, by and among the Guarantor, the Company and
the Trustee (the "Basic Agreement").

                              W I T N E S S E T H:

            WHEREAS, the Basic Agreement, unlimited as to the aggregate
principal amount of Certificates which may be issued thereunder, has heretofore
been executed and delivered;

            WHEREAS, unless otherwise specified herein, capitalized terms used
herein without definition having the respective meanings specified heretofore in
the Basic Agreement;

            WHEREAS, the Company intends to finance the acquisition of seven new
Airbus A320 aircraft and fourteen new Airbus A319 aircraft either (i) through
separate leveraged lease transactions, in which case the Company will lease such
aircraft (collectively, the "Leased Aircraft") or (ii) through separate secured
loan transactions, in which case the Company will own such aircraft
(collectively, the "Owned Aircraft");

            WHEREAS, in the case of each Owned Aircraft, each Owner Trustee,
acting on behalf of its respective Owner Participant, will issue, on a
non-recourse basis, Equipment Notes, among other things, to finance a portion of
the purchase price of such Leased Aircraft purchased or to be purchased by such
Owner Trustee and leased or to be leased to the Company pursuant to the related
Lease;

            WHEREAS, in the case of an Owned Aircraft, the Company will issue
Equipment Notes to finance a portion of the purchase price of such Owned
Aircraft;

            WHEREAS, pursuant to the terms and conditions of the Basic Agreement
as supplemented by this Trust Supplement (the "Agreement"), the Trustee shall
purchase such Equipment Notes issued by each Owner Trustee or the Company, as
the case may be, having the same interest rate as, and final maturity dates not
later than the final Regular Distribution Date of, the Certificates issued
hereunder and shall hold such Equipment Notes in trust for the benefit of the
Certificateholders;

            WHEREAS, the Trustee hereby declares the creation of this Trust (the
"1999-2C Trust" or the "Applicable Trust") for the benefit of the
Certificateholders, and the initial Certificateholders as the grantors of the
1999-2C Trust, by their respective acceptances of the Certificates, join in the
creation of this 1999-2C Trust with the Trustee;

            WHEREAS, all of the conditions and requirements necessary to make
this Trust Supplement, when duly executed and delivered, a valid, binding and
legal instrument in

<PAGE>
                                                                               2


accordance with its terms and for the purposes herein expressed, have been done,
performed and fulfilled, and the execution and delivery of this Trust Supplement
in the form and with the terms hereof have been in all respects duly authorized;
and

            WHEREAS, this Trust Supplement is subject to the provisions of the
Trust Indenture Act of 1939, as amended, and shall, to the extent applicable, be
governed by such provisions.

            NOW THEREFORE, in consideration of the premises herein, it is agreed
by and among the Guarantor, the Company and the Trustee as follows:

                                    ARTICLE I
                                THE CERTIFICATES

            Section 1.01. The Certificates. There is hereby created a series of
Certificates to be issued under the Agreement to be distinguished and known as
"Pass Through Certificates, Series 1999-2C" (hereinafter defined as the "Series
1999-2C Certificates" or the "Applicable Certificates"). Each Series 1999-2C
Certificate represents a Fractional Undivided Interest in the 1999-2C Trust
created hereby.

            The terms and conditions applicable to the Series 1999-2C
Certificates are as follows:

            (a) The aggregate principal amount of the Series 1999-2C
      Certificates that shall be authenticated under the Agreement (except for
      Series 1999-2C Certificates authenticated and delivered pursuant to
      Sections 3.03, 3.04 and 3.05 of the Basic Agreement) upon their initial
      issuance is $102,122,000.

            (b) The Cut-off Date is the earlier of (i) May 31, 2000 and (ii) the
      day Equipment Notes with respect to all of the Aircraft (as defined below)
      have been acquired by the Applicable Trust.

            (c) The Regular Distribution Dates with respect to any payment of
      Scheduled Payments means each March 1 and September 1, commencing on March
      1, 2000, until payment of all of the Scheduled Payments to be made under
      the Equipment Notes has been made.

            (d) The Special Distribution Dates are as follows: (i) when used
      with respect to the redemption or purchase of any Equipment Notes, the day
      (which shall be a Business Day) on which such redemption or purchase is
      scheduled to occur pursuant to the terms of the applicable Indenture and
      (ii) when used with respect to a Special Payment other than as described
      in clause (i) above, 15 days after the last date on which the Trustee must
      give notice pursuant to Section 4.02(c) of the Basic Agreement (or the
      next Business Day after such 15th day if such date is not a Business Day).

<PAGE>
                                                                               3


            (e) (i) The Series 1999-2C Certificates shall be in the form
      attached hereto as Exhibit A. Each purchaser of Series 1999-2C
      Certificates, by its acceptance of such Certificate or its interest
      therein, will be deemed to represent and warrant to and for the benefit of
      each Owner Participant and the Company that either (x) the assets of an
      employee benefit plan subject to Title I of the Employee Retirement Income
      Security Act of 1974, as amended ("ERISA"), or of a plan subject to
      Section 4975 of the Internal Revenue Code of 1986, as amended (the "Code")
      or of entities which may be deemed to hold such plans, have not been used
      to purchase Series 1999-2C Certificates or (y) one or more prohibited
      transaction statutory or administrative exemptions applies such that the
      use of such plan assets to purchase and hold such Certificate will not
      constitute a non-exempt prohibited transaction under ERISA or Section 4975
      of the Code.

            (ii) The Series 1999-2C Certificates shall be Book-Entry
      Certificates and shall be subject to the conditions set forth in the
      Letter of Representations among the Guarantor, the Company and the
      Clearing Agency (the "Clearing Agency") attached hereto as Exhibit B.

            (f) The Scheduled Payments of principal shall be as set forth in
      Exhibit C hereto.

            (g) The proceeds of the Series 1999-2C Certificates shall be
      deposited in the Deposit Accounts and will be used in accordance with the
      Escrow Agreement and the Deposit Agreement.

            (h) When each Aircraft is delivered, either the Owner Trustee (in
      the case of a Leased Aircraft), acting on behalf of its respective Owner
      Participant, will issue on a non-recourse basis, or the Company (in the
      case of an Owned Aircraft) will issue on a recourse basis, the Equipment
      Notes, the proceeds of which shall be used, among other things, to finance
      a portion of the purchase price to such Owner Trustee or the Company, as
      the case may be, of the following Aircraft:

            Registration Number           Aircraft Type         Engine Type
            -------------------           -------------         -----------

      N364NW ........................... Airbus A320-212         CFM56-5A3
      N365NW ........................... Airbus A320-212         CFM56-5A3
      N366NW ........................... Airbus A320-212         CFM56-5A3
      N367NW ........................... Airbus A320-212         CFM56-5A3
      N368NW ........................... AIrbus A320-212         CFM56-5A3
      N369NW ........................... Airbus A320-212         CFM56-5A3
      N370NW ........................... Airbus A320-212         CFM56-5A3
      N301NB ........................... Airbus A319-113         CFM56-5A4
      N302NB ........................... Airbus A319-113         CFM56-5A4
      N303NB ........................... Airbus A319-113         CFM56-5A4
<PAGE>
                                                                               4


            Registration Number           Aircraft Type         Engine Type
            -------------------           -------------         -----------

      N304NB.........................    Airbus A319-113         CFM56-5A4
      N305NB.........................    Airbus A319-113         CFM56-5A4
      N306NB.........................    Airbus A319-113         CFM56-5A4
      N307NB.........................    Airbus A319-113         CFM56-5A4
      N308NB.........................    Airbus A319-113         CFM56-5A4
      N309NB.........................    Airbus A319-113         CFM56-5A4
      N310NB.........................    Airbus A319-113         CFM56-5A4
      N311NB.........................    Airbus A319-113         CFM56-5A4
      N312NB.........................    Airbus A319-113         CFM56-5A4
      N313NB.........................    Airbus A319-113         CFM56-5A4
      N314NB.........................    Airbus A319-113         CFM56-5A4

            (i) At the Escrow Agent's request under the Escrow Agreement, the
      Trustee shall affix the corresponding Escrow Receipt to each Series
      1999-2C Certificate. In any event, any transfer or exchange of any Series
      1999-2C Certificate shall also effect a transfer or exchange of the
      related Escrow Receipt. Prior to the Final Withdrawal Date, no transfer or
      exchange of any Series 1999-2C Certificate shall be permitted unless the
      corresponding Escrow Receipt is attached thereto and also is so
      transferred or exchanged. By acceptance of any Series 1999-2C Certificate
      to which an Escrow Receipt is attached, each Certificateholder of such a
      Series 1999-2C Certificate acknowledges and accepts the restrictions on
      transfer of the Escrow Receipt set forth herein and in the Escrow
      Agreement.

            Section 1.02. Intercreditor Agreement. The Series 1999-2C
Certificates are subject to the Intercreditor Agreement, the Deposit Agreement
and the Escrow Agreement.

            Section 1.03. Ranking of Series 1999-2C Certificates. The Series
1999-2C Certificates will be subject to the ranking and priority as set forth in
the Intercreditor Agreement.

            Section 1.04. Liquidity Facility. Payments of interest on the Series
1999-2C Certificates will be supported by a Liquidity Facility to be provided by
the Liquidity Provider for the benefit of the Certificateholders.

            Section 1.05. Ranking of Equipment Notes. The Equipment Notes will
be subject to the ranking and priority as set forth in the related Indenture.

            Section 1.06. No Cross-Default or Cross-Collateralization of
Equipment Notes. As set forth in the related Indenture, there will not be any
cross-collateralization provisions or cross-default provisions in respect of the
Equipment Notes.

<PAGE>
                                                                               5


                                   ARTICLE II
                             PREDELIVERY FUNDING AND
                               STATEMENT OF INTENT

            Section 2.01. Predelivery Funding. On the date hereof, the proceeds
from the issuance of the Applicable Certificates will be deposited in the
Deposit Accounts on behalf of the Escrow Agent. Pursuant to the terms of the
Deposit Agreement and the Note Purchase Agreement, a portion of the proceeds
from the issuance of the Applicable Certificates will be withdrawn from the
Deposit Account on any date on which an Owner Trustee (in the case of a Leased
Aircraft) or the Company (in the case of an Owned Aircraft) issues Equipment
Notes with respect to an Aircraft.

            Section 2.02. Statement of Intent. The parties hereto intend that
the Applicable Trust be classified for U.S. federal income tax purposes as a
grantor trust under Subpart E, Part I of Subchapter J of the Code and not as a
trust or association taxable as a corporation or a partnership. Each of the
parties hereto and each Applicable Certificateholder, or beneficial owner of an
Applicable Certificate, by its acceptance of its Applicable Certificate or a
beneficial interest therein, agrees to treat for all U.S. federal, state and
local income tax purposes (i) the Applicable Trust as a grantor trust and (ii)
Equipment Notes to be issued (or assumed) by an Owner Trust (in the case of a
Leased Aircraft) as indebtedness of such Owner Trust, and Equipment Notes issued
by the Company (in the case of an Owned Aircraft) as indebtedness of the
Company.

                                   ARTICLE III
                                   DEFINITIONS

            Section 3.01. Definitions. (a) For all purposes of the Basic
Agreement as supplemented by this Trust Supplement, the following capitalized
terms have the following meanings:

            Aircraft: Means the seven new Airbus A320 aircraft and fourteen new
      Airbus A319 aircraft which were sold or are expected to be sold to the
      Owner Trustee or the Company during the period from March 1999 through
      February 2000.

            Applicable Certificateholder: Means the holder of an Applicable
      Certificate.

            Class D Certificateholder: Means the holder of a Class D
      Certificate.

            Class D Certificates: Has the meaning assigned in the Intercreditor
      Agreement.

            Clearing Agency: Has the meaning specified in Section 1.01(e)
      hereof.

            Clearing Agency Participant: Means any of the participants in the
      Clearing Agency.

<PAGE>
                                                                               6


            Closing Notice: Has the meaning specified in the Note Purchase
      Agreement.

            Cut-off Date: Has the meaning specified in Section 1.01(b).

            Deposit Account: Means an account established under Section 1.2 of
      the Deposit Agreement.

            Deposit Agreement: Means the Deposit Agreement dated as of June 25,
      1999 relating to the Applicable Certificates between the Depositary and
      the Escrow Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            Deposit Make-Whole Amount: Has the meaning specified in the Note
      Purchase Agreement.

            Depositary: Means ABN AMRO Bank N.V., Chicago Branch.

            Deposits: Has the meaning specified in the Note Purchase Agreement.

            Distribution Date: Means any Regular Distribution Date or Special
      Distribution Date.

            Escrow Agent: Means initially, First Security Bank, National
      Association, and any replacement or successor therefor appointed in
      accordance with the Escrow Agreement.

            Escrow Agreement: Means the Escrow and Paying Agent Agreement dated
      as of June 25, 1999 relating to the Applicable Certificates, among the
      Escrow Agent, the Paying Agent, the Trustee and the Underwriters, as the
      same may be amended, supplemented or otherwise modified from time to time
      in accordance with its terms.

            Escrow Receipt: Means the receipt substantially in the form annexed
      to the Escrow Agreement representing a fractional undivided interest in
      the funds held in the Paying Agent Account (as defined in the Escrow
      Agreement).

            Final Withdrawal: With respect to the Escrow Agreement, has the
      meaning set forth in Section 1.2 thereof.

            Final Withdrawal Date: Means the date on which the Final Withdrawal
      occurs.

            Intercreditor Agreement: Means the Intercreditor Agreement, dated as
      of the date hereof, by and among the Trustee, the Other Trustees, the
      Liquidity Providers named therein and State Street Bank and Trust Company,
      as Subordination Agent.

            Leased Aircraft: Has the meaning specified in the recitals hereto.

<PAGE>
                                                                               7


            Liquidity Facility: Has the meaning specified in the Note Purchase
      Agreement.

            Note Documents: With respect to any Equipment Note, means the Note
      Purchase Agreement, the related Indenture, the related Participation
      Agreement, and, if the related Aircraft is leased to the Company, the
      related Lease.

            Note Purchase Agreement: Means the Note Purchase Agreement, dated as
      of the date hereof, among the Company, the Trustee, the Other Trustees,
      State Street Bank and Trust Company, as Subordination Agent, the Escrow
      Agent and the Paying Agent.

            Notice of Purchase Withdrawal: Has the meaning specified in the Note
      Purchase Agreement.

            Other Agreements: Means the Basic Agreement as supplemented by Trust
      Supplement No. 1999-2A (the "1999-2A Trust Supplement") dated the date
      hereof relating to Northwest Airlines 1999-2A Pass Through Trust and by
      Trust Supplement No. 1999-2B (the "1999-2B Trust Supplement") dated the
      date hereof relating to the Northwest Airlines 1999-2B Pass Through Trust.

            Other Trustees: Means the trustee under the Other Agreements, and
      any successor or other trustee appointed as provided therein.

            Owned Aircraft: Has the meaning specified in the recitals hereto.

            Participation Agreement: Has the meaning specified in the Note
      Purchase Agreement.

            Paying Agent: Means State Street Bank and Trust Company.

            Pool Balance: Means, as of any date, (i) the original aggregate face
      amount of the Applicable Certificates less (ii) the aggregate amount of
      all payments made in respect of such Applicable Certificates or in respect
      of Deposits relating to the Applicable Trust other than payments made in
      respect of interest or premium thereon or reimbursement of any costs or
      expenses incurred in connection therewith. The Pool Balance as of any
      Distribution Date will be computed after giving effect to any special
      distribution with respect to unused Deposits, payment of principal of the
      Equipment Notes or payment with respect to other Trust Property and the
      distribution thereof to be made on that date.

            Prospectus Supplement: Means the Prospectus Supplement dated June
      18, 1999, relating to the offering of the Class A Certificates, the Class
      B Certificates and the Class C Certificates (each as defined in the
      Intercreditor Agreement).

            Pool Factor: Means, as of any Distribution Date, the quotient
      (rounded to the seventh decimal place) computed by dividing (i) the Pool
      Balance by (ii) the original aggregate face amount of the Applicable
      Certificates. The Pool Factor as of any Distribution Date shall be
      computed after giving effect to any special distribution with

<PAGE>
                                                                               8


      respect to unused Deposits, payment of principal of the Equipment Notes or
      other Trust Property and the distribution thereof to be made on that date.

            Record Date: Means the date preceding any Distribution Date on which
      the Applicable Certificateholders are determined for purposes of the
      distribution which will occur on such Distribution Date.

            Scheduled Closing Date: Has the meaning specified in the Note
      Purchase Agreement.

            Special Payment: Means any payment (other than a Scheduled Payment)
      in respect of, or any proceeds of, any Equipment Note.

            Special Redemption Premium: Means the Deposit Make-Whole Amount
      payable by the Company in respect of the Final Withdrawal pursuant to the
      Note Purchase Agreement.

            Trust Property: Means (i) the Equipment Notes held as the property
      of the Trust and, subject to the Intercreditor Agreement, all monies at
      any time paid thereon and all monies due and to become due thereunder,
      (ii) the rights of the Trust under the Escrow Agreement to request the
      Escrow Agent to withdraw from the Deposit Accounts funds sufficient to
      enable the Trust to purchase Equipment Notes on the delivery of an
      Aircraft, (iii) funds from time to time deposited in the Certificate
      Account and the Special Payments Account, and (iv) all rights of the Trust
      and the Trustee, on behalf of the Trust, under the Intercreditor
      Agreement, the Note Purchase Agreement and the Liquidity Facility,
      including, without limitation, all rights to receive certain payments
      thereunder, and all monies paid to the Trustee on behalf of the Trust
      pursuant to the Intercreditor Agreement or the Liquidity Facility.

            Trusts: Means, collectively, the Northwest Airlines 1999 Pass
      Through Trusts to be formed pursuant to the Basic Agreement, as
      supplemented by this Trust Supplement and the Other Agreements.

            Underwriters: Means the several Underwriters named in and who are
      parties to the Underwriting Agreement.

            Underwriting Agreement: Means the Underwriting Agreement dated as of
      June 18, 1999 by and among the Company, the Guarantor, Salomon Smith
      Barney Inc., Credit Suisse First Boston Corporation, ABN AMRO
      Incorporated, Credit Lyonnais Securities (USA) Inc. and Deutsche Bank
      Securities Inc.

<PAGE>
                                                                               9


                                   ARTICLE IV
                                   THE TRUSTEE

            Section 4.01. Delivery of Documents; Delivery Dates. (a) The Trustee
is hereby directed (i) to execute and deliver the Intercreditor Agreement, the
Escrow Agreement and the Note Purchase Agreement, each in the form delivered to
the Trustee by the Company and (ii) subject to the respective terms thereof, to
perform its obligations thereunder. Upon request of the Company and the
satisfaction or waiver of the closing conditions specified in the Underwriting
Agreement, the Trustee shall execute, deliver, authenticate, issue and sell
Applicable Certificates in authorized denominations equaling in the aggregate
the amount set forth, with respect to the Applicable Trust, in Schedule I to the
Underwriting Agreement evidencing the entire ownership interest in the Trust,
which amount equals the maximum aggregate principal amount of Equipment Notes
which may be purchased by the Trustee pursuant to the Note Purchase Agreement.
Except as provided in Sections 3.03, 3.04, 3.05 and 3.09 of the Basic Agreement,
the Trustee shall not execute, authenticate or deliver Applicable Certificates
in excess of the aggregate amount specified in this paragraph.

            (b) On or after the Issuance Date the Company may deliver from time
to time to the Trustee a Closing Notice relating to one or more Equipment Notes.
After receipt of a Closing Notice and in any case no later than two Business
Days prior to a Scheduled Closing Date as to which such Closing Notice relates
(the "Applicable Delivery Date"), the Trustee shall (as and when specified in
the Closing Notice) instruct the Escrow Agent to provide a Notice of Purchase
Withdrawal to the Depositary requesting (A) the withdrawal of one or more
Deposits on the Applicable Delivery Date in accordance with and to the extent
permitted by the terms of the Escrow Agreement and the Deposit Agreement and (B)
the payment of all, or a portion, of such Deposit or Deposits in an amount equal
in the aggregate to the purchase price of such Equipment Notes to or on behalf
of the Owner Trustee or the Company, as the case may be, issuing such Equipment
Notes, all as shall be described in the Closing Notice. The Trustee shall (as
and when specified in such Closing Notice), subject to the conditions set forth
in Section 3 of the Note Purchase Agreement, enter into and perform its
obligations under the Participation Agreement specified in such Closing Notice
(the "Applicable Participation Agreement") and cause such certificates,
documents and legal opinions relating to the Trustee to be duly delivered as
required by the Applicable Participation Agreement. If at any time prior to the
Applicable Delivery Date, the Trustee receives a notice of postponement pursuant
to Section 2(e) or 2(f) of the Note Purchase Agreement, then the Trustee shall
give the Depositary (with a copy to the Escrow Agent) a notice of cancellation
of such Notice of Purchase Withdrawal relating to such Deposit or Deposits on
such Applicable Delivery Date. Upon satisfaction of the conditions specified in
the Note Purchase Agreement and the Applicable Participation Agreement, the
Trustee shall purchase the applicable Equipment Notes with the proceeds of the
withdrawals of one or more Deposits made on the Applicable Delivery Date in
accordance with the terms of the Deposit Agreement and the Escrow Agreement. The
purchase price of such Equipment Notes shall equal the principal amount of such
Equipment Notes. Amounts withdrawn from such Deposit or Deposits in excess of
the purchase price of the Equipment Notes or to the extent not applied on the
Applicable Delivery Date to the purchase price of the Equipment Notes, shall be
re-deposited by the Trustee with the Depositary on the Applicable Delivery Date
in accordance with the terms of the Deposit Agreement.

<PAGE>
                                                                              10


            Section 4.02. Withdrawal of Deposits. If any Deposits remain
outstanding on the Business Day next succeeding the Cut-off Date, (i) the
Trustee shall give the Escrow Agent notice that the Trustee's obligation to
purchase Equipment Notes under the Note Purchase Agreement has terminated and
instruct the Escrow Agent to provide a notice of Final Withdrawal to the
Depositary substantially in the form of Exhibit B to the Deposit Agreement (the
"Final Withdrawal Notice") and (ii) the Trustee will make a demand upon the
Company for an amount equal to the Special Redemption Premium, such payment to
be made on the Final Withdrawal Date.

            Section 4.03. The Trustee. (a) Subject to Section 4.04 of this Trust
Supplement and Section 7.14 of the Basic Agreement, the Trustee shall not be
responsible in any manner whatsoever for or in respect of the validity or
sufficiency of this Trust Supplement, the Deposit Agreement or the Escrow
Agreement or the due execution hereof or thereof by the Company or the other
parties thereto (other than the Trustee), or for or in respect of the recitals
and statements contained herein or therein, all of which recitals and statements
are made solely by the Company.

            (b) Except as herein otherwise provided, no duties, responsibilities
or liabilities are assumed, or shall be construed to be assumed by the Trustee
by reason of this Trust Supplement other than as set forth in the Basic
Agreement, and this Trust Supplement is executed and accepted on behalf of the
Trustee, subject to all the terms and conditions set forth in the Basic
Agreement, upon the effectiveness thereof, as fully to all intents as if the
same were herein set forth at length.

            Section 4.04. Representations and Warranties of the Trustee. The
Trustee hereby represents and warrants that:

            (a) the Trustee has full power, authority and legal right to
      execute, deliver and perform this Trust Supplement, the Intercreditor
      Agreement, the Escrow Agreement and the Note Documents to which it is a
      party and has taken all necessary action to authorize the execution,
      delivery and performance by it of this Trust Supplement, the Intercreditor
      Agreement, the Escrow Agreement and the Note Documents to which it is a
      party;

            (b) the execution, delivery and performance by the Trustee of this
      Trust Supplement, the Intercreditor Agreement, the Escrow Agreement and
      the Note Documents to which it is a party (i) will not violate any
      provision of any United States federal law or the law of the state of the
      United States where it is located governing the banking and trust powers
      of the Trustee or any order, writ, judgment, or decree of any court,
      arbitrator or governmental authority applicable to the Trustee or any of
      its assets, (ii) will not violate any provision of the articles of
      association or by-laws of the Trustee, and (iii) will not violate any
      provision of, or constitute, with or without notice or lapse of time, a
      default under, or result in the creation or imposition of any lien on any
      properties included in the Trust Property pursuant to the provisions of
      any mortgage, indenture, contract, agreement or other undertaking to which
      it is a party, which violation, default or

<PAGE>
                                                                              11


      lien could reasonably be expected to have an adverse effect on the
      Trustee's performance or ability to perform its duties hereunder or
      thereunder or on the transactions contemplated herein or therein;

            (c) the execution, delivery and performance by the Trustee of this
      Trust Supplement, the Intercreditor Agreement, the Escrow Agreement and
      the Note Documents to which it is a party will not require the
      authorization, consent, or approval of, the giving of notice to, the
      filing or registration with, or the taking of any other action in respect
      of, any governmental authority or agency of the United States or the state
      of the United States where it is located regulating the banking and
      corporate trust activities of the Trustee; and

            (d) this Trust Supplement, the Intercreditor Agreement, the Escrow
      Agreement and the Note Documents to which it is a party have been, or will
      be, as applicable, duly executed and delivered by the Trustee and
      constitute, or will constitute, as applicable, the legal, valid and
      binding agreements of the Trustee, enforceable against it in accordance
      with their respective terms; provided, however, that enforceability may be
      limited by (i) applicable bankruptcy, insolvency, reorganization,
      moratorium or similar laws affecting the rights of creditors generally and
      (ii) general principles of equity.

            Section 4.05. Trustee Liens. The Trustee in its individual capacity
agrees, in addition to the agreements contained in Section 7.16 of the Basic
Agreement, that it will, at its own cost and expense, promptly take any action
as may be necessary to duly discharge and satisfy in full any Trustee's liens on
or with respect to the Trust Property which is attributable to the Trustee in
its individual capacity and which is unrelated to the transactions contemplated
by the Intercreditor Agreement or the Note Purchase Agreement.

                                    ARTICLE V
                             SUPPLEMENTAL AGREEMENT

            Section 5.01. Supplemental Agreements Without Consent of
Certificateholders.

            (a) Under the terms of, and subject to the limitations contained in,
Section 9.01 of the Basic Agreement, the Company may (but will not be required
to), and the Trustee (subject to Section 9.03 of the Basic Agreement) shall, at
the Company's request, at any time and from time to time, enter into one or more
agreements supplemental to the Escrow Agreement, the Note Purchase Agreement or
the Deposit Agreement, for any of the purposes set forth in clauses (1) through
(7) of such Section 9.01, except that (a) clause (3) of such Section 9.01 shall
be deemed to include the Company's rights and powers conferred by the Note
Purchase Agreement and (b) clause (4) of such Section 9.01 shall be deemed to
include corrections or supplements to provisions of the Escrow Agreement or the
Deposit Agreement which may be defective or inconsistent with any other
provision of this Agreement or contained in any agreement referred to in such
clause (4) and the curing of any ambiguity or the modification of any other
provision with respect to matters or questions arising under the Escrow
Agreement or the Deposit Agreement.

<PAGE>
                                                                              12


            (b) If Class D Certificates are issued, the Company, the Guarantor
and the Trustee, without the consent of the Applicable Certificateholders, may
enter into an agreement supplemental to this Trust Supplement whereby Class D
Certificateholders shall be granted purchase rights similar to those set forth
in Section 7.01 hereof.

            (c) Any supplemental agreement entered into pursuant to Sections
5.01(a) and (b) may not adversely affect the status of the Trust for U.S.
federal income tax purposes, as either (i) a grantor trust under Subpart E, Part
I of Subchapter J of Chapter 1 of Subtitle A of the Code or (ii) a partnership.

            Section 5.02. Supplement Agreements with Consent of
Certificateholders. The provisions of Section 9.02 of the Basic Agreement shall
apply to agreements or amendments for the purpose of adding any provisions to or
changing in any manner or eliminating any of the provisions of the Escrow
Agreement, the Deposit Agreement or the Note Purchase Agreement to the extent
applicable to the Certificateholders approving such agreement or amendment or
modifying in any manner the rights and obligations of such Certificateholders
under the Escrow Agreement, the Deposit Agreement or the Note Purchase
Agreement; provided that the provisions of Section 9.02(1) of the Basic
Agreement shall be deemed to include reductions in any manner of, or delay in
the timing of, any receipt by the Certificateholders of payments upon the
Deposits.

                                   ARTICLE VI
                 DISTRIBUTIONS; STATEMENT TO CERTIFICATEHOLDERS

            Section 6.01. Additions to Article IV of the Basic Agreement. In
addition to the provisions of Article IV of the Basic Agreement, the following
provisions shall apply to the Trust:

            (a) Upon the payment of Special Redemption Premium to the Trustee
      under the Note Purchase Agreement, the Trustee, upon receipt thereof,
      shall immediately deposit the aggregate amount of such Special Redemption
      Premium in the Special Payments account;

            (b) The distribution of amounts of Special Redemption Premium as
      provided for in Section 4.02(b) of the Basic Agreement shall be on the
      Special Distribution Date with respect to such Special Payment or as soon
      thereafter as the Trustee has confirmed receipt of the related Special
      Redemption Premium;

            (c) In the event of the payment of a Special Redemption Premium by
      the Company to the Trustee under the Note Purchase Agreement, the notice
      provided for in Section 4.02(c) of the Basic Agreement shall be mailed,
      together with the notice by the Paying Agent under Section 2.6 of the
      Escrow Agreement, not less that 15 days prior to the Special Distribution
      Date for such amount, which Special Distribution Date shall be the Final
      Withdrawal Date: and

<PAGE>
                                                                              13


            (d) The last sentence of the first paragraph of Section 4.02(c) of
      the Basic Agreement shall apply equally if the amount of Special
      Redemption Premium, if any, has not been calculated at the time the
      Trustee mails notice of a Special Payment.

            Section 6.02. Statements to Applicable Certificateholders; Federal
Income Tax Reporting. (a) On each Distribution Date, the Trustee will include
with each distribution to Applicable Certificateholders of a Scheduled Payment
or Special Payment, as the case may be, a statement setting forth the
information provided below (in the case of a Special Payment, including any
Special Redemption Premium, reflecting in part the information provided by the
Paying Agent under the Escrow Agreement). Such statement shall set forth (per
$1,000 face amount Applicable Certificate as to (ii), (iii), (iv) and (v) below)
the following information:

            (i) the aggregate amount of funds distributed on such Distribution
      Date under the Agreement and under the Escrow Agreement, indicating the
      amount allocable to each source;

            (ii) the amount of such distribution under the Agreement allocable
      to principal and the amount allocable to premium (including the Special
      Redemption Premium), if any;

            (iii) the amount of such distribution under the Agreement allocable
      to interest;

            (iv) the amount of such distribution under the Escrow Agreement
      allocable to interest;

            (v) the amount of such distribution under the Escrow Agreement
      allocable to Deposits; and

            (vi) the Pool Balance and the Pool Factor.

            With respect to the Applicable Certificates registered in the name
of a Clearing Agency, on the Record Date prior to each Distribution Date, the
Trustee will request from such Clearing Agency a securities position listing
setting forth the names of all Clearing Agency Participants reflected on such
Clearing Agency's books as holding interests in the Applicable Certificates on
such Record Date. On each Distribution Date, the Trustee will mail to each such
Clearing Agency Participant the statement described above and will make
available additional copies as requested by such Clearing Agency Participant for
forwarding to holders of interests in the Applicable Certificates.

            (b) Within a reasonable period of time after the end of each
calendar year but not later than the latest date permitted by law, the Trustee
shall furnish to each Person who at any time during such calendar year was an
Applicable Certificateholder of record a statement containing the sum of the
amounts determined pursuant to clauses (a)(i), (a)(ii), (a)(iii), (a)(iv) and
(a)(v) above for such calendar year or, in the event such Person was an
Applicable Certificateholder of record during a portion of such calendar year,
for such portion of such year, and such other items as are readily available to
the Trustee and which an Applicable

<PAGE>
                                                                              14


Certificateholder shall reasonably request as necessary for the purpose of such
Applicable Certificateholder's preparation of its federal income tax returns.
Such statement and such other items shall be prepared on the basis of
information supplied to the Trustee by the Clearing Agency Participants and
shall be delivered by the Trustee to such Clearing Agency Participants to be
available for forwarding by such Clearing Agency Participants to the holders of
interests in the Applicable Certificates in the manner described in Section
6.02(a) hereof.

            (c) Promptly following (i) the Cut-off Date, if there has been any
change in the information set forth in clauses (x) and (y) below from that set
forth in page S-37 of the Prospectus Supplement, and (ii) any early redemption
or purchase of, or any default in the payment of principal or interest in
respect of, any of the Equipment Notes held in the Applicable Trust, or any
Final Withdrawal, the Trustee shall furnish to Applicable Certificateholders of
record on such date a statement setting forth (x) the expected Pool Factors for
each subsequent Regular Distribution Date following the Cut-off Date and (y) the
expected principal distribution schedule of the Equipment Notes, in the
aggregate, held as Trust Property at the date of such notice. With respect to
the Applicable Certificates registered in the name of a Clearing Agency, on the
Cut-off Date, the Trustee will request from such Clearing Agency a securities
position listing setting forth the names of all Clearing Agency Participants
reflected on such Clearing Agency's books as holding interests in the Applicable
Certificates on such date. The Trustee will mail to each such Clearing Agency
Participant the statement described above and will make available additional
copies as requested by such Clearing Agency Participant for forwarding to
holders of interests in the Applicable Certificates.

            (d) Unless and until required otherwise by applicable authority, the
Trustee shall treat the Trust as a "grantor trust" under Subpart E, Part I,
Subchapter J of Chapter 1 of the Code, and shall file annually with the Internal
Revenue Service Form 1041, indicating the name and address of the Trust and
otherwise completed in blank, with attached statements identifying each
Certificateholder and its pro rata share of the income and expenses of the Trust
for the applicable portion of the preceding calendar year, on the cash or
accrual method, as the case may be, and shall furnish each Certificateholder
with a copy of its statement at the time and in the manner required by the Code.

            (e) This Section 6.02 supersedes and replaces Section 4.03 of the
Basic Agreement.

                                   ARTICLE VII
                                     DEFAULT

            Section 7.01. Purchase Rights of Certificateholders. (a) At any time
after the occurrence and during the continuance of a Triggering Event, each
Applicable Certificateholder shall have the right (which shall not expire upon
any purchase of the Class A Certificates by the Class B Certificateholders) to
purchase, for the purchase price set forth in Section 7.01 of the Other
Agreement relating to the Class A Certificates, all, but not less than all, of
the Class A Certificates and the Class B Certificates upon ten days' written
notice to the Class A Trustee, the Class B Trustee and each other Applicable
Certificateholder, provided that (i) if prior to the end

<PAGE>
                                                                              15


of such ten-day period any other Applicable Certificateholder notifies such
purchasing Applicable Certificateholder that such other Applicable
Certificateholder wants to participate in such purchase, then such other
Applicable Certificateholder may join with the purchasing Applicable
Certificateholder to purchase all, but not less than all, of the Class A
Certificates and the Class B Certificates pro rata based on the Fractional
Undivided Interest in the Applicable Trust held by each such Applicable
Certificateholder and (ii) if prior to the end of such ten-day period any other
Applicable Certificateholder fails to notify the purchasing Applicable
Certificateholder of such other Applicable Certificateholder's desire to
participate in such a purchase, then such other Applicable Certificateholder
shall lose its right to purchase the Class A Certificates and the Class B
Certificates pursuant to this Section 7.01(a).

            (b) As used in this Section 7.01, the terms "Class A Certificate",
"Class A Trustee", "Class B Certificate", "Class B Trustee" and "Class B
Certificateholder" shall have the respective meanings assigned to such terms in
the Intercreditor Agreement.

                                  ARTICLE VIII
                            MISCELLANEOUS PROVISIONS

            Section 8.01. Basic Agreement Ratified. Except and so far as herein
expressly provided, all of the provisions, terms and conditions of the Basic
Agreement are in all respects ratified and confirmed; and the Basic Agreement
and this Trust Supplement shall be taken, read and construed as one and the same
instrument.

            Section 8.02. GOVERNING LAW. THIS TRUST SUPPLEMENT AND THE SERIES
1999-2C CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK.

            Section 8.03. Execution in Counterparts. This Trust Supplement may
be executed in any number of counterparts, each of which shall be an original,
but such counterparts shall together constitute but one and the same instrument.

<PAGE>
                                                                              16


            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By: /s/ Daniel B. Matthews
                                          ---------------------------------
                                          Name: Daniel B. Matthews
                                          Title: Vice President & Assistant
                                                 Treasurer


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:

<PAGE>

            IN WITNESS WHEREOF, the Guarantor, the Company and the Trustee have
caused this Trust Supplement to be duly executed by their respective officers
thereto duly authorized, as of the day and year first written above.


                                      NORTHWEST AIRLINES, INC.

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      NORTHWEST AIRLINES CORPORATION,
                                        as Guarantor

                                      By:
                                          ---------------------------------
                                          Name:
                                          Title:


                                      STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT, NATIONAL
                                      ASSOCIATION, as Trustee

                                      By: /s/ Donald E. Smith
                                          ---------------------------------
                                          Name: DONALD E. SMITH
                                          Title: VICE PRESIDENT
<PAGE>

                                    EXHIBIT A

                               FORM OF CERTIFICATE

            Unless this certificate is presented by an authorized representative
of The Depository Trust Company, a New York corporation ("DTC"), to Issuer or
its agent for registration of transfer, exchange or payment, and any certificate
issued is registered in the name of Cede & Co. or in such other name as is
requested by an authorized representative of DTC (and any payment is made to
Cede & Co. or to such other entity as is requested by an authorized
representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch the registered owner hereof,
Cede & Co., has an interest herein.

            Any person acquiring this Certificate by its acceptance hereof or
its interest herein, will be deemed to represent and warrant to and for the
benefit of each Owner Participant and the Company that either (i) the assets of
an employee benefit plan subject to Title I of the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"), or of a plan subject to Section 4975
of the Internal Revenue Code of 1986, as amended (the "Code") or of entities
which may be deemed to hold such plans, have not been used to purchase this
Certificate or (ii) one or more prohibited transaction statutory or
administrative exemptions applies such that the use of such plan assets to
purchase and hold this Certificate will not constitute a non-exempt prohibited
transaction under ERISA or Section 4975 of the Code.

                  NORTHWEST AIRLINES 1999-2C PASS THROUGH TRUST

                                  Pass Through
                           Certificate, Series 1999-2C

                          Issuance Date: June 25, 1999

                  Final Legal Distribution Date: March 1, 2012

      Evidencing A Fractional undivided interest In the Northwest Airlines
      1999-2C Pass Through Trust, The Property Of Which Includes Certain
      Equipment Notes Each Secured By An Aircraft Leased To Or Owned By
      Northwest Airlines, Inc.

Certificate
No. _____         $________ Fractional undivided interest representing 0.__% of
                  the Trust per $1,000 of Reference Principal Amount

            THIS CERTIFIES THAT _______________, for value received, is the
registered owner of a Fractional Undivided Interest in the amount of $_______
(the "Reference Principal Amount") in the Northwest Airlines 1999-2C Pass
Through Trust (the "Trust") created by State Street Bank and Trust Company of
Connecticut, National Association, as trustee (the "Trustee"), pursuant to a
Pass Through Trust Agreement, dated as of June 3, 1999 (as amended or
supplemented, the "Basic Agreement"), by and among the Trustee, Northwest
Airlines

<PAGE>
                                                                               2


Corporation, a Delaware corporation (the "Guarantor"), and Northwest Airlines,
Inc., a Minnesota corporation (the "Company"), as supplemented by Trust
Supplement No. 1999-2C thereto, dated as of June 25, 1999 (collectively, the
"Agreement"), by and among the Trustee, the Guarantor and the Company, a summary
of certain of the pertinent provisions of which is set forth below. To the
extent not otherwise defined herein, the capitalized terms used herein have the
meanings assigned to them in the Agreement. This Certificate is one of the duly
authorized Certificates designated as "Pass Through Certificates, Series
1999-2C" (herein called the "Certificates"). This Certificate is issued under
and is subject to the terms, provisions and conditions of the Agreement and the
Intercreditor Agreement, to which Agreement the Certificateholder of this
Certificate by virtue of the acceptance hereof assents and by which such
Certificateholder is bound. The property of the Trust includes certain Equipment
Notes and all rights of the Trust to receive payments under the Intercreditor
Agreement and the Liquidity Facility (the "Trust Property"). Each issue of the
Equipment Notes is secured by a security interest in the Aircraft leased to or
owned by the Company.

            Each of the Certificates represents a Fractional Undivided Interest
in the Trust and the Trust Property and has no rights, benefits or interest in
respect of any other separate trust established pursuant to the terms of the
Basic Agreement for any other series of certificates issued pursuant thereto.

            Subject to and in accordance with the terms of the Agreement and the
Intercreditor Agreement, from funds then available to the Trustee, there will be
distributed on each March 1 and September 1 (a "Regular Distribution Date"),
commencing March 1, 2000 to the Person in whose name this Certificate is
registered at the close of business on the 15th day preceding the Regular
Distribution Date, an amount in respect of the Scheduled Payments on the
Equipment Notes due on such Regular Distribution Date, the receipt of which has
been confirmed by the Trustee, equal to the product of the percentage interest
in the Trust evidenced by this Certificate and an amount equal to the sum of
such Scheduled Payments. Subject to and in accordance with the terms of the
Agreement and the Intercreditor Agreement, in the event that Special Payments on
the Equipment Notes are received by the Trustee, from funds then available to
the Trustee, there shall be distributed on the applicable Special Distribution
Date, to the Person in whose name this Certificate is registered at the close of
business on the 15th day preceding the Special Distribution Date, an amount in
respect of such Special Payments on the Equipment Notes, the receipt of which
has been confirmed by the Trustee, equal to the product of the percentage
interest in the Trust evidenced by this Certificate and an amount equal to the
sum of such Special Payments so received. If a Regular Distribution Date or
Special Distribution Date is not a Business Day, distribution shall be made on
the immediately following Business Day with the same force and effect as if made
on such Regular Distribution Date or Special Distribution Date and no interest
shall accrue during the intervening period. The Trustee shall mail notice of
each Special Payment and the Special Distribution Date therefor to the
Certificateholder of this Certificate.

            Distributions on this Certificate will be made by the Trustee by
check mailed to the Person entitled thereto, without the presentation or
surrender of this Certificate or the making of any notation hereon, except that
with respect to Certificates registered on the Record Date in the name of a
Clearing Agency (or its nominee), such distribution shall be made by wire

<PAGE>
                                                                               3


transfer. Except as otherwise provided in the Agreement and notwithstanding the
above, the final distribution on this Certificate will be made after notice
mailed by the Trustee of the pendency of such distribution and only upon
presentation and surrender of this Certificate at the office or agency of the
Trustee specified in such notice.

            The Certificates do not represent an obligation of, or an obligation
guaranteed by, or an interest in, the Guarantor, the Company or the Trustee or
any affiliate thereof. The Certificates are limited in right or payment, all as
more specifically set forth herein and in the Agreement. All payments or
distributions made to Certificateholders under the Agreement shall be made only
from the Trust Property and only to the extent that the Trustee shall have
sufficient income or proceeds from the Trust Property to make such payments in
accordance with the terms of the Agreement. Each Certificateholder of this
Certificate, by its acceptance hereof, agrees that it will look solely to the
income and proceeds from the Trust Property to the extent available for
distribution to such Certificateholder as provided in the Agreement. This
Certificate does not purport to summarize the Agreement and reference is made to
the Agreement for information with respect to the interests, rights, benefits,
obligations, proceeds, and duties evidenced hereby. A copy of the Agreement may
be examined during normal business hours at the principal office of the Trustee,
and at such other places, if any, designated by the Trustee, by any
Certificateholder upon request.

            The Agreement permits, with certain exceptions therein provided, the
amendment thereof and the modification of the rights and obligations of the
Guarantor or the Company and the rights of the Certificateholders under the
Agreement at any time by the Guarantor, the Company and the Trustee with the
consent of the Certificateholders holding Certificates evidencing Fractional
Undivided Interests aggregating not less than a majority in interest in the
Trust. Any such consent by the Certificateholder of this Certificate shall be
conclusive and binding on such Certificateholder and upon all future
Certificateholders of this Certificate and of any Certificate issued upon the
transfer hereof or in exchange hereof or in lieu hereof whether or not notation
of such consent is made upon this Certificate. The Agreement also permits the
amendment thereof, in certain limited circumstances, without the consent of the
Certificateholders of any of the Certificates.

            As provided in the Agreement and subject to certain limitations set
forth, the transfer of this Certificate is registrable in the Register upon
surrender of this Certificate for registration of transfer at the offices or
agencies maintained by the Trustee in its capacity as Registrar, or by any
successor Registrar, duly endorsed or accompanied by a written instrument of
transfer in form satisfactory to the Trustee and the Registrar duly executed by
the Certificateholder hereof or such Certificateholder's attorney duly
authorized in writing, and thereupon one or more new Certificates of authorized
denominations evidencing the same aggregate Fractional Undivided Interest in the
Trust will be issued to the designated transferee or transferees.

            The Certificates are issuable only as registered Certificates
without coupons in minimum denominations of $1,000 Fractional Undivided
Interests and integral multiples thereof. As provided in the Agreement and
subject to certain limitations therein set forth, the Certificates are
exchangeable for new Certificates of authorized denominations evidencing the
same

<PAGE>
                                                                               4


aggregate Fractional Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.

            No service charge will be made for any such registration of transfer
or exchange, but the Trustee shall require payment of a sum sufficient to cover
any tax or governmental charge payable in connection therewith.

            Each Certificateholder or beneficial owner of a Certificate, by its
acceptance of this Certificate or a beneficial interest herein, agrees to treat
the Trust as a grantor trust for all U.S. federal, state and local income tax
purposes.

            The Trustee, the Registrar, and any agent of the Trustee or the
Registrar may treat the person in whose name this Certificate is registered as
the owner hereof for all purposes, and neither the Trustee, the Registrar, nor
any such agent shall be affected by any notice to the contrary.

            The obligations and responsibilities created by the Agreement and
the Trust created thereby shall terminate upon the distribution to
Certificateholders of all amounts required to be distributed to them pursuant to
the Agreement and the disposition of all property held as part of the Trust
Property.

            THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

            Unless the certificate of authentication hereon has been executed by
the Trustee, by manual signature, this Certificate shall not be entitled to any
benefit under the Agreement or be valid for any purpose.

            IN WITNESS WHEREOF, the Trustee has caused this Certificate to be
duly executed.

                                      NORTHWEST AIRLINES 1999-2C
                                        PASS THROUGH TRUST

                                      By: STATE STREET BANK AND
                                            TRUST COMPANY OF
                                            CONNECTICUT, NATIONAL
                                            ASSOCIATION, as Trustee


                                           By: ________________________________
                                               Name:
                                               Title:

<PAGE>
                                                                               5


               FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

            This is one of the Certificates referred to in the within-mentioned
Agreement.

                                      STATE STREET BANK AND TRUST
                                        COMPANY OF CONNECTICUT,
                                        NATIONAL ASSOCIATION,
                                        as Trustee


                                      By:  _______________________________
                                           Name:
                                           Title:

<PAGE>

                                    EXHIBIT B

                          DTC Letter of Representations

<PAGE>

                                    EXHIBIT C

                           REGULAR DISTRIBUTION DATES
                                       AND
                               SCHEDULED PAYMENTS

Regular Distribution Date          Scheduled Payment

March 1, 2000...................... $ 1,341,670.41
September 1, 2000..................   3,297,202.58
March 1, 2001......................   3,344,456.71
September 1, 2001..................   8,338,750.40
March 1, 2002......................   6,863,768.24
September 1, 2002..................     137,404.84
March 1, 2003......................   3,199,789.31
September 1, 2003..................           0.00
March 1, 2004......................   5,675,668.17
September 1, 2004..................           0.00
March 1, 2005......................  10,093,611.82
September 1, 2005..................           0.00
March 1, 2006......................  11,207,013.18
September 1, 2006..................           0.00
March 1, 2007......................  10,829,259.07
September 1, 2007..................           0.00
March 1, 2008......................   8,913,247.59
September 1, 2008..................           0.00
March 1, 2009......................  11,343,797.48
September 1, 2009..................           0.00
March 1, 2010......................  17,374,911.54
September 1, 2010..................     161,448.66
March 1, 2011......................           0.00
September 1, 2011..................           0.00
March 1, 2012......................           0.00
September 1, 2012..................           0.00
March 1, 2013......................           0.00
September 1, 2013..................           0.00
March 1, 2014......................           0.00
September 1, 2014..................           0.00
March 1, 2015......................           0.00
March 1, 2016......................           0.00
March 1, 2017......................           0.00
September 1, 2017..................           0.00
March 1, 2018......................           0.00
September 1, 2018..................           0.00
March 1, 2019......................           0.00



                                                                  EXECUTION COPY

- --------------------------------------------------------------------------------

                           REVOLVING CREDIT AGREEMENT
                                    (1999-2A)

                            Dated as of June 25, 1999

                                     between

                       STATE STREET BANK AND TRUST COMPANY

                             as Subordination Agent,

                                   as Borrower

                                       and

                                 CITIBANK, N.A.

                              as Liquidity Provider

- --------------------------------------------------------------------------------

                                   Relating to

                  Northwest Airlines Pass Through Trust 1999-2A
              7.575% Northwest Airlines Pass Through Certificates,
                                 Series 1999-2A

<PAGE>

                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----
ARTICLE I

      DEFINITIONS

      Section 1.01  Certain Defined Terms .................................    1

ARTICLE II

      AMOUNT AND TERMS OF THE COMMITMENT

      Section 2.01  The Advances ..........................................    7
      Section 2.02  Making the Advances ...................................    7
      Section 2.03  Fees ..................................................    9
      Section 2.04  Reduction or Termination of the Maximum Commitment ....    9
      Section 2.05  Repayments of Interest Advances or the Final Advance ..   10
      Section 2.06  Repayments of Provider Advances .......................   10
      Section 2.07  Payments to the Liquidity Provider Under the
                    Intercreditor Agreement ...............................   11
      Section 2.08  Book Entries ..........................................   11
      Section 2.09  Payments from Available Funds Only ....................   12
      Section 2.10  Extension of the Expiry Date; Non-Extension Advance....   12

ARTICLE III

      OBLIGATIONS OF THE BORROWER

      Section 3.01  Increased Costs .......................................   12
      Section 3.02  Capital Adequacy ......................................   13
      Section 3.03  Payments Free of Deductions ...........................   14
      Section 3.04  Payments ..............................................   15
      Section 3.05  Computations ..........................................   15
      Section 3.06  Payment on Non-Business Days ..........................   15
      Section 3.07  Interest ..............................................   15
      Section 3.08  Replacement of Borrower ...............................   17
      Section 3.09  Funding Loss Indemnification ..........................   17
      Section 3.10  Illegality ............................................   17

ARTICLE IV


                                        i
<PAGE>

                                                                            Page
                                                                            ----
      CONDITIONS PRECEDENT

      Section 4.01  Conditions Precedent to Effectiveness of Section 2.01..   17
      Section 4.02  Conditions Precedent to Borrowing .....................   19

ARTICLE V

      COVENANTS

      Section 5.01  Affirmative Covenants of the Borrower .................   19
      Section 5.02  Negative Covenants of the Borrower ....................   20

ARTICLE VI

      LIQUIDITY EVENTS OF DEFAULT

      Section 6.01  Liquidity Events of Default ...........................   20

ARTICLE VII

      MISCELLANEOUS

      Section 7.01  Amendments, Etc .......................................   21
      Section 7.02  Notices, Etc ..........................................   21
      Section 7.03  No Waiver; Remedies ...................................   22
      Section 7.04  Further Assurances ....................................   22
      Section 7.05  Indemnification; Survival of Certain Provisions .......   22
      Section 7.06  Liability of the Liquidity Provider ...................   22
      Section 7.07  Costs, Expenses and Taxes .............................   23
      Section 7.08  Binding Effect; Participations ........................   23
      Section 7.09  Severability ..........................................   25
      Section 7.10  GOVERNING LAW .........................................   25
      Section 7.11  Submission to Jurisdiction; Waiver of Jury
                    Trial; Waiver of Immunity .............................   25
      Section 7.12  Execution in Counterparts .............................   26
      Section 7.13  Entirety ..............................................   26
      Section 7.14  Headings ..............................................   26
      Section 7.15  LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES ......   26


                                       ii
<PAGE>

ANNEXES

ANNEX I    Interest Advance Notice of Borrowing
ANNEX II   Non-Extension Advance Notice of Borrowing
ANNEX III  Downgrade Advance Notice of Borrowing
ANNEX IV   Final Advance Notice of Borrowing
ANNEX V    Notice of Termination
ANNEX VI   Notice of Replacement Subordination Agent


                                      iii
<PAGE>

                           REVOLVING CREDIT AGREEMENT

            This REVOLVING CREDIT AGREEMENT dated as of June 25, 1999, between
STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company, not in its
individual capacity but solely as Subordination Agent under the Intercreditor
Agreement (each as defined below), (the "Borrower"), and CITIBANK, N.A, a
national banking association organized under the laws of the United States (the
"Liquidity Provider").

                              W I T N E S S E T H:

            WHEREAS, pursuant to the Class A Trust Agreement (such term and all
other capitalized terms used in these recitals having the meanings set forth or
referred to in Section 1.01), the Class A Trust is issuing the Class A
Certificates; and

            WHEREAS, the Borrower, in order to support the timely payment of a
portion of the interest on the Class A Certificates in accordance with their
terms, has requested the Liquidity Provider to enter into this Agreement,
providing in part for the Borrower to request in specified circumstances that
Advances be made hereunder.

            NOW, THEREFORE, in consideration of the premises, the parties hereto
agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

            Section 1.01 Certain Defined Terms. (a) Definitions. As used in this
Agreement and unless otherwise expressly indicated, or unless the context
clearly requires otherwise, the following capitalized terms shall have the
following respective meanings for all purposes of this Agreement:

            "Advance" means an Interest Advance, a Final Advance, a Provider
      Advance, an Applied Provider Advance or an Unpaid Advance, as the case may
      be.

            "Applicable Liquidity Rate" has the meaning assigned to such term in
      Section 3.07(g).

            "Applicable Margin" means with respect to any Unpaid Advance or
      Applied Provider Advance, 2.0%.

            "Applied Downgrade Advance" has the meaning assigned to such term in
      Section 2.06(a).

<PAGE>

            "Applied Non-Extension Advance" has the meaning assigned to such
      term in Section 2.06(a).

            "Applied Provider Advance" has the meaning assigned to such term in
      Section 2.06(a).

            "Base Rate" means a fluctuating interest rate per annum in effect
      from time to time, which rate per annum is at all times equal to (a) the
      weighted average of the rates on overnight Federal funds transactions with
      members of the Federal Reserve System arranged by Federal funds brokers,
      as published for such day (or, if such day is not a Business Day, for the
      next preceding Business Day) by the Federal Reserve Bank of New York, or
      if such rate is not so published for any day that is a Business Day, the
      average of the quotations for such day for such transactions received by
      the Liquidity Provider from three Federal funds brokers of recognized
      standing selected by the Liquidity Provider, plus (b) one quarter of one
      percent (0.25%) per annum.

            "Base Rate Advance" means an Advance that bears interest at a rate
      based upon the Base Rate.

            "Borrower" has the meaning assigned to such term in the recital of
      parties to this Agreement.

            "Borrowing" means the making of Advances requested by delivery of a
      Notice of Borrowing.

            "Business Day" means any day other than a Saturday or Sunday or a
      day on which commercial banks are required or authorized to close in New
      York, New York, Minneapolis, Minnesota, Chicago, Illinois, Boston,
      Massachusetts and Salt Lake City, Utah, or, so long as any Class A
      Certificate is outstanding, the city and state in which the Class A
      Trustee, the Borrower or any Loan Trustee maintains its Corporate Trust
      Office or receives or disburses funds, and, if the applicable Business Day
      relates to any Advance or other amount bearing interest based on the LIBOR
      Rate, on which dealings are carried on in the London interbank market.

            "Delivery Period" means the period from the date hereof through May
      31, 2000.

            "Deposit Agreement" means the Deposit Agreement, dated June 25,
      1999, between First Security Bank, National Association, as Escrow Agent
      and ABN AMRO Bank N.V., acting through its Chicago Branch, as Depositary,
      pertaining to the Class A Certificates, as the same may be amended,
      modified or supplemented from time to time in accordance with the terms
      thereof.

            "Depositary" has the meaning assigned to such term in the Deposit
      Agreement.


                                       2
<PAGE>

            "Deposits" has the meaning assigned to such terms in the Deposit
      Agreement.

            "Downgrade Advance" means an Advance made pursuant to Section
      2.02(c).

            "Effective Date" has the meaning specified in Section 4.01. The
      delivery of the certificate of the Liquidity Provider contemplated by
      Section 4.01(e) shall be conclusive evidence that the Effective Date has
      occurred.

            "Excluded Taxes" means (i) Taxes imposed on the overall net income
      of the Liquidity Provider and (ii) Excluded Withholding Taxes.

            "Excluded Withholding Taxes" means (i) withholding Taxes imposed by
      the United States except to the extent that such United States withholding
      Taxes are imposed as a result of any change in applicable law (excluding
      from "change in applicable law" for this purpose, a change in an
      applicable treaty or other change in law affecting the applicability of a
      treaty) after the date hereof, or in the case of a successor Liquidity
      Provider (including a transferee of an Advance) or Lending Office, after
      the date on which such successor Liquidity Provider obtains its interest
      or on which the Lending Office is changed, and (ii) any withholding Taxes
      imposed by the United States which are imposed or increased as a result of
      the Liquidity Provider failing to deliver to the Borrower any certificate
      or document (which certificate or document in the good faith judgment of
      the Liquidity Provider it is legally entitled to provide) which is
      reasonably requested by the Borrower to establish that payments under this
      Agreement are exempt from (or entitled to a reduced rate of) withholding
      Tax.

            "Expenses" means liabilities, obligations, damages, settlements,
      penalties, claims, actions, suits, costs, expenses, and disbursements
      (including, without limitation, reasonable fees and disbursements of legal
      counsel and costs of investigation), provided that Expenses shall not
      include any Taxes.

            "Expiry Date" means June 14, 2000, initially, or any date to which
      the Expiry Date is extended pursuant to Section 2.10.

            "Final Advance" means an Advance made pursuant to Section 2.02(d).

            "Intercreditor Agreement" means the Intercreditor Agreement dated
      the date hereof, among the Trustees, the Liquidity Provider, the liquidity
      provider under each Liquidity Facility (other than this Agreement) and the
      Subordination Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            "Interest Advance" means an Advance made pursuant to Section
      2.02(a).


                                       3
<PAGE>

            "Interest Period" means, with respect to any LIBOR Advance, each of
      the following periods:

            (i)   the period beginning either (x) on the date such LIBOR Advance
                  is made (or is converted from a Base Rate Advance) or (y) the
                  date of the withdrawal of funds from the Class A Cash
                  Collateral Account for the purpose of paying interest on the
                  Class A Certificates as contemplated by Section 2.06(a) hereof
                  and, in each case, ending on the next Regular Distribution
                  Date; and

            (ii)  each subsequent period commencing on the last day of the
                  immediately preceding Interest Period and ending on the next
                  Regular Distribution Date;

      provided, however, that if (x) the Final Advance shall have been made, or
      (y) other outstanding Advances shall have been converted into the Final
      Advance, then the Interest Periods shall be successive periods of one
      month beginning on the date such Final Advance is made (in the case of
      clause (x) above) or the Regular Distribution Date following such
      conversion (in the case of clause (y) above).

            "Lending Office" means the lending office of the Liquidity Provider
      presently located in New York, New York, or such other lending office as
      the Liquidity Provider from time to time shall notify the Borrower as its
      lending office hereunder.

            "LIBOR Advance" means an Advance bearing interest at a rate based
      upon the LIBOR Rate.

            "LIBOR Rate" means, with respect to any Interest Period, (i) the
      rate per annum appearing on display page 3750 (British Bankers
      Association--LIBOR) of the Dow Jones Markets Service (or any successor or
      substitute therefor) at approximately 11:00 A.M. (London time) two
      Business Days before the first day of such Interest Period, as the rate
      for dollar deposits with a maturity comparable to such Interest Period, or
      (ii) if the rate calculated pursuant to clause (i) above is not available,
      the average (rounded upwards, if necessary, to the next 1/16 of 1%) of the
      rates per annum at which deposits in dollars are offered for the relevant
      Interest Period by three banks of recognized standing selected by the
      Liquidity Provider in the London interbank market at approximately 11:00
      A.M. (London time) two business days before the first day of such Interest
      Period in an amount approximately equal to the principal amount of the
      LIBOR Advance to which such Interest Period is to apply and for a period
      comparable to such Interest Period.

            "Liquidity Event of Default" means the occurrence of the following:
      (i) all of the Equipment Notes shall have been either declared to be
      immediately due and payable or shall not have been paid at their final
      maturity; provided that, if an acceleration of the Equipment Notes occurs
      during the Delivery Period, a Liquidity Event of Default shall


                                       4
<PAGE>

      occur only if the aggregate principal amount of the Equipment Notes
      exceeds $300 million, or (ii) a Northwest Bankruptcy Event.

            "Liquidity Indemnitee" means (i) the Liquidity Provider, (ii) the
      directors, officers, employees and agents of the Liquidity Provider, and
      (iii) the successors and permitted assigns of the persons described in
      clauses (i) and (ii), inclusive.

            "Liquidity Provider" has the meaning assigned to such term in the
      recital of parties to this Agreement.

            "Maximum Available Commitment" shall mean, subject to the proviso
      contained in the third sentence of Section 2.02(a), at any time of
      determination, (a) the Maximum Commitment at such time less (b) the
      aggregate amount of each Interest Advance outstanding at such time;
      provided that following a Provider Advance or a Final Advance, the Maximum
      Available Commitment shall be zero.

            "Maximum Commitment" means, for any day, the lesser of (x)
      $39,002,235.75 and (y) the Required Amount on such day.

            "Non-Excluded Tax" has the meaning specified in Section 3.03(a).

            "Non-Extension Advance" means an Advance made pursuant to Section
      2.02(b).

            "Notice of Borrowing" has the meaning specified in Section 2.02(e).

            "Notice of Replacement Subordination Agent" has the meaning
      specified in Section 3.08.

            "Performing Note Deficiency" means any time that less than 65% of
      the then aggregate outstanding principal amount of all Equipment Notes are
      Performing Equipment Notes.

            "Prospectus Supplement" means the Prospectus Supplement dated June
      25, 1999, relating to the Class A Certificates, the Class B Certificates
      and the Class C Certificates, as such Prospectus Supplement may be amended
      or supplemented.

            "Provider Advance" means a Downgrade Advance or a Non-Extension
      Advance.

            "Replenishment Amount" has the meaning assigned to such term in
      Section 2.06(b).

            "Required Amount" means, for any day, the sum of the aggregate
      amount of interest, calculated at the rate per annum equal to the Stated
      Interest Rate for the Class A Certificates, that would be payable on the
      Class A Certificates on each of the three


                                       5
<PAGE>

      successive semiannual Regular Distribution Dates immediately following
      such day or, if such day is a Regular Distribution Date, on such day and
      the succeeding two semiannual Regular Distribution Dates, in each case
      calculated on the basis of the Pool Balance of the Class A Certificates on
      such day and without regard to expected future payments of principal on
      the Class A Certificates.

            "Termination Date" means the earliest to occur of the following: (i)
      the Expiry Date; (ii) the date on which the Borrower delivers to the
      Liquidity Provider a certificate, signed by a Responsible Officer of the
      Borrower, certifying that all of the Class A Certificates have been paid
      in full (or provision has been made for such payment in accordance with
      the Intercreditor Agreement and the Trust Agreements) or are otherwise no
      longer entitled to the benefits of this Agreement; (iii) the date on which
      the Borrower delivers to the Liquidity Provider a certificate, signed by a
      Responsible Officer of the Borrower, certifying that a Replacement
      Liquidity Facility has been substituted for this Agreement in full
      pursuant to Section 3.6(e) of the Intercreditor Agreement; (iv) the fifth
      Business Day following the receipt by the Borrower of a Termination Notice
      from the Liquidity Provider pursuant to Section 6.01 hereof; and (v) the
      date on which no Advance is or may (including by reason of reinstatement
      as herein provided) become available for a Borrowing hereunder.

            "Termination Notice" means the Notice of Termination substantially
      in the form of Annex V to this Agreement.

            "Transferee" has the meaning assigned to such term in Section
      7.08(b).

            "Unapplied Downgrade Advance" means any Downgrade Advance other than
      an Applied Downgrade Advance.

            "Unapplied Provider Advance" means any Provider Advance other than
      an Applied Provider Advance.

            "Unpaid Advance" has the meaning assigned to such term in Section
      2.05.

            (b) Terms Defined in the Intercreditor Agreement. For all purposes
of this Agreement, the following terms shall have the respective meanings
assigned to such terms in the Intercreditor Agreement:

      "Acceleration", "Certificates", "Class A Cash Collateral Account", "Class
      A Certificates", "Class A Certificateholders", "Class A Trust", "Class A
      Trust Agreement", "Class A Trustee", "Class B Certificates", "Class C
      Certificates", "Closing Date", "Controlling Party", "Corporate Trust
      Office", "Delivery Period Expiry Date", "Distribution Date", "Downgraded
      Facility", "Equipment Notes", "Final Legal Distribution Date", "Financing
      Agreement", "Indenture", "Interest Payment Date", "Investment Earnings",
      "Liquidity Facility", "Liquidity Obligations", "Loan Trustee",


                                       6
<PAGE>

      "Moody's", "Non-Extended Facility", "Northwest", "Northwest Bankruptcy
      Event", "Note Purchase Agreement", "Operative Agreements", "Performing
      Equipment Note", "Person", "Pool Balance", "Rating Agency", "Ratings
      Confirmation", "Regular Distribution Date", "Replacement Liquidity
      Facility", "Responsible Officer", "Scheduled Payment", "Special Payment",
      "Standard & Poor's", "Stated Interest Rate", "Subordination Agent",
      "Taxes", "Threshold Rating", "Trust Agreements", "Trustee",
      "Underwriters", "Underwriting Agreement" and "Written Notice".

                                   ARTICLE II

                       AMOUNT AND TERMS OF THE COMMITMENT

            Section 2.01 The Advances. The Liquidity Provider hereby irrevocably
agrees, on the terms and conditions hereinafter set forth, to make Advances to
the Borrower from time to time on any Business Day during the period from the
Effective Date until 12:00 Noon (New York City time) on the Expiry Date (unless
the obligations of the Liquidity Provider shall be earlier terminated in
accordance with the terms of Section 2.04(b)) in an aggregate amount at any time
outstanding not to exceed the Maximum Commitment.

            Section 2.02 Making the Advances. (a) Interest Advances shall be
made in one or more Borrowings by delivery to the Liquidity Provider of one or
more written and completed Notices of Borrowing in substantially the form of
Annex I attached hereto, signed by a Responsible Officer of the Borrower, in an
amount not exceeding the Maximum Available Commitment at such time and shall be
used solely for the payment when due of interest on the Class A Certificates at
the Stated Interest Rate therefor in accordance with Section 3.6(a) of the
Intercreditor Agreement. Each Interest Advance made hereunder shall
automatically reduce the Maximum Available Commitment and the amount available
to be borrowed hereunder by subsequent Advances by the amount of such Interest
Advance (subject to reinstatement as provided in the next sentence). Upon
repayment to the Liquidity Provider in full of the amount of any Interest
Advance made pursuant to this Section 2.02(a), together with accrued interest
thereon (as provided herein), the Maximum Available Commitment shall be
reinstated by the amount of such repaid Interest Advance, but not to exceed the
Maximum Commitment; provided, however, that the Maximum Available Commitment
shall not be so reinstated at any time if (i) a Liquidity Event of Default shall
have occurred and be continuing and (ii) there is a Performing Note Deficiency.

            (b) A Non-Extension Advance shall be made in a single Borrowing if
this Agreement is not extended in accordance with Section 3.6(d) of the
Intercreditor Agreement (unless a Replacement Liquidity Facility to replace this
Agreement shall have been delivered to the Borrower as contemplated by said
Section 3.6(d) within the time period specified in such Section) by delivery to
the Liquidity Provider of a written and completed Notice of Borrowing in
substantially the form of Annex II attached hereto, signed by a Responsible
Officer of the Borrower, in an amount equal to the Maximum Available Commitment
at such time, and shall be


                                       7
<PAGE>

used to fund the Class A Cash Collateral Account in accordance with said Section
3.6(d) and Section 3.6(f) of the Intercreditor Agreement.

            (c) A Downgrade Advance shall be made in a single Borrowing upon a
downgrading of the Liquidity Provider's short-term unsecured debt rating issued
by either Rating Agency below the applicable Threshold Rating (as provided for
in Section 3.6(c) of the Intercreditor Agreement) unless a Replacement Liquidity
Facility to replace this Agreement shall have been previously delivered to the
Borrower in accordance with said Section 3.6(c), by delivery to the Liquidity
Provider of a written and completed Notice of Borrowing in substantially the
form of Annex III attached hereto, signed by a Responsible Officer of the
Borrower, in an amount equal to the Maximum Available Commitment at such time,
and shall be used to fund the Class A Cash Collateral Account in accordance with
said Section 3.6(c) and Section 3.6(f) of the Intercreditor Agreement.

            (d) A Final Advance shall be made in a single Borrowing upon the
receipt by the Borrower of a Termination Notice from the Liquidity Provider
pursuant to Section 6.01 hereof by delivery to the Liquidity Provider of a
written and completed Notice of Borrowing in substantially the form of Annex IV
attached hereto, signed by a Responsible Officer of the Borrower, in an amount
equal to the Maximum Available Commitment at such time, and shall be used to
fund the Class A Cash Collateral Account in accordance with Section 3.6(i) and
Section 3.6(f) of the Intercreditor Agreement.

            (e) Each Borrowing shall be made on notice in writing (a "Notice of
Borrowing") in substantially the form required by Section 2.02(a), 2.02(b),
2.02(c) or 2.02(d), as the case may be, given by the Borrower to the Liquidity
Provider. If a Notice of Borrowing is delivered by the Borrower in respect of
any Borrowing no later than 1:00 p.m. (New York City time) on a Business Day,
upon satisfaction of the conditions precedent set forth in Section 4.02 with
respect to a requested Borrowing, the Liquidity Provider shall make available to
the Borrower, in accordance with its payment instructions, the amount of such
Borrowing in U.S. dollars and immediately available funds, before 4:00 p.m. (New
York City time) on such Business Day or on such later Business Day specified in
such Notice of Borrowing. If a Notice of Borrowing is delivered by the Borrower
in respect of any Borrowing after 1:00 p.m. (New York City time) on a Business
Day, upon satisfaction of the conditions precedent set forth in Section 4.02
with respect to a requested Borrowing, the Liquidity Provider shall make
available to the Borrower, in accordance with its payment instructions, the
amount of such Borrowing in U.S. dollars and immediately available funds, before
12:00 Noon (New York City time) on the first Business Day next following the day
of receipt of such Notice of Borrowing or on such later Business Day specified
by the Borrower in such Notice of Borrowing. Payments of proceeds of a Borrowing
shall be made by wire transfer of immediately available funds to the Borrower in
accordance with such wire transfer instructions as the Borrower shall furnish
from time to time to the Liquidity Provider for such purpose. Each Notice of
Borrowing shall be irrevocable and binding on the Borrower.


                                       8
<PAGE>

            (f) Upon the making of any Advance requested pursuant to a Notice of
Borrowing, in accordance with the Borrower's payment instructions, the Liquidity
Provider shall be fully discharged of its obligation hereunder with respect to
such Notice of Borrowing, and the Liquidity Provider shall not thereafter be
obligated to make any further Advances hereunder in respect of such Notice of
Borrowing to the Borrower or to any other Person. Following the making of any
Advance pursuant to Section 2.02(b), (c) or (d) hereof to fund the Class A Cash
Collateral Account, the Liquidity Provider shall have no interest in or rights
to the Class A Cash Collateral Account, such Advance or any other amounts from
time to time on deposit in the Class A Cash Collateral Account; provided that
the foregoing shall not affect or impair the obligations of the Subordination
Agent to make the distributions contemplated by Section 3.6(e) or (f) of the
Intercreditor Agreement. By paying to the Borrower proceeds of Advances
requested by the Borrower in accordance with the provisions of this Agreement,
the Liquidity Provider makes no representation as to, and assumes no
responsibility for, the correctness or sufficiency for any purpose of the amount
of the Advances so made and requested.

            Section 2.03 Fees. (a) The Borrower agrees to pay to the Liquidity
Provider on the effective date a non-refundable fee equal to $226,880.91 in
aggregate with respect to this Agreement, the Revolving Credit Agreement
(1999-2B) dated as of June 25, 1999, by and between State Street Bank and Trust
Company and Citibank, N.A., and the Revolving Credit Agreement (1999-2C) dated
as of June 25, 1999, by and between State Street Bank and Trust Company and
Citibank, N.A.

            (b) The Borrower shall pay, or shall cause to be paid, to the
Liquidity Provider, a fee equal to 0.35% per annum on the average Maximum
Available Commitment from the Effective Date to the earlier of the date on which
a Downgrade Advance or Non-Extension Advance is made and the date on which the
Maximum Commitment terminates. Such fee shall be payable in arrears on each
Regular Distribution Date. In addition, the Borrower shall pay, or shall cause
to be paid, to the Liquidity Provider, a fee equal to 0.35% per annum on the
unpaid principal amount of each Downgrade Advance or Non-Extension Advance
(other than an Applied Downgrade Advance or an Applied Non-Extension Advance)
from and including the date of such Advance to but excluding the date such
principal amount shall be paid in full. Such fee shall be payable in arrears on
each Regular Distribution Date and, in the event of the payment of principal of
such Downgrade Advance or Non-Extension Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of the foregoing
fee accrued on the amount of principal repaid). Nothing contained in this
Section 2.03(b) shall require the Borrower to pay any amount under this Section
2.03(b) other than to the extent the Borrower shall have funds available
therefor, and, in all events, subject to the terms of the Intercreditor
Agreement.

            Section 2.04 Reduction or Termination of the Maximum Commitment.

            (a) Automatic Reduction. Promptly following each date on which the
Required Amount is reduced as a result of a reduction in the Pool Balance of the
Class A Certificates or otherwise, the Maximum Commitment shall automatically be
reduced to an amount equal to such


                                       9
<PAGE>

reduced Required Amount (as calculated by the Borrower). The Borrower shall give
notice of any such automatic reduction of the Maximum Commitment to the
Liquidity Provider within two Business Days thereof. The failure by the Borrower
to furnish any such notice shall not affect such automatic reduction of the
Maximum Commitment.

            (b) Termination. Upon the making of any Provider Advance or Final
Advance hereunder or the occurrence of the Termination Date, the obligation of
the Liquidity Provider to make further Advances hereunder shall automatically
and irrevocably terminate, and the Borrower shall not be entitled to request any
further Borrowing hereunder.

            Section 2.05 Repayments of Interest Advances or the Final Advance.
Subject to Sections 2.06, 2.07 and 2.09 hereof, the Borrower hereby agrees,
without notice of an Advance or demand for repayment from the Liquidity Provider
(which notice and demand are hereby waived by the Borrower), to pay, or to cause
to be paid, to the Liquidity Provider on each date on which the Liquidity
Provider shall make an Interest Advance or the Final Advance, an amount equal to
(a) the amount of such Advance (any such Advance, until repaid, is referred to
herein as an "Unpaid Advance"), plus (b) interest on the amount of each such
Unpaid Advance as provided in Section 3.07 hereof; provided that if (i) the
Liquidity Provider shall make a Provider Advance at any time after making one or
more Interest Advances which shall not have been repaid in accordance with this
Section 2.05 or (ii) this Liquidity Facility shall become a Downgraded Facility
or Non-Extended Facility at any time when unreimbursed Interest Advances have
reduced the Maximum Available Commitment to zero, then such Interest Advances
shall cease to constitute Unpaid Advances and shall be deemed to have been
changed into an Applied Downgrade Advance or an Applied Non-Extension Advance,
as the case may be, for all purposes of this Agreement (including, without
limitation, for the purpose of determining when such Interest Advance is
required to be repaid to the Liquidity Provider in accordance with Section 2.06
and for the purposes of Section 2.06(b)). The Borrower and the Liquidity
Provider agree that the repayment in full of each Interest Advance and Final
Advance on the date such Advance is made is intended to be a contemporaneous
exchange for new value given to the Borrower by the Liquidity Provider.

            Section 2.06 Repayments of Provider Advances. (a) Amounts advanced
hereunder in respect of a Provider Advance shall be deposited in the Class A
Cash Collateral Account, invested and withdrawn from the Class A Cash Collateral
Account as set forth in Sections 3.6(c), (d) and (f) of the Intercreditor
Agreement. The Borrower agrees to pay to the Liquidity Provider, on each Regular
Distribution Date, commencing on the first Regular Distribution Date after the
making of a Provider Advance, interest on the principal amount of any such
Provider Advance as provided in Section 3.07; provided, however, that amounts in
respect of a Provider Advance withdrawn from the Class A Cash Collateral Account
for the purpose of paying interest on the Class A Certificates in accordance
with Section 3.6(f) of the Intercreditor Agreement (the amount of any such
withdrawal being (y) in the case of a Downgrade Advance, an "Applied Downgrade
Advance" and (z) in the case of a Non-Extension Advance, an "Applied
Non-Extension Advance" and, together with an Applied Downgrade Advance, an
"Applied Provider Advance") shall thereafter (subject to Section 2.06(b)) be
treated as an Interest Advance


                                       10
<PAGE>

under this Agreement for purposes of determining the Applicable Liquidity Rate
for interest payable thereon; provided further, however, that if, following the
making of a Provider Advance, the Liquidity Provider delivers a Termination
Notice to the Borrower pursuant to Section 6.01 hereof, such Provider Advance
shall thereafter be treated as a Final Advance under this Agreement for purposes
of determining the Applicable Liquidity Rate for interest payable thereon.
Subject to Sections 2.07 and 2.09 hereof, immediately upon the withdrawal of any
amounts from the Class A Cash Collateral Account on account of a reduction in
the Required Amount, the Borrower shall repay to the Liquidity Provider a
portion of the Provider Advances in a principal amount equal to such reduction,
plus interest on the principal amount prepaid as provided in Section 3.07
hereof.

            (b) At any time when an Applied Provider Advance (or any portion
thereof) is outstanding, upon the deposit in the Class A Cash Collateral Account
of any amount pursuant to clause "third" of Section 2.4(b) of the Intercreditor
Agreement, clause "third" of Section 3.2 of the Intercreditor Agreement or
clause "fourth" of Section 3.3 of the Intercreditor Agreement (any such amount
being a "Replenishment Amount") for the purpose of replenishing or increasing
the balance thereof up to the Required Amount at such time, (i) the aggregate
outstanding principal amount of all Applied Provider Advances (and of Provider
Advances treated as an Interest Advance for purposes of determining the
Applicable Liquidity Rate for interest payable thereon) shall be automatically
reduced by the amount of such Replenishment Amount and (ii) the aggregate
outstanding principal amount of all Unapplied Provider Advances shall be
automatically increased by the amount of such Replenishment Amount.

            (c) Upon the provision of a Replacement Liquidity Facility in
replacement of this Agreement in accordance with Section 3.6(e) of the
Intercreditor Agreement, amounts remaining on deposit in the Class A Cash
Collateral Account after giving effect to any Applied Provider Advance on the
date of such replacement shall be reimbursed to the Liquidity Provider, but only
to the extent such amounts are necessary to repay in full to the Liquidity
Provider all amounts owing to it hereunder.

            Section 2.07 Payments to the Liquidity Provider Under the
Intercreditor Agreement. In order to provide for payment or repayment to the
Liquidity Provider of any amounts hereunder, the Intercreditor Agreement
provides that amounts available and referred to in Articles II and III of the
Intercreditor Agreement, to the extent payable to the Liquidity Provider
pursuant to the terms of the Intercreditor Agreement (including, without
limitation, Section 3.6(f) of the Intercreditor Agreement), shall be paid to the
Liquidity Provider in accordance with the terms thereof. Amounts so paid to the
Liquidity Provider shall be applied by the Liquidity Provider to Liquidity
Obligations then due and payable in accordance with the Intercreditor Agreement
or, if not provided for in the Intercreditor Agreement, then in such manner as
the Liquidity Provider shall deem appropriate.

            Section 2.08 Book Entries. The Liquidity Provider shall maintain in
accordance with its usual practice an account or accounts evidencing the
indebtedness of the Borrower resulting from Advances made from time to time and
the amounts of principal and interest


                                       11
<PAGE>

payable hereunder and paid from time to time in respect thereof; provided,
however, that the failure by the Liquidity Provider to maintain such account or
accounts shall not affect the obligations of the Borrower in respect of
Advances.

            Section 2.09 Payments from Available Funds Only. All payments to be
made by the Borrower under this Agreement shall be made only from the amounts
that constitute Scheduled Payments, Special Payments or payments under Section
7(c) of the Participation Agreements and Section 7 of the Note Purchase
Agreement and only to the extent that the Borrower shall have sufficient income
or proceeds therefrom to enable the Borrower to make payments in accordance with
the terms hereof after giving effect to the priority of payments provisions set
forth in the Intercreditor Agreement. The Liquidity Provider agrees that it will
look solely to such amounts to the extent available for distribution to it as
provided in the Intercreditor Agreement and this Agreement and that the
Borrower, in its individual capacity, is not personally liable to it for any
amounts payable or liability under this Agreement except as expressly provided
in this Agreement, the Intercreditor Agreement or any Participation Agreement.
Amounts on deposit in the Class A Cash Collateral Account shall be available to
the Borrower to make payments under this Agreement only to the extent and for
the purposes expressly contemplated in Section 3.6(f) of the Intercreditor
Agreement.

            Section 2.10 Extension of the Expiry Date; Non-Extension Advance. No
earlier than the 60th day and no later than the 40th day prior to the then
effective Expiry Date (unless such Expiry Date is on or after the date that is
15 days after the Final Legal Distribution Date for the Class A Certificates),
the Borrower shall request that the Liquidity Provider extend the Expiry Date
for a period of 364 days after the then effective Expiry Date (unless the
obligations of the Liquidity Provider are earlier terminated in accordance with
the terms hereof). The Liquidity Provider shall advise the Borrower, no earlier
than 40 days and no later than 25 days prior to the then effective Expiry Date,
whether, in its sole discretion, it agrees to so extend the Expiry Date. If the
Liquidity Provider advises the Borrower on or before the 25th day prior to the
Expiry Date then in effect that such Expiry Date shall not be so extended, or
fails to irrevocably and unconditionally advise the Borrower on or before the
25th day prior to the Expiry Date then in effect that such Expiry Date shall be
so extended (and, in each case, if the Liquidity Provider shall not have been
replaced in accordance with Section 3.6(e) of the Intercreditor Agreement), the
Borrower shall be entitled on and after such 25th day (but prior to the then
effective Expiry Date) to request a Non-Extension Advance in accordance with
Section 2.02(b) hereof and Section 3.6(d) of the Intercreditor Agreement.

                                   ARTICLE III

                           OBLIGATIONS OF THE BORROWER

            Section 3.01 Increased Costs. If the Liquidity Provider shall
determine that (a) any change after the date hereof in any law, regulation, rule
or directive or in the interpretation thereof by any court or administrative or
governmental authority charged with the administration thereof or in the
compliance by the Liquidity Provider (or its head office) with any applicable


                                       12
<PAGE>

direction, request or requirement (whether or not having the force of law) of
any central bank or competent governmental or other authority shall either (i)
impose, modify or deem applicable any reserve, special deposit or similar
requirement against assets held by, or deposits in or for the account of, or
loans made by, the Liquidity Provider, or (ii) impose on the Liquidity Provider
any other condition regarding this Agreement or any Advance, or (iii) subject
the Liquidity Provider to any Taxes with respect to amounts payable or paid or
change the basis of taxation of any amounts payable to the Liquidity Provider
(other than Excluded Taxes) and (b) the result of any event referred to in the
preceding clauses (i), (ii) or (iii) shall be to increase the cost to the
Liquidity Provider of issuing or maintaining its commitment or funding or
maintaining Advances (which increase in cost shall be determined by the
Liquidity Provider's reasonable allocations of the aggregate of such cost
increases resulting from such event), then, upon demand by the Liquidity
Provider (such demand to be made not later than 180 days after a Responsible
Officer of the Liquidity Provider obtains actual knowledge of any event referred
to in clause (i), (ii) or (iii) above), the Borrower shall pay, or cause to be
paid, to the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such increased cost; provided that if such demand for
payment is made after such 180-day period, the Borrower shall be obligated to
pay such additional amounts only with respect to such increased cost actually
incurred or effected on or after the 180th day prior to the date of such demand.
A certificate as to such increased cost incurred by the Liquidity Provider as a
result of any event mentioned in clauses (i), (ii) or (iii) above, prepared in
reasonable detail and submitted by the Liquidity Provider to the Borrower, shall
be conclusive evidence of the amount owed under this Section, absent manifest
error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.01 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.02 Capital Adequacy. If the Liquidity Provider shall
determine that the adoption of any applicable law, rule or regulation regarding
capital adequacy, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by the Liquidity Provider (or its head office) with any request or directive
regarding capital adequacy (whether or not having the force of law) of any such
authority, central bank or comparable agency, in each case after the date
hereof, has the effect of reducing the rate of return on the Liquidity
Provider's capital as a consequence of issuing or maintaining its commitment
hereunder or its funding or maintaining Advances to a level below that which the
Liquidity Provider could have achieved but for such adoption, change or
compliance (taking into consideration the Liquidity Provider's policies with
respect to capital adequacy) by an amount deemed by the Liquidity Provider to be
material, then, upon demand by the Liquidity Provider, the Borrower shall pay to
the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such reduction in respect of issuing or maintaining its
commitment hereunder or its funding or


                                       13
<PAGE>

maintaining Advances. A certificate as to any such additional amount describing
the event which has the effect of reducing the rate of return on the Liquidity
Provider's capital, prepared in reasonable detail and submitted by the Liquidity
Provider to the Borrower, shall be conclusive evidence of the amount owed under
this Section, absent manifest error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.02 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.03 Payments Free of Deductions. (a) All payments made by
the Borrower under this Agreement shall be made free and clear of, and without
reduction for or on account of, any present or future stamp or other taxes,
levies, imposts, duties, charges, fees, deductions, withholdings, restrictions
or conditions of any nature whatsoever now or hereafter imposed, levied,
collected, withheld or assessed, excluding Excluded Taxes (such non-excluded
taxes being referred to herein, collectively, as "Non-Excluded Taxes" and,
individually, as a "Non-Excluded Tax"). If any Non-Excluded Taxes are required
to be withheld from any amounts payable to the Liquidity Provider under this
Agreement, the amounts so payable to the Liquidity Provider shall be increased
to the extent necessary to yield to the Liquidity Provider (after payment of all
Non-Excluded Taxes and taxes imposed on the receipt of such increase) interest
or any other such amounts payable under this Agreement at the rates or in the
amounts specified in this Agreement. The Liquidity Provider agrees to use
reasonable efforts (consistent with its internal policy and legal and regulatory
restrictions) to change the jurisdiction of its Lending Office if making such
change would avoid the need for, or reduce the amount of, any such additional
amounts that may thereafter accrue and would not, in the reasonable judgment of
the Liquidity Provider, be otherwise disadvantageous to the Liquidity Provider.
From time to time upon the reasonable request of the Borrower, the Liquidity
Provider agrees to provide to the Borrower, to the extent that the Liquidity
Provider is legally entitled to do so, two original Internal Revenue Service
Forms 1001 or 4224, as appropriate, or any successor or other form prescribed by
the Internal Revenue Service, certifying that the Liquidity Provider is exempt
from or entitled to a reduced rate of United States withholding tax on payments
pursuant to this Agreement.

            (b) All payments (including, without limitation, Advances) made by
the Liquidity Provider under this Agreement shall be made free and clear of, and
without reduction for or on account of, any Taxes. If any Taxes are required to
be withheld or deducted from any amounts payable to the Borrower under this
Agreement, the Liquidity Provider shall (i) within the time prescribed therefor
by applicable law pay to the appropriate governmental or taxing authority the
full amount of any such Taxes (and any additional Taxes in respect of the
payment required under clause (ii) hereof) and make such reports or returns in
connection therewith at the time or times and in the manner prescribed by
applicable law, and (ii) pay to the Borrower an additional amount which (after
deduction of all such Taxes) will be sufficient to yield to the Borrower the
full amount which would have been received by it had no such withholding or


                                       14
<PAGE>

deduction been made. Within 30 days after the date of each payment hereunder,
the Liquidity Provider shall furnish to the Borrower the original or a certified
copy of (or other documentary evidence of) the payment of the Taxes applicable
to such payment.

            Section 3.04 Payments. The Borrower shall make or cause to be made
each payment to the Liquidity Provider under this Agreement so as to cause the
same to be received by the Liquidity Provider not later than 1:00 P.M. (New York
City time) on the day when due. The Borrower shall make all such payments in
lawful money of the United States of America, to the Liquidity Provider in
immediately available funds, by wire transfer to Citibank, N.A., New York, N.Y.,
ABA #021000089, Account No. 4063287, Reference: Northwest Airlines Liquidity
Facility 1999-2A, Attention: Tim Smith, Global Loans.

            Section 3.05 Computations. All computations of interest based on the
Base Rate shall be made on the basis of a year of 365 or 366 days, as the case
may be, and all computations of interest based on the LIBOR Rate shall be made
on the basis of a year of 360 days, in each case for the actual number of days
(including the first day but excluding the last day) occurring in the period for
which such interest is payable.

            Section 3.06 Payment on Non-Business Days. Whenever any payment to
be made hereunder shall be stated to be due on a day other than a Business Day,
such payment shall be made on the next succeeding Business Day and no additional
interest shall be due as a result (and if so made, shall be deemed to have been
made when due). If any payment in respect of interest on an Advance is so
deferred to the next succeeding Business Day, such deferral shall not delay the
commencement of the next Interest Period for such Advance (if such Advance is a
LIBOR Advance) or reduce the number of days for which interest will be payable
on such Advance on the next interest payment date for such Advance.

            Section 3.07 Interest. (a) Subject to Section 2.09, the Borrower
shall pay, or shall cause to be paid, without duplication, interest on (i) the
unpaid principal amount of each Advance from and including the date of such
Advance (or, in the case of an Applied Provider Advance, from and including the
date on which the amount thereof was withdrawn from the Class A Cash Collateral
Account to pay interest on the Class A Certificates) to but excluding the date
such principal amount shall be paid in full (or, in the case of an Applied
Provider Advance, the date on which the Class A Cash Collateral Account is fully
replenished in respect of such Advance) and (ii) any other amount due hereunder
(whether fees, commissions, expenses or other amounts or, to the extent
permitted by law, installments of interest on Advances or any such other amount)
which is not paid when due (whether at stated maturity, by acceleration or
otherwise) from and including the due date thereof to but excluding the date
such amount is paid in full, in each such case, at a fluctuating interest rate
per annum for each day equal to the Applicable Liquidity Rate (as defined below)
for such Advance or such other amount as in effect for such day, but in no event
at a rate per annum greater than the maximum rate permitted by applicable law;
provided, however, that, if at any time the otherwise applicable interest rate
as set forth in this Section 3.07 shall exceed the maximum rate permitted by
applicable law, then any subsequent reduction in such interest rate will not
reduce the rate of interest payable pursuant to


                                       15
<PAGE>

this Section 3.07 below the maximum rate permitted by applicable law until the
total amount of interest accrued equals the amount of interest that would have
accrued if such otherwise applicable interest rate as set forth in this Section
3.07 had at all times been in effect.

            (b) Each Advance (other than any Unapplied Provider Advance) will be
either a Base Rate Advance or a LIBOR Advance as provided in this Section. Each
such Advance will be a Base Rate Advance for the period from the date of its
borrowing to (but excluding) the third Business Day following the Liquidity
Provider's receipt of the Notice of Borrowing for such Advance. Thereafter, such
Advance shall be a LIBOR Advance; provided that (i) an Applied Provider Advance
shall always be a LIBOR Advance unless the Borrower elects otherwise and (ii)
the Borrower (at the direction of the Controlling Party, so long as the
Liquidity Provider is not the Controlling Party) may (x) convert the Final
Advance into a Base Rate Advance on the last day of an Interest Period for such
Advance by giving the Liquidity Provider no less than four Business Days' prior
written notice of such election or (y) elect to maintain the Final Advance as a
Base Rate Advance by not requesting a conversion of the Final Advance to a LIBOR
Advance under Clause (5) of the applicable Notice of Borrowing (or, if such
Final Advance is deemed to have been made, without delivery of a Notice of
Borrowing pursuant to Section 2.06, by requesting, prior to 11:00 A.M. on the
first Business Day immediately following the Borrower's receipt of the
applicable Termination Notice, that such Final Advance not be converted from a
Base Rate Advance to a LIBOR Advance).

            (c) Each LIBOR Advance shall bear interest during each Interest
Period at a rate per annum equal to the LIBOR Rate for such Interest Period plus
the Applicable Margin for such LIBOR Advance, payable in arrears on the last day
of such Interest Period and, in the event of the payment of principal of such
LIBOR Advance on a day other than such last day, on the date of such payment (to
the extent of interest accrued on the amount of principal repaid).

            (d) Each Base Rate Advance shall bear interest at a rate per annum
equal to the Base Rate plus the Applicable Margin for such Base Rate Advance,
payable in arrears on each Regular Distribution Date and, in the event of the
payment of principal of such Base Rate Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of interest
accrued on the amount of principal repaid).

            (e) Each Unapplied Provider Advance shall bear interest in an amount
equal to the Investment Earnings on amounts on deposit in the Class A Cash
Collateral Account, payable in arrears on each Distribution Date.

            (f) Each amount not paid when due hereunder (whether fees,
commissions, expenses or other amounts or, to the extent permitted by applicable
law, installments of interest on Advances but excluding Advances) shall bear
interest at a rate per annum equal to the Base Rate plus 2.0% until paid.


                                       16
<PAGE>

            (g) Each change in the Base Rate shall become effective immediately.
The rates of interest specified in this Section 3.07 with respect to any Advance
or other amount shall be referred to as the "Applicable Liquidity Rate".

            Section 3.08 Replacement of Borrower. From time to time and subject
to the successor Borrower's meeting the eligibility requirements set forth in
Section 6.9 of the Intercreditor Agreement applicable to the Subordination
Agent, upon the effective date and time specified in a written and completed
Notice of Replacement Subordination Agent in substantially the form of Annex VI
attached hereto (a "Notice of Replacement Subordination Agent") delivered to the
Liquidity Provider by the then Borrower, the successor Borrower designated
therein shall be substituted for as the Borrower for all purposes hereunder.

            Section 3.09 Funding Loss Indemnification. The Borrower shall pay to
the Liquidity Provider, upon the request of the Liquidity Provider, such amount
or amounts as shall be sufficient (in the reasonable opinion of the Liquidity
Provider) to compensate it for any loss, cost, or expense incurred as a result
of:

            (1) Any repayment of a LIBOR Advance on a date other than the last
      day of the Interest Period for such Advance; or

            (2) Any failure by the Borrower to borrow a LIBOR Advance on the
      date for borrowing specified in the relevant notice under Section 2.02.

            Section 3.10 Illegality. Notwithstanding any other provision in this
Agreement, if any change in any applicable law, rule or regulation, or any
change in the interpretation or administration thereof by any governmental
authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by the Liquidity Provider (or its Lending
Office) with any request or directive (whether or not having the force of law)
of any such authority, central bank or comparable agency shall make it unlawful
or impossible for the Liquidity Provider (or its Lending Office) to maintain or
fund its LIBOR Advances, then upon notice to the Borrower by the Liquidity
Provider, the outstanding principal amount of the LIBOR Advances shall be
converted to Base Rate Advances (a) immediately upon demand of the Liquidity
Provider, if such change or compliance with such request, in the judgment of the
Liquidity Provider, requires immediate repayment; or (b) at the expiration of
the last Interest Period to expire before the effective date of any such change
or request.

                                   ARTICLE IV

                              CONDITIONS PRECEDENT

            Section 4.01 Conditions Precedent to Effectiveness of Section 2.01.
Section 2.01 of this Agreement shall become effective on and as of the first
date (the "Effective Date") on which the following conditions precedent have
been satisfied or waived:


                                       17
<PAGE>

            (a) The Liquidity Provider shall have received on or before the
      Closing Date each of the following, and in the case of each document
      delivered pursuant to paragraphs (i), (ii) and (iii), each in form and
      substance satisfactory to the Liquidity Provider:

                  (i) This Agreement duly executed on behalf of the Borrower;

                  (ii) The Intercreditor Agreement duly executed on behalf of
            each of the parties thereto;

                  (iii) Fully executed copies of each of the Operative
            Agreements executed and delivered on or before the Closing Date
            (other than this Agreement and the Intercreditor Agreement);

                  (iv) A copy of the Prospectus Supplement and specimen copies
            of the Class A Certificates;

                  (v) An executed copy of each document, instrument, certificate
            and opinion delivered on or before the Closing Date pursuant to the
            Class A Trust Agreement, the Intercreditor Agreement and the other
            Operative Agreements (in the case of each such opinion, other than
            the opinion of counsel for the Underwriters, either addressed to the
            Liquidity Provider or accompanied by a letter from the counsel
            rendering such opinion to the effect that the Liquidity Provider is
            entitled to rely on such opinion as of its date as if it were
            addressed to the Liquidity Provider);

                  (vi) Evidence that there shall have been made and shall be in
            full force and effect, all filings, recordings and/or registrations,
            and there shall have been given or taken any notice or other similar
            action as may be reasonably necessary or, to the extent reasonably
            requested by the Liquidity Provider, reasonably advisable, in order
            to establish, perfect, protect and preserve the right, title and
            interest, remedies, powers, privileges, liens and security interests
            of, or for the benefit of, the Trustees, the Borrower and the
            Liquidity Provider created by the Operative Agreements executed and
            delivered on or prior to the Closing Date;

                  (vii) A letter from Northwest Airlines Corporation, pursuant
            to which (i) Northwest Airlines Corporation agrees to provide copies
            of quarterly financial statements and audited annual financial
            statements to the Liquidity Provider, and such other information as
            the Liquidity Provider shall reasonably request with respect to the
            transactions contemplated by the Operative Agreements, in each case,
            only to the extent that Northwest Airlines Corporation is obligated
            to provide such information pursuant to Section 16 of the Leases
            (related to Leased Aircraft) or the corresponding section of the
            Indentures (related to Owned Aircraft) to the parties thereto; and


                                       18
<PAGE>

                  (viii) Such other documents, instruments, opinions and
            approvals pertaining to the transactions contemplated hereby or by
            the other Operative Agreements as the Liquidity Provider shall have
            reasonably requested.

            (b) The following statement shall be true on and as of the Effective
      Date: no event has occurred and is continuing, or would result from the
      entering into of this Agreement or the making of any Advance, which
      constitutes a Liquidity Event of Default.

            (c) The Liquidity Provider shall have received payment in full of
      all fees and other sums required to be paid to or for the account of the
      Liquidity Provider on or prior to the Effective Date.

            (d) All conditions precedent to the issuance of the Certificates
      under the Trust Agreements shall have been satisfied or waived, all
      conditions precedent to the effectiveness of the other Liquidity
      Facilities shall have been satisfied or waived, and all conditions
      precedent to the purchase of the Class A Certificates, Class B
      Certificates and Class C Certificates by the Underwriters under the
      Underwriting Agreement shall have been satisfied (unless any of such
      conditions precedent shall have been waived by the Underwriters).

            (e) The Borrower shall have received a certificate, dated the date
      hereof, signed by a duly authorized representative of the Liquidity
      Provider, certifying that all conditions precedent to the effectiveness of
      Section 2.01 have been satisfied or waived.

            Section 4.02 Conditions Precedent to Borrowing. The obligation of
the Liquidity Provider to make an Advance on the occasion of each Borrowing
shall be subject to the conditions precedent that the Effective Date shall have
occurred and, prior to the date of such Borrowing, the Borrower shall have
delivered a Notice of Borrowing which conforms to the terms and conditions of
this Agreement and has been completed as may be required by the relevant form of
the Notice of Borrowing for the type of Advances requested.

                                    ARTICLE V

                                    COVENANTS

            Section 5.01 Affirmative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will, unless the Liquidity
Provider shall otherwise consent in writing:

            (a) Performance of This and Other Agreements. Punctually pay or
      cause to be paid all amounts payable by it under this Agreement and the
      other Operative Agreements and observe and perform in all material
      respects the conditions, covenants and


                                       19
<PAGE>

      requirements applicable to it contained in this Agreement and the other
      Operative Agreements.

            (b) Reporting Requirements. Furnish to the Liquidity Provider with
      reasonable promptness, such other information and data with respect to the
      transactions contemplated by the Operative Agreements as from time to time
      may be reasonably requested by the Liquidity Provider; and permit the
      Liquidity Provider, upon reasonable notice, to inspect the Borrower's
      books and records with respect to such transactions and to meet with
      officers and employees of the Borrower to discuss such transactions.

            (c) Certain Operative Agreements. Furnish to the Liquidity Provider
      with reasonable promptness, such Operative Agreements entered into after
      the date hereof as from time to time may be reasonably requested by the
      Liquidity Provider.

            Section 5.02 Negative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will not appoint or permit or
suffer to be appointed any successor Borrower without the prior written consent
of the Liquidity Provider, which consent shall not be unreasonably withheld or
delayed.

                                   ARTICLE VI

                           LIQUIDITY EVENTS OF DEFAULT

            Section 6.01 Liquidity Events of Default. If (a) any Liquidity Event
of Default has occurred and is continuing and (b) there is a Performing Note
Deficiency, the Liquidity Provider may, in its discretion, deliver to the
Borrower a Termination Notice, the effect of which shall be to cause (i) this
Agreement to expire on the fifth Business Day after the date on which such
Termination Notice is received by the Borrower, (ii) the Borrower to promptly
request, and the Liquidity Provider to promptly make, a Final Advance in
accordance with Section 2.02(d) hereof and Section 3.6(i) of the Intercreditor
Agreement, (iii) all other outstanding Advances to be automatically converted
into Final Advances for purposes of determining the Applicable Liquidity Rate
for interest payable thereon, and (iv) subject to Sections 2.07 and 2.09 hereof,
all Advances (including, without limitation, any Provider Advance and Applied
Provider Advance), any accrued interest thereon and any other amounts
outstanding hereunder to become immediately due and payable to the Liquidity
Provider.


                                       20
<PAGE>

                                   ARTICLE VII

                                  MISCELLANEOUS

            Section 7.01 Amendments, Etc. No amendment or waiver of any
provision of this Agreement, nor consent to any departure by the Borrower
therefrom, shall in any event be effective unless the same shall be in writing
and signed by the Liquidity Provider, and, in the case of an amendment or of a
waiver by the Borrower, the Borrower, and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given.

            Section 7.02 Notices, Etc. Except as otherwise expressly provided
herein, all notices and other communications provided for hereunder shall be in
writing (including telecopier and mailed or delivered or sent by telecopier):

            Borrower:   STATE STREET BANK AND TRUST COMPANY
                        Two International Place
                        4th Floor
                        Boston, Massachusetts  02110
                        Attention:  Corporate Trust Administration
                        Telecopy:   (617) 664-5151

  Liquidity Provider:   CITIBANK, N.A.
                        Two Penns' Way, Suite 200
                        New Castle, DE  19720
                        Attention:  Tim Smith, Global Loans
                        Telecopy: (302) 894-6120

                        with a copy to:

                        CITIBANK, N.A.
                        Global Aviation
                        399 Park Avenue, 12th Floor
                        New York, New York  10043
                        Attention:  Tom Boyle
                        Telecopy:  (212) 793-1246

or, as to each of the foregoing, at such other address as shall be designated by
such Person in a written notice to the others. All such notices and
communications shall be effective (i) if given by telecopier, when transmitted
to the telecopier number specified above, (ii) if given by mail, when deposited
in the mails addressed as specified above, and (iii) if given by other means,
when delivered at the address specified above, except that written notices to
the Liquidity Provider pursuant to the provisions of Articles II and III hereof
shall not be effective until received by the Liquidity Provider. A copy of all
notices delivered hereunder to either party shall in addition be


                                       21
<PAGE>

delivered to each of the parties to the Participation Agreements at their
respective addresses set forth therein.

            Section 7.03 No Waiver; Remedies. No failure on the part of the
Liquidity Provider to exercise, and no delay in exercising, any right under this
Agreement shall operate as a waiver thereof; nor shall any single or partial
exercise of any right under this Agreement preclude any other or further
exercise thereof or the exercise of any other right. The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.

            Section 7.04 Further Assurances. The Borrower agrees to do such
further acts and things and to execute and deliver to the Liquidity Provider
such additional assignments, agreements, powers and instruments as the Liquidity
Provider may reasonably require or deem advisable to carry into effect the
purposes of this Agreement and the other Operative Agreements or to better
assure and confirm unto the Liquidity Provider its rights, powers and remedies
hereunder and under the other Operative Agreements.

            Section 7.05 Indemnification; Survival of Certain Provisions. The
Liquidity Provider shall be indemnified hereunder to the extent and in the
manner described in Section 7(c) of the Participation Agreements. In addition,
the Borrower agrees to indemnify, protect, defend and hold harmless the
Liquidity Provider from, against and in respect of, and shall pay on demand, all
Expenses of any kind or nature whatsoever (other than any Expenses of the nature
described in Sections 3.01, 3.02 or 7.07 hereof (regardless of whether
indemnified against pursuant to said Sections)), that may be imposed, incurred
by or asserted against any Liquidity Indemnitee, in any way relating to,
resulting from, or arising out of or in connection with any action, suit or
proceeding by any third party against such Liquidity Indemnitee and relating to
this Agreement, the Intercreditor Agreement or any Financing Agreement;
provided, however, that the Borrower shall not be required to indemnify,
protect, defend and hold harmless any Liquidity Indemnitee in respect of any
Expense of such Liquidity Indemnitee to the extent such Expense is (i)
attributable to the gross negligence or willful misconduct of such Liquidity
Indemnitee or any other Liquidity Indemnitee, (ii) ordinary and usual operating
overhead expense, or (iii) attributable to the failure by such Liquidity
Indemnitee or any other Liquidity Indemnitee to perform or observe any
agreement, covenant or condition on its part to be performed or observed in this
Agreement, the Intercreditor Agreement or any other Operative Agreement to which
it is a party. The indemnities contained in Section 7(c) of the Participation
Agreements, and the provisions of Sections 3.01, 3.02, 3.03, 7.05 and 7.07
hereof, shall survive the termination of this Agreement.

            Section 7.06 Liability of the Liquidity Provider. (a) Neither the
Liquidity Provider nor any of its officers, employees, directors or affiliates
shall be liable or responsible for: (i) the use which may be made of the
Advances or any acts or omissions of the Borrower or any beneficiary or
transferee in connection therewith; (ii) the validity, sufficiency or
genuineness of documents, or of any endorsement thereon, even if such documents
should prove to be in any or all respects invalid, insufficient, fraudulent or
forged; or (iii) the making of Advances by the Liquidity Provider against
delivery of a Notice of Borrowing and other documents which do not


                                       22
<PAGE>

comply with the terms hereof; provided, however, that the Borrower shall have a
claim against the Liquidity Provider, and the Liquidity Provider shall be liable
to the Borrower, to the extent of any damages suffered by the Borrower which
were the result of (A) the Liquidity Provider's willful misconduct or negligence
in determining whether documents presented hereunder comply with the terms
hereof, or (B) any breach by the Liquidity Provider of any of the terms of this
Agreement, including, but not limited to, the Liquidity Provider's failure to
make lawful payment hereunder after the delivery to it by the Borrower of a
Notice of Borrowing strictly complying with the terms and conditions hereof.

            (b) Neither the Liquidity Provider nor any of its officers,
employees, directors or affiliates shall be liable or responsible in any respect
for (i) any error, omission, interruption or delay in transmission, dispatch or
delivery of any message or advice, however transmitted, in connection with this
Agreement or any Notice of Borrowing delivered hereunder, or (ii) any action,
inaction or omission which may be taken by it in good faith, absent willful
misconduct or negligence (in which event the extent of the Liquidity Provider's
potential liability to the Borrower shall be limited as set forth in the
immediately preceding paragraph), in connection with this Agreement or any
Notice of Borrowing.

            Section 7.07 Costs, Expenses and Taxes. The Borrower agrees to pay,
or cause to be paid (A) on the Effective Date and on such later date or dates on
which the Liquidity Provider shall make demand, all reasonable out-of-pocket
costs and expenses (including, without limitation, the reasonable fees and
expenses of outside counsel for the Liquidity Provider) of the Liquidity
Provider in connection with the preparation, negotiation, execution, delivery,
filing and recording of this Agreement, any other Operative Agreement and any
other documents which may be delivered in connection with this Agreement and (B)
on demand, all reasonable costs and expenses (including reasonable counsel fees
and expenses) of the Liquidity Provider in connection with (i) the enforcement
of this Agreement or any other Operative Agreement, (ii) the modification or
amendment of, or supplement to, this Agreement or any other Operative Agreement
or such other documents which may be delivered in connection herewith or
therewith (whether or not the same shall become effective) or (iii) any action
or proceeding relating to any order, injunction, or other process or decree
restraining or seeking to restrain the Liquidity Provider from paying any amount
under this Agreement, the Intercreditor Agreement or any other Operative
Agreement or otherwise affecting the application of funds in the Class A Cash
Collateral Account. In addition, the Borrower shall pay any and all recording,
stamp and other similar taxes and fees payable or determined to be payable in
connection with the execution, delivery, filing and recording of this Agreement,
any other Operative Agreement and such other documents, and agrees to save the
Liquidity Provider harmless from and against any and all liabilities with
respect to or resulting from any delay in paying or omission to pay such taxes
or fees.

            Section 7.08 Binding Effect; Participations. (a) This Agreement
shall be binding upon and inure to the benefit of the Borrower and the Liquidity
Provider and their respective successors and assigns, except that neither the
Liquidity Provider (except as otherwise provided in this Section 7.08) nor
(except as contemplated by Section 3.08) the Borrower shall have the


                                       23
<PAGE>

right to assign its rights or obligations hereunder or any interest herein
without the prior written consent of the other party, subject to the
requirements of Section 7.08(b). The Liquidity Provider may grant participations
herein or in any of its rights hereunder (including, without limitation, funded
participations and participations in rights to receive interest payments
hereunder) and under the other Operative Agreements to such Persons as the
Liquidity Provider may in its sole discretion select (but excluding Northwest
and any of its affiliates), subject to the requirements of Section 7.08(b). No
such participation by the Liquidity Provider, however, will relieve the
Liquidity Provider of its obligations hereunder. In connection with any
participation or any proposed participation, the Liquidity Provider may disclose
to the participant or the proposed participant any information that the Borrower
is required to deliver or to disclose to the Liquidity Provider pursuant to this
Agreement. The Borrower acknowledges and agrees that the Liquidity Provider's
source of funds may derive in part from its participants. Accordingly,
references in this Agreement and the other Operative Agreements to
determinations, reserve and capital adequacy requirements, increased costs,
reduced receipts, additional amounts due pursuant to Section 3.03(a) and the
like as they pertain to the Liquidity Provider shall be deemed also to include
those of each of its participants (subject, in each case, to the maximum amount
that would have been incurred by or attributable to the Liquidity Provider
directly if the Liquidity Provider, rather than the participant, had held the
interest participated).

            (b) If, pursuant to subsection (a) above, the Liquidity Provider
sells any participation in this Agreement to any bank or other entity (each, a
"Transferee"), then, concurrently with the effectiveness of such participation,
the Transferee shall (i) represent to the Liquidity Provider (for the benefit of
the Liquidity Provider and the Borrower) either (A) that it is incorporated
under the laws of the United States or a state thereof or (B) that under
applicable law and treaties, no taxes will be required to be withheld with
respect to any payments to be made to such Transferee in respect of this
Agreement, (ii) furnish to the Liquidity Provider and the Borrower either (x) a
statement that it is incorporated under the laws of the United States or a state
thereof or (y) if it is not so incorporated, two copies of a properly completed
United States Internal Revenue Service Form 4224 or Form 1001, as appropriate,
or other applicable form, certificate or document prescribed by the Internal
Revenue Service certifying, in each case, such Transferee's entitlement to a
complete exemption from United States federal withholding tax in respect to any
and all payments to be made hereunder, and (iii) agree (for the benefit of the
Liquidity Provider and the Borrower) to provide the Liquidity Provider and the
Borrower a new Form 4224 or Form 1001, as appropriate, (A) on or before the date
that any such form expires or becomes obsolete or (B) after the occurrence of
any event requiring a change in the most recent form previously delivered by it
and prior to the immediately following due date of any payment by the Borrower
hereunder, certifying in the case of a Form 1001 or Form 4224 that such
Transferee is entitled to a complete exemption from United States federal
withholding tax on payments under this Agreement. Unless the Borrower has
received forms or other documents reasonably satisfactory to it (and required by
applicable law) indicating that payments hereunder are not subject to United
States federal withholding tax, the Borrower will withhold taxes as required by
law from such payments at the applicable statutory rate.


                                       24
<PAGE>

            (c) Notwithstanding the other provisions of this Section 7.08, the
Liquidity Provider may assign and pledge all or any portion of the Advances
owing to it to any Federal Reserve Bank or the United States Treasury as
collateral security pursuant to Regulation A of the Board of Governors of the
Federal Reserve System and any Operating Circular issued by such Federal Reserve
Bank, provided that any payment in respect of such assigned Advances made by the
Borrower to the Liquidity Provider in accordance with the terms of this
Agreement shall satisfy the Borrower's obligations hereunder in respect of such
assigned Advance to the extent of such payment. No such assignment shall release
the Liquidity Provider from its obligations hereunder.

            Section 7.09 Severability. Any provision of this Agreement which is
prohibited, unenforceable or not authorized in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition,
unenforceability or non-authorization without invalidating the remaining
provisions hereof or affecting the validity, enforceability or legality of such
provision in any other jurisdiction.

            Section 7.10 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

            Section 7.11 Submission to Jurisdiction; Waiver of Jury Trial;
Waiver of Immunity. (a) Each of the parties hereto hereby irrevocably and
unconditionally:

            (i) submits for itself and its property in any legal action or
      proceeding relating to this Agreement or any other Operative Agreement, or
      for recognition and enforcement of any judgment in respect hereof or
      thereof, to the nonexclusive general jurisdiction of the courts of the
      State of New York, the courts of the United States of America for the
      Southern District of New York, and the appellate courts from any thereof;

            (ii) consents that any such action or proceeding may be brought in
      such courts, and waives any objection that it may now or hereafter have to
      the venue of any such action or proceeding in any such court or that such
      action or proceeding was brought in an inconvenient court and agrees not
      to plead or claim the same;

            (iii) agrees that service of process in any such action or
      proceeding may be effected by mailing a copy thereof by registered or
      certified mail (or any substantially similar form and mail), postage
      prepaid, to each party hereto at its address set forth in Section 7.02
      hereof, or at such other address of which the Liquidity Provider shall
      have been notified pursuant thereto; and

            (iv) agrees that nothing herein shall affect the right to effect
      service of process in any other manner permitted by law or shall limit the
      right to sue in any other jurisdiction.


                                       25
<PAGE>

            (b) THE BORROWER AND THE LIQUIDITY PROVIDER EACH HEREBY AGREE TO
WAIVE THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT AND THE RELATIONSHIP THAT IS
BEING ESTABLISHED, including, without limitation, contract claims, tort claims,
breach of duty claims and all other common law and statutory claims. The
Borrower and the Liquidity Provider each warrant and represent that it has
reviewed this waiver with its legal counsel, and that it knowingly and
voluntarily waives its jury trial rights following consultation with such legal
counsel. THIS WAIVER IS IRREVOCABLE, AND CANNOT BE MODIFIED EITHER ORALLY OR IN
WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS,
SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.

            Section 7.12 Execution in Counterparts. This Agreement may be
executed in any number of counterparts and by different parties hereto on
separate counterparts, each of which counterparts, when so executed and
delivered, shall be deemed to be an original and all of which counterparts,
taken together, shall constitute but one and the same Agreement.

            Section 7.13 Entirety. This Agreement, the Intercreditor Agreement
and the other Operative Agreements to which the Liquidity Provider is a party
constitute the entire agreement of the parties hereto with respect to the
subject matter hereof and supersedes all prior understandings and agreements of
such parties.

            Section 7.14 Headings. Section headings in this Agreement are
included herein for convenience of reference only and shall not constitute a
part of this Agreement for any other purpose.

            Section 7.15 LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES.
EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE OBLIGATIONS OF THE
LIQUIDITY PROVIDER TO MAKE ADVANCES HEREUNDER, AND THE BORROWER'S RIGHTS TO
DELIVER NOTICES OF BORROWING REQUESTING THE MAKING OF ADVANCES HEREUNDER, SHALL
BE UNCONDITIONAL AND IRREVOCABLE, AND SHALL BE PAID OR PERFORMED, IN EACH CASE
STRICTLY IN ACCORDANCE WITH THE TERMS OF THIS AGREEMENT.

                                  (End of Page)


                                       26
<PAGE>

            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed and delivered by their respective officers thereunto duly
authorized as of the date first set forth above.


                                   STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower

                                   By: /s/ Donald E. Smith
                                       -----------------------------------
                                       Name:  DONALD E. SMITH
                                       Title: VICE PRESIDENT


                                   CITIBANK, N.A., as Liquidity Provider

                                   By:
                                       -----------------------------------
                                       Name:
                                       Title:


                                       27
<PAGE>

            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed and delivered by their respective officers thereunto duly
authorized as of the date first set forth above.


                                   STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower

                                   By:
                                       -----------------------------------
                                       Name:
                                       Title:


                                   CITIBANK, N.A., as Liquidity Provider

                                   By: /s/ Thomas Boyle
                                       -----------------------------------
                                       Name:    THOMAS BOYLE
                                       Title: Managing Director
                                               Global Aviation
                                                 399P/12/2
                                              (212) 559-6149

                                       27
<PAGE>

                                                                      Annex I to
                                                      Revolving Credit Agreement

                      INTEREST ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2A) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of an Interest Advance by the Liquidity Provider to be used,
      subject to clause (3)(v) below, for the payment of the interest on the
      Class A Certificates which was payable on ____________, ____ (the
      "Distribution Date") in accordance with the terms and provisions of the
      Class A Trust Agreement and the Class A Certificates, which Advance is
      requested to be made on ____________, ____.

            (3) The amount of the Interest Advance requested hereby (i) is
      $_______________.__, to be applied in respect of the payment of the
      interest which was due and payable on the Class A Certificates on the
      Distribution Date, (ii) does not include any amount with respect to the
      payment of principal of, or premium on, the Class A Certificates, the
      Class B Certificates or the Class C Certificates, or interest on the Class
      B Certificates or the Class C Certificates, (iii) was computed in
      accordance with the provisions of the Certificates, the Class A Trust
      Agreement and the Intercreditor Agreement (a copy of which computation is
      attached hereto as Schedule I), (iv) does not exceed the Maximum Available
      Commitment on the date hereof, (v) does not include any amount of interest
      which was due and payable on the Class A Certificates on such Distribution
      Date but which remains unpaid due to the failure of the Depositary to pay
      any amount of accrued interest on the Deposits on such Distribution Date
      and (vi) has not been and is not the subject of a prior or contemporaneous
      Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will apply the same in accordance with
      the terms of Section 3.6(b) of the Intercreditor Agreement, (b) no portion
      of such amount shall be applied by the Borrower for any other purpose and
      (c) no portion of such amount until so applied shall be commingled with
      other funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, the making of the Interest Advance as requested by this Notice of
Borrowing shall automatically


                                       I-1
<PAGE>

reduce, subject to reinstatement in accordance with the terms of the Liquidity
Agreement, the Maximum Available Commitment by an amount equal to the amount of
the Interest Advance requested to be made hereby as set forth in clause (i) of
paragraph (3) of this Notice of Borrowing and such reduction shall automatically
result in corresponding reductions in the amounts available to be borrowed
pursuant to a subsequent Advance.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                        STATE STREET BANK AND TRUST
                                        COMPANY,
                                              not in its individual capacity but
                                              solely as Subordination Agent, as
                                              Borrower


                                        By:_____________________________________
                                           Name:
                                           Title:


                                      I-2

<PAGE>

               SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Interest Advance Notice of
Borrowing]


                                      I-3
<PAGE>

                                                                     Annex II to
                                                      Revolving Credit Agreement

                    NON-EXTENSION ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2A) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Non-Extension Advance by the Liquidity Provider to be used
      for the funding of the Class A Cash Collateral Account in accordance with
      Section 3.6(d) of the Intercreditor Agreement, which Advance is requested
      to be made on __________, ____.

            (3) The amount of the Non-Extension Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class A
      Cash Collateral Account in accordance with Section 3.6(d) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class A Certificates,
      or principal of, or interest or premium on, the Class B Certificates or
      the Class C Certificates, (iii) was computed in accordance with the
      provisions of the Class A Certificates, the Class A Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class A
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(d) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
      Agreement, (A) the making of the Non-Extension Advance as requested by
      this Notice of Borrowing shall automatically and irrevocably terminate the
      obligation of the Liquidity Provider to make further Advances under the
      Liquidity Agreement; and (B) following the making by the Liquidity
      Provider of the Non-Extension Advance requested by this Notice of


                                      II-1
<PAGE>

      Borrowing, the Borrower shall not be entitled to request any further
      Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                    STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower


                                   By:__________________________________________
                                      Name:
                                      Title:


                                      II-2
<PAGE>

             SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Non-Extension Advance Notice of
Borrowing]


                                      II-3
<PAGE>

                                                                    Annex III to
                                                      Revolving Credit Agreement

                      DOWNGRADE ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2A) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Downgrade Advance by the Liquidity Provider to be used for
      the funding of the Class A Cash Collateral Account in accordance with
      Section 3.6(c) of the Intercreditor Agreement by reason of the downgrading
      of the short-term unsecured debt rating of the Liquidity Provider issued
      by either Rating Agency below the Threshold Rating, which Advance is
      requested to be made on __________, ____.

            (3) The amount of the Downgrade Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class A
      Cash Collateral Account in accordance with Section 3.6(c) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class A Certificates,
      or principal of, or interest or premium on, the Class B Certificates or
      the Class C Certificates, (iii) was computed in accordance with the
      provisions of the Class A Certificates, the Class A Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class A
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(c) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Downgrade Advance as requested by this Notice
of Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity


                                     III-1
<PAGE>

Provider of the Downgrade Advance requested by this Notice of Borrowing, the
Borrower shall not be entitled to request any further Advances under the
Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                        STATE STREET BANK AND TRUST COMPANY,
                                             not in its individual capacity but
                                             solely as Subordination Agent, as
                                             Borrower


                                         By:____________________________________
                                            Name:
                                            Title:


                                     III-2
<PAGE>

               SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Downgrade Advance Notice of
Borrowing]


                                     III-3
<PAGE>

                                                                     Annex IV to
                                                      Revolving Credit Agreement

                        FINAL ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2A) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Final Advance by the Liquidity Provider to be used for the
      funding of the Class A Cash Collateral Account in accordance with Section
      3.6(i) of the Intercreditor Agreement by reason of the receipt by the
      Borrower of a Termination Notice from the Liquidity Provider with respect
      to the Liquidity Agreement, which Advance is requested to be made on
      ____________, ____.

            (3) The amount of the Final Advance requested hereby (i) is
      $_________________.__, which equals the Maximum Available Commitment on
      the date hereof and is to be applied in respect of the funding of the
      Class A Cash Collateral Account in accordance with Section 3.6(i) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of principal of, or premium on, the Class A Certificates, or
      principal of, or interest or premium on, the Class B Certificates or the
      Class C Certificates, (iii) was computed in accordance with the provisions
      of the Class A Certificates, the Class A Trust Agreement and the
      Intercreditor Agreement (a copy of which computation is attached hereto as
      Schedule I), and (iv) has not been and is not the subject of a prior or
      contemporaneous Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class A
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(i) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.


                                      IV-1
<PAGE>

            (5) The Borrower hereby requests that the Advance requested hereby
      be a Base Rate Advance [and that such Base Rate Advance be converted into
      a LIBOR Advance on the third Business Day following your receipt of this
      notice](1).

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Final Advance as requested by this Notice of
Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity Provider of the Final Advance
requested by this Notice of Borrowing, the Borrower shall not be entitled to
request any further Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                      STATE STREET BANK AND TRUST COMPANY,
                                            not in its individual capacity but
                                            solely as Subordination Agent, as
                                            Borrower


                                      By:_____________________________________
                                         Name:
                                         Title:

- ----------
(1)   Bracketed language may be included at Borrower's option.


                                      IV-2
<PAGE>

                 SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Final Advance Notice of
Borrowing]


                                      IV-3
<PAGE>

                                                                      Annex V to
                                                      Revolving Credit Agreement

                              NOTICE OF TERMINATION

                                                             [Date]

State Street Bank and Trust Company,
  as Subordination Agent, as Borrower
Two International Place, 4th Floor
Boston, MA 02110

Attention:  Corporate Trust Administration

      Revolving Credit Agreement (1999-2A) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            You are hereby notified that pursuant to Section 6.01 of the
Liquidity Agreement, by reason of the occurrence of a Liquidity Event of Default
and the existence of a Performing Note Deficiency (each as defined therein), we
are giving this notice to you in order to cause (i) our obligations to make
Advances (as defined therein) under such Liquidity Agreement to terminate on the
fifth Business Day after the date on which you receive this notice and (ii) you
to request a Final Advance under the Liquidity Agreement pursuant to Section
3.6(i) of the Intercreditor Agreement (as defined in the Liquidity Agreement) as
a consequence of your receipt of this notice.


                                      V-1
<PAGE>

            THIS NOTICE IS THE "NOTICE OF TERMINATION" PROVIDED FOR UNDER THE
LIQUIDITY AGREEMENT. OUR OBLIGATIONS TO MAKE ADVANCES UNDER THE LIQUIDITY
AGREEMENT WILL TERMINATE ON THE FIFTH BUSINESS DAY AFTER THE DATE ON WHICH YOU
RECEIVE THIS NOTICE.

                                 Very truly yours,

                                 CITIBANK, N.A.,  as Liquidity Provider


                                 By:____________________________________________
                                     Name:
                                     Title:

cc:   State Street Bank and Trust Company of
      Connecticut, National Association,
        as Class A Trustee


                                      V-2
<PAGE>

                                                                     Annex VI to
                                                      Revolving Credit Agreement

                    NOTICE OF REPLACEMENT SUBORDINATION AGENT

[Date]
Attention:

      Revolving Credit Agreement (1999-2A) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            For value received, the undersigned beneficiary hereby irrevocably
transfers to:

                         ______________________________
                              [Name of Transferee]

                         ______________________________
                             [Address of Transferee]

all rights and obligations of the undersigned as Borrower under the Liquidity
Agreement referred to above. The transferee has succeeded the undersigned as
Subordination Agent under the Intercreditor Agreement referred to in the first
paragraph of the Liquidity Agreement, pursuant to the terms of Section 8.1 of
the Intercreditor Agreement.

            By this transfer, all rights of the undersigned as Borrower under
the Liquidity Agreement are transferred to the transferee and the transferee
shall hereafter have the sole rights and obligations as Borrower thereunder. The
undersigned shall pay any costs and expenses of such transfer, including, but
not limited to, transfer taxes or governmental charges.


                                      VI-1
<PAGE>

            We ask that this transfer be effective as of _______________, ____.

                                    STATE STREET BANK AND TRUST
                                    COMPANY,
                                          not in its individual capacity but
                                          solely as Subordination Agent, as
                                          Borrower


                                    By:_____________________________________
                                       Name:
                                       Title:


                                      VI-2



                                                                  EXECUTION COPY

- --------------------------------------------------------------------------------

                           REVOLVING CREDIT AGREEMENT
                                    (1999-2B)

                            Dated as of June 25, 1999

                                     between

                       STATE STREET BANK AND TRUST COMPANY

                             as Subordination Agent,

                                   as Borrower

                                       and

                                 CITIBANK, N.A.

                              as Liquidity Provider

- --------------------------------------------------------------------------------

                                   Relating to

                  Northwest Airlines Pass Through Trust 1999-2B
              7.575% Northwest Airlines Pass Through Certificates,
                                 Series 1999-2B

<PAGE>

                               TABLE OF CONTENTS

                                                                            Page

ARTICLE I

      DEFINITIONS

      Section 1.01  Certain Defined Terms....................................1

ARTICLE II

      AMOUNT AND TERMS OF THE COMMITMENT

      Section 2.01  The Advances.............................................7
      Section 2.02  Making the Advances......................................7
      Section 2.03  Fees.....................................................9
      Section 2.04  Reduction or Termination of the Maximum Commitment.......9
      Section 2.05  Repayments of Interest Advances or the Final Advance....10
      Section 2.06  Repayments of Provider Advances.........................10
      Section 2.07  Payments to the Liquidity Provider Under the
                    Intercreditor Agreement ................................11
      Section 2.08  Book Entries............................................11
      Section 2.09  Payments from Available Funds Only......................12
      Section 2.10  Extension of the Expiry Date; Non-Extension Advance.....12

ARTICLE III

      OBLIGATIONS OF THE BORROWER

      Section 3.01  Increased Costs.........................................12
      Section 3.02  Capital Adequacy........................................13
      Section 3.03  Payments Free of Deductions.............................14
      Section 3.04  Payments................................................15
      Section 3.05  Computations............................................15
      Section 3.06  Payment on Non-Business Days............................15
      Section 3.07  Interest................................................15
      Section 3.08  Replacement of Borrower.................................17
      Section 3.09  Funding Loss Indemnification............................17
      Section 3.10  Illegality..............................................17

ARTICLE IV


                                       i
<PAGE>

                                                                            Page
                                                                            ----

      CONDITIONS PRECEDENT

      Section 4.01  Conditions Precedent to Effectiveness of Section 2.01...17
      Section 4.02  Conditions Precedent to Borrowing.......................19

ARTICLE V

      COVENANTS

      Section 5.01  Affirmative Covenants of the Borrower...................19
      Section 5.02  Negative Covenants of the Borrower......................20

ARTICLE VI

      LIQUIDITY EVENTS OF DEFAULT

      Section 6.01  Liquidity Events of Default.............................20

ARTICLE VII

      MISCELLANEOUS

      Section 7.01  Amendments, Etc.........................................21
      Section 7.02  Notices, Etc............................................21
      Section 7.03  No Waiver; Remedies.....................................22
      Section 7.04  Further Assurances......................................22
      Section 7.05  Indemnification; Survival of Certain Provisions.........22
      Section 7.06  Liability of the Liquidity Provider.....................22
      Section 7.07  Costs, Expenses and Taxes...............................23
      Section 7.08  Binding Effect; Participations..........................23
      Section 7.09  Severability............................................25
      Section 7.10  GOVERNING LAW...........................................25
      Section 7.11  Submission to Jurisdiction; Waiver of Jury Trial;
                    Waiver of Immunity .....................................25
      Section 7.12  Execution in Counterparts...............................26
      Section 7.13  Entirety................................................26
      Section 7.14  Headings................................................26
      Section 7.15  LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES........26


                                       ii

<PAGE>

ANNEXES

ANNEX I    Interest Advance Notice of Borrowing
ANNEX II   Non-Extension Advance Notice of Borrowing
ANNEX III  Downgrade Advance Notice of Borrowing
ANNEX IV   Final Advance Notice of Borrowing
ANNEX V    Notice of Termination
ANNEX VI   Notice of Replacement Subordination Agent


                                       iii

<PAGE>

                           REVOLVING CREDIT AGREEMENT

            This REVOLVING CREDIT AGREEMENT dated as of June 25, 1999, between
STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company, not in its
individual capacity but solely as Subordination Agent under the Intercreditor
Agreement (each as defined below), (the "Borrower"), and CITIBANK, N.A, a
national banking association organized under the laws of the United States (the
"Liquidity Provider").

                              W I T N E S S E T H:

            WHEREAS, pursuant to the Class B Trust Agreement (such term and all
other capitalized terms used in these recitals having the meanings set forth or
referred to in Section 1.01), the Class B Trust is issuing the Class B
Certificates; and

            WHEREAS, the Borrower, in order to support the timely payment of a
portion of the interest on the Class B Certificates in accordance with their
terms, has requested the Liquidity Provider to enter into this Agreement,
providing in part for the Borrower to request in specified circumstances that
Advances be made hereunder.

            NOW, THEREFORE, in consideration of the premises, the parties hereto
agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

            Section 1.01 Certain Defined Terms. (a) Definitions. As used in this
Agreement and unless otherwise expressly indicated, or unless the context
clearly requires otherwise, the following capitalized terms shall have the
following respective meanings for all purposes of this Agreement:

            "Advance" means an Interest Advance, a Final Advance, a Provider
      Advance, an Applied Provider Advance or an Unpaid Advance, as the case may
      be.

            "Applicable Liquidity Rate" has the meaning assigned to such term in
      Section 3.07(g).

            "Applicable Margin" means with respect to any Unpaid Advance or
      Applied Provider Advance, 2.0%.

            "Applied Downgrade Advance" has the meaning assigned to such term in
      Section 2.06(a).

<PAGE>

            "Applied Non-Extension Advance" has the meaning assigned to such
      term in Section 2.06(a).

            "Applied Provider Advance" has the meaning assigned to such term in
      Section 2.06(a).

            "Base Rate"means a fluctuating interest rate per annum in effect
      from time to time, which rate per annum is at all times equal to (a) the
      weighted average of the rates on overnight Federal funds transactions with
      members of the Federal Reserve System arranged by Federal funds brokers,
      as published for such day (or, if such day is not a Business Day, for the
      next preceding Business Day) by the Federal Reserve Bank of New York, or
      if such rate is not so published for any day that is a Business Day, the
      average of the quotations for such day for such transactions received by
      the Liquidity Provider from three Federal funds brokers of recognized
      standing selected by the Liquidity Provider, plus (b) one quarter of one
      percent (0.25%) per annum.

            "Base Rate Advance" means an Advance that bears interest at a rate
      based upon the Base Rate.

            "Borrower" has the meaning assigned to such term in the recital of
      parties to this Agreement.

            "Borrowing" means the making of Advances requested by delivery of a
      Notice of Borrowing.

            "Business Day" means any day other than a Saturday or Sunday or a
      day on which commercial banks are required or authorized to close in New
      York, New York, Minneapolis, Minnesota, Chicago, Illinois, Boston,
      Massachusetts and Salt Lake City, Utah, or, so long as any Class B
      Certificate is outstanding, the city and state in which the Class B
      Trustee, the Borrower or any Loan Trustee maintains its Corporate Trust
      Office or receives or disburses funds, and, if the applicable Business Day
      relates to any Advance or other amount bearing interest based on the LIBOR
      Rate, on which dealings are carried on in the London interbank market.

            "Delivery Period" means the period from the date hereof through May
      31, 2000.

            "Deposit Agreement" means the Deposit Agreement, dated June 25,
      1999, between First Security Bank, National Association, as Escrow Agent
      and ABN AMRO Bank N.V., acting through its Chicago Branch, as Depositary,
      pertaining to the Class B Certificates, as the same may be amended,
      modified or supplemented from time to time in accordance with the terms
      thereof.

            "Depositary" has the meaning assigned to such term in the Deposit
      Agreement.


                                       2
<PAGE>

            "Deposits" has the meaning assigned to such terms in the Deposit
      Agreement.

            "Downgrade Advance" means an Advance made pursuant to Section
      2.02(c).

            "Effective Date" has the meaning specified in Section 4.01. The
      delivery of the certificate of the Liquidity Provider contemplated by
      Section 4.01(e) shall be conclusive evidence that the Effective Date has
      occurred.

            "Excluded Taxes" means (i) Taxes imposed on the overall net income
      of the Liquidity Provider and (ii) Excluded Withholding Taxes.

            "Excluded Withholding Taxes" means (i) withholding Taxes imposed by
      the United States except to the extent that such United States withholding
      Taxes are imposed as a result of any change in applicable law (excluding
      from "change in applicable law" for this purpose, a change in an
      applicable treaty or other change in law affecting the applicability of a
      treaty) after the date hereof, or in the case of a successor Liquidity
      Provider (including a transferee of an Advance) or Lending Office, after
      the date on which such successor Liquidity Provider obtains its interest
      or on which the Lending Office is changed, and (ii) any withholding Taxes
      imposed by the United States which are imposed or increased as a result of
      the Liquidity Provider failing to deliver to the Borrower any certificate
      or document (which certificate or document in the good faith judgment of
      the Liquidity Provider it is legally entitled to provide) which is
      reasonably requested by the Borrower to establish that payments under this
      Agreement are exempt from (or entitled to a reduced rate of) withholding
      Tax.

            "Expenses" means liabilities, obligations, damages, settlements,
      penalties, claims, actions, suits, costs, expenses, and disbursements
      (including, without limitation, reasonable fees and disbursements of legal
      counsel and costs of investigation), provided that Expenses shall not
      include any Taxes.

            "Expiry Date" means June 14, 2000, initially, or any date to which
      the Expiry Date is extended pursuant to Section 2.10.

            "Final Advance" means an Advance made pursuant to Section 2.02(d).

            "Intercreditor Agreement" means the Intercreditor Agreement dated
      the date hereof, among the Trustees, the Liquidity Provider, the liquidity
      provider under each Liquidity Facility (other than this Agreement) and the
      Subordination Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            "Interest Advance" means an Advance made pursuant to Section
      2.02(a).


                                       3
<PAGE>

            "Interest Period" means, with respect to any LIBOR Advance, each of
      the following periods:

            (i)   the period beginning either (x) on the date such LIBOR Advance
                  is made (or is converted from a Base Rate Advance) or (y) the
                  date of the withdrawal of funds from the Class B Cash
                  Collateral Account for the purpose of paying interest on the
                  Class B Certificates as contemplated by Section 2.06(a) hereof
                  and, in each case, ending on the next Regular Distribution
                  Date; and

            (ii)  each subsequent period commencing on the last day of the
                  immediately preceding Interest Period and ending on the next
                  Regular Distribution Date;

      provided, however, that if (x) the Final Advance shall have been made, or
      (y) other outstanding Advances shall have been converted into the Final
      Advance, then the Interest Periods shall be successive periods of one
      month beginning on the date such Final Advance is made (in the case of
      clause (x) above) or the Regular Distribution Date following such
      conversion (in the case of clause (y) above).

            "Lending Office" means the lending office of the Liquidity Provider
      presently located in New York, New York, or such other lending office as
      the Liquidity Provider from time to time shall notify the Borrower as its
      lending office hereunder.

            "LIBOR Advance" means an Advance bearing interest at a rate based
      upon the LIBOR Rate.

            "LIBOR Rate" means, with respect to any Interest Period, (i) the
      rate per annum appearing on display page 3750 (British Bankers
      Association--LIBOR) of the Dow Jones Markets Service (or any successor or
      substitute therefor) at approximately 11:00 A.M. (London time) two
      Business Days before the first day of such Interest Period, as the rate
      for dollar deposits with a maturity comparable to such Interest Period, or
      (ii) if the rate calculated pursuant to clause (i) above is not available,
      the average (rounded upwards, if necessary, to the next 1/16 of 1%) of the
      rates per annum at which deposits in dollars are offered for the relevant
      Interest Period by three banks of recognized standing selected by the
      Liquidity Provider in the London interbank market at approximately 11:00
      A.M. (London time) two business days before the first day of such Interest
      Period in an amount approximately equal to the principal amount of the
      LIBOR Advance to which such Interest Period is to apply and for a period
      comparable to such Interest Period.

            "Liquidity Event of Default" means the occurrence of the following:
      (i) all of the Equipment Notes shall have been either declared to be
      immediately due and payable or shall not have been paid at their final
      maturity; provided that, if an acceleration of the Equipment Notes occurs
      during the Delivery Period, a Liquidity Event of Default shall


                                       4
<PAGE>

      occur only if the aggregate principal amount of the Equipment Notes
      exceeds $300 million, or (ii) a Northwest Bankruptcy Event.

            "Liquidity Indemnitee" means (i) the Liquidity Provider, (ii) the
      directors, officers, employees and agents of the Liquidity Provider, and
      (iii) the successors and permitted assigns of the persons described in
      clauses (i) and (ii), inclusive.

            "Liquidity Provider" has the meaning assigned to such term in the
      recital of parties to this Agreement.

            "Maximum Available Commitment" shall mean, subject to the proviso
      contained in the third sentence of Section 2.02(a), at any time of
      determination, (a) the Maximum Commitment at such time less (b) the
      aggregate amount of each Interest Advance outstanding at such time;
      provided that following a Provider Advance or a Final Advance, the Maximum
      Available Commitment shall be zero.

            "Maximum Commitment" means, for any day, the lesser of (x)
      $13,100,566.50 and (y) the Required Amount on such day.

            "Non-Excluded Tax" has the meaning specified in Section 3.03(a).

            "Non-Extension Advance" means an Advance made pursuant to Section
      2.02(b).

            "Notice of Borrowing" has the meaning specified in Section 2.02(e).

            "Notice of Replacement Subordination Agent" has the meaning
      specified in Section 3.08.

            "Performing Note Deficiency" means any time that less than 65% of
      the then aggregate outstanding principal amount of all Equipment Notes are
      Performing Equipment Notes.

            "Prospectus Supplement" means the Prospectus Supplement dated June
      18, 1999, relating to the Class A Certificates, the Class B Certificates
      and the Class C Certificates, as such Prospectus Supplement may be amended
      or supplemented.

            "Provider Advance" means a Downgrade Advance or a Non-Extension
      Advance.

            "Replenishment Amount" has the meaning assigned to such term in
      Section 2.06(b).

            "Required Amount" means, for any day, the sum of the aggregate
      amount of interest, calculated at the rate per annum equal to the Stated
      Interest Rate for the Class B Certificates, that would be payable on the
      Class B Certificates on each of the three


                                       5
<PAGE>

      successive semiannual Regular Distribution Dates immediately following
      such day or, if such day is a Regular Distribution Date, on such day and
      the succeeding two semiannual Regular Distribution Dates, in each case
      calculated on the basis of the Pool Balance of the Class B Certificates on
      such day and without regard to expected future payments of principal on
      the Class B Certificates.

            "Termination Date" means the earliest to occur of the following: (i)
      the Expiry Date; (ii) the date on which the Borrower delivers to the
      Liquidity Provider a certificate, signed by a Responsible Officer of the
      Borrower, certifying that all of the Class B Certificates have been paid
      in full (or provision has been made for such payment in accordance with
      the Intercreditor Agreement and the Trust Agreements) or are otherwise no
      longer entitled to the benefits of this Agreement; (iii) the date on which
      the Borrower delivers to the Liquidity Provider a certificate, signed by a
      Responsible Officer of the Borrower, certifying that a Replacement
      Liquidity Facility has been substituted for this Agreement in full
      pursuant to Section 3.6(e) of the Intercreditor Agreement; (iv) the fifth
      Business Day following the receipt by the Borrower of a Termination Notice
      from the Liquidity Provider pursuant to Section 6.01 hereof; and (v) the
      date on which no Advance is or may (including by reason of reinstatement
      as herein provided) become available for a Borrowing hereunder.

            "Termination Notice" means the Notice of Termination substantially
      in the form of Annex V to this Agreement.

            "Transferee" has the meaning assigned to such term in Section
      7.08(b).

            "Unapplied Downgrade Advance" means any Downgrade Advance other than
      an Applied Downgrade Advance.

            "Unapplied Provider Advance" means any Provider Advance other than
      an Applied Provider Advance.

            "Unpaid Advance" has the meaning assigned to such term in Section
      2.05.

            (b) Terms Defined in the Intercreditor Agreement. For all purposes
of this Agreement, the following terms shall have the respective meanings
assigned to such terms in the Intercreditor Agreement:

      "Acceleration", "Certificates", "Class A Certificates", "Class B Cash
      Collateral Account", "Class B Certificateholders", "Class B Certificates",
      "Class B Trust", "Class B Trust Agreement", "Class B Trustee", "Class C
      Certificates", "Closing Date", "Controlling Party", "Corporate Trust
      Office", "Delivery Period Expiry Date", "Distribution Date", "Downgraded
      Facility", "Equipment Notes", "Final Legal Distribution Date", "Financing
      Agreement", "Indenture", "Interest Payment Date", "Investment Earnings",
      "Liquidity Facility", "Liquidity Obligations", "Loan Trustee",


                                       6
<PAGE>

      "Moody's", "Non-Extended Facility", "Northwest", "Northwest Bankruptcy
      Event", "Note Purchase Agreement", "Operative Agreements", "Performing
      Equipment Note", "Person", "Pool Balance", "Rating Agency", "Ratings
      Confirmation", "Regular Distribution Date", "Replacement Liquidity
      Facility", "Responsible Officer", "Scheduled Payment", "Special Payment",
      "Standard & Poor's", "Stated Interest Rate", "Subordination Agent",
      "Taxes", "Threshold Rating", "Trust Agreements", "Trustee",
      "Underwriters", "Underwriting Agreement" and "Written Notice".

                                   ARTICLE II

                       AMOUNT AND TERMS OF THE COMMITMENT

            Section 2.01 The Advances. The Liquidity Provider hereby irrevocably
agrees, on the terms and conditions hereinafter set forth, to make Advances to
the Borrower from time to time on any Business Day during the period from the
Effective Date until 12:00 Noon (New York City time) on the Expiry Date (unless
the obligations of the Liquidity Provider shall be earlier terminated in
accordance with the terms of Section 2.04(b)) in an aggregate amount at any time
outstanding not to exceed the Maximum Commitment.

            Section 2.02 Making the Advances. (a) Interest Advances shall be
made in one or more Borrowings by delivery to the Liquidity Provider of one or
more written and completed Notices of Borrowing in substantially the form of
Annex I attached hereto, signed by a Responsible Officer of the Borrower, in an
amount not exceeding the Maximum Available Commitment at such time and shall be
used solely for the payment when due of interest on the Class B Certificates at
the Stated Interest Rate therefor in accordance with Section 3.6(a) of the
Intercreditor Agreement. Each Interest Advance made hereunder shall
automatically reduce the Maximum Available Commitment and the amount available
to be borrowed hereunder by subsequent Advances by the amount of such Interest
Advance (subject to reinstatement as provided in the next sentence). Upon
repayment to the Liquidity Provider in full of the amount of any Interest
Advance made pursuant to this Section 2.02(a), together with accrued interest
thereon (as provided herein), the Maximum Available Commitment shall be
reinstated by the amount of such repaid Interest Advance, but not to exceed the
Maximum Commitment; provided, however, that the Maximum Available Commitment
shall not be so reinstated at any time if (i) a Liquidity Event of Default shall
have occurred and be continuing and (ii) there is a Performing Note Deficiency.

            (b) A Non-Extension Advance shall be made in a single Borrowing if
this Agreement is not extended in accordance with Section 3.6(d) of the
Intercreditor Agreement (unless a Replacement Liquidity Facility to replace this
Agreement shall have been delivered to the Borrower as contemplated by said
Section 3.6(d) within the time period specified in such Section) by delivery to
the Liquidity Provider of a written and completed Notice of Borrowing in
substantially the form of Annex II attached hereto, signed by a Responsible
Officer of the Borrower, in an amount equal to the Maximum Available Commitment
at such time, and shall be


                                       7
<PAGE>

used to fund the Class B Cash Collateral Account in accordance with said Section
3.6(d) and Section 3.6(f) of the Intercreditor Agreement.

            (c) A Downgrade Advance shall be made in a single Borrowing upon a
downgrading of the Liquidity Provider's short-term unsecured debt rating issued
by either Rating Agency below the applicable Threshold Rating (as provided for
in Section 3.6(c) of the Intercreditor Agreement) unless a Replacement Liquidity
Facility to replace this Agreement shall have been previously delivered to the
Borrower in accordance with said Section 3.6(c), by delivery to the Liquidity
Provider of a written and completed Notice of Borrowing in substantially the
form of Annex III attached hereto, signed by a Responsible Officer of the
Borrower, in an amount equal to the Maximum Available Commitment at such time,
and shall be used to fund the Class B Cash Collateral Account in accordance with
said Section 3.6(c) and Section 3.6(f) of the Intercreditor Agreement.

            (d) A Final Advance shall be made in a single Borrowing upon the
receipt by the Borrower of a Termination Notice from the Liquidity Provider
pursuant to Section 6.01 hereof by delivery to the Liquidity Provider of a
written and completed Notice of Borrowing in substantially the form of Annex IV
attached hereto, signed by a Responsible Officer of the Borrower, in an amount
equal to the Maximum Available Commitment at such time, and shall be used to
fund the Class B Cash Collateral Account in accordance with Section 3.6(i) and
Section 3.6(f) of the Intercreditor Agreement.

            (e) Each Borrowing shall be made on notice in writing (a "Notice of
Borrowing") in substantially the form required by Section 2.02(a), 2.02(b),
2.02(c) or 2.02(d), as the case may be, given by the Borrower to the Liquidity
Provider. If a Notice of Borrowing is delivered by the Borrower in respect of
any Borrowing no later than 1:00 p.m. (New York City time) on a Business Day,
upon satisfaction of the conditions precedent set forth in Section 4.02 with
respect to a requested Borrowing, the Liquidity Provider shall make available to
the Borrower, in accordance with its payment instructions, the amount of such
Borrowing in U.S. dollars and immediately available funds, before 4:00 p.m. (New
York City time) on such Business Day or on such later Business Day specified in
such Notice of Borrowing. If a Notice of Borrowing is delivered by the Borrower
in respect of any Borrowing after 1:00 p.m. (New York City time) on a Business
Day, upon satisfaction of the conditions precedent set forth in Section 4.02
with respect to a requested Borrowing, the Liquidity Provider shall make
available to the Borrower, in accordance with its payment instructions, the
amount of such Borrowing in U.S. dollars and immediately available funds, before
12:00 Noon (New York City time) on the first Business Day next following the day
of receipt of such Notice of Borrowing or on such later Business Day specified
by the Borrower in such Notice of Borrowing. Payments of proceeds of a Borrowing
shall be made by wire transfer of immediately available funds to the Borrower in
accordance with such wire transfer instructions as the Borrower shall furnish
from time to time to the Liquidity Provider for such purpose. Each Notice of
Borrowing shall be irrevocable and binding on the Borrower.


                                       8
<PAGE>

            (f) Upon the making of any Advance requested pursuant to a Notice of
Borrowing, in accordance with the Borrower's payment instructions, the Liquidity
Provider shall be fully discharged of its obligation hereunder with respect to
such Notice of Borrowing, and the Liquidity Provider shall not thereafter be
obligated to make any further Advances hereunder in respect of such Notice of
Borrowing to the Borrower or to any other Person. Following the making of any
Advance pursuant to Section 2.02(b), (c) or (d) hereof to fund the Class B Cash
Collateral Account, the Liquidity Provider shall have no interest in or rights
to the Class B Cash Collateral Account, such Advance or any other amounts from
time to time on deposit in the Class B Cash Collateral Account; provided that
the foregoing shall not affect or impair the obligations of the Subordination
Agent to make the distributions contemplated by Section 3.6(e) or (f) of the
Intercreditor Agreement. By paying to the Borrower proceeds of Advances
requested by the Borrower in accordance with the provisions of this Agreement,
the Liquidity Provider makes no representation as to, and assumes no
responsibility for, the correctness or sufficiency for any purpose of the amount
of the Advances so made and requested.

            Section 2.03 Fees. (a) The Borrower agrees to pay to the Liquidity
Provider on the effective date a non-refundable fee equal to $226,880.91 in
aggregate with respect to this Agreement, the Revolving Credit Agreement
(1999-2B) dated as of June 25, 1999, by and between State Street Bank and Trust
Company and Citibank, N.A., and the Revolving Credit Agreement (1999-2C) dated
as of June 25, 1999, by and between State Street Bank and Trust Company and
Citibank, N.A.

            (b) The Borrower shall pay, or shall cause to be paid, to the
Liquidity Provider, a fee equal to 0.35% per annum on the average Maximum
Available Commitment from the Effective Date to the earlier of the date on which
a Downgrade Advance or Non-Extension Advance is made and the date on which the
Maximum Commitment terminates. Such fee shall be payable in arrears on each
Regular Distribution Date. In addition, the Borrower shall pay, or shall cause
to be paid, to the Liquidity Provider, a fee equal to 0.35% per annum on the
unpaid principal amount of each Downgrade Advance or Non-Extension Advance
(other than an Applied Downgrade Advance or an Applied Non-Extension Advance)
from and including the date of such Advance to but excluding the date such
principal amount shall be paid in full. Such fee shall be payable in arrears on
each Regular Distribution Date and, in the event of the payment of principal of
such Downgrade Advance or Non-Extension Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of the foregoing
fee accrued on the amount of principal repaid). Nothing contained in this
Section 2.03(b) shall require the Borrower to pay any amount under this Section
2.03(b) other than to the extent the Borrower shall have funds available
therefor, and, in all events, subject to the terms of the Intercreditor
Agreement.

            Section 2.04 Reduction or Termination of the Maximum Commitment.

            (a) Automatic Reduction. Promptly following each date on which the
Required Amount is reduced as a result of a reduction in the Pool Balance of the
Class B Certificates or otherwise, the Maximum Commitment shall automatically be
reduced to an amount equal to such


                                       9
<PAGE>

reduced Required Amount (as calculated by the Borrower). The Borrower shall give
notice of any such automatic reduction of the Maximum Commitment to the
Liquidity Provider within two Business Days thereof. The failure by the Borrower
to furnish any such notice shall not affect such automatic reduction of the
Maximum Commitment.

            (b) Termination. Upon the making of any Provider Advance or Final
Advance hereunder or the occurrence of the Termination Date, the obligation of
the Liquidity Provider to make further Advances hereunder shall automatically
and irrevocably terminate, and the Borrower shall not be entitled to request any
further Borrowing hereunder.

            Section 2.05 Repayments of Interest Advances or the Final Advance.
Subject to Sections 2.06, 2.07 and 2.09 hereof, the Borrower hereby agrees,
without notice of an Advance or demand for repayment from the Liquidity Provider
(which notice and demand are hereby waived by the Borrower), to pay, or to cause
to be paid, to the Liquidity Provider on each date on which the Liquidity
Provider shall make an Interest Advance or the Final Advance, an amount equal to
(a) the amount of such Advance (any such Advance, until repaid, is referred to
herein as an "Unpaid Advance"), plus (b) interest on the amount of each such
Unpaid Advance as provided in Section 3.07 hereof; provided that if (i) the
Liquidity Provider shall make a Provider Advance at any time after making one or
more Interest Advances which shall not have been repaid in accordance with this
Section 2.05 or (ii) this Liquidity Facility shall become a Downgraded Facility
or Non-Extended Facility at any time when unreimbursed Interest Advances have
reduced the Maximum Available Commitment to zero, then such Interest Advances
shall cease to constitute Unpaid Advances and shall be deemed to have been
changed into an Applied Downgrade Advance or an Applied Non-Extension Advance,
as the case may be, for all purposes of this Agreement (including, without
limitation, for the purpose of determining when such Interest Advance is
required to be repaid to the Liquidity Provider in accordance with Section 2.06
and for the purposes of Section 2.06(b)). The Borrower and the Liquidity
Provider agree that the repayment in full of each Interest Advance and Final
Advance on the date such Advance is made is intended to be a contemporaneous
exchange for new value given to the Borrower by the Liquidity Provider.

            Section 2.06 Repayments of Provider Advances. (a) Amounts advanced
hereunder in respect of a Provider Advance shall be deposited in the Class B
Cash Collateral Account, invested and withdrawn from the Class B Cash Collateral
Account as set forth in Sections 3.6(c), (d) and (f) of the Intercreditor
Agreement. The Borrower agrees to pay to the Liquidity Provider, on each Regular
Distribution Date, commencing on the first Regular Distribution Date after the
making of a Provider Advance, interest on the principal amount of any such
Provider Advance as provided in Section 3.07; provided, however, that amounts in
respect of a Provider Advance withdrawn from the Class B Cash Collateral Account
for the purpose of paying interest on the Class B Certificates in accordance
with Section 3.6(f) of the Intercreditor Agreement (the amount of any such
withdrawal being (y) in the case of a Downgrade Advance, an "Applied Downgrade
Advance" and (z) in the case of a Non-Extension Advance, an "Applied
Non-Extension Advance" and, together with an Applied Downgrade Advance, an
"Applied Provider Advance") shall thereafter (subject to Section 2.06(b)) be
treated as an Interest Advance


                                       10
<PAGE>

under this Agreement for purposes of determining the Applicable Liquidity Rate
for interest payable thereon; provided further, however, that if, following the
making of a Provider Advance, the Liquidity Provider delivers a Termination
Notice to the Borrower pursuant to Section 6.01 hereof, such Provider Advance
shall thereafter be treated as a Final Advance under this Agreement for purposes
of determining the Applicable Liquidity Rate for interest payable thereon.
Subject to Sections 2.07 and 2.09 hereof, immediately upon the withdrawal of any
amounts from the Class B Cash Collateral Account on account of a reduction in
the Required Amount, the Borrower shall repay to the Liquidity Provider a
portion of the Provider Advances in a principal amount equal to such reduction,
plus interest on the principal amount prepaid as provided in Section 3.07
hereof.

            (b) At any time when an Applied Provider Advance (or any portion
thereof) is outstanding, upon the deposit in the Class B Cash Collateral Account
of any amount pursuant to clause "third" of Section 2.4(b) of the Intercreditor
Agreement, clause "third" of Section 3.2 of the Intercreditor Agreement or
clause "fourth" of Section 3.3 of the Intercreditor Agreement (any such amount
being a "Replenishment Amount") for the purpose of replenishing or increasing
the balance thereof up to the Required Amount at such time, (i) the aggregate
outstanding principal amount of all Applied Provider Advances (and of Provider
Advances treated as an Interest Advance for purposes of determining the
Applicable Liquidity Rate for interest payable thereon) shall be automatically
reduced by the amount of such Replenishment Amount and (ii) the aggregate
outstanding principal amount of all Unapplied Provider Advances shall be
automatically increased by the amount of such Replenishment Amount.

            (c) Upon the provision of a Replacement Liquidity Facility in
replacement of this Agreement in accordance with Section 3.6(e) of the
Intercreditor Agreement, amounts remaining on deposit in the Class B Cash
Collateral Account after giving effect to any Applied Provider Advance on the
date of such replacement shall be reimbursed to the Liquidity Provider, but only
to the extent such amounts are necessary to repay in full to the Liquidity
Provider all amounts owing to it hereunder.

            Section 2.07 Payments to the Liquidity Provider Under the
Intercreditor Agreement. In order to provide for payment or repayment to the
Liquidity Provider of any amounts hereunder, the Intercreditor Agreement
provides that amounts available and referred to in Articles II and III of the
Intercreditor Agreement, to the extent payable to the Liquidity Provider
pursuant to the terms of the Intercreditor Agreement (including, without
limitation, Section 3.6(f) of the Intercreditor Agreement), shall be paid to the
Liquidity Provider in accordance with the terms thereof. Amounts so paid to the
Liquidity Provider shall be applied by the Liquidity Provider to Liquidity
Obligations then due and payable in accordance with the Intercreditor Agreement
or, if not provided for in the Intercreditor Agreement, then in such manner as
the Liquidity Provider shall deem appropriate.

            Section 2.08 Book Entries. The Liquidity Provider shall maintain in
accordance with its usual practice an account or accounts evidencing the
indebtedness of the Borrower resulting from Advances made from time to time and
the amounts of principal and interest


                                       11
<PAGE>

payable hereunder and paid from time to time in respect thereof; provided,
however, that the failure by the Liquidity Provider to maintain such account or
accounts shall not affect the obligations of the Borrower in respect of
Advances.

            Section 2.09 Payments from Available Funds Only. All payments to be
made by the Borrower under this Agreement shall be made only from the amounts
that constitute Scheduled Payments, Special Payments or payments under Section
7(c) of the Participation Agreements and Section 7 of the Note Purchase
Agreement and only to the extent that the Borrower shall have sufficient income
or proceeds therefrom to enable the Borrower to make payments in accordance with
the terms hereof after giving effect to the priority of payments provisions set
forth in the Intercreditor Agreement. The Liquidity Provider agrees that it will
look solely to such amounts to the extent available for distribution to it as
provided in the Intercreditor Agreement and this Agreement and that the
Borrower, in its individual capacity, is not personally liable to it for any
amounts payable or liability under this Agreement except as expressly provided
in this Agreement, the Intercreditor Agreement or any Participation Agreement.
Amounts on deposit in the Class B Cash Collateral Account shall be available to
the Borrower to make payments under this Agreement only to the extent and for
the purposes expressly contemplated in Section 3.6(f) of the Intercreditor
Agreement.

            Section 2.10 Extension of the Expiry Date; Non-Extension Advance. No
earlier than the 60th day and no later than the 40th day prior to the then
effective Expiry Date (unless such Expiry Date is on or after the date that is
15 days after the Final Legal Distribution Date for the Class B Certificates),
the Borrower shall request that the Liquidity Provider extend the Expiry Date
for a period of 364 days after the then effective Expiry Date (unless the
obligations of the Liquidity Provider are earlier terminated in accordance with
the terms hereof). The Liquidity Provider shall advise the Borrower, no earlier
than 40 days and no later than 25 days prior to the then effective Expiry Date,
whether, in its sole discretion, it agrees to so extend the Expiry Date. If the
Liquidity Provider advises the Borrower on or before the 25th day prior to the
Expiry Date then in effect that such Expiry Date shall not be so extended, or
fails to irrevocably and unconditionally advise the Borrower on or before the
25th day prior to the Expiry Date then in effect that such Expiry Date shall be
so extended (and, in each case, if the Liquidity Provider shall not have been
replaced in accordance with Section 3.6(e) of the Intercreditor Agreement), the
Borrower shall be entitled on and after such 25th day (but prior to the then
effective Expiry Date) to request a Non-Extension Advance in accordance with
Section 2.02(b) hereof and Section 3.6(d) of the Intercreditor Agreement.

                                   ARTICLE III

                           OBLIGATIONS OF THE BORROWER

            Section 3.01 Increased Costs. If the Liquidity Provider shall
determine that (a) any change after the date hereof in any law, regulation, rule
or directive or in the interpretation thereof by any court or administrative or
governmental authority charged with the administration thereof or in the
compliance by the Liquidity Provider (or its head office) with any applicable


                                       12
<PAGE>

direction, request or requirement (whether or not having the force of law) of
any central bank or competent governmental or other authority shall either (i)
impose, modify or deem applicable any reserve, special deposit or similar
requirement against assets held by, or deposits in or for the account of, or
loans made by, the Liquidity Provider, or (ii) impose on the Liquidity Provider
any other condition regarding this Agreement or any Advance, or (iii) subject
the Liquidity Provider to any Taxes with respect to amounts payable or paid or
change the basis of taxation of any amounts payable to the Liquidity Provider
(other than Excluded Taxes) and (b) the result of any event referred to in the
preceding clauses (i), (ii) or (iii) shall be to increase the cost to the
Liquidity Provider of issuing or maintaining its commitment or funding or
maintaining Advances (which increase in cost shall be determined by the
Liquidity Provider's reasonable allocations of the aggregate of such cost
increases resulting from such event), then, upon demand by the Liquidity
Provider (such demand to be made not later than 180 days after a Responsible
Officer of the Liquidity Provider obtains actual knowledge of any event referred
to in clause (i), (ii) or (iii) above), the Borrower shall pay, or cause to be
paid, to the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such increased cost; provided that if such demand for
payment is made after such 180-day period, the Borrower shall be obligated to
pay such additional amounts only with respect to such increased cost actually
incurred or effected on or after the 180th day prior to the date of such demand.
A certificate as to such increased cost incurred by the Liquidity Provider as a
result of any event mentioned in clauses (i), (ii) or (iii) above, prepared in
reasonable detail and submitted by the Liquidity Provider to the Borrower, shall
be conclusive evidence of the amount owed under this Section, absent manifest
error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.01 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.02 Capital Adequacy. If the Liquidity Provider shall
determine that the adoption of any applicable law, rule or regulation regarding
capital adequacy, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by the Liquidity Provider (or its head office) with any request or directive
regarding capital adequacy (whether or not having the force of law) of any such
authority, central bank or comparable agency, in each case after the date
hereof, has the effect of reducing the rate of return on the Liquidity
Provider's capital as a consequence of issuing or maintaining its commitment
hereunder or its funding or maintaining Advances to a level below that which the
Liquidity Provider could have achieved but for such adoption, change or
compliance (taking into consideration the Liquidity Provider's policies with
respect to capital adequacy) by an amount deemed by the Liquidity Provider to be
material, then, upon demand by the Liquidity Provider, the Borrower shall pay to
the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such reduction in respect of issuing or maintaining its
commitment hereunder or its funding or


                                       13
<PAGE>

maintaining Advances. A certificate as to any such additional amount describing
the event which has the effect of reducing the rate of return on the Liquidity
Provider's capital, prepared in reasonable detail and submitted by the Liquidity
Provider to the Borrower, shall be conclusive evidence of the amount owed under
this Section, absent manifest error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.02 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.03 Payments Free of Deductions. (a) All payments made by
the Borrower under this Agreement shall be made free and clear of, and without
reduction for or on account of, any present or future stamp or other taxes,
levies, imposts, duties, charges, fees, deductions, withholdings, restrictions
or conditions of any nature whatsoever now or hereafter imposed, levied,
collected, withheld or assessed, excluding Excluded Taxes (such non-excluded
taxes being referred to herein, collectively, as "Non-Excluded Taxes" and,
individually, as a "Non-Excluded Tax"). If any Non-Excluded Taxes are required
to be withheld from any amounts payable to the Liquidity Provider under this
Agreement, the amounts so payable to the Liquidity Provider shall be increased
to the extent necessary to yield to the Liquidity Provider (after payment of all
Non-Excluded Taxes and taxes imposed on the receipt of such increase) interest
or any other such amounts payable under this Agreement at the rates or in the
amounts specified in this Agreement. The Liquidity Provider agrees to use
reasonable efforts (consistent with its internal policy and legal and regulatory
restrictions) to change the jurisdiction of its Lending Office if making such
change would avoid the need for, or reduce the amount of, any such additional
amounts that may thereafter accrue and would not, in the reasonable judgment of
the Liquidity Provider, be otherwise disadvantageous to the Liquidity Provider.
From time to time upon the reasonable request of the Borrower, the Liquidity
Provider agrees to provide to the Borrower, to the extent that the Liquidity
Provider is legally entitled to do so, two original Internal Revenue Service
Forms 1001 or 4224, as appropriate, or any successor or other form prescribed by
the Internal Revenue Service, certifying that the Liquidity Provider is exempt
from or entitled to a reduced rate of United States withholding tax on payments
pursuant to this Agreement.

            (b) All payments (including, without limitation, Advances) made by
the Liquidity Provider under this Agreement shall be made free and clear of, and
without reduction for or on account of, any Taxes. If any Taxes are required to
be withheld or deducted from any amounts payable to the Borrower under this
Agreement, the Liquidity Provider shall (i) within the time prescribed therefor
by applicable law pay to the appropriate governmental or taxing authority the
full amount of any such Taxes (and any additional Taxes in respect of the
payment required under clause (ii) hereof) and make such reports or returns in
connection therewith at the time or times and in the manner prescribed by
applicable law, and (ii) pay to the Borrower an additional amount which (after
deduction of all such Taxes) will be sufficient to yield to the Borrower the
full amount which would have been received by it had no such withholding or


                                       14
<PAGE>

deduction been made. Within 30 days after the date of each payment hereunder,
the Liquidity Provider shall furnish to the Borrower the original or a certified
copy of (or other documentary evidence of) the payment of the Taxes applicable
to such payment.

            Section 3.04 Payments. The Borrower shall make or cause to be made
each payment to the Liquidity Provider under this Agreement so as to cause the
same to be received by the Liquidity Provider not later than 1:00 P.M. (New York
City time) on the day when due. The Borrower shall make all such payments in
lawful money of the United States of America, to the Liquidity Provider in
immediately available funds, by wire transfer to Citibank, N.A., New York, N.Y.,
ABA #021000089, Account No. 4063287, Reference: Northwest Airlines Liquidity
Facility 1999-2A, Attention: Tim Smith, Global Loans.

            Section 3.05 Computations. All computations of interest based on the
Base Rate shall be made on the basis of a year of 365 or 366 days, as the case
may be, and all computations of interest based on the LIBOR Rate shall be made
on the basis of a year of 360 days, in each case for the actual number of days
(including the first day but excluding the last day) occurring in the period for
which such interest is payable.

            Section 3.06 Payment on Non-Business Days. Whenever any payment to
be made hereunder shall be stated to be due on a day other than a Business Day,
such payment shall be made on the next succeeding Business Day and no additional
interest shall be due as a result (and if so made, shall be deemed to have been
made when due). If any payment in respect of interest on an Advance is so
deferred to the next succeeding Business Day, such deferral shall not delay the
commencement of the next Interest Period for such Advance (if such Advance is a
LIBOR Advance) or reduce the number of days for which interest will be payable
on such Advance on the next interest payment date for such Advance.

            Section 3.07 Interest. (a) Subject to Section 2.09, the Borrower
shall pay, or shall cause to be paid, without duplication, interest on (i) the
unpaid principal amount of each Advance from and including the date of such
Advance (or, in the case of an Applied Provider Advance, from and including the
date on which the amount thereof was withdrawn from the Class B Cash Collateral
Account to pay interest on the Class B Certificates) to but excluding the date
such principal amount shall be paid in full (or, in the case of an Applied
Provider Advance, the date on which the Class B Cash Collateral Account is fully
replenished in respect of such Advance) and (ii) any other amount due hereunder
(whether fees, commissions, expenses or other amounts or, to the extent
permitted by law, installments of interest on Advances or any such other amount)
which is not paid when due (whether at stated maturity, by acceleration or
otherwise) from and including the due date thereof to but excluding the date
such amount is paid in full, in each such case, at a fluctuating interest rate
per annum for each day equal to the Applicable Liquidity Rate (as defined below)
for such Advance or such other amount as in effect for such day, but in no event
at a rate per annum greater than the maximum rate permitted by applicable law;
provided, however, that, if at any time the otherwise applicable interest rate
as set forth in this Section 3.07 shall exceed the maximum rate permitted by
applicable law, then any subsequent reduction in such interest rate will not
reduce the rate of interest payable pursuant to


                                       15
<PAGE>

this Section 3.07 below the maximum rate permitted by applicable law until the
total amount of interest accrued equals the amount of interest that would have
accrued if such otherwise applicable interest rate as set forth in this Section
3.07 had at all times been in effect.

            (b) Each Advance (other than any Unapplied Provider Advance) will be
either a Base Rate Advance or a LIBOR Advance as provided in this Section. Each
such Advance will be a Base Rate Advance for the period from the date of its
borrowing to (but excluding) the third Business Day following the Liquidity
Provider's receipt of the Notice of Borrowing for such Advance. Thereafter, such
Advance shall be a LIBOR Advance; provided that (i) an Applied Provider Advance
shall always be a LIBOR Advance unless the Borrower elects otherwise and (ii)
the Borrower (at the direction of the Controlling Party, so long as the
Liquidity Provider is not the Controlling Party) may (x) convert the Final
Advance into a Base Rate Advance on the last day of an Interest Period for such
Advance by giving the Liquidity Provider no less than four Business Days' prior
written notice of such election or (y) elect to maintain the Final Advance as a
Base Rate Advance by not requesting a conversion of the Final Advance to a LIBOR
Advance under Clause (5) of the applicable Notice of Borrowing (or, if such
Final Advance is deemed to have been made, without delivery of a Notice of
Borrowing pursuant to Section 2.06, by requesting, prior to 11:00 A.M. on the
first Business Day immediately following the Borrower's receipt of the
applicable Termination Notice, that such Final Advance not be converted from a
Base Rate Advance to a LIBOR Advance).

            (c) Each LIBOR Advance shall bear interest during each Interest
Period at a rate per annum equal to the LIBOR Rate for such Interest Period plus
the Applicable Margin for such LIBOR Advance, payable in arrears on the last day
of such Interest Period and, in the event of the payment of principal of such
LIBOR Advance on a day other than such last day, on the date of such payment (to
the extent of interest accrued on the amount of principal repaid).

            (d) Each Base Rate Advance shall bear interest at a rate per annum
equal to the Base Rate plus the Applicable Margin for such Base Rate Advance,
payable in arrears on each Regular Distribution Date and, in the event of the
payment of principal of such Base Rate Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of interest
accrued on the amount of principal repaid).

            (e) Each Unapplied Provider Advance shall bear interest in an amount
equal to the Investment Earnings on amounts on deposit in the Class B Cash
Collateral Account, payable in arrears on each Distribution Date.

            (f) Each amount not paid when due hereunder (whether fees,
commissions, expenses or other amounts or, to the extent permitted by applicable
law, installments of interest on Advances but excluding Advances) shall bear
interest at a rate per annum equal to the Base Rate plus 2.0% until paid.


                                       16
<PAGE>

            (g) Each change in the Base Rate shall become effective immediately.
The rates of interest specified in this Section 3.07 with respect to any Advance
or other amount shall be referred to as the "Applicable Liquidity Rate".

            Section 3.08 Replacement of Borrower. From time to time and subject
to the successor Borrower's meeting the eligibility requirements set forth in
Section 6.9 of the Intercreditor Agreement applicable to the Subordination
Agent, upon the effective date and time specified in a written and completed
Notice of Replacement Subordination Agent in substantially the form of Annex VI
attached hereto (a "Notice of Replacement Subordination Agent") delivered to the
Liquidity Provider by the then Borrower, the successor Borrower designated
therein shall be substituted for as the Borrower for all purposes hereunder.

            Section 3.09 Funding Loss Indemnification. The Borrower shall pay to
the Liquidity Provider, upon the request of the Liquidity Provider, such amount
or amounts as shall be sufficient (in the reasonable opinion of the Liquidity
Provider) to compensate it for any loss, cost, or expense incurred as a result
of:

            (1) Any repayment of a LIBOR Advance on a date other than the last
      day of the Interest Period for such Advance; or

            (2) Any failure by the Borrower to borrow a LIBOR Advance on the
      date for borrowing specified in the relevant notice under Section 2.02.

            Section 3.10 Illegality. Notwithstanding any other provision in this
Agreement, if any change in any applicable law, rule or regulation, or any
change in the interpretation or administration thereof by any governmental
authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by the Liquidity Provider (or its Lending
Office) with any request or directive (whether or not having the force of law)
of any such authority, central bank or comparable agency shall make it unlawful
or impossible for the Liquidity Provider (or its Lending Office) to maintain or
fund its LIBOR Advances, then upon notice to the Borrower by the Liquidity
Provider, the outstanding principal amount of the LIBOR Advances shall be
converted to Base Rate Advances (a) immediately upon demand of the Liquidity
Provider, if such change or compliance with such request, in the judgment of the
Liquidity Provider, requires immediate repayment; or (b) at the expiration of
the last Interest Period to expire before the effective date of any such change
or request.

                                   ARTICLE IV

                              CONDITIONS PRECEDENT

            Section 4.01 Conditions Precedent to Effectiveness of Section 2.01.
Section 2.01 of this Agreement shall become effective on and as of the first
date (the "Effective Date") on which the following conditions precedent have
been satisfied or waived:


                                       17
<PAGE>

            (a) The Liquidity Provider shall have received on or before the
      Closing Date each of the following, and in the case of each document
      delivered pursuant to paragraphs (i), (ii) and (iii), each in form and
      substance satisfactory to the Liquidity Provider:

                  (i) This Agreement duly executed on behalf of the Borrower;

                  (ii) The Intercreditor Agreement duly executed on behalf of
            each of the parties thereto;

                  (iii) Fully executed copies of each of the Operative
            Agreements executed and delivered on or before the Closing Date
            (other than this Agreement and the Intercreditor Agreement);

                  (iv) A copy of the Prospectus Supplement and specimen copies
            of the Class B Certificates;

                  (v) An executed copy of each document, instrument, certificate
            and opinion delivered on or before the Closing Date pursuant to the
            Class B Trust Agreement, the Intercreditor Agreement and the other
            Operative Agreements (in the case of each such opinion, other than
            the opinion of counsel for the Underwriters, either addressed to the
            Liquidity Provider or accompanied by a letter from the counsel
            rendering such opinion to the effect that the Liquidity Provider is
            entitled to rely on such opinion as of its date as if it were
            addressed to the Liquidity Provider);

                  (vi) Evidence that there shall have been made and shall be in
            full force and effect, all filings, recordings and/or registrations,
            and there shall have been given or taken any notice or other similar
            action as may be reasonably necessary or, to the extent reasonably
            requested by the Liquidity Provider, reasonably advisable, in order
            to establish, perfect, protect and preserve the right, title and
            interest, remedies, powers, privileges, liens and security interests
            of, or for the benefit of, the Trustees, the Borrower and the
            Liquidity Provider created by the Operative Agreements executed and
            delivered on or prior to the Closing Date;

                  (vii) A letter from Northwest Airlines Corporation, pursuant
            to which (i) Northwest Airlines Corporation agrees to provide copies
            of quarterly financial statements and audited annual financial
            statements to the Liquidity Provider, and such other information as
            the Liquidity Provider shall reasonably request with respect to the
            transactions contemplated by the Operative Agreements, in each case,
            only to the extent that Northwest Airlines Corporation is obligated
            to provide such information pursuant to Section 16 of the Leases
            (related to Leased Aircraft) or the corresponding section of the
            Indentures (related to Owned Aircraft) to the parties thereto; and


                                       18
<PAGE>

                  (viii) Such other documents, instruments, opinions and
            approvals pertaining to the transactions contemplated hereby or by
            the other Operative Agreements as the Liquidity Provider shall have
            reasonably requested.

            (b) The following statement shall be true on and as of the Effective
      Date: no event has occurred and is continuing, or would result from the
      entering into of this Agreement or the making of any Advance, which
      constitutes a Liquidity Event of Default.

            (c) The Liquidity Provider shall have received payment in full of
      all fees and other sums required to be paid to or for the account of the
      Liquidity Provider on or prior to the Effective Date.

            (d) All conditions precedent to the issuance of the Certificates
      under the Trust Agreements shall have been satisfied or waived, all
      conditions precedent to the effectiveness of the other Liquidity
      Facilities shall have been satisfied or waived, and all conditions
      precedent to the purchase of the Class B Certificates, Class B
      Certificates and Class C Certificates by the Underwriters under the
      Underwriting Agreement shall have been satisfied (unless any of such
      conditions precedent shall have been waived by the Underwriters).

            (e) The Borrower shall have received a certificate, dated the date
      hereof, signed by a duly authorized representative of the Liquidity
      Provider, certifying that all conditions precedent to the effectiveness of
      Section 2.01 have been satisfied or waived.

            Section 4.02 Conditions Precedent to Borrowing. The obligation of
the Liquidity Provider to make an Advance on the occasion of each Borrowing
shall be subject to the conditions precedent that the Effective Date shall have
occurred and, prior to the date of such Borrowing, the Borrower shall have
delivered a Notice of Borrowing which conforms to the terms and conditions of
this Agreement and has been completed as may be required by the relevant form of
the Notice of Borrowing for the type of Advances requested.

                                    ARTICLE V

                                    COVENANTS

            Section 5.01 Affirmative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will, unless the Liquidity
Provider shall otherwise consent in writing:

            (a) Performance of This and Other Agreements. Punctually pay or
      cause to be paid all amounts payable by it under this Agreement and the
      other Operative Agreements and observe and perform in all material
      respects the conditions, covenants and


                                       19
<PAGE>

      requirements applicable to it contained in this Agreement and the other
      Operative Agreements.

            (b) Reporting Requirements. Furnish to the Liquidity Provider with
      reasonable promptness, such other information and data with respect to the
      transactions contemplated by the Operative Agreements as from time to time
      may be reasonably requested by the Liquidity Provider; and permit the
      Liquidity Provider, upon reasonable notice, to inspect the Borrower's
      books and records with respect to such transactions and to meet with
      officers and employees of the Borrower to discuss such transactions.

            (c) Certain Operative Agreements. Furnish to the Liquidity Provider
      with reasonable promptness, such Operative Agreements entered into after
      the date hereof as from time to time may be reasonably requested by the
      Liquidity Provider.

            Section 5.02 Negative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will not appoint or permit or
suffer to be appointed any successor Borrower without the prior written consent
of the Liquidity Provider, which consent shall not be unreasonably withheld or
delayed.

                                   ARTICLE VI

                           LIQUIDITY EVENTS OF DEFAULT

            Section 6.01 Liquidity Events of Default. If (a) any Liquidity Event
of Default has occurred and is continuing and (b) there is a Performing Note
Deficiency, the Liquidity Provider may, in its discretion, deliver to the
Borrower a Termination Notice, the effect of which shall be to cause (i) this
Agreement to expire on the fifth Business Day after the date on which such
Termination Notice is received by the Borrower, (ii) the Borrower to promptly
request, and the Liquidity Provider to promptly make, a Final Advance in
accordance with Section 2.02(d) hereof and Section 3.6(i) of the Intercreditor
Agreement, (iii) all other outstanding Advances to be automatically converted
into Final Advances for purposes of determining the Applicable Liquidity Rate
for interest payable thereon, and (iv) subject to Sections 2.07 and 2.09 hereof,
all Advances (including, without limitation, any Provider Advance and Applied
Provider Advance), any accrued interest thereon and any other amounts
outstanding hereunder to become immediately due and payable to the Liquidity
Provider.


                                       20
<PAGE>

                                   ARTICLE VII

                                  MISCELLANEOUS

            Section 7.01 Amendments, Etc. No amendment or waiver of any
provision of this Agreement, nor consent to any departure by the Borrower
therefrom, shall in any event be effective unless the same shall be in writing
and signed by the Liquidity Provider, and, in the case of an amendment or of a
waiver by the Borrower, the Borrower, and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given.

            Section 7.02 Notices, Etc. Except as otherwise expressly provided
herein, all notices and other communications provided for hereunder shall be in
writing (including telecopier and mailed or delivered or sent by telecopier):

            Borrower:   STATE STREET BANK AND TRUST COMPANY
                        Two International Place
                        4th Floor
                        Boston, Massachusetts  02110
                        Attention:  Corporate Trust Administration
                        Telecopy:   (617) 664-5151

  Liquidity Provider:   CITIBANK, N.A.
                        Two Penns' Way, Suite 200
                        New Castle, DE  19720
                        Attention:  Tim Smith, Global Loans
                        Telecopy: (302) 894-6120

                        with a copy to:

                        CITIBANK, N.A.

                        Global Aviation
                        399 Park Avenue, 12th Floor
                        New York, New York  10043
                        Attention:  Tom Boyle
                        Telecopy:  (212) 793-1246

or, as to each of the foregoing, at such other address as shall be designated by
such Person in a written notice to the others. All such notices and
communications shall be effective (i) if given by telecopier, when transmitted
to the telecopier number specified above, (ii) if given by mail, when deposited
in the mails addressed as specified above, and (iii) if given by other means,
when delivered at the address specified above, except that written notices to
the Liquidity Provider pursuant to the provisions of Articles II and III hereof
shall not be effective until received by the Liquidity Provider. A copy of all
notices delivered hereunder to either party shall in addition be


                                       21
<PAGE>

delivered to each of the parties to the Participation Agreements at their
respective addresses set forth therein.

            Section 7.03 No Waiver; Remedies. No failure on the part of the
Liquidity Provider to exercise, and no delay in exercising, any right under this
Agreement shall operate as a waiver thereof; nor shall any single or partial
exercise of any right under this Agreement preclude any other or further
exercise thereof or the exercise of any other right. The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.

            Section 7.04 Further Assurances. The Borrower agrees to do such
further acts and things and to execute and deliver to the Liquidity Provider
such additional assignments, agreements, powers and instruments as the Liquidity
Provider may reasonably require or deem advisable to carry into effect the
purposes of this Agreement and the other Operative Agreements or to better
assure and confirm unto the Liquidity Provider its rights, powers and remedies
hereunder and under the other Operative Agreements.

            Section 7.05 Indemnification; Survival of Certain Provisions. The
Liquidity Provider shall be indemnified hereunder to the extent and in the
manner described in Section 7(c) of the Participation Agreements. In addition,
the Borrower agrees to indemnify, protect, defend and hold harmless the
Liquidity Provider from, against and in respect of, and shall pay on demand, all
Expenses of any kind or nature whatsoever (other than any Expenses of the nature
described in Sections 3.01, 3.02 or 7.07 hereof (regardless of whether
indemnified against pursuant to said Sections)), that may be imposed, incurred
by or asserted against any Liquidity Indemnitee, in any way relating to,
resulting from, or arising out of or in connection with any action, suit or
proceeding by any third party against such Liquidity Indemnitee and relating to
this Agreement, the Intercreditor Agreement or any Financing Agreement;
provided, however, that the Borrower shall not be required to indemnify,
protect, defend and hold harmless any Liquidity Indemnitee in respect of any
Expense of such Liquidity Indemnitee to the extent such Expense is (i)
attributable to the gross negligence or willful misconduct of such Liquidity
Indemnitee or any other Liquidity Indemnitee, (ii) ordinary and usual operating
overhead expense, or (iii) attributable to the failure by such Liquidity
Indemnitee or any other Liquidity Indemnitee to perform or observe any
agreement, covenant or condition on its part to be performed or observed in this
Agreement, the Intercreditor Agreement or any other Operative Agreement to which
it is a party. The indemnities contained in Section 7(c) of the Participation
Agreements, and the provisions of Sections 3.01, 3.02, 3.03, 7.05 and 7.07
hereof, shall survive the termination of this Agreement.

            Section 7.06 Liability of the Liquidity Provider. (a) Neither the
Liquidity Provider nor any of its officers, employees, directors or affiliates
shall be liable or responsible for: (i) the use which may be made of the
Advances or any acts or omissions of the Borrower or any beneficiary or
transferee in connection therewith; (ii) the validity, sufficiency or
genuineness of documents, or of any endorsement thereon, even if such documents
should prove to be in any or all respects invalid, insufficient, fraudulent or
forged; or (iii) the making of Advances by the Liquidity Provider against
delivery of a Notice of Borrowing and other documents which do not


                                       22
<PAGE>

comply with the terms hereof; provided, however, that the Borrower shall have a
claim against the Liquidity Provider, and the Liquidity Provider shall be liable
to the Borrower, to the extent of any damages suffered by the Borrower which
were the result of (A) the Liquidity Provider's willful misconduct or negligence
in determining whether documents presented hereunder comply with the terms
hereof, or (B) any breach by the Liquidity Provider of any of the terms of this
Agreement, including, but not limited to, the Liquidity Provider's failure to
make lawful payment hereunder after the delivery to it by the Borrower of a
Notice of Borrowing strictly complying with the terms and conditions hereof.

            (b) Neither the Liquidity Provider nor any of its officers,
employees, directors or affiliates shall be liable or responsible in any respect
for (i) any error, omission, interruption or delay in transmission, dispatch or
delivery of any message or advice, however transmitted, in connection with this
Agreement or any Notice of Borrowing delivered hereunder, or (ii) any action,
inaction or omission which may be taken by it in good faith, absent willful
misconduct or negligence (in which event the extent of the Liquidity Provider's
potential liability to the Borrower shall be limited as set forth in the
immediately preceding paragraph), in connection with this Agreement or any
Notice of Borrowing.

            Section 7.07 Costs, Expenses and Taxes. The Borrower agrees to pay,
or cause to be paid (A) on the Effective Date and on such later date or dates on
which the Liquidity Provider shall make demand, all reasonable out-of-pocket
costs and expenses (including, without limitation, the reasonable fees and
expenses of outside counsel for the Liquidity Provider) of the Liquidity
Provider in connection with the preparation, negotiation, execution, delivery,
filing and recording of this Agreement, any other Operative Agreement and any
other documents which may be delivered in connection with this Agreement and (B)
on demand, all reasonable costs and expenses (including reasonable counsel fees
and expenses) of the Liquidity Provider in connection with (i) the enforcement
of this Agreement or any other Operative Agreement, (ii) the modification or
amendment of, or supplement to, this Agreement or any other Operative Agreement
or such other documents which may be delivered in connection herewith or
therewith (whether or not the same shall become effective) or (iii) any action
or proceeding relating to any order, injunction, or other process or decree
restraining or seeking to restrain the Liquidity Provider from paying any amount
under this Agreement, the Intercreditor Agreement or any other Operative
Agreement or otherwise affecting the application of funds in the Class B Cash
Collateral Account. In addition, the Borrower shall pay any and all recording,
stamp and other similar taxes and fees payable or determined to be payable in
connection with the execution, delivery, filing and recording of this Agreement,
any other Operative Agreement and such other documents, and agrees to save the
Liquidity Provider harmless from and against any and all liabilities with
respect to or resulting from any delay in paying or omission to pay such taxes
or fees.

            Section 7.08 Binding Effect; Participations. (a) This Agreement
shall be binding upon and inure to the benefit of the Borrower and the Liquidity
Provider and their respective successors and assigns, except that neither the
Liquidity Provider (except as otherwise provided in this Section 7.08) nor
(except as contemplated by Section 3.08) the Borrower shall have the


                                       23
<PAGE>

right to assign its rights or obligations hereunder or any interest herein
without the prior written consent of the other party, subject to the
requirements of Section 7.08(b). The Liquidity Provider may grant participations
herein or in any of its rights hereunder (including, without limitation, funded
participations and participations in rights to receive interest payments
hereunder) and under the other Operative Agreements to such Persons as the
Liquidity Provider may in its sole discretion select (but excluding Northwest
and any of its affiliates), subject to the requirements of Section 7.08(b). No
such participation by the Liquidity Provider, however, will relieve the
Liquidity Provider of its obligations hereunder. In connection with any
participation or any proposed participation, the Liquidity Provider may disclose
to the participant or the proposed participant any information that the Borrower
is required to deliver or to disclose to the Liquidity Provider pursuant to this
Agreement. The Borrower acknowledges and agrees that the Liquidity Provider's
source of funds may derive in part from its participants. Accordingly,
references in this Agreement and the other Operative Agreements to
determinations, reserve and capital adequacy requirements, increased costs,
reduced receipts, additional amounts due pursuant to Section 3.03(a) and the
like as they pertain to the Liquidity Provider shall be deemed also to include
those of each of its participants (subject, in each case, to the maximum amount
that would have been incurred by or attributable to the Liquidity Provider
directly if the Liquidity Provider, rather than the participant, had held the
interest participated).

            (b) If, pursuant to subsection (a) above, the Liquidity Provider
sells any participation in this Agreement to any bank or other entity (each, a
"Transferee"), then, concurrently with the effectiveness of such participation,
the Transferee shall (i) represent to the Liquidity Provider (for the benefit of
the Liquidity Provider and the Borrower) either (A) that it is incorporated
under the laws of the United States or a state thereof or (B) that under
applicable law and treaties, no taxes will be required to be withheld with
respect to any payments to be made to such Transferee in respect of this
Agreement, (ii) furnish to the Liquidity Provider and the Borrower either (x) a
statement that it is incorporated under the laws of the United States or a state
thereof or (y) if it is not so incorporated, two copies of a properly completed
United States Internal Revenue Service Form 4224 or Form 1001, as appropriate,
or other applicable form, certificate or document prescribed by the Internal
Revenue Service certifying, in each case, such Transferee's entitlement to a
complete exemption from United States federal withholding tax in respect to any
and all payments to be made hereunder, and (iii) agree (for the benefit of the
Liquidity Provider and the Borrower) to provide the Liquidity Provider and the
Borrower a new Form 4224 or Form 1001, as appropriate, (A) on or before the date
that any such form expires or becomes obsolete or (B) after the occurrence of
any event requiring a change in the most recent form previously delivered by it
and prior to the immediately following due date of any payment by the Borrower
hereunder, certifying in the case of a Form 1001 or Form 4224 that such
Transferee is entitled to a complete exemption from United States federal
withholding tax on payments under this Agreement. Unless the Borrower has
received forms or other documents reasonably satisfactory to it (and required by
applicable law) indicating that payments hereunder are not subject to United
States federal withholding tax, the Borrower will withhold taxes as required by
law from such payments at the applicable statutory rate.


                                       24
<PAGE>

            (c) Notwithstanding the other provisions of this Section 7.08, the
Liquidity Provider may assign and pledge all or any portion of the Advances
owing to it to any Federal Reserve Bank or the United States Treasury as
collateral security pursuant to Regulation A of the Board of Governors of the
Federal Reserve System and any Operating Circular issued by such Federal Reserve
Bank, provided that any payment in respect of such assigned Advances made by the
Borrower to the Liquidity Provider in accordance with the terms of this
Agreement shall satisfy the Borrower's obligations hereunder in respect of such
assigned Advance to the extent of such payment. No such assignment shall release
the Liquidity Provider from its obligations hereunder.

            Section 7.09 Severability. Any provision of this Agreement which is
prohibited, unenforceable or not authorized in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition,
unenforceability or non-authorization without invalidating the remaining
provisions hereof or affecting the validity, enforceability or legality of such
provision in any other jurisdiction.

            Section 7.10 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

            Section 7.11 Submission to Jurisdiction; Waiver of Jury Trial;
Waiver of Immunity. (a) Each of the parties hereto hereby irrevocably and
unconditionally:

            (i) submits for itself and its property in any legal action or
      proceeding relating to this Agreement or any other Operative Agreement, or
      for recognition and enforcement of any judgment in respect hereof or
      thereof, to the nonexclusive general jurisdiction of the courts of the
      State of New York, the courts of the United States of America for the
      Southern District of New York, and the appellate courts from any thereof;

            (ii) consents that any such action or proceeding may be brought in
      such courts, and waives any objection that it may now or hereafter have to
      the venue of any such action or proceeding in any such court or that such
      action or proceeding was brought in an inconvenient court and agrees not
      to plead or claim the same;

            (iii) agrees that service of process in any such action or
      proceeding may be effected by mailing a copy thereof by registered or
      certified mail (or any substantially similar form and mail), postage
      prepaid, to each party hereto at its address set forth in Section 7.02
      hereof, or at such other address of which the Liquidity Provider shall
      have been notified pursuant thereto; and

            (iv) agrees that nothing herein shall affect the right to effect
      service of process in any other manner permitted by law or shall limit the
      right to sue in any other jurisdiction.


                                       25
<PAGE>

            (b) THE BORROWER AND THE LIQUIDITY PROVIDER EACH HEREBY AGREE TO
WAIVE THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT AND THE RELATIONSHIP THAT IS
BEING ESTABLISHED, including, without limitation, contract claims, tort claims,
breach of duty claims and all other common law and statutory claims. The
Borrower and the Liquidity Provider each warrant and represent that it has
reviewed this waiver with its legal counsel, and that it knowingly and
voluntarily waives its jury trial rights following consultation with such legal
counsel. THIS WAIVER IS IRREVOCABLE, AND CANNOT BE MODIFIED EITHER ORALLY OR IN
WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS,
SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.

            Section 7.12 Execution in Counterparts. This Agreement may be
executed in any number of counterparts and by different parties hereto on
separate counterparts, each of which counterparts, when so executed and
delivered, shall be deemed to be an original and all of which counterparts,
taken together, shall constitute but one and the same Agreement.

            Section 7.13 Entirety. This Agreement, the Intercreditor Agreement
and the other Operative Agreements to which the Liquidity Provider is a party
constitute the entire agreement of the parties hereto with respect to the
subject matter hereof and supersedes all prior understandings and agreements of
such parties.

            Section 7.14 Headings. Section headings in this Agreement are
included herein for convenience of reference only and shall not constitute a
part of this Agreement for any other purpose.

            Section 7.15 LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES.
EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE OBLIGATIONS OF THE
LIQUIDITY PROVIDER TO MAKE ADVANCES HEREUNDER, AND THE BORROWER'S RIGHTS TO
DELIVER NOTICES OF BORROWING REQUESTING THE MAKING OF ADVANCES HEREUNDER, SHALL
BE UNCONDITIONAL AND IRREVOCABLE, AND SHALL BE PAID OR PERFORMED, IN EACH CASE
STRICTLY IN ACCORDANCE WITH THE TERMS OF THIS AGREEMENT.

                                  (End of Page)


                                       26
<PAGE>

            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed and delivered by their respective officers thereunto duly
authorized as of the date first set forth above.


                                    STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower

                                    By: /s/  Donald E. Smith
                                       -----------------------------------------
                                       Name: DONALD E. SMITH
                                       Title: PRESIDENT


                                    CITIBANK, N.A., as Liquidity Provider

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:


                                       27
<PAGE>

            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed and delivered by their respective officers thereunto duly
authorized as of the date first set forth above.


                                    STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:


                                    CITIBANK, N.A., as Liquidity Provider

                                    By: /s/ Thomas Boyle
                                       -----------------------------------------
                                       Name:    THOMAS BOYLE
                                       Title: Managing Director
                                               Global Aviation
                                                 399P/12/2
                                              (212) 559-6149


                                       27
<PAGE>

                                                                      Annex I to
                                                      Revolving Credit Agreement

                      INTEREST ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2B) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of an Interest Advance by the Liquidity Provider to be used,
      subject to clause (3)(v) below, for the payment of the interest on the
      Class B Certificates which was payable on ____________, ____ (the
      "Distribution Date") in accordance with the terms and provisions of the
      Class B Trust Agreement and the Class B Certificates, which Advance is
      requested to be made on ____________, ____.

            (3) The amount of the Interest Advance requested hereby (i) is
      $_______________.__, to be applied in respect of the payment of the
      interest which was due and payable on the Class B Certificates on the
      Distribution Date, (ii) does not include any amount with respect to the
      payment of principal of, or premium on, the Class A Certificates, the
      Class B Certificates or the Class C Certificates, or interest on the Class
      A Certificates or the Class C Certificates, (iii) was computed in
      accordance with the provisions of the Certificates, the Class B Trust
      Agreement and the Intercreditor Agreement (a copy of which computation is
      attached hereto as Schedule I), (iv) does not exceed the Maximum Available
      Commitment on the date hereof, (v) does not include any amount of interest
      which was due and payable on the Class B Certificates on such Distribution
      Date but which remains unpaid due to the failure of the Depositary to pay
      any amount of accrued interest on the Deposits on such Distribution Date
      and (vi) has not been and is not the subject of a prior or contemporaneous
      Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will apply the same in accordance with
      the terms of Section 3.6(b) of the Intercreditor Agreement, (b) no portion
      of such amount shall be applied by the Borrower for any other purpose and
      (c) no portion of such amount until so applied shall be commingled with
      other funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, the making of the Interest Advance as requested by this Notice of
Borrowing shall automatically


                                      I-1
<PAGE>

reduce, subject to reinstatement in accordance with the terms of the Liquidity
Agreement, the Maximum Available Commitment by an amount equal to the amount of
the Interest Advance requested to be made hereby as set forth in clause (i) of
paragraph (3) of this Notice of Borrowing and such reduction shall automatically
result in corresponding reductions in the amounts available to be borrowed
pursuant to a subsequent Advance.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                    STATE STREET BANK AND TRUST COMPANY,
                                          not in its individual capacity but
                                          solely as Subordination Agent, as
                                          Borrower


                                    By: ______________________________________
                                        Name:
                                        Title:


                                      I-2
<PAGE>

               SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Interest Advance Notice of
Borrowing]


                                      I-3
<PAGE>

                                                                     Annex II to
                                                      Revolving Credit Agreement

                    NON-EXTENSION ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2B) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Non-Extension Advance by the Liquidity Provider to be used
      for the funding of the Class B Cash Collateral Account in accordance with
      Section 3.6(d) of the Intercreditor Agreement, which Advance is requested
      to be made on __________, ____.

            (3) The amount of the Non-Extension Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class B
      Cash Collateral Account in accordance with Section 3.6(d) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class B Certificates,
      or principal of, or interest or premium on, the Class A Certificates or
      the Class C Certificates, (iii) was computed in accordance with the
      provisions of the Class B Certificates, the Class B Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class B
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(d) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
      Agreement, (A) the making of the Non-Extension Advance as requested by
      this Notice of Borrowing shall automatically and irrevocably terminate the
      obligation of the Liquidity Provider to make further Advances under the
      Liquidity Agreement; and (B) following the making by the Liquidity
      Provider of the Non-Extension Advance requested by this Notice of


                                      II-1
<PAGE>

      Borrowing, the Borrower shall not be entitled to request any further
      Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                     STATE STREET BANK AND TRUST COMPANY,
                                       not in its individual capacity but solely
                                       as Subordination Agent, as Borrower


                                    By: ______________________________________
                                        Name:
                                        Title:


                                      II-2
<PAGE>

             SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Non-Extension Advance Notice of
Borrowing]


                                      II-3
<PAGE>

                                                                    Annex III to
                                                      Revolving Credit Agreement

                      DOWNGRADE ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2B) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Downgrade Advance by the Liquidity Provider to be used for
      the funding of the Class B Cash Collateral Account in accordance with
      Section 3.6(c) of the Intercreditor Agreement by reason of the downgrading
      of the short-term unsecured debt rating of the Liquidity Provider issued
      by either Rating Agency below the Threshold Rating, which Advance is
      requested to be made on __________, ____.

            (3) The amount of the Downgrade Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class B
      Cash Collateral Account in accordance with Section 3.6(c) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class B Certificates,
      or principal of, or interest or premium on, the Class A Certificates or
      the Class C Certificates, (iii) was computed in accordance with the
      provisions of the Class B Certificates, the Class B Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class B
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(c) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Downgrade Advance as requested by this Notice
of Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity


                                     III-1
<PAGE>

Provider of the Downgrade Advance requested by this Notice of Borrowing, the
Borrower shall not be entitled to request any further Advances under the
Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                   STATE STREET BANK AND TRUST COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower


                                   By: _____________________________________
                                       Name:
                                       Title:


                                     III-2
<PAGE>

               SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Downgrade Advance Notice of
Borrowing]


                                     III-3
<PAGE>

                                                                     Annex IV to
                                                      Revolving Credit Agreement

                        FINAL ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2B) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Final Advance by the Liquidity Provider to be used for the
      funding of the Class B Cash Collateral Account in accordance with Section
      3.6(i) of the Intercreditor Agreement by reason of the receipt by the
      Borrower of a Termination Notice from the Liquidity Provider with respect
      to the Liquidity Agreement, which Advance is requested to be made on
      ____________, ____.

            (3) The amount of the Final Advance requested hereby (i) is
      $_________________.__, which equals the Maximum Available Commitment on
      the date hereof and is to be applied in respect of the funding of the
      Class B Cash Collateral Account in accordance with Section 3.6(i) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of principal of, or premium on, the Class B Certificates, or
      principal of, or interest or premium on, the Class A Certificates or the
      Class C Certificates, (iii) was computed in accordance with the provisions
      of the Class B Certificates, the Class B Trust Agreement and the
      Intercreditor Agreement (a copy of which computation is attached hereto as
      Schedule I), and (iv) has not been and is not the subject of a prior or
      contemporaneous Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class B
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(i) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.


                                      IV-1
<PAGE>

            (5) The Borrower hereby requests that the Advance requested hereby
      be a Base Rate Advance [and that such Base Rate Advance be converted into
      a LIBOR Advance on the third Business Day following your receipt of this
      notice](1).

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Final Advance as requested by this Notice of
Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity Provider of the Final Advance
requested by this Notice of Borrowing, the Borrower shall not be entitled to
request any further Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                     STATE STREET BANK AND TRUST COMPANY,
                                           not in its individual capacity but
                                           solely as Subordination Agent, as
                                           Borrower


                                     By: ____________________________________
                                         Name:
                                         Title:

- ----------
(1)   Bracketed language may be included at Borrower's option.


                                      IV-2
<PAGE>

                 SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Final Advance Notice of
Borrowing]


                                      IV-3
<PAGE>

                                                                      Annex V to
                                                      Revolving Credit Agreement

                              NOTICE OF TERMINATION

                                                      [Date]

State Street Bank and Trust Company,
  as Subordination Agent, as Borrower
Two International Place, 4th Floor
Boston, MA 02110

Attention: Corporate Trust Administration

      Revolving Credit Agreement (1999-2B) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            You are hereby notified that pursuant to Section 6.01 of the
Liquidity Agreement, by reason of the occurrence of a Liquidity Event of Default
and the existence of a Performing Note Deficiency (each as defined therein), we
are giving this notice to you in order to cause (i) our obligations to make
Advances (as defined therein) under such Liquidity Agreement to terminate on the
fifth Business Day after the date on which you receive this notice and (ii) you
to request a Final Advance under the Liquidity Agreement pursuant to Section
3.6(i) of the Intercreditor Agreement (as defined in the Liquidity Agreement) as
a consequence of your receipt of this notice.


                                      V-1
<PAGE>

            THIS NOTICE IS THE "NOTICE OF TERMINATION" PROVIDED FOR UNDER THE
LIQUIDITY AGREEMENT. OUR OBLIGATIONS TO MAKE ADVANCES UNDER THE LIQUIDITY
AGREEMENT WILL TERMINATE ON THE FIFTH BUSINESS DAY AFTER THE DATE ON WHICH YOU
RECEIVE THIS NOTICE.

                                Very truly yours,

                                     CITIBANK, N.A.,  as Liquidity Provider


                                     By: ____________________________________
                                         Name:
                                         Title:

cc:   State Street Bank and Trust Company of
      Connecticut, National Association,
        as Class B Trustee


                                      V-2
<PAGE>

                                                                     Annex VI to
                                                      Revolving Credit Agreement

                    NOTICE OF REPLACEMENT SUBORDINATION AGENT

[Date]
Attention:

      Revolving Credit Agreement (1999-2B) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            For value received, the undersigned beneficiary hereby irrevocably
transfers to:

                         ______________________________
                              [Name of Transferee]

                         ______________________________
                             [Address of Transferee]

all rights and obligations of the undersigned as Borrower under the Liquidity
Agreement referred to above. The transferee has succeeded the undersigned as
Subordination Agent under the Intercreditor Agreement referred to in the first
paragraph of the Liquidity Agreement, pursuant to the terms of Section 8.1 of
the Intercreditor Agreement.

            By this transfer, all rights of the undersigned as Borrower under
the Liquidity Agreement are transferred to the transferee and the transferee
shall hereafter have the sole rights and obligations as Borrower thereunder. The
undersigned shall pay any costs and expenses of such transfer, including, but
not limited to, transfer taxes or governmental charges.


                                      VI-1
<PAGE>

            We ask that this transfer be effective as of _______________, ____.

                                     STATE STREET BANK AND TRUST COMPANY,
                                        not in its individual capacity but
                                        solely as Subordination Agent, as
                                        Borrower


                                     By: ____________________________________
                                         Name:
                                         Title:


                                      VI-2


                                                                 EXHIBIT 4(c)(3)

                                                                  EXECUTION COPY

- --------------------------------------------------------------------------------

                          REVOLVING CREDIT AGREEMENT
                                  (1999-2C)

                          Dated as of June 25, 1999

                                   between

                     STATE STREET BANK AND TRUST COMPANY

                           as Subordination Agent,

                                 as Borrower

                                     and

                                CITIBANK, N.A.

                            as Liquidity Provider

- --------------------------------------------------------------------------------

                                 Relating to

                Northwest Airlines Pass Through Trust 1999-2C
             7.575% Northwest Airlines Pass Through Certificates,
                                Series 1999-2C

<PAGE>

                               TABLE OF CONTENTS

                                                                            Page

ARTICLE I

      DEFINITIONS

      Section 1.01  Certain Defined Terms....................................1

ARTICLE II

      AMOUNT AND TERMS OF THE COMMITMENT

      Section 2.01  The Advances.............................................7
      Section 2.02  Making the Advances......................................7
      Section 2.03  Fees.....................................................9
      Section 2.04  Reduction or Termination of the Maximum Commitment.......9
      Section 2.05  Repayments of Interest Advances or the Final Advance....10
      Section 2.06  Repayments of Provider Advances.........................10
      Section 2.07  Payments to the Liquidity Provider Under the
                    Intercreditor Agreement ................................11
      Section 2.08  Book Entries............................................11
      Section 2.09  Payments from Available Funds Only......................12
      Section 2.10  Extension of the Expiry Date; Non-Extension Advance.....12

ARTICLE III

      OBLIGATIONS OF THE BORROWER

      Section 3.01  Increased Costs.........................................12
      Section 3.02  Capital Adequacy........................................13
      Section 3.03  Payments Free of Deductions.............................14
      Section 3.04  Payments................................................15
      Section 3.05  Computations............................................15
      Section 3.06  Payment on Non-Business Days............................15
      Section 3.07  Interest................................................15
      Section 3.08  Replacement of Borrower.................................17
      Section 3.09  Funding Loss Indemnification............................17
      Section 3.10  Illegality..............................................17


                                      i

<PAGE>

                                                                          Page

ARTICLE IV

      CONDITIONS PRECEDENT

      Section 4.01  Conditions Precedent to Effectiveness of Section 2.01...17
      Section 4.02  Conditions Precedent to Borrowing.......................19

ARTICLE V

      COVENANTS

      Section 5.01  Affirmative Covenants of the Borrower...................19
      Section 5.02  Negative Covenants of the Borrower......................20

ARTICLE VI

      LIQUIDITY EVENTS OF DEFAULT

      Section 6.01  Liquidity Events of Default.............................20

ARTICLE VII

      MISCELLANEOUS

      Section 7.01  Amendments, Etc.........................................21
      Section 7.02  Notices, Etc............................................21
      Section 7.03  No Waiver; Remedies.....................................22
      Section 7.04  Further Assurances......................................22
      Section 7.05  Indemnification; Survival of Certain Provisions.........22
      Section 7.06  Liability of the Liquidity Provider.....................22
      Section 7.07  Costs, Expenses and Taxes...............................23
      Section 7.08  Binding Effect; Participations..........................23
      Section 7.09  Severability............................................25
      Section 7.10  GOVERNING LAW...........................................25
      Section 7.11  Submission to Jurisdiction; Waiver of Jury Trial;
                    Waiver of Immunity .....................................25
      Section 7.12  Execution in Counterparts...............................26
      Section 7.13  Entirety................................................26
      Section 7.14  Headings................................................26
      Section 7.15  LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES........26


                                      ii

<PAGE>

ANNEXES

ANNEX I   Interest Advance Notice of Borrowing
ANNEX II  Non-Extension Advance Notice of Borrowing
ANNEX III Downgrade Advance Notice of Borrowing
ANNEX IV  Final Advance Notice of Borrowing
ANNEX V   Notice of Termination
ANNEX VI  Notice of Replacement Subordination Agent


                                       iii

<PAGE>

                          REVOLVING CREDIT AGREEMENT

            This REVOLVING CREDIT AGREEMENT dated as of June 25, 1999, between
STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company, not in its
individual capacity but solely as Subordination Agent under the Intercreditor
Agreement (each as defined below), (the "Borrower"), and CITIBANK, N.A, a
national banking association organized under the laws of the United States (the
"Liquidity Provider").

                             W I T N E S S E T H:

            WHEREAS, pursuant to the Class C Trust Agreement (such term and all
other capitalized terms used in these recitals having the meanings set forth or
referred to in Section 1.01), the Class C Trust is issuing the Class C
Certificates; and

            WHEREAS, the Borrower, in order to support the timely payment of a
portion of the interest on the Class C Certificates in accordance with their
terms, has requested the Liquidity Provider to enter into this Agreement,
providing in part for the Borrower to request in specified circumstances that
Advances be made hereunder.

            NOW, THEREFORE, in consideration of the premises, the parties hereto
agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

            Section 1.01 Certain Defined Terms. (a) Definitions. As used in this
Agreement and unless otherwise expressly indicated, or unless the context
clearly requires otherwise, the following capitalized terms shall have the
following respective meanings for all purposes of this Agreement:

            "Advance" means an Interest Advance, a Final Advance, a Provider
      Advance, an Applied Provider Advance or an Unpaid Advance, as the case may
      be.

            "Applicable Liquidity Rate" has the meaning assigned to such term in
      Section 3.07(g).

            "Applicable Margin" means with respect to any Unpaid Advance or
      Applied Provider Advance, 2.0%.

            "Applied Downgrade Advance" has the meaning assigned to such term in
      Section 2.06(a).

<PAGE>

            "Applied Non-Extension Advance" has the meaning assigned to such
      term in Section 2.06(a).

            "Applied Provider Advance" has the meaning assigned to such term in
      Section 2.06(a).

            "Base Rate"means a fluctuating interest rate per annum in effect
      from time to time, which rate per annum is at all times equal to (a) the
      weighted average of the rates on overnight Federal funds transactions with
      members of the Federal Reserve System arranged by Federal funds brokers,
      as published for such day (or, if such day is not a Business Day, for the
      next preceding Business Day) by the Federal Reserve Bank of New York, or
      if such rate is not so published for any day that is a Business Day, the
      average of the quotations for such day for such transactions received by
      the Liquidity Provider from three Federal funds brokers of recognized
      standing selected by the Liquidity Provider, plus (b) one quarter of one
      percent (0.25%) per annum.

            "Base Rate Advance" means an Advance that bears interest at a rate
      based upon the Base Rate.

            "Borrower" has the meaning assigned to such term in the recital of
      parties to this Agreement.

            "Borrowing" means the making of Advances requested by delivery of a
      Notice of Borrowing.

            "Business Day" means any day other than a Saturday or Sunday or a
      day on which commercial banks are required or authorized to close in New
      York, New York, Minneapolis, Minnesota, Chicago, Illinois, Boston,
      Massachusetts and Salt Lake City, Utah, or, so long as any Class C
      Certificate is outstanding, the city and state in which the Class C
      Trustee, the Borrower or any Loan Trustee maintains its Corporate Trust
      Office or receives or disburses funds, and, if the applicable Business Day
      relates to any Advance or other amount bearing interest based on the LIBOR
      Rate, on which dealings are carried on in the London interbank market.

            "Delivery Period" means the period from the date hereof through May
      31, 2000.

            "Deposit Agreement" means the Deposit Agreement, dated June 25,
      1999, between First Security Bank, National Association, as Escrow Agent
      and ABN AMRO Bank N.V., acting through its Chicago Branch, as Depositary,
      pertaining to the Class C Certificates, as the same may be amended,
      modified or supplemented from time to time in accordance with the terms
      thereof.

            "Depositary" has the meaning assigned to such term in the Deposit
      Agreement.


                                       2
<PAGE>

            "Deposits" has the meaning assigned to such terms in the Deposit
      Agreement.

            "Downgrade Advance" means an Advance made pursuant to Section
      2.02(c).

            "Effective Date" has the meaning specified in Section 4.01. The
      delivery of the certificate of the Liquidity Provider contemplated by
      Section 4.01(e) shall be conclusive evidence that the Effective Date has
      occurred.

            "Excluded Taxes" means (i) Taxes imposed on the overall net income
      of the Liquidity Provider and (ii) Excluded Withholding Taxes.

            "Excluded Withholding Taxes" means (i) withholding Taxes imposed by
      the United States except to the extent that such United States withholding
      Taxes are imposed as a result of any change in applicable law (excluding
      from "change in applicable law" for this purpose, a change in an
      applicable treaty or other change in law affecting the applicability of a
      treaty) after the date hereof, or in the case of a successor Liquidity
      Provider (including a transferee of an Advance) or Lending Office, after
      the date on which such successor Liquidity Provider obtains its interest
      or on which the Lending Office is changed, and (ii) any withholding Taxes
      imposed by the United States which are imposed or increased as a result of
      the Liquidity Provider failing to deliver to the Borrower any certificate
      or document (which certificate or document in the good faith judgment of
      the Liquidity Provider it is legally entitled to provide) which is
      reasonably requested by the Borrower to establish that payments under this
      Agreement are exempt from (or entitled to a reduced rate of) withholding
      Tax.

            "Expenses" means liabilities, obligations, damages, settlements,
      penalties, claims, actions, suits, costs, expenses, and disbursements
      (including, without limitation, reasonable fees and disbursements of legal
      counsel and costs of investigation), provided that Expenses shall not
      include any Taxes.

            "Expiry Date" means June 14, 2000, initially, or any date to which
      the Expiry Date is extended pursuant to Section 2.10.

            "Final Advance" means an Advance made pursuant to Section 2.02(d).

            "Intercreditor Agreement" means the Intercreditor Agreement dated
      the date hereof, among the Trustees, the Liquidity Provider, the liquidity
      provider under each Liquidity Facility (other than this Agreement) and the
      Subordination Agent, as the same may be amended, supplemented or otherwise
      modified from time to time in accordance with its terms.

            "Interest Advance" means an Advance made pursuant to Section
      2.02(a).


                                       3
<PAGE>

            "Interest Period" means, with respect to any LIBOR Advance, each of
      the following periods:

            (i)   the period beginning either (x) on the date such LIBOR Advance
                  is made (or is converted from a Base Rate Advance) or (y) the
                  date of the withdrawal of funds from the Class C Cash
                  Collateral Account for the purpose of paying interest on the
                  Class C Certificates as contemplated by Section 2.06(a) hereof
                  and, in each case, ending on the next Regular Distribution
                  Date; and

            (ii)  each subsequent period commencing on the last day of the
                  immediately preceding Interest Period and ending on the next
                  Regular Distribution Date;

      provided, however, that if (x) the Final Advance shall have been made, or
      (y) other outstanding Advances shall have been converted into the Final
      Advance, then the Interest Periods shall be successive periods of one
      month beginning on the date such Final Advance is made (in the case of
      clause (x) above) or the Regular Distribution Date following such
      conversion (in the case of clause (y) above).

            "Lending Office" means the lending office of the Liquidity Provider
      presently located in New York, New York, or such other lending office as
      the Liquidity Provider from time to time shall notify the Borrower as its
      lending office hereunder.

            "LIBOR Advance" means an Advance bearing interest at a rate based
      upon the LIBOR Rate.

            "LIBOR Rate" means, with respect to any Interest Period, (i) the
      rate per annum appearing on display page 3750 (British Bankers
      Association--LIBOR) of the Dow Jones Markets Service (or any successor or
      substitute therefor) at approximately 11:00 A.M. (London time) two
      Business Days before the first day of such Interest Period, as the rate
      for dollar deposits with a maturity comparable to such Interest Period, or
      (ii) if the rate calculated pursuant to clause (i) above is not available,
      the average (rounded upwards, if necessary, to the next 1/16 of 1%) of the
      rates per annum at which deposits in dollars are offered for the relevant
      Interest Period by three banks of recognized standing selected by the
      Liquidity Provider in the London interbank market at approximately 11:00
      A.M. (London time) two business days before the first day of such Interest
      Period in an amount approximately equal to the principal amount of the
      LIBOR Advance to which such Interest Period is to apply and for a period
      comparable to such Interest Period.

            "Liquidity Event of Default" means the occurrence of the following:
      (i) all of the Equipment Notes shall have been either declared to be
      immediately due and payable or shall not have been paid at their final
      maturity; provided that, if an acceleration of the Equipment Notes occurs
      during the Delivery Period, a Liquidity Event of Default shall


                                       4
<PAGE>

      occur only if the aggregate principal amount of the Equipment Notes
      exceeds $300 million, or (ii) a Northwest Bankruptcy Event.

            "Liquidity Indemnitee" means (i) the Liquidity Provider, (ii) the
      directors, officers, employees and agents of the Liquidity Provider, and
      (iii) the successors and permitted assigns of the persons described in
      clauses (i) and (ii), inclusive.

            "Liquidity Provider" has the meaning assigned to such term in the
      recital of parties to this Agreement.

            "Maximum Available Commitment" shall mean, subject to the proviso
      contained in the third sentence of Section 2.02(a), at any time of
      determination, (a) the Maximum Commitment at such time less (b) the
      aggregate amount of each Interest Advance outstanding at such time;
      provided that following a Provider Advance or a Final Advance, the Maximum
      Available Commitment shall be zero.

            "Maximum Commitment" means, for any day, the lesser of (x)
      $12,720,316.32 and (y) the Required Amount on such day.

            "Non-Excluded Tax" has the meaning specified in Section 3.03(a).

            "Non-Extension Advance" means an Advance made pursuant to Section
      2.02(b).

            "Notice of Borrowing" has the meaning specified in Section 2.02(e).

            "Notice of Replacement Subordination Agent" has the meaning
      specified in Section 3.08.

            "Performing Note Deficiency" means any time that less than 65% of
      the then aggregate outstanding principal amount of all Equipment Notes are
      Performing Equipment Notes.

            "Prospectus Supplement" means the Prospectus Supplement dated June
      25, 1999, relating to the Class A Certificates, the Class B Certificates
      and the Class C Certificates, as such Prospectus Supplement may be amended
      or supplemented.

            "Provider Advance" means a Downgrade Advance or a Non-Extension
      Advance.

            "Replenishment Amount" has the meaning assigned to such term in
      Section 2.06(b).

            "Required Amount" means, for any day, the sum of the aggregate
      amount of interest, calculated at the rate per annum equal to the Stated
      Interest Rate for the Class C Certificates, that would be payable on the
      Class C Certificates on each of the three


                                       5
<PAGE>

      successive semiannual Regular Distribution Dates immediately following
      such day or, if such day is a Regular Distribution Date, on such day and
      the succeeding two semiannual Regular Distribution Dates, in each case
      calculated on the basis of the Pool Balance of the Class C Certificates on
      such day and without regard to expected future payments of principal on
      the Class C Certificates.

            "Termination Date" means the earliest to occur of the following: (i)
      the Expiry Date; (ii) the date on which the Borrower delivers to the
      Liquidity Provider a certificate, signed by a Responsible Officer of the
      Borrower, certifying that all of the Class C Certificates have been paid
      in full (or provision has been made for such payment in accordance with
      the Intercreditor Agreement and the Trust Agreements) or are otherwise no
      longer entitled to the benefits of this Agreement; (iii) the date on which
      the Borrower delivers to the Liquidity Provider a certificate, signed by a
      Responsible Officer of the Borrower, certifying that a Replacement
      Liquidity Facility has been substituted for this Agreement in full
      pursuant to Section 3.6(e) of the Intercreditor Agreement; (iv) the fifth
      Business Day following the receipt by the Borrower of a Termination Notice
      from the Liquidity Provider pursuant to Section 6.01 hereof; and (v) the
      date on which no Advance is or may (including by reason of reinstatement
      as herein provided) become available for a Borrowing hereunder.

            "Termination Notice" means the Notice of Termination substantially
      in the form of Annex V to this Agreement.

            "Transferee" has the meaning assigned to such term in Section
      7.08(b).

            "Unapplied Downgrade Advance" means any Downgrade Advance other than
      an Applied Downgrade Advance.

            "Unapplied Provider Advance" means any Provider Advance other than
      an Applied Provider Advance.

            "Unpaid Advance" has the meaning assigned to such term in Section
      2.05.

            (b) Terms Defined in the Intercreditor Agreement. For all purposes
of this Agreement, the following terms shall have the respective meanings
assigned to such terms in the Intercreditor Agreement:

      "Acceleration", "Certificates", "Class A Certificates", "Class B
      Certificates", "Class C Cash Collateral Account", "Class C Certificates",
      "Class C Certificateholders", "Class C Trust", "Class C Trust Agreement",
      "Class C Trustee", "Closing Date", "Controlling Party", "Corporate Trust
      Office", "Delivery Period Expiry Date", "Distribution Date", "Downgraded
      Facility", "Equipment Notes", "Final Legal Distribution Date", "Financing
      Agreement", "Indenture", "Interest Payment Date", "Investment Earnings",
      "Liquidity Facility", "Liquidity Obligations", "Loan Trustee", "Moody's",
      "Non-Extended Facility",


                                       6
<PAGE>

      "Northwest", "Northwest Bankruptcy Event", "Note Purchase Agreement",
      "Operative Agreements", "Performing Equipment Note", "Person", "Pool
      Balance", "Rating Agency", "Ratings Confirmation", "Regular Distribution
      Date", "Replacement Liquidity Facility", "Responsible Officer", "Scheduled
      Payment", "Special Payment", "Standard & Poor's", "Stated Interest Rate",
      "Subordination Agent", "Taxes", "Threshold Rating", "Trust Agreements",
      "Trustee", "Underwriters", "Underwriting Agreement" and "Written Notice".

                                  ARTICLE II

                      AMOUNT AND TERMS OF THE COMMITMENT

            Section 2.01 The Advances. The Liquidity Provider hereby irrevocably
agrees, on the terms and conditions hereinafter set forth, to make Advances to
the Borrower from time to time on any Business Day during the period from the
Effective Date until 12:00 Noon (New York City time) on the Expiry Date (unless
the obligations of the Liquidity Provider shall be earlier terminated in
accordance with the terms of Section 2.04(b)) in an aggregate amount at any time
outstanding not to exceed the Maximum Commitment.

            Section 2.02 Making the Advances. (a) Interest Advances shall be
made in one or more Borrowings by delivery to the Liquidity Provider of one or
more written and completed Notices of Borrowing in substantially the form of
Annex I attached hereto, signed by a Responsible Officer of the Borrower, in an
amount not exceeding the Maximum Available Commitment at such time and shall be
used solely for the payment when due of interest on the Class C Certificates at
the Stated Interest Rate therefor in accordance with Section 3.6(a) of the
Intercreditor Agreement. Each Interest Advance made hereunder shall
automatically reduce the Maximum Available Commitment and the amount available
to be borrowed hereunder by subsequent Advances by the amount of such Interest
Advance (subject to reinstatement as provided in the next sentence). Upon
repayment to the Liquidity Provider in full of the amount of any Interest
Advance made pursuant to this Section 2.02(a), together with accrued interest
thereon (as provided herein), the Maximum Available Commitment shall be
reinstated by the amount of such repaid Interest Advance, but not to exceed the
Maximum Commitment; provided, however, that the Maximum Available Commitment
shall not be so reinstated at any time if (i) a Liquidity Event of Default shall
have occurred and be continuing and (ii) there is a Performing Note Deficiency.

            (b) A Non-Extension Advance shall be made in a single Borrowing if
this Agreement is not extended in accordance with Section 3.6(d) of the
Intercreditor Agreement (unless a Replacement Liquidity Facility to replace this
Agreement shall have been delivered to the Borrower as contemplated by said
Section 3.6(d) within the time period specified in such Section) by delivery to
the Liquidity Provider of a written and completed Notice of Borrowing in
substantially the form of Annex II attached hereto, signed by a Responsible
Officer of the Borrower, in an amount equal to the Maximum Available Commitment
at such time, and shall be


                                       7
<PAGE>

used to fund the Class C Cash Collateral Account in accordance with said Section
3.6(d) and Section 3.6(f) of the Intercreditor Agreement.

            (c) A Downgrade Advance shall be made in a single Borrowing upon a
downgrading of the Liquidity Provider's short-term unsecured debt rating issued
by either Rating Agency below the applicable Threshold Rating (as provided for
in Section 3.6(c) of the Intercreditor Agreement) unless a Replacement Liquidity
Facility to replace this Agreement shall have been previously delivered to the
Borrower in accordance with said Section 3.6(c), by delivery to the Liquidity
Provider of a written and completed Notice of Borrowing in substantially the
form of Annex III attached hereto, signed by a Responsible Officer of the
Borrower, in an amount equal to the Maximum Available Commitment at such time,
and shall be used to fund the Class C Cash Collateral Account in accordance with
said Section 3.6(c) and Section 3.6(f) of the Intercreditor Agreement.

            (d) A Final Advance shall be made in a single Borrowing upon the
receipt by the Borrower of a Termination Notice from the Liquidity Provider
pursuant to Section 6.01 hereof by delivery to the Liquidity Provider of a
written and completed Notice of Borrowing in substantially the form of Annex IV
attached hereto, signed by a Responsible Officer of the Borrower, in an amount
equal to the Maximum Available Commitment at such time, and shall be used to
fund the Class C Cash Collateral Account in accordance with Section 3.6(i) and
Section 3.6(f) of the Intercreditor Agreement.

            (e) Each Borrowing shall be made on notice in writing (a "Notice of
Borrowing") in substantially the form required by Section 2.02(a), 2.02(b),
2.02(c) or 2.02(d), as the case may be, given by the Borrower to the Liquidity
Provider. If a Notice of Borrowing is delivered by the Borrower in respect of
any Borrowing no later than 1:00 p.m. (New York City time) on a Business Day,
upon satisfaction of the conditions precedent set forth in Section 4.02 with
respect to a requested Borrowing, the Liquidity Provider shall make available to
the Borrower, in accordance with its payment instructions, the amount of such
Borrowing in U.S. dollars and immediately available funds, before 4:00 p.m. (New
York City time) on such Business Day or on such later Business Day specified in
such Notice of Borrowing. If a Notice of Borrowing is delivered by the Borrower
in respect of any Borrowing after 1:00 p.m. (New York City time) on a Business
Day, upon satisfaction of the conditions precedent set forth in Section 4.02
with respect to a requested Borrowing, the Liquidity Provider shall make
available to the Borrower, in accordance with its payment instructions, the
amount of such Borrowing in U.S. dollars and immediately available funds, before
12:00 Noon (New York City time) on the first Business Day next following the day
of receipt of such Notice of Borrowing or on such later Business Day specified
by the Borrower in such Notice of Borrowing. Payments of proceeds of a Borrowing
shall be made by wire transfer of immediately available funds to the Borrower in
accordance with such wire transfer instructions as the Borrower shall furnish
from time to time to the Liquidity Provider for such purpose. Each Notice of
Borrowing shall be irrevocable and binding on the Borrower.


                                       8
<PAGE>

            (f) Upon the making of any Advance requested pursuant to a Notice of
Borrowing, in accordance with the Borrower's payment instructions, the Liquidity
Provider shall be fully discharged of its obligation hereunder with respect to
such Notice of Borrowing, and the Liquidity Provider shall not thereafter be
obligated to make any further Advances hereunder in respect of such Notice of
Borrowing to the Borrower or to any other Person. Following the making of any
Advance pursuant to Section 2.02(b), (c) or (d) hereof to fund the Class C Cash
Collateral Account, the Liquidity Provider shall have no interest in or rights
to the Class C Cash Collateral Account, such Advance or any other amounts from
time to time on deposit in the Class C Cash Collateral Account; provided that
the foregoing shall not affect or impair the obligations of the Subordination
Agent to make the distributions contemplated by Section 3.6(e) or (f) of the
Intercreditor Agreement. By paying to the Borrower proceeds of Advances
requested by the Borrower in accordance with the provisions of this Agreement,
the Liquidity Provider makes no representation as to, and assumes no
responsibility for, the correctness or sufficiency for any purpose of the amount
of the Advances so made and requested.

            Section 2.03 Fees. (a) The Borrower agrees to pay to the Liquidity
Provider on the effective date a non-refundable fee equal to $226,880.91 in
aggregate with respect to this Agreement, the Revolving Credit Agreement
(1999-2B) dated as of June 25, 1999, by and between State Street Bank and Trust
Company and Citibank, N.A., and the Revolving Credit Agreement (1999-2C) dated
as of June 25, 1999, by and between State Street Bank and Trust Company and
Citibank, N.A.

            (b) The Borrower shall pay, or shall cause to be paid, to the
Liquidity Provider, a fee equal to 0.35% per annum on the average Maximum
Available Commitment from the Effective Date to the earlier of the date on which
a Downgrade Advance or Non-Extension Advance is made and the date on which the
Maximum Commitment terminates. Such fee shall be payable in arrears on each
Regular Distribution Date. In addition, the Borrower shall pay, or shall cause
to be paid, to the Liquidity Provider, a fee equal to 0.35% per annum on the
unpaid principal amount of each Downgrade Advance or Non-Extension Advance
(other than an Applied Downgrade Advance or an Applied Non-Extension Advance)
from and including the date of such Advance to but excluding the date such
principal amount shall be paid in full. Such fee shall be payable in arrears on
each Regular Distribution Date and, in the event of the payment of principal of
such Downgrade Advance or Non-Extension Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of the foregoing
fee accrued on the amount of principal repaid). Nothing contained in this
Section 2.03(b) shall require the Borrower to pay any amount under this Section
2.03(b) other than to the extent the Borrower shall have funds available
therefor, and, in all events, subject to the terms of the Intercreditor
Agreement.

            Section 2.04 Reduction or Termination of the Maximum Commitment.

            (a) Automatic Reduction. Promptly following each date on which the
Required Amount is reduced as a result of a reduction in the Pool Balance of the
Class C Certificates or otherwise, the Maximum Commitment shall automatically be
reduced to an amount equal to such


                                       9
<PAGE>

reduced Required Amount (as calculated by the Borrower). The Borrower shall give
notice of any such automatic reduction of the Maximum Commitment to the
Liquidity Provider within two Business Days thereof. The failure by the Borrower
to furnish any such notice shall not affect such automatic reduction of the
Maximum Commitment.

            (b) Termination. Upon the making of any Provider Advance or Final
Advance hereunder or the occurrence of the Termination Date, the obligation of
the Liquidity Provider to make further Advances hereunder shall automatically
and irrevocably terminate, and the Borrower shall not be entitled to request any
further Borrowing hereunder.

            Section 2.05 Repayments of Interest Advances or the Final Advance.
Subject to Sections 2.06, 2.07 and 2.09 hereof, the Borrower hereby agrees,
without notice of an Advance or demand for repayment from the Liquidity Provider
(which notice and demand are hereby waived by the Borrower), to pay, or to cause
to be paid, to the Liquidity Provider on each date on which the Liquidity
Provider shall make an Interest Advance or the Final Advance, an amount equal to
(a) the amount of such Advance (any such Advance, until repaid, is referred to
herein as an "Unpaid Advance"), plus (b) interest on the amount of each such
Unpaid Advance as provided in Section 3.07 hereof; provided that if (i) the
Liquidity Provider shall make a Provider Advance at any time after making one or
more Interest Advances which shall not have been repaid in accordance with this
Section 2.05 or (ii) this Liquidity Facility shall become a Downgraded Facility
or Non-Extended Facility at any time when unreimbursed Interest Advances have
reduced the Maximum Available Commitment to zero, then such Interest Advances
shall cease to constitute Unpaid Advances and shall be deemed to have been
changed into an Applied Downgrade Advance or an Applied Non-Extension Advance,
as the case may be, for all purposes of this Agreement (including, without
limitation, for the purpose of determining when such Interest Advance is
required to be repaid to the Liquidity Provider in accordance with Section 2.06
and for the purposes of Section 2.06(b)). The Borrower and the Liquidity
Provider agree that the repayment in full of each Interest Advance and Final
Advance on the date such Advance is made is intended to be a contemporaneous
exchange for new value given to the Borrower by the Liquidity Provider.

            Section 2.06 Repayments of Provider Advances. (a) Amounts advanced
hereunder in respect of a Provider Advance shall be deposited in the Class C
Cash Collateral Account, invested and withdrawn from the Class C Cash Collateral
Account as set forth in Sections 3.6(c), (d) and (f) of the Intercreditor
Agreement. The Borrower agrees to pay to the Liquidity Provider, on each Regular
Distribution Date, commencing on the first Regular Distribution Date after the
making of a Provider Advance, interest on the principal amount of any such
Provider Advance as provided in Section 3.07; provided, however, that amounts in
respect of a Provider Advance withdrawn from the Class C Cash Collateral Account
for the purpose of paying interest on the Class C Certificates in accordance
with Section 3.6(f) of the Intercreditor Agreement (the amount of any such
withdrawal being (y) in the case of a Downgrade Advance, an "Applied Downgrade
Advance" and (z) in the case of a Non-Extension Advance, an "Applied
Non-Extension Advance" and, together with an Applied Downgrade Advance, an
"Applied Provider Advance") shall thereafter (subject to Section 2.06(b)) be
treated as an Interest Advance


                                       10
<PAGE>

under this Agreement for purposes of determining the Applicable Liquidity Rate
for interest payable thereon; provided further, however, that if, following the
making of a Provider Advance, the Liquidity Provider delivers a Termination
Notice to the Borrower pursuant to Section 6.01 hereof, such Provider Advance
shall thereafter be treated as a Final Advance under this Agreement for purposes
of determining the Applicable Liquidity Rate for interest payable thereon.
Subject to Sections 2.07 and 2.09 hereof, immediately upon the withdrawal of any
amounts from the Class C Cash Collateral Account on account of a reduction in
the Required Amount, the Borrower shall repay to the Liquidity Provider a
portion of the Provider Advances in a principal amount equal to such reduction,
plus interest on the principal amount prepaid as provided in Section 3.07
hereof.

            (b) At any time when an Applied Provider Advance (or any portion
thereof) is outstanding, upon the deposit in the Class C Cash Collateral Account
of any amount pursuant to clause "third" of Section 2.4(b) of the Intercreditor
Agreement, clause "third" of Section 3.2 of the Intercreditor Agreement or
clause "fourth" of Section 3.3 of the Intercreditor Agreement (any such amount
being a "Replenishment Amount") for the purpose of replenishing or increasing
the balance thereof up to the Required Amount at such time, (i) the aggregate
outstanding principal amount of all Applied Provider Advances (and of Provider
Advances treated as an Interest Advance for purposes of determining the
Applicable Liquidity Rate for interest payable thereon) shall be automatically
reduced by the amount of such Replenishment Amount and (ii) the aggregate
outstanding principal amount of all Unapplied Provider Advances shall be
automatically increased by the amount of such Replenishment Amount.

            (c) Upon the provision of a Replacement Liquidity Facility in
replacement of this Agreement in accordance with Section 3.6(e) of the
Intercreditor Agreement, amounts remaining on deposit in the Class C Cash
Collateral Account after giving effect to any Applied Provider Advance on the
date of such replacement shall be reimbursed to the Liquidity Provider, but only
to the extent such amounts are necessary to repay in full to the Liquidity
Provider all amounts owing to it hereunder.

            Section 2.07 Payments to the Liquidity Provider Under the
Intercreditor Agreement. In order to provide for payment or repayment to the
Liquidity Provider of any amounts hereunder, the Intercreditor Agreement
provides that amounts available and referred to in Articles II and III of the
Intercreditor Agreement, to the extent payable to the Liquidity Provider
pursuant to the terms of the Intercreditor Agreement (including, without
limitation, Section 3.6(f) of the Intercreditor Agreement), shall be paid to the
Liquidity Provider in accordance with the terms thereof. Amounts so paid to the
Liquidity Provider shall be applied by the Liquidity Provider to Liquidity
Obligations then due and payable in accordance with the Intercreditor Agreement
or, if not provided for in the Intercreditor Agreement, then in such manner as
the Liquidity Provider shall deem appropriate.

            Section 2.08 Book Entries. The Liquidity Provider shall maintain in
accordance with its usual practice an account or accounts evidencing the
indebtedness of the Borrower resulting from Advances made from time to time and
the amounts of principal and interest


                                       11
<PAGE>

payable hereunder and paid from time to time in respect thereof; provided,
however, that the failure by the Liquidity Provider to maintain such account or
accounts shall not affect the obligations of the Borrower in respect of
Advances.

            Section 2.09 Payments from Available Funds Only. All payments to be
made by the Borrower under this Agreement shall be made only from the amounts
that constitute Scheduled Payments, Special Payments or payments under Section
7(c) of the Participation Agreements and Section 7 of the Note Purchase
Agreement and only to the extent that the Borrower shall have sufficient income
or proceeds therefrom to enable the Borrower to make payments in accordance with
the terms hereof after giving effect to the priority of payments provisions set
forth in the Intercreditor Agreement. The Liquidity Provider agrees that it will
look solely to such amounts to the extent available for distribution to it as
provided in the Intercreditor Agreement and this Agreement and that the
Borrower, in its individual capacity, is not personally liable to it for any
amounts payable or liability under this Agreement except as expressly provided
in this Agreement, the Intercreditor Agreement or any Participation Agreement.
Amounts on deposit in the Class C Cash Collateral Account shall be available to
the Borrower to make payments under this Agreement only to the extent and for
the purposes expressly contemplated in Section 3.6(f) of the Intercreditor
Agreement.

            Section 2.10 Extension of the Expiry Date; Non-Extension Advance. No
earlier than the 60th day and no later than the 40th day prior to the then
effective Expiry Date (unless such Expiry Date is on or after the date that is
15 days after the Final Legal Distribution Date for the Class C Certificates),
the Borrower shall request that the Liquidity Provider extend the Expiry Date
for a period of 364 days after the then effective Expiry Date (unless the
obligations of the Liquidity Provider are earlier terminated in accordance with
the terms hereof). The Liquidity Provider shall advise the Borrower, no earlier
than 40 days and no later than 25 days prior to the then effective Expiry Date,
whether, in its sole discretion, it agrees to so extend the Expiry Date. If the
Liquidity Provider advises the Borrower on or before the 25th day prior to the
Expiry Date then in effect that such Expiry Date shall not be so extended, or
fails to irrevocably and unconditionally advise the Borrower on or before the
25th day prior to the Expiry Date then in effect that such Expiry Date shall be
so extended (and, in each case, if the Liquidity Provider shall not have been
replaced in accordance with Section 3.6(e) of the Intercreditor Agreement), the
Borrower shall be entitled on and after such 25th day (but prior to the then
effective Expiry Date) to request a Non-Extension Advance in accordance with
Section 2.02(b) hereof and Section 3.6(d) of the Intercreditor Agreement.

                                  ARTICLE III

                          OBLIGATIONS OF THE BORROWER

            Section 3.01 Increased Costs. If the Liquidity Provider shall
determine that (a) any change after the date hereof in any law, regulation, rule
or directive or in the interpretation thereof by any court or administrative or
governmental authority charged with the administration thereof or in the
compliance by the Liquidity Provider (or its head office) with any applicable


                                       12
<PAGE>

direction, request or requirement (whether or not having the force of law) of
any central bank or competent governmental or other authority shall either (i)
impose, modify or deem applicable any reserve, special deposit or similar
requirement against assets held by, or deposits in or for the account of, or
loans made by, the Liquidity Provider, or (ii) impose on the Liquidity Provider
any other condition regarding this Agreement or any Advance, or (iii) subject
the Liquidity Provider to any Taxes with respect to amounts payable or paid or
change the basis of taxation of any amounts payable to the Liquidity Provider
(other than Excluded Taxes) and (b) the result of any event referred to in the
preceding clauses (i), (ii) or (iii) shall be to increase the cost to the
Liquidity Provider of issuing or maintaining its commitment or funding or
maintaining Advances (which increase in cost shall be determined by the
Liquidity Provider's reasonable allocations of the aggregate of such cost
increases resulting from such event), then, upon demand by the Liquidity
Provider (such demand to be made not later than 180 days after a Responsible
Officer of the Liquidity Provider obtains actual knowledge of any event referred
to in clause (i), (ii) or (iii) above), the Borrower shall pay, or cause to be
paid, to the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such increased cost; provided that if such demand for
payment is made after such 180-day period, the Borrower shall be obligated to
pay such additional amounts only with respect to such increased cost actually
incurred or effected on or after the 180th day prior to the date of such demand.
A certificate as to such increased cost incurred by the Liquidity Provider as a
result of any event mentioned in clauses (i), (ii) or (iii) above, prepared in
reasonable detail and submitted by the Liquidity Provider to the Borrower, shall
be conclusive evidence of the amount owed under this Section, absent manifest
error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.01 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.02 Capital Adequacy. If the Liquidity Provider shall
determine that the adoption of any applicable law, rule or regulation regarding
capital adequacy, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by the Liquidity Provider (or its head office) with any request or directive
regarding capital adequacy (whether or not having the force of law) of any such
authority, central bank or comparable agency, in each case after the date
hereof, has the effect of reducing the rate of return on the Liquidity
Provider's capital as a consequence of issuing or maintaining its commitment
hereunder or its funding or maintaining Advances to a level below that which the
Liquidity Provider could have achieved but for such adoption, change or
compliance (taking into consideration the Liquidity Provider's policies with
respect to capital adequacy) by an amount deemed by the Liquidity Provider to be
material, then, upon demand by the Liquidity Provider, the Borrower shall pay to
the Liquidity Provider, from time to time as specified by the Liquidity
Provider, additional amounts which shall be sufficient to compensate the
Liquidity Provider for such reduction in respect of issuing or maintaining its
commitment hereunder or its funding or


                                       13
<PAGE>

maintaining Advances. A certificate as to any such additional amount describing
the event which has the effect of reducing the rate of return on the Liquidity
Provider's capital, prepared in reasonable detail and submitted by the Liquidity
Provider to the Borrower, shall be conclusive evidence of the amount owed under
this Section, absent manifest error.

            The Liquidity Provider agrees to use reasonable efforts (consistent
with its internal policy and legal and regulatory restrictions) to change the
jurisdiction of its Lending Office if making such change would avoid the need
for, or reduce the amount of, any amount payable under this Section 3.02 that
may thereafter accrue and would not, in the reasonable judgment of the Liquidity
Provider, be otherwise disadvantageous to the Liquidity Provider.

            Section 3.03 Payments Free of Deductions. (a) All payments made by
the Borrower under this Agreement shall be made free and clear of, and without
reduction for or on account of, any present or future stamp or other taxes,
levies, imposts, duties, charges, fees, deductions, withholdings, restrictions
or conditions of any nature whatsoever now or hereafter imposed, levied,
collected, withheld or assessed, excluding Excluded Taxes (such non-excluded
taxes being referred to herein, collectively, as "Non-Excluded Taxes" and,
individually, as a "Non-Excluded Tax"). If any Non-Excluded Taxes are required
to be withheld from any amounts payable to the Liquidity Provider under this
Agreement, the amounts so payable to the Liquidity Provider shall be increased
to the extent necessary to yield to the Liquidity Provider (after payment of all
Non-Excluded Taxes and taxes imposed on the receipt of such increase) interest
or any other such amounts payable under this Agreement at the rates or in the
amounts specified in this Agreement. The Liquidity Provider agrees to use
reasonable efforts (consistent with its internal policy and legal and regulatory
restrictions) to change the jurisdiction of its Lending Office if making such
change would avoid the need for, or reduce the amount of, any such additional
amounts that may thereafter accrue and would not, in the reasonable judgment of
the Liquidity Provider, be otherwise disadvantageous to the Liquidity Provider.
From time to time upon the reasonable request of the Borrower, the Liquidity
Provider agrees to provide to the Borrower, to the extent that the Liquidity
Provider is legally entitled to do so, two original Internal Revenue Service
Forms 1001 or 4224, as appropriate, or any successor or other form prescribed by
the Internal Revenue Service, certifying that the Liquidity Provider is exempt
from or entitled to a reduced rate of United States withholding tax on payments
pursuant to this Agreement.

            (b) All payments (including, without limitation, Advances) made by
the Liquidity Provider under this Agreement shall be made free and clear of, and
without reduction for or on account of, any Taxes. If any Taxes are required to
be withheld or deducted from any amounts payable to the Borrower under this
Agreement, the Liquidity Provider shall (i) within the time prescribed therefor
by applicable law pay to the appropriate governmental or taxing authority the
full amount of any such Taxes (and any additional Taxes in respect of the
payment required under clause (ii) hereof) and make such reports or returns in
connection therewith at the time or times and in the manner prescribed by
applicable law, and (ii) pay to the Borrower an additional amount which (after
deduction of all such Taxes) will be sufficient to yield to the Borrower the
full amount which would have been received by it had no such withholding or


                                       14
<PAGE>

deduction been made. Within 30 days after the date of each payment hereunder,
the Liquidity Provider shall furnish to the Borrower the original or a certified
copy of (or other documentary evidence of) the payment of the Taxes applicable
to such payment.

            Section 3.04 Payments. The Borrower shall make or cause to be made
each payment to the Liquidity Provider under this Agreement so as to cause the
same to be received by the Liquidity Provider not later than 1:00 P.M. (New York
City time) on the day when due. The Borrower shall make all such payments in
lawful money of the United States of America, to the Liquidity Provider in
immediately available funds, by wire transfer to Citibank, N.A., New York, N.Y.,
ABA #021000089, Account No. 4063287, Reference: Northwest Airlines Liquidity
Facility 1999-2C, Attention: Tim Smith, Global Loans.

            Section 3.05 Computations. All computations of interest based on the
Base Rate shall be made on the basis of a year of 365 or 366 days, as the case
may be, and all computations of interest based on the LIBOR Rate shall be made
on the basis of a year of 360 days, in each case for the actual number of days
(including the first day but excluding the last day) occurring in the period for
which such interest is payable.

            Section 3.06 Payment on Non-Business Days. Whenever any payment to
be made hereunder shall be stated to be due on a day other than a Business Day,
such payment shall be made on the next succeeding Business Day and no additional
interest shall be due as a result (and if so made, shall be deemed to have been
made when due). If any payment in respect of interest on an Advance is so
deferred to the next succeeding Business Day, such deferral shall not delay the
commencement of the next Interest Period for such Advance (if such Advance is a
LIBOR Advance) or reduce the number of days for which interest will be payable
on such Advance on the next interest payment date for such Advance.

            Section 3.07 Interest. (a) Subject to Section 2.09, the Borrower
shall pay, or shall cause to be paid, without duplication, interest on (i) the
unpaid principal amount of each Advance from and including the date of such
Advance (or, in the case of an Applied Provider Advance, from and including the
date on which the amount thereof was withdrawn from the Class C Cash Collateral
Account to pay interest on the Class C Certificates) to but excluding the date
such principal amount shall be paid in full (or, in the case of an Applied
Provider Advance, the date on which the Class C Cash Collateral Account is fully
replenished in respect of such Advance) and (ii) any other amount due hereunder
(whether fees, commissions, expenses or other amounts or, to the extent
permitted by law, installments of interest on Advances or any such other amount)
which is not paid when due (whether at stated maturity, by acceleration or
otherwise) from and including the due date thereof to but excluding the date
such amount is paid in full, in each such case, at a fluctuating interest rate
per annum for each day equal to the Applicable Liquidity Rate (as defined below)
for such Advance or such other amount as in effect for such day, but in no event
at a rate per annum greater than the maximum rate permitted by applicable law;
provided, however, that, if at any time the otherwise applicable interest rate
as set forth in this Section 3.07 shall exceed the maximum rate permitted by
applicable law, then any subsequent reduction in such interest rate will not
reduce the rate of interest payable pursuant to


                                       15
<PAGE>

this Section 3.07 below the maximum rate permitted by applicable law until the
total amount of interest accrued equals the amount of interest that would have
accrued if such otherwise applicable interest rate as set forth in this Section
3.07 had at all times been in effect.

            (b) Each Advance (other than any Unapplied Provider Advance) will be
either a Base Rate Advance or a LIBOR Advance as provided in this Section. Each
such Advance will be a Base Rate Advance for the period from the date of its
borrowing to (but excluding) the third Business Day following the Liquidity
Provider's receipt of the Notice of Borrowing for such Advance. Thereafter, such
Advance shall be a LIBOR Advance; provided that (i) an Applied Provider Advance
shall always be a LIBOR Advance unless the Borrower elects otherwise and (ii)
the Borrower (at the direction of the Controlling Party, so long as the
Liquidity Provider is not the Controlling Party) may (x) convert the Final
Advance into a Base Rate Advance on the last day of an Interest Period for such
Advance by giving the Liquidity Provider no less than four Business Days' prior
written notice of such election or (y) elect to maintain the Final Advance as a
Base Rate Advance by not requesting a conversion of the Final Advance to a LIBOR
Advance under Clause (5) of the applicable Notice of Borrowing (or, if such
Final Advance is deemed to have been made, without delivery of a Notice of
Borrowing pursuant to Section 2.06, by requesting, prior to 11:00 A.M. on the
first Business Day immediately following the Borrower's receipt of the
applicable Termination Notice, that such Final Advance not be converted from a
Base Rate Advance to a LIBOR Advance).

            (c) Each LIBOR Advance shall bear interest during each Interest
Period at a rate per annum equal to the LIBOR Rate for such Interest Period plus
the Applicable Margin for such LIBOR Advance, payable in arrears on the last day
of such Interest Period and, in the event of the payment of principal of such
LIBOR Advance on a day other than such last day, on the date of such payment (to
the extent of interest accrued on the amount of principal repaid).

            (d) Each Base Rate Advance shall bear interest at a rate per annum
equal to the Base Rate plus the Applicable Margin for such Base Rate Advance,
payable in arrears on each Regular Distribution Date and, in the event of the
payment of principal of such Base Rate Advance on a day other than a Regular
Distribution Date, on the date of such payment (to the extent of interest
accrued on the amount of principal repaid).

            (e) Each Unapplied Provider Advance shall bear interest in an amount
equal to the Investment Earnings on amounts on deposit in the Class C Cash
Collateral Account, payable in arrears on each Distribution Date.

            (f) Each amount not paid when due hereunder (whether fees,
commissions, expenses or other amounts or, to the extent permitted by applicable
law, installments of interest on Advances but excluding Advances) shall bear
interest at a rate per annum equal to the Base Rate plus 2.0% until paid.


                                       16
<PAGE>

            (g) Each change in the Base Rate shall become effective immediately.
The rates of interest specified in this Section 3.07 with respect to any Advance
or other amount shall be referred to as the "Applicable Liquidity Rate".

            Section 3.08 Replacement of Borrower. From time to time and subject
to the successor Borrower's meeting the eligibility requirements set forth in
Section 6.9 of the Intercreditor Agreement applicable to the Subordination
Agent, upon the effective date and time specified in a written and completed
Notice of Replacement Subordination Agent in substantially the form of Annex VI
attached hereto (a "Notice of Replacement Subordination Agent") delivered to the
Liquidity Provider by the then Borrower, the successor Borrower designated
therein shall be substituted for as the Borrower for all purposes hereunder.

            Section 3.09 Funding Loss Indemnification. The Borrower shall pay to
the Liquidity Provider, upon the request of the Liquidity Provider, such amount
or amounts as shall be sufficient (in the reasonable opinion of the Liquidity
Provider) to compensate it for any loss, cost, or expense incurred as a result
of:

            (1) Any repayment of a LIBOR Advance on a date other than the last
      day of the Interest Period for such Advance; or

            (2) Any failure by the Borrower to borrow a LIBOR Advance on the
      date for borrowing specified in the relevant notice under Section 2.02.

            Section 3.10 Illegality. Notwithstanding any other provision in this
Agreement, if any change in any applicable law, rule or regulation, or any
change in the interpretation or administration thereof by any governmental
authority, central bank or comparable agency charged with the interpretation or
administration thereof, or compliance by the Liquidity Provider (or its Lending
Office) with any request or directive (whether or not having the force of law)
of any such authority, central bank or comparable agency shall make it unlawful
or impossible for the Liquidity Provider (or its Lending Office) to maintain or
fund its LIBOR Advances, then upon notice to the Borrower by the Liquidity
Provider, the outstanding principal amount of the LIBOR Advances shall be
converted to Base Rate Advances (a) immediately upon demand of the Liquidity
Provider, if such change or compliance with such request, in the judgment of the
Liquidity Provider, requires immediate repayment; or (b) at the expiration of
the last Interest Period to expire before the effective date of any such change
or request.

                                  ARTICLE IV

                             CONDITIONS PRECEDENT

            Section 4.01 Conditions Precedent to Effectiveness of Section 2.01.
Section 2.01 of this Agreement shall become effective on and as of the first
date (the "Effective Date") on which the following conditions precedent have
been satisfied or waived:


                                       17
<PAGE>

            (a) The Liquidity Provider shall have received on or before the
      Closing Date each of the following, and in the case of each document
      delivered pursuant to paragraphs (i), (ii) and (iii), each in form and
      substance satisfactory to the Liquidity Provider:

                  (i) This Agreement duly executed on behalf of the Borrower;

                  (ii) The Intercreditor Agreement duly executed on behalf of
            each of the parties thereto;

                  (iii) Fully executed copies of each of the Operative
            Agreements executed and delivered on or before the Closing Date
            (other than this Agreement and the Intercreditor Agreement);

                  (iv) A copy of the Prospectus Supplement and specimen copies
            of the Class C Certificates;

                  (v) An executed copy of each document, instrument, certificate
            and opinion delivered on or before the Closing Date pursuant to the
            Class C Trust Agreement, the Intercreditor Agreement and the other
            Operative Agreements (in the case of each such opinion, other than
            the opinion of counsel for the Underwriters, either addressed to the
            Liquidity Provider or accompanied by a letter from the counsel
            rendering such opinion to the effect that the Liquidity Provider is
            entitled to rely on such opinion as of its date as if it were
            addressed to the Liquidity Provider);

                  (vi) Evidence that there shall have been made and shall be in
            full force and effect, all filings, recordings and/or registrations,
            and there shall have been given or taken any notice or other similar
            action as may be reasonably necessary or, to the extent reasonably
            requested by the Liquidity Provider, reasonably advisable, in order
            to establish, perfect, protect and preserve the right, title and
            interest, remedies, powers, privileges, liens and security interests
            of, or for the benefit of, the Trustees, the Borrower and the
            Liquidity Provider created by the Operative Agreements executed and
            delivered on or prior to the Closing Date;

                  (vii) A letter from Northwest Airlines Corporation, pursuant
            to which (i) Northwest Airlines Corporation agrees to provide copies
            of quarterly financial statements and audited annual financial
            statements to the Liquidity Provider, and such other information as
            the Liquidity Provider shall reasonably request with respect to the
            transactions contemplated by the Operative Agreements, in each case,
            only to the extent that Northwest Airlines Corporation is obligated
            to provide such information pursuant to Section 16 of the Leases
            (related to Leased Aircraft) or the corresponding section of the
            Indentures (related to Owned Aircraft) to the parties thereto; and


                                       18
<PAGE>

                  (viii) Such other documents, instruments, opinions and
            approvals pertaining to the transactions contemplated hereby or by
            the other Operative Agreements as the Liquidity Provider shall have
            reasonably requested.

            (b) The following statement shall be true on and as of the Effective
      Date: no event has occurred and is continuing, or would result from the
      entering into of this Agreement or the making of any Advance, which
      constitutes a Liquidity Event of Default.

            (c) The Liquidity Provider shall have received payment in full of
      all fees and other sums required to be paid to or for the account of the
      Liquidity Provider on or prior to the Effective Date.

            (d) All conditions precedent to the issuance of the Certificates
      under the Trust Agreements shall have been satisfied or waived, all
      conditions precedent to the effectiveness of the other Liquidity
      Facilities shall have been satisfied or waived, and all conditions
      precedent to the purchase of the Class A Certificates, Class B
      Certificates and Class C Certificates by the Underwriters under the
      Underwriting Agreement shall have been satisfied (unless any of such
      conditions precedent shall have been waived by the Underwriters).

            (e) The Borrower shall have received a certificate, dated the date
      hereof, signed by a duly authorized representative of the Liquidity
      Provider, certifying that all conditions precedent to the effectiveness of
      Section 2.01 have been satisfied or waived.

            Section 4.02 Conditions Precedent to Borrowing. The obligation of
the Liquidity Provider to make an Advance on the occasion of each Borrowing
shall be subject to the conditions precedent that the Effective Date shall have
occurred and, prior to the date of such Borrowing, the Borrower shall have
delivered a Notice of Borrowing which conforms to the terms and conditions of
this Agreement and has been completed as may be required by the relevant form of
the Notice of Borrowing for the type of Advances requested.

                                   ARTICLE V

                                   COVENANTS

            Section 5.01 Affirmative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will, unless the Liquidity
Provider shall otherwise consent in writing:

            (a) Performance of This and Other Agreements. Punctually pay or
      cause to be paid all amounts payable by it under this Agreement and the
      other Operative Agreements and observe and perform in all material
      respects the conditions, covenants and


                                       19
<PAGE>

      requirements applicable to it contained in this Agreement and the other
      Operative Agreements.

            (b) Reporting Requirements. Furnish to the Liquidity Provider with
      reasonable promptness, such other information and data with respect to the
      transactions contemplated by the Operative Agreements as from time to time
      may be reasonably requested by the Liquidity Provider; and permit the
      Liquidity Provider, upon reasonable notice, to inspect the Borrower's
      books and records with respect to such transactions and to meet with
      officers and employees of the Borrower to discuss such transactions.

            (c) Certain Operative Agreements. Furnish to the Liquidity Provider
      with reasonable promptness, such Operative Agreements entered into after
      the date hereof as from time to time may be reasonably requested by the
      Liquidity Provider.

            Section 5.02 Negative Covenants of the Borrower. So long as any
Advance shall remain unpaid or the Liquidity Provider shall have any Maximum
Commitment hereunder or the Borrower shall have any obligation to pay any amount
to the Liquidity Provider hereunder, the Borrower will not appoint or permit or
suffer to be appointed any successor Borrower without the prior written consent
of the Liquidity Provider, which consent shall not be unreasonably withheld or
delayed.

                                  ARTICLE VI

                          LIQUIDITY EVENTS OF DEFAULT

            Section 6.01 Liquidity Events of Default. If (a) any Liquidity Event
of Default has occurred and is continuing and (b) there is a Performing Note
Deficiency, the Liquidity Provider may, in its discretion, deliver to the
Borrower a Termination Notice, the effect of which shall be to cause (i) this
Agreement to expire on the fifth Business Day after the date on which such
Termination Notice is received by the Borrower, (ii) the Borrower to promptly
request, and the Liquidity Provider to promptly make, a Final Advance in
accordance with Section 2.02(d) hereof and Section 3.6(i) of the Intercreditor
Agreement, (iii) all other outstanding Advances to be automatically converted
into Final Advances for purposes of determining the Applicable Liquidity Rate
for interest payable thereon, and (iv) subject to Sections 2.07 and 2.09 hereof,
all Advances (including, without limitation, any Provider Advance and Applied
Provider Advance), any accrued interest thereon and any other amounts
outstanding hereunder to become immediately due and payable to the Liquidity
Provider.


                                       20
<PAGE>

                                  ARTICLE VII

                                 MISCELLANEOUS

            Section 7.01 Amendments, Etc. No amendment or waiver of any
provision of this Agreement, nor consent to any departure by the Borrower
therefrom, shall in any event be effective unless the same shall be in writing
and signed by the Liquidity Provider, and, in the case of an amendment or of a
waiver by the Borrower, the Borrower, and then such waiver or consent shall be
effective only in the specific instance and for the specific purpose for which
given.

            Section 7.02 Notices, Etc. Except as otherwise expressly provided
herein, all notices and other communications provided for hereunder shall be in
writing (including telecopier and mailed or delivered or sent by telecopier):

            Borrower:   STATE STREET BANK AND TRUST COMPANY
                        Two International Place
                        4th Floor
                        Boston, Massachusetts  02110
                        Attention:  Corporate Trust Administration
                        Telecopy:   (617) 664-5151

  Liquidity Provider:   CITIBANK, N.A.
                        Two Penns' Way, Suite 200
                        New Castle, DE  19720
                        Attention:  Tim Smith, Global Loans
                        Telecopy: (302) 894-6120

                        with a copy to:

                        CITIBANK, N.A.
                        Global Aviation
                        399 Park Avenue, 12th Floor
                        New York, New York  10043
                        Attention:  Tom Boyle
                        Telecopy:  (212) 793-1246

or, as to each of the foregoing, at such other address as shall be designated by
such Person in a written notice to the others. All such notices and
communications shall be effective (i) if given by telecopier, when transmitted
to the telecopier number specified above, (ii) if given by mail, when deposited
in the mails addressed as specified above, and (iii) if given by other means,
when delivered at the address specified above, except that written notices to
the Liquidity Provider pursuant to the provisions of Articles II and III hereof
shall not be effective until received by the Liquidity Provider. A copy of all
notices delivered hereunder to either party shall in addition be


                                      21

<PAGE>



delivered to each of the parties to the Participation Agreements at their
respective addresses set forth therein.

            Section 7.03 No Waiver; Remedies. No failure on the part of the
Liquidity Provider to exercise, and no delay in exercising, any right under this
Agreement shall operate as a waiver thereof; nor shall any single or partial
exercise of any right under this Agreement preclude any other or further
exercise thereof or the exercise of any other right. The remedies herein
provided are cumulative and not exclusive of any remedies provided by law.

            Section 7.04 Further Assurances. The Borrower agrees to do such
further acts and things and to execute and deliver to the Liquidity Provider
such additional assignments, agreements, powers and instruments as the Liquidity
Provider may reasonably require or deem advisable to carry into effect the
purposes of this Agreement and the other Operative Agreements or to better
assure and confirm unto the Liquidity Provider its rights, powers and remedies
hereunder and under the other Operative Agreements.

            Section 7.05 Indemnification; Survival of Certain Provisions. The
Liquidity Provider shall be indemnified hereunder to the extent and in the
manner described in Section 7(c) of the Participation Agreements. In addition,
the Borrower agrees to indemnify, protect, defend and hold harmless the
Liquidity Provider from, against and in respect of, and shall pay on demand, all
Expenses of any kind or nature whatsoever (other than any Expenses of the nature
described in Sections 3.01, 3.02 or 7.07 hereof (regardless of whether
indemnified against pursuant to said Sections)), that may be imposed, incurred
by or asserted against any Liquidity Indemnitee, in any way relating to,
resulting from, or arising out of or in connection with any action, suit or
proceeding by any third party against such Liquidity Indemnitee and relating to
this Agreement, the Intercreditor Agreement or any Financing Agreement;
provided, however, that the Borrower shall not be required to indemnify,
protect, defend and hold harmless any Liquidity Indemnitee in respect of any
Expense of such Liquidity Indemnitee to the extent such Expense is (i)
attributable to the gross negligence or willful misconduct of such Liquidity
Indemnitee or any other Liquidity Indemnitee, (ii) ordinary and usual operating
overhead expense, or (iii) attributable to the failure by such Liquidity
Indemnitee or any other Liquidity Indemnitee to perform or observe any
agreement, covenant or condition on its part to be performed or observed in this
Agreement, the Intercreditor Agreement or any other Operative Agreement to which
it is a party. The indemnities contained in Section 7(c) of the Participation
Agreements, and the provisions of Sections 3.01, 3.02, 3.03, 7.05 and 7.07
hereof, shall survive the termination of this Agreement.

            Section 7.06 Liability of the Liquidity Provider. (a) Neither the
Liquidity Provider nor any of its officers, employees, directors or affiliates
shall be liable or responsible for: (i) the use which may be made of the
Advances or any acts or omissions of the Borrower or any beneficiary or
transferee in connection therewith; (ii) the validity, sufficiency or
genuineness of documents, or of any endorsement thereon, even if such documents
should prove to be in any or all respects invalid, insufficient, fraudulent or
forged; or (iii) the making of Advances by the Liquidity Provider against
delivery of a Notice of Borrowing and other documents which do not


                                       22

<PAGE>

comply with the terms hereof; provided, however, that the Borrower shall have a
claim against the Liquidity Provider, and the Liquidity Provider shall be liable
to the Borrower, to the extent of any damages suffered by the Borrower which
were the result of (A) the Liquidity Provider's willful misconduct or negligence
in determining whether documents presented hereunder comply with the terms
hereof, or (B) any breach by the Liquidity Provider of any of the terms of this
Agreement, including, but not limited to, the Liquidity Provider's failure to
make lawful payment hereunder after the delivery to it by the Borrower of a
Notice of Borrowing strictly complying with the terms and conditions hereof.

            (b) Neither the Liquidity Provider nor any of its officers,
employees, directors or affiliates shall be liable or responsible in any respect
for (i) any error, omission, interruption or delay in transmission, dispatch or
delivery of any message or advice, however transmitted, in connection with this
Agreement or any Notice of Borrowing delivered hereunder, or (ii) any action,
inaction or omission which may be taken by it in good faith, absent willful
misconduct or negligence (in which event the extent of the Liquidity Provider's
potential liability to the Borrower shall be limited as set forth in the
immediately preceding paragraph), in connection with this Agreement or any
Notice of Borrowing.

            Section 7.07 Costs, Expenses and Taxes. The Borrower agrees to pay,
or cause to be paid (A) on the Effective Date and on such later date or dates on
which the Liquidity Provider shall make demand, all reasonable out-of-pocket
costs and expenses (including, without limitation, the reasonable fees and
expenses of outside counsel for the Liquidity Provider) of the Liquidity
Provider in connection with the preparation, negotiation, execution, delivery,
filing and recording of this Agreement, any other Operative Agreement and any
other documents which may be delivered in connection with this Agreement and (B)
on demand, all reasonable costs and expenses (including reasonable counsel fees
and expenses) of the Liquidity Provider in connection with (i) the enforcement
of this Agreement or any other Operative Agreement, (ii) the modification or
amendment of, or supplement to, this Agreement or any other Operative Agreement
or such other documents which may be delivered in connection herewith or
therewith (whether or not the same shall become effective) or (iii) any action
or proceeding relating to any order, injunction, or other process or decree
restraining or seeking to restrain the Liquidity Provider from paying any amount
under this Agreement, the Intercreditor Agreement or any other Operative
Agreement or otherwise affecting the application of funds in the Class C Cash
Collateral Account. In addition, the Borrower shall pay any and all recording,
stamp and other similar taxes and fees payable or determined to be payable in
connection with the execution, delivery, filing and recording of this Agreement,
any other Operative Agreement and such other documents, and agrees to save the
Liquidity Provider harmless from and against any and all liabilities with
respect to or resulting from any delay in paying or omission to pay such taxes
or fees.

            Section 7.08 Binding Effect; Participations. (a) This Agreement
shall be binding upon and inure to the benefit of the Borrower and the Liquidity
Provider and their respective successors and assigns, except that neither the
Liquidity Provider (except as otherwise provided in this Section 7.08) nor
(except as contemplated by Section 3.08) the Borrower shall have the


                                      23

<PAGE>

right to assign its rights or obligations hereunder or any interest herein
without the prior written consent of the other party, subject to the
requirements of Section 7.08(b). The Liquidity Provider may grant participations
herein or in any of its rights hereunder (including, without limitation, funded
participations and participations in rights to receive interest payments
hereunder) and under the other Operative Agreements to such Persons as the
Liquidity Provider may in its sole discretion select (but excluding Northwest
and any of its affiliates), subject to the requirements of Section 7.08(b). No
such participation by the Liquidity Provider, however, will relieve the
Liquidity Provider of its obligations hereunder. In connection with any
participation or any proposed participation, the Liquidity Provider may disclose
to the participant or the proposed participant any information that the Borrower
is required to deliver or to disclose to the Liquidity Provider pursuant to this
Agreement. The Borrower acknowledges and agrees that the Liquidity Provider's
source of funds may derive in part from its participants. Accordingly,
references in this Agreement and the other Operative Agreements to
determinations, reserve and capital adequacy requirements, increased costs,
reduced receipts, additional amounts due pursuant to Section 3.03(a) and the
like as they pertain to the Liquidity Provider shall be deemed also to include
those of each of its participants (subject, in each case, to the maximum amount
that would have been incurred by or attributable to the Liquidity Provider
directly if the Liquidity Provider, rather than the participant, had held the
interest participated).

            (b) If, pursuant to subsection (a) above, the Liquidity Provider
sells any participation in this Agreement to any bank or other entity (each, a
"Transferee"), then, concurrently with the effectiveness of such participation,
the Transferee shall (i) represent to the Liquidity Provider (for the benefit of
the Liquidity Provider and the Borrower) either (A) that it is incorporated
under the laws of the United States or a state thereof or (B) that under
applicable law and treaties, no taxes will be required to be withheld with
respect to any payments to be made to such Transferee in respect of this
Agreement, (ii) furnish to the Liquidity Provider and the Borrower either (x) a
statement that it is incorporated under the laws of the United States or a state
thereof or (y) if it is not so incorporated, two copies of a properly completed
United States Internal Revenue Service Form 4224 or Form 1001, as appropriate,
or other applicable form, certificate or document prescribed by the Internal
Revenue Service certifying, in each case, such Transferee's entitlement to a
complete exemption from United States federal withholding tax in respect to any
and all payments to be made hereunder, and (iii) agree (for the benefit of the
Liquidity Provider and the Borrower) to provide the Liquidity Provider and the
Borrower a new Form 4224 or Form 1001, as appropriate, (A) on or before the date
that any such form expires or becomes obsolete or (B) after the occurrence of
any event requiring a change in the most recent form previously delivered by it
and prior to the immediately following due date of any payment by the Borrower
hereunder, certifying in the case of a Form 1001 or Form 4224 that such
Transferee is entitled to a complete exemption from United States federal
withholding tax on payments under this Agreement. Unless the Borrower has
received forms or other documents reasonably satisfactory to it (and required by
applicable law) indicating that payments hereunder are not subject to United
States federal withholding tax, the Borrower will withhold taxes as required by
law from such payments at the applicable statutory rate.


                                      24

<PAGE>

            (c) Notwithstanding the other provisions of this Section 7.08, the
Liquidity Provider may assign and pledge all or any portion of the Advances
owing to it to any Federal Reserve Bank or the United States Treasury as
collateral security pursuant to Regulation A of the Board of Governors of the
Federal Reserve System and any Operating Circular issued by such Federal Reserve
Bank, provided that any payment in respect of such assigned Advances made by the
Borrower to the Liquidity Provider in accordance with the terms of this
Agreement shall satisfy the Borrower's obligations hereunder in respect of such
assigned Advance to the extent of such payment. No such assignment shall release
the Liquidity Provider from its obligations hereunder.

            Section 7.09 Severability. Any provision of this Agreement which is
prohibited, unenforceable or not authorized in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition,
unenforceability or non-authorization without invalidating the remaining
provisions hereof or affecting the validity, enforceability or legality of such
provision in any other jurisdiction.

            Section 7.10 GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

            Section 7.11 Submission to Jurisdiction; Waiver of Jury Trial;
Waiver of Immunity. (a) Each of the parties hereto hereby irrevocably and
unconditionally:

            (i) submits for itself and its property in any legal action or
      proceeding relating to this Agreement or any other Operative Agreement, or
      for recognition and enforcement of any judgment in respect hereof or
      thereof, to the nonexclusive general jurisdiction of the courts of the
      State of New York, the courts of the United States of America for the
      Southern District of New York, and the appellate courts from any thereof;

            (ii) consents that any such action or proceeding may be brought in
      such courts, and waives any objection that it may now or hereafter have to
      the venue of any such action or proceeding in any such court or that such
      action or proceeding was brought in an inconvenient court and agrees not
      to plead or claim the same;

            (iii) agrees that service of process in any such action or
      proceeding may be effected by mailing a copy thereof by registered or
      certified mail (or any substantially similar form and mail), postage
      prepaid, to each party hereto at its address set forth in Section 7.02
      hereof, or at such other address of which the Liquidity Provider shall
      have been notified pursuant thereto; and

            (iv) agrees that nothing herein shall affect the right to effect
      service of process in any other manner permitted by law or shall limit the
      right to sue in any other jurisdiction.


                                      25

<PAGE>

            (b) THE BORROWER AND THE LIQUIDITY PROVIDER EACH HEREBY AGREE TO
WAIVE THEIR RESPECTIVE RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION
BASED UPON OR ARISING OUT OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM
RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT AND THE RELATIONSHIP THAT IS
BEING ESTABLISHED, including, without limitation, contract claims, tort claims,
breach of duty claims and all other common law and statutory claims. The
Borrower and the Liquidity Provider each warrant and represent that it has
reviewed this waiver with its legal counsel, and that it knowingly and
voluntarily waives its jury trial rights following consultation with such legal
counsel. THIS WAIVER IS IRREVOCABLE, AND CANNOT BE MODIFIED EITHER ORALLY OR IN
WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT AMENDMENTS, RENEWALS,
SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.

            Section 7.12 Execution in Counterparts. This Agreement may be
executed in any number of counterparts and by different parties hereto on
separate counterparts, each of which counterparts, when so executed and
delivered, shall be deemed to be an original and all of which counterparts,
taken together, shall constitute but one and the same Agreement.

            Section 7.13 Entirety. This Agreement, the Intercreditor Agreement
and the other Operative Agreements to which the Liquidity Provider is a party
constitute the entire agreement of the parties hereto with respect to the
subject matter hereof and supersedes all prior understandings and agreements of
such parties.

            Section 7.14 Headings. Section headings in this Agreement are
included herein for convenience of reference only and shall not constitute a
part of this Agreement for any other purpose.

            Section 7.15 LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES.
EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE OBLIGATIONS OF THE
LIQUIDITY PROVIDER TO MAKE ADVANCES HEREUNDER, AND THE BORROWER'S RIGHTS TO
DELIVER NOTICES OF BORROWING REQUESTING THE MAKING OF ADVANCES HEREUNDER, SHALL
BE UNCONDITIONAL AND IRREVOCABLE, AND SHALL BE PAID OR PERFORMED, IN EACH CASE
STRICTLY IN ACCORDANCE WITH THE TERMS OF THIS AGREEMENT.

                                (End of Page)


                                      26

<PAGE>

            IN WITNESS WHEREOF, the parties have caused this Agreement to be
duly executed and delivered by their respective officers thereunto duly
authorized as of the date first set forth above.

                                   STATE STREET BANK AND TRUST COMPANY, not in
                                         its individual capacity but solely
                                         as Subordination Agent, as Borrower


                                   By: /s/ DONALD E. SMITH
                                       ---------------------------------------
                                         Name:  DONALD E. SMITH
                                         Title: VICE PRESIDENT


                                   CITIBANK, N.A., as Liquidity Provider


                                   By: /s/ Thomas Boyle
                                       ---------------------------------------
                                         Name:  THOMAS BOYLE
                                         Title: Managing Director
                                                Global Aviation
                                                399P/12/2
                                                (212) 559-6149


                                       27
<PAGE>

                                                                    Annex I to
                                                    Revolving Credit Agreement

                     INTEREST ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2C) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of an Interest Advance by the Liquidity Provider to be used,
      subject to clause (3)(v) below, for the payment of the interest on the
      Class C Certificates which was payable on ____________, ____ (the
      "Distribution Date") in accordance with the terms and provisions of the
      Class C Trust Agreement and the Class C Certificates, which Advance is
      requested to be made on ____________, ____.

            (3) The amount of the Interest Advance requested hereby (i) is
      $_______________.__, to be applied in respect of the payment of the
      interest which was due and payable on the Class C Certificates on the
      Distribution Date, (ii) does not include any amount with respect to the
      payment of principal of, or premium on, the Class A Certificates, the
      Class B Certificates or the Class C Certificates, or interest on the Class
      A Certificates or the Class B Certificates, (iii) was computed in
      accordance with the provisions of the Certificates, the Class C Trust
      Agreement and the Intercreditor Agreement (a copy of which computation is
      attached hereto as Schedule I), (iv) does not exceed the Maximum Available
      Commitment on the date hereof, (v) does not include any amount of interest
      which was due and payable on the Class C Certificates on such Distribution
      Date but which remains unpaid due to the failure of the Depositary to pay
      any amount of accrued interest on the Deposits on such Distribution Date
      and (vi) has not been and is not the subject of a prior or contemporaneous
      Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will apply the same in accordance with
      the terms of Section 3.6(b) of the Intercreditor Agreement, (b) no portion
      of such amount shall be applied by the Borrower for any other purpose and
      (c) no portion of such amount until so applied shall be commingled with
      other funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, the making of the Interest Advance as requested by this Notice of
Borrowing shall automatically


                                     I-1

<PAGE>

reduce, subject to reinstatement in accordance with the terms of the Liquidity
Agreement, the Maximum Available Commitment by an amount equal to the amount of
the Interest Advance requested to be made hereby as set forth in clause (i) of
paragraph (3) of this Notice of Borrowing and such reduction shall automatically
result in corresponding reductions in the amounts available to be borrowed
pursuant to a subsequent Advance.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.


                                   STATE STREET BANK AND TRUST
                                   COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:


                                       I-2

<PAGE>

               SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

                [Insert Copy of Computations in accordance with
                     Interest Advance Notice of Borrowing]


                                     I-3

<PAGE>

                                                                     Annex II to
                                                      Revolving Credit Agreement

                   NON-EXTENSION ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2C) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Non-Extension Advance by the Liquidity Provider to be used
      for the funding of the Class C Cash Collateral Account in accordance with
      Section 3.6(d) of the Intercreditor Agreement, which Advance is requested
      to be made on __________, ____.

            (3) The amount of the Non-Extension Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class C
      Cash Collateral Account in accordance with Section 3.6(d) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class C Certificates,
      or principal of, or interest or premium on, the Class A Certificates or
      the Class B Certificates, (iii) was computed in accordance with the
      provisions of the Class C Certificates, the Class C Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class C
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(d) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
      Agreement, (A) the making of the Non-Extension Advance as requested by
      this Notice of Borrowing shall automatically and irrevocably terminate the
      obligation of the Liquidity Provider to make further Advances under the
      Liquidity Agreement; and (B) following the making by the Liquidity
      Provider of the Non-Extension Advance requested by this Notice of


                                     II-1

<PAGE>

      Borrowing, the Borrower shall not be entitled to request any further
      Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                   STATE STREET BANK AND TRUST
                                   COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:


                                      II-2

<PAGE>

            SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

                [Insert Copy of computations in accordance with
                   Non-Extension Advance Notice of Borrowing]


                                      II-3

<PAGE>

                                                                    Annex III to
                                                      Revolving Credit Agreement

                     DOWNGRADE ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
subordination agent (the "Borrower"), hereby certifies to CITIBANK, N.A. (the
"Liquidity Provider"), with reference to the Revolving Credit Agreement
(1999-2C) dated as of June 25, 1999, between the Borrower and the Liquidity
Provider (the "Liquidity Agreement"; the terms defined therein and not otherwise
defined herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Downgrade Advance by the Liquidity Provider to be used for
      the funding of the Class C Cash Collateral Account in accordance with
      Section 3.6(c) of the Intercreditor Agreement by reason of the downgrading
      of the short-term unsecured debt rating of the Liquidity Provider issued
      by either Rating Agency below the Threshold Rating, which Advance is
      requested to be made on __________, ____.

            (3) The amount of the Downgrade Advance requested hereby (i) is
      $_______________.__, which equals the Maximum Available Commitment on the
      date hereof and is to be applied in respect of the funding of the Class C
      Cash Collateral Account in accordance with Section 3.6(c) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of the principal of, or premium on, the Class C Certificates,
      or principal of, or interest or premium on, the Class A Certificates or
      the Class B Certificates, (iii) was computed in accordance with the
      provisions of the Class C Certificates, the Class C Trust Agreement and
      the Intercreditor Agreement (a copy of which computation is attached
      hereto as Schedule I), and (iv) has not been and is not the subject of a
      prior or contemporaneous Notice of Borrowing under the Liquidity
      Agreement.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class C
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(c) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Downgrade Advance as requested by this Notice
of Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity


                                      III-1

<PAGE>

Provider of the Downgrade Advance requested by this Notice of Borrowing, the
Borrower shall not be entitled to request any further Advances under the
Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.

                                   STATE STREET BANK AND TRUST
                                   COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:


                                      III-2

<PAGE>

              SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

                [Insert Copy of computations in accordance with
                     Downgrade Advance Notice of Borrowing]


                                    III-3

<PAGE>

                                                                     Annex IV to
                                                      Revolving Credit Agreement

                       FINAL ADVANCE NOTICE OF BORROWING

            The undersigned, a duly authorized signatory of the undersigned
borrower (the "Borrower"), hereby certifies to CITIBANK, N.A. (the "Liquidity
Provider"), with reference to the Revolving Credit Agreement (1999-2C) dated as
of June 25, 1999, between the Borrower and the Liquidity Provider (the
"Liquidity Agreement"; the terms defined therein and not otherwise defined
herein being used herein as therein defined or referenced), that:

            (1) The Borrower is the Subordination Agent under the Intercreditor
      Agreement.

            (2) The Borrower is delivering this Notice of Borrowing for the
      making of the Final Advance by the Liquidity Provider to be used for the
      funding of the Class C Cash Collateral Account in accordance with Section
      3.6(i) of the Intercreditor Agreement by reason of the receipt by the
      Borrower of a Termination Notice from the Liquidity Provider with respect
      to the Liquidity Agreement, which Advance is requested to be made on
      ____________, ____.

            (3) The amount of the Final Advance requested hereby (i) is
      $_________________.__, which equals the Maximum Available Commitment on
      the date hereof and is to be applied in respect of the funding of the
      Class C Cash Collateral Account in accordance with Section 3.6(i) of the
      Intercreditor Agreement, (ii) does not include any amount with respect to
      the payment of principal of, or premium on, the Class C Certificates, or
      principal of, or interest or premium on, the Class A Certificates or the
      Class B Certificates, (iii) was computed in accordance with the provisions
      of the Class C Certificates, the Class C Trust Agreement and the
      Intercreditor Agreement (a copy of which computation is attached hereto as
      Schedule I), and (iv) has not been and is not the subject of a prior or
      contemporaneous Notice of Borrowing.

            (4) Upon receipt by or on behalf of the Borrower of the amount
      requested hereby, (a) the Borrower will deposit such amount in the Class C
      Cash Collateral Account and apply the same in accordance with the terms of
      Section 3.6(i) of the Intercreditor Agreement, (b) no portion of such
      amount shall be applied by the Borrower for any other purpose and (c) no
      portion of such amount until so applied shall be commingled with other
      funds held by the Borrower.


                                     IV-1

<PAGE>

            (5) The Borrower hereby requests that the Advance requested hereby
      be a Base Rate Advance [and that such Base Rate Advance be converted into
      a LIBOR Advance on the third Business Day following your receipt of this
      notice](1).

            The Borrower hereby acknowledges that, pursuant to the Liquidity
Agreement, (A) the making of the Final Advance as requested by this Notice of
Borrowing shall automatically and irrevocably terminate the obligation of the
Liquidity Provider to make further Advances under the Liquidity Agreement; and
(B) following the making by the Liquidity Provider of the Final Advance
requested by this Notice of Borrowing, the Borrower shall not be entitled to
request any further Advances under the Liquidity Agreement.

            IN WITNESS WHEREOF, the Borrower has executed and delivered this
Notice of Borrowing as of the ____ day of _________, ____.


                                   STATE STREET BANK AND TRUST
                                   COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:

- ----------
(1) Bracketed language may be included at Borrower's option.


                                      IV-2

<PAGE>

                SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

                [Insert Copy of Computations in accordance with
                       Final Advance Notice of Borrowing]


                                     IV-3

<PAGE>

                                                                      Annex V to
                                                      Revolving Credit Agreement

                             NOTICE OF TERMINATION

                                                      [Date]

State Street Bank and Trust Company,
  as Subordination Agent, as Borrower
Two International Place, 4th Floor
Boston, MA 02110


Attention:  Corporate Trust Administration


      Revolving Credit Agreement (1999-2C) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            You are hereby notified that pursuant to Section 6.01 of the
Liquidity Agreement, by reason of the occurrence of a Liquidity Event of Default
and the existence of a Performing Note Deficiency (each as defined therein), we
are giving this notice to you in order to cause (i) our obligations to make
Advances (as defined therein) under such Liquidity Agreement to terminate on the
fifth Business Day after the date on which you receive this notice and (ii) you
to request a Final Advance under the Liquidity Agreement pursuant to Section
3.6(i) of the Intercreditor Agreement (as defined in the Liquidity Agreement) as
a consequence of your receipt of this notice.


                                     V-1

<PAGE>

            THIS NOTICE IS THE "NOTICE OF TERMINATION" PROVIDED FOR UNDER THE
LIQUIDITY AGREEMENT. OUR OBLIGATIONS TO MAKE ADVANCES UNDER THE LIQUIDITY
AGREEMENT WILL TERMINATE ON THE FIFTH BUSINESS DAY AFTER THE DATE ON WHICH YOU
RECEIVE THIS NOTICE.

                                   Very truly yours,

                                   CITIBANK, N.A.,  as Liquidity Provider

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:


cc:   State Street Bank and Trust Company of
      Connecticut, National Association,
        as Class C Trustee


                                     V-2

<PAGE>

                                                                     Annex VI to
                                                      Revolving Credit Agreement

                   NOTICE OF REPLACEMENT SUBORDINATION AGENT


[Date]
Attention:


      Revolving Credit Agreement (1999-2C) dated as of June 25, 1999, between
      State Street Bank and Trust Company, as Subordination Agent, as Borrower,
      and CITIBANK, N.A. (the "Liquidity Agreement")

Ladies and Gentlemen:

            For value received, the undersigned beneficiary hereby irrevocably
transfers to:

                         ------------------------------
                              [Name of Transferee]


                         ------------------------------
                             [Address of Transferee]

all rights and obligations of the undersigned as Borrower under the Liquidity
Agreement referred to above. The transferee has succeeded the undersigned as
Subordination Agent under the Intercreditor Agreement referred to in the first
paragraph of the Liquidity Agreement, pursuant to the terms of Section 8.1 of
the Intercreditor Agreement.

            By this transfer, all rights of the undersigned as Borrower under
the Liquidity Agreement are transferred to the transferee and the transferee
shall hereafter have the sole rights and obligations as Borrower thereunder. The
undersigned shall pay any costs and expenses of such transfer, including, but
not limited to, transfer taxes or governmental charges.


                                     VI-1

<PAGE>

            We ask that this transfer be effective as of _______________, ____.

                                   STATE STREET BANK AND TRUST
                                   COMPANY,
                                         not in its individual capacity but
                                         solely as Subordination Agent, as
                                         Borrower

                                   By:
                                       ---------------------------------------
                                         Name:
                                         Title:


                                      VI-2



                                                                    EXHIBIT 4(d)

                                                                  EXECUTION COPY

                             INTERCREDITOR AGREEMENT

                                   Dated as of

                                  June 25, 1999

                                  BY AND AMONG

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,

                         not in its individual capacity
                         but solely as Trustee under the
                 Northwest Airlines Pass Through Trust 1999-2A,
                  Northwest Airlines Pass Through Trust 1999-2B
                                       and
                  Northwest Airlines Pass Through Trust 1999-2C

                                 CITIBANK, N.A.

                          as Class A Liquidity Provider
                           Class B Liquidity Provider
                                       and
                           Class C Liquidity Provider,

                                       AND

                       STATE STREET BANK AND TRUST COMPANY

                      not in its individual capacity except
                        as expressly set forth herein but
               solely as Subordination Agent and trustee hereunder

<PAGE>

                               TABLE OF CONTENTS

                                                                           Page
                                                                           ----
                                    ARTICLE I

DEFINITIONS

      SECTION 1.1  Definitions...............................................2

                                   ARTICLE II

TRUST ACCOUNTS; CONTROLLING PARTY

      SECTION 2.1  Agreement to Terms of Subordination; Payments from
                   Monies Received Only.....................................20
      SECTION 2.2  Trust Accounts...........................................21
      SECTION 2.3  Deposits to the Collection Account and Special
                   Payments Account ........................................22
      SECTION 2.4  Distributions of Special Payments........................22
      SECTION 2.5  Designated Representatives...............................25
      SECTION 2.6  Controlling Party........................................25

                                  ARTICLE III

RECEIPT, DISTRIBUTION AND APPLICATION OF
AMOUNTS RECEIVED

      SECTION 3.1  Written Notice of Distribution...........................27
      SECTION 3.2  Distribution of Amounts on Deposit in the Collection
                   Account .................................................29
      SECTION 3.3  Distribution of Amounts on Deposit Following a
                   Triggering Event ........................................30
      SECTION 3.4  Other Payments...........................................32
      SECTION 3.5  Payments to the Trustees and the Liquidity Providers.....33
      SECTION 3.6  Liquidity Facilities.....................................33

                                  ARTICLE IV

EXERCISE OF REMEDIES

      SECTION 4.1  Directions from the Controlling Party....................38
      SECTION 4.2  Remedies Cumulative......................................39
      SECTION 4.3  Discontinuance of Proceedings............................40
      SECTION 4.4  Right of Certificateholders to Receive Payments Not
                   to Be Impaired ..........................................40
      SECTION 4.5  Undertaking for Costs....................................40


                                    -i-

<PAGE>

                                                                            Page
                                                                            ----

                                    ARTICLE V

DUTIES OF THE SUBORDINATION AGENT;
AGREEMENTS OF TRUSTEES, ETC.

      SECTION 5.1  Notice of Indenture Default or Triggering Event..........40
      SECTION 5.2  Indemnification..........................................41
      SECTION 5.3  No Duties Except as Specified in Intercreditor Agreement.41
      SECTION 5.4  Notice from the Liquidity Providers and Trustees.........41

                                   ARTICLE VI

THE SUBORDINATION AGENT

      SECTION 6.1  Authorization; Acceptance of Trusts and Duties...........42
      SECTION 6.2  Absence of Duties........................................42
      SECTION 6.3  No Representations or Warranties as to Documents.........42
      SECTION 6.4  No Segregation of Monies; No Interest....................42
      SECTION 6.5  Reliance; Agents; Advice of Counsel......................43
      SECTION 6.6  Capacity in Which Acting.................................43
      SECTION 6.7  Compensation.............................................43
      SECTION 6.8  May Become Certificateholder.............................43
      SECTION 6.9  Subordination Agent Required; Eligibility................44
      SECTION 6.10  Money to Be Held in Trust...............................44

                                   ARTICLE VII

INDEMNIFICATION OF SUBORDINATION AGENT

      SECTION 7.1  Scope of Indemnification.................................44

                                  ARTICLE VIII

SUCCESSOR SUBORDINATION AGENT

      SECTION 8.1  Replacement of Subordination Agent; Appointment of
                   Successor ...............................................45

                                  ARTICLE IX

SUPPLEMENTS AND AMENDMENTS

      SECTION 9.1  Amendments, Waivers, Etc.................................46
      SECTION 9.2  Subordination Agent Protected............................47
      SECTION 9.3  Effect of Supplemental Agreements........................47


                                      -ii-

<PAGE>

                                                                          Page
                                                                          ----

      SECTION 9.4  Notice to Rating Agencies................................47
      SECTION 9.5 Addition of Class D Trustee...............................47

                                   ARTICLE X

MISCELLANEOUS

      SECTION 10.1  Termination of Intercreditor Agreement..................48
      SECTION 10.2  Intercreditor Agreement for Benefit of Trustees,
                    Liquidity Providers and Subordination Agent.............48
      SECTION 10.3  Notices.................................................49
      SECTION 10.4  Severability............................................50
      SECTION 10.5  No Oral Modifications or Continuing Waivers.............50
      SECTION 10.6  Successors and Assigns..................................50
      SECTION 10.7  Headings................................................50
      SECTION 10.8  Counterpart Form........................................50
      SECTION 10.9  Subordination...........................................50
      SECTION 10.10 Governing Law...........................................51
      SECTION 10.11 Submission to Jurisdiction; Waiver of Jury Trial;
                    Waiver of Immunity......................................51

Schedule 1  Participation Agreements


                                    -iii-

<PAGE>

                            INTERCREDITOR AGREEMENT

            INTERCREDITOR AGREEMENT dated as of June 25, 1999, by and among
STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT, NATIONAL ASSOCIATION, a
national banking association ("State Street of Connecticut"), not in its
individual capacity but solely as Trustee of each Trust (each as defined below),
CITIBANK, N.A. ("Citibank"), as Class A Liquidity Provider, Citibank, as Class B
Liquidity Provider, Citibank, as Class C Liquidity Provider, and STATE STREET
BANK AND TRUST COMPANY, a Massachusetts trust company, not in its individual
capacity except as expressly set forth herein, but solely as Subordination Agent
and trustee hereunder (in such capacity, together with any successor appointed
pursuant to Article VIII hereof, the "Subordination Agent").

            WHEREAS, all capitalized terms used herein shall have the respective
meanings referred to in Article I hereof;

            WHEREAS, pursuant to each Indenture (i) in the case of each Aircraft
that is owned by Northwest at the time such Indenture is entered into (the
"Owned Aircraft"), Northwest will issue on a recourse basis three series of
Equipment Notes to finance the purchase of such Aircraft, and (ii) in the case
of each Aircraft that is leased to Northwest pursuant to a related Lease at the
time such Indenture is entered into (the "Leased Aircraft"), the related Owner
Trustee will issue on a nonrecourse basis three series of Equipment Notes to
finance the purchase of such Aircraft;

            WHEREAS, pursuant to the Financing Agreements, each Trust will
acquire Equipment Notes having an interest rate equal to the interest rate
applicable to the Certificates to be issued by such Trust;

            WHEREAS, pursuant to each Trust Agreement, the Trust created thereby
proposes to issue a single class of Certificates (a "Class") bearing the
interest rate and having the final distribution date described in such Trust
Agreement on the terms and subject to the conditions set forth therein;

            WHEREAS, pursuant to the Underwriting Agreement (as defined below),
the Underwriters propose to purchase the Certificates issued by each Trust in
the aggregate face amount set forth opposite the name of such Trust on Schedule
I thereto on the terms and subject to the conditions set forth therein;

            WHEREAS, each Liquidity Provider proposes to enter into a revolving
credit agreement (each, a "Liquidity Facility") with the Subordination Agent, as
agent for the Trustee of each Trust, for the benefit of the Certificateholders
of such Trust; and

            WHEREAS, it is a condition precedent to the obligations of the
Underwriters under the Underwriting Agreement that the Subordination Agent, the
Trustees and the Liquidity Providers agree to the terms of subordination set
forth in this Agreement in respect of each Class of Certificates, and the
Subordination Agent, the Trustees and the Liquidity Providers, by

<PAGE>

entering into this Agreement, hereby acknowledge and agree to such terms of
subordination and the other provisions of this Agreement.

            NOW, THEREFORE, in consideration of the mutual agreements herein
contained, and of other good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, the parties hereto agree as follows:

                                   ARTICLE I

                                  DEFINITIONS

            SECTION 1.1 Definitions. For all purposes of this Agreement, except
as otherwise expressly provided or unless the context otherwise requires:

            (1) the terms used herein that are defined in this Article have the
      meanings assigned to them in this Article, and include the plural as well
      as the singular;

            (2) all references in this Agreement to designated "Articles",
      "Sections" and other subdivisions are to the designated Articles, Sections
      and other subdivisions of this Agreement;

            (3) the words "herein", "hereof" and "hereunder" and other words of
      similar import refer to this Agreement as a whole and not to any
      particular Article, Section or other subdivision; and

            (4) the term "including" shall mean "including without limitation".

      "Acceleration" means, with respect to the amounts payable in respect of
the Equipment Notes issued under any Indenture, the declaration or deemed
declaration of such amounts to be immediately due and payable. "Accelerate" and
"Accelerated" have meanings correlative to the foregoing.

      "Adjusted Expected Distributions" means with respect to the Certificates
of any Class on any Current Distribution Date the sum of (x) the amount of
accrued and unpaid interest on such Certificates (excluding interest, if any,
payable with respect to the Deposits related to such Trust) plus (y) the greater
of:

            (A) the difference between (x) the Pool Balance of such Certificates
      as of the immediately preceding Distribution Date (or if the Current
      Distribution Date is the first Distribution Date, the original aggregate
      face amount of the Certificates of such Trust) and (y) the Pool Balance of
      such Certificates as of the Current Distribution Date calculated on the
      basis that (i) the principal of the NonPerforming Equipment Notes held in
      such Trust has been paid in full and such payments have been distributed
      to the holders of such Certificates, (ii) the


                                      -2-
<PAGE>

      principal of the Performing Equipment Notes has been paid when due (but
      without giving effect to any Acceleration of Performing Equipment Notes)
      and has been distributed to the holders of such Certificates and (iii) the
      principal of any Equipment Notes formerly held in such Trust which have
      been sold pursuant to the terms hereof have been paid in full and such
      payments have been distributed to the holders of such Certificates but
      without giving effect to any reduction in the Pool Balance as a result of
      any distribution attributable to Deposits occurring after the immediately
      preceding Distribution Date (or, if the Current Distribution Date is the
      first Distribution Date, occurring after the initial issuance of the
      Certificates of such Trust) and

            (B) the amount of the excess, if any, by which (i) the Pool Balance
      of such Class of Certificates as of the immediately preceding Distribution
      Date (or if the Current Distribution Date is the first Distribution Date,
      the original aggregate face amount of the Certificates of such Trust)
      (less the aggregate principal amount of the Equipment Notes relating to
      any Prefunded Aircraft (as defined in the Trust Agreement) less the amount
      of the Deposits for such Class of Certificates as of such preceding
      Distribution Date (or, if the Current Distribution Date is the first
      Distribution Date, the original aggregate amount of the Deposits for such
      Class of Certificates) other than any portion of such Deposits thereafter
      used to acquire Equipment Notes pursuant to the Note Purchase Agreement,
      over (ii) the Aggregate LTV Collateral Amount for such Class of
      Certificates for the Current Distribution Date;

provided that, until the date of the initial LTV Appraisals, clause (B) above
shall not be applicable.

      "Affiliate" means, with respect to any Person, any other Person directly
or indirectly controlling, controlled by or under common control with such
Person. For the purposes of this definition, "control" means the power, directly
or indirectly, to direct or cause the direction of the management and policies
of such Person whether through the ownership of voting securities or by contract
or otherwise; and the terms "controlling" and "controlled" have meanings
correlative to the foregoing.

      "Aggregate LTV Collateral Amount" means for any Class of Certificates for
any Distribution Date the sum of the applicable LTV Collateral Amounts for each
Leased Aircraft and Owned Aircraft minus the Pool Balance for each Class of
Certificates, if any, senior to such Class after giving effect to any
distribution of principal on such Distribution Date on such senior Class or
Classes.

      "Aircraft" means, with respect to any Indenture, the "Aircraft" referred
to therein.

      "Appraised Current Market Value" of any Lease Aircraft or Owned Aircraft
means the lower of the average and the median of the most recent three LTV
Appraisals of such Aircraft.


                                      -3-
<PAGE>

      "Appraisers" means Aircraft Information Systems, Inc., AvSolutions and
Morten Beyer and Agnew, Inc.

      "Available Amount" means, with respect to any Liquidity Facility on any
drawing date, an amount equal to (a) the Stated Amount of such Liquidity
Facility, less (b) the amount of each Interest Drawing honored by the Liquidity
Provider under such Liquidity Facility on or prior to such date which has not
been reimbursed or reinstated as of such date; provided that, following a
Downgrade Drawing, a Non-Extension Drawing or a Final Drawing under such
Liquidity Facility, the Available Amount of such Liquidity Facility shall be
zero.

      "Business Day" means any day other than a Saturday or Sunday or a day on
which commercial banks are required or authorized to close in Minneapolis,
Minnesota, New York, New York, or the city and state in which any Trustee, the
Subordination Agent or any Loan Trustee maintains its Corporate Trust Office or
receives and disburses funds.

      "Cash Collateral Account" means the Class A Cash Collateral Account, the
Class B Cash Collateral Account or the Class C Cash Collateral Account as
applicable.

      "Certificate" means a Class A Certificate, a Class B Certificate or a
Class C Certificate as applicable.

      "Certificateholder" means any holder of one or more Certificates.

      "Class" has the meaning assigned to such term in the preliminary
statements to this Agreement.

      "Class A Cash Collateral Account" means an Eligible Deposit Account in the
name of the Subordination Agent maintained at an Eligible Institution, which
shall be the Subordination Agent if it shall so qualify, into which all amounts
drawn under the Class A Liquidity Facility pursuant to Section 3.6(c), 3.6(d) or
3.6(i) shall be deposited.

      "Class A Certificateholder" means, at any time, any holder of one or more
Class A Certificates.

      "Class A Certificates" means the certificates issued by the Class A Trust,
substantially in the form of Exhibit A to the Class A Trust Agreement, and
authenticated by the Class A Trustee, representing fractional undivided
interests in the Class A Trust, and any certificates issued in exchange therefor
or replacement thereof pursuant to the terms of the Class A Trust Agreement.

      "Class A Liquidity Facility" means, initially, the Revolving Credit
Agreement dated as of June 25, 1999, by and between the Subordination Agent, as
agent and trustee of the Class A Trustee, and the Class A Liquidity Provider,
and, from and after the replacement of such Agreement pursuant hereto, the
Replacement Liquidity Facility


                                      -4-
<PAGE>

therefor, if any, in each case as amended, supplemented or otherwise modified
from time to time in accordance with its terms.

      "Class A Liquidity Provider" means Citibank, together with any Replacement
Liquidity Provider which has issued a Replacement Liquidity Facility to replace
the Class A Liquidity Facility pursuant to Section 3.6(e).

      "Class A Trust" means Northwest Airlines 1999-2A Pass Through Trust
created and administered pursuant to the Class A Trust Agreement.

      "Class A Trust Agreement" means the Pass Through Trust Agreement, as
supplemented by Trust Supplement No. 1999-2A thereto dated as of June 25, 1999,
by and among Northwest, the Guarantor and the Trustee, governing the creation
and administration of the Class A Trust and the issuance of the Class A
Certificates, as the same may be amended, supplemented or otherwise modified
from time to time in accordance with its terms.

      "Class A Trustee" means State Street of Connecticut, not in its individual
capacity except as expressly set forth in the Class A Trust Agreement, but
solely as trustee under the Class A Trust Agreement, together with any successor
trustee appointed pursuant thereto.

      "Class B Cash Collateral Account" means an Eligible Deposit Account in the
name of the Subordination Agent maintained at an Eligible Institution, which
shall be the Subordination Agent if it shall so qualify, into which all amounts
drawn under the Class B Liquidity Facility pursuant to Section 3.6(c), 3.6(d) or
3.6(i) shall be deposited.

      "Class B Certificateholder" means, at any time, any holder of one or more
Class B Certificates.

      "Class B Certificates" means the certificates issued by the Class B Trust,
substantially in the form of Exhibit A to the Class B Trust Agreement, and
authenticated by the Class B Trustee, representing fractional undivided
interests in the Class B Trust, and any certificates issued in exchange therefor
or replacement thereof pursuant to the terms of the Class B Trust Agreement.

      "Class B Liquidity Facility" means, initially, the Revolving Credit
Agreement dated as of June 25, 1999, by and between the Subordination Agent, as
agent and trustee of the Class B Trustee, and the Class B Liquidity Provider,
and, from and after the replacement of such Agreement pursuant hereto, the
Replacement Liquidity Facility therefor, if any, in each case as amended,
supplemented or otherwise modified from time to time in accordance with its
terms.


                                      -5-
<PAGE>

      "Class B Liquidity Provider" means Citibank, together with any Replacement
Liquidity Provider which has issued a Replacement Liquidity Facility to replace
the Class B Liquidity Facility pursuant to Section 3.6(e).

      "Class B Trust" means Northwest Airlines 1999-2B Pass Through Trust
created and administered pursuant to the Class B Trust Agreement.

      "Class B Trust Agreement" means the Pass Through Trust Agreement, as
supplemented by Trust Supplement No. 1999-2B thereto dated as of June 25, 1999,
by and among Northwest, the Guarantor and the Trustee, governing the creation
and administration of the Class B Trust and the issuance of the Class B
Certificates, as the same may be amended, supplemented or otherwise modified
from time to time in accordance with its terms.

      "Class B Trustee" means State Street of Connecticut, not in its individual
capacity except as expressly set forth in the Class B Trust Agreement, but
solely as trustee under the Class B Trust Agreement, together with any successor
trustee appointed pursuant thereto.

      "Class C Cash Collateral Account" means an Eligible Deposit Account in the
name of the Subordination Agent and maintained at an Eligible Institution, which
shall be the Subordination Agent if it shall so qualify, into which all amounts
drawn under the Class C Liquidity Facility pursuant to Section 3.6(c), 3.6(d) or
3.6(i) shall be deposited.

      "Class C Certificateholder" means, at any time, any holder of one or more
Class C Certificates.

      "Class C Certificates" means the certificates issued by the Class C Trust,
substantially in the form of Exhibit A to the Class C Trust Agreement, and
authenticated by the Class C Trustee, representing fractional undivided
interests in the Class C Trust, and any certificates issued in exchange therefor
or in replacement thereof pursuant to the terms of the Class C Trust Agreement.

      "Class C Liquidity Facility" means, initially, the Revolving Credit
Agreement dated as of June 25, 1999, by and between the Subordination Agent, as
agent and trustee of the Class C Trustee, and the Class C Liquidity Provider
and, from and after the replacement of such Agreement pursuant hereto, the
Replacement Liquidity Facility therefor, if any, in each case as amended,
supplemented or otherwise modified from time to time in accordance with its
terms.

      "Class C Liquidity Provider" means Citibank, together with any Replacement
Liquidity Provider which has issued a Replacement Liquidity Facility to replace
the Class C Liquidity Facility pursuant to Section 3.6(e).


                                      -6-
<PAGE>

      "Class C Trust" means Northwest Airlines 1999-1C Pass Through Trust
created and administered pursuant to the Class C Trust Agreement.

      "Class C Trust Agreement" means the Pass Through Trust Agreement, as
supplemented by Trust Supplement No. 1999-2C thereto dated as of June 25, 1999,
by and among Northwest, the Guarantor and the Trustee, governing the creation
and administration of the Class C Trust and the issuance of the Class C
Certificates, as the same may be amended, supplemented or otherwise modified
from time to time in accordance with its terms.

      "Class C Trustee" means State Street of Connecticut, not in its individual
capacity except as expressly set forth in the Class C Trust Agreement, but
solely as trustee under the Class C Trust Agreement, together with any successor
trustee appointed pursuant thereto.

      "Class D Certificates" means the pass through certificates, if any, issued
by Northwest Airlines, Inc. and designated Series 1999-2D, in connection with a
secured financing of an Owned Aircraft or a Leased Aircraft.

      "Class D Trustee" means the trustee of the trust relating to the Class D
Certificates.

      "Closing Date" means June 25, 1999.

      "Code" means the Internal Revenue Code of 1986, as amended from time to
time, and Treasury Regulations promulgated thereunder.

      "Collection Account" means the Eligible Deposit Account established by the
Subordination Agent pursuant to Section 2.2 which the Subordination Agent shall
make deposits in and withdrawals from in accordance with this Agreement.

      "Controlling Party" means the Person entitled to act as such pursuant to
the terms of Section 2.6.

      "Corporate Trust Office" means, with respect to any Trustee, the
Subordination Agent or any Loan Trustee, the office of such Person in the city
at which, at any particular time, its corporate trust business shall be
principally administered.

      "Current Distribution Date" means a Distribution Date specified as a
reference date for calculating the Adjusted Expected Distributions or Expected
Distributions with respect to the Certificates of any Trust as of such
Distribution Date.

      "Delivery Period Expiry Date" means the earlier of (a) May 31, 2000 and
(b) the date on which Equipment Notes with respect to all New Aircraft have been
purchased by the Trusts in accordance with the Note Purchase Agreement.


                                      -7-
<PAGE>

      "Deposit Agreement" shall mean, with respect to any Class, the Deposit
Agreement pertaining to such Class dated the date hereof between the Escrow
Agent, and the Depositary, as the same may be amended, modified or supplemented
from time to time in accordance with the terms thereof.

      "Depositary" means ABN AMRO Bank N.V., Chicago Branch, as depositary under
the Deposit Agreement relating to Class A, Class B and Class C Certificates.

      "Deposits" with respect to any Class, shall have the meaning set forth in
the Deposit Agreement pertaining to such Class.

      "Designated Representatives" means the Subordination Agent
Representatives, Trustee Representatives and the LP Representatives identified
under Section 2.5.

      "Distribution Date" means a Regular Distribution Date or a Special
Distribution Date.

      "Dollars" or "$" means United States dollars.

      "Downgrade Drawing" has the meaning assigned to such term in Section
3.6(c).

      "Downgraded Facility" has the meaning assigned to such term in Section
3.6(c).

      "Drawing" means an Interest Drawing, a Non-Extension Drawing, a Final
Drawing or a Downgrade Drawing, as the case may be.

      "Eligible Deposit Account" means either (a) a segregated account with an
Eligible Institution or (b) a segregated trust account with the corporate trust
department of a depository institution organized under the laws of the United
States of America or any one of the states thereof or the District of Columbia
(or any U.S. branch of a foreign bank), having corporate trust powers and acting
as trustee for funds deposited in such account, so long as any of the securities
of such depository institution has a long-term unsecured debt rating from each
Rating Agency of at least A-3 or its equivalent. An Eligible Deposit Account may
be maintained with a Liquidity Provider so long as such Liquidity Provider is an
Eligible Institution (as defined below); provided that such Liquidity Provider
shall have waived all rights of set-off and counterclaim with respect to such
account.

      "Eligible Institution" means, subject to the last sentence of subsection
2.2(c), (a) the corporate trust department of the Subordination Agent or any
Trustee, as applicable, or (b) a depository institution organized under the laws
of the United States of America or any one of the states thereof or the District
of Columbia (or any U.S. branch of a foreign bank), which has a long-term
unsecured debt rating from each Rating Agency of at least A-3 or its equivalent.


                                      -8-
<PAGE>

      "Eligible Investments" means (a) investments in obligations of, or
guaranteed by, the United States Government having maturities no later than 90
days following the date of such investment, (b) investments in open market
commercial paper of any corporation incorporated under the laws of the United
States of America or any state thereof with a short-term unsecured debt rating
issued by Moody's and Standard & Poor's of at least A-1 and P-1, respectively,
and, if rated by Fitch, F-1, having maturities no later than 90 days following
the date of such investment or (c) investments in negotiable certificates of
deposit, time deposits, banker's acceptances, commercial paper or other direct
obligations of, or obligations guaranteed by, commercial banks organized under
the laws of the United States or of any political subdivision thereof (or any
U.S. branch of a foreign bank) with issuer ratings of at least B/C by Thomson
Bankwatch, having maturities no later than 90 days following the date of such
investment; provided, however, that (x) all Eligible Investments that are bank
obligations shall be denominated in U.S. dollars; and (y) the aggregate amount
of Eligible Investments at any one time that are bank obligations issued by any
one bank shall not be in excess of 5% of such bank's capital surplus; provided
further that (1) any investment of the types described in clauses (a), (b) and
(c) above may be made through a repurchase agreement in commercially reasonable
form with a bank or other financial institution qualifying as an Eligible
Institution so long as such investment is held by a third party custodian also
qualifying as an Eligible Institution, and (2) all such investments set forth in
(a), (b) and (c) above mature no later than the Business Day immediately
preceding the next Regular Distribution Date; provided further, however, that in
the case of any Eligible Investment issued by a domestic branch of a foreign
bank, the income from such investment shall be from sources within the United
States for purposes of the Code. Notwithstanding the foregoing, no investment of
the types described in clause (b) or (c) above which is issued or guaranteed by
a Liquidity Provider or Northwest or any of their respective Affiliates shall be
an Eligible Investment.

      "Equipment Notes" means, at any time, the Series A Equipment Notes, the
Series B Equipment Notes and the Series C Equipment Notes, collectively, and in
each case, any Equipment Notes issued in exchange therefor or replacement
thereof pursuant to the terms of the Indentures.

      "Escrow Agent" means First Security Bank, National Association, as escrow
agent under each Escrow and Paying Agent Agreement, together with its successors
in such capacity.

      "Escrow and Paying Agent Agreement" shall mean, with respect to any Class,
the Escrow and Paying Agent Agreement pertaining to such Class, dated the date
hereof, among the Escrow Agent, the Underwriters, the Trustee for such Class and
the Paying Agent, as the same may be amended, modified or supplemented from time
to time in accordance with the terms thereof.

      "Expected Distributions" means, with respect to the Certificates of any
Trust on any Current Distribution Date, the sum of (x) accrued and unpaid
interest on such


                                      -9-
<PAGE>

Certificates (excluding interest, if any, payable with respect to the Deposits
related to such Trust) and (y) the difference between (A) the Pool Balance of
such Certificates as of the immediately preceding Distribution Date (or if the
current Distribution Date is the first Distribution Date, the original aggregate
face amount of the Certificates of such Trust) and (B) the Pool Balance of such
Certificates as of the Current Distribution Date, calculated on the basis that
(1) the principal of the Equipment Notes held in such Trust has been paid when
due (whether at stated maturity or upon redemption, prepayment, purchase or
acceleration or otherwise) and such payments have been distributed to the
holders of such Certificates and (2) the principal of any Equipment Notes
formerly held in such Trust that have been sold pursuant to this Agreement has
been paid in full and such payments distributed to the Certificateholders, but
without giving effect to any reduction in the Pool Balance as a result of any
distribution attributable to Deposits occurring after the immediately preceding
Distribution Date (or, if the Current Distribution Date is the first
Distribution Date, occurring after the initial issuance of the Certificates of
such Trust). For purposes of calculating Expected Distributions, any premium
paid on the Equipment Notes held in any Trust which has not been distributed to
the Certificateholders of such Trust (other than such premium or a portion
thereof applied to the payment of interest on the Certificates of such Trust or
the reduction of the Pool Balance of such Trust) shall be added to the amount of
such Expected Distributions.

      "Expiry Date" with respect to any Liquidity Facility, shall have the
meaning set forth in such Liquidity Facility.

      "Final Distributions" means, with respect to the Certificates of any Trust
on any Distribution Date, the sum of (a) the aggregate amount of all accrued and
unpaid interest on such Certificates (excluding interest, if any, payable with
respect to the Deposits relating to such Trust) and (b) the Pool Balance of such
Certificates as of the immediately preceding Distribution Date (less the amount
of the Deposits for such Class of Certificates as of such preceding Distribution
Date other than any portion of such Deposits thereafter used to acquire
Equipment Notes pursuant to the Note Purchase Agreement). For purposes of
calculating Final Distributions with respect to the Certificates of any Trust,
any premium paid on the Equipment Notes held in such Trust which has not been
distributed to the Certificateholders of such Trust (other than such premium or
a portion thereof applied to the payment of interest on the Certificates of such
Trust or the reduction of the Pool Balance of such Trust) shall be added to the
amount of such Final Distributions.

      "Final Drawing" means, in respect of a Liquidity Facility, a borrowing or
drawing, other than an Interest Drawing, a Downgrade Drawing or a Non-Extension
Drawing, of all available and undrawn amounts under such Liquidity Facility in
accordance with the provisions thereof.

      "Final Legal Distribution Date" means, for the Class A Certificates,
September 1, 2020, for the Class B Certificates, September 1, 2016, and, for the
Class C Certificates, September 1, 2011.


                                      -10-
<PAGE>

      "Financing Agreement" means each of the Participation Agreements and the
Note Purchase Agreement.

      "Fitch" means Fitch Investors Service, L.P.

      "Guarantor" means Northwest Airlines Corporation, a Delaware corporation
and its successors and assigns.

      "Indenture" means each of the Trust Indentures entered into by the Loan
Trustee, and the Owner Trustee or Northwest, pursuant to the Note Purchase
Agreement, in each case as the same may be amended, supplemented or otherwise
modified from time to time in accordance with its terms.

      "Indenture Default" means, with respect to any Indenture, any Event of
Default (as such term is defined in such Indenture) thereunder.

      "Interest Drawing" has the meaning assigned to such term in Section
3.6(a).

      "Interest Payment Date" means, with respect to any Liquidity Facility,
each date on which interest is due and payable under such Liquidity Facility on
a Downgrade Drawing, Non-Extension Drawing or Final Drawing thereunder, other
than any such date on which interest is due and payable under such Liquidity
Facility only on an Applied Provider Advance (as such term is defined in such
Liquidity Facility).

      "Investment Earnings" means investment earnings on funds on deposit in the
Trust Accounts net of losses and investment expenses of the Subordination Agent
in making such investments.

      "Lease" means, with respect to any Indenture relating to a Leased
Aircraft, the "Lease" referred to therein.

      "Leased Aircraft" has the meaning assigned to such term in the preliminary
statements of this Agreement.

      "Lien" means any mortgage, pledge, lien, charge, claim, disposition of
title, encumbrance, lease, sublease, sub-sublease or security interest of any
kind, including, without limitation, any thereof arising under any conditional
sales or other title retention agreement.

      "Liquidity Event of Default" with respect to any Liquidity Facility, has
the meaning assigned to such term in such Liquidity Facility.

      "Liquidity Expenses" means all Liquidity Obligations other than (i) the
principal amount of any Drawings under the Liquidity Facilities and (ii) any
interest accrued on any Liquidity Obligations.


                                      -11-
<PAGE>

      "Liquidity Facility" means, at any time, the Class A Liquidity Facility,
the Class B Liquidity Facility or the Class C Liquidity Facility, as applicable.

      "Liquidity Obligations" means all principal, interest, fees and other
amounts owing to the Liquidity Providers under the Liquidity Facilities and
Section 7 of the Participation Agreements.

      "Liquidity Provider" means, at any time, the Class A Liquidity Provider,
the Class B Liquidity Provider or the Class C Liquidity Provider, as applicable.

      "Loan Trustee" means, with respect to any Indenture, the indenture trustee
thereunder.

      "LP Incumbency Certificate" has the meaning assigned to such term in
Section 2.5(b).

      "LP Representatives" has the meaning assigned to such term in Section
2.5(b).

      "LTV Appraisal" means a current fair market appraisal (which may be a
"desktop" appraisal) performed by any Appraiser or any other nationally
recognized appraiser on the basis of an arm's-length transaction between an
informed and willing purchaser under no compulsion to buy and an informed and
willing seller under no compulsion to sell and both having knowledge of all
relevant facts.

      "LTV Collateral Amount" of any Leased Aircraft or Owned Aircraft for any
Class of Certificates on any Distribution Date means the lesser of (i) the LTV
Ratio for such Class of Certificates multiplied by the Appraised Current Market
Value of such Aircraft (or with respect to any such Aircraft which has suffered
an Event of Loss under and as defined in the relevant Lease (in the case of a
Leased Aircraft) or Indenture (in the case of an Owned Aircraft), the amount of
the insurance proceeds paid to the related Loan Trustee in respect thereof to
the extent then held by such Loan Trustee (and/or on deposit in the Special
Payments Account) or payable to such Loan Trustee in respect thereof) and (ii)
the outstanding principal amount of the Equipment Notes secured by such Aircraft
after giving effect to any principal payments of such Equipment Notes on or
before such Distribution Date.

      "LTV Ratio" means, for the Class A Certificates, 41.9%, for the Class B
Certificates, 55.9%, and, for the Class C Certificates, 69.0%.

      "Minimum Sale Price" means, with respect to any Aircraft or the Equipment
Notes issued in respect of such Aircraft, at any time, the lesser of (a) 75% of
the Appraised Current Market Value of such Aircraft and (b) the aggregate
outstanding principal amount of such Equipment Notes, plus accrued and unpaid
interest thereon.

      "Moody's" means Moody's Investors Service, Inc.


                                      -12-
<PAGE>

      "New Aircraft" shall have the meaning set forth in the Note Purchase
Agreement.

      "Non-Controlling Party" means, at any time, any Trustee or Liquidity
Provider which is not the Controlling Party at such time.

      "Non-Extended Facility" has the meaning provided in Section 3.6(d).

      "Non-Extension Drawing" has the meaning provided in Section 3.6(d).

      "Non-Performing Equipment Note" means an Equipment Note issued pursuant to
an Indenture that is not a Performing Equipment Note.

      "Northwest" means Northwest Airlines, Inc., a Minnesota corporation, and
its successors and assigns.

      "Northwest Bankruptcy Event" means the occurrence and continuation of any
of the following:

            (a) the commencement of an involuntary case or other proceeding in
      respect of Northwest in an involuntary case under the federal bankruptcy
      laws, as now or hereafter constituted, or any other applicable federal or
      state bankruptcy, insolvency or other similar law in the United States or
      seeking the appointment of a receiver, liquidator, assignee, custodian,
      trustee, sequestrator (or similar official) of Northwest or for all or
      substantially all of its property, or seeking the winding-up or
      liquidation of its affairs and the continuation of any such case or other
      proceeding undismissed and unstayed for a period of ninety (90)
      consecutive days or an order, judgment or decree shall be entered in any
      proceeding by any court of competent jurisdiction appointing, without the
      consent of Northwest, a receiver, trustee or liquidator of Northwest, or
      of any substantial part of its property, or sequestering any substantial
      part of the property of Northwest and any such order, judgment or decree
      or appointment or sequestration shall be final or shall remain in force
      undismissed, unstayed or unvacated for a period of ninety (90) days after
      the date of entry thereof; or

            (b) the commencement by Northwest of a voluntary case under the
      federal bankruptcy laws, as now constituted or hereafter amended, or any
      other applicable federal or state bankruptcy, insolvency or other similar
      law in the United States, or the consent by Northwest to the appointment
      of or taking possession by a receiver, liquidator, assignee, trustee,
      custodian, sequestrator (or other similar official) of Northwest or for
      all or substantially all of its property, or the making by Northwest of
      any assignment for the benefit of creditors or the taking by Northwest of
      any corporate action to authorize any of the foregoing.

      "Northwest Provisions" has the meaning provided in Section 9.1(a).


                                      -13-
<PAGE>

      "Note Purchase Agreement" means the Note Purchase Agreement dated as of
June 25, 1999 among Northwest, each Trustee, the Escrow Agent, the Subordination
Agent and the Paying Agent.

      "NWA Corp." means Northwest Airlines Corporation (formerly known as
Newbridge Parent Corporation), a Delaware corporation, and its successors and
assigns.

      "Officer's Certificate" of any Person means a certification signed by a
Responsible Officer of such Person.

      "Operative Agreements" means this Agreement, the Liquidity Facilities, the
Indentures, the Trust Agreements, the Underwriting Agreement, the Financing
Agreements, the Leases, the Equipment Notes and the Certificates, together with
all exhibits and schedules included with any of the foregoing and each of the
other documents and instruments referred to in the definitions of "Operative
Documents" contained in the Leases or any Owned Aircraft Indenture.

      "Outstanding" means, when used with respect to each Class of Certificates,
as of the date of determination, all Certificates of such Class theretofore
authenticated and delivered under the related Trust Agreement, except:

            (i) Certificates of such Class theretofore cancelled by the
      Registrar (as defined in such Trust Agreement) or delivered to the Trustee
      thereunder or such Registrar for cancellation;

            (ii) Certificates of such Class for which money in the full amount
      required to make the final distribution with respect to such Certificates
      pursuant to Section 11.01 of such Trust Agreement has been theretofore
      deposited with the related Trustee in trust for the holders of such
      Certificates as provided in Section 4.01 of such Trust Agreement pending
      distribution of such money to such Certificateholders pursuant to such
      final distribution payment; and

            (iii) Certificates of such Class in exchange for or in lieu of which
      other Certificates have been authenticated and delivered pursuant to such
      Trust Agreement;

provided, however, that in determining whether the holders of the requisite
Outstanding amount of such Certificates have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, any Certificates
owned by Northwest or any of its Affiliates shall be disregarded and deemed not
to be Outstanding, except that, in determining whether such Trustee shall be
protected in relying upon any such request, demand, authorization, direction,
notice, consent or waiver, only Certificates that such Trustee knows to be so
owned shall be so disregarded. Certificates so owned that have been pledged in
good faith may be regarded as Outstanding if the pledgee establishes to


                                      -14-
<PAGE>

the satisfaction of the applicable Trustee the pledgee's right so to act with
respect to such Certificates and that the pledgee is not Northwest or any of its
Affiliates.

      "Overdue Scheduled Payment" means any Scheduled Payment which is not in
fact received by the Subordination Agent within five days of the Scheduled
Payment Date relating thereto.

      "Owned Aircraft" has the meaning assigned to such term in the preliminary
statements of this Agreement.

      "Owner Trustee" means, with respect to any Indenture pertaining to a
Leased Aircraft, the Owner Trustee (as defined therein) not in its individual
capacity but solely as trustee under the related owner trust agreement, together
with any successor trustee appointed pursuant to such owner trust agreement.

      "Participation Agreements" means, with respect to each Indenture, each of
the Participation Agreements listed on Schedule 1 hereto, as the same may be
amended, supplemented or otherwise modified from time to time in accordance with
its terms.

      "Pass Through Trust Agreement" means the Pass Through Trust Agreement,
dated as of June 3, 1999 by and among the Guarantor, Northwest and the State
Street Bank and Trust Company of Connecticut, National Association, not in its
individual capacity except as expressly provided therein, but solely as trustee
(in such capacity, together with its successors in such capacity, the "Pass
Through Trustee").

      "Paying Agent" means State Street Bank and Trust Company, as paying agent
under each Escrow and Paying Agent Agreement, together with its successors in
such capacity.

      "Performing Equipment Note" means an Equipment Note issued pursuant to an
Indenture with respect to which no payment default has occurred and is
continuing (without giving effect to any Acceleration thereof); provided that in
the event of a bankruptcy proceeding involving Northwest under Title 11 of the
United States Code (the "Bankruptcy Code"), (i) any payment default existing
during the 60-day period under Section 1110(a)(1)(A) of the Bankruptcy Code (or
such longer period as may apply under Section 1110(b) of the Bankruptcy Code)
(the "Section 1110 Period") shall not be taken into consideration, unless during
such period the trustee in such proceeding or Northwest refuses to assume or
agree to perform its obligations under the Lease related to such Equipment Notes
(in the case of a Leased Aircraft) or under the Indenture related to such
Equipment Note (in the case of an Owned Aircraft) and (ii) any payment default
occurring after the date of the order of relief in such proceeding shall not be
taken into consideration if such payment default is cured under Section
1110(a)(1)(B) of the Bankruptcy Code before the later of 30 days after the date
of such default or the expiration of the Section 1110 Period.


                                      -15-
<PAGE>

      "Performing Note Deficiency" means any time that less than 65% of the then
aggregate outstanding principal amount of all Equipment Notes are Performing
Equipment Notes.

      "Person" means any individual, corporation, limited liability company,
partnership, joint venture, association, joint-stock company, trust, trustee,
unincorporated organization or government or any agency or political subdivision
thereof.

      "Pool Balance" means, with respect to each Trust or the Certificates
issued by any Trust, as of any date, (i) the original aggregate face amount of
the Certificates of such Trust less (ii) the aggregate amount of all payments
made in respect of the Certificates of such Trust or in respect of Deposits
relating to such Trust other than payments made in respect of interest or
premium thereon or reimbursement of any costs and expenses in connection
therewith. The Pool Balance for each Trust or the Certificates issued by any
Trust as of any Distribution Date shall be computed after giving effect to any
special distribution with respect to unused Deposits, any payment of principal,
if any, on the Equipment Notes or other Trust Property held in such Trust and
the distribution thereof to be made on such date.

      "Proceeding" means any suit in equity, action at law or other judicial or
administrative proceeding.

      "PTC Event of Default" means, with respect to each Trust Agreement, the
failure to pay within 10 Business Days of the due date thereof: (i) the
outstanding Pool Balance of the applicable Class of Certificates on the Final
Legal Distribution Date for such Class or (ii) interest due on such Certificates
on any Distribution Date (unless, in the case of the Class A, Class B or Class C
Certificates, the Subordination Agent shall have made an Interest Drawing with
respect thereto in an amount sufficient to pay such interest and shall have
distributed such amount to the holders of the Certificates entitled thereto).

      "Rating Agencies" means, collectively, at any time, each nationally
recognized rating agency which shall have been requested to rate the
Certificates and which shall then be rating the Certificates. Initially, the
Rating Agencies shall consist of Moody's and Standard & Poor's.

      "Ratings Confirmation" means, with respect to any action proposed to be
taken, a written confirmation from each of the Rating Agencies that such action
would not result in (i) a reduction of the rating for any Class of Certificates
below the then current rating for such Class of Certificates or (ii) a
withdrawal or suspension of the rating of any Class of Certificates.

      "Regular Distribution Dates" means each March 1 and September 1,
commencing on March 1, 2000; provided, however, that, if any such day shall not
be a Business Day, the related distribution shall be made on the next succeeding
Business Day without additional interest.


                                      -16-
<PAGE>

      "Replacement Liquidity Facility" means, for any Trust, an irrevocable
revolving credit agreement in substantially the form of the initial Liquidity
Facility for such Trust, including reinstatement provisions or in such other
form (which may include a letter of credit) as shall permit the Rating Agencies
to confirm in writing their respective ratings then in effect for the
Certificates (before downgrading of such ratings, if any, as a result of the
downgrading of the Liquidity Provider), in a face amount equal to the Required
Amount for such Liquidity Facility and issued by a Replacement Liquidity
Provider, provided that, if a form of Liquidity Facility that is not
substantially in the form of the replaced Liquidity Facility is to be used,
Northwest shall have received a satisfactory opinion of tax counsel satisfactory
to Northwest with respect to such form of Replacement Liquidity Facility (and a
copy of such opinion shall be furnished to the Subordination Agent).

      "Replacement Liquidity Provider" means a Person having unsecured debt
ratings which are equal to or higher than the Threshold Rating.

      "Required Amount" means, with respect to each Liquidity Facility and each
Cash Collateral Account related thereto, for any day, the sum of the aggregate
amount of interest, calculated at the rate per annum equal to the Stated
Interest Rate for the related Class of Certificates, that would be payable on
such Class of Certificates on each of the three successive Regular Distribution
Dates immediately following such day or, if such day is a Regular Distribution
Date, on such day and the succeeding two Regular Distribution Dates, in each
case calculated on the basis of the Pool Balance of such Class of Certificates
on such date and without regard to expected future payments of principal on such
Class of Certificates.

      "Responsible Officer" means (i) with respect to the Subordination Agent
and each of the Trustees, any officer in the corporate trust administration
department of the Subordination Agent or such Trustee or any other officer
customarily performing functions similar to those performed by the Persons who
at the time shall be such officers, respectively, or to whom any corporate trust
matter is referred because of his knowledge of and familiarity with a particular
subject and (ii) with respect to each Liquidity Provider, any authorized officer
or agent of such Liquidity Provider.

      "Scheduled Payment" means, with respect to any Equipment Note, (i) any
payment of principal and interest on such Equipment Note (other than an Overdue
Scheduled Payment) due from the obligor thereon or (ii) any payment of interest
on the corresponding Class of Certificates with funds drawn under any Liquidity
Facility, which payment represents the installment of principal at the stated
maturity of such installment of principal on such Equipment Note, the payment of
regularly scheduled interest accrued on the unpaid principal amount of such
Equipment Note, or both; provided that any payment of principal of, premium, if
any, or interest resulting from the redemption or purchase of any Equipment Note
shall not constitute a Scheduled Payment.


                                      -17-
<PAGE>

      "Scheduled Payment Date" means, with respect to any Scheduled Payment, the
date on which such Scheduled Payment is scheduled to be made.

      "Series A Equipment Notes" means the 7.575% Series A Equipment Notes
issued pursuant to each Indenture by the related Owner Trustee or Northwest, as
the case may be and authenticated by the Loan Trustee thereunder, and any such
Equipment Notes issued in exchange therefor or replacement thereof pursuant to
the terms of such Indenture.

      "Series B Equipment Notes" means the 7.950% Series B Equipment Notes
issued pursuant to each Indenture by the related Owner Trustee or Northwest, as
the case may be, and authenticated by the Loan Trustee thereunder, and any such
Equipment Notes issued in exchange therefor or replacement thereof pursuant to
the terms of such Indenture.

      "Series C Equipment Notes" means the 8.304% Series C Equipment Notes
issued pursuant to each Indenture by the related Owner Trustee or Northwest, as
the case may be, and authenticated by the Loan Trustee thereunder, and any such
Equipment Notes issued in exchange therefor or replacement thereof pursuant to
the terms of such Indenture.

      "Special Distribution Date" means, with respect to any Special Payment,
the date chosen by the Subordination Agent pursuant to Section 2.4(a) for the
distribution of such Special Payment in accordance with this Agreement;
provided, however, that, if any such day shall not be a Business Day, the
related distribution shall be made on the next succeeding Business Day without
additional interest.

      "Special Payment" means any payment (other than a Scheduled Payment) in
respect of, or any proceeds of, any Equipment Note or Trust Indenture Estate (as
defined in each Indenture), including Overdue Scheduled Payments, payments in
respect of the redemption or repurchase of any Equipment Note and payments in
respect of the sale of any Equipment Note to the related Owner Trustee, Owner
Participant or any other Person.

      "Special Payments Account" means the Eligible Deposit Account created
pursuant to Section 2.2 as a sub-account to the Collection Account.

      "Specified Investments" has the meaning assigned to such term in the Pass
Through Trust Agreement.

      "Standard & Poor's" means Standard & Poor's Ratings Services, a division
of McGraw-Hill Inc.

      "State Street of Connecticut" has the meaning assigned to it in the
preamble to this Agreement.


                                      -18-
<PAGE>

      "Stated Amount" with respect to any Liquidity Facility, means the
Commitment (as defined in such Liquidity Facility) of the applicable Liquidity
Provider thereunder.

      "Stated Interest Rate" means (i) with respect to the Class A Certificates,
7.575% per annum; (ii) with respect to the Class B Certificates, 7.950% per
annum, and (iii) with respect to the Class C Certificates, 8.304% per annum.

      "Subordination Agent" has the meaning assigned to it in the preamble to
this Agreement.

      "Tax" and "Taxes" mean any and all taxes, fees, levies, duties, tariffs,
imposts, and other charges of any kind (together with any and all interest,
penalties, loss, damage, liability, expense, additions to tax and additional
amounts or costs incurred or imposed with respect thereto) imposed or otherwise
assessed by the United States or by any state, local or foreign government (or
any subdivision or agency thereof) or other taxing authority, including, without
limitation: taxes or other charges on or with respect to income, franchises,
windfall or other profits, gross receipts, property, sales, use, capital stock,
payroll, employment, social security, workers' compensation, unemployment
compensation, or net worth and similar charges; taxes or other charges in the
nature of excise, withholding, ad valorem, stamp, transfer, value added, taxes
on goods and services, gains taxes, license, registration and documentation
fees, customs duties, tariffs, and similar charges.

      "Threshold Rating" means the short-term unsecured debt rating of P-1 by
Moody's and A-1+ by Standard & Poor's, in the case of the Class A Liquidity
Provider, and the short-term unsecured debt rating of P-1 by Moody's and A-1 by
Standard & Poor's, in the case of the Class B Liquidity Provider and the Class C
Liquidity Provider.

      "Treasury Regulations" means regulations, including proposed or temporary
regulations, promulgated under the Code. References herein to specific
provisions of proposed or temporary regulations shall include analogous
provisions of final Treasury Regulations or other successor Treasury
Regulations.

      "Triggering Event" means (x) the occurrence of an Indenture Default under
all of the Indentures resulting in a PTC Event of Default with respect to the
most senior Class of Certificates then Outstanding, (y) the Acceleration of all
of the outstanding Equipment Notes (provided that, with respect to the period
prior to the Delivery Period Expiry Date, such Equipment Notes have an aggregate
principal balance in excess of $300,000,000) or (z) the occurrence of a
Northwest Bankruptcy Event.

      "Trust" means any of the Class A Trust, the Class B Trust or the Class C
Trust.

      "Trust Accounts" has the meaning assigned to such term in Section 2.2(a).


                                      -19-
<PAGE>

      "Trust Agreement" means any of the Class A Trust Agreement, Class B Trust
Agreement or Class C Trust Agreement.

      "Trustee" means any of the Class A Trustee, the Class B Trustee or the
Class C Trustee.

      "Trustee Incumbency Certificate" has the meaning assigned to such term in
Section 2.5(a).

      "Trustee Representatives" has the meaning assigned to such term in Section
2.5(a).

      "Underwriters" means Salomon Smith Barney Inc., Credit Suisse First Boston
Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA) Inc. and
Deutsche Bank Securities Inc.

      "Underwriting Agreement" means the Underwriting Agreement dated as of June
18, 1999, by and among the Underwriters, Northwest and the Guarantor, relating
to the purchase of the Certificates by the Underwriters, as the same may be
amended, supplemented or otherwise modified from time to time in accordance with
its terms.

      "Written Notice" means, from (i) any Trustee or Liquidity Provider, a
written instrument executed by the Designated Representative of such Person, and
(ii) the Subordination Agent, a written instrument executed by a Person
designated in the Officer's Certificate of the Subordination Agent delivered on
the Closing Date. An invoice delivered by a Liquidity Provider pursuant to
Section 3.1 in accordance with its normal invoicing procedures shall constitute
Written Notice under such Section.

                                  ARTICLE II

                       TRUST ACCOUNTS; CONTROLLING PARTY

            SECTION 2.1 Agreement to Terms of Subordination; Payments from
Monies Received Only. (a) Each Trustee hereby acknowledges and agrees to the
terms of subordination set forth in this Agreement in respect of each Class of
Certificates and agrees to enforce such provisions and cause all payments in
respect of the Equipment Notes and the Liquidity Facilities to be applied in
accordance with the terms of this Agreement. In addition, each Trustee hereby
agrees to cause the Equipment Notes purchased by the related Trust to be
registered in the name of the Subordination Agent, as agent and trustee for such
Trustee, to be held in trust by the Subordination Agent solely for the purpose
of facilitating the enforcement of the subordination and other provisions of
this Agreement.

            (b) Except as otherwise expressly provided in the next succeeding
sentence of this Section 2.1, all payments to be made by the Subordination Agent
hereunder shall be made


                                      -20-
<PAGE>

only from amounts received by it that constitute Scheduled Payments, Special
Payments, payments under Section 6(c) of the Participation Agreements or
payments under Section 7 of the Note Purchase Agreement, and only to the extent
that the Subordination Agent shall have received sufficient income or proceeds
therefrom to enable it to make such payments in accordance with the terms
hereof. Each of the Trustees and the Subordination Agent hereby agrees and, as
provided in each Trust Agreement, each Certificateholder, by its acceptance of a
Certificate, and each Liquidity Provider, by entering into the Liquidity
Facility to which it is a party, has agreed to look solely to such amounts to
the extent available for distribution to it as provided in this Agreement and to
the relevant Deposits and that none of the Trustees, Owner Trustees, Loan
Trustees, Owner Participants nor the Subordination Agent is personally liable to
any of them for any amounts payable or any liability under this Agreement, any
Trust Agreement, any Liquidity Facility or such Certificate, except (in the case
of the Subordination Agent) as expressly provided herein or (in the case of the
Trustees) as expressly provided in each Trust Agreement or (in the case of the
Owner Trustees and the Loan Trustees) as expressly provided in any Operative
Agreement.

            SECTION 2.2 Trust Accounts. (a) Upon the execution of this
Agreement, the Subordination Agent shall establish and maintain in its name (i)
the Collection Account as an Eligible Deposit Account, bearing a designation
clearly indicating that the funds deposited therein are held in trust for the
benefit of the Trustees, the Certificateholders and the Liquidity Providers and
(ii) as a sub-account in the Collection Account, the Special Payments Account as
an Eligible Deposit Account, bearing a designation clearly indicating that the
funds deposited therein are held in trust for the benefit of the Trustees, the
Certificateholders and the Liquidity Providers. The Subordination Agent shall
establish and maintain the Cash Collateral Accounts pursuant to and under the
circumstances set forth in Section 3.6(f) hereof. Upon such establishment and
maintenance under Section 3.6(f) hereof, the Cash Collateral Accounts shall,
together with the Collection Account, constitute the "Trust Accounts" hereunder.

            (b) Funds on deposit in the Trust Accounts shall be invested and
reinvested by the Subordination Agent in Eligible Investments selected by the
Subordination Agent if such investments are reasonably available and have
maturities no later than the earlier of (i) 90 days following the date of such
investment and (ii) the Business Day immediately preceding the Regular
Distribution Date or the date of the related distribution pursuant to Section
2.4 hereof, as the case may be, next following the date of such investment;
provided, however, that following the making of a Downgrade Drawing or a
Non-Extension Drawing, the Subordination Agent shall invest and reinvest such
amounts at the direction of the Liquidity Provider funding such Drawing and the
Subordination Agent shall use reasonable efforts to cause such amounts to be
invested in Specified Investments which yield at least an amount equal to the
interest (excluding the Applicable Margin (as defined in the applicable
Liquidity Facility)) that is payable to such Liquidity Provider in respect of
such amounts pursuant to Section 3.7 of the relevant Liquidity Facility (it
being understood that it may not be feasible to obtain such a yield). Unless
otherwise expressly provided in this Agreement (including, without limitation,
with respect to Investment Earnings on deposit in the Cash Collateral Accounts,
Section 3.6(f) hereof), any Investment Earnings shall be deposited in the
Collection Account when received by the Subordination Agent and shall be applied
by the Subordination Agent in the same manner as the principal amount of


                                      -21-
<PAGE>

such investment is to be applied and any losses shall be charged against the
principal amount invested, in each case net of the Subordination Agent's
reasonable fees and expenses in making such investments. The Subordination Agent
shall not be liable for any loss resulting from any investment, reinvestment or
liquidation required to be made under this Agreement other than by reason of its
willful misconduct or gross negligence or, with respect to the handling or
transfer of funds, ordinary negligence. Eligible Investments and any other
investment required to be made hereunder shall be held to their maturities
except that any such investment may be sold (without regard to its maturity) by
the Subordination Agent without instructions whenever such sale is necessary to
make a distribution required under this Agreement. Uninvested funds held
hereunder shall not earn or accrue interest.

            (c) The Subordination Agent shall possess all right, title and
interest in all funds on deposit from time to time in the Trust Accounts and in
all proceeds thereof (including all income thereon, except as otherwise provided
herein with respect to Investment Earnings). The Trust Accounts shall be held in
trust by the Subordination Agent under the sole dominion and control of the
Subordination Agent for the benefit of the Trustees, the Certificateholders and
the Liquidity Providers, as the case may be. If, at any time, any of the Trust
Accounts ceases to be an Eligible Deposit Account, the Subordination Agent shall
within 10 Business Days (or such longer period, not to exceed 30 calendar days,
to which each Rating Agency may consent) establish a new Collection Account,
Special Payments Account or Cash Collateral Account, as the case may be, as an
Eligible Deposit Account and shall transfer any cash and/or any investments to
such new Collection Account, Special Payments Account or Cash Collateral
Account, as the case may be. So long as the Subordination Agent is an Eligible
Institution, the Trust Accounts shall be maintained with it as Eligible Deposit
Accounts.

            SECTION 2.3 Deposits to the Collection Account and Special Payments
Account. (a) The Subordination Agent shall, upon receipt thereof, deposit in the
Collection Account all Scheduled Payments received by it.

            (b) The Subordination Agent shall, on each date when one or more
Special Payments are made to the Subordination Agent as holder of the Equipment
Notes, deposit in the Special Payments Account the aggregate amount of such
Special Payments.

            SECTION 2.4 Distributions of Special Payments. (a) Notice of Special
Payment. Except as provided in Section 2.4(e), upon receipt by the Subordination
Agent, as registered holder of the Equipment Notes, of any notice of a Special
Payment (or, in the absence of any such notice, upon receipt by the
Subordination Agent of a Special Payment), the Subordination Agent shall
promptly give notice thereof to each Trustee and the Liquidity Providers. The
Subordination Agent shall promptly calculate the amount of the redemption or
purchase of Equipment Notes or the amount of any Overdue Scheduled Payment, as
the case may be, comprising such Special Payment under the applicable Indenture
or Indentures and shall promptly send to each Trustee and the Liquidity Provider
a Written Notice of such amount and the amount allocable to each Trust. Such
Written Notice shall also set the distribution date for such Special Payment (a
"Special Distribution Date"), which shall be a Business Day which follows the
later to occur of (x) the 15th day after the date of such Written Notice or (y)
the date


                                      -22-
<PAGE>

the Subordination Agent has received or expects to receive such Special Payment.
Amounts on deposit in the Special Payments Account shall be distributed in
accordance with Sections 2.4(b) and 2.4(c) hereof, as applicable.

            (b) (i) Redemptions and Purchases of Equipment Notes. So long as no
Triggering Event shall have occurred (whether or not continuing), the
Subordination Agent shall make distributions pursuant to this Section 2.4(b) of
amounts on deposit in the Special Payments Account on account of the redemption
or purchase (including, without limitation, a purchase resulting from the sale
of the Equipment Notes permitted by Article IV hereof) of all of the Equipment
Notes issued pursuant to an Indenture on the Special Distribution Date for such
Special Payment in the following order of priority:

            first, such amount as shall be required to pay (A) all accrued and
      unpaid Liquidity Expenses then in arrears plus (B) the product of (x) the
      aggregate amount of all accrued and unpaid Liquidity Expenses not in
      arrears to such Special Payment Date multiplied by (y) a fraction, the
      numerator of which is the aggregate outstanding principal amount of
      Equipment Notes being redeemed, purchased or prepaid on such Special
      Payment Date and the denominator of which is the aggregate outstanding
      principal amount of all Equipment Notes, shall be distributed to the
      Liquidity Providers pari passu on the basis of the amount of Liquidity
      Expenses owed to each Liquidity Provider;

            second, such amount as shall be required to pay (A) all accrued and
      unpaid interest then in arrears on all Liquidity Obligations (other than
      interest in respect of a Downgrade Drawing or a Non-Extension Drawing)
      plus (B) the product of (x) the aggregate amount of all accrued and unpaid
      interest on all Liquidity Obligations not in arrears to such Special
      Payment Date (at the rate provided in the applicable Liquidity Facility)
      multiplied by (y) a fraction, the numerator of which is the aggregate
      outstanding principal amount of Equipment Notes being redeemed, purchased
      or prepaid on such Special Payment Date and the denominator of which is
      the aggregate outstanding principal amount of all Equipment Notes, shall
      be distributed to the Liquidity Providers pari passu on the basis of the
      amount of such accrued and unpaid interest owed to each Liquidity
      Provider;

            third, such amount as shall be required (A) if any Cash Collateral
      Account had been previously funded as provided in Section 3.6(f), to fund
      such Cash Collateral Account up to its Required Amount shall be deposited
      in such Account, (B) if any Liquidity Facility shall become a Downgraded
      Facility or a Non-Extended Facility at a time when unreimbursed Interest
      Drawings under such Liquidity Facility have reduced the Available Amount
      thereunder to zero, to deposit into the related Cash Collateral Account an
      amount equal to such Account's Required Amount shall be deposited in such
      Account, and (C) if, with respect to any particular Liquidity Facility,
      neither subclause (A) nor subclause (B) of this clause "third" are
      applicable, to pay or reimburse the Liquidity Provider in respect of such
      Liquidity Facility in an amount equal to the amount of any unreimbursed
      Interest Drawings under such Liquidity Facility shall be distributed


                                      -23-
<PAGE>

      to such Liquidity Provider, pari passu on the basis of the amounts of all
      such deficiencies and/or unreimbursed Interest Drawings;

            fourth, if, with respect to any particular Liquidity Facility, any
      amounts are to be distributed pursuant to either subclause (A) or (B) of
      clause "third" above, then the Liquidity Provider with respect to such
      Liquidity Facility shall be paid the excess of (x) the aggregate
      outstanding amount of unreimbursed advances (whether or not then due)
      under such Liquidity Facility over (y) the Required Amount for the
      relevant Class, pari passu on the basis of such amounts in respect of each
      Liquidity Provider;

            fifth, such amount as shall be required to pay in full Expected
      Distributions to the holders of Class A Certificates on such Special
      Distribution Date shall be distributed to the Class A Trustee;

            sixth, such amount as shall be required to pay in full Expected
      Distributions to the holders of Class B Certificates on such Special
      Distribution Date shall be distributed to the Class B Trustee;

            seventh, such amount as shall be required to pay in full Expected
      Distributions to the holders of Class C Certificates on such Special
      Distribution Date shall be distributed to the Class C Trustee; and

            eighth, the balance, if any, of such Special Payment shall be
      transferred to the Collection Account for distribution in accordance with
      Section 3.2 hereof.

            (ii) Upon the occurrence of a Triggering Event (whether or not
      continuing), the Subordination Agent shall make distributions pursuant to
      this Section 2.4(b) of amounts on deposit in the Special Payments Account
      on account of the redemption or purchase of all of the Equipment Notes
      issued pursuant to an Indenture on the Special Distribution Date for such
      Special Payment in accordance with Section 3.3 hereof.

            (c) Other Special Payments. Except as provided in clause (e) below,
any amounts on deposit in the Special Payments Account other than in respect of
amounts to be distributed pursuant to Section 2.4(b) shall be distributed on the
Special Distribution Date therefor in accordance with Article III hereof.

            (d) Investment of Amounts in Special Payments Account. Any amounts
on deposit in the Special Payments Account prior to the distribution thereof
pursuant to Section 2.4(b) or (c) shall be invested in accordance with Section
2.2(b). Investment Earnings on such investments shall be distributed in
accordance with Section 2.4(b) or (c), as the case may be.

            (e) Certain Payments. The Subordination Agent will distribute
promptly upon receipt thereof (i) any indemnity payment received by it from the
Owner Participant, the Owner Trustee or Northwest in respect of any Trustee, any
Liquidity Provider, Paying Agent, Depositary or any Escrow Agent (collectively,
the "Payees") and (ii) any compensation (including, without


                                      -24-
<PAGE>

limitation, any fees payable to any Liquidity Provider under Section 2.03 of any
Liquidity Facility) received by it from the Owner Participant, the Owner Trustee
or Northwest under any Operative Agreement in respect of any Payee, directly to
the Payee entitled thereto.

            SECTION 2.5 Designated Representatives. (a) With the delivery of
this Agreement, the Subordination Agent shall furnish to each Liquidity Provider
and each Trustee, and from time to time thereafter may furnish to each Liquidity
Provider and each Trustee, at the Subordination Agent's discretion, or upon any
Liquidity Provider's or Trustee's request (which request shall not be made more
than one time in any 12-month period), a certificate (a "Subordination Agent
Incumbency Certificate") of a Responsible Officer of the Subordination Agent
certifying as to the incumbency and specimen signatures of the officers of the
Subordination Agent and the attorney-in-fact and agents of the Subordination
Agent (the "Subordination Agent Representatives") authorized to give Written
Notices on behalf of the Subordination Agent hereunder. Until each Liquidity
Provider and Trustee receives a subsequent Subordination Agent Incumbency
Certificate, it shall be entitled to rely on the last Subordination Agent
Incumbency Certificate delivered to it hereunder.

            (b) With the delivery of this Agreement, each Trustee shall furnish
to the Subordination Agent, and from time to time thereafter may furnish to the
Subordination Agent, at such Trustee's discretion, or upon the Subordination
Agent's request (which request shall not be made more than one time in any
12-month period), a certificate (a "Trustee Incumbency Certificate") of a
Responsible Officer of such Trustee certifying as to the incumbency and specimen
signatures of the officers of such Trustee and the attorney-in-fact and agents
of such Trustee (the "Trustee Representatives") authorized to give Written
Notices on behalf of such Trustee hereunder. Until the Subordination Agent
receives a subsequent Trustee Incumbency Certificate, it shall be entitled to
rely on the last Trustee Incumbency Certificate delivered to it hereunder.

            (c) With the delivery of this Agreement, each Liquidity Provider
shall furnish to the Subordination Agent, and from time to time thereafter may
furnish to the Subordination Agent, at such Liquidity Provider's discretion, or
upon the Subordination Agent's request (which request shall not be made more
than one time in any 12-month period), a certificate (an "LP Incumbency
Certificate") of any authorized signatory of such Liquidity Provider certifying
as to the incumbency and specimen signatures of any officer, attorney-in-fact,
agent or other designated representative of such Liquidity Provider (the "LP
Representatives" and, together with the Trustee Representatives, the "Designated
Representatives") authorized to give Written Notices on behalf of such Liquidity
Provider hereunder. Until the Subordination Agent receives a subsequent LP
Incumbency Certificate, it shall be entitled to rely on the last LP Incumbency
Certificate delivered to it hereunder.

            SECTION 2.6 Controlling Party. (a) The Trustees and the Liquidity
Providers hereby agree that, with respect to any Indenture at any given time,
the Loan Trustee thereunder will be directed (i) in taking, or refraining from
taking, any action with respect to such Indenture or the Equipment Notes issued
thereunder, so long as no Indenture Default has occurred and is continuing
thereunder, by the holders of at least a majority of the outstanding principal
amount of


                                      -25-
<PAGE>

such Equipment Notes (provided that, for so long as the Subordination Agent is
the registered holder of the Equipment Notes, the Subordination Agent shall act
with respect to this clause (i) in accordance with the directions of the
Trustees representing holders of Certificates representing an undivided interest
in such principal amount of Equipment Notes), and (ii) after the occurrence and
during the continuance of an Indenture Default thereunder (which, in the case of
an Indenture pertaining to a Leased Aircraft, has not been cured by the
applicable Owner Trustee or the applicable Owner Participant, if applicable,
pursuant to Section 4.03 of such Indenture), in taking, or refraining from
taking, any action with respect to such Indenture or such Equipment Notes,
including exercising remedies thereunder (including accelerating the Equipment
Notes issued thereunder or foreclosing the Lien on the Aircraft securing such
Equipment Notes), by the Controlling Party.

            (b) The Person who shall be the "Controlling Party" with respect to
any Indenture shall be: (w) the Class A Trustee, (x) upon payment of Final
Distributions to the holders of Class A Certificates, the Class B Trustee and
(y) upon payment of Final Distributions to the holders of Class B Certificates,
the Class C Trustee. For purposes of giving effect to the foregoing, the
Trustees (other than the Controlling Party) irrevocably agree (and the
Certificateholders (other than the Certificateholders represented by the
Controlling Party) shall be deemed to agree by virtue of their purchase of
Certificates) that the Subordination Agent, as record holder of the Equipment
Notes, shall exercise its voting rights in respect of the Equipment Notes as
directed by the Controlling Party and any vote so exercised shall be binding
upon the Trustees and all Certificateholders.

            The Subordination Agent shall give written notice to all of the
other parties to this Agreement promptly upon a change in the identity of the
Controlling Party. Each of the parties hereto agrees that it shall not exercise
any of the rights of the Controlling Party at such time as it is not the
Controlling Party hereunder; provided, however, that nothing herein contained
shall prevent or prohibit any Non-Controlling Party from exercising such rights
as shall be specifically granted to such Non-Controlling Party hereunder and
under the other Operative Agreements.

            (c) Notwithstanding the foregoing, at any time after 18 months from
the earliest to occur of (i) the date on which the entire Available Amount under
any Liquidity Facility shall have been drawn (for any reason other than a
Downgrade Drawing or a Non-Extension Drawing) and remain unreimbursed, (ii) the
date on which the entire amount of any Downgrade Drawing or Non-Extension
Drawing has been withdrawn from a Cash Collateral Account to pay interest on the
related Class of Certificates and remains unreimbursed and (iii) the date on
which all Equipment Notes shall have been Accelerated (provided that with
respect to the period prior to the Delivery Period Expiry Date, such Equipment
Notes have an aggregate outstanding principal balance in excess of
$300,000,000), the Liquidity Providers with a majority of unreimbursed Liquidity
Obligations shall have the right to elect, by Written Notice to the
Subordination Agent and each of the Trustees, to become the Controlling Party
hereunder with respect to any Indenture at any time from and including the last
day of such 18-month period.

            (d) The exercise of remedies by the Controlling Party under this
Agreement shall be expressly limited by Section 4.1(a)(ii) hereof.


                                      -26-
<PAGE>

            (e) The Controlling Party shall not be entitled to require or
obligate any Non-Controlling Party to provide funds necessary to exercise any
right or remedy hereunder.

                                  ARTICLE III

                   RECEIPT, DISTRIBUTION AND APPLICATION OF
                               AMOUNTS RECEIVED

            SECTION 3.1 Written Notice of Distribution. (a) No later than 3:00
P.M. (New York City time) on the Business Day immediately preceding each
Distribution Date (or Special Distribution Date for purposes of Section 2.4(b)
hereof, as the case may be), each of the following Persons shall deliver to the
Subordination Agent a Written Notice setting forth the following information as
at the close of business on such Business Day:

            (i) With respect to the Class A Certificates, the Class A Trustee
      shall separately set forth the amounts to be paid in accordance with
      clause "fifth" of Section 3.2 or Section 2.4(b), as the case may be,
      hereof;

            (ii) With respect to the Class B Certificates, the Class B Trustee
      shall separately set forth the amounts to be paid in accordance with
      clause "sixth" of Section 3.2 or Section 2.4(b), as the case may be,
      hereof;

            (iii) With respect to the Class C Certificates, the Class C Trustee
      shall separately set forth the amounts to be paid in accordance with
      clause "seventh" of Section 3.2 or Section 2.4(b), as the case may be,
      hereof;

            (iv) With respect to each Liquidity Facility, the Liquidity Provider
      thereunder shall separately set forth the amounts to be paid in accordance
      with clauses "first", "second", "third" and "fourth" of Section 3.2 or
      Section 2.4(b), as the case may be, hereof; and

            (v) Each Trustee shall set forth the amounts to be paid in
      accordance with clause "ninth" of Section 3.2 hereof.

The notices required under this Section 3.1(a) shall be provided to the
Subordination Agent by the parties referenced therein or by any one of them
pursuant to an agreement between the parties referred to therein, and may state
that, unless there has been a prepayment of the Certificates, such notice is to
remain in effect until any substitute notice or amendment shall be given to the
Subordination Agent by the party providing such notice.

            (b) Following the occurrence of a Triggering Event, the
Subordination Agent shall request the following information from the following
Persons, and each of the following Persons shall, upon the request of the
Subordination Agent, deliver a Written Notice to the Subordination Agent setting
forth for such Person the following information:


                                      -27-
<PAGE>

            (i) With respect to the Class A Certificates, the Class A Trustee
      shall separately set forth the amounts to be paid in accordance with
      clauses "first" (relating to reimbursement payments made by the Class A
      Certificateholders) and "seventh" of Section 3.3 hereof;

            (ii) With respect to the Class B Certificates, the Class B Trustee
      shall separately set forth the amounts to be paid in accordance with
      clauses "first" (relating to reimbursement payments made by the Class B
      Certificateholders) and "eighth" of Section 3.3 hereof;

            (iii) With respect to the Class C Certificates, the Class C Trustee
      shall separately set forth the amounts to be paid in accordance with
      clauses "first" (relating to reimbursement payments made by the Class C
      Certificateholders) and "ninth" of Section 3.3 hereof;

            (iv) With respect to each Liquidity Facility, the Liquidity Provider
      thereunder shall separately set forth the amounts to be paid in accordance
      with clauses "second," "third", "fourth" and "fifth" of Section 3.3
      hereof; and

            (v) Each Trustee shall set forth the amounts to be paid in
      accordance with clause "sixth" of Section 3.3 hereof.

            (c) At such time as a Trustee or a Liquidity Provider shall have
received all amounts owing to it (and, in the case of a Trustee, the
Certificateholders for which it is acting) pursuant to Section 2.4, 3.2 or 3.3
hereof, as applicable, and, in the case of a Liquidity Provider, its commitment
under the related Liquidity Facility shall have terminated or expired, such
Person shall, by a Written Notice, so inform the Subordination Agent and each
other party to this Agreement.

            (d) As provided in Section 6.5 hereof, the Subordination Agent shall
be fully protected in relying on any of the information set forth in a Written
Notice provided by any Trustee or any Liquidity Provider pursuant to paragraphs
(a) through (c) above and shall have no independent obligation to verify,
calculate or recalculate any amount set forth in any Written Notice delivered in
accordance with such paragraphs.

            (e) Any Written Notice delivered by a Trustee or a Liquidity
Provider, as applicable, pursuant to Section 3.1(a), 3.1(b) or 3.1(c) hereof, if
made prior to 10:00 A.M. (New York City time) shall be effective on the date
delivered (or if delivered later shall be effective as of the next Business
Day). Subject to the terms of this Agreement, the Subordination Agent shall as
promptly as practicable comply with any such instructions; provided, however,
that any transfer of funds pursuant to any instruction received after 10:00 A.M.
(New York City time) on any Business Day may be made on the next succeeding
Business Day.

            (f) In the event the Subordination Agent shall not receive from any
Person any information set forth in paragraphs (a) or (b) above which is
required to enable the Subordination


                                      -28-
<PAGE>

Agent to make a distribution to such Person pursuant to Section 3.2 or 3.3
hereof, the Subordination Agent shall request such information in writing and,
failing to receive any such information, the Subordination Agent shall, after
written notice to such person, not make such distribution(s) to such Person. In
such event, the Subordination Agent shall make distributions pursuant to clauses
"first" through "eighth" of Section 3.2 and clauses "first" through "ninth" of
Section 3.3 to the extent it shall have sufficient information to enable it to
make such distributions, and shall continue to hold any funds remaining, after
making such distributions, until the Subordination Agent shall receive all
necessary information to enable it to distribute any funds so withheld.

            (g) On such dates (but not more frequently than monthly) as any
Liquidity Provider or any Trustee shall request, the Subordination Agent shall
send to such party a written statement reflecting all amounts on deposit with
the Subordination Agent pursuant to Section 3.1(f) hereof.

            SECTION 3.2 Distribution of Amounts on Deposit in the Collection
Account. Except as otherwise provided in Sections 2.4, 3.1(f), 3.3, 3.4 and
3.6(b), amounts on deposit in the Collection Account (or, in the case of any
amount described in Section 2.4(c), on deposit in the Special Payments Account)
shall be promptly distributed on each Distribution Date (or, in the case of any
amount described in Section 2.4(c), on the Special Distribution Date therefor)
in the following order of priority and in accordance with the information
provided to the Subordination Agent pursuant to Section 3.1(a) hereof:

            first, such amount as shall be required to pay all accrued and
      unpaid Liquidity Expenses owed to each Liquidity Provider shall be
      distributed to the Liquidity Providers pari passu on the basis of the
      amount of Liquidity Expenses owed to each Liquidity Provider;

            second, such amount as shall be required to pay in full the
      aggregate amount of interest accrued on all Liquidity Obligations (at the
      rate provided in the applicable Liquidity Facility, but not including
      interest in respect of a Downgrade Drawing or a Non-Extension Drawing) and
      unpaid shall be distributed to the Liquidity Providers pari passu on the
      basis of the amount of Liquidity Obligations owed to each Liquidity
      Provider;

            third, such amount as shall be required (A) if any Cash Collateral
      Account had been previously funded as provided in Section 3.6(f), to fund
      such Account up to its Required Amount shall be deposited in such Account,
      (B) if any Liquidity Facility shall become a Downgraded Facility or a
      Non-Extended Facility at a time when unreimbursed Interest Drawings under
      such Liquidity Facility have reduced the Available Amount thereunder to
      zero, to deposit into the related Cash Collateral Account an amount equal
      to such Account's Required Amount shall be deposited in such Cash
      Collateral Account, and (C) if, with respect to any particular Liquidity
      Facility, neither subclause (A) nor subclause (B) of this clause "third"
      is applicable, to pay or reimburse the Liquidity Provider in respect of
      such Liquidity Facility in an amount equal to the amount of all


                                      -29-
<PAGE>

      Liquidity Obligations then due under such Liquidity Facility (other than
      amounts payable pursuant to clause "first" or "second" of this Section
      3.2) shall be distributed to such Liquidity Provider, pari passu on the
      basis of the amounts of all such deficiencies and/or unreimbursed
      Liquidity Obligations;

            fourth, if, with respect to any particular Liquidity Facility, any
      amounts are to be distributed pursuant to either subclause (A) or (B) of
      clause "third" above, then the Liquidity Provider with respect to such
      Liquidity Facility shall be paid the excess of (x) the aggregate
      outstanding amount of unreimbursed advances (whether or not then due)
      under such Liquidity Facility over (y) the Required Amount for the
      relevant Class, pari passu on the basis of such amounts in respect of each
      Liquidity Provider;

            fifth, such amount as shall be required to pay in full Expected
      Distributions to the holders of the Class A Certificates on such
      Distribution Date shall be distributed to the Class A Trustee;

            sixth, such amount as shall be required to pay in full Expected
      Distributions to the holders of the Class B Certificates on such
      Distribution Date shall be distributed to the Class B Trustee;

            seventh, such amount as shall be required to pay in full Expected
      Distributions to the holders of the Class C Certificates on such
      Distribution Date shall be distributed to the Class C Trustee;

            eighth, such amount as shall be required to pay in full the
      aggregate unpaid amount of fees and expenses payable as of such
      Distribution Date to the Subordination Agent and each Trustee pursuant to
      the terms of this Agreement and the Trust Agreements, as the case may be,
      shall be distributed to the Subordination Agent and such Trustee; and

            ninth, the balance, if any, of any such payment remaining thereafter
      shall be held in the Collection Account for later distribution in
      accordance with this Article III (including the priorities set forth
      therein).

            SECTION 3.3 Distribution of Amounts on Deposit Following a
Triggering Event. (a) Except as otherwise provided in Sections 3.1(f) and 3.6(b)
hereof, upon the occurrence of a Triggering Event and at all times thereafter,
all funds in the Collection Account or the Special Payments Account shall be
promptly distributed by the Subordination Agent in the following order of
priority:

            first, such amount as shall be required to reimburse (i) the
      Subordination Agent for any out-of-pocket costs and expenses actually
      incurred by it (to the extent not previously reimbursed) in the protection
      of, or the realization of the value of, the Equipment Notes or any Trust
      Indenture Estate, shall be applied by the Subordination Agent in
      reimbursement of such costs and expenses, (ii) each Trustee for any
      amounts of


                                      -30-
<PAGE>

      the nature described in clause (i) above actually incurred by it under the
      applicable Trust Agreement (to the extent not previously reimbursed),
      shall be distributed to such Trustee and (iii) any Liquidity Provider or
      Certificateholder for payments, if any, made by it to the Subordination
      Agent or any Trustee in respect of amounts described in clause (i) above,
      shall be distributed to such Liquidity Provider or to the applicable
      Trustee for the account of such Certificateholder, in each such case, pari
      passu on the basis of all amounts described in clauses (i) through (iii)
      above;

            second, such amount remaining as shall be required to pay all
      accrued and unpaid Liquidity Expenses shall be distributed to each
      Liquidity Provider pari passu on the basis of the amount of Liquidity
      Expenses owed to each Liquidity Provider;

            third, such amount remaining as shall be required to pay accrued and
      unpaid interest on the Liquidity Obligations (other than interest in
      respect of a Downgrade Drawing or a Non-Extension Drawing) as provided in
      the Liquidity Facilities shall be distributed to each Liquidity Provider
      pari passu on the basis of the amount of such accrued and unpaid interest
      owed to each Liquidity Provider;

            fourth, such amount remaining as shall be required (A) if any Cash
      Collateral Account had been previously funded as provided in Section
      3.6(f), unless (i) a Performing Note Deficiency exists and a Liquidity
      Event of Default shall have occurred and be continuing with respect to the
      relevant Liquidity Facility or (ii) a Final Drawing shall have occurred
      with respect to such Liquidity Facility, to fund such Account up to its
      Required Amount (less the amount of any repayments of Interest Drawings
      under such Liquidity Facility while subclause (A)(i) above is applicable)
      shall be deposited in such Account, (B) if any Liquidity Facility shall
      become a Downgraded Facility or a Non-Extended Facility at a time when
      unreimbursed Interest Drawings under such Liquidity Facility have reduced
      the Available Amount thereunder to zero, unless (i) a Performing Note
      Deficiency exists and a Liquidity Event of Default shall have occurred and
      be continuing with respect to the relevant Liquidity Facility or (ii) a
      Final Drawing shall have occurred with respect to such Liquidity Facility,
      to deposit into the related Cash Collateral Account an amount equal to
      such Account's Required Amount (less the amount of any repayments of
      Interest Drawings under such Liquidity Facility while subclause (B)(i)
      above is applicable) shall be deposited in such Cash Collateral Account,
      and (C) if, with respect to any particular Liquidity Facility, neither
      subclause (A) nor subclause (B) of this clause "fourth" are applicable, to
      pay in full the outstanding amount of all Liquidity Obligations then due
      under such Liquidity Facility (other than amounts payable pursuant to
      clause "second" or "third" of this Section 3.3) shall be distributed to
      such Liquidity Provider, pari passu on the basis of the amounts of all
      such deficiencies and/or unreimbursed Liquidity Obligations;

            fifth, if, with respect to any particular Liquidity Facility, any
      amounts are to be distributed pursuant to either subclause (A) or (B) of
      clause "fourth" above, then the Liquidity Provider with respect to such
      Liquidity Facility shall be paid the excess of (x) the aggregate
      outstanding amount of unreimbursed advances (whether or not then due)


                                      -31-
<PAGE>

      under such Liquidity Facility over (y) the Required Amount for the
      relevant Class (less the amount of any repayments of Interest Drawings
      under such Liquidity Facility while subclause (A)(i) or (B)(i), as the
      case may be, of clause "fourth" above is applicable), pari passu on the
      basis of such amounts in respect of each Liquidity Provider;

            sixth, such amount as shall be required to reimburse or pay (i) the
      Subordination Agent for any Tax (other than Taxes imposed on compensation
      paid hereunder), expense, fee, charge or other loss incurred by or any
      other amount payable to the Subordination Agent in connection with the
      transactions contemplated hereby (to the extent not previously
      reimbursed), shall be applied by the Subordination Agent in reimbursement
      of such amount, (ii) each Trustee for any Tax (other than Taxes imposed on
      compensation paid under the applicable Trust Agreement), expense, fee,
      charge, loss or any other amount payable to such Trustee under the
      applicable Trust Agreements (to the extent not previously reimbursed),
      shall be distributed to such Trustee and (iii) each Certificateholder for
      payments, if any, made by it pursuant to Section 5.2 hereof in respect of
      amounts described in clause (i) above, shall be distributed to the
      applicable Trustee for the account of such Certificateholder, in each such
      case, pari passu on the basis of all amounts described in clauses (i)
      through (iii) above;

            seventh, such amount remaining as shall be required to pay in full
      Adjusted Expected Distributions on the Class A Certificates shall be
      distributed to the Class A Trustee;

            eighth, such amount remaining as shall be required to pay in full
      Adjusted Expected Distributions on the Class B Certificates shall be
      distributed to the Class B Trustee;

            ninth, such amount remaining as shall be required to pay in full
      Adjusted Expected Distributions on the Class C Certificates shall be
      distributed to the Class C Trustee;

            tenth, such amount remaining shall be retained in the Collection
      Account until the immediately succeeding Distribution Date or, if all
      Classes of Certificates shall have been paid in full, shall be distributed
      to the Owner Trustee to the extent that the amount received from the Loan
      Trustees and deposited in the Collection Account exceed the amounts
      described in clauses "first" through "ninth" above; and

            eleventh, amount remaining shall be distributed to the
      Certificateholders of the related Trust.

            SECTION 3.4 Other Payments. Any payments received by the
Subordination Agent for which no provision as to the application thereof is made
in this Agreement shall be distributed by the Subordination Agent in the order
of priority specified in Section 3.3 hereof.


                                      -32-
<PAGE>

            SECTION 3.5 Payments to the Trustees and the Liquidity Providers.
Any amounts distributed hereunder to any Liquidity Provider shall be paid to
such Liquidity Provider by wire transfer of funds to the address such Liquidity
Provider shall provide to the Subordination Agent. The Subordination Agent shall
provide a Written Notice of any such transfer to the applicable Liquidity
Provider, as the case may be, at the time of such transfer. Any amounts
distributed hereunder by the Subordination Agent to any Trustee which shall not
be the same institution as the Subordination Agent shall be paid to such Trustee
by wire transfer of funds to the address such Trustee shall provide to the
Subordination Agent.

            SECTION 3.6 Liquidity Facilities. (a) Interest Drawings. If on any
Distribution Date, after giving effect to the subordination provisions of this
Agreement, the Subordination Agent shall not have sufficient funds for the
payment of any amounts due and owing in respect of accrued interest on the Class
A Certificates, the Class B Certificates or the Class C Certificates (at the
Stated Interest Rate for such Class of Certificates), then, prior to 12:00 noon
(New York City time) on such Distribution Date, the Subordination Agent shall
request a drawing (each such drawing, an "Interest Drawing") under the Liquidity
Facility with respect to such Class of Certificates in an amount equal to the
lesser of (i) an amount sufficient to pay the amount of such accrued interest
(at the Stated Interest Rate for such Class of Certificates) or (ii) the
Available Amount under such Liquidity Facility, and shall pay such amount to the
Trustee with respect to such Class of Certificates in payment of such accrued
interest.

            (b) Application of Interest Drawings. Notwithstanding anything to
the contrary contained in this Agreement, (i) all payments received by the
Subordination Agent in respect of an Interest Drawing under the Class A
Liquidity Facility and all amounts withdrawn by the Subordination Agent from the
Class A Cash Collateral Account, and payable in each case to the Class A
Certificateholders, shall be promptly distributed to the Class A Trustee and
(ii) all payments received by the Subordination Agent in respect of an Interest
Drawing under the Class B Liquidity Facility and all amounts withdrawn by the
Subordination Agent from the Class B Cash Collateral Account, and payable in
each case to the Class B Certificateholders, shall be promptly distributed to
the Class B Trustee and (iii) all payments received by the Subordination Agent
in respect of an Interest Drawing under the Class C Liquidity Facility and all
amounts withdrawn by the Subordination Agent from the Class C Cash Collateral
Account, and payable in each case to the Class C Certificateholders, shall be
promptly distributed to the Class C Trustee.

            (c) Downgrade Drawings. If at any time the debt rating of any
Liquidity Provider issued by either Rating Agency is lower than the applicable
Threshold Rating, within 30 days after receiving notice of such downgrading (but
no later than the expiration date of the Liquidity Facility issued by the
downgraded Liquidity Provider (the "Downgraded Facility")), such Liquidity
Provider may arrange, or the Subordination Agent (in consultation with
Northwest), may arrange for a Replacement Liquidity Provider to issue and
deliver a Replacement Liquidity Facility to the Subordination Agent. If a
Downgraded Facility has not been replaced in accordance with the terms of this
paragraph, the Subordination Agent shall, on such 30th day (or if such 30th day
is not a Business Day, on the next succeeding Business Day) (or, if earlier, the
expiration date of such Downgraded Facility), request a drawing in accordance
with and to the


                                      -33-
<PAGE>

extent permitted by such Downgraded Facility (such drawing, a "Downgrade
Drawing") of all available and undrawn amounts thereunder. Amounts drawn
pursuant to a Downgrade Drawing shall be maintained and invested as provided in
Section 3.6(f) hereof. The Liquidity Provider may also arrange for a Replacement
Liquidity Provider to issue and deliver a Replacement Liquidity Facility at any
time after such Downgrade Drawing so long as such Downgrade Drawing has not been
reimbursed in full to the Liquidity Provider.

            (d) Non-Extension Drawings. If any Liquidity Facility with respect
to any Class of Certificates is scheduled to expire on a date (the "Stated
Expiration Date") prior to the date that is 15 days after the Final Legal
Distribution Date for such Class of Certificates, then, no earlier than the 60th
day and no later than the 40th day prior to the then Stated Expiration Date, the
Subordination Agent shall request that such Liquidity Provider extend the Stated
Expiration Date for a period of 364 days after the Stated Expiration Date
(unless the obligations of such Liquidity Provider thereunder are earlier
terminated in accordance with such Liquidity Facility). The Liquidity Provider
shall advise the Subordination Agent, no earlier than 40 days and no later than
25 days prior to such Stated Expiration Date, whether, in its sole discretion,
it agrees to so extend the Stated Expiration Date. If, on or before the 25th day
prior to the Stated Expiration Date, such Liquidity Facility shall not have been
so extended or replaced in accordance with Section 3.6(e), or if the Liquidity
Provider fails irrevocably and unconditionally to advise the Subordination Agent
on or before the 25th day prior to the Stated Expiration Date then in effect
that such Stated Expiration Date shall be so extended, the Subordination Agent
shall, on such 25th day (or as soon as possible thereafter), in accordance with
and to the extent permitted by the terms of the expiring Liquidity Facility (a
"Non-Extended Facility"), request a drawing under such expiring Liquidity
Facility (such drawing, a "Non-Extension Drawing") of all available and undrawn
amounts thereunder. Amounts drawn pursuant to any Non-Extension Drawing shall be
maintained and invested in accordance with Section 3.6(f) hereof.

            (e) Issuance of Replacement Liquidity Facility. At any time, the
Subordination Agent may, at its option, in consultation with Northwest, arrange
for a Replacement Liquidity Facility to replace the Liquidity Facility for any
Class of Certificates; provided that, the initial Liquidity Provider may not be
replaced unless there shall have become due to the initial Liquidity Provider
amounts pursuant to Section 3.1, 3.2 or 3.3 of the Liquidity Facilities and the
replacement of the initial Liquidity Provider would reduce or eliminate the
obligation to pay such amounts; provided further that, the Liquidity Provider
may arrange, or the Subordination Agent (in consultation with Northwest) may
arrange, for a Replacement Liquidity Provider pursuant to paragraphs (c) and (d)
of this Section 3.6. In any such consultation, the Subordination Agent shall
accept the recommendations of Northwest in the absence of a good faith reason
not to do so. No such Replacement Liquidity Facility executed in connection
therewith shall become effective and no such Replacement Liquidity Facility
shall be deemed a "Liquidity Facility" under the Operative Agreements, unless
and until (i) the conditions referred to in the immediately following paragraph
shall have been satisfied and (ii) if such Replacement Liquidity Facility shall
materially adversely affect the rights, remedies, interests or obligations of
the Class A Certificateholders, the Class B Certificateholders or the Class C
Certificateholders under any of the Operative Agreements, the applicable Trustee
shall have consented, in writing, to the execution and issuance of such
Replacement Liquidity Facility.


                                      -34-
<PAGE>

            In connection with the issuance of each Replacement Liquidity
Facility, the Subordination Agent shall (x) prior to the issuance of such
Replacement Liquidity Facility, obtain written confirmation from each Rating
Agency that such Replacement Liquidity Facility will not cause a reduction of
the rating then in effect for any Class of Certificates by such Rating Agency
(without regard to any downgrading of the ratings of any Liquidity Provider
being replaced pursuant to Section 3.6(c) hereof), (y) pay all Liquidity
Obligations then owing to the replaced Liquidity Provider (which payment shall
be made first from available funds in the Cash Collateral Account as described
in clause (vii) of Section 3.6(f) hereof and thereafter from any other available
source, including, without limitation, a drawing under the Replacement Liquidity
Facility, it being understood that no Replacement Liquidity Facility shall
become effective (other than insofar as necessary to permit the repayment of
amounts owed to the replaced Liquidity Provider) until all amounts owed to the
replaced Liquidity Provider have been paid) and (z) cause the issuer of the
Replacement Liquidity Facility to deliver the Replacement Liquidity Facility to
the Subordination Agent, together with a legal opinion opining that such
Replacement Liquidity Facility is an enforceable obligation of such Replacement
Liquidity Provider. Upon satisfaction of the conditions set forth in this
Section 3.6(e), (i) the replaced Liquidity Facility shall terminate and (ii)
such Replacement Liquidity Provider shall be deemed to be a Liquidity Provider
with the rights and obligations of a Liquidity Provider hereunder and under the
other Operative Agreements and such Replacement Liquidity Facility shall be
deemed to be a Liquidity Facility hereunder and under the other Operative
Agreements.

            (f) Cash Collateral Accounts; Withdrawals; Investments. In the event
the Subordination Agent shall draw all available amounts under the Class A
Liquidity Facility, the Class B Liquidity Facility or the Class C Liquidity
Facility pursuant to Section 3.6(c), 3.6(d) or 3.6(i), amounts so drawn shall be
deposited by the Subordination Agent in the Class A Cash Collateral Account, the
Class B Cash Collateral Account or the Class C Cash Collateral Account,
respectively. Amounts so deposited shall be invested in Eligible Investments in
accordance with Section 2.2(b) hereof. Investment Earnings on amounts on deposit
in the Cash Collateral Accounts as a result of any drawings under Section 3.6(c)
or 3.6(d) hereof (other than to the extent it becomes a Final Drawing) shall be
paid to the respective Liquidity Provider entitled thereto prior to giving
effect to the distributions below on each Distribution Date commencing on the
first Distribution Date after any such drawing. Investment Earnings on amounts
on deposit in the Cash Collateral Accounts as a result of any drawings under
Section 3.6(i) hereof (and amounts which become a Final Drawing) shall be
deposited in the Collection Account. The Subordination Agent shall deliver a
written statement to the respective Liquidity Provider one day prior to each
Distribution Date setting forth the aggregate amount of Investment Earnings held
in the applicable Cash Collateral Accounts as of such date. In addition, from
and after the date funds are so deposited, the Subordination Agent shall make
withdrawals from such account as follows:

                (i) on each Distribution Date, the Subordination Agent shall, to
      the extent it shall not have received funds to pay accrued and unpaid
      interest on the Class A Certificates (at the Stated Interest Rate for the
      Class A Certificates) from any other source, withdraw from the Class A
      Cash Collateral Account, and pay to the Class A Trustee an amount equal to
      the lesser of (x) an amount necessary to pay accrued and


                                    -35-

<PAGE>

      unpaid interest (at the Stated Interest Rate for the Class A Certificates)
      on such Class A Certificates and (y) the amount on deposit in the Class A
      Cash Collateral Account;

            (ii) on each Distribution Date, the Subordination Agent shall, to
      the extent it shall not have received funds to pay accrued and unpaid
      interest on the Class B Certificates (at the Stated Interest Rate for the
      Class B Certificates) from any other source, withdraw from the Class B
      Cash Collateral Account, and pay to the Class B Trustee an amount equal to
      the lesser of (x) an amount necessary to pay accrued and unpaid interest
      (at the Stated Interest Rate for the Class B Certificates) on such Class B
      Certificates and (y) the amount on deposit in the Class B Cash Collateral
      Account;

            (iii) on each Distribution Date, the Subordination Agent shall, to
      the extent it shall not have received funds to pay accrued and unpaid
      interest on the Class C Certificates (at the Stated Interest Rate for the
      Class C Certificates) from any other source, withdraw from the Class C
      Cash Collateral Account, and pay to the Class C Trustee an amount equal to
      the lesser of (x) an amount necessary to pay accrued and unpaid interest
      (at the Stated Interest Rate for the Class C Certificates) on such Class C
      Certificates and (y) the amount on deposit in the Class C Cash Collateral
      Account;

            (iv) on each date on which the Pool Balance of the Class A Trust
      shall have been reduced by payments made to the Class A Certificateholders
      pursuant to Section 2.4, 3.2 or 3.3 hereof or pursuant to Section 2.03 of
      the Escrow and Paying Agent Agreement for such Class, the Subordination
      Agent shall withdraw from the Class A Cash Collateral Account such amount
      as is necessary so that, after giving effect to the reduction of the Pool
      Balance on such date (including any such reduction resulting from a prior
      withdrawal of amounts on deposit in the Class A Cash Collateral Account on
      such date), the Required Amount (with respect to the Class A Liquidity
      Facility) will be on deposit in the Class A Cash Collateral Account and
      shall first, pay such amount to the Class A Liquidity Provider until the
      Liquidity Obligations (with respect to the Class A Certificates) shall
      have been paid in full, and second, deposit any remaining amount in the
      Collection Account;

            (v) on each date on which the Pool Balance of the Class B Trust
      shall have been reduced by payments made to the Class B Certificateholders
      pursuant to Section 2.4, 3.2 or 3.3 hereof or pursuant to Section 2.03 of
      the Escrow and Paying Agent Agreement for such Class, the Subordination
      Agent shall withdraw from the Class B Cash Collateral Account such amount
      as is necessary so that, after giving effect to the reduction of the Pool
      Balance on such date (including any such reduction resulting from a prior
      withdrawal of amounts on deposit in the Class B Cash Collateral Account on
      such date), the Required Amount (with respect to the Class B Liquidity
      Facility) will be on deposit in the Class B Cash Collateral Account and
      shall first, pay such amount to the Class B Liquidity Provider until the
      Liquidity Obligations (with respect to the Class B Certificates) shall
      have been paid in full, and second, deposit any remaining amount in the
      Collection Account;


                                      -36-
<PAGE>

            (vi) on each date on which the Pool Balance of the Class C Trust
      shall have been reduced by payments made of the Class C Certificateholders
      pursuant to Section 2.4, 3.2 or 3.3 hereof or pursuant to Section 2.03 of
      the Escrow and Paying Agent Agreement for such Class, the Subordination
      Agent shall withdraw from the Class C Cash Collateral Account such amount
      as is necessary so that, after giving effect to the reduction of the Pool
      Balance on such date (including any such reduction resulting from a prior
      withdrawal of amounts on deposit in the Class C Cash Collateral Account on
      such date), the Required Amount (with respect to the Class C Liquidity
      Facility) will be on deposit in the Class C Cash Collateral Account and
      shall first, pay such amount to the Class C Liquidity Provider until the
      Liquidity Obligations (with respect to the Class C Certificates) shall
      have been paid in full, and second, deposit any remaining amount in the
      Collection Account;

            (vii) if a Replacement Liquidity Facility for any Class of
      Certificates shall be delivered to the Subordination Agent following the
      date on which funds have been deposited into the Cash Collateral Account
      for such Class of Certificates, the Subordination Agent shall withdraw all
      amounts on deposit in such Cash Collateral Account and shall pay such
      amounts to each replaced Liquidity Provider pari passu until all Liquidity
      Obligations owed to such Person shall have been paid in full, and shall
      deposit any remaining amount in the Collection Account; and

            (viii) following the payment of Final Distributions with respect to
      any Class of Certificates, on the date on which the Subordination Agent
      shall have been notified by the Liquidity Provider for such Class of
      Certificates that the Liquidity Obligations owed to such Liquidity
      Provider have been paid in full, the Subordination Agent shall withdraw
      all amounts on deposit in the Cash Collateral Account in respect of such
      Class of Certificates and shall deposit such amount in the Collection
      Account.

            (g) Reinstatement. With respect to any Interest Drawing under the
Liquidity Facility for any Trust, upon the reimbursement of the applicable
Liquidity Provider for all or any part of the amount of such Interest Drawing,
together with any accrued interest thereon, the Available Amount of such
Liquidity Facility shall be reinstated by an amount equal to the amount so
reimbursed to the applicable Liquidity Provider, but not to exceed the Required
Amount for such Liquidity Facility; provided, however, that such Liquidity
Facility shall not be so reinstated in part or in full at any time if (x) both
(i) a Triggering Event shall have occurred and (ii) a Performing Note Deficiency
exists or (y) a Liquidity Event of Default shall have occurred and be continuing
under such Liquidity Facility. In the event that at any time prior to both the
occurrence of a Triggering Event and the existence of a Performing Note
Deficiency funds are withdrawn from any Cash Collateral Account pursuant to
clauses (i), (ii) or (iii) of Section 3.6(f) hereof, then funds received by the
Subordination Agent prior to both the occurrence of a Triggering Event and the
existence of a Performing Note Deficiency shall be deposited in such Cash
Collateral Account as provided in clause "third" of Section 2.4(b), clause
"third" of Section 3.2 or clause "fourth" of Section 3.3, as applicable, and
applied in accordance with Section 3.6(f) hereof.


                                      -37-
<PAGE>

            (h) Reimbursement. The amount of each drawing under the Liquidity
Facilities shall be due and payable, together with interest thereon, on the
dates and at the rates, respectively, provided in the Liquidity Facilities.

            (i) Final Drawing. If any action is required under a Liquidity
Facility to be taken by the Subordination Agent in order to make a Final Drawing
thereunder, the Subordination Agent shall not fail to take such action. Upon
receipt of the proceeds of a Final Drawing under the related Liquidity Facility,
the Subordination Agent shall maintain and invest such proceeds in accordance
with Section 3.6(f) hereof.

            (j) Reduction of Stated Amount. Promptly following each date on
which the Required Amount of the Liquidity Facility for a Class of Certificates
is reduced as a result of a distribution to the Certificateholders of such Class
of Certificates, the Subordination Agent shall, if such Liquidity Facility
provides for reductions of the Stated Amount of such Liquidity Facility and if
such reductions are not automatic, request the Liquidity Provider for such Class
of Certificates to reduce such Stated Amount to an amount equal to the Required
Amount with respect to such Liquidity Facility (as calculated by the
Subordination Agent after giving effect to such payment). Each such request
shall be made in accordance with the provisions of the applicable Liquidity
Facility.

            (k) Relation to Subordination Provisions. Interest Drawings under
the Liquidity Facilities and withdrawals from the Cash Collateral Accounts, in
each case, in respect of interest on the Certificates of any Class, will be
distributed to the Trustee for such Class of Certificates, notwithstanding
Sections 3.2, 3.3 and 3.6(h) hereof.

                                  ARTICLE IV

                             EXERCISE OF REMEDIES

            SECTION 4.1 Directions from the Controlling Party. (a) (i) Following
the occurrence and during the continuation of an Indenture Default under any
Indenture, the Controlling Party shall direct the Loan Trustee under such
Indenture in the exercise of remedies available to the holders of the Equipment
Notes issued pursuant to such Indenture, including, without limitation, the
ability to vote all such Equipment Notes in favor of declaring all of the unpaid
principal amount of such Equipment Notes and accrued interest thereon to be due
and payable under, and in accordance with, the provisions of such Indenture.
Subject to the Owner Trustees' and the Owner Participants' rights, if any, set
forth in the Indentures with respect to Leased Aircraft to purchase the
Equipment Notes, if the Equipment Notes issued pursuant to any Indenture have
been Accelerated following an Indenture Default with respect thereto, the
Controlling Party may sell, assign, contract to sell or otherwise dispose of and
deliver all (but not less than all) of such Equipment Notes to any Person at
public or private sale, at any location at the option of the Controlling Party,
all upon such terms and conditions as it may reasonably deem advisable in
accordance with applicable law.


                                      -38-
<PAGE>

            (ii) Subject to the Owner Trustees' and the Owner Participants'
rights set forth in the Indentures with respect to Leased Aircraft to purchase
the Equipment Notes, and notwithstanding the foregoing, so long as any
Certificates remain Outstanding, during the period ending on the date which is
nine months after the earlier of (x) the Acceleration of the Equipment Notes
issued pursuant to any Indenture or (y) the occurrence of a Northwest Bankruptcy
Event, without the consent of each Trustee, (A) no Aircraft subject to the Lien
of such Indenture or such Equipment Notes may be sold if the net proceeds from
such sale would be less than the Minimum Sale Price for such Aircraft or such
Equipment Notes, and (B) with respect to any Leased Aircraft, the amount and
payment dates of rentals payable by Northwest under the Lease for such Aircraft
may not be adjusted, if, as a result of such adjustment, the discounted present
value of all such rentals would be less than 75% of the discounted present value
of the rentals payable by Northwest under such Lease before giving effect to
such adjustment, in each case, using the weighted average interest rate of the
Equipment Notes issued pursuant to such Indenture as the discount rate.

            (iii) At the request of the Controlling Party, the Subordination
Agent may from time to time during the continuance of an Indenture Default (and
before the occurrence of a Triggering Event) commission LTV Appraisals with
respect to the related Aircraft.

            (iv) After a Triggering Event occurs and any Equipment Note becomes
a NonPerforming Equipment Note, the Subordination Agent shall obtain LTV
Appraisals for the Aircraft as soon as practicable and additional LTV Appraisals
on or prior to each anniversary of the date of such initial LTV Appraisals;
provided that, if the Controlling Party reasonably objects to the appraised
value of the Aircraft shown in any such LTV Appraisals, the Controlling Party
shall have the right to obtain or cause to be obtained at its expense substitute
LTV Appraisals (including any LTV Appraisals based upon physical inspection of
the Aircraft).

            (b) The Controlling Party shall take such actions as it may
reasonably deem most effectual to complete the sale or other disposition of such
Aircraft or Equipment Notes. In addition, in lieu of any sale, assignment,
contract to sell or other disposition, the Subordination Agent, on behalf of the
Controlling Party, may maintain possession of such Equipment Notes and continue
to apply monies received in respect of such Equipment Notes in accordance with
Article III hereof. In addition, in lieu of such sale, assignment, contract to
sell or other disposition, or in lieu of such maintenance of possession, the
Controlling Party may instruct the Loan Trustee under such Indenture to
foreclose on the Lien on the related Aircraft or to take any other remedial
action permitted under such Indenture or applicable law.

            SECTION 4.2 Remedies Cumulative. Each and every right, power and
remedy given to the Trustees, the Liquidity Providers, the Controlling Party or
the Subordination Agent specifically or otherwise in this Agreement shall be
cumulative and shall be in addition to every other right, power and remedy
herein specifically given or now or hereafter existing at law, in equity or by
statute, and each and every right, power and remedy whether specifically herein
given or otherwise existing may, subject always to the terms and conditions
hereof, be exercised from time to time and as often and in such order as may be
deemed expedient by any Trustee, any Liquidity Provider, the Controlling Party
or the Subordination Agent, as appropriate, and the


                                      -39-
<PAGE>

exercise or the beginning of the exercise of any power or remedy shall not be
construed to be a waiver of the right to exercise at the same time or thereafter
any other right, power or remedy. No delay or omission by any Trustee, any
Liquidity Provider, the Controlling Party or the Subordination Agent in the
exercise of any right, remedy or power or in the pursuit of any remedy shall
impair any such right, power or remedy or be construed to be a waiver of any
default or to be an acquiescence therein.

            SECTION 4.3 Discontinuance of Proceedings. In case any party to this
Agreement (including the Controlling Party in such capacity) shall have
instituted any Proceeding to enforce any right, power or remedy under this
Agreement by foreclosure, entry or otherwise, and such Proceedings shall have
been discontinued or abandoned for any reason or shall have been determined
adversely to the Person instituting such Proceeding, then and in every such case
each such party shall, subject to any determination in such proceedings, be
restored to its former position and rights hereunder, and all rights, remedies
and powers of such party shall continue as if no such Proceedings had been
instituted.

            SECTION 4.4 Right of Certificateholders to Receive Payments Not to
Be Impaired. Anything in this Agreement to the contrary notwithstanding but
subject to each Trust Agreement, the right of any Certificateholder or any
Liquidity Provider, respectively, to receive payments pursuant to Section 2.4,
3.2 or 3.3 hereof when due, or to institute suit for the enforcement of any such
payment on or after the applicable Distribution Date, shall not be impaired or
affected without the consent of such Certificateholder or such Liquidity
Provider, respectively.

            SECTION 4.5 Undertaking for Costs. In any suit for the enforcement
of any right or remedy under this Agreement or in any suit against any
Controlling Party or the Subordination Agent for any action taken or omitted by
it as Controlling Party or Subordination Agent, as the case may be, a court in
its discretion may require the filing by any party litigant in the suit of an
undertaking to pay the costs of the suit, and the court in its discretion may
assess reasonable costs, including reasonable attorneys' fees and expenses,
against any party litigant in the suit, having due regard to the merits and good
faith of the claims or defenses made by the party litigant. The provisions of
this Section do not apply to a suit instituted by the Subordination Agent, a
Liquidity Provider or a Trustee or a suit by Certificateholders holding more
than 10% of the original principal amount of any Class of Certificates.

                                   ARTICLE V

                      DUTIES OF THE SUBORDINATION AGENT;
                         AGREEMENTS OF TRUSTEES, ETC.

            SECTION 5.1 Notice of Indenture Default or Triggering Event. (a) In
the event the Subordination Agent shall have actual knowledge of the occurrence
of an Indenture Default or a Triggering Event, as promptly as practicable, and
in any event within 10 days after obtaining knowledge thereof, the Subordination
Agent shall transmit by mail to the Rating Agencies, the


                                      -40-
<PAGE>

Liquidity Providers and the Trustees notice of such Indenture Default or
Triggering Event, unless such Indenture Default or Triggering Event shall have
been cured or waived. For all purposes of this Agreement, in the absence of
actual knowledge on the part of a Responsible Officer, the Subordination Agent
shall not be deemed to have knowledge of any Indenture Default or Triggering
Event unless notified in writing by one or more Trustees, one or more Liquidity
Providers or one or more Certificateholders.

            (b) Other Notices. The Subordination Agent will furnish to each
Liquidity Provider and Trustee, promptly upon receipt thereof, duplicates or
copies of all reports, notices, requests, demands, certificates, financial
statements and other instruments furnished to the Subordination Agent as
registered holder of the Equipment Notes or otherwise in its capacity as
Subordination Agent to the extent the same shall not have been otherwise
directly distributed to such Liquidity Provider or Trustee, as applicable,
pursuant to the express provision of any other Operative Agreement.

            SECTION 5.2 Indemnification. The Subordination Agent shall not be
required to take any action or refrain from taking any action under Section 5.1
(other than the first sentence thereof) or Article IV hereof unless the
Subordination Agent shall have been indemnified (to the extent and in the manner
reasonably satisfactory to the Subordination Agent) against any liability, cost
or expense (including counsel fees and expenses) which may be incurred in
connection therewith. The Subordination Agent shall not be under any obligation
to take any action under this Agreement and nothing contained in this Agreement
shall require the Subordination Agent to expend or risk its own funds or
otherwise incur any financial liability in the performance of any of its duties
hereunder or in the exercise of any of its rights or powers if it shall have
reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it. The
Subordination Agent shall not be required to take any action under Section 5.1
(other than the first sentence thereof) or Article IV hereof, nor shall any
other provision of this Agreement be deemed to impose a duty on the
Subordination Agent to take any action, if the Subordination Agent shall have
been advised by counsel that such action is contrary to the terms hereof or is
otherwise contrary to law.

            SECTION 5.3 No Duties Except as Specified in Intercreditor
Agreement. The Subordination Agent shall not have any duty or obligation to take
or refrain from taking any action under, or in connection with, this Agreement,
except as expressly provided by the terms of this Agreement; and no implied
duties or obligations shall be read into this Agreement against the
Subordination Agent. The Subordination Agent agrees that it will, in its
individual capacity and at its own cost and expense (but without any right of
indemnity in respect of any such cost or expense under Section 7.1 hereof)
promptly take such action as may be necessary to duly discharge all Liens on any
of the Trust Accounts or any monies deposited therein which result from claims
against it in its individual capacity not related to its activities hereunder or
from a breach of its obligations that constitute willful misconduct or gross
negligence hereunder or any other Operative Agreement.

            SECTION 5.4 Notice from the Liquidity Providers and Trustees. If a
Responsible Officer of any Liquidity Provider or Trustee has actual notice of an
Indenture


                                      -41-
<PAGE>

Default or a Triggering Event, such Person shall promptly use its best efforts
give notice thereof to all other Liquidity Providers and Trustees and to the
Subordination Agent, provided, however, that no such Person shall have any
liability hereunder as a result of its failure to deliver any such notice.

                                  ARTICLE VI

                            THE SUBORDINATION AGENT

            SECTION 6.1 Authorization; Acceptance of Trusts and Duties. Each of
the Class A Trustee, Class B Trustee and Class C Trustee hereby designates and
appoints the Subordination Agent as the agent and trustee of such Trustee under
the applicable Liquidity Facility and authorizes the Subordination Agent to
enter into the applicable Liquidity Facility as agent and trustee for such
Trustee. Each of the Liquidity Providers and the Trustees hereby designates and
appoints the Subordination Agent as the Subordination Agent under this
Agreement.

            The Subordination Agent hereby accepts the duties hereby created and
applicable to it as the Subordination Agent and agrees to perform the same but
only upon the terms of this Agreement and agrees to receive and disburse all
monies received by it in accordance with the terms hereof. The Subordination
Agent shall not be answerable or accountable under any circumstances, except (a)
for its own willful misconduct or gross negligence or, with respect to the
handling or transfer of funds, ordinary negligence, (b) as provided in Section
2.2 hereof and (c) for liabilities that may result from the material inaccuracy
of any representation or warranty of the Subordination Agent made in its
individual capacity in any Operative Agreement. The Subordination Agent shall
not be liable for any error of judgment made in good faith by a Responsible
Officer of the Subordination Agent, unless it is proved that the Subordination
Agent was negligent in ascertaining the pertinent facts.

            SECTION 6.2 Absence of Duties. The Subordination Agent shall have no
duty to see to any recording or filing of this Agreement or any other document,
or to see to the maintenance of any such recording or filing.

            SECTION 6.3 No Representations or Warranties as to Documents. The
Subordination Agent in its individual capacity does not make nor shall be deemed
to have made any representation or warranty as to the validity, legality or
enforceability of this Agreement or any other Operative Agreement or as to the
correctness of any statement contained in any thereof, except for the
representations and warranties of the Subordination Agent, made in its
individual capacity, under any Operative Agreement to which it is a party. The
Certificateholders, the Trustees and the Liquidity Providers make no
representation or warranty hereunder whatsoever.

            SECTION 6.4 No Segregation of Monies; No Interest. Any monies paid
to or retained by the Subordination Agent pursuant to any provision hereof and
not then required to be distributed to any Trustee or any Liquidity Provider as
provided in Articles II and III hereof need


                                      -42-
<PAGE>

not be segregated in any manner except to the extent required by such Articles
II and III and by law, and the Subordination Agent shall not (except as
otherwise provided in Section 2.2 hereof) be liable for any interest thereon;
provided, however, that any payments received or applied hereunder by the
Subordination Agent shall be accounted for by the Subordination Agent so that
any portion thereof paid or applied pursuant hereto shall be identifiable as to
the source thereof.

            SECTION 6.5 Reliance; Agents; Advice of Counsel. The Subordination
Agent shall not incur liability to anyone in acting upon any signature,
instrument, notice, resolution, request, consent, order, certificate, report,
opinion, bond or other document or paper believed by it to be genuine and
believed by it to be signed by the proper party or parties. As to the Pool
Balance of any Trust as of any date, the Subordination Agent may for all
purposes hereof rely on a certificate signed by any Responsible Officer of the
applicable Trustee, and such certificate shall constitute full protection to the
Subordination Agent for any action taken or omitted to be taken by it in good
faith in reliance thereon. As to any fact or matter relating to the Liquidity
Providers or the Trustees the manner of ascertainment of which is not
specifically described herein, the Subordination Agent may for all purposes
hereof rely on a certificate, signed by any Responsible Officer of the
applicable Liquidity Provider or Trustee, as the case may be, as to such fact or
matter, and such certificate shall constitute full protection to the
Subordination Agent for any action taken or omitted to be taken by it in good
faith in reliance thereon. The Subordination Agent shall assume, and shall be
fully protected in assuming, that each of the Liquidity Providers and each of
the Trustees are authorized to enter into this Agreement and to take all action
to be taken by them pursuant to the provisions hereof, and shall not inquire
into the authorization of each of the Liquidity Providers and each of the
Trustees with respect thereto. In the administration of the trusts hereunder,
the Subordination Agent may execute any of the trusts or powers hereof and
perform its powers and duties hereunder directly or through agents or attorneys
and may consult with counsel, accountants and other skilled persons to be
selected and retained by it, and the Subordination Agent shall not be liable for
the acts or omissions of any agent appointed with due care or for anything done,
suffered or omitted in good faith by it in accordance with the advice or written
opinion of any such counsel, accountants or other skilled persons.

            SECTION 6.6 Capacity in Which Acting. The Subordination Agent acts
hereunder solely as agent and trustee herein and not in its individual capacity,
except as otherwise expressly provided in the Operative Agreements.

            SECTION 6.7 Compensation. The Subordination Agent shall be entitled
to reasonable compensation, including expenses and disbursements, for all
services rendered hereunder and shall have a priority claim to the extent set
forth in Article III hereof on all monies collected hereunder for the payment of
such compensation, to the extent that such compensation shall not be paid by
others. The Subordination Agent agrees that it shall have no right against any
Trustee or Liquidity Provider for any fee as compensation for its services as
agent under this Agreement. The provisions of this Section 6.7 shall survive the
termination of this Agreement.

            SECTION 6.8 May Become Certificateholder. The institution acting as
Subordination Agent hereunder may become a Certificateholder and have all rights
and benefits


                                      -43-
<PAGE>

of a Certificateholder to the same extent as if it were not the institution
acting as the Subordination Agent.

            SECTION 6.9 Subordination Agent Required; Eligibility. There shall
at all times be a Subordination Agent hereunder which shall be a corporation
organized and doing business under the laws of the United States of America or
of any State or the District of Columbia having a combined capital and surplus
of at least $100,000,000 (or the obligations of which, whether now in existence
or hereafter incurred, are fully and unconditionally guaranteed by a corporation
organized and doing business under the laws of the United States, any State
thereof or of the District of Columbia and having a combined capital and surplus
of at least $100,000,000), if there is such an institution willing and able to
perform the duties of the Subordination Agent hereunder upon reasonable or
customary terms. Such corporation shall be a citizen of the United States and
shall be authorized under the laws of the United States or any State thereof or
of the District of Columbia to exercise corporate trust powers and shall be
subject to supervision or examination by federal, state or District of Columbia
authorities. If such corporation publishes reports of condition at least
annually, pursuant to law or to the requirements of any of the aforesaid
supervising or examining authorities, then, for the purposes of this Section
6.9, the combined capital and surplus of such corporation shall be deemed to be
its combined capital and surplus as set forth in its most recent report of
condition so published.

            In case at any time the Subordination Agent shall cease to be
eligible in accordance with the provisions of this Section, the Subordination
Agent shall resign immediately in the manner and with the effect specified in
Section 8.1.

            SECTION 6.10 Money to Be Held in Trust. All Equipment Notes, monies
and other property deposited with or held by the Subordination Agent pursuant to
this Agreement shall be held in trust for the benefit of the parties entitled to
such Equipment Notes, monies and other property. All such Equipment Notes,
monies or other property shall be held in the Trust Department of the
institution acting as Subordination Agent hereunder.

                                  ARTICLE VII

                    INDEMNIFICATION OF SUBORDINATION AGENT

            SECTION 7.1 Scope of Indemnification. The Subordination Agent shall
be indemnified hereunder to the extent and in the manner described in Section
6(c) of the Participation Agreements and Section 7 of the Note Purchase
Agreement. The indemnities contained in such Section 7(c) shall survive the
termination of this Agreement.


                                      -44-
<PAGE>

                                 ARTICLE VIII

                         SUCCESSOR SUBORDINATION AGENT

            SECTION 8.1 Replacement of Subordination Agent; Appointment of
Successor. The Subordination Agent may resign at any time by so notifying the
Trustees and the Liquidity Providers. The Liquidity Provider or the Controlling
Party may remove the Subordination Agent for cause by so notifying the
Subordination Agent and may appoint a successor Subordination Agent. The
Controlling Party shall remove the Subordination Agent if:

            (1) the Subordination Agent fails to comply with Section 6.9 hereof;

            (2) the Subordination Agent is adjudged bankrupt or insolvent;

            (3) a receiver or other public officer takes charge of the
      Subordination Agent or its property; or

            (4) the Subordination Agent otherwise becomes incapable of acting.

            If the Subordination Agent resigns or is removed or if a vacancy
exists in the office of Subordination Agent for any reason (the Subordination
Agent in such event being referred to herein as the retiring Subordination
Agent), the Controlling Party in consultation with Northwest shall promptly
appoint a successor Subordination Agent.

            Any corporation into which the Subordination Agent may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Subordination Agent
shall be a party, or any corporation to which substantially all the corporate
trust business of the Subordination Agent may be transferred, shall, subject to
the terms of Section 6.9 hereof, be the Subordination Agent hereunder and under
the other Operative Agreements to which the Subordination Agent is a party
without further act, except that such Person shall give prompt subsequent notice
of such transaction to the Liquidity Provider and each Trustee,

            A successor Subordination Agent shall deliver a written acceptance
of its appointment as Subordination Agent hereunder to the retiring
Subordination Agent, upon which the resignation or removal of the retiring
Subordination Agent shall become effective, and the successor Subordination
Agent shall have all the rights, powers and duties of the Subordination Agent
under this Agreement. The successor Subordination Agent shall send a written
notice of its succession to the Liquidity Providers and the Trustees. The
retiring Subordination Agent shall promptly transfer its rights under each of
the Liquidity Facilities and all of the property held by it as Subordination
Agent to the successor Subordination Agent.

            If a successor Subordination Agent does not take office within 60
days after the retiring Subordination Agent resigns or is removed, the retiring
Subordination Agent or one or


                                      -45-
<PAGE>

more of the Trustees may petition any court of competent jurisdiction for the
appointment of a successor Subordination Agent.

            If the Subordination Agent fails to comply with Section 6.9 hereof
(to the extent applicable), one or more of the Trustees or one or more of the
Liquidity Providers or Northwest may petition any court of competent
jurisdiction for the removal of the Subordination Agent and the appointment of a
successor Subordination Agent.

            Notwithstanding the foregoing, no resignation or removal of the
Subordination Agent shall be effective unless and until a successor has been
appointed. No appointment of a successor Subordination Agent shall be effective
unless and until the Rating Agencies shall have delivered a Ratings
Confirmation.

                                  ARTICLE IX

                          SUPPLEMENTS AND AMENDMENTS

            SECTION 9.1 Amendments, Waivers, Etc. (a) This Agreement may not be
supplemented, amended or modified without the consent of each Trustee (acting,
except in the case of any amendment pursuant to Section 3.6(e)(v)(y) hereof,
with the consent of holders of Certificates of the related Class evidencing
interests in the related Trust aggregating not less than a majority in interest
in such Trust or as otherwise authorized pursuant to the relevant Trust
Agreement), the Subordination Agent and each Liquidity Provider; provided,
however, that this Agreement may be supplemented, amended or modified without
the consent of any Trustee if such supplement, amendment or modification cures
an ambiguity or inconsistency or does not materially adversely affect such
Trustee or the holders of the related Class of Certificates; provided further,
however, that, if such supplement, amendment or modification would (x) directly
or indirectly modify or supersede, or otherwise conflict with, Section 2.2(b),
Section 3.6(e), Section 3.6(f)(other than the last sentence thereof), or the
second sentence of Section 10.6 (collectively, together with this proviso and
Section 9.1, the "Northwest Provisions") or (y) otherwise adversely affect the
interests of a potential Replacement Liquidity Provider or of Northwest with
respect to its ability to replace any Liquidity Facility or with respect to its
payment obligations under any Financing Agreement, Leased or Owned Aircraft
Indenture, then such supplement, amendment or modification shall not be
effective without the additional written consent of Northwest. Notwithstanding
the foregoing, without the consent of each Certificateholder and each Liquidity
Provider, no supplement, amendment or modification of this Agreement may (i)
reduce the percentage of the interest in any Trust evidenced by the Certificates
issued by such Trust necessary to consent to modify or amend any provision of
this Agreement or to waive compliance therewith or (ii) modify Section 2.4, 3.2
or 3.3 hereof, relating to the distribution of monies received by the
Subordination Agent hereunder from the Equipment Notes or pursuant to the
Liquidity Facilities. Nothing contained in this Section shall require the
consent of a Trustee at any time following the payment of Final Distributions
with respect to the related Class of Certificates.


                                      -46-
<PAGE>

            (b) In the event that the Subordination Agent, as the registered
holder of any Equipment Notes, receives a request for its consent to any
amendment, modification, consent or waiver under such Equipment Notes, the
Indenture pursuant to which such Equipment Notes were issued, or the related
Lease, Participation Agreement or other related document, (i) if no Indenture
Default shall have occurred and be continuing with respect to such Indenture,
the Subordination Agent shall request directions with respect to each Series of
such Equipment Notes from the Trustee of the Trust which holds such Equipment
Notes and shall vote or consent in accordance with the directions of such
Trustee and (ii) if any Indenture Default (which, in the case of any Indenture
pertaining to a Leased Aircraft, has not been cured by the applicable Owner
Trustee or the applicable Owner Participant, if applicable, pursuant to Section
4.03 of such Indenture) shall have occurred and be continuing with respect to
such Indenture, the Subordination Agent will exercise its voting rights as
directed by the Controlling Party, subject to Sections 4.1 and 4.4 hereof;
provided that no such amendment, modification or waiver shall, without the
consent of each Liquidity Provider, reduce the amount of rent, supplemental rent
or stipulated loss values payable by Northwest under any Lease or reduce the
amount of principal or interest payable by Northwest under any Equipment Note
issued under any Indenture in respect of an Owned Aircraft

            SECTION 9.2 Subordination Agent Protected. If, in the reasonable
opinion of the institution acting as the Subordination Agent hereunder, any
document required to be executed pursuant to the terms of Section 9.1 affects
any right, duty, immunity or indemnity with respect to it under this Agreement
or any Liquidity Facility, the Subordination Agent may in its discretion decline
to execute such document.

            SECTION 9.3 Effect of Supplemental Agreements. Upon the execution of
any amendment or supplement hereto pursuant to the provisions hereof, this
Agreement shall be and be deemed to be modified and amended in accordance
therewith and the respective rights, limitations of rights, obligations, duties
and immunities under this Agreement of the parties hereto and beneficiaries
hereof shall thereafter be determined, exercised and enforced hereunder subject
in all respects to such modifications and amendments, and all the terms and
conditions of any such supplemental agreement shall be and be deemed to be part
of the terms and conditions of this Agreement for any and all purposes. In
executing or accepting any supplemental agreement permitted by this Article IX,
the Subordination Agent shall be entitled to receive, and shall be fully
protected in relying upon, an opinion of counsel stating that the execution of
such supplemental agreement is authorized or permitted by this Agreement.

            SECTION 9.4 Notice to Rating Agencies. Promptly following its
receipt of each amendment, consent, modification, supplement or waiver
contemplated by this Article IX, the Subordination Agent shall send a copy
thereof to each Rating Agency.

            SECTION 9.5 Addition of Class D Trustee. If with respect to any
Aircraft Class D Certificates are issued, this Agreement shall be amended by
written agreement of Northwest and the Subordination Agent to provide for the
subordination of such Class D Certificates to the Class A Certificates, the
Class B Certificates and the Class C Certificates substantially in the same
manner as the Class C Certificates are subordinated hereunder to the Class B
Certificates


                                      -47-
<PAGE>

and the Class A Certificates. No such amendment shall materially adversely
affect any Trustee. The amendment to this Agreement to give effect to the
issuance of any Class D Certificates shall include, without limitation:

            (i) the Class D Trust Trustee shall be added as a party to this
      Agreement; and

            (ii) the definitions of "Cash Collateral Account," "Certificate,"
      "Class," "Equipment Notes," "Final Legal Distribution Date," "Liquidity
      Facilities," "Liquidity Provider," "LTV Ratio," "Stated Interest Rate,"
      "Trust," "Trust Agreement" and "Controlling Party" shall be revised, as
      appropriate, to reflect the issuance of the Class D Certificates (and the
      subordination thereof); and

If with respect to any Aircraft, Series D Equipment Notes are issued to any
Person other than the Class D Trust, this Agreement shall be amended by written
agreement of Northwest and the Subordination Agent to (i) provide for each
holder of a Series D Equipment Note to be bound by the provisions of Section
2.6(a) hereof so that the Controlling Party shall be entitled to direct the Loan
Trustee as provided therein (and such Series D Equipment Notes shall make
effective provision therefor so as to bind each holder thereof to such
provisions of Section 2.6(a) hereof) and (ii) to revise the definitions of
"Controlling Party" and "Equipment Notes", as appropriate, to reflect the
issuance of the Series D Equipment Notes (and the prior rights, as against the
holders of such Series D Equipment Notes, of the Class A Trustee, the Class B
Trustee and the Class C Trustee to be such "Controlling Party"). No such
amendment shall materially adversely affect any Trustee.

                                   ARTICLE X

                                 MISCELLANEOUS

            SECTION 10.1 Termination of Intercreditor Agreement. Following
payment of Final Distributions with respect to each Class of Certificates and
the payment in full of all Liquidity Obligations to the Liquidity Providers and
provided that there shall then be no other amounts due to the
Certificateholders, the Trustees, the Liquidity Providers and the Subordination
Agent hereunder or under the Trust Agreements, and that the commitment of the
Liquidity Providers under the Liquidity Facilities shall have expired or been
terminated, this Agreement and the trusts created hereby shall terminate and
this Agreement shall be of no further force or effect. Except as aforesaid or
otherwise provided, this Agreement and the trusts created hereby shall continue
in full force and effect in accordance with the terms hereof.

            SECTION 10.2 Intercreditor Agreement for Benefit of Trustees,
Liquidity Providers and Subordination Agent. Nothing in this Agreement, whether
express or implied, shall be construed to give to any Person other than the
Trustees, the Liquidity Providers and the Subordination Agent any legal or
equitable right, remedy or claim under or in respect of this Agreement.


                                      -48-
<PAGE>

            SECTION 10.3 Notices. Unless otherwise expressly specified or
permitted by the terms hereof, all notices, requests, demands, authorizations,
directions, consents, waivers or documents provided or permitted by this
Agreement to be made, given, furnished or filed shall be in writing, mailed by
certified mail, postage prepaid, or by confirmed telecopy and

            (i) if to the Subordination Agent, addressed to it at its office at:

                  c/o State Street Bank and Trust Company
                  Two International Place
                  Boston, Massachusetts  02110
                  Attention:  Corporate Trust Department
                  Fax:  (612) 726-0655

            (ii) if to the Trustee, addressed to it at its office at:

                  State Street Bank and Trust Company of Connecticut, National
                        Association
                  225 Asylum Street, Goodwin Square
                  Hartford, Connecticut 06103
                  Attention:  Corporate/Muni Department
                  Fax:  (860) 244-1889

            (iii) if to any Liquidity Provider, addressed to it at its office
                  at:

                  Citibank, N.A.
                  Two Penns' Way, Suite 200
                  New Castle, Delaware  19720
                  Attention:  Tim Smith, Global Loans
                  Fax:  (302) 894-6120

                  With a copy to:

                  Citibank, N.A.
                  Global Aviation
                  399 Park Avenue, 12th Floor
                  New York, NY  10043
                  Attention:  Tom Boyle
                  Fax:  (212) 793-1246

Whenever any notice in writing is required to be given by any Trustee or
Liquidity Provider or the Subordination Agent to any of the other of them, such
notice shall be deemed given and such requirement satisfied when such notice is
received, if such notice is mailed by certified mail, postage prepaid or by
courier service or if such notice is sent by confirmed telecopy addressed as
provided above. Any party hereto may change the address to which notices to such
party will be sent by giving notice of such change to the other parties to this
Agreement.


                                      -49-
<PAGE>

            SECTION 10.4 Severability. Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

            SECTION 10.5 No Oral Modifications or Continuing Waivers. No terms
or provisions of this Agreement may be changed, waived, discharged or terminated
orally, but only by an instrument in writing signed by the party or other Person
against whom enforcement of the change, waiver, discharge or termination is
sought and any other party or other Person whose consent is required pursuant to
this Agreement and any waiver of the terms hereof shall be effective only in the
specific instance and for the specific purpose given.

            SECTION 10.6 Successors and Assigns. All covenants and agreements
contained herein shall be binding upon, and inure to the benefit of, each of the
parties hereto and the successors and assigns of each, all as herein provided.

            SECTION 10.7 Headings. The headings of the various Articles and
Sections herein and in the table of contents hereto are for convenience of
reference only and shall not define or limit any of the terms or provisions
hereof.

            SECTION 10.8 Counterpart Form. This Agreement may be executed by the
parties hereto in separate counterparts, each of which when so executed and
delivered shall be an original, but all such counterparts shall together
constitute but one and the same agreement.

            SECTION 10.9 Subordination. (a) As between the Liquidity Providers,
on the one hand, and the Trustees and the Certificateholders, on the other hand,
this Agreement shall be a subordination agreement for purposes of Section 510 of
the United States Bankruptcy Code, as amended from time to time.

            (b) Notwithstanding the provisions of this Agreement, if prior to
the payment in full to the Liquidity Providers of all Liquidity Obligations then
due and payable, any party hereto shall have received any payment or
distribution in respect of Equipment Notes or any other amount under the
Indentures or other Operative Agreements which, had the subordination provisions
of this Agreement been properly applied to such payment, distribution or other
amount, would not have been distributed to such Person, then such payment,
distribution or other amount shall be received and held in trust by such Person
and paid over or delivered to the Subordination Agent for application as
provided herein.

            (c) If any Trustee, any Liquidity Provider or the Subordination
Agent receives any payment in respect of any obligations owing hereunder (or, in
the case of the Liquidity Providers, in respect of the Liquidity Obligations),
which is subsequently invalidated, declared preferential, set aside and/or
required to be repaid to a trustee, receiver or other party, then, to the extent
of such payment, such obligations (or, in the case of the Liquidity Providers,
such Liquidity


                                      -50-
<PAGE>

Obligations) intended to be satisfied shall be revived and continue in full
force and effect as if such payment had not been received.

            (d) The Trustees (on behalf of themselves and the holders of
Certificates), the Liquidity Providers and the Subordination Agent confirm that
the payment priorities specified in Sections 2.4, 3.2 and 3.3 shall apply in all
circumstances, notwithstanding the fact that the obligations owed to the
Trustees and the holders of Certificates are secured by certain assets and the
Liquidity Obligations are not so secured. The Trustees expressly agree (on
behalf of themselves and the holders of Certificates) not to assert priority
over the holders of Liquidity Obligations due to their status as secured
creditors in any bankruptcy, insolvency or other legal proceeding.

            (e) Each of the Trustees (on behalf of themselves and the holders of
Certificates), the Liquidity Providers and the Subordination Agent may take any
of the following actions without impairing its rights under this Agreement:

            (i) obtain a lien on any property to secure any amounts owing to it
      hereunder, including, in the case of the Liquidity Providers, the
      Liquidity Obligations,

            (ii) obtain the primary or secondary obligation of any other obligor
      with respect to any amounts owing to it hereunder, including, in the case
      of the Liquidity Providers, any of the Liquidity Obligations,

            (iii) renew, extend, increase, alter or exchange any amounts owing
      to it hereunder, including, in the case of the Liquidity Providers, any of
      the Liquidity Obligations, or release or compromise any obligation of any
      obligor with respect thereto,

            (iv) refrain from exercising any right or remedy, or delay in
      exercising such right or remedy, which it may have, or

            (v) take any other action which might discharge a subordinated party
      or a surety under applicable law;

provided, however, that the taking of any such actions by any of the Trustees,
the Liquidity Providers or the Subordination Agent shall not prejudice the
rights or adversely affect the obligations of any other party under this
Agreement.

            SECTION 10.10 Governing Law. THIS AGREEMENT SHALL IN ALL RESPECTS BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK,
INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE.

            SECTION 10.11 Submission to Jurisdiction; Waiver of Jury Trial;
Waiver of Immunity. (a) Each of the parties hereto hereby irrevocably and
unconditionally:


                                      -51-
<PAGE>

            (i) submits for itself and its property in any legal action or
      proceeding relating to this Agreement or any other Operative Agreement, or
      for recognition and enforcement of any judgment in respect hereof or
      thereof, to the nonexclusive general jurisdiction of the courts of the
      State of New York, the courts of the United States of America for the
      Southern District of New York, and the appellate courts from any thereof;

            (ii) consents that any such action or proceedings may be brought in
      such courts, and waives any objection that it may now or hereafter have
      that the venue of any such action or proceeding was brought in an
      inconvenient court and agrees not to plead or claim the same;

            (iii) agrees that service of process in any such action or
      proceeding may be effected by mailing a copy thereof by registered or
      certified mail (or any substantially similar form and mail), postage
      prepaid, to each party hereto at its address set forth in Section 10.3
      hereof, or at such other address of which the other parties shall have
      been notified pursuant thereto; and

            (iv) agrees that nothing herein shall affect the right to effect
      service of process in any other manner permitted by law or shall limit the
      right to sue in any other jurisdiction.

            (b) EACH OF THE PARTIES HERETO HEREBY AGREES TO WAIVE ITS RESPECTIVE
RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT
OF THIS AGREEMENT OR ANY DEALINGS BETWEEN THEM RELATING TO THE SUBJECT MATTER OF
THIS AGREEMENT AND THE RELATIONSHIP THAT IS BEING ESTABLISHED, including,
without limitation, contract claims, tort claims, breach of duty claims and all
other common law and statutory claims. Each of the parties warrants and
represents that it has reviewed this waiver with its legal counsel, and that it
knowingly and voluntarily waives its jury trial rights following consultation
with such legal counsel. THIS WAIVER IS IRREVOCABLE, AND CANNOT BE MODIFIED
EITHER ORALLY OR IN WRITING, AND THIS WAIVER SHALL APPLY TO ANY SUBSEQUENT
AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS AGREEMENT.


                                      -52-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed by their respective officers thereunto duly authorized, as of
the day and year first above written, and acknowledge that this Agreement has
been made and delivered in the City of New York, and this Agreement has become
effective only upon such execution and delivery.

                                STATE STREET BANK AND TRUST
                                      COMPANY OF CONNECTICUT,
                                      NATIONAL ASSOCIATION, not in its
                                      individual capacity but solely as Trustee
                                      for each of the Trusts

                                By: /s/ Donald E. Smith
                                   ----------------------------------------
                                   Name: DONALD E. SMITH
                                   Title: VICE PRESIDENT


                                CITIBANK, N.A., as Class A Liquidity Provider,
                                Class B Liquidity Provider and Class C Liquidity
                                Provider

                                By: /s/ Thomas Boyle
                                    ---------------------------------------
                                    Name:  THOMAS BOYLE
                                    Title: Managing Director
                                           Global Aviation
                                           399P/12/2
                                           (212) 559-6149


                                STATE STREET BANK AND TRUST COMPANY,
                                      not in its individual capacity except as
                                      expressly set forth herein but solely as
                                      Subordination Agent and trustee

                                By: /s/ Donald E. Smith
                                   ----------------------------------------
                                   Name: DONALD E. SMITH
                                   Title: VICE PRESIDENT


                                      -53-
<PAGE>

                                                         SCHEDULE 1 TO
                                                         INTERCREDITOR AGREEMENT

                           Participation Agreements



- --------------------------------------------------------------------------------

                              DEPOSIT AGREEMENT
                                  (Class A)

                          Dated as of June 25, 1999

                                   between

                  FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                               as Escrow Agent,

                                     and

                      ABN AMRO BANK N.V., CHICAGO BRANCH,
                                as Depositary

- --------------------------------------------------------------------------------
<PAGE>

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

                                    ARTICLE 1

FORMATION OF DEPOSITS........................................................2
            Section 1.1 Acceptance of Depositary.............................2
            Section 1.2 Establishment of Accounts............................2

                                    ARTICLE 2

MAINTENANCE OF DEPOSITS......................................................2
            Section 2.1 Deposits.............................................2
            Section 2.2 Interest.............................................3
            Section 2.3 Withdrawals..........................................3
            Section 2.4   Other Accounts.....................................4

                                    ARTICLE 3

TERMINATION..................................................................4

                                    ARTICLE 4

PAYMENTS.....................................................................4

                                    ARTICLE 5

REPRESENTATIONS AND WARRANTIES...............................................5

                                    ARTICLE 6

TRANSFER.....................................................................6

                                    ARTICLE 7

AMENDMENT....................................................................6

                                    ARTICLE 8

NOTICES......................................................................7
<PAGE>

                                    ARTICLE 9

OBLIGATIONS UNCONDITIONAL....................................................7

                                   ARTICLE 10

ENTIRE AGREEMENT.............................................................7

                                   ARTICLE 11

GOVERNING LAW................................................................8

                                   ARTICLE 12

WAIVER OF JURY TRIAL RIGHT...................................................8

                                   ARTICLE 13

COUNTERPARTS.................................................................8

Schedule I  Schedule of Deposits

Exhibit A   Notice of Purchase Withdrawal

Exhibit B   Notice of Final Withdrawal


                                       ii
<PAGE>

      This DEPOSIT AGREEMENT (Class A) dated as of June 25, 1999 (as amended,
modified or supplemented from time to time, this "Agreement") between First
Security Bank, National Association, as Escrow Agent under the Escrow and Paying
Agent Agreement referred to below (in such capacity, together with its
successors in such capacity, the "Escrow Agent"), and ABN AMRO BANK N.V.,
Chicago Branch, as depositary bank (the "Depositary").

                               W I T N E S S E T H

      WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and State Street Bank and Trust Company of Connecticut, National Association,
not in its individual capacity except as otherwise expressly provided therein,
but solely as trustee (in such capacity, together with its successors in such
capacity, the "Pass Through Trustee") have entered into a Trust Supplement,
dated June 25, 1999, to the Pass Through Trust Agreement dated as of June 3,
1999, by and among the Guarantor, Northwest and the Pass Through Trustee (the
"Basic Agreement") relating to Northwest Airlines Pass Through Trust 1999-2A
pursuant to which the Northwest Airlines Pass Through Trust, Series 1999-2A
Certificates referred to therein (the "Certificates") are being issued;

      WHEREAS, Northwest and Salomon Smith Barney Inc., Credit Suisse First
Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
Inc., and Deutsche Bank Securities Inc. (collectively, the "Underwriters" and,
together with their respective transferees and assigns as registered owners of
the Certificates, the "Investors") have entered into an Underwriting Agreement
dated as of June 18, 1999 pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

      WHEREAS, Northwest, the Pass Through Trustee, certain other pass through
trustees and certain other persons concurrently herewith are entering into the
Note Purchase Agreement, dated as of the date hereof (the "Note Purchase
Agreement"), pursuant to which the Pass Through Trustee has agreed to acquire
from time to time on or prior to the Delivery Period Termination Date (as
defined in the Note Purchase Agreement) equipment notes (the "Equipment Notes")
issued to finance the acquisition of aircraft by Northwest, as lessee or as
owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

      WHEREAS, the Escrow Agent, the Underwriters, the Pass Through Trustee and
State Street Bank and Trust Company, as paying agent for the Escrow Agent (in
such capacity, together with its successors in such capacity, the "Paying
Agent") concurrently herewith are entering into an Escrow and Paying Agent
Agreement, dated as of the date hereof (as amended, modified or supplemented
from time to time in accordance with the terms thereof, the "Escrow and Paying
Agent Agreement"); and

      WHEREAS, the Underwriters and the Pass Through Trustee intend that the Net
Proceeds be held in escrow by the Escrow Agent pursuant to the Escrow and Paying
Agent Agreement, subject to withdrawal upon request of and proper certification
by the Pass Through Trustee for
<PAGE>

                                                 [Deposit Agreement (Class A)]

the purpose of purchasing Equipment Notes, and that pending such withdrawal the
Net Proceeds be deposited by the Escrow Agent with the Depositary pursuant to
this Agreement, which provides for the Depositary to pay interest for
distribution to the Investors and to establish accounts from which the Escrow
Agent shall make withdrawals upon request of and proper certification by the
Pass Through Trustee.

      NOW, THEREFORE, in consideration of the obligations contained herein, and
for other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties hereto hereby agree as follows:

                                    ARTICLE 1
                              FORMATION OF DEPOSITS

      Section 1.1 Acceptance of Depositary. The Depositary hereby agrees to act
as depositary bank as provided herein and in connection therewith to accept all
amounts to be delivered to or held by the Depositary pursuant to the terms of
this Agreement. The Depositary further agrees to hold, maintain and safeguard
the Deposits and the Accounts (as defined below) during the term of this
Agreement in accordance with the provisions of this Agreement. The Escrow Agent
shall not have any right to withdraw, assign or otherwise transfer moneys held
in the Accounts except as permitted by this Agreement.

      Section 1.2 Establishment of Accounts. The Escrow Agent hereby instructs
the Depositary, and the Depositary agrees, to establish the separate deposit
accounts listed on Schedule I hereto and to establish such additional separate
deposit accounts as may be required in connection with the deposits contemplated
by Section 2.4 hereof (each, an "Account" and collectively, the "Accounts"),
each in the name of the Escrow Agent and all on the terms and conditions set
forth in this Agreement.

                                    ARTICLE 2
                             MAINTENANCE OF DEPOSITS

      Section 2.1 Deposits. The Escrow Agent shall direct the Underwriters to
deposit with the Depositary on the date of this Agreement (the "Deposit Date")
in Federal (same day) funds by wire transfer to: Federal Reserve Bank, New York,
ABN NY ABA #02009580, Account: Chicago Treasury, Reference: Northwest Airlines
1999-2 EETC, and the Depositary shall accept from the Underwriters, on behalf of
the Escrow Agent, the sum of US$343,254,000. Upon acceptance of such sum, the
Depositary shall (i) establish each of the deposits specified in Schedule I
hereto maturing on the respective dates (each such date, as it may be extended
from time to time in accordance with the Indemnity Agreement through the
Delivery Period Termination Date, a "Maturity Date") set forth therein
(including any deposit made pursuant to


                                      2
<PAGE>

                                                 [Deposit Agreement (Class A)]

Section 2.4 hereof, individually, a "Deposit" and, collectively, the "Deposits")
and (ii) credit each Deposit to the related Account as set forth therein. No
amount shall be deposited in any Account other than the related Deposit.

      Section 2.2 Interest. Each Deposit shall bear interest from and including
the date of deposit to but excluding the earlier of (x) date of withdrawal and
(y) such Deposit's Maturity Date at the rate of 7.575% per annum (computed on
the basis of a year of twelve 30-day months) payable to the Paying Agent on
behalf of the Escrow Agent semiannually in arrears on each March 1 and September
1, commencing on March 1, 2000 (each, an "Interest Payment Date"), and on the
date of the Final Withdrawal (as defined below), all in accordance with the
terms of this Agreement (whether or not any such Deposit is withdrawn on an
Interest Payment Date). Interest accrued on any Deposit that is withdrawn
pursuant to a Notice of Purchase Withdrawal (as defined below) shall be paid on
the next Interest Payment Date, notwithstanding any intervening Final Withdrawal
(such remaining interest being hereinafter referred to as a "Carryover
Deposit").

      Section 2.3 Withdrawals. On and after the date four (4) days after the
establishment of the Designated Deposits (such "Designated Deposits" being the
three (3) deposits that the Escrow Agent designates in writing on the Deposit
Date to be withdrawn prior to the expiration of seven (7) days after such
establishment) and each New Deposit, the Escrow Agent may, by providing at least
one (1) Business Day's prior notice of withdrawal to the Depositary in the form
of Exhibit A hereto (a "Notice of Purchase Withdrawal"), withdraw not less than
the entire balance of such Deposits. On and after the date seven (7) days after
the establishment of each Deposit other than a Designated Deposit, the Escrow
Agent may, by providing at least one (1) Business Day's prior Notice of Purchase
Withdrawal, withdraw not less than the entire balance of such Deposit. At any
time prior to the actual withdrawal of any such Deposit, the Escrow Agent or the
Pass Through Trustee may, by notice to the Depositary, cancel such withdrawal
(including on the scheduled date therefor), and thereafter such Deposit shall
continue to be maintained by the Depositary in accordance with the original
terms thereof. Following such withdrawal the balance in the related Account
shall be zero and the Depositary shall close such Account. As used herein,
"Business Day" means any day, other than a Saturday, Sunday or other day on
which commercial banks are authorized or required by law to close in New York,
New York, Minneapolis, Minnesota, Boston, Massachusetts, Hartford, Connecticut,
Salt Lake City, Utah or Chicago, Illinois.

            (a) The Escrow Agent may, by providing at least fifteen (15) days'
prior notice of withdrawal to the Depositary in the form of Exhibit B hereto (a
"Notice of Final Withdrawal"), withdraw the entire amount of all of the
remaining Deposits together with the payment by the Depositary of all accrued
and unpaid interest on such Deposits to but excluding the specified date of
withdrawal (a "Final Withdrawal"), on such date as shall be specified in such
Notice of Final Withdrawal. If a Notice of Final Withdrawal has not been given
to the Depositary on or before June 1, 2000, and there are unwithdrawn Deposits
on such date, the Depositary shall pay


                                      3
<PAGE>

                                                 [Deposit Agreement (Class A)]

the amount of the Final Withdrawal to the Paying Agent on such date as
designated by Northwest pursuant to the Indemnity Agreement dated as of June 25,
1999 between Northwest and the Depositary but in any event not later than June
16, 2000.

            (b) If the Depositary receives a duly completed Notice of Purchase
Withdrawal or Notice of Final Withdrawal complying with the provisions of this
Agreement, it shall make the payments specified therein in accordance with the
provisions of this Agreement.

      Section 2.4 Other Accounts. On the date of withdrawal of any Deposit, the
Escrow Agent, or the Pass Through Trustee on behalf of the Escrow Agent, shall
be entitled to re-deposit with the Depositary any portion thereof and the
Depositary shall accept the same for deposit hereunder. Any sums so received for
deposit shall be established as a new Deposit and credited to a new Account, all
as more fully provided in Section 2.1 hereof, and thereafter the provisions of
this Agreement shall apply thereto as fully and with the same force and effect
as if such Deposit had been established on the Deposit Date except that (i) such
Deposit may not be withdrawn prior to the date seven days after the
establishment thereof and (ii) such Deposit shall mature on June 16, 2000 and
bear interest as provided in Section 2.2. The Depositary shall promptly give
notice to the Escrow Agent of receipt of each such re-deposit and the account
number assigned thereto.

                                    ARTICLE 3
                                   TERMINATION

      This Agreement shall terminate on the fifth (5th) Business Day after the
later of the date on which (i) all of the Deposits shall have been withdrawn and
paid as provided herein without any re-deposit and (ii) all accrued and unpaid
interest on the Deposits shall have been paid as provided herein, but in no
event prior to the date on which the Depositary shall have performed in full its
obligations hereunder.

                                    ARTICLE 4
                                    PAYMENTS

      All payments (including, without limitation, those Payments made in
respect of Taxes (as defined and provided for below)) made by the Depositary
hereunder shall be paid in United States Dollars and immediately available funds
by wire transfer (i) in the case of accrued interest on the Deposits payable
under Section 2.2 hereof or any Final Withdrawal, directly to the Paying Agent
on behalf of the Escrow Agent at State Street Bank and Trust Company, Two
International Place, Boston, Massachusetts 02110, Attention: Corporate Trust
Department, Reference: Northwest Airlines 1999-2 EETC, or to such other account
as the Paying Agent may direct from time to time in writing to the Depositary
and the Escrow Agent and (ii) in the case of any withdrawal of one or more
Deposits pursuant to a Notice of Purchase Withdrawal, directly to or as directed
by the Pass


                                        4
<PAGE>

                                                 [Deposit Agreement (Class A)]

Through Trustee as specified and in the manner provided in such Notice of
Purchase Withdrawal. The Depositary hereby waives any and all rights of set-off,
combination of accounts, right of retention or similar right (whether arising
under applicable law, contract or otherwise) it may have against the Deposits
howsoever arising. Except as provided below, all payments on or in respect of
each Deposit shall be made free and clear of and without reduction for or on
account of any and all taxes, levies or other impositions or charges
(collectively, "Taxes"). However, if the Depositary or the Paying Agent
(pursuant to Section 2.4 of the Escrow and Paying Agent Agreement) shall be
required by law to deduct or withhold any Taxes from or in respect of any sum
payable hereunder, the Depositary shall: (i) make such deductions or
withholding; (ii) pay the full amount deducted or withheld (including in respect
of such additional amounts) to the competent taxation authority; and (iii) if
the Taxes required to be deducted or withheld are imposed by the Netherlands or
any political subdivision thereof, pay such additional amounts as may be
necessary in order that the actual amount received by the designated recipient
of such sum under this Agreement or the Escrow and Paying Agent Agreement after
such deduction or withholding equals the sum it would have received had no such
deduction or withholding been required. If the date on which any payment due on
any Deposit would otherwise fall on a day which is not a Business Day, such
payment shall be made on the next succeeding Business Day with the same force
and effect as if made on such scheduled date, and no additional interest shall
accrue in respect of such extension.

                                    ARTICLE 5
                         REPRESENTATIONS AND WARRANTIES

      The Depositary hereby represents and warrants to Northwest, the Guarantor,
the Escrow Agent, the Pass Through Trustee and the Paying Agent that:

            (a) it is a bank duly organized and validly existing in good
standing under the laws of its jurisdiction of organization and is duly
qualified to conduct banking business in the State of Illinois through its
Chicago branch;

            (b) it has full power, authority and legal right to conduct its
business and operations as currently conducted and to enter into and perform its
obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement have
been duly authorized by all necessary corporate action on the part of it and do
not require any stockholder approval, or approval or consent of any trustee or
holder of any indebtedness or obligations of it, and such document has been duly
executed and delivered by it and constitutes its legal, valid and binding
obligations enforceable against it in accordance with the terms hereof;


                                      5
<PAGE>

                                                 [Deposit Agreement (Class A)]

            (d) no authorization, consent or approval of, or other action by,
and no notice to or filing with, any United States federal or state governmental
authority or regulatory body is required for the execution, delivery or
performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
Agreement, nor compliance with the terms and provisions hereof, conflicts or
will conflict with or results or will result in, a breach or violation of any of
the terms, conditions or provisions of, or will require any consent or approval
under, any law, governmental rule or regulation or the charter documents, as
amended, or bylaws, as amended, of it or any similar instrument binding on it or
any order, writ, injunction or decree of any court or governmental authority
against it or by which it or any of its properties is bound or any indenture,
mortgage or contract or other agreement or instrument to which it is a party or
by which it or any of its properties is bound, or constitutes or will constitute
a default thereunder or results or will result in the imposition of any lien
upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
suits, investigations or proceedings (whether or not purportedly on behalf of
it) against or affecting it or any of its property before or by any court or
administrative agency which, if adversely determined, (i) would adversely affect
the ability of it to perform its obligations under this Agreement or (ii) would
call into question or challenge the validity of this Agreement or the
enforceability hereof in accordance with the terms hereof, nor is the Depositary
in default with respect to any order of any court, governmental authority,
arbitration board or administrative agency so as to adversely affect its ability
to perform its obligations under this Agreement.

                                    ARTICLE 6
                                    TRANSFER

      Neither party hereto shall be entitled to assign or otherwise transfer
this Agreement (or any interest herein) other than (in the case of the Escrow
Agent) to a successor escrow agent under Section 1.7 of the Escrow and Paying
Agent Agreement, and any purported assignment in violation thereof shall be
void. This Agreement shall be binding upon the parties hereto and their
respective successors and (in the case of the Escrow Agent) permitted assigns.

                                    ARTICLE 7
                                    AMENDMENT

      This Agreement may not be amended, waived or otherwise modified except by
an instrument in writing signed by the party against whom the amendment, waiver
or other modification is sought to be enforced and by the Pass Through Trustee.


                                      6
<PAGE>

                                                 [Deposit Agreement (Class A)]

                                    ARTICLE 8
                                     NOTICES

      Unless otherwise expressly provided herein, any notice or other
communication under this Agreement shall be in writing (including by facsimile)
and shall be deemed to be given and effective upon receipt thereof. All notices
shall be sent to (x) in the case of the Depositary, ABN AMRO BANK N.V., Chicago
Branch, 135 South LaSalle Street, Suite 660, Chicago, IL 60674- 9135, Attention:
Claudia Heldring (Telecopier: 312-606-8428) and ABN AMRO BANK N.V., Chicago
Branch, 181 W. Madison Street, Chicago, IL 60602, Attention: Money Markets Desk
(Telecopier: 312-904-9107) or (y) in the case of the Escrow Agent, First
Security Bank, National Association 79 South Main Street, Salt Lake City, Utah
84111, Attention: Corporate-Trust Services (Telecopier: (801) 246-5053), in each
case, with a copy to the Pass Through Trustee, State Street Bank and Trust
Company of Connecticut, National Association, 225 Asylum Street, Goodwin Square,
Hartford, Connecticut 06103, Attention: Corporate/Muni Department, (Telecopier:
(860) 244-1889) and to Northwest, Northwest Airlines, Inc., Department A4010,
5101 Northwest Drive, St. Paul, MN 55111-3034, Attention: Treasurer (Telecopier:
(612) 726-0665) (or at such other address as any such party may specify from
time to time in a written notice to the parties hereto). On or prior to the
execution of this Agreement, the Escrow Agent has delivered to the Depositary a
certificate containing specimen signatures of the representatives of the Escrow
Agent who are authorized to give notices and instructions with respect to this
Agreement. The Depositary may conclusively rely on such certificate until the
Depositary receives written notice from the Escrow Agent to the contrary.

                                    ARTICLE 9
                            OBLIGATIONS UNCONDITIONAL

      The Depositary hereby acknowledges and agrees that its obligation to repay
each Deposit together with interest thereon as provided herein is absolute,
irrevocable and unconditional and constitutes a full recourse obligation of the
Depositary enforceable against it to the full extent of all of its assets and
properties.

                                   ARTICLE 10
                                ENTIRE AGREEMENT

      This Agreement (including all attachments hereto) sets forth all of the
promises, covenants, agreements, conditions and understandings between the
Depositary and the Escrow Agent with respect to the subject matter hereof and
supersedes all prior and contemporaneous agreements and undertakings,
inducements or conditions, express or implied, oral or written.


                                        7
<PAGE>

                                                 [Deposit Agreement (Class A)]

                                   ARTICLE 11
                                  GOVERNING LAW

      THIS AGREEMENT, AND THE RIGHTS AND OBLIGATIONS OF THE DEPOSITARY AND THE
ESCROW AGENT WITH RESPECT TO THE DEPOSITS, SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK AND SUBJECT TO THE
PROVISIONS OF REGULATION D OF THE BOARD OF GOVERNORS OF THE FEDERAL RESERVE
SYSTEM (OR ANY SUCCESSOR), AS THE SAME MAY BE MODIFIED AND SUPPLEMENTED AND IN
EFFECT FROM TIME TO TIME.

                                   ARTICLE 12
                           WAIVER OF JURY TRIAL RIGHT

      EACH OF THE DEPOSITARY AND THE ESCROW AGENT ACKNOWLEDGES AND ACCEPTS THAT
IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT
SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

                                   ARTICLE 13
                                  COUNTERPARTS

      This Agreement may be executed in one or more counterparts, all of which
taken together shall constitute one instrument.

                               *        *        *


                                      8
<PAGE>

                                                 [Deposit Agreement (Class A)]

      IN WITNESS WHEREOF, the Escrow Agent and the Depositary have caused this
Deposit Agreement to be duly executed as of the day and year first above
written.

                                   FIRST SECURITY BANK, NATIONAL
                                   ASSOCIATION,
                                   as Escrow Agent

                                   By: /s/ Greg A. Hawley
                                       -----------------------------------------
                                       Name: Greg A. Hawley
                                       Title: Vice President


                                   ABN AMRO BANK N.V., CHICAGO BRANCH,
                                   as Depositary

                                   By: /s/ Claudia C. Heldring
                                       -----------------------------------------
                                       Name: Claudia C. Heldring
                                       Title: Vice President

                                   By: /s/ Carla S. Waggoner
                                       -----------------------------------------
                                       Name: Carla S. Waggoner
                                       Title: Assistant Vice President
<PAGE>

                                                                    Schedule I

                              SCHEDULE OF DEPOSITS

                                    (Class A)

                                                             MATURITY
  DATE    TAIL NO.    DEPOSIT AMOUNT      ACCOUNT NO.          DATE
  ----    --------    --------------      -----------          ----

 6/25/99   N364NW      17,783,607.91         437028          6/30/99
 6/25/99   N365NW      17,783,607.91         437200          6/30/99
 6/25/99   N366NW      17,825,471.56         437242          6/30/99
 6/25/99   N367NW      19,306,279.40         437288          7/15/99
 6/25/99   N368NW      19,363,124.75         437314          7/15/99
 6/25/99   N369NW      19,418,075.15         437327          7/15/99
 6/25/99   N370NW      18,443,833.32         437345          7/23/99
 6/25/99   N301NW      15,871,553.83         437360           8/2/99
 6/25/99   N302NW      15,871,553.83         437385           8/2/99
 6/25/99   N303NW      15,871,553.83         437391          8/16/99
 6/25/99   N304NW      15,777,154.26         437397           9/1/99
 6/25/99   N305NW      15,777,154.26         437402           9/1/99
 6/25/99   N306NW      15,777,154.26         437419          9/15/99
 6/25/99   N307NW      16,019,728.86         437423          11/1/99
 6/25/99   N308NW      16,019,728.86         437429          11/1/99
 6/25/99   N309NW      16,019,728.86         437432         11/15/99
 6/25/99   N310NW      15,925,810.09         437435          12/1/99
 6/25/99   N311NW      15,841,636.77         437438          1/14/00
 6/25/99   N312NW      15,841,636.77         437456          1/14/00
 6/25/99   N313NW      15,857,802.76         437467           2/1/00
 6/25/99   N314NW       6,857,802.76         437474          2/15/00
<PAGE>

                                                 [Deposit Agreement (Class A)]

                                    EXHIBIT A

                          NOTICE OF PURCHASE WITHDRAWAL


ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL  60674-9135
Attention:   Claudia Heldring
Telecopier:  312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention:   Money Markets Desk
Telecopier:  312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class A) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO BANK N.V., Chicago Branch, as
Depositary (the "Depositary").

      In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. ________.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposit to _________________, Account No. __________, Reference: ___________ on
__________,____, upon the telephonic request of a representative of the Pass
Through Trustee.

                                   FIRST SECURITY BANK, NATIONAL
                                   ASSOCIATION,
                                   as Escrow Agent

                                   By: ____________________________________
                                     Name: ________________________________
                                     Title: _______________________________

Dated: _______________, _____
<PAGE>

                                                 [Deposit Agreement (Class A)]

                                    EXHIBIT B

                           NOTICE OF FINAL WITHDRAWAL

ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL  60674-9135
Attention:   Claudia Heldring
Telecopier:  312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention:   Money Markets Desk
Telecopier:  312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class A) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABM AMRO BANK, N.V., Chicago Branch (the
"Depositary").

      In accordance with Section 2.3(b) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of all Deposits.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposits and accrued interest thereon to the Paying Agent at [NAME], ABA
#___________, Account #_________, Attention: ___________________, Reference:
[Northwest Airlines 1999-2 EETC].

                                   FIRST SECURITY BANK, NATIONAL
                                   ASSOCIATION,
                                   as Escrow Agent

                                   By: ____________________________________
                                     Name: ________________________________
                                     Title: _______________________________

Dated: _______________, _____



- --------------------------------------------------------------------------------

                                DEPOSIT AGREEMENT
                                    (Class B)

                            Dated as of June 25, 1999

                                     between

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                                as Escrow Agent,

                                       and

                       ABN AMRO BANK N.V., CHICAGO BRANCH,
                                  as Depositary

- --------------------------------------------------------------------------------
<PAGE>

                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

                                    ARTICLE 1

FORMATION OF DEPOSITS..........................................................2
            Section 1.1   Acceptance of Depositary.............................2
            Section 1.2   Establishment of Accounts............................2

                                    ARTICLE 2

MAINTENANCE OF DEPOSITS........................................................2
            Section 2.1   Deposits.............................................2
            Section 2.2   Interest.............................................3
            Section 2.3   Withdrawals..........................................3
            Section 2.4   Other Accounts.......................................4

                                    ARTICLE 3

TERMINATION....................................................................4

                                    ARTICLE 4

PAYMENTS.......................................................................4

                                    ARTICLE 5

REPRESENTATIONS AND WARRANTIES.................................................5

                                    ARTICLE 6

TRANSFER.......................................................................6

                                    ARTICLE 7

AMENDMENT......................................................................6

                                    ARTICLE 8

NOTICES........................................................................7
<PAGE>

                                    ARTICLE 9

OBLIGATIONS UNCONDITIONAL......................................................7

                                   ARTICLE 10

ENTIRE AGREEMENT...............................................................7

                                   ARTICLE 11

GOVERNING LAW..................................................................8

                                   ARTICLE 12

WAIVER OF JURY TRIAL RIGHT.....................................................8

                                   ARTICLE 13

COUNTERPARTS...................................................................8

Schedule I   Schedule of Deposits

Exhibit A    Notice of Purchase Withdrawal

Exhibit B    Notice of Final Withdrawal


                                       ii
<PAGE>

      This DEPOSIT AGREEMENT (Class B) dated as of June 25, 1999 (as amended,
modified or supplemented from time to time, this "Agreement") between First
Security Bank, National Association, as Escrow Agent under the Escrow and Paying
Agent Agreement referred to below (in such capacity, together with its
successors in such capacity, the "Escrow Agent"), and ABN AMRO BANK N.V.,
Chicago Branch, as depositary bank (the "Depositary").

                               W I T N E S S E T H

      WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and State Street Bank and Trust Company of Connecticut, National Association,
not in its individual capacity except as otherwise expressly provided therein,
but solely as trustee (in such capacity, together with its successors in such
capacity, the "Pass Through Trustee") have entered into a Trust Supplement,
dated June 25, 1999, to the Pass Through Trust Agreement dated as of June 3,
1999, by and among the Guarantor, Northwest and the Pass Through Trustee (the
"Basic Agreement") relating to Northwest Airlines Pass Through Trust 1999-2B
pursuant to which the Northwest Airlines Pass Through Trust, Series 1999-2B
Certificates referred to therein (the "Certificates") are being issued;

      WHEREAS, Northwest and Salomon Smith Barney Inc., Credit Suisse First
Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
Inc., and Deutsche Bank Securities Inc. (collectively, the "Underwriters" and,
together with their respective transferees and assigns as registered owners of
the Certificates, the "Investors") have entered into an Underwriting Agreement
dated as of June 18, 1999 pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

      WHEREAS, Northwest, the Pass Through Trustee, certain other pass through
trustees and certain other persons concurrently herewith are entering into the
Note Purchase Agreement, dated as of the date hereof (the "Note Purchase
Agreement"), pursuant to which the Pass Through Trustee has agreed to acquire
from time to time on or prior to the Delivery Period Termination Date (as
defined in the Note Purchase Agreement) equipment notes (the "Equipment Notes")
issued to finance the acquisition of aircraft by Northwest, as lessee or as
owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

      WHEREAS, the Escrow Agent, the Underwriters, the Pass Through Trustee and
State Street Bank and Trust Company, as paying agent for the Escrow Agent (in
such capacity, together with its successors in such capacity, the "Paying
Agent") concurrently herewith are entering into an Escrow and Paying Agent
Agreement, dated as of the date hereof (as amended, modified or supplemented
from time to time in accordance with the terms thereof, the "Escrow and Paying
Agent Agreement"); and

      WHEREAS, the Underwriters and the Pass Through Trustee intend that the Net
Proceeds be held in escrow by the Escrow Agent pursuant to the Escrow and Paying
Agent Agreement, subject to withdrawal upon request of and proper certification
by the Pass Through Trustee for
<PAGE>

                                                   [Deposit Agreement (Class B)]

the purpose of purchasing Equipment Notes, and that pending
such withdrawal the Net Proceeds be deposited by the Escrow Agent with the
Depositary pursuant to this Agreement, which provides for the Depositary to pay
interest for distribution to the Investors and to establish accounts from which
the Escrow Agent shall make withdrawals upon request of and proper certification
by the Pass Through Trustee.

      NOW, THEREFORE, in consideration of the obligations contained herein, and
for other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties hereto hereby agree as follows:

                                    ARTICLE 1
                              FORMATION OF DEPOSITS

      Section 1.1 Acceptance of Depositary. The Depositary hereby agrees to act
as depositary bank as provided herein and in connection therewith to accept all
amounts to be delivered to or held by the Depositary pursuant to the terms of
this Agreement. The Depositary further agrees to hold, maintain and safeguard
the Deposits and the Accounts (as defined below) during the term of this
Agreement in accordance with the provisions of this Agreement. The Escrow Agent
shall not have any right to withdraw, assign or otherwise transfer moneys held
in the Accounts except as permitted by this Agreement.

      Section 1.2 Establishment of Accounts. The Escrow Agent hereby instructs
the Depositary, and the Depositary agrees, to establish the separate deposit
accounts listed on Schedule I hereto and to establish such additional separate
deposit accounts as may be required in connection with the deposits contemplated
by Section 2.4 hereof (each, an "Account" and collectively, the "Accounts"),
each in the name of the Escrow Agent and all on the terms and conditions set
forth in this Agreement.

                                    ARTICLE 2
                             MAINTENANCE OF DEPOSITS

      Section 2.1 Deposits. The Escrow Agent shall direct the Underwriters to
deposit with the Depositary on the date of this Agreement (the "Deposit Date")
in Federal (same day) funds by wire transfer to: Federal Reserve Bank, New York,
ABN NY ABA #02009580, Account: Chicago Treasury, Reference: Northwest Airlines
1999-2 EETC, and the Depositary shall accept from the Underwriters, on behalf of
the Escrow Agent, the sum of US$109,858,000. Upon acceptance of such sum, the
Depositary shall (i) establish each of the deposits specified in Schedule I
hereto maturing on the respective dates (each such date, as it may be extended
from time to time in accordance with the Indemnity Agreement through the
Delivery Period Termination Date, a "Maturity Date") set forth therein
(including any deposit made pursuant to


                                       2
<PAGE>

                                                   [Deposit Agreement (Class B)]

Section 2.4 hereof, individually, a "Deposit" and, collectively, the "Deposits")
and (ii) credit each Deposit to the related Account as set forth therein. No
amount shall be deposited in any Account other than the related Deposit.

      Section 2.2 Interest. Each Deposit shall bear interest from and including
the date of deposit to but excluding the earlier of (x) date of withdrawal and
(y) such Deposit's Maturity Date at the rate of 7.950% per annum (computed on
the basis of a year of twelve 30-day months) payable to the Paying Agent on
behalf of the Escrow Agent semiannually in arrears on each March 1 and September
1, commencing on March 1, 2000 (each, an "Interest Payment Date"), and on the
date of the Final Withdrawal (as defined below), all in accordance with the
terms of this Agreement (whether or not any such Deposit is withdrawn on an
Interest Payment Date). Interest accrued on any Deposit that is withdrawn
pursuant to a Notice of Purchase Withdrawal (as defined below) shall be paid on
the next Interest Payment Date, notwithstanding any intervening Final Withdrawal
(such remaining interest being hereinafter referred to as a "Carryover
Deposit").

      Section 2.3 Withdrawals. On and after the date four (4) days after the
establishment of the Designated Deposits (such "Designated Deposits" being the
three (3) deposits that the Escrow Agent designates in writing on the Deposit
Date to be withdrawn prior to the expiration of seven (7) days after such
establishment) and each New Deposit, the Escrow Agent may, by providing at least
one (1) Business Day's prior notice of withdrawal to the Depositary in the form
of Exhibit A hereto (a "Notice of Purchase Withdrawal"), withdraw not less than
the entire balance of such Deposits. On and after the date seven (7) days after
the establishment of each Deposit other than a Designated Deposit, the Escrow
Agent may, by providing at least one (1) Business Day's prior Notice of Purchase
Withdrawal, withdraw not less than the entire balance of such Deposit. At any
time prior to the actual withdrawal of any such Deposit, the Escrow Agent or the
Pass Through Trustee may, by notice to the Depositary, cancel such withdrawal
(including on the scheduled date therefor), and thereafter such Deposit shall
continue to be maintained by the Depositary in accordance with the original
terms thereof. Following such withdrawal the balance in the related Account
shall be zero and the Depositary shall close such Account. As used herein,
"Business Day" means any day, other than a Saturday, Sunday or other day on
which commercial banks are authorized or required by law to close in New York,
New York, Minneapolis, Minnesota, Boston, Massachusetts, Hartford, Connecticut,
Salt Lake City, Utah or Chicago, Illinois.

            (a) The Escrow Agent may, by providing at least fifteen (15) days'
prior notice of withdrawal to the Depositary in the form of Exhibit B hereto (a
"Notice of Final Withdrawal"), withdraw the entire amount of all of the
remaining Deposits together with the payment by the Depositary of all accrued
and unpaid interest on such Deposits to but excluding the specified date of
withdrawal (a "Final Withdrawal"), on such date as shall be specified in such
Notice of Final Withdrawal. If a Notice of Final Withdrawal has not been given
to the Depositary on or before June 1, 2000, and there are unwithdrawn Deposits
on such date, the Depositary shall pay


                                       3
<PAGE>

                                                   [Deposit Agreement (Class B)]

the amount of the Final Withdrawal to the Paying Agent on such date as
designated by Northwest pursuant to the Indemnity Agreement dated as of June 25,
1999 between Northwest and the Depositary but in any event not later than June
16, 2000.

            (b) If the Depositary receives a duly completed Notice of Purchase
Withdrawal or Notice of Final Withdrawal complying with the provisions of this
Agreement, it shall make the payments specified therein in accordance with the
provisions of this Agreement.

      Section 2.4 Other Accounts. On the date of withdrawal of any Deposit, the
Escrow Agent, or the Pass Through Trustee on behalf of the Escrow Agent, shall
be entitled to re-deposit with the Depositary any portion thereof and the
Depositary shall accept the same for deposit hereunder. Any sums so received for
deposit shall be established as a new Deposit and credited to a new Account, all
as more fully provided in Section 2.1 hereof, and thereafter the provisions of
this Agreement shall apply thereto as fully and with the same force and effect
as if such Deposit had been established on the Deposit Date except that (i) such
Deposit may not be withdrawn prior to the date seven days after the
establishment thereof and (ii) such Deposit shall mature on June 16, 2000 and
bear interest as provided in Section 2.2. The Depositary shall promptly give
notice to the Escrow Agent of receipt of each such re-deposit and the account
number assigned thereto.

                                    ARTICLE 3
                                   TERMINATION

      This Agreement shall terminate on the fifth (5th) Business Day after the
later of the date on which (i) all of the Deposits shall have been withdrawn and
paid as provided herein without any re-deposit and (ii) all accrued and unpaid
interest on the Deposits shall have been paid as provided herein, but in no
event prior to the date on which the Depositary shall have performed in full its
obligations hereunder.

                                    ARTICLE 4
                                    PAYMENTS

      All payments (including, without limitation, those Payments made in
respect of Taxes (as defined and provided for below)) made by the Depositary
hereunder shall be paid in United States Dollars and immediately available funds
by wire transfer (i) in the case of accrued interest on the Deposits payable
under Section 2.2 hereof or any Final Withdrawal, directly to the Paying Agent
on behalf of the Escrow Agent at State Street Bank and Trust Company, Two
International Place, Boston, Massachusetts 02110, Attention: Corporate Trust
Department, Reference: Northwest Airlines 1999-2 EETC, or to such other account
as the Paying Agent may direct from time to time in writing to the Depositary
and the Escrow Agent and (ii) in the case of any withdrawal of one or more
Deposits pursuant to a Notice of Purchase Withdrawal, directly to or as directed
by the Pass


                                       4
<PAGE>

                                                   [Deposit Agreement (Class B)]

Through Trustee as specified and in the manner provided in such Notice of
Purchase Withdrawal. The Depositary hereby waives any and all rights of set-off,
combination of accounts, right of retention or similar right (whether arising
under applicable law, contract or otherwise) it may have against the Deposits
howsoever arising. Except as provided below, all payments on or in respect of
each Deposit shall be made free and clear of and without reduction for or on
account of any and all taxes, levies or other impositions or charges
(collectively, "Taxes"). However, if the Depositary or the Paying Agent
(pursuant to Section 2.4 of the Escrow and Paying Agent Agreement) shall be
required by law to deduct or withhold any Taxes from or in respect of any sum
payable hereunder, the Depositary shall: (i) make such deductions or
withholding; (ii) pay the full amount deducted or withheld (including in respect
of such additional amounts) to the competent taxation authority; and (iii) if
the Taxes required to be deducted or withheld are imposed by the Netherlands or
any political subdivision thereof, pay such additional amounts as may be
necessary in order that the actual amount received by the designated recipient
of such sum under this Agreement or the Escrow and Paying Agent Agreement after
such deduction or withholding equals the sum it would have received had no such
deduction or withholding been required. If the date on which any payment due on
any Deposit would otherwise fall on a day which is not a Business Day, such
payment shall be made on the next succeeding Business Day with the same force
and effect as if made on such scheduled date, and no additional interest shall
accrue in respect of such extension.

                                    ARTICLE 5
                         REPRESENTATIONS AND WARRANTIES

      The Depositary hereby represents and warrants to Northwest, the Guarantor,
the Escrow Agent, the Pass Through Trustee and the Paying Agent that:

            (a) it is a bank duly organized and validly existing in good
standing under the laws of its jurisdiction of organization and is duly
qualified to conduct banking business in the State of Illinois through its
Chicago branch;

            (b) it has full power, authority and legal right to conduct its
business and operations as currently conducted and to enter into and perform its
obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement have
been duly authorized by all necessary corporate action on the part of it and do
not require any stockholder approval, or approval or consent of any trustee or
holder of any indebtedness or obligations of it, and such document has been duly
executed and delivered by it and constitutes its legal, valid and binding
obligations enforceable against it in accordance with the terms hereof;


                                       5
<PAGE>

                                                   [Deposit Agreement (Class B)]

            (d) no authorization, consent or approval of, or other action by,
and no notice to or filing with, any United States federal or state governmental
authority or regulatory body is required for the execution, delivery or
performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
Agreement, nor compliance with the terms and provisions hereof, conflicts or
will conflict with or results or will result in, a breach or violation of any of
the terms, conditions or provisions of, or will require any consent or approval
under, any law, governmental rule or regulation or the charter documents, as
amended, or bylaws, as amended, of it or any similar instrument binding on it or
any order, writ, injunction or decree of any court or governmental authority
against it or by which it or any of its properties is bound or any indenture,
mortgage or contract or other agreement or instrument to which it is a party or
by which it or any of its properties is bound, or constitutes or will constitute
a default thereunder or results or will result in the imposition of any lien
upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
suits, investigations or proceedings (whether or not purportedly on behalf of
it) against or affecting it or any of its property before or by any court or
administrative agency which, if adversely determined, (i) would adversely affect
the ability of it to perform its obligations under this Agreement or (ii) would
call into question or challenge the validity of this Agreement or the
enforceability hereof in accordance with the terms hereof, nor is the Depositary
in default with respect to any order of any court, governmental authority,
arbitration board or administrative agency so as to adversely affect its ability
to perform its obligations under this Agreement.

                                    ARTICLE 6
                                    TRANSFER

      Neither party hereto shall be entitled to assign or otherwise transfer
this Agreement (or any interest herein) other than (in the case of the Escrow
Agent) to a successor escrow agent under Section 1.7 of the Escrow and Paying
Agent Agreement, and any purported assignment in violation thereof shall be
void. This Agreement shall be binding upon the parties hereto and their
respective successors and (in the case of the Escrow Agent) permitted assigns.

                                    ARTICLE 7
                                    AMENDMENT

      This Agreement may not be amended, waived or otherwise modified except by
an instrument in writing signed by the party against whom the amendment, waiver
or other modification is sought to be enforced and by the Pass Through Trustee.


                                       6
<PAGE>

                                                   [Deposit Agreement (Class B)]

                                    ARTICLE 8
                                     NOTICES

      Unless otherwise expressly provided herein, any notice or other
communication under this Agreement shall be in writing (including by facsimile)
and shall be deemed to be given and effective upon receipt thereof. All notices
shall be sent to (x) in the case of the Depositary, ABN AMRO BANK N.V., Chicago
Branch, 135 South LaSalle Street, Suite 660, Chicago, IL 60674-9135, Attention:
Claudia Heldring (Telecopier: 312-606-8428) and ABN AMRO BANK N.V., Chicago
Branch, 181 W. Madison Street, Chicago, IL 60602, Attention: Money Markets Desk
(Telecopier: 312-904-9107) or (y) in the case of the Escrow Agent, First
Security Bank, National Association 79 South Main Street, Salt Lake City, Utah
84111, Attention: Corporate-Trust Services (Telecopier: (801) 246-5053), in each
case, with a copy to the Pass Through Trustee, State Street Bank and Trust
Company of Connecticut, National Association, 225 Asylum Street, Goodwin Square,
Hartford, Connecticut 06103, Attention: Corporate/Muni Department, (Telecopier:
(860) 244-1889) and to Northwest, Northwest Airlines, Inc., Department A4010,
5101 Northwest Drive, St. Paul, MN 55111-3034, Attention: Treasurer (Telecopier:
(612) 726-0665) (or at such other address as any such party may specify from
time to time in a written notice to the parties hereto). On or prior to the
execution of this Agreement, the Escrow Agent has delivered to the Depositary a
certificate containing specimen signatures of the representatives of the Escrow
Agent who are authorized to give notices and instructions with respect to this
Agreement. The Depositary may conclusively rely on such certificate until the
Depositary receives written notice from the Escrow Agent to the contrary.

                                    ARTICLE 9
                            OBLIGATIONS UNCONDITIONAL

      The Depositary hereby acknowledges and agrees that its obligation to repay
each Deposit together with interest thereon as provided herein is absolute,
irrevocable and unconditional and constitutes a full recourse obligation of the
Depositary enforceable against it to the full extent of all of its assets and
properties.

                                   ARTICLE 10
                                ENTIRE AGREEMENT

      This Agreement (including all attachments hereto) sets forth all of the
promises, covenants, agreements, conditions and understandings between the
Depositary and the Escrow Agent with respect to the subject matter hereof and
supersedes all prior and contemporaneous agreements and undertakings,
inducements or conditions, express or implied, oral or written.


                                       7
<PAGE>

                                                   [Deposit Agreement (Class B)]

                                   ARTICLE 11
                                  GOVERNING LAW

      THIS AGREEMENT, AND THE RIGHTS AND OBLIGATIONS OF THE DEPOSITARY AND THE
ESCROW AGENT WITH RESPECT TO THE DEPOSITS, SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK AND SUBJECT TO THE
PROVISIONS OF REGULATION D OF THE BOARD OF GOVERNORS OF THE FEDERAL RESERVE
SYSTEM (OR ANY SUCCESSOR), AS THE SAME MAY BE MODIFIED AND SUPPLEMENTED AND IN
EFFECT FROM TIME TO TIME.

                                   ARTICLE 12
                           WAIVER OF JURY TRIAL RIGHT

      EACH OF THE DEPOSITARY AND THE ESCROW AGENT ACKNOWLEDGES AND ACCEPTS THAT
IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT
SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

                                   ARTICLE 13
                                  COUNTERPARTS

      This Agreement may be executed in one or more counterparts, all of which
taken together shall constitute one instrument.

                                    *   *   *


                                       8
<PAGE>

                                                   [Deposit Agreement (Class B)]

      IN WITNESS WHEREOF, the Escrow Agent and the Depositary have caused this
Deposit Agreement to be duly executed as of the day and year first above
written.

                                   FIRST SECURITY BANK, NATIONAL
                                   ASSOCIATION,
                                   as Escrow Agent

                                   By: /s/ Greg A. Hawley
                                       -----------------------------------------
                                       Name: Greg A. Hawley
                                       Title: Vice President


                                   ABN AMRO BANK N.V., CHICAGO BRANCH,
                                   as Depositary

                                   By: /s/ Claudia C. Heldring
                                       -----------------------------------------
                                       Name: Claudia C. Heldring
                                       Title: Vice President

                                   By: /s/ Carla S. Waggoner
                                       -----------------------------------------
                                       Name: Carla S. Waggoner
                                       Title: Assistant Vice President
<PAGE>

                                                                      Schedule I

                              SCHEDULE OF DEPOSITS

                                    (Class B)

                                                                  MATURITY
 DATE        TAIL NO.      DEPOSIT AMOUNT       ACCOUNT NO.         DATE
 ----        --------      --------------       -----------       --------

6/25/99       N364NW        5,630,414.38          437030           6/30/99
6/25/99       N365NW        5,630,414.38          437214           6/30/99
6/25/99       N366NW        5,625,274.84          437252           6/30/99
6/25/99       N367NW        6,768,759.80          437294           7/15/99
6/25/99       N368NW        6,787,708.25          437319           7/15/99
6/25/99       N369NW        6,806,025.05          437338           7/15/99
6/25/99       N370NW        6,115,403.30          437354           7/23/99
6/25/99       N301NW        5,465,709.42          437364           8/2/99
6/25/99       N302NW        5,465,709.42          437388           8/2/99
6/25/99       N303NW        5,465,709.42          437392           8/16/99
6/25/99       N304NW        5,234,379.38          437399           9/1/99
6/25/99       N305NW        5,234,379.38          437403           9/1/99
6/25/99       N306NW        5,234,379.38          437421           9/15/99
6/25/99       N307NW        5,331,151.49          437424           11/1/99
6/25/99       N308NW        5,331,151.49          437430           11/1/99
6/25/99       N309NW        5,331,151.49          437433          11/15/99
6/25/99       N310NW        5,329,521.57          437437           12/1/99
6/25/99       N311NW        5,547,232.72          437445           1/14/00
6/25/99       N312NW        5,547,232.72          437460           1/14/00
6/25/99       N313NW        1,976,292.12          437471           2/1/00
<PAGE>

                                                   [Deposit Agreement (Class B)]

                                    EXHIBIT A

                          NOTICE OF PURCHASE WITHDRAWAL

ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL 60674-9135
Attention:  Claudia Heldring
Telecopier: 312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention:  Money Markets Desk
Telecopier: 312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class B) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO BANK N.V., Chicago Branch, as
Depositary (the "Depositary").

      In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. ________.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposit to _________________, Account No. __________, Reference: ___________ on
__________,____, upon the telephonic request of a representative of the Pass
Through Trustee.

                                        FIRST SECURITY BANK, NATIONAL
                                        ASSOCIATION,
                                        as Escrow Agent

                                        By:
                                           -------------------------------------
                                           Name:
                                                 -------------------------------
                                           Title:
                                                  ------------------------------

Dated:___________________, ___
<PAGE>

                                                   [Deposit Agreement (Class B)]

                                    EXHIBIT B

                           NOTICE OF FINAL WITHDRAWAL

ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL 60674-9135
Attention:  Claudia Heldring
Telecopier: 312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention:  Money Markets Desk
Telecopier: 312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class B) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABM AMRO BANK, N.V., Chicago Branch (the
"Depositary").

      In accordance with Section 2.3(b) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of all Deposits.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposits and accrued interest thereon to the Paying Agent at [NAME], ABA
#___________, Account #_________, Attention: ___________________, Reference:
[Northwest Airlines 1999-2 EETC].

                                        FIRST SECURITY BANK, NATIONAL
                                        ASSOCIATION,
                                        as Escrow Agent

                                        By:
                                           -------------------------------------
                                           Name:
                                                 -------------------------------
                                           Title:
                                                  ------------------------------

Dated:___________________, ___



- --------------------------------------------------------------------------------

                                DEPOSIT AGREEMENT
                                    (Class C)

                            Dated as of June 25, 1999

                                     between

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                                as Escrow Agent,

                                       and

                       ABN AMRO BANK N.V., CHICAGO BRANCH,
                                  as Depositary

- --------------------------------------------------------------------------------
<PAGE>

                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

                                    ARTICLE 1

FORMATION OF DEPOSITS..........................................................2
            Section 1.1 Acceptance of Depositary...............................2
            Section 1.2 Establishment of Accounts..............................2

                                  ARTICLE 2

MAINTENANCE OF DEPOSITS........................................................2
            Section 2.1 Deposits...............................................2
            Section 2.2 Interest...............................................3
            Section 2.3 Withdrawals............................................3
            Section 2.4 Other Accounts.........................................4

                                    ARTICLE 3

TERMINATION....................................................................4

                                    ARTICLE 4

PAYMENTS.......................................................................4

                                    ARTICLE 5

REPRESENTATIONS AND WARRANTIES.................................................5

                                    ARTICLE 6

TRANSFER.......................................................................6

                                    ARTICLE 7

AMENDMENT......................................................................6

                                    ARTICLE 8

NOTICES........................................................................7
<PAGE>

                                    ARTICLE 9

OBLIGATIONS UNCONDITIONAL......................................................7

                                   ARTICLE 10

ENTIRE AGREEMENT...............................................................7

                                   ARTICLE 11

GOVERNING LAW..................................................................8

                                   ARTICLE 12

WAIVER OF JURY TRIAL RIGHT.....................................................8

                                   ARTICLE 13

COUNTERPARTS...................................................................8

Schedule I  Schedule of Deposits

Exhibit A   Notice of Purchase Withdrawal

Exhibit B   Notice of Final Withdrawal


                                      ii
<PAGE>

      This DEPOSIT AGREEMENT (Class C) dated as of June 25, 1999 (as amended,
modified or supplemented from time to time, this "Agreement") between First
Security Bank, National Association, as Escrow Agent under the Escrow and Paying
Agent Agreement referred to below (in such capacity, together with its
successors in such capacity, the "Escrow Agent"), and ABN AMRO BANK N.V.,
Chicago Branch, as depositary bank (the "Depositary").

                               W I T N E S S E T H

      WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and State Street Bank and Trust Company of Connecticut, National Association,
not in its individual capacity except as otherwise expressly provided therein,
but solely as trustee (in such capacity, together with its successors in such
capacity, the "Pass Through Trustee") have entered into a Trust Supplement,
dated June 25, 1999, to the Pass Through Trust Agreement dated as of June 3,
1999, by and among the Guarantor, Northwest and the Pass Through Trustee (the
"Basic Agreement") relating to Northwest Airlines Pass Through Trust 1999-2C
pursuant to which the Northwest Airlines Pass Through Trust, Series 1999-2C
Certificates referred to therein (the "Certificates") are being issued;

      WHEREAS, Northwest and Salomon Smith Barney Inc., Credit Suisse First
Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA)
Inc.. and Deutsche Bank Securities Inc. (collectively, the "Underwriters" and,
together with their respective transferees and assigns as registered owners of
the Certificates, the "Investors") have entered into an Underwriting Agreement
dated as of June 18, 1999 pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

      WHEREAS, Northwest, the Pass Through Trustee, certain other pass through
trustees and certain other persons concurrently herewith are entering into the
Note Purchase Agreement, dated as of the date hereof (the "Note Purchase
Agreement"), pursuant to which the Pass Through Trustee has agreed to acquire
from time to time on or prior to the Delivery Period Termination Date (as
defined in the Note Purchase Agreement) equipment notes (the "Equipment Notes")
issued to finance the acquisition of aircraft by Northwest, as lessee or as
owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

      WHEREAS, the Escrow Agent, the Underwriters, the Pass Through Trustee and
State Street Bank and Trust Company, as paying agent for the Escrow Agent (in
such capacity, together with its successors in such capacity, the "Paying
Agent") concurrently herewith are entering into an Escrow and Paying Agent
Agreement, dated as of the date hereof (as amended, modified or supplemented
from time to time in accordance with the terms thereof, the "Escrow and Paying
Agent Agreement"); and

      WHEREAS, the Underwriters and the Pass Through Trustee intend that the Net
Proceeds be held in escrow by the Escrow Agent pursuant to the Escrow and Paying
Agent Agreement, subject to withdrawal upon request of and proper certification
by the Pass Through Trustee for
<PAGE>

                                                   [Deposit Agreement (Class C)]

the purpose of purchasing Equipment Notes, and that pending such withdrawal the
Net Proceeds be deposited by the Escrow Agent with the Depositary pursuant to
this Agreement, which provides for the Depositary to pay interest for
distribution to the Investors and to establish accounts from which the Escrow
Agent shall make withdrawals upon request of and proper certification by the
Pass Through Trustee.

      NOW, THEREFORE, in consideration of the obligations contained herein, and
for other good and valuable consideration, the receipt and sufficiency of which
is hereby acknowledged, the parties hereto hereby agree as follows:

                                    ARTICLE 1
                              FORMATION OF DEPOSITS

      Section 1.1 Acceptance of Depositary. The Depositary hereby agrees to act
as depositary bank as provided herein and in connection therewith to accept all
amounts to be delivered to or held by the Depositary pursuant to the terms of
this Agreement. The Depositary further agrees to hold, maintain and safeguard
the Deposits and the Accounts (as defined below) during the term of this
Agreement in accordance with the provisions of this Agreement. The Escrow Agent
shall not have any right to withdraw, assign or otherwise transfer moneys held
in the Accounts except as permitted by this Agreement.

      Section 1.2 Establishment of Accounts. The Escrow Agent hereby instructs
the Depositary, and the Depositary agrees, to establish the separate deposit
accounts listed on Schedule I hereto and to establish such additional separate
deposit accounts as may be required in connection with the deposits contemplated
by Section 2.4 hereof (each, an "Account" and collectively, the "Accounts"),
each in the name of the Escrow Agent and all on the terms and conditions set
forth in this Agreement.

                                    ARTICLE 2
                             MAINTENANCE OF DEPOSITS

      Section 2.1 Deposits. The Escrow Agent shall direct the Underwriters to
deposit with the Depositary on the date of this Agreement (the "Deposit Date")
in Federal (same day) funds by wire transfer to: Federal Reserve Bank, New York,
ABN NY ABA #02009580, Account: Chicago Treasury, Reference: Northwest Airlines
1999-2 EETC, and the Depositary shall accept from the Underwriters, on behalf of
the Escrow Agent, the sum of US$102,122,000. Upon acceptance of such sum, the
Depositary shall (i) establish each of the deposits specified in Schedule I
hereto maturing on the respective dates (each such date, as it may be extended
from time to time in accordance with the Indemnity Agreement through the
Delivery Period Termination Date, a "Maturity Date") set forth therein
(including any deposit made pursuant to Section 2.4 hereof, individually, a
"Deposit" and, collectively, the "Deposits") and (ii) credit each


                                       2
<PAGE>

                                                   [Deposit Agreement (Class C)]

Deposit to the related Account as set forth therein. No amount shall be
deposited in any Account other than the related Deposit.

      Section 2.2 Interest. Each Deposit shall bear interest from and including
the date of deposit to but excluding the earlier of (x) date of withdrawal and
(y) such Deposit's Maturity Date at the rate of 8.304% per annum (computed on
the basis of a year of twelve 30-day months) payable to the Paying Agent on
behalf of the Escrow Agent semiannually in arrears on each March 1 and September
1, commencing on March 1, 2000 (each, an "Interest Payment Date"), and on the
date of the Final Withdrawal (as defined below), all in accordance with the
terms of this Agreement (whether or not any such Deposit is withdrawn on an
Interest Payment Date). Interest accrued on any Deposit that is withdrawn
pursuant to a Notice of Purchase Withdrawal (as defined below) shall be paid on
the next Interest Payment Date, notwithstanding any intervening Final Withdrawal
(such remaining interest being hereinafter referred to as a "Carryover
Deposit").

      Section 2.3 Withdrawals. On and after the date four (4) days after the
establishment of the Designated Deposits (such "Designated Deposits" being the
three (3) deposits that the Escrow Agent designates in writing on the Deposit
Date to be withdrawn prior to the expiration of seven (7) days after such
establishment) and each New Deposit, the Escrow Agent may, by providing at least
one (1) Business Day's prior notice of withdrawal to the Depositary in the form
of Exhibit A hereto (a "Notice of Purchase Withdrawal"), withdraw not less than
the entire balance of such Deposits. On and after the date seven (7) days after
the establishment of each Deposit other than a Designated Deposit, the Escrow
Agent may, by providing at least one (1) Business Day's prior Notice of Purchase
Withdrawal, withdraw not less than the entire balance of such Deposit. At any
time prior to the actual withdrawal of any such Deposit, the Escrow Agent or the
Pass Through Trustee may, by notice to the Depositary, cancel such withdrawal
(including on the scheduled date therefor), and thereafter such Deposit shall
continue to be maintained by the Depositary in accordance with the original
terms thereof. Following such withdrawal the balance in the related Account
shall be zero and the Depositary shall close such Account. As used herein,
"Business Day" means any day, other than a Saturday, Sunday or other day on
which commercial banks are authorized or required by law to close in New York,
New York, Minneapolis, Minnesota, Boston, Massachusetts, Hartford, Connecticut,
Salt Lake City, Utah or Chicago, Illinois.

            (a) The Escrow Agent may, by providing at least fifteen (15) days'
prior notice of withdrawal to the Depositary in the form of Exhibit B hereto (a
"Notice of Final Withdrawal"), withdraw the entire amount of all of the
remaining Deposits together with the payment by the Depositary of all accrued
and unpaid interest on such Deposits to but excluding the specified date of
withdrawal (a "Final Withdrawal"), on such date as shall be specified in such
Notice of Final Withdrawal. If a Notice of Final Withdrawal has not been given
to the Depositary on or before June 1, 2000 and there are unwithdrawn Deposits
on such date, the Depositary shall pay the amount of the Final Withdrawal to the
Paying Agent on such date as designated by Northwest


                                       3
<PAGE>

                                                   [Deposit Agreement (Class C)]

pursuant to the Indemnity Agreement dated as of June 25, 1999 between Northwest
and the Depositary but in any event not later than June 16, 2000.

            (b) If the Depositary receives a duly completed Notice of Purchase
Withdrawal or Notice of Final Withdrawal complying with the provisions of this
Agreement, it shall make the payments specified therein in accordance with the
provisions of this Agreement.

      Section 2.4 Other Accounts. On the date of withdrawal of any Deposit, the
Escrow Agent, or the Pass Through Trustee on behalf of the Escrow Agent, shall
be entitled to re-deposit with the Depositary any portion thereof and the
Depositary shall accept the same for deposit hereunder. Any sums so received for
deposit shall be established as a new Deposit and credited to a new Account, all
as more fully provided in Section 2.1 hereof, and thereafter the provisions of
this Agreement shall apply thereto as fully and with the same force and effect
as if such Deposit had been established on the Deposit Date except that (i) such
Deposit may not be withdrawn prior to the date seven days after the
establishment thereof and (ii) such Deposit shall mature on June 1, 2000 and
bear interest as provided in Section 2.2. The Depositary shall promptly give
notice to the Escrow Agent of receipt of each such re-deposit and the account
number assigned thereto.

                                    ARTICLE 3
                                   TERMINATION

      This Agreement shall terminate on the fifth (5th) Business Day after the
later of the date on which (i) all of the Deposits shall have been withdrawn and
paid as provided herein without any re-deposit and (ii) all accrued and unpaid
interest on the Deposits shall have been paid as provided herein, but in no
event prior to the date on which the Depositary shall have performed in full its
obligations hereunder.

                                    ARTICLE 4
                                    PAYMENTS

      All payments (including, without limitation, those Payments made in
respect of Taxes (as defined and provided for below)) made by the Depositary
hereunder shall be paid in United States Dollars and immediately available funds
by wire transfer (i) in the case of accrued interest on the Deposits payable
under Section 2.2 hereof or any Final Withdrawal, directly to the Paying Agent
on behalf of the Escrow Agent at State Street Bank and Trust Company, Two
International Place, Boston, Massachusetts 02110, Attention: Corporate Trust
Department, Reference: Northwest Airlines 1999-2 EETC, or to such other account
as the Paying Agent may direct from time to time in writing to the Depositary
and the Escrow Agent and (ii) in the case of any withdrawal of one or more
Deposits pursuant to a Notice of Purchase Withdrawal, directly to or as directed
by the Pass Through Trustee as specified and in the manner provided in such
Notice of Purchase Withdrawal.


                                       4
<PAGE>

                                                   [Deposit Agreement (Class C)]

The Depositary hereby waives any and all rights of set-off, combination of
accounts, right of retention or similar right (whether arising under applicable
law, contract or otherwise) it may have against the Deposits howsoever arising.
Except as provided below, all payments on or in respect of each Deposit shall be
made free and clear of and without reduction for or on account of any and all
taxes, levies or other impositions or charges (collectively, "Taxes"). However,
if the Depositary or the Paying Agent (pursuant to Section 2.4 of the Escrow and
Paying Agent Agreement) shall be required by law to deduct or withhold any Taxes
from or in respect of any sum payable hereunder, the Depositary shall: (i) make
such deductions or withholding; (ii) pay the full amount deducted or withheld
(including in respect of such additional amounts) to the competent taxation
authority; and (iii) if the Taxes required to be deducted or withheld are
imposed by the Netherlands or any political subdivision thereof, pay such
additional amounts as may be necessary in order that the actual amount received
by the designated recipient of such sum under this Agreement or the Escrow and
Paying Agent Agreement after such deduction or withholding equals the sum it
would have received had no such deduction or withholding been required. If the
date on which any payment due on any Deposit would otherwise fall on a day which
is not a Business Day, such payment shall be made on the next succeeding
Business Day with the same force and effect as if made on such scheduled date,
and no additional interest shall accrue in respect of such extension.

                                    ARTICLE 5
                         REPRESENTATIONS AND WARRANTIES

      The Depositary hereby represents and warrants to Northwest, the Guarantor,
the Escrow Agent, the Pass Through Trustee and the Paying Agent that:

            (a) it is a bank duly organized and validly existing in good
standing under the laws of its jurisdiction of organization and is duly
qualified to conduct banking business in the State of Illinois through its
Chicago branch;

            (b) it has full power, authority and legal right to conduct its
business and operations as currently conducted and to enter into and perform its
obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement have
been duly authorized by all necessary corporate action on the part of it and do
not require any stockholder approval, or approval or consent of any trustee or
holder of any indebtedness or obligations of it, and such document has been duly
executed and delivered by it and constitutes its legal, valid and binding
obligations enforceable against it in accordance with the terms hereof;


                                       5
<PAGE>

                                                   [Deposit Agreement (Class C)]

            (d) no authorization, consent or approval of, or other action by,
and no notice to or filing with, any United States federal or state governmental
authority or regulatory body is required for the execution, delivery or
performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
Agreement, nor compliance with the terms and provisions hereof, conflicts or
will conflict with or results or will result in, a breach or violation of any of
the terms, conditions or provisions of, or will require any consent or approval
under, any law, governmental rule or regulation or the charter documents, as
amended, or bylaws, as amended, of it or any similar instrument binding on it or
any order, writ, injunction or decree of any court or governmental authority
against it or by which it or any of its properties is bound or any indenture,
mortgage or contract or other agreement or instrument to which it is a party or
by which it or any of its properties is bound, or constitutes or will constitute
a default thereunder or results or will result in the imposition of any lien
upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
suits, investigations or proceedings (whether or not purportedly on behalf of
it) against or affecting it or any of its property before or by any court or
administrative agency which, if adversely determined, (i) would adversely affect
the ability of it to perform its obligations under this Agreement or (ii) would
call into question or challenge the validity of this Agreement or the
enforceability hereof in accordance with the terms hereof, nor is the Depositary
in default with respect to any order of any court, governmental authority,
arbitration board or administrative agency so as to adversely affect its ability
to perform its obligations under this Agreement.

                                    ARTICLE 6
                                    TRANSFER

      Neither party hereto shall be entitled to assign or otherwise transfer
this Agreement (or any interest herein) other than (in the case of the Escrow
Agent) to a successor escrow agent under Section 1.7 of the Escrow and Paying
Agent Agreement, and any purported assignment in violation thereof shall be
void. This Agreement shall be binding upon the parties hereto and their
respective successors and (in the case of the Escrow Agent) permitted assigns.

                                    ARTICLE 7
                                    AMENDMENT

      This Agreement may not be amended, waived or otherwise modified except by
an instrument in writing signed by the party against whom the amendment, waiver
or other modification is sought to be enforced and by the Pass Through Trustee.


                                       6
<PAGE>

                                                   [Deposit Agreement (Class C)]

                                    ARTICLE 8
                                     NOTICES

      Unless otherwise expressly provided herein, any notice or other
communication under this Agreement shall be in writing (including by facsimile)
and shall be deemed to be given and effective upon receipt thereof. All notices
shall be sent to (x) in the case of the Depositary, ABN AMRO BANK N.V., Chicago
Branch, 135 South LaSalle Street, Suite 660, Chicago, IL 60674- 9135, Attention:
Claudia Heldring (Telecopier: 312-606-8428) and ABN AMRO BANK N.V., Chicago
Branch, 181 W. Madison Street, Chicago, IL 60602, Attention: Money Markets Desk
(Telecopier: 312-904-9107) or (y) in the case of the Escrow Agent, First
Security Bank, National Association 79 South Main Street, Salt Lake City, Utah
84111, Attention: Corporate-Trust Services (Telecopier: (801) 246-5053), in each
case, with a copy to the Pass Through Trustee, State Street Bank and Trust
Company of Connecticut, National Association, 225 Asylum Street, Goodwin Square,
Hartford, Connecticut 06103, Attention: Corporate/Muni Department, (Telecopier:
(860) 244-1889) and to Northwest, Northwest Airlines, Inc., Department A4010,
5101 Northwest Drive, St. Paul, MN 55111-3034, Attention: Treasurer (Telecopier:
(612) 726-0665) (or at such other address as any such party may specify from
time to time in a written notice to the parties hereto). On or prior to the
execution of this Agreement, the Escrow Agent has delivered to the Depositary a
certificate containing specimen signatures of the representatives of the Escrow
Agent who are authorized to give notices and instructions with respect to this
Agreement. The Depositary may conclusively rely on such certificate until the
Depositary receives written notice from the Escrow Agent to the contrary.

                                    ARTICLE 9
                            OBLIGATIONS UNCONDITIONAL

      The Depositary hereby acknowledges and agrees that its obligation to repay
each Deposit together with interest thereon as provided herein is absolute,
irrevocable and unconditional and constitutes a full recourse obligation of the
Depositary enforceable against it to the full extent of all of its assets and
properties.

                                   ARTICLE 10
                                ENTIRE AGREEMENT

      This Agreement (including all attachments hereto) sets forth all of the
promises, covenants, agreements, conditions and understandings between the
Depositary and the Escrow


                                       7
<PAGE>

                                                   [Deposit Agreement (Class C)]

Agent with respect to the subject matter hereof and supersedes all prior and
contemporaneous agreements and undertakings, inducements or conditions, express
or implied, oral or written.

                                   ARTICLE 11
                                  GOVERNING LAW

      THIS AGREEMENT, AND THE RIGHTS AND OBLIGATIONS OF THE DEPOSITARY AND THE
ESCROW AGENT WITH RESPECT TO THE DEPOSITS, SHALL BE GOVERNED BY, AND CONSTRUED
IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK AND SUBJECT TO THE
PROVISIONS OF REGULATION D OF THE BOARD OF GOVERNORS OF THE FEDERAL RESERVE
SYSTEM (OR ANY SUCCESSOR), AS THE SAME MAY BE MODIFIED AND SUPPLEMENTED AND IN
EFFECT FROM TIME TO TIME.

                                   ARTICLE 12
                           WAIVER OF JURY TRIAL RIGHT

      EACH OF THE DEPOSITARY AND THE ESCROW AGENT ACKNOWLEDGES AND ACCEPTS THAT
IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT
SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

                                   ARTICLE 13
                                  COUNTERPARTS

      This Agreement may be executed in one or more counterparts, all of which
taken together shall constitute one instrument.

                                    *   *   *


                                       8
<PAGE>

                                                   [Deposit Agreement (Class C)]

      IN WITNESS WHEREOF, the Escrow Agent and the Depositary have caused this
Deposit Agreement to be duly executed as of the day and year first above
written.


                                        FIRST SECURITY BANK, NATIONAL
                                        ASSOCIATION,
                                        as Escrow Agent


                                        By:_____________________________________
                                           Name:
                                           Title:


                                        ABN AMRO BANK N.V., CHICAGO BRANCH,
                                        as Depositary


                                        By:_____________________________________
                                           Name:
                                           Title:


                                        By:_____________________________________
                                           Name:
                                           Title:
<PAGE>

                                                                      Schedule I

                              SCHEDULE OF DEPOSITS

                                    (Class C)

                                                                        MATURITY
 DATE          TAIL NO.        DEPOSIT AMOUNT        ACCOUNT NO.          DATE
 ----          --------        --------------        -----------        --------

6/25/99         N364NW          5,863,531.24            437189          6/30/99
6/25/99         N365NW          5,863,531.24            437227          6/30/99
6/25/99         N366NW          5,824,681.45            437260          6/30/99
6/25/99         N367NW          5,824,960.80            437295          7/15/99
6/25/99         N368NW          5,749,167.00            437322          7/15/99
6/25/99         N369NW          5,675,899.80            437343          7/15/99
6/25/99         N370NW          6,208,228.47            437357          7/23/99
6/25/99         N301NW          4,840,892.63            437369          8/02/99
6/25/99         N302NW          4,840,892.63            437390          8/02/99
6/25/99         N303NW          4,840,892.63            437396          8/16/99
6/25/99         N304NW          4,978,061.26            437401           9/1/99
6/25/99         N305NW          4,978,061.26            437417           9/1/99
6/25/99         N306NW          4,978,061.26            437422          9/15/99
6/25/99         N307NW          4,520,194.85            437428          11/1/99
6/25/99         N308NW          4,520,194.85            437431          11/1/99
6/25/99         N309NW          4,520,194.85            437434         11/15/99
6/25/99         N310NW          4,915,673.74            437422          12/1/99
6/25/99         N311NW          5,616,162.07            437450          1/14/00
6/25/99         N312NW          5,616,162.07            437466          1/14/00
6/25/99         N313NW          1,946,555.90            437472           2/1/00
<PAGE>

                                                   [Deposit Agreement (Class C)]

                                    EXHIBIT A

                          NOTICE OF PURCHASE WITHDRAWAL

ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL 60674-9135
Attention: Claudia Heldring
Telecopier: 312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention: Money Markets Desk
Telecopier: 312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class C) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO BANK N.V., Chicago Branch, as
Depositary (the "Depositary").

      In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. ________.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposit to _________________, Account No. __________, Reference: ___________ on
__________,____, upon the telephonic request of a representative of the Pass
Through Trustee.

                                        FIRST SECURITY BANK, NATIONAL
                                        ASSOCIATION,
                                        as Escrow Agent

                                        By:_____________________________________
                                           Name:________________________________
                                           Title:_______________________________
Dated: ____________, ____
<PAGE>

                                                   [Deposit Agreement (Class C)]

                                    EXHIBIT B

                           NOTICE OF FINAL WITHDRAWAL

ABN AMRO BANK N.V., Chicago Branch
135 South LaSalle Street, Suite 611
Chicago, IL 60674-9135
Attention: Claudia Heldring
Telecopier: 312-606-8428

ABN AMRO BANK N.V., Chicago Branch
181 W. Madison Street
Chicago, IL 60602
Attention: Money Markets Desk
Telecopier: 312-904-9106

Ladies and Gentlemen:

      Reference is made to the Deposit Agreement (Class C) dated as of June 25,
1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABM AMRO BANK, N.V., Chicago Branch (the
"Depositary").

      In accordance with Section 2.3(b) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of all Deposits.

      The undersigned hereby directs the Depositary to pay the proceeds of the
Deposits and accrued interest thereon to the Paying Agent at [NAME], ABA
#___________, Account #_________, Attention: ___________________, Reference:
[Northwest Airlines 1999-2 EETC].

                                        FIRST SECURITY BANK, NATIONAL
                                          ASSOCIATION,
                                        as Escrow Agent

                                        By:_____________________________________
                                           Name:________________________________
                                           Title:_______________________________
Dated: ____________, ____




                                                                 EXHIBIT 4(f)(1)

                                                                  EXECUTION COPY

                        ESCROW AND PAYING AGENT AGREEMENT
                                    (Class A)

                            Dated as of June 25, 1999

                                      among

                    FIRST SECURITY BANK, NATIONAL ASSOCIATION

                                as Escrow Agent,

                            SALOMON SMITH BARNEY INC.

                     CREDIT SUISSE FIRST BOSTON CORPORATION

                              ABN AMRO INCORPORATED

                      CREDIT LYONNAIS SECURITIES (USA) INC.

                                       AND

                          DEUTSCHE BANK SECURITIES INC.
                                as Underwriters,

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,
                         not in its individual capacity,
                       but solely as Pass Through Trustee
                              for and on behalf of
                  Northwest Airlines Pass Through Trust 1999-2A
                            as Pass Through Trustee,

                                       AND

                      STATE STREET BANK AND TRUST COMPANY,

                                 as Paying Agent


<PAGE>

                               TABLE OF CONTENTS

                                                                          Page
                                                                          ----

SECTION 1.  Escrow Agent.....................................................2
      Section 1.1  Appointment of Escrow Agent...............................2
      Section 1.2  Instruction, Etc..........................................3
      Section 1.3  Initial Escrow Amount; Issuance of Escrow Receipts........3
      Section 1.4  Payments to Receiptholders................................4
      Section 1.5  Mutilated, Destroyed, Lost or Stolen Escrow Receipt.......4
      Section 1.6  Additional Escrow Amounts.................................5
      Section 1.7  Resignation or Removal of Escrow Agent....................5
      Section 1.8  Persons Deemed Owners.....................................5
      Section 1.9  Further Assurances........................................5

SECTION 2.  Paying Agent.....................................................6
      Section 2.1  Appointment of Paying Agent...............................6
      Section 2.2  Establishment of Paying Agent Account.....................6
      Section 2.3  Payments from Paying Agent Account........................6
      Section 2.4  Withholding Taxes.........................................7
      Section 2.5  Resignation or Removal of Paying Agent....................7
      Section 2.6  Notice of Final Withdrawal................................8

SECTION 3.  Payments.........................................................8

SECTION 4.  Other Actions....................................................8

SECTION 5.  Representations and Warranties of the Escrow Agent...............9

SECTION 6.  Representations and Warranties of the Paying Agent..............10

SECTION 7.  Indemnification.................................................11

SECTION 8.  Amendment, Etc..................................................11

SECTION 9.  Notices.........................................................11

SECTION 10.  Transfer.......................................................12

SECTION 11.  Entire Agreement...............................................12

SECTION 12.  Governing Law..................................................12

SECTION 13.  WAIVER OF JURY TRIAL RIGHT.....................................12

SECTION 14.  Counterparts...................................................12


                                       -i-
<PAGE>

EXHIBITS

Exhibit A     Escrow Receipt
Exhibit B     Withdrawal Certificate


                                     -ii-

<PAGE>

            This ESCROW AND PAYING AGENT AGREEMENT (Class A) dated as of June
25, 1999 (as amended, modified or supplemented from time to time, this
"Agreement") among First Security Bank, National Association, a national banking
association, as Escrow Agent (in such capacity, together with its successors in
such capacity, the "Escrow Agent"), Salomon Smith Barney Inc., Credit Suisse
First Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities
(USA) Inc. and Deutsche Bank Securities Inc., as Underwriters of the
Certificates referred to below (the "Underwriters" and together with their
respective transferees and assigns as registered owners of the Certificates, the
"Investors") under the Underwriting Agreement referred to below, State Street
Bank and Trust Company of Connecticut, National Association, a national banking
association, not in its individual capacity except as otherwise expressly
provided herein, but solely as trustee (in such capacity, together with its
successors in such capacity, the "Pass Through Trustee") under the Pass Through
Trust Agreement referred to below, and State Street Bank and Trust Company, as
paying agent hereunder (in such capacity, together with its successors in such
capacity, the "Paying Agent").

                              W I T N E S S E T H

            WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and the Pass Through Trustee have entered into a Trust Supplement, dated as of
the date hereof (the "Trust Supplement"), to the Pass Through Trust Agreement,
dated as of June 3, 1999, by and among the Guarantor, Northwest and the Pass
Through Trustee (the "Pass Through Trust Agreement") relating to Northwest
Airlines Pass Through Trust 1999-2A (the "Pass Through Trust") pursuant to which
the Northwest Airlines Pass Through Trust, Series 1999-2A Certificates referred
to therein (the "Certificates") are being issued;

            WHEREAS, Northwest and the Underwriters have entered into an
Underwriting Agreement dated as of June 18, 1999 (as amended, modified or
supplemented from time to time in accordance with the terms thereof, the
"Underwriting Agreement") pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

            WHEREAS, Northwest, the Pass Through Trustee, certain other pass
through trustees and certain other persons concurrently herewith are entering
into the Note Purchase Agreement, dated as of the date hereof (the "Note
Purchase Agreement"), pursuant to which the Pass Through Trustee has agreed to
acquire from time to time on or prior to the Delivery Period Termination Date
(as defined in the Note Purchase Agreement) equipment notes (the "Equipment
Notes") issued to finance the acquisition of aircraft by Northwest, as lessee or
as owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

            WHEREAS, the Underwriters and the Pass Through Trustee intend that
the Net Proceeds be held in escrow by the Escrow Agent on behalf of the
Investors, subject to withdrawal upon request by the Pass Through Trustee and
satisfaction of the conditions set forth in the Note Purchase Agreement for the
purpose of purchasing Equipment Notes, and that pending such withdrawal the Net
Proceeds be deposited on behalf of the Escrow Agent with ABN AMRO Bank N.V.,
Chicago Branch, as Depositary (the "Depositary") under the Deposit Agreement,
dated as of the date hereof, between the Depositary and the Escrow Agent
relating to the Pass

<PAGE>
                                                                               2


Through Trust (as amended, modified or supplemented from time to time in
accordance with the terms thereof, the "Deposit Agreement") pursuant to which,
among other things, the Depositary will pay interest for distribution to the
Investors and establish accounts from which the Escrow Agent shall make
withdrawals upon request of and proper certification by the Pass Through
Trustee;

            WHEREAS, the Escrow Agent wishes to appoint the Paying Agent to pay
amounts required to be distributed to the Investors in accordance with this
Agreement; and

            WHEREAS, capitalized terms used but not defined herein shall have
the respective meanings set forth or incorporated by reference in the Pass
Through Trust Agreement.

            NOW, THEREFORE, in consideration of the obligations contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows:

            SECTION 1. Escrow Agent.

            Section 1.1 Appointment of Escrow Agent. Each of the Underwriters,
for and on behalf of each of the Investors, hereby irrevocably appoints,
authorizes and directs the Escrow Agent to act as escrow agent and fiduciary
hereunder and under the Deposit Agreement for such specific purposes and with
such powers as are specifically delegated to the Escrow Agent by the terms of
this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Escrow Agent under this
Agreement or the Deposit Agreement shall be held in escrow by the Escrow Agent
in accordance with the terms of this Agreement. This Agreement is irrevocable
and the Investors' rights with respect to any monies received and held in escrow
by the Escrow Agent under this Agreement or the Deposit Agreement shall only be
as provided under the terms and conditions of this Agreement and the Deposit
Agreement. The Escrow Agent (which term as used in this sentence shall include
reference to its affiliates and its own and its affiliates' officers, directors,
employees and agents):

            (a) shall have no duties or responsibilities except those expressly
      set forth in this Agreement;

            (b) shall not be responsible to the Pass Through Trustee or the
      Investors for any recitals, statements, representations or warranties of
      any person other than itself contained in this Agreement or the Deposit
      Agreement or for the failure by the Pass Through Trustee, the Investors or
      any other person or entity (other than the Escrow Agent) to perform any of
      its obligations hereunder (whether or not the Escrow Agent shall have any
      knowledge thereof); and

            (c) shall not be responsible for any action taken or omitted to be
      taken by it hereunder or provided for herein or in connection herewith,
      except for its own willful misconduct or gross negligence (or simple
      negligence in connection with the handling of funds).

<PAGE>
                                                                               3


            Section 1.2 Instruction, Etc. The Underwriters, for and on behalf of
each of the Investors, hereby irrevocably instruct the Escrow Agent, and the
Escrow Agent agrees: (a) to enter into the Deposit Agreement; (b) to appoint the
Paying Agent as provided in this Agreement; (c) upon receipt at any time and
from time to time prior to the Termination Date (as defined below) of a
certificate substantially in the form of Exhibit B hereto (a "Withdrawal
Certificate") executed by the Pass Through Trustee, together with an attached
Notice of Purchase Withdrawal in substantially the form of Exhibit A to the
Deposit Agreement duly completed by the Pass Through Trustee (the "Applicable
Notice of Purchase Withdrawal" and the withdrawal to which it relates, a
"Purchase Withdrawal"), immediately to execute the Applicable Notice of Purchase
Withdrawal as Escrow Agent and transmit it to the Depositary by facsimile
transmission in accordance with the Deposit Agreement; provided that, upon the
request of the Pass Through Trustee after such transmission, the Escrow Agent
shall cancel such Applicable Notice of Purchase Withdrawal; and (d) if there are
any undrawn Deposits (as defined in the Deposit Agreement) on the "Termination
Date", which shall mean the earlier of (i) May 31, 2000 and (ii) the day on
which the Escrow Agent receives notice from the Pass Through Trustee that the
Pass Through Trustee's obligation to purchase Equipment Notes under the Note
Purchase Agreement has terminated, to give notice to the Depositary (with a copy
to the Paying Agent) substantially in the form of Exhibit B to the Deposit
Agreement requesting a withdrawal of all of the remaining Deposits, together
with accrued and unpaid interest on such Deposits to the date of withdrawal, on
the 15th day after the date that such notice of withdrawal is given to the
Depositary (or, if not a Business Day, on the next succeeding Business Day) (a
"Final Withdrawal"), provided that if the day scheduled for the Final Withdrawal
in accordance with the foregoing is within ten (10) days before or after a
Regular Distribution Date, then the Escrow Agent shall request that such
requested Final Withdrawal be made on such Regular Distribution Date (the date
of such requested withdrawal, the "Final Withdrawal Date"). If for any reason
the Escrow Agent shall have failed to give the Final Withdrawal Notice to the
Depositary on or before June 1, 2000, and there are unwithdrawn Deposits on such
date, the Final Withdrawal Date shall be deemed to be June 16, 2000.

            Section 1.3 Initial Escrow Amount; Issuance of Escrow Receipts. The
Escrow Agent hereby directs the Underwriters to, and the Underwriters hereby
acknowledge that on the date hereof they shall, irrevocably deliver to the
Depositary on behalf of the Escrow Agent, an amount in U.S. dollars ("Dollars")
and immediately available funds equal to $343,254,000 for deposit on behalf of
the Escrow Agent with the Depositary in accordance with Section 2.1 of the
Deposit Agreement. The Underwriters hereby instruct the Escrow Agent, upon
receipt of such sum from the Underwriters, to confirm such receipt by executing
and delivering to the Pass Through Trustee an Escrow Receipt in the form of
Exhibit A hereto (an "Escrow Receipt"), (a) to be affixed by the Pass Through
Trustee to each Certificate and (b) to evidence the same percentage interest
("Escrow Interest") in the Account Amounts (as defined below) as the Fractional
Undivided Interest in the Pass Through Trust evidenced by the Certificate to
which it is to be affixed. The Escrow Agent shall provide to the Pass Through
Trustee for attachment to each Certificate newly issued under and in accordance
with the Pass Through Trust Agreement an executed Escrow Receipt as the Pass
Through Trustee may from time to time request of the Escrow Agent. Each Escrow
Receipt shall be registered by the Escrow Agent in a register (the "Register")
maintained by the Escrow Agent in the same name and same manner as the

<PAGE>
                                                                               4


Certificate to which it is attached and may not thereafter be detached from such
Certificate to which it is to be affixed prior to the distribution of the Final
Withdrawal (the "Final Distribution"). After the Final Distribution, no
additional Escrow Receipts shall be issued and the Pass Through Trustee shall
request the return to the Escrow Agent for cancellation of all outstanding
Escrow Receipts.

            Section 1.4 Payments to Receiptholders. All payments and
distributions made to holders of an Escrow Receipt (collectively
"Receiptholders") in respect of the Escrow Receipt shall be made only from
amounts deposited in the Paying Agent Account (as defined below) ("Account
Amounts"). Each Receiptholder, by its acceptance of an Escrow Receipt, agrees
that (a) it will look solely to the Account Amounts for any payment or
distribution due to such Receiptholder pursuant to the terms of the Escrow
Receipt and this Agreement and (b) it will have no recourse to Northwest, the
Pass Through Trustee, the Paying Agent or the Escrow Agent, except as expressly
provided herein or in the Pass Through Trust Agreement. No Receiptholder shall
have any right to vote or in any manner otherwise control the operation and
management of the Paying Agent Account or the obligations of the parties hereto,
nor shall anything set forth herein, or contained in the terms of the Escrow
Receipt, be construed so as to constitute the Receiptholders from time to time
as partners or members of an association.

            Section 1.5 Mutilated, Destroyed, Lost or Stolen Escrow Receipt. If
(a) any mutilated Escrow Receipt is surrendered to the Escrow Agent or the
Escrow Agent receives evidence to its satisfaction of the destruction, loss or
theft of any Escrow Receipt and (b) there is delivered to the Escrow Agent and
the Pass Through Trustee such security, indemnity or bond, as may be required by
them to hold each of them harmless, then, absent notice to the Escrow Agent or
the Pass Through Trustee that such destroyed, lost or stolen Escrow Receipt has
been acquired by a bona fide purchaser, and provided that the requirements of
Section 8-405 of the Uniform Commercial Code in effect in any applicable
jurisdiction are met, the Escrow Agent shall execute, authenticate and deliver,
in exchange for or in lieu of any such mutilated, destroyed, lost or stolen
Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like Escrow
Interest in the Account Amounts and bearing a number not contemporaneously
outstanding.

            In connection with the issuance of any new Escrow Receipt under this
Section 1.5, the Escrow Agent may require the payment of a sum sufficient to
cover any tax or other governmental charge that may be imposed in relation
thereto and any other expenses (including the fees and expenses of the Pass
Through Trustee and the Escrow Agent) connected therewith.

            Any duplicate Escrow Receipt issued pursuant to this Section 1.5
shall constitute conclusive evidence of the appropriate Escrow Interest in the
Account Amounts, as if originally issued, whether or not the lost, stolen or
destroyed Escrow Receipt shall be found at any time.

            The provisions of this Section 1.5 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies with respect to the
replacement or payment of mutilated, destroyed, lost or stolen Escrow Receipts.

<PAGE>
                                                                               5


            Section 1.6 Additional Escrow Amounts. On the date of any Purchase
Withdrawal, the Pass Through Trustee may re-deposit with the Depositary some or
all of the amounts so withdrawn in accordance with Section 2.4 of the Deposit
Agreement.

            Section 1.7 Resignation or Removal of Escrow Agent. Subject to the
appointment and acceptance of a successor Escrow Agent as provided below, the
Escrow Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Investors, but may not otherwise be removed except for
cause by the written consent of the Investors with respect to Investors
representing Escrow Interests aggregating not less than a majority in interest
in the Account Amounts (an "Action of Investors"). Upon any such resignation or
removal, the Investors, by an Action of Investors, shall have the right to
appoint a successor Escrow Agent. If no successor Escrow Agent shall have been
so appointed and shall have accepted such appointment within thirty (30) days
after the retiring Escrow Agent's giving of notice of resignation or the removal
of the retiring Escrow Agent, then the retiring Escrow Agent may appoint a
successor Escrow Agent. Any successor Escrow Agent shall be a bank which has an
office in the United States with a combined capital and surplus of at least
$100,000,000. Upon the acceptance of any appointment as Escrow Agent hereunder
by a successor Escrow Agent, such successor Escrow Agent shall enter into such
documents as the Pass Through Trustee shall require and shall thereupon succeed
to and become vested with all the rights, powers, privileges and duties of the
retiring Escrow Agent, and the retiring Escrow Agent shall be discharged from
its duties and obligations hereunder. No resignation or removal of the Escrow
Agent shall be effective unless a written confirmation shall have been obtained
from each of Moody's Investors Service, Inc. and Standard & Poor's Ratings
Services, a Division of the McGraw-Hill Companies, Inc., that the replacement of
the Escrow Agent with the successor Escrow Agent will not result in (a) a
reduction of the rating for the Certificates below the then current rating for
the Certificates or (b) a withdrawal or suspension of the rating of the
Certificates.

            Section 1.8 Persons Deemed Owners. Prior to due presentment of a
Certificate for registration of transfer, the Escrow Agent and the Paying Agent
may treat the Person in whose name any Escrow Receipt is registered (as of the
day of determination) as the owner of such Escrow Receipt for the purpose of
receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and neither the Escrow Agent nor the Paying Agent shall be affected
by any notice to the contrary.

            Section 1.9 Further Assurances. The Escrow Agent agrees to take such
actions, and execute such other documents, as may be reasonably requested by the
Pass Through Trustee in order to effectuate the purposes of this Agreement and
the performance by the Escrow Agent of its obligations hereunder.

            SECTION 2. Paying Agent.

            Section 2.1 Appointment of Paying Agent. The Escrow Agent hereby
irrevocably appoints and authorizes the Paying Agent to act as its paying agent
hereunder, for the benefit of the Investors, for such specific purposes and with
such powers as are specifically delegated to the Paying Agent by the terms of
this Agreement, together with such other powers as are reasonably

<PAGE>
                                                                               6


incidental thereto. Any and all money received and held by the Paying Agent
under this Agreement or the Deposit Agreement shall be held in the Paying Agent
Account for the benefit of the Investors. The Paying Agent (which term as used
in this sentence shall include reference to its affiliates and its own and its
affiliates' officers, directors, employees and agents):

            (a) shall have no duties or responsibilities except those expressly
set forth in this Agreement, and shall not by reason of this Agreement be a
trustee for the Escrow Agent;

            (b) shall not be responsible to the Escrow Agent for any recitals,
statements, representations or warranties of any person other then itself
contained in this Agreement or for the failure by the Escrow Agent or any other
person or entity (other than the Paying Agent) to perform any of its obligations
hereunder (whether or not the Paying Agent shall have any knowledge thereof);
and

            (c) shall not be responsible for any action taken or omitted to be
taken by it hereunder or provided for herein or in connection herewith, except
for its own willful misconduct or gross negligence (or simple negligence in
connection with the handling of funds).

            Section 2.2 Establishment of Paying Agent Account. The Paying Agent
shall establish a deposit account (the "Paying Agent Account") at State Street
Bank and Trust Company in the name of the Escrow Agent. It is expressly
understood by the parties hereto that the Paying Agent is acting as the paying
agent of the Escrow Agent hereunder and that no amounts on deposit in the Paying
Agent Account constitute part of the Trust Property.

            Section 2.3 Payments from Paying Agent Account. The Escrow Agent
hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees to
act, as follows:

            (a) On each Interest Payment Date (as defined in the Deposit
Agreement) or as soon thereafter as the Paying Agent has confirmed receipt in
the Paying Agent Account from the Depositary of any amount in respect of accrued
interest on the Deposits, the Paying Agent shall distribute out of the Paying
Agent Account the entire amount deposited therein by the Depositary. There shall
be so distributed to each Receiptholder of record on the 15th day (whether or
not a Business Day) preceding such Interest Payment Date by check mailed to such
Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount of interest deposited by the Depositary in
the Paying Agent Account on such date, except that, with respect to Escrow
Receipts registered on the Record Date in the name of The Depository Trust
Company, a New York corporation ("DTC"), such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (b) Upon the confirmation by the Paying Agent of receipt in the
Paying Agent Account from the Depositary of any amount in respect of the Final
Withdrawal, the Paying Agent shall forthwith distribute the entire amount of the
Final Withdrawal deposited therein by the Depositary. There shall be so
distributed to each Receiptholder of record on the 15th day (whether or not a
Business Day) preceding the Final Withdrawal Date by check mailed to such

<PAGE>
                                                                               7


Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount in the Paying Agent Account on account of
such Final Withdrawal, except that, with respect to Escrow Receipts registered
on the Record Date in the name of DTC, such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (c) If any payment of interest or principal in respect of the Final
Withdrawal is not received by the Paying Agent within five (5) days of the
applicable date when due, then it shall be distributed to Receiptholders after
actual receipt by the Paying Agent on the same basis as a Special Payment is
distributed under the Pass Through Trust Agreement.

            (d) The Paying Agent shall include with any check mailed pursuant to
this Section any notice required to be distributed under the Pass Through Trust
Agreement that is furnished to the Paying Agent by the Pass Through Trustee.

            Section 2.4 Withholding Taxes. The Paying Agent shall exclude and
withhold from each distribution of accrued interest on the Deposits (as defined
in the Deposit Agreement) and any amount in respect of the Final Withdrawal any
and all withholding taxes applicable thereto as required by law. The Paying
Agent agrees to act as such withholding agent and, in connection therewith,
whenever any present or future taxes or similar charges are required to be
withheld with respect to any amounts payable in respect of the Deposits (as
defined in the Deposit Agreement) or the escrow amounts, to withhold such
amounts and timely pay the same to the appropriate authority in the name of and
on behalf of the Receiptholders, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible after the
payment thereof, it will deliver to each such Receiptholder appropriate
documentation showing the payment thereof, together with such additional
documentary evidence as such Receiptholder may reasonably request from time to
time. The Paying Agent agrees to file any other information reports as it may be
required to file under United States law.

            Section 2.5 Resignation or Removal of Paying Agent. Subject to the
appointment and acceptance of a successor Paying Agent as provided below, the
Paying Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Escrow Agent, but may not otherwise be removed except for
cause by the Escrow Agent. Upon any such resignation or removal, the Escrow
Agent shall have the right to appoint a successor Paying Agent. If no successor
Paying Agent shall have been so appointed and shall have accepted such
appointment within thirty (30) days after the retiring Paying Agent's giving of
notice of resignation or the removal of the retiring Paying Agent, then the
retiring Paying Agent may appoint a successor Paying Agent. Any Successor Paying
Agent shall be a bank which has an office in the United States with a combined
capital and surplus of at least US$100,000,000. Upon the acceptance of any
appointment as Paying Agent hereunder by a successor Paying Agent, such
successor Paying Agent shall enter into such documents as the Escrow Agent shall
require and shall thereupon succeed to and become vested with all the rights,
powers, privileges and duties of the retiring Paying Agent, and the retiring
Paying Agent shall be discharged from its duties and obligations hereunder.

<PAGE>
                                                                               8


            Section 2.6 Notice of Final Withdrawal. Promptly after receipt by
the Paying Agent of notice that the Escrow Agent has requested a Final
Withdrawal or that a Final Withdrawal will be made, the Paying Agent shall cause
notice of the distribution of the Final Withdrawal to be mailed to each of the
Receiptholders at its address as it appears in the Register. Such notice shall
be mailed not less than fifteen (15) days prior to the Final Withdrawal Date.
Such notice shall set forth:

            (a) the Final Withdrawal Date and the date for determining
      Receiptholders of record who shall be entitled to receive distributions in
      respect of the Final Withdrawal;

            (b) the amount of the payment in respect of the Final Withdrawal for
      each $1,000 face amount Certificate (based on information provided by the
      Pass Through Trustee) and the amount thereof constituting unused Deposits
      (as defined in the Deposit Agreement) and interest thereon; and

            (c) if the Final Withdrawal Date is the same date as a Regular
      Distribution Date, the total amount to be received on such date for each
      $1,000 face amount Certificate (based on information provided by the Pass
      Through Trustee).

            Such mailing may include any notice required to be given to
Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement.

            SECTION 3. Payments. If, notwithstanding the instructions in Article
IV of the Deposit Agreement that all amounts payable to the Escrow Agent under
the Deposit Agreement be paid by the Depositary directly to the Paying Agent or
the Pass Through Trustee (depending on the circumstances), the Escrow Agent
receives any payment thereunder, then the Escrow Agent shall forthwith pay such
amount in Dollars and in immediately available funds by wire transfer to (a) in
the case of a payment of accrued interest on the Deposits (as defined in the
Deposit Agreement) or any Final Withdrawal, directly to the Paying Agent Account
and (b) in the case of any Purchase Withdrawal, directly to the Pass Through
Trustee or its designee as specified and in the manner provided in the
Applicable Notice of Purchase Withdrawal. The Escrow Agent hereby waives any and
all rights of set-off, combination of accounts, right of retention or similar
right (whether arising under applicable law, contract or otherwise) it may have
against amounts payable to the Paying Agent howsoever arising.

            SECTION 4. Other Actions. The Escrow Agent shall take such other
actions under or in respect of the Deposit Agreement (including, without
limitation, the enforcement of the obligations of the Depositary thereunder) as
the Investors, by an Action of Investors, may from time to time request.

            SECTION 5. Representations and Warranties of the Escrow Agent. The
Escrow Agent represents and warrants to Northwest, the Investors, the Paying
Agent and the Pass Through Trustee as follows:

<PAGE>
                                                                               9


            (a) it is a national banking association duly organized and validly
      existing in good standing under the laws of the United States of America;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement and the Deposit Agreement;

            (c) the execution, delivery and performance of each of this
      Agreement and the Deposit Agreement have been duly authorized by all
      necessary corporate action on the part of it and do not require any
      stockholder approval, or approval or consent of any trustee or holder of
      any indebtedness or obligations of it, and each such document has been
      duly executed and delivered by it and constitutes its legal, valid and
      binding obligations enforceable against it in accordance with the terms
      hereof or thereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement or the Deposit Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement or the Deposit Agreement, nor compliance with the terms and
      provisions hereof or thereof, conflicts or will conflict with or results
      or will result in a breach or violation of any of the terms, conditions or
      provisions of, or will require any consent or approval under, any law,
      governmental rule or regulation or the charter documents, as amended, or
      bylaws, as amended, of it or any similar instrument binding on it or any
      order, writ, injunction or decree of any court or governmental authority
      against it or by which it or any of its properties is bound or any
      indenture, mortgage or contract or other agreement or instrument to which
      it is a party or by which it or any of its properties is bound, or
      constitutes or will constitute a default thereunder or results or will
      result in the imposition of any lien upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or the Deposit Agreement or (B) would call into question or
      challenge the validity of this Agreement or the Deposit Agreement or the
      enforceability hereof or thereof in accordance with the terms hereof or
      thereof, nor is the Escrow Agent in default with respect to any order of
      any court, governmental authority, arbitration board or administrative
      agency so as to adversely affect its ability to perform its obligations
      under this Agreement or the Deposit Agreement.

<PAGE>
                                                                              10


            SECTION 6. Representations and Warranties of the Paying Agent. The
Paying Agent represents and warrants to Northwest, the Investors, the Escrow
Agent and the Pass Through Trustee as follows:

            (a) it is a trust company duly organized and validly existing in
      good standing under the laws of the Commonwealth of Massachusetts;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement has
      been duly authorized by all necessary corporate action on the part of it
      and does not require any stockholder approval, or approval or consent of
      any trustee or holder of any indebtedness or obligations of it, and such
      document has been duly executed and delivered by it and constitutes its
      legal, valid and binding obligations enforceable against it in accordance
      with the terms hereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement, nor compliance with the terms and provisions hereof, conflicts
      or will conflict with or results or will result in a breach or violation
      of any of the terms, conditions or provisions of, or will require any
      consent or approval under, any law, governmental rule or regulation or the
      charter documents, as amended, or bylaws, as amended, of it or any similar
      instrument binding on it or any order, writ, injunction or decree of any
      court or governmental authority against it or by which it or any of its
      properties is bound or any indenture, mortgage or contract or other
      agreement or instrument to which it is a party or by which it or any of
      its properties is bound, or constitutes or will constitute a default
      thereunder or results or will result in the imposition of any lien upon
      any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or (B) would call into question or challenge the validity of
      this Agreement or the enforceability hereof in accordance with the terms
      hereof, nor is the Paying Agent in default with respect to any order of
      any court, governmental

<PAGE>
                                                                              11


      authority, arbitration board or administrative agency so as to adversely
      affect its ability to perform its obligations under this Agreement.

            SECTION 7. Indemnification. Except for actions expressly required of
the Escrow Agent or the Paying Agent hereunder, each of the Escrow Agent and the
Paying Agent shall in all cases be fully justified in failing or refusing to act
hereunder unless it shall have been indemnified by the party requesting such
action in a manner reasonably satisfactory to it against any and all liability
and expense which may be incurred by it by reason of taking or continuing to
take any such action. In the event Northwest requests any amendment to any
Operative Document (as defined in the Note Purchase Agreement), the Pass Through
Trustee agrees to pay all reasonable fees and expenses (including, without
limitation, fees and disbursements of counsel) of the Escrow Agent and the
Paying Agent in connection therewith.

            SECTION 8. Amendment, Etc. Upon request of the Pass Through Trustee
and approval by an Action of Investors, the Escrow Agent shall enter into an
amendment to this Agreement, so long as such amendment does not adversely affect
the rights or obligations of the Escrow Agent or the Paying Agent, provided that
upon request of the Pass Through Trustee and without any consent of the
Investors, the Escrow Agent shall enter into an amendment to this Agreement for
any of the following purposes:

            (a) to correct or supplement any provision in this Agreement which
      may be defective or inconsistent with any other provision herein or to
      cure any ambiguity or correct any mistake or to modify any other provision
      with respect to matters or questions arising under this Agreement,
      provided that any such action shall not materially adversely affect the
      interests of the Investors; or

            (b) to comply with any requirement of the SEC, applicable law, rules
      or regulations of any exchange or quotation system on which the
      Certificates are listed or any regulatory body; or

            (c) to evidence and provide for the acceptance of appointment under
      this Agreement of a successor Escrow Agent, successor Paying Agent or
      successor Pass Through Trustee.

            SECTION 9. Notices. Unless otherwise expressly provided herein, any
notice or other communication under this Agreement shall be in writing
(including by facsimile) and shall be deemed to be given and effective upon
receipt thereof. All notices shall be sent to (a) in the case of the Investors,
as their respective addresses shall appear in the Register, (b) in the case of
the Escrow Agent, First Security Bank, National Association, 79 South Main
Street, Salt Lake City, UT 84111, Attention: Corporate Trust Services
(Telecopier: (801) 246-5053), (c) in the case of the Pass Through Trustee, State
Street Bank and Trust Company of Connecticut, National Association, 225 Asylum
Street, Goodwin Square, Hartford, Connecticut 06103, Attention: Corporate/Muni
Department (Telecopier: (860) 244-1889) or (d) in the case of the Paying Agent,
State Street Bank and Trust Company, 2 International Place, 4th Floor, Boston,
MA 02110, Attention: Corporate Trust Administration (Telecopier: (617)
664-5151), in each case with a

<PAGE>
                                                                              12


copy to Northwest Airlines, Inc., Department A4010, 5101 Northwest Drive, St.
Paul, MN 55111-3034, Attention: Treasurer (Telecopier: (612) 726-0665) (or at
such other address as any such party may specify from time to time in a written
notice to the other parties). On or prior to the execution of this Agreement,
the Pass Through Trustee has delivered to the Escrow Agent a certificate
containing specimen signatures of the representatives of the Pass Through
Trustee who are authorized to give notices and instructions with respect to this
Agreement. The Escrow Agent may conclusively rely on such certificate until the
Escrow Agent receives written notice from the Pass Through Trustee to the
contrary.

            SECTION 10. Transfer. No party hereto shall be entitled to assign or
otherwise transfer this Agreement (or any interest herein) other than (in the
case of the Escrow Agent) to a successor escrow agent under Section 1.7 hereof
or (in the case of the Paying Agent) to a successor paying agent under Section
2.5 hereof, and any purported assignment in violation thereof shall be void.
This Agreement shall be binding upon the parties hereto and their respective
successors and (in the case of the Escrow Agent and the Paying Agent) their
respective permitted assigns.

            SECTION 11. Entire Agreement. This Agreement sets forth all of the
promises, covenants, agreements, conditions and understandings among the Escrow
Agent, the Paying Agent, the Underwriters and the Pass Through Trustee with
respect to the subject matter hereof, and supersedes all prior and
contemporaneous agreements and undertakings, inducements or conditions, express
or implied, oral or written.

            SECTION 12. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

            SECTION 13. WAIVER OF JURY TRIAL RIGHT. EACH OF THE ESCROW AGENT,
THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES AND
ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO
THIS AGREEMENT SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

            SECTION 14. Counterparts. This Agreement may be executed in one or
more counterparts, all of which taken together shall constitute one instrument.

<PAGE>
                                                                              13


            IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent, the
Underwriters and the Pass Through Trustee have caused this Escrow and Paying
Agent Agreement (Class A) to be duly executed as of the day and year first above
written.

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual
                                capacity, but solely as Pass Through
                                Trustee for and on behalf of Northwest
                                Airlines Pass Through Trust 1999-2A

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT


                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By: /s/ Greg A. Hawley
                                   ---------------------------------------
                                     Name: Greg A. Hawley
                                     Title: Vice President


                                STATE STREET BANK AND TRUST
                                COMPANY, as Paying Agent

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT

<PAGE>
                                                                              14


                                SALOMON SMITH BARNEY INC.,
                                CREDIT SUISSE FIRST BOSTON CORPORATION,
                                ABN AMRO INCORPORATED,
                                CREDIT LYONNAIS SECURITIES (USA) INC. and
                                DEUTSCHE BANK SECURITIES INC., as Underwriters

                                By:  SALOMON SMITH BARNEY INC.

                                By: /s/ Roy Chandran
                                   ---------------------------------------
                                     Name: ROY CHANDRAN
                                     Title: VICE PRESIDENT

<PAGE>

                                                                       EXHIBIT A

              Northwest Airlines 1999-2A Escrow Receipt No. ____

            This Escrow Receipt evidences a fractional undivided interest in
amounts ("Account Amounts") from time to time deposited into a certain paying
agent account (the "Paying Agent Account") described in the Escrow and Paying
Agent Agreement (Class A) dated as of June 25, 1999 (as amended, modified or
supplemented from time to time, the "Escrow and Paying Agent Agreement") among
First Security Bank, National Association, a national banking association, as
Escrow Agent (in such capacity, together with its successors in such capacity,
the "Escrow Agent"), Salomon Smith Barney, Inc., Credit Suisse First Boston
Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA) Inc. and
Deutsche Bank Securities Inc., as Underwriters, State Street Bank and Trust
Company of Connecticut, National Association, as Pass Through Trustee (in such
capacity, together with its successors in such capacity, the "Pass Through
Trustee") and State Street Bank and Trust Company, as paying agent (in such
capacity, together with its successors in such capacity, the "Paying Agent").
Capitalized terms not defined herein shall have the meanings assigned to them in
the Escrow and Paying Agent Agreement.

            This Escrow Receipt is issued under and is subject to the terms,
provisions and conditions of the Escrow and Paying Agent Agreement. By virtue of
its acceptance hereof the holder of this Escrow Receipt assents and agrees to be
bound by the provisions of the Escrow and Paying Agent Agreement and this Escrow
Receipt.

            This Escrow Receipt represents a fractional undivided interest in
amounts deposited from time to time in the Paying Agent Account, and grants or
represents no rights, benefits or interests of any kind in respect of any assets
or property other than such amounts. This Escrow Receipt evidences the same
percentage interest in the Account Amounts as the Fractional Undivided Interest
in the Pass Through Trust evidenced by the Certificate to which this Escrow
Receipt is affixed.

            All payments and distributions made to Receiptholders in respect of
the Escrow Receipt shall be made only from Account Amounts deposited in the
Paying Agent Account. The holder of this Escrow Receipt, by its acceptance of
this Escrow Receipt, agrees that it will look solely to the Account Amounts for
any payment or distribution due to it pursuant to this Escrow Receipt and that
it will not have any recourse to Northwest, the Pass Through Trustee, the Paying
Agent or the Escrow Agent, except as expressly provided herein or in the Pass
Through Trust Agreement. No Receiptholder of this Escrow Receipt shall have any
right to vote or in any manner otherwise control the operation and management of
the Paying Agent Account, nor shall anything set forth herein, or contained in
the terms of this Escrow Receipt, be construed so as to constitute the
Receiptholders from time to time as partners or members of an association.

            This Escrow Receipt may not be assigned or transferred except in
connection with the assignment or transfer of the Certificate to which this
Escrow Receipt is affixed. After payment to the holder hereof of its Escrow
Interest in the Final Distribution, upon the request of

<PAGE>
                                                                               2


the Pass Through Trustee, the holder hereof will return this Escrow Receipt to
the Pass Through Trustee.

            The Paying Agent may treat the person in whose name the Certificate
to which this Escrow Receipt is attached as the owner hereof for all purposes,
and the Paying Agent shall not be affected by any notice to the contrary.

            THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK.

            IN WITNESS WHEREOF, the Escrow Agent has caused this Escrow Receipt
to be duly executed.

Dated:  June 25, 1999

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

<PAGE>

                                                                       EXHIBIT B

                            Withdrawal Certificate
                                   (Class A)

First Security Bank, National Association,
as Escrow Agent
79 South Main Street
Salt Lake City, UT 84111
Attention: Corporate Trust Services
Telecopier: (801) 246-5053

Ladies and Gentlemen:

            Reference is made to the Escrow and Paying Agent Agreement (Class A)
dated as of June 25, 1999 (the "Agreement"). We hereby certify to you that the
conditions to the obligations of the undersigned to execute a Participation
Agreement pursuant to the Note Purchase Agreement have been satisfied. Pursuant
to Section 1.2(c) of the Agreement, please execute the attached Notice of
Withdrawal and immediately transmit by facsimile to the Depositary, at (312)
606-8428.

                                Very truly yours,

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual capacity but
                                solely as Pass Through Trustee

                                By:
                                   ---------------------------------------------
                                      Name:
                                      Title:

Dated:  _________, ____

<PAGE>

                          NOTICE OF PURCHASE WITHDRAWAL

ABN AMRO Bank N.V., Chicago Branch
135 S. LaSalle Street, Suite 611
Chicago, IL  60674-9135
Attention:  Claudia Heldring
Telecopier:  (312) 606-8428

Ladies and Gentlemen:

            Reference is made to the Deposit Agreement (Class A) dated as of
June 25, 1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO Bank N.V., Chicago Branch, as
Depositary (the "Depositary").

            In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. __________.

            The undersigned hereby directs the Depositary to pay the proceeds of
the Deposit to ________________, Account No. ___________, Reference: ___________
on __________, _____, upon the telephonic request of a representative of the
Pass Through Trustee.

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

Dated:  ___________, ____



                                                                 EXHIBIT 4(f)(2)

                                                                  EXECUTION COPY

                        ESCROW AND PAYING AGENT AGREEMENT
                                    (Class B)

                            Dated as of June 25, 1999

                                      among

                    FIRST SECURITY BANK, NATIONAL ASSOCIATION

                                as Escrow Agent,

                            SALOMON SMITH BARNEY INC.

                     CREDIT SUISSE FIRST BOSTON CORPORATION

                              ABN AMRO INCORPORATED

                      CREDIT LYONNAIS SECURITIES (USA) INC.

                                       AND

                          DEUTSCHE BANK SECURITIES INC.
                                as Underwriters,

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,
                         not in its individual capacity,
                       but solely as Pass Through Trustee
                              for and on behalf of
                  Northwest Airlines Pass Through Trust 1999-2B
                            as Pass Through Trustee,

                                       AND

                      STATE STREET BANK AND TRUST COMPANY,

                                 as Paying Agent

<PAGE>

                              TABLE OF CONTENTS

                                                                          Page
                                                                          ----

SECTION 1.  Escrow Agent.....................................................2
      Section 1.1  Appointment of Escrow Agent...............................2
      Section 1.2  Instruction, Etc..........................................3
      Section 1.3  Initial Escrow Amount; Issuance of Escrow Receipts........3
      Section 1.4  Payments to Receiptholders................................4
      Section 1.5  Mutilated, Destroyed, Lost or Stolen Escrow Receipt.......4
      Section 1.6  Additional Escrow Amounts.................................5
      Section 1.7  Resignation or Removal of Escrow Agent....................5
      Section 1.8  Persons Deemed Owners.....................................5
      Section 1.9  Further Assurances........................................5

SECTION 2.  Paying Agent.....................................................6
      Section 2.1  Appointment of Paying Agent...............................6
      Section 2.2  Establishment of Paying Agent Account.....................6
      Section 2.3  Payments from Paying Agent Account........................6
      Section 2.4  Withholding Taxes.........................................7
      Section 2.5  Resignation or Removal of Paying Agent....................7
      Section 2.6  Notice of Final Withdrawal................................8

SECTION 3.  Payments.........................................................8

SECTION 4.  Other Actions....................................................8

SECTION 5.  Representations and Warranties of the Escrow Agent...............9

SECTION 6.  Representations and Warranties of the Paying Agent..............10

SECTION 7.  Indemnification.................................................11

SECTION 8.  Amendment, Etc..................................................11

SECTION 9.  Notices.........................................................11

SECTION 10.  Transfer.......................................................12

SECTION 11.  Entire Agreement...............................................12

SECTION 12.  Governing Law..................................................12

SECTION 13.  WAIVER OF JURY TRIAL RIGHT.....................................12

SECTION 14.  Counterparts...................................................12


                                     -i-

<PAGE>

EXHIBITS

Exhibit A     Escrow Receipt
Exhibit B     Withdrawal Certificate


                                     -ii-

<PAGE>

            This ESCROW AND PAYING AGENT AGREEMENT (Class B) dated as of June
25, 1999 (as amended, modified or supplemented from time to time, this
"Agreement") among First Security Bank, National Association, a national banking
association, as Escrow Agent (in such capacity, together with its successors in
such capacity, the "Escrow Agent"), Salomon Smith Barney Inc., Credit Suisse
First Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities
(USA) Inc. and Deutsche Bank Securities Inc., as Underwriters of the
Certificates referred to below (the "Underwriters" and together with their
respective transferees and assigns as registered owners of the Certificates, the
"Investors") under the Underwriting Agreement referred to below, State Street
Bank and Trust Company of Connecticut, National Association, a national banking
association, not in its individual capacity except as otherwise expressly
provided herein, but solely as trustee (in such capacity, together with its
successors in such capacity, the "Pass Through Trustee") under the Pass Through
Trust Agreement referred to below, and State Street Bank and Trust Company, as
paying agent hereunder (in such capacity, together with its successors in such
capacity, the "Paying Agent").

                              W I T N E S S E T H

            WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and the Pass Through Trustee have entered into a Trust Supplement, dated as of
the date hereof (the "Trust Supplement"), to the Pass Through Trust Agreement,
dated as of June 3, 1999, by and among the Guarantor, Northwest and the Pass
Through Trustee (the "Pass Through Trust Agreement") relating to Northwest
Airlines Pass Through Trust 1999-2B (the "Pass Through Trust") pursuant to which
the Northwest Airlines Pass Through Trust, Series 1999-2B Certificates referred
to therein (the "Certificates") are being issued;

            WHEREAS, Northwest and the Underwriters have entered into an
Underwriting Agreement dated as of June 18, 1999 (as amended, modified or
supplemented from time to time in accordance with the terms thereof, the
"Underwriting Agreement") pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

            WHEREAS, Northwest, the Pass Through Trustee, certain other pass
through trustees and certain other persons concurrently herewith are entering
into the Note Purchase Agreement, dated as of the date hereof (the "Note
Purchase Agreement"), pursuant to which the Pass Through Trustee has agreed to
acquire from time to time on or prior to the Delivery Period Termination Date
(as defined in the Note Purchase Agreement) equipment notes (the "Equipment
Notes") issued to finance the acquisition of aircraft by Northwest, as lessee or
as owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

            WHEREAS, the Underwriters and the Pass Through Trustee intend that
the Net Proceeds be held in escrow by the Escrow Agent on behalf of the
Investors, subject to withdrawal upon request by the Pass Through Trustee and
satisfaction of the conditions set forth in the Note Purchase Agreement for the
purpose of purchasing Equipment Notes, and that pending such withdrawal the Net
Proceeds be deposited on behalf of the Escrow Agent with ABN AMRO Bank N.V.,
Chicago Branch, as Depositary (the "Depositary") under the Deposit Agreement,
dated as of the date hereof, between the Depositary and the Escrow Agent
relating to the Pass

<PAGE>
                                                                               2


Through Trust (as amended, modified or supplemented from time to time in
accordance with the terms thereof, the "Deposit Agreement") pursuant to which,
among other things, the Depositary will pay interest for distribution to the
Investors and establish accounts from which the Escrow Agent shall make
withdrawals upon request of and proper certification by the Pass Through
Trustee;

            WHEREAS, the Escrow Agent wishes to appoint the Paying Agent to pay
amounts required to be distributed to the Investors in accordance with this
Agreement; and

            WHEREAS, capitalized terms used but not defined herein shall have
the respective meanings set forth or incorporated by reference in the Pass
Through Trust Agreement.

            NOW, THEREFORE, in consideration of the obligations contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows:

            SECTION 1. Escrow Agent.

            Section 1.1 Appointment of Escrow Agent. Each of the Underwriters,
for and on behalf of each of the Investors, hereby irrevocably appoints,
authorizes and directs the Escrow Agent to act as escrow agent and fiduciary
hereunder and under the Deposit Agreement for such specific purposes and with
such powers as are specifically delegated to the Escrow Agent by the terms of
this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Escrow Agent under this
Agreement or the Deposit Agreement shall be held in escrow by the Escrow Agent
in accordance with the terms of this Agreement. This Agreement is irrevocable
and the Investors' rights with respect to any monies received and held in escrow
by the Escrow Agent under this Agreement or the Deposit Agreement shall only be
as provided under the terms and conditions of this Agreement and the Deposit
Agreement. The Escrow Agent (which term as used in this sentence shall include
reference to its affiliates and its own and its affiliates' officers, directors,
employees and agents):

            (a) shall have no duties or responsibilities except those expressly
      set forth in this Agreement;

            (b) shall not be responsible to the Pass Through Trustee or the
      Investors for any recitals, statements, representations or warranties of
      any person other than itself contained in this Agreement or the Deposit
      Agreement or for the failure by the Pass Through Trustee, the Investors or
      any other person or entity (other than the Escrow Agent) to perform any of
      its obligations hereunder (whether or not the Escrow Agent shall have any
      knowledge thereof); and

            (c) shall not be responsible for any action taken or omitted to be
      taken by it hereunder or provided for herein or in connection herewith,
      except for its own willful misconduct or gross negligence (or simple
      negligence in connection with the handling of funds).

<PAGE>
                                                                               3


            Section 1.2 Instruction, Etc. The Underwriters, for and on behalf of
each of the Investors, hereby irrevocably instruct the Escrow Agent, and the
Escrow Agent agrees: (a) to enter into the Deposit Agreement; (b) to appoint the
Paying Agent as provided in this Agreement; (c) upon receipt at any time and
from time to time prior to the Termination Date (as defined below) of a
certificate substantially in the form of Exhibit B hereto (a "Withdrawal
Certificate") executed by the Pass Through Trustee, together with an attached
Notice of Purchase Withdrawal in substantially the form of Exhibit A to the
Deposit Agreement duly completed by the Pass Through Trustee (the "Applicable
Notice of Purchase Withdrawal" and the withdrawal to which it relates, a
"Purchase Withdrawal"), immediately to execute the Applicable Notice of Purchase
Withdrawal as Escrow Agent and transmit it to the Depositary by facsimile
transmission in accordance with the Deposit Agreement; provided that, upon the
request of the Pass Through Trustee after such transmission, the Escrow Agent
shall cancel such Applicable Notice of Purchase Withdrawal; and (d) if there are
any undrawn Deposits (as defined in the Deposit Agreement) on the "Termination
Date", which shall mean the earlier of (i) May 31, 2000 and (ii) the day on
which the Escrow Agent receives notice from the Pass Through Trustee that the
Pass Through Trustee's obligation to purchase Equipment Notes under the Note
Purchase Agreement has terminated, to give notice to the Depositary (with a copy
to the Paying Agent) substantially in the form of Exhibit B to the Deposit
Agreement requesting a withdrawal of all of the remaining Deposits, together
with accrued and unpaid interest on such Deposits to the date of withdrawal, on
the 15th day after the date that such notice of withdrawal is given to the
Depositary (or, if not a Business Day, on the next succeeding Business Day) (a
"Final Withdrawal"), provided that if the day scheduled for the Final Withdrawal
in accordance with the foregoing is within ten (10) days before or after a
Regular Distribution Date, then the Escrow Agent shall request that such
requested Final Withdrawal be made on such Regular Distribution Date (the date
of such requested withdrawal, the "Final Withdrawal Date"). If for any reason
the Escrow Agent shall have failed to give the Final Withdrawal Notice to the
Depositary on or before June 1, 2000, and there are unwithdrawn Deposits on such
date, the Final Withdrawal Date shall be deemed to be June 16, 2000.

            Section 1.3 Initial Escrow Amount; Issuance of Escrow Receipts. The
Escrow Agent hereby directs the Underwriters to, and the Underwriters hereby
acknowledge that on the date hereof they shall, irrevocably deliver to the
Depositary on behalf of the Escrow Agent, an amount in U.S. dollars ("Dollars")
and immediately available funds equal to $109,858,000 for deposit on behalf of
the Escrow Agent with the Depositary in accordance with Section 2.1 of the
Deposit Agreement. The Underwriters hereby instruct the Escrow Agent, upon
receipt of such sum from the Underwriters, to confirm such receipt by executing
and delivering to the Pass Through Trustee an Escrow Receipt in the form of
Exhibit A hereto (an "Escrow Receipt"), (a) to be affixed by the Pass Through
Trustee to each Certificate and (b) to evidence the same percentage interest
("Escrow Interest") in the Account Amounts (as defined below) as the Fractional
Undivided Interest in the Pass Through Trust evidenced by the Certificate to
which it is to be affixed. The Escrow Agent shall provide to the Pass Through
Trustee for attachment to each Certificate newly issued under and in accordance
with the Pass Through Trust Agreement an executed Escrow Receipt as the Pass
Through Trustee may from time to time request of the Escrow Agent. Each Escrow
Receipt shall be registered by the Escrow Agent in a register (the "Register")
maintained by the Escrow Agent in the same name and same manner as the

<PAGE>
                                                                               4


Certificate to which it is attached and may not thereafter be detached from such
Certificate to which it is to be affixed prior to the distribution of the Final
Withdrawal (the "Final Distribution"). After the Final Distribution, no
additional Escrow Receipts shall be issued and the Pass Through Trustee shall
request the return to the Escrow Agent for cancellation of all outstanding
Escrow Receipts.

            Section 1.4 Payments to Receiptholders. All payments and
distributions made to holders of an Escrow Receipt (collectively
"Receiptholders") in respect of the Escrow Receipt shall be made only from
amounts deposited in the Paying Agent Account (as defined below) ("Account
Amounts"). Each Receiptholder, by its acceptance of an Escrow Receipt, agrees
that (a) it will look solely to the Account Amounts for any payment or
distribution due to such Receiptholder pursuant to the terms of the Escrow
Receipt and this Agreement and (b) it will have no recourse to Northwest, the
Pass Through Trustee, the Paying Agent or the Escrow Agent, except as expressly
provided herein or in the Pass Through Trust Agreement. No Receiptholder shall
have any right to vote or in any manner otherwise control the operation and
management of the Paying Agent Account or the obligations of the parties hereto,
nor shall anything set forth herein, or contained in the terms of the Escrow
Receipt, be construed so as to constitute the Receiptholders from time to time
as partners or members of an association.

            Section 1.5 Mutilated, Destroyed, Lost or Stolen Escrow Receipt. If
(a) any mutilated Escrow Receipt is surrendered to the Escrow Agent or the
Escrow Agent receives evidence to its satisfaction of the destruction, loss or
theft of any Escrow Receipt and (b) there is delivered to the Escrow Agent and
the Pass Through Trustee such security, indemnity or bond, as may be required by
them to hold each of them harmless, then, absent notice to the Escrow Agent or
the Pass Through Trustee that such destroyed, lost or stolen Escrow Receipt has
been acquired by a bona fide purchaser, and provided that the requirements of
Section 8-405 of the Uniform Commercial Code in effect in any applicable
jurisdiction are met, the Escrow Agent shall execute, authenticate and deliver,
in exchange for or in lieu of any such mutilated, destroyed, lost or stolen
Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like Escrow
Interest in the Account Amounts and bearing a number not contemporaneously
outstanding.

            In connection with the issuance of any new Escrow Receipt under this
Section 1.5, the Escrow Agent may require the payment of a sum sufficient to
cover any tax or other governmental charge that may be imposed in relation
thereto and any other expenses (including the fees and expenses of the Pass
Through Trustee and the Escrow Agent) connected therewith.

            Any duplicate Escrow Receipt issued pursuant to this Section 1.5
shall constitute conclusive evidence of the appropriate Escrow Interest in the
Account Amounts, as if originally issued, whether or not the lost, stolen or
destroyed Escrow Receipt shall be found at any time.

            The provisions of this Section 1.5 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies with respect to the
replacement or payment of mutilated, destroyed, lost or stolen Escrow Receipts.

<PAGE>
                                                                               5


            Section 1.6 Additional Escrow Amounts. On the date of any Purchase
Withdrawal, the Pass Through Trustee may re-deposit with the Depositary some or
all of the amounts so withdrawn in accordance with Section 2.4 of the Deposit
Agreement.

            Section 1.7 Resignation or Removal of Escrow Agent. Subject to the
appointment and acceptance of a successor Escrow Agent as provided below, the
Escrow Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Investors, but may not otherwise be removed except for
cause by the written consent of the Investors with respect to Investors
representing Escrow Interests aggregating not less than a majority in interest
in the Account Amounts (an "Action of Investors"). Upon any such resignation or
removal, the Investors, by an Action of Investors, shall have the right to
appoint a successor Escrow Agent. If no successor Escrow Agent shall have been
so appointed and shall have accepted such appointment within thirty (30) days
after the retiring Escrow Agent's giving of notice of resignation or the removal
of the retiring Escrow Agent, then the retiring Escrow Agent may appoint a
successor Escrow Agent. Any successor Escrow Agent shall be a bank which has an
office in the United States with a combined capital and surplus of at least
$100,000,000. Upon the acceptance of any appointment as Escrow Agent hereunder
by a successor Escrow Agent, such successor Escrow Agent shall enter into such
documents as the Pass Through Trustee shall require and shall thereupon succeed
to and become vested with all the rights, powers, privileges and duties of the
retiring Escrow Agent, and the retiring Escrow Agent shall be discharged from
its duties and obligations hereunder. No resignation or removal of the Escrow
Agent shall be effective unless a written confirmation shall have been obtained
from each of Moody's Investors Service, Inc. and Standard & Poor's Ratings
Services, a Division of the McGraw-Hill Companies, Inc., that the replacement of
the Escrow Agent with the successor Escrow Agent will not result in (a) a
reduction of the rating for the Certificates below the then current rating for
the Certificates or (b) a withdrawal or suspension of the rating of the
Certificates.

            Section 1.8 Persons Deemed Owners. Prior to due presentment of a
Certificate for registration of transfer, the Escrow Agent and the Paying Agent
may treat the Person in whose name any Escrow Receipt is registered (as of the
day of determination) as the owner of such Escrow Receipt for the purpose of
receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and neither the Escrow Agent nor the Paying Agent shall be affected
by any notice to the contrary.

            Section 1.9 Further Assurances. The Escrow Agent agrees to take such
actions, and execute such other documents, as may be reasonably requested by the
Pass Through Trustee in order to effectuate the purposes of this Agreement and
the performance by the Escrow Agent of its obligations hereunder.

            SECTION 2. Paying Agent.

            Section 2.1 Appointment of Paying Agent. The Escrow Agent hereby
irrevocably appoints and authorizes the Paying Agent to act as its paying agent
hereunder, for the benefit of the Investors, for such specific purposes and with
such powers as are specifically delegated to the Paying Agent by the terms of
this Agreement, together with such other powers as are reasonably

<PAGE>
                                                                               6


incidental thereto. Any and all money received and held by the Paying Agent
under this Agreement or the Deposit Agreement shall be held in the Paying Agent
Account for the benefit of the Investors. The Paying Agent (which term as used
in this sentence shall include reference to its affiliates and its own and its
affiliates' officers, directors, employees and agents):

            (a) shall have no duties or responsibilities except those expressly
set forth in this Agreement, and shall not by reason of this Agreement be a
trustee for the Escrow Agent;

            (b) shall not be responsible to the Escrow Agent for any recitals,
statements, representations or warranties of any person other then itself
contained in this Agreement or for the failure by the Escrow Agent or any other
person or entity (other than the Paying Agent) to perform any of its obligations
hereunder (whether or not the Paying Agent shall have any knowledge thereof);
and

            (c) shall not be responsible for any action taken or omitted to be
taken by it hereunder or provided for herein or in connection herewith, except
for its own willful misconduct or gross negligence (or simple negligence in
connection with the handling of funds).

            Section 2.2 Establishment of Paying Agent Account. The Paying Agent
shall establish a deposit account (the "Paying Agent Account") at State Street
Bank and Trust Company in the name of the Escrow Agent. It is expressly
understood by the parties hereto that the Paying Agent is acting as the paying
agent of the Escrow Agent hereunder and that no amounts on deposit in the Paying
Agent Account constitute part of the Trust Property.

            Section 2.3 Payments from Paying Agent Account. The Escrow Agent
hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees to
act, as follows:

            (a) On each Interest Payment Date (as defined in the Deposit
Agreement) or as soon thereafter as the Paying Agent has confirmed receipt in
the Paying Agent Account from the Depositary of any amount in respect of accrued
interest on the Deposits, the Paying Agent shall distribute out of the Paying
Agent Account the entire amount deposited therein by the Depositary. There shall
be so distributed to each Receiptholder of record on the 15th day (whether or
not a Business Day) preceding such Interest Payment Date by check mailed to such
Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount of interest deposited by the Depositary in
the Paying Agent Account on such date, except that, with respect to Escrow
Receipts registered on the Record Date in the name of The Depository Trust
Company, a New York corporation ("DTC"), such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (b) Upon the confirmation by the Paying Agent of receipt in the
Paying Agent Account from the Depositary of any amount in respect of the Final
Withdrawal, the Paying Agent shall forthwith distribute the entire amount of the
Final Withdrawal deposited therein by the Depositary. There shall be so
distributed to each Receiptholder of record on the 15th day (whether or not a
Business Day) preceding the Final Withdrawal Date by check mailed to such

<PAGE>
                                                                               7


Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount in the Paying Agent Account on account of
such Final Withdrawal, except that, with respect to Escrow Receipts registered
on the Record Date in the name of DTC, such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (c) If any payment of interest or principal in respect of the Final
Withdrawal is not received by the Paying Agent within five (5) days of the
applicable date when due, then it shall be distributed to Receiptholders after
actual receipt by the Paying Agent on the same basis as a Special Payment is
distributed under the Pass Through Trust Agreement.

            (d) The Paying Agent shall include with any check mailed pursuant to
this Section any notice required to be distributed under the Pass Through Trust
Agreement that is furnished to the Paying Agent by the Pass Through Trustee.

            Section 2.4 Withholding Taxes. The Paying Agent shall exclude and
withhold from each distribution of accrued interest on the Deposits (as defined
in the Deposit Agreement) and any amount in respect of the Final Withdrawal any
and all withholding taxes applicable thereto as required by law. The Paying
Agent agrees to act as such withholding agent and, in connection therewith,
whenever any present or future taxes or similar charges are required to be
withheld with respect to any amounts payable in respect of the Deposits (as
defined in the Deposit Agreement) or the escrow amounts, to withhold such
amounts and timely pay the same to the appropriate authority in the name of and
on behalf of the Receiptholders, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible after the
payment thereof, it will deliver to each such Receiptholder appropriate
documentation showing the payment thereof, together with such additional
documentary evidence as such Receiptholder may reasonably request from time to
time. The Paying Agent agrees to file any other information reports as it may be
required to file under United States law.

            Section 2.5 Resignation or Removal of Paying Agent. Subject to the
appointment and acceptance of a successor Paying Agent as provided below, the
Paying Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Escrow Agent, but may not otherwise be removed except for
cause by the Escrow Agent. Upon any such resignation or removal, the Escrow
Agent shall have the right to appoint a successor Paying Agent. If no successor
Paying Agent shall have been so appointed and shall have accepted such
appointment within thirty (30) days after the retiring Paying Agent's giving of
notice of resignation or the removal of the retiring Paying Agent, then the
retiring Paying Agent may appoint a successor Paying Agent. Any Successor Paying
Agent shall be a bank which has an office in the United States with a combined
capital and surplus of at least US$100,000,000. Upon the acceptance of any
appointment as Paying Agent hereunder by a successor Paying Agent, such
successor Paying Agent shall enter into such documents as the Escrow Agent shall
require and shall thereupon succeed to and become vested with all the rights,
powers, privileges and duties of the retiring Paying Agent, and the retiring
Paying Agent shall be discharged from its duties and obligations hereunder.

<PAGE>
                                                                               8


            Section 2.6 Notice of Final Withdrawal. Promptly after receipt by
the Paying Agent of notice that the Escrow Agent has requested a Final
Withdrawal or that a Final Withdrawal will be made, the Paying Agent shall cause
notice of the distribution of the Final Withdrawal to be mailed to each of the
Receiptholders at its address as it appears in the Register. Such notice shall
be mailed not less than fifteen (15) days prior to the Final Withdrawal Date.
Such notice shall set forth:

            (a) the Final Withdrawal Date and the date for determining
      Receiptholders of record who shall be entitled to receive distributions in
      respect of the Final Withdrawal;

            (b) the amount of the payment in respect of the Final Withdrawal for
      each $1,000 face amount Certificate (based on information provided by the
      Pass Through Trustee) and the amount thereof constituting unused Deposits
      (as defined in the Deposit Agreement) and interest thereon; and

            (c) if the Final Withdrawal Date is the same date as a Regular
      Distribution Date, the total amount to be received on such date for each
      $1,000 face amount Certificate (based on information provided by the Pass
      Through Trustee).

            Such mailing may include any notice required to be given to
Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement.

            SECTION 3. Payments. If, notwithstanding the instructions in Article
IV of the Deposit Agreement that all amounts payable to the Escrow Agent under
the Deposit Agreement be paid by the Depositary directly to the Paying Agent or
the Pass Through Trustee (depending on the circumstances), the Escrow Agent
receives any payment thereunder, then the Escrow Agent shall forthwith pay such
amount in Dollars and in immediately available funds by wire transfer to (a) in
the case of a payment of accrued interest on the Deposits (as defined in the
Deposit Agreement) or any Final Withdrawal, directly to the Paying Agent Account
and (b) in the case of any Purchase Withdrawal, directly to the Pass Through
Trustee or its designee as specified and in the manner provided in the
Applicable Notice of Purchase Withdrawal. The Escrow Agent hereby waives any and
all rights of set-off, combination of accounts, right of retention or similar
right (whether arising under applicable law, contract or otherwise) it may have
against amounts payable to the Paying Agent howsoever arising.

            SECTION 4. Other Actions. The Escrow Agent shall take such other
actions under or in respect of the Deposit Agreement (including, without
limitation, the enforcement of the obligations of the Depositary thereunder) as
the Investors, by an Action of Investors, may from time to time request.

            SECTION 5. Representations and Warranties of the Escrow Agent. The
Escrow Agent represents and warrants to Northwest, the Investors, the Paying
Agent and the Pass Through Trustee as follows:

<PAGE>
                                                                               9


            (a) it is a national banking association duly organized and validly
      existing in good standing under the laws of the United States of America;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement and the Deposit Agreement;

            (c) the execution, delivery and performance of each of this
      Agreement and the Deposit Agreement have been duly authorized by all
      necessary corporate action on the part of it and do not require any
      stockholder approval, or approval or consent of any trustee or holder of
      any indebtedness or obligations of it, and each such document has been
      duly executed and delivered by it and constitutes its legal, valid and
      binding obligations enforceable against it in accordance with the terms
      hereof or thereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement or the Deposit Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement or the Deposit Agreement, nor compliance with the terms and
      provisions hereof or thereof, conflicts or will conflict with or results
      or will result in a breach or violation of any of the terms, conditions or
      provisions of, or will require any consent or approval under, any law,
      governmental rule or regulation or the charter documents, as amended, or
      bylaws, as amended, of it or any similar instrument binding on it or any
      order, writ, injunction or decree of any court or governmental authority
      against it or by which it or any of its properties is bound or any
      indenture, mortgage or contract or other agreement or instrument to which
      it is a party or by which it or any of its properties is bound, or
      constitutes or will constitute a default thereunder or results or will
      result in the imposition of any lien upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or the Deposit Agreement or (B) would call into question or
      challenge the validity of this Agreement or the Deposit Agreement or the
      enforceability hereof or thereof in accordance with the terms hereof or
      thereof, nor is the Escrow Agent in default with respect to any order of
      any court, governmental authority, arbitration board or administrative
      agency so as to adversely affect its ability to perform its obligations
      under this Agreement or the Deposit Agreement.

<PAGE>
                                                                              10


            SECTION 6. Representations and Warranties of the Paying Agent. The
Paying Agent represents and warrants to Northwest, the Investors, the Escrow
Agent and the Pass Through Trustee as follows:

            (a) it is a trust company duly organized and validly existing in
      good standing under the laws of the Commonwealth of Massachusetts;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement has
      been duly authorized by all necessary corporate action on the part of it
      and does not require any stockholder approval, or approval or consent of
      any trustee or holder of any indebtedness or obligations of it, and such
      document has been duly executed and delivered by it and constitutes its
      legal, valid and binding obligations enforceable against it in accordance
      with the terms hereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement, nor compliance with the terms and provisions hereof, conflicts
      or will conflict with or results or will result in a breach or violation
      of any of the terms, conditions or provisions of, or will require any
      consent or approval under, any law, governmental rule or regulation or the
      charter documents, as amended, or bylaws, as amended, of it or any similar
      instrument binding on it or any order, writ, injunction or decree of any
      court or governmental authority against it or by which it or any of its
      properties is bound or any indenture, mortgage or contract or other
      agreement or instrument to which it is a party or by which it or any of
      its properties is bound, or constitutes or will constitute a default
      thereunder or results or will result in the imposition of any lien upon
      any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or (B) would call into question or challenge the validity of
      this Agreement or the enforceability hereof in accordance with the terms
      hereof, nor is the Paying Agent in default with respect to any order of
      any court, governmental

<PAGE>
                                                                              11


      authority, arbitration board or administrative agency so as to adversely
      affect its ability to perform its obligations under this Agreement.

            SECTION 7. Indemnification. Except for actions expressly required of
the Escrow Agent or the Paying Agent hereunder, each of the Escrow Agent and the
Paying Agent shall in all cases be fully justified in failing or refusing to act
hereunder unless it shall have been indemnified by the party requesting such
action in a manner reasonably satisfactory to it against any and all liability
and expense which may be incurred by it by reason of taking or continuing to
take any such action. In the event Northwest requests any amendment to any
Operative Document (as defined in the Note Purchase Agreement), the Pass Through
Trustee agrees to pay all reasonable fees and expenses (including, without
limitation, fees and disbursements of counsel) of the Escrow Agent and the
Paying Agent in connection therewith.

            SECTION 8. Amendment, Etc. Upon request of the Pass Through Trustee
and approval by an Action of Investors, the Escrow Agent shall enter into an
amendment to this Agreement, so long as such amendment does not adversely affect
the rights or obligations of the Escrow Agent or the Paying Agent, provided that
upon request of the Pass Through Trustee and without any consent of the
Investors, the Escrow Agent shall enter into an amendment to this Agreement for
any of the following purposes:

            (a) to correct or supplement any provision in this Agreement which
      may be defective or inconsistent with any other provision herein or to
      cure any ambiguity or correct any mistake or to modify any other provision
      with respect to matters or questions arising under this Agreement,
      provided that any such action shall not materially adversely affect the
      interests of the Investors; or

            (b) to comply with any requirement of the SEC, applicable law, rules
      or regulations of any exchange or quotation system on which the
      Certificates are listed or any regulatory body; or

            (c) to evidence and provide for the acceptance of appointment under
      this Agreement of a successor Escrow Agent, successor Paying Agent or
      successor Pass Through Trustee.

            SECTION 9. Notices. Unless otherwise expressly provided herein, any
notice or other communication under this Agreement shall be in writing
(including by facsimile) and shall be deemed to be given and effective upon
receipt thereof. All notices shall be sent to (a) in the case of the Investors,
as their respective addresses shall appear in the Register, (b) in the case of
the Escrow Agent, First Security Bank, National Association, 79 South Main
Street, Salt Lake City, UT 84111, Attention: Corporate Trust Services
(Telecopier: (801) 246-5053), (c) in the case of the Pass Through Trustee, State
Street Bank and Trust Company of Connecticut, National Association, 225 Asylum
Street, Goodwin Square, Hartford, Connecticut 06103, Attention: Corporate/Muni
Department (Telecopier: (860) 244-1889) or (d) in the case of the Paying Agent,
State Street Bank and Trust Company, 2 International Place, 4th Floor, Boston,
MA 02110, Attention: Corporate Trust Administration (Telecopier: (617)
664-5151), in each case with a

<PAGE>
                                                                              12


copy to Northwest Airlines, Inc., Department A4010, 5101 Northwest Drive, St.
Paul, MN 55111-3034, Attention: Treasurer (Telecopier: (612) 726-0665) (or at
such other address as any such party may specify from time to time in a written
notice to the other parties). On or prior to the execution of this Agreement,
the Pass Through Trustee has delivered to the Escrow Agent a certificate
containing specimen signatures of the representatives of the Pass Through
Trustee who are authorized to give notices and instructions with respect to this
Agreement. The Escrow Agent may conclusively rely on such certificate until the
Escrow Agent receives written notice from the Pass Through Trustee to the
contrary.

            SECTION 10. Transfer. No party hereto shall be entitled to assign or
otherwise transfer this Agreement (or any interest herein) other than (in the
case of the Escrow Agent) to a successor escrow agent under Section 1.7 hereof
or (in the case of the Paying Agent) to a successor paying agent under Section
2.5 hereof, and any purported assignment in violation thereof shall be void.
This Agreement shall be binding upon the parties hereto and their respective
successors and (in the case of the Escrow Agent and the Paying Agent) their
respective permitted assigns.

            SECTION 11. Entire Agreement. This Agreement sets forth all of the
promises, covenants, agreements, conditions and understandings among the Escrow
Agent, the Paying Agent, the Underwriters and the Pass Through Trustee with
respect to the subject matter hereof, and supersedes all prior and
contemporaneous agreements and undertakings, inducements or conditions, express
or implied, oral or written.

            SECTION 12. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

            SECTION 13. WAIVER OF JURY TRIAL RIGHT. EACH OF THE ESCROW AGENT,
THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES AND
ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO
THIS AGREEMENT SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

            SECTION 14. Counterparts. This Agreement may be executed in one or
more counterparts, all of which taken together shall constitute one instrument.

<PAGE>
                                                                              13


            IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent, the
Underwriters and the Pass Through Trustee have caused this Escrow and Paying
Agent Agreement (Class B) to be duly executed as of the day and year first above
written.

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual
                                capacity, but solely as Pass Through
                                Trustee for and on behalf of Northwest
                                Airlines Pass Through Trust 1999-2B

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT


                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By: /s/ Greg A. Hawley
                                   ---------------------------------------
                                     Name: Greg A. Hawley
                                     Title: Vice President


                                STATE STREET BANK AND TRUST
                                COMPANY, as Paying Agent

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT

<PAGE>
                                                                              14


                                SALOMON SMITH BARNEY INC.,
                                CREDIT SUISSE FIRST BOSTON CORPORATION,
                                ABN AMRO INCORPORATED,
                                CREDIT LYONNAIS SECURITIES (USA) INC. and
                                DEUTSCHE BANK SECURITIES INC., as Underwriters

                                By:  SALOMON SMITH BARNEY INC.

                                By: /s/ Roy Chandran
                                   ---------------------------------------
                                     Name: ROY CHANDRAN
                                     Title: VICE PRESIDENT

<PAGE>

                                                                       EXHIBIT A

              Northwest Airlines 1999-2B Escrow Receipt No. ____

            This Escrow Receipt evidences a fractional undivided interest in
amounts ("Account Amounts") from time to time deposited into a certain paying
agent account (the "Paying Agent Account") described in the Escrow and Paying
Agent Agreement (Class B) dated as of June 25, 1999 (as amended, modified or
supplemented from time to time, the "Escrow and Paying Agent Agreement") among
First Security Bank, National Association, a national banking association, as
Escrow Agent (in such capacity, together with its successors in such capacity,
the "Escrow Agent"), Salomon Smith Barney, Inc., Credit Suisse First Boston
Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA) Inc. and
Deutsche Bank Securities Inc., as Underwriters, State Street Bank and Trust
Company of Connecticut, National Association, as Pass Through Trustee (in such
capacity, together with its successors in such capacity, the "Pass Through
Trustee") and State Street Bank and Trust Company, as paying agent (in such
capacity, together with its successors in such capacity, the "Paying Agent").
Capitalized terms not defined herein shall have the meanings assigned to them in
the Escrow and Paying Agent Agreement.

            This Escrow Receipt is issued under and is subject to the terms,
provisions and conditions of the Escrow and Paying Agent Agreement. By virtue of
its acceptance hereof the holder of this Escrow Receipt assents and agrees to be
bound by the provisions of the Escrow and Paying Agent Agreement and this Escrow
Receipt.

            This Escrow Receipt represents a fractional undivided interest in
amounts deposited from time to time in the Paying Agent Account, and grants or
represents no rights, benefits or interests of any kind in respect of any assets
or property other than such amounts. This Escrow Receipt evidences the same
percentage interest in the Account Amounts as the Fractional Undivided Interest
in the Pass Through Trust evidenced by the Certificate to which this Escrow
Receipt is affixed.

            All payments and distributions made to Receiptholders in respect of
the Escrow Receipt shall be made only from Account Amounts deposited in the
Paying Agent Account. The holder of this Escrow Receipt, by its acceptance of
this Escrow Receipt, agrees that it will look solely to the Account Amounts for
any payment or distribution due to it pursuant to this Escrow Receipt and that
it will not have any recourse to Northwest, the Pass Through Trustee, the Paying
Agent or the Escrow Agent, except as expressly provided herein or in the Pass
Through Trust Agreement. No Receiptholder of this Escrow Receipt shall have any
right to vote or in any manner otherwise control the operation and management of
the Paying Agent Account, nor shall anything set forth herein, or contained in
the terms of this Escrow Receipt, be construed so as to constitute the
Receiptholders from time to time as partners or members of an association.

            This Escrow Receipt may not be assigned or transferred except in
connection with the assignment or transfer of the Certificate to which this
Escrow Receipt is affixed. After payment to the holder hereof of its Escrow
Interest in the Final Distribution, upon the request of

<PAGE>
                                                                               2


the Pass Through Trustee, the holder hereof will return this Escrow Receipt to
the Pass Through Trustee.

            The Paying Agent may treat the person in whose name the Certificate
to which this Escrow Receipt is attached as the owner hereof for all purposes,
and the Paying Agent shall not be affected by any notice to the contrary.

            THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK.

            IN WITNESS WHEREOF, the Escrow Agent has caused this Escrow Receipt
to be duly executed.

Dated:  June 25, 1999

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

<PAGE>

                                                                       EXHIBIT B

                            Withdrawal Certificate
                                   (Class B)

First Security Bank, National Association,
as Escrow Agent
79 South Main Street
Salt Lake City, UT 84111
Attention: Corporate Trust Services
Telecopier: (801) 246-5053

Ladies and Gentlemen:

            Reference is made to the Escrow and Paying Agent Agreement (Class B)
dated as of June 25, 1999 (the "Agreement"). We hereby certify to you that the
conditions to the obligations of the undersigned to execute a Participation
Agreement pursuant to the Note Purchase Agreement have been satisfied. Pursuant
to Section 1.2(c) of the Agreement, please execute the attached Notice of
Withdrawal and immediately transmit by facsimile to the Depositary, at (312)
606-8428.

                                Very truly yours,

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual capacity but
                                solely as Pass Through Trustee

                                By:
                                   ---------------------------------------------
                                      Name:
                                      Title:

Dated:  _________, ____

<PAGE>
                                                                               2


                         NOTICE OF PURCHASE WITHDRAWAL

ABN AMRO Bank N.V., Chicago Branch
135 S. LaSalle Street, Suite 611
Chicago, IL  60674-9135
Attention:  Claudia Heldring
Telecopier:  (312) 606-8428

Ladies and Gentlemen:

            Reference is made to the Deposit Agreement (Class B) dated as of
June 25, 1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO Bank N.V., Chicago Branch, as
Depositary (the "Depositary").

            In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. __________.

            The undersigned hereby directs the Depositary to pay the proceeds of
the Deposit to ________________, Account No. ___________, Reference: ___________
on __________, _____, upon the telephonic request of a representative of the
Pass Through Trustee.

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

Dated:  ___________, ____



                                                                 EXHIBIT 4(f)(3)

                                                                  EXECUTION COPY

                        ESCROW AND PAYING AGENT AGREEMENT
                                    (Class C)

                            Dated as of June 25, 1999

                                      among

                    FIRST SECURITY BANK, NATIONAL ASSOCIATION

                                as Escrow Agent,

                            SALOMON SMITH BARNEY INC.

                     CREDIT SUISSE FIRST BOSTON CORPORATION

                              ABN AMRO INCORPORATED

                      CREDIT LYONNAIS SECURITIES (USA) INC.

                                       AND

                          DEUTSCHE BANK SECURITIES INC.
                                as Underwriters,

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,
                         not in its individual capacity,
                       but solely as Pass Through Trustee
                              for and on behalf of
                  Northwest Airlines Pass Through Trust 1999-2C
                            as Pass Through Trustee,

                                       AND

                      STATE STREET BANK AND TRUST COMPANY,

                                 as Paying Agent

<PAGE>

                              TABLE OF CONTENTS

                                                                          Page
                                                                          ----

SECTION 1.  Escrow Agent.....................................................2
      Section 1.1  Appointment of Escrow Agent...............................2
      Section 1.2  Instruction, Etc..........................................3
      Section 1.3  Initial Escrow Amount; Issuance of Escrow Receipts........3
      Section 1.4  Payments to Receiptholders................................4
      Section 1.5  Mutilated, Destroyed, Lost or Stolen Escrow Receipt.......4
      Section 1.6  Additional Escrow Amounts.................................5
      Section 1.7  Resignation or Removal of Escrow Agent....................5
      Section 1.8  Persons Deemed Owners.....................................5
      Section 1.9  Further Assurances........................................5

SECTION 2.  Paying Agent.....................................................6
      Section 2.1  Appointment of Paying Agent...............................6
      Section 2.2  Establishment of Paying Agent Account.....................6
      Section 2.3  Payments from Paying Agent Account........................6
      Section 2.4  Withholding Taxes.........................................7
      Section 2.5  Resignation or Removal of Paying Agent....................7
      Section 2.6  Notice of Final Withdrawal................................8

SECTION 3.  Payments.........................................................8

SECTION 4.  Other Actions....................................................8

SECTION 5.  Representations and Warranties of the Escrow Agent...............9

SECTION 6.  Representations and Warranties of the Paying Agent..............10

SECTION 7.  Indemnification.................................................11

SECTION 8.  Amendment, Etc..................................................11

SECTION 9.  Notices.........................................................11

SECTION 10.  Transfer.......................................................12

SECTION 11.  Entire Agreement...............................................12

SECTION 12.  Governing Law..................................................12

SECTION 13.  WAIVER OF JURY TRIAL RIGHT.....................................12

SECTION 14.  Counterparts...................................................12


                                     -i-

<PAGE>

EXHIBITS

Exhibit A     Escrow Receipt
Exhibit B     Withdrawal Certificate


                                     -ii-

<PAGE>

            This ESCROW AND PAYING AGENT AGREEMENT (Class C) dated as of June
25, 1999 (as amended, modified or supplemented from time to time, this
"Agreement") among First Security Bank, National Association, a national banking
association, as Escrow Agent (in such capacity, together with its successors in
such capacity, the "Escrow Agent"), Salomon Smith Barney Inc., Credit Suisse
First Boston Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities
(USA) Inc. and Deutsche Bank Securities Inc., as Underwriters of the
Certificates referred to below (the "Underwriters" and together with their
respective transferees and assigns as registered owners of the Certificates, the
"Investors") under the Underwriting Agreement referred to below, State Street
Bank and Trust Company of Connecticut, National Association, a national banking
association, not in its individual capacity except as otherwise expressly
provided herein, but solely as trustee (in such capacity, together with its
successors in such capacity, the "Pass Through Trustee") under the Pass Through
Trust Agreement referred to below, and State Street Bank and Trust Company, as
paying agent hereunder (in such capacity, together with its successors in such
capacity, the "Paying Agent").

                              W I T N E S S E T H

            WHEREAS, Northwest Airlines Corporation, a Delaware corporation (the
"Guarantor"), Northwest Airlines, Inc., a Minnesota corporation ("Northwest")
and the Pass Through Trustee have entered into a Trust Supplement, dated as of
the date hereof (the "Trust Supplement"), to the Pass Through Trust Agreement,
dated as of June 3, 1999, by and among the Guarantor, Northwest and the Pass
Through Trustee (the "Pass Through Trust Agreement") relating to Northwest
Airlines Pass Through Trust 1999-2C (the "Pass Through Trust") pursuant to which
the Northwest Airlines Pass Through Trust, Series 1999-2C Certificates referred
to therein (the "Certificates") are being issued;

            WHEREAS, Northwest and the Underwriters have entered into an
Underwriting Agreement dated as of June 18, 1999 (as amended, modified or
supplemented from time to time in accordance with the terms thereof, the
"Underwriting Agreement") pursuant to which the Pass Through Trustee will issue
and sell the Certificates to the Underwriters;

            WHEREAS, Northwest, the Pass Through Trustee, certain other pass
through trustees and certain other persons concurrently herewith are entering
into the Note Purchase Agreement, dated as of the date hereof (the "Note
Purchase Agreement"), pursuant to which the Pass Through Trustee has agreed to
acquire from time to time on or prior to the Delivery Period Termination Date
(as defined in the Note Purchase Agreement) equipment notes (the "Equipment
Notes") issued to finance the acquisition of aircraft by Northwest, as lessee or
as owner, utilizing a portion of the proceeds from the sale of the Certificates
(the "Net Proceeds");

            WHEREAS, the Underwriters and the Pass Through Trustee intend that
the Net Proceeds be held in escrow by the Escrow Agent on behalf of the
Investors, subject to withdrawal upon request by the Pass Through Trustee and
satisfaction of the conditions set forth in the Note Purchase Agreement for the
purpose of purchasing Equipment Notes, and that pending such withdrawal the Net
Proceeds be deposited on behalf of the Escrow Agent with ABN AMRO Bank N.V.,
Chicago Branch, as Depositary (the "Depositary") under the Deposit Agreement,
dated as of the date hereof, between the Depositary and the Escrow Agent
relating to the Pass

<PAGE>

                                                                               2

Through Trust (as amended, modified or supplemented from time to time in
accordance with the terms thereof, the "Deposit Agreement") pursuant to which,
among other things, the Depositary will pay interest for distribution to the
Investors and establish accounts from which the Escrow Agent shall make
withdrawals upon request of and proper certification by the Pass Through
Trustee;

            WHEREAS, the Escrow Agent wishes to appoint the Paying Agent to pay
amounts required to be distributed to the Investors in accordance with this
Agreement; and

            WHEREAS, capitalized terms used but not defined herein shall have
the respective meanings set forth or incorporated by reference in the Pass
Through Trust Agreement.

            NOW, THEREFORE, in consideration of the obligations contained
herein, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows:

            SECTION 1. Escrow Agent.

            Section 1.1 Appointment of Escrow Agent. Each of the Underwriters,
for and on behalf of each of the Investors, hereby irrevocably appoints,
authorizes and directs the Escrow Agent to act as escrow agent and fiduciary
hereunder and under the Deposit Agreement for such specific purposes and with
such powers as are specifically delegated to the Escrow Agent by the terms of
this Agreement, together with such other powers as are reasonably incidental
thereto. Any and all money received and held by the Escrow Agent under this
Agreement or the Deposit Agreement shall be held in escrow by the Escrow Agent
in accordance with the terms of this Agreement. This Agreement is irrevocable
and the Investors' rights with respect to any monies received and held in escrow
by the Escrow Agent under this Agreement or the Deposit Agreement shall only be
as provided under the terms and conditions of this Agreement and the Deposit
Agreement. The Escrow Agent (which term as used in this sentence shall include
reference to its affiliates and its own and its affiliates' officers, directors,
employees and agents):

            (a) shall have no duties or responsibilities except those expressly
      set forth in this Agreement;

            (b) shall not be responsible to the Pass Through Trustee or the
      Investors for any recitals, statements, representations or warranties of
      any person other than itself contained in this Agreement or the Deposit
      Agreement or for the failure by the Pass Through Trustee, the Investors or
      any other person or entity (other than the Escrow Agent) to perform any of
      its obligations hereunder (whether or not the Escrow Agent shall have any
      knowledge thereof); and

            (c) shall not be responsible for any action taken or omitted to be
      taken by it hereunder or provided for herein or in connection herewith,
      except for its own willful misconduct or gross negligence (or simple
      negligence in connection with the handling of funds).


<PAGE>

                                                                               3


            Section 1.2 Instruction, Etc. The Underwriters, for and on behalf of
each of the Investors, hereby irrevocably instruct the Escrow Agent, and the
Escrow Agent agrees: (a) to enter into the Deposit Agreement; (b) to appoint the
Paying Agent as provided in this Agreement; (c) upon receipt at any time and
from time to time prior to the Termination Date (as defined below) of a
certificate substantially in the form of Exhibit B hereto (a "Withdrawal
Certificate") executed by the Pass Through Trustee, together with an attached
Notice of Purchase Withdrawal in substantially the form of Exhibit A to the
Deposit Agreement duly completed by the Pass Through Trustee (the "Applicable
Notice of Purchase Withdrawal" and the withdrawal to which it relates, a
"Purchase Withdrawal"), immediately to execute the Applicable Notice of Purchase
Withdrawal as Escrow Agent and transmit it to the Depositary by facsimile
transmission in accordance with the Deposit Agreement; provided that, upon the
request of the Pass Through Trustee after such transmission, the Escrow Agent
shall cancel such Applicable Notice of Purchase Withdrawal; and (d) if there are
any undrawn Deposits (as defined in the Deposit Agreement) on the "Termination
Date", which shall mean the earlier of (i) May 31, 2000 and (ii) the day on
which the Escrow Agent receives notice from the Pass Through Trustee that the
Pass Through Trustee's obligation to purchase Equipment Notes under the Note
Purchase Agreement has terminated, to give notice to the Depositary (with a copy
to the Paying Agent) substantially in the form of Exhibit B to the Deposit
Agreement requesting a withdrawal of all of the remaining Deposits, together
with accrued and unpaid interest on such Deposits to the date of withdrawal, on
the 15th day after the date that such notice of withdrawal is given to the
Depositary (or, if not a Business Day, on the next succeeding Business Day) (a
"Final Withdrawal"), provided that if the day scheduled for the Final Withdrawal
in accordance with the foregoing is within ten (10) days before or after a
Regular Distribution Date, then the Escrow Agent shall request that such
requested Final Withdrawal be made on such Regular Distribution Date (the date
of such requested withdrawal, the "Final Withdrawal Date"). If for any reason
the Escrow Agent shall have failed to give the Final Withdrawal Notice to the
Depositary on or before June 1, 2000, and there are unwithdrawn Deposits on such
date, the Final Withdrawal Date shall be deemed to be June 16, 2000.

            Section 1.3 Initial Escrow Amount; Issuance of Escrow Receipts. The
Escrow Agent hereby directs the Underwriters to, and the Underwriters hereby
acknowledge that on the date hereof they shall, irrevocably deliver to the
Depositary on behalf of the Escrow Agent, an amount in U.S. dollars ("Dollars")
and immediately available funds equal to $102,122,000 for deposit on behalf of
the Escrow Agent with the Depositary in accordance with Section 2.1 of the
Deposit Agreement. The Underwriters hereby instruct the Escrow Agent, upon
receipt of such sum from the Underwriters, to confirm such receipt by executing
and delivering to the Pass Through Trustee an Escrow Receipt in the form of
Exhibit A hereto (an "Escrow Receipt"), (a) to be affixed by the Pass Through
Trustee to each Certificate and (b) to evidence the same percentage interest
("Escrow Interest") in the Account Amounts (as defined below) as the Fractional
Undivided Interest in the Pass Through Trust evidenced by the Certificate to
which it is to be affixed. The Escrow Agent shall provide to the Pass Through
Trustee for attachment to each Certificate newly issued under and in accordance
with the Pass Through Trust Agreement an executed Escrow Receipt as the Pass
Through Trustee may from time to time request of the Escrow Agent. Each Escrow
Receipt shall be registered by the Escrow Agent in a register (the "Register")
maintained by the Escrow Agent in the same name and same manner as the

<PAGE>

                                                                               4


Certificate to which it is attached and may not thereafter be detached from such
Certificate to which it is to be affixed prior to the distribution of the Final
Withdrawal (the "Final Distribution"). After the Final Distribution, no
additional Escrow Receipts shall be issued and the Pass Through Trustee shall
request the return to the Escrow Agent for cancellation of all outstanding
Escrow Receipts.

            Section 1.4 Payments to Receiptholders. All payments and
distributions made to holders of an Escrow Receipt (collectively
"Receiptholders") in respect of the Escrow Receipt shall be made only from
amounts deposited in the Paying Agent Account (as defined below) ("Account
Amounts"). Each Receiptholder, by its acceptance of an Escrow Receipt, agrees
that (a) it will look solely to the Account Amounts for any payment or
distribution due to such Receiptholder pursuant to the terms of the Escrow
Receipt and this Agreement and (b) it will have no recourse to Northwest, the
Pass Through Trustee, the Paying Agent or the Escrow Agent, except as expressly
provided herein or in the Pass Through Trust Agreement. No Receiptholder shall
have any right to vote or in any manner otherwise control the operation and
management of the Paying Agent Account or the obligations of the parties hereto,
nor shall anything set forth herein, or contained in the terms of the Escrow
Receipt, be construed so as to constitute the Receiptholders from time to time
as partners or members of an association.

            Section 1.5 Mutilated, Destroyed, Lost or Stolen Escrow Receipt. If
(a) any mutilated Escrow Receipt is surrendered to the Escrow Agent or the
Escrow Agent receives evidence to its satisfaction of the destruction, loss or
theft of any Escrow Receipt and (b) there is delivered to the Escrow Agent and
the Pass Through Trustee such security, indemnity or bond, as may be required by
them to hold each of them harmless, then, absent notice to the Escrow Agent or
the Pass Through Trustee that such destroyed, lost or stolen Escrow Receipt has
been acquired by a bona fide purchaser, and provided that the requirements of
Section 8-405 of the Uniform Commercial Code in effect in any applicable
jurisdiction are met, the Escrow Agent shall execute, authenticate and deliver,
in exchange for or in lieu of any such mutilated, destroyed, lost or stolen
Escrow Receipt, a new Escrow Receipt or Escrow Receipts and of like Escrow
Interest in the Account Amounts and bearing a number not contemporaneously
outstanding.

            In connection with the issuance of any new Escrow Receipt under this
Section 1.5, the Escrow Agent may require the payment of a sum sufficient to
cover any tax or other governmental charge that may be imposed in relation
thereto and any other expenses (including the fees and expenses of the Pass
Through Trustee and the Escrow Agent) connected therewith.

            Any duplicate Escrow Receipt issued pursuant to this Section 1.5
shall constitute conclusive evidence of the appropriate Escrow Interest in the
Account Amounts, as if originally issued, whether or not the lost, stolen or
destroyed Escrow Receipt shall be found at any time.

            The provisions of this Section 1.5 are exclusive and shall preclude
(to the extent lawful) all other rights and remedies with respect to the
replacement or payment of mutilated, destroyed, lost or stolen Escrow Receipts.

<PAGE>

                                                                               5


            Section 1.6 Additional Escrow Amounts. On the date of any Purchase
Withdrawal, the Pass Through Trustee may re-deposit with the Depositary some or
all of the amounts so withdrawn in accordance with Section 2.4 of the Deposit
Agreement.

            Section 1.7 Resignation or Removal of Escrow Agent. Subject to the
appointment and acceptance of a successor Escrow Agent as provided below, the
Escrow Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Investors, but may not otherwise be removed except for
cause by the written consent of the Investors with respect to Investors
representing Escrow Interests aggregating not less than a majority in interest
in the Account Amounts (an "Action of Investors"). Upon any such resignation or
removal, the Investors, by an Action of Investors, shall have the right to
appoint a successor Escrow Agent. If no successor Escrow Agent shall have been
so appointed and shall have accepted such appointment within thirty (30) days
after the retiring Escrow Agent's giving of notice of resignation or the removal
of the retiring Escrow Agent, then the retiring Escrow Agent may appoint a
successor Escrow Agent. Any successor Escrow Agent shall be a bank which has an
office in the United States with a combined capital and surplus of at least
$100,000,000. Upon the acceptance of any appointment as Escrow Agent hereunder
by a successor Escrow Agent, such successor Escrow Agent shall enter into such
documents as the Pass Through Trustee shall require and shall thereupon succeed
to and become vested with all the rights, powers, privileges and duties of the
retiring Escrow Agent, and the retiring Escrow Agent shall be discharged from
its duties and obligations hereunder. No resignation or removal of the Escrow
Agent shall be effective unless a written confirmation shall have been obtained
from each of Moody's Investors Service, Inc. and Standard & Poor's Ratings
Services, a Division of the McGraw-Hill Companies, Inc., that the replacement of
the Escrow Agent with the successor Escrow Agent will not result in (a) a
reduction of the rating for the Certificates below the then current rating for
the Certificates or (b) a withdrawal or suspension of the rating of the
Certificates.

            Section 1.8 Persons Deemed Owners. Prior to due presentment of a
Certificate for registration of transfer, the Escrow Agent and the Paying Agent
may treat the Person in whose name any Escrow Receipt is registered (as of the
day of determination) as the owner of such Escrow Receipt for the purpose of
receiving distributions pursuant to this Agreement and for all other purposes
whatsoever, and neither the Escrow Agent nor the Paying Agent shall be affected
by any notice to the contrary.

            Section 1.9 Further Assurances. The Escrow Agent agrees to take such
actions, and execute such other documents, as may be reasonably requested by the
Pass Through Trustee in order to effectuate the purposes of this Agreement and
the performance by the Escrow Agent of its obligations hereunder.

            SECTION 2. Paying Agent.

            Section 2.1 Appointment of Paying Agent. The Escrow Agent hereby
irrevocably appoints and authorizes the Paying Agent to act as its paying agent
hereunder, for the benefit of the Investors, for such specific purposes and with
such powers as are specifically delegated to the Paying Agent by the terms of
this Agreement, together with such other powers as are reasonably

<PAGE>

                                                                               6


incidental thereto. Any and all money received and held by the Paying Agent
under this Agreement or the Deposit Agreement shall be held in the Paying Agent
Account for the benefit of the Investors. The Paying Agent (which term as used
in this sentence shall include reference to its affiliates and its own and its
affiliates' officers, directors, employees and agents):

            (a) shall have no duties or responsibilities except those expressly
set forth in this Agreement, and shall not by reason of this Agreement be a
trustee for the Escrow Agent;

            (b) shall not be responsible to the Escrow Agent for any recitals,
statements, representations or warranties of any person other then itself
contained in this Agreement or for the failure by the Escrow Agent or any other
person or entity (other than the Paying Agent) to perform any of its obligations
hereunder (whether or not the Paying Agent shall have any knowledge thereof);
and

            (c) shall not be responsible for any action taken or omitted to be
taken by it hereunder or provided for herein or in connection herewith, except
for its own willful misconduct or gross negligence (or simple negligence in
connection with the handling of funds).

            Section 2.2 Establishment of Paying Agent Account. The Paying Agent
shall establish a deposit account (the "Paying Agent Account") at State Street
Bank and Trust Company in the name of the Escrow Agent. It is expressly
understood by the parties hereto that the Paying Agent is acting as the paying
agent of the Escrow Agent hereunder and that no amounts on deposit in the Paying
Agent Account constitute part of the Trust Property.

            Section 2.3 Payments from Paying Agent Account. The Escrow Agent
hereby irrevocably instructs the Paying Agent, and the Paying Agent agrees to
act, as follows:

            (a) On each Interest Payment Date (as defined in the Deposit
Agreement) or as soon thereafter as the Paying Agent has confirmed receipt in
the Paying Agent Account from the Depositary of any amount in respect of accrued
interest on the Deposits, the Paying Agent shall distribute out of the Paying
Agent Account the entire amount deposited therein by the Depositary. There shall
be so distributed to each Receiptholder of record on the 15th day (whether or
not a Business Day) preceding such Interest Payment Date by check mailed to such
Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount of interest deposited by the Depositary in
the Paying Agent Account on such date, except that, with respect to Escrow
Receipts registered on the Record Date in the name of The Depository Trust
Company, a New York corporation ("DTC"), such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (b) Upon the confirmation by the Paying Agent of receipt in the
Paying Agent Account from the Depositary of any amount in respect of the Final
Withdrawal, the Paying Agent shall forthwith distribute the entire amount of the
Final Withdrawal deposited therein by the Depositary. There shall be so
distributed to each Receiptholder of record on the 15th day (whether or not a
Business Day) preceding the Final Withdrawal Date by check mailed to such

<PAGE>

                                                                               7


Receiptholder, at the address appearing in the Register, such Receiptholder's
pro rata share (based on the Escrow Interest in the Account Amounts held by such
Receiptholder) of the total amount in the Paying Agent Account on account of
such Final Withdrawal, except that, with respect to Escrow Receipts registered
on the Record Date in the name of DTC, such distribution shall be made by wire
transfer in immediately available funds to the account designated by DTC.

            (c) If any payment of interest or principal in respect of the Final
Withdrawal is not received by the Paying Agent within five (5) days of the
applicable date when due, then it shall be distributed to Receiptholders after
actual receipt by the Paying Agent on the same basis as a Special Payment is
distributed under the Pass Through Trust Agreement.

            (d) The Paying Agent shall include with any check mailed pursuant to
this Section any notice required to be distributed under the Pass Through Trust
Agreement that is furnished to the Paying Agent by the Pass Through Trustee.

            Section 2.4 Withholding Taxes. The Paying Agent shall exclude and
withhold from each distribution of accrued interest on the Deposits (as defined
in the Deposit Agreement) and any amount in respect of the Final Withdrawal any
and all withholding taxes applicable thereto as required by law. The Paying
Agent agrees to act as such withholding agent and, in connection therewith,
whenever any present or future taxes or similar charges are required to be
withheld with respect to any amounts payable in respect of the Deposits (as
defined in the Deposit Agreement) or the escrow amounts, to withhold such
amounts and timely pay the same to the appropriate authority in the name of and
on behalf of the Receiptholders, that it will file any necessary withholding tax
returns or statements when due, and that, as promptly as possible after the
payment thereof, it will deliver to each such Receiptholder appropriate
documentation showing the payment thereof, together with such additional
documentary evidence as such Receiptholder may reasonably request from time to
time. The Paying Agent agrees to file any other information reports as it may be
required to file under United States law.

            Section 2.5 Resignation or Removal of Paying Agent. Subject to the
appointment and acceptance of a successor Paying Agent as provided below, the
Paying Agent may resign at any time by giving thirty (30) days' prior written
notice thereof to the Escrow Agent, but may not otherwise be removed except for
cause by the Escrow Agent. Upon any such resignation or removal, the Escrow
Agent shall have the right to appoint a successor Paying Agent. If no successor
Paying Agent shall have been so appointed and shall have accepted such
appointment within thirty (30) days after the retiring Paying Agent's giving of
notice of resignation or the removal of the retiring Paying Agent, then the
retiring Paying Agent may appoint a successor Paying Agent. Any Successor Paying
Agent shall be a bank which has an office in the United States with a combined
capital and surplus of at least US$100,000,000. Upon the acceptance of any
appointment as Paying Agent hereunder by a successor Paying Agent, such
successor Paying Agent shall enter into such documents as the Escrow Agent shall
require and shall thereupon succeed to and become vested with all the rights,
powers, privileges and duties of the retiring Paying Agent, and the retiring
Paying Agent shall be discharged from its duties and obligations hereunder.

<PAGE>

                                                                               8


            Section 2.6 Notice of Final Withdrawal. Promptly after receipt by
the Paying Agent of notice that the Escrow Agent has requested a Final
Withdrawal or that a Final Withdrawal will be made, the Paying Agent shall cause
notice of the distribution of the Final Withdrawal to be mailed to each of the
Receiptholders at its address as it appears in the Register. Such notice shall
be mailed not less than fifteen (15) days prior to the Final Withdrawal Date.
Such notice shall set forth:

            (a) the Final Withdrawal Date and the date for determining
      Receiptholders of record who shall be entitled to receive distributions in
      respect of the Final Withdrawal;

            (b) the amount of the payment in respect of the Final Withdrawal for
      each $1,000 face amount Certificate (based on information provided by the
      Pass Through Trustee) and the amount thereof constituting unused Deposits
      (as defined in the Deposit Agreement) and interest thereon; and

            (c) if the Final Withdrawal Date is the same date as a Regular
      Distribution Date, the total amount to be received on such date for each
      $1,000 face amount Certificate (based on information provided by the Pass
      Through Trustee).

            Such mailing may include any notice required to be given to
Certificateholders in connection with such distribution pursuant to the Pass
Through Trust Agreement.

            SECTION 3. Payments. If, notwithstanding the instructions in Article
IV of the Deposit Agreement that all amounts payable to the Escrow Agent under
the Deposit Agreement be paid by the Depositary directly to the Paying Agent or
the Pass Through Trustee (depending on the circumstances), the Escrow Agent
receives any payment thereunder, then the Escrow Agent shall forthwith pay such
amount in Dollars and in immediately available funds by wire transfer to (a) in
the case of a payment of accrued interest on the Deposits (as defined in the
Deposit Agreement) or any Final Withdrawal, directly to the Paying Agent Account
and (b) in the case of any Purchase Withdrawal, directly to the Pass Through
Trustee or its designee as specified and in the manner provided in the
Applicable Notice of Purchase Withdrawal. The Escrow Agent hereby waives any and
all rights of set-off, combination of accounts, right of retention or similar
right (whether arising under applicable law, contract or otherwise) it may have
against amounts payable to the Paying Agent howsoever arising.

            SECTION 4. Other Actions. The Escrow Agent shall take such other
actions under or in respect of the Deposit Agreement (including, without
limitation, the enforcement of the obligations of the Depositary thereunder) as
the Investors, by an Action of Investors, may from time to time request.

            SECTION 5. Representations and Warranties of the Escrow Agent. The
Escrow Agent represents and warrants to Northwest, the Investors, the Paying
Agent and the Pass Through Trustee as follows:

<PAGE>

                                                                               9


            (a) it is a national banking association duly organized and validly
      existing in good standing under the laws of the United States of America;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement and the Deposit Agreement;

            (c) the execution, delivery and performance of each of this
      Agreement and the Deposit Agreement have been duly authorized by all
      necessary corporate action on the part of it and do not require any
      stockholder approval, or approval or consent of any trustee or holder of
      any indebtedness or obligations of it, and each such document has been
      duly executed and delivered by it and constitutes its legal, valid and
      binding obligations enforceable against it in accordance with the terms
      hereof or thereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement or the Deposit Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement or the Deposit Agreement, nor compliance with the terms and
      provisions hereof or thereof, conflicts or will conflict with or results
      or will result in a breach or violation of any of the terms, conditions or
      provisions of, or will require any consent or approval under, any law,
      governmental rule or regulation or the charter documents, as amended, or
      bylaws, as amended, of it or any similar instrument binding on it or any
      order, writ, injunction or decree of any court or governmental authority
      against it or by which it or any of its properties is bound or any
      indenture, mortgage or contract or other agreement or instrument to which
      it is a party or by which it or any of its properties is bound, or
      constitutes or will constitute a default thereunder or results or will
      result in the imposition of any lien upon any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or the Deposit Agreement or (B) would call into question or
      challenge the validity of this Agreement or the Deposit Agreement or the
      enforceability hereof or thereof in accordance with the terms hereof or
      thereof, nor is the Escrow Agent in default with respect to any order of
      any court, governmental authority, arbitration board or administrative
      agency so as to adversely affect its ability to perform its obligations
      under this Agreement or the Deposit Agreement.

<PAGE>

                                                                              10


            SECTION 6. Representations and Warranties of the Paying Agent. The
Paying Agent represents and warrants to Northwest, the Investors, the Escrow
Agent and the Pass Through Trustee as follows:

            (a) it is a trust company duly organized and validly existing in
      good standing under the laws of the Commonwealth of Massachusetts;

            (b) it has full power, authority and legal right to conduct its
      business and operations as currently conducted and to enter into and
      perform its obligations under this Agreement;

            (c) the execution, delivery and performance of this Agreement has
      been duly authorized by all necessary corporate action on the part of it
      and does not require any stockholder approval, or approval or consent of
      any trustee or holder of any indebtedness or obligations of it, and such
      document has been duly executed and delivered by it and constitutes its
      legal, valid and binding obligations enforceable against it in accordance
      with the terms hereof except as such enforceability may be limited by
      bankruptcy, insolvency, moratorium, reorganization or other similar laws
      or equitable principles of general application to or affecting the
      enforcement of creditors' rights generally (regardless of whether such
      enforceability is considered in a proceeding in equity or at law);

            (d) no authorization, consent or approval of or other action by, and
      no notice to or filing with, any United States federal or state
      governmental authority or regulatory body is required for the execution,
      delivery or performance by it of this Agreement;

            (e) neither the execution, delivery or performance by it of this
      Agreement, nor compliance with the terms and provisions hereof, conflicts
      or will conflict with or results or will result in a breach or violation
      of any of the terms, conditions or provisions of, or will require any
      consent or approval under, any law, governmental rule or regulation or the
      charter documents, as amended, or bylaws, as amended, of it or any similar
      instrument binding on it or any order, writ, injunction or decree of any
      court or governmental authority against it or by which it or any of its
      properties is bound or any indenture, mortgage or contract or other
      agreement or instrument to which it is a party or by which it or any of
      its properties is bound, or constitutes or will constitute a default
      thereunder or results or will result in the imposition of any lien upon
      any of its properties; and

            (f) there are no pending or, to its knowledge, threatened actions,
      suits, investigations or proceedings (whether or not purportedly on behalf
      of it) against or affecting it or any of its property before or by any
      court or administrative agency which, if adversely determined, (A) would
      adversely affect the ability of it to perform its obligations under this
      Agreement or (B) would call into question or challenge the validity of
      this Agreement or the enforceability hereof in accordance with the terms
      hereof, nor is the Paying Agent in default with respect to any order of
      any court, governmental

<PAGE>

                                                                              11


      authority, arbitration board or administrative agency so as to adversely
      affect its ability to perform its obligations under this Agreement.

            SECTION 7. Indemnification. Except for actions expressly required of
the Escrow Agent or the Paying Agent hereunder, each of the Escrow Agent and the
Paying Agent shall in all cases be fully justified in failing or refusing to act
hereunder unless it shall have been indemnified by the party requesting such
action in a manner reasonably satisfactory to it against any and all liability
and expense which may be incurred by it by reason of taking or continuing to
take any such action. In the event Northwest requests any amendment to any
Operative Document (as defined in the Note Purchase Agreement), the Pass Through
Trustee agrees to pay all reasonable fees and expenses (including, without
limitation, fees and disbursements of counsel) of the Escrow Agent and the
Paying Agent in connection therewith.

            SECTION 8. Amendment, Etc. Upon request of the Pass Through Trustee
and approval by an Action of Investors, the Escrow Agent shall enter into an
amendment to this Agreement, so long as such amendment does not adversely affect
the rights or obligations of the Escrow Agent or the Paying Agent, provided that
upon request of the Pass Through Trustee and without any consent of the
Investors, the Escrow Agent shall enter into an amendment to this Agreement for
any of the following purposes:

            (a) to correct or supplement any provision in this Agreement which
      may be defective or inconsistent with any other provision herein or to
      cure any ambiguity or correct any mistake or to modify any other provision
      with respect to matters or questions arising under this Agreement,
      provided that any such action shall not materially adversely affect the
      interests of the Investors; or

            (b) to comply with any requirement of the SEC, applicable law, rules
      or regulations of any exchange or quotation system on which the
      Certificates are listed or any regulatory body; or

            (c) to evidence and provide for the acceptance of appointment under
      this Agreement of a successor Escrow Agent, successor Paying Agent or
      successor Pass Through Trustee.

            SECTION 9. Notices. Unless otherwise expressly provided herein, any
notice or other communication under this Agreement shall be in writing
(including by facsimile) and shall be deemed to be given and effective upon
receipt thereof. All notices shall be sent to (a) in the case of the Investors,
as their respective addresses shall appear in the Register, (b) in the case of
the Escrow Agent, First Security Bank, National Association, 79 South Main
Street, Salt Lake City, UT 84111, Attention: Corporate Trust Services
(Telecopier: (801) 246-5053), (c) in the case of the Pass Through Trustee, State
Street Bank and Trust Company of Connecticut, National Association, 225 Asylum
Street, Goodwin Square, Hartford, Connecticut 06103, Attention: Corporate/Muni
Department (Telecopier: (860) 244-1889) or (d) in the case of the Paying Agent,
State Street Bank and Trust Company, 2 International Place, 4th Floor, Boston,
MA 02110, Attention: Corporate Trust Administration (Telecopier: (617)
664-5151), in each case with a

<PAGE>

                                                                              12


copy to Northwest Airlines, Inc., Department A4010, 5101 Northwest Drive, St.
Paul, MN 55111-3034, Attention: Treasurer (Telecopier: (612) 726-0665) (or at
such other address as any such party may specify from time to time in a written
notice to the other parties). On or prior to the execution of this Agreement,
the Pass Through Trustee has delivered to the Escrow Agent a certificate
containing specimen signatures of the representatives of the Pass Through
Trustee who are authorized to give notices and instructions with respect to this
Agreement. The Escrow Agent may conclusively rely on such certificate until the
Escrow Agent receives written notice from the Pass Through Trustee to the
contrary.

            SECTION 10. Transfer. No party hereto shall be entitled to assign or
otherwise transfer this Agreement (or any interest herein) other than (in the
case of the Escrow Agent) to a successor escrow agent under Section 1.7 hereof
or (in the case of the Paying Agent) to a successor paying agent under Section
2.5 hereof, and any purported assignment in violation thereof shall be void.
This Agreement shall be binding upon the parties hereto and their respective
successors and (in the case of the Escrow Agent and the Paying Agent) their
respective permitted assigns.

            SECTION 11. Entire Agreement. This Agreement sets forth all of the
promises, covenants, agreements, conditions and understandings among the Escrow
Agent, the Paying Agent, the Underwriters and the Pass Through Trustee with
respect to the subject matter hereof, and supersedes all prior and
contemporaneous agreements and undertakings, inducements or conditions, express
or implied, oral or written.

            SECTION 12. Governing Law. This Agreement shall be governed by, and
construed in accordance with, the laws of the State of New York.

            SECTION 13. WAIVER OF JURY TRIAL RIGHT. EACH OF THE ESCROW AGENT,
THE PAYING AGENT, THE INVESTORS AND THE PASS THROUGH TRUSTEE ACKNOWLEDGES AND
ACCEPTS THAT IN ANY SUIT, ACTION OR PROCEEDING ARISING OUT OF OR RELATING TO
THIS AGREEMENT SUCH PARTY IRREVOCABLY WAIVES ITS RIGHT TO A TRIAL BY JURY.

            SECTION 14. Counterparts. This Agreement may be executed in one or
more counterparts, all of which taken together shall constitute one instrument.

<PAGE>

                                                                              13


            IN WITNESS WHEREOF, the Escrow Agent, the Paying Agent, the
Underwriters and the Pass Through Trustee have caused this Escrow and Paying
Agent Agreement (Class C) to be duly executed as of the day and year first above
written.

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual
                                capacity, but solely as Pass Through
                                Trustee for and on behalf of Northwest
                                Airlines Pass Through Trust 1999-2C

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT


                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By: /s/ Greg A. Hawley
                                   ---------------------------------------
                                     Name: Greg A. Hawley
                                     Title: Vice President


                                STATE STREET BANK AND TRUST
                                COMPANY, as Paying Agent

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT

<PAGE>
                                                                              14


                                SALOMON SMITH BARNEY INC.,
                                CREDIT SUISSE FIRST BOSTON CORPORATION,
                                ABN AMRO INCORPORATED,
                                CREDIT LYONNAIS SECURITIES (USA) INC. and
                                DEUTSCHE BANK SECURITIES INC., as Underwriters

                                By:  SALOMON SMITH BARNEY INC.

                                By: /s/ Roy Chandran
                                   ---------------------------------------
                                     Name: ROY CHANDRAN
                                     Title: VICE PRESIDENT

<PAGE>

                                                                       EXHIBIT A

              Northwest Airlines 1999-2C Escrow Receipt No. ____

            This Escrow Receipt evidences a fractional undivided interest in
amounts ("Account Amounts") from time to time deposited into a certain paying
agent account (the "Paying Agent Account") described in the Escrow and Paying
Agent Agreement (Class C) dated as of June 25, 1999 (as amended, modified or
supplemented from time to time, the "Escrow and Paying Agent Agreement") among
First Security Bank, National Association, a national banking association, as
Escrow Agent (in such capacity, together with its successors in such capacity,
the "Escrow Agent"), Salomon Smith Barney, Inc., Credit Suisse First Boston
Corporation, ABN AMRO Incorporated, Credit Lyonnais Securities (USA) Inc. and
Deutsche Bank Securities Inc., as Underwriters, State Street Bank and Trust
Company of Connecticut, National Association, as Pass Through Trustee (in such
capacity, together with its successors in such capacity, the "Pass Through
Trustee") and State Street Bank and Trust Company, as paying agent (in such
capacity, together with its successors in such capacity, the "Paying Agent").
Capitalized terms not defined herein shall have the meanings assigned to them in
the Escrow and Paying Agent Agreement.

            This Escrow Receipt is issued under and is subject to the terms,
provisions and conditions of the Escrow and Paying Agent Agreement. By virtue of
its acceptance hereof the holder of this Escrow Receipt assents and agrees to be
bound by the provisions of the Escrow and Paying Agent Agreement and this Escrow
Receipt.

            This Escrow Receipt represents a fractional undivided interest in
amounts deposited from time to time in the Paying Agent Account, and grants or
represents no rights, benefits or interests of any kind in respect of any assets
or property other than such amounts. This Escrow Receipt evidences the same
percentage interest in the Account Amounts as the Fractional Undivided Interest
in the Pass Through Trust evidenced by the Certificate to which this Escrow
Receipt is affixed.

            All payments and distributions made to Receiptholders in respect of
the Escrow Receipt shall be made only from Account Amounts deposited in the
Paying Agent Account. The holder of this Escrow Receipt, by its acceptance of
this Escrow Receipt, agrees that it will look solely to the Account Amounts for
any payment or distribution due to it pursuant to this Escrow Receipt and that
it will not have any recourse to Northwest, the Pass Through Trustee, the Paying
Agent or the Escrow Agent, except as expressly provided herein or in the Pass
Through Trust Agreement. No Receiptholder of this Escrow Receipt shall have any
right to vote or in any manner otherwise control the operation and management of
the Paying Agent Account, nor shall anything set forth herein, or contained in
the terms of this Escrow Receipt, be construed so as to constitute the
Receiptholders from time to time as partners or members of an association.

            This Escrow Receipt may not be assigned or transferred except in
connection with the assignment or transfer of the Certificate to which this
Escrow Receipt is affixed. After payment to the holder hereof of its Escrow
Interest in the Final Distribution, upon the request of

<PAGE>

                                                                               2


the Pass Through Trustee, the holder hereof will return this Escrow Receipt to
the Pass Through Trustee.

            The Paying Agent may treat the person in whose name the Certificate
to which this Escrow Receipt is attached as the owner hereof for all purposes,
and the Paying Agent shall not be affected by any notice to the contrary.

            THIS ESCROW RECEIPT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK.

            IN WITNESS WHEREOF, the Escrow Agent has caused this Escrow Receipt
to be duly executed.

Dated:  June 25, 1999

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

<PAGE>

                                                                       EXHIBIT B

                            Withdrawal Certificate
                                   (Class C)

First Security Bank, National Association,
as Escrow Agent
79 South Main Street
Salt Lake City, UT 84111
Attention: Corporate Trust Services
Telecopier: (801) 246-5053

Ladies and Gentlemen:

            Reference is made to the Escrow and Paying Agent Agreement (Class C)
dated as of June 25, 1999 (the "Agreement"). We hereby certify to you that the
conditions to the obligations of the undersigned to execute a Participation
Agreement pursuant to the Note Purchase Agreement have been satisfied. Pursuant
to Section 1.2(c) of the Agreement, please execute the attached Notice of
Withdrawal and immediately transmit by facsimile to the Depositary, at (312)
606-8428.

                                Very truly yours,

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual capacity but
                                solely as Pass Through Trustee

                                By:
                                   ---------------------------------------------
                                      Name:
                                      Title:

Dated:  _________, ____

<PAGE>

                          NOTICE OF PURCHASE WITHDRAWAL

ABN AMRO Bank N.V., Chicago Branch
135 S. LaSalle Street, Suite 611
Chicago, IL  60674-9135
Attention:  Claudia Heldring
Telecopier:  (312) 606-8428

Ladies and Gentlemen:

            Reference is made to the Deposit Agreement (Class C) dated as of
June 25, 1999 (the "Deposit Agreement") between First Security Bank, National
Association, as Escrow Agent, and ABN AMRO Bank N.V., Chicago Branch, as
Depositary (the "Depositary").

            In accordance with Section 2.3(a) of the Deposit Agreement, the
undersigned hereby requests the withdrawal of the entire amount of the Deposit,
$_________, Account No. __________.

            The undersigned hereby directs the Depositary to pay the proceeds of
the Deposit to ________________, Account No. ___________, Reference: ___________
on __________, _____, upon the telephonic request of a representative of the
Pass Through Trustee.

                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By:
                                   ---------------------------------------
                                     Name:
                                     Title:

Dated:  ___________, ____



                                                                    EXHIBIT 4(g)

                                                                [EXECUTION COPY]

                             NOTE PURCHASE AGREEMENT

                            Dated as of June 25, 1999

                                      Among

                            NORTHWEST AIRLINES, INC.,

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,
     as Pass Through Trustee under each of the Pass Through Trust Agreements

                      STATE STREET BANK AND TRUST COMPANY,
                             as Subordination Agent

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                                 as Escrow Agent

                                       and

                      STATE STREET BANK AND TRUST COMPANY,
                                 as Paying Agent

<PAGE>

                       INDEX TO NOTE PURCHASE AGREEMENT

                                                                          Page

Section 1.  Definitions......................................................2
Section 2.  Financing of New Aircraft........................................2
Section 3.  Conditions Precedent.............................................6
Section 4.  Representations and Warranties...................................6
Section 5.  Covenants........................................................9
Section 6.  Notices.........................................................10
Section 7.  Expenses........................................................10
Section 8.  Further Assurances..............................................11
Section 9.  Miscellaneous...................................................11
Section 10.  Indemnity......................................................12
Section 11.  Termination....................................................15
Section 12.  Governing Law..................................................15

                                   SCHEDULES

Schedule I        New Aircraft and Scheduled Closing Months
Schedule II       Trust Supplements
Schedule III      Deposit Agreements
Schedule IV       Escrow and Paying Agent Agreements
Schedule V        Mandatory Document Terms
Schedule VI       Mandatory Economic Terms
Schedule VII      Aggregate Amortization Schedule

                                     ANNEX

Annex A     Definitions

                                   EXHIBITS

Exhibit A-1       Form of Leased Aircraft Participation Agreement
Exhibit A-2       Form of Lease
Exhibit A-3       Form of Leased Aircraft Indenture
Exhibit A-4       Form of Aircraft Purchase Agreement Assignment
Exhibit A-5       Form of Leased Aircraft Trust Agreement
Exhibit A-6       Form of Leased Aircraft Guarantee
Exhibit B         Form of Closing Notice
Exhibit C-1       Form of Owned Aircraft Participation Agreement
Exhibit C-2       Form of Owned Aircraft Indenture
Exhibit C-3       Form of Owned Aircraft Guarantee


                                      i

<PAGE>

                            NOTE PURCHASE AGREEMENT

            This NOTE PURCHASE AGREEMENT, dated as of June 25, 1999, among (i)
Northwest Airlines, Inc., a Minnesota corporation (the "Company"), (ii) State
Street Bank and Trust Company of Connecticut, National Association, a national
banking association, not in its individual capacity except as otherwise
expressly provided herein, but solely as trustee (in such capacity together with
its successors in such capacity, the "Pass Through Trustee") under each of the
three separate Pass Through Trust Agreements (as defined below), (iii) State
Street Bank and Trust Company, a Massachusetts trust company, as subordination
agent and trustee (in such capacity together with its successors in such
capacity, the "Subordination Agent") under the Intercreditor Agreement (as
defined below), (iv) First Security Bank, National Association, a national
banking association, as Escrow Agent (in such capacity together with its
successors in such capacity, the "Escrow Agent"), under each of the Escrow and
Paying Agent Agreements (as defined below) and (v) State Street Bank and Trust
Company, a Massachusetts trust company, as Paying Agent (in such capacity
together with its successors in such capacity, the "Paying Agent") under each of
the Escrow and Paying Agent Agreements.

                             W I T N E S S E T H:

            WHEREAS, Northwest Airlines, Inc. has obtained commitments from the
Seller pursuant to the Aircraft Purchase Agreement for the delivery of the
twenty-one (21) aircraft listed in Schedule I hereto (together with any aircraft
substituted therefor in accordance with the Aircraft Purchase Agreement prior to
the delivery thereof, the "New Aircraft");

            WHEREAS, pursuant to the Basic Pass Through Trust Agreement and each
of the Trust Supplements set forth in Schedule II hereto, and concurrently with
the execution and delivery of this Agreement, separate grantor trusts
(collectively, the "Pass Through Trusts" and, individually, a "Pass Through
Trust") have been created to facilitate certain of the transactions contemplated
hereby, including, without limitation, the issuance and sale of pass through
certificates pursuant thereto (collectively, the "Certificates") to provide for
a portion of the financing of the Aircraft;

            WHEREAS, the Company has entered into the Underwriting Agreement
dated as of June 18, 1999 (the "Underwriting Agreement") with the several
underwriters (the "Underwriters") named therein, which provides that the Company
will cause the Pass Through Trustee of each of the Class A Trust, the Class B
Trust and the Class C Trust to issue and sell the Class A Certificates, the
Class B Certificates and the Class C Certificates to the Underwriters;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, (i) the Escrow Agents and the Depositaries entered into the Deposit
Agreements set forth in Schedule III hereto (the "Deposit Agreements") whereby
the applicable Escrow Agent agreed to direct the Underwriters to make certain
deposits referred to therein on the Issuance Date (the "Initial Deposits") and
to permit the applicable Pass Through Trustee to make additional deposits from
time to time thereafter (the Initial Deposits together with such additional
deposits are collectively referred to as the "Deposits") and (ii) the Pass
Through Trustees, the Underwriters, the Paying Agents and the Escrow Agents
entered into the Escrow and Paying Agent Agreements


<PAGE>

set forth in Schedule IV hereto (the "Escrow and Paying Agent Agreements")
whereby, among other things, (a) the applicable Escrow Agents have directed the
Underwriters, and the Underwriters agreed to deliver an amount equal to the
amount of the Initial Deposits to the applicable Depositary on behalf of the
applicable Escrow Agent and (b) the applicable Escrow Agent, upon the applicable
Depositary receiving such amount, has agreed to deliver escrow receipts to be
affixed to each Certificate;

            WHEREAS, the Company will determine whether to enter into a
leveraged lease transaction as lessee with respect to such New Aircraft (a
"Leased Aircraft") or to issue secured equipment notes in order to finance such
New Aircraft (an "Owned Aircraft") and will give to the Pass Through Trustee a
Closing Notice (as defined below) specifying its election;

            WHEREAS, upon receipt of a Closing Notice with respect to a New
Aircraft, subject to the terms and conditions of this Agreement, the applicable
Pass Through Trustees will enter into the applicable Financing Agreements
relating to such New Aircraft;

            WHEREAS, on the Closing Date under the applicable Financing
Agreements, each Pass Through Trustee will fund its purchase of Equipment Notes
with the proceeds of one or more Deposits withdrawn by the applicable Escrow
Agent under the related Deposit Agreement bearing the same interest rate as the
Certificates issued by such Pass Through Trust; and

            WHEREAS, concurrently with the execution and delivery of this
Agreement, (i) Citibank, N.A., a national banking association (the "Liquidity
Provider"), has entered into three (3) revolving credit agreements (each, a
"Liquidity Facility"), one each for the benefit of the Certificate Holders of
each Pass Through Trust, with the Subordination Agent, as agent for the Pass
Through Trustee on behalf of each such Pass Through Trust and (ii) the Pass
Through Trustee, the Liquidity Provider and the Subordination Agent have entered
into the Intercreditor Agreement, dated as of the date hereof (the
"Intercreditor Agreement").

            NOW, THEREFORE, in consideration of the foregoing premises and the
mutual agreements herein contained and other good and valuable consideration,
the receipt and adequacy of which are hereby acknowledged, the parties hereto
agree as follows:

            Section 1. Definitions. Capitalized terms used but not defined
herein shall have the respective meanings set forth or incorporated by reference
in Annex A.

            Section 2. Financing of New Aircraft. (a) The Company confirms that
it has entered into the Aircraft Purchase Agreement with the Seller pursuant to
which it has agreed to purchase, and the Seller has agreed to deliver, the New
Aircraft in the months specified in Schedule I hereto, all on and subject to
terms and conditions specified in the Aircraft Purchase Agreement. The Company
agrees to finance the New Aircraft in the manner provided herein, all on and
subject to the terms and conditions hereof and of the relevant Financing
Agreements.

            (b) In furtherance of the foregoing, the Company agrees to give the
parties hereto, each Depositary and each of the Rating Agencies not less than
two (2) Business Days'


                                      2

<PAGE>

prior notice (a "Closing Notice") of the scheduled closing date (the "Scheduled
Closing Date") (or, in the case of a Substitute Closing Notice under Section
2(f) or (g) hereof, one (1) Business Day's prior notice) of a financing in
respect of each New Aircraft, which notice shall:

            i. specify whether the Company has elected to treat such New
      Aircraft as a Leased Aircraft or an Owned Aircraft;

            ii. specify the Scheduled Closing Date on which the financing
      therefor in the manner provided herein shall be consummated;

            iii. instruct the Pass Through Trustees to instruct each Escrow
      Agent to provide a Notice of Purchase Withdrawal to the Depositary with
      respect to the Equipment Notes to be issued in connection with the
      financing of such New Aircraft;

            iv. instruct the Pass Through Trustees to enter into the
      Participation Agreement with respect to such Aircraft in such form and at
      such a time on or before the Scheduled Closing Date specified in such
      Closing Notice and to perform its obligations thereunder;

            v. specify the aggregate principal amount of each series of
      Equipment Notes to be issued, and purchased by the Pass Through Trustees,
      in connection with the financing of such New Aircraft on such Scheduled
      Closing Date (which shall in all respects comply with the Mandatory
      Economic Terms); and

            vi. if such New Aircraft is to be a Leased Aircraft, certify that
      the related Owner Participant (A) is not an Affiliate of the Company and
      (B) based on the representations of such Owner Participant, is either (1)
      a Qualified Owner Participant or (2) any other person the obligations of
      which under the Owner Participant Documents (as defined in the applicable
      Participation Agreement) are guaranteed by a Qualified Owner Participant.

            Notwithstanding the foregoing, in the event the Scheduled Closing
Date for any Aircraft to be financed pursuant to the terms hereof is on or
within 3 business days following the date of issuance of the Certificates, the
Closing Notice therefor may be delivered to the parties hereto on such Scheduled
Closing Date.

            (c) Upon receipt of a Closing Notice, the Pass Through Trustees
shall, and shall cause the Subordination Agent to, enter into and perform their
obligations under the Participation Agreement specified in such Closing Notice,
provided, however, that such Participation Agreement and the other Financing
Agreements to be entered into pursuant to such Participation Agreement shall be
in the forms thereof annexed hereto in all material respects with such changes
therein as shall have been requested by the related Owner Participant (in the
case of Lease Financing Agreements), agreed to by the Company and, if modified
in any material respect, as to which Rating Agency Confirmation shall have been
obtained from each Rating Agency by the Company (to be delivered by the Company
to the applicable Pass Through Trustee on or before the relevant Closing Date,
it being understood that if Rating Agency Confirmation


                                      3

<PAGE>

shall have been received with respect to any Financing Agreements and such
Financing Agreements are utilized for subsequent New Aircraft (or Substitute
Aircraft) without material modifications, no additional Rating Agency
Confirmation shall be required); provided, however, that the relevant Financing
Agreements as executed and delivered shall not vary the Mandatory Economic Terms
and shall contain the Mandatory Document Terms (as such Mandatory Document Terms
may be modified in accordance with Schedule V hereto). Notwithstanding the
foregoing, if any Financing Agreement annexed hereto shall not have been
reviewed by either Rating Agency prior to the Issuance Date, then, prior to the
use thereof in connection with the financing of any Aircraft hereunder, the
Company shall obtain from each Rating Agency a confirmation that the use of such
Financing Agreement would not result in (A) a reduction of the rating for any
Class of Certificates below the then current rating for such Class of
Certificates or (B) a withdrawal or suspension of the rating of any Class of
Certificates.

            (d) With respect to each New Aircraft, the Company shall cause (i)
State Street Bank and Trust Company (or such other person that meets the
eligibility requirements to act as loan trustee under the Leased Aircraft
Indenture or Owned Aircraft Indenture) to execute as Loan Trustee the Financing
Agreements relating to such Aircraft to which such Loan Trustee is intended to
be a party and (ii) Northwest Airlines Corporation to execute a Guarantee, and
shall concurrently therewith execute such Financing Agreements to which the
Company is intended to be a party and perform its respective obligations
thereunder. Upon the request of either Rating Agency, the Company shall deliver
or cause to be delivered to each Rating Agency a true and complete copy of each
Financing Agreement relating to the financing of each New Aircraft together with
a true and complete set of the closing documentation (including legal opinions)
delivered to the related Loan Trustee, Subordination Agent and Pass Through
Trustee under the related Participation Agreement.

            (e) If after giving any Closing Notice, there shall be a delay in
the delivery of a New Aircraft, or if on the Scheduled Closing Date of a New
Aircraft the financing thereof in the manner contemplated hereby shall not be
consummated for whatever reason, the Company shall give the parties hereto
prompt notice thereof. Concurrent with the giving of such notice of postponement
or subsequent thereto, the Company shall give the parties hereto a substitute
Closing Notice specifying the date (the "Substitute Closing Date") to which the
applicable financing shall have been rescheduled which shall be a Business Day
before the Cut-Off Date on which the Escrow Agents shall be entitled to withdraw
one or more Deposits under each of the applicable Deposit Agreements to enable
each applicable Pass Through Trustee to fund its purchase of the related
Equipment Notes). Upon receipt of any such notice of postponement, each
applicable Pass Through Trustee shall comply with its obligations under Article
IV of each of the Trust Supplements and thereafter the financing of the relevant
New Aircraft shall take place on the Substitute Closing Date therefor (all on
and subject to the terms and conditions of the relevant Financing Agreements)
unless further postponed as provided herein.

            (f) Anything in this Section 2 to the contrary notwithstanding, the
Company shall have the right at any time on or before the Scheduled Closing Date
of any New Aircraft, and subsequent to its giving a Closing Notice therefor, to
postpone the Scheduled Closing Date of such New Aircraft so as to enable the
Company to change its election to treat such New Aircraft as a Leased Aircraft
or an Owned Aircraft by written notice of such postponement to the other


                                      4

<PAGE>

parties hereto. The Company shall subsequently give the parties hereto a
substitute Closing Notice complying with the provisions of Section 2(b) hereof
and specifying the new Closing Date for such postponed New Aircraft (which shall
be a Business Day occurring before the CutOff Date and on which the Escrow
Agents shall be entitled to withdraw Deposits under each of the applicable
Deposit Agreements sufficient to enable each applicable Pass Through Trustee to
fund its purchase of the related Equipment Notes). In addition the Company shall
have the further right, anything in this Section 2 to the contrary
notwithstanding, to accept delivery of a New Aircraft under the Aircraft
Purchase Agreement on the Closing Date thereof by utilization of bridge
financing of such New Aircraft and thereafter give the parties hereto a Closing
Notice specifying a Closing Date no later than the Cut-Off Date and otherwise
complying with the provisions of Section 2(b) hereof. All other terms and
conditions of this Note Purchase Agreement shall apply to the financing of any
such New Aircraft on the re-scheduled Closing Date therefor except the
re-scheduled Closing Date shall be deemed the Closing Date of such New Aircraft
for all purposes of this Section 2.

            (g) Anything in this Section 2 to the contrary notwithstanding, the
Company shall have the right at any time to convert an Owned Aircraft to a
Leased Aircraft by entering into a sale/leaseback transaction; provided, that,
prior to, or concurrent with, such conversion, the Company must (i) comply with
the conditions set forth in the Leased Aircraft Participation Agreement with
respect to such aircraft and (ii) deliver an opinion of counsel that holders of
Certificates related to such Aircraft will not recognize income, gain or loss
for federal income tax purposes as a result of such conversion and will be
subject to federal income tax on the same amount and in the same manner and at
the same time as would have been the case if such conversion had not occurred
and that the Pass Through Trusts will not be subject to federal income tax as a
result of such conversion. If the delivery date for any New Aircraft under the
Aircraft Purchase Agreement is delayed for more than 30 days beyond the month
scheduled for delivery or beyond the Cut-Off Date, the Company may identify for
delivery a substitute aircraft therefor meeting the following conditions
(together with the substitute aircraft referred to in the next sentence, a
"Substitute Aircraft"): (i) a Substitute Aircraft must be an Airbus Model A319
or A320 aircraft delivered by the Seller to the Company after the date of this
Agreement, (ii) the Substitute Aircraft must have been manufactured after the
Issuance Date and (iii) the Company shall be obligated to obtain Rating Agency
Confirmation in respect of the replacement of any New Aircraft by Substitute
Aircraft. Upon the satisfaction of the conditions set forth above with respect
to a Substitute Aircraft, the New Aircraft to be replaced shall cease to be
subject to this Agreement and all rights and obligations of the parties hereto
concerning such New Aircraft shall cease, and such Substitute Aircraft shall
become and thereafter be subject to the terms and conditions of this Agreement
to the same extent as such New Aircraft.

            (h) The Company shall have no liability for the failure of the Pass
Through Trustees to purchase Equipment Notes with respect to any New Aircraft or
Substitute Aircraft, other than the Company's obligation, if any, to pay the
Deposit Make-Whole Amount pursuant to Section 5(a)(i) of this Agreement.

            (i) The parties agree that if, in connection with the delivery of a
New Aircraft or a Substitute Aircraft or the conversion of an Owned Aircraft to
a Leased Aircraft, any Owner Participant who is to be a party to any Lease
Financing Agreements shall not be a "citizen of the


                                      5

<PAGE>

United States" within the meaning of 49 U.S.C. ss. 40102 (a)(15), then the
applicable Lease Financing Agreements shall be modified, consistent with the
Mandatory Document Terms (as such Mandatory Document Terms may be modified in
accordance with Schedule V hereto), to require such Owner Participant to enter
into a voting trust, voting powers or similar arrangement satisfactory to the
Company that (A) enables such New Aircraft or Substitute Aircraft to be
registered in the United States and (B) complies with the FAA regulations issued
under the Act applicable thereto.

            (j) Anything herein to the contrary notwithstanding, the Company
shall not have the right, and shall not be entitled, at any time to request the
issuance of Equipment Notes of any series to any Pass Through Trustee in an
aggregate principal amount in excess of the amount of the Deposits then
available for withdrawal by the Escrow Agent under and in accordance with the
provisions of the related Deposit Agreement.

            Section 3. Conditions Precedent. The obligation of the Pass Through
Trustees to enter into, and to cause the Subordination Agent to enter into, any
Participation Agreement as directed pursuant to a Closing Notice and to perform
its obligations under such Participation Agreement is subject to satisfaction of
the following conditions:

            (a) no Triggering Event shall have occurred;

            (b) the Company shall have delivered a certificate to each such Pass
Through Trustee and each Liquidity Provider stating that (i) such Participation
Agreement and the other Financing Agreements to be entered into pursuant to such
Participation Agreement do not vary the Mandatory Economic Terms and contain the
Mandatory Document Terms (as such Mandatory Document Terms may be modified in
accordance with Schedule V hereto) and (ii) any substantive modification of such
Financing Agreements from the forms thereof attached to this Agreement do not
materially and adversely affect the Certificate Holders, and such certification
shall be true and correct; and

            (c) if required by Section 2(c) and in place of the statement in
clause (ii) of Section 3(b) above, Rating Agency Confirmation from each Rating
Agency.

            Anything herein to the contrary notwithstanding, the obligation of
each Pass Through Trustee to purchase Equipment Notes shall terminate on the
Cut-Off Date.

            Section 4. Representations and Warranties.

            (a) The Company represents and warrants on the date hereof and on
each Closing Date that:

            i. the Company is duly incorporated, validly existing and in good
      standing under the laws of the State of Minnesota and is a "citizen of the
      United States" as defined in 49 U.S.C. ss. 40102 (a)(15), and has the full
      corporate power, authority and legal right under the laws of the State of
      Minnesota to execute and deliver this Agreement and each Financing
      Agreement to which it will be a party and to carry out the obligations of
      the


                                      6

<PAGE>

      Company under this Agreement and each Financing Agreement to which it will
      be a party;

            ii. the execution and delivery by the Company of this Agreement and
      the performance by the Company of its obligations under this Agreement
      have been duly authorized by the Company and will not violate its
      Certificate of Incorporation or by-laws or the provisions of any material
      indenture, mortgage, contract or other agreement to which it is a party or
      by which it is bound; and

            iii. this Agreement constitutes the legal, valid and binding
      obligation of the Company, enforceable against it in accordance with its
      terms, except as the same may be limited by applicable bankruptcy,
      insolvency, reorganization, moratorium or similar laws affecting the
      rights of creditors generally and by general principles of equity, whether
      considered in a proceeding at law or in equity.

            (b) State Street Bank and Trust Company represents and warrants on
the date hereof and on each Closing Date that:

            i. State Street Bank and Trust Company is duly incorporated, validly
      existing and in good standing under the laws of the Commonwealth of
      Massachusetts and is a "citizen of the United States" as defined in 49
      U.S.C. ss. 40102 (a)(15), and has the full corporate power, authority and
      legal right under the laws of the Commonwealth of Massachusetts and the
      United States pertaining to its banking, trust and fiduciary powers to
      execute and deliver this Agreement and each Financing Agreement to which
      it will be a party and to carry out the obligations of State Street Bank
      and Trust Company, in its capacity as Subordination Agent or Paying Agent,
      as the case may be, under this Agreement and each Financing Agreement to
      which it will be a party;

            ii. the execution and delivery by State Street Bank and Trust
      Company, in its capacity as Subordination Agent or Paying Agent, as the
      case may be, of this Agreement and the performance by State Street Bank
      and Trust Company, in its capacity as Subordination Agent or Paying Agent,
      as the case may be, of its obligations under this Agreement have been duly
      authorized by State Street Bank and Trust Company, in its capacity as
      Subordination Agent or Paying Agent, as the case may be, and will not
      violate its articles of association or by-laws or the provisions of any
      indenture, mortgage, contract or other agreement to which it is a party or
      by which it is bound; and

            iii. this Agreement constitutes the legal, valid and binding
      obligation of State Street Bank and Trust Company in its capacity as
      Subordination Agent or Paying Agent, as the case may be, enforceable
      against it in accordance with its terms, except as the same may be limited
      by applicable bankruptcy, insolvency, reorganization, moratorium or
      similar laws affecting the rights of creditors generally and by general
      principles of equity, whether considered in a proceeding at law or in
      equity.


                                      7

<PAGE>

            (c) The Pass Through Trustee hereby confirms to each of the other
parties hereto that its representations and warranties set forth in Section 7.14
of the Basic Pass Through Trust Agreement are true and correct as of the date
hereof.

            (d) The Subordination Agent represents and warrants that:

            i. the Subordination Agent is duly incorporated, validly existing
      and in good standing under the laws of the Commonwealth of Massachusetts,
      and has the full corporate power, authority and legal right under the laws
      of the Commonwealth of Massachusetts and the United States pertaining to
      its banking, trust and fiduciary powers to execute and deliver this
      Agreement and each Financing Agreement to which it is or will be a party
      and to perform its obligations under this Agreement and each Financing
      Agreement to which it is or will be a party;

            ii. this Agreement has been duly authorized, executed and delivered
      by the Subordination Agent; this Agreement constitutes the legal, valid
      and binding obligations of the Subordination Agent enforceable against it
      in accordance with its terms, except as the same may be limited by
      applicable bankruptcy, insolvency reorganization, moratorium or similar
      laws affecting the rights of creditors generally and by general principles
      of equity, whether considered in a proceeding at law or in equity;

            iii. none of the execution, delivery and performance by the
      Subordination Agent of this Agreement contravenes any law, rule or
      regulation of the Commonwealth of Massachusetts or any United States
      governmental authority or agency regulating the Subordination Agent's
      banking, trust or fiduciary powers or any judgment or order applicable to
      or binding on the Subordination Agent and do not contravene the
      Subordination Agent's articles of association or by-laws or result in any
      breach of, or constitute a default under, any Agreement or instrument to
      which the Subordination Agent is a party or by which it or any of its
      properties may be bound;

            iv. neither the execution and delivery by the Subordination Agent of
      this Agreement nor the consummation by the Subordination Agent of any of
      the transactions contemplated hereby requires the consent or approval of,
      the giving of notice to, the registration with, or the taking of any other
      action with respect to, any Massachusetts governmental authority or agency
      or any federal Governmental authority or agency regulating the
      Subordination Agent's banking, trust or fiduciary powers;

            v. there are no Taxes Payable by the Subordination Agent imposed by
      the Commonwealth of Massachusetts or any political subdivision or taxing
      authority thereof in connection with the execution, delivery and
      performance by the Subordination Agent of this Agreement (other than
      franchise or other taxes based on or measured by any fees or compensation
      received by the Subordination Agent for services rendered in connection
      with the transactions contemplated by the Intercreditor Agreement or any
      of the Liquidity Facilities), and there are no Taxes payable by the
      Subordination Agent imposed by the Commonwealth of Massachusetts or any
      political subdivision thereof in connection with the acquisition,
      possession or ownership by the Subordination Agent of any of the


                                      8

<PAGE>

      Equipment Notes (other than franchise or other taxes based on or measured
      by any fees or compensation received by the Subordination Agent for
      services rendered in connection with the transactions contemplated by the
      Intercreditor Agreement or any of the Liquidity Facilities); and

            vi. there are no pending or threatened actions or proceedings
      against the Subordination Agent before any court or administrative agency
      which individually or in the aggregate, if determined adversely to it,
      would materially adversely affect the ability of the Subordination Agent
      to perform its obligations under this Agreement.

            (e) The Escrow Agent represents and warrants that:

            i. the Escrow Agent is a national banking association duly
      organized, validly existing and in good standing under the laws of the
      United States and has the full corporate power, authority and legal right
      under the laws of the United States pertaining to its banking, trust and
      fiduciary powers to execute and deliver this Agreement, each Deposit
      Agreement and each Escrow and Paying Agent Agreement (collectively, the
      "Escrow Agent Agreements") and to carry out the obligations of the Escrow
      Agent under each of the Escrow Agent Agreements;

            ii. the execution and delivery by the Escrow Agent of each of the
      Escrow Agent Agreements and the performance by the Escrow Agent of its
      obligations hereunder and thereunder have been duly authorized by the
      Escrow Agent and will not violate its articles of association or by-laws
      or the provisions of any indenture, mortgage, contract or other agreement
      to which it is a party or by which it is bound; and

            iii. each of the Escrow Agent Agreements constitutes the legal,
      valid and binding obligations of the Escrow Agent enforceable against it
      in accordance with its terms, except as the same may be limited by
      applicable bankruptcy, insolvency, reorganization, moratorium or similar
      laws affecting the rights of creditors generally and by general principles
      of equity, whether considered in a proceeding at law or in equity.

            (f) The Paying Agent represents and warrants that:

            i. the Paying Agent is duly incorporated, validly existing and in
      good standing under the laws of the Commonwealth of Massachusetts and has
      the full corporate power, authority and legal right under the laws of the
      United States pertaining to its banking, trust and fiduciary powers to
      execute and deliver this Agreement and each Escrow and Paying Agent
      Agreement (collectively, the "Paying Agent Agreements") and to carry out
      the obligations of the Paying Agent under each of the Paying Agent
      Agreements;

            ii. the execution and delivery by the Paying Agent of each of the
      Paying Agent Agreements and the performance by the Paying Agent of its
      obligations hereunder and thereunder have been duly authorized by the
      Paying Agent and will not violate its


                                      9

<PAGE>

      articles of association or by-laws or the provisions of any indenture,
      mortgage, contract or other agreement to which it is a party or by which
      it is bound; and

            iii. each of the Paying Agent Agreements constitutes the legal,
      valid and binding obligations of the Paying Agent enforceable against it
      in accordance with its terms, except as the same may be limited by
      applicable bankruptcy, insolvency, reorganization, moratorium or similar
      laws affecting the rights of creditors generally and by general principles
      of equity, whether considered in a proceeding at law or in equity.

            (g) State Street Bank and Trust Company of Connecticut, National
Association represents and warrants on the date hereof and on each Closing Date
that:

            i. State Street Bank and Trust Company of Connecticut, National
      Association is a national association validly existing and in good
      standing with the Comptroller of the Currency under the laws of the United
      States and is a "citizen of the United States" as defined in 49 U.S.C. ss.
      40102 (a)(15), and has the full power, authority and legal right under the
      laws of the United States pertaining to its banking, trust and fiduciary
      powers to execute and deliver this Agreement and each Financing Agreement
      to which it will be a party and to carry out the obligations of State
      Street Bank and Trust Company of Connecticut, National Association, in its
      capacity as Pass Through Trustee under this Agreement and each Financing
      Agreement to which it will be a party;

            ii. the execution and delivery by State Street Bank and Trust
      Company of Connecticut, National Association, in its capacity as Pass
      Through Trustee under this Agreement and the performance by State Street
      Bank and Trust Company of Connecticut, National Association, in its
      capacity as Pass Through Trustee, of its obligations under this Agreement
      have been duly authorized by State Street Bank and Trust Company of
      Connecticut, National Association, in its capacity as Pass Through Trustee
      and will not violate its articles of association or by-laws or the
      provisions of any indenture, mortgage, contract or other agreement to
      which it is a party or by which it is bound; and

            iii. this Agreement constitutes the legal, valid and binding
      obligation of State Street Bank and Trust Company of Connecticut, National
      Association in its capacity as Pass Through Trustee enforceable against it
      in accordance with its terms, except as the same may be limited by
      applicable bankruptcy, insolvency, reorganization, moratorium or similar
      laws affecting the rights of creditors generally and by general principles
      of equity, whether considered in a proceeding at law or in equity.

            Section 5. Covenants. (a) The Company covenants with each of the
other parties hereto that:

            i. on the date that the Depositary is obligated to pay the amount of
      the Final Withdrawal to the Paying Agent pursuant to a Deposit Agreement
      relating to any Trust, the Company shall pay to the Pass Through Trustee
      of such Trust no later than 1:00 p.m. (New York time) an amount equal to
      the Deposit Make-Whole Amount, if any, required to be paid in respect of
      such Final Withdrawal amount;


                                      10

<PAGE>

            ii. subject to Section 5(a)(iv) of this Agreement, the Company shall
      at all times maintain its corporate existence and shall not wind up,
      liquidate or dissolve or take any action, or fail to take any action, that
      would have the effect of any of the foregoing;

            iii. the Company shall at all times remain a U.S. Air Carrier (as
      defined in the Financing Agreements) and shall at all times be otherwise
      certificated and registered to the extent necessary to entitle (i) in the
      case of Leased Aircraft, the Owner Trustee (and the Indenture Trustee as
      assignee of the Owner Trustee's rights under each Lease) to the rights
      afforded to lessors of aircraft equipment under Section 1110 and (ii) in
      the case of Owned Aircraft, the Indenture Trustee to the rights afforded
      to secured parties of aircraft equipment under Section 1110;

            iv. Section 8(y) of each Participation Agreement is hereby
      incorporated by reference herein; and

            v. the Company shall not issue Series D Equipment Notes pursuant to
      any Indenture, unless it shall have received Rating Agency Confirmation.
      If Series D Equipment Notes are initially issued to other than the pass
      through trustee for the Class D Certificates, the Company will cause such
      Series D Equipment notes to be subject to the provisions of the
      Intercreditor Agreement that allow the "Controlling Party" (as defined in
      the Intercreditor Agreement), during the continuance of an "Indenture
      Default" (as defined in the Intercreditor Agreement), to direct the Loan
      Trustee in taking action under the applicable Indenture.

            (b) State Street Bank and Trust Company, in its individual capacity,
covenants with each of the other parties to this Agreement that it will,
immediately upon obtaining knowledge of any facts that would cast doubt upon its
continuing status as a "citizen of the United States" as defined in 49 U.S.C.
ss. 40102(a)(15) and promptly upon public disclosure of negotiations in respect
of any transaction which would or might adversely affect such status, notify in
writing all parties hereto of all relevant matters in connection therewith. Upon
State Street Bank and Trust Company giving any such notice, State Street Bank
and Trust Company shall, subject to Section 9.01 of any Indenture then entered
into, resign as Trustee in respect of such Indenture.

            Section 6. Notices. Unless otherwise specifically provided herein,
all notices required or permitted by the terms of this Agreement shall be in
English and in writing, and any such notice shall become effective upon being
delivered personally or, if promptly confirmed by mail, when dispatched by
facsimile or other written telecommunication, addressed to such party hereto at
its address or facsimile number set forth below the signature of such party at
the foot of this Agreement.

            Section 7. Expenses. (a) The Company agrees to pay to the
Subordination Agent when due an amount or amounts equal to the fees payable to
the Liquidity Provider under Section 2.03 of each Liquidity Facility multiplied
by a fraction the numerator of which shall be the then outstanding aggregate
amount of the Deposits under the Deposit Agreements and the denominator of which
shall be the sum of (x) the then outstanding aggregate principal amount of


                                      11

<PAGE>

the Series A Equipment Notes, Series B Equipment Notes and Series C Equipment
Notes issued under all of the Indentures and (y) the then outstanding aggregate
amount of the Deposits under the Deposit Agreements.

            (b) So long as no Equipment Notes have been issued in respect of any
Aircraft, the Company agrees to pay (i) to the Subordination Agent when due (A)
the amount equal to interest on any Downgrade Advance (other than Applied
Downgrade Advance) payable under Section 3.07 of each Liquidity Facility minus
Investment Earnings while such Downgrade Advance shall be outstanding, (B) the
amount equal to interest on any Non-Extension Advance (other than an Applied
Non-Extension Advance) payable under Section 3.07 of each Liquidity Facility
minus Investment Earnings while such Non-Extension Advance shall be outstanding,
(C) any other amounts owed to the Liquidity Provider by the Subordination Agent
as borrower under each Liquidity Facility (other than amounts due as repayment
of advances thereunder or as interest on such advances, except to the extent
payable pursuant to clause (A) or (B)), (ii) all compensation and reimbursement
of expenses, disbursements and advances payable by the Company under the Pass
Through Trust Agreements, (iii) all compensation and reimbursement of expenses
and disbursements payable to the Subordination Agent under the Intercreditor
Agreement except with respect to any income or franchise taxes incurred by the
Subordination Agent in connection with the transactions contemplated by the
Intercreditor Agreement and (iv) in the event the Company requests any amendment
to any Operative Document, all reasonable fees and expenses (including, without
limitation, fees and disbursements of counsel) of the Escrow Agent and/or the
Paying Agent in connection therewith. For purposes of this Section 7(b), (i) the
terms "Applied Non-Extension Advance," "Downgrade Advance" and "NonExtension
Advance" shall have the meanings specified in each Liquidity Facility and (ii)
the term "Investment Earnings" shall have the meaning specified in the
Intercreditor Agreement.

            Section 8. Further Assurances. Each party hereto shall duly execute,
acknowledge and deliver, or shall cause to be executed, acknowledged and
delivered, all such further agreements, instruments, certificates or documents,
and shall do and cause to be done such further acts and things, in any case, as
any other party hereto shall reasonably request in connection with its
administration of, or to carry out more effectually the purposes of, or to
better assure and confirm unto it the rights and benefits to be provided under,
this Agreement.

            Section 9. Miscellaneous. (a) Provided that the transactions
contemplated hereby have been consummated, and except as otherwise provided for
herein, the representations, warranties and agreements herein of the Company,
the Subordination Agent, the Escrow Agent, the Paying Agent and the Pass Through
Trustee, and the Company's, the Subordination Agent's, the Escrow Agent's, the
Paying Agent's and the Pass Through Trustee's obligations under any and all
thereof, shall survive the expiration or other termination of this Agreement and
the other agreements referred to herein.

            (b) This Agreement may be executed in any number of counterparts
(and each of the parties hereto shall not be required to execute the same
counterpart). Each counterpart of this Agreement, including a signature page
executed by each of the parties hereto, shall be an original counterpart of this
Agreement, but all of such counterparts together shall constitute one
instrument. Neither this Agreement nor any of the terms hereof may be
terminated, amended,


                                      12

<PAGE>

supplemented, waived or modified orally, but only by an instrument in writing
signed by the party against which the enforcement of the termination, amendment,
supplement, waiver or modification is sought. The index preceding this Agreement
and the headings of the various Sections of this Agreement are for convenience
of reference only and shall not modify, define, expand or limit any of the terms
or provisions hereof. The terms of this Agreement shall be binding upon, and
shall inure to the benefit of, the Company and its successors and permitted
assigns, the Pass Through Trustee and its successors as Pass Through Trustee
(and any additional trustee appointed) under any of the Pass Through Trust
Agreements, the Escrow Agent and its successors as Escrow Agent under the Escrow
and Paying Agent Agreements, the Paying Agent and its successors as Paying Agent
under the Escrow and Paying Agent Agreement and the Subordination Agent and its
successors as Subordination Agent under the Intercreditor Agreement.

            (c) This Agreement is not intended to, and shall not provide any
person not a party hereto (other than the Underwriters and each of the
beneficiaries of Section 7 hereof) with any rights of any nature whatsoever
against any of the parties hereto, and no person not a party hereto (other than
the Underwriters and each of the beneficiaries of Section 7 hereof) shall have
any right, power or privilege in respect of, or have any benefit or interest
arising out of, this Agreement.

            Section 10. Indemnity. The Company hereby agrees to indemnify each
Indemnitee against, and agrees to protect, defend, save and keep harmless each
thereof from any and all liabilities, obligations, losses, damages, penalties,
claims, actions, suits, out-of-pocket costs, expenses, and disbursements, of
whatsoever kind and nature (collectively called "Expenses") imposed on, incurred
by or asserted against any Indemnitee, in any way relating to or arising out of
(A) any of the Financing Agreements or any lease or sublease of any Aircraft or
the enforcement of any of the terms thereof or any amendment, modification or
waiver in respect thereof, (B) the manufacture, purchase, acceptance or
rejection of the Airframe (as defined in the Participation Agreement) or any
Engine (as defined in the Participation Agreement), (C) the Aircraft (or any
portion thereof or any Engine or engine affixed to the Airframe) whether or not
arising out of the finance, refinance, ownership, delivery, nondelivery,
storage, lease, sublease, sub-sublease, possession, use, non-use, operation,
maintenance, registration, reregistration, condition, modification, alteration,
replacement, repair, substitution, sale, return or other disposition of the
Aircraft (or any portion thereof or any Engine or engine affixed to the
Airframe) including, without limitation, latent or other defects, whether or not
discoverable, strict tort liability and any claim for patent, trademark or
copyright infringement, or (D) the offer, sale or delivery of the Equipment
Notes (the indemnity in this clause (D) to extend also to any person who
controls an Indemnitee within the meaning of Section 15 of the Securities Act of
1933, as amended); provided that the foregoing indemnity as to any Indemnitee
shall not extend to any Expense resulting from or arising out of or which would
not have occurred but for one or more of the following: (A) any representation
or warranty by such Indemnitee (or any of its affiliates) in the Financing
Agreements or in connection therewith being incorrect in any material respect,
or (B) the failure by such Indemnitee (or any of its affiliates) to perform or
observe any agreement, covenant or condition in any of the Financing Agreements
applicable to it (except to the extent such failure was caused directly by the
failure of the Company to perform any obligation under a Financing Agreement),
or (C) the willful misconduct or the gross negligence of such Indemnitee


                                      13

<PAGE>

(or any of its affiliates) other than gross negligence imputed to such
Indemnitee (or any of its affiliates) solely by reason of its interest in the
Aircraft), or (D) any Tax, or (E) the authorization or giving or withholding of
any future amendments, supplements, waivers or consents with respect to any of
the Financing Agreements other than such as have been consented to, approved,
authorized or requested by the Company, or (F) subject to the next succeeding
paragraph, any loss of tax benefits or increase in tax liability under any tax
law whether or not the Company is required to indemnify therefor pursuant to
this Agreement, or (G) any Expense which is specified to be for the account of
an Indemnitee pursuant to any Financing Agreement without express right of
reimbursement under any Financing Agreement. The foregoing indemnity shall not
extend to any Expense to the extent that such Expense is not caused by, or does
not arise out of, an act, omission or event which occurs prior to the payment of
all payments required to be paid by the Company under the Financing Agreements.

            The Company further agrees that any payment or indemnity pursuant to
this Section 10 in respect of any Expenses shall be in an amount which, after
deduction of all Taxes required to be paid by such recipient with respect to
such payment or indemnity under the laws of any Federal, state or local
government or taxing authority in the United States, or under the laws of any
taxing authority or governmental subdivision of a foreign country, or any
territory or possession of the United States or any international authority,
shall be equal to the excess, if any, of (A) the amount of such Expense over (B)
the net reduction in Taxes required to be paid by such recipient resulting from
the accrual or payment of such Expense.

            If, by reason of any Expense payment made to or for the account of
an Indemnitee by the Company pursuant to this Section 10, such Indemnitee
subsequently realizes a tax deduction or credit (including foreign tax credit
and any reduction in Taxes) not previously taken into account in computing such
payment, such Indemnitee shall promptly pay to the Company, but only if the
Company shall have made all payments then due and owing to such Indemnitee under
the Financing Agreements, an amount equal to the sum of (I) the actual reduction
in Taxes realized by such Indemnitee which is attributable to such deduction or
credit, and (II) the actual reduction in Taxes realized by such Indemnitee as a
result of any payment made by such Indemnitee pursuant to this sentence.

            If a claim is made against an Indemnitee involving one or more
Expenses and such Indemnitee has notice thereof, such Indemnitee shall promptly,
upon receiving such notice, give notice of such claim to the Company; provided
that the failure to provide such notice shall not release the Company from any
of its obligations to indemnify hereunder, and no payment by the Company to an
Indemnitee pursuant to this Section 10 shall be deemed to constitute a waiver or
release of any right or remedy which the Company may have against such
Indemnitee for any actual damages as a result of the failure by such Indemnitee
to give the Company such notice. The Company shall be entitled, at its sole cost
and expense, acting through counsel acceptable to the respective Indemnitee, (A)
so long as the Company has agreed in a writing acceptable to such Indemnitee
that the Company is liable to such Indemnitee for such Expense hereunder (unless
such Expense is covered by the proviso to the first paragraph of this Section
10), in any judicial or administrative proceeding that involves solely a claim
for one or more Expenses, to assume responsibility for and control thereof, (B)
so long as the Company has agreed in a writing acceptable to such Indemnitee
that the Company is liable to such Indemnitee for such Expense


                                      14

<PAGE>

hereunder (unless such Expense is covered by the proviso to the first paragraph
of this Section 10), in any judicial or administrative proceeding involving a
claim for one or more Expenses and other claims related or unrelated to the
transactions contemplated by the Financing Agreements, to assume responsibility
for and control of such claim for Expenses to the extent that the same may be
and is severed from such other claims (and such Indemnitee shall use its best
efforts to obtain such severance), and (C) in any other case, to be consulted by
such Indemnitee with respect to judicial proceedings subject to the control of
such Indemnitee. Notwithstanding any of the foregoing to the contrary, the
Company shall not be entitled to assume responsibility for and control of any
such judicial or administrative proceedings (M) while an event of default shall
have occurred and be continuing under any of the Financing Agreements or (N) if
such proceeding could be in the good faith opinion of such Indemnitee entail any
material risk of criminal liability or present a conflict of interest making
separate representation necessary. The affected Indemnitee may participate at
its own expense and with its own counsel in any judicial proceeding controlled
by the Company pursuant to the preceding provisions.

            The affected Indemnitee shall supply the Company with such
information reasonably requested by the Company as is necessary or advisable for
the Company to control or participate in any proceeding to the extent permitted
by this Section 10. Such Indemnitee shall not enter into a settlement or other
compromise with respect to any Expense without the prior written consent of the
Company, which consent shall not be unreasonably withheld or delayed, unless
such Indemnitee waives its right to be indemnified with respect to such Expense
under this Section 10.

            The Company shall supply the affected Indemnitee with such
information reasonably requested by such Indemnitee as is necessary or advisable
for such Indemnitee to control or participate in any proceeding to the extent
permitted by this Section 10.

            When the Company or the insurers under a policy of insurance
maintained by the Company undertakes the defense of an Indemnitee with respect
to an Expense, no additional legal fees or expenses of such Indemnitee in
connection with the defense of such Indemnitee shall be indemnified hereunder
unless such fees or expenses were incurred at the written request of the Company
or such insurers, provided that no such defense shall be compromised or settled
on a basis that admits any gross negligence or willful misconduct on the part of
such Indemnitee without such Indemnitee's prior consent.

            In the event that the Company shall have paid an amount to an
Indemnitee pursuant to this Section 10, and such Indemnitee subsequently shall
be reimbursed in respect of such indemnified amount from any other Person, such
Indemnitee shall promptly pay to the Company an amount equal to the amount of
such reimbursement (but in no event more than such payment from the Company)
plus any net tax benefit (or minus any net tax detriment) realized by such
Indemnitee as a result of any reimbursement received and payment made by such
Indemnitee pursuant to this sentence, provided that (i) no event of default has
occurred and is continuing under any of the Financing Agreements and (ii) such
Indemnitee shall have no obligation to reimburse the Company if the Company has
not paid such Indemnitee all amounts required pursuant to this Section 10 and
any other amounts then due to such Indemnitee from the Company under any of the
Financing Agreements.


                                      15

<PAGE>

            The Company's obligations under the indemnities provided for in this
Agreement shall be those of a primary obligor, whether or not the Person
indemnified shall also be indemnified with respect to the same matter under the
terms of any other document or instrument, and the Person seeking
indemnification from the Company pursuant to this Section 10 may proceed
directly against the Company without first seeking to enforce any other right of
indemnification.

            Section 11. Termination. This Agreement shall terminate on the
Delivery Period Termination Date; provided, that, the provisions of Sections 7
and 8 hereof shall survive any termination of this Agreement.

            Section 12. Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

                    (This space intentionally left blank.)


                                      16

<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Note
Purchase Agreement to be duly executed by their respective officers thereunto
duly authorized as of the day and year first above written.

                                NORTHWEST AIRLINES, INC.

                                By: /s/ Daniel B. Matthews
                                   ------------------------------
                                   Name: Daniel B. Matthews
                                   Title: Vice President & Assistant Treasurer
                                   Address:

                                   Attention:
                                   Facsimile:

                                STATE STREET BANK AND TRUST
                                COMPANY OF CONNECTICUT, NATIONAL
                                ASSOCIATION, not in its individual capacity,
                                except as otherwise provided herein, but solely
                                as Pass Through Trustee

                                By: /s/ Donald E. Smith
                                    ------------------------------
                                    Name: DONALD E. SMITH
                                    Title: VICE PRESIDENT
                                    Address:

                                    Attention:
                                    Facsimile:


                                       17

<PAGE>

                                STATE STREET BANK AND TRUST COMPANY, not
                                in its individual capacity, except as
                                otherwise provided herein, but solely as
                                Subordination Agent

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT


                                FIRST SECURITY BANK, NATIONAL
                                ASSOCIATION, as Escrow Agent

                                By: /s/ Greg A. Hawley
                                   ---------------------------------------
                                     Name: Greg A. Hawley
                                     Title: Vice President


                                STATE STREET BANK AND TRUST
                                COMPANY, as Paying Agent

                                By: /s/ Donald E. Smith
                                   ---------------------------------------
                                     Name: DONALD E. SMITH
                                     Title: VICE PRESIDENT


                                       18

<PAGE>

                                SCHEDULE I TO
                           NOTE PURCHASE AGREEMENT

                  NEW AIRCRAFT AND SCHEDULED CLOSING MONTHS

- --------------------------------------------------------------------------------
                                               Expected
                          Expected          Manufacturer's         Scheduled
 New Aircraft Type   Registration Number    Serial Number       Delivery Months
- --------------------------------------------------------------------------------
Airbus A320-212            N364NW                0962             March 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N365NW                0964             March 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N366NW                0981            April, 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N367NW                0988            April, 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N368NW                0996             May, 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N369NW                1011             June, 1999*
- --------------------------------------------------------------------------------
Airbus A320-212            N370NW                1037             July, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N301NB                1058            August, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N302NB                1062            August, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N303NB                1071            August, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N304NB                1078           September, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N305NB                1090           September, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N306NB                1091           September, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N307NB                1126           November, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N308NB                1129           November, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N309NB                1131           November, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N310NB                1149           December, 1999
- --------------------------------------------------------------------------------
Airbus A319-113            N311NB                1164            January, 2000
- --------------------------------------------------------------------------------
Airbus A319-113            N312NB                1165            January, 2000
- --------------------------------------------------------------------------------
Airbus A319-113            N313NB                1182           February, 2000
- --------------------------------------------------------------------------------
Airbus A319-113            N314NB                1184           February, 2000
- --------------------------------------------------------------------------------

- --------
* Delivered.

<PAGE>

                                SCHEDULE II TO
                           NOTE PURCHASE AGREEMENT

                              TRUST SUPPLEMENTS

            Trust Supplement, dated as of the Issuance Date, among the Company,
NWA Corp. and the Pass Through Trustee in respect of Northwest Airlines Pass
Through Trust, Series 1999-2A.

            Trust Supplement, dated as of the Issuance Date, among the Company,
NWA Corp. and the Pass Through Trustee in respect of Northwest Airlines Pass
Through Trust, Series 1999-2B.

            Trust Supplement, dated as of the Issuance Date, among the Company,
NWA Corp. and the Pass Through Trustee in respect of Northwest Airlines Pass
Through Trust, Series 1999-2C.

<PAGE>

                               SCHEDULE III TO
                           NOTE PURCHASE AGREEMENT

                              DEPOSIT AGREEMENTS

            Deposit Agreement (Class A), dated as of the Issuance Date, between
the Depositary and the Escrow Agent.

            Deposit Agreement (Class B), dated as of the Issuance Date, between
the Depositary and the Escrow Agent.

            Deposit Agreement (Class C), dated as of the Issuance Date, between
the Depositary and the Escrow Agent.

<PAGE>

                                SCHEDULE IV TO
                           NOTE PURCHASE AGREEMENT

                      ESCROW AND PAYING AGENT AGREEMENTS

            Escrow and Paying Agent Agreement (Class A), dated as of the
Issuance Date, among the Escrow Agent, the Underwriters, the Pass Through
Trustee and the Paying Agent.

            Escrow and Paying Agent Agreement (Class B), dated as of the
Issuance Date, among the Escrow Agent, the Underwriters, the Pass Through
Trustee and the Paying Agent.

            Escrow and Paying Agent Agreement (Class C), dated as of the
Issuance Date, among the Escrow Agent, the Underwriters, the Pass Through
Trustee and the Paying Agent.

<PAGE>

                                SCHEDULE V TO
                           NOTE PURCHASE AGREEMENT

                           MANDATORY DOCUMENT TERMS

            The terms "Trust Indenture Form," "Lease Form" and "Participation
Agreement Form" shall have the respective meanings specified in Schedule VI to
the Note Purchase Agreement.

            1. May not modify in any material adverse respect as regards the
interests of the Note Holders, the Subordination Agent, the Liquidity Provider
or the Indenture Trustee, the Granting Clause of the Trust Indenture Form so as
to deprive the Note Holders of a first priority security interest in and
mortgage lien on the Aircraft and, in the case of a Leased Aircraft Indenture,
the Lease or to eliminate any of the obligations intended to be secured thereby
or otherwise modify in any material adverse respect as regards the interests of
the Note Holders, the Subordination Agent, the Liquidity Provider or the
Indenture Trustee the provisions of Article II or III or Sections 4.02, 4.03,
4.04, 5.02, 5.06, 9.01 or the first sentence of Section 10.11 of the Leased
Aircraft Indenture Form for the Leased Aircraft or Article II or III or Sections
4.01, 4.02, 5.02, 7.06(a), 7.06(b), 10.01, or the first sentence of Section
11.11 of the Owned Aircraft Indenture Form for the Owned Aircraft.

            2. May not modify in any material adverse respect as regards the
interests of the Note Holders, the Subordination Agent, the Liquidity Provider
or the Indenture Trustee the provisions of Section 3(d)(v), Section 3(f),
Section 7(a)(I)(i), clause (6) of the final paragraph of Section 10(a), Section
16, Section 18, the first and third sentences of Section 20 or the penultimate
sentence of Section 24 of the Lease Form or otherwise modify the terms of the
Lease Form so as to deprive the Indenture Trustee of rights expressly granted to
the "Indenture Trustee" therein.

            3. May not modify in any material adverse respect as regards the
interests of the Note Holders, the Subordination Agent, the Liquidity Provider
or the Indenture Trustee the provisions of Section 4(a)(ix)(1), 4(a)(ix)(2),
4(a)(ix)(3), 4(a)(xxiii) to the extent such section requires special counsel for
the Lessee to deliver an opinion relating to Section 1110 of the Bankruptcy
Code, Sections 8(q), 8(cc), 11(b), 12 or the penultimate sentence of Section
15(c), 15(e) or the provisions of Sections 4(a)(xi), 4(a)(xii), 4(a)(xiii),
4(a)(xiv), 4(a)(xv) and 4(a)(xvi) of the Participation Agreement Form so as to
eliminate the requirement to deliver to the Loan Participant or the Indenture
Trustee, as the case may be, the legal opinions to be provided to such Persons
thereunder (recognizing that the lawyers rendering such opinions may be changed)
or the provisions of Section 8(f)(ii)(C) or otherwise modify the terms of the
Participation Agreement Form to deprive the Subordination Agent, the Liquidity
Provider or the Indenture Trustee of any indemnity or right of reimbursement in
its favor for Expenses or Taxes.

            4. May not modify, in any material adverse respect as regards the
interests of the Note Holders, the Subordination Agent, the Liquidity Provider
or the Indenture Trustee, the definition of "Make-Whole Amount" in the Leased
Aircraft Indenture Form (with respect to


                                   Sch. V-1

<PAGE>

Equipment Notes relating to Leased Aircraft) or in Annex A to the Owned Aircraft
Indenture Form (with respect to Equipment Notes relating to Owned Aircraft).

            Notwithstanding the foregoing, any such Mandatory Document Term may
be modified to correct or supplement any such provision which may be defective
or to cure any ambiguity or correct any mistake, provided, however, that any
such action shall not materially adversely affect the interests of the Note
Holders, the Subordination Agent, the Liquidity Provider, the Indenture Trustee
or the Certificate Holders.


                                   Sch. V-2

<PAGE>

                                SCHEDULE VI TO
                           NOTE PURCHASE AGREEMENT

                           MANDATORY ECONOMIC TERMS

                               EQUIPMENT NOTES

Obligor:    Northwest Airlines, Inc. or an Owner Trust

Maximum Principal Amount:

            The principal amount of all the Equipment Notes issued with respect
to an Aircraft shall not exceed the maximum principal amount of Equipment Notes
indicated for each such Aircraft as set forth in the Prospectus Supplement in
"Prospectus Supplement Summary--Equipment Notes and the Aircraft" under the
column "Maximum Principal Amount of Equipment Notes."

            Initial Loan to Aircraft Value (with the value of any Aircraft for
these purposes equal to the value (the "Assumed Appraised Value") for such
Aircraft set forth in the Prospectus Supplement in "Prospectus Supplement
Summary--Equipment Notes and the Aircraft" under the column "Appraised Base
Value"):

            Series A: not in excess of 42.6%
            Series B: not in excess of 56.7%
            Series C: not in excess of 69.0%

            The Loan to Aircraft Value for each series of Equipment Notes issued
in respect of each Aircraft (computed as of the date of the issuance thereof on
the basis of the Assumed Appraised Value of such Aircraft and the Depreciation
Assumption (as defined in the Prospectus Supplement in "Description of the
Equipment Notes - Loan to Value Ratios of Equipment Notes")) will not exceed as
of any Regular Distribution Date thereafter (assuming no default in the payment
of the Equipment Notes) 42.6% in the case of the Series A Equipment Notes and
56.7% in the case of the Series B Equipment Notes and 69.0% in the case of the
Series C Equipment Notes. Initial Average Life (in years) of the Series A
Equipment Notes, the Series B Equipment Notes and the Series C Equipment Notes
on any Aircraft will not extend beyond 14.5 years, 13.0 years and 8.0 years,
respectively, from the Issuance Date.

<PAGE>

                            AVERAGE LIFE (IN YEARS)

            As of the Delivery Period Termination Date, the average life of the
Class A Certificates, the Class B Certificates and the Class C Certificates
shall not be more than 13.5 years, 11.6 years and 7.0 years, respectively, from
the Issuance Date (computed without regard to the acceleration of any Equipment
Notes and after giving effect to any special distribution on the Certificates
thereafter required in respect of unused Deposits).

                       FINAL EXPECTED DISTRIBUTION DATE

            Class A Certificates:  March 1, 2019
            Class B Certificates:  March 1, 2015
            Class C Certificates:  March 1, 2010

Past Due Rate: Debt Rate plus 2% per annum.
Payment Date:  March 1 and September 1, commencing with the first such date
               after the applicable Equipment Notes are issued

Make-Whole Amounts: As provided in Article II of the form of Leased Aircraft
Indenture marked as Exhibit A-3 of the Note Purchase Agreement (the "Leased
Aircraft Indenture Form") or the form of Owned Aircraft Indenture marked as
Exhibit C-2 of the Note Purchase Agreement (the "Owned Aircraft Indenture Form",
together with the Leased Aircraft Indenture Form, the "Trust Indenture Form").

Redemption and Purchase:  As provided in Article II of the Trust Indenture Form.

The original aggregate principal amount of all of the Equipment Notes of each
Series shall not exceed the original aggregate face amount of the Certificates
issued by the corresponding Trust.

The interest rate applicable to each Series of Equipment Notes must be equal to
the rate applicable to the Certificates issued by the corresponding Trust.

All-risk hull           Not less than an amount equal to the stipulated loss
insurance:              value (in the case of a Leased Aircraft) or unpaid
                        principal amount of the related Equipment Notes (in the
                        case of an Owned Aircraft).

                                     LEASE

Term:                   The Basic Lease Term shall expire by its terms on or
                        after final maturity date of the related Series A,
                        Series B or Series C Equipment Notes.

Lease Period Dates:     Each March 1 and September 1, commencing with the first
                        such date after the Lease is entered into, to and
                        including the last such date in the Term.


                                  Sch. VI-2

<PAGE>

Minimum Rent:         Basic Rent (and supplemental rent, if any) due and
                      payable on each Lease Period Date shall be at least
                      sufficient to pay in full, as of such Lease Period Date
                      (assuming timely payment of the related Equipment Notes
                      prior to such Date), the aggregate principal amount of
                      scheduled installments due on the related Equipment
                      Notes outstanding on such Lease Period Date, together
                      with accrued and unpaid interest thereon.

Termination Value     At all times equal to or greater than the then outstanding
and Stipulated        principal amount of the related Equipment Notes together
Loss Value:           with accrued interest thereon.

Minimum Liability     $250,000,000 per occurrence for A319 Aircraft and
Insurance Amount:     $300,000,000 per occurrence for A320 Aircraft..

Past Due Rate:        As set forth in the Lease Form (the "Lease Form") marked
                      as Exhibit A-2 to the Note Purchase Agreement.

                            PARTICIPATION AGREEMENT

            Loan Trustee, Subordination Agent, Liquidity Provider, Pass Through
Trustees and Note Holders shall be indemnified against Expenses and Taxes in a
manner no less favorable to the Loan Trustee, the Subordination Agent, the
Liquidity Provider, the Pass Through Trustees and the Note Holders than that set
forth in Sections 7(b) and 7(c) of the form of the Participation Agreement (the
"Participation Form") marked as Exhibit A-1 to the Note Purchase Agreement for
the Leased Aircraft or as Exhibit C-1 to the Note Purchase Agreement for the
Owned Aircraft.


                                  Sch. VI-3

<PAGE>

                               SCHEDULE VII TO
                           NOTE PURCHASE AGREEMENT

                       AGGREGATE AMORTIZATION SCHEDULE

<TABLE>
<CAPTION>
                                1999-2A Trust      1999-2B Trust       1999-2C Trust
                               Equipment Notes    Equipment Notes     Equipment Notes
                             Scheduled Payments  Scheduled Payments  Scheduled Payments
                                of Principal       of Principal         of Principal

Date                               Class A           Class B             Class C
- ----                         ------------------  ------------------  ------------------
<S>                        <C>                <C>                <C>
March 1, 2000 .........    $     1,770,654.15 $     1,031,044.65 $     1,341,670.41
September 1, 2000 .....          2,665,566.27         582,354.22       3,297,202.58
March 1, 2001 .........          8,376,207.30         741,003.36       3,344,456.71
September 1, 2001 .....          5,492,087.10         247,411.80       8,338,750.40
March 1, 2002 .........          5,492,088.00       1,278,366.78       6,863,768.24
September 1, 2002 .....          5,492,086.65       1,322,714.67         137,404.84
March 1, 2003 .........          5,492,087.55       2,119,736.10       3,199,789.31
September 1, 2003 .....          5,492,088.00       1,541,656.05               0.00
March 1, 2004 .........          5,492,086.65       2,060,624.40       5,675,668.17
September 1, 2004 .....          4,368,904.65       1,226,372.85               0.00
March 1, 2005 .........          4,368,904.20       1,686,229.95      10,093,611.82
September 1, 2005 .....          4,368,904.20       1,226,372.85               0.00
March 1, 2006 .........          4,368,904.20       1,686,229.80      11,207,013.18
September 1, 2006 .....          4,368,903.75       1,226,372.85               0.00
March 1, 2007 .........          4,368,904.65       1,990,495.41      10,829,259.07
September 1, 2007 .....          4,368,904.20       1,226,372.85               0.00
March 1, 2008 .........          4,368,904.20       3,282,688.63       8,913,247.59
September 1, 2008 .....          4,368.903.75       1,226,372.85               0.00
March 1, 2009 .........          4,368,903.75       4,272,181.18      11,343,797.48
September 1, 2009 .....          5,805,002.25       1,629,492.45               0.00
March 1, 2010 .........          5,805,001.35       4,827,000.42      17,374,911.54
September 1, 2010 .....          5,805,001.35       1,629,492.45         161,448.66
March 1, 2011 .........          5,805,002.25       5,297,789.39               0.00
September 1, 2011 .....          5,805,000.90       1,568,029.03               0.00
March 1, 2012 .........          7,306,873.33      12,055,605.09               0.00
September 1, 2012 .....          4,303.126.67               0.00               0.00
March 1, 2013 .........         10,906,559.51      25,914,611.99               0.00
September 1, 2013 .....          6,380,837.09               0.00               0.00
March 1, 2014 .........         17,735,886.57      23,794,786.44               0.00
September 1, 2014 .....            294,595.11               0.00               0.00
March 1, 2015 .........         28,712,814.14       3,166,591.49               0.00
March 1, 2016 .........         28,130,175.73               0.00               0.00
March 1, 2017 .........         53,568,778.00               0.00               0.00
September 1, 2017 .....          5,112,630.12               0.00               0.00
March 1, 2018 .........         47,514,147.72               0.00               0.00
September 1, 2018 .....          4,622,397.81               0.00               0.00
March 1, 2019 .........         10,186,176.88               0.00               0.00

Total .................        343,254,000.00     109,858,000.00     102,122,000.00
</TABLE>


                                  Sch. VI-1

<PAGE>

                                   ANNEX A TO
                             NOTE PURCHASE AGREEMENT

                                   DEFINITIONS

            "Act" means 49 U.S.C. ss.ss. 40101-46507.

            "Affiliate" means, with respect to any person, any other person
directly or indirectly controlling, controlled by or under common control with
such person. For purposes of this definition, "control" means the power,
directly or indirectly, to direct or cause the direction of the management and
policies of such person, whether through the ownership of voting securities or
by contract or otherwise and "controlling," "controlled by" and "under common
control with" have correlative meanings.

            "Aircraft Purchase Agreements" means (i) the A320 Purchase Agreement
dated as of March 29, 1996 and (ii) the A319 Purchase Agreement dated as of
September 19, 1997, in each case between the Company and the Seller (including
all exhibits thereto, together with all letter Agreements entered into that by
their terms constitute part of any such Purchase Agreements).

            "Aircraft Purchase Agreement Assignment" means a Purchase Agreement
Assignment substantially in the form of Exhibit A-4 to the Note Purchase
Agreement.

            "Assumed Amortization Schedule" means Schedule VII to the Note
Purchase Agreement.

            "Average Life Date" means, for any Equipment Note, the date which
follows the time of determination by a period equal to the Remaining Weighted
Average Life of such Equipment Note.

            "Bankruptcy Code" means the United States Bankruptcy Code, 11 U.S.C.
ss.ss. 101 et seq.

            "Basic Pass Through Trust Agreement" means the Pass Through Trust
Agreement, dated as of June 3, 1999, among the Company, Northwest Airlines
Corporation and the Pass Through Trustee, as amended, supplemented, amended or
modified, but does not include any Trust Supplement.

            "Business Day" means any day, other than a Saturday, Sunday or other
day on which commercial banks are authorized or required by law to close in New
York, New York, Minneapolis, Minnesota, Chicago, Illinois, Hartford,
Connecticut, Boston, Massachusetts or Salt Lake City, Utah.

            "Certificate" has the meaning set forth in the recitals to the Note
Purchase Agreement.


                                  Annex A-1

<PAGE>

            "Certificate Holder" means the Person in whose name a Certificate is
registered in the Register.

            "Class" means the class of Certificates issued by each Pass Through
Trust.

            "Class A Certificates" means the Class A Certificates issued by the
Northwest Airlines Pass Through Trust, Series 1999-2A.

            "Class A Trust" means the Northwest Airlines Pass Through Trust,
Series 1999-2A formed pursuant to the Basic Pass Through Trust Agreement and
Class A Trust Supplement.

            "Class B Certificates" means the Class B Certificates issued by the
Northwest Airlines Pass Through Trust, Series 1999-2B.

            "Class B Trust" means the Northwest Airlines Pass Through Trust,
Series 1999-2B formed pursuant to the Basic Pass Through Trust Agreement and
Class B Trust Supplement.

            "Class C Certificates" means the Class C Certificates issued by the
Northwest Airlines Pass Through Trust, Series 1999-2C.

            "Class C Purchase Agreement" has the meaning set forth in the
recitals to the Note Purchase Agreement.

            "Class C Trust" means the Northwest Airlines Pass Through Trust,
Series 1999-2C formed pursuant to the Basic Pass Through Trust Agreement and
Class C Trust Supplement.

            "Class D Certificates" means the certificates, if any, issued by
Northwest Airlines, Inc. and designated Class D certificates, in connection with
a secured financing or leveraged lease transaction relating to an aircraft which
will be used in its operations.

            "Closing Date" means the Business Day on which a closing occurs
under the Financing Agreements.

            "Closing Notice" has the meaning set forth in Section 2(b) hereof.

            "Company" means Northwest Airlines, Inc., a Minnesota corporation.

            "Cut-Off Date" means the earlier of (a) the day after the Delivery
Period Termination Date and (b) the date on which a Triggering Event occurs.

            "Delivery Period Termination Date" means the earlier of (a) May 31,
2000 and (b) the date on which Equipment Notes issued with respect to all of the
New Aircraft have been purchased by the Pass Through Trustees in accordance with
the Note Purchase Agreement.


                                  Annex A-2

<PAGE>

            "Deposit" has the meaning set forth in the recitals to the Note
Purchase Agreement.

            "Deposit Agreement" has the meaning set forth in the recitals to the
Note Purchase Agreement.

            "Deposit Make-Whole Amount" means, with respect to the distribution
of unused Deposits to holders of any Class of Certificates, as of any date of
determination, an amount equal to the excess, if any, of (a) the present value
of the excess of (i) the scheduled payment of principal and interest to maturity
of the Equipment Notes, assuming the maximum principal amount thereof (the
"Maximum Amount") minus the Non-Premium Amount were issued, on each remaining
Regular Distribution Date for such Class under the Assumed Amortization Schedule
over (ii) the scheduled payment of principal and interest to maturity of the
Equipment Notes actually acquired by the Trustee for such Class on each such
Regular Distribution Date, such present value computed by discounting such
excess on a semiannual basis on each Regular Distribution Date (assuming a
360-day year of twelve 30-day months) using a discount rate equal to the
Treasury Yield plus 175 basis points in the case of the Class A Certificates and
212.5 basis points in the case of the Class B Certificates and 240 basis points
in the case of Class C Certificates over (b) the amount of such unused Deposits
to be distributed to the holders of such Certificates, minus the Non-Premium
Amount plus accrued and unpaid interest on such net amount to but excluding the
date of determination from and including the preceding Regular Distribution Date
(or if such date of determination precedes the first Regular Distribution Date,
the Issuance Date).

            "Depositary" means ABN AMRO Bank N.V., Chicago Branch, a banking
institution organized under the laws of The Netherlands.

            "Equipment Notes" means and includes any secured certificates issued
under any Indenture in the form specified in Section 2.01 thereof (as such form
may be varied pursuant to the terms of such Indenture) and any Equipment Note
issued under any Indenture in exchange for or replacement of any other Equipment
Note.

            "Escrow Agent" has the meaning set forth in the first paragraph of
the Note Purchase Agreement.

            "Escrow and Paying Agent Agreement" has the meaning set forth in the
recitals to the Note Purchase Agreement.

            "FAA" means the Federal Aviation Administration of the United
States.

            "Final Withdrawal" with respect to each Escrow and Paying Agent
Agreement, has the meaning set forth in Section 1.2 thereof.

            "Financing Agreements" means, collectively, the Lease Financing
Agreements and the Owner Financing Agreements.


                                  Annex A-3

<PAGE>

            "Government Entity" means (a) any federal, state, provincial or
similar government, and any body, board, department, commission, court,
tribunal, authority, agency or other instrumentality of any such government or
otherwise exercising any executive, legislative, judicial, administrative or
regulatory functions of such government or (b) any other government entity
having jurisdiction over any matter contemplated by the Operative Documents or
relating to the observance or performance of the obligations of any of the
parties to the Operative Documents.

            "Guarantee" means a Guarantee whereby Northwest Airlines Corporation
guarantees (i) the Company's obligations under a Lease (in the case of a Leased
Aircraft) or (ii) the Company's obligations under an Owned Aircraft Indenture
(in the case of an Owned Aircraft).

            "H.15(519)" means the weekly statistical release designated as such,
or any successor publication, published by the Board of Governors of the Federal
Reserve System.

            "Indemnitee" means the Escrow Agent and the Paying Agent.

            "Indentures" means, collectively, the Leased Aircraft Indentures and
the Owned Aircraft Indentures.

            "Initial Deposits" has the meaning set forth in the recitals to the
Note Purchase Agreement.

            "Intercreditor Agreement" has the meaning set forth in the recitals
to the Note Purchase Agreement.

            "Issuance Date" means the date of the original issuance of the
Certificates.

            "Law" means (a) any constitution, treaty, statute, law, decree,
regulation, order, rule or directive of any Government Entity, and (b) any
judicial or administrative interpretation or application of, or decision under,
any of the foregoing.

            "Lease" means a Lease Agreement substantially in the form of Exhibit
A-2 to the Note Purchase Agreement.

            "Lease Financing Agreements" means, collectively, the Aircraft
Purchase Agreement Assignment, the Leased Aircraft Participation Agreement, the
Lease, the Leased Aircraft Indenture, the Equipment Notes issued under the
Leased Aircraft Indenture, the Guarantee and the Trust Agreement relating to the
financing of a Leased Aircraft.

            "Lease Period" has the meaning set forth in the Participation
Agreement.

            "Leased Aircraft" means a New Aircraft subject to a Lease.


                                  Annex A-4

<PAGE>

            "Leased Aircraft Indenture" means a Trust Indenture and Security
Agreement substantially in the form of Exhibit A-3 to the Note Purchase
Agreement.

            "Leased Aircraft Participation Agreement" means a Participation
Agreement substantially in the form of Exhibit A-1 to the Note Purchase
Agreement.

            "Liquidity Facility" has the meaning set forth in the recitals to
the Note Purchase Agreement.

            "Liquidity Provider" has the meaning set forth in the recitals to
the Note Purchase Agreement.

            "Loan Trustee" means the "Indenture Trustee" as defined in the
Financing Agreements.

            "Mandatory Document Terms" means the terms set forth on Schedule V
to the Note Purchase Agreement.

            "Mandatory Economic Terms" means the terms set forth on Schedule VI
to the Note Purchase Agreement.

            "Manufacturer" means The Boeing Company.

            "New Aircraft" has the meaning set forth in the recitals to the Note
Purchase Agreement.

            "Non-Premium Amount" means the amount equal to the sum of unused
Deposits to be distributed (i) due to the failure of an Aircraft to be delivered
prior to the Delivery Period Termination Date due to any reason not occasioned
by the Company's fault or negligence and (ii) in the case of Class C
Certificates, $7.5 million.

            "Note Purchase Agreement" means the Note Purchase Agreement to which
this Annex A is attached.

            "Notice of Purchase Withdrawal" with respect to each Deposit
Agreement, has the meaning set forth in Section 2.3 thereof.

            "NWA Corp." means Northwest Airlines Corporation, a Delaware
corporation.

            "Operative Documents" means, collectively, the Pass Through Trust
Agreements, the Escrow and Paying Agent Agreements, the Deposit Agreements, the
Liquidity Facilities, the Intercreditor Agreement, the Certificates and the
Financing Agreements.

            "Owned Aircraft" means a New Aircraft subject to an Owned Aircraft
Indenture.


                                  Annex A-5

<PAGE>

            "Owned Aircraft Indenture" means a Trust Indenture and Security
Agreement substantially in the form of Exhibit C-2 to the Note Purchase
Agreement.

            "Owned Aircraft Participation Agreement" means a Participation
Agreement substantially in the form of Exhibit C-1 to the Note Purchase
Agreement.

            "Owner Financing Agreements" means, collectively, the Owned Aircraft
Participation Agreement, the Guarantee, the Owned Aircraft Indenture and the
Equipment Notes issued thereunder.

            "Owner Participant" means, with respect to any Leased Aircraft, the
Person named as the Owner Participant in the Participation Agreement with
respect to such Leased Aircraft.

            "Owner Trust" means with respect to any Leased Aircraft, the trust
created by the "Trust Agreement" referred to in the Leased Aircraft Indenture
related thereto.

            "Owner Trustee" means with respect to any Leased Aircraft, the
"Owner Trustee" party to the "Trust Agreement" referred to in the Leased
Aircraft Indenture related thereto

            "Participation Agreements" means, collectively, the Leased Aircraft
Participation Agreements and the Owned Aircraft Participation Agreements.

            "Pass Through Trust" has the meaning set forth in the recitals to
the Note Purchase Agreement.

            "Pass Through Trust Agreement" means each of the three separate
Trust Supplements, together in each case with the Basic Pass Through Trust
Agreement, each dated as of the Issuance Date, by and between the Lessee and
Pass Through Trustee.

            "Pass Through Trustee" has the meaning set forth in the first
paragraph of the Note Purchase Agreement.

            "Paying Agent" has the meaning set forth in the first paragraph of
the Note Purchase Agreement.

            "Person" means any individual, firm, partnership, joint venture,
trust, trustee, Government Entity, organization, association, corporation,
government agency, committee, department, authority and other body, corporate or
incorporate, whether having distinct legal status or not, or any member of any
of the same.

            "Qualified Owner Participant" means a Person which has a tangible
net worth (exclusive of goodwill) greater than $50,000,000.

            "Rating Agencies" means, collectively, at any time, each nationally
recognized rating agency which shall have been requested to rate the
Certificates and which shall then be


                                  Annex A-6

<PAGE>

rating the Certificates. The initial Rating Agencies will be Moody's Investors
Service, Inc. and Standard & Poor's Ratings Services, a division of McGraw-Hill
Inc.

            "Rating Agency Confirmation" means, with respect to any Financing
Agreement that has been modified in any material respect from the forms thereof
attached to the Note Purchase Agreement or with respect to the issuance of Class
D Certificates or Series D Equipment Notes, a written confirmation from each of
the Rating Agencies that the use of such Financing Agreement with such
modifications or the issuance of such Class D Certificates or Series D Equipment
Notes, as the case may be, whichever of the foregoing shall in a particular case
require Rating Agency Confirmation, would not result in (i) a reduction of the
rating for any Class of Certificates below the then current rating for such
class of Certificates or (ii) a withdrawal or suspension of the rating of any
Class of Certificates.

            "Register" means the register maintained pursuant to Sections 3.04
and 7.11 of the Basic Pass Through Trust Agreement with respect to each Pass
Through Trust.

            "Regular Distribution Dates" shall mean March 1 and September 1of
each year, commencing March 1, 2000.

            "Remaining Weighted Average Life" means, on a given date with
respect to any Equipment Note, the number of days equal to the quotient obtained
by dividing (a) the sum of each of the products obtained by multiplying (i) the
amount of each then remaining scheduled payment of principal of such Equipment
Note, including the payment due on the maturity of such Equipment Note by (ii)
the number of payment due on the maturity of such Equipment Note by (ii) the
number days from and including such determination date to but excluding the date
on which such payment of principal is scheduled to be made, by (b) the then
outstanding principal amount of such Equipment Note.

            "Scheduled Closing Date" has the meaning set forth in Section 2(b)
hereof.

            "Section 1110" means 11 U.S.C. ss. 1110 of the Bankruptcy Code or
any successor or analogous Section of the federal bankruptcy law in effect from
time to time.

            "Seller" means AVSA, S.A.R.L.

            "Series A Equipment Notes" means Equipment Notes issued under an
Indenture and designated as "Series A" thereunder.

            "Series B Equipment Notes" means Equipment Notes issued under an
Indenture and designated as "Series B" thereunder.

            "Series C Equipment Notes" means Equipment Notes issued under an
Indenture and designated as "Series C" thereunder.

            "Series D Equipment Notes" means Equipment Notes issued under an
Indenture and designated as "Series D" thereunder.


                                  Annex A-7

<PAGE>

            "Subordination Agent" has the meaning set forth in the first
paragraph of the Note Purchase Agreement.

            "Substitute Aircraft" has the meaning set forth in Section 2(g) of
the Note Purchase Agreement.

            "Substitute Closing Date" has the meaning set forth in Section 2(e)
of the Note Purchase Agreement.

            "Taxes" means all license, recording, documentary, registration and
other similar fees and all taxes, levies, imposts, duties, charges, assessments
or withholdings of any nature whatsoever imposed by any Taxing Authority,
together with any penalties, additions to tax, fines or interest thereon or
additions thereto.

            "Taxing Authority" means any federal, state or local government or
other taxing authority in the United States, any foreign government or any
political subdivision or taxing authority thereof, any international taxing
authority or any territory or possession of the United States or any taxing
authority thereof.

            "Treasury Yield" means, as of any date of determination, with
respect to any Equipment Note (utilizing the Assumed Amortization Schedule
applicable thereto), the interest rate (expressed as a decimal and, in the case
of United States Treasury bills, converted to a bond equivalent yield)
determined to be the per annum rate equal to the semi-annual yield to maturity
for United States Treasury securities maturing on the Average Life Date of such
Equipment Note and trading in the public securities markets either as determined
by interpolation between the most recent weekly average yield to maturity for
two series of United States Treasury securities, trading in the public
securities markets, (A) one maturing as close as possible to, but earlier than,
the Average Life Date of such Equipment Note and (B) the other maturing as close
as possible to, but later than, the Average Life Date of such Equipment Note, in
each case as published in the most recent H.15(519) or, if a weekly average
yield to maturity for United States Treasury securities maturing on the Average
Life Date of such Equipment Note is reported on the most recent H.15(519), such
weekly average yield to maturity as published in such H.15(519).

            "Triggering Event" has the meaning assigned to such term in the
Intercreditor Agreement.

            "Trust Agreement" means a Trust Agreement substantially in the form
of Exhibit A-5 to the Note Purchase Agreement.

            "Trust Supplement" means an agreement supplemental to the Basic Pass
Through Trust Agreement pursuant to which (i) a separate trust is created for
the benefit of the holders of the Certificates of a class, (ii) the issuance of
the Certificates of such class representing fractional undivided interests in
such trust is authorized and (iii) the terms of the Certificates of such class
are established.


                                  Annex A-8

<PAGE>

            "Underwriters" has the meaning set forth in the recitals to the Note
Purchase Agreement.

            "Underwriting Agreement" has the meaning set forth in the recitals
to the Note Purchase Agreement.


                                    Annex A-9



================================================================================

                             PARTICIPATION AGREEMENT
                                   [NW ____ _]

                                   Dated as of
                               [________________]

                                      Among

                            NORTHWEST AIRLINES, INC.,
                                           Lessee,

                         NORTHWEST AIRLINES CORPORATION,
                                           Guarantor,

                     [________________________________],
                                           Owner Participant,

                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION,
                                           Pass Through Trustee under each of
                                           the Pass Through Trust Agreements,

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
          not in its Individual Capacity, except as expressly provided
                      herein, but solely as Owner Trustee,

                      STATE STREET BANK AND TRUST COMPANY,
                                           Subordination Agent,

                                       and

                      STATE STREET BANK AND TRUST COMPANY,
               in its Individual Capacity and as Indenture Trustee

                             -----------------------

                    One Airbus [A320-212] [A319-113] Aircraft
                                    N[_____]
                       Leased to Northwest Airlines, Inc.

================================================================================
<PAGE>

                        INDEX TO PARTICIPATION AGREEMENT

                                                                          Page
                                                                          ----

SECTION 1.    Participations in Lessor's Cost of the Aircraft................3

SECTION 2.    Lessee's Notice of Delivery Date...............................4

SECTION 3.    Instructions to the Owner Trustee..............................4

SECTION 4.    Conditions.....................................................5
              (a) Conditions Precedent to the Participations in the
                    Aircraft.................................................5
              (b) Conditions Precedent to the Obligations of Lessee and
                    the Guarantor...........................................12

SECTION 5.    [Intentionally Omitted].......................................14

SECTION 6.    Extent of Interest of Certificate Holders.....................14

SECTION 7.    Representations and Warranties of Lessee and the
               Guarantor; Indemnities.......................................14
              (a) Representations and Warranties............................14
              (b) General Tax Indemnity.....................................17
              (c) General Indemnity.........................................17
              (d) Income Tax................................................17

SECTION 8.    Representations, Warranties and Covenants.....................18

SECTION 9.    Reliance of Liquidity Provider................................35

SECTION 10.   Other Documents...............................................36

SECTION 11.   Certain Covenants of Lessee...................................36

SECTION 12.   Owner for Federal Tax Purposes................................37

SECTION 13.   Certain Definitions; Notices; Consent to Jurisdiction.........37

SECTION 14.   Change of Situs of Owner Trust................................38

SECTION 15.   Miscellaneous.................................................39

SECTION 16.   Expenses......................................................40

SECTION 17.   Refinancings..................................................40


                                      -i-
<PAGE>

                                    SCHEDULES

SCHEDULE I   -   Names and Addresses

SCHEDULE II  -   Commitments

SCHEDULE III -   Pass Through Trust Agreements

                                    EXHIBITS

Exhibit A    -  Schedule of Countries Authorized for Reregistration

Exhibit B-1  -  Form of Opinion of Simpson Thacher & Bartlett, special
                counsel for the Lessee and the Guarantor

Exhibit B-2  -  Form of Opinion of Cadwalader, Wickersham & Taft, special
                counsel for the Lessee and the Guarantor

Exhibit B-3  -  Form of Opinion of Lessee's Legal Department

Exhibit C    -  Form of Opinion of counsel for the Supplier and the
                Manufacturer

Exhibit D    -  Form of Opinion of Ray, Quinney & Nebeker, special counsel
                for the Owner Trustee

Exhibit E-1  -  Form of Opinion of [___________________], special counsel for
                the Owner Participant

Exhibit E-2  -  Form of Opinion of Owner Participant's in-house counsel

Exhibit F    -  Form of Opinion of Crowe & Dunlevy, P.C.

Exhibit G    -  Form of Opinion of Bingham Dana LLP, special counsel for the
                Indenture Trustee

Exhibit H-1  -  [Intentionally Omitted]

Exhibit H-2  -  [Intentionally Omitted]

Exhibit I    -  Form of ss.1110 Opinion of Cadwalader, Wickersham & Taft,
                special counsel for the Lessee

Exhibit J-1  -  Form of Opinion of Bingham Dana LLP, special counsel for
                the Pass Through Trustee

Exhibit J-2  -  Form of Opinion of Bingham Dana LLP, special counsel for
                the Subordination Agent

Exhibit K    -  Section 7(b) - General Tax Indemnity

Exhibit L    -  Section 7(c) - General Indemnity


                                      -ii-
<PAGE>

                             PARTICIPATION AGREEMENT
                                   [NW ____ _]

            THIS PARTICIPATION AGREEMENT [NW ____ _] dated as of
[_______________], among (i) NORTHWEST AIRLINES, INC., a Minnesota corporation
(the "Lessee"), (ii) NORTHWEST AIRLINES CORPORATION, a Delaware corporation (the
"Guarantor"), (iii) [_________________________], a [__________] corporation (the
"Owner Participant"), (iv) STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
NATIONAL ASSOCIATION, not in its individual capacity except as otherwise
provided herein, but solely as trustee (in such capacity, the "Pass Through
Trustee") under each of [three] separate Pass Through Trust Agreements (as
defined below), (v) FIRST SECURITY BANK, NATIONAL ASSOCIATION, a national
banking association, not in its individual capacity, except as expressly
provided herein, but solely as Owner Trustee under the Trust Agreement (herein,
in such latter capacity, together with any successor owner trustee, called the
"Owner Trustee"), (vi) STATE STREET BANK AND TRUST COMPANY, not in its
individual capacity, but solely as subordination agent and trustee (in such
capacity, the "Subordination Agent") under the Intercreditor Agreement (defined
below), and (vii) STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust
company, in its individual capacity and as Indenture Trustee under the Trust
Indenture (as hereinafter defined) (herein, in such latter capacity together
with any successor indenture trustee, called the "Indenture Trustee");

                              W I T N E S S E T H:

            WHEREAS, pursuant to the Purchase Agreement (as such term is defined
in the Lease hereinafter referred to) between Lessee and the Supplier, the
Supplier has agreed to sell to Lessee, among other things, certain Airbus
Industrie [A320-212] [A319-113] aircraft, including the Aircraft which has been
delivered by the Supplier to Lessee and is the subject of this Agreement;

            WHEREAS, concurrently with the execution and delivery of this
Agreement,

            (i) Lessee and the Owner Trustee are entering into a Purchase
      Agreement Assignment [NW ____ _], dated as of the date hereof (herein
      called the "Purchase Agreement Assignment"), whereby Lessee assigns to the
      Owner Trustee certain rights and interests of Lessee under the Purchase
      Agreement with respect to the Aircraft; and

            (ii) the Manufacturer and the Supplier have executed the
      Manufacturer Consent and Agreement to Assignment of Warranties [NW ____
      __] and the Supplier Consent and Agreement to Assignment of Warranties [NW
      ____ _] (herein collectively called the "Consent and Agreement"),
      substantially in the forms attached to the Purchase Agreement Assignment;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, the Owner Participant is entering into a Trust Agreement [NW ____ _],
dated as of the date hereof (said Trust Agreement, as the same may be amended or
supplemented from time to time, being herein called the "Trust Agreement", such
term to include, unless the context otherwise
<PAGE>

requires, any Trust Supplement referred to below), with the Owner Trustee,
pursuant to which Trust Agreement the Owner Trustee agrees, among other things,
to hold the Trust Estate defined in Section 1.01 thereof (herein called the
"Trust Estate") for the use and benefit of the Owner Participant;

            WHEREAS, the Indenture Trustee and the Owner Trustee concurrently
with the execution and delivery of this Agreement are entering into the Trust
Indenture and Security Agreement [NW ____ _], dated as of the date hereof (said
Trust Indenture and Security Agreement, as the same may be amended or
supplemented from time to time, being herein called the "Trust Indenture", such
term to include, unless the context otherwise requires, the Trust Supplement
referred to below) pursuant to which the Owner Trustee will issue secured
certificates substantially in the form set forth in Section 2.01 thereof (the
"Secured Certificates", and individually, a "Secured Certificate") in three
series, which Secured Certificates are to be secured by the mortgage and
security interests created by the Owner Trustee in favor of the Indenture
Trustee, and the Owner Trustee shall execute and deliver a Trust and Indenture
Supplement substantially in the form of Exhibit A to the Trust Indenture (the
"Trust Supplement") covering the Aircraft, supplementing the Trust Agreement and
the Trust Indenture;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, the Owner Trustee and Lessee have entered into the Lease Agreement
[NW ____ _], dated as of the date hereof (such Lease Agreement, as the same may
be amended or supplemented from time to time to the extent permitted by the
terms thereof and this Agreement, herein called the "Lease", such term to
include, unless the context otherwise requires, the Lease Supplement referred to
below), whereby, subject to the terms and conditions set forth therein, the
Owner Trustee agrees to lease to Lessee, and Lessee agrees to lease from the
Owner Trustee the Aircraft on the date (the "Delivery Date") that the Aircraft
is sold and delivered by Lessee to the Owner Trustee under the Bill of Sale, and
accepted by the Owner Trustee for all purposes of the Lease, such acceptance to
be evidenced by the execution of the Trust Supplement covering the Aircraft, and
such lease to be evidenced by the execution and delivery of a Lease Supplement
covering the Aircraft;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, the Owner Participant is entering into a Tax Indemnity Agreement [NW
____ _], dated as of the date hereof, with Lessee (the "Tax Indemnity
Agreement");

            WHEREAS, concurrently with the execution and delivery of this
Agreement; the Guarantor is entering into a Guarantee [NW ____ _], dated as of
the date hereof, pursuant to which the Guarantor guarantees certain obligations
of Lessee under the Operative Documents (the "Guarantee");

            WHEREAS, pursuant to the Pass Through Trust Agreement and each of
the Pass Through Trust Supplements set forth in Schedule III hereto
(collectively, the "Pass Through Trust Agreements"), on the Issuance Date three
separate trusts (collectively, the "Pass Through Trusts" and, individually, a
"Pass Through Trust") were created to facilitate the transactions contemplated
hereby, including, without limitation, the issuance and sale by each


                                      -2-
<PAGE>

Pass Through Trust of pass through certificates pursuant thereto (collectively,
the "Certificates");

            WHEREAS, the proceeds from the issuance and sale of the Certificates
by each Pass Through Trust will be applied in part by the Pass Through Trustee
on the Delivery Date to purchase from the Owner Trustee, on behalf of each Pass
Through Trust, all of the Secured Certificates bearing the same interest rate as
the Certificates issued by such Pass Through Trust;

            WHEREAS, on the Issuance Date (i) Citibank, N.A. (the "Liquidity
Provider") entered into three revolving credit agreements (each, a "Liquidity
Facility"), one for the benefit of the holders of Certificates of each Pass
Through Trust, with the Subordination Agent, as agent for the Pass Through
Trustee on behalf of each such Pass Through Trust; and (ii) the Pass Through
Trustee, the Liquidity Provider and the Subordination Agent entered into the
Intercreditor Agreement, dated June 25, 1999 (the "Intercreditor Agreement");

            WHEREAS, the Secured Certificates will be held by the Subordination
Agent pursuant to the Intercreditor Agreement on behalf of the Pass Through
Trusts;

            WHEREAS, in order to facilitate the transactions contemplated
hereby, Lessee and the Guarantor have entered into the Underwriting Agreement,
dated as of June 18, 1999, among Lessee, the Guarantor and the several
underwriters named therein (the "Underwriting Agreement"); and

            WHEREAS, certain terms are used herein as defined in Section 13(a)
hereof;

            NOW, THEREFORE, in consideration of the mutual agreements herein
contained, the parties hereto agree as follows:

            SECTION 1. Participations in Lessor's Cost of the Aircraft. (a)
Participation by Pass Through Trustees. Subject to the terms and conditions of
this Agreement, the Pass Through Trustee for each Pass Through Trust agrees to
finance, in part, the Owner Trustee's payment of Lessor's Cost for the Aircraft
by paying to the Owner Trustee the aggregate purchase price of the Secured
Certificates being issued to such Pass Through Trustee as set forth on Schedule
II opposite the name of such Pass Through Trust. The Pass Through Trustees shall
make such payments to the Owner Trustee on a date to be designated pursuant to
Section 2 hereof, but in no event later than [__________], by transferring to
the account of the Owner Trustee at State Street Bank and Trust Company, 225
Franklin Street, Boston, Massachusetts 02110, ABA No. 011-000-028, Account No.
9903-990-1, Reference: Northwest/NW [_____ __], not later than 9:30 a.m., New
York City time, on the Delivery Date in immediately available funds in Dollars,
the amount set forth opposite the name of such Pass Through Trust on Schedule II
hereto.

            Upon the occurrence of the above transfers by the Pass Through
Trustee for each Pass Through Trust to the Owner Trustee, the Owner Trustee, at
the direction of the Owner Participant, shall issue, pursuant to Article II of
the Trust Indenture, to the Subordination Agent on behalf of the Pass Through
Trustee for each of the Pass Through Trusts, Secured Certificates of the
maturity and aggregate principal amount, bearing the interest rate and for the
purchase price set forth on Schedule II hereto opposite the name of such Pass
Through Trust.


                                      -3-
<PAGE>

            (b) Participation by Owner Participant. Subject to the terms and
conditions of this Agreement, the Owner Participant hereby agrees to participate
in the payment of Lessor's Cost for the Aircraft by making an equity investment
in the beneficial ownership of the Aircraft on a date to be designated pursuant
to Section 2 hereof, but in no event later than [__________], by transferring to
the account of the Owner Trustee at State Street Bank and Trust Company, 225
Franklin Street, Boston, Massachusetts 02110, ABA No. 011-000-028, Account No.
9903-990-1, Reference: Northwest/NW [_____ __], not later than 9:30 a.m., New
York City time, on the Delivery Date in immediately available funds in Dollars,
the amount set forth opposite the Owner Participant's name on Schedule II
hereto.

            (c) General Provisions. The amount of the participation of each of
the Pass Through Trustee and the Owner Participant to be made as provided above
in the payment of Lessor's Cost for the Aircraft is hereinafter called such
party's "Commitment" for the Aircraft. In case any of the Pass Through Trustee
or the Owner Participant shall default in its obligation under the provisions of
this Section 1, no other such party shall have any obligation to make any
portion of such defaulted amount available or to increase the amount of its
Commitment and the obligation of such nondefaulting party shall remain subject
to the terms and conditions set forth in this Agreement. Upon receipt by the
Owner Trustee of all amounts to be furnished to it on the Delivery Date pursuant
to this Section 1 and the satisfaction of the conditions set forth in Section 4
hereof, Lessee shall transfer title to and deliver the Aircraft to the Owner
Trustee, and the Owner Trustee shall purchase and take title to and accept
delivery of the Aircraft. In consideration of the transfer of title to and
delivery of the Aircraft to the Owner Trustee, the Owner Trustee shall,
simultaneously with such transfer of title and delivery, pay to Lessee (from the
amounts so furnished it by the Participants) Lessor's Cost for the Aircraft.

            SECTION 2. Lessee's Notice of Delivery Date. Lessee agrees to give
each Participant, the Owner Trustee and the Indenture Trustee at least two
Business Days' telecopy or other written notice of the Delivery Date for the
Aircraft, which Delivery Date shall be a Business Day, which notice shall
specify the amount of Lessor's Cost and the amount of each Participant's
Commitment for the Aircraft. As to each Participant, the making of its
Commitment for the Aircraft available in the manner required by Section 1 shall
constitute a waiver of such notice.

            SECTION 3. Instructions to the Owner Trustee. The Owner Participant
agrees that its releasing the amount of its Commitment for the Aircraft to the
account of the Owner Trustee in accordance with the terms of Section 1 shall
constitute, subject to satisfaction or waiver of the conditions set forth in
Section 4(a), without further act, authorization and direction by the Owner
Participant to the Owner Trustee:

            (i) to pay to Lessee Lessor's Cost for the Aircraft;

            (ii) to the extent not previously accomplished by a prior
      authorization, to authorize a representative or representatives of the
      Owner Trustee (who shall be an employee or employees, or an agent or
      agents, of Lessee designated by Lessee) to accept delivery of the Aircraft
      on the Delivery Date pursuant to the Acceptance Certificate;


                                      -4-
<PAGE>

            (iii) to accept from Lessee the Bill of Sale and the FAA Bill of
      Sale for the Aircraft referred to in Section 4(a)(v)(8) and 4(a)(v)(9);

            (iv) to execute an Aircraft Registration Application, the Lease
      Supplement and the Trust Supplement, in each case covering the Aircraft;

            (v) to borrow from the Pass Through Trustee to finance a portion of
      the Lessor's Cost for the Aircraft and to execute and deliver to the
      Subordination Agent on behalf of the Pass Through Trustee for each of the
      Pass Through Trusts a principal amount of Secured Certificates bearing the
      interest rate set forth opposite the name of such Pass Through Trust on
      Schedule II hereto, which Secured Certificates shall be in the principal
      amounts set forth on Schedule II hereto, pursuant hereto and to the Trust
      Indenture; and

            (vi) to take such other action as may be required to be taken by the
      Owner Trustee on the Delivery Date by the terms of any Operative Document.

            SECTION 4. Conditions. (a) Conditions Precedent to the
Participations in the Aircraft. It is agreed that the obligations of each of the
Pass Through Trustee and the Owner Participant to participate in the payment of
Lessor's Cost and to make available the amount of its respective Commitment are
subject to the satisfaction prior to or on the Delivery Date of the following
conditions precedent, except that paragraphs (iii), (v)(5), (xxi), (xxii) and
(xxiv) shall not be a condition precedent to the obligations of the Pass Through
Trustee, and paragraphs (iv), (vii)(D) and (xiv) shall not be a condition
precedent to the obligation of the Owner Participant:

            (i) The Pass Through Trustee and the Owner Participant shall have
      received due notice with respect to such participation pursuant to Section
      2 hereof (or shall have waived such notice either in writing or as
      provided in Section 2).

            (ii) No change shall have occurred after the date of the execution
      and delivery of this Agreement in applicable law or regulations or
      guidelines or interpretations thereof by appropriate regulatory
      authorities which would make it a violation of law or regulations or
      guidelines for the Pass Through Trustee or the Owner Participant to make
      its Commitment available in accordance with Section 1 hereof.

            (iii) In the case of the Owner Participant, the Pass Through
      Trustees shall have made available the amount of their Commitments for the
      Aircraft in accordance with Section 1 hereof.

            (iv) In the case of the Pass Through Trustees, the Owner Participant
      shall have made available the amount of its Commitment for the Aircraft in
      accordance with Section 1 hereof.

            (v) The following documents shall have been duly authorized,
      executed and delivered by the respective party or parties thereto, shall
      each be satisfactory in form and substance to the Pass Through Trustee and
      the Owner Participant and shall be in full force and effect and executed
      counterparts shall have been delivered to the Pass Through Trustee and the
      Owner Participant, or their respective counsel, provided that only the


                                      -5-
<PAGE>

      Subordination Agent on behalf of each Pass Through Trustee shall receive
      an executed original of such Pass Through Trustee's respective Secured
      Certificate and provided, further, that an excerpted copy of the Purchase
      Agreement shall only be delivered to and retained by the Owner Trustee
      (but the Indenture Trustee shall also retain an excerpted copy of the
      Purchase Agreement which may be inspected by the Owner Participant and its
      counsel prior to the Delivery Date and subsequent to the Delivery Date may
      be inspected and reviewed by the Indenture Trustee if and only if there
      shall occur and be continuing an Event of Default), the chattel paper
      counterpart of the Lease and the Lease Supplement covering the Aircraft
      dated the Delivery Date shall be delivered to the Indenture Trustee, and
      the Tax Indemnity Agreement need only be satisfactory to the Owner
      Participant and Lessee and shall only be delivered to Lessee and the Owner
      Participant and their respective counsel:

                  (1) an excerpted copy of the Purchase Agreement (insofar as it
            relates to the Aircraft) and the Guaranty;

                  (2) the Purchase Agreement Assignment;

                  (3) the Lease;

                  (4) a Lease Supplement covering the Aircraft dated the
            Delivery Date;

                  (5) the Tax Indemnity Agreement;

                  (6) the Trust Agreement;

                  (7) a Trust Supplement covering the Aircraft dated the
            Delivery Date;

                  (8) the Bill of Sale;

                  (9) the FAA Bill of Sale;

                  (10) an acceptance certificate covering the Aircraft in the
            form agreed to by the Owner Participant and Lessee (herein called
            the "Acceptance Certificate") duly completed and executed by the
            Owner Trustee or its agent, which may be a representative of Lessee,
            and by such representative on behalf of Lessee;

                  (11) the Trust Indenture;

                  (12) the Secured Certificates;

                  (13) the Consent and Agreement;

                  (14) the Guarantee; and

                  (15) the French Pledge Agreement.


                                      -6-
<PAGE>

            In addition, the Pass Through Trustee and the Owner Participant each
shall have received executed counterparts or conformed copies of the following
documents:

                  (1) each of the Pass Through Trust Agreements;

                  (2) the Intercreditor Agreement; and

                  (3) the Liquidity Facility for each of the Pass Through
            Trusts.

            (vi) A Uniform Commercial Code financing statement or statements
      covering all the security interests created by or pursuant to the Granting
      Clause of the Trust Indenture that are not covered by the recording system
      established by the Federal Aviation Act, shall have been executed and
      delivered by the Owner Trustee, and such financing statement or statements
      shall have been duly filed in all places necessary or advisable, and any
      additional Uniform Commercial Code financing statements deemed advisable
      by the Owner Participant or the Pass Through Trustee shall have been
      executed and delivered by Lessee or the Owner Trustee and duly filed.

            (vii) The Pass Through Trustee and the Owner Participant shall have
      received the following:

                  (A)(1) an incumbency certificate of Lessee and the Guarantor
            (as the case may be) as to the person or persons authorized to
            execute and deliver this Agreement, the Lease, the Lease Supplement
            covering the Aircraft, the Bill of Sale, the FAA Bill of Sale, the
            Purchase Agreement Assignment, the Tax Indemnity Agreement, the Pass
            Through Trust Agreements, the Guarantee and any other documents to
            be executed on behalf of Lessee or the Guarantor (as the case may
            be) in connection with the transactions contemplated hereby and the
            signatures of such person or persons;

                  (2) a copy of the resolutions of the board of directors of
            Lessee and the Guarantor or the executive committee thereof,
            certified by the Secretary or an Assistant Secretary of Lessee and
            the Guarantor (as the case may be), duly authorizing the
            transactions contemplated hereby and the execution and delivery of
            each of the documents required to be executed and delivered on
            behalf of Lessee or the Guarantor (as the case may be) in connection
            with the transactions contemplated hereby; and

                  (3) a copy of the certificate of incorporation of Lessee and
            the Guarantor, certified by the Secretary of State of the State of
            Minnesota in the case of Lessee and certified by the Secretary of
            State of the State of Delaware in the case of the Guarantor, a copy
            of the by-laws of Lessee and the Guarantor, certified by the
            Secretary or Assistant Secretary of Lessee and the Guarantor (as the
            case may be), and a certificate or other evidence from the Secretary
            of State of the State of Minnesota in the case of Lessee and from
            the Secretary of State of the State of Delaware in the case of the
            Guarantor, dated as of a date reasonably near the Delivery Date, as
            to the due incorporation and good standing of Lessee or the
            Guarantor (as the case may be) in such state.


                                      -7-
<PAGE>

                  (B)(1) an incumbency certificate of the Indenture Trustee as
            to the person or persons authorized to execute and deliver this
            Agreement, the Trust Indenture and any other documents to be
            executed on behalf of the Indenture Trustee in connection with the
            transactions contemplated hereby and the signatures of such person
            or persons;

                  (2) a copy of the resolutions of the board of directors of the
            Indenture Trustee, certified by the Secretary or an Assistant
            Secretary of the Indenture Trustee, duly authorizing the
            transactions contemplated hereby and the execution and delivery of
            each of the documents required to be executed and delivered on
            behalf of the Indenture Trustee in connection with the transactions
            contemplated hereby;

                  (3) a copy of the articles of association and by-laws of the
            Indenture Trustee, each certified by the Secretary or an Assistant
            Secretary of the Indenture Trustee; and

                  (4) a certificate signed by an authorized officer of the
            Indenture Trustee, dated the Delivery Date, certifying that the
            representations and warranties contained herein of the Indenture
            Trustee are correct as though made on and as of the Delivery Date,
            except to the extent that such representations and warranties relate
            solely to an earlier date (in which case such representations and
            warranties are correct on and as of such earlier date).

                  (C)(1) an incumbency certificate of the Owner Trustee as to
            the person or persons authorized to execute and deliver this
            Agreement, the Lease, the Lease Supplement covering the Aircraft,
            the Trust Agreement, the Trust Indenture, the Purchase Agreement
            Assignment and any other documents to be executed on behalf of the
            Owner Trustee in connection with the transactions contemplated
            hereby and the signatures of such person or persons;

                  (2) a copy of the resolutions of the board of directors of the
            Owner Trustee, certified by the Secretary or an Assistant Secretary
            of the Owner Trustee, duly authorizing the transactions contemplated
            hereby and the execution and delivery of each of the documents
            required to be executed and delivered on behalf of the Owner Trustee
            in connection with the transactions contemplated hereby;

                  (3) a copy of the articles of association and by-laws of the
            Owner Trustee, each certified by the Secretary or an Assistant
            Secretary of the Owner Trustee; and

                  (4) a certificate signed by an authorized officer of the Owner
            Trustee, dated the Delivery Date, certifying that the
            representations and warranties contained herein of the Owner Trustee
            (in its individual capacity and as trustee) are correct as though
            made on and as of the Delivery Date, except to the extent that such
            representations and warranties relate solely to an earlier date (in
            which


                                      -8-
<PAGE>

            case such representations and warranties are correct on and as of
            such earlier date).

                  (D)(1) an incumbency certificate of the Owner Participant as
            to the person or persons authorized to execute and deliver this
            Agreement, the Tax Indemnity Agreement, the Trust Agreement and any
            other documents to be executed on behalf of the Owner Participant in
            connection with the transactions contemplated hereby and the
            signatures of such person or persons;

                  (2) a certificate signed by the Secretary or an Assistant
            Secretary of the Owner Participant, to the effect that the
            transactions contemplated hereby and the execution and delivery of
            each of the documents required to be executed and delivered on
            behalf of the Owner Participant in connection with the transactions
            contemplated hereby have been duly authorized;

                  (3) a copy of the articles of association and by-laws of the
            Owner Participant, each certified by the Secretary or an Assistant
            Secretary of the Owner Participant; and

                  (4) a certificate signed by an authorized officer of the Owner
            Participant, dated the Delivery Date, certifying that the
            representations and warranties contained herein of the Owner
            Participant are correct as though made on and as of the Delivery
            Date, except to the extent that such representations and warranties
            relate solely to an earlier date (in which case such representations
            and warranties are correct on and as of such earlier date).

            (viii) All appropriate action required to have been taken prior to
      the Delivery Date in connection with the transactions contemplated by this
      Agreement shall have been taken by the Federal Aviation Administration, or
      any governmental or political agency, subdivision or instrumentality of
      the United States, and all orders, permits, waivers, authorizations,
      exemptions and approvals of such entities required to be in effect on the
      Delivery Date in connection with the transactions contemplated by this
      Agreement shall have been issued, and all such orders, permits, waivers,
      authorizations, exemptions and approvals shall be in full force and effect
      on the Delivery Date.

            (ix) On the Delivery Date the Pass Through Trustee and the Owner
      Participant shall have received a certificate signed by an authorized
      officer of Lessee (and with respect to the matters set forth in clause (4)
      below, the Guarantor) to the effect that:

                  (1) the Aircraft has been duly certified by the Federal
            Aviation Administration as to type and has a current certificate of
            airworthiness;

                  (2) the FAA Bill of Sale, the Lease, the Lease Supplement, the
            Trust Indenture and the Trust Supplement covering the Aircraft shall
            have been duly filed for recordation (or shall be in the process of
            being so duly filed for recordation) with the Federal Aviation
            Administration, and the Trust Agreement shall have been filed (or
            shall be in the process of being so filed) with the Federal Aviation
            Administration;


                                      -9-
<PAGE>

                  (3) application for registration of the Aircraft in the name
            of the Owner Trustee has been duly made with the Federal Aviation
            Administration; and

                  (4) the representations and warranties contained herein of
            Lessee and the Guarantor are correct as though made on and as of the
            Delivery Date, except to the extent that such representations and
            warranties (other than those contained in clause (F) of Section
            7(a)(iv)) relate solely to an earlier date (in which case such
            representations and warranties were correct on and as of such
            earlier date).

            (x) Lessee and the Guarantor shall have entered into the
      Underwriting Agreement and each of the Pass Through Trust Agreements, the
      Certificates shall have been issued and sold pursuant to the Underwriting
      Agreement and the Pass Through Trust Agreements.

            (xi) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Indenture Trustee,
      the Owner Participant and the Owner Trustee, and reasonably satisfactory
      as to scope and substance to the Pass Through Trustee and the Owner
      Participant, an opinion substantially in the form of Exhibit B-1 hereto
      from Simpson Thacher & Bartlett, special counsel for Lessee and the
      Guarantor, an opinion substantially in the form of Exhibit B-2 hereto from
      Cadwalader, Wickersham & Taft, special counsel for Lessee and the
      Guarantor, and an opinion substantially in the form of Exhibit B-3 hereto
      from Lessee's legal department.

            (xii) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Indenture Trustee,
      the Owner Participant, the Owner Trustee, the Guarantor and Lessee and
      reasonably satisfactory as to scope and substance to the Pass Through
      Trustee, the Owner Participant, the Guarantor and Lessee, an opinion
      substantially in the form of Exhibit C hereto from counsel to the Supplier
      and the Manufacturer.

            (xiii) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Indenture Trustee,
      the Owner Participant, the Owner Trustee, the Guarantor and Lessee, and
      reasonably satisfactory as to scope and substance to the Pass Through
      Trustee, the Owner Participant, the Guarantor and Lessee, an opinion
      substantially in the form of Exhibit D hereto from Ray, Quinney & Nebeker,
      special counsel for the Owner Trustee.

            (xiv) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee, the Indenture Trustee, the Owner Trustee, the
      Guarantor and Lessee, and reasonably satisfactory as to scope and
      substance to the Pass Through Trustee, the Guarantor and Lessee, an
      opinion substantially in the form of Exhibit E-1 hereto from
      [________________], special counsel for the Owner Participant, and an
      opinion substantially in the form of Exhibit E-2 hereto from the Owner
      Participant's in-house counsel.

            (xv) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Indenture Trustee,
      the Owner Participant, the


                                      -10-
<PAGE>

      Owner Trustee, the Guarantor and Lessee, and reasonably satisfactory as to
      scope and substance to the Pass Through Trustee, the Owner Participant,
      the Guarantor and Lessee, an opinion substantially in the form of Exhibit
      F hereto from Crowe & Dunlevy, P.C.

            (xvi) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Owner Participant,
      the Owner Trustee, the Guarantor and Lessee, and reasonably satisfactory
      as to scope and substance to the Pass Through Trustee, the Owner
      Participant, the Guarantor and Lessee, an opinion substantially in the
      form of Exhibit G hereto from Bingham Dana LLP, special counsel for the
      Indenture Trustee.

            (xvii) [Intentionally Omitted].

            (xviii) The Pass Through Trustee and Owner Participant shall have
      received an independent insurance broker's report, in form and substance
      satisfactory to the Pass Through Trustee and the Owner Participant, as to
      the due compliance with the terms of Section 11 of the Lease relating to
      insurance with respect to the Aircraft.

            (xix) Lessor's Cost for the Aircraft shall be $[______________].

            (xx) No action or proceeding shall have been instituted nor shall
      governmental action be threatened before any court or governmental agency,
      nor shall any order, judgment or decree have been issued or proposed to be
      issued by any court or governmental agency at the time of the Delivery
      Date to set aside, restrain, enjoin or prevent the completion and
      consummation of this Agreement or the transactions contemplated hereby.

            (xxi) The Owner Participant shall have received from
      [___________________], special tax counsel to the Owner Participant, an
      opinion, in form and substance satisfactory to the Owner Participant, with
      respect to certain Federal income tax aspects of the transaction
      contemplated by the Operative Documents.

            (xxii) In the opinion of the Owner Participant and its special tax
      counsel, there shall have been, since the date hereof, no amendment,
      modification, addition, or change in or to the provisions of the Internal
      Revenue Code of 1986, as amended through the date hereof, and the
      regulations promulgated under the Code (including temporary regulations),
      Internal Revenue Service Revenue Procedures or Revenue Rulings, or other
      administrative interpretations, applicable judicial precedents or
      Executive Orders of the President of the United States, all as in effect
      on the date hereof, the effect of which might preclude the Owner
      Participant from obtaining any of the income tax benefits and consequences
      assumed to be available to the Owner Participant as set forth in Section 2
      of the Tax Indemnity Agreement.

            (xxiii) The Pass Through Trustee and the Owner Participant shall
      have received a favorable opinion substantially in the form of Exhibit I
      hereto addressed to the Pass Through Trustee and the Owner Participant,
      and reasonably satisfactory as to scope and substance to the Pass Through
      Trustee and the Owner Participant, from Cadwalader, Wickersham & Taft,
      special counsel for the Lessee, which opinion shall state (with


                                      -11-
<PAGE>

      customary assumptions and qualifications) that the Owner Trustee, as
      lessor under the Lease, and the Indenture Trustee, as assignee of the
      Owner Trustee's rights under the Lease pursuant to the Trust Indenture,
      would be entitled to the benefits of 11 U.S.C. ss.1110 with respect to the
      Aircraft.

            (xxiv) The Owner Participant shall have received (A) a certificate
      signed by an authorized officer of the Pass Through Trustee, dated the
      Delivery Date, certifying that the representations and warranties
      contained herein of the Pass Through Trustee are correct as though made on
      and as of the Delivery Date, except to the extent that such
      representations and warranties relate solely to an earlier date (in which
      case such representations and warranties are correct on and as of such
      earlier date), (B) an opinion substantially in the form of Exhibit J-1
      hereto addressed to the Owner Participant, the Guarantor and Lessee of
      Bingham Dana LLP, special counsel for the Pass Through Trustee, and
      reasonably satisfactory as to scope and substance to the Owner
      Participant, the Guarantor and Lessee, and (C)(1) an incumbency
      certificate of the Pass Through Trustee as to the person or persons
      authorized to execute and deliver this Agreement and any other documents
      to be executed on behalf of the Pass Through Trustee in connection with
      the transactions contemplated hereby and the signatures of such person or
      persons; (2) a copy of the articles of association and by-laws of the Pass
      Through Trustee, each certified by the Secretary or an Assistant Secretary
      of the Pass Through Trustee; and (3) such other documents and evidence
      with respect to the Pass Through Trustee as it may reasonably request in
      order to establish the due consummation of the transactions contemplated
      by this Agreement, the taking of all necessary action in connection
      therewith and compliance with the conditions herein set forth.

            (xxv) The Pass Through Trustee and the Owner Participant shall have
      received, addressed to the Pass Through Trustee, the Owner Participant,
      the Owner Trustee, the Indenture Trustee, the Guarantor and Lessee, and
      reasonably satisfactory as to scope and substance, to the Pass Through
      Trustee, the Owner Participant, the Guarantor and Lessee, an opinion
      substantially in the form of Exhibit J-2 hereto from Bingham Dana LLP,
      special counsel to the Subordination Agent.

            Promptly upon the registration of the Aircraft and the recording of
the Trust Indenture, the Lease, the Lease Supplement covering the Aircraft and
the Trust Supplement covering the Aircraft pursuant to the Federal Aviation Act,
Lessee will cause Crowe & Dunlevy, P.C., special counsel in Oklahoma City,
Oklahoma, to deliver to the Pass Through Trustee, the Indenture Trustee, the
Owner Participant, the Owner Trustee and Lessee an opinion as to the due and
valid registration of the Aircraft in the name of the Owner Trustee, the due
recording of the FAA Bill of Sale, the Trust Indenture, such Lease Supplement,
such Trust Supplement and the Lease and the filing of the Trust Agreement and
the lack of filing of any intervening documents with respect to the Aircraft.

            (b) Conditions Precedent to the Obligations of Lessee and the
Guarantor. It is agreed that (A) the obligations of Lessee to sell the Aircraft
to the Owner Trustee and to accept delivery of the Aircraft under the Lease, and
(B) the obligations of Lessee and the Guarantor to enter into the other
Operative Documents, are all subject to the fulfillment to the satisfaction of
Lessee and the Guarantor prior to or on the Delivery Date of the following
conditions precedent:


                                      -12-
<PAGE>

            (i) All appropriate action required to have been taken on or prior
      to the Delivery Date in connection with the transactions contemplated by
      this Agreement shall have been taken by the Federal Aviation
      Administration, or any governmental or political agency, subdivision or
      instrumentality of the United States, and all orders, permits, waivers,
      exemptions, authorizations and approvals of such entities required to be
      in effect on the Delivery Date in connection with the transactions
      contemplated by this Agreement shall have been issued, and all such
      orders, permits, waivers, exemptions, authorizations and approvals shall
      be in full force and effect on the Delivery Date.

            (ii) The conditions specified in Sections 4(a)(ii), 4(a)(iii) and
      4(a)(iv) hereof shall have been satisfied.

            (iii) Those documents described in Section 4(a)(v) shall have been
      duly authorized, executed and delivered by the respective party or parties
      thereto (other than Lessee and the Guarantor) in the manner specified in
      Section 4(a)(v), shall each be satisfactory in form and substance to
      Lessee and the Guarantor, shall be in full force and effect on the
      Delivery Date, and an executed counterpart of each thereof (other than the
      Secured Certificates) shall have been delivered to Lessee or its special
      counsel and the Guarantor or its special counsel.

            (iv) Lessee and the Guarantor shall have received (A) each
      certificate referred to in Section 4(a)(vii) (other than the certificate
      referred to in clause (A) thereof), (B) the certificate referred to in
      Section 4(a)(xxiv)(A), and (C)(1) an incumbency certificate of the Pass
      Through Trustee as to the person or persons authorized to execute and
      deliver this Agreement and any other documents to be executed on behalf of
      the Pass Through Trustee in connection with the transactions contemplated
      hereby and the signatures of such person or persons; (2) a copy of the
      articles of association and by-laws of the Pass Through Trustee, each
      certified by the Secretary or an Assistant Secretary of the Pass Through
      Trustee; and (3) such other documents and evidence with respect to the
      Pass Through Trustee as Lessee or its special counsel and the Guarantor or
      its special counsel may reasonably request in order to establish the due
      consummation of the transactions contemplated by this Agreement, the
      taking of all necessary action in connection therewith and compliance with
      the conditions herein set forth.

            (v) Lessee and the Guarantor shall have received the opinions set
      forth in Sections 4(a)(xii), 4(a)(xiii), 4(a)(xiv), 4(a)(xv), 4(a)(xvi),
      4(a)(xxiv)(B) and 4(a)(xxv) in each case addressed to Lessee and the
      Guarantor and dated the Delivery Date and in each case in scope and
      substance reasonably satisfactory to Lessee and its special counsel and
      the Guarantor and its special counsel.

            (vi) No action or proceeding shall have been instituted nor shall
      governmental action be threatened before any court or governmental agency,
      nor shall any order, judgment or decree have been issued or proposed to be
      issued by any court or governmental agency at the time of the Delivery
      Date to set aside, restrain, enjoin or prevent the completion and
      consummation of this Agreement or the transactions contemplated hereby.


                                      -13-
<PAGE>

            (vii) No change shall have occurred after the date of the execution
      and delivery of this Agreement in applicable law or regulations or
      guidelines or interpretations by appropriate regulatory authorities which
      would make it a violation of law or regulations or guidelines for Lessee
      or the Guarantor to enter into any transaction contemplated by the
      Operative Documents.

            (viii) In the opinion of Lessee and its special counsel, there shall
      have been, since the date hereof, no amendment, modification, addition or
      change in or to the Internal Revenue Code of 1986, as amended through the
      date hereof, the regulations promulgated under the Code (including
      temporary regulations), Internal Revenue Service Revenue Procedures or
      Revenue Rulings, or other administrative interpretations, applicable
      judicial precedents or Executive Orders of the President of the United
      States which might give rise to an indemnity obligation of Lessee under
      any of the Operative Documents.

            (ix) Lessee shall have been paid Lessor's Cost for the Aircraft.

            SECTION 5. [Intentionally Omitted].

            SECTION 6. Extent of Interest of Certificate Holders. No Certificate
Holder (as defined in the Trust Indenture) shall have any further interest in,
or other right with respect to, the mortgage and security interests created by
the Trust Indenture when and if the principal of and interest on all Secured
Certificates held by such holder and all other sums payable to such holder
hereunder, under the Trust Indenture and under such Secured Certificates shall
have been paid in full. Each Pass Through Trustee and, by its acceptance of a
Secured Certificate, each Certificate Holder agrees that it will look solely to
the income and proceeds from the Trust Indenture Estate to the extent available
for distribution to such Certificate Holder as provided in Article III of the
Trust Indenture and that neither the Owner Participant nor the Owner Trustee
shall be personally liable to the Pass Through Trustees or any Certificate
Holder for any amounts payable under the Secured Certificates, the Trust
Indenture or hereunder, except as expressly provided in the Operative Documents.

            SECTION 7. Representations and Warranties of Lessee and the
Guarantor; Indemnities. (a) Representations and Warranties. Lessee and the
Guarantor represent and warrant to the Pass Through Trustee, the Owner Trustee,
the Indenture Trustee, the Liquidity Provider, the Subordination Agent and the
Owner Participant that as of the Delivery Date:

            (i) each of Lessee and the Guarantor is a corporation duly
      organized, validly existing and in good standing under the laws of the
      state of its incorporation, has the corporate power and authority to own
      or hold under lease its properties, has, or had on the respective dates of
      execution thereof, the corporate power and authority to enter into and
      perform its obligations under (i) in the case of Lessee, the Lessee
      Documents, the Pass Through Trust Agreements, the Underwriting Agreement
      and the other Operative Documents to which it is a party and (ii) in the
      case of the Guarantor, this Agreement, the Pass Through Trust Agreements,
      the Underwriting Agreement and the other Operative Documents to which it
      is a party, and is duly qualified to do business as a foreign corporation
      in each state in which its operations or the nature of its business
      requires


                                      -14-
<PAGE>

      other than failures to so qualify which would not have a material adverse
      effect on the condition (financial or otherwise), consolidated business or
      properties of it and its subsidiaries considered as one enterprise;

            (ii) Lessee is a Certificated Air Carrier, and its chief executive
      office (as such term is used in Article 9 of the Uniform Commercial Code
      in effect in the State of Minnesota) is located at Eagan, Minnesota;

            (iii) the execution and delivery by Lessee or the Guarantor (as the
      case may be) of the Lessee Documents, the Pass Through Trust Agreements,
      the Underwriting Agreement and each other Operative Document to which
      Lessee or the Guarantor (as the case may be) is a party, and the
      performance of the obligations of Lessee or the Guarantor (as the case may
      be) under the Lessee Documents, the Pass Through Trust Agreements, the
      Underwriting Agreement and each other Operative Document to which Lessee
      or the Guarantor (as the case may be) is a party, have been duly
      authorized by all necessary corporate action on the part of Lessee or the
      Guarantor, do not require any stockholder approval, or approval or consent
      of any trustee or holder of any material indebtedness or material
      obligations of Lessee or the Guarantor, except such as have been duly
      obtained and are in full force and effect, and do not contravene any law,
      governmental rule, regulation or order binding on Lessee or the Guarantor
      (as the case may be) or the certificate of incorporation or by-laws of
      Lessee or the Guarantor (as the case may be), or contravene the provisions
      of, or constitute a default under, or result in the creation of any Lien
      (other than Permitted Liens) upon the property of Lessee or the Guarantor
      (as the case may be) under, any indenture, mortgage, contract or other
      agreement to which Lessee or the Guarantor (as the case may be) is a party
      or by which it may be bound or affected which contravention, default or
      Lien, individually or in the aggregate, would be reasonably likely to have
      a material adverse effect on the condition (financial or otherwise),
      business or properties of the Guarantor and its subsidiaries considered as
      one enterprise;

            (iv) neither the execution and delivery by Lessee or the Guarantor
      (as the case may be) of the Lessee Documents, the Pass Through Trust
      Agreements, the Underwriting Agreement or any other Operative Document to
      which Lessee or the Guarantor (as the case may be) is a party, nor the
      performance of the obligations of Lessee or the Guarantor (as the case may
      be) under the Lessee Documents, the Pass Through Trust Agreements, the
      Underwriting Agreement or the other Operative Documents to which Lessee or
      the Guarantor (as the case may be) is a party, requires the consent or
      approval of, the giving of notice to, the registration with, or the taking
      of any other action in respect of, the Department of Transportation, the
      FAA, or any other federal, state or foreign governmental authority having
      jurisdiction over Lessee or the Guarantor, other than (A) the registration
      of the Certificates under the Securities Act of 1933, as amended, and
      under the securities laws of any state in which the Certificates may be
      offered for sale if the laws of such state require such action, (B) the
      qualification of the Pass Through Trust Agreements under the Trust
      Indenture Act of 1939, as amended, pursuant to an order of the Securities
      and Exchange Commission, (C) the orders, permits, waivers, exemptions,
      authorizations and approvals of the regulatory authorities having
      jurisdiction over the operation of the Aircraft by Lessee or any Sublessee
      required to be obtained on or prior to


                                      -15-
<PAGE>

      the Delivery Date, which orders, permits, waivers, exemptions,
      authorizations and approvals have been duly obtained and are, or on the
      Delivery Date will be, in full force and effect (other than a flying time
      wire, all steps to obtain the issuance of which will have been, on the
      Delivery Date, taken or caused to be taken by Lessee), (D) the
      registration of the Aircraft referred to in Section 4(a)(ix)(3), (E) the
      registrations and filings referred to in Section 7(a)(vi), and (F)
      authorizations, consents, approvals, actions, notices and filings required
      to be obtained, taken, given or made either only after the date hereof or
      the failure of which to obtain, take, give or make would not be reasonably
      likely to have a material adverse effect on the condition (financial or
      otherwise), business or properties of the Guarantor and its subsidiaries
      considered as one enterprise;

            (v) this Agreement, each of the other Lessee Documents, the Pass
      Through Trust Agreements and the Guarantee constitute the legal, valid and
      binding obligations of Lessee or the Guarantor (as the case may be)
      enforceable against Lessee or the Guarantor (as the case may be) in
      accordance with their respective terms, except as the same may be limited
      by applicable bankruptcy, insolvency, fraudulent conveyance,
      reorganization, moratorium or similar laws affecting the rights of
      creditors or lessors generally and by general principles of equity,
      whether considered in a proceeding at law or in equity, and except, in the
      case of the Lease, as limited by applicable laws which may affect the
      remedies provided in the Lease, which laws, however, do not make the
      remedies provided in the Lease inadequate for practical realization of the
      benefits intended to be afforded thereby;

            (vi) except for (A) [the filing for recording pursuant to the
      Federal Aviation Act of the termination of the Mortgage, (B)] the filing
      of the Trust Agreement with the FAA, [(B)] the registration of the
      Aircraft pursuant to the Federal Aviation Act, [(C)] the filing for
      recording pursuant to the Federal Aviation Act of the Lease with the Lease
      Supplement covering the Aircraft, the Trust Indenture and the Trust
      Supplement attached thereto and made a part thereof, the Trust Indenture
      with the Trust Supplement attached thereto and made a part thereof and the
      FAA Bill of Sale, [(D)] the filing of financing statements (and
      continuation statements at periodic intervals) with respect to the
      security interests created by such documents under the Uniform Commercial
      Code of Minnesota and Utah and such other states as may be specified in
      the opinions furnished pursuant to Section 4(a)(xi) hereof, and [(E)] the
      taking of possession by the Indenture Trustee of the original chattel
      paper counterpart of each of the Lease and the Lease Supplement covering
      the Aircraft, no further filing or recording of any document (including
      any financing statement in respect thereof under Article 9 of the Uniform
      Commercial Code of any applicable jurisdiction) is necessary under the
      laws of the United States of America or any State thereof in order to
      perfect the Owner Trustee's interest in the Aircraft as against Lessee and
      any third parties, or to perfect the security interest in favor of the
      Indenture Trustee in the Owner Trustee's interest in the Aircraft (with
      respect to such portion of the Aircraft as is covered by the recording
      system established by the FAA pursuant to 49 U.S.C. Section 44107) and in
      the Lease in any applicable jurisdiction in the United States;


                                      -16-
<PAGE>

            (vii) neither Lessee, the Guarantor nor any of their affiliates has
      directly or indirectly offered the Certificates for sale to any Person
      other than in a manner permitted by the Securities Act of 1933, as
      amended, and by the rules and regulations thereunder;

            (viii) neither Lessee nor the Guarantor is an "investment company"
      within the meaning of the Investment Company Act of 1940, as amended;

            (ix) no event has occurred and is continuing which constitutes an
      Event of Default or would constitute an Event of Default but for the
      requirement that notice be given or time lapse or both;

            (x) no event has occurred and is continuing which constitutes an
      Event of Loss or would constitute an Event of Loss with the lapse of time;

            (xi) Lessee is solvent and will not be rendered insolvent by the
      sale of the Aircraft; after the sale of the Aircraft the capital of Lessee
      will not be unreasonably small for the conduct of the business in which
      Lessee is engaged or is about to engage; Lessee has no intention or belief
      that it is about to incur debts beyond its ability to pay as they mature;
      and Lessee's sale of the Aircraft is made without any intent to hinder,
      delay or defraud either present or future creditors;

            (xii) none of the proceeds from the issuance of the Secured
      Certificates or from the acquisition by the Owner Participant of its
      beneficial interest in the Trust Estate will be used directly or
      indirectly by Lessee to purchase or carry any "margin security" as such
      term is defined in Regulation U of the Board of Governors of the Federal
      Reserve System; and

            (xiii) On the Delivery Date, all sales or use tax then due and for
      which Lessee is responsible pursuant to Section 7(b)(i) hereof shall have
      been paid, other than such taxes which are being contested by Lessee in
      good faith and by appropriate proceedings so long as such proceedings do
      not involve any material risk of the sale, forfeiture or loss of the
      Aircraft.

            (b) General Tax Indemnity. Exhibit K, which is a complete statement
of the provisions of Section 7(b), is incorporated herein in its entirety as if
fully set forth herein.

            (c) General Indemnity. Exhibit L, which is a complete statement of
the provisions of Section 7(c), is incorporated herein in its entirety as if
fully set forth herein.

            (d) Income Tax. For purposes of this Section 7, the term "Income
Tax" means any Tax based on or measured by gross or net income or receipts
(other than sales, use, license or property Taxes or Taxes in the nature
thereof) (including, without limitation, capital gains taxes, minimum taxes,
income taxes collected by withholding and taxes on tax preference items), and
Taxes which are capital, doing business, excess profits or net worth taxes and
interest, additions to tax, penalties, or other charges in respect thereof.


                                      -17-
<PAGE>

            SECTION 8. Representations, Warranties and Covenants.

            (a) [Intentionally Omitted].

            (b) [Intentionally Omitted].

            (c) Each of the Owner Participant and First Security Bank, National
Association, in its individual capacity, represents and warrants to the other
parties to this Agreement that it is, and on the Delivery Date will be, a
Citizen of the United States without making use of any voting trust, voting
powers agreement or similar arrangement. The Owner Participant agrees, solely
for the benefit of Lessee and the Loan Participants, that if (i) it shall cease
to be, or believes itself likely to cease to be, a Citizen of the United States
and (ii) the Aircraft shall or would therefore become ineligible for
registration in the name of the Owner Trustee under the Federal Aviation Act and
regulations then applicable thereunder, then the Owner Participant shall (at its
own expense and without any reimbursement or indemnification from Lessee)
promptly effect a voting trust, voting powers agreement or other similar
arrangement or take any other action as may be necessary to prevent any
deregistration and to maintain the United States registration of the Aircraft.
It is agreed that: (A) the Owner Participant shall be liable to pay on request
to each of the other parties hereto and to each holder of a Secured Certificate
for any damages suffered by any such other party or holder as the result of the
representation and warranty of the Owner Participant in the first sentence of
this Section 8(c) proving to be untrue as of the Delivery Date; and (B) the
Owner Participant shall be liable to pay on request to Lessee, any Sublessee and
the Loan Participants for any damages which may be incurred by Lessee, any
Sublessee or the Loan Participants as a result of the Owner Participant's
failure to comply with its obligations pursuant to the second sentence of this
Section 8(c). Each party hereto agrees, upon the request and at the sole expense
of the Owner Participant, to cooperate with the Owner Participant in complying
with its obligations under the provisions of the second sentence of this Section
8(c). First Security Bank, National Association, in its individual capacity,
agrees that if at any time an officer or responsible employee of the Corporate
Trust Department of First Security Bank, National Association, shall obtain
actual knowledge that First Security Bank, National Association, has ceased to
be a Citizen of the United States without making use of a voting trust, voting
powers agreement or similar arrangement, it will promptly resign as Owner
Trustee (if and so long as such citizenship is necessary under the Federal
Aviation Act as in effect at such time or, if it is not necessary, if and so
long as the Owner Trustee's citizenship would have any material adverse effect
on the Loan Participants, Lessee or the Owner Participant), effective upon the
appointment of a successor Owner Trustee in accordance with Section 9.01 of the
Trust Agreement. If the Owner Participant or First Security Bank, National
Association, in its individual capacity, does not comply with the requirements
of this Section 8(c), the Owner Trustee, the Indenture Trustee and the
Participants hereby agree that an Event of Default (or an event which would
constitute an Event of Default but for lapse of time or the giving of notice or
both) shall not have occurred and be continuing under the Lease due to
non-compliance by Lessee with the registration requirements in the Lease.

            (d) First Security Bank, National Association, in its individual
capacity, represents and warrants that both the principal place of business of
the Owner Trustee and the place where its records concerning the Aircraft and
all of its interest in, to and under the


                                      -18-
<PAGE>

Operative Documents to which it is a party are kept is Salt Lake City, Utah.
First Security Bank, National Association, in its individual capacity, agrees
that it will not change the location of such office to a location outside of
Salt Lake City, Utah, without prior written notice to all parties. First
Security Bank, National Association, in its individual capacity, further
represents and warrants that (A) on the Delivery Date the Owner Trustee shall
have received whatever title to the Aircraft as was conveyed to it by Lessee,
and (B) the Trust Agreement, and, assuming due authorization, execution and
delivery of the Trust Agreement by the Owner Participant, the other Owner
Trustee Documents, when executed and delivered, shall have been duly executed
and delivered by one of its officers who is duly authorized to execute and
deliver such instruments on behalf of the Owner Trustee. First Security Bank,
National Association, in its individual capacity, represents that it has not
offered any interest in the Trust Estate or any Secured Certificates or any
similar securities for sale to, or solicited any offer to acquire the same from,
anyone, and that no officer or responsible employee of the Corporate Trust
Department of First Security Bank, National Association, has knowledge of any
such offer or solicitation by anyone other than Lessee.

            (e) Each Loan Participant represents and warrants that neither it
nor anyone acting in its behalf has offered any Secured Certificates for sale
to, or solicited any offer to buy any Secured Certificate from, any Person other
than in a manner in compliance with, and which does not require registration
under, the Securities Act of 1933, as amended, or the rules and regulations
thereunder.

            (f) The Owner Participant and the Indenture Trustee agree that, at
any time after the Depreciation Period, Lessee may elect to effect a change in
registration of the Aircraft, at Lessee's cost and expense, so long as (a) the
country of registry of the Aircraft is a country listed on Exhibit A hereto (or
such other country as the Owner Trustee approves) and (b) the following
conditions are met: (i) unless the country of registry is Taiwan, the United
States maintains normal diplomatic relations with the country of registry of the
Aircraft, and if the country of registry is Taiwan, the United States maintains
diplomatic relations at least as good as those in effect on the Delivery Date;
and (ii) the Owner Trustee and the Indenture Trustee shall have received
favorable opinions (subject to customary exceptions) addressed to each such
party, from counsel of recognized reputation qualified in the laws of the
relevant jurisdiction to the effect that:

                  (A) the Owner Trustee's ownership interest in the Aircraft
            shall be recognized under the laws of such jurisdiction, (B) the
            obligations of Lessee, and the rights and remedies of the Owner
            Trustee, under the Lease shall remain valid, binding and (subject to
            customary bankruptcy and equitable remedies exceptions and to other
            exceptions customary in foreign opinions generally) enforceable
            under the laws of such jurisdiction (or the laws of the jurisdiction
            to which the laws of such jurisdiction would refer as the applicable
            governing law), (C) after giving effect to such change in
            registration, the Lien of the Trust Indenture on the Owner Trustee's
            right, title and interest in and to the Aircraft and the Lease shall
            continue as a valid and duly perfected first priority security
            interest and all filing, recording or other action necessary to
            protect the same shall have been accomplished (or, if such opinion
            cannot be given at the time of such proposed change in registration
            because such change in registration is not yet effective, (1)


                                      -19-
<PAGE>

            the opinion shall detail what filing, recording or other action is
            necessary and (2) the Owner Trustee and the Indenture Trustee shall
            have received a certificate from Lessee that all possible
            preparations to accomplish such filing, recording and other action
            shall have been done, and such filing, recording and other action
            shall be accomplished and a supplemental opinion to that effect
            shall be delivered to the Owner Trustee and the Indenture Trustee on
            or prior to the effective date of such change in registration), (D)
            it is not necessary, solely as a consequence of such change in
            registration and without giving effect to any other activity of the
            Owner Trustee, the Owner Participant or the Indenture Trustee (or
            any Affiliate thereof), as the case may be, for the Owner Trustee,
            the Owner Participant or the Indenture Trustee to qualify to do
            business in such jurisdiction, (E) there is no tort liability of the
            owner of an aircraft not in possession thereof under the laws of
            such jurisdiction (it being agreed that, in the event such latter
            opinion cannot be given in a form satisfactory to the Owner
            Participant, such opinion shall be waived if insurance reasonably
            satisfactory to the Owner Participant is provided to cover such
            risk), and (F) (unless Lessee shall have agreed to provide insurance
            covering the risk of requisition of use of such Aircraft by the
            government of such jurisdiction so long as such Aircraft is
            registered under the laws of such jurisdiction) the laws of such
            jurisdiction require fair compensation by the government of such
            jurisdiction payable in currency freely convertible into Dollars for
            the loss of use of such Aircraft in the event of the requisition by
            such government of such use.

In addition, as a condition precedent to any such change in registration, Lessee
shall furnish to the Owner Trustee and the Indenture Trustee an Officer's
Certificate to the effect that the insurance required by Section 11 of the Lease
shall be in full force and effect at the time of such change in registration
after giving effect to such change in registration and that the new country of
registry imposes aircraft maintenance standards not materially different from
those of the United States, France, Germany, Japan, the Netherlands or the
United Kingdom. Lessee shall pay all costs, expenses, fees, recording and
registration taxes, including the reasonable fees and expenses of counsel to the
Owner Trustee, the Owner Participant and the Indenture Trustee, and other
charges in connection with any such change in registration.

            (g) The Owner Participant represents and warrants to Lessee, the
Guarantor, the Indenture Trustee, the Pass Through Trustee, the Subordination
Agent, the Liquidity Provider and the Owner Trustee, in its capacity as such and
in its individual capacity, as follows:

            (i) it is duly incorporated, validly existing and in good standing
      under the laws of [_______________] and has the corporate power and
      authority to carry on its present business and operations and to own or
      lease its properties, and has the corporate power and authority to enter
      into and to perform its obligations under the Owner Participant Documents;
      this Agreement and the other Owner Participant Documents have been duly
      authorized, executed and delivered by it; and this Agreement and each of
      the other Owner Participant Documents constitute the legal, valid and
      binding obligations of the Owner Participant enforceable against it in
      accordance with its respective terms, except as such enforceability may be
      limited by bankruptcy, insolvency, reorganization, moratorium or other
      similar laws affecting the rights of creditors generally and by general


                                      -20-
<PAGE>

      principles of equity, whether considered in a proceeding at law or in
      equity; and it has a tangible net worth (exclusive of goodwill) greater
      than $50,000,000;

            (ii) neither (A) the execution and delivery by the Owner Participant
      of the Owner Participant Documents nor (B) compliance by it with all of
      the provisions thereof, (x) will contravene any law or order of any court
      or governmental authority or agency applicable to or binding on the Owner
      Participant (it being understood that no representation or warranty is
      made with respect to laws, rules or regulations relating to aviation or to
      the nature of the equipment owned by the Owner Trustee other than such
      laws, rules or regulations relating to the citizenship requirements of the
      Owner Participant under applicable law), or (y) will contravene the
      provisions of, or constitutes or has constituted or will constitute a
      default under, or result in the creation of any Lien (other than Liens
      provided for in the Operative Documents) upon any property of the Owner
      Participant under, its certificate of incorporation or by-laws or any
      indenture, mortgage, contract or other agreement or instrument to which
      the Owner Participant is a party or by which it or any of its property may
      be bound or affected;

            (iii) no authorization or approval or other action by, and no notice
      to or filing with, any governmental authority or regulatory body (other
      than as required by the Federal Aviation Act or the regulations
      promulgated thereunder) is required for the due execution, delivery or
      performance by it of the Owner Participant Documents;

            (iv) there are no pending or, to its knowledge, threatened actions
      or proceedings before any court or administrative agency or arbitrator
      which would materially adversely affect the Owner Participant's ability to
      perform its obligations under this Agreement, the Tax Indemnity Agreement
      and the Trust Agreement;

            (v) neither the Owner Participant nor anyone authorized by it to act
      on its behalf (it being understood that in proposing, facilitating and
      otherwise taking any action in connection with the financing contemplated
      hereby and agreed to herein by the Owner Participant, Lessee has not acted
      as agent of the Owner Participant) has directly or indirectly offered any
      Secured Certificate or Certificate or any interest in and to the Trust
      Estate, the Trust Agreement or any similar interest for sale to, or
      solicited any offer to acquire any of the same from, any Person; the Owner
      Participant's interest in the Trust Estate and the Trust Agreement is
      being acquired for its own account and is being purchased for investment
      and not with a view to any resale or distribution thereof;

            (vi) on the Delivery Date, the Trust Estate shall be free of Lessor
      Liens (including for this purpose Liens which would be Lessor Liens but
      for the proviso in the definition of Lessor Liens) attributable to the
      Owner Participant; and

            (vii) it is a Citizen of the United States (without making use of a
      voting trust agreement, voting powers agreement or similar arrangement).

            (h) Each of First Security Bank, National Association, in its
individual capacity, and the Owner Participant covenants and agrees that it
shall not cause or permit to exist a Lessor Lien attributable to it with respect
to the Aircraft or any other portion of the Trust


                                      -21-
<PAGE>

Estate. Each of First Security Bank, National Association, in its individual
capacity, and the Owner Participant agrees that it will promptly, at its own
expense, take such action as may be necessary duly to discharge such Lessor Lien
attributable to it. Each of First Security Bank, National Association, in its
individual capacity, and the Owner Participant agrees to make restitution to the
Trust Estate for any actual diminution of the assets of the Trust Estate
resulting from Lessor Liens (including for this purpose Liens which would be
Lessor Liens but for the proviso in the definition of Lessor Liens) attributable
to it. The Owner Participant agrees to make restitution to the Trust Estate for
any actual diminution of the assets of the Trust Estate resulting from any Taxes
or Expenses imposed on the Trust Estate against which Lessee is not required to
indemnify the Trust Estate pursuant to Section 7 hereof.

            (i) State Street Bank and Trust Company, in its individual capacity,
covenants and agrees that it shall not cause or permit to exist any Lien,
arising as a result of (A) claims against the Indenture Trustee not related to
its interest in the Aircraft or the administration of the Trust Indenture Estate
pursuant to the Trust Indenture, (B) acts of the Indenture Trustee not permitted
by, or failure of the Indenture Trustee to take any action required by, the
Operative Documents to the extent such acts arise or such failure arises from or
constitutes gross negligence or willful misconduct, (C) claims against the
Indenture Trustee relating to Taxes or Expenses which are excluded from the
indemnification provided by Section 7 pursuant to said Section 7, or (D) claims
against the Indenture Trustee arising out of the transfer by the Indenture
Trustee of all or any portion of its interest in the Aircraft, the Trust Estate,
the Trust Indenture Estate or the Operative Documents other than a transfer of
the Aircraft pursuant to Section 9, 10 or 19 of the Lease or Article IV or V of
the Trust Indenture or a transfer of the Aircraft pursuant to Section 15 of the
Lease while an Event of Default is continuing and prior to the time that the
Indenture Trustee has received all amounts due pursuant to the Trust Indenture.

            (j) [Intentionally Omitted].

            (k) Each Loan Participant represents and warrants that the Secured
Certificate to be issued to it pursuant to the Trust Indenture is being acquired
by it for investment and not with a view to resale or distribution (it being
understood that such Loan Participant may pledge or assign as security its
interest in each Secured Certificate issued to it), provided that the
disposition of its property shall at all times be and remain within its control,
except that the Loan Participants may sell, transfer or otherwise dispose of any
Secured Certificate or any portion thereof, or grant participations therein, in
a manner which in itself does not require registration under the Securities Act
of 1933, as amended.

            (l) The Indenture Trustee, and by acceptance of the Secured
Certificates the Certificate Holders, hereby (i) agree that for purposes of the
application of Section 1111(b) of Title 11 of the United States Code or any
successor provision or any comparable provisions that the "debtor" in any
bankruptcy proceeding involving the assets held or administered pursuant to the
Trust Agreement shall be strictly limited to the Trust Estate (excluding the
Excluded Payments) and (ii) make (and hereby agree to make), with respect to the
Trust Indenture Estate, the election provided for in Section 1111(b)(2) of Title
11 of the United States Code. It is hereby agreed by the Indenture Trustee, and
by the acceptance of the Secured Certificates the Certificate Holders hereby
agree, that if (i) all or any part of the Trust Estate becomes the property of,
or the Owner Participant becomes, a debtor subject to the reorganization
provisions of the Bankruptcy


                                      -22-
<PAGE>

Reform Act of 1978 or any successor provision or any comparable proceeding, (ii)
pursuant to such reorganization provisions the Owner Trustee (in its individual
capacity) or the Owner Participant is required, by reason of the Owner Trustee
(in its individual capacity) or the Owner Participant being held to have
recourse liability to the holder(s) of the Secured Certificates or to the
Indenture Trustee, directly or indirectly (other than the recourse liability of
the Owner Participant under this Participation Agreement), to make payment on
account of any amount payable as principal or interest on the Secured
Certificates and (iii) any holder(s) of the Secured Certificates or the
Indenture Trustee actually receives any Excess Payment (as hereinafter defined)
which reflects any payment by the Owner Trustee (in its individual capacity) or
the Owner Participant on account of (ii) above, then such holder(s) or the
Indenture Trustee, as the case may be, shall promptly refund to the Owner
Trustee or the Owner Participant (whichever shall have made such payment) such
Excess Payment. For purposes of this Section 8(l), "Excess Payment" means the
amount by which such payment exceeds the amount which would have been received
by the holder(s) of the Secured Certificates or the Indenture Trustee if the
Owner Trustee (in its individual capacity) or the Owner Participant had not
become subject to the recourse liability referred to in (ii) above. Nothing
contained in this Section 8(l) shall prevent the holder of a Secured Certificate
or the Indenture Trustee from enforcing any personal recourse obligation (and
retaining the proceeds thereof) of the Owner Trustee (in its individual
capacity) or the Owner Participant under this Agreement or the Trust Indenture
(and any exhibits or annexes thereto).

            (m) State Street Bank and Trust Company represents, warrants and
covenants, in its individual capacity, to Lessee, the Guarantor, the Owner
Trustee, the Pass Through Trustee, the Subordination Agent, the Liquidity
Provider and the Owner Participant as follows:

            (i) the Indenture Trustee is a Massachusetts trust company duly
      incorporated, validly existing and in good standing under the laws of
      Massachusetts, is a Citizen of the United States (without making use of
      any voting trust, voting powers agreement or similar arrangement), will
      notify promptly all parties to this Agreement if in its reasonable opinion
      its status as a Citizen of the United States (without making use of any
      voting trust, voting powers agreement or similar arrangement) is likely to
      change and will resign as Indenture Trustee as provided in Section 8.02 of
      the Trust Indenture promptly after it obtains actual knowledge that it has
      ceased to be such a Citizen of the United States (without making use of a
      voting trust, voting powers agreement or similar arrangement), and has the
      full corporate power, authority and legal right under the laws of the
      Commonwealth of Massachusetts and the United States pertaining to its
      banking, trust and fiduciary powers to execute and deliver each of this
      Agreement, the Trust Indenture and each other Operative Document to which
      it is a party and to carry out its obligations under this Agreement, the
      Trust Indenture, each other Operative Document to which it is a party and
      to authenticate the Secured Certificates;

            (ii) the execution and delivery by the Indenture Trustee of the
      Indenture Trustee Documents and the authentication of the Secured
      Certificates and the performance by the Indenture Trustee of its
      obligations under the Indenture Trustee Documents have been duly
      authorized by the Indenture Trustee and will not violate its articles of
      association or by-laws or the provisions of any indenture, mortgage,
      contract or other agreement to which it is a party or by which it is
      bound;


                                      -23-
<PAGE>

            (iii) this Agreement and each of the other Indenture Trustee
      Documents constitute the legal, valid and binding obligations of the
      Indenture Trustee enforceable against it in accordance with their
      respective terms, except as the same may be limited by applicable
      bankruptcy, insolvency, reorganization, moratorium or similar laws
      affecting the rights of creditors generally and by general principles of
      equity, whether considered in a proceeding at law or in equity;

            (iv) there are no pending or, to its knowledge, threatened actions
      or proceedings against the Indenture Trustee, either in its individual
      capacity or as Indenture Trustee, before any court or administrative
      agency which, if determined adversely to it, would materially adversely
      affect the ability of the Indenture Trustee, in its individual capacity or
      as Indenture Trustee as the case may be, to perform its obligations under
      the Operative Documents to which it is a party; and

            (v) there are no Indenture Trustee's Liens on the Aircraft or any
      portion of the Trust Estate.

            (n) The Owner Participant will not, directly or indirectly, sell,
assign, convey or otherwise transfer any of its right, title or interest in and
to this Agreement, the Trust Estate or the Trust Agreement or any proceeds
therefrom to any person or entity, unless (i) the proposed transferee is a
"Transferee" (as defined below), (ii) Lessee shall have (1) received an opinion
(in form and substance reasonably satisfactory to Lessee) of counsel to the
Owner Participant (who shall be reasonably satisfactory to Lessee) to the effect
that such transfer will not result in any risk of loss of tax benefits to, or
any increase in the tax liability of, Lessee and (2) received from the Owner
Participant so seeking to transfer such right, title or interest reasonably
satisfactory indemnification for any loss of tax benefits to, and increase in
the tax liability of, Lessee, and (iii) the Owner Participant sells, assigns,
conveys or otherwise transfers all of its right, title and interest in and to
this Agreement, the Trust Estate, the Trust Agreement and the proceeds therefrom
to a single entity. A "Transferee" shall mean either (A) a bank or other
financial institution with a combined capital, surplus and undivided profits of
at least $50,000,000 or a corporation whose tangible net worth is at least
$50,000,000, exclusive of goodwill, in either case as of the proposed date of
such transfer, as determined in accordance with generally accepted accounting
principles, or (B) any subsidiary of such a bank, financial institution or
corporation, provided that such bank, financial institution or corporation
furnishes to the Owner Trustee, the Indenture Trustee and Lessee a guaranty with
respect to the Owner Participant's obligations, in the case of the Owner
Trustee, under the Trust Agreement and, in the case of the Indenture Trustee and
Lessee, the Owner Participant's obligations hereunder, including but not limited
to, under Section 8(c) and Section 8(h) hereof, in form and substance reasonably
satisfactory to Lessee, the Owner Trustee and the Indenture Trustee; provided,
however, that any Transferee shall not be an airline, a commercial air carrier,
an air freight forwarder, an entity engaged in the business of parcel transport
by air or other similar person or a corporation or other entity controlling,
controlled by or under common control with such an airline, a commercial air
carrier, an air freight forwarder, an entity engaged in the business of parcel
transport by air or other similar person. Each such transfer to a Transferee
shall be subject to the conditions that (M) upon giving effect to such transfer,
the Transferee is a Citizen of the United States (without making use of a voting
trust agreement, voting powers agreement or other similar arrangement unless
approved by Lessee), and has full power and authority to enter into the
transactions


                                      -24-
<PAGE>

contemplated hereby, (N) the Transferee has the requisite power and authority to
enter into and carry out the transactions contemplated hereby and such
Transferee shall have delivered to Lessee, the Owner Trustee and the Indenture
Trustee an opinion of counsel in form and substance reasonably satisfactory to
such persons as to the due authorization, delivery, legal, valid and binding
effect and enforceability of the agreement or agreements referred to in the next
clause with respect to the Transferee and any guaranty provided pursuant to the
provisions of this Section 8(n) as to the guarantor, (O) the Transferee enters
into an agreement or agreements, in form and substance reasonably satisfactory
to the Owner Trustee, Lessee and the Indenture Trustee, whereby the Transferee
confirms that it shall be deemed a party to this Agreement and a party to the
Trust Agreement and agrees to be bound by all the terms of, and to undertake all
of the obligations of the transferor Owner Participant contained in, the Owner
Participant Documents (to the extent of the participation so transferred to it)
and makes the representations and warranties made by the Owner Participant
thereunder, (P) such transfer does not affect registration of the Aircraft under
the Federal Aviation Act, or any rules or regulations promulgated thereunder or
create a relationship which would be in violation thereof or violate any
provision of the Securities Act of 1933, as amended, or any other applicable
Federal or state law, (Q) the transferor Owner Participant assumes the risk of
any loss of Interest Deductions, Amortization Deductions and MACRS Deductions,
the risk of any Inclusion Event (each as defined in the Tax Indemnity
Agreement), and the risk of any sales, use, value added or similar tax resulting
from such transfer, (R) the transferor Owner Participant pays all of the costs
and expenses (including, without limitation, fees and expenses of counsel)
incurred in connection with such transfer, including the costs and expenses of
the Owner Trustee, the Indenture Trustee, Lessee and the Loan Participants in
connection therewith, and (S) the terms of the Operative Documents and the
Overall Transaction shall not be altered. Upon any such transfer by the Owner
Participant as above provided, the Transferee shall be deemed the Owner
Participant for all purposes hereof and of the other Operative Documents and
each reference herein to the transferor Owner Participant shall thereafter be
deemed for all purposes to be to the Transferee and the transferor Owner
Participant shall be relieved of all obligations of the transferor Owner
Participant under the Owner Participant Documents arising after the date of such
transfer except to the extent fully attributable to or arising out of acts or
events occurring prior thereto and not assumed by the Transferee (in each case,
to the extent of the participation so transferred). If the Owner Participant
intends to transfer any of its interests hereunder, it shall give 30 days prior
written notice thereof to the Indenture Trustee, the Owner Trustee and Lessee,
specifying the name and address of the proposed Transferee.

            (o) Notwithstanding the provisions of Section 8(x) hereof, unless
waived by the Loan Participants, Lessee shall not be entitled to assume the
Secured Certificates on the date for purchase of the Aircraft pursuant to
Section 19(d) of the Lease if on such date an Event of Default shall have
occurred and be continuing or any condition or event shall exist which, with the
passage of time or giving of notice or both, would become such an Event of
Default.

            (p) First Security Bank, National Association, and State Street Bank
and Trust Company, each in its individual capacity, agrees for the benefit of
Lessee to comply with the terms of the Trust Indenture which it is required to
comply with in its individual capacity.

            (q) The Owner Participant represents and warrants that it is not
acquiring its interest in the Trust Estate, any Secured Certificate or any
interests represented thereby with the


                                      -25-
<PAGE>

assets of any "employee benefit plan" as defined in Section 3(3) of ERISA or of
any "plan" within the meaning of Section 4975(e)(1) of the Code. Each Loan
Participant agrees that it will not transfer any Secured Certificate (or any
part thereof) to any entity (except pursuant to Section 2.14 of the Trust
Indenture) unless such entity makes (or is deemed to have made) a representation
and warranty as of the date of transfer that either no part of the funds to be
used by it for the purchase and holding of such Secured Certificate (or any part
thereof) constitutes assets of any "employee benefit plan" or that such purchase
and holding will not result in a non-exempt prohibited transaction (under
Section 4975 of the Code and Section 406 of ERISA). The Owner Participant agrees
that it will not transfer any of its right, title or interest in and to this
Agreement, the Trust Estate or the Trust Agreement or any proceeds therefrom to
any entity unless such entity makes (or is deemed to have made) a representation
and warranty as of the date of transfer that either no part of the funds to be
used by it for the purchase of such right, title and interest (or any part
thereof) constitutes assets of any "employee benefit plan" or that such transfer
will not result in a non-exempt prohibited transaction (under Section 4975 of
the Code and Section 406 of ERISA). The Pass Through Trustee agrees that it will
not agree to any amendment, modification or waiver of Section 1.01(e)(i) of the
Trust Supplement to each Pass Through Trust Agreement specified in Schedule III
hereto without the prior written consent of the Owner Participant.

            (r) Each Participant, the Owner Trustee and the Indenture Trustee
agrees for the benefit of the Manufacturer and Lessee that it will not disclose
or suffer to be disclosed the terms of the Purchase Agreement to any third party
except (A) as may be required by any applicable statute, court or administrative
order or decree or governmental ruling or regulation or to any regulatory
authorities having official jurisdiction over them, (B) in connection with the
financing of the Aircraft and the other transactions contemplated by the
Operative Documents (including any transfer of Secured Certificates (including
by way of participation or assignment of an interest, provided such participant
or assignee agrees to hold such terms confidential to the same extent as herein
provided) or the Owner Participant's beneficial interest in the Trust Estate and
any exercise of remedies under the Lease and the Trust Indenture), (C) with the
prior written consent of the Manufacturer and Lessee, (D) to the Owner
Trustee's, the Indenture Trustee's and each Participant's counsel or special
counsel, independent insurance brokers or other agents who agree to hold such
information confidential, or (E) in the case of the Owner Participant and/or the
Owner Trustee, it may disclose so much of the Purchase Agreement as has been
assigned to the Owner Trustee under the Purchase Agreement Assignment to bona
fide potential purchasers of the Aircraft.

            (s) The Owner Trustee and the Owner Participant severally, not
jointly, represent and warrant that none of the funds made available by the Pass
Through Trustee pursuant to Section 1 hereof will be used for the purpose of
purchasing or carrying any "margin security" as defined in Regulation U of the
Board of Governors of the Federal Reserve System or for the purpose of reducing
or retiring any indebtedness which was originally incurred to purchase or carry
such margin security or for any other purpose which might cause the transaction
contemplated by this Agreement to constitute a "purpose credit" within the
meaning of Regulation X of the Board of Governors of the Federal Reserve System,
assuming that the proceeds were and are applied as contemplated by the
provisions of this Agreement.


                                      -26-
<PAGE>

            (t) Each Loan Participant covenants and agrees that it shall not
cause or permit to exist a Loan Participant Lien attributable to it with respect
to the Aircraft or any other portion of the Trust Estate. Each Loan Participant
agrees that it will promptly, at its own expense, take such other action as may
be necessary duly to discharge such Loan Participant Lien attributable to it.
Each Loan Participant agrees to make restitution to the Trust Estate for any
actual diminution of the assets of the Trust Estate resulting from such Loan
Participant Lien attributable to it.

            (u) State Street Bank and Trust Company, in its individual capacity,
covenants and agrees that it shall not cause or permit to exist any Indenture
Trustee's Liens with respect to the Trust Indenture Estate or the Trust Estate.
State Street Bank and Trust Company, in its individual capacity, agrees that it
will promptly, at its own expense, take such action as may be necessary duly to
discharge such Indenture Trustee's Liens. State Street Bank and Trust Company,
in its individual capacity, agrees to make restitution to the Trust Estate for
any actual diminution of the assets of the Trust Indenture Estate or the Trust
Estate resulting from such Indenture Trustee's Liens.

            (v) The Owner Trustee, in its individual capacity (except as
provided in clauses (iii) and (vii) below) and (but only as provided in clauses
(iii) and (vii) and, to the extent that it relates to the Owner Trustee, clauses
(ii), (ix) and (xi) below) as Owner Trustee, represents and warrants to Lessee,
the Guarantor, the Pass Through Trustee, the Subordination Agent, the Liquidity
Provider and the Owner Participant that:

            (i) the Owner Trustee, in its individual capacity, is a national
      banking association duly organized and validly existing in good standing
      under the laws of the United States, has full corporate power and
      authority to carry on its business as now conducted, has the corporate
      power and authority to execute and deliver the Trust Agreement, has the
      corporate power and authority to carry out the terms of the Trust
      Agreement, and has (assuming the authorization, execution and delivery of
      the Trust Agreement by the Owner Participant), as Owner Trustee, and to
      the extent expressly provided herein or therein, in its individual
      capacity, the corporate power and authority to execute and deliver and to
      carry out the terms of this Agreement, the Trust Indenture, the Secured
      Certificates, the Lease and each other Operative Document (other than the
      Trust Agreement) to which it is a party;

            (ii) the Owner Trustee in its trust capacity and, to the extent
      expressly provided herein, in its individual capacity, has duly
      authorized, executed and delivered this Agreement, in its individual
      capacity, has duly authorized, executed and delivered the Trust Agreement
      and in its trust capacity, except as expressly provided therein, has duly
      authorized, executed and delivered the other Owner Trustee Documents and
      (assuming the due authorization, execution and delivery of the Trust
      Agreement by the Owner Participant) this Agreement and each of the other
      Owner Trustee Documents constitute the legal, valid and binding
      obligations of the Owner Trustee, in its individual capacity or as Owner
      Trustee, as the case may be, enforceable against it in its individual
      capacity or as Owner Trustee, as the case may be, in accordance with its
      terms, except as the same may be limited by applicable bankruptcy,
      insolvency, reorganization,


                                      -27-
<PAGE>

      moratorium or similar laws affecting the rights of creditors generally and
      by general principles of equity, whether considered in a proceeding at law
      or in equity;

            (iii) assuming the due authorization, execution and delivery of the
      Trust Agreement by the Owner Participant, the Owner Trustee has duly
      authorized, and on the Delivery Date shall have duly issued, executed and
      delivered to the Indenture Trustee for authentication, the Secured
      Certificates pursuant to the terms and provisions hereof and of the Trust
      Indenture, and each Secured Certificate on the Delivery Date will
      constitute the valid and binding obligation of the Owner Trustee and will
      be entitled to the benefits and security afforded by the Trust Indenture
      in accordance with the terms of such Secured Certificate and the Trust
      Indenture;

            (iv) neither the execution and delivery by the Owner Trustee, in its
      individual capacity or as Owner Trustee, as the case may be, of any Owner
      Trustee Document, nor the consummation by the Owner Trustee, in its
      individual capacity or as Owner Trustee, as the case may be, of any of the
      transactions contemplated thereby, nor the compliance by the Owner
      Trustee, in its individual capacity or as Owner Trustee, as the case may
      be, with any of the terms and provisions thereof, (A) requires or will
      require any approval of its stockholders, or approval or consent of any
      trustees or holders of any indebtedness or obligations of it, or (B)
      violates or will violate its articles of association or by-laws, or
      contravenes or will contravene any provision of, or constitutes or will
      constitute a default under, or results or will result in any breach of, or
      results or will result in the creation of any Lien (other than as
      permitted under the Operative Documents) upon its property under, any
      indenture, mortgage, chattel mortgage, deed of trust, conditional sale
      contract, bank loan or credit agreement, license or other agreement or
      instrument to which it is a party or by which it is bound, or contravenes
      or will contravene any law, governmental rule or regulation of the United
      States of America or the State of Utah governing the trust powers of the
      Owner Trustee, or any judgment or order applicable to or binding on it;

            (v) no consent, approval, order or authorization of, giving of
      notice to, or registration with, or taking of any other action in respect
      of, any Utah state or local governmental authority or agency or any United
      States federal governmental authority or agency regulating the trust
      powers of the Owner Trustee in its individual capacity is required for the
      execution and delivery of, or the carrying out by, the Owner Trustee, in
      its individual capacity or as Owner Trustee, as the case may be, of any of
      the transactions contemplated hereby or by the Trust Agreement, the
      Participation Agreement, the Trust Indenture, the Lease or the Secured
      Certificates, or any other Operative Document to which it is a party or by
      which it is bound, other than any such consent, approval, order,
      authorization, registration, notice or action as has been duly obtained,
      given or taken or which is described in Section 7(a)(iv);

            (vi) there exists no Lessor Lien (including for this purpose Liens
      which would be Lessor Liens but for the proviso in the definition of
      Lessor Liens) attributable to the Owner Trustee, in its individual
      capacity;


                                      -28-
<PAGE>

            (vii) there exists no Lessor Lien (including for this purpose Liens
      which would be Lessor Liens but for the proviso in the definition of
      Lessor Liens) attributable to the Owner Trustee, as lessor under the
      Lease;

            (viii) there are no Taxes payable by the Owner Trustee, either in
      its individual capacity or as Owner Trustee, imposed by the State of Utah
      or any political subdivision thereof in connection with the issuance of
      the Secured Certificates, or the execution and delivery in its individual
      capacity or as Owner Trustee, as the case may be, of any of the
      instruments referred to in clauses (i), (ii), (iii) and (iv) above, that,
      in each case, would not have been imposed if the Trust Estate were not
      located in the State of Utah and First Security Bank, National Association
      had not (a) had its principal place of business in, (b) performed (in its
      individual capacity or as Owner Trustee) any or all of its duties under
      the Operative Documents in, and (c) engaged in any activities unrelated to
      the transactions contemplated by the Operative Documents in, the State of
      Utah;

            (ix) there are no pending or, to its knowledge, threatened actions
      or proceedings against the Owner Trustee, either in its individual
      capacity or as Owner Trustee, before any court or administrative agency
      which, if determined adversely to it, would materially adversely affect
      the ability of the Owner Trustee, in its individual capacity or as Owner
      Trustee, as the case may be, to perform its obligations under any of the
      instruments referred to in clauses (i), (ii), (iii) and (iv) above;

            (x) both its chief executive office, and the place where its records
      concerning the Aircraft and all its interests in, to and under all
      documents relating to the Trust Estate, are located in Salt Lake City,
      Utah;

            (xi) the Owner Trustee has not, in its individual capacity or as
      Owner Trustee, directly or indirectly offered any Secured Certificate or
      Certificate or any interest in or to the Trust Estate, the Trust Agreement
      or any similar interest for sale to, or solicited any offer to acquire any
      of the same from, anyone other than the Pass Through Trustee and the Owner
      Participant; and the Owner Trustee has not authorized anyone to act on its
      behalf (it being understood that in arranging and proposing the financing
      contemplated hereby and agreed to herein by the Owner Trustee, the Lessee
      has not acted as agent of the Owner Trustee) to offer directly or
      indirectly any Secured Certificate, any Certificate or any interest in and
      to the Trust Estate, the Trust Agreement or any similar interest for sale
      to, or to solicit any offer to acquire any of the same from, any Person;

            (xii) it is a Citizen of the United States (without making use of a
      voting trust agreement, voting powers agreement or similar arrangements);
      and

            (xiii) there has not occurred any event which constitutes (or, to
      the best of its knowledge would, with the passing of time or the giving of
      notice or both, constitute) an Event of Default as defined in the Trust
      Indenture which has been caused by or relates to the Owner Trustee, in its
      individual capacity, and which is presently continuing.

            (w) The Owner Participant covenants and agrees that if (i) Lessee
has elected pursuant to Section 9(a)(2) of the Lease to terminate the Lease by
causing the Aircraft to be sold


                                      -29-
<PAGE>

pursuant to Section 9(c) of the Lease and (ii) the Owner Trustee has, pursuant
to Section 9(c) of the Lease, given to Lessee written notice of Lessor's
election to retain title to the Aircraft and (iii) the Owner Trustee has failed
to make, on or before the Termination Date, any payment required to be made by
the Owner Trustee pursuant to Section 9(c) in connection with its retention of
title to the Aircraft, the Owner Participant will indemnify Lessee for any
losses, damages, costs or expenses of any kind (including any additional rents
paid by Lessee and any fees and expenses of lawyers, appraisers, brokers or
accountants) incurred as a consequence of such failure by the Owner Trustee. The
Owner Participant further covenants and agrees to pay those costs and expenses
specified to be paid by the Owner Participant pursuant to Exhibit E to the
Lease.

            (x) Each of the Owner Participant, the Owner Trustee, the Indenture
Trustee and Lessee covenants and agrees that if Lessee elects to terminate the
Lease and purchase the Aircraft pursuant to Section 19(d) of the Lease, then
each of the parties will execute and deliver appropriate documentation
transferring all right, title and interest in the Aircraft to Lessee (including,
without limitation, such bills of sale and other instruments and documents as
Lessee shall reasonably request to evidence (on the public record or otherwise)
such transfer and the vesting of all right, title and interest in and to the
Aircraft in Lessee), and if Lessee, in connection with such purchase, elects to
assume the obligations of the Owner Trustee pursuant to the Trust Indenture and
the Secured Certificates each of the parties will execute and deliver
appropriate documentation permitting Lessee to assume such obligations on the
basis of full recourse to Lessee, maintaining the security interest in the
Aircraft created by the Trust Indenture, releasing the Owner Participant and the
Owner Trustee from all future obligations in respect of the Secured
Certificates, the Trust Indenture and all other Operative Documents and all such
other actions as are reasonably necessary to permit such assumption by Lessee.

            Notwithstanding the foregoing, Lessee shall not be entitled to
assume the obligations of the Owner Trustee in respect of the Secured
Certificates unless Lessee causes to be delivered to the Indenture Trustee an
opinion of counsel to the effect that (i) the Lien of the Trust Indenture
continues to be a valid and duly perfected first priority security interest in
and to the Aircraft, (ii) the Indenture Trustee should be entitled to the
benefits of 11 U.S.C. ss.1110; provided that the opinion required by subclause
(ii) need only be given if immediately prior to such assumption the Owner
Trustee should have been entitled to the benefits of 11 U.S.C. ss.1110 and (iii)
the Pass Through Trusts will not be subject to Federal income taxation and the
Certificate Holders will not recognize income, gain or loss for Federal income
tax purposes as a result of such assumption and will be subject to Federal
income tax in the same amounts, in the same manner, and at the same time as
would have been the case if such assumption had not occurred.

            (y) (A) Lessee will not consolidate with or merge into any other
corporation or convey, transfer or lease substantially all of its assets as an
entirety to any Person unless:

            (i) the corporation formed by such consolidation or into which
      Lessee is merged or the Person which acquires by conveyance, transfer or
      lease substantially all of the assets of Lessee as an entirety shall be a
      Certificated Air Carrier;


                                      -30-
<PAGE>

            (ii) the corporation formed by such consolidation or into which
      Lessee is merged or the Person which acquires by conveyance, transfer or
      lease substantially all of the assets of Lessee as an entirety shall
      execute and deliver to the Owner Trustee, the Indenture Trustee and the
      Owner Participant an agreement in form and substance reasonably
      satisfactory to the Indenture Trustee and the Owner Participant containing
      an assumption by such successor corporation or Person of the due and
      punctual performance and observance of each covenant and condition of this
      Agreement, the Lease, the Purchase Agreement Assignment and the Tax
      Indemnity Agreement to be performed or observed by Lessee;

            (iii) immediately after giving effect to such transaction, no
      Default or Event of Default under the Lease shall have occurred and be
      continuing; and

            (iv) Lessee shall have delivered to the Owner Trustee, the Indenture
      Trustee and the Owner Participant a certificate signed by the President,
      any Executive Vice President, any Senior Vice President, the Treasurer or
      any Vice President and by the Secretary or an Assistant Secretary of
      Lessee, and an opinion of counsel reasonably satisfactory to the Indenture
      Trustee and the Owner Participant, each stating that such consolidation,
      merger, conveyance, transfer or lease and the assumption agreement
      mentioned in clause (ii) above comply with this subparagraph (A) of
      Section 8(y) and that all conditions precedent herein provided for
      relating to such transaction have been complied with.

            Upon any such consolidation or merger or any such conveyance,
transfer or lease of substantially all of the assets of Lessee as an entirety in
accordance with this subparagraph (A) of Section 8(y), the successor corporation
or Person formed by such consolidation or into which Lessee is merged or to
which such conveyance, transfer or lease is made shall succeed to, and be
substituted for, and may exercise every right and power of, Lessee under this
Agreement with the same effect as if such successor corporation or Person had
been named as Lessee herein. No such conveyance, transfer or lease of
substantially all of the assets of Lessee as an entirety shall have the effect
of releasing Lessee or any successor corporation or Person which shall
theretofore have become such in the manner prescribed in this subparagraph (A)
of Section 8(y) from its liability in respect of any Operative Document to which
it is a party.

                  (B) Lessee shall at all times maintain its corporate existence
except as permitted by subparagraph (A) of this Section 8(y).

            (z) Lessee, at its expense, will take, or cause to be taken, such
action with respect to the recording, filing, re-recording and refiling of the
Lease, the Lease Supplement, the Trust Agreement, the Trust Indenture, the Trust
Supplement and any financing statements or other instruments as are necessary to
maintain, so long as the Trust Indenture or the Lease is in effect, the
perfection of the security interests created by the Trust Indenture and any
security interest that may be claimed to have been created by the Lease and the
interest of the Owner Trustee in the Aircraft or will furnish to the Owner
Trustee and the Indenture Trustee timely notice of the necessity of such action,
together with such instruments, in execution form, and such other information as
may be required to enable them to take such action. Lessee will notify the Owner
Trustee, the Owner Participant and the Indenture Trustee of any change in the


                                      -31-
<PAGE>

location of its chief executive office (as such term is used in Article 9 of the
Uniform Commercial Code) promptly after making such change or in any event
within the period of time necessary under applicable law to prevent the lapse of
perfection (absent refiling) of financing statements filed under the Operative
Documents.

            (aa) Section 3 of the Lease contemplates that, under certain
circumstances, the Owner Participant will make certain recalculations of Basic
Rent, the Special Purchase Price, [the Initial Installment, the Remaining
Installments,] Stipulated Loss Value percentages and Termination Value
percentages, and the Owner Participant hereby agrees to make such recalculations
as and when contemplated by the Lease and subject to all the terms and
conditions of the Lease and promptly to take such further actions as may be
necessary or desirable to give effect to and to cause the Owner Trustee to give
effect to the provisions of Section 3 of the Lease.

            (bb) The Owner Participant hereby agrees with Lessee that it will
pay, or cause to be paid, all costs and expenses that are for the account of the
Owner Trustee pursuant to Section 5(d) of the Lease.

            (cc) Each Loan Participant hereby represents, warrants and agrees
that it shall not transfer any interest in any Secured Certificate unless and
until the transferee agrees in writing (copies of which shall be provided by the
Indenture Trustee to Lessee, the Owner Trustee and the Owner Participant) to
make the representations contemplated to be made by a Loan Participant in this
Agreement and to be bound by the terms of this Agreement and the Trust Indenture
(including, without limitation, the representations and covenants set forth in
Sections 8(e), 8(k), 8(l), 8(q), and 8(t) hereof and this Section 8(cc) and
Sections 2.03, 2.14 and 4.03 of the Trust Indenture).

            (dd) The Pass Through Trustee represents and warrants to Lessee, the
Guarantor, the Indenture Trustee, the Subordination Agent, the Liquidity
Provider, the Owner Participant and the Owner Trustee, in its capacity as such
and in its individual capacity, as follows:

            (i) the Pass Through Trustee is a duly organized national banking
      association, validly existing and in good standing with the Comptroller of
      the Currency under the laws of the United States, has the full power,
      authority and legal right under the laws of the United States pertaining
      to its banking, trust and fiduciary powers to execute and deliver each of
      the Pass Through Trust Agreements, the Intercreditor Agreement and this
      Agreement and to perform its obligations under the Pass Through Trust
      Agreements, the Intercreditor Agreement and this Agreement, and has its
      chief executive office located in Hartford, Connecticut;

            (ii) this Agreement, each of the Pass Through Trust Agreements and
      the Intercreditor Agreement have been duly authorized, executed and
      delivered by the Pass Through Trustee; this Agreement, each of the Pass
      Through Trust Agreements and the Intercreditor Agreement constitute the
      legal, valid and binding obligations of the Pass Through Trustee
      enforceable against it in accordance with their respective terms, except
      as the same may be limited by applicable bankruptcy, insolvency,
      reorganization,


                                      -32-
<PAGE>

      moratorium or similar laws affecting the rights of creditors generally and
      by general principles of equity, whether considered in a proceeding at law
      or in equity;

            (iii) none of the execution, delivery and performance by the Pass
      Through Trustee of any of the Pass Through Trust Agreements, the
      Intercreditor Agreement or this Agreement, the purchase by the Pass
      Through Trustee of the Secured Certificates pursuant to this Agreement, or
      the issuance of the Certificates pursuant to the Pass Through Trust
      Agreements, contravenes any law, rule or regulation of the State of
      Connecticut or any United States governmental authority or agency
      regulating the Pass Through Trustee's banking, trust or fiduciary powers
      or any judgment or order applicable to or binding on the Pass Through
      Trustee and does not contravene or result in any breach of, or constitute
      a default under, the Pass Through Trustee's articles of association or
      by-laws or any agreement or instrument to which the Pass Through Trustee
      is a party or by which it or any of its properties may be bound;

            (iv) neither the execution and delivery by the Pass Through Trustee
      of any of the Pass Through Trust Agreements, the Intercreditor Agreement
      or this Agreement, nor the consummation by the Pass Through Trustee of any
      of the transactions contemplated hereby or thereby, requires the consent
      or approval of, the giving of notice to, the registration with, or the
      taking of any other action with respect to, any Connecticut governmental
      authority or agency or any federal governmental authority or agency
      regulating the Pass Through Trustee's banking, trust or fiduciary powers;

            (v) there are no Taxes payable by the Pass Through Trustee imposed
      by the State of Connecticut or any political subdivision or taxing
      authority thereof in connection with the execution, delivery and
      performance by the Pass Through Trustee of this Agreement, any of the Pass
      Through Trust Agreements or the Intercreditor Agreement (other than
      franchise or other taxes based on or measured by any fees or compensation
      received by the Pass Through Trustee for services rendered in connection
      with the transactions contemplated by any of the Pass Through Trust
      Agreements), and there are no Taxes payable by the Pass Through Trustee
      imposed by the State of Connecticut or any political subdivision thereof
      in connection with the acquisition, possession or ownership by the Pass
      Through Trustee of any of the Secured Certificates (other than franchise
      or other taxes based on or measured by any fees or compensation received
      by the Pass Through Trustee for services rendered in connection with the
      transactions contemplated by any of the Pass Through Trust Agreements),
      and, assuming that for federal income tax purposes the trusts created by
      the Pass Through Trust Agreements will not be taxable as corporations, but
      rather, each will be characterized as a grantor trust under subpart E,
      Part I, of Subchapter J of the Code or as a partnership, such trusts will
      not be subject to any Taxes imposed by the State of Connecticut or any
      political subdivision thereof;

            (vi) there are no pending or threatened actions or proceedings
      against the Pass Through Trustee before any court or administrative agency
      which individually or in the aggregate, if determined adversely to it,
      would materially adversely affect the ability of the Pass Through Trustee
      to perform its obligations under this Agreement, the Intercreditor
      Agreement or any Pass Through Trust Agreement;


                                      -33-
<PAGE>

            (vii) except for the issue and sale of the Certificates, the Pass
      Through Trustee has not directly or indirectly offered any Secured
      Certificate for sale to any Person or solicited any offer to acquire any
      Secured Certificates from any Person, nor has the Pass Through Trustee
      authorized anyone to act on its behalf to offer directly or indirectly any
      Secured Certificate for sale to any Person, or to solicit any offer to
      acquire any Secured Certificate from any Person; and the Pass Through
      Trustee is not in default under any Pass Through Trust Agreement; and

            (viii) the Pass Through Trustee is not directly or indirectly
      controlling, controlled by or under common control with the Owner
      Participant, the Owner Trustee, any Underwriter, Lessee or the Guarantor.

            (ee) The Subordination Agent represents and warrants to Lessee, the
Guarantor, the Indenture Trustee, the Pass Through Trustee, the Liquidity
Provider, the Owner Participant and the Owner Trustee, in its capacity as such
and in its individual capacity, as follows:

            (i) the Subordination Agent is duly incorporated, validly existing
      and in good standing under the laws of the Commonwealth of Massachusetts,
      and has the full corporate power, authority and legal right under the laws
      of the Commonwealth of Massachusetts and the United States pertaining to
      its banking, trust and fiduciary powers to execute and deliver each of the
      Liquidity Facilities, the Intercreditor Agreement and this Agreement and
      to perform its obligations under this Agreement, the Liquidity Facilities
      and the Intercreditor Agreement;

            (ii) this Agreement, each of the Liquidity Facilities and the
      Intercreditor Agreement have been duly authorized, executed and delivered
      by the Subordination Agent; this Agreement, each of the Liquidity
      Facilities and the Intercreditor Agreement constitute the legal, valid and
      binding obligations of the Subordination Agent enforceable against it in
      accordance with their respective terms, except as the same may be limited
      by applicable bankruptcy, insolvency, reorganization, moratorium or
      similar laws affecting the rights of creditors generally and by general
      principles of equity, whether considered in a proceeding at law or in
      equity;

            (iii) none of the execution, delivery and performance by the
      Subordination Agent of each of the Liquidity Facilities, the Intercreditor
      Agreement or this Agreement contravenes any law, rule or regulation of the
      Commonwealth of Massachusetts or any United States governmental authority
      or agency regulating the Subordination Agent's banking, trust or fiduciary
      powers or any judgment or order applicable to or binding on the
      Subordination Agent and do not contravene or result in any breach of, or
      constitute a default under, the Subordination Agent's articles of
      association or by-laws or any agreement or instrument to which the
      Subordination Agent is a party or by which it or any of its properties may
      be bound;

            (iv) neither the execution and delivery by the Subordination Agent
      of any of the Liquidity Facilities, the Intercreditor Agreement or this
      Agreement nor the consummation by the Subordination Agent of any of the
      transactions contemplated


                                      -34-
<PAGE>

      hereby or thereby requires the consent or approval of, the giving of
      notice to, the registration with, or the taking of any other action with
      respect to, any Massachusetts governmental authority or agency or any
      federal governmental authority or agency regulating the Subordination
      Agent's banking, trust or fiduciary powers;

            (v) there are no Taxes payable by the Subordination Agent imposed by
      the Commonwealth of Massachusetts or any political subdivision or taxing
      authority thereof in connection with the execution, delivery and
      performance by the Subordination Agent of this Agreement, any of the
      Liquidity Facilities or the Intercreditor Agreement (other than franchise
      or other taxes based on or measured by any fees or compensation received
      by the Subordination Agent for services rendered in connection with the
      transactions contemplated by the Intercreditor Agreement or any of the
      Liquidity Facilities), and there are no Taxes payable by the Subordination
      Agent imposed by the Commonwealth of Massachusetts or any political
      subdivision thereof in connection with the acquisition, possession or
      ownership by the Subordination Agent of any of the Secured Certificates
      (other than franchise or other taxes based on or measured by any fees or
      compensation received by the Subordination Agent for services rendered in
      connection with the transactions contemplated by the Intercreditor
      Agreement or any of the Liquidity Facilities);

            (vi) there are no pending or threatened actions or proceedings
      against the Subordination Agent before any court or administrative agency
      which individually or in the aggregate, if determined adversely to it,
      would materially adversely affect the ability of the Subordination Agent
      to perform its obligations under this Agreement, the Intercreditor
      Agreement or any Liquidity Facility;

            (vii) the Subordination Agent has not directly or indirectly offered
      any Secured Certificate for sale to any Person or solicited any offer to
      acquire any Secured Certificates from any Person, nor has the
      Subordination Agent authorized anyone to act on its behalf to offer
      directly or indirectly any Secured Certificate for sale to any Person, or
      to solicit any offer to acquire any Secured Certificate from any Person;
      and the Subordination Agent is not in default under any Liquidity
      Facility; and

            (viii) the Subordination Agent is not directly or indirectly
      controlling, controlled by or under common control with the Owner
      Participant, the Owner Trustee, any Underwriter, Lessee or the Guarantor.

            SECTION 9. Reliance of Liquidity Provider. Each of the parties
hereto agrees and acknowledges that the Liquidity Provider shall be a third
party beneficiary of each of the representations and warranties made herein by
such party, and that the Liquidity Provider may rely on such representations and
warranties to the same extent as if such representations and warranties were
made to the Liquidity Provider directly. Lessee agrees and acknowledges that the
Liquidity Provider shall be a third party beneficiary of the indemnities
contained in Section 7(c) hereof, and may rely on such indemnities to the same
extent as if such indemnities were made to the Liquidity Provider directly.


                                      -35-
<PAGE>

            SECTION 10. Other Documents. Each of the Owner Participant and the
Owner Trustee hereby (A) agrees with Lessee and the Loan Participants to comply
with all of the terms of the Trust Agreement (as the same may hereafter be
amended or supplemented from time to time in accordance with the terms thereof)
applicable to it; (B) agrees with Lessee and the Indenture Trustee not to amend,
supplement or otherwise modify any provision of the Trust Agreement in a manner
adversely affecting such party without the prior written consent of such party;
and (C) agrees with Lessee and the Loan Participants not to revoke the Trust
Agreement without the prior written consent of Lessee (so long as the Lease
remains in effect) and the Indenture Trustee (so long as the Lien of the Trust
Indenture remains in effect or there are any Secured Certificates outstanding).
Notwithstanding the foregoing, so long as the Lease has not been terminated, the
Indenture Trustee and the Owner Trustee hereby agree for the benefit of Lessee
that without the consent of Lessee they will not (i) amend or modify Article III
or IX of the Trust Indenture, (ii) make any amendment which will affect the
stated principal amount or interest on the Secured Certificates or (iii) amend
or modify the provisions of Sections 2.05 or 10.14 of the Trust Indenture. The
Indenture Trustee and the Owner Trustee agree to promptly furnish to Lessee
copies of any supplement, amendment, waiver or modification of any of the
Operative Documents to which Lessee is not a party. Notwithstanding anything to
the contrary contained herein, in the Trust Agreement or in any other Operative
Document, the Owner Participant will not consent to or direct a change in the
situs of the Trust Estate without the prior written consent of Lessee. Each Loan
Participant agrees that it will not take any action in respect of the Trust
Indenture Estate except through the Indenture Trustee pursuant to the Trust
Indenture or as otherwise permitted by the Trust Indenture.

            SECTION 11. Certain Covenants of Lessee. Lessee covenants and agrees
with each of the Loan Participants, the Owner Participant, the Indenture Trustee
and the Owner Trustee, in its capacity as such and in its individual capacity as
follows:

            (a) Lessee will cause to be done, executed, acknowledged and
delivered all and every such further acts, conveyances and assurances as the
Owner Trustee, the Indenture Trustee or the Owner Participant shall reasonably
require for accomplishing the purposes of this Agreement and the other Operative
Documents; provided that any instrument or other document so executed by Lessee
will not expand any obligations or limit any rights of Lessee in respect of the
transactions contemplated by any Operative Documents. Lessee, forthwith upon
delivery of the Aircraft under the Lease, shall cause the Aircraft to be duly
registered, and at all times thereafter to remain duly registered, in the name
of the Owner Trustee, except as otherwise required or permitted hereunder or
under the Lease, under the Federal Aviation Act, or shall furnish to the Owner
Trustee such information as may be required to enable the Owner Trustee to make
application for such registration, and shall promptly furnish to the Owner
Trustee such information as may be required to enable the Owner Trustee to
timely file any reports required to be filed by it as the lessor under the Lease
or as the owner of the Aircraft with any governmental authority.

            (b) Lessee will cause the Lease, all Lease Supplements, all
amendments to the Lease, the Trust Indenture, all supplements and amendments to
the Trust Indenture and this Agreement to be promptly filed and recorded, or
filed for recording, to the extent permitted under the Federal Aviation Act, or
required under any other applicable law. Upon the execution and delivery of the
FAA Bill of Sale, the Lease, the Lease Supplement covering the Aircraft, the


                                      -36-
<PAGE>

Trust Supplement and the Trust Indenture shall be filed for recording with the
Federal Aviation Administration in the following order of priority; first, the
FAA Bill of Sale, second, the Lease, with the Lease Supplement covering the
Aircraft, the Trust Indenture and the Trust Supplement attached, and third, the
Trust Indenture, with the Trust Supplement attached.

            SECTION 12. Owner for Federal Tax Purposes. It is hereby agreed
among Lessee, the Owner Participant and the Owner Trustee that for Federal
income tax purposes the Owner Participant will be the owner of the Aircraft to
be delivered under the Lease and Lessee will be the lessee thereof, and each
party hereto agrees to characterize the Lease as a lease for Federal income tax
purposes.

            SECTION 13. Certain Definitions; Notices; Consent to Jurisdiction.
(a) Except as otherwise defined in this Agreement, terms used herein in
capitalized form shall have the meanings attributed thereto in the Lease. The
term "Trust Office" shall have the meaning set forth in the Trust Agreement.
Unless the context otherwise requires, any reference herein to any of the
Operative Documents refers to such document as it may be amended from time to
time.

            (b) All notices, demands, instructions and other communications
required or permitted to be given to or made upon any party hereto or to the
Guarantor shall be in writing and shall be personally delivered or sent by
registered or certified mail, postage prepaid, or by telecopier, or by prepaid
courier service, and shall be deemed to be given for purposes of this Agreement
on the day that such writing is delivered or sent to the intended recipient
thereof in accordance with the provisions of this Section 13(b). Unless
otherwise specified in a notice sent or delivered in accordance with the
foregoing provisions of this Section 13(b), notices, demands, instructions and
other communications in writing shall be given to or made upon the respective
parties hereto at their respective addresses (or to their respective telecopier
numbers) as follows: (A) if to Lessee, the Guarantor, the Owner Trustee, the
Pass Through Trustee, the Subordination Agent, the Indenture Trustee or the
Owner Participant, to the respective addresses set forth below the signatures of
such parties at the foot of this Agreement, or (B) if to a subsequent Owner
Participant, addressed to such subsequent Owner Participant at such address as
such subsequent Owner Participant shall have furnished by notice to the parties
hereto, or (C) if to any subsequent Certificate Holder, addressed to such
Certificate Holder at its address set forth in the Secured Certificate register
maintained pursuant to Section 2.07 of the Trust Indenture.

            (c) Each of the parties hereto (A) hereby irrevocably submits itself
to the non-exclusive jurisdiction of the United States District Court for the
Southern District of New York and to the non-exclusive jurisdiction of the
Supreme Court of the State of New York, New York County, for the purposes of any
suit, action or other proceeding arising out of this Agreement, the Lease, the
Tax Indemnity Agreement or any other Operative Document, the subject matter of
any thereof or any of the transactions contemplated hereby or thereby brought by
any party or parties thereto, or their successors or assigns, and (B) hereby
waives, and agrees not to assert, by way of motion, as a defense, or otherwise,
in any such suit, action or proceeding, to the extent permitted by applicable
law, that the suit, action or proceeding is brought in an inconvenient forum,
that the venue of the suit, action or proceeding is improper, or that this
Agreement, the Lease, the Tax Indemnity Agreement or any other Operative
Document or the subject matter of any thereof or any of the transactions
contemplated hereby or thereby may not be enforced in or


                                      -37-
<PAGE>

by such courts. Lessee hereby generally consents to service of process at
Cadwalader, Wickersham & Taft, 100 Maiden Lane, New York, New York 10038,
Attention: Managing Attorney, or such office of Lessee in New York City as from
time to time may be designated by Lessee in writing to the Owner Participant,
the Owner Trustee and the Indenture Trustee.

            SECTION 14. Change of Situs of Owner Trust. The Owner Participant
agrees that if, at any time, the Trust Estate becomes subject to any Taxes for
which it is indemnified pursuant to Section 7(b) hereof and if, as a consequence
thereof, Lessee should request that the situs of the trust be moved to another
state in the United States from the state in which it is then located, the situs
of the trust may be moved with the written consent of the Owner Participant
(which consent shall not be unreasonably withheld) and the Owner Participant
will take whatever action may be reasonably necessary to accomplish such
removal; provided that (A) Lessee shall provide such additional tax
indemnification as the Owner Participant and the Indenture Trustee may
reasonably request, (B) the rights and obligations under the Operative Documents
of the Owner Participant and the Indenture Trustee shall not be altered as a
result of the taking of such action, (C) the lien of the Trust Indenture on the
Trust Indenture Estate shall not be adversely affected by such action, (D) the
Owner Participant and the Indenture Trustee shall have received an opinion or
opinions of counsel (satisfactory to the Owner Participant and the Indenture
Trustee), in scope, form and substance satisfactory to the Owner Participant and
the Indenture Trustee to the effect that (I) the trust, as thus removed, shall
remain a validly established trust, (II) any amendments to the Trust Agreement
necessitated by such removal shall have been duly authorized, executed and
delivered by the parties thereto and shall constitute the valid and binding
obligations of such parties, enforceable in accordance with their terms, (III)
such removal will not result in the imposition of, or increase in the amount of,
any Tax for which Lessee is not required to indemnify the Owner Participant, the
Indenture Trustee, the Owner Trustee or the Trust Estate pursuant to Section
7(b) hereof (taking into account any additional indemnification provided by
Lessee pursuant to clause (A) of this sentence), and (IV) such removal will not
result in any loss of Interest Deductions or MACRS Deductions or an Inclusion
Event (as defined in the Tax Indemnity Agreement) with respect to which Lessee
is not required to indemnify the Owner Participant pursuant to Section 4 of the
Tax Indemnity Agreement (taking into account any additional indemnification
provided by Lessee pursuant to clause (A) of this sentence), (E) if such removal
involves the replacement of the Owner Trustee, the Indenture Trustee and the
Owner Participant shall have received an opinion of counsel to such successor
Owner Trustee in form and substance reasonably satisfactory to the Indenture
Trustee and to the Owner Participant covering the matters described in the
opinion delivered pursuant to Section 4(a)(xiii) hereof and such other matters
as the Indenture Trustee and the Owner Participant may reasonably request, and
(F) Lessee shall indemnify and hold harmless the Owner Participant and the
Indenture Trustee on a net after-tax basis against any and all reasonable and
actual costs and expenses including reasonable counsel fees and disbursements,
registration fees, recording or filing fees and taxes incurred by the Owner
Trustee, the Owner Participant and the Indenture Trustee in connection with such
change of situs.

            SECTION 15. Miscellaneous. (a) The Owner Participant covenants and
agrees that it shall not unreasonably withhold its consent to any consent
requested of the Owner Trustee, as Lessor, under the terms of the Lease which by
its terms is not to be unreasonably withheld by the Owner Trustee, as Lessor.


                                      -38-
<PAGE>

            (b) The representations, warranties, indemnities and agreements of
Lessee, the Guarantor, the Owner Trustee, the Indenture Trustee, the
Subordination Agent, the Pass Through Trustee and the Owner Participant provided
for in this Agreement, and Lessee's, the Guarantor's, the Owner Trustee's, the
Indenture Trustee's, the Subordination Agent's, the Pass Through Trustee's and
the Owner Participant's obligations under any and all thereof, shall survive the
making available of the respective Commitments by the Pass Through Trustee and
the Owner Participant, the delivery or return of the Aircraft, the transfer of
any interest of the Owner Participant in the Trust Estate or the Aircraft or any
Engine or the transfer of any interest by any Loan Participant in any Secured
Certificate or the Trust Indenture Estate and the expiration or other
termination of this Agreement or any other Operative Document.

            (c) This Agreement may be executed by the parties hereto in separate
counterparts, each of which when so executed and delivered shall be an original,
but all such counterparts shall together constitute but one and the same
instrument. Neither this Agreement nor any of the terms hereof may be
terminated, amended, supplemented, waived or modified, except by an instrument
in writing signed by the party against which the enforcement of the termination,
amendment, supplement, waiver or modification is sought; and no such
termination, amendment, supplement, waiver or modification shall be effective
unless a signed copy thereof shall have been delivered to the Indenture Trustee
and the Owner Trustee. The terms of this Agreement shall be binding upon, and
inure to the benefit of, Lessee and, subject to the terms of this Agreement, its
successors and permitted assigns, the Guarantor, the Pass Through Trustee and
its successors as Pass Through Trustee (and any additional trustee appointed)
under any of the Pass Through Trust Agreements, the Owner Participant and,
subject to the terms of this Agreement, its successors and permitted assigns,
each Certificate Holder and its successors and registered assigns, the Indenture
Trustee and its successors as Indenture Trustee under the Trust Indenture and
the Owner Trustee and its successors as Owner Trustee under the Trust Agreement.
The terms of this Agreement shall inure to the benefit of the Liquidity
Provider, its successors and permitted assigns. THIS AGREEMENT SHALL IN ALL
RESPECTS BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE
OF NEW YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE.
THIS AGREEMENT IS BEING DELIVERED IN THE STATE OF NEW YORK.

            (d) The parties hereto agree that all of the statements,
representations, covenants and agreements made by the Owner Trustee (when made
in such capacity) contained in this Agreement and any agreement referred to
herein other than the Trust Agreement, unless expressly otherwise stated, are
made and intended only for the purpose of binding the Trust Estate and
establishing the existence of rights and remedies which can be exercised and
enforced against the Trust Estate. Therefore, anything contained in this
Agreement or such other agreements to the contrary notwithstanding (except for
any express provisions that the Owner Trustee is responsible for in its
individual capacity), no recourse shall be had with respect to this Agreement or
such other agreements against the Owner Trustee in its individual capacity or
against any institution or person which becomes a successor trustee or
co-trustee or any officer, director, trustee, servant or direct or indirect
parent or controlling person or persons of any of them; provided, however, that
this Section 15(d) shall not be construed to prohibit any action or proceeding
against any party hereto for its own willful misconduct or grossly negligent
conduct for which it would otherwise be liable; and provided, further, that
nothing contained in this


                                      -39-
<PAGE>

Section 15(d) shall be construed to limit the exercise and enforcement in
accordance with the terms of this Agreement or such other agreements of rights
and remedies against the Trust Estate. The foregoing provisions of this Section
15(d) shall survive the termination of this Agreement and the other Operative
Documents.

            (e) It is the intention of the parties hereto that the Owner
Trustee, as Lessor under the Lease, and the Indenture Trustee, as assignee of
such Owner Trustee's rights under the Lease pursuant to the Trust Indenture,
will be entitled to the benefits of 11 U.S.C. ss. 1110 in the event of any
reorganization of Lessee under Chapter 11 of the Bankruptcy Code.

            SECTION 16. Expenses. (a) Invoices and Payment. Each of the parties
hereto shall promptly submit to the Owner Trustee and Lessee for their prompt
approval (which shall not be unreasonably withheld) copies of invoices in
reasonable detail of the Transaction Expenses for which it is responsible for
providing information as they are received (but in no event later than
[________________]). The Owner Participant agrees to transfer to the Owner
Trustee promptly but in any event no later than [______________] such amount as
shall be necessary in order to enable the Owner Trustee to pay Transaction
Expenses. To the extent of funds received by it, the Owner Trustee agrees to pay
all invoices of Transaction Expenses that have been approved by it and Lessee
promptly upon receipt thereof. Notwithstanding the foregoing, to the extent that
Transaction Expenses exceed [___]% of Lessor's Cost, Lessee at its sole option
shall have the right to pay directly any or all Transaction Expenses which are
in excess of [____]% of Lessor's Cost.

            (b) Payment of Other Expenses. In the event that the transaction
contemplated by this Participation Agreement fails to close as a result of the
Owner Participant's failure to negotiate in good faith or to comply with the
terms and conditions upon which its participation in the transaction was
predicated, the Owner Participant will be responsible for all of its fees and
expenses, including but not limited to the fees, expenses and disbursements of
its special counsel.

            SECTION 17. Refinancings.

            (a) So long as no Event of Default shall have occurred and be
continuing, Lessee shall have the right to refinance all (but not less than all)
of the Secured Certificates no more than three times by giving written notice to
the Owner Participant and the Owner Trustee that there be effected a voluntary
redemption of the Secured Certificates by the Owner Trustee, whereupon the Owner
Participant agrees to negotiate promptly in good faith to conclude an agreement
with Lessee as to the terms of such refinancing operation (including the terms
of any debt to be issued in connection with such refinancing); provided that no
such refinancing shall require an increase in the amount of the Owner
Participant's investment in the beneficial ownership of the Aircraft.

            Upon such agreement:

            (1) within ten Business Days after the reaching of such agreement,
the Owner Participant will deliver to Lessee a certificate of an authorized
representative of the Owner Participant (the "Refinancing Certificate") setting
forth (i) the proposed date on which the


                                      -40-
<PAGE>

outstanding Secured Certificates will be redeemed, any new debt will be issued
and the other aspects of such refinancing will be consummated (such date, the
"Refinancing Date") and (ii) the following information calculated pursuant to
the provisions of paragraph (6) of this Section 17(a): (A) subject to the
limitations set forth in this Section 17, the proposed adjusted debt/equity
ratio, (B) the principal amount of debt to be issued by the Owner Trustee on the
Refinancing Date, (C) the amount, if any, by which the Owner Participant's
aggregate investment in the beneficial interest in the Aircraft is to be
decreased and (D) the proposed revised schedules of Basic Rent percentages, debt
amortization, Special Purchase Price, [Initial Installment, Remaining
Installments,] Stipulated Loss Value percentages and Termination Value
percentages. The Refinancing Certificate shall not provide for a debt/equity
ratio of more than 4:1. Within fourteen days of its receipt of the Refinancing
Certificate, Lessee may demand a verification pursuant to Exhibit E to the Lease
of the information set forth in the Refinancing Certificate. Upon the acceptance
by Lessee of the accuracy of the information set forth in the Refinancing
Certificate (or the determination pursuant to such verification procedures), as
to the debt/equity ratio, the principal amount of debt to be issued by the Owner
Trustee on the Refinancing Date and the revised Basic Rent percentages, debt
amortization, Special Purchase Price, [Initial Installment, Remaining
Installments,] Stipulated Loss Value percentages and Termination Value
percentages (such information, whether as set forth or as so determined, the
"Refinancing Information") the appropriate parties will take the actions
specified in paragraphs (2) through (5) below;

            (2) the appropriate parties will enter into appropriate
documentation (which may involve an underwriting agreement in connection with
such sale or the sale of the Owner Trustee's interest in the Trust Estate and/or
the Aircraft and its resale to the Owner Trustee) with the institution or
institutions to be named therein providing for (i) the issuance and sale by the
Owner Trustee to such institution or institutions on the Refinancing Date of
debt securities in an aggregate principal amount specified in the Refinancing
Information which amount shall be equal to the aggregate principal amount of all
Secured Certificates outstanding on the Refinancing Date (such debt securities,
the "New Debt") except that the principal amount of New Debt may exceed the
principal amount of all outstanding Secured Certificates in connection with the
first refinancing under this Section 17, (ii) the application of the proceeds of
the sale of the New Debt to the redemption of all such Secured Certificates on
the Refinancing Date and (iii) the payment of the excess, if any, of such
proceeds over the amounts necessary to effect such redemption to the Owner
Trustee;

            (3) Lessee shall give the notice to the Indenture Trustee pursuant
to Section 2.11 of the Trust Indenture, and Lessee and the Owner Trustee will
amend the Lease to provide that (i) Basic Rent payable in respect of the period
from and after the Refinancing Date shall be as provided in the Refinancing
Information and (ii) amounts payable in respect of the Special Purchase Price,
[Initial Installments, Remaining Installments,] Stipulated Loss Value and
Termination Value from and after the Refinancing Date shall be as provided in
the Refinancing Information;

            (4) the Owner Trustee will enter into an agreement to provide for
the securing thereunder of the New Debt in like manner as the Secured
Certificates and will enter into such amendments and supplements to the Trust
Indenture (or such new indenture or other security agreement) as may be
necessary to effect such refinancing;


                                      -41-
<PAGE>

            (5) the Owner Participant shall pay all of the expenses (other than
those of Lessee) of such refinancing (including, but not limited to, the fees,
expenses and disbursements of counsel and any placement or underwriting fees)
and such expenses shall be treated as Transaction Expenses; and

            (6) when calculating any of the information required to be set forth
in a Refinancing Certificate, the Owner Participant shall make such calculations
in a manner which (A) maintains the Owner Participant's Net Economic Return
(except to the extent the assumptions referred to in the definition of "Net
Economic Return" have been altered since the Delivery Date in connection with an
adjustment to Rents pursuant to Section 3(d) of the Lease or such assumptions
are the subject of the recalculations being conducted by the Owner Participant),
and (B) minimizes the Net Present Value of Rents to Lessee to the extent
possible consistent with clause (A).

            (b) The Secured Certificates shall not be subject to voluntary
redemption by the Owner Trustee without the consent of Lessee except as set
forth in Section 2.14 of the Trust Indenture.


                                      -42-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed by their respective officers thereunto duly authorized as of
the day and year first above written.

                                       NORTHWEST AIRLINES, INC.,
                                          Lessee

                                       By:____________________________________
                                       Name:
                                       Title:
                                       Address: U.S.  Mail
                                                5101 Northwest Drive (A4010)
                                                St. Paul, Minnesota 55111-3034

                                                Overnight Courier
                                                2700 Lone Oak Parkway (A4010)
                                                Eagan, Minnesota 55121
                                       Attn:    Treasurer
                                       Telecopy No.: (612) 726-0665


                                       NORTHWEST AIRLINES CORPORATION,
                                          Guarantor

                                       By:____________________________________
                                       Name:
                                       Title:
                                       Address: U.S.  Mail
                                                5101 Northwest Drive (A4010)
                                                St. Paul, Minnesota 55111-3034

                                                Overnight Courier
                                                2700 Lone Oak Parkway (A4010)
                                                Eagan, Minnesota 55121
                                       Attn:    Treasurer
                                       Telecopy No.: (612) 726-0665


                               - Signature Page -
<PAGE>

                                       [__________________________],
                                       Owner Participant

                                       By:____________________________________
                                       Name:
                                       Title:
                                       Address:
                                       Attn:
                                       Telecopy No.:


                                       STATE STREET BANK AND
                                       TRUST COMPANY,
                                       Indenture Trustee

                                       By:  __________________________________
                                       Name:
                                       Title:
                                       Address: U.S. Mail
                                                Corporate Trust Department
                                                P.O. Box 778
                                                Boston, Massachusetts 02102-0778

                                                Overnight Courier
                                                Corporate Trust Department
                                                2 Avenue de Lafayette
                                                Boston, Massachusetts 02111-1724
                                       Telecopy No.: (617) 662-1462


                                       FIRST SECURITY BANK, NATIONAL
                                       ASSOCIATION, not in its individual
                                       capacity, except as expressly provided
                                       herein, but solely as Owner Trustee,
                                       Owner Trustee

                                       By:____________________________________
                                       Name:
                                       Title:
                                       Address: 79 South Main Street
                                                Salt Lake City, Utah 84111
                                       Attn:    Corporate Trust Department
                                       Telecopy No.: (801) 246-5053


                               - Signature Page -
<PAGE>

                                       STATE STREET BANK AND TRUST COMPANY OF
                                       CONNECTICUT, NATIONAL ASSOCIATION, not in
                                       its individual capacity, except as
                                       otherwise provided herein, but solely as
                                       Pass Through Trustee, Pass Through
                                       Trustee

                                       By:  __________________________________
                                       Name:
                                       Title:
                                       Address: 225 Asylum Street, Goodwin
                                       Square
                                                Hartford, CT  06103
                                       Attn:    Corporate/Muni Department
                                       Telecopy No.: (860) 244-1889


                                       STATE STREET BANK AND TRUST COMPANY, not
                                       in its individual capacity, except as
                                       otherwise provided herein, but solely as
                                       Subordination Agent, Subordination Agent

                                       By:____________________________________
                                       Name:
                                       Title:
                                       Address: U.S. Mail
                                                Corporate Trust Department
                                                P.O. Box 778
                                                Boston, Massachusetts 02102-0778

                                                Overnight Courier
                                                Corporate Trust Department
                                                2 Avenue de Lafayette
                                                Boston, Massachusetts 02111-1724
                                       Telecopy No.: (617) 662-1462


                               - Signature Page -
<PAGE>

                                   SCHEDULE I
                               Names and Addresses

Lessee:                    Northwest Airlines, Inc.

                           U.S. Mail
                           5101 Northwest Drive (A4010)
                           St. Paul, Minnesota 55111-3034

                           Overnight Courier
                           2700 Lone Oak Parkway (A4010)
                           Eagan, Minnesota 55121
                           Attn: Treasurer
                           Telecopy No.: (612) 726-0665

                           Wire Transfer

                           USBank, Minneapolis
                           ABA No. 091000022
                           Acct. No. 150250099440

Owner Participant:         [__________________________]
                           Attn: _____________________
                           Telecopy No.:______________

                           with a copy to:

                           [Address]
                           Attn: _____________________
                           Telecopy No.: _____________

                           Payments made
                           to the Owner Participant as provided in Section
                           3.06 of the Trust Indenture shall be made to:

                           [Bank]
                           [Address] New York, New York
                           ABA No. ___________________
                           Account No. _______________
                           Account Name: _____________
                           Reference: ________________


                              SCHEDULE I - PAGE 1
<PAGE>

Indenture Trustee:         State Street Bank and Trust Company

                           U.S. Mail
                           Corporate Trust Department
                           P.O. Box 778
                           Boston, Massachusetts 02102-0778

                           Overnight Courier
                           Corporate Trust Department
                           2 Avenue de Lafayette
                           Boston, Massachusetts  02111-1724
                           Telecopy No.: (617) 662-1462

                           Wire Transfer

                           State Street Bank and Trust Company
                           ABA No. 011-000-028
                           for credit to State Street Bank and Trust Company
                           Acct. No. 9903-990-1
                           Attn: Corporate Trust Department
                           Reference: Northwest/NW [____ _]

Owner Trustee:             First Security Bank, National Association
                           79 South Main Street
                           Salt Lake City, Utah 84111
                           Attn: Corporate Trust Department
                           Telecopy No.: (801) 246-5053

                           Payments made to the Owner Trustee as provided in
                           Section 3(f) of the Lease shall be made to:

                           First Security Bank, National Association
                           ABA No. 124-0000-12
                           Acct. No. 051-0922115
                           Attn: Corporate Trust Department
                           Credit: Northwest/NW [____ _]

Loan Participant:          State Street Bank and Trust Company
                            of Connecticut, National Association
                           225 Asylum Street, Goodwin Square
                           Hartford, CT 06103
                           Attn: Corporate/Muni Department
                           Telecopy No.: (860) 244-1889


                              SCHEDULE I - PAGE 2
<PAGE>

Subordination Agent:       State Street Bank and Trust Company

                           U.S. Mail
                           Corporate Trust Department
                           P.O. Box 778
                           Boston, Massachusetts 02102-0778

                           Overnight Courier
                           Corporate Trust Department
                           2 Avenue de Lafayette
                           Boston, Massachusetts  02111-1724
                           Telecopy No.: (617) 662-1462


                               SCHEDULE I - PAGE 3
<PAGE>

                                   SCHEDULE II
                                   Commitments

                        Interest Rate                           Percentage of
    Purchasers          and Maturity         Purchase Price     Lessor's Cost
    ----------          ------------         --------------     -------------

Northwest Airlines
Pass Through Trust

                   7.575% Series A
                   Secured Certificates due
   1999-2A         [___________]              $[___________]     [___________]%

                   7.950% Series B
                   Secured Certificates due
   1999-2B         [___________]              $[___________]     [___________]%

                   8.304% Series C
                   Secured Certificates due
   1999-2C         [___________]              $[___________]     [___________]%

Owner Participant                             Equity Investment
- -----------------                             -----------------

[___________]                                 $[___________]     [___________]%

                   Total Commitments          $[___________]     100%


                              SCHEDULE II - PAGE 1
<PAGE>

                                  SCHEDULE III
                          Pass Through Trust Agreements

1.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2A, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

2.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2B, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

3.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2C, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.


                              SCHEDULE III - PAGE 1
<PAGE>

                                                                       EXHIBIT A
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                     [NW ____ _]

                    SCHEDULE OF COUNTRIES FOR REREGISTRATION

Argentina                               Malta
Australia                               Mexico
Austria                                 Morocco
Bahamas                                 Netherlands
Belgium                                 New Zealand
Brazil                                  Norway
Canada                                  Paraguay
Chile                                   People's Republic of China
Denmark                                 Philippines
Egypt                                   Portugal
Finland                                 Republic of China (Taiwan)
France                                  Singapore
Germany                                 South Africa
Greece                                  South Korea
Hungary                                 Spain
Iceland                                 Sweden
India                                   Switzerland
Indonesia                               Thailand
Ireland                                 Trinidad and Tobago
Italy                                   United Kingdom
Japan                                   Uruguay
Luxembourg                              Venezuela
Malaysia


                               EXHIBIT A - PAGE 1
<PAGE>

                                                                       EXHIBIT K
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                     [NW ____ _]

                      Section 7(b) - General Tax Indemnity

      (b)   General Tax Indemnity.

      (i) Indemnity. Except as provided in Section 7(b)(ii) hereof, Lessee shall
pay, protect, save and on written demand shall indemnify and hold harmless any
Tax Indemnitee from and against any and all Taxes howsoever imposed against any
Tax Indemnitee, Lessee or the Aircraft, the Airframe, any Engine or any Part
thereof or interest therein by any Federal, state or local government or other
taxing authority in the United States or by any foreign government or any
political subdivision or taxing authority thereof or by any territory or
possession of the United States or by any international authority ("Taxing
Authority") upon or in connection with or relating to (A) the construction,
financing, refinancing, purchase, acquisition, acceptance, rejection, delivery,
nondelivery, transport, ownership, registration, reregistration, insuring,
assembly, possession, repossession, operation, location, use, control,
condition, maintenance, repair, sale, return, abandonment, installation,
storage, redelivery, replacement, manufacture, leasing, subleasing,
modification, rebuilding, importation, transfer of title, transfer of
registration, exportation or other application or disposition of the Aircraft,
the Airframe, any Engine or any Part thereof or interest therein, (B) the
rentals, receipts or earnings from the Aircraft, the Airframe, any Engine or any
Part, (C) any amount paid or payable pursuant to any Operative Document or any
document related thereto or the property or the income or other proceeds with
respect to any of the property held in the Trust Estate or the Trust Indenture
Estate, (D) the Aircraft, the Airframe, any Engine or any Part, (E) any or all
of the Operative Documents, or the issuance of the Secured Certificates (or the
refinancing thereof) and any other documents contemplated hereby or thereby and
amendments and supplements hereto and thereto or the execution, delivery or
performance of any thereof or the issuance, acquisition, modification, holding
or subsequent transfer thereof, (F) the payment of the principal of, or interest
or Make-Whole Amount or other premium on, or other amounts payable with respect
to, the Secured Certificates or the Pass Through Certificates, or (G) otherwise
with respect to or in connection with the transactions contemplated by the
Operative Documents.

      (ii) Exclusions from General Tax Indemnity. The provisions of Section
7(b)(i) shall not apply:

            (1) with respect to any Tax Indemnitee to any Income Tax (as defined
      in Section 7(d) hereof) imposed by (A) the United States Federal
      government or (B) any U.S. state or local taxing jurisdiction;


                               EXHIBIT K - PAGE 1
<PAGE>

            (2) with respect to any Tax Indemnitee, to any Income Taxes imposed
      by any foreign or international government, jurisdiction or taxing
      authority or territory or possession of the United States except to the
      extent that such Tax Indemnitee would be subject to such Income Tax if the
      sole connection between such Tax Indemnitee and the Taxing Authority had
      been the location and operation of the Aircraft or the activities of
      Lessee or any sublessee within such Taxing Authority;

            (3) to any capital gains taxes, excess profits taxes, value added
      taxes, accumulated earnings taxes, personal holding company taxes,
      succession taxes or estate or similar taxes;

            (4) to any Tax imposed as a result of a transfer or disposition by a
      Tax Indemnitee including, without limitation, the revocation of the trust
      created by the Trust Agreement or a transfer or disposition of all or any
      portion of its respective equitable or legal ownership interest in the
      Aircraft, the Trust Estate, a Secured Certificate (including sales of
      participations therein), the Trust Indenture Estate (as defined in the
      Trust Indenture) or any Operative Document or any interest in such Tax
      Indemnitee, unless such transfer or disposition shall occur (A) pursuant
      to the exercise of remedies pursuant to Section 15 of the Lease or (B) in
      connection with the termination of the Lease or the action or direction of
      Lessee pursuant to Sections 9, 10 or 19 thereof;

            (5) to any Tax based on or measured by any fees received by the
      Owner Trustee, the Pass Through Trustee, the Indenture Trustee or any
      Agent in connection with any transaction contemplated by the Operative
      Documents;

            (6) to any Tax imposed with respect to events occurring or matters
      arising after the earlier of (x) the expiration of the Term or the earlier
      termination of the Lease pursuant to Section 9 or 19 thereof, (y) the
      return of possession of the Aircraft to the Owner Trustee or its designee
      pursuant to the terms of the Lease or (z) the commencement of storage
      pursuant to Section 5(d) of the Lease provided that this exclusion shall
      not apply to Taxes to the extent such Taxes are imposed on or with respect
      to any events or matters occurring or arising prior to such expiration,
      termination, return of possession of the Aircraft or storage;

            (7) to any Tax in the nature of an intangible or similar tax upon or
      with respect to the value or principal amount of the interest of any Tax
      Indemnitee in any of the Secured Certificates or in the Owner Trust;

            (8) with respect to any Tax Indemnitee to any Tax imposed on or with
      respect to a transferee (or subsequent transferee) of an original Tax
      Indemnitee to the extent such Taxes would not have been required to be
      withheld or imposed on or with respect to such original Tax Indemnitee;

            (9) to any Tax which would not have been imposed on (A) the Owner
      Trustee, the Trust Estate or the Owner Participant but for, a Lessor Lien


                               EXHIBIT K - PAGE 2
<PAGE>

      (including, for this purpose, Liens which would be a Lessor Lien but for
      the proviso in the definition of Lessor Liens) or (B) the Indenture
      Trustee but for an Indenture Trustee's Lien, in each case with respect to
      the Tax Indemnitee to whom such Lien is attributable;

            (10) to any Tax to the extent such Tax would not have been imposed
      but for a present or future connection between the Tax Indemnitee or any
      Affiliate thereof and the jurisdiction imposing such Taxes (including,
      without limitation, the Tax Indemnitee or an Affiliate thereof being or
      having been a citizen or resident thereof, or being or having been
      organized, present or engaged in a trade or business therein, or having or
      having had, a permanent establishment or fixed place of business therein,
      or engaging, or having engaged, in one or more transactions or activities
      therein unrelated to the transactions contemplated by the Operative
      Documents), other than a connection arising solely by reason of the
      transactions contemplated by the Operative Documents;

            (11) to any Tax imposed on a Tax Indemnitee to the extent imposed as
      a result of such Tax Indemnitee's failure to comply with any
      certification, information, documentation, reporting or similar procedure
      that is required by law, treaty or regulation as a condition to the
      allowance of any reduction in the rate of such Tax or any exemption or
      other relief from such Tax;

            (12) to any Tax on a Tax Indemnitee to the extent arising out of, or
      caused by, or to the extent such Tax would not have been incurred but for,
      (A) the willful misconduct or gross negligence of such Tax Indemnitee or
      any of its Affiliates or (B) the inaccuracy or breach of any
      representation, warranty, covenant or agreement by such Tax Indemnitee or
      any of its Affiliates in any Operative Document;

            (13) to any Tax on a Tax Indemnitee to the extent consisting of
      interest, penalties, fines or additions to Tax resulting from the
      negligence or willful misconduct of such Tax Indemnitee or any of its
      Affiliates in connection with the filing of, or failure to file, any tax
      return, the payment of, or failure to pay any Tax, or the conduct of any
      proceeding in respect thereof unless resulting from the failure by Lessee
      to perform its obligations under Section 7(b)(v) hereof; or

            (14) to any excise tax imposed on any Tax Indemnitee under Section
      4975 of the Internal Revenue Code as a result of the use by such Tax
      Indemnitee or any of its Affiliates of the assets of an "employee benefit
      plan" (as defined in Section 3(3) of ERISA) to purchase a Secured
      Certificate, make an equity investment or otherwise acquire any interest
      in the Trust Estate or any Secured Certificate.

      (iii) Calculation of General Tax Indemnity Payments. Any payment which
Lessee shall be required to make to or for the account of any Tax Indemnitee
with respect to any Tax which is subject to indemnification under this Section
7(b) shall be in an amount which, after reduction by the amount of all Taxes
required to be paid by such Tax


                               EXHIBIT K - PAGE 3
<PAGE>

Indemnitee in respect of the receipt or accrual of such amount and after
consideration of any current savings of such Tax Indemnitee resulting by way of
any deduction, credit or other tax benefit attributable to such indemnified Tax
that actually reduces any Taxes for which Lessee is not required to indemnify
such Tax Indemnitee pursuant to this Section 7(b) or the Tax Indemnity
Agreement, shall be equal to the payment otherwise required hereunder.

      If, by reason of any Tax payment made to or for the account of a Tax
Indemnitee by Lessee pursuant to this Section 7(b), such Tax Indemnitee or any
of its Affiliates subsequently realizes a tax deduction or credit (including a
foreign tax credit) not previously taken into account in computing such payment,
such Tax Indemnitee shall promptly pay to Lessee an amount equal to the sum of
(I) the actual reduction in Taxes, if any, realized by such Tax Indemnitee which
is attributable to such deduction or credit and (II) the actual reduction in
Taxes realized by such Tax Indemnitee as a result of any payment made by such
Tax Indemnitee pursuant to this sentence. For purposes of this Section
7(b)(iii), items of foreign Tax of any Tax Indemnitee shall be deemed to be
utilized by such Tax Indemnitee as credits or deductions for any taxable year in
accordance with the following priorities:

      First, all available foreign Taxes for which such Tax Indemnitee was not
      indemnified or held harmless by anyone;

      Second, all available foreign Taxes for which such Tax Indemnitee was
      indemnified or held harmless by Lessee, and all available foreign taxes
      indemnified under any other transaction (except any described in Clause
      Third), on a pari passu basis; and

      Third, any remaining foreign Taxes arising from any transaction in which
      there is an express agreement that such Taxes shall be utilized after
      foreign taxes from other transactions.

      Once the foreign Tax for which such Tax Indemnitee was indemnified by
Lessee is deemed to be utilized pursuant to the ordering rules contained in this
paragraph, it shall not subsequently be recharacterized as not having been
utilized as a result of a foreign tax liability arising in a subsequent year.

      Any Taxes that are imposed on any Tax Indemnitee as a result of the
disallowance or reduction of any tax benefit referred to in this subsection as
to which such Tax Indemnitee has made in full the payment to Lessee required
hereby (or as to which such Tax Indemnitee would have made its payment but for
Section 7(b)(viii) or which tax benefit was otherwise taken into account in
computing Lessee's indemnity obligation pursuant to this Section 7) in a taxable
year subsequent to the utilization by such Tax Indemnitee shall be treated as a
Tax for which Lessee is obligated to indemnify such Tax Indemnitee pursuant to
the provisions of this Section 7(b), without regard to the exclusions set forth
in Section 7(b)(ii) hereof (other than clauses (12) or (13) thereto).


                               EXHIBIT K - PAGE 4
<PAGE>

      Each Tax Indemnitee shall in good faith use reasonable efforts in filing
its tax returns and in dealing with Taxing Authorities to seek and claim any tax
savings which would result in payments to Lessee under this Section 7(b).

      (iv) General Tax Indemnity--Contests. At Lessee's request Lessee shall be
entitled at its sole cost and expense (A) in the case of a contest involving
only Taxes indemnified hereunder ("Indemnified Taxes") or (B) in any proceeding
involving a claim for one or more Indemnified Taxes as well as a claim for other
Taxes, where the contest of the claim for Indemnified Taxes can be severed from
the contest of other Taxes, to assume responsibility for and control of the
contest ("Lessee Controlled Contest"). Unless otherwise required by law, any
such contest shall be conducted by and in the name of Lessee. If a written claim
shall be made against and received by any Tax Indemnitee for any Tax for which
Lessee is obligated pursuant to this Section 7(b), such Tax Indemnitee shall
notify Lessee promptly of such claim (it being understood and agreed that
failure to provide such notice shall not adversely affect or otherwise prejudice
any Tax Indemnitee's right to indemnity under this Section 7(b) except to the
extent such failure has a materially adverse effect on the ability to contest
such claim). If the Tax cannot be contested in a Lessee Controlled Contest, upon
request from Lessee within thirty (30) days after receipt of such notice, such
Tax Indemnitee shall in good faith at Lessee's sole cost and expense contest the
imposition of such Tax (a "Tax Indemnitee Controlled Contest"). After consulting
with Lessee and Lessee's counsel concerning the forum in which the adjustment is
most likely to be favorably resolved, such Tax Indemnitee may select in its sole
discretion after considering in good faith Lessee's and Lessee's counsel
recommendation the forum for such contest and determine whether any such contest
shall be by (A) resisting payment of such Tax, (B) paying such Tax under protest
or (C) paying such Tax and seeking a refund or other repayment thereof. Except
as otherwise provided in clause (Z) below, during the pendency of a contest
pursuant to this Section 7(b)(iv) Lessee may withhold payment of any Tax to the
extent provided by applicable law. In no event shall such Tax Indemnitee be
required, or Lessee be permitted, to contest the imposition of any Tax for which
Lessee is obligated pursuant to this Section 7(b) unless (W) no Event of Default
shall have occurred and be continuing (unless Lessee shall have provided
security reasonably satisfactory to such Tax Indemnitee securing Lessee's
performance of its obligations under this Section 7(b)), (X) Lessee shall have
agreed to pay to such Tax Indemnitee on demand all reasonable costs and expenses
on an after-tax basis that such Tax Indemnitee may incur in connection with
contesting such claim (including, without limitation, all reasonable legal and
accounting fees), (Y) such action to be taken will not result in a material risk
of sale, forfeiture or loss of, or the creation of any Lien on, the Aircraft,
the Engines or any Part, other than Permitted Liens, unless Lessee shall have
provided such Tax Indemnitee security against such risk in form and amount
reasonably acceptable to such Tax Indemnitee, and (Z) if such contest shall be
conducted in a manner requiring the payment of the claim, Lessee shall have paid
the amount required directly to the appropriate authority or made an advance of
the amount thereof to such Tax Indemnitee on an interest-free basis and agreed
to indemnify such Tax Indemnitee on an after-tax basis against any Taxes payable
by such Tax Indemnitee with respect to such advance.


                               EXHIBIT K - PAGE 5
<PAGE>

      Notwithstanding anything to the contrary in this Section 7(b), in any Tax
Indemnitee Controlled Contest the Tax Indemnitee may not settle or agree to any
claim without the prior written consent of Lessee, and the Tax Indemnitee shall
conduct any such administrative proceedings and judicial contest in good faith
in an attempt to minimize the amount payable by Lessee under this Section 7(b).
The term "after-tax basis" for purposes of this Section 7(b) shall mean an
amount which, after deduction of all Taxes required to be paid by or on behalf
of the Tax Indemnitee in respect of the receipt or accrual of such amount, is
equal to the payment required under the provisions of this Section 7(b) which
require payments to be made on an after-tax basis.

      If any Tax Indemnitee shall obtain a refund of all or any part of any Tax
paid by Lessee, such Tax Indemnitee shall pay Lessee an amount equal to the
amount of such refund, including interest received attributable thereto, plus
any net tax benefit (or minus any net tax detriment) realized by such Tax
Indemnitee as a result of any refund received and payment by such Tax Indemnitee
made pursuant to this sentence.

      Nothing contained in this Section 7(b)(iv) shall require any Tax
Indemnitee to contest, or permit Lessee to contest, a claim which such Tax
Indemnitee would otherwise be required to contest pursuant to this Section
7(b)(iv), if such Tax Indemnitee shall waive payment by Lessee of any amount
that might otherwise be payable by Lessee under this Section 7(b) in respect of
such claim and any other claim, the contest of which would be adversely
affected.

      (v) General Tax Indemnity--Reports. If any report, return or statement is
required to be filed with respect to any Tax which is subject to indemnification
under this Section 7(b), Lessee shall timely file the same at its sole expense
(except for any such report, return or statement which the Tax Indemnitee has
notified Lessee that the Tax Indemnitee intends to file or which the Tax
Indemnitee is required by law to file in its own name). Lessee shall have no
obligation under the preceding sentence if such Tax Indemnitee, after receipt of
Lessee's written request, shall have failed to furnish Lessee with such
information in a timely fashion as is in such Tax Indemnitee's control and is
not otherwise reasonably available to Lessee and is necessary to file such
returns. Lessee shall either file such report, return or statement so as to show
the ownership of the Aircraft in the Owner Trustee and send a copy of such
report, return or statement to the Tax Indemnitee and Owner Trustee or, where
Lessee is not so permitted to file such report, return or statement, it shall
notify the Tax Indemnitee of such requirement and prepare and deliver such
report, return or statement to the Tax Indemnitee in a manner satisfactory to
such Tax Indemnitee within a reasonable time prior to the time such report,
return or statement is to be filed. Lessee shall provide to the Owner
Participant upon request (or shall cause to be provided to the Owner Participant
upon request) such information maintained in the regular course of Lessee's
business and shall make available for inspection and copying by the Owner
Participant, at Lessee's expense, such records as Lessee retains in the regular
course of its business, or is required under applicable law to retain, as shall
be reasonably necessary for the Owner Participant to prepare or support any
required Federal, state, local or foreign tax returns or other filings, or to
comply with audit or litigation requirements. The Owner Participant shall
provide to Lessee upon request (or shall cause to be provided to Lessee on
request) such


                               EXHIBIT K - PAGE 6
<PAGE>

information related to the Overall Transaction maintained in the regular course
of the Owner Participant's business, and shall make available (or shall cause to
be made available) for inspection and copying by Lessee, at the Owner
Participant's expense, such records related to the Overall Transaction as the
Owner Participant or the Owner Trustee retain in the regular course of their
business or are required by law to retain, as shall be necessary for Lessee to
prepare or support any required Federal, state, local or foreign returns or
other filings or to comply with audit or litigation requirements.

      (vi) Verification. At Lessee's written request after Lessee receives a Tax
Indemnitee's computations showing the amount of any indemnity payable by Lessee
to such Tax Indemnitee pursuant to this Section 7(b) or any amount payable by
any Tax Indemnitee to Lessee pursuant to this Section 7(b), such computations
shall be subject to confidential verification in writing by any nationally
recognized firm of certified public accountants selected by Lessee and
reasonably acceptable to such Tax Indemnitee. The accounting firm shall complete
its review within thirty (30) days of Lessee's receipt of such Tax Indemnitee's
computations. The computations of such accounting firm shall (i) be delivered
simultaneously to Lessee and such Tax Indemnitee and (ii) absent manifest error,
be final, binding and conclusive upon Lessee and such Tax Indemnitee. If Lessee
pays such indemnity in whole or in part before completion of the verification
procedure, appropriate adjustments will be made promptly after completion of the
verification procedure (and nothing in this Section 7(b)(vi) shall be construed
as changing the time when any such indemnity is payable under this Section 7(b))
to take into account any redetermination of the indemnity by the accounting
firm. The fee and disbursements of such firm shall be paid by Lessee unless such
verification shall disclose an error made by such Tax Indemnitee in favor of
such Tax Indemnitee exceeding the lesser of five percent (5%) of the original
claim or $10,000, in which case such fee and disbursements shall be paid by such
Tax Indemnitee. Such Tax Indemnitee shall cooperate with such accounting firm
and (subject to such accounting firm's execution of a confidentiality agreement
satisfactory to such Tax Indemnitee) shall supply such accounting firm with all
information reasonably necessary to permit accomplishment of such review and
determination. The sole responsibility of such accounting firm shall be to
verify the computations of the amount payable hereunder and the interpretation
of this Agreement shall not be within the scope of such accounting firm's
responsibilities.

      (vii) General Tax Indemnity--Payment. Except as provided in Section
7(b)(iv) hereof, Lessee shall pay any Tax for which it is liable pursuant to
this Section 7(b) directly to the appropriate taxing authority if legally
permissible or upon demand of a Tax Indemnitee shall pay such Tax and any other
amounts due hereunder to such Tax Indemnitee within fifteen (15) Business Days
of such demand, but in no event shall any such payments be required to be made
by Lessee more than five (5) Business Days prior to the date the Tax to which
any such payment hereunder relates is due in immediately available funds. Any
such demand for payment from a Tax Indemnitee shall specify in reasonable detail
the payment and the facts upon which the right to payment is based. Each Tax
Indemnitee shall promptly forward to Lessee any notice, bill or advice received
by it concerning any Tax, provided, however, that the failure of any Tax
Indemnitee to forward any such notice, bill or advice shall not adversely affect
or otherwise prejudice such Tax Indemnitee's rights to indemnification under
this Section 7(b) unless such


                               EXHIBIT K - PAGE 7
<PAGE>

failure materially adversely affects the ability to contest any claim reflected
therein. Within thirty (30) days after the date of each payment by Lessee of any
Tax indemnified against hereunder, Lessee shall furnish the appropriate Tax
Indemnitee the original or a certified copy of a receipt for Lessee's payment of
such Tax or such other evidence of payment of such Tax as is reasonably
acceptable to such Tax Indemnitee.

      (viii) Application of Payments During Existence of Event of Default. Any
amount payable to Lessee pursuant to the terms of this Section 7(b) shall not be
paid to or retained by Lessee if at the time of such payment or retention an
Event of Default shall have occurred and be continuing under the Lease. At such
time as there shall not be continuing any such Event of Default, such amount
shall be paid to the Lessee to the extent not previously applied against
Lessee's obligations hereunder as and when due after the Owner Trustee shall
have declared the Lease in default pursuant to Section 15 thereof.

      (ix) Reimbursements by Tax Indemnitees Generally. If, for any reason,
Lessee is required to make any payment with respect to any Taxes imposed on any
Tax Indemnitee, any Pass Through Trustee, any Loan Participant or the
Subordination Agent in respect of the transactions contemplated by the Operative
Documents or on the Aircraft, the Airframe, the Engines or any Part, which Taxes
are not the responsibility of Lessee under this Section 7(b), then such Tax
Indemnitee, Pass Through Trustee, Loan Participant or the Subordination Agent,
as the case may be, shall pay to Lessee an amount which equals the amount paid
by Lessee with respect to such Taxes plus interest thereon computed at an annual
interest rate equal to the Base Rate plus one percent from the date of payment
by Lessee.

      (x) Forms, etc. Each Tax Indemnitee agrees to furnish to Lessee from time
to time such duly executed and properly completed forms that are requested by
Lessee or that the Tax Indemnitee knows, or has reason to know in the ordinary
course of its business, may be necessary or appropriate in order to claim any
reduction of or exemption from any withholding tax imposed by any taxing
authority in respect of any payments otherwise required to be made by Lessee
pursuant to the Operative Documents, which reduction or exemption may be
available to such Tax Indemnitee.

      (xi) Non-Parties. If a Tax Indemnitee is not a party to this Agreement,
Lessee may require the Tax Indemnitee to agree to the terms of this Section 7(b)
prior to making any payment to such Tax Indemnitee under this Section 7(b).


                               EXHIBIT K - PAGE 8
<PAGE>

                                                                       EXHIBIT L
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                     [NW ____ _]

                        Section 7(c) - General Indemnity

            (c)   General Indemnity. Lessee hereby agrees to indemnify each
Indemnitee against, and agrees to protect, defend, save and keep harmless each
thereof from (whether or not the transactions contemplated herein or in any of
the other Operative Documents are consummated), any and all liabilities,
obligations, losses, damages, penalties, claims, actions, suits, out-of-pocket
costs, expenses and disbursements (including reasonable legal fees and expenses
and Transaction Expenses to the extent not required to be paid by the Owner
Trustee or the Owner Participant pursuant to Section 16 hereof but excluding
internal costs and expenses such as salaries and overhead), of whatsoever kind
and nature (collectively called "Expenses") imposed on, incurred by or asserted
against any Indemnitee, in any way relating to or arising out of (A) any of the
Operative Documents or any sublease or sub-sublease of the Aircraft or the
enforcement of any of the terms thereof or any amendment, modification or waiver
in respect thereof and, only in the case of the Indemnitee who is the
Subordination Agent or the Liquidity Provider, the Intercreditor Agreement and
the Liquidity Facilities, (B) the manufacture, purchase, acceptance or rejection
of the Airframe or any Engine, (C) the Aircraft (or any portion thereof or any
Engine or engine affixed to the Airframe) whether or not arising out of the
finance, refinance, ownership, delivery, nondelivery, storage, lease, sublease,
sub-sublease, possession, use, non-use, operation, maintenance, registration,
reregistration, condition, modification, alteration, replacement, repair,
substitution, sale, return or other disposition of the Aircraft (or any portion
thereof or any Engine or engine affixed to the Airframe) including, without
limitation, latent or other defects, whether or not discoverable, strict tort
liability and any claim for patent, trademark or copyright infringement, (D) the
offer, sale or delivery of the Secured Certificates (the indemnity in this
clause (D) to extend also to any person who controls an Indemnitee within the
meaning of Section 15 of the Securities Act of 1933, as amended) or (E) the
offer or sale of any interest in the Trust Estate or the Trust Agreement or any
similar interest with respect to the Aircraft on or prior to the Delivery Date;
provided that the foregoing indemnity as to any Indemnitee shall not extend to
any Expense resulting from or arising out of or which would not have occurred
but for one or more of the following: (A) any representation or warranty by such
Indemnitee (or any member of the Related Indemnitee Group) in the Operative
Documents, the Intercreditor Agreement, the Liquidity Facilities or the Pass
Through Trust Agreements or in connection therewith being incorrect in any
material respect, or (B) the failure by such Indemnitee (or any member of the
Related Indemnitee Group) to perform or observe any agreement, covenant or
condition in any of the Operative Documents, the Intercreditor Agreement, the
Liquidity Facilities or the Pass Through Trust Agreements applicable to it
including, without limitation, the creation or existence of a Lessor Lien
(including for this purpose Liens which would be Lessor Liens but for the
proviso in the definition of Lessor Liens), a Loan Participant Lien or an
Indenture Trustee's Lien (except to the extent such failure was caused directly
by the failure of Lessee to perform any obligation under a Lessee Document), or
(C) the willful misconduct or the gross negligence of such Indemnitee (or any
member of the Related Indemnitee Group) (other than gross negligence imputed to
such


                               EXHIBIT L - PAGE 1
<PAGE>

Indemnitee (or any member of the Related Indemnitee Group) solely by reason of
its interest in the Aircraft), or (D) with respect to the Owner Trustee, a
disposition (voluntary or involuntary) by the Owner Trustee of all or any part
of its interest in the Airframe or any Engine (other than as contemplated by the
Lease or the Trust Indenture) or with respect to any Indemnitee, by such
Indemnitee of all or any part of such Indemnitee's interest in the Airframe, any
Engine or in the Operative Documents other than during the continuance of an
Event of Default under the Lease, or (E) any Tax whether or not Lessee is
required to indemnify for such Tax pursuant to Section 7(b) hereof (it being
understood that Section 7(b) hereof and the Tax Indemnity Agreement provide for
Lessee's liability with respect to Taxes), or (F) in the case of an Indemnitee
which is the Owner Participant or the Owner Trustee (in its individual or trust
capacity) (other than in connection with an Event of Default) or, in connection
with an exercise of remedies under the Trust Indenture upon a default thereunder
(other than a default under Section 4.02(a) of the Trust Indenture), the
Indenture Trustee or a Loan Participant, the offer or sale of any interest in
the Trust Estate or the Trust Agreement or any similar interest, or (G) in the
case of an Indemnitee which is the Owner Participant or the Owner Trustee (in
its individual or trust capacity) and the affiliates, successors and assigns
thereof, a failure on the part of the Owner Trustee to use ordinary care to
distribute in accordance with the Trust Agreement any amounts received and
distributable by it thereunder, and in the case of an Indemnitee which is a Loan
Participant, a Certificate Holder or the Indenture Trustee (in its individual or
trust capacity) and the affiliates, successors and assigns thereof, a failure on
the part of the Indenture Trustee to use ordinary care to distribute in
accordance with the Trust Indenture any amounts received and distributable by it
thereunder, or (H) the authorization or giving or withholding of any future
amendments, supplements, waivers or consents with respect to any of the
Operative Documents other than such as have been consented to, approved,
authorized or requested by Lessee, or (I) subject to the next succeeding
paragraph, any loss of tax benefits or increase in tax liability under any tax
law whether or not Lessee is required to indemnify therefor pursuant to this
Agreement or the Tax Indemnity Agreement, or (J) except to the extent fairly
attributable to acts, omissions or events occurring prior thereto, acts or
events which occur with respect to the Airframe, any Engine or any Part after
the earliest of: (I) the return of possession of the Airframe or such Engine or
Part to the Owner Trustee or its designee pursuant to the terms of the Lease,
(II) the termination of the Lease in accordance with Section 9 or Section 19
thereof or (III) the commencement of storage pursuant to Section 5(d) of the
Lease, or (K) any Expense which is specified to be for the account of an
Indemnitee pursuant to any Operative Document without express right of
reimbursement under any Operative Document, or (L) as to any Indemnitee the
funding of such Indemnitee's participation in the transaction contemplated by
the Operative Documents giving rise to a "prohibited transaction" within the
meaning of the provisions of the Code or the Regulations of the United States
Department of Labor implementing ERISA or any other violation of the fiduciary
responsibility provisions of ERISA. The foregoing indemnity shall not extend to
any Expense to the extent that such Expense is not caused by, or does not arise
out of, an act, omission or event which occurs prior to the termination of the
Lease and the payment of all other payments required to be paid by Lessee under
the Operative Documents.

            Lessee further agrees that any payment or indemnity pursuant to this
Section 7(c) in respect of any Expenses shall be in an amount which, after
deduction of all Taxes required to be paid by such recipient with respect to
such payment or indemnity under the laws of any Federal, state or local
government or taxing authority in the United States, or under the laws of any
taxing authority or governmental subdivision of a foreign country, or any
territory or


                               EXHIBIT L - PAGE 2
<PAGE>

possession of the United States or any international authority, shall be equal
to the excess, if any, of (A) the amount of such Expense over (B) the net
reduction in Taxes required to be paid by such recipient resulting from the
accrual or payment of such Expense.

            If, by reason of any Expense payment made to or for the account of
an Indemnitee by Lessee pursuant to this Section 7(c), such Indemnitee
subsequently realizes a tax deduction or credit (including foreign tax credit
and any reduction in Taxes) not previously taken into account in computing such
payment, such Indemnitee shall promptly pay to Lessee, but only if Lessee shall
have made all payments then due and owing to such Indemnitee under the Operative
Documents, an amount equal to the sum of (I) the actual reduction in Taxes
realized by such Indemnitee which is attributable to such deduction or credit,
and (II) the actual reduction in Taxes realized by such Indemnitee as a result
of any payment made by such Indemnitee pursuant to this sentence.

            Nothing in this Section 7(c) shall be construed as a guaranty by
Lessee of payments due pursuant to the Secured Certificates or of the residual
value of the Aircraft.

            If a claim is made against an Indemnitee involving one or more
Expenses and such Indemnitee has notice thereof, such Indemnitee shall promptly,
upon receiving such notice, give notice of such claim to Lessee; provided that
the failure to provide such notice shall not release Lessee from any of its
obligations to indemnify hereunder, and no payment by Lessee to an Indemnitee
pursuant to this Section 7(c) shall be deemed to constitute a waiver or release
of any right or remedy which the Lessee may have against such Indemnitee for any
actual damages as a result of the failure by such Indemnitee to give Lessee such
notice. Lessee shall be entitled, at its sole cost and expense, acting through
counsel acceptable to the respective Indemnitee, (A) so long as Lessee has
agreed in a writing acceptable to such Indemnitee that Lessee is liable to such
Indemnitee for such Expense hereunder (unless such Expense is covered by the
proviso to the first paragraph of this Section 7(c)), in any judicial or
administrative proceeding that involves solely a claim for one or more Expenses,
to assume responsibility for and control thereof, (B) so long as Lessee has
agreed in a writing acceptable to such Indemnitee that Lessee is liable to such
Indemnitee for such Expense hereunder (unless such Expense is covered by the
proviso to the first paragraph of this Section 7(c)), in any judicial or
administrative proceeding involving a claim for one or more Expenses and other
claims related or unrelated to the transactions contemplated by the Operative
Documents, to assume responsibility for and control of such claim for Expenses
to the extent that the same may be and is severed from such other claims (and
such Indemnitee shall use its best efforts to obtain such severance), and (C) in
any other case, to be consulted by such Indemnitee with respect to judicial
proceedings subject to the control of such Indemnitee. Notwithstanding any of
the foregoing to the contrary, Lessee shall not be entitled to assume
responsibility for and control of any such judicial or administrative
proceedings (M) while an Event of Default shall have occurred and be continuing,
(N) if such proceedings will involve a material risk of the sale, forfeiture or
loss of, or the creation of any Lien (other than a Permitted Lien) on the
Aircraft, the Trust Indenture Estate or the Trust Estate or any part thereof, or
(O) if such proceeding could in the good faith opinion of such Indemnitee entail
any material risk of criminal liability or present a conflict of interest making
separate representation necessary. The affected Indemnitee may participate at
its own expense and with its own counsel in any judicial proceeding controlled
by Lessee pursuant to the preceding provisions.


                               EXHIBIT L - PAGE 3
<PAGE>

            The affected Indemnitee shall supply Lessee with such information
reasonably requested by Lessee as is necessary or advisable for Lessee to
control or participate in any proceeding to the extent permitted by this Section
7(c). Such Indemnitee shall not enter into a settlement or other compromise with
respect to any Expense without the prior written consent of Lessee, which
consent shall not be unreasonably withheld or delayed, unless such Indemnitee
waives its right to be indemnified with respect to such Expense under this
Section 7(c).

            Lessee shall supply the affected Indemnitee with such information
reasonably requested by such Indemnitee as is necessary or advisable for such
Indemnitee to control or participate in any proceeding to the extent permitted
by this Section 7(c).

            When Lessee or the insurers under a policy of insurance maintained
by Lessee (or any Sublessee) undertakes the defense of an Indemnitee with
respect to an Expense, no additional legal fees or expenses of such Indemnitee
in connection with the defense of such Indemnitee shall be indemnified hereunder
unless such fees or expenses were incurred at the written request of Lessee or
such insurers, provided that no such defense shall be compromised or settled on
a basis that admits any gross negligence or willful misconduct on the part of
such Indemnitee without such Indemnitee's prior consent.

            In the case of any Expense indemnified by Lessee hereunder which is
covered by a policy of insurance maintained by Lessee (or any Sublessee)
pursuant to Section 11 of the Lease or otherwise, it shall be a condition of
such indemnity with respect to any particular Indemnitee that such Indemnitee
shall cooperate with the insurers in the exercise of their rights to
investigate, defend or compromise such Expense as may be required to retain the
benefits of such insurance with respect to such Expense. Notwithstanding any of
the foregoing to the contrary, with respect to any Expense which is covered
under policies of insurance maintained by Lessee (or any Sublessee) pursuant to
Section 11 of the Lease or otherwise, the rights of an Indemnitee to control or
participate in any proceeding shall be modified to the extent necessary to
comply with the requirements of such policies and the rights of the insurers
thereunder.

            Upon payment of any Expense or Tax pursuant to this Section 7,
Lessee or, if any Expense or Tax has been paid by insurers, the insurers,
without any further action, shall be subrogated to any claims the affected
Indemnitee may have relating thereto other than claims under Section 5.03 or
7.01 of the Trust Indenture or Section 5.03 or 7.01 of the Trust Agreement. Such
Indemnitee agrees to give such further assurances or agreements and to cooperate
with Lessee or the insurers to permit Lessee or the insurers to pursue such
claims, if any, to the extent reasonably requested by Lessee or the insurers.

            In the event that Lessee shall have paid an amount to an Indemnitee
pursuant to this Section 7(c), and such Indemnitee subsequently shall be
reimbursed in respect of such indemnified amount from any other Person, such
Indemnitee shall promptly pay to Lessee an amount equal to the amount of such
reimbursement (but in no event more than such payment from Lessee) plus any net
tax benefit (or minus any net tax detriment) realized by such Indemnitee as a
result of any reimbursement received and payment made by such Indemnitee
pursuant to this sentence, provided that (i) no Event of Default has occurred
and is continuing and (ii) such Indemnitee shall have no obligation to reimburse
Lessee if Lessee has not paid such


                               EXHIBIT L - PAGE 4
<PAGE>

Indemnitee all amounts required pursuant to this Section 7(c) and any other
amounts then due to such Indemnitee from Lessee under any of the Operative
Documents.

            Lessee's obligations under the indemnities provided for in this
Agreement shall be those of a primary obligor, whether or not the Person
indemnified shall also be indemnified with respect to the same matter under the
terms of any other document or instrument, and the Person seeking
indemnification from Lessee pursuant to any provision of this Agreement may
proceed directly against Lessee without first seeking to enforce any other right
of indemnification.

            Lessee agrees to pay the reasonable fees and expenses of the
Indenture Trustee and the Owner Trustee for acting as such, other than such fees
and expenses which constitute Transaction Expenses.


                               EXHIBIT L - PAGE 5



================================================================================

                                 LEASE AGREEMENT
                                   [NW ____ _]

                                   Dated as of

                               [-----------------]

                                     Between

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
               Not in its Individual Capacity, except as expressly
                  provided herein, but solely as Owner Trustee,
                                              Lessor

                                       AND

                            NORTHWEST AIRLINES, INC.,
                                              Lessee

                    One Airbus [A320-212] [A319-113] Aircraft

================================================================================

As set forth in Section 20 hereof, Lessor has assigned to the Indenture Trustee
(as defined herein) certain of its right, title and interest in and to this
Lease. To the extent, if any, that this Lease constitutes chattel paper (as such
term is defined in the Uniform Commercial Code as in effect in any applicable
jurisdiction) no security interest in this Lease may be created through the
transfer or possession of any counterpart other than the original executed
counterpart, which shall be identified as the counterpart containing the receipt
therefor executed by the Indenture Trustee on the signature page thereof.
<PAGE>

                                TABLE OF CONTENTS

                                                                          Page
                                                                          ----

SECTION 1.    Definitions....................................................1

SECTION 2.    Acceptance and Lease..........................................16

SECTION 3.    Term and Rent.................................................16
              (a) Basic Term................................................16
              (b) [Intentionally Omitted]...................................16
              (c) Basic Rent................................................16
              (d) Adjustments to Basic Rent.................................16
              (e) Supplemental Rent.........................................18
              (f) Payments in General.......................................18

SECTION 4.    Lessor's Representations and Warranties.......................19

SECTION 5.    Return of the Aircraft........................................20
              (a) Condition Upon Return.....................................20
              (b) Return of the Engines.....................................21
              (c) Fuel; Manuals.............................................21
              (d) Storage Upon Return.......................................21

SECTION 6.    Liens.........................................................22

SECTION 7.    Registration, Maintenance and Operation; Possession and
                 Subleases; Insignia........................................22
              (a) Registration and Maintenance..............................22
              (b) Possession and Subleases..................................24
              (c) Insignia..................................................27

SECTION 8.    Replacement and Pooling of Parts; Alterations,
                 Modifications and Additions................................28
              (a) Replacement of Parts......................................28
              (b) Pooling of Parts..........................................29
              (c) Alterations, Modifications and Additions..................29

SECTION 9.    Voluntary Termination.........................................30
              (a) Termination Event.........................................30
              (b) [Intentionally Omitted]...................................30
              (c) Optional Sale of the Aircraft.............................30
              (d) Termination as to Engines.................................32

SECTION 10.   Loss, Destruction, Requisition, etc...........................32
              (a) Event of Loss with Respect to the Aircraft................32
              (b) Event of Loss with Respect to an Engine...................34


                                       -i-
<PAGE>

                                                                          Page
                                                                          ----

              (c) Application of Payments from Governmental Authorities
                     for Requisition of Title, etc..........................35
              (d) Requisition for Use of the Aircraft by the United
                     States Government or the Government of Registry of
                     the Aircraft...........................................36
              (e) Requisition for Use of an Engine by the United States
                     Government or the Government of Registry of the
                     Aircraft...............................................37
              (f) Application of Payments During Existence of Event of
                     Default................................................37

SECTION 11.   Insurance.....................................................37
              (a) Public Liability and Property Damage Insurance............37
              (b) Insurance Against Loss or Damage to the Aircraft..........39
              (c) Reports, etc..............................................41
              (d) Self-Insurance............................................42
              (e) Additional Insurance by Lessor and Lessee.................42
              (f) Indemnification by Government in Lieu of Insurance........43
              (g) Application of Payments During Existence of an Event
                     of Default.............................................43

SECTION 12.   Inspection....................................................43

SECTION 13.   Assignment....................................................44

SECTION 14.   Events of Default.............................................44

SECTION 15.   Remedies......................................................46

SECTION 16.   Lessee's Cooperation Concerning Certain Matters...............49

SECTION 17.   Notices.......................................................50

SECTION 18.   No Set-Off, Counterclaim, etc.................................50

SECTION 19.   Renewal Options; Purchase Options; Valuation..................51
              (a) Renewal Options...........................................51
              (b) Purchase Options..........................................52
              (c) Valuation.................................................52
              (d) Special Purchase Option...................................53

SECTION 20.   Security for Lessor's Obligation to Holders of Secured
                 Certificates...............................................54

SECTION 21.   Lessor's Right to Perform for Lessee..........................55

SECTION 22.   Investment of Security Funds; Liability of Lessor Limited.....55
              (a) Investment of Security Funds..............................55
              (b) Liability of Lessor Limited...............................56


                                      -ii-
<PAGE>

                                                                          Page
                                                                          ----

SECTION 23.   Service of Process............................................56

SECTION 24.   Miscellaneous.................................................56

SECTION 25.   Successor Trustee.............................................56

SECTION 26.   Covenant of Quiet Enjoyment...................................57


                                     -iii-
<PAGE>

                                    EXHIBITS

EXHIBIT A - Form of Lease Supplement
EXHIBIT B - Basic Rent, Lessor's Cost and Special Purchase Price Schedule
EXHIBIT C - Stipulated Loss Value Schedule
EXHIBIT D - Termination Value Schedule
EXHIBIT E - Rent Recalculation Verification
EXHIBIT F - Schedule of Domiciles of Permitted Sublessees
EXHIBIT G - Return Conditions


                                      -iv-
<PAGE>

                                 LEASE AGREEMENT

                                   [NW ____ _]

            This LEASE AGREEMENT [NW ____ _], dated as of [___________], between
FIRST SECURITY BANK, NATIONAL ASSOCIATION, not in its individual capacity,
except as expressly provided herein, but solely as Owner Trustee under the Trust
Agreement (as defined in Section 1 hereof) (in such capacity, "Lessor"), and
NORTHWEST AIRLINES, INC., a corporation organized and existing pursuant to the
laws of the State of Minnesota ("Lessee");

                              W I T N E S S E T H:

            SECTION 1. Definitions. Unless the context otherwise requires, the
following terms shall have the following meanings for all purposes of this Lease
Agreement [NW 1999 _] and shall be equally applicable to both the singular and
the plural forms of the terms herein defined:

                  "Affiliate" means, with respect to any person, any other
            person directly or indirectly controlling, controlled by or under
            common control with such person. For the purposes of this
            definition, "control" (including "controlled by" and "under common
            control with") shall mean the power, directly or indirectly, to
            direct or cause the direction of the management and policies of such
            person whether through the ownership of voting securities or by
            contract or otherwise.

                  "Aircraft" means the Airframe to be delivered and leased
            hereunder (or any airframe from time to time substituted for such
            Airframe pursuant to Section 10(a) hereof) together with the two
            Engines initially leased hereunder (or any engine substituted for
            either of such Engines pursuant to the terms hereof), whether or not
            any of such initial or substituted Engines may from time to time be
            installed on such initial or substituted Airframe or may be
            installed on any other airframe or on any other aircraft.

                  "Airframe" means: (i) the Airbus [A320-212] [A319-113]
            aircraft (except Engines or engines from time to time installed
            thereon) specified in the initial Lease Supplement, which aircraft
            shall be leased by Lessor to Lessee hereunder and under such Lease
            Supplement, and any aircraft (except Engines or engines from time to
            time installed thereon) which may from time to time be substituted
            for such aircraft (except Engines or engines from time to time
            installed thereon) pursuant to clause (ii) of the first paragraph of
            Section 10(a); and (ii) any and all Parts (A) so long as the same
            shall be incorporated or installed in or attached to such aircraft
            (except Engines or engines from time to time installed thereon), or
            (B) so long as title thereto shall remain vested in Lessor in
            accordance with the terms of Section 8 after removal from such
            aircraft (except Engines or engines from time to time installed
            thereon); provided, however, that at such time as an aircraft
            (except Engines or engines from time to time installed thereon)
            shall be deemed part of the property leased hereunder in
            substitution for the Airframe
<PAGE>

            pursuant to the applicable provisions hereof, the replaced Airframe
            shall cease to be an Airframe hereunder.

                  "Applicable Rate" means as of any date the weighted average of
            the interest rates borne by the Secured Certificates then
            outstanding and, if no Secured Certificates shall be outstanding,
            the Base Rate.

                  "Bankruptcy Code" means the Bankruptcy Reform Act of 1978, as
            amended, or any subsequent legislation that amends, supplements or
            supersedes such provisions.

                  "Base Rate" means the rate of interest announced publicly by
            Citibank, N.A. in New York, New York from time to time as its base
            rate.

                  "Basic Rent" means, for the Basic Term, the rent payable for
            the Aircraft pursuant to Section 3(c) as adjusted as provided in
            Section 3(d) but subject always to the provisions of Section 3(d)(v)
            hereof and, for any Renewal Term, Basic Rent determined pursuant to
            Section 19.

                  "Basic Term" means the term for which the Aircraft is leased
            hereunder pursuant to Section 3(a) hereof commencing on the Delivery
            Date and ending on [______________________], or such earlier date as
            this Lease may be terminated in accordance with the provisions
            hereof.

                  "Beneficial Interest" means the interest of the Owner
            Participant under the Trust Agreement.

                  "Bill of Sale" means a full warranty bill of sale covering the
            Aircraft, executed by Lessee in favor of the Owner Trustee, dated
            the Delivery Date, specifically referring to the Airframe and each
            Engine, which Bill of Sale shall contain, among other things, a
            statement that such Bill of Sale thereby conveys to the Owner
            Trustee good title to the Airframe and each Engine described in such
            Bill of Sale, free and clear of all liens, encumbrances and rights
            of others except Liens permitted by clause (v) of Section 6 of the
            Lease.

                  "Business Day" means any day other than a Saturday or Sunday
            or a day on which commercial banks are required or authorized to
            close in the City of New York, New York; Boston, Massachusetts; or
            Minneapolis, Minnesota.

                  "Certificate Holder" means Certificate Holder as defined in
            the Trust Indenture.

                  "Certificated Air Carrier" means a Citizen of the United
            States holding a carrier operating certificate issued by the
            Secretary of Transportation pursuant to Chapter 447 of Title 49,
            United States Code, for aircraft capable of carrying ten or more
            individuals or 6,000 pounds or more of cargo or that otherwise is
            certified or registered to the extent required to fall within the
            purview of 11 U.S.C. Section 1110 or any analogous successor
            provision of the Bankruptcy Code.


                                      -2-
<PAGE>

                  "Citizen of the United States" has the meaning specified in
            Section 40102(a)(15) of Title 49 of the United States Code or any
            similar legislation of the United States of America enacted in
            substitution or replacement therefor.

                  "Civil Reserve Air Fleet Program" means the Civil Reserve Air
            Fleet Program currently administered by the United States Air Force
            Air Mobility Command pursuant to Executive Order No. 11490, as
            amended, or any substantially similar program.

                  "Code" means the Internal Revenue Code of 1986, as amended.

                  "Commitment" means the amount of a Pass Through Trustee's or
            the Owner Participant's, as the case may be, participation in
            Lessor's Cost for the Aircraft required to be made available or paid
            as provided in Section 1 of the Participation Agreement.

                  "Consent and Agreement" means, collectively, the Manufacturer
            Consent and Agreement to Assignment of Warranties and the Supplier
            Consent and Agreement to Assignment of Warranties.

                  "Default" means any event which with the giving of notice or
            the lapse of time or both would become an Event of Default.

                  "Delivery Date" means the date of the initial Lease Supplement
            for the Aircraft, which date shall be the date the Aircraft is
            leased by Lessor to Lessee and accepted by Lessee hereunder.

                  "Depreciation Period" means the period commencing on the
            Delivery Date and ending on [________________], or such earlier date
            as this Lease may be terminated in accordance with the provisions
            hereof.

                  "Dollars" and "$" means the lawful currency of the United
            States of America.

                  "EBO Date" means [____________] (or, if [____________] is not
            a Business Day, the Business Day immediately succeeding
            [------------]).

                  "Engine" means (i) each of the two CFM International, Inc.
            Model CFM56-5A[3][4] engines listed by manufacturer's serial number
            in the initial Lease Supplement, whether or not from time to time
            thereafter installed on the Airframe or installed on any other
            airframe or on any other aircraft; and (ii) any engine which may
            from time to time be substituted, pursuant to the terms hereof, for
            any of such two engines, together in each case with any and all
            Parts incorporated or installed in or attached thereto or any and
            all Parts removed therefrom so long as title thereto shall remain
            vested in Lessor in accordance with the terms of Section 8 after
            removal from such Engine; provided, however, that at such time as an
            engine shall be deemed part of the property leased hereunder in
            substitution for an Engine pursuant to the applicable provisions
            hereof, the


                                      -3-
<PAGE>

            replaced Engine shall cease to be an Engine hereunder. The term
            "Engines" means, as of any date of determination, all Engines then
            leased hereunder.

                  "ERISA" means the Employee Retirement Income Security Act of
            1974, as amended from time to time, and the regulations promulgated
            and rulings issued thereunder. Section references to ERISA are to
            ERISA, as in effect at the date of the Participation Agreement and
            any subsequent provisions of ERISA, amendatory thereof, supplemental
            thereto or substituted therefor.

                  "Event of Default" has the meaning specified in Section 14
            hereof.

                  "Event of Loss" with respect to the Aircraft, Airframe or any
            Engine means any of the following events with respect to such
            property: (i) the loss of such property or of the use thereof due to
            the destruction of or damage to such property which renders repair
            uneconomic or which renders such property permanently unfit for
            normal use by Lessee (or any Sublessee) for any reason whatsoever;
            (ii) any damage to such property which results in an insurance
            settlement with respect to such property on the basis of a total
            loss, or a constructive or compromised total loss; (iii) the theft
            or disappearance of such property, or the confiscation,
            condemnation, or seizure of, or requisition of title to, or use of,
            such property (other than a requisition for use by the United States
            Government or any other government of registry of the Aircraft, or
            any agency or instrumentality of any thereof) which in the case of
            any event referred to in this clause (iii) (other than a requisition
            of title) shall have resulted in the loss of possession of such
            property by Lessee (or any Sublessee) for a period in excess of 180
            consecutive days or, if earlier, until the end of the Term or, in
            the case of a requisition of title, the requisition of title shall
            not have been reversed within 90 days from the date of such
            requisition of title or, if earlier, at the end of the Term; (iv) as
            a result of any law, rule, regulation, order or other action by the
            Federal Aviation Administration or other governmental body of the
            government of registry of the Aircraft having jurisdiction, the use
            of such property in the normal course of the business of air
            transportation shall have been prohibited for a period of 180
            consecutive days, unless Lessee (or any Sublessee), prior to the
            expiration of such 180 day period, shall have undertaken and shall
            be diligently carrying forward all steps which are necessary or
            desirable to permit the normal use of such property by Lessee (or
            such Sublessee), but in any event if such use shall have been
            prohibited for a period of two consecutive years, provided that no
            Event of Loss shall be deemed to have occurred if such prohibition
            has been applicable to the entire U.S. registered fleet of Airbus
            Model [A320-200] [A319-100] aircraft of Lessee (or any Sublessee)
            and Lessee (or a Sublessee), prior to the expiration of such
            two-year period, shall have conformed at least one such aircraft in
            its fleet to the requirements of any such law, rule, regulation,
            order or other action and commenced regular commercial use of the
            same in such jurisdiction and shall be diligently carrying forward,
            in a manner which does not discriminate against the Aircraft in so
            conforming the Aircraft, all steps which are necessary or desirable
            to permit the normal use of the Aircraft by Lessee (or such
            Sublessee), provided, further that, notwithstanding any of the
            foregoing, such


                                      -4-
<PAGE>

            prohibition shall constitute an Event of Loss if such use shall have
            been prohibited for a period of three consecutive years or such use
            shall be prohibited at the expiration of the Term; (v) the
            requisition for use by the United States Government or any other
            government of registry of the Aircraft or any instrumentality or
            agency of any thereof, which shall have occurred during the Basic
            Term (or any Renewal Term) and shall have continued for thirty (30)
            days beyond the Term, provided, however, that no Event of Loss
            pursuant to this clause (v) shall exist if Lessor shall have
            furnished to Lessee the written notice specified in Section 10(d)
            hereof; and (vi) any divestiture of title to or interest in an
            Engine treated as an Event of Loss pursuant to Section 7(b) hereof.
            An Event of Loss with respect to the Aircraft shall be deemed to
            have occurred if an Event of Loss occurs with respect to the
            Airframe.

                  "Expenses" has the meaning specified in Section 7(c) of the
            Participation Agreement.

                  "FAA Bill of Sale" means a bill of sale for the Aircraft on AC
            Form 8050-2 or such other form as may be approved by the Federal
            Aviation Administration on the Delivery Date for the Aircraft,
            executed by Lessee in favor of the Owner Trustee and dated the
            Delivery Date.

                  "Federal Aviation Act" means that portion of the United States
            Code comprising those provisions formerly referred to as the Federal
            Aviation Act of 1958, as amended, or any subsequent legislation that
            amends, supplements or supersedes such provisions.

                  "Federal Aviation Administration" and "FAA" mean the United
            States Federal Aviation Administration and any agency or
            instrumentality of the United States government succeeding to their
            functions.

                  "Foreign Air Carrier" means any air carrier which is not a
            U.S. Air Carrier and which performs maintenance, preventative
            maintenance and inspections for the Aircraft, Airframe and/or any
            Engine or engine to standards which are approved by, or which are
            substantially equivalent to those required by, the Federal Aviation
            Administration, the Civil Aviation Authority of the United Kingdom,
            the Direction Generale de l'Aviation Civile of the French Republic,
            the Luftfahrt Bundesamt of the Federal Republic of Germany, the
            Rijksluchtvaartdienst of the Kingdom of the Netherlands, the
            Ministry of Transportation of Japan or the Federal Ministry of
            Transport of Canada (and any agency or instrumentality of the
            applicable government succeeding to the functions of any of the
            foregoing entities).

                  "French Pledge Agreement" means the French Pledge Agreement,
            dated as of the date hereof, between the Owner Trustee and the
            Indenture Trustee.


                                      -5-
<PAGE>

                  "Guarantee" means that certain Guarantee [NW ____ _], dated as
            of the date hereof, made by the Guarantor, as such Guarantee may be
            amended or supplemented from time to time pursuant to the applicable
            provisions thereof.

                  "Guarantor" means Northwest Airlines Corporation, a Delaware
            corporation.

                  "Guaranty" means that certain Guaranty of the Manufacturer
            attached to the Purchase Agreement.

                  "Indemnitee" means (i) the Owner Trustee, in its individual
            capacity and as trustee under the Trust Agreement, (ii) the
            Indenture Trustee, (iii) the Owner Participant, (iv) the Trust
            Estate, (v) the Loan Participants and each other Certificate Holder,
            (vi) the Subordination Agent, (vii) the Liquidity Provider, (viii)
            the Pass Through Trustees, (ix) each Affiliate of the Persons
            described in clauses (i) through (iv), inclusive, (x) each Affiliate
            of the Persons described in clauses (vi), (vii) and (viii)
            inclusive, (xi) the respective directors, officers, employees,
            agents and servants of each of the Persons described in clauses (i)
            through (viii), inclusive, (xii) the successors and permitted
            assigns of the Persons described in clauses (i) through (iv),
            inclusive, and (xiii) the successors and permitted assigns of the
            Persons described in clauses (v), (vi), (vii) and (viii) inclusive.

                  "Indenture Trustee" means the Indenture Trustee under the
            Trust Indenture, and any entity which may from time to time be
            acting as indenture trustee under the Trust Indenture.

                  "Indenture Trustee Documents" means the Participation
            Agreement and the Trust Indenture.

                  "Indenture Trustee's Liens" means any Lien which arises as a
            result of (A) claims against the Indenture Trustee not related to
            its interest in the Aircraft or the administration of the Trust
            Estate pursuant to the Trust Indenture, (B) acts of the Indenture
            Trustee not permitted by, or failure of the Indenture Trustee to
            take any action required by, the Operative Documents to the extent
            such acts arise or such failure arises from or constitutes gross
            negligence or willful misconduct, (C) claims against the Indenture
            Trustee relating to Taxes or Expenses which are excluded from the
            indemnification provided by Section 7 of the Participation Agreement
            pursuant to said Section 7, or (D) claims against the Indenture
            Trustee arising out of the transfer by the Indenture Trustee of all
            or any portion of its interest in the Aircraft, the Trust Estate,
            the Trust Indenture Estate or the Operative Documents other than a
            transfer of the Aircraft pursuant to Section 9, 10 or 19 of the
            Lease or Article IV or V of the Trust Indenture, or a transfer of
            the Aircraft pursuant to Section 15 of the Lease while an Event of
            Default is continuing and prior to the time that the Indenture
            Trustee has received all amounts due pursuant to the Trust
            Indenture.


                                      -6-
<PAGE>

                  ["Initial Installment" has the meaning set forth in Section
            19(d) hereof.]

                  "Intercreditor Agreement" means that certain Intercreditor
            Agreement among the Pass Through Trustees, the Liquidity Provider
            and the Subordination Agent, as such Intercreditor Agreement may be
            amended or supplemented from time to time pursuant to the applicable
            provisions thereof.

                  "Issuance Date" means June 25, 1999.

                  "Lease Agreement", "this Lease Agreement", "this Lease", "this
            Agreement", "herein", "hereof", "hereunder", "hereby" or other like
            words mean this Lease Agreement [NW ____ _] as originally executed
            or as modified, amended or supplemented pursuant to the applicable
            provisions hereof and in accordance with the Trust Agreement and the
            Trust Indenture, including, without limitation, supplementation
            hereof by one or more Lease Supplements entered into pursuant to the
            applicable provisions hereof.

                  "Lease Period" means each of the consecutive periods
            throughout the Basic Term and any Renewal Term ending on a Lease
            Period Date, the first such period commencing on and including the
            Delivery Date.

                  "Lease Period Date" means [_______________] and each
            succeeding [_________________] and [____________], to and including
            the last such date in the Term.

                  "Lease Supplement" means a Lease Supplement, substantially in
            the form of Exhibit A hereto, to be entered into between Lessor and
            Lessee on the Delivery Date for the purpose of leasing the Aircraft
            under and pursuant to the terms of this Lease Agreement, and any
            subsequent Lease Supplement entered into in accordance with the
            terms hereof.

                  "Lessee Documents" means the Participation Agreement, the
            Lease, the Lease Supplement covering the Aircraft, the Purchase
            Agreement (insofar as it relates to the Aircraft), the FAA Bill of
            Sale, the Bill of Sale, the Purchase Agreement Assignment and the
            Tax Indemnity Agreement.

                  "Lessor Liens" means any Lien or disposition of title or
            interest arising as a result of (i) claims against Lessor, First
            Security Bank, National Association, in its individual capacity, or
            the Owner Participant not related to the transactions contemplated
            by the Operative Documents, (ii) any act or omission of the Owner
            Participant, Lessor, or First Security Bank, National Association,
            in its individual capacity, which is not related to the transactions
            contemplated by the Operative Documents or is in violation of any of
            the terms of the Operative Documents, (iii) claims against the Owner
            Participant, Lessor, or First Security Bank, National Association,
            in its individual capacity, with respect to Taxes or Expenses
            against which Lessee is not required to indemnify the Owner
            Participant, Lessor or First Security Bank, National Association, in
            its individual capacity, pursuant to Section 7 of the Participation
            Agreement or (iv) claims against Lessor or the


                                      -7-
<PAGE>

            Owner Participant arising out of any transfer by Lessor or the Owner
            Participant of all or any portion of the respective interests of
            Lessor or the Owner Participant in the Aircraft, the Trust Estate or
            the Operative Documents other than the transfer of possession of the
            Aircraft by Lessor pursuant to this Agreement, the transfer pursuant
            to the Trust Indenture or a transfer of the Aircraft pursuant to
            Section 9, 10 or 19 hereof or pursuant to the exercise of the
            remedies set forth in Section 15 hereof, provided, however, that any
            Lien which is attributable solely to First Security Bank, National
            Association or the Owner Participant and would otherwise constitute
            a Lessor Lien hereunder shall not constitute a Lessor Lien hereunder
            so long as (1) the existence of such Lien poses no material risk of
            the sale, forfeiture or loss of the Aircraft, (2) the existence of
            such Lien does not interfere in any way with the use, possession,
            operation, or quiet enjoyment of the Aircraft by Lessee (or any
            Sublessee), (3) the existence of such Lien does not affect the
            priority or perfection of, or otherwise jeopardize, the Lien of the
            Trust Indenture, (4) First Security Bank, National Association or
            the Owner Participant, as appropriate, is diligently contesting such
            Lien and (5) the existence of such Lien does not pose a material
            threat of interference with the payment of Rent (other than Excluded
            Payments in favor of First Security Bank, National Association or
            the Owner Participant, as appropriate).

                  "Lessor's Cost" for the Aircraft means the amount denominated
            as such in Exhibit B to the Lease.

                  "Lien" means any mortgage, pledge, lien, charge, claim,
            encumbrance, lease, sublease, sub-sublease or security interest.

                  "Liquidity Facilities" means the three Revolving Credit
            Agreements between the Subordination Agent, as borrower, and the
            Liquidity Provider, and any replacement thereof, in each case as the
            same may be amended, modified or supplemented.

                  "Liquidity Provider" means Citibank, N.A., as Class A
            Liquidity Provider, Class B Liquidity Provider and Class C Liquidity
            Provider under the Liquidity Facilities, or any successor thereto.

                  "Loan Participant" means each Purchaser and its respective
            successors and registered assigns, including any Certificate Holder.

                  "Loan Participant Liens" means any Lien which arises from acts
            or claims against any Loan Participant not related to the
            transactions contemplated by the Operative Documents.

                  "Loss Payment Date" has the meaning specified in Section 10(a)
            hereof.

                  "Majority in Interest of Certificate Holders" has the meaning
            set forth in the Trust Indenture.


                                      -8-
<PAGE>

                  "Make-Whole Amount" has the meaning assigned to that term in
            the Trust Indenture.

                  "Manufacturer" means Airbus Industrie, G.I.E.; a Groupment
            d'Interet Economique established under Ordonnance 67-821, dated
            September 23, 1967, of the Republic of France.

                  "Manufacturer Consent and Agreement to Assignment of
            Warranties" means the Manufacturer Consent and Agreement to
            Assignment of Warranties [NW ____ __], dated as of the date hereof,
            executed by the Manufacturer, as the same may be amended, modified
            or supplemented from time to time in accordance with the applicable
            terms thereof.

                  "Manufacturer Documents" means the Manufacturer Consent and
            Agreement to Assignment of Warranties and the Guaranty.

                  ["Mortgage" means that certain Mortgage and Security
            Agreement, dated as of [_______________].]

                  "Net Economic Return" shall have the meaning ascribed to such
            term in paragraph 2 of Exhibit E to the Lease.

                  "Net Present Value of Rents" means the net present value, as
            of the Delivery Date, of Basic Rent set forth in Exhibit B hereto,
            discounted at an annual interest rate of [___] percent on a
            semi-annual basis.

                  "Note Purchase Agreement" means that certain Note Purchase
            Agreement, dated as of the Issuance Date, among Northwest Airlines,
            Inc., the Subordination Agent, First Security Bank, National
            Association, as Escrow Agent, State Street Bank and Trust Company,
            as Paying Agent and State Street Bank and Trust Company of
            Connecticut, National Association, as the Pass Through Trustee under
            each Pass Through Trust Agreement providing for, among other things,
            the issuance and sale of certain secured certificates.

                  "Operative Documents" and "Operative Document" means each of
            the Participation Agreement, the Lease, the Trust Indenture, the
            Trust Agreement, an acceptance certificate covering the Aircraft in
            the form agreed to by the Participants and Lessee, the Tax Indemnity
            Agreement, the Lease Supplement covering the Aircraft, the Trust
            Supplement covering the Aircraft, the Secured Certificates, the Bill
            of Sale, the FAA Bill of Sale, the Purchase Agreement (insofar as it
            relates to the Aircraft), the Guarantee, the Purchase Agreement
            Assignment and the Consent and Agreement.

                  "Overall Transaction" means all the transactions contemplated
            by the Operative Documents.

                  "Owner Participant" means the corporation executing the
            Participation Agreement as the Owner Participant, and thereafter any
            Person to which such


                                      -9-
<PAGE>

            corporation transfers all of its right, title and interest in and to
            the Trust Agreement, the Trust Estate and the Participation
            Agreement, to the extent permitted by Section 8.01 of the Trust
            Agreement and Section 8 of the Participation Agreement.

                  "Owner Participant Documents" means the Participation
            Agreement, the Trust Agreement and the Tax Indemnity Agreement.

                  "Owner Trustee" means the entity executing the Participation
            Agreement as Owner Trustee and any entity appointed as successor
            Owner Trustee pursuant to Section 9.01 of the Trust Agreement, and
            references to a predecessor Owner Trustee in its individual capacity
            by name in the Operative Documents shall include such successor
            Owner Trustee in its individual capacity from and after such
            succession.

                  "Owner Trustee Documents" means the Participation Agreement,
            the Trust Agreement, the Trust Supplement covering the Aircraft, the
            Lease, the Lease Supplement covering the Aircraft, the Purchase
            Agreement Assignment, the Trust Indenture and the Secured
            Certificates.

                  "Participants" means and includes the Loan Participants and
            the Owner Participant.

                  "Participation Agreement" means that certain Participation
            Agreement [NW ____ _], dated as of the date hereof, among Lessee,
            the Guarantor, the Purchasers, the Indenture Trustee, the
            Subordination Agent, the Owner Participant and Owner Trustee, as
            such Participation Agreement may be amended or supplemented from
            time to time pursuant to the applicable provisions thereof.

                  "Parties" means the Owner Trustee, the Indenture Trustee and
            the Participants.

                  "Parts" means all appliances, parts, instruments,
            appurtenances, accessories, furnishings and other equipment of
            whatever nature (other than (a) complete Engines or engines, (b) any
            items leased by Lessee from a third party (other than Lessor) and
            (c) cargo containers) which may from time to time be incorporated or
            installed in or attached to the Airframe or any Engine or so long as
            title thereto shall remain vested in Lessor in accordance with
            Section 8 after removal therefrom.

                  "Pass Through Certificates" means the pass through
            certificates to be issued by the Pass Through Trustee in connection
            with the Overall Transaction.

                  "Pass Through Trust" means each of the three separate pass
            through trusts created under the Pass Through Trust Agreements.


                                      -10-
<PAGE>

                  "Pass Through Trust Agreement" means the pass through trust
            agreement and each of the three separate pass through trust
            supplements referred to on Schedule III to the Participation
            Agreement.

                  "Pass Through Trustee" means State Street Bank and Trust
            Company of Connecticut, National Association, a national banking
            association, in its capacity as trustee under each Pass Through
            Trust Agreement, and each other person that may from time to time be
            acting as successor trustee under any such Pass Through Trust
            Agreement.

                  "Past Due Rate" means (i) with respect to the portion of any
            payment of Rent that may be required by the Trust Indenture to be
            paid by the Indenture Trustee to the Loan Participants, or the
            holders of any outstanding Secured Certificates, the "Past Due Rate"
            as defined in the Trust Indenture and (ii) with respect to the
            remaining portion of any payment of Rent (and the entire amount of
            any payment of Rent after the satisfaction and discharge of the
            Trust Indenture), a rate per annum equal to [_]% over the Base Rate.

                  "Permitted Lien" means any Lien referred to in clauses (i)
            through (viii) of Section 6 hereof.

                  "Permitted Sublessee" means any entity domiciled in a country
            listed in Exhibit F hereto.

                  "Person" means any individual, corporation, partnership,
            limited liability company, joint venture, association, joint-stock
            company, trust, unincorporated organization or government or any
            agency or political subdivision thereof.

                  "Purchase Agreement" means that certain [Airbus A320 Purchase
            Agreement] [Airbus A319 Purchase Agreement], dated [as of March 29,
            1996] [as of September 19, 1997], between the Supplier and Lessee
            relating to the purchase by Lessee of the Aircraft, as originally
            executed or as modified, amended or supplemented in accordance with
            the terms thereof, but only insofar as the foregoing relates to the
            Aircraft.

                  "Purchase Agreement Assignment" means that certain Purchase
            Agreement Assignment [NW ____ _], dated as of the date hereof,
            between Lessee and Lessor, as the same may be amended, supplemented
            or modified from time to time, with forms of Consent and Agreement
            to be executed by the Manufacturer and the Supplier attached
            thereto.

                  "Purchasers" means the Pass Through Trustees under each Pass
            Through Trust Agreement.

                  "Related Indemnitee Group" means, with respect to any
            Indemnitee, any officer, director, servant, employee, agent or
            Affiliate thereof.


                                      -11-
<PAGE>

                  ["Remaining Installments" has the meaning set forth in Section
            19(d) hereof.]

                  "Renewal Term" means any Fixed Renewal Term or Fair Market
            Renewal Term as those terms are defined in Section 19 hereof.

                  "Rent" means Basic Rent and Supplemental Rent, collectively.

                  "Secured Certificates" has the meaning assigned to that term
            in the Trust Indenture.

                  "Special Purchase Price" means the amount denominated as such
            in Exhibit B to the Lease.

                  "Stipulated Loss Value" with respect to the Aircraft as of any
            date through and including [_________________], means, but subject
            always to the provisions of Section 3(d)(v) hereof, the amount
            determined by multiplying Lessor's Cost for the Aircraft by the
            percentage specified in Exhibit C hereto opposite the Stipulated
            Loss Value Date with respect to which the amount is determined (as
            such Exhibit C may be adjusted from time to time as provided in
            Section 3(d) hereof and in Section 7 of the Tax Indemnity
            Agreement). "Stipulated Loss Value" as of any date after
            [_____________] shall be the amount determined as provided in
            Section 19(a) hereof.

                  "Stipulated Loss Value Date" means the [___] calendar day of
            each calendar month during the Basic Term and any Renewal Term.

                  "Sublease" means any sublease permitted by the terms of
            Section 7(b)(x) hereof.

                  "Sublessee" means any Person for so long, but only so long, as
            such Person is in possession of the Airframe and/or any Engine
            pursuant to the terms of a Sublease which is then in effect pursuant
            to Section 7(b)(x) hereof.

                  "Subordination Agent" means State Street Bank and Trust
            Company, a Massachusetts trust company, as subordination agent under
            the Intercreditor Agreement, or any successor thereto.

                  "Supplemental Rent" means, without duplication, (a) all
            amounts, liabilities, indemnities and obligations (other than Basic
            Rent) which Lessee assumes or agrees to pay under any Lessee
            Document to or on behalf of Lessor or any other Person, (b) amounts
            payable by Lessor pursuant to clause (b) of the third paragraph of
            Section 2.02 of the Trust Indenture, (c) Lessor's pro rata share of
            all compensation and reimbursement of expenses, disbursements and
            advances payable by Lessee under the Pass Through Trust Agreements,
            and (d) Lessor's pro rata share of all compensation and
            reimbursement of expenses and disbursements payable to the
            Subordination Agent under the Intercreditor Agreement except with
            respect to any income or franchise taxes incurred by the


                                      -12-
<PAGE>

            Subordination Agent in connection with the transactions contemplated
            by the Intercreditor Agreement. As used herein, "Lessor's pro rata
            share" means as of any time a fraction, the numerator of which is
            the principal balance then outstanding of Secured Certificates and
            the denominator of which is the aggregate principal balance then
            outstanding of all "Equipment Notes" (as such term is defined in the
            Intercreditor Agreement).

                  "Supplier" means AVSA, S.A.R.L., a French societe a
            responsabilite limitee, organized and existing under the laws of the
            French Republic, and its successors.

                  "Supplier Consent and Agreement to Assignment of Warranties"
            means the Supplier Consent and Agreement to Assignment of Warranties
            [NW ____ _], dated as of the date hereof, executed by the Supplier,
            as the same may be amended, modified or supplemented from time to
            time in accordance with the applicable terms thereof.

                  "Supplier Documents" means the Purchase Agreement and the
            Supplier Consent and Agreement to Assignment of Warranties.

                  "Tax Indemnitee" means (i) the Owner Participant, the Owner
            Trustee, in its individual capacity and as trustee under the Trust
            Agreement, the Trust Estate, the Indenture Trustee, (ii) the
            respective Affiliates, successors and permitted assigns of each of
            the entities described in the preceding clause (i), and (iii) the
            Trust Indenture Estate.

                  "Tax Indemnity Agreement" means that certain Tax Indemnity
            Agreement [NW ____ _], dated as of the date hereof, between the
            Owner Participant and Lessee, as originally executed or as modified,
            amended or supplemented pursuant to the applicable provisions
            thereof.

                  "Taxes" means any and all fees (including, without limitation,
            license, recording, documentation and registration fees), taxes
            (including, without limitation, income, gross receipts, sales,
            rental, use, turnover, value added, property (tangible and
            intangible), excise and stamp taxes), license, levies, imposts,
            duties, charges, assessments or withholdings of any nature
            whatsoever, together with any and all penalties, fines, additions to
            tax and interest thereon (each, individually a "Tax").

                  "Term" means the Basic Term and, if actually entered into, any
            Renewal Term.

                  "Termination Date" has the meaning set forth in Section 9(a)
            hereof.

                  "Termination Value" with respect to the Aircraft as of any
            date through and including [_______________], means, but subject
            always to the provisions of Section 3(d)(v) hereof, the amount
            determined by multiplying Lessor's Cost for the Aircraft by the
            percentage specified in Exhibit D hereto opposite the


                                      -13-
<PAGE>

            Termination Date with respect to which the amount is determined (as
            such Exhibit D may be adjusted from time to time as provided in
            Section 3(d) hereof and in Section 7 of the Tax Indemnity
            Agreement).

                  "Transaction Expenses" means: all of the reasonable
            out-of-pocket costs, fees and expenses incurred by the Owner
            Trustee, the Owner Participant, the Pass Through Trustee, the
            Subordination Agent and the Indenture Trustee in connection with the
            transactions contemplated by the Participation Agreement, the other
            Operative Documents, the Pass Through Trust Agreements, the
            Intercreditor Agreement, the Liquidity Facilities and the
            Underwriting Agreement (except, in each case, as otherwise provided
            therein) including, without limitation:

                        (1) the reasonable and actual fees, expenses and
                  disbursements of (A) Bingham Dana LLP, special counsel for the
                  Pass Through Trustee and the Indenture Trustee, (B) Ray,
                  Quinney & Nebeker, special counsel for the Owner Trustee, (C)
                  Shearman & Sterling, special counsel for the Underwriters, (D)
                  Crowe & Dunlevy, P.C., special counsel in Oklahoma City,
                  Oklahoma, and (E) [____________________________], counsel for
                  the Supplier and the Manufacturer;

                        (2) the initial fees and reasonable and actual
                  disbursements of the Owner Trustee under the Trust Agreement;

                        (3) the initial fee and reasonable and actual
                  disbursements of the Indenture Trustee under the Trust
                  Indenture;

                        (4) the initial fees and expenses of the Liquidity
                  Provider, the Pass Through Trustee and the Subordination
                  Agent;

                        (5) underwriting fees and commissions;

                        (6) the fees and expenses with respect to the appraisals
                  of the Aircraft;

                        (7) the reasonable fees, expenses and disbursements of
                  [___________________________], special counsel to the Owner
                  Participant, such fees not to exceed the amount previously
                  agreed to by the Owner Participant and Lessee;

                        (8) the reasonable fees, expenses and disbursements of
                  Simpson Thacher & Bartlett and Cadwalader, Wickersham & Taft,
                  special counsel for Lessee;

                        (9) the costs of filing and recording documents with the
                  FAA and filing Uniform Commercial Code statements in the
                  United States;


                                      -14-
<PAGE>

                        (10) the reasonable fees, expenses and disbursements of
                  Milbank, Tweed, Hadley & McCloy, special counsel to the
                  Liquidity Provider; and

                        (11) the equity placement fee and reasonable
                  disbursements of Babcock and Brown Financial Corporation.

                  "Trust Agreement" means that certain Trust Agreement [NW ____
            _], dated as of the date hereof, between the Owner Participant and
            First Security Bank, National Association, in its individual
            capacity, as originally executed or as modified, amended or
            supplemented pursuant to the applicable provisions thereof,
            including, without limitation, supplementation thereof by one or
            more Trust Supplements entered into pursuant to the applicable
            provisions thereof.

                  "Trust Agreement and Indenture Supplement" or "Trust
            Supplement" means a supplement to the Trust Agreement and the Trust
            Indenture, substantially in the form of Exhibit A to the Trust
            Indenture.

                  "Trust Estate" means the Trust Estate as that term is defined
            in the Trust Agreement.

                  "Trust Indenture" means that certain Trust Indenture and
            Security Agreement [NW ____ __], dated as of the date hereof,
            between Lessor and the Indenture Trustee, as originally executed or
            as modified, amended or supplemented in accordance with the
            provisions thereof.

                  "Trust Indenture Estate" has the meaning assigned to that term
            in the Trust Indenture.

                  "Underwriting Agreement" means that certain Underwriting
            Agreement, dated as of June 18, 1999, among Lessee, the Guarantor,
            and the underwriters named therein.

                  "U.S. Air Carrier" means any Certificated Air Carrier as to
            which there is in force an air carrier operating certificate issued
            pursuant to Part 121 of the regulations under the Federal Aviation
            Act, or which may operate as an air carrier by certification or
            otherwise under any successor or substitute provisions therefor or
            in the absence thereof.

                  "Wet Lease" means any arrangement whereby the Lessee (or any
            Sublessee) agrees to furnish the Airframe and Engines or engines
            installed thereon to a third party pursuant to which such Airframe
            and Engines or engines (i) shall be operated solely by regular
            employees of Lessee (or any Sublessee) possessing all current
            certificates and licenses that would be required under the Federal
            Aviation Act or, if the Aircraft is not registered in the United
            States, all certificates and licenses required by the laws of the
            jurisdiction of registry, for the performance by such employees of
            similar functions within the United States of America or such other
            jurisdiction of registry (it is understood that cabin


                                      -15-
<PAGE>

            attendants need not be regular employees of Lessee (or any
            Sublessee)) and (ii) shall be maintained by Lessee (or any
            Sublessee) in accordance with its normal maintenance practices.

            SECTION 2. Acceptance and Lease. Lessor hereby agrees (subject to
satisfaction of the conditions set forth in Section 4(a) of the Participation
Agreement) to accept the transfer of title from and simultaneously to lease to
Lessee hereunder, and Lessee hereby agrees (subject to satisfaction of the
conditions set forth in Section 4(b) of the Participation Agreement) to lease
from Lessor hereunder, the Aircraft as evidenced by the execution by Lessor and
Lessee of a Lease Supplement leasing the Aircraft hereunder. Lessee hereby
agrees that such acceptance of the Aircraft by Lessor shall, without further
act, irrevocably constitute acceptance by Lessee of such Aircraft for all
purposes of this Lease.

            SECTION 3. Term and Rent. (a) Basic Term. The Basic Term shall
commence on the Delivery Date and end on [__________________], or such earlier
date as this Lease may be terminated in accordance with the provisions hereof.

            (b) [Intentionally Omitted].

            (c) Basic Rent. Lessee shall pay Basic Rent with respect to each
Lease Period during the Basic Term on each Lease Period Date during the Basic
Term, in consecutive installments in the amounts as provided in the next
sentence, each such installment to cover the Lease Period specified in Exhibit
B. Each such installment of Basic Rent shall be equal to Lessor's Cost
multiplied by the percentage for the applicable Lease Period Date specified in
Exhibit B hereto. Lessor and Lessee agree that each installment of Basic Rent
that is indicated to be payable in advance shall be allocated over the six-month
period beginning on the Lease Period Date on which such advance payment is
scheduled to be made, and each installment of Basic Rent that is indicated to be
payable in arrears shall be allocated over the six-month period ending on the
Lease Period Date on which such arrears payment is scheduled to be made.

            (d) Adjustments to Basic Rent.

                  (i) In the event that (A) the Delivery Date occurs other than
            on [____________________], (B) Transaction Expenses paid by Lessor
            pursuant to Section 16(a) of the Participation Agreement are
            determined to be other than [_____]% of Lessor's Cost, or (C) there
            is a change in tax law (including the issuance of proposed
            regulations) after [________________]and on or prior to the Delivery
            Date, then in each case the Basic Rent percentages set forth in
            Exhibit B, the Stipulated Loss Value percentages set forth in
            Exhibit C, the Termination Value percentages set forth in Exhibit D
            [, the Initial Installments, the Remaining Installments] and the
            Special Purchase Price shall be recalculated by the Owner
            Participant, on or prior to [__________________], using the same
            methods and assumptions used to calculate original Basic Rent,
            Stipulated Loss Value and Termination Value percentages [, the
            Initial Installments, the Remaining Installments] and the Special
            Purchase Price in order to: (1) maintain the Owner Participant's Net
            Economic Return and (2) minimize the Net Present Value of Rents to
            Lessee to the extent possible consistent with clause (1) hereof. In
            such


                                      -16-
<PAGE>

            recalculation there will be no change in the amortization of the
            Secured Certificates.

                  (ii) (A) In the event of a refinancing as contemplated by
            Section 17 of the Participation Agreement, then the Basic Rent
            percentages set forth in Exhibit B, the Stipulated Loss Value
            percentages set forth in Exhibit C, the Termination Value
            percentages set forth in Exhibit D [, the Initial Installments, the
            Remaining Installments] and the Special Purchase Price shall be
            recalculated (upwards or downwards) by the Owner Participant as
            contemplated by such Section to (1) maintain the Owner Participant's
            Net Economic Return and (2) to the extent possible consistent with
            clause (1) hereof, minimize the Net Present Value of Rents to Lessee
            and (B) in the event that Lessee elects to satisfy any indemnity
            obligation under the Tax Indemnity Agreement pursuant to Section
            4(d)(ii) of the Tax Indemnity Agreement, then the Basic Rent
            percentages set forth in Exhibit B, the Stipulated Loss Value
            percentages set forth in Exhibit C, the Termination Value
            percentages set forth in Exhibit D [, the Initial Installments, the
            Remaining Installments] and the Special Purchase Price shall be
            recalculated (upwards or downwards) by the Owner Participant, using
            the same methods and assumptions (except to the extent such
            assumptions shall be varied to take into account the Loss (as
            defined in the Tax Indemnity Agreement) that is the subject of such
            indemnification and any prior or contemporaneous Loss) used to
            calculate the Basic Rent percentages, the Stipulated Loss Value
            percentages, the Termination Value percentages [, the Initial
            Installments, the Remaining Installments] and the Special Purchase
            Price on the Delivery Date, in order to (1) maintain the Owner
            Participant's Net Economic Return and (2) to the extent possible
            consistent with clause (1) hereof, minimize the Net Present Value of
            Rents to Lessee.

                  (iii) [Intentionally Omitted].

                  (iv) Any recalculation of Basic Rent, Stipulated Loss Value
            and Termination Value percentages[, the Initial Installments, the
            Remaining Installments] and the Special Purchase Price pursuant to
            this Section 3(d) shall be determined by the Owner Participant and
            shall be subject to the verification procedures set forth in Exhibit
            E hereto. Such recalculated Basic Rent, Stipulated Loss Value and
            Termination Value percentages and Special Purchase Price shall be
            set forth in a Lease Supplement or an amendment to this Lease.

                  (v) Anything contained in the Participation Agreement or this
            Lease to the contrary notwithstanding, each installment of Basic
            Rent payable hereunder, whether or not adjusted in accordance with
            this Section 3(d), shall, and each payment of Termination Value and
            Stipulated Loss Value, whether or not adjusted in accordance with
            this Section 3(d), shall, together with all other amounts (including
            an amount equal to the premium, if any, payable by Lessor on the
            Secured Certificates) payable simultaneously by Lessee pursuant to
            this Lease, in each case be, under any circumstances and in any
            event, in an amount at least sufficient to pay in full, on the date
            on which such amount of Rent is due, any payments then required to
            be made on account of the principal of, premium, if


                                      -17-
<PAGE>

            any, and interest on the Secured Certificates. It is agreed that no
            installment of Basic Rent or payment of Termination Value or
            Stipulated Loss Value shall be increased or adjusted by reason of
            (i) any attachment or diversion of Rent on account of (A) Lessor
            Liens or (B) any Loan Participant Lien on or against the Trust
            Estate, any part thereof or the Operative Documents arising as a
            result of claims against the Indenture Trustee not related to the
            transactions contemplated by the Operative Documents, (ii) any
            modification of the payment terms of the Secured Certificates made
            without the prior written consent of Lessee or (iii) the
            acceleration of any Secured Certificate or Secured Certificates due
            to the occurrence of an "Event of Default" (as defined in the Trust
            Indenture) which does not constitute an Event of Default hereunder.

                  (vi) All adjustments to Basic Rent under this Section 3(d)
            shall be (A) in compliance with the tests of ss.ss. 4.02(5) and 4.07
            of Rev. Proc. 75-28 and will not cause this Lease to constitute a
            "disqualified leaseback or long-term agreement" within the meaning
            of Section 467 of the Internal Revenue Code of 1986, as amended, as
            each is then in effect and (B) subject to verification pursuant to
            Exhibit E.

            (e) Supplemental Rent. Lessee shall pay (or cause to be paid)
promptly to Lessor, or to whomsoever shall be entitled thereto, any and all
Supplemental Rent constituting Stipulated Loss Value or Termination Value as the
same shall become due and owing and all other amounts of Supplemental Rent
within five days after demand or within such other relevant period as may be
provided in any Operative Document, and in the event of any failure on the part
of Lessee to pay any Supplemental Rent when due, Lessor shall have all rights,
powers and remedies provided for herein or in any other Operative Document or by
law or equity or otherwise in the case of nonpayment of Basic Rent. Lessee shall
pay as Supplemental Rent the Make-Whole Amount, if any, due pursuant to Section
2.10(b) or Section 2.11 of the Trust Indenture in connection with a prepayment
of the Secured Certificates upon redemption of such Secured Certificates in
accordance with Section 2.10(b) or Section 2.11 of the Trust Indenture. Lessee
also will pay to Lessor, or to whomsoever shall be entitled thereto, on demand,
as Supplemental Rent, to the extent permitted by applicable law, interest at the
Past Due Rate on any part of any installment of Basic Rent not paid when due for
any period for which the same shall be overdue and on any payment of
Supplemental Rent not paid when due for the period until the same shall be paid.

            (f) Payments in General. All payments of Rent shall be made directly
by Lessee (whether or not any Sublease shall be in effect) by wire transfer of
immediately available funds prior to 10:30 A.M., New York time, on the date of
payment, to Lessor at its account at First Security Bank, National Association,
79 South Main Street, Salt Lake City, Utah 84111, ABA No. 124-0000-12, Account
No. 051-0922115, Attention: Corporate Trust Department, Credit Northwest/NW
[____ __] (or such other account of Lessor in the continental United States as
Lessor shall direct in a notice to Lessee at least 10 Business Days prior to the
date such payment of Rent is due); provided that so long as the Trust Indenture
shall not have been fully discharged, Lessor hereby irrevocably directs and
Lessee agrees, that, unless the Indenture Trustee shall otherwise direct, all
Rent payable to Lessor and assigned to the Indenture Trustee pursuant to the
Trust Indenture shall be paid prior to 10:30 A.M., New York time on the due date


                                      -18-
<PAGE>

thereof in funds of the type specified in this Section 3(f) directly to the
Indenture Trustee at its account at State Street Bank and Trust Company, 225
Franklin Street, Boston, Massachusetts 02110, ABA No. 011-000-028, Account No.
9903-990-1, Attention: Corporate Trust Department, Reference: Northwest/NW [____
__] (or such other account of the Indenture Trustee in the continental United
States as the Indenture Trustee shall direct in a notice to Lessee at least 10
Business Days prior to the date such payment of Rent is due). Lessor hereby
directs and Lessee agrees that all payments of Supplemental Rent owing to the
Indenture Trustee or to a Loan Participant or any other Certificate Holder
pursuant to the Participation Agreement shall be made in Dollars in immediately
available funds prior to 10:30 A.M., New York time, on the due date thereof at
the office of the Indenture Trustee or at such other office of such other
financial institution located in the continental United States as the party
entitled thereto may so direct at least 10 Business Days prior to the due date
thereof. All payments of Supplemental Rent payable to the Owner Participant, to
the extent that such amounts constitute Excluded Payments (as defined in the
Trust Indenture), shall be made in Dollars in immediately available funds prior
to 10:30 A.M., New York time, on the due date thereof, to the account of the
Owner Participant specified in Schedule I to the Participation Agreement (or to
such other account as may be specified in writing by the Owner Participant from
time to time).

            Notwithstanding anything to the contrary contained herein, if any
date on which a payment of Rent becomes due and payable is not a Business Day,
then such payment shall not be made on such scheduled date but shall be made on
the next succeeding Business Day with the same force and effect as if made on
such scheduled date and (provided such payment is made on such next succeeding
Business Day) no interest shall accrue on the amount of such payment from and
after such scheduled date.

            SECTION 4. Lessor's Representations and Warranties. LESSOR LEASES
AND LESSEE TAKES THE AIRCRAFT AND EACH PART THEREOF "AS-IS," "WHERE-IS." NEITHER
LESSOR, THE INDENTURE TRUSTEE NOR ANY PARTICIPANT MAKES, HAS MADE OR SHALL BE
DEEMED TO HAVE MADE, AND EACH HEREBY EXPRESSLY DISCLAIMS AND WILL BE DEEMED TO
HAVE EXPRESSLY DISCLAIMED, ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
AS TO THE TITLE, AIRWORTHINESS, WORKMANSHIP, CONDITION, DESIGN, OPERATION,
MERCHANTABILITY OR FITNESS FOR USE OR A PARTICULAR PURPOSE OF THE AIRCRAFT OR
ANY PART THEREOF, AS TO THE ABSENCE OF LATENT OR OTHER DEFECTS, WHETHER OR NOT
DISCOVERABLE, AS TO THE ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK OR
COPYRIGHT, AS TO THE ABSENCE OF OBLIGATIONS BASED ON STRICT LIABILITY IN TORT,
OR ANY OTHER REPRESENTATION OR WARRANTY WHATSOEVER, EXPRESS OR IMPLIED, WITH
RESPECT TO THE AIRCRAFT OR ANY PART THEREOF, except that First Security Bank,
National Association, in its individual capacity, (i) represents and warrants
that on the Delivery Date, Lessor shall have received whatever title to the
Aircraft was conveyed to it by Lessee, (ii) represents and warrants that on the
Delivery Date the Aircraft shall be free of Lessor Liens (including for this
purpose Liens which would be Lessor Liens but for the proviso in the definition
of Lessor Liens) attributable to it, (iii) covenants that it will not, through
its own actions or inactions, interfere in Lessee's quiet enjoyment of the
Aircraft during the Term, (iv) agrees that it will not directly or indirectly
create, incur, assume or suffer to exist any Lessor Lien attributable to it on
or with respect to the Airframe or any Engine or any portion of the


                                      -19-
<PAGE>

Trust Estate and (v) represents and warrants that it is a Citizen of the United
States without making use of a voting trust, voting powers agreement or similar
arrangement, and agrees that if at any time it shall cease to be a Citizen of
the United States without making use of a voting trust, voting powers agreement
or similar arrangement it will promptly resign as Owner Trustee (if and so long
as such citizenship is necessary under the Federal Aviation Act as in effect at
such time or, if it is not necessary, if and so long as the Owner Trustee's
citizenship would have any material adverse effect on the Loan Participants, the
Owner Participant or Lessee), effective upon the appointment of a successor
Owner Trustee in accordance with Section 9.01 of the Trust Agreement. None of
the provisions of this Lease shall be deemed to amend, modify or otherwise
affect the representations, warranties or other obligations (express or implied)
of the Manufacturer, any subcontractor or supplier of the Manufacturer with
respect to the Airframe, the Engines or any Parts, or to release the
Manufacturer, or any such subcontractor or supplier, from any such
representation, warranty or obligation. Lessor agrees that it will not directly
or indirectly create, incur, assume or suffer to exist any Lessor Lien
attributable to it on or with respect to the Airframe or any Engine.

            SECTION 5. Return of the Aircraft. (a) Condition Upon Return. Unless
purchased by Lessee pursuant to Section 19 hereof, upon the termination of this
Lease at the end of the Basic Term or any Renewal Term or pursuant to Section
9(c) or 15, Lessee, at its own expense, will return the Airframe to Lessor at a
major airport in one of the forty-eight contiguous states of the United States
chosen by Lessee, and Lessee will give Lessor at least ten (10) days' prior
written notice of the place of such return; provided, however, that if Lessor
shall have made the request for storage pursuant to Section 5(d) hereof, Lessee
shall return the Airframe to Lessor at the site of the storage at the end of the
storage period. At the time of such return, Lessee will, unless otherwise
requested by Lessor at least ninety (90) days prior to the return hereunder,
cause the Aircraft, if it is not then so registered, to be registered under the
laws of the United States with the Federal Aviation Administration in the name
of the Lessor or its designee, provided that Lessee shall be relieved of its
obligations under this sentence if (i) such registration is prohibited by reason
of the failure of Lessor or its designee to be eligible on such date to own an
aircraft registered with the Federal Aviation Administration or (ii) such
registration is otherwise prohibited by applicable law; the Airframe will be
fully equipped with the Engines (or other CFM International, Inc. Model
CFM56-5A[3][4] engines or two engines of the same or another manufacturer of not
less than equivalent utility, value and remaining useful life, and suitable for
installation and use on the Airframe without impairing the value, utility or
remaining useful life of the Aircraft; provided that both engines shall be of
the same make and model) duly installed thereon. Also, at the time of such
return, such Airframe and Engines or engines (i) shall be certified (or, if not
then registered under the Federal Aviation Act, shall be eligible for
certification) as an airworthy aircraft by the Federal Aviation Administration,
(ii) shall be free and clear of all Liens (other than Lessor Liens (including
for this purpose Liens which would be Lessor Liens but for the proviso in the
definition of Lessor Liens), Indenture Trustee's Liens and Loan Participant
Liens) and rights of third parties under pooling, interchange, overhaul, repair
or other similar agreements or arrangements, (iii) shall be in as good an
operating condition as when delivered to Lessee hereunder, ordinary wear and
tear excepted, or, in the case of any such engines owned by Lessee, shall have a
value, utility and remaining useful life at least equal to, and shall be in as
good an operating condition as required by the terms hereof with respect to,
Engines constituting part of the Aircraft but not then installed on the
Airframe, and (iv) shall be in compliance with the return conditions, if any,
set forth in Exhibit G.


                                      -20-
<PAGE>

            During the last six (6) months of the Term (unless Lessee shall have
elected to purchase the Aircraft or renew this Lease in accordance with the
terms of this Lease), with reasonable notice, Lessee will cooperate, and cause
any Sublessee to cooperate, in all reasonable respects with the efforts of
Lessor to sell or lease the Aircraft, including, without limitation, permitting
prospective purchasers or lessees to inspect fully the Aircraft and the records
relating thereto, provided that such cooperation shall not interfere with the
operation or maintenance of the Aircraft by Lessee or any Sublessee.

            (b) Return of the Engines. In the event that any engine not owned by
Lessor shall be delivered with the returned Airframe as set forth in paragraph
(a) of this Section 5, Lessee, concurrently with such delivery, will, at no cost
to Lessor, furnish, or cause to be furnished, to Lessor a full warranty (as to
title) bill of sale with respect to each such engine, in form and substance
satisfactory to Lessor (together with an opinion of counsel to the effect that
such full warranty bill of sale has been duly authorized and delivered and is
enforceable in accordance with its terms and that such engines are free and
clear of Liens other than Lessor Liens (including for this purpose Liens which
would be Lessor Liens but for the proviso in the definition of Lessor Liens),
Indenture Trustee's Liens and Loan Participant Liens), against receipt from
Lessor of a bill of sale or other instrument evidencing the transfer, without
recourse or warranty (except as to the absence of Lessor Liens, including for
this purpose Liens which would be Lessor Liens but for the proviso in the
definition of Lessor Liens), by Lessor to Lessee or its designee of all of
Lessor's right, title and interest in and to any Engine constituting part of the
Aircraft but not installed on the Airframe at the time of the return of the
Airframe.

            (c) Fuel; Manuals. Upon the return of the Airframe upon any
termination of this Lease in accordance with paragraph (a) of this Section 5,
(i) Lessor shall pay Lessee, as compensation for any fuel or oil contained in
the fuel or oil tanks of such Airframe, the value of such fuel or oil at the
price paid by Lessee for such fuel or oil, as the case may be, and (ii) Lessee
shall deliver or cause to be delivered to Lessor all logs, manuals and data and
inspection, maintenance, modification and overhaul records required to be
maintained with respect thereto under applicable rules and regulations of each
country under the laws of which the Aircraft has been registered during the
period of operation thereof, which logs, manuals, data and records, if not
maintained in English, shall be translated into English at Lessee's expense.

            (d) Storage Upon Return. If, at least sixty (60) days prior to
termination of this Lease at the end of the Basic Term or any Renewal Term or
pursuant to Section 9(c), Lessee receives from Lessor a written request for
storage of the Aircraft upon its return hereunder, Lessee will provide Lessor,
or cause Lessor to be provided, with free parking facilities for the Aircraft
(maintenance costs and other out-of-pocket costs other than parking fees to be
for the account of Lessor) for a period not exceeding thirty (30) days
commencing on the date of such termination at a location in the continental
United States selected by Lessee and used as a location for the parking or
storage of aircraft; provided that Lessee shall have no obligation to move the
Aircraft from such location during or after the storage period. Lessee, unless
instructed by Lessor to the contrary, will maintain insurance for the Aircraft
during such period not exceeding thirty (30) days and be reimbursed by Lessor
for the premiums thereon.

            SECTION 6. Liens. Lessee will not directly or indirectly create,
incur, assume or suffer to exist any Lien on or with respect to the Aircraft,
title thereto or any interest therein or


                                      -21-
<PAGE>

in this Lease, except (i) the respective rights of Lessor as owner of the
Aircraft and Lessee as herein provided, the Lien of the Trust Indenture, and any
other rights existing pursuant to the Operative Documents, (ii) the rights of
others under agreements or arrangements to the extent permitted by the terms of
Sections 7(b) and 8(b) hereof, (iii) Lessor Liens (including for this purpose
Liens which would be Lessor Liens but for the proviso in the definition of
Lessor Liens), Loan Participant Liens, and Indenture Trustee's Liens, (iv) Liens
for taxes of Lessee (or any Sublessee) either not yet due or being contested in
good faith by appropriate proceedings so long as such proceedings do not involve
any material risk of the sale, forfeiture or loss of the Airframe or any Engine
or any interest therein, or, so long as any Secured Certificates shall be
outstanding, adversely affect the Lien of the Trust Indenture, (v)
materialmen's, mechanics', workmen's, repairmen's, employees' or other like
Liens arising in the ordinary course of Lessee's (or, if a Sublease is then in
effect, Sublessee's) business (including those arising under maintenance
agreements entered into in the ordinary course of business) securing obligations
that are not overdue for a period of more than sixty (60) days or are being
contested in good faith by appropriate proceedings so long as such proceedings
do not involve any material danger of the sale, forfeiture or loss of the
Airframe or any Engine or any interest therein or, so long as any Secured
Certificates shall be outstanding, adversely affect the Lien of the Trust
Indenture, (vi) Liens arising out of any judgment or award against Lessee (or
any Sublessee), unless the judgment secured shall not, within sixty (60) days
after the entry thereof, have been discharged, vacated, reversed or execution
thereof stayed pending appeal or shall not have been discharged, vacated or
reversed within sixty (60) days after the expiration of such stay, (vii) any
other Lien with respect to which Lessee (or any Sublessee) shall have provided a
bond, cash collateral or other security adequate in the reasonable opinion of
Lessor, and (viii) Liens approved in writing by Lessor. Lessee will promptly, at
its own expense, take (or cause to be taken) such actions as may be necessary
duly to discharge any such Lien not excepted above if the same shall arise at
any time.

            SECTION 7. Registration, Maintenance and Operation; Possession and
Subleases; Insignia. (a)(I) Registration and Maintenance. Lessee, at its own
cost and expense, shall (or shall cause any Sublessee to): (i) forthwith upon
the delivery thereof hereunder, cause the Aircraft to be duly registered in the
name of Lessor, and, subject to the second paragraph of this Section 7(a) and
Section 8(f) of the Participation Agreement, to remain duly registered in the
name of Lessor under the Federal Aviation Act, provided that Lessor shall
execute and deliver all such documents as Lessee (or any Sublessee) may
reasonably request for the purpose of effecting and continuing such
registration, and shall not register the Aircraft or permit the Aircraft to be
registered under any laws other than the Federal Aviation Act at any time except
as provided in Section 8(f) of the Participation Agreement and shall cause the
Trust Indenture to be duly recorded and maintained of record as a first mortgage
on the Aircraft; (ii) maintain, service, repair and overhaul (or cause to be
maintained, serviced, repaired and overhauled) the Aircraft so as to keep the
Aircraft in as good an operating condition as when delivered to Lessee
hereunder, ordinary wear and tear excepted, and as may be necessary to enable
the applicable airworthiness certification for the Aircraft to be maintained in
good standing at all times (other than during temporary periods of storage in
accordance with applicable regulations or during maintenance or modification
permitted hereunder) under the Federal Aviation Act, except when all Airbus
Model [A320-200] [A319-100] aircraft powered by engines of the same type as
those with which the Airframe shall be equipped at the time of such grounding
and registered in the United States have been grounded by the FAA (although such
certification need actually be maintained only


                                      -22-
<PAGE>

during such periods as the Aircraft is registered in the United States), or the
applicable laws of any other jurisdiction in which the Aircraft may then be
registered from time to time in accordance with Section 8(f) of the
Participation Agreement, and utilizing, except during any period that a Sublease
is in effect, the same manner and standard of maintenance, service, repair or
overhaul used by Lessee with respect to similar aircraft operated by Lessee in
similar circumstances and utilizing, during any period that a Sublease is in
effect, the same manner and standard of maintenance, service, repair or overhaul
used by the Sublessee with respect to similar aircraft operated by the Sublessee
in similar circumstances; provided, however, that in all circumstances the
Aircraft shall be maintained by Lessee (or any Sublessee) in accordance with
maintenance standards required by, or substantially equivalent to those required
by, the FAA or the central civil aviation authority of Canada, France, Germany,
Japan, the Netherlands or the United Kingdom; (iii) maintain or cause to be
maintained all records, logs and other materials required to be maintained in
respect of the Aircraft by the FAA or the applicable regulatory agency or body
of any other jurisdiction in which the Aircraft may then be registered; and (iv)
promptly furnish or cause to be furnished to Lessor and the Owner Participant
such information as may be required to enable Lessor to file any reports
required to be filed by Lessor or the Owner Participant with any governmental
authority because of Lessor's ownership of the Aircraft. (II) Operation. Lessee
will not maintain, use, service, repair, overhaul or operate the Aircraft (or
permit any Sublessee to maintain, use, service, repair, overhaul or operate the
Aircraft) in violation of any law or any rule, regulation, order or certificate
of any government or governmental authority (domestic or foreign) having
jurisdiction, or in violation of any airworthiness certificate, license or
registration relating to the Aircraft issued by any such authority, except to
the extent Lessee (or, if a Sublease is then in effect, any Sublessee) is
contesting in good faith the validity or application of any such law, rule,
regulation or order in any reasonable manner which does not materially adversely
affect Lessor or, so long as any Secured Certificates shall be outstanding, the
first priority Lien of the Trust Indenture and does not involve any material
risk of sale, forfeiture or loss of the Aircraft. Lessee will not operate the
Aircraft, or permit any Sublessee to operate the Aircraft, in any area excluded
from coverage by any insurance required by the terms of Section 11; provided,
however, that the failure of Lessee to comply with the provisions of this
sentence shall not give rise to an Event of Default hereunder where such failure
is attributable to causes beyond the reasonable control of Lessee (or any
Sublessee) or to extraordinary circumstances involving an isolated occurrence or
series of incidents not in the ordinary course of the regular operations of
Lessee (or any Sublessee) and in each such case Lessee (or such Sublessee, as
the case may be) is taking all reasonable steps to remedy such failure as soon
as is reasonably practicable.

            At any time after the Depreciation Period, Lessor, upon compliance
with all of the terms of Section 8(f) of the Participation Agreement, shall, at
the request and sole expense of Lessee, cooperate with Lessee to take all
actions required to change the registration of the Aircraft to another country.

            (b) Possession and Subleases. Lessee will not, without the prior
written consent of Lessor, sublease or otherwise in any manner deliver, transfer
or relinquish possession of the Airframe or any Engine or install or permit any
Engine to be installed on any airframe other than the Airframe or enter into any
Wet Lease; provided that, so long as no Default of the type referred to in
Section 14(a), 14(b) or 14(e) or Event of Default shall have occurred and be
continuing at the time of such sublease, delivery, transfer or relinquishment of
possession or


                                      -23-
<PAGE>

installation or such Wet Lease, and so long as the action to be taken shall not
deprive the Indenture Trustee of the perfected first priority Lien of the Trust
Indenture on the Airframe or (subject to the further proviso (B) to clause (i)
of this Section 7(b)) any Engine, and so long as Lessee (or any Sublessee) shall
comply with the provisions of Sections 7(a) and 11 hereof, Lessee (or, except
with respect to clause (x) below, any Sublessee) may, without the prior written
consent of Lessor:

                  (i) subject the Airframe and the Engines or engines then
            installed thereon to normal interchange agreements or any Engine to
            normal pooling or similar arrangements, in each case customary in
            the airline industry and entered into by Lessee (or, if a Sublease
            is then in effect, by Sublessee) in the ordinary course of its
            business; provided that (A) no such agreement or arrangement
            contemplates or requires the transfer of title to the Airframe, (B)
            if Lessor's title to any Engine shall be divested under any such
            agreement or arrangement, such divestiture shall be deemed to be an
            Event of Loss with respect to such Engine and Lessee shall (or shall
            cause Sublessee to) comply with Section 10(b) hereof in respect
            thereof, and (C) any interchange agreement to which the Airframe may
            be subject shall be with a U.S. Air Carrier or a Foreign Air
            Carrier;

                  (ii) deliver possession of the Airframe or any Engine to the
            manufacturer thereof (or for delivery thereto) or to any
            organization (or for delivery thereto) for testing, service, repair,
            maintenance or overhaul work on the Airframe or Engine or any part
            of any thereof or for alterations or modifications in or additions
            to such Airframe or Engine to the extent required or permitted by
            the terms of Section 8(c) hereof;

                  (iii) install an Engine on an airframe which is owned by
            Lessee (or any Sublessee) free and clear of all Liens, except: (A)
            Permitted Liens and those which apply only to the engines (other
            than Engines), appliances, parts, instruments, appurtenances,
            accessories, furnishings and other equipment (other than Parts)
            installed on such airframe (but not to the airframe as an entirety),
            (B) the rights of third parties under interchange agreements which
            would be permitted under clause (i) above, provided that Lessor's
            title to such Engine and, if any Secured Certificates shall be
            outstanding, the first priority Lien of the Trust Indenture shall
            not be divested or impaired as a result thereof and (C) mortgage
            liens or other security interests, provided that (as regards this
            clause (C)) such mortgage liens or other security interests
            effectively provide that such Engine shall not become subject to the
            lien of such mortgage or security interest, notwithstanding the
            installation thereof on such airframe;

                  (iv) install an Engine on an airframe leased to Lessee (or any
            Sublessee) or purchased by Lessee (or any Sublessee) subject to a
            conditional sale or other security agreement, provided that (x) such
            airframe is free and clear of all Liens, except: (A) the rights of
            the parties to the lease or conditional sale or other security
            agreement covering such airframe, or their assignees, and (B) Liens
            of the type permitted by subparagraph (iii) of this paragraph (b)
            and (y) such lease, conditional sale or other security agreement
            effectively provides that such Engine


                                      -24-
<PAGE>

            shall not become subject to the lien of such lease, conditional sale
            or other security agreement, notwithstanding the installation
            thereof on such airframe;

                  (v) install an Engine on an airframe owned by Lessee (or any
            Sublessee), leased to Lessee (or any Sublessee) or purchased by
            Lessee (or any Sublessee) subject to a conditional sale or other
            security agreement under circumstances where neither subparagraph
            (iii) nor subparagraph (iv) of this paragraph (b) is applicable,
            provided that such installation shall be deemed an Event of Loss
            with respect to such Engine and Lessee shall (or shall cause any
            Sublessee to) comply with Section 10(b) hereof in respect thereof,
            Lessor not intending hereby to waive any right or interest it may
            have to or in such Engine under applicable law until compliance by
            Lessee with such Section 10(b);

                  (vi) to the extent permitted by Section 8(b) hereof, subject
            any appliances, Parts or other equipment owned by Lessor and removed
            from the Airframe or any Engine to any pooling arrangement referred
            to in Section 8(b) hereof;

                  (vii) subject (or permit any Sublessee to subject) the
            Airframe or any Engine to the Civil Reserve Air Fleet Program and
            transfer (or permit any Sublessee to transfer) possession of the
            Airframe or any Engine to the United States of America or any
            instrumentality or agency thereof pursuant to the Civil Reserve Air
            Fleet Program, so long as Lessee (or any Sublessee) shall (A)
            promptly notify Lessor upon subjecting the Airframe or any Engine to
            the Civil Reserve Air Fleet Program in any contract year and provide
            Lessor with the name and address of the Contracting Office
            Representative for the Air Mobility Command of the United States Air
            Force to whom notice must be given pursuant to Section 15 hereof,
            and (B) promptly notify Lessor upon transferring possession of the
            Airframe or any Engine to the United States of America or any agency
            or instrumentality thereof pursuant to such program;

                  (viii) for a period not to extend beyond the end of the Term,
            enter into a Wet Lease for the Airframe and Engines or engines then
            installed thereon with any third party; provided that if Lessee (or
            any Sublessee) shall enter into any Wet Lease for a period of more
            than one year (including renewal options) Lessee shall provide
            Lessor written notice of such Wet Lease (such notice to be given
            prior to entering into such Wet Lease, if practicable, but in any
            event promptly after entering into such Wet Lease);

                  (ix) for a period not to extend beyond the end of the Term,
            transfer possession of the Airframe or any Engine to the United
            States of America or any instrumentality or agency thereof pursuant
            to a contract, a copy of which shall be provided to Lessor; or

                  (x) Lessee may, at any time, enter into any sublease with (1)
            a U.S. Air Carrier, (2) any Person approved in writing by Lessor,
            which approval shall not be unreasonably withheld or (3) after the
            Depreciation Period, any Permitted


                                      -25-
<PAGE>

            Sublessee if (A) in any such case, the Sublessee under such sublease
            is not subject to a proceeding or final order under applicable
            bankruptcy, insolvency or reorganization laws on the date such
            sublease is entered into, (B) in the event that the Sublessee under
            such sublease is a foreign air carrier (other than a foreign air
            carrier principally based in Taiwan), the United States maintains
            diplomatic relations with the country in which such proposed
            Sublessee is principally based at the time such sublease is entered
            into (or, in the case of a sublease to a proposed Sublessee
            principally based in Taiwan, maintains diplomatic relations at least
            as good as those in effect on the Delivery Date) and (C) in the
            event that the Sublessee under such sublease is a foreign air
            carrier, Lessor and the Indenture Trustee shall have received an
            opinion of counsel to Lessee to the effect that (I) the terms of the
            proposed sublease will be legal, valid, binding and (subject to
            customary exceptions in foreign opinions generally) enforceable
            against the proposed Sublessee in the country in which the proposed
            Sublessee is principally based, (II) there exist no possessory
            rights in favor of the Sublessee under such Sublease under the laws
            of such Sublessee's country of domicile that would, upon bankruptcy
            or insolvency of or other default by Lessee and assuming at such
            time such Sublessee is not insolvent or bankrupt, prevent the return
            or repossession of the Aircraft in accordance with the terms of this
            Lease, (III) the laws of such Sublessee's country of domicile
            require fair compensation by the government of such jurisdiction
            payable in currency freely convertible into Dollars for the loss of
            use of the Aircraft in the event of the requisition by such
            government of such use, and (IV) the laws of such Sublessee's
            country of domicile would give recognition to Lessor's title to the
            Aircraft, to the registry of the Aircraft in the name of the Lessor
            (or Lessee, as "lessee", or the proposed Sublessee, as "sublessee",
            as appropriate) and to the Lien of the Trust Indenture, provided,
            however, that no sublease entered into pursuant to this clause (x)
            shall extend beyond the expiration of the Basic Term or any Renewal
            Term then in effect unless Lessee shall have irrevocably committed
            to purchase the Aircraft.

            The rights of any Sublessee or other transferee who receives
possession by reason of a transfer permitted by this paragraph (b) (other than
the transfer of an Engine which is deemed an Event of Loss) shall be effectively
subject and subordinate to, and any Sublease permitted by this paragraph (b)
shall be expressly subject and subordinate to, all the terms of this Lease and
to the Lien of the Trust Indenture, including, without limitation, the covenants
contained in Section 7(a) hereof and Lessor's rights to repossession pursuant to
Section 15 hereof and to avoid such Sublease upon such repossession, and Lessee
shall remain primarily liable hereunder for the performance of all of the terms
of this Lease to the same extent as if such Sublease or transfer had not
occurred, and, except as otherwise provided herein, the terms of any such
Sublease shall not permit any Sublessee to take any action not permitted to be
taken by Lessee in this Lease with respect to the Aircraft. No pooling
agreement, sublease or other relinquishment of possession of the Airframe or any
Engine or Wet Lease shall in any way discharge or diminish any of Lessee's
obligations to Lessor hereunder or constitute a waiver of Lessor's rights or
remedies hereunder. Any sublease permitted under this Section 7(b) shall
expressly prohibit any further sub-sublease by the Sublessee. Lessor agrees, for
the benefit of Lessee (and any Sublessee) and for the benefit of any mortgagee
or other holder of a security interest in any engine (other than an Engine)
owned by Lessee (or any Sublessee), any lessor of


                                      -26-
<PAGE>

any engine (other than an Engine) leased to Lessee (or any Sublessee) and any
conditional vendor of any engine (other than an Engine) purchased by Lessee (or
any Sublessee) subject to a conditional sale agreement or any other security
agreement, that no interest shall be created hereunder in any engine so owned,
leased or purchased and that none of Lessor, its successors or assigns will
acquire or claim, as against Lessee (or any Sublessee) or any such mortgagee,
lessor or conditional vendor or other holder of a security interest or any
successor or assignee of any thereof, any right, title or interest in such
engine as the result of such engine being installed on the Airframe; provided,
however, that such agreement of Lessor shall not be for the benefit of any
lessor or secured party of any airframe (other than the Airframe) leased to
Lessee (or any Sublessee) or purchased by Lessee (or any Sublessee) subject to a
conditional sale or other security agreement or for the benefit of any mortgagee
of or any other holder of a security interest in an airframe owned by Lessee (or
any Sublessee), unless such lessor, conditional vendor, other secured party or
mortgagee has expressly agreed (which agreement may be contained in such lease,
conditional sale or other security agreement or mortgage) that neither it nor
its successors or assigns will acquire, as against Lessor, any right, title or
interest in an Engine as a result of such Engine being installed on such
airframe. Lessee shall provide to the Owner Participant and the Indenture
Trustee (i) written notice of any Sublease hereunder (such notice to be given
not later than five days prior to entering into such Sublease, if practicable,
but in any event promptly after entering into any such Sublease) and (ii) a copy
of each Sublease which has a term of more than three months.

            (c) Insignia. On or prior to the Delivery Date, or as soon as
practicable thereafter, Lessee agrees to affix and maintain (or cause to be
affixed and maintained), at its expense, in the cockpit of the Airframe adjacent
to the airworthiness certificate therein and on each Engine a nameplate bearing
the inscription:

                                   Leased From

          First Security Bank, National Association, as Owner Trustee,
                                     Lessor

and, for so long as the Airframe and each Engine shall be subject to the Lien of
the Trust Indenture, bearing the following additional inscription:

                                  Mortgaged To

                      State Street Bank and Trust Company,
                              as Indenture Trustee

(such nameplate to be replaced, if necessary, with a nameplate reflecting the
name of any successor Lessor or successor Indenture Trustee, in each case as
permitted under the Operative Documents). Except as above provided, Lessee will
not allow the name of any Person to be placed on the Airframe or on any Engine
as a designation that might be interpreted as a claim of ownership; provided
that nothing herein contained shall prohibit Lessee (or any Sublessee) from
placing its customary colors and insignia on the Airframe or any Engine.


                                      -27-
<PAGE>

            SECTION 8. Replacement and Pooling of Parts; Alterations,
Modifications and Additions. (a) Replacement of Parts. Lessee, at its own cost
and expense, will promptly replace or cause to be replaced all Parts which may
from time to time be incorporated or installed in or attached to the Airframe or
any Engine and which may from time to time become worn out, lost, stolen,
destroyed, seized, confiscated, damaged beyond repair or permanently rendered
unfit for use for any reason whatsoever, except as otherwise provided in
paragraph (c) of this Section 8 or if the Airframe or an Engine to which a Part
relates has suffered an Event of Loss. In addition, Lessee (or any Sublessee)
may, at its own cost and expense, remove in the ordinary course of maintenance,
service, repair, overhaul or testing, any Parts, whether or not worn out, lost,
stolen, destroyed, seized, confiscated, damaged beyond repair or permanently
rendered unfit for use, provided that Lessee (or any Sublessee), except as
otherwise provided in paragraph (c) of this Section 8, will, at its own cost and
expense, replace such Parts as promptly as practicable. All replacement Parts
shall be free and clear of all Liens (except for Permitted Liens and pooling
arrangements to the extent permitted by paragraph (b) of this Section 8 and
except in the case of replacement property temporarily installed on an emergency
basis) and shall be in as good operating condition as, and shall have a value
and utility at least equal to, the Parts replaced assuming such replaced Parts
were in the condition and repair required to be maintained by the terms hereof.
Except as otherwise provided in paragraph (c) of this Section 8, all Parts at
any time removed from the Airframe or any Engine shall remain the property of
Lessor, no matter where located, until such time as such Parts shall be replaced
by Parts which have been incorporated or installed in or attached to the
Airframe or such Engine and which meet the requirements for replacement Parts
specified above. Immediately upon any replacement part becoming incorporated or
installed in or attached to the Airframe or any Engine as above provided,
without further act (subject only to Permitted Liens and any pooling arrangement
to the extent permitted by paragraph (b) of this Section 8 and except in the
case of replacement property temporarily installed on an emergency basis), (i)
title to such replacement Part shall thereupon vest in Lessor, (ii) such
replacement Part shall become subject to this Lease and be deemed part of the
Airframe or such Engine for all purposes hereof to the same extent as the Parts
originally incorporated or installed in or attached to the Airframe or such
Engine, and (iii) title to the replaced Part shall thereupon vest in Lessee (or,
if a Sublease is then in effect, any Sublessee), free and clear of all rights of
Lessor, and shall no longer be deemed a Part hereunder.

            (b) Pooling of Parts. Any Part removed from the Airframe or any
Engine as provided in paragraph (a) of this Section 8 may be subjected by Lessee
(or any Sublessee) to a normal pooling arrangement customary in the airline
industry of which Lessee (or, if a Sublease is then in effect, any Sublessee) is
a party entered into in the ordinary course of Lessee's (or any Sublessee's)
business; provided that the Part replacing such removed Part shall be
incorporated or installed in or attached to such Airframe or Engine in
accordance with such paragraph (a) as promptly as practicable after the removal
of such removed Part. In addition, any replacement Part when incorporated or
installed in or attached to the Airframe or any Engine in accordance with such
paragraph (a) may be owned by any third party subject to such a normal pooling
arrangement, provided that Lessee (or any Sublessee), at its expense, as
promptly thereafter as practicable, either (i) causes title to such replacement
Part to vest in Lessor in accordance with such paragraph (a) by Lessee (or any
Sublessee) acquiring title thereto for the benefit of, and transferring such
title to, Lessor free and clear of all Liens except Permitted Liens (other than
pooling arrangements) or (ii) replaces such replacement Part by incorporating or
installing in or attaching to the Airframe or Engine a further replacement Part
owned by Lessee (or any


                                      -28-
<PAGE>

Sublessee) free and clear of all Liens except Permitted Liens (other than
pooling arrangements) and by causing title to such further replacement Part to
vest in Lessor in accordance with such paragraph (a).

            (c) Alterations, Modifications and Additions. Lessee, at its own
expense, will make (or cause to be made) such alterations and modifications in
and additions to the Airframe and Engines as may be required from time to time
to meet the applicable standards of the FAA or any other governmental authority
having jurisdiction; provided, however, that Lessee (or, if a Sublease is then
in effect, any Sublessee) may, in good faith, contest the validity or
application of any such law, rule, regulation or order in any reasonable manner
which does not adversely affect Lessor or, so long as any Secured Certificates
are outstanding, the Indenture Trustee. In addition, Lessee (or any Sublessee),
at its own expense, may from time to time add further parts or accessories and
make such alterations and modifications in and additions to the Airframe or any
Engine as Lessee (or any Sublessee) may deem desirable in the proper conduct of
its business, including, without limitation, removal of Parts which Lessee (or
any Sublessee) has determined in its reasonable judgment to be obsolete or no
longer suitable or appropriate for use on the Airframe or such Engine (such
parts, "Obsolete Parts"); provided that no such alteration, modification or
addition shall materially diminish the value, utility or remaining useful life
of the Airframe or such Engine below the value, utility or remaining useful life
thereof immediately prior to such alteration, modification or addition, assuming
the Airframe or such Engine was then in the condition required to be maintained
by the terms of this Lease, except that the value (but not the utility or
remaining useful life) of the Airframe or any Engine may be reduced by the value
of Obsolete Parts which shall have been removed so long as the aggregate value
of all Obsolete Parts which shall have been removed and not replaced shall not
exceed $400,000. Title to all Parts incorporated or installed in or attached or
added to the Airframe or an Engine as the result of such alteration,
modification or addition (the "Additional Parts") shall, without further act,
vest in Lessor. Notwithstanding the foregoing sentence, Lessee (or any
Sublessee) may remove or suffer to be removed any Additional Part, provided that
such Additional Part (i) is in addition to, and not in replacement of or
substitution for, any Part originally incorporated or installed in or attached
to the Airframe or any Engine at the time of delivery thereof hereunder or any
Part in replacement of, or substitution for, any such Part, (ii) is not required
to be incorporated or installed in or attached or added to the Airframe or any
Engine pursuant to the terms of Section 7 hereof or the first sentence of this
paragraph (c) and (iii) can be removed from the Airframe or such Engine without
diminishing or impairing the value, utility or remaining useful life which the
Airframe or such Engine would have had at the time of removal had such
alteration, modification or addition not occurred, assuming that such Airframe
or Engine was in the condition and repair required to be maintained by the terms
hereof. Upon the removal by Lessee (or Sublessee) of any Part as provided above,
title thereto shall, without further act, vest in Lessee (or any Sublessee, as
the case may be) and such Part shall no longer be deemed part of the Airframe or
Engine from which it was removed. Any Part not removed by Lessee (or any
Sublessee) as above provided prior to the return of the Airframe or Engine to
Lessor hereunder shall remain the property of Lessor.

            SECTION 9. Voluntary Termination. (a) Termination Event. (1)
[Intentionally Omitted].


                                      -29-
<PAGE>

            (2) Lessee shall have the right to elect to terminate this Lease on
any Lease Period Date occurring on or after the fifth anniversary of the
Delivery Date if Lessee shall have made the good faith determination, which
shall be evidenced by a resolution duly adopted by its Board of Directors (or
the Executive Committee thereof), that the Aircraft is obsolete or surplus to
its needs.

            (3) Lessee shall give to Lessor at least ninety (90) days' revocable
advance written notice of Lessee's intention to so terminate this Lease (any
such notice, a "Termination Notice") specifying (i) the Lease Period Date on
which Lessee intends to terminate this Lease in accordance with this Section 9
(such specified date, a "Termination Date") and (ii) that Lessee has determined
that the Aircraft is obsolete or surplus to its needs. Any Termination Notice
shall become irrevocable fifteen (15) days prior to the Termination Date.

            (b) [Intentionally Omitted].

            (c) Optional Sale of the Aircraft. In the event that Lessee shall
have exercised its right to terminate this Lease under Section 9(a)(2), then
during the period from the giving of the notice referred to in Section 9(a)(3)
until the proposed Termination Date (unless Lessee shall have revoked the
Termination Notice specifying such proposed Termination Date), Lessee, as agent
for Lessor and at no expense to Lessor, shall use commercially reasonable
efforts to obtain all-cash bids in the worldwide market for the purchase of the
Aircraft and, in the event it receives any bid, Lessee shall, within five
Business Days after receipt thereof and at least ten Business Days prior to the
proposed Termination Date, certify to Lessor in writing the amount and terms of
such bid, and the name and address of the party or parties (who shall not be
Lessee or any Affiliate of Lessee or any Person with whom Lessee or any such
Affiliate has an arrangement or understanding regarding the future use of the
Aircraft by Lessee or any such Affiliate but who may be the Owner Participant,
any Affiliate thereof or any Person contacted by the Owner Participant)
submitting such bid. After Lessee shall have certified to Lessor all bids
received, the Owner Participant, any Affiliate thereof or any Person contacted
by the Owner Participant may submit a further bid or bids to Lessee not later
than five Business Days prior to the Termination Date proposed by Lessee (unless
Lessee shall have revoked the Termination Notice specifying such proposed
Termination Date). Subject to the next succeeding sentence, on or before the
Termination Date, subject to the release of all mortgage and security interests
with respect to the Aircraft under the Trust Indenture: (1) Lessee shall deliver
the Aircraft, or cause the Aircraft to be delivered, to the bidder(s), if any,
which shall have submitted the highest all-cash bid therefor at least ten (or,
in the case of the Owner Participant, any Affiliate thereof, or Person contacted
by the Owner Participant, five) Business Days prior to such Termination Date, in
the same manner and in the same condition and otherwise in accordance with all
the terms of this Lease as if delivery were made to Lessor pursuant to Section
5, and shall duly transfer to Lessor title to any engines not owned by Lessor
all in accordance with the terms of Section 5, (2) Lessor shall comply with the
terms of the Trust Indenture and shall, without recourse or warranty (except as
to the absence of Lessor Liens, including for this purpose Liens which would be
Lessor Liens but for the proviso in the definition of Lessor Liens), subject to
prior or concurrent payment by Lessee of all amounts due under clause (3) of
this sentence, sell all of Lessor's right, title and interest in and to the
Aircraft for cash in Dollars to such bidder(s), the total sales price realized
at such sale to be retained by Lessor, and (3) Lessee shall simultaneously pay
or cause to be paid to Lessor in funds of the type specified in Section 3(f)
hereof, an amount equal to the sum of (A)


                                      -30-
<PAGE>

the excess, if any, of (i) the Termination Value for the Aircraft, computed as
of the Termination Date, over (ii) the net cash proceeds from the sale of the
Aircraft after deducting the reasonable expenses incurred by Lessor in
connection with such sale, (B) all unpaid Basic Rent with respect to the
Aircraft due prior to such Termination Date and, if such Basic Rent is payable
in arrears on such Termination Date as indicated on Exhibit B, on such
Termination Date, and all unpaid Supplemental Rent due on or prior to the
Termination Date with respect to the Aircraft, and (C) the Make-Whole Amount, if
any, due on the Secured Certificates, and upon such payment Lessor
simultaneously will transfer to Lessee, without recourse or warranty (except as
to the absence of Lessor Liens, including for this purpose Liens which would be
Lessor Liens but for the proviso in the definition of Lessor Liens), all of
Lessor's right, title and interest in and to any Engines constituting part of
the Aircraft which were not sold with the Aircraft. Notwithstanding the
preceding sentence, Lessor may, if Lessee has not revoked the Termination
Notice, elect to retain title to the Aircraft. If Lessor so elects, Lessor shall
give to Lessee written notice of such election at least five Business Days prior
to the Termination Date accompanied by an irrevocable undertaking by the Owner
Participant to make available to Lessor for payment to the Indenture Trustee on
the Termination Date the amount required to pay in full the unpaid principal
amount of the Secured Certificates outstanding on the Termination Date plus
interest accrued thereon through the Termination Date, together with the
Make-Whole Amount, if any, due on the Secured Certificates. Upon receipt of
notice of such an election by Lessor and the accompanying undertaking by the
Owner Participant, Lessee shall cease its efforts to obtain bids as provided
above and shall reject all bids theretofore or thereafter received. On the
Termination Date, Lessor shall (subject to the payment by Lessee of all Rent due
on or prior to such date as set forth below) pay in full the unpaid principal
amount of the Secured Certificates outstanding on the Termination Date plus
interest accrued thereon through the Termination Date together with all
Make-Whole Amount, if any, due on the Secured Certificates and, so long as the
Secured Certificates are paid as aforesaid, Lessee shall deliver the Airframe
and Engines or engines to Lessor in accordance with Section 5 and shall pay all
Basic Rent due prior to the Termination Date and, if such Basic Rent is payable
in arrears on such Termination Date as indicated on Exhibit B, on such
Termination Date, and all Supplemental Rent (other than Make-Whole Amount or
Termination Value) due on or prior to the Termination Date. If no sale shall
have occurred on the Termination Date and Lessor has not made the payment
contemplated by the preceding sentence and thereby caused this Lease to
terminate, or if Lessee revokes its Termination Notice, this Lease shall
continue in full force and effect as to the Aircraft, Lessee shall pay the
reasonable costs and expenses incurred by the Owner Participant and Lessor
(unless such failure to terminate the Lease is a consequence of the failure of
Lessor or the Owner Participant without due cause to make, or cause to be made,
the payment referred to in the immediately preceding sentence), if any, in
connection with preparation for such sale and Lessee may give one or more
additional Termination Notices in accordance with Sections 9(a)(2) and 9(a)(3),
subject to the last sentence of this Section 9(c). In the event of any such sale
or such retention of the Aircraft by Lessor and upon compliance by Lessee with
the provisions of this paragraph, the obligation of Lessee to pay Basic Rent or
any other amounts hereunder shall cease to accrue and this Lease shall
terminate. Lessor may, but shall be under no duty to, solicit bids, inquire into
the efforts of Lessee to obtain bids or otherwise take any action in connection
with any such sale other than to transfer (in accordance with the foregoing
provisions) to the purchaser named in the highest bid certified by Lessee to
Lessor all of Lessor's right, title and


                                      -31-
<PAGE>

interest in the Aircraft, against receipt of the payments provided herein.
Lessee may revoke a Termination Notice given pursuant to Section 9(a)(3) no more
than two times during the Term.

            (d) Termination as to Engines. So long as no Event of Default shall
have occurred and be continuing, Lessee shall have the right at its option at
any time during the Term, on at least thirty (30) days' prior written notice, to
terminate this Lease with respect to any Engine. In such event, and prior to the
date of such termination, Lessee shall replace such Engine hereunder by
complying with the terms of Section 10(b) to the same extent as if an Event of
Loss had occurred with respect to such Engine, and Lessor shall transfer such
right, title and interest as it may have to the replaced Engine as provided in
Section 5(b). No termination of this Lease with respect to any Engine as
contemplated by this Section 9(d) shall result in any reduction of Basic Rent.

            SECTION 10. Loss, Destruction, Requisition, etc. (a) Event of Loss
with Respect to the Aircraft. Upon the occurrence of an Event of Loss with
respect to the Airframe or the Airframe and the Engines and/or engines then
installed thereon, Lessee shall forthwith (and in any event, within fifteen (15)
days after such occurrence) give Lessor written notice of such Event of Loss,
and within forty-five (45) days after such Event of Loss Lessee shall give
Lessor written notice of its election to perform one of the following options
(it being agreed that if Lessee shall not have given such notice of election
within such period, Lessee shall be deemed to have elected the option set forth
in clause (i) below). Lessee may elect either to:

                  (i) make the payments specified in this clause (i), in which
            event not later than the earlier of (x) the Business Day next
            succeeding the 120th day following the occurrence of such Event of
            Loss or (y) an earlier Business Day irrevocably specified fifteen
            (15) days in advance by notice from Lessee to Lessor and the
            Indenture Trustee (the "Loss Payment Date"), Lessee shall pay or
            cause to be paid to Lessor in funds of the type specified in Section
            3(f) hereof, an amount equal to the Stipulated Loss Value of the
            Aircraft corresponding to the Stipulated Loss Value Date occurring
            on or immediately following the Loss Payment Date; provided,
            however, that if a Lease Period Date shall occur on or prior to the
            Loss Payment Date with respect to which Stipulated Loss Value is
            determined, Lessee shall pay on such Lease Period Date (A) if the
            Lease Period Date occurs on the Loss Payment Date with respect to
            which Stipulated Loss Value is determined, an amount equal to the
            Basic Rent that would have been due on such Lease Period Date (but
            only to the extent payable in arrears as indicated on Exhibit B) if
            such Event of Loss had not occurred and (B) if the Lease Period Date
            occurs prior to the Loss Payment Date with respect to which
            Stipulated Loss Value is determined, an amount equal to the Basic
            Rent that would have been due on such Lease Period Date if such
            Event of Loss had not occurred, or

                  (ii) substitute an aircraft or an airframe or an airframe and
            one or more engines, as the case may be;

provided that, if Lessee does not perform its obligation to effect such
substitution in accordance with this Section 10(a) during the period of time
provided herein, then Lessee shall pay or cause


                                      -32-
<PAGE>

to be paid to Lessor on the Business Day next succeeding the 120th day following
the occurrence of such Event of Loss the amount specified in clause (i) above.

            At such time as Lessor shall have received the amounts specified in
subparagraph (i) above, together with all other amounts that then may be due
hereunder (including, without limitation, all Basic Rent due before the date of
such payment and all Supplemental Rent), under the Participation Agreement and
under the Tax Indemnity Agreement, (1) the obligation of Lessee to pay the
installments of Basic Rent, Supplemental Rent, Stipulated Loss Value,
Termination Value or any other amount shall cease to accrue, (2) this Lease
shall terminate, (3) Lessor will comply with the terms of the Trust Indenture
and transfer to or at the direction of Lessee, without recourse or warranty
(except as to the absence of Lessor Liens, including for this purpose Liens
which would be Lessor Liens but for the proviso in the definition of Lessor
Liens), all of Lessor's right, title and interest in and to the Airframe and any
Engines subject to such Event of Loss, as well as any Engines not subject to
such Event of Loss, and furnish to or at the direction of Lessee a bill of sale
in form and substance reasonably satisfactory to Lessee (or any Sublessee),
evidencing such transfer, and (4) Lessee will be subrogated to all claims of
Lessor, if any, against third parties, for damage to or loss of the Airframe and
any Engines which were subject to such Event of Loss to the extent of the then
insured value of the Aircraft.

            In the event Lessee shall elect to substitute an aircraft (or an
airframe or an airframe and one or more engines, as the case may be) Lessee
shall, at its sole expense, not later than the Business Day next succeeding the
120th day following the occurrence of such Event of Loss, (A) convey or cause to
be conveyed to Lessor and to be leased by Lessee hereunder, an aircraft (or an
airframe or an airframe and one or more engines which, together with the Engines
constituting a part of the Aircraft but not installed thereon at the time of
such Event of Loss constitute the Aircraft) free and clear of all Liens (other
than Permitted Liens) and having a value, utility and remaining useful life
(without regard to hours or cycles) at least equal to the Aircraft subject to
such Event of Loss assuming no Event of Loss had occurred and that the Aircraft
had been maintained in accordance with this Lease; provided that any aircraft,
airframe or engine so substituted hereunder shall be of the same or improved
model as those initially leased hereunder and (B) prior to or at the time of any
such substitution, Lessee (or any Sublessee), at its own expense, will (1)
furnish Lessor with a full warranty bill of sale and a Federal Aviation
Administration bill of sale, in form and substance reasonably satisfactory to
Lessor, evidencing such transfer of title, (2) cause a Lease Supplement and a
Trust Supplement to be duly executed by Lessee and filed for recording pursuant
to the Federal Aviation Act, or the applicable laws, rules and regulations of
any other jurisdiction in which the Airframe may then be registered as permitted
by Section 8(f) of the Participation Agreement, (3) cause a financing statement
or statements with respect to such substituted property to be filed in such
place or places as are deemed necessary or desirable by Lessor to perfect its
and the Indenture Trustee's interest therein and herein, (4) furnish Lessor with
such evidence of compliance with the insurance provisions of Section 11 with
respect to such substituted property as Lessor may reasonably request, (5)
furnish Lessor with copies of the documentation required to be provided by
Lessee pursuant to Section 5.06 of the Trust Indenture (whether or not the Trust
Indenture is then in effect), and Lessor simultaneously will comply with the
terms of the Trust Indenture and transfer to or at the direction of Lessee,
without recourse or warranty (except as to the absence of Lessor Liens,
including for this purpose Liens which would be Lessor Liens but for the proviso
in the definition of Lessor Liens), all of Lessor's right, title and interest,
if any, in and to the


                                      -33-
<PAGE>

Aircraft or the Airframe and one or more Engines, as the case may be, with
respect to which such Event of Loss occurred and furnish to or at the direction
of Lessee a bill of sale in form and substance reasonably satisfactory to Lessee
(or any Sublessee), evidencing such transfer, (6) furnish Lessor with an opinion
of counsel (which shall be Cadwalader, Wickersham & Taft and, if not, other
counsel chosen by Lessee and reasonably acceptable to Lessor) reasonably
satisfactory to Lessor to the effect that Lessor and the Indenture Trustee as
assignee of Lessor will be entitled to the benefits of Section 1110 of the U.S.
Bankruptcy Code with respect to the substitute aircraft, provided that such
opinion need not be delivered to the extent that immediately prior to such
substitution the benefits of Section 1110 of the U.S. Bankruptcy Code were not,
solely by reason of a change in law or governmental interpretation thereof,
available to Lessor and, so long as any Secured Certificates are outstanding,
the Indenture Trustee as assignee of Lessor's rights under the Lease with
respect to the Aircraft, and (7) Lessee will be subrogated to all claims of
Lessor, if any, against third parties for damage to or loss of the Airframe and
any Engine which were subject to such Event of Loss to the extent of the then
insured value of the Aircraft. For all purposes hereof, the property so
substituted shall after such transfer be deemed part of the property leased
hereunder and shall be deemed an "Aircraft", "Airframe" and "Engine", as the
case may be, as defined herein. No Event of Loss with respect to the Airframe or
the Airframe and the Engines or engines then installed thereon for which
substitution has been elected pursuant to Section 10(a)(ii) hereof shall result
in any reduction in Basic Rent.

            (b) Event of Loss with Respect to an Engine. Upon the occurrence of
an Event of Loss with respect to an Engine under circumstances in which there
has not occurred an Event of Loss with respect to the Airframe, Lessee shall
forthwith (and in any event, within fifteen days after such occurrence) give
Lessor written notice thereof and shall, within sixty (60) days after the
occurrence of such Event of Loss, convey or cause to be conveyed to Lessor, as
replacement for the Engine with respect to which such Event of Loss occurred,
title to another CFM International, Inc. Model CFM56-5A[3][4] engine (or engine
of the same or another manufacturer of the same, an equivalent or an improved
model and suitable for installation and use on the Airframe without impairing
the value, utility or remaining useful life of the Aircraft; provided that both
Engines shall be of the same make and model) free and clear of all Liens (other
than Permitted Liens, which engine may upon its transfer to Lessor become
subject to any and all Permitted Liens) and having a value, utility and
remaining useful life (without regard to hours or cycles) at least equal to the
Engine subject to such Event of Loss assuming no Event of Loss had occurred and
that such Engine had been maintained in accordance with this Lease. Prior to or
at the time of any such conveyance, Lessee, at its own expense, will (i) furnish
Lessor with a warranty (as to title) bill of sale, in form and substance
reasonably satisfactory to Lessor, with respect to such replacement engine, (ii)
cause a Lease Supplement and Trust Supplement to be duly executed by Lessee and
to be filed for recording pursuant to the Federal Aviation Act, or the
applicable laws, rules and regulations of any other jurisdiction in which the
Airframe may then be registered as permitted by Section 8(f) of the
Participation Agreement, (iii) furnish Lessor with such evidence of compliance
with the insurance provisions of Section 11 hereof with respect to such
replacement engine as Lessor may reasonably request and furnish Lessor with
copies of the documentation required to be provided by Lessee pursuant to
Section 5.06 of the Trust Indenture (whether or not the Trust Indenture is then
in effect), and Lessor will comply with the terms of the Trust Indenture and
transfer to or at the direction of Lessee without recourse or warranty (except
as to absence of Lessor Liens, including for this purpose Liens


                                      -34-
<PAGE>

which would be Lessor Liens but for the proviso in the definition of Lessor
Liens) all of Lessor's right, title and interest, if any, in and to (A) the
Engine with respect to which such Event of Loss occurred and furnish to or at
the direction of Lessee a bill of sale in form and substance reasonably
satisfactory to Lessee, evidencing such transfer and (B) all claims, if any,
against third parties, for damage to or loss of the Engine subject to such Event
of Loss, and such Engine shall thereupon cease to be the Engine leased
hereunder. For all purposes hereof, each such replacement engine shall, after
such conveyance, be deemed part of the property leased hereunder, and shall be
deemed an "Engine". No Event of Loss with respect to an Engine under the
circumstances contemplated by the terms of this paragraph (b) shall result in
any reduction in Basic Rent.

            (c) Application of Payments from Governmental Authorities for
Requisition of Title, etc. Any payments (other than insurance proceeds the
application of which is provided for in Section 11) received at any time by
Lessor or by Lessee from any governmental authority or other Person with respect
to an Event of Loss will be applied as follows:

                  (i) if payments are received with respect to the Airframe (or
            the Airframe and any Engine or engines then installed thereon), (A)
            unless the same are replaced pursuant to the last paragraph of
            Section 10(a), after reimbursement of Lessor (as provided in Section
            7.01 of the Trust Agreement) for reasonable costs and expenses, so
            much of such payments remaining as shall not exceed the Stipulated
            Loss Value required to be paid by Lessee pursuant to Section 10(a),
            shall be applied in reduction of Lessee's obligation to pay
            Stipulated Loss Value, if not already paid by Lessee, or, if already
            paid by Lessee, shall be applied to reimburse Lessee for its payment
            of Stipulated Loss Value, and following the foregoing application,
            the balance, if any, of such payments will be paid over to, or
            retained by Lessee, provided that Lessor shall be entitled to so
            much of the excess, if any, of such payment over the greater of (x)
            the Stipulated Loss Value and (y) the fair market value of the
            Aircraft as Lessor shall demonstrate to Lessee's reasonable
            satisfaction is attributable to compensation for loss of Lessor's
            interest in the Aircraft as distinguished from the loss of use of
            the Aircraft; or (B) if such property is replaced pursuant to the
            last paragraph of Section 10(a), such payments shall be paid over
            to, or retained by, Lessee; provided that Lessee shall have fully
            performed or, concurrently therewith, will fully perform the terms
            of the last paragraph of Section 10(a) with respect to the Event of
            Loss for which such payments are made; and

                  (ii) if such payments are received with respect to an Engine
            under circumstances contemplated by Section 10(b) hereof, so much of
            such payments remaining after reimbursement of Lessor (as provided
            for in Section 7.01 of the Trust Agreement) for reasonable costs and
            expenses shall be paid over to, or retained by, Lessee, provided
            that Lessee shall have fully performed, or concurrently therewith
            will perform, the terms of Section 10(b) with respect to the Event
            of Loss for which such payments are made.

            (d) Requisition for Use of the Aircraft by the United States
Government or the Government of Registry of the Aircraft. In the event of the
requisition for use of the Airframe


                                      -35-
<PAGE>

and the Engines or engines installed on the Airframe during the Term by the
United States Government or any other government of registry of the Aircraft or
any instrumentality or agency of any thereof, Lessee shall promptly notify
Lessor of such requisition, and all of Lessee's obligations under this Lease
Agreement with respect to the Aircraft shall continue to the same extent as if
such requisition had not occurred, provided that if such Airframe and Engines or
engines installed thereon are not returned by such government (or
instrumentality or agency) prior to the end of the Term, Lessee shall be
obligated to return the Airframe and such Engines or engines to Lessor pursuant
to, and in all other respects in compliance with the provisions of, Section 5
promptly on the date of such return by such government (or instrumentality or
agency). If, in the event of any such requisition, Lessee shall fail to return
the Aircraft on or before the thirtieth day beyond the end of the Term, such
failure shall constitute an Event of Loss which shall be deemed to have occurred
on the last day of the Term and in such event Lessee shall make the payment
contemplated by Section 10(a)(i) in respect of such Event of Loss; provided,
however, that Lessor may notify Lessee in writing on or before the twentieth day
prior to the last day of the Term that, in the event Lessee shall fail by reason
of such requisition to return the Airframe and such Engines or engines on or
before the thirtieth day beyond the end of the Term, such failure shall not be
deemed an Event of Loss. Upon the giving of such notice and such failure to
return by the thirtieth day beyond the end of the Term, Lessee shall be relieved
of all of its obligations pursuant to the provisions of Section 5 (including
Exhibit G) but not under any other Section, except that if any engine not owned
by Lessor shall then be installed on the Airframe, Lessee will, at no cost to
Lessor, furnish, or cause to be furnished, to Lessor a full warranty (as to
title) bill of sale with respect to each such engine, in form and substance
reasonably satisfactory to Lessor (together with an opinion of counsel to the
effect that such full warranty bill of sale has been duly authorized and
delivered and is enforceable in accordance with its terms and that such engines
are free and clear of Liens other than Lessor Liens (including for this purpose
Liens which would be Lessor Liens but for the proviso in the definition of
Lessor Liens), Loan Participant Liens and Indenture Trustee's Liens), against
receipt from Lessor of a bill of sale evidencing the transfer, without recourse
or warranty (except as to the absence of Lessor Liens, including for this
purpose Liens which would be Lessor Liens but for the proviso in the definition
of Lessor Liens), by Lessor to Lessee or its designee of all of Lessor's right,
title and interest in and to any Engine constituting part of the Aircraft but
not then installed on the Airframe. All payments received by Lessor or Lessee
from such government (or instrumentality or agency) for the use of such Airframe
and Engines or engines during the Term shall be paid over to, or retained by,
Lessee (or, if directed by Lessee, any Sublessee); and all payments received by
Lessor or Lessee from such government (or instrumentality or agency) for the use
of such Airframe and Engines or engines after the end of the Term shall be paid
over to, or retained by, Lessor unless Lessee shall have exercised its purchase
option hereunder, in which case such payments shall be made to Lessee.

            (e) Requisition for Use of an Engine by the United States Government
or the Government of Registry of the Aircraft. In the event of the requisition
for use of an Engine by the United States Government or any other government of
registry of the Aircraft or any agency or instrumentality of any thereof (other
than in the circumstances contemplated by subsection (d)), Lessee shall replace
such Engine hereunder by complying (or causing any Sublessee to comply) with the
terms of Section 10(b) to the same extent as if an Event of Loss had occurred
with respect thereto, and, upon compliance with Section 10(b) hereof, any
payments received by


                                      -36-
<PAGE>

Lessor or Lessee from such government (or instrumentality or agency) with
respect to such requisition shall be paid over to, or retained by, Lessee.

            (f) Application of Payments During Existence of Event of Default.
Any amount referred to in this Section 10 which is payable to or retainable by
Lessee (or any Sublessee) shall not be paid to or retained by Lessee (or such
Sublessee) if at the time of such payment or retention an Event of Default shall
have occurred and be continuing, but shall be held by or paid over to Lessor as
security for the obligations of Lessee (or such Sublessee) under this Lease and,
if Lessor declares this Lease to be in default pursuant to Section 15 hereof,
applied against Lessee's obligations hereunder as and when due. At such time as
there shall not be continuing any such Event of Default, such amount shall be
paid to Lessee (or such Sublessee) to the extent not previously applied in
accordance with the preceding sentence.

            SECTION 11. Insurance. (a) Public Liability and Property Damage
Insurance. (I) Except as provided in clause (II) of this Section 11(a), Lessee
will carry or cause to be carried at its or any Sublessee's expense (i) aircraft
public liability (including, without limitation, passenger legal liability) (and
including aircraft war risk and hijacking insurance, if and to the extent the
same is maintained by Lessee (or, if a Sublease is then in effect, if and to the
extent maintained by Sublessee) with respect to other aircraft owned or leased,
and operated by Lessee (or such Sublessee) on the same routes) insurance and
property damage insurance (exclusive of manufacturer's product liability
insurance) with respect to the Aircraft, in an amount not less than the greater
of (x) the amount of public liability and property damage insurance from time to
time applicable to aircraft owned or operated by Lessee (or, if a Sublease is
then in effect, by Sublessee) of the same type as the Aircraft and (y) such
amount per occurrence as may have been agreed to on the Delivery Date by the
Owner Participant [amount shall be at least $250,000,000 for A319's and at least
$300,000,000 for A320's] and (ii) cargo liability insurance, in the case of both
clause (i) and clause (ii), (A) of the type and covering the same risks as from
time to time applicable to aircraft operated by Lessee (or, if a Sublease is
then in effect, by Sublessee) of the same type as the Aircraft and (B) which is
maintained in effect with insurers of recognized responsibility. Any policies of
insurance carried in accordance with this paragraph (a) and any policies taken
out in substitution or replacement for any of such policies (A) shall be amended
to name Lessor, in its individual capacity and as owner trustee, the Indenture
Trustee and the Owner Participant (but without imposing on any such parties
liability to pay the premiums for such insurance) (and, if any Sublease shall be
in effect, Lessee in its capacity as sublessor under the Sublease) as additional
insureds as their respective interests may appear, (B) shall provide that in
respect of the respective interests of Lessor, the Indenture Trustee and the
Owner Participant (and, if any Sublease shall be in effect, Lessee in its
capacity as sublessor under the Sublease) in such policies the insurance shall
not be invalidated by any action or inaction of Lessee (or, if any Sublease is
then in effect, any Sublessee) or any other Person and shall insure Lessor, the
Indenture Trustee and the Owner Participant (and, if any Sublease shall be in
effect, Lessee in its capacity as sublessor under the Sublease) regardless of
any breach or violation of any warranty, declaration or condition contained in
such policies by Lessee (or, if any Sublease is then in effect, any Sublessee),
(C) may provide for self-insurance to the extent permitted by Section 11(d) and
(D) shall provide that if the insurers cancel such insurance for any reason
whatever or if any material change is made in such insurance which adversely
affects the interest of Lessor, the Indenture Trustee or the Owner Participant
(or, if any Sublease shall be in effect, Lessee in its capacity as sublessor
under the Sublease), or such


                                      -37-
<PAGE>

insurance shall lapse for non-payment of premium, such cancellation, lapse or
change shall not be effective as to Lessor, the Indenture Trustee or the Owner
Participant (or, if any Sublease shall be in effect, Lessee in its capacity as
sublessor under the Sublease) for thirty (30) days (seven (7) days in the case
of war risk and allied perils coverage) after issuance to Lessor, the Indenture
Trustee or the Owner Participant (or, if any Sublease shall be in effect, Lessee
in its capacity as sublessor under the Sublease), respectively, of written
notice by such insurers of such cancellation, lapse or change; provided,
however, that if any notice period specified above is not reasonably obtainable,
such policies shall provide for as long a period of prior notice as shall then
be reasonably obtainable. Each liability policy (1) shall be primary without
right of contribution from any other insurance which is carried by Lessor, the
Indenture Trustee or the Owner Participant (or, if any Sublease shall be in
effect, Lessee in its capacity as sublessor under the Sublease), (2) shall
expressly provide that all of the provisions thereof, except the limits of
liability, shall operate in the same manner as if there were a separate policy
covering each insured, and (3) shall waive any right of the insurers to any
set-off or counterclaim or any other deduction, whether by attachment or
otherwise, in respect of any liability of Lessor or the Indenture Trustee or the
Owner Participant (or, if any Sublease shall be in effect, Lessee in its
capacity as sublessor under the Sublease) to the extent of any moneys due to
Lessor, the Indenture Trustee or the Owner Participant (or, if any Sublease
shall be in effect, Lessee in its capacity as sublessor under the Sublease).

            (II) During any period that the Aircraft is on the ground and not in
operation, Lessee may carry or cause to be carried, in lieu of the insurance
required by clause (I) above, insurance otherwise conforming with the provisions
of said clause (I) except that (A) the amounts of coverage shall not be required
to exceed the amounts of public liability and property damage insurance from
time to time applicable to aircraft owned or operated by Lessee (or, if a
Sublease is then in effect, by Sublessee) of the same type as the Aircraft which
are on the ground and not in operation; and (B) the scope of the risks covered
and the type of insurance shall be the same as from time to time shall be
applicable to aircraft owned or operated by Lessee (or, if a Sublease is then in
effect, by Sublessee) of the same type which are on the ground and not in
operation.

            (b) Insurance Against Loss or Damage to the Aircraft. (I) Except as
provided in clause (II) of this Section 11(b), Lessee shall maintain or cause to
be maintained in effect, at its or any Sublessee's expense, with insurers of
recognized responsibility, all-risk ground and flight aircraft hull insurance
covering the Aircraft and all-risk ground and flight coverage of Engines and
Parts while temporarily removed from the Aircraft and not replaced by similar
components (including, without limitation, war risk and governmental
confiscation and expropriation (other than by the government of registry of the
Aircraft) and hijacking insurance, if and to the extent the same is maintained
by Lessee (or, if a Sublease is then in effect, by Sublessee) with respect to
other aircraft owned or operated by Lessee (or such Sublessee) on the same
routes, except that Lessee (or such Sublessee) shall maintain war risk and
governmental confiscation and expropriation (other than by the government of
registry of the Aircraft) and hijacking insurance if the Aircraft is operated on
routes where the custom is for major international air carriers flying
comparable routes to carry such insurance) which is of the type as from time to
time applicable to aircraft owned or operated by Lessee (or, if a Sublease is
then in effect, by Sublessee) of the same type as the Aircraft; provided that
such insurance shall at all times while the Aircraft is subject to this Lease be
for an amount (subject to self-insurance to the


                                      -38-
<PAGE>

extent permitted by Section 11(d)) not less than the Stipulated Loss Value for
the Aircraft. Any policies carried in accordance with this paragraph (b)
covering the Aircraft and any policies taken out in substitution or replacement
for any such policies (i) shall name Lessor, as owner trustee, the Indenture
Trustee and the Owner Participant (and, if any Sublease shall be in effect,
Lessee in its capacity as sublessor under the Sublease) as additional insureds,
as their respective interests may appear (but without imposing on any such party
liability to pay premiums with respect to such insurance), (ii) may provide for
self-insurance to the extent permitted in Section 11(d), (iii) shall provide
that (A) in the event of a loss involving proceeds in excess of $5,000,000 (or,
if the Aircraft is then under a Sublease, in excess of $3,000,000), the proceeds
in respect of such loss up to an amount equal to the Stipulated Loss Value for
the Aircraft shall be payable to Lessor (or, so long as the Trust Indenture
shall not have been discharged, the Indenture Trustee) (except in the case of a
loss with respect to an Engine installed on an airframe other than the Airframe,
in which case Lessee (or any Sublessee) shall arrange for any payment of
insurance proceeds in respect of such loss to be held for the account of Lessor
(or, so long as the Trust Indenture shall not have been discharged, the
Indenture Trustee) whether such payment is made to Lessee (or any Sublessee) or
any third party), it being understood and agreed that in the case of any payment
to Lessor (or the Indenture Trustee) otherwise than in respect of an Event of
Loss, Lessor (or the Indenture Trustee) shall, upon receipt of evidence
satisfactory to it that the damage giving rise to such payment shall have been
repaired or that such payment shall then be required to pay for repairs then
being made, pay the amount of such payment to Lessee or its order, and (B) the
entire amount of any loss involving proceeds of $5,000,000 (or, if the Aircraft
is then under a Sublease, of $3,000,000) or less or the amount of any proceeds
of any loss in excess of the Stipulated Loss Value for the Aircraft shall be
paid to Lessee or its order unless an Event of Default shall have occurred and
be continuing and the insurers have been notified thereof by Lessor or the
Indenture Trustee, (iv) shall provide that if the insurers cancel such insurance
for any reason whatever, or such insurance lapses for non-payment of premium or
if any material change is made in the insurance which adversely affects the
interest of Lessor, the Indenture Trustee or the Owner Participant, such
cancellation, lapse or change shall not be effective as to Lessor, the Indenture
Trustee or the Owner Participant (or, if any Sublease shall be in effect, Lessee
in its capacity as sublessor under the Sublease) for thirty (30) days (seven (7)
days in the case of hull war risk and allied perils coverage) after issuance to
Lessor, the Indenture Trustee or the Owner Participant (or, if any Sublease
shall be in effect, Lessee in its capacity as sublessor under the Sublease),
respectively, of written notice by such insurers of such cancellation, lapse or
change, provided, however, that if any notice period specified above is not
reasonably obtainable, such policies shall provide for as long a period of prior
notice as shall then be reasonably obtainable, (v) shall provide that in respect
of the respective interests of Lessor, the Indenture Trustee and the Owner
Participant (and, if any Sublease shall be in effect, Lessee in its capacity as
sublessor under the Sublease) in such policies the insurance shall not be
invalidated by any action or inaction of Lessee (or, if a Sublease is then in
effect, any Sublessee) or any other Person and shall insure the respective
interests of Lessor, the Indenture Trustee and the Owner Participant (and, if
any Sublease shall be in effect, Lessee in its capacity as sublessor under the
Sublease), as they appear, regardless of any breach or violation of any
warranty, declaration or condition contained in such policies by Lessee (or, if
a Sublease is then in effect, any Sublessee), (vi) shall be primary without any
right of contribution from any other insurance which is carried by Lessor, the
Owner Participant or the Indenture Trustee (or, if any Sublease shall be in
effect, Lessee in its capacity as sublessor under the Sublease), (vii) shall
waive any


                                      -39-
<PAGE>

right of subrogation of the insurers against Lessor, the Owner Participant and
the Indenture Trustee (and, if any Sublease shall be in effect, Lessee in its
capacity as sublessor under the Sublease), and (viii) shall waive any right of
the insurers to set-off or counterclaim or any other deduction, whether by
attachment or otherwise, in respect of any liability of Lessor, the Indenture
Trustee, the Owner Participant or Lessee (or any Sublessee) to the extent of any
moneys due to Lessor, the Indenture Trustee or the Owner Participant. In the
case of a loss with respect to an engine (other than an Engine) installed on the
Airframe, Lessor shall hold any payment to it of any insurance proceeds in
respect of such loss for the account of Lessee or any other third party that is
entitled to receive such proceeds.

            As between Lessor and Lessee, it is agreed that all insurance
payments received as the result of the occurrence of an Event of Loss will be
applied as follows:

                  (x) if such payments are received with respect to the Airframe
            (or the Airframe and the Engines installed thereon), (i) unless such
            property is replaced pursuant to the last paragraph of Section
            10(a), so much of such payments remaining, after reimbursement of
            Lessor (as provided in Section 7.01 of the Trust Agreement) for
            reasonable costs and expenses, as shall not exceed the Stipulated
            Loss Value required to be paid by Lessee pursuant to Section 10(a)
            hereof shall be applied in reduction of Lessee's obligation to pay
            such Stipulated Loss Value, if not already paid by Lessee, or, if
            already paid by Lessee, shall be applied to reimburse Lessee for its
            payment of such Stipulated Loss Value, and the balance, if any, of
            such payments remaining thereafter will be paid over to, or retained
            by, Lessee (or if directed by Lessee, any Sublessee); or (ii) if
            such property is replaced pursuant to the last paragraph of Section
            10(a), such payments shall be paid over to, or retained by, Lessee
            (or if directed by Lessee, any Sublessee), provided that Lessee
            shall have fully performed, or concurrently therewith will fully
            perform, the terms of the last paragraph of Section 10(a) with
            respect to the Event of Loss for which such payments are made; and

                  (y) if such payments are received with respect to an Engine
            under the circumstances contemplated by Section 10(b) hereof, so
            much of such payments remaining, after reimbursement of Lessor (as
            provided in Section 7.01 of the Trust Agreement) for reasonable
            costs and expenses, shall be paid over to, or retained by, Lessee
            (or if directed by Lessee, any Sublessee), provided that Lessee
            shall have fully performed, or concurrently therewith will fully
            perform, the terms of Section 10(b) with respect to the Event of
            Loss for which such payments are made.

            As between Lessor and Lessee, the insurance payments for any
property damage loss to the Airframe or any engine not constituting an Event of
Loss with respect thereto will be applied in payment for repairs or for
replacement property in accordance with the terms of Sections 7 and 8, if not
already paid for by Lessee (or any Sublessee), and any balance (or if already
paid for by Lessee (or any Sublessee), all such insurance proceeds) remaining
after compliance with such Sections with respect to such loss shall be paid to
Lessee (or any Sublessee if directed by Lessee).


                                      -40-
<PAGE>

            (II) During any period that the Aircraft is on the ground and not in
operation, Lessee may carry or cause to be carried, in lieu of the insurance
required by clause (I) above, insurance otherwise conforming with the provisions
of said clause (I) except that the scope of the risks and the type of insurance
shall be the same as from time to time applicable to aircraft owned or operated
by Lessee (or, if a Sublease is then in effect, by Sublessee) of the same type
similarly on the ground and not in operation, provided that Lessee shall
maintain insurance against risk of loss or damage to the Aircraft in an amount
equal to the Stipulated Loss Value of the Aircraft during such period that the
Aircraft is on the ground and not in operation.

            (c) Reports, etc. Lessee will furnish, or cause to be furnished, to
Lessor, the Indenture Trustee and the Owner Participant, on or before the
Delivery Date and on or before July 1 in each year thereafter during the Term
commencing July, _____, a report, signed by Aon Risk Services, Inc., Aon Risk
Services of Minnesota, Inc. or any other independent firm of insurance brokers
reasonably acceptable to Lessor (the "Insurance Brokers"), describing in
reasonable detail the insurance and reinsurance then carried and maintained with
respect to the Aircraft and stating the opinion of such firm that the insurance
then carried and maintained with respect to the Aircraft complies with the terms
hereof; provided, however, that all information contained in the foregoing
report shall not be made available by Lessor, the Indenture Trustee, the Loan
Participants or the Owner Participant to anyone except (A) to permitted
transferees of Lessor's, the Loan Participants', the Owner Participant's or the
Indenture Trustee's interest who agree to hold such information confidential,
(B) to Lessor's, the Loan Participants', the Owner Participant's or the
Indenture Trustee's counsel or independent certified public accountants or
independent insurance advisors who agree to hold such information confidential
or (C) as may be required by any statute, court or administrative order or
decree or governmental ruling or regulation. Lessee will cause such Insurance
Brokers to agree to advise Lessor, the Indenture Trustee and the Owner
Participant in writing of any default in the payment of any premium and of any
other act or omission on the part of Lessee of which it has knowledge and which
might invalidate or render unenforceable, in whole or in part, any insurance on
the Aircraft. To the extent such agreement is reasonably obtainable, Lessee will
also cause such Insurance Brokers to agree to advise Lessor, the Indenture
Trustee and the Owner Participant in writing at least thirty (30) days (seven
(7) days in the case of war risk and allied perils coverage), prior to the
expiration or termination date of any insurance carried and maintained on the
Aircraft pursuant to this Section 11. In addition, Lessee will also cause such
Insurance Brokers to deliver to Lessor, the Indenture Trustee and the Owner
Participant, on or prior to the date of expiration of any insurance policy
referenced in a previously delivered certificate of insurance, a new certificate
of insurance, substantially in the same form as delivered by Lessee to such
parties on the Delivery Date. In the event that Lessee or any Sublessee shall
fail to maintain or cause to be maintained insurance as herein provided, Lessor
or the Indenture Trustee may at its sole option provide such insurance and, in
such event, Lessee shall, upon demand, reimburse Lessor or the Indenture
Trustee, as Supplemental Rent, for the cost thereof to Lessor or the Indenture
Trustee, as the case may be, without waiver of any other rights Lessor or the
Indenture Trustee may have; provided, however, that no exercise by Lessor or the
Indenture Trustee, as the case may be, of said option shall affect the
provisions of this Lease, including the provisions of Section 14(g) hereof.

            (d) Self-Insurance. Lessee may self-insure by way of deductible,
premium adjustment or franchise provisions or otherwise (including, with respect
to insurance maintained


                                      -41-
<PAGE>

pursuant to Section 11(b), insuring for a maximum amount which is less than the
Stipulated Loss Value of the Aircraft) in the insurance covering the risks
required to be insured against pursuant to this Section 11 under a program
applicable to all aircraft in Lessee's fleet, but in no case shall the aggregate
amount of self-insurance in regard to Section 11(a) and Section 11(b) exceed
during any policy year, with respect to all of the aircraft in Lessee's fleet
(including, without limitation, the Aircraft), the lesser of (a) 50% of the
largest replacement value of any single aircraft in Lessee's fleet or (b) 1-1/2%
of the average aggregate insurable value (during the preceding policy year) of
all aircraft (including, without limitation, the Aircraft) on which Lessee
carries insurance. In addition, Lessee (and any Sublessee) may self-insure to
the extent of any applicable mandatory minimum per aircraft (or, if applicable,
per annum or other period) hull or liability insurance deductible imposed by the
aircraft hull or liability insurers.

            (e) Additional Insurance by Lessor and Lessee. Lessee (and any
Sublessee) may at its own expense carry insurance with respect to its interest
in the Aircraft in amounts in excess of that required to be maintained by this
Section 11; the Owner Participant either directly or through Lessor may carry
for its own account at its sole cost and expense insurance with respect to its
interest in the Aircraft, provided that such insurance does not prevent Lessee
(or any Sublessee) from carrying the insurance required or permitted by this
Section 11 or adversely affect such insurance or the cost thereof.

            (f) Indemnification by Government in Lieu of Insurance.
Notwithstanding any provisions of this Section 11 requiring insurance, Lessor
agrees to accept, in lieu of insurance against any risk with respect to the
Aircraft, indemnification from, or insurance provided by, the United States
Government or any agency or instrumentality thereof or, upon the written consent
of Lessor, other government of registry of the Aircraft or any agency or
instrumentality thereof, against such risk in an amount which, when added to the
amount of insurance against such risk maintained by Lessee (or any Sublessee)
with respect to the Aircraft (including permitted self-insurance) shall be at
least equal to the amount of insurance against such risk otherwise required by
this Section 11.

            (g) Application of Payments During Existence of an Event of Default.
Any amount referred to in paragraph (b) of this Section 11 which is payable to
or retainable by Lessee (or any Sublessee) shall not be paid to or retained by
Lessee (or any Sublessee) if at the time of such payment or retention an Event
of Default shall have occurred and be continuing, but shall be held by or paid
over to Lessor as security for the obligations of Lessee (or any Sublessee)
under this Lease and, if Lessor declares this Lease to be in default pursuant to
Section 15 hereof, applied against Lessee's obligations hereunder as and when
due. At such time as there shall not be continuing any such Event of Default,
such amount shall be paid to Lessee (or such Sublessee) to the extent not
previously applied in accordance with the preceding sentence.

            SECTION 12. Inspection. At all reasonable times and upon at least 15
days' prior written notice to Lessee, Lessor, the Owner Participant or the
Indenture Trustee or their respective authorized representatives may (not more
than once every calendar year (unless an Event of Default has occurred and is
continuing when such inspection right shall not be so limited)) inspect the
Aircraft and inspect and make copies (at Lessor's, the Owner Participant's or
the Indenture Trustee's expense, as the case may be) of the books and records of
Lessee relating to the maintenance of the Aircraft; any such inspection of the
Aircraft shall be limited to


                                      -42-
<PAGE>

a visual, walk-around inspection and shall not include opening any panels, bays
or the like without the express consent of Lessee; provided that no exercise of
such inspection right shall interfere with the operation or maintenance of the
Aircraft by, or the business of, Lessee (or any Sublessee). Upon receipt by
Lessee of a written request from the Owner Participant specifying that the Owner
Participant desires to have an authorized representative observe the next
scheduled major overhaul to be performed on the Aircraft, Lessee shall cooperate
with the Owner Participant to enable the Owner Participant's authorized
representative to observe the next scheduled major overhaul to be performed on
the Aircraft; provided that Lessee shall be required to so cooperate only to the
extent necessary to enable the Owner Participant's authorized representative to
observe (i) one scheduled major overhaul during each three year period of the
Term and (ii) (notwithstanding the foregoing clause (i) but only if a major
overhaul is scheduled during the last year of the Term) one scheduled major
overhaul during the last year of the Term; provided, further that the Owner
Participant's authorized representative shall merely observe such major
overhaul, shall not interfere with or extend in any manner the conduct or
duration of the major overhaul and shall not be entitled to direct any of the
work performed in connection with such overhaul. None of Lessor, the Owner
Participant or the Indenture Trustee shall have any duty to make any such
inspection nor shall any of them incur any liability or obligation by reason of
not making such inspection.

            SECTION 13. Assignment. Except as otherwise provided herein, Lessee
will not, without prior written consent of Lessor, assign in whole or in part
any of its rights or obligations hereunder. Lessor agrees that it will not
assign or convey its right, title and interest in and to this Lease or the
Aircraft except as provided herein, in the Trust Agreement or in the
Participation Agreement. Subject to the foregoing, the terms and provisions of
this Lease shall be binding upon and inure to the benefit of Lessor and Lessee
and their respective successors and permitted assigns.

            SECTION 14. Events of Default. Each of the following events shall
constitute an Event of Default (whether any such event shall be voluntary or
involuntary or come about or be effected by operation of law or pursuant to or
in compliance with any judgment, decree or order of any court or any order, rule
or regulation of any administrative or governmental body) and each such Event of
Default shall continue so long as, but only as long as, it shall not have been
remedied:

            (a) Lessee shall not have made a payment of Basic Rent or Stipulated
      Loss Value within ten (10) Business Days after the same shall have become
      due; or

            (b) Lessee shall have failed to make a payment of Supplemental Rent
      (other than Stipulated Loss Value) after the same shall have become due
      and such failure shall continue for ten (10) Business Days after Lessee's
      receipt of written demand therefor by the party entitled thereto (provided
      that any failure to pay any amount owed by Lessee under the Tax Indemnity
      Agreement or any failure of Lessee to pay to Lessor or the Owner
      Participant when due any Excluded Payments (as defined in the Trust
      Indenture) shall not constitute an Event of Default unless notice is given
      by the Owner Participant to Lessee and the Indenture Trustee that such
      failure shall constitute an Event of Default); or


                                      -43-
<PAGE>

            (c) Lessee shall have failed to perform or observe (or caused to be
      performed and observed), in any material respect, any covenant or
      agreement (except the covenants set forth in the Tax Indemnity Agreement
      and in clauses (i)(B) and (ii) of the first sentence of second paragraph
      of Exhibit G) to be performed or observed by it under any Operative
      Document, and such failure shall continue unremedied for a period of
      thirty (30) days after receipt by Lessee of written notice thereof from
      Lessor or the Indenture Trustee; provided, however, that if Lessee shall
      have undertaken to cure any such failure which arises under clause (ii) or
      clause (iii) of the first sentence of Section 7(a), or under the second
      sentence of Section 7(a) as it relates to maintenance, service, repair or
      overhaul or under Section 8 and, notwithstanding the diligence of Lessee
      in attempting to cure such failure, such failure is not cured within said
      thirty day period but is curable with future due diligence, there shall
      exist no Event of Default under this Section 14 so long as Lessee is
      proceeding with due diligence to cure such failure and such failure is
      remedied not later than three hundred sixty-five (365) days after receipt
      by Lessee of such written notice; or

            (d) any representation or warranty made by Lessee herein or in the
      Participation Agreement or any document or certificate furnished by Lessee
      in connection herewith or therewith or pursuant hereto or thereto (except
      the representations and warranties set forth in Section 3 of the Tax
      Indemnity Agreement and such documents or certificates as are furnished to
      the Owner Participant solely in connection with matters dealt with in the
      Tax Indemnity Agreement and for no other purpose and except for
      representations or warranties contained in the Pass Through Trust
      Agreement, the Underwriting Agreement or the Note Purchase Agreement or
      any document or instrument furnished pursuant to any thereof) shall prove
      to have been incorrect in any material respect at the time made and such
      incorrectness shall not have been cured (to the extent of the adverse
      impact of such incorrectness on the interests of the Owner Participant,
      Lessor or the Certificate Holders) within thirty (30) days after the
      receipt by Lessee of a written notice from Lessor or the Indenture Trustee
      advising Lessee of the existence of such incorrectness; or

            (e) the commencement of an involuntary case or other proceeding in
      respect of Lessee in an involuntary case under the federal bankruptcy
      laws, as now or hereafter constituted, or any other applicable federal or
      state bankruptcy, insolvency or other similar law in the United States or
      seeking the appointment of a receiver, liquidator, assignee, custodian,
      trustee, sequestrator (or similar official) of Lessee or for all or
      substantially all of its property, or seeking the winding-up or
      liquidation of its affairs and the continuation of any such case or other
      proceeding undismissed and unstayed for a period of ninety (90)
      consecutive days or an order, judgment or decree shall be entered in any
      proceeding by any court of competent jurisdiction appointing, without the
      consent of Lessee, a receiver, trustee or liquidator of Lessee, or of any
      substantial part of its property, or sequestering any substantial part of
      the property of Lessee and any such order, judgment or decree or
      appointment or sequestration shall be final or shall remain in force
      undismissed, unstayed or unvacated for a period of ninety (90) days after
      the date of entry thereof; or


                                      -44-
<PAGE>

            (f) the commencement by Lessee of a voluntary case under the federal
      bankruptcy laws, as now constituted or hereafter amended, or any other
      applicable federal or state bankruptcy, insolvency or other similar law in
      the United States, or the consent by Lessee to the appointment of or
      taking possession by a receiver, liquidator, assignee, trustee, custodian,
      sequestrator (or other similar official) of Lessee or for all or
      substantially all of its property, or the making by Lessee of any
      assignment for the benefit of creditors, or Lessee shall take any
      corporate action to authorize any of the foregoing; or

            (g) Lessee shall fail to carry and maintain on or with respect to
      the Aircraft (or cause to be carried and maintained) insurance required to
      be maintained in accordance with the provisions of Section 11 hereof;

provided, however, that, notwithstanding anything to the contrary contained in
this Section 14, any failure of Lessee to perform or observe any covenant,
condition, agreement or any error in a representation or warranty shall not
constitute an Event of Default if such failure or error is caused solely by
reason of an event that constitutes an Event of Loss so long as Lessee is
continuing to comply with all of the terms of Section 10 hereof.

            SECTION 15. Remedies. Upon the occurrence of any Event of Default
and at any time thereafter so long as the same shall be continuing, Lessor may,
at its option, declare by written notice to Lessee this Lease Agreement to be in
default, provided, that, if an Event of Default referred to in Section 14(e) or
14(f) shall have occurred, this Lease Agreement shall be deemed to be declared
in default without further act; and at any time thereafter, so long as any such
outstanding Events of Default shall not have been remedied, Lessor may do one or
more of the following with respect to all or any part of the Airframe and any or
all of the Engines as Lessor in its sole discretion shall elect, to the extent
permitted by, and subject to compliance with any mandatory requirements of,
applicable law then in effect; provided, however, that during any period the
Aircraft is subject to the Civil Reserve Air Fleet Program in accordance with
the provisions of Section 7(b) hereof and in possession of the United States
government or an agency or instrumentality of the United States, Lessor shall
not, on account of any Event of Default, be entitled to do any of the following
in such manner as to limit Lessee's control under this Lease (or any Sublessee's
control under any Sublease) of any Airframe or any Engines installed thereon,
unless at least sixty (60) days' (or such lesser period as may then be
applicable under the Air Mobility Command program of the United States
Government) written notice of default hereunder shall have been given by Lessor
by registered or certified mail to Lessee (and any Sublessee) with a copy
addressed to the Contracting Office Representative for the Air Mobility Command
of the United States Air Force under any contract with Lessee (or any Sublessee)
relating to the Aircraft:

            (a) upon the written demand of Lessor and at Lessee's expense, cause
      Lessee to return promptly, and Lessee shall return promptly, the Airframe
      or any Engine as Lessor may so demand to Lessor or its order in the manner
      and condition required by, and otherwise in accordance with all the
      provisions of, Section 5 as if such Airframe or Engine were being returned
      at the end of the Term, or Lessor, at its option, may enter upon the
      premises where all or any part of the Airframe or any Engine is located
      and take immediate possession of and remove the same by summary
      proceedings or otherwise


                                      -45-
<PAGE>

      (and/or, at Lessor's option, store the same at Lessee's premises until
      disposal thereof by Lessor), all without liability accruing to Lessor for
      or by reason of such entry or taking of possession or removing whether for
      the restoration of damage to property caused by such action or otherwise;

            (b) sell the Airframe and/or any Engine at public or private sale,
      as Lessor may determine, or otherwise dispose of, hold, use, operate,
      lease to others or keep idle the Aircraft as Lessor, in its sole
      discretion, may determine, all free and clear of any rights of Lessee,
      except as hereinafter set forth in this Section 15;

            (c) whether or not Lessor shall have exercised, or shall thereafter
      at any time exercise, any of its rights under paragraph (a) or paragraph
      (b) above with respect to the Airframe and/or any Engine, Lessor, by
      written notice to Lessee specifying a payment date which shall be the
      Lease Period Date not earlier than ten days from the date of such notice,
      may demand that Lessee pay to Lessor, and Lessee shall pay Lessor, on the
      payment date so specified, as liquidated damages for loss of a bargain and
      not as a penalty (in lieu of the installments of Basic Rent for the
      Aircraft due for Lease Periods commencing on or after the Delivery Date or
      the Lease Period Date specified as the payment date in such notice), any
      unpaid Basic Rent due on Lease Period Dates prior to the payment date so
      specified and, if any Basic Rent is payable in arrears on such payment
      date as indicated on Exhibit B, any Basic Rent payable on such payment
      date (including, in each case, without limitation, any adjustments to
      Basic Rent payable pursuant to Section 3(d)) plus whichever of the
      following amounts Lessor, in its sole discretion, shall specify in such
      notice (together with interest, if any, on such amount at the Past Due
      Rate from such specified payment date until the date of actual payment of
      such amount): (i) an amount equal to the excess, if any, of the Stipulated
      Loss Value for the Aircraft, computed as of the Lease Period Date
      specified as the payment date in such notice, over the aggregate fair
      market rental value (computed as hereafter in this Section 15 provided) of
      such Aircraft for the remainder of the Term, after discounting such
      aggregate fair market rental value to present value as of the Lease Period
      Date specified as the payment date in such notice at an annual rate equal
      to the Base Rate plus 1%; or (ii) an amount equal to the excess, if any,
      of the Stipulated Loss Value for such Aircraft, computed as of the Lease
      Period Date specified as the payment date in such notice over the fair
      market sales value of such Aircraft (computed as hereafter in this Section
      provided) as of the Lease Period Date specified as the payment date in
      such notice;

            (d) in the event Lessor, pursuant to paragraph (b) above, shall have
      sold the Airframe and/or any Engine, Lessor, in lieu of exercising its
      rights under paragraph (c) above with respect to such Aircraft, may, if it
      shall so elect, demand that Lessee pay Lessor, and Lessee shall pay to
      Lessor, on the date of such sale, as liquidated damages for loss of a
      bargain and not as a penalty (in lieu of the installments of Basic Rent
      for the Aircraft due on or after such date), any unpaid Basic Rent with
      respect to the Aircraft due prior to such date (including, in each case,
      without limitation, any adjustments to Basic Rent payable pursuant to
      Section 3(d)) plus the amount of any deficiency between the net proceeds
      of such sale (after deduction of all reasonable costs of sale) and the
      Stipulated Loss Value of such Aircraft, computed as of the Stipulated Loss
      Value Date on or immediately preceding the date of such sale together with
      interest, if any, on the amount


                                      -46-
<PAGE>

      of such deficiency, at the Past Due Rate, from the date of such sale to
      the date of actual payment of such amount; and/or

            (e) Lessor may rescind, terminate or cancel this Lease Agreement as
      to the Aircraft, and/or may exercise any other right or remedy which may
      be available to it under applicable law or proceed by appropriate court
      action to enforce the terms hereof or to recover damages for breach
      hereof.

            For the purposes of paragraph (c) above, the "fair market rental
value" or the "fair market sales value" of the Aircraft shall be the rental
value or sales value, as the case may be, which would be obtained in an
arm's-length transaction between an informed and willing lessee or purchaser, as
the case may be, under no compulsion to lease or purchase, as the case may be,
and an informed and willing lessor or seller in possession under no compulsion
to sell, as the case may be, in each case based upon the actual condition and
location of the Aircraft, which value shall be determined by mutual agreement
or, in the absence of mutual written agreement, pursuant to an appraisal
prepared and delivered by a nationally recognized firm of independent aircraft
appraisers nominated by Lessor, and Lessor shall immediately notify Lessee of
such nomination. Unless Lessee shall have objected in writing within ten days
after its receipt of Lessor's notice, Lessor's nomination shall be conclusive
and binding. If Lessee shall object, however, Lessor and Lessee shall endeavor,
within ten days after such objection is made, to select a mutually acceptable
appraiser; provided that, if Lessee shall not so endeavor to make such
selection, Lessor's nomination referred to in the preceding sentence hereof
shall be conclusive and binding. If Lessor and Lessee fail to reach agreement
(except for the reason referred to in the proviso in the preceding sentence), or
if any appraiser selected fails to act for any reason, then the question shall
be determined by an appraisal (applying the definitions of "fair market rental
value" and "fair market sales value" as set forth above based upon the actual
condition of the Aircraft) mutually agreed to by two recognized independent
aircraft appraisers, one of which appraisers shall be chosen by Lessor and one
by Lessee within five Business Days after Lessor or Lessee shall have received
written notice from the other party of a demand that such an appraisal be made,
which notice shall specify the appraiser chosen by the party giving the notice
or, if such appraisers cannot agree on the amount of such appraisal within
twenty Business Days after the end of such five-day period, each shall render
its own appraisal and shall by mutual consent choose another appraiser within
five Business Days after the end of such twenty-day period. If, within such
five-day period, such two appraisers fail to appoint a third appraiser, then
either Lessor or Lessee, on behalf of both, may request such appointment by the
then President of the Association of the Bar of the City of New York (or any
successor organization thereto) or, in his absence, failure, refusal or
inability to act, then either Lessor or Lessee may apply to the American
Arbitration Association (or any successor organization thereto) in New York, New
York for the appointment of such third appraiser. The decision of the third
appraiser so appointed shall be given within twenty Business Days after the
appointment of such third appraiser. As soon as the third appraiser has
delivered his appraisal, that appraisal shall be compared with the appraisals
given by the other two appraisers. If the determination of one appraiser is more
disparate from the average of all three determinations than each of the other
two determinations, then the determination of such appraiser shall be excluded,
the remaining two determinations shall be averaged and such average shall be
final and binding upon the parties hereto. If no determination is more disparate
from the average of all three determinations than each of the other
determinations, then such average shall be final


                                      -47-
<PAGE>

and binding upon the parties thereto. The cost of such appraisal or appointment
shall be borne by Lessee.

            In addition, Lessee shall be liable, except as otherwise provided
above and without duplication of amounts payable hereunder, for any and all
unpaid Rent due hereunder before, after or during the exercise of any of the
foregoing remedies and for all reasonable legal fees and other costs and
expenses (including fees of the appraisers hereinabove referred to) incurred by
Lessor, the Indenture Trustee, the Loan Participants and the Owner Participant
in connection with the return of the Airframe or any Engine in accordance with
the terms of Section 5 or in placing such Airframe or Engine in the condition
and airworthiness required by such Section.

            At any sale of the Aircraft or any part thereof pursuant to this
Section 15, Lessor (or the Indenture Trustee, any Loan Participant or the Owner
Participant) or Lessee may bid for and purchase such property. Lessor agrees to
give Lessee at least fifteen (15) days' prior written notice of the date fixed
for any public sale of the Airframe or any Engine or of the date on or after
which will occur the execution of any contract providing for any private sale
and any such public sale shall be conducted in general so as to afford Lessee
(and any Sublessee) a reasonable opportunity to bid. Except as otherwise
expressly provided above, no remedy referred to in this Section 15 is intended
to be exclusive, but each shall be cumulative and in addition to any other
remedy referred to above or otherwise available to Lessor at law or in equity;
and the exercise or beginning of exercise by Lessor of any one or more of such
remedies shall not preclude the simultaneous or later exercise by Lessor of any
or all of such other remedies. No waiver by Lessor of any Event of Default shall
in any way be, or be construed to be, a waiver of any future or subsequent Event
of Default.

            SECTION 16. Lessee's Cooperation Concerning Certain Matters.
Forthwith upon the execution and delivery of each Lease Supplement and Trust
Supplement from time to time required by the terms hereof and upon the execution
and delivery of any amendment to this Lease, to the Trust Indenture or to the
Trust Agreement, Lessee will cause such Lease Supplement, Trust Supplement (and,
in the case of the initial Lease Supplement and Trust Supplement, this Lease,
the Trust Agreement and the Trust Indenture as well) or amendment to be duly
filed and recorded, and maintained of record, in accordance with the applicable
laws of the government of registry of the Aircraft. In addition, Lessee will
promptly and duly execute and deliver to Lessor such further documents and take
such further action as Lessor or the Indenture Trustee may from time to time
reasonably request in order more effectively to carry out the intent and purpose
of this Lease and to establish and protect the rights and remedies created or
intended to be created in favor of Lessor and the Indenture Trustee hereunder,
including, without limitation, if requested by Lessor or the Indenture Trustee,
at the expense of Lessee, the execution and delivery of supplements or
amendments hereto or to the Trust Indenture, each in recordable form, subjecting
to this Lease and the Trust Indenture, any airframe or engine substituted for
the Airframe or any Engine pursuant to the terms thereof and the recording or
filing of counterparts thereof, in accordance with the laws of such
jurisdictions as Lessor or the Indenture Trustee may from time to time deem
advisable. Lessee agrees to furnish to Lessor and the Indenture Trustee promptly
after execution and delivery of any supplement and amendment hereto and promptly
after the execution and delivery of any supplement and amendment to the Trust
Indenture (except for any such supplement or amendment which does


                                      -48-
<PAGE>

not require or receive the approval of Lessee pursuant to the Operative
Documents and is not required pursuant to the terms of the Operative Documents),
an opinion of counsel reasonably satisfactory to Lessor and the Indenture
Trustee as to the due recording or filing of such supplement or amendment.
Commencing in ____, on or before April 30 of each year during the Term, Lessee
will deliver to Lessor and the Indenture Trustee a certificate of Lessee, signed
by the President, a Vice President, the Treasurer or the Chief Financial Officer
of Lessee to the effect that the signer is familiar with or has reviewed the
relevant terms of this Lease and the signer does not have actual knowledge of
the existence, as of the date of such certificate, of any condition or event
which constitutes a Default or an Event of Default. Lessee agrees that if the
Chief Executive Officer, Chief Operating Officer, Chief Financial Officer,
Treasurer or an Assistant Treasurer of Lessee has actual knowledge of the
existence of a Default, then Lessee shall promptly give to Lessor, the Owner
Participant and the Indenture Trustee notice thereof and such other information
relating thereto as Lessor, the Owner Participant or the Indenture Trustee may
reasonably request. Lessee agrees that if an officer of Lessee has knowledge of
the existence of an Event of Default, Lessee shall promptly give to Lessor and
the Indenture Trustee notice thereof and such other information relating thereto
as Lessor or the Indenture Trustee may reasonably request. Lessee will deliver
to Lessor, the Owner Participant and the Indenture Trustee (i) within sixty (60)
days after the end of each of the first three quarterly periods of each fiscal
year of the Guarantor, the publicly filed Form 10Q report of the Guarantor; and
(ii) within one hundred twenty (120) days after the close of such fiscal year,
the publicly filed annual report and Form 10K report of the Guarantor.

            SECTION 17. Notices. All notices required under the terms and
provisions hereof shall be by telecopier or other telecommunication means (with
such telecopy or other telecommunication means to be confirmed in writing), or
if such notice is impracticable, by registered, first-class airmail, with
postage prepaid, or by personal delivery of written notice and any such notice
shall become effective when received, addressed:

                  (i) if to Lessee, for U.S. mail at 5101 Northwest Drive
            (A4010), St. Paul, Minnesota 55111-3034, and for overnight courier
            at 2700 Lone Oak Parkway (A4010), Eagan, Minnesota 55121, Attention:
            Treasurer (Telecopy No. (612) 726-0665), or to such other address or
            telecopy number as Lessee shall from time to time designate in
            writing to Lessor,

                  (ii) if to Lessor, at 79 South Main Street, Salt Lake City,
            Utah 84111, Attention: Corporate Trust Department (Telecopy No.
            (801) 246-5053), or to such other address or telecopy number as
            Lessor shall from time to time designate in writing to Lessee, and

                  (iii) if to a Loan Participant, the Indenture Trustee or the
            Owner Participant, addressed to such Loan Participant, the Indenture
            Trustee or the Owner Participant at such address or telecopy number
            as such Loan Participant, the Indenture Trustee or the Owner
            Participant shall have furnished by notice to Lessor and to Lessee,
            and, until an address is so furnished, addressed to such Loan
            Participant, the Indenture Trustee or the Owner Participant at its
            address or telecopy number set forth in Schedule I to the
            Participation Agreement.


                                      -49-
<PAGE>

            SECTION 18. No Set-Off, Counterclaim, etc. All Rent shall be paid by
Lessee to Lessor in funds of the type specified in Section 3(f). Lessee's
obligation to pay all Rent payable hereunder shall be absolute and unconditional
and shall not be affected by any circumstance, including, without limitation,
(i) any set-off, counterclaim, recoupment, defense or other right which Lessee
may have against Lessor, in its individual capacity or as Owner Trustee under
the Trust Agreement, the Indenture Trustee (in its individual capacity or as
Indenture Trustee), any Loan Participant, the Owner Participant, or anyone else
for any reason whatsoever (whether in connection with the transactions
contemplated hereby or any other transactions), including, without limitation,
any breach by Lessor or the Owner Participant of their respective warranties,
agreements or covenants contained in any of the Operative Documents, (ii) any
defect in the title, registration, airworthiness, condition, design, operation,
or fitness for use of, or any damage to or loss or destruction of, the Aircraft,
or any interruption or cessation in or prohibition of the use or possession
thereof by Lessee (or any Sublessee) for any reason whatsoever, including,
without limitation, any such interruption, cessation or prohibition resulting
from the act of any government authority, (iii) any insolvency, bankruptcy,
reorganization or similar case or proceedings by or against Lessee (or any
Sublessee) or any other person, or (iv) any other circumstance, happening, or
event whatsoever, whether or not unforeseen or similar to any of the foregoing.
If for any reason whatsoever this Lease shall be terminated in whole or in part
by operation of law or otherwise except as specifically provided herein, Lessee
nonetheless agrees without limitation of the other rights or remedies of Lessor
hereunder to pay to Lessor an amount equal to each Rent payment at the time such
payment would have become due and payable in accordance with the terms hereof
had this Lease not been terminated in whole or in part. Lessee hereby waives, to
the extent permitted by applicable law, any and all rights which it may now have
or which at any time hereafter may be conferred upon it, by statute or
otherwise, to terminate, cancel, quit or surrender this Lease except in
accordance with the express terms hereof.

            SECTION 19. Renewal Options; Purchase Options; Valuation. (a)
Renewal Options. (1) Fixed Renewal Term. Lessee shall have the right to renew
this Lease for a one year renewal term which shall commence only upon the
expiration of the Basic Term (the "first Fixed Renewal Term"), a one year
renewal term which shall commence only upon the expiration of the first Fixed
Renewal Term (the "second Fixed Renewal Term"), and a one year renewal term
which shall commence only upon the expiration of the second Fixed Renewal Term
(the "third Fixed Renewal Term") (the first Fixed Renewal Term, the second Fixed
Renewal Term and the third Fixed Renewal Term, each a "Fixed Renewal Term") by
delivery to Lessor at least ninety (90) days before the end of the Basic Term,
the first Fixed Renewal Term or the second Fixed Renewal Term, as the case may
be, of a written notice irrevocably electing to renew this Lease for a Fixed
Renewal Term. Basic Rent during any Fixed Renewal Term shall be payable in an
amount and at the times specified in Section 19(a)(4).

            (2) Fair Market Renewal Term. At the expiration of the third Fixed
Renewal Term or any Fair Market Renewal Term, Lessee shall have the right to
renew this Lease by delivery to Lessor of a written notice irrevocably electing
to renew this Lease for a renewal term of not less than one year and not more
than three years for a Basic Rent equal to the "fair market rental value" of the
Aircraft for such period (any such renewal term, a "Fair Market Renewal Term").
Each such right to renew may be exercised by Lessee delivering to Lessor, at
least ninety (90) days prior to the commencement of such Fair Market Renewal
Term, a written notice


                                      -50-
<PAGE>

irrevocably electing to renew this Lease for a Fair Market Renewal Term (which
notice shall also specify the length of the Fair Market Renewal Term).

            (3) If no written notice is delivered by Lessee to Lessor pursuant
to Section 19(a)(1) or 19(a)(2) on or before the day specified therefor, Lessee
shall be deemed to have waived any right to renew this Lease.

            (4) At the end of the Basic Term or any Renewal Term, if Lessee has
elected to renew this Lease as aforesaid, and provided that there shall not then
have occurred and be continuing a Default of the type referred to in Section
14(a), 14(b) or 14(e) or an Event of Default and that all necessary governmental
authorizations and approvals shall have been received and that Basic Rent for
the Renewal Term has already been determined as above provided and a Lease
Supplement evidencing such renewal has been executed and filed for recordation
with the Federal Aviation Administration, this Lease shall continue in full
force and effect during the Renewal Term, except that (x) Lessee shall pay
Lessor Basic Rent for the Aircraft during the Renewal Term in an amount equal to
the "fair market rental value" thereof determined in accordance with Section
19(c), each semi-annual installment of Basic Rent not to exceed in the case of a
Fixed Renewal Term 50% of the average Basic Rent during the Basic Term (such
average being determined as the total of all payments of Basic Rent during the
Basic Term added together and divided by the number of payments of Basic Rent
during the Basic Term), which Basic Rent shall be payable in semi-annual
installments in arrears, each such installment being due and payable on each
Lease Period Date occurring during the Renewal Term, commencing with the Lease
Period Date immediately following the commencement of the Renewal Term, and (y)
the Stipulated Loss Values applicable during the Renewal Term shall be
determined separately for each Renewal Term by the Owner Participant in good
faith to reflect Stipulated Loss Values determined in accordance with the
following sentence. Stipulated Loss Values during a Renewal Term shall on the
date on which such Renewal Term begins be equal to the fair market sales value
of the Aircraft as of such date, determined in accordance with the provisions of
this Section 19(a)(4) and Section 19(c) hereof, and shall decline ratably on a
monthly basis to the fair market sales value of the Aircraft as of the last day
of such Renewal Term, determined in accordance with the provisions of this
Section 19(a)(4) and Section 19(c) hereof.

            In determining fair market sales value for purposes of calculating
Stipulated Loss Value for any Renewal Term effect shall be given to the
encumbrance on the Aircraft of any Renewal Term available or in force under this
Section 19.

            (b) Purchase Options. Lessee shall have the option, upon at least
ninety (90) days' irrevocable prior written notice to Lessor, to purchase the
Aircraft on the last Business Day of the Basic Term or any Renewal Term for a
purchase price equal to the lesser of (x) the fair market sales value of the
Aircraft or (y) 50% of Lessor's Cost. Upon payment to Lessor in immediately
available funds of the full amount of the purchase price and payment of any
other amounts then due hereunder (including all Rent and all costs or expenses
of the Owner Participant in connection with such purchase), Lessor will transfer
to Lessee, without recourse or warranty (except as to the absence of Lessor
Liens, including for this purpose Liens which would be Lessor Liens but for the
proviso in the definition of Lessor Liens), all of Lessor's right, title and
interest in and to the Aircraft.


                                      -51-
<PAGE>

            (c) Valuation. At any time not earlier than three hundred sixty-five
(365) days prior to the date on which Lessee may purchase the Aircraft pursuant
to Section 19(b) hereof or renew this Lease pursuant to Section 19(a)(1) or
Section 19(a)(2) hereof, Lessee may deliver to Lessor a revocable notice of its
intent to exercise its renewal option or purchase option. For all purposes of
this Section 19, including the appraisal referred to in this Section 19(c), in
determining "fair market rental value" or "fair market sales value", the
Aircraft shall be valued (i) as if in the condition and otherwise in compliance
with the terms of Section 5 upon a return of the Aircraft to the United States
and as if it had been maintained at all times as required in accordance with
Section 7(a)(I) during periods when no Sublease was in effect, (ii) on the basis
of the value which would obtain in an arm's-length transaction between an
informed and willing buyer-user or lessee (other than a lessee or an Affiliate
of a lessee currently in possession or a used equipment scrap dealer) under no
compulsion to buy or lease and an informed and willing seller or lessor
unaffiliated with such buyer-user or lessee and under no compulsion to sell or
lease and disregarding the purchase and renewal options of the lessee provided
in this Lease, and (iii) in the case of such valuation for determining "fair
market rental value", assuming such lessee would have substantially the same
obligations during the Renewal Term as provided hereunder including without
limitation the obligations of Lessee to carry and maintain the insurance
required by Section 11 hereof and to make certain payments with reference to
Stipulated Loss Value during the applicable Renewal Term. Upon receipt of such
notice Lessor and Lessee shall confer in good faith with a view to reaching
agreement on the "fair market rental value" or "fair market sales value" of the
Aircraft. If the parties have not so agreed by two hundred seventy (270) days
prior to the end of the Basic Term or the Renewal Term in question, then the
question shall be determined by an appraisal mutually agreed to by two
recognized independent aircraft appraisers, one of which appraisers shall be
chosen by Lessor and one by Lessee within five Business Days after Lessor or
Lessee shall have received written notice from the other party of a demand that
such an appraisal be made, which notice shall specify the appraiser chosen by
the party giving the notice or, if such appraisers cannot agree on the amount of
such appraisal within twenty Business Days after the end of such five-day
period, each shall render its own appraisal and shall by mutual consent choose
another appraiser within five Business Days after the end of such twenty-day
period. If, within such five-day period, such two appraisers fail to appoint a
third appraiser, then either Lessor or Lessee, on behalf of both, may request
such appointment by the then President of the Association of the Bar of the City
of New York (or any successor organization thereto) or, in his absence, failure,
refusal or inability to act, then either Lessor or Lessee may apply to the
American Arbitration Association (or any successor organization thereto) in New
York, New York for the appointment of such third appraiser. The decision of the
third appraiser so appointed shall be given within twenty Business Days after
the appointment of such third appraiser. As soon as the third appraiser has
delivered his appraisal, that appraisal shall be compared with the appraisals
given by the other two appraisers. If the determination of one appraiser is more
disparate from the average of all three determinations than each of the other
two determinations, then the determination of such appraiser shall be excluded,
the remaining two determinations shall be averaged and such average shall be
final and binding upon the parties hereto. If no determination is more disparate
from the average of all three determinations than each of the other
determinations, then such average shall be final and binding upon the parties
thereto. Lessee and Lessor shall share equally all expenses relating to such
appraisal procedure provided if Lessee elects not to renew this


                                      -52-
<PAGE>

Lease or purchase the Aircraft following such appraisal, Lessee shall pay all
expenses of such appraisal.

            (d) Special Purchase Option. On the EBO Date, Lessee shall have the
option, upon at least ninety (90) days' irrevocable prior notice to Lessor and,
if any Secured Certificates are then outstanding, the Indenture Trustee, to
purchase the Aircraft on such date for a purchase price equal to [, at Lessee's
option, either (a)] the Special Purchase Price [, or (b) the amount set forth
under the heading "Initial Installment" on Exhibit B (the "Initial Installment")
(payable on the EBO Date) plus the Remaining Installments]. In addition, if on
such date there shall be any Secured Certificates outstanding, Lessee shall have
the option to assume, pursuant to Section 8(x) of the Participation Agreement
and Section 2.13 of the Trust Indenture, all of the obligations of Lessor under
the Trust Indenture. If such assumption is made, in lieu of paying the Special
Purchase Price on the EBO Date Lessee shall pay Lessor a purchase price equal to
(I) [(x) in the event Lessee has elected to pay the Special Purchase Price,] the
Special Purchase Price [or (y) in the event Lessee has elected to pay the
Initial Installment and the Remaining Installments, the Initial Installment]
minus [in either event] (II) an amount equal to principal of, and accrued but
unpaid interest on, any Secured Certificates that are outstanding on such date.
Upon such payment in full and payment of any other amounts then due hereunder
(including costs or expenses of the Owner Participant in connection with such
purchase, any installments of Basic Rent due prior to such date and, if Basic
Rent is payable in arrears on such date as indicated on Exhibit B, on such date
(but not any installment of Basic Rent due on such date if Basic Rent is payable
in advance on such date), and all unpaid Supplemental Rent due on or prior to
such date), [and, in the event that Lessee has elected to pay the Initial
Installment and the Remaining Installments, after Lessee shall have provided
Lessor with its undertaking to pay the amounts due on the dates set forth under
the heading "Remaining Installments" on Exhibit B (the "Remaining
Installments"),] Lessor will transfer to Lessee, without recourse or warranty
(except as to the absence of Lessor Liens, including for this purpose Liens
which would be Lessor Liens but for the proviso in the definition of Lessor
Liens), all of Lessor's right, title and interest in and to the Aircraft and
under the Trust Indenture and, unless there shall be any Secured Certificates
outstanding after such payment, exercise such rights as it has to cause the
Aircraft to be released from the Lien of the Trust Indenture [; provided,
however, that in the event that Lessee has elected to pay the Initial
Installment and the Remaining Installments, Lessor shall retain a Lien on the
Aircraft until the Remaining Installments, together with interest thereon at the
Past Due Rate for any period from the date due to the date paid, are paid in
full, which Lien shall be evidenced by this Lease, which after the date Lessor
shall have transferred title to the Aircraft to Lessee shall be deemed
terminated as a true lease and shall continue as a lease intended for security,
mutatis mutandis, to secure the payment when due of the Remaining Installments
- -- provision may be utilized only if EBO Date occurs on or after maturity of
Secured Certificates].

            SECTION 20. Security for Lessor's Obligation to Holders of Secured
Certificates. In order to secure the indebtedness evidenced by the Secured
Certificates, Lessor has agreed in the Trust Indenture, among other things, to
assign to the Indenture Trustee this Lease, the Lease Supplements and any
amendments to this Lease and to mortgage its interest in the Aircraft in favor
of the Indenture Trustee, subject to the reservations and conditions therein set
forth. To the extent, if any, that this Lease, the Lease Supplements and any
amendments to this Lease constitute chattel paper (as such term is defined in
the Uniform Commercial Code as in effect in any applicable jurisdiction), no
security interest in this Lease, the Lease Supplements


                                      -53-
<PAGE>

and any amendments to this Lease may be created through the transfer or
possession of any counterpart other than the original counterpart, which shall
be identified as the counterpart containing the receipt therefor executed by the
Indenture Trustee on the signature page thereof. Lessee hereby accepts and
consents to the assignment of all Lessor's right, title and interest in and to
this Lease pursuant to the terms of the Trust Indenture. Subject to Section 3(f)
hereof, Lessee agrees to pay directly to the Indenture Trustee (or, after
receipt by Lessee of notice from the Indenture Trustee of the discharge of the
Trust Indenture, to Lessor), all amounts of Rent due or to become due hereunder
and assigned to the Indenture Trustee and Lessee agrees that the Indenture
Trustee's right to such payments hereunder shall be absolute and unconditional
and shall not be affected by any circumstance, including, without limitation,
the circumstances set forth in clauses (i) through (iv) of Section 18 hereof.
Notwithstanding the foregoing assignment of this Lease, the obligations of
Lessor to Lessee to perform the terms and conditions of this Lease shall remain
in full force and effect.

            SECTION 21. Lessor's Right to Perform for Lessee. If Lessee fails to
make any payment of Rent required to be made by it hereunder or fails to perform
or comply with any of its agreements contained herein, then (but in each case,
except in the case of failure to pay Rent or in the case of failure to maintain
insurance as required hereunder, no earlier than the fifteenth day after the
occurrence of such failure, whether or not it shall yet constitute an Event of
Default hereunder) Lessor may itself make such payment or perform or comply with
such agreement but shall not be obligated hereunder to do so, and the amount of
such payment and the amount of the reasonable expenses of Lessor incurred in
connection with such payment or the performance of or compliance with such
agreement, as the case may be, together with interest thereon at the Past Due
Rate, shall be deemed Supplemental Rent, payable by Lessee upon demand.

            SECTION 22. Investment of Security Funds; Liability of Lessor
Limited. (a) Investment of Security Funds. Any moneys held by Lessor as security
hereunder for future payments to Lessee at a time when there is not continuing
an Event of Default shall, until paid to Lessee, be invested by Lessor or, if
the Trust Indenture shall not have been discharged, by the Indenture Trustee, as
the case may be, as Lessee may from time to time direct in writing (and in
absence of a written direction by Lessee, there shall be no obligation to invest
such moneys) in (i) direct obligations of the United States of America and
agencies guaranteed by the United States government having a final maturity of
ninety (90) days or less from date of purchase thereof; (ii) certificates of
deposit issued by, bankers' acceptances of, or time deposits with, any bank,
trust company or national banking association incorporated under the laws of the
United States of America or one of the states thereof having combined capital
and surplus and retained earnings as of its last report of condition of at least
$500,000,000 and having a rating of Aa or better by Moody's Investors Service,
Inc. ("Moody's") or AA or better by Standard & Poor's Ratings Services, a
division of McGraw-Hill, Inc. ("S&P") and having a final maturity of ninety (90)
days or less from date of purchase thereof; and (iii) commercial paper of any
holding company of a bank, trust company or national banking association
described in (ii) and commercial paper of any corporation or finance company
incorporated or doing business under the laws of the United States of America or
any state thereof having a rating assigned to such commercial paper of A1 by S&P
or P1 by Moody's and having a final maturity of ninety (90) days or less from
the date of purchase thereof; provided, however, that the aggregate amount at
any one time so invested in certificates of deposit issued by any one bank shall
not be in excess


                                      -54-
<PAGE>

of 5% of such bank's capital and surplus. There shall be promptly remitted to
Lessee or its order (but no more frequently than monthly) any gain (including
interest received) realized as a result of any such investment (net of any fees,
commissions and other expenses, if any, incurred in connection with such
investment) unless an Event of Default shall have occurred and be continuing.
Lessee shall be responsible for any net loss realized as a result of any such
investment and shall reimburse Lessor (or the Indenture Trustee, as the case may
be) therefor on demand.

            (b) Liability of Lessor Limited. It is expressly agreed and
understood that all representations, warranties and undertakings of Lessor
hereunder shall be binding upon Lessor only in its capacity as trustee under the
Trust Agreement, and the institution acting as Lessor shall not be liable in its
individual capacity for any breach thereof except for its gross negligence or
willful misconduct or for breach of its covenants, representations and
warranties contained herein, to the extent covenanted or made in its individual
capacity.

            SECTION 23. Service of Process. Lessor and Lessee each hereby
irrevocably submits itself to the non-exclusive jurisdiction of the United
States District Court for the Southern District of New York and to the
non-exclusive jurisdiction of the Supreme Court of the State of New York, New
York County, for the purposes of any suit, action or other proceeding arising
out of this Lease, the subject matter hereof or any of the transactions
contemplated hereby brought by Lessor, Lessee, the Indenture Trustee, the Loan
Participants or the Owner Participant or their successors or assigns.

            SECTION 24. Miscellaneous. Any provision of this Lease which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction. No term or provision of
this Lease may be changed, waived, discharged or terminated orally, but only by
an instrument in writing signed by Lessor, Lessee and any assignee of Lessor's
rights hereunder. This Lease shall constitute an agreement of lease, and nothing
contained herein shall be construed as conveying to Lessee any right, title or
interest in the Aircraft except as a lessee only. Neither Lessee nor any
affiliate of Lessee will file any tax returns in a manner inconsistent with the
foregoing fact or with Lessor's ownership of the Aircraft. The section and
paragraph headings in this Lease and the table of contents are for convenience
of reference only and shall not modify, define, expand or limit any of the terms
or provisions hereof and all references herein to numbered sections, unless
otherwise indicated, are to sections of this Lease. THIS LEASE HAS BEEN
DELIVERED IN THE STATE OF NEW YORK AND SHALL IN ALL RESPECTS BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, INCLUDING ALL
MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. This Lease may be executed by
the parties hereto in separate counterparts, each of which when so executed and
delivered shall be an original, but all such counterparts shall together
constitute but one and the same instrument.

            SECTION 25. Successor Trustee. Lessee agrees that in the case of the
appointment of any successor Owner Trustee pursuant to the terms of the Trust
Agreement, such successor Owner Trustee shall, upon written notice by such
successor Owner Trustee, succeed to


                                      -55-
<PAGE>

all the rights, powers and title of Lessor hereunder and shall be deemed to be
Lessor and the owner of the Aircraft for all purposes hereof without the
necessity of any consent or approval by Lessee (subject to Section 10 of the
Participation Agreement) and without in any way altering the terms of this Lease
or Lessee's obligations hereunder. One such appointment and designation of a
successor Owner Trustee shall not exhaust the right to appoint and designate
further successor Owner Trustees pursuant to the Trust Agreement, but such right
may be exercised repeatedly as long as this Lease shall be in effect.

            SECTION 26. Covenant of Quiet Enjoyment. So long as no Event of
Default shall have occurred and be continuing and notwithstanding any default by
Lessor, the Owner Participant or the Indenture Trustee under the Participation
Agreement, the Trust Agreement or the Trust Indenture, Lessor shall not
interfere with Lessee's (or any Sublessee's) continued possession, use and
operation of, and quiet enjoyment of, the Aircraft or Lessee's rights, benefits
and obligations pursuant to the Overall Transaction during the Term of this
Lease, and this Lease shall not be terminated except as expressly provided
herein.


                                      -56-
<PAGE>

            IN WITNESS WHEREOF, Lessor and Lessee have each caused this Lease to
be duly executed as of the day and year first above written.


                                    FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                                    not in its individual capacity, except as
                                    expressly provided herein, but solely as
                                    Owner Trustee,
                                     Lessor


                                    By:______________________________________
                                       Name:
                                       Title:


                                    NORTHWEST AIRLINES, INC.,
                                     Lessee


                                    By:______________________________________
                                       Name:
                                       Title:

            Receipt of this original  counterpart  of the  foregoing  Lease is
hereby acknowledged on the _____ day of [____________]


                                    STATE STREET BANK AND
                                    TRUST COMPANY,
                                      Indenture Trustee


                                    By:______________________________________
                                       Name:
                                       Title:


                               - Signature Page -
<PAGE>

                                                                    EXHIBIT A
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                              LEASE SUPPLEMENT No.
                                   [NW ____ _]

            LEASE SUPPLEMENT NO. __, dated [_________] between FIRST SECURITY
BANK, NATIONAL ASSOCIATION, not in its individual capacity, but solely as Owner
Trustee under the Trust Agreement [NW ____ _], dated as of [_____________]
between _____________________, as Owner Participant, and such Owner Trustee
(such Owner Trustee, in its capacity as such Owner Trustee, being herein called
"Lessor"), and NORTHWEST AIRLINES, INC. ("Lessee").

            Lessor and Lessee have heretofore entered into that certain Lease
Agreement [NW ____ _], dated as of [___________], relating to one Airbus
[A320-212] [A319-113] aircraft (herein called the "Lease," and the defined terms
therein being hereinafter used with the same meanings). The Lease provides for
the execution and delivery from time to time of Lease Supplements for the
purpose of leasing the Airframe and Engines under the Lease as and when
delivered by Lessor to Lessee in accordance with the terms thereof.

            (1) The Lease relates to the Airframe and Engines described below,
and a counterpart of the Lease is attached hereto, and made a part hereof, and
this Lease Supplement, together with such attachment, is being filed for
recordation on the date hereof with the Federal Aviation Administration as one
document.

            (2) The Lease Agreement relates to the Airframe and Engines
described below, and a counterpart of the Lease Agreement, attached and made a
part of Lease Supplement No. 1 dated [______________] to the Lease Agreement,
has been recorded by the Federal Aviation Administration on [_____________], as
one document and assigned Conveyance No. __.

            NOW, THEREFORE, in consideration of the premises and other good and
sufficient consideration, Lessor and Lessee hereby agree as follows:

            1. Lessor hereby delivers and leases to Lessee under the Lease and
Lessee hereby accepts and leases from Lessor under the Lease the following
described Airbus [A320-212] [A319-113] aircraft (the "Aircraft"), which Aircraft
as of the date hereof consists of the following components:

                  (i) Airframe: FAA Registration No. ______; manufacturer's
            serial no. _____; and

- ----------
(1) This language for Lease Supplement No. 1.

(2) This language for other Lease Supplements.


                               EXHIBIT A - PAGE 1
<PAGE>

                  (ii) Engines: two (2) CFM International, Inc. Model
            CFM56-5A[3][4] engines bearing, respectively, manufacturer's serial
            nos. ______ and ______ (each of which engines has 750 or more rated
            takeoff horsepower or the equivalent of such horsepower).

            2. The Delivery Date of the Aircraft is the date of this Lease
Supplement set forth in the opening paragraph hereof. Except as otherwise
provided in the Lease, the Term for the Aircraft shall commence on the Delivery
Date and end on [_______________].

            3. Lessee hereby confirms its agreement to pay Lessor Basic Rent for
the Aircraft throughout the Term therefor in accordance with Section 3 of the
Lease.

            4. Lessee hereby confirms to Lessor that Lessee has accepted the
Aircraft for all purposes hereof and of the Lease as being airworthy, in good
working order and repair and without defect or inherent vice in title,
condition, design, operation or fitness for use; provided, however, that nothing
contained herein or in the Lease shall in any way diminish or otherwise affect
any right Lessee or Lessor may have with respect to the Aircraft against AVSA,
S.A.R.L., or any subcontractor or supplier of AVSA, S.A.R.L., under the Purchase
Agreement or otherwise.

            5. All of the terms and provisions of the Lease are hereby
incorporated by reference in this Lease Supplement to the same extent as if
fully set forth herein.

            6. This Lease Supplement may be executed by the parties hereto in
separate counterparts, each of which when so executed and delivered shall be an
original, but all such counterparts shall together constitute but one and the
same instrument. To the extent, if any, that this Lease Supplement constitutes
chattel paper (as such term is defined in the Uniform Commercial Code as in
effect in any jurisdiction), no security interest in this Lease Supplement may
be created through the transfer or possession of any counterpart other than the
original counterpart, which shall be identified as the counterpart containing
the receipt therefor executed by the Indenture Trustee on the signature page
hereof.


                               EXHIBIT A - PAGE 2
<PAGE>

            IN WITNESS WHEREOF, Lessor and Lessee have caused this Lease
Supplement to be duly executed on the day and year first above written.


                                    FIRST SECURITY BANK,
                                    NATIONAL ASSOCIATION,
                                    not in its Individual Capacity,
                                    but solely as Owner Trustee,
                                     Lessor


                                    By:_______________________________________
                                       Name:
                                       Title:


                                    NORTHWEST AIRLINES, INC.,
                                     Lessee


                                    By:_______________________________________
                                       Name:
                                       Title:

            (3) Receipt of this original counterpart of the foregoing Lease
Supplement is hereby acknowledged on this ____ day of [______________]


                                    STATE STREET BANK AND
                                    TRUST COMPANY,
                                       Indenture Trustee


                                    By:_______________________________________
                                       Name:
                                       Title:

- ----------
(3) This language contained in the original counterpart only.


                               EXHIBIT A - PAGE 3
<PAGE>

                                                                    EXHIBIT B
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                            BASIC RENT, LESSOR'S COST
                       AND SPECIAL PURCHASE PRICE SCHEDULE

The portion of this Exhibit appearing below this text is intentionally deleted
from the FAA filing counterpart as the parties hereto deem it to contain
confidential information.

                                   Basic Rent:

                    Basic Rent Payable  Basic Rent Payable    Total Basic
                        in Advance          in Arrears            Rent
   Lease Period       (Percentage of      (Percentage of     (Percentage of
       Date           Lessor's Cost)      Lessor's Cost)     Lessor's Cost)
   ------------     ------------------  ------------------   --------------


                               EXHIBIT B - PAGE 1
<PAGE>

                            BASIC RENT, LESSOR'S COST
                       AND SPECIAL PURCHASE PRICE SCHEDULE

The portion of this Exhibit appearing below this text is intentionally deleted
from the FAA filing counterpart as the parties hereto deem it to contain
confidential information.

                    Basic Rent Payable  Basic Rent Payable    Total Basic
                        in Advance          in Arrears            Rent
   Lease Period       (Percentage of      (Percentage of     (Percentage of
       Date           Lessor's Cost)      Lessor's Cost)     Lessor's Cost)
   ------------     ------------------  ------------------   --------------


                               EXHIBIT B - PAGE 2
<PAGE>

                            BASIC RENT, LESSOR'S COST
                       AND SPECIAL PURCHASE PRICE SCHEDULE

Lessor's Cost for the Aircraft:  $[___________]

Special Purchase Price: [_____________]% of Lessor's Cost on [______________].

[Initial Installment:  [__]% of Lessor's Cost on [       ].

Remaining Installments:        Date                 Amount
                               ----                 ------
                               April 15, [ ]        [__]% of Lessor's Cost
                               June 15, [ ]         [__]% of Lessor's Cost
                               September 15, [ ]    [__]% of Lessor's Cost
                               December 15, [ ]     [__]% of Lessor's Cost]


                               EXHIBIT B - PAGE 3
<PAGE>

                                                                    EXHIBIT C
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                         STIPULATED LOSS VALUE SCHEDULE

The portion of this Exhibit appearing below this text is intentionally deleted
from the FAA filing counterpart as the parties hereto deem it to contain
confidential information.

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 1
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 2
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 3
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 4
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 5
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 6
<PAGE>

                         STIPULATED LOSS VALUE SCHEDULE

                    Stipulated               Stipulated Loss
                  Loss Value Date            Value Percentage
                  ---------------            ----------------


                               EXHIBIT C - PAGE 7
<PAGE>

                                                                    EXHIBIT D
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                           TERMINATION VALUE SCHEDULE

The portion of this Exhibit appearing below this text is intentionally deleted
from the FAA filing counterpart as the parties hereto deem it to contain
confidential information.

                                               Termination
                 Termination Date            Value Percentage
                 ----------------            ----------------


                               EXHIBIT D - PAGE 1
<PAGE>

                                                                    EXHIBIT E
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                         RENT RECALCULATION VERIFICATION

The portion of this Exhibit appearing below this text is intentionally deleted
from the FAA filing counterpart as the parties hereto deem it to contain
confidential information.

            1. Any recalculation of Basic Rent, Stipulated Loss Value
percentages, Termination Value percentages, [the Initial Installment, the
Remaining Installments] and the Special Purchase Price pursuant to the Lease
shall be determined by the Owner Participant, and shall maintain the Owner
Participant's Net Economic Return except as assumptions have been modified
pursuant to Section 3 of the Lease or pursuant to the Tax Indemnity Agreement or
the Participation Agreement, as the case may be; provided, however, that Lessee
may request (A) Lessee's independent public accountants to verify such
calculations but without any requirement that the Owner Participant disclose to
such persons the methodology and assumptions and (B) if Lessee believes that
such calculations by the Owner Participant are in error then a nationally
recognized firm of accountants selected by Lessee and reasonably acceptable to
the Owner Participant shall be permitted to verify such calculations and the
Owner Participant will make available to such firm (subject to the execution by
such firm of a confidentiality agreement reasonably acceptable to the Owner
Participant) the methodology and assumptions and any changes made therein
pursuant to Section 3 of the Lease. In the event of a verification under clause
(B) of the first sentence of this paragraph 1 the determination by such firm of
accountants shall be final. Lessee will pay the reasonable costs and expenses of
the verification under clause (B) of the first sentence of this paragraph 1
unless an error adverse to Lessee is established by such firm, and if as a
result of such verification process the Basic Rent is adjusted and such
adjustment causes the Net Present Value of Rents to decline by [_] or more basis
points (in which event the Owner Participant shall pay the reasonable costs and
expenses of such verification process). Such recalculated Basic Rent, Stipulated
Loss Value percentages, Termination Value percentages [, Initial Installment,
Remaining Installments] and Special Purchase Price shall be set forth in a Lease
Supplement or an amendment to the Lease.

            2. "Net Economic Return" means the Owner Participant's net after-tax
yield and aggregate after-tax cash flow, in each case computed from the Delivery
Date through the EBO Date and through [___________________], utilizing the
multiple investment sinking fund method of analysis, computed on the basis of
the same methodology and assumptions as were utilized by the Owner Participant
in determining Basic Rent, the Special Purchase Price, [the Initial Installment,
the Remaining Installments,] Stipulated Loss Value and Termination Value
percentages as of the Delivery Date.


                               EXHIBIT E - PAGE 1
<PAGE>

                                                                    EXHIBIT F
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                SCHEDULE OF DOMICILES OF PERMITTED SUBLESSEES

Argentina                                  Malta
Australia                                  Mexico
Austria                                    Morocco
Bahamas                                    Netherlands
Belgium                                    New Zealand
Brazil                                     Norway
Canada                                     Paraguay
Chile                                      People's Republic of China
Denmark                                    Philippines
Egypt                                      Portugal
Finland                                    Republic of China (Taiwan)*
France                                     Singapore
Germany                                    South Africa
Greece                                     South Korea
Hungary                                    Spain
Iceland                                    Sweden
India                                      Switzerland
Indonesia                                  Thailand
Ireland                                    Trinidad and Tobago
Italy                                      United Kingdom
Japan                                      Uruguay
Luxembourg                                 Venezuela
Malaysia

- ----------
* So long as on the date of entering into the proposed sublease such country and
the United States have diplomatic relations at least as good as those in effect
on the Delivery Date.


                               EXHIBIT F - PAGE 1
<PAGE>

                                                                    EXHIBIT G
                                                                       to
                                                                 Lease Agreement
                                                                   [NW ____ _]

                                RETURN CONDITIONS

            The portion of this Exhibit appearing below this text is
intentionally deleted from the FAA filing counterpart as the parties hereto deem
it to contain confidential information.

            Unless purchased by Lessee pursuant to Section 19 of the Lease, at
the time of return of the Airframe upon the expiration of the Lease at the end
of the Basic Term or any Renewal Term or upon the termination of the Lease
pursuant to Section 9(c) or 15 of the Lease: (i) in the event that Lessee (or
any Sublessee then in possession of the Aircraft) shall not then be using a
continuous maintenance program with respect to the Airframe, Lessee agrees that
during the period of operation of the Aircraft immediately prior to such return
(A) Lessee or such Sublessee, as the case may be, shall have been using a block
overhaul program with respect to the Airframe which shall have been approved by
all necessary governmental approvals of the country under the laws of which the
Aircraft shall then have been registered and (B) the Airframe shall have
remaining until the next scheduled block overhaul at least 25% of the allowable
hours between block overhauls permitted under the block overhaul program then
used by Lessee or such Sublessee, (ii) in the event that Lessee (or any
Sublessee then in possession of the Aircraft) during the period of operation of
the Aircraft immediately prior to such return shall not have been using an
on-condition maintenance program with respect to the Engines or engines, Lessee
agrees that the average number of hours or cycles of operation (whichever shall
be applicable under the maintenance program then in use with respect to such
Engines or engines) on such Engines or engines remaining until the next
scheduled engine refurbishment shall be at least 25% of the hours or cycles
(whichever shall be applicable) between engine refurbishment allowed under the
maintenance program then in use with respect to such Engines or engines which
shall have been approved by all necessary governmental approvals of the country
under the laws of which the Aircraft shall have then been registered, (iii) the
Aircraft shall have all Lessee's and any Sublessee's exterior markings removed
or painted over and the areas where such markings were removed or painted over
refurbished as necessary to blend with adjacent areas, (iv) the Aircraft shall
have no outstanding airworthiness directives issued by the FAA requiring
terminating action by the date of return, and (v) the Aircraft shall be in
Lessee's or such Sublessee's passenger configuration and the interior of the
Airframe shall be clean in accordance with Lessee's customary standards for a
"between flights" cleaning. In the event the FAA shall issue any directive which
would require improvements to the Aircraft in order for the airworthiness
certificate of the Aircraft to be maintained in good standing, Lessee shall not
apply for an extension of the date of compliance with the directive as to the
Aircraft to a date after the date of return of the Aircraft pursuant to Section
5 of the Lease, unless it shall previously or concurrently have applied for such
an extension with respect to all Airbus [A320-200] [A319-100] aircraft in its
fleet affected by such directive.

            If clause (i)(B) of the first sentence of the preceding paragraph
shall be applicable but the Airframe does not meet the conditions specified in
said clause (i)(B), Lessee shall pay or


                               EXHIBIT G - PAGE 1
<PAGE>

cause to be paid to Lessor a Dollar amount computed by multiplying (I) 120% of
the average direct cost to Lessee (based upon the actual direct cost to Lessee
for similar aircraft in the fleet of Lessee) during the preceding 12 months of
performing an airframe block overhaul of the type referred to in such clause (i)
by (II) a fraction of which (x) the numerator shall be the excess of 25% of
hours of operation allowable between such block overhauls over the actual number
of hours of operation remaining on the Airframe to the next such block overhaul
and (y) the denominator shall be the number of hours of operation allowable
between such block overhauls in accordance with such block overhaul program.

            If clause (ii) of the first sentence of the second preceding
paragraph shall be applicable but the Engines or engines do not meet the
conditions specified in said clause (ii), Lessee shall pay or cause to be paid
to Lessor a Dollar amount computed by multiplying (aa) two by (bb) 120% of the
average direct cost to Lessee (based upon the actual direct cost to Lessee for
similar aircraft in the fleet of Lessee) during the preceding 12 months of
performing for an engine of the same model as the Engines the scheduled engine
refurbishment under the maintenance program then used by Lessee or any Sublessee
for engines of the same model as the Engines by (cc) a fraction of which (x) the
numerator shall be the excess of 25% of the hours or cycles of operation
(whichever is applicable) between engine refurbishment allowable for an engine
under the maintenance program then in use with respect to such Engines or
engines over the actual average number of hours or cycles of operation on such
Engines or engines remaining until the next such scheduled engine refurbishment
and (y) the denominator shall be the number of hours or cycles allowable between
such scheduled engine refurbishment.


                               EXHIBIT G - PAGE 2



================================================================================

                     TRUST INDENTURE AND SECURITY AGREEMENT
                                   [NW ____ _]

                          Dated as of [_______________]

                                     Between

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                         not in its individual capacity,
                       except as expressly stated herein,
                          but solely as Owner Trustee,

                                  Owner Trustee

                                       and

                      STATE STREET BANK AND TRUST COMPANY,
                         not in its individual capacity,
                       except as expressly stated herein,
                        but solely as Indenture Trustee,

                                Indenture Trustee

                             -----------------------

                          SECURED CERTIFICATES COVERING
                    ONE AIRBUS [A320-212] [A319-113] AIRCRAFT
                    BEARING U.S. REGISTRATION MARK N[______]
                       LEASED BY NORTHWEST AIRLINES, INC.

================================================================================
<PAGE>

                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

                                    ARTICLE I

                                   DEFINITIONS

SECTION 1.01.    Definitions...................................................6
SECTION 1.02.    Reference to Other Documents.................................11

                                   ARTICLE II

                            THE SECURED CERTIFICATES

SECTION 2.01.    Form of Secured Certificates.................................11
SECTION 2.02.    Issuance and Terms of Secured Certificates...................17
SECTION 2.03.    Payments from Trust Indenture Estate Only....................19
SECTION 2.04.    Method of Payment............................................21
SECTION 2.05.    Application of Payments......................................23
SECTION 2.06.    Termination of Interest in Trust Indenture Estate............23
SECTION 2.07.    Registration, Transfer and Exchange of Secured
                 Certificates ................................................24
SECTION 2.08.    Mutilated, Destroyed, Lost or Stolen Secured Certificates....25
SECTION 2.09.    Payment of Expenses on Transfer; Cancellation................25
SECTION 2.10.    Mandatory Redemptions of Secured Certificates................26
SECTION 2.11.    Voluntary Redemptions of Secured Certificates................26
SECTION 2.12.    Redemptions; Notice of Redemption............................26
SECTION 2.13.    Assumption of Secured Certificates by Lessee.................27
SECTION 2.14.    Option to Purchase Secured Certificates......................28
SECTION 2.15.    Subordination................................................29

                                   ARTICLE III

                    RECEIPT, DISTRIBUTION AND APPLICATION OF
                     INCOME FROM THE TRUST INDENTURE ESTATE

SECTION 3.01.    Basic Rent Distribution......................................29
SECTION 3.02.    Event of Loss; Replacement; Voluntary Termination;
                 Refinancing .................................................30
SECTION 3.03.    Payments After Event of Default..............................31
SECTION 3.04.    Certain Payments.............................................33
SECTION 3.05.    Other Payments...............................................34
SECTION 3.06.    Payments to the Owner Trustee................................34
SECTION 3.07.    Application of Payments Under Guarantee......................35


                                       -i-
<PAGE>

                                   ARTICLE IV

                    COVENANTS OF THE OWNER TRUSTEE; EVENTS OF
                     DEFAULT; REMEDIES OF INDENTURE TRUSTEE

SECTION 4.01.    Covenants of the Owner Trustee...............................35
SECTION 4.02.    Event of Default.............................................36
SECTION 4.03.    Certain Rights...............................................38
SECTION 4.04.    Remedies.....................................................39
SECTION 4.05.    Return of Aircraft, Etc......................................41
SECTION 4.06.    Remedies Cumulative..........................................42
SECTION 4.07.    Discontinuance of Proceedings................................42
SECTION 4.08.    Waiver of Past Defaults......................................43
SECTION 4.09.    Appointment of Receiver......................................43
SECTION 4.10.    Indenture Trustee Authorized to Execute Bills of Sale, Etc...43
SECTION 4.11.    Rights of Certificate Holders to Receive Payment.............43

                                    ARTICLE V

                         DUTIES OF THE INDENTURE TRUSTEE

SECTION 5.01.    Notice of Event of Default...................................44
SECTION 5.02.    Action upon Instructions; Certain Rights and Limitations.....44
SECTION 5.03.    Indemnification..............................................47
SECTION 5.04.    No Duties Except as Specified in Trust Indenture or
                 Instructions ................................................47
SECTION 5.05.    No Action Except Under Lease, Trust Indenture or
                 Instructions ................................................48
SECTION 5.06.    Replacement Airframes and Replacement Engines................48
SECTION 5.07.    Indenture Supplements for Replacements.......................50
SECTION 5.08.    Effect of Replacement........................................50
SECTION 5.09.    Investment of Amounts Held by Indenture Trustee..............51

                                   ARTICLE VI

                   THE OWNER TRUSTEE AND THE INDENTURE TRUSTEE

SECTION 6.01.    Acceptance of Trusts and Duties..............................51
SECTION 6.02.    Absence of Duties............................................52
SECTION 6.03.    No Representations or Warranties as to Aircraft or
                 Documents ...................................................52
SECTION 6.04.    No Segregation of Monies; No Interest........................53
SECTION 6.05.    Reliance; Agreements; Advice of Counsel......................53
SECTION 6.06.    Capacity in Which Acting.....................................54
SECTION 6.07.    Compensation.................................................54
SECTION 6.08.    Instructions from Certificate Holders........................54


                                      -ii-
<PAGE>

                                   ARTICLE VII

          INDEMNIFICATION OF THE INDENTURE TRUSTEE BY THE OWNER TRUSTEE

SECTION 7.01.    Scope of Indemnification.....................................54

                                  ARTICLE VIII

                         SUCCESSOR AND SEPARATE TRUSTEES

SECTION 8.01.    Notice of Successor Owner Trustee............................55
SECTION 8.02.    Resignation of Indenture Trustee; Appointment of Successor...55
SECTION 8.03.    Appointment of Additional and Separate Trustees..............57

                                   ARTICLE IX

                SUPPLEMENT AND AMENDMENTS TO THIS TRUST INDENTURE
                               AND OTHER DOCUMENTS

SECTION 9.01.    Instructions of Majority; Limitations........................58
SECTION 9.02.    Trustees Protected...........................................60
SECTION 9.03.    Documents Mailed to Certificate Holders......................60
SECTION 9.04.    No Request Necessary for Lease Supplement or Trust
                 Agreement and Indenture Supplement ..........................60

                                    ARTICLE X

                                  MISCELLANEOUS

SECTION 10.01.   Termination of Trust Indenture...............................61
SECTION 10.02.   No Legal Title to Trust Indenture Estate in Certificate
                 Holders                                                      61
SECTION 10.03.   Sale of Aircraft by Indenture Trustee Is Binding.............61
SECTION 10.04.   Trust Indenture for Benefit of the Owner Trustee, the
                 Indenture Trustee, Owner Participant, Lessee and
                 Certificate Holders .........................................62
SECTION 10.05.   Notices......................................................62
SECTION 10.06.   Severability.................................................62
SECTION 10.07.   No Oral Modification or Continuing Waivers...................62
SECTION 10.08.   Successors and Assigns.......................................63
SECTION 10.09.   Headings.....................................................63
SECTION 10.10.   Normal Commercial Relations..................................63
SECTION 10.11.   Governing Law; Counterpart Form..............................63
SECTION 10.12.   Voting By Certificate Holders................................63
SECTION 10.13.   Bankruptcy...................................................64
SECTION 10.14.   No Action Contrary to Lessee's Rights Under the Lease........64


                                     -iii-
<PAGE>

EXHIBIT A         Form of Trust Agreement and Indenture Supplement

                  SCHEDULE I        Secured Certificates Amortization

                  SCHEDULE II       Pass Through Trust Agreements


                                      -iv-
<PAGE>

                     TRUST INDENTURE AND SECURITY AGREEMENT
                                   [NW ____ _]

            TRUST INDENTURE AND SECURITY AGREEMENT [NW ____ _], dated as of
[_______________] ("Trust Indenture") between FIRST SECURITY BANK, NATIONAL
ASSOCIATION, a national banking association, not in its individual capacity,
except as expressly stated herein, but solely as Owner Trustee under the Trust
Agreement referred to below (together with its successors under the Trust
Agreement, the "Owner Trustee"), and STATE STREET BANK AND TRUST COMPANY, a
Massachusetts trust company, not in its individual capacity, except as expressly
stated herein, but solely as Indenture Trustee hereunder (together with its
successors hereunder, the "Indenture Trustee").

                              W I T N E S S E T H:

            WHEREAS, all capitalized terms used herein shall have the respective
meanings set forth or referred to in Article I hereof;

            WHEREAS, the Owner Participant and FSB have entered into the Trust
Agreement whereby, among other things, (i) the Owner Trustee has established a
certain trust for the use and benefit of the Owner Participant subject, however,
to the Trust Indenture Estate created pursuant hereto for the use and benefit
of, and with the priority of payment to, the holders of Secured Certificates
issued hereunder, and (ii) the Owner Trustee has been authorized and directed to
execute and deliver this Trust Indenture;

            WHEREAS, the parties desire by this Trust Indenture, among other
things, (i) to provide for the issuance by the Owner Trustee to the Pass Through
Trustees (or their designee) of the Secured Certificates evidencing the
participation of the Pass Through Trustees in the payment of Lessor's Cost for
the Aircraft, as provided in the Participation Agreement and (ii) to provide for
the assignment, mortgage and pledge by the Owner Trustee to the Indenture
Trustee, as part of the Trust Indenture Estate hereunder, among other things, of
all of the Owner Trustee's right, title and interest in and to the Aircraft and,
except as hereinafter expressly provided, all of the Owner Trustee's right,
title and interest in, to and under the Lease and all payments and other amounts
received hereunder or thereunder in accordance with the terms hereof or thereof,
as security for, among other things, the Owner Trustee's obligations to the
Indenture Trustee, for the ratable benefit and security of the Certificate
Holders, subject to Section 2.15 and Article III hereof;

            WHEREAS, all things have been done to make the Secured Certificates,
when executed by the Owner Trustee and authenticated and delivered by the
Indenture Trustee hereunder, the valid, binding and enforceable obligations of
the Owner Trustee; and

            WHEREAS, all things necessary to make this Trust Indenture the
valid, binding and legal obligation of the Owner Trustee for the uses and
purposes herein set forth, in accordance with its terms, have been done and
performed and have happened:
<PAGE>

                                 GRANTING CLAUSE

            NOW, THEREFORE, THIS TRUST INDENTURE AND SECURITY AGREEMENT
WITNESSETH, that, to secure the prompt payment of the Principal Amount of,
interest on, Make-Whole Amount, if any, and all other amounts due with respect
to, all Secured Certificates from time to time outstanding hereunder and the
performance and observance by the Owner Trustee of all the agreements, covenants
and provisions herein and in the Participation Agreement and the Secured
Certificates contained, for the benefit of the Certificate Holders and the
prompt payment of all amounts from time to time owing hereunder and under the
Participation Agreement to the Certificate Holders by the Owner Trustee and for
the uses and purposes and subject to the terms and provisions hereof, and in
consideration of the premises and of the covenants herein contained, and of the
acceptance of the Secured Certificates by the holders thereof, and for other
good and valuable consideration the receipt and adequacy whereof are hereby
acknowledged, the Owner Trustee has granted, bargained, sold, assigned,
transferred, conveyed, mortgaged, pledged and confirmed, and does hereby grant,
bargain, sell, assign, transfer, convey, mortgage, pledge and confirm, unto the
Indenture Trustee, its successors in trust and assigns, for the security and
benefit of the Certificate Holders, a first priority security interest in and
mortgage lien on all right, title and interest of the Owner Trustee in, to and
under the following described property, rights and privileges, other than
Excluded Payments (which collectively, excluding Excluded Payments but including
all property hereafter specifically subjected to the Lien of this Trust
Indenture by the Trust Agreement and Indenture Supplement or any mortgage
supplemental hereto, are included within the Trust Indenture Estate), to wit:

            (1) the Aircraft (including the Airframe and the Engines and all
replacements thereof and substitutions therefor to which the Owner Trustee shall
from time to time acquire title as provided herein and in the Lease), all as
more particularly described in the Trust Agreement and Indenture Supplement
executed and delivered with respect to the Aircraft or any such replacements or
substitutions therefor, as provided in this Indenture;

            (2) the Lease and any Lease Supplement and all Rent thereunder
(including, without limitation, all amounts of Basic Rent, Supplemental Rent and
payments of any kind thereunder (excluding any Excluded Payments)), and the
Guarantee;

            (3) the Purchase Agreement and the Guaranty (each to the extent
specified in the Purchase Agreement Assignment), the Purchase Agreement
Assignment, the Consent and Agreement and the Bill of Sale;

            (4) all rents, issues, profits, revenues and other income of the
property subjected or required to be subjected to the lien of this Indenture;

            (5) all insurance and requisition proceeds with respect to the
Aircraft, including but not limited to the insurance required under Section 11
of the Lease, but excluding insurance proceeds described in clauses (ii) and
(iii) of the definition of Excluded Payments;

            (6) all rights of the Owner Trustee to amounts paid or payable by
Lessee to the Owner Trustee under the Participation Agreement and all rights of
the Owner Trustee to


                                      -2-
<PAGE>

enforce payments of any such amounts thereunder, but excluding amounts described
in clauses (i) and (v) of the definition of Excluded Payments;

            (7) all monies and securities from time to time deposited or
required to be deposited with the Indenture Trustee pursuant to any terms of
this Indenture or the Lease or required hereby or by the Lease to be held by the
Indenture Trustee hereunder (other than Excluded Payments); and

            (8) all proceeds of the foregoing.

            BUT EXCLUDING from the foregoing and from the Trust Indenture Estate
all Excluded Payments, and the right to enforce and collect the same, and
SUBJECT TO all of the terms and conditions of this Trust Indenture and the
rights of the Owner Trustee and the Owner Participant hereunder.

            Concurrently with the delivery hereof, the Owner Trustee is
delivering to the Indenture Trustee the original executed counterpart of the
Lease and the Lease Supplement No. 1 (to each of which a chattel paper receipt
is attached), and executed copies of the Participation Agreement, and the
Purchase Agreement Assignment with the Consent and Agreement attached thereto.

            TO HAVE AND TO HOLD all and singular the aforesaid property unto the
Indenture Trustee, and its successors and assigns, in trust for the benefit and
security of the Certificate Holders, except as provided in Section 2.15 and
Article III hereof without any preference, distinction or priority of any one
Secured Certificate over any other by reason of priority of time of issue, sale,
negotiation, date of maturity thereof or otherwise for any reason whatsoever,
and for the uses and purposes and in all cases and as to all property specified
in paragraphs (1) through (8) inclusive above, subject to the terms and
provisions set forth in this Trust Indenture.

            It is expressly agreed that anything herein contained to the
contrary notwithstanding, the Owner Trustee shall remain liable under each of
the Indenture Agreements to which it is a party to perform all of the
obligations assumed by it thereunder, except to the extent prohibited or
excluded from doing so pursuant to the terms and provisions thereof, and the
Indenture Trustee and the Certificate Holders shall have no obligation or
liability under the Indenture Agreements, by reason of or arising out of the
assignment hereunder, nor shall the Indenture Trustee or the Certificate Holders
be required or obligated in any manner to perform or fulfill any obligations of
the Owner Trustee under or pursuant to any of the Indenture Agreements to which
it is a party, or, except as herein expressly provided, to make any payment, or
to make any inquiry as to the nature or sufficiency of any payment received by
it, or present or file any claim, or take any action to collect or enforce the
payment of any amounts which may have been assigned to it or to which it may be
entitled at any time or times.

            The Owner Trustee does hereby constitute the Indenture Trustee the
true and lawful attorney of the Owner Trustee, irrevocably, granted for good and
valuable consideration and coupled with an interest and with full power of
substitution, and with full power (in the name of the Owner Trustee or
otherwise) to ask for, require, demand, receive, compound and give


                                      -3-
<PAGE>

acquittance for any and all monies and claims for monies (in each case including
insurance and requisition proceeds but in all cases excluding Excluded Payments)
due and to become due under or arising out of the Indenture Agreements, and all
other property which now or hereafter constitutes part of the Trust Indenture
Estate, to endorse any checks or other instruments or orders in connection
therewith and to file any claims or to take any action or to institute any
proceedings which the Indenture Trustee may deem to be necessary or advisable in
the premises. Without limiting the generality of the foregoing, but subject to
the rights of the Owner Trustee and the Owner Participant hereunder, during the
continuance of any Event of Default under this Trust Indenture, the Indenture
Trustee shall have the right under such power of attorney to accept any offer in
connection with the exercise of remedies as set forth herein of any purchaser to
purchase the Airframe and Engines and upon such purchase to execute and deliver
in the name of and on behalf of the Owner Trustee an appropriate bill of sale
and other instruments of transfer relating to the Airframe and Engines, when
purchased by such purchaser, and to perform all other necessary or appropriate
acts with respect to any such purchase, and in its discretion to file any claim
or take any other action or proceedings, either in its own name or in the name
of the Owner Trustee or otherwise, which the Indenture Trustee may deem
necessary or appropriate to protect and preserve the right, title and interest
of the Indenture Trustee in and to such Rents and other sums and the security
intended to be afforded hereby; provided, however, that no action of the
Indenture Trustee pursuant to this paragraph shall increase the obligations or
liabilities of the Owner Trustee to any Person beyond those obligations and
liabilities specifically set forth in this Trust Indenture and in the other
Operative Documents. Under the Lease, Lessee is directed, so long as this Trust
Indenture shall not have been fully discharged, to make all payments of Rent
(other than Excluded Payments) and all other amounts which are required to be
paid to or deposited with the Owner Trustee pursuant to the Lease (other than
Excluded Payments) directly to, or as directed by, the Indenture Trustee at such
address or addresses as the Indenture Trustee shall specify, for application as
provided in this Trust Indenture. The Owner Trustee agrees that promptly upon
receipt thereof, it will transfer to the Indenture Trustee any and all monies
from time to time received by it constituting part of the Trust Indenture
Estate, for distribution by the Indenture Trustee pursuant to this Trust
Indenture, except that the Owner Trustee shall accept for distribution pursuant
to the Trust Agreement any amounts distributed to it by the Indenture Trustee
under this Trust Indenture.

            The Owner Trustee agrees that at any time and from time to time,
upon the written request of the Indenture Trustee, the Owner Trustee will
promptly and duly execute and deliver or cause to be duly executed and delivered
any and all such further instruments and documents as the Indenture Trustee may
reasonably deem necessary or desirable to perfect, preserve or protect the
mortgage, security interests and assignments created or intended to be created
hereby or to obtain for the Indenture Trustee the full benefits of the
assignment hereunder and of the rights and powers herein granted. The parties
hereto acknowledge that neither the Owner Trustee nor the Owner Participant
shall have any obligation as to any recording, filing, refiling or re-recording
of any documents or instruments in regard to maintaining the perfection of the
security interests created hereunder, in the Trust Indenture Estate or any
security interest that may be claimed to have been created by the Lease or the
ownership interest of the Owner Trustee in the Aircraft.

            The Owner Trustee does hereby warrant and represent that it has not
assigned or pledged, and hereby covenants and agrees that it will not assign or
pledge, so long as the


                                      -4-
<PAGE>

assignment hereunder shall remain in effect, and the Lien hereof shall not have
been released pursuant to Section 10.01 hereof, any of its right, title or
interest hereby assigned, to anyone other than the Indenture Trustee and its
predecessor(s) in this transaction, and that it will not, except as otherwise
provided in this Trust Indenture and except with respect to Excluded Payments to
which it is entitled, (i) accept any payment from Lessee under any Indenture
Agreement, (ii) enter into any agreement amending or supplementing any Indenture
Agreement, (iii) execute any waiver or modification of, or consent under, the
terms of, or exercise any rights, powers or privileges under, any Indenture
Agreement, (iv) settle or compromise any claim (other than those relating to an
Excluded Payment) arising under any Indenture Agreement or (v) submit or consent
to the submission of any dispute, difference or other matter arising under or in
respect of any Indenture Agreement to arbitration thereunder.

            The Owner Trustee does hereby further agree that it will not without
the written consent of the Indenture Trustee:

            (a)   collect or agree to the receipt or collection of any payment
                  of Rent (other than Excluded Payments), including Basic Rent,
                  Stipulated Loss Value, Termination Value or any other payment
                  to be made pursuant to Section 9 or 10 of the Lease prior to
                  the date for the payment thereof provided for by the Lease or
                  assign, transfer or hypothecate (other than to the Indenture
                  Trustee hereunder) any payment of Rent, including Basic Rent,
                  Stipulated Loss Value, Termination Value or any other payment
                  to be made pursuant to Section 9 or 10 of the Lease, then due
                  or to accrue in the future under the Lease in respect of the
                  Airframe and Engines; or

            (b)   except as contemplated by the Trust Agreement in connection
                  with the appointment of a successor owner trustee, sell,
                  mortgage, transfer, assign or hypothecate (other than to the
                  Indenture Trustee hereunder) its interest in the Airframe and
                  Engines or any part thereof or in any amount to be received by
                  it from the use or disposition of the Airframe and Engines,
                  other than amounts distributed to it pursuant to Article III
                  hereof.

            It is hereby further agreed that any and all property described or
referred to in the granting clauses hereof which is hereafter acquired by the
Owner Trustee shall ipso facto, and without any further conveyance, assignment
or act on the part of the Owner Trustee or the Indenture Trustee, become and be
subject to the Lien herein granted as fully and completely as though
specifically described herein, but nothing contained in this paragraph shall be
deemed to modify or change the obligations of the Owner Trustee contained in the
foregoing paragraphs.

            The Owner Trustee does hereby ratify and confirm the Lease and does
hereby agree that it will not violate any covenant or agreement made by it
therein, herein or in any of the other Owner Trustee Documents.

            Notwithstanding the Granting Clause or any of the foregoing
paragraphs, there is hereby excluded from the foregoing sale, transfer,
assignment, grant, pledge and security interest all Excluded Payments.


                                      -5-
<PAGE>

            IT IS HEREBY COVENANTED AND AGREED by and between the parties hereto
as follows: ARTICLE I

                                   ARTICLE I

                                   DEFINITIONS

            SECTION 1.01. Definitions. For all purposes of this Indenture the
following terms shall have the following meanings (such definitions to be
equally applicable to both the singular and plural forms of the terms defined):

            "Actual Knowledge" shall mean, (i) as it applies to the Owner
Trustee or Indenture Trustee, as the case may be, actual knowledge of a
Responsible Officer in the Trust Office of the Owner Trustee or in the Corporate
Trust Office of the Indenture Trustee, as the case may be, and (ii) as it
applies to the Owner Participant, actual knowledge of a vice president or other
higher officer of the Owner Participant having responsibility for the
transactions contemplated by the Operative Documents.

            "Amortization Amount" shall mean, with respect to any Principal
Amount Repayment Date, the amount set forth opposite such Date on the
Amortization Schedule.

            "Amortization Schedule" shall mean the amortization schedule for the
Secured Certificates delivered pursuant to Section 2.02 hereof.

            "Average Life Date" for each Secured Certificate to be redeemed
shall be the date which follows the redemption date by a period equal to the
Remaining Weighted Average Life at the redemption date of such Secured
Certificate. "Remaining Weighted Average Life" of such Secured Certificate, at
the redemption date of such Secured Certificate, shall be the number of days
equal to the quotient obtained by dividing (a) the sum of the products obtained
by multiplying (i) the amount of each then remaining installment of principal,
including the payment due on the maturity date of such Secured Certificate, by
(ii) the number of days from and including the redemption date to but excluding
the scheduled payment date of such principal installment; by (b) the then unpaid
principal amount of such Secured Certificate.

            "Cash Equivalents" shall mean the investments specified in Section
22(a) of the Lease.

            "Certificate Holder" shall mean any holder from time to time of one
or more Secured Certificates.

            "Code" shall mean the Internal Revenue Code of 1986, as amended.

            "Continuous Stay Period" shall have the meaning specified in Section
4.04(a) hereof.

            "Corporate Trust Department" or "Trust Office" means the principal
corporate trust office of the Owner Trustee located at 79 South Main Street,
Salt Lake City, Utah 84111,


                                      -6-
<PAGE>

Attention: Corporate Trust Department, or such other office at which the Owner
Trustee's corporate trust business shall be administered which the Owner Trustee
shall have specified by notice in writing to Lessee, the Indenture Trustee, the
Owner Participant and each Certificate Holder.

            "Corporate Trust Office" shall mean the principal office of the
Indenture Trustee located at 225 Franklin Street, Boston, Massachusetts 02110,
Attention: Corporate Trust Department, or such other office at which the
Indenture Trustee's corporate trust business shall be administered which the
Indenture Trustee shall have specified by notice in writing to Lessee, the Owner
Trustee, the Loan Participants and each Certificate Holder.

            "Debt" shall mean any liability for borrowed money, or any liability
for the payment of money in connection with any letter of credit transaction, or
other liabilities evidenced or to be evidenced by bonds, debentures, notes or
other similar instruments or for the deferred purchase price of property, goods
or services.

            "Debt Rate" shall mean, with respect to any Series, the rate per
annum specified for such Series under the heading "Interest Rate" in Schedule I
to the Trust Indenture.

            "Default" means any event or condition that with the giving of
notice or the lapse of time or both would become an Event of Default or Lease
Event of Default (excluding Lease Events of Default related to Excluded
Payments).

            "Dollars" and "$" shall mean the lawful currency of the United
States of America.

            "Enforcement Date" shall have meaning specified in Section 4.03
hereof.

            "Event of Default" shall have the meaning specified in Section 4.02
hereof.

            "Excess Amount" shall have the meaning specified in Section 2.03(b)
hereof.

            "Excluded Payments" shall mean (i) indemnity payments paid or
payable by Lessee to or in respect of the Owner Participant or the Owner Trustee
in its individual capacity, their respective Affiliates, successors and
permitted assigns and their directors, officers, employees, servants and agents
(collectively, the "Owner Indemnitees") pursuant to Sections 7(b), 7(c), 16 and
17 of the Participation Agreement, (ii) proceeds of public liability insurance
in respect of the Aircraft payable as a result of insurance claims made, or
losses suffered, by the Owner Trustee or the Indenture Trustee in their
respective individual capacities or by any of the Owner Indemnitees, (iii)
proceeds of insurance maintained with respect to the Aircraft by the Owner
Participant (whether directly or through the Owner Trustee) or any other Owner
Indemnitee and permitted under Section 11(e) of the Lease, (iv) all payments
required to be made under the Tax Indemnity Agreement by Lessee and all payments
of Supplemental Rent by Lessee in respect of any amounts payable under the Tax
Indemnity Agreement, (v) fees payable to the Owner Trustee or the Indenture
Trustee pursuant to the last sentence of Section 7(c) of the Participation
Agreement, (vi) provided that the Secured Certificates shall have been duly
assumed by Lessee pursuant to Section 2.13 hereof, the amounts payable to the
Owner Trustee pursuant to the third sentence of Section 19(d) of the Lease plus
all reasonable expenses incurred


                                      -7-
<PAGE>

by the Owner Trustee and the Owner Participant in connection with such
assumption, as applicable, (vii) any payment of the foregoing under the
Guarantee, (viii) interest accrued on any of the above, and (ix) any right to
enforce the payment of any amount described in clauses (i) through (viii) above
and the right to declare an Event of Default in respect of any of the foregoing
amounts.

            "FSB" shall mean First Security Bank, National Association, a
national banking association.

            "Government Entity" means (a) any federal, state, provincial or
similar government, and any body, board, department, commission, court,
tribunal, authority, agency or other instrumentality of any such government or
otherwise exercising any executive, legislative, judicial, administrative or
regulatory functions of such government or (b) any other government entity
having jurisdiction over any matter contemplated by the Operative Agreements or
relating to the observance or performance of the obligations of any of the
parties to the Operative Agreements.

            "Guarantor" shall have the meaning specified in the Lease.

            "Indenture Agreements" means the Participation Agreement, the Lease,
the Purchase Agreement, the Purchase Agreement Assignment, the Consent and
Agreement, the Guarantee, the Guaranty, the Bills of Sale and any other
contract, agreement or instrument from time to time assigned or pledged under
the Trust Indenture.

            "Indenture Trustee Event" means either (i) the Secured Certificates
shall have become due and payable pursuant to Section 4.04(b) of the Trust
Indenture or (ii) the Indenture Trustee has taken action or notified the Owner
Trustee that it intends to take action to foreclose the Lien of the Trust
Indenture or otherwise commence the exercise of any significant remedy under the
Trust Indenture or the Lease.

            "Law" shall mean (a) any constitution, treaty, statute, law,
regulation, order, rule or directive of any Government Entity, and (b) any
judicial or administrative interpretation or application of, or decision under,
any of the foregoing.

            "Lease" shall mean that certain Lease Agreement [NW ____ _], dated
as of [_______________], entered into by the Owner Trustee and Lessee
concurrently with the execution and delivery hereof, as said Lease Agreement has
been, or may from time to time be, supplemented or amended, or the terms thereof
waived or modified, to the extent permitted by, and in accordance with, the
terms of this Indenture. The term "Lease" shall also include each Lease
Supplement from time to time entered into pursuant to the terms of the Lease.

            "Lease Default" shall mean a "Default" as defined in the Lease.

            "Lease Event of Default" shall mean an "Event of Default" as defined
in the Lease.

            "Lessee" shall mean Northwest Airlines, Inc., a Minnesota
corporation.


                                      -8-
<PAGE>

            "Lessee Operative Documents" means the Participation Agreement, the
Lease, Lease Supplement No. 1, the Tax Indemnity Agreement, the Purchase
Agreement Assignment, the FAA Bill of Sale and the Bill of Sale.

            "Majority in Interest of Certificate Holders" as of a particular
date of determination shall mean the holders of more than a majority in
aggregate unpaid Principal Amount of all Secured Certificates outstanding as of
such date (excluding any Secured Certificates held by the Owner Trustee or the
Owner Participant or any interests of the Owner Participant therein by reason of
subrogation pursuant to Section 4.03 hereof (unless all Secured Certificates
then outstanding shall be held by the Owner Trustee or the Owner Participant) or
Lessee or any affiliate of any thereof).

            "Make-Whole Amount" means, with respect to any Secured Certificate,
the amount (as determined by an independent investment banker selected by Lessee
and reasonably acceptable to the Indenture Trustee and the Owner Participant) by
which (a) the present value of the remaining scheduled payments of principal and
interest from the redemption date to maturity of such Secured Certificate
computed by discounting each such payment on a semiannual basis from its
respective Payment Date (assuming a 360-day year of twelve 30-day months) using
a discount rate equal to the Treasury Yield exceeds (b) the outstanding
principal amount of such Secured Certificate plus accrued interest. For purposes
of determining the Make-Whole Amount, "Treasury Yield" at the time of
determination with respect to any Secured Certificate means the interest rate
(expressed as a semiannual equivalent and as a decimal and, in the case of
United States Treasury bills, converted to a bond equivalent yield) determined
to be the per annum rate equal to the semiannual yield to maturity for United
States Treasury securities maturing on the Average Life Date of such Secured
Certificate and trading in the public securities market either as determined by
interpolation between the most recent weekly average yield to maturity for two
series of United States Treasury securities, trading in the public securities
markets, (A) one maturing as close as possible to, but earlier than, the Average
Life Date of such Secured Certificate and (B) the other maturing as close as
possible to, but later than, the Average Life Date of such Secured Certificate,
in each case as published in the most recent H.15(519) or, if a weekly average
yield to maturity for United States Treasury securities maturing on the Average
Life Date of such Secured Certificate is reported on the most recent H.15(519),
such weekly average yield to maturity as published in such H.15(519).
"H.15(519)" means the weekly statistical release designated as such, or any
successor publication, published by the Board of Governors of the Federal
Reserve System. The date of determination of a Make-Whole Amount shall be the
third Business Day prior to the applicable redemption date and the "most recent
H.15(519)" means the H.15(519) published prior to the close of business on the
third Business Day prior to the applicable redemption date.

            "Mortgaged Property" shall have the meaning specified in Section
3.03 hereof.

            "Owner Indemnitee" shall have the meaning specified in the
definition of Excluded Payments herein.

            "Owner Participant" shall mean [______________________________], a
[____________________], so long as such party shall have any interest in the
Trust Estate, and transferees thereof as permitted by Section 8 of the
Participation Agreement.


                                      -9-
<PAGE>

            "Participants" shall mean and include the Loan Participants and the
Owner Participant.

            "Participation Agreement" shall mean that certain Participation
Agreement [NW ____ _], dated as of [_______________], among the Owner Trustee,
the Subordination Agent, the Indenture Trustee, Lessee, the Guarantor, the Owner
Participant and the Purchasers as the same may from time to time be supplemented
or further amended, or the terms thereof waived or modified, to the extent
permitted by, and in accordance with, the terms thereof.

            "Past Due Rate" shall mean, with respect to the Secured
Certificates, the rate per annum equal to 2% over the Debt Rate as in effect
from time to time.

            "Payment Date" shall mean each [March 1 and September 1], commencing
on [March/September _, ____] (or, if any such day is not a Business Day, the
immediately succeeding Business Day) until the Secured Certificates have been
paid in full.

            "Principal Amount" with respect to a Secured Certificate means the
stated original principal amount of such Secured Certificate and, with respect
to all Secured Certificates, means the aggregate stated original principal
amounts of all Secured Certificates.

            "Principal Amount Repayment Date" shall mean each Payment Date on
which any portion of the Principal Amount is due and payable in accordance with
the Amortization Schedule.

            "QIB" shall have the meaning specified in Section 2.08 hereof.

            "Replacement Airframe" shall mean any airframe substituted for the
Airframe pursuant to Section 5.06 hereof.

            "Replacement Engine" shall mean any engine substituted for an Engine
pursuant to Section 5.06 hereof.

            "Responsible Officer" means with respect to the Owner Trustee, a
responsible officer in the Trust Office of the Owner Trustee (including, without
limitation, any authorized officer in the Trust Office of the Owner Trustee),
and with respect to the Indenture Trustee, a responsible officer in the
Corporate Trust Office of the Indenture Trustee.

            "Section 1110 Period" shall have the meaning specified in Section
4.04(a) hereof.

            "Secured Certificates" shall mean and include any Secured
Certificates issued hereunder, and issued in exchange therefor or replacement
thereof.

            "Secured Obligations" shall have the meaning specified in Section
2.06 hereof.

            "Securities Act" shall mean the Securities Act of 1933, as amended.

            "Senior Holder" shall have the meaning specified in Section 2.15(c)
hereof.


                                      -10-
<PAGE>

            "Series A" or "Series A Secured Certificates" means Secured
Certificates issued and designated as "Series A" hereunder, in the Principal
Amount and maturities and bearing interest as specified in Schedule I to the
Trust Indenture under the heading "Series A."

            "Series B" or "Series B Secured Certificates" means Secured
Certificates issued and designated as "Series B" hereunder, in the Principal
Amount and maturities and bearing interest as specified in Schedule I to the
Trust Indenture under the heading "Series B."

            "Series C" or "Series C Secured Certificates" means Secured
Certificates issued and designated as "Series C" hereunder, in the Principal
Amount and maturities and bearing interest as specified in Schedule I to the
Trust Indenture under the heading "Series C."

            "State Street" means State Street Bank and Trust Company, a
Massachusetts trust company, not in its capacity as Indenture Trustee under the
Trust Indenture, but in its individual capacity.

            "Transactions" means the transactions contemplated by the
Participation Agreement and the other Operative Documents.

            "Trust Agreement and Indenture Supplement" shall mean a supplement
to the Trust Agreement and to this Indenture, in substantially the form of
Exhibit A hereto, which shall particularly describe the Aircraft, and any
Replacement Airframe and Replacement Engine included in the property of the
Owner Trustee covered by the Trust Agreement.

            "Trust Indenture", "this Trust Indenture", "the Trust Indenture",
"Indenture", "this Indenture", and "the Indenture" shall mean this Trust
Indenture and Security Agreement [NW ____ _] as it may from time to time be
supplemented or amended as herein provided, including supplementing by the Trust
Agreement and Indenture Supplement pursuant hereto.

            "Trust Indenture Estate" shall mean all estate, right, title and
interest of the Indenture Trustee in and to the properties referred to in the
Granting Clause of this Trust Indenture, excluding Excluded Payments.

            SECTION 1.02. Reference to Other Documents. For all purposes of this
Trust Indenture the terms used but not defined herein are used as defined in the
Lease.

                                   ARTICLE II

                            THE SECURED CERTIFICATES

            SECTION 2.01. Form of Secured Certificates.

            The Secured Certificates shall be substantially in the form set
forth below:

THIS SECURED CERTIFICATE HAS NOT BEEN REGISTERED PURSUANT TO THE SECURITIES ACT
OF 1933, AS AMENDED (THE "ACT"), OR PURSUANT TO THE SECURITIES LAWS OF ANY
STATE. ACCORDINGLY, THIS SECURED CERTIFICATE MAY NOT BE SOLD UNLESS EITHER
REGISTERED UNDER THE ACT AND SUCH


                                      -11-
<PAGE>

APPLICABLE STATE LAWS OR AN EXEMPTION FROM SUCH REGISTRATIONS IS AVAILABLE.

FIRST SECURITY BANK, NATIONAL ASSOCIATION, AS OWNER TRUSTEE UNDER TRUST
AGREEMENT [NW ____ _] DATED AS OF [_______________].

SERIES [___] NON-RECOURSE SECURED CERTIFICATE DUE [_____] ISSUED IN CONNECTION
WITH THE AIRBUS [A320-212] [A319-113] AIRCRAFT BEARING UNITED STATES
REGISTRATION NUMBER N[_____].

No.____                                                          Date:[________]

$__________________

                  INTEREST RATE             MATURITY DATE
                  -------------             -------------

                                               [________]

                                          [________,_______]

            FIRST SECURITY BANK, NATIONAL ASSOCIATION, not in its individual
capacity but solely as Owner Trustee (herein in such capacity called the "Owner
Trustee") under that certain Trust Agreement [NW ____ _], dated as of
[_______________], between the Owner Participant named therein and FSB (herein
as such Trust Agreement may be supplemented or amended from time to time called
the "Trust Agreement"), hereby promises to pay to ___________, or the registered
assignee thereof, the principal sum of $_________ (the "Principal Amount"),
together with interest on the amount of the Principal Amount remaining unpaid
from time to time (calculated on the basis of a year of 360 days comprised of
twelve 30-day months) from the date hereof until paid in full at a rate per
annum equal to the interest rate indicated above. The Principal Amount of this
Secured Certificate shall be payable in installments on the dates set forth in
Schedule I hereto equal to the corresponding percentage of the Principal Amount
of this Secured Certificate set forth in Schedule I hereto. Accrued but unpaid
interest shall be due and payable in semi-annual installments commencing
[March/September 1, _____], and thereafter on [September 1] and [March 1] of
each year, to and including [____________]. Notwithstanding the foregoing, the
final payment made on this Secured Certificate shall be in an amount sufficient
to discharge in full the unpaid Principal Amount and all accrued and unpaid
interest on, and any other amounts due under, this Secured Certificate.
Notwithstanding anything to the contrary contained herein, if any date on which
a payment under this Secured Certificate becomes due and payable is not a
Business Day then such payment shall not be made on such scheduled date but
shall be made on the next succeeding Business Day and if such payment is made on
such next succeeding Business Day, no interest shall accrue on the amount of
such payment during such extension.

            For purposes hereof, the term "Trust Indenture" means the Trust
Indenture and Security Agreement [NW ____ _], dated as of [_______________],
between the Owner Trustee and State Street Bank and Trust Company (the
"Indenture Trustee"), as the same may be amended or supplemented from time to
time. All other capitalized terms used in this Secured


                                      -12-
<PAGE>

Certificate and not defined herein shall have the respective meanings assigned
in the Trust Indenture.

            This Secured Certificate shall bear interest, payable on demand, at
the Past Due Rate (calculated on the basis of a year of 360 days comprised of
twelve 30-day months) on any overdue Principal Amount, any overdue Make-Whole
Amount, if any, and (to the extent permitted by applicable law) any overdue
interest and any other amounts payable hereunder which are overdue, in each case
for the period the same is overdue. Amounts shall be overdue if not paid when
due (whether at stated maturity, by acceleration or otherwise).

            All payments of Principal Amount, interest, Make-Whole Amount, if
any, and other amounts, if any, to be made by the Owner Trustee hereunder and
under the Trust Indenture or the Participation Agreement shall be payable only
from the income and proceeds from the Trust Estate to the extent included in the
Trust Indenture Estate and only to the extent that the Owner Trustee shall have
sufficient income or proceeds from the Trust Estate to the extent included in
the Trust Indenture Estate to enable the Indenture Trustee to make such payments
in accordance with the terms of Section 2.03 and Article III of the Trust
Indenture and each holder hereof, by its acceptance of this Secured Certificate,
agrees that it will look solely to the income and proceeds from the Trust
Indenture Estate to the extent available for distribution to the holder hereof
as above provided and that none of the Owner Participant, the Owner Trustee or
the Indenture Trustee is personally liable or liable in any manner extending to
any assets other than the Trust Indenture Estate to the holder hereof for any
amounts payable or any liability under this Secured Certificate or, except as
provided in the Trust Indenture or in the Participation Agreement, for any
liability under the Trust Indenture or the Participation Agreement; provided,
however, that nothing herein contained shall limit, restrict or impair the right
of the Indenture Trustee, subject always to the terms and provisions of the
Trust Indenture, to accelerate the maturity of this Secured Certificate upon
occurrence of an Event of Default under the Trust Indenture in accordance with
Section 4.04(b) of the Trust Indenture, to bring suit and obtain a judgment
against the Owner Trustee on this Secured Certificate for purposes of realizing
upon the Trust Indenture Estate and to exercise all rights and remedies provided
under the Trust Indenture or otherwise realize upon the Trust Indenture Estate.

            There shall be maintained a Secured Certificate Register for the
purpose of registering transfers and exchanges of Secured Certificates at the
Corporate Trust Office of the Indenture Trustee or at the office of any
successor in the manner provided in Section 2.07 of the Trust Indenture.

            The Principal Amount and interest and other amounts due hereunder
shall be payable in Dollars in immediately available funds at the Corporate
Trust Office of the Indenture Trustee, or as otherwise provided in the Trust
Indenture. Each such payment shall be made on the date such payment is due and
without any presentment or surrender of this Secured Certificate, except that in
the case of any final payment with respect to this Secured Certificate, the
Secured Certificate shall be surrendered promptly thereafter to the Indenture
Trustee for cancellation.

            The holder hereof, by its acceptance of this Secured Certificate,
agrees that, except as provided in the Trust Indenture, each payment received by
it hereunder shall be


                                      -13-
<PAGE>

applied, first, to the payment of accrued interest on this Secured Certificate
(as well as any interest on any overdue Principal Amount, any overdue Make-Whole
Amount, if any, or, to the extent permitted by Law, any overdue interest and
other amounts hereunder) to the date of such payment, second, to the payment of
the Principal Amount of this Secured Certificate then due, third, to the payment
of Make-Whole Amount, if any, and any other amount due hereunder or under the
Trust Indenture, and fourth, the balance, if any, remaining thereafter, to the
payment of Principal Amount of this Secured Certificate remaining unpaid in the
inverse order of their normal maturity.

            This Secured Certificate is one of the Secured Certificates referred
to in the Trust Indenture which have been or are to be issued by the Owner
Trustee pursuant to the terms of the Trust Indenture. The Trust Indenture Estate
is held by the Indenture Trustee as security, in part, for the Secured
Certificates. The provisions of this Secured Certificate are subject to the
Trust Indenture. Reference is hereby made to the Trust Indenture and the
Participation Agreement for a complete statement of the rights and obligations
of the holder of, and the nature and extent of the security for, this Secured
Certificate and the rights and obligations of the holders of, and the nature and
extent of the security for, any other Secured Certificates executed and
delivered under the Trust Indenture, as well as for a statement of the terms and
conditions of the trust created by the Trust Indenture, to all of which terms
and conditions in the Trust Indenture and the Participation Agreement each
holder hereof agrees by its acceptance of this Secured Certificate.

            As provided in the Trust Indenture and subject to certain
limitations therein set forth, this Secured Certificate is exchangeable for a
like aggregate Principal Amount of Secured Certificates of different authorized
denominations, as requested by the holder surrendering the same.

            Prior to due presentment for registration of transfer of this
Secured Certificate, the Owner Trustee and the Indenture Trustee shall treat the
person in whose name this Secured Certificate is registered as the owner hereof
for all purposes whether or not this Secured Certificate be overdue, and neither
of the Owner Trustee nor the Indenture Trustee shall be affected by notice to
the contrary.

            This Secured Certificate is subject to redemption as provided in
Sections 2.10, 2.11 and 2.12 of the Trust Indenture but not otherwise. This
Secured Certificate is also subject to assumption by Lessee as provided in
Section 2.13 of the Trust Indenture, to exchange and to purchase by the Owner
Participant or the Owner Trustee as provided in Section 2.14 of the Trust
Indenture but not otherwise.

            [The indebtedness evidenced by this Secured Certificate is, to the
extent and in the manner provided in the Trust Indenture, subordinate and
subject in right of payment to the prior payment in full of the Secured
Obligations (as defined in the Trust Indenture) in respect of [Series A Secured
Certificates](1) [Series A and Series B Secured Certificates](2), and this
Secured Certificate is issued subject to such provisions. The Certificate Holder
of this Secured

- ----------

(1)   To be inserted in the case of a Series B Secured Certificate.

(2)   To be inserted in the case of a Series C Secured Certificate.


                                      -14-
<PAGE>

Certificate, by accepting the same, (a) agrees to and shall be bound by such
provisions, (b) authorizes and directs the Indenture Trustee on his behalf to
take such action as may be necessary or appropriate to effectuate the
subordination as provided in the Trust Indenture and (c) appoints the Indenture
Trustee his attorney-in-fact for such purpose.]**

            Unless the certificate of authentication hereon has been executed by
or on behalf of the Indenture Trustee by manual signature, this Secured
Certificate shall not be entitled to any benefit under the Trust Indenture or be
valid or obligatory for any purpose.

            THIS SECURED CERTIFICATE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

                                    *   *   *

- ----------

**    To be inserted for each Secured Certificate other than any Series A
      Secured Certificate.


                                      -15-
<PAGE>

            IN WITNESS WHEREOF, the Owner Trustee has caused this Secured
Certificate to be executed in its corporate name by its officer thereunto duly
authorized on the date hereof.

                                        FIRST SECURITY BANK,
                                        NATIONAL ASSOCIATION,

                                          not in its individual capacity but
                                          solely as Owner Trustee

                                          By
                                             -----------------------------------
                                             Name:
                                             Title:

                INDENTURE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

      This is one of the Secured Certificates referred to in the
within-mentioned Trust Indenture.

                                        STATE STREET BANK AND TRUST COMPANY,

                                          not in its individual capacity but
                                          solely as Indenture Trustee

                                          By
                                             -----------------------------------
                                             Name:
                                             Title:


                                      -16-
<PAGE>

                                   SCHEDULE I

                        SECURED CERTIFICATES AMORTIZATION

                                                        Percentage of
                                                      Principal Amount
                  Payment Date                            to be Paid
            ------------------------            ----------------------------

                       [SEE SCHEDULE I TO TRUST INDENTURE
                        WHICH IS INSERTED UPON ISSUANCE]

                                    *   *   *

            SECTION 2.02. Issuance and Terms of Secured Certificates.

            The Secured Certificates shall be dated the date of issuance
thereof, shall be issued in three separate series consisting of Series A, Series
B and Series C and in the maturities and principal amounts and shall bear
interest as specified in Schedule I hereto. On the Delivery Date, each Secured
Certificate shall be issued to the Pass Through Trustees (or their designee)
under the Pass Through Agreements as set forth in Schedule II hereto. The
Secured Certificates shall be issued in registered form only. The Secured
Certificates shall be issued in denominations of $1,000 and integral multiples
thereof, except that one Secured Certificate of each Series may be in an amount
that is not an integral multiple of $1,000.

            Each Secured Certificate shall bear interest at the Debt Rate
(calculated on the basis of a year of 360 days comprised of twelve 30-day
months) on the unpaid Principal Amount thereof from time to time outstanding,
payable in arrears on [March/September 1, ____], and on each [September 1] and
[March 1] thereafter until maturity. The Principal Amount of each Secured
Certificate shall be payable on the dates and in the installments equal to the
corresponding percentage of the Principal Amount as set forth in Schedule I
hereto which shall be attached as Schedule I to the Secured Certificates.
Notwithstanding the foregoing, the final payment made under each Secured
Certificate shall be in an amount sufficient to discharge in full the unpaid
Principal Amount and all accrued and unpaid interest on, and any other amounts
due under, such Secured Certificate. Each Secured Certificate shall bear
interest at the Past Due Rate (calculated on the basis of a year of 360 days
comprised of twelve 30-day months) on any part of the Principal Amount,
Make-Whole Amount, if any, and to the extent permitted by applicable law,
interest and any other amounts payable thereunder not paid when due for any
period during which the same shall be overdue, in each case for the period the
same is overdue. Amounts shall be overdue if not paid when due (whether at
stated maturity, by acceleration or otherwise). Notwithstanding anything to the
contrary contained herein, if any date on which a payment under any Secured
Certificate becomes due and payable is not a Business Day then such payment
shall not be made on such scheduled date but shall be made on the next
succeeding Business Day and if such payment is made on such next succeeding


                                      -17-
<PAGE>

Business Day, no interest shall accrue on the amount of such payment during such
extension.

            The Owner Trustee agrees to pay to the Indenture Trustee for
distribution in accordance with Section 3.04 hereof (a) any and all indemnity
amounts received by the Owner Trustee which are payable by Lessee to (i) the
Indenture Trustee in its individual capacity, (ii) the Certificate Holders,
(iii) the Subordination Agent, (iv) the Liquidity Provider, or (v) the Pass
Through Trustees, in each case pursuant to Section 7 of the Participation
Agreement, (b) Owner Trustee's pro rata share of all amounts owed to the
Liquidity Provider by the Subordination Agent under each Liquidity Facility
other than amounts due as (i) repayments of the principal of advances
thereunder, (ii) interest on Interest Drawings, Final Drawings, and Applied
Downgrade Advances and Applied Non-Extension Advances (as defined in the
Liquidity Facilities) under any Liquidity Facility except to the extent included
in Net Interest and Related Charges, and (iii) fees payable to the Liquidity
Provider payable (whether or not in fact paid) under Section 7(a) of the Note
Purchase Agreement (as originally in effect or amended, with the consent of the
Owner Participant), and (c) any and all amounts received by the Owner Trustee
which are payable by Lessee under clause (c) or (d) of the definition of
Supplemental Rent. As used in this Section, "Owner Trustee's pro rata share"
means as of any time:

            (A) with respect to all amounts other than Net Interest and Related
      Charges, a fraction the numerator of which is the aggregate principal
      balance then outstanding of the Secured Certificates and the denominator
      of which is the aggregate principal balance then outstanding of all
      Equipment Notes, plus

            (B) with respect to all Net Interest and Related Charges (x) if
      there exists a Payment Default under any Secured Certificate a fraction,
      the numerator of which is the aggregate principal balance then outstanding
      of the Secured Certificates and the denominator of which is the aggregate
      principal balance then outstanding of all Equipment Notes issued under
      Indentures under which there exists a Payment Default or (y) at all other
      times, zero.

As used in this Section, "Net Interest and Related Charges" means the sum of (i)
the amount, if any, by which interest payable to the Liquidity Provider on any
Interest Drawing, Final Drawing, Applied Downgrade Advance and/or Applied
Non-Extension Advance (as defined in the Liquidity Facilities) exceeds the
amount which would be payable if such drawings bore interest at the Designated
Interest Rate plus (ii) any amounts payable under Section 3.1, Section 3.2,
Section 3.3 or Section 7.7 of each Liquidity Facility (or similar provisions of
any succeeding Liquidity Facility) which result from any Interest Drawing, Final
Drawing, Applied Downgrade Advance or Applied Non-Extension Advance (as defined
in the Liquidity Facilities). As used in this Section "Designated Interest Rate"
means the weighted average Past Due Rate (as defined in the applicable
Indentures) except with respect to that portion of any Final Drawing (or Applied
Downgrade Advance or Applied Non-Extension Advance which becomes a Final
Drawing) which remains in a Cash Collateral Account, Designated Interest Rate
means the weighted average Investment Earnings of funds in the Cash Collateral
Accounts. As used in this Section, a Payment Default when used in connection
with a Secured Certificate or Equipment Note means a default in the payment of
principal thereof or interest thereon which has not been cured other than solely
because of acceleration. The following terms are used in this Section as defined
in


                                      -18-
<PAGE>

the Intercreditor Agreement without regard to any amendment, modification or
supplement thereto after the Closing Date: Cash Collateral Accounts, Equipment
Notes, Final Drawing, Indentures, Interest Drawing and Investment Earnings.

            The Secured Certificates shall be executed on behalf of the Owner
Trustee by its President or one of its Vice Presidents, Assistant Vice
Presidents or Assistant Secretaries or other authorized officer. Secured
Certificates bearing the signatures of individuals who were at any time the
proper officers of the Owner Trustee shall bind the Owner Trustee,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Secured Certificates or
did not hold such offices at the respective dates of such Secured Certificates.
The Owner Trustee may from time to time execute and deliver Secured Certificates
with respect to the Aircraft to the Indenture Trustee for authentication upon
original issue and such Secured Certificates shall thereupon be authenticated
and delivered by the Indenture Trustee upon the written request of the Owner
Trustee signed by a Vice President or Assistant Vice President or other
authorized officer of the Owner Trustee; provided, however, that each such
request shall specify the aggregate Principal Amount of all Secured Certificates
to be authenticated hereunder on original issue with respect to the Aircraft. No
Secured Certificate shall be secured by or entitled to any benefit under this
Trust Indenture or be valid or obligatory for any purposes, unless there appears
on such Secured Certificate a certificate of authentication in the form provided
for herein executed by the Indenture Trustee by the manual signature of one of
its authorized officers and such certificate upon any Secured Certificates shall
be conclusive evidence, and the only evidence, that such Secured Certificate has
been duly authenticated and delivered hereunder.

            SECTION 2.03. Payments from Trust Indenture Estate Only.

            (a) Without impairing any of the other rights, powers, remedies,
privileges, liens or security interests of the Certificate Holders under this
Trust Indenture, each Certificate Holder, by its acceptance of a Secured
Certificate, agrees that as between it and the Owner Trustee, except as
expressly provided in this Trust Indenture, the Participation Agreement or any
other Operative Document, (i) the obligation to make all payments of the
Principal Amount of, interest on, Make-Whole Amount, if any, and all other
amounts due with respect to the Secured Certificates, and the performance by the
Owner Trustee of every obligation or covenant contained in this Trust Indenture
and in the Participation Agreement or any of the other Operative Documents,
shall be payable only from the income and proceeds from the Trust Estate to the
extent included in the Trust Indenture Estate and only to the extent that the
Owner Trustee shall have sufficient income or proceeds from the Trust Estate to
the extent included in the Trust Indenture Estate to enable the Indenture
Trustee to make such payments in accordance with the terms of Article III
hereof, and all of the statements, representations, covenants and agreements
made by the Owner Trustee (when made in such capacity) contained in this Trust
Indenture and any agreement referred to herein other than the Trust Agreement,
unless expressly otherwise stated, are made and intended only for the purpose of
binding the Trust Estate and establishing the existence of rights and remedies
which can be exercised and enforced against the Trust Estate; therefore,
anything contained in this Trust Indenture or such other agreements to the
contrary notwithstanding (except for any express provisions or representations
that the Owner Trustee is responsible for, or is making, in its individual
capacity, for which there would be personal liability of the Owner Trustee), no
recourse shall be had with respect to this Trust


                                      -19-
<PAGE>

Indenture or such other agreements against the Owner Trustee in its individual
capacity or against any institution or person which becomes a successor trustee
or co-trustee or any officer, director, trustee, servant or direct or indirect
parent or controlling Person or Persons of any of them, and (ii) none of the
Owner Trustee, in its individual capacity, the Owner Participant, the Indenture
Trustee and any officer, director, trustee, servant, employee, agent or direct
or indirect parent or controlling Person or Persons of any of them shall have
any personal liability for any amounts payable, or other obligation owed,
hereunder, under the Participation Agreement or any of the other Operative
Documents or under the Secured Certificates except as expressly provided herein
or in the Participation Agreement; provided, however, that nothing contained in
this Section 2.03(a) shall be construed to limit the exercise and enforcement in
accordance with the terms of this Trust Indenture or such other agreements of
rights and remedies against the Trust Estate. These provisions are not intended
as any release or discharge of the indebtedness represented by the Secured
Certificates and the Trust Indenture, but are intended only as a covenant not to
sue the Owner Participant, the Owner Trustee or the Indenture Trustee in their
individual capacities, except as expressly provided herein or in the
Participation Agreement, for a deficiency with respect to such indebtedness, the
indebtedness represented by this Trust Indenture and the Secured Certificates to
remain in full force and effect as fully as though these provisions were not
contained in this Trust Indenture. The Owner Trustee hereby acknowledges that
the Certificate Holders have expressly reserved all their rights and remedies
against the Trust Indenture Estate, including the right, in the event of a
default in the payment of all or part of the Principal Amount of, interest on,
Make-Whole Amount, if any, or any other amount due with respect to any Secured
Certificate within the periods provided for in Section 4.02(b) hereof, or upon
the occurrence and continuation of any other Event of Default under this Trust
Indenture, to foreclose upon this Trust Indenture, and/or to receive the
proceeds from the Trust Indenture Estate and otherwise to enforce any other
right under this Trust Indenture. Nothing in this Section 2.03(a) shall (x)
release the Owner Participant from personal liability, or constitute a covenant
not to sue the Owner Participant, for any breach by it of any of its covenants,
representations or warranties contained in the Participation Agreement or for
any of the payments it has agreed to make pursuant to the Participation
Agreement or (y) release the Owner Trustee or constitute a covenant not to sue
the Owner Trustee for any breach by it of any representations, warranties or
covenants of the Owner Trustee contained in the Operative Documents or (z)
release the Owner Trustee in its individual capacity from personal liability, or
constitute a covenant not to sue the Owner Trustee in its individual capacity
for any breach by it of any representations, warranties or covenants of the
Owner Trustee made in its individual capacity in the Operative Documents.

            (b) If (i) all or any part of the Trust Estate becomes the property
of, or the Owner Trustee or Owner Participant becomes, a debtor subject to the
reorganization provisions of the Bankruptcy Code, (ii) pursuant to such
reorganization provisions, including Section 1111(b) of the Bankruptcy Code, the
Owner Trustee (in its individual capacity) or the Owner Participant is required,
by reason of the Owner Trustee (in its individual capacity) or the Owner
Participant being held to have recourse liability to any Certificate Holder or
the Indenture Trustee, directly or indirectly (other than the recourse liability
of the Owner Trustee (in its


                                      -20-
<PAGE>

individual capacity), to make payment on account of any amount payable as
principal, Make-Whole Amount, if any, interest or other amounts on the Secured
Certificates or under this Indenture and (iii) any Certificate Holder or the
Indenture Trustee actually receives any Excess Amount (as hereinafter defined)
which reflects any payment by the Owner Trustee (in its individual capacity) or
the Owner Participant on account of clause (ii) above, then such Certificate
Holder or the Indenture Trustee, as the case may be, shall promptly refund to
the Owner Trustee (in its individual capacity) or the Owner Participant
(whichever shall have made such payment) such Excess Amount.

            For purposes of this Section 2.03(b), "Excess Amount" means the
amount by which such payment exceeds the amount that would have been received by
a Certificate Holder or the Indenture Trustee if the Owner Trustee (in its
individual capacity) or the Owner Participant had not become subject to the
recourse liability referred to in clause (ii) above. Nothing contained in this
Section 2.03(b) shall prevent a Certificate Holder or the Indenture Trustee from
enforcing any personal recourse obligation (and retaining the proceeds thereof)
of the Owner Trustee (in its individual capacity) or the Owner Participant under
the Participation Agreement or this Trust Indenture (and any exhibits or annexes
hereto or thereto) or by separate agreement or from retaining any amount paid by
Owner Participant under Section 2.14 or 4.03 hereof.

            SECTION 2.04. Method of Payment.

            (a) The Principal Amount of, interest on, Make-Whole Amount, if any,
and other amounts due under each Secured Certificate or hereunder will be
payable in Dollars by wire transfer of immediately available funds not later
than 12:00 noon, New York City time, on the due date of payment to the Indenture
Trustee at the Corporate Trust Office for distribution among the Certificate
Holders in the manner provided herein. The Owner Trustee shall not have any
responsibility for the distribution of such payment to any Certificate Holder.
Notwithstanding the foregoing or any provision in any Secured Certificate to the
contrary, the Indenture Trustee will use reasonable efforts to pay or cause to
be paid, if so directed in writing by any Certificate Holder (with a copy to the
Owner Trustee), all amounts paid by the Owner Trustee hereunder and under such
holder's Secured Certificate or Secured Certificates to such holder or a nominee
therefor (including all amounts distributed pursuant to Article III of this
Trust Indenture) by transferring, or causing to be transferred, by wire transfer
of immediately available funds in Dollars, prior to 2:00 p.m., New York City
time, on the due date of payment, to an account maintained by such holder with a
bank located in the continental United States the amount to be distributed to
such holder, for credit to the account of such holder maintained at such bank.
If the Indenture Trustee shall fail to make any such payment as provided in the
immediately preceding sentence after its receipt of funds at the place and prior
to the time specified above, the Indenture Trustee, in its individual capacity
and not as trustee, agrees to compensate such holders for loss of use of funds
at the Debt Rate until such payment is made and the Indenture Trustee shall be
entitled to any interest earned on such funds until such payment is made. Any
payment made hereunder shall be made without any presentment or surrender of any
Secured Certificate, except that, in the case of the final payment in respect of
any Secured Certificate, such Secured Certificate shall be surrendered to the
Indenture Trustee for cancellation promptly after such payment. Notwithstanding
any other provision of this Trust Indenture to the contrary, the Indenture
Trustee shall not be required to make, or cause to be made, wire transfers as
aforesaid prior to the first Business Day on which it is practicable for the
Indenture Trustee to do so in view of the time of day when the funds to be so
transferred were received by it if such funds were received after 12:00 noon,
New York City time, at the place of payment. Prior to the due presentment for
registration of transfer of any Secured Certificate, the


                                      -21-
<PAGE>

Owner Trustee and the Indenture Trustee shall deem and treat the Person in whose
name any Secured Certificate is registered on the Secured Certificate Register
as the absolute owner and holder of such Secured Certificate for the purpose of
receiving payment of all amounts payable with respect to such Secured
Certificate and for all other purposes, and none of the Owner Trustee or the
Indenture Trustee shall be affected by any notice to the contrary. So long as
any signatory to the Participation Agreement or nominee thereof shall be a
registered Certificate Holder, all payments to it shall be made to the account
of such Certificate Holder specified in Schedule I thereto and otherwise in the
manner provided in or pursuant to the Participation Agreement unless it shall
have specified some other account or manner of payment by notice to the
Indenture Trustee consistent with this Section 2.04.

            (b) The Indenture Trustee, as agent for the Owner Trustee, shall
exclude and withhold at the appropriate rate from each payment of Principal
Amount of, interest on, Make-Whole Amount, if any, and other amounts due
hereunder or under each Secured Certificate (and such exclusion and withholding
shall constitute payment in respect of such Secured Certificate) any and all
United States withholding taxes applicable thereto as required by Law. The
Indenture Trustee agrees to act as such withholding agent and, in connection
therewith, whenever any present or future United States taxes or similar charges
are required to be withheld with respect to any amounts payable hereunder or in
respect of the Secured Certificates, to withhold such amounts (and such
withholding shall constitute payment in respect of such Secured Certificate) and
timely pay the same to the appropriate authority in the name of and on behalf of
the Certificate Holders, that it will file any necessary United States
withholding tax returns or statements when due, and that as promptly as possible
after the payment thereof it will deliver to each Certificate Holder (with a
copy to the Owner Trustee and Lessee) appropriate receipts showing the payment
thereof, together with such additional documentary evidence as any such
Certificate Holder may reasonably request from time to time.

            If a Certificate Holder which is a Non-U.S. Person has furnished to
the Indenture Trustee a properly completed and currently effective U.S. Internal
Revenue Service Form 1001 or W-8 (or such successor form or forms as may be
required by the United States Treasury Department) during the calendar year in
which the payment hereunder or under the Secured Certificate(s) held by such
holder is made (but prior to the making of such payment), or in either of the
two preceding calendar years, and has not notified the Indenture Trustee of the
withdrawal or inaccuracy of such form prior to the date of such payment (and the
Indenture Trustee has no reason to know that any information set forth in such
form is inaccurate), the Indenture Trustee shall withhold only the amount, if
any, required by Law (after taking into account any applicable exemptions
claimed by the Certificate Holder) to be withheld from payments hereunder or
under the Secured Certificates held by such holder in respect of United States
federal income tax (and such withholding shall constitute payment in respect of
such Secured Certificate). If a Certificate Holder (x) which is a Non-U.S.
Person has furnished to the Indenture Trustee a properly completed and currently
effective U.S. Internal Revenue Service Form 4224 in duplicate (or such
successor certificate, form or forms as may be required by the United States
Treasury Department as necessary in order to avoid withholding of United States
federal income tax), during the calendar year in which the payment is made (but
prior to the making of such payment), and has not notified the Indenture Trustee
of the withdrawal or inaccuracy of such certificate or form prior to the date of
such payment (and the Indenture Trustee has no reason to know that any
information set forth in such form is inaccurate) or (y) which is a U.S. Person
has


                                      -22-
<PAGE>

furnished to the Indenture Trustee a properly completed and currently effective
U.S. Internal Revenue Service Form W-9, if applicable, prior to a payment
hereunder or under the Secured Certificates held by such holder, no amount shall
be withheld from payments in respect of United States federal income tax. If any
Certificate Holder has notified the Indenture Trustee that any of the foregoing
forms or certificates is withdrawn or inaccurate, or if such holder has not
filed a form claiming an exemption from United States withholding tax or if the
Code or the regulations thereunder or the administrative interpretation thereof
are at any time after the date hereof amended to require such withholding of
United States federal income taxes from payments under the Secured Certificates
held by such holder, the Indenture Trustee agrees to withhold from each payment
due to the relevant Certificate Holder withholding taxes at the appropriate rate
under Law and will, on a timely basis as more fully provided above, deposit such
amounts with an authorized depository and make such returns, statements,
receipts and other documentary evidence in connection therewith as required by
applicable law.

            Neither the Owner Participant nor the Owner Trustee shall be liable
for the failure of the Indenture Trustee to withhold taxes in the manner
provided for herein or if any Certificate Holder provides false or inaccurate
information on any form required to be delivered under this Section 2.04.

            SECTION 2.05. Application of Payments.

            In the case of each Secured Certificate, each payment of Principal
Amount, Make-Whole Amount, if any, and interest or other amounts due thereon
shall be applied:

            First: to the payment of accrued interest on such Secured
      Certificate (as well as any interest on any overdue Principal Amount, any
      overdue Make-Whole Amount, if any, and to the extent permitted by Law, any
      overdue interest and any other overdue amounts thereunder) to the date of
      such payment;

            Second: to the payment of the Principal Amount of such Secured
      Certificate (or a portion thereof) then due thereunder;

            Third: to the payment of Make-Whole Amount, if any, and any other
      amount due hereunder or under such Secured Certificate; and

            Fourth: the balance, if any, remaining thereafter, to the payment of
      the Principal Amount of such Secured Certificate remaining unpaid
      (provided that such Secured Certificate shall not be subject to redemption
      except as provided in Sections 2.10, 2.11 and 2.12 hereof).

The amounts paid pursuant to clause "Fourth" above shall be applied to the
installments of Principal Amount of such Secured Certificate in the inverse
order of their normal maturity.

            SECTION 2.06. Termination of Interest in Trust Indenture Estate.

            A Certificate Holder shall not, as such, have any further interest
in, or other right with respect to, the Trust Indenture Estate when and if the
Principal Amount of, Make-Whole Amount, if any, and interest on and other
amounts due under all Secured Certificates held by


                                      -23-
<PAGE>

such Certificate Holder and all other sums then payable to such Certificate
Holder hereunder and under the other Operative Documents by the Owner Trustee
(collectively, the "Secured Obligations") shall have been paid in full.

            SECTION 2.07. Registration, Transfer and Exchange of Secured
Certificates.

            The Indenture Trustee shall keep a register (the "Secured
Certificate Register") in which the Indenture Trustee shall provide for the
registration of Secured Certificates and the registration of transfers of
Secured Certificates. No such transfer shall be given effect unless and until
registration hereunder shall have occurred. The Secured Certificate Register
shall be kept at the Corporate Trust Office of the Indenture Trustee. The
Indenture Trustee is hereby appointed "Secured Certificate Registrar" for the
purpose of registering Secured Certificates and transfers of Secured
Certificates as herein provided. A holder of any Secured Certificate intending
to exchange such Secured Certificate shall surrender such Secured Certificate to
the Indenture Trustee at the Corporate Trust Office, together with a written
request from the registered holder thereof for the issuance of a new Secured
Certificate, specifying, in the case of a surrender for transfer, the name and
address of the new holder or holders. Upon surrender for registration of
transfer of any Secured Certificate, the Owner Trustee shall execute, and the
Indenture Trustee shall authenticate and deliver, in the name of the designated
transferee or transferees, one or more new Secured Certificates of a like
aggregate Principal Amount and of the same series. At the option of the
Certificate Holder, Secured Certificates may be exchanged for other Secured
Certificates of any authorized denominations of a like aggregate Principal
Amount, upon surrender of the Secured Certificates to be exchanged to the
Indenture Trustee at the Corporate Trust Office. Whenever any Secured
Certificates are so surrendered for exchange, the Owner Trustee shall execute,
and the Indenture Trustee shall authenticate and deliver, the Secured
Certificates which the Certificate Holder making the exchange is entitled to
receive. All Secured Certificates issued upon any registration of transfer or
exchange of Secured Certificates (whether under this Section 2.07 or under
Section 2.08 hereof or otherwise under this Trust Indenture) shall be the valid
obligations of the Owner Trustee evidencing the same respective obligations, and
entitled to the same security and benefits under this Trust Indenture, as the
Secured Certificates surrendered upon such registration of transfer or exchange.
Every Secured Certificate presented or surrendered for registration of transfer,
shall (if so required by the Indenture Trustee) be duly endorsed, or be
accompanied by a written instrument of transfer in form satisfactory to the
Indenture Trustee duly executed by the Certificate Holder or such holder's
attorney duly authorized in writing, and the Indenture Trustee shall require
evidence satisfactory to it as to the compliance of any such transfer with the
Securities Act, and the securities Laws of any applicable state. The Indenture
Trustee shall make a notation on each new Secured Certificate of the amount of
all payments of Principal Amount previously made on the old Secured Certificate
or Secured Certificates with respect to which such new Secured Certificate is
issued and the date to which interest on such old Secured Certificate or Secured
Certificates has been paid. Interest shall be deemed to have been paid on such
new Secured Certificate to the date on which interest shall have been paid on
such old Secured Certificate, and all payments of the Principal Amount marked on
such new Secured Certificate, as provided above, shall be deemed to have been
made thereon. The Owner Trustee shall not be required to exchange any
surrendered Secured Certificates as provided above during the ten-day period
preceding the due date of any payment on such Secured Certificate. The Owner
Trustee shall in


                                      -24-
<PAGE>

all cases deem the Person in whose name any Secured Certificate shall have been
issued and registered as the absolute owner and holder of such Secured
Certificate for the purpose of receiving payment of all amounts payable by the
Owner Trustee with respect to such Secured Certificate and for all purposes
until a notice stating otherwise is received from the Indenture Trustee and such
change is reflected on the Secured Certificate Register. The Indenture Trustee
will promptly notify the Owner Trustee, the Owner Participant and Lessee of each
registration of a transfer of a Secured Certificate. Any such transferee of a
Secured Certificate, by its acceptance of a Secured Certificate, agrees to the
provisions of the Participation Agreement applicable to Certificate Holders,
including Sections 6, 8(c), 8(e), 8(k), 8(l), 8(q), 8(r), 8(t), 8(cc), 10,
13(b), 13(c), 15(b) and 15(c), and shall be deemed to have represented and
warranted (except as provided above), and covenanted, to the parties to the
Participation Agreement as to the matters represented, warranted and covenanted
by the Purchasers in the Participation Agreement. Subject to compliance by the
Certificate Holder and its transferee (if any) of the requirements set forth in
this Section 2.07, the Indenture Trustee and the Owner Trustee shall use all
reasonable efforts to issue new Secured Certificates upon transfer or exchange
within 10 Business Days of the date a Secured Certificate is surrendered for
transfer or exchange.

            SECTION 2.08. Mutilated, Destroyed, Lost or Stolen Secured
Certificates.

            If any Secured Certificate shall become mutilated, destroyed, lost
or stolen, the Owner Trustee shall, upon the written request of the holder of
such Secured Certificate, execute and the Indenture Trustee shall authenticate
and deliver in replacement thereof a new Secured Certificate, payable in the
same Principal Amount dated the same date and captioned as issued in connection
with the Aircraft. If the Secured Certificate being replaced has become
mutilated, such Secured Certificate shall be surrendered to the Indenture
Trustee and a photocopy thereof shall be furnished to the Owner Trustee. If the
Secured Certificate being replaced has been destroyed, lost or stolen, the
holder of such Secured Certificate shall furnish to the Owner Trustee, the Owner
Participant and the Indenture Trustee such security or indemnity as may be
required by them to save the Owner Trustee, the Owner Participant and the
Indenture Trustee harmless and evidence satisfactory to the Owner Trustee, the
Owner Participant and the Indenture Trustee of the destruction, loss or theft of
such Secured Certificate and of the ownership thereof. If a "qualified
institutional buyer" of the type referred to in paragraph (a)(l)(i)(A), (B), (D)
or (E) of Rule 144A under the Securities Act (a "QIB") is the holder of any such
destroyed, lost or stolen Secured Certificate, then the written indemnity of
such QIB, signed by an authorized officer thereof, in favor of, delivered to and
in form reasonably satisfactory to Lessee, the Owner Participant, the Owner
Trustee and the Indenture Trustee shall be accepted as satisfactory indemnity
and security and no further indemnity or security shall be required as a
condition to the execution and delivery of such new Secured Certificate. Subject
to compliance by the Certificate Holder of the requirements set forth in this
Section 2.08, the Indenture Trustee and the Owner Trustee shall use all
reasonable efforts to issue new Secured Certificates within 10 Business Days of
the date of the written request therefor from the Certificate Holder.

            SECTION 2.09. Payment of Expenses on Transfer; Cancellation.

            (a) No service charge shall be made to a Certificate Holder for any
registration of transfer or exchange of Secured Certificates, but the Indenture
Trustee, as Secured Certificate Registrar, may require payment of a sum
sufficient to cover any tax or other


                                      -25-
<PAGE>

governmental charge that may be imposed in connection with any registration of
transfer or exchange of Secured Certificates.

            (b) The Indenture Trustee shall cancel all Secured Certificates
surrendered for replacement, redemption, transfer, exchange, payment or
cancellation and shall destroy the canceled Secured Certificates.

            SECTION 2.10. Mandatory Redemptions of Secured Certificates.

            (a) On the date on which Lessee is required pursuant to Section
10(a)(i) of the Lease to make payment for an Event of Loss with respect to the
Aircraft, all of the Secured Certificates shall be redeemed in whole at a
redemption price equal to 100% of the unpaid Principal Amount thereof, together
with all accrued interest thereon to the date of redemption and all other
amounts payable hereunder or under the Participation Agreement to the
Certificate Holders but without Make-Whole Amount.

            (b) If the Lease is terminated with respect to the Aircraft by
Lessee pursuant to Section 9 or Section 19(d) thereof and Lessee shall not have
assumed all of the obligations of the Owner Trustee hereunder pursuant to
Section 2.13 and to Section 8(x) of the Participation Agreement, on the date the
Lease is so terminated all the Secured Certificates shall be redeemed in whole
at a redemption price equal to 100% of the unpaid Principal Amount thereof,
together with accrued interest thereon to the date of redemption and all other
amounts payable hereunder or under the Participation Agreement to the
Certificate Holders plus Make-Whole Amount, if any.

            SECTION 2.11. Voluntary Redemptions of Secured Certificates.

            Any or all of the Secured Certificates may be redeemed by the Owner
Trustee in connection with a transaction described in, and subject to the terms
and conditions of, Section 17 of the Participation Agreement upon at least 30
days' revocable prior written notice to the Indenture Trustee and the
Certificate Holders, and the Secured Certificates shall, as provided in Section
17 of the Participation Agreement, be redeemed in whole at a redemption price
equal to 100% of the unpaid Principal Amount thereof, together with accrued
interest thereon to the date of redemption and all other amounts payable
hereunder or under the Participation Agreement to the Certificate Holders plus
Make-Whole Amount, if any.

            SECTION 2.12. Redemptions; Notice of Redemption.

            (a) Neither any redemption of any Secured Certificate nor any
purchase by the Owner Trustee of any Secured Certificate may be made except to
the extent and in the manner expressly permitted by this Trust Indenture. No
purchase of any Secured Certificate may be made by the Indenture Trustee.

            (b) Notice of redemption or purchase with respect to the Secured
Certificates shall be given by the Indenture Trustee by first-class mail,
postage prepaid, mailed not less than 15 nor more than 60 days prior to the
applicable redemption date, to each Certificate Holder of such Secured
Certificates to be redeemed or purchased, at such Certificate Holder's address
appearing in the Secured Certificate Register; provided that, in the case of a
redemption to be


                                      -26-
<PAGE>

made pursuant to Section 2.10(b) or Section 2.11, such notice shall be revocable
and shall be deemed revoked in the event that the Lease does not in fact
terminate on the specified termination date or if notice of such redemption
shall have been given in connection with a refinancing of Secured Certificates
and the Indenture Trustee receives written notice of such revocation from Lessee
or the Owner Trustee not later than three days prior to the redemption date. All
notices of redemption shall state: (1) the redemption date, (2) the applicable
basis for determining the redemption price, (3) that on the redemption date, the
redemption price will become due and payable upon each such Secured Certificate,
and that, if any such Secured Certificates are then outstanding, interest on
such Secured Certificates shall cease to accrue on and after such redemption
date, and (4) the place or places where such Secured Certificates are to be
surrendered for payment of the redemption price.

            (c) On or before the redemption date, the Owner Trustee (or any
person on behalf of the Owner Trustee) shall, to the extent an amount equal to
the redemption price for the Secured Certificates to be redeemed or purchased on
the redemption date shall not then be held in the Trust Indenture Estate,
deposit or cause to be deposited with the Indenture Trustee by 12:00 noon on the
redemption date in immediately available funds the redemption price of the
Secured Certificates to be redeemed or purchased.

            (d) Notice of redemption or purchase having been given as aforesaid
(and not deemed revoked as contemplated in the proviso to Section 2.12(b)), the
Secured Certificates to be redeemed or purchased shall, on the redemption date,
become due and payable at the Corporate Trust Office of the Indenture Trustee or
at any office or agency maintained for such purposes pursuant to Section 2.07,
and from and after such redemption date (unless there shall be a default in the
payment of the redemption price) any such Secured Certificates then outstanding
shall cease to bear interest. Upon surrender of any such Secured Certificate for
redemption or purchase in accordance with said notice, such Secured Certificate
shall be redeemed at the redemption price. If any Secured Certificate called for
redemption or purchase shall not be so paid upon surrender thereof for
redemption, the principal amount thereof shall, until paid, continue to bear
interest from the applicable redemption date at the interest rate in effect for
such Secured Certificate as of such redemption date.

            SECTION 2.13. Assumption of Secured Certificates by Lessee.

            If, in accordance with Section 8(x) of the Participation Agreement,
and subject to the provisions of Section 8(o) thereof, Lessee shall assume (on a
full recourse basis) all of the obligations of the Owner Trustee hereunder,
under the Secured Certificates and all other Operative Documents by supplemental
indenture satisfactory to the Indenture Trustee (which shall contain (i) the
provisions substantially similar to Sections 6, 7, 8, 10, 11 and 12 of the Lease
and (ii) other provisions necessary or advisable to effectuate such assumption),
then upon delivery of such supplemental indenture, payment by Lessee of all
expenses (including reasonable fees and expenses of counsel) for the Owner
Trustee and the Owner Participant, delivery by the Guarantor of a guarantee of
the Secured Certificates and other amounts owing to the Certificate Holders
substantially in the form of the Guarantee, and delivery of an opinion of
counsel for Lessee that such assumption has been duly and validly effected, the
Owner Trustee shall be released and discharged from any further obligations
hereunder and under the Secured Certificates and all other Operative Documents
and the Owner Participant shall be released and


                                      -27-
<PAGE>

discharged from any further obligations under the Participation Agreement and
any other Operative Document to which it is a party, except with respect to any
such obligations that accrued prior thereto.

            SECTION 2.14. Option to Purchase Secured Certificates.

            Either the Owner Trustee or the Owner Participant may, upon the
events and subject to the terms and conditions and for the price set forth in
this Section 2.14, purchase all but not less than all of the Secured
Certificates outstanding hereunder, and each Certificate Holder agrees that it
will, upon such events and subject to such terms and conditions and upon receipt
of such price, sell, assign, transfer and convey to such purchaser or its
nominee (without recourse or warranty of any kind except as to its title to the
Secured Certificates and except against Liens on such Secured Certificates
arising by, through or under such holder), all of the right, title and interest
of such Certificate Holder in and to the Trust Indenture Estate, this Trust
Indenture and the Secured Certificates held by it, and such purchaser or its
nominee shall assume all of such holder's obligations under the Participation
Agreement and hereunder.

            Such option to purchase the Secured Certificates may be exercised by
the Owner Trustee or the Owner Participant upon any of the following events,
and, in any such event, the purchase price thereof shall equal for each Secured
Certificate the aggregate unpaid Principal Amount thereof, plus accrued and
unpaid interest thereon to the date of purchase and all other amounts (other
than the Make-Whole Amount, except as provided in the next sentence) then
payable hereunder or under the Participation Agreement to the holder thereof.
Such option to purchase the Secured Certificates may be exercised: (i) upon an
Indenture Trustee Event or (ii) in the event there shall have occurred and be
continuing a Lease Event of Default, provided that if such option is exercised
pursuant to this clause (ii) at a time when there shall have occurred and be
continuing for less than 180 days a Lease Event of Default, the purchase price
thereof shall equal the price provided in the preceding sentence plus the
Make-Whole Amount, if any.

            Such option to purchase the Secured Certificates may be exercised by
the Owner Trustee or the Owner Participant giving written notice of its election
of such option to the Indenture Trustee, which notice shall specify a date for
such purchase not more than 30 days or less than 15 days after the date of such
notice. The Indenture Trustee shall not exercise any of the remedies hereunder
or, without the consent of the Owner Trustee or the Owner Participant, under the
Lease, during the period from the time that a notice of exercise by the Owner
Participant of such option to purchase becomes irrevocable until the date on
which such purchase is required to occur pursuant to the terms of the preceding
sentence. Such election to purchase the Secured Certificates shall become
irrevocable upon the sixteenth day preceding the date specified in the written
notice described in the first sentence of this paragraph.

            If the Owner Trustee or the Owner Participant on or before the date
of such purchase shall so request, the Certificate Holders will comply with all
the provisions of Section 2.07 to enable new Secured Certificates to be issued
to the Owner Trustee or the Owner Participant or its nominee in such
denominations as the Owner Trustee or the Owner Participant shall request. All
taxes, charges and expenses required pursuant to Section 2.09 in connection with
the issuance of such new Secured Certificate shall be borne by the Owner
Participant.


                                      -28-
<PAGE>

            SECTION 2.15. Subordination.

            (a) The Owner Trustee and, by acceptance of its Secured Certificates
of any Series, each Certificate Holder of such Series, hereby agree that no
payment or distribution shall be made on or in respect of the Secured
Obligations owed to such Certificate Holder of such Series, including any
payment or distribution of cash, property or securities after the commencement
of a proceeding of the type referred to in Section 4.02(g) hereof, except as
expressly provided in Article III hereof.

            (b) By the acceptance of its Secured Certificates of any Series
(other than Series A), each Certificate Holder of such Series agrees that in the
event that such Certificate Holder, in its capacity as a Certificate Holder,
shall receive any payment or distribution on any Secured Obligations in respect
of such Series which it is not entitled to receive under this Section 2.15 or
Article III hereof, it will hold any amount so received in trust for the Senior
Holder (as defined in Section 2.15(c) hereof) and will forthwith turn over such
payment to the Indenture Trustee in the form received to be applied as provided
in Article III hereof.

            (c) As used in this Section 2.15, the term "Senior Holder" shall
mean, (i) the Certificate Holders of Series A until the Secured Obligations in
respect of Series A Secured Certificates have been paid in full and (ii) after
the Secured Obligations in respect of Series A Secured Certificates have been
paid in full, the Certificate Holders of Series B until the Secured Obligations
in respect of Series B Secured Certificates have been paid in full.

                                   ARTICLE III

                    RECEIPT, DISTRIBUTION AND APPLICATION OF
                     INCOME FROM THE TRUST INDENTURE ESTATE

            SECTION 3.01. Basic Rent Distribution.

            Except as otherwise provided in Section 3.03 hereof, each
installment of Basic Rent, any payment of interest on overdue installments of
Basic Rent and any payment received by the Indenture Trustee pursuant to Section
4.03 hereof shall be promptly distributed in the following order of priority:

First,      (i)   so much of such installment or payment as shall be required to
                  pay in full the aggregate amount of the payment or payments of
                  Principal Amount and interest and other amounts (as well as
                  any interest on any overdue Principal Amount and, to the
                  extent permitted by applicable law, on any overdue interest
                  and any other overdue amounts) then due under all Series A
                  Secured Certificates shall be distributed to the Certificate
                  Holders of Series A ratably, without priority of one over the
                  other, in the proportion that the amount of such payment or
                  payments then due under each Series A Secured Certificate
                  bears to the aggregate amount of the payments then due under
                  all Series A Secured Certificates;


                                      -29-
<PAGE>

            (ii)  after giving effect to paragraph (i) above, so much of such
                  installment or payment remaining as shall be required to pay
                  in full the aggregate amount of the payment or payments of
                  Principal Amount and interest and other amounts (as well as
                  any interest on any overdue Principal Amount and, to the
                  extent permitted by applicable law, on any overdue interest
                  and any other overdue amounts) then due under all Series B
                  Secured Certificates shall be distributed to the Certificate
                  Holders of Series B ratably, without priority of one over the
                  other, in the proportion that the amount of such payment or
                  payments then due under each Series B Secured Certificate
                  bears to the aggregate amount of the payments then due under
                  all Series B Secured Certificates; and

            (iii) after giving effect to paragraph (ii) above, so much of such
                  installment or payment remaining as shall be required to pay
                  in full the aggregate amount of the payment or payments of
                  Principal Amount and interest and other amounts (as well as
                  any interest on any overdue Principal Amount and, to the
                  extent permitted by applicable law, on any overdue interest
                  and any other overdue amounts) then due under all Series C
                  Secured Certificates shall be distributed to the Certificate
                  Holders of Series C ratably, without priority of one over the
                  other, in the proportion that the amount of such payment or
                  payments then due under each Series C Secured Certificate
                  bears to the aggregate amount of the payments then due under
                  all Series C Secured Certificates; and

Second,     the balance, if any, of such installment remaining thereafter shall
            be distributed to the Owner Trustee; provided, however, that if an
            Event of Default shall have occurred and be continuing, then such
            balance shall not be distributed as provided in this clause "Second"
            but shall be held by the Indenture Trustee as part of the Trust
            Indenture Estate and invested in accordance with Section 5.09 hereof
            until whichever of the following shall first occur: (i) all Events
            of Default shall have been cured or waived, in which event such
            balance shall be distributed as provided in this clause "Second"
            without reference to this proviso, (ii) Section 3.03 hereof shall be
            applicable, in which event such balance shall be distributed in
            accordance with the provisions of such Section 3.03, or (iii) the
            120th day after the receipt of such payment in which case such
            payment shall be distributed as provided in this clause "Second"
            without reference to this proviso.

            SECTION 3.02. Event of Loss; Replacement; Voluntary Termination;
Refinancing.

            Except as otherwise provided in Section 3.03 hereof, any payments
received by the Indenture Trustee (i) with respect to the Aircraft as the result
of an Event of Loss, (ii) pursuant to a voluntary termination of the Lease
pursuant to Section 9 or 19(d) thereof, or (iii) in connection with a
refinancing of the Secured Certificates pursuant to Section 17 of the
Participation Agreement shall be applied to redemption of the Secured
Certificates and to all other amounts payable hereunder or to the Indenture
Trustee or any Certificate Holder under the Participation Agreement by applying
such funds in the following order of priority:


                                      -30-
<PAGE>

First,      (a) to reimburse the Indenture Trustee and the Certificate Holders
            for any reasonable costs or expenses incurred in connection with
            such redemption for which they are entitled to reimbursement, or
            indemnity by Lessee, under the Operative Documents and then (b) to
            pay any other amounts then due to the Indenture Trustee and the
            Certificate Holders under this Trust Indenture, the Participation
            Agreement or the Secured Certificates (other than amounts specified
            in clause Second below);

Second,     (i)   to pay the amounts specified in paragraph (i) of clause
                  "Third" of Section 3.03 hereof plus Make-Whole Amount, if any,
                  then due and payable in respect of the Series A Secured
                  Certificates;

            (ii)  after giving effect to paragraph (i) above, to pay the amounts
                  specified in paragraph (ii) of clause "Third" of Section 3.03
                  hereof plus Make-Whole Amount, if any, then due and payable in
                  respect of the Series B Secured Certificates; and

            (iii) after giving effect to paragraph (ii) above, to pay the
                  amounts specified in paragraph (iii) of clause "Third" of
                  Section 3.03 hereof plus Make-Whole Amount, if any, then due
                  and payable in respect of the Series C Secured Certificates;
                  and

Third,      as provided in clause "Fourth" of Section 3.03 hereof;

provided, however, that if a Replacement Airframe or Replacement Engine shall be
substituted for the Airframe or Engine subject to such Event of Loss as provided
in Section 10 of the Lease and in accordance with Section 5.06 hereof, any
insurance, condemnation or similar proceeds which result from such Event of Loss
and are paid over to the Indenture Trustee shall be held by the Indenture
Trustee as permitted by Section 6.04 hereof (provided that such moneys shall be
invested as provided in Section 5.09 hereof) as additional security for the
obligations of Lessee under the Lessee Operative Documents and, unless otherwise
applied pursuant to the Lease, such proceeds (and such investment earnings)
shall be released to Lessee at Lessee's written request upon the release of such
damaged Airframe or Engine and the replacement thereof as provided in the Lease.

            SECTION 3.03. Payments After Event of Default.

            Except as otherwise provided in Section 3.04 hereof, all payments
received and amounts held or realized by the Indenture Trustee (including any
amounts realized by the Indenture Trustee from the exercise of any remedies
pursuant to Section 15 of the Lease or Article IV hereof) after both an Event of
Default shall have occurred and be continuing and the Secured Certificates shall
have become due and payable pursuant to Section 4.04(b) hereof, as well as all
payments or amounts then held by the Indenture Trustee as part of the Trust
Indenture Estate, shall be promptly distributed by the Indenture Trustee in the
following order of priority:

First,      so much of such payments or amounts as shall be required to
            reimburse the Indenture Trustee for any tax, expense or other loss
            (including, without limitation, all amounts to be expended at the
            expense of, or charged upon the tolls, rents,


                                      -31-
<PAGE>

            revenues, issues, products and profits of, the property included in
            the Trust Indenture Estate (all such property being herein called
            the "Mortgaged Property") pursuant to Section 4.05(b) hereof)
            incurred by the Indenture Trustee (to the extent not previously
            reimbursed), the expenses of any sale, taking or other proceeding,
            reasonable attorneys' fees and expenses, court costs, and any other
            expenditures incurred or expenditures or advances made by the
            Indenture Trustee or the Certificate Holders in the protection,
            exercise or enforcement of any right, power or remedy or any damages
            sustained by the Indenture Trustee or any Certificate Holder,
            liquidated or otherwise, upon such Event of Default shall be applied
            by the Indenture Trustee as between itself and the Certificate
            Holders in reimbursement of such expenses and any other expenses for
            which the Indenture Trustee or the Certificate Holders are entitled
            to reimbursement under any Operative Document and in the case the
            aggregate amount to be so distributed is insufficient to pay as
            aforesaid, then ratably, without priority of one over the other, in
            proportion to the amounts owed each hereunder;

Second,     so much of such payments or amounts remaining as shall be required
            to reimburse the then existing or prior Certificate Holders for
            payments made pursuant to Section 5.03 hereof (to the extent not
            previously reimbursed) shall be distributed to such then existing or
            prior Certificate Holders ratably, without priority of one over the
            other, in accordance with the amount of the payment or payments made
            by each such then existing or prior Certificate Holder pursuant to
            said Section 5.03 hereof;

Third,      (i)   so much of such payments or amounts remaining as shall be
                  required to pay in full the aggregate unpaid Principal Amount
                  of all Series A Secured Certificates, and the accrued but
                  unpaid interest and other amounts due thereon and all other
                  Secured Obligations in respect of the Series A Secured
                  Certificates to the date of distribution, shall be distributed
                  to the Certificate Holders of Series A, and in case the
                  aggregate amount so to be distributed shall be insufficient to
                  pay in full as aforesaid, then ratably, without priority of
                  one over the other, in the proportion that the aggregate
                  unpaid Principal Amount of all Series A Secured Certificates
                  held by each holder plus the accrued but unpaid interest and
                  other amounts due hereunder or thereunder to the date of
                  distribution, bears to the aggregate unpaid Principal Amount
                  of all Series A Secured Certificates held by all such holders
                  plus the accrued but unpaid interest and other amounts due
                  thereon to the date of distribution;

            (ii)  after giving effect to paragraph (i) above, so much of such
                  payments or amounts remaining as shall be required to pay in
                  full the aggregate unpaid Principal Amount of all Series B
                  Secured Certificates, and the accrued but unpaid interest and
                  other amounts due thereon and all other Secured Obligations in
                  respect of the Series B Secured Certificates to the date of
                  distribution, shall be distributed to the Certificate Holders
                  of Series B, and in case the aggregate amount so to be
                  distributed shall be insufficient to pay in full as aforesaid,
                  then ratably, without priority of one over the other,


                                      -32-
<PAGE>

                  in the proportion that the aggregate unpaid Principal Amount
                  of all Series B Secured Certificates held by each holder plus
                  the accrued but unpaid interest and other amounts due
                  hereunder or thereunder to the date of distribution, bears to
                  the aggregate unpaid Principal Amount of all Series B Secured
                  Certificates held by all such holders plus the accrued but
                  unpaid interest and other amounts due thereon to the date of
                  distribution; and

            (iii) after giving effect to paragraph (ii) above, so much of such
                  payments or amounts remaining as shall be required to pay in
                  full the aggregate unpaid Principal Amount of all Series C
                  Secured Certificates, and the accrued but unpaid interest and
                  other amounts due thereon and all other Secured Obligations in
                  respect of the Series C Secured Certificates to the date of
                  distribution, shall be distributed to the Certificate Holders
                  of Series C, and in case the aggregate amount so to be
                  distributed shall be insufficient to pay in full as aforesaid,
                  then ratably, without priority of one over the other, in the
                  proportion that the aggregate unpaid Principal Amount of all
                  Series C Secured Certificates held by each holder plus the
                  accrued but unpaid interest and other amounts due hereunder or
                  thereunder to the date of distribution, bears to the aggregate
                  unpaid Principal Amount of all Series C Secured Certificates
                  held by all such holders plus the accrued but unpaid interest
                  and other amounts due thereon to the date of distribution; and

Fourth,     the balance, if any, of such payments or amounts remaining
            thereafter shall be distributed to the Owner Trustee.

            No Make-Whole Amount shall be due and payable on the Secured
Certificates as a consequence of the acceleration of the Secured Certificates.

            SECTION 3.04. Certain Payments.

            (a) Any payments received by the Indenture Trustee for which no
provision as to the application thereof is made in this Trust Indenture and for
which such provision is made in the Lease, the Participation Agreement or any
other Operative Document shall be applied forthwith to the purpose for which
such payment was made in accordance with the terms of the Lease, the
Participation Agreement or such other Operative Document, as the case may be.

            (b) The Indenture Trustee will distribute promptly upon receipt any
indemnity payment received by it from the Owner Trustee or Lessee in respect of
(i) the Indenture Trustee in its individual capacity, (ii) any Certificate
Holder, (iii) the Subordination Agent, (iv) the Liquidity Provider, and (v) the
Pass Through Trustees, in each case whether pursuant to Section 7 of the
Participation Agreement or as Supplemental Rent, directly to the Person entitled
thereto. Any payment received by the Indenture Trustee under clause (b) of the
third paragraph of Section 2.02 shall be distributed to the Subordination Agent
to be distributed in accordance with the terms of the Intercreditor Agreement,
and any payment received by the Indenture Trustee under clause (c) of the third
paragraph of Section 2.02 shall be distributed directly to the Persons entitled
thereto.


                                      -33-
<PAGE>

            (c) [Intentionally Omitted]

            (d) Notwithstanding anything to the contrary contained in this
Article III, any amounts received by the Indenture Trustee which constitute
Excluded Payments shall be distributed promptly upon receipt by the Indenture
Trustee directly to the Person or Persons entitled thereto.

            (e) Notwithstanding any provision of this Trust Indenture to the
contrary, any amounts held by the Indenture Trustee that would, but for the
provisions of Section 3.03 hereof, otherwise be distributed to Lessee shall,
notwithstanding the provisions of said Section, be distributed to Lessee unless
and until a Lease Event of Default shall have occurred and be continuing.

            SECTION 3.05. Other Payments.

            Any payments received by the Indenture Trustee for which no
provision as to the application thereof is made in the Lease, the Participation
Agreement, elsewhere in this Trust Indenture or in any other Operative Document
shall be distributed by the Indenture Trustee to the extent received or realized
at any time (i) prior to the payment in full of all Secured Obligations due the
Certificate Holders, in the order of priority specified in Section 3.01 hereof
subject to the proviso thereto, and (ii) after payment in full of all Secured
Obligations due the Certificate Holders, in the following order of priority:

First,      to the extent payments or amounts described in clause "First" of
            Section 3.03 hereof are otherwise obligations of Lessee under the
            Operative Documents or for which Lessee is obligated to indemnify
            against thereunder, in the manner provided in clause "First" of
            Section 3.03 hereof, and

Second,     in the manner provided in clause "Fourth" of Section 3.03 hereof.

            Further, and except as otherwise provided in Sections 3.02, 3.03 and
            3.04 hereof, all payments received and amounts realized by the
            Indenture Trustee under the Lease or otherwise with respect to the
            Aircraft (including, without limitation, all amounts realized upon
            the sale or release of the Aircraft after the termination of the
            Lease with respect thereto), to the extent received or realized at
            any time after payment in full of all Secured Obligations due the
            Certificate Holders, shall be distributed by the Indenture Trustee
            in the order of priority specified in clause (ii) of the immediately
            preceding sentence of this Section 3.05.

            SECTION 3.06. Payments to the Owner Trustee.

            Any amounts distributed hereunder by the Indenture Trustee to the
Owner Trustee shall be paid to the Owner Trustee (within the time limits
contemplated by Section 2.04(a)) by wire transfer of funds of the type received
by the Indenture Trustee at such office and to such account or accounts of such
entity or entities as shall be designated by notice from the Owner Trustee to
the Indenture Trustee from time to time. The Owner Trustee hereby notifies the
Indenture Trustee that unless and until the Indenture Trustee receives notice to
the contrary from the Owner Trustee, all amounts to be distributed to the Owner
Trustee pursuant to clause


                                      -34-
<PAGE>

"Second" of Section 3.01 hereof shall be distributed by wire transfer of funds
of the type received by the Indenture Trustee to the Owner Participant's account
(within the time limits contemplated by Section 2.04(a)) specified in Schedule I
to the Participation Agreement.

            SECTION 3.07. Application of Payments Under Guarantee.

            All payments received by the Indenture Trustee pursuant to the
Guarantee shall be distributed forthwith by the Indenture Trustee in the same
order of priority, and in the same manner, as it would have distributed the
payment in respect of which such payment under the Guarantee was received.

                                   ARTICLE IV

                    COVENANTS OF THE OWNER TRUSTEE; EVENTS OF
                     DEFAULT; REMEDIES OF INDENTURE TRUSTEE

            SECTION 4.01. Covenants of the Owner Trustee.

            The Owner Trustee hereby covenants and agrees (the covenants and
agreements only in clause (b) below being made by the Owner Trustee in its
individual capacity) as follows:

                  (a) the Owner Trustee will duly and punctually pay the
            Principal Amount of, Make-Whole Amount, if any, and interest on and
            other amounts due under the Secured Certificates and hereunder in
            accordance with the terms of the Secured Certificates and this Trust
            Indenture and all amounts, if any, payable by it to the Certificate
            Holders under the Participation Agreement;

                  (b) the Owner Trustee in its individual capacity covenants and
            agrees that it shall not, directly or indirectly, cause or permit to
            exist a Lessor Lien attributable to it in its individual capacity
            with respect to the Aircraft or any other portion of the Trust
            Estate; that it will promptly, at its own expense, take such action
            as may be necessary to duly discharge such Lessor Lien attributable
            to it in its individual capacity; and that it will make restitution
            to the Trust Estate for any actual diminution of the assets of the
            Trust Estate resulting from such Lessor Liens attributable to it in
            its individual capacity;

                  (c) in the event the Owner Trustee shall have Actual Knowledge
            of an Event of Default, a Default or an Event of Loss, the Owner
            Trustee will give prompt written notice of such Event of Default,
            Default or Event of Loss to the Indenture Trustee, each Certificate
            Holder, Lessee and the Owner Participant;

                  (d) the Owner Trustee will furnish to the Indenture Trustee,
            promptly upon receipt thereof, duplicates or copies of all reports,
            notices, requests, demands, certificates and other instruments
            furnished to the Owner Trustee under the Lease, including, without
            limitation, a copy of any Termination Notice and a copy of each
            report or notice received pursuant to Section 9(a) and 11(c) of the


                                      -35-
<PAGE>

            Lease to the extent that the same shall not have been furnished to
            the Indenture Trustee pursuant to the Lease;

                  (e) except pursuant to the Operative Documents or with the
            consent of the Indenture Trustee (acting pursuant to instructions
            given in accordance with Section 9.01 hereof), the Owner Trustee
            will not contract for, create, incur, assume or suffer to exist any
            Debt, and will not guarantee (directly or indirectly or by an
            instrument having the effect of assuring another's payment or
            performance on any obligation or capability of so doing, or
            otherwise), endorse or otherwise be or become contingently liable,
            directly or indirectly, in connection with the Debt of any other
            person; and

                  (f) the Owner Trustee will not enter into any business or
            other activity other than the business of owning the Aircraft, the
            leasing thereof to Lessee and the carrying out of the transactions
            contemplated hereby and by the Lease, the Participation Agreement,
            the Trust Agreement and the other Operative Documents.

            SECTION 4.02. Event of Default.

            "Event of Default" means any of the following events (whatever the
reason for such Event of Default and whether such event shall be voluntary or
involuntary or come about or be effected by operation of Law or pursuant to or
in compliance with any judgment, decree or order of any court or any order, rule
or regulation of any administrative or governmental body):

            (a) any Lease Event of Default (provided that any such Lease Event
of Default caused solely by a failure of Lessee to pay to the Owner Trustee or
the Owner Participant when due any amount that is included in the definition of
Excluded Payments shall not constitute an Event of Default unless notice is
given by the Owner Trustee to the Indenture Trustee that such failure shall
constitute an Event of Default); or

            (b) the failure of the Owner Trustee to pay when due any payment of
Principal Amount of, interest on, Make-Whole Amount, if any, or other amount due
and payable under any Secured Certificate or hereunder (other than any such
failure arising by virtue of a tax withheld pursuant to Section 2.04(b) hereof
or as a result of a Lease Event of Default or a Lease Default) and such failure
shall have continued unremedied for ten (10) Business Days in the case of any
payment of Principal Amount or interest or Make-Whole Amount, if any, thereon
and, in the case of any other amount, for ten (10) Business Days after the Owner
Trustee or the Owner Participant receives written demand from the Indenture
Trustee or any Certificate Holder; or

            (c) any Lien required to be discharged by the Owner Trustee, in its
individual capacity pursuant to Section 4.01(b) hereof or in its individual or
trust capacity pursuant to Section 8(h) of the Participation Agreement, or by
the Owner Participant pursuant to Section 8(h) of the Participation Agreement
shall remain undischarged for a period of thirty (30) days after the Owner
Trustee and the Owner Participant shall have received written notice from the
Indenture Trustee or any Certificate Holder of such Lien; or


                                      -36-
<PAGE>

            (d) any representation or warranty made by the Owner Participant or
the Owner Trustee herein, in the Participation Agreement or in any document or
certificate furnished by the Owner Participant or the Owner Trustee to the
Indenture Trustee or any Certificate Holder in connection with the transactions
contemplated by the Operative Documents shall prove to have been false or
incorrect when made in any material respect and continues to be material; and if
such misrepresentation is capable of being corrected and if such correction is
being sought diligently, such misrepresentation shall not have been corrected
within sixty (60) days (or, without affecting Section 4.02(f) hereof, in the
case of the representations made in Section 8(c) of the Participation Agreement
as to the citizenship of the Owner Trustee in its individual capacity or of the
Owner Participant, respectively, as soon as is reasonably practicable but in any
event within sixty (60) days) following notice thereof from the Indenture
Trustee or any Certificate Holder to the Owner Trustee or the Owner Participant,
as the case may be; or

            (e) other than as provided in (c) above or (f) below, any failure by
the Owner Trustee or Owner Participant to observe or perform any other covenant
or obligation of the Owner Trustee or Owner Participant, as the case may be, for
the benefit of the Indenture Trustee or the Certificate Holders contained in the
Participation Agreement, Section 4.01(a) of the Trust Agreement, the Secured
Certificates or this Trust Indenture which is not remedied within a period of
sixty (60) days after notice thereof has been given to the Owner Trustee and the
Owner Participant; or

            (f) if at any time when the Aircraft is registered under the laws of
the United States, the Owner Participant shall not be a Citizen of the United
States, and as the result thereof the registration of the Aircraft under the
Federal Aviation Act, and regulations then applicable thereunder, shall cease to
be effective; provided that no Event of Default shall be deemed to have occurred
under this paragraph (f) unless such circumstances continue unremedied for more
than sixty (60) days after the Owner Participant has Actual Knowledge of the
state of facts that resulted in such ineffectiveness and of such loss of
citizenship; or

            (g) at any time either (i) the commencement of an involuntary case
or other proceeding in respect of the Owner Participant, the Owner Trustee or
the Trust Estate in an involuntary case under the federal bankruptcy laws, as
now or hereafter constituted, or any other applicable federal or state
bankruptcy, insolvency or other similar law in the United States or seeking the
appointment of a receiver, liquidator, assignee, custodian, trustee,
sequestrator (or similar official) of the Owner Participant, the Owner Trustee
or the Trust Estate or for all or substantially all of its property, or seeking
the winding-up or liquidation of its affairs and the continuation of any such
case or other proceeding undismissed and unstayed for a period of ninety (90)
consecutive days; or (ii) the commencement by the Owner Participant, the Owner
Trustee or the Trust Estate of a voluntary case or proceeding under the federal
bankruptcy laws, as now constituted or hereafter amended, or any other
applicable federal or state bankruptcy, insolvency or other similar law in the
United States, or the consent by the Owner Participant, the Owner Trustee or the
Trust Estate to the appointment of or taking possession by a receiver,
liquidator, assignee, trustee, custodian, sequestrator (or other similar
official) of the Owner Participant, the Owner Trustee or the Trust Estate or for
all or substantially all of its property, or the making by the Owner
Participant, the Owner Trustee or the Trust Estate of any assignment for the
benefit of creditors or the Owner Participant or the Owner Trustee shall take
any action to authorize any of the foregoing; provided, however, that an event
referred to in this Section


                                      -37-
<PAGE>

4.02(g) with respect to the Owner Participant shall not constitute an Event of
Default if within thirty (30) days of the commencement of the case or proceeding
a final non-appealable order, judgment or decree shall be entered in such case
or proceeding by a court or a trustee, custodian, receiver or liquidator, to the
effect that, no part of the Trust Estate (except for the Owner Participant's
beneficial interest therein) and no right, title or interest under the Trust
Indenture Estate shall be included in, or be subject to, any declaration or
adjudication of, or proceedings with respect to, the bankruptcy, insolvency or
liquidation of the Owner Participant referred to in this Section 4.02(g).

            SECTION 4.03. Certain Rights.

            The Indenture Trustee shall give the Certificate Holders, the Owner
Trustee and the Owner Participant prompt written notice of any Event of Default
of which the Indenture Trustee has Actual Knowledge and, if any such Event of
Default results from a Lease Event of Default, shall give the Certificate
Holders, the Owner Trustee and the Owner Participant not less than ten (10)
Business Days' prior written notice of the date (the "Enforcement Date") on or
after which the Indenture Trustee may commence and consummate the exercise of
any remedy or remedies described in Section 4.04, 4.05 or 4.06 hereof, or the
exercise of any remedy or remedies pursuant to the provisions of Section 15 of
the Lease. If an Event of Default shall have occurred and be continuing, the
Owner Trustee shall have the following rights hereunder, any of which may be
exercised directly by the Owner Participant.

            If as a result of the occurrence of an Event of Default in respect
of the nonpayment by Lessee of Basic Rent due under the Lease, the Indenture
Trustee shall have insufficient funds to make any payment of Principal Amount
and interest on any Secured Certificate on the day it becomes due and payable,
the Owner Trustee or the Owner Participant may, but shall not be obligated to,
pay the Indenture Trustee prior to the Enforcement Date, in the manner provided
in Section 2.04 hereof, for application in accordance with Section 3.01 hereof,
an amount equal to the portion of the Principal Amount and interest (including
interest, if any, on any overdue payments of such portion of Principal Amount
and interest) then due and payable on the Secured Certificates, and, unless the
Owner Trustee has cured Events of Default in respect of payments of Basic Rent
on each of the three immediately preceding Basic Rent payment dates, or the
Owner Trustee has cured six previous Events of Default in respect of payments of
Basic Rent, such payment by the Owner Trustee shall, solely for purposes of this
Trust Indenture be deemed to cure any Event of Default which would otherwise
have arisen on account of the nonpayment by Lessee of such installment of Basic
Rent (but not any other Default or Event of Default which shall have occurred
and be continuing).

            If any Event of Default (other than in respect of the nonpayment of
Basic Rent by Lessee) which can be cured has occurred, the Owner Trustee or the
Owner Participant may, but shall not be obligated to, cure such Event of Default
by taking such action prior to the Enforcement Date as is necessary to
accomplish the observance or performance of the defaulted covenant, condition or
agreement.

            Except as hereinafter in this Section 4.03 provided, the Owner
Trustee shall not, as a result of exercising the right to cure any such Event of
Default, obtain any Lien on any of the Mortgaged Property or any Rent payable
under the Lease for or on account of costs or


                                      -38-
<PAGE>

expenses incurred in connection with the exercise of such right, nor shall any
claim of the Owner Trustee against Lessee or any other party for the repayment
of such costs or expenses impair the prior right and security interest of the
Indenture Trustee in and to the Mortgaged Property. Upon any payment by the
Owner Trustee or the Owner Participant pursuant to the first or second preceding
paragraphs of this Section 4.03, the Owner Trustee or the Owner Participant, as
the case may be, shall be subrogated to the rights of the Indenture Trustee and
the Certificate Holders in respect of the Basic Rent which was overdue at the
time of such payment and interest payable by Lessee on account of its being
overdue and any Supplemental Rent in respect of the reimbursement of amounts
paid by the Owner Trustee pursuant to the immediately preceding paragraph (but
in either case shall have no rights as a secured party hereunder), and
thereafter, the Owner Trustee or the Owner Participant, as the case may be,
shall be entitled to receive such overdue Basic Rent or Supplemental Rent, as
the case may be, and interest thereon upon receipt thereof by the Indenture
Trustee (and shall be entitled to bring an action against Lessee to enforce such
payment); provided, however, that (i) if the Principal Amount and interest on
the Secured Certificates shall have become due and payable pursuant to Section
4.04(b) hereof, such subrogation shall, until the Principal Amount of, interest
on, Make-Whole Amount, if any, and all other amounts due with respect to all
Secured Certificates shall have been paid in full, be subordinate to the rights
of the Indenture Trustee and the Certificate Holders in respect of such payment
of overdue Basic Rent, Supplemental Rent and such interest and (ii) the Owner
Trustee shall not be entitled to seek to recover any such payment (or any
payment in lieu thereof) except pursuant to the foregoing right of subrogation
by demand or suit for damages.

            SECTION 4.04. Remedies.

            (a) Subject to the provisions of Section 2.14 hereof, if an Event of
Default shall have occurred and be continuing and so long as the same shall
continue unremedied, then and in every such case the Indenture Trustee may,
subject to the second paragraph of this Section 4.04(a), on and after the
Enforcement Date if such Event of Default results from a Lease Event of Default,
exercise any or all of the rights and powers and pursue any and all of the
remedies pursuant to this Article IV and shall have and may exercise all of the
rights and remedies of a secured party under the Uniform Commercial Code and, in
the event such Event of Default is also a Lease Event of Default, any and all of
the remedies pursuant to Section 15 of the Lease and may take possession of all
or any part of the properties covered or intended to be covered by the Lien
created hereby or pursuant hereto and may exclude the Owner Participant, the
Owner Trustee and Lessee and all persons claiming under any of them wholly or
partly therefrom, provided, that the Indenture Trustee shall give the Owner
Trustee and the Owner Participant twenty (20) days' prior written notice of its
intention to sell the Aircraft. Without limiting any of the foregoing, it is
understood and agreed that the Indenture Trustee may exercise any right of sale
of the Aircraft available to it, even though it shall not have taken possession
of the Aircraft and shall not have possession thereof at the time of such sale.

            Anything in this Trust Indenture to the contrary notwithstanding,
the Indenture Trustee shall not be entitled to exercise any remedy hereunder as
a result of an Event of Default which arises solely by reason of one or more
events or circumstances which constitute a Lease Event of Default unless the
Indenture Trustee as security assignee of the Owner Trustee shall have exercised
or concurrently be exercising one or more of the remedies provided for in
Section 15 of the Lease to terminate the Lease or take possession and/or sell
the Aircraft; provided,


                                      -39-
<PAGE>

however, that such requirement to exercise one or more of such remedies under
the Lease shall not apply in circumstances where the Indenture Trustee is, and
has been, for a continuous period in excess of 60 days or such other period as
may be specified in Section 1110(a)(1)(A) of the Bankruptcy Code (such 60-day or
other period being the "Section 1110 Period"), involuntarily stayed or
prohibited by applicable law or court order from exercising such remedies under
the Lease (a "Continuous Stay Period"); provided further, however, that the
requirement to exercise one or more of such remedies under the Lease shall
nonetheless be applicable during a Continuous Stay Period subsequent to the
expiration of the Section 1110 Period to the extent that the continuation of
such Continuous Stay Period subsequent to the expiration of the Section 1110
Period (A) results from an agreement by the trustee or the debtor-in-possession
in such proceeding during the Section 1110 Period with the approval of the
relevant court to perform the Lease in accordance with Section 1110(a)(1)(A) of
the Bankruptcy Code and continues to perform as required by Section
1110(a)(1)(A-B) of the Bankruptcy Code or (B) is an extension of the Section
1110 Period with the consent of the Indenture Trustee pursuant to Section
1110(b) of the Bankruptcy Code or (C) results from Lessee's assumption during
the Section 1110 Period with the approval of the relevant court of the Lease
pursuant to Section 365 of the Bankruptcy Code or (D) is the consequence of the
Indenture Trustee's own failure to give any requisite notice to any Person. In
the event that the applicability of Section 1110 of the Bankruptcy Code to the
Aircraft is being contested by Lessee in judicial proceedings, so long as the
Indenture Trustee fails to participate in such proceedings, the Owner Trustee
shall have the right (without affecting in any way any rights or remedy of the
Indenture Trustee hereunder) to participate in such proceedings.

            It is expressly understood and agreed that, subject only to the
immediately preceding paragraph, the inability, described in such paragraphs, of
the Indenture Trustee to exercise any right or remedy under the Lease shall in
no event and under no circumstances prevent the Indenture Trustee from
exercising any or all of its rights, powers and remedies under this Trust
Indenture, including, without limitation, this Article IV.

            (b) If an Event of Default shall have occurred and be continuing,
then and in every such case the Indenture Trustee may (and shall, upon receipt
of a written demand therefor from a Majority in Interest of Certificate
Holders), subject to Section 4.03 hereof, at any time, by delivery of written
notice or notices to the Owner Trustee and the Owner Participant, declare all
the Secured Certificates to be due and payable, whereupon the unpaid Principal
Amount of all Secured Certificates then outstanding, together with accrued but
unpaid interest thereon (without Make-Whole Amount) and other amounts due
thereunder, shall immediately become due and payable without presentment,
demand, protest or notice, all of which are hereby waived.

            This Section 4.04(b), however, is subject to the condition that, if
at any time after the Principal Amount of the Secured Certificates shall have
become so due and payable, and before any judgment or decree for the payment of
the money so due, or any thereof, shall be entered, all overdue payments of
interest upon the Secured Certificates and all other amounts payable under the
Secured Certificates (except the Principal Amount of the Secured Certificates
which by such declaration shall have become payable) shall have been duly paid,
and every other Default and Event of Default with respect to any covenant or
provision of this Trust Indenture shall have been cured, then and in every such
case a Majority in Interest of Certificate Holders may (but shall not be
obligated to), by written instrument filed with the Indenture Trustee,


                                      -40-
<PAGE>

rescind and annul the Indenture Trustee's declaration and its consequences; but
no such rescission or annulment shall extend to or affect any subsequent Default
or Event of Default or impair any right consequent thereon.

            (c) Any Certificate Holder shall be entitled, at any sale pursuant
to Section 15 of the Lease or this Section 4.04, to credit against any purchase
price bid at such sale by such holder all or any part of the unpaid obligations
owing to such Certificate Holder and secured by the Lien of this Trust Indenture
(but only to the extent that such purchase price would have been paid to such
Certificate Holder pursuant to Article III hereof if such purchase price were
paid in cash and the foregoing provisions of this subsection (c) were not given
effect).

            (d) In the event of any sale of the Trust Indenture Estate, or any
part thereof, pursuant to any judgment or decree of any court or otherwise in
connection with the enforcement of any of the terms of this Trust Indenture, the
unpaid Principal Amount of all Secured Certificates then outstanding, together
with accrued interest thereon, and other amounts due thereunder, shall
immediately become due and payable without presentment, demand, protest or
notice, all of which are hereby waived.

            (e) Notwithstanding anything contained herein, so long as the Pass
Through Trustee under any Pass Through Trust Agreement or the Subordination
Agent on its behalf is a Certificate Holder, the Indenture Trustee will not be
authorized or empowered to acquire title to any Mortgaged Property or take any
action with respect to any Mortgaged Property so acquired by it if such
acquisition or action would cause any Pass Through Trust to fail to qualify as a
"grantor trust" for federal income tax purposes.

            SECTION 4.05. Return of Aircraft, Etc.

            (a) If an Event of Default shall have occurred and be continuing,
subject to Sections 4.03 and 4.04 hereof, at the request of the Indenture
Trustee, the Owner Trustee shall promptly execute and deliver to the Indenture
Trustee such instruments of title and other documents as the Indenture Trustee
may deem necessary or advisable to enable the Indenture Trustee or an agent or
representative designated by the Indenture Trustee, at such time or times and
place or places as the Indenture Trustee may specify, to obtain possession of
all or any part of the Mortgaged Property included in the Trust Indenture Estate
to which the Indenture Trustee shall at the time be entitled hereunder. If the
Owner Trustee shall for any reason fail to execute and deliver such instruments
and documents after such request by the Indenture Trustee, the Indenture Trustee
may (i) obtain a judgment conferring on the Indenture Trustee the right to
immediate possession and requiring the Owner Trustee to execute and deliver such
instruments and documents to the Indenture Trustee, to the entry of which
judgment the Owner Trustee hereby specifically consents to the fullest extent
permitted by applicable law, and (ii) pursue all or part of such Mortgaged
Property wherever it may be found and, in the event that a Lease Event of
Default has occurred and is continuing, may enter any of the premises of Lessee
wherever such Mortgaged Property may be or be supposed to be and search for such
Mortgaged Property and take possession of and remove such Mortgaged Property.
All expenses of obtaining such judgment or of pursuing, searching for and taking
such property shall, until paid, be secured by the Lien of this Trust Indenture.


                                      -41-
<PAGE>

            (b) Upon every such taking of possession, the Indenture Trustee may,
from time to time, at the expense of the Mortgaged Property, make all such
expenditures for maintenance, use, operation, storage, insurance, leasing,
control, management, disposition, modifications or alterations to and of the
Mortgaged Property, as it may deem proper. In each such case, the Indenture
Trustee shall have the right to maintain, use, operate, store, insure, lease,
control, manage, dispose of, modify or alter the Mortgaged Property and to carry
on the business and to exercise all rights and powers of the Owner Participant
and the Owner Trustee relating to the Mortgaged Property, as the Indenture
Trustee shall deem best, including the right to enter into any and all such
agreements with respect to the maintenance, use, operation, storage, insurance,
leasing, control, management, disposition, modification or alteration of the
Mortgaged Property or any part thereof as the Indenture Trustee may determine,
and the Indenture Trustee shall be entitled to collect and receive directly all
tolls, rents (including Rent), revenues, issues, income, products and profits of
the Mortgaged Property and every part thereof, except Excluded Payments, without
prejudice, however, to the right of the Indenture Trustee under any provision of
this Trust Indenture to collect and receive all cash held by, or required to be
deposited with, the Indenture Trustee hereunder. Such tolls, rents (including
Rent), revenues, issues, income, products and profits shall be applied to pay
the expenses of the maintenance, use, operation, storage, insurance, leasing,
control, management, disposition, improvement, modification or alteration of the
Mortgaged Property and of conducting the business thereof, and to make all
payments which the Indenture Trustee may be required or may elect to make, if
any, for taxes, assessments, insurance or other proper charges upon the
Mortgaged Property or any part thereof (including the employment of engineers
and accountants to examine, inspect and make reports upon the properties and
books and records of the Owner Trustee), and all other payments which the
Indenture Trustee may be required or authorized to make under any provision of
this Trust Indenture, as well as just and reasonable compensation for the
services of the Indenture Trustee, and of all persons properly engaged and
employed by the Indenture Trustee with respect hereto.

            SECTION 4.06. Remedies Cumulative.

            Each and every right, power and remedy given to the Indenture
Trustee specifically or otherwise in this Trust Indenture shall be cumulative
and shall be in addition to every other right, power and remedy herein
specifically given or now or hereafter existing at law, in equity or by statute,
and each and every right, power and remedy whether specifically herein given or
otherwise existing may be exercised from time to time and as often and in such
order as may be deemed expedient by the Indenture Trustee, and the exercise or
the beginning of the exercise of any power or remedy shall not be construed to
be a waiver of the right to exercise at the same time or thereafter any other
right, power or remedy. No delay or omission by the Indenture Trustee in the
exercise of any right, remedy or power or in the pursuance of any remedy shall
impair any such right, power or remedy or be construed to be a waiver of any
default on the part of the Owner Trustee or Lessee or to be an acquiescence
therein.

            SECTION 4.07. Discontinuance of Proceedings.

            In case the Indenture Trustee shall have instituted any proceeding
to enforce any right, power or remedy under this Trust Indenture by foreclosure,
entry or otherwise, and such proceedings shall have been discontinued or
abandoned for any reason or shall have been determined adversely to the
Indenture Trustee, then and in every such case the Owner Trustee,


                                      -42-
<PAGE>

the Indenture Trustee and Lessee shall, subject to any determination in such
proceedings, be restored to their former positions and rights hereunder with
respect to the Mortgaged Property, and all rights, remedies and powers of the
Owner Trustee, the Indenture Trustee or Lessee shall continue as if no such
proceedings had been instituted.

            SECTION 4.08. Waiver of Past Defaults.

            Upon written instruction from a Majority in Interest of Certificate
Holders, the Indenture Trustee shall waive any past Default hereunder and its
consequences and upon any such waiver such Default shall cease to exist and any
Event of Default arising therefrom shall be deemed to have been cured for every
purpose of this Trust Indenture, but no such waiver shall extend to any
subsequent or other Default or impair any right consequent thereon; provided,
that in the absence of written instructions from all the Certificate Holders,
the Indenture Trustee shall not waive any Default (i) in the payment of the
Principal Amount, Make-Whole Amount, if any, and interest and other amounts due
under any Secured Certificate then outstanding, or (ii) in respect of a covenant
or provision hereof which, under Article IX hereof, cannot be modified or
amended without the consent of each Certificate Holder.

            SECTION 4.09. Appointment of Receiver.

            The Indenture Trustee shall, as a matter of right, be entitled to
the appointment of a receiver (who may be the Indenture Trustee or any successor
or nominee thereof) for all or any part of the Mortgaged Property, whether such
receivership be incidental to a proposed sale of the Mortgaged Property or the
taking of possession thereof or otherwise, and the Owner Trustee hereby consents
to the appointment of such a receiver and will not oppose any such appointment.
Any receiver appointed for all or any part of the Mortgaged Property shall be
entitled to exercise all the rights and powers of the Indenture Trustee with
respect to the Mortgaged Property.

            SECTION 4.10. Indenture Trustee Authorized to Execute Bills of Sale,
Etc.

            The Owner Trustee irrevocably appoints the Indenture Trustee the
true and lawful attorney-in-fact of the Owner Trustee in its name and stead and
on its behalf, for the purpose, if an Event of Default shall have occurred and
be continuing, of effectuating any sale, assignment, transfer or delivery for
the enforcement of the Lien of this Trust Indenture, whether pursuant to
foreclosure or power of sale, assignments and other instruments as may be
necessary or appropriate, with full power of substitution, the Owner Trustee
hereby ratifying and confirming all that such attorney or any substitute shall
do by virtue hereof in accordance with applicable law. Nevertheless, if so
requested by the Indenture Trustee or any purchaser, the Owner Trustee shall
ratify and confirm any such sale, assignment, transfer or delivery, by executing
and delivering to the Indenture Trustee or such purchaser all bills of sale,
assignments, releases and other proper instruments to effect such ratification
and confirmation as may be designated in any such request.

            SECTION 4.11. Rights of Certificate Holders to Receive Payment.

            Notwithstanding any other provision of this Trust Indenture, the
right of any Certificate Holder to receive payment of principal of, and premium,
if any, and interest on a Secured Certificate on or after the respective due
dates expressed in such Secured Certificate, or


                                      -43-
<PAGE>

to bring suit for the enforcement of any such payment on or after such
respective dates in accordance with the terms hereof, shall not be impaired or
affected without the consent of such Certificate Holder.

                                    ARTICLE V

                         DUTIES OF THE INDENTURE TRUSTEE

            SECTION 5.01. Notice of Event of Default.

            If the Indenture Trustee shall have Actual Knowledge of an Event of
Default or of a Default arising from a failure to pay Rent, the Indenture
Trustee shall give prompt written notice thereof to the Owner Trustee, the Owner
Participant, Lessee, and each Certificate Holder. Subject to the terms of
Sections 4.03, 4.04, 4.08, 5.02 and 5.03 hereof, the Indenture Trustee shall
take such action, or refrain from taking such action, with respect to such Event
of Default or Default (including with respect to the exercise of any rights or
remedies hereunder) as the Indenture Trustee shall be instructed in writing by a
Majority in Interest of Certificate Holders. Subject to the provisions of
Section 5.03, if the Indenture Trustee shall not have received instructions as
above provided within twenty (20) days after mailing notice of such Event of
Default to the Certificate Holders, the Indenture Trustee may, subject to
instructions thereafter received pursuant to the preceding provisions of this
Section 5.01, take such action, or refrain from taking such action, but shall be
under no duty to take or refrain from taking any action, with respect to such
Event of Default or Default as it shall determine advisable in the best
interests of the Certificate Holders; provided, however, that the Indenture
Trustee may not sell the Aircraft or any Engine without the consent of a
majority in interest of Certificate Holders. If the Indenture Trustee shall at
any time declare the Lease to be in default pursuant to Section 15 thereof or
shall elect to foreclose or otherwise enforce this Trust Indenture, the
Indenture Trustee shall forthwith notify the Owner Participant, the Certificate
Holders, the Owner Trustee and Lessee. For all purposes of this Trust Indenture,
in the absence of Actual Knowledge on the part of the Indenture Trustee, the
Owner Trustee or the Owner Participant, the Indenture Trustee, the Owner Trustee
or the Owner Participant, as the case may be, shall not be deemed to have
knowledge of a Default or an Event of Default (except, in the case of the
Indenture Trustee, the failure of Lessee to pay any installment of Basic Rent
within one (1) Business Day after the same shall become due, if any portion of
such installment was then required to be paid to the Indenture Trustee, which
failure shall constitute knowledge of a Default) unless notified in writing by
Lessee, the Owner Trustee, the Owner Participant or one or more Certificate
Holders.

            SECTION 5.02. Action upon Instructions; Certain Rights and
Limitations.

            (a) Subject to the terms of Sections 2.14, 4.03, 4.04(a), 4.08, 5.01
and 5.03 hereof, upon the written instructions at any time and from time to time
of a Majority in Interest of Certificate Holders, the Indenture Trustee shall,
subject to the terms of this Section 5.02, take such of the following actions as
may be specified in such instructions: (i) give such notice or direction or
exercise such right, remedy or power hereunder as shall be specified in such
instructions; (ii) give such notice or direction or exercise such right, remedy
or power under the Lease, the Participation Agreement, the Purchase Agreement,
or any other part of the Trust Indenture Estate as shall be specified in such
instructions; and (iii) after the occurrence and


                                      -44-
<PAGE>

during the continuance of an Event of Default, approve as satisfactory to the
Indenture Trustee all matters required by the terms of the Lease to be
satisfactory to the Owner Trustee, it being understood that without the written
instructions of a Majority in Interest of Certificate Holders, the Indenture
Trustee shall not approve any such matter as satisfactory to the Indenture
Trustee; provided, that anything contained in this Trust Indenture, the Lease or
the other Operative Documents to the contrary notwithstanding:

            (1) the Owner Trustee or the Owner Participant may, without the
      consent of the Indenture Trustee, demand, collect, sue for or otherwise
      obtain all amounts included in Excluded Payments from Lessee or the
      Guarantor, exercise any election or option or make any decision or
      determination or to give or receive any notice, consent, waiver or
      approval in respect of any Excluded Payment and seek legal or equitable
      remedies to require Lessee or the Guarantor to maintain the insurance
      coverage referred to in Section 11 of the Lease; provided, that the rights
      referred to in this clause (1) shall not be deemed to include the exercise
      of any remedies provided for in Section 15 of the Lease other than the
      right to proceed by appropriate court action, either at law or in equity,
      to enforce payment by Lessee or the Guarantor of such amounts included in
      Excluded Payments or performance by Lessee or the Guarantor of such
      insurance covenant, or to recover damages for the breach thereof or for
      specific performance of any covenant of Lessee or the Guarantor;

            (2) unless an Event of Default and an Indenture Trustee Event shall
      have occurred and be continuing and except as provided in clause (4)
      below, the Indenture Trustee shall not, without the consent of the Owner
      Trustee, which consent shall not be withheld if no right or interest of
      the Owner Trustee or the Owner Participant shall be diminished or impaired
      thereby, (i) enter into, execute and deliver amendments, modifications,
      waivers or consents in respect of any of the provisions of the Lease, or
      (ii) approve any accountants, engineers, appraisers or counsel as
      satisfactory to render services for or issue opinions to the Owner Trustee
      pursuant to the Operative Documents; provided that, whether or not an
      Event of Default shall have occurred and be continuing, no amendment,
      modification, waiver or consent in respect of the Lease shall affect the
      amount or timing of, or the right to enforce payment of, any Excluded
      Payment;

            (3) whether or not a Default or Event of Default under the Trust
      Indenture has occurred and is continuing, the Owner Trustee and the Owner
      Participant shall have the right, together with the Indenture Trustee, (i)
      to receive from Lessee all notices, certificates, reports, filings,
      opinions of counsel and other documents and all information which any
      thereof is permitted or required to give or furnish to the Owner Trustee
      or Lessor pursuant to any Operative Document (including pursuant to
      Section 7(b) of the Participation Agreement), (ii) to exercise inspection
      rights pursuant to Section 12 of the Lease, (iii) to retain all rights
      with respect to insurance maintained for its own account which Section
      11(e) of the Lease specifically confers on Lessor or the Owner
      Participant, (iv) to exercise, to the extent necessary to enable it to
      exercise its rights under Section 4.03 hereof, the rights of Lessor under
      Section 21 of the Lease and (v) to give notices of default under Section
      14 of the Lease;


                                      -45-
<PAGE>

            (4) whether or not a Default or Event of Default under the Trust
      Indenture has occurred and is continuing, the Owner Trustee shall have the
      right to the exclusion of the Indenture Trustee to adjust Rent, Stipulated
      Loss Values and Termination Values as provided in Section 3(d) of the
      Lease and to select counsel with respect to any opinion relating to tax
      matters to be delivered solely to the Owner Participant;

            (5) whether or not a Default or Event of Default under the Trust
      Indenture has occurred and is continuing, the Owner Trustee may, without
      the consent of the Indenture Trustee, (i) solicit and make bids with
      respect to the Aircraft under Section 9 of the Lease in respect of a
      termination of the Lease by Lessee pursuant to Section 9 thereof, (ii)
      determine "fair market sales value" and "fair market rental value" under
      Section 19 of the Lease for all purposes except following an Event of
      Default pursuant to Section 15 of the Lease, and (iii) make an election
      pursuant to and in accordance with the provisions of Section 9(c) of the
      Lease; and

            (6) so long as no Event of Default shall have occurred and be
      continuing, except as provided in clauses (2) and (3) above, all rights of
      the "Lessor" under the Lease shall be exercised by the Owner Trustee to
      the exclusion of the Indenture Trustee including, without limitation, the
      right to (i) exercise all rights with respect to Lessee's use and
      operation, modification or maintenance of the Aircraft and any Engine
      which the Lease specifically confers on Lessor, and (ii) consent to and
      approve any assignment pursuant to Section 13 of the Lease; provided that
      the foregoing shall not limit (A) any rights separately granted to the
      Indenture Trustee under the Operative Documents or (B) the right of the
      Indenture Trustee to receive any funds to be delivered to the "Lessor"
      under the Lease (except with respect to Excluded Payments) and under the
      Purchase Agreement.

            Notwithstanding anything to the contrary contained herein, the
Indenture Trustee shall have the right, to the exclusion of the Owner Trustee
and the Owner Participant, to (A) declare the Lease to be in default under
Section 15 thereof and (B) subject only to the provisions of Sections 4.03,
4.04(a) and 2.14 hereof, exercise the remedies set forth in such Section 15
(other than in connection with Excluded Payments) at any time that a Lease Event
of Default shall have occurred and be continuing.

            The Indenture Trustee will execute and the Owner Trustee will file
or cause to be filed such continuation statements with respect to financing
statements relating to the security interest created hereunder in the Trust
Indenture Estate as specified by Lessee pursuant to Section 8(e) of the
Participation Agreement or as may be specified from time to time in written
instructions of a Majority in Interest of Certificate Holders (which
instructions may, by their terms, be operative only at a future date and which
shall be accompanied by the form of such continuation statement so to be filed).
The Indenture Trustee will furnish to each Certificate Holder (and, during the
continuation of an Indenture Trustee Event, to the Owner Trustee and Owner
Participant), promptly upon receipt thereof, duplicates or copies of all
reports, notices, requests, demands, certificates and other instruments
furnished to the Indenture Trustee under the Lease or hereunder, including,
without limitation, a copy of any Termination Notice (as defined in the Lease)
and a copy of each report or notice received pursuant to Sections 9(a) and 11(c)
of


                                      -46-
<PAGE>

the Lease, respectively, to the extent that the same shall not have been
furnished to such Certificate Holder pursuant hereto or to the Lease.

            (b) If any Lease Event of Default shall have occurred and be
continuing and the Owner Trustee shall not have cured fully such Lease Event of
Default under and in accordance with Section 4.03 hereof, on request of a
Majority in Interest of Certificate Holders, the Indenture Trustee shall declare
the Lease to be in default pursuant to Section 15 thereof and exercise those
remedies specified by such Certificate Holders. The Indenture Trustee agrees to
provide to the Certificate Holders, the Owner Trustee, the Owner Participant and
Lessee concurrently with such declaration by the Indenture Trustee, notice of
such declaration by the Indenture Trustee.

            SECTION 5.03. Indemnification.

            The Indenture Trustee shall not be under any obligation to take any
action under this Trust Indenture and nothing herein or therein shall require
the Indenture Trustee to expend or risk its own funds or otherwise incur the
risk of any financial liability in the performance of any of its rights or
powers if it shall have reasonable grounds for believing that repayment of such
funds or adequate indemnity against such risk or liability is not reasonably
assured to it (the written indemnity of any Certificate Holder who is a QIB,
signed by an authorized officer thereof, in favor of, delivered to and in form
reasonably satisfactory to Indenture Trustee shall be accepted as reasonable
assurance of adequate indemnity). The Indenture Trustee shall not be required to
take any action under Section 5.01 (other than the first sentence thereof) or
5.02 or Article IV hereof, nor shall any other provision of this Trust Indenture
or any other Operative Document be deemed to impose a duty on the Indenture
Trustee to take any action, if the Indenture Trustee shall have been advised by
counsel that such action is contrary to the terms hereof or of the Lease or is
otherwise contrary to Law.

            SECTION 5.04. No Duties Except as Specified in Trust Indenture or
Instructions.

            The Indenture Trustee shall not have any duty or obligation to use,
operate, store, lease, control, manage, sell, dispose of or otherwise deal with
the Aircraft or any other part of the Trust Indenture Estate, or to otherwise
take or refrain from taking any action under, or in connection with, this Trust
Indenture or any part of the Trust Indenture Estate, except as expressly
provided by the terms of this Trust Indenture or as expressly provided in
written instructions from Certificate Holders as provided in this Trust
Indenture; and no implied duties or obligations shall be read into this Trust
Indenture against the Indenture Trustee. The Indenture Trustee agrees that it
will in its individual capacity and at its own cost and expense (but without any
right of indemnity in respect of any such cost or expense under Section 7.01
hereof), promptly take such action as may be necessary duly to discharge all
liens and encumbrances on any part of the Trust Indenture Estate which result
from claims against it in its individual capacity not related to the ownership
of the Aircraft or the administration of the Trust Indenture Estate or any other
transaction pursuant to this Trust Indenture or any document included in the
Trust Indenture Estate.


                                      -47-
<PAGE>

            SECTION 5.05. No Action Except Under Lease, Trust Indenture or
Instructions.

            The Owner Trustee and the Indenture Trustee agree that they will not
use, operate, store, lease, control, manage, sell, dispose of or otherwise deal
with the Aircraft or any other part of the Trust Indenture Estate except (i) as
required by the terms of the Lease or (ii) in accordance with the powers granted
to, or the authority conferred upon, the Owner Trustee and the Indenture Trustee
pursuant to this Trust Indenture and in accordance with the express terms
hereof.

            SECTION 5.06. Replacement Airframes and Replacement Engines.

            At any time an Airframe or Engine is to be replaced under or
pursuant to Section 10 of the Lease by a Replacement Airframe or Replacement
Engine, the Owner Trustee shall direct the Indenture Trustee to execute and
deliver to the Owner Trustee an appropriate instrument releasing such Airframe
and/or Engine as appropriate from the Lien of this Trust Indenture and the
Indenture Trustee shall execute and deliver such instrument as aforesaid, but
only upon compliance by Lessee with the applicable provisions of Section 10 of
the Lease and upon receipt by or deposit with the Indenture Trustee of the
following:

            (1) A written request from the Owner Trustee, requesting such
release specifically describing the Airframe and/or Engine(s) so to be released.

            (2) A certificate signed by a duly authorized officer of Lessee
stating the following:

            A.    With respect to the Replacement of any Airframe:

                  (i)   a description of the Airframe which shall be identified
                        by manufacturer, model, FAA registration number (or
                        other applicable registration information) and
                        manufacturer's serial number;

                  (ii)  a description of the Replacement Airframe to be received
                        (including the manufacturer, model, FAA registration
                        number (or other applicable registration information)
                        and manufacturer's serial number) as consideration for
                        the Airframe to be released;

                  (iii) that the Replacement Airframe is of the same or an
                        improved model as the Airframe requested to be released
                        from this Indenture;

                  (iv)  the value, utility and remaining useful life (without
                        regard to hours or cycles) of the Replacement Airframe
                        as of the date of such certificate (which in the
                        judgment of Lessee shall be not less than the value,
                        utility and remaining useful life (without


                                      -48-
<PAGE>

                        regard to hours or cycles) of the Airframe requested to
                        be released (assuming no Event of Loss and that such
                        Airframe was in the condition and repair required to be
                        maintained under the Lease)); and

                  (v)   that no Lease Event of Default and no event which, with
                        lapse of time or notice, or both, would become a Lease
                        Event of Default, has occurred which has not been
                        remedied or waived, and that Lessee will not be in
                        default, by the making and granting of the request for
                        release and the addition of a Replacement Airframe, in
                        the performance of any of the terms and covenants of the
                        Lease.

            B.    with respect to the replacement of any Engine:

                  (i)   a description of the Engine which shall be identified by
                        manufacturer's serial number;

                  (ii)  a description of the Replacement Engine (including the
                        manufacturer's name and serial number) as consideration
                        for the Engine to be released;

                  (iii) that such Replacement Engine is substantially the same
                        as the Engine to be released (or an improved model);

                  (iv)  the value, utility and remaining useful life (without
                        regard to hours or cycles) of the Replacement Engine as
                        of the date of such certificate (which value shall not
                        be less than the value, utility and remaining useful
                        life (without regard to hours or cycles) of the Engine
                        to be released (assuming no Event of Loss and that such
                        Engine was in the condition and repair required to be
                        maintained under the Lease));

                  (v)   that each of the conditions specified in Section 10(b)
                        of the Lease with respect to such Replacement Engine
                        have been satisfied; and

                  (vi)  that, with respect to the replacement of an Engine
                        pursuant to Section 9(d) of the Lease, no Lease Event of
                        Default and no Lease Default has occurred which has not
                        been remedied or waived.

            (3) (a) The appropriate instruments (i) transferring to the Owner
Trustee title to the Replacement Airframe or Replacement Engine to be received
as consideration for the


                                      -49-
<PAGE>

Airframe or Engine to be released and (ii) assigning to the Owner Trustee the
benefit of all manufacturer's and vendor's warranties generally available with
respect to such Replacement Airframe or Replacement Engine, and a Trust
Agreement and Indenture Supplement subjecting such Replacement Airframe or
Replacement Engine and any related warranty rights to the lien of this
Indenture.

                  (b) With respect to the replacement of any Engine, such
Uniform Commercial Code financing statements covering the lien created by this
Indenture as deemed necessary or desirable by counsel for the Indenture Trustee
to protect the lien under the Indenture in the Replacement Engine.

            (4) A certificate from either an aircraft engineer (who may be an
employee of Lessee) or a firm of independent aircraft appraisers selected by
Lessee confirming the accuracy of the information set forth in clause (2)A(iv)
of this Section 5.06.

            (5) The opinion of in-house counsel to Lessee, or other counsel
satisfactory to the Indenture Trustee, stating that the Replacement Airframe or
Replacement Engine has been validly subjected to the lien of this Indenture and
covered by the Lease, the instruments subjecting such Replacement Airframe or
Replacement Engine to the Lease and to the Lien of this Trust Indenture, as the
case may be, have been duly filed for recordation pursuant to the Federal
Aviation Act or any other law then applicable to the registration of the
Aircraft, and no further action, filing or recording of any document is
necessary or advisable in order to establish and perfect the right, title,
estate and interest of the Owner Trustee to and the lien of this Trust Indenture
on such Replacement Aircraft or Replacement Engine.

            SECTION 5.07. Indenture Supplements for Replacements.

            If a Replacement Airframe or Replacement Engine is being substituted
as contemplated by Section 10 of the Lease, the Owner Trustee and the Indenture
Trustee agree for the benefit of the Certificate Holders and Lessee, subject to
fulfillment of the conditions precedent and compliance by Lessee with its
obligations set forth in Section 10 of the Lease and the requirements of Section
5.06 hereof with respect to such Replacement Airframe or Replacement Engine, to
execute and deliver a Lease Supplement and a Trust Agreement and Indenture
Supplement, as applicable, as contemplated by Section 10 of the Lease.

            SECTION 5.08. Effect of Replacement.

            In the event of the substitution of an Airframe or of a Replacement
Engine pursuant to Section 10 of the Lease, (a) all provisions of this Trust
Indenture relating to the Airframe or Engine or Engines being replaced shall be
applicable to such Replacement Airframe or Replacement Engine or Engines with
the same force and effect as if such Replacement Airframe or Replacement Engine
or Engines were the same airframe or engine or engines, as the case may be, as
the Airframe or Engine or Engines being replaced but for the Event of Loss with
respect to the Airframe or Engine or Engines being replaced, and (b) the
provisions of this Trust Indenture shall no longer be applicable to the Airframe
or Engine or Engines being replaced, which shall be released from the Lien of
this Indenture.


                                      -50-
<PAGE>

            SECTION 5.09. Investment of Amounts Held by Indenture Trustee.

            Any amounts held by the Indenture Trustee as assignee of the Owner
Trustee's rights to hold monies for security pursuant to Section 22(a) of the
Lease shall be held in accordance with the terms of such Section and the
Indenture Trustee agrees, for the benefit of Lessee, to perform the duties of
the Owner Trustee under such Section. Any amounts held by the Indenture Trustee
pursuant to the proviso to the first sentence of Section 3.01, pursuant to
Section 3.02, or pursuant to any provision of any other Operative Document
providing for amounts to be held by the Indenture Trustee which are not
distributed pursuant to the other provisions of Article III hereof shall be
invested by the Indenture Trustee from time to time in Cash Equivalents as
directed by the Owner Trustee in the case of amounts held pursuant to the
proviso to the first sentence of Section 3.01 and otherwise by Lessee so long as
the Indenture Trustee may acquire the same using its best efforts. Unless
otherwise expressly provided in this Trust Indenture, any income realized as a
result of any such investment, net of the Indenture Trustee's reasonable fees
and expenses in making such investment, shall be held and applied by the
Indenture Trustee in the same manner as the principal amount of such investment
is to be applied and any losses, net of earnings and such reasonable fees and
expenses, shall be charged against the principal amount invested. The Indenture
Trustee shall not be liable for any loss resulting from any investment required
to be made by it under this Trust Indenture other than by reason of its willful
misconduct or gross negligence, and any such investment may be sold (without
regard to its maturity) by the Indenture Trustee without instructions whenever
such sale is necessary to make a distribution required by this Trust Indenture.

                                   ARTICLE VI

                   THE OWNER TRUSTEE AND THE INDENTURE TRUSTEE

            SECTION 6.01. Acceptance of Trusts and Duties.

            The Indenture Trustee accepts the duties hereby created and
applicable to it and agrees to perform the same but only upon the terms of this
Trust Indenture and agrees to receive and disburse all monies constituting part
of the Trust Indenture Estate in accordance with the terms hereof. The Owner
Trustee, in its individual capacity, and the Indenture Trustee, in its
individual capacity, shall not be answerable or accountable under any
circumstances, except (i) for their own willful misconduct or gross negligence
(other than for the handling of funds, for which the standard of accountability
shall be willful misconduct or negligence), (ii) in the case of the Indenture
Trustee, as provided in the fourth sentence of Section 2.04(a) hereof and the
last sentence of Section 5.04 hereof, and (iii) for liabilities that may result,
in the case of the Owner Trustee, from the inaccuracy of any representation or
warranty of the Owner Trustee expressly made in its individual capacity in the
Participation Agreement or in Section 4.01(b) or 6.03 hereof (or in any
certificate furnished to the Indenture Trustee or any Certificate Holder in
connection with the transactions contemplated by the Operative Documents) or, in
the case of the Indenture Trustee (in its individual capacity), from the
inaccuracy of any representation or warranty of the Indenture Trustee (in its
individual capacity) in the Participation Agreement or expressly made hereunder.
Neither the Owner Trustee nor the Indenture Trustee shall be liable for any
action or inaction of the other or of the Owner Participant.


                                      -51-
<PAGE>

            SECTION 6.02. Absence of Duties.

            In the case of the Indenture Trustee, except in accordance with
written instructions furnished pursuant to Section 5.01 or 5.02 hereof, and
except as provided in, and without limiting the generality of, Sections 5.03 and
5.04 hereof and, in the case of the Owner Trustee, except as provided in Section
4.01(b) hereof, the Owner Trustee and the Indenture Trustee shall have no duty
(i) to see to any registration of the Aircraft or any recording or filing of the
Lease or of this Trust Indenture or any other document, or to see to the
maintenance of any such registration, recording or filing, (ii) to see to any
insurance on the Aircraft or to effect or maintain any such insurance, whether
or not Lessee shall be in default with respect thereto, (iii) to see to the
payment or discharge of any lien or encumbrance of any kind against any part of
the Trust Estate or the Trust Indenture Estate, (iv) to confirm, verify or
inquire into the failure to receive any financial statements from Lessee, or (v)
to inspect the Aircraft at any time or ascertain or inquire as to the
performance or observance of any of Lessee's covenants under the Lease with
respect to the Aircraft. The Owner Participant shall not have any duty or
responsibility hereunder, including, without limitation, any of the duties
mentioned in clauses (i) through (v) above; provided, that nothing contained in
this sentence shall limit any obligations of the Owner Participant under the
Participation Agreement or relieve the Owner Participant from any restriction
under Section 4.03 hereof.

            SECTION 6.03. No Representations or Warranties as to Aircraft or
Documents.

            NEITHER THE INDENTURE TRUSTEE IN ITS INDIVIDUAL OR TRUST CAPACITY
NOR THE OWNER TRUSTEE IN ITS INDIVIDUAL CAPACITY OR AS OWNER TRUSTEE UNDER THE
TRUST AGREEMENT, NOR THE OWNER PARTICIPANT MAKES OR SHALL BE DEEMED TO HAVE MADE
AND EACH HEREBY EXPRESSLY DISCLAIMS ANY REPRESENTATION OR WARRANTY, EXPRESS OR
IMPLIED, AS TO THE TITLE, AIRWORTHINESS, VALUE, COMPLIANCE WITH SPECIFICATIONS,
CONDITION, DESIGN, QUALITY, DURABILITY, OPERATION, MERCHANTABILITY OR FITNESS
FOR USE FOR A PARTICULAR PURPOSE OF THE AIRCRAFT OR ANY ENGINE, AS TO THE
ABSENCE OF LATENT OR OTHER DEFECTS, WHETHER OR NOT DISCOVERABLE, AS TO THE
ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK OR COPYRIGHT, AS TO THE
ABSENCE OF OBLIGATIONS BASED ON STRICT LIABILITY IN TORT OR ANY OTHER
REPRESENTATION OR WARRANTY WHATSOEVER, except the Owner Trustee in its
individual capacity warrants that (i) the Owner Trustee has received on the
Delivery Date whatever title was conveyed to it by Lessee, and (ii) the Aircraft
is free and clear of Lessor Liens (including for this purpose Liens which would
be Lessor Liens but for the proviso in the definition of Lessor Liens)
attributable to the Owner Trustee in its individual capacity. Neither the Owner
Trustee, in its individual capacity or as Owner Trustee under the Trust
Agreement, nor the Indenture Trustee, in its individual or trust capacities,
makes or shall be deemed to have made any representation or warranty as to the
validity, legality or enforceability of this Trust Indenture, the Trust
Agreement, the Participation Agreement, the Secured Certificates, the Lease, the
Purchase Agreement, the Purchase Agreement Assignment, the Consent and Agreement
or the Guarantee, or as to the correctness of any statement contained in any
thereof, except for the representations and warranties of the Owner Trustee made
in its individual capacity and the


                                      -52-
<PAGE>

representations and warranties of the Indenture Trustee, in each case expressly
made in this Trust Indenture or in the Participation Agreement. The Loan
Participants, the Certificate Holders and the Owner Participant make no
representation or warranty hereunder whatsoever.

            SECTION 6.04. No Segregation of Monies; No Interest.

            Any monies paid to or retained by the Indenture Trustee pursuant to
any provision hereof and not then required to be distributed to the Certificate
Holders, Lessee or the Owner Trustee as provided in Article III hereof need not
be segregated in any manner except to the extent required by Law or Section
10(f) or 11(g) of the Lease and Section 5.09 hereof, and may be deposited under
such general conditions as may be prescribed by Law, and the Indenture Trustee
shall not be liable for any interest thereon (except that the Indenture Trustee
shall invest all monies held as directed by Lessee so long as no Lease Event of
Default or Lease Default has occurred and is continuing (or in the absence of
such direction, by the Majority In Interest of Certificate Holders) in Cash
Equivalents; provided, however, that any payments received, or applied
hereunder, by the Indenture Trustee shall be accounted for by the Indenture
Trustee so that any portion thereof paid or applied pursuant hereto shall be
identifiable as to the source thereof.

            SECTION 6.05. Reliance; Agreements; Advice of Counsel.

            Neither the Owner Trustee nor the Indenture Trustee shall incur any
liability to anyone in acting upon any signature, instrument, notice,
resolution, request, consent, order, certificate, report, opinion, bond or other
document or paper believed by it to be genuine and believed by it to be signed
by the proper party or parties. The Owner Trustee and the Indenture Trustee may
accept a copy of a resolution of the Board of Directors (or, in the case of the
Owner Participant which originally executed the Participation Agreement,
evidence of the approval by the Executive Committee thereof) of any party to the
Participation Agreement, certified by the Secretary or an Assistant Secretary
thereof as duly adopted and in full force and effect, as conclusive evidence
that such resolution has been duly adopted and that the same is in full force
and effect. As to the aggregate unpaid Principal Amount of Secured Certificates
outstanding as of any date, the Owner Trustee may for all purposes hereof rely
on a certificate signed by any Vice President or other authorized corporate
trust officer of the Indenture Trustee. As to any fact or matter relating to
Lessee the manner of ascertainment of which is not specifically described
herein, the Owner Trustee and the Indenture Trustee may for all purposes hereof
rely on a certificate, signed by a duly authorized officer of Lessee, as to such
fact or matter, and such certificate shall constitute full protection to the
Owner Trustee and the Indenture Trustee for any action taken or omitted to be
taken by them in good faith in reliance thereon. The Indenture Trustee shall
assume, and shall be fully protected in assuming, that the Owner Trustee is
authorized by the Trust Agreement to enter into this Trust Indenture and to take
all action to be taken by it pursuant to the provisions hereof, and shall not
inquire into the authorization of the Owner Trustee with respect thereto. In the
administration of the trusts hereunder, the Owner Trustee and the Indenture
Trustee each may execute any of the trusts or powers hereof and perform its
powers and duties hereunder directly or through agents or attorneys and may at
the expense of the Trust Indenture Estate, consult with counsel, accountants and
other skilled persons to be selected and retained by it, and the Owner Trustee
and the Indenture Trustee shall


                                      -53-
<PAGE>

not be liable for anything done, suffered or omitted in good faith by them in
accordance with the written advice or written opinion of any such counsel,
accountants or other skilled persons.

            SECTION 6.06. Capacity in Which Acting.

            The Owner Trustee acts hereunder solely as trustee as herein and in
the Trust Agreement provided, and not in its individual capacity, except as
otherwise expressly provided herein, in the Trust Agreement and in the
Participation Agreement.

            SECTION 6.07. Compensation.

            The Indenture Trustee shall be entitled to reasonable compensation,
including expenses and disbursements (including the reasonable fees and expenses
of counsel), for all services rendered hereunder and shall, on and subsequent to
an Event of Default hereunder, have a priority claim on the Trust Indenture
Estate for the payment of such compensation, to the extent that such
compensation shall not be paid by Lessee, and shall have the right, on and
subsequent to an Event of Default hereunder, to use or apply any monies held by
it hereunder in the Trust Indenture Estate toward such payments. The Indenture
Trustee agrees that it shall have no right against the Loan Participants, the
Certificate Holders, the Owner Trustee or the Owner Participant for any fee as
compensation for its services as trustee under this Trust Indenture.

            SECTION 6.08. Instructions from Certificate Holders.

            In the administration of the trusts created hereunder, the Indenture
Trustee shall have the right to seek instructions from a Majority in Interest of
Certificate Holders should any provision of this Trust Indenture appear to
conflict with any other provision herein or should the Indenture Trustee's
duties or obligations hereunder be unclear, and the Indenture Trustee shall
incur no liability in refraining from acting until it receives such
instructions. The Indenture Trustee shall be fully protected for acting in
accordance with any instructions received under this Section 6.08.

                                   ARTICLE VII

          INDEMNIFICATION OF THE INDENTURE TRUSTEE BY THE OWNER TRUSTEE

            SECTION 7.01. Scope of Indemnification.

            The Owner Trustee, not in its individual capacity, but solely as
Owner Trustee, hereby agrees, except as otherwise provided in Section 2.03
hereof, to assume liability for, and does hereby indemnify, protect, save and
keep harmless the Indenture Trustee (in its individual and trust capacities),
and its successors, assigns, agents and servants, from and against any and all
liabilities, obligations, losses, damages, penalties, taxes (excluding any taxes
payable by the Indenture Trustee on or measured by any compensation received by
the Indenture Trustee for its services under this Trust Indenture), claims,
actions, suits, costs, expenses or disbursements (including reasonable legal
fees and expenses) of any kind and nature whatsoever, which may be imposed on,
incurred by or asserted against the Indenture Trustee (whether or not also
indemnified against by any other Person under any other document) in any way
relating to or


                                      -54-
<PAGE>

arising out of this Trust Indenture or any other Operative Document to which it
is a party or the enforcement of any of the terms of any thereof, or in any way
relating to or arising out of the manufacture, purchase, acceptance,
non-acceptance, rejection, ownership, delivery, lease, possession, use,
operation, condition, sale, return or other disposition of the Aircraft or any
Engine (including, without limitation, latent or other defects, whether or not
discoverable, and any claim for patent, trademark or copyright infringement), or
in any way relating to or arising out of the administration of the Trust
Indenture Estate or the action or inaction of the Indenture Trustee hereunder,
to the extent not reimbursed by Lessee. Without limiting the foregoing, the
Indenture Trustee agrees that, prior to seeking indemnification from the Trust
Indenture Estate, it will demand, and take such action as it may in its
discretion determine to be reasonable to pursue, indemnification available to
the Indenture Trustee under the Lease or the Participation Agreement.
Notwithstanding the foregoing, the Indenture Trustee shall not be entitled to
any indemnification for any Taxes or Expenses to the extent relating to or
arising from the willful misconduct or gross negligence (or negligence in the
case of handling funds) of the Indenture Trustee in the performance of its
duties hereunder or resulting from the inaccuracy of any representation or
warranty of the Indenture Trustee (in its individual capacity) referred to in
Section 6.03 hereof, or as provided in Section 6.01 hereof or in the last
sentence of Section 5.04 hereof, or as otherwise excluded by the terms of
Sections 7(b) and 7(c) of the Participation Agreement from Lessee's indemnities
under such Sections. In addition, if necessary, the Indenture Trustee shall be
entitled to indemnification from the Trust Indenture Estate for any liability,
obligation, loss, damage, penalty, claim, action, suit, cost, expense or
disbursement indemnified against pursuant to this Section 7.01 to the extent not
reimbursed by Lessee or others, but without releasing any of them from their
respective agreements of reimbursement; and to secure the same the Indenture
Trustee shall have a prior Lien on the Trust Indenture Estate.

                                  ARTICLE VIII

                         SUCCESSOR AND SEPARATE TRUSTEES

            SECTION 8.01. Notice of Successor Owner Trustee.

            In the case of any appointment of a successor to the Owner Trustee
pursuant to the Trust Agreement including upon any merger, conversion,
consolidation or sale of substantially all of the corporate trust business of
the Owner Trustee pursuant to the Trust Agreement, the successor Owner Trustee
shall give prompt written notice thereof to the Indenture Trustee, Lessee and
the Certificate Holders.

            SECTION 8.02. Resignation of Indenture Trustee; Appointment of
Successor.

            (a) The Indenture Trustee or any successor thereto may resign at any
time without cause by giving at least 30 days' prior written notice to Lessee,
the Owner Trustee, the Owner Participant and each Certificate Holder, such
resignation to be effective upon the acceptance of the trusteeship by a
successor Indenture Trustee. In addition, a Majority in Interest of Certificate
Holders may at any time (but only with the consent of Lessee, which consent
shall not be unreasonably withheld, except that such consent shall not be
necessary if a Lease Event of


                                      -55-
<PAGE>

Default is continuing) remove the Indenture Trustee without cause by an
instrument in writing delivered to the Owner Trustee, Lessee, the Owner
Participant and the Indenture Trustee, and the Indenture Trustee shall promptly
notify each Certificate Holder thereof in writing, such removal to be effective
upon the acceptance of the trusteeship by a successor Indenture Trustee. In the
case of the resignation or removal of the Indenture Trustee, a Majority in
Interest of Certificate Holders may appoint a successor Indenture Trustee by an
instrument signed by such holders, which successor, so long as no Lease Event of
Default shall have occurred and be continuing, shall be subject to Lessee's
reasonable approval. If a successor Indenture Trustee shall not have been
appointed within 30 days after such notice of resignation or removal, the
Indenture Trustee, the Owner Trustee, the Owner Participant or any Certificate
Holder may apply to any court of competent jurisdiction to appoint a successor
Indenture Trustee to act until such time, if any, as a successor shall have been
appointed as above provided. The successor Indenture Trustee so appointed by
such court shall immediately and without further act be superseded by any
successor Indenture Trustee appointed as above provided.

            (b) Any successor Indenture Trustee, however appointed, shall
execute and deliver to the Owner Trustee, the predecessor Indenture Trustee and
Lessee an instrument accepting such appointment and assuming the obligations of
the Indenture Trustee under the Participation Agreement arising from and after
the time of such appointment, and thereupon such successor Indenture Trustee,
without further act, shall become vested with all the estates, properties,
rights, powers and duties of the predecessor Indenture Trustee hereunder in the
trust hereunder applicable to it with like effect as if originally named the
Indenture Trustee herein; but nevertheless upon the written request of such
successor Indenture Trustee, such predecessor Indenture Trustee shall execute
and deliver an instrument transferring to such successor Indenture Trustee, upon
the trusts herein expressed applicable to it, all the estates, properties,
rights and powers of such predecessor Indenture Trustee, and such predecessor
Indenture Trustee shall duly assign, transfer, deliver and pay over to such
successor Indenture Trustee all monies or other property then held by such
predecessor Indenture Trustee hereunder.

            (c) Any successor Indenture Trustee, however appointed, shall be a
bank or trust company having its principal place of business in the Borough of
Manhattan, City and State of New York; Minneapolis, Minnesota; Chicago,
Illinois; Hartford, Connecticut; Wilmington, Delaware; or Boston, Massachusetts
and having (or whose obligations under the Operative Documents are guaranteed by
an affiliated entity having) a combined capital and surplus of at least
$100,000,000, if there be such an institution willing, able and legally
qualified to perform the duties of the Indenture Trustee hereunder upon
reasonable or customary terms.

            (d) Any corporation into which the Indenture Trustee may be merged
or converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Indenture Trustee
shall be a party, or any corporation to which substantially all the corporate
trust business of the Indenture Trustee may be transferred, shall, subject to
the terms of paragraph (c) of this Section 8.02, be a successor Indenture
Trustee and the Indenture Trustee under this Trust Indenture without further
act.


                                      -56-
<PAGE>

            SECTION 8.03. Appointment of Additional and Separate Trustees.

            (a) Whenever (i) the Indenture Trustee shall deem it necessary or
desirable in order to conform to any law of any jurisdiction in which all or any
part of the Trust Indenture Estate shall be situated or to make any claim or
bring any suit with respect to or in connection with the Trust Indenture Estate,
this Trust Indenture, any other Indenture Agreement, the Secured Certificates or
any of the transactions contemplated by the Participation Agreement, (ii) the
Indenture Trustee shall be advised by counsel satisfactory to it that it is so
necessary or prudent in the interests of the Certificate Holders (and the
Indenture Trustee shall so advise the Owner Trustee and Lessee), or (iii) the
Indenture Trustee shall have been requested to do so by a Majority in Interest
of Certificate Holders, then in any such case, the Indenture Trustee and, upon
the written request of the Indenture Trustee, the Owner Trustee, shall execute
and deliver an indenture supplemental hereto and such other instruments as may
from time to time be necessary or advisable either (1) to constitute one or more
bank or trust companies or one or more persons approved by the Indenture
Trustee, either to act jointly with the Indenture Trustee as additional trustee
or trustees of all or any part of the Trust Indenture Estate, or to act as
separate trustee or trustees of all or any part of the Trust Indenture Estate,
in each case with such rights, powers, duties and obligations consistent with
this Trust Indenture as may be provided in such supplemental indenture or other
instruments as the Indenture Trustee or a Majority in Interest of Certificate
Holders may deem necessary or advisable, or (2) to clarify, add to or subtract
from the rights, powers, duties and obligations theretofore granted any such
additional and separate trustee, subject in each case to the remaining
provisions of this Section 8.03. If the Owner Trustee shall not have taken any
action requested of it under this Section 8.03(a) that is permitted or required
by its terms within 15 days after the receipt of a written request from the
Indenture Trustee so to do, or if an Event of Default shall have occurred and be
continuing, the Indenture Trustee may act under the foregoing provisions of this
Section 8.03(a) without the concurrence of the Owner Trustee; and the Owner
Trustee hereby irrevocably appoints (which appointment is coupled with an
interest) the Indenture Trustee, its agent and attorney-in-fact to act for it
under the foregoing provisions of this Section 8.03(a) in either of such
contingencies. The Indenture Trustee may, in such capacity, execute, deliver and
perform any such supplemental indenture, or any such instrument, as may be
required for the appointment of any such additional or separate trustee or for
the clarification of, addition to or subtraction from the rights, powers, duties
or obligations theretofore granted to any such additional or separate trustee.
In case any additional or separate trustee appointed under this Section 8.03(a)
shall die, become incapable of acting, resign or be removed, all the assets,
property, rights, powers, trusts, duties and obligations of such additional or
separate trustee shall revert to the Indenture Trustee until a successor
additional or separate trustee is appointed as provided in this Section 8.03(a).

            (b) No additional or separate trustee shall be entitled to exercise
any of the rights, powers, duties and obligations conferred upon the Indenture
Trustee in respect of the custody, investment and payment of monies and all
monies received by any such additional or separate trustee from or constituting
part of the Trust Indenture Estate or otherwise payable under any Operative
Document to the Indenture Trustee shall be promptly paid over by it to the
Indenture Trustee. All other rights, powers, duties and obligations conferred or
imposed upon any additional or separate trustee shall be exercised or performed
by the Indenture Trustee and such additional or separate trustee jointly except
to the extent that applicable Law of any jurisdiction in which any particular
act is to be performed renders the Indenture Trustee


                                      -57-
<PAGE>

incompetent or unqualified to perform such act, in which event such rights,
powers, duties and obligations (including the holding of title to all or part of
the Trust Indenture Estate in any such jurisdiction) shall be exercised and
performed by such additional or separate trustee. No additional or separate
trustee shall take any discretionary action except on the instructions of the
Indenture Trustee or a Majority in Interest of Certificate Holders. No trustee
hereunder shall be personally liable by reason of any act or omission of any
other trustee hereunder, except that the Indenture Trustee shall be liable for
the consequences of its lack of reasonable care in selecting, and Indenture
Trustee's own actions in acting with, any additional or separate trustee. Each
additional or separate trustee appointed pursuant to this Section 8.03 shall be
subject to, and shall have the benefit of Articles IV through VIII and Article X
hereof insofar as they apply to the Indenture Trustee. The powers of any
additional or separate trustee appointed pursuant to this Section 8.03 shall not
in any case exceed those of the Indenture Trustee hereunder.

            (c) If at any time the Indenture Trustee shall deem it no longer
necessary or desirable in order to conform to any such law or take any such
action or shall be advised by such counsel that it is no longer so necessary or
desirable in the interest of the Certificate Holders, or in the event that the
Indenture Trustee shall have been requested to do so in writing by a Majority in
Interest of Certificate Holders, the Indenture Trustee and, upon the written
request of the Indenture Trustee, the Owner Trustee, shall execute and deliver
an indenture supplemental hereto and all other instruments and agreements
necessary or proper to remove any additional or separate trustee. The Indenture
Trustee may act on behalf of the Owner Trustee under this Section 8.03(c) when
and to the extent it could so act under Section 8.03(a) hereof. ARTICLE IX

                                   ARTICLE IX

                SUPPLEMENT AND AMENDMENTS TO THIS TRUST INDENTURE
                               AND OTHER DOCUMENTS

            SECTION 9.01. Instructions of Majority; Limitations.

            (a) Except as provided in Section 5.02 hereof, and except with
respect to Excluded Payments, the Owner Trustee agrees it shall not enter into
any amendment of or supplement to the Lease, the Purchase Agreement, the
Purchase Agreement Assignment, the Consent and Agreement or the Guarantee, or
execute and deliver any written waiver or modification of, or consent under, the
terms of the Lease, the Purchase Agreement, the Purchase Agreement Assignment,
the Consent and Agreement or the Guarantee, unless such supplement, amendment,
waiver, modification or consent is consented to in writing by the Indenture
Trustee and a Majority in Interest of Certificate Holders. Anything to the
contrary contained herein notwithstanding, without the necessity of the consent
of any of the Certificate Holders or the Indenture Trustee, (i) any Excluded
Payments payable to the Owner Participant may be modified, amended, changed or
waived in such manner as shall be agreed to by the Owner Participant and Lessee
and (ii) the Owner Trustee and Lessee may enter into amendments of or additions
to the Lease to modify Section 5 (except to the extent that such amendment would
affect the rights or exercise of remedies under Section 15 of the Lease),
Section 9 or Section 19 of the Lease so long as such amendments, modifications
and changes do not and would not affect the time of, or reduce the amount of,
Rent payments until after the payment in full of all Secured Obligations or
otherwise adversely affect the Certificate Holders.


                                      -58-
<PAGE>

            (b) Without limiting the provisions of Section 9.01(a) hereof and
subject to Section 5.02(a)(2)(i) hereof, the Indenture Trustee agrees with the
Certificate Holders that it shall not enter into any amendment, waiver or
modification of, supplement or consent to this Trust Indenture, the Lease, the
Purchase Agreement, the Purchase Agreement Assignment, the Consent and
Agreement, the Guarantee or the Participation Agreement, or any other agreement
included in the Trust Indenture Estate, unless such supplement, amendment,
waiver, modification or consent is consented to in writing by a Majority in
Interest of Certificate Holders, or does not adversely affect the Certificate
Holders, but upon the written request of a Majority in Interest of Certificate
Holders, the Indenture Trustee shall from time to time enter into any such
supplement or amendment, or execute and deliver any such waiver, modification or
consent, as may be specified in such request and as may be (in the case of any
such amendment, supplement or modification), to the extent such agreement is
required, agreed to by the Owner Trustee and Lessee or, as may be appropriate,
the Manufacturer; provided, however, that, without the consent of each holder of
an affected Secured Certificate then outstanding, no such amendment of or
supplement to this Trust Indenture, the Lease, the Purchase Agreement, the
Purchase Agreement Assignment, the Consent and Agreement, the Guarantee or the
Participation Agreement or waiver or modification of the terms of, or consent
under, any thereof, shall (i) modify any of the provisions of this Section 9.01,
or of Sections 2.02, 2.10, 2.11, 2.15, 4.02, 4.04(c), 4.04(d), 5.02 or 5.06
hereof, Section 14 (except to add an Event of Default) of the Lease, the
definitions of "Event of Default", "Default", "Lease Event of Default", "Lease
Default", "Majority in Interest of Certificate Holders", "Make-Whole Amount" or
"Certificate Holder", or the percentage of Certificate Holders required to take
or approve any action hereunder, (ii) reduce the amount, or change the time of
payment or method of calculation of any amount, of Principal Amount, Make-Whole
Amount, if any, or interest with respect to any Secured Certificate, or alter or
modify the provisions of Article III hereof with respect to the order of
priorities in which distribution thereunder shall be made as among the
Certificate Holders, the Owner Trustee and Lessee, (iii) reduce, modify or amend
any indemnities in favor of the Certificate Holders, (iv) consent to any change
in the Trust Indenture or the Lease which would permit redemption of Secured
Certificates earlier than permitted under Section 2.10 or 2.11 hereof or the
purchase of the Secured Certificates other than as permitted by Section 2.14
hereof, (v) modify any of the provisions of Section 3(d)(v) of the Lease, or
modify, amend or supplement the Lease or consent to any assignment of the Lease,
in either case releasing Lessee from its obligations in respect of the payment
of Basic Rent, Stipulated Loss Value or Termination Value for the Aircraft or
altering the absolute and unconditional character of the obligations of Lessee
to pay Rent as set forth in Sections 3 and 18 of the Lease or (vi) permit the
creation of any Lien on the Trust Indenture Estate or any part thereof other
than Permitted Liens or deprive any Certificate Holder of the benefit of the
Lien of this Trust Indenture on the Trust Indenture Estate, except as provided
in connection with the exercise of remedies under Article IV hereof. So long as
no Lease Event of Default has occurred and is continuing, without the consent of
Lessee no amendment or supplement to this Trust Indenture or waiver or
modification of the terms hereof shall adversely affect Lessee.

            (c) At any time after the date hereof, the Owner Trustee and the
Indenture Trustee may enter into one or more agreements supplemental hereto
without the consent of any Certificate Holder for any of the following purposes:
(i) (a) to cure any defect or inconsistency herein or in the Secured
Certificates, or to make any change not inconsistent with the provisions hereof
(provided that such change does not adversely affect the interests of any
Certificate


                                      -59-
<PAGE>

Holder in its capacity solely as Certificate Holder) or (b) to cure any
ambiguity or correct any mistake; (ii) to evidence the succession of another
party as the Owner Trustee in accordance with the terms of the Trust Agreement
or to evidence the succession of a new trustee hereunder pursuant hereto, the
removal of the trustee hereunder or the appointment of any co-trustee or
co-trustees or any separate or additional trustee or trustees; (iii) to convey,
transfer, assign, mortgage or pledge any property to or with the Indenture
Trustee or to make any other provisions with respect to matters or questions
arising hereunder so long as such action shall not adversely affect the
interests of the Certificate Holders in its capacity solely as Certificate
Holder; (iv) to correct or amplify the description of any property at any time
subject to the Lien of this Trust Indenture or better to assure, convey and
confirm unto the Indenture Trustee any property subject or required to be
subject to the Lien of this Trust Indenture, the Airframe or Engines or any
Replacement Airframe or Replacement Engine; (v) to add to the covenants of the
Owner Trustee for the benefit of the Certificate Holders, or to surrender any
rights or power herein conferred upon the Owner Trustee, the Owner Participant
or Lessee; (vi) to add to the rights of the Certificate Holders; and (vii) to
include on the Secured Certificates any legend as may be required by law.

            SECTION 9.02. Trustees Protected.

            If, in the opinion of the institution acting as Owner Trustee under
the Trust Agreement or the institution acting as Indenture Trustee hereunder,
any document required to be executed by it pursuant to the terms of Section 9.01
hereof adversely affects any right, duty, immunity or indemnity with respect to
such institution under this Trust Indenture or the Lease, such institution may
in its discretion decline to execute such document.

            SECTION 9.03. Documents Mailed to Certificate Holders.

            Promptly after the execution by the Owner Trustee or the Indenture
Trustee of any document entered into pursuant to Section 9.01 hereof, the
Indenture Trustee shall mail, by first class mail, postage prepaid, a copy
thereof to Lessee and to each Certificate Holder at its address last set forth
in the Secured Certificate Register, but the failure of the Indenture Trustee to
mail such copies shall not impair or affect the validity of such document.

            SECTION 9.04. No Request Necessary for Lease Supplement or Trust
Agreement and Indenture Supplement.

            No written request or consent of the Indenture Trustee, the
Certificate Holders or the Owner Participant pursuant to Section 9.01 hereof
shall be required to enable the Owner Trustee to enter into any Lease Supplement
specifically required by the terms of the Lease or to execute and deliver a
Trust Agreement and Indenture Supplement specifically required by the terms
hereof.


                                      -60-
<PAGE>

                                   ARTICLE X

                                  MISCELLANEOUS

            SECTION 10.01. Termination of Trust Indenture.

            Upon (or at any time after) payment in full of the Principal Amount
of, Make-Whole Amount, if any, and interest on and all other amounts due under
all Secured Certificates and provided that there shall then be no other Secured
Obligations due to the Certificate Holders and the Indenture Trustee hereunder
or under the Participation Agreement, the Owner Trustee shall direct the
Indenture Trustee to execute and deliver to or as directed in writing by the
Owner Trustee an appropriate instrument releasing the Aircraft and the Engines
from the Lien of this Trust Indenture and releasing the Lease, the Guarantee,
the Purchase Agreement, and the Purchase Agreement Assignment with the Consent
and Agreement attached thereto from the assignment and pledge thereof hereunder
and the Indenture Trustee shall execute and deliver such instrument as aforesaid
and give written notice thereof to Lessee; provided, however, that this Trust
Indenture and the trusts created hereby shall earlier terminate and this Trust
Indenture shall be of no further force or effect upon any sale or other final
disposition by the Indenture Trustee of all property constituting part of the
Trust Indenture Estate and the final distribution by the Indenture Trustee of
all monies or other property or proceeds constituting part of the Trust
Indenture Estate in accordance with the terms hereof. Except as aforesaid
otherwise provided, this Trust Indenture and the trusts created hereby shall
continue in full force and effect in accordance with the terms hereof.

            SECTION 10.02. No Legal Title to Trust Indenture Estate in
Certificate Holders.

            No holder of a Secured Certificate shall have legal title to any
part of the Trust Indenture Estate. No transfer, by operation of law or
otherwise, of any Secured Certificate or other right, title and interest of any
Certificate Holder in and to the Trust Indenture Estate or hereunder shall
operate to terminate this Trust Indenture or entitle such holder or any
successor or transferee of such holder to an accounting or to the transfer to it
of any legal title to any part of the Trust Indenture Estate.

            SECTION 10.03. Sale of Aircraft by Indenture Trustee Is Binding.

            Any sale or other conveyance of the Trust Indenture Estate, or any
part thereof (including any part thereof or interest therein), by the Indenture
Trustee made pursuant to the terms of this Trust Indenture shall bind the
Certificate Holders and shall be effective to transfer or convey all right,
title and interest of the Indenture Trustee, the Owner Trustee, the Owner
Participant and such holders in and to such Trust Indenture Estate or part
thereof. No purchaser or other grantee shall be required to inquire as to the
authorization, necessity, expediency or regularity of such sale or conveyance or
as to the application of any sale or other proceeds with respect thereto by the
Indenture Trustee.


                                      -61-
<PAGE>

            SECTION 10.04. Trust Indenture for Benefit of the Owner Trustee, the
Indenture Trustee, Owner Participant, Lessee and Certificate Holders.

            Nothing in this Trust Indenture, whether express or implied, shall
be construed to give any person other than the Owner Trustee, the Indenture
Trustee, the Owner Participant, Lessee and the Certificate Holders, any legal or
equitable right, remedy or claim under or in respect of this Trust Indenture.

            SECTION 10.05. Notices.

            Unless otherwise expressly specified or permitted by the terms
hereof, all notices, requests, demands, authorizations, directions, consents,
waivers or documents provided or permitted by this Trust Indenture to be made,
given, furnished or filed shall be in writing, personally delivered or mailed by
certified mail, postage prepaid, or by facsimile or confirmed telex, and (i) if
to the Owner Trustee, addressed to it at its office at 79 South Main Street,
Salt Lake City, Utah 84111, Attention: Corporate Trust Department (Telecopy No.
(801) 246-5053), with a copy to the Owner Participant addressed as provided in
clause (iii) below, (ii) if to the Indenture Trustee, addressed to it at its
office at, for U.S. mail at Corporate Trust Department, P.O. Box 778, Boston,
Massachusetts 02102-0778, and for overnight courier at Corporate Trust
Department, 2 Avenue de Lafayette, Boston, Massachusetts 02111-1724 (Telecopy
No. (617) 662-1462), (iii) if to any Participant, Lessee or any Certificate
Holder, addressed to such party at such address as such party shall have
furnished by notice to the Owner Trustee and the Indenture Trustee, or, until an
address is so furnished, addressed to the address of such party (if any) set
forth on the signature pages to the Participation Agreement or in the Secured
Certificate Register. Whenever any notice in writing is required to be given by
the Owner Trustee, any Participant or the Indenture Trustee or any Certificate
Holder or Lessee to any of the other of them, such notice shall be deemed given
and such requirement satisfied when such notice is received, or if such notice
is mailed by certified mail, postage prepaid, three Business Days after being
mailed, addressed as provided above. Any party hereto may change the address to
which notices to such party will be sent by giving notice of such change to the
other parties to this Trust Indenture.

            SECTION 10.06. Severability.

            Any provision of this Trust Indenture which is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof. Any such prohibition or unenforceability in any
particular jurisdiction shall not invalidate or render unenforceable such
provision in any other jurisdiction.

            SECTION 10.07. No Oral Modification or Continuing Waivers.

            No term or provision of this Trust Indenture or the Secured
Certificates may be changed, waived, discharged or terminated orally, but only
by an instrument in writing signed by the Owner Trustee and the Indenture
Trustee, in compliance with Section 9.01 hereof. Any waiver of the terms hereof
or of any Secured Certificate shall be effective only in the specific instance
and for the specific purpose given.


                                      -62-
<PAGE>

            SECTION 10.08. Successors and Assigns.

            All covenants and agreements contained herein shall be binding upon,
and inure to the benefit of, each of the parties hereto and the permitted
successors and assigns of each, all as herein provided. Any request, notice,
direction, consent, waiver or other instrument or action by any Certificate
Holder shall bind the successors and assigns of such holder. This Trust
Indenture and the Trust Indenture Estate shall not be affected by any amendment
or supplement to the Trust Agreement or by any other action taken under or in
respect of the Trust Agreement, except that each reference in this Trust
Indenture to the Trust Agreement shall mean the Trust Agreement as amended and
supplemented from time to time to the extent permitted hereby, thereby and by
the Participation Agreement. Each Certificate Holder by its acceptance of a
Secured Certificate agrees to be bound by this Trust Indenture and all
provisions of the Participation Agreement applicable to a Loan Participant or a
Certificate Holder.

            SECTION 10.09. Headings.

            The headings of the various Articles and sections herein and in the
table of contents hereto are for convenience of reference only and shall not
define or limit any of the terms or provisions hereof.

            SECTION 10.10. Normal Commercial Relations.

            Anything contained in this Trust Indenture to the contrary
notwithstanding, the Owner Trustee, the Indenture Trustee, any Participant or
any bank or other Affiliate of such Participant may conduct any banking or other
financial transactions, and have banking or other commercial relationships, with
Lessee, fully to the same extent as if this Trust Indenture were not in effect,
including without limitation the making of loans or other extensions of credit
to Lessee for any purpose whatsoever, whether related to any of the transactions
contemplated hereby or otherwise.

            SECTION 10.11. Governing Law; Counterpart Form.

            THIS TRUST INDENTURE SHALL IN ALL RESPECTS BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK,
INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. THIS TRUST
INDENTURE IS BEING DELIVERED IN THE STATE OF NEW YORK. This Trust Indenture may
be executed by the parties hereto in separate counterparts (or upon separate
signature pages bound together into one or more counterparts), each of which
when so executed and delivered shall be an original, but all such counterparts
shall together constitute but one and the same instrument.

            SECTION 10.12. Voting By Certificate Holders.

            All votes of the Certificate Holders shall be governed by a vote of
a Majority in Interest of Certificate Holders, except as otherwise provided
herein.


                                      -63-
<PAGE>

            SECTION 10.13. Bankruptcy.

            It is the intention of the parties that the Owner Trustee, as lessor
under the Lease (and the Indenture Trustee as assignee of the Owner Trustee
hereunder), shall be entitled to the benefits of Section 1110 with respect to
the right to take possession of the Aircraft, Airframe, Engines and Parts as
provided in the Lease in the event of a case under Chapter 11 of the Bankruptcy
Code in which Lessee is a debtor, and in any instance where more than one
construction is possible of the terms and conditions hereof or any other
pertinent Operative Document, each such party agrees that a construction which
would preserve such benefits shall control over any construction which would not
preserve such benefits.

            SECTION 10.14. No Action Contrary to Lessee's Rights Under the
Lease.

            Notwithstanding any of the provisions of this Trust Indenture or the
Trust Agreement to the contrary, neither the Indenture Trustee nor the Owner
Trustee will take any action contrary to Lessee's rights under the Lease,
including the right to possession and use of, and the quiet enjoyment of, the
Aircraft, except in accordance with provisions of the Lease.


                                      -64-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Trust
Indenture to be duly executed by their respective officers thereof duly
authorized as of the day and year first above written.

                                        FIRST SECURITY BANK,
                                        NATIONAL ASSOCIATION, not in its
                                        individual capacity, except as expressly
                                        provided herein, but solely as Owner
                                        Trustee,
                                        Owner Trustee

                                        By:
                                            ------------------------------------
                                            Name:
                                            Title:


                                        STATE STREET BANK AND TRUST
                                        COMPANY, not in its individual capacity,
                                        except as expressly provided herein, but
                                        solely as Indenture Trustee,
                                        Indenture Trustee

                                        By:
                                            ------------------------------------
                                            Name:
                                            Title:


                                      -65-
<PAGE>

                                                    ----------------------------
                                                              EXHIBIT A
                                                                 TO
                                                           TRUST INDENTURE
                                                       AND SECURITY AGREEMENT
                                                    ----------------------------

                           TRUST INDENTURE SUPPLEMENT
                                   [NW ____ _]

            This TRUST INDENTURE SUPPLEMENT [NW ____ _], dated [___________]
(herein called this "Trust Indenture Supplement") of FIRST SECURITY BANK,
NATIONAL ASSOCIATION, not in its individual capacity, but solely as Owner
Trustee (herein called the "Owner Trustee") under that certain Trust Agreement
[NW ____ _] dated as of [_______________] (the "Trust Agreement"), between the
Owner Trustee and the Owner Participant named therein.

                              W I T N E S S E T H:

            WHEREAS, the TRUST INDENTURE AND SECURITY AGREEMENT [NW ____ _],
dated as of [_______________] (as amended and supplemented to the date hereof,
the "Trust Indenture") between the Owner Trustee and STATE STREET BANK AND TRUST
COMPANY, as Indenture Trustee (the "Indenture Trustee"), provides for the
execution and delivery of a supplement thereto substantially in the form hereof,
which shall particularly describe the Aircraft, and shall specifically mortgage
such Aircraft to the Indenture Trustee; and

            WHEREAS, the Trust Indenture relates to the Airframe and Engines
described below, and a counterpart of the Trust Indenture is attached hereto and
made a part hereof and this Trust Indenture Supplement, together with such
counterpart of the Trust Indenture, is being filed for recordation on the date
hereof with the FAA as one document;

            NOW, THEREFORE, this Trust Indenture Supplement witnesseth that the
Owner Trustee hereby confirms that the Lien of the Trust Indenture on the Trust
Indenture Estate covers all of the Owner Trustee's right, title and interest in
and to the following described property:


                                  EXHIBIT A-1
<PAGE>

                                    AIRFRAME

            One airframe identified as follows:

                                             FAA
                                         Registration         Manufacturer's
      Manufacturer         Model            Number            Serial Number
   ------------------   -----------   ------------------   ---------------------


together with all of the Owner Trustee's right, title and interest in and to all
Parts of whatever nature, whether now owned or hereinafter acquired and which
are from time to time incorporated or installed in or attached to said airframe.

                                AIRCRAFT ENGINES

            Two aircraft engines, each such engine having 750 or more rated
take-off horsepower or the equivalent thereof, identified as follows:



            Manufacturer            Manufacturer's Model        Serial Number
- ----------------------------     -------------------------   -------------------


together with all of the Owner Trustee's right, title and interest in and to all
Parts of whatever nature, whether now owned or hereafter acquired and which are
from time to time incorporated or installed in or attached to any of such
engines.

            Together with all of the Owner Trustee's right, title and interest
in and to all Parts of whatever nature, which from time to time are included
within the definition of "Airframe" or "Engine", whether now owned or hereafter
acquired, including all substitutions, renewals and replacements of and
additions, improvements, accessions and accumulations to the Airframe and
Engines (other than additions, improvements, accessions and accumulations which
constitute appliances, parts, instruments, appurtenances, accessories,
furnishings or other equipment excluded from the definition of Parts).

            As further security for the obligations referred to above and
secured by the Trust Indenture and hereby, the Owner Trustee has granted,
bargained, sold, assigned, transferred, conveyed, mortgaged, pledged and
confirmed, and does hereby grant, bargain, sell, assign, transfer, convey,
mortgage, pledge and confirm, unto the Indenture Trustee, its successors and
assigns, for the security and benefit of the Loan Participants and of the
Certificate Holders, in the


                                  EXHIBIT A-2
<PAGE>

trust created by the Trust Indenture, all of the right, title and interest of
the Owner Trustee in, to and under the Lease Supplement [of even date herewith]
covering the property described above.

            Notwithstanding any provision hereof, no Excluded Payment shall
constitute security for any of the aforementioned obligations.

            TO HAVE AND TO HOLD all and singular the aforesaid property unto the
Indenture Trustee, its successors and assigns, in trust for the equal and
proportionate benefit and security of the Certificate Holders, except as
provided in Section 2.15 and Article III of the Trust Indenture without any
preference, distinction or priority of any one Secured Certificate over any
other by reason of priority of time of issue, sale, negotiation, date of
maturity thereof or otherwise for any reason whatsoever, and for the uses and
purposes and subject to the terms and provisions set forth in the Trust
Indenture.

            This Trust Indenture Supplement shall be construed as supplemental
to the Trust Indenture and shall form a part thereof. The Trust Indenture is
each hereby incorporated by reference herein and is hereby ratified, approved
and confirmed.

            This Trust Indenture Supplement is being delivered in the State of
New York.

            AND, FURTHER, the Owner Trustee hereby acknowledges that the
Aircraft referred to in this Trust Indenture Supplement and the aforesaid Lease
Supplement has been delivered to the Owner Trustee and is included in the
property of the Owner Trustee covered by all the terms and conditions of the
Trust Agreement, subject to the pledge and mortgage thereof under the Trust
Indenture.


                                  EXHIBIT A-3
<PAGE>

            IN WITNESS WHEREOF, the Owner Trustee has caused this Trust
Indenture Supplement to be duly executed by one of its officers, thereunto duly
authorized, on the day and year first above written.

                                        FIRST SECURITY BANK,
                                        NATIONAL ASSOCIATION,
                                          not in its individual capacity, but
                                          solely as Owner Trustee, Owner Trustee

                                        By:
                                            ------------------------------------
                                            Name:
                                            Title:


                                  EXHIBIT A-4
<PAGE>

                                   SCHEDULE I

                                    Principal Amount          Interest Rate
                                  --------------------      -----------------
Series A ...................           $[_________]               7.575%
Series B ...................           $[_________]               7.950%
Series C ...................           $[_________]               8.304%


                                  SCHEDULE I-1
<PAGE>

                        Secured Certificates Amortization

                                    SERIES A

                               Aircraft: N[_____]

                                                      Percentage of Principal
                    Payment Date                         Amount to be Paid
    --------------------------------------------   -----------------------------


                                  SCHEDULE I-2
<PAGE>

                                    SERIES B

                               Aircraft: N[_____]

                                                      Percentage of Principal
                    Payment Date                         Amount to be Paid
    --------------------------------------------   -----------------------------


                                  SCHEDULE I-3
<PAGE>

                                    SERIES C

                               Aircraft: N[_____]

                                                      Percentage of Principal
                    Payment Date                         Amount to be Paid
    --------------------------------------------   -----------------------------


                                  SCHEDULE I-4
<PAGE>

                                   SCHEDULE II

                          PASS THROUGH TRUST AGREEMENTS

1.    Pass Through Trust Agreement, dated as of June 3, 1999 among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2A, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

2.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2B, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

3.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2C, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.


                                  SCHEDULE II-1



==============================================================================

                          PURCHASE AGREEMENT ASSIGNMENT
                                   [NW ____ _]

                         Dated as of [________ __, ____]

                                     between

                            NORTHWEST AIRLINES, INC.,
                                    Assignor

                                       and

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,
                                    Assignee

                                 ---------------

                   One Airbus Industrie [A320-212] [A319-113]
                                    Aircraft

==============================================================================
<PAGE>

                          PURCHASE AGREEMENT ASSIGNMENT
                                   [NW ____ _]

            This PURCHASE AGREEMENT ASSIGNMENT [NW ____ _], dated as of
[_________ __, ____] between NORTHWEST AIRLINES, INC., a Minnesota corporation
("Assignor"), and FIRST SECURITY BANK, NATIONAL ASSOCIATION, not in its
individual capacity but solely as Owner Trustee ("Assignee") (the "Assignment").

                              W I T N E S S E T H:

            WHEREAS, pursuant to the Purchase Agreement, the Supplier has agreed
to sell and Assignor has agreed to purchase several Airbus Industrie [A320-212]
[A319-113] aircraft, including the Aircraft covered by the Participation
Agreement;

            WHEREAS, pursuant to the Participation Agreement, Assignor has
agreed to sell, and Assignee has agreed to purchase, the Aircraft;

            WHEREAS, pursuant to a Guaranty attached to the Purchase Agreement
(such guaranty, together with all amendments, waivers and consents heretofore
entered into and heretofore granted thereunder, the "Guaranty") of Airbus
Industrie, a groupement d'interet economique established under the laws of the
Republic of France (the "Manufacturer"), the Manufacturer has agreed, among
other things, to unconditionally guarantee the due and punctual performance by
the Supplier of all of its liabilities and obligations as set forth in the
Purchase Agreement;

            WHEREAS, Assignor and Assignee are entering into a Lease Agreement
[NW ____ _], dated as of the date hereof (as the same may hereafter from time to
time be supplemented, amended or modified, the "Lease"), pursuant to which the
Aircraft will be leased by Assignee to Assignor; and

            WHEREAS, Assignor, on the terms and conditions herein and in the
Consent and Agreement executed by the Manufacturer and the Supplier attached
hereto, desires to assign to Assignee certain of Assignor's rights and interests
in and under the Purchase Agreement and the Guaranty relating to the Aircraft,
and Assignee desires to accept such assignment, as hereinafter set forth;

            NOW, THEREFORE, in consideration of the mutual covenants herein
contained and for other good and valuable consideration, the parties hereto
agree as follows:

            1. Assignment; Rights Reserved. Subject to the provisions of
paragraph 3(a) hereof, Assignor does hereby sell, assign, transfer and set over
unto Assignee, all of Assignor's rights and interests in and to (i) Clauses 12,
13 and, to the extent relating to acts to be performed following the date of
enforcement of this Purchase Agreement Assignment, 17 of the Purchase Agreement
(but not any other provision of the Purchase Agreement or any letter agreement
referred to therein) as such Clauses relate to the Aircraft (the "Assigned
Warranties"), and (ii) the Guaranty as it relates to the Assigned Warranties;
reserving to Assignor, however, all of Assignor's rights and interests in and to
Clauses 12, 13 and, to the
<PAGE>

extent relating to acts to be performed following the date of enforcement of
this Purchase Agreement Assignment, 17 of the Purchase Agreement and the
Guaranty as and to the extent that such Clauses of the Purchase Agreement and
the Guaranty relate to aircraft other than the Aircraft and to the extent that
the Purchase Agreement and the Guaranty relate to any other matters not directly
pertaining to the Aircraft.

            2. Acceptance of Assignment. Assignee hereby accepts the assignment
contained in paragraph 1 hereof.

            3. Rights of Assignor in Absence of Event of Default.

            (a) With respect to the assignment contained in paragraph 1 hereof,
and notwithstanding the foregoing, if and so long as (A) the Aircraft shall be
subject to the Lease and (B) no Event of Default under the Lease has occurred
and is continuing, (1) Assignee authorizes Assignor, on behalf of but to the
exclusion of Assignee, to exercise in Assignor's own name (i) all rights and
powers related to the Assigned Warranties and the Guaranty as it relates to the
Assigned Warranties and (ii) subject to paragraph 3(c) hereof, to retain any
recovery or benefit resulting from the enforcement of any Assigned Warranties in
respect of the Aircraft or resulting from the enforcement of the Guaranty in
respect of the same, and (2) Assignee shall, at Assignor's expense, cooperate
with Assignor and take such actions as Assignor reasonably deems necessary to
enable Assignor to enforce such rights and claims.

            (b) In the event that an Event of Default under the Lease has
occurred and is continuing and thereafter until such Event of Default has been
cured or waived: (i) at Assignee's option, the authorization given to Assignor
under paragraph 3(a) hereof to enforce such rights and claims shall henceforth
cease to be effective and Assignee and its successors and permitted assigns
shall, to the exclusion of Assignor, be entitled to assert and enforce such
rights and claims as substitute party plaintiff or otherwise, and Assignor
shall, at the request of Assignee or its successors or permitted assigns and at
Assignor's expense, cooperate with and take such action as reasonably necessary
to enable Assignee and its successors and permitted assigns to enforce such
rights and claims, and Assignee, if it shall elect to enforce such rights or
claims, shall use its best efforts to assert and enforce such rights and claims,
and (ii) Assignor will be deemed to have irrevocably constituted Assignee and
its successors and permitted assigns Assignor's true and lawful attorney (it
being acknowledged that such appointment is coupled with an interest, namely
Assignee's rights acquired and to be acquired hereunder) with full power (in the
name of Assignor or otherwise) to ask, require, demand, receive, settle,
compromise, compound and give acquittance for any and all monies and claims for
monies due and to become due under, or arising out of, the Purchase Agreement or
the Guaranty in respect of the Aircraft, to the extent that the same have been
assigned by this Assignment, and for such period as Assignee may exercise rights
with respect thereto under this clause (ii), to endorse any checks or other
instruments or orders in connection therewith and to file any claims or take any
action or institute (or, if previously commenced, assume control of) any
proceedings and to obtain any recovery in connection therewith which Assignee
may deem to be necessary or advisable in the premises.

            (c) Notwithstanding this Assignment and anything herein to the
contrary (but subject to all the terms of the Purchase Agreement), all amounts
that the Supplier or the


                                      -2-
<PAGE>

Manufacturer is obligated to pay to Assignor under Clauses 12, 13 and, to the
extent relating to acts to be performed following the date of enforcement of
this Purchase Agreement Assignment, 17 of the Purchase Agreement with respect to
the Aircraft or the Guaranty as it relates to such Clauses (a "Supplier
Payment"), will be payable and applicable as follows: so long as the Aircraft is
subject to the Lease, all Supplier Payments shall be paid to Assignor unless and
until an Event of Default under the Lease has occurred and is continuing,
whereupon the Assignee shall direct the Supplier to make all Supplier Payments
directly to the Indenture Trustee or (if written notice has been given to the
Supplier and the Manufacturer that the Trust Indenture is no longer in effect in
accordance with its terms and all amounts due and payable under the Secured
Certificates have been paid in full) Assignee. Any amounts received by Assignee
pursuant to the immediately preceding sentence shall, to the extent not
theretofore applied in satisfaction of sums owing to Assignee in accordance with
the terms of the Lease, be returned to Assignor promptly after all Events of
Default under the Lease have been cured or waived.

            4. Certain Rights and Obligations of the Parties.

            (a) Anything herein contained to the contrary notwithstanding: (i)
Assignor shall at all times remain liable to the Supplier under the Purchase
Agreement in respect of the Aircraft to perform all of the duties and
obligations of "Northwest" thereunder to the same extent as if this Assignment
had not been executed; (ii) the exercise by Assignee of any of the rights
assigned hereunder shall not release Assignor from any of its duties or
obligations to the Supplier under the Purchase Agreement in respect of the
Aircraft except to the extent that such exercise by Assignee shall constitute
performance of such duties and obligations; and (iii) except as provided in
paragraph 4(b) hereof, neither Assignee nor any of its successors or assigns
shall have any obligation or liability under the Purchase Agreement by reason
of, or arising out of, this Assignment or be obligated to perform any of the
obligations or duties of Assignor under the Purchase Agreement or to make any
payment or make any inquiry as to the sufficiency of any payment received by it
or to present or to file any claim or to take any other action to collect or
enforce any claim for any payment assigned hereunder.

            (b) Without in any way releasing Assignor from any of its duties or
obligations under the Purchase Agreement, Assignee confirms for the benefit of
the Supplier and the Manufacturer that, insofar as the provisions of the
Purchase Agreement relate to the Aircraft, in exercising any rights under the
Purchase Agreement or the Guaranty, or in making any claim with respect to the
Aircraft or other goods and services delivered or to be delivered pursuant to
the Purchase Agreement or the Guaranty, the terms and conditions of the Purchase
Agreement and the Guaranty shall apply to, and be binding upon, Assignee to the
same extent as Assignor. Assignee hereby confirms that it shall be deemed for
all purposes to have read and be familiar with the Purchase Agreement and the
Guaranty and the forms of Manufacturer and Supplier consents to this Agreement
and to understand thoroughly the terms and conditions thereof.

            (c) Nothing contained herein shall (i) subject the Supplier or the
Manufacturer to any liability to which it would not otherwise be subject under
the Purchase Agreement or the Guaranty or (ii) modify in any respect the
Supplier's or the Manufacturer's contract rights thereunder, except as provided
in the Consent and Agreement attached hereto.


                                      -3-
<PAGE>

            (d) The parties hereto agree that all of the statements,
representations, covenants and agreements made by Assignee as Owner Trustee
(when made in such capacity) contained in this Assignment and any agreement
referred to herein or in the Participation Agreement other than the Trust
Agreement, unless expressly otherwise stated, are made and intended only for the
purpose of binding the Trust Estate and establishing the existence of rights and
remedies which can be exercised and enforced against the Trust Estate.
Therefore, anything contained in this Assignment or such other agreements to the
contrary notwithstanding (except for any express provisions that Assignee is
responsible for in its individual capacity), no recourse shall be had with
respect to this Assignment or such other agreements against Assignee in its
individual capacity or against any institution or person which becomes a
successor trustee or co-trustee or any officer, director, trustee, servant or
direct or indirect parent or controlling person or persons of any of them;
provided, however, that this Section 4(d) shall not be construed to prohibit any
action or proceeding against First Security Bank, National Association, for its
own willful misconduct or grossly negligent conduct for which it would otherwise
be liable; and provided, further, that nothing contained in this Section 4(d)
shall be construed to limit the exercise and enforcement in accordance with the
terms of this Assignment or such other agreements of rights and remedies against
the Trust Estate. The foregoing provisions of this Section 4(d) shall survive
the termination of this Assignment and the other Operative Documents.

            5. Further Assurances. Assignor agrees that at any time and from
time to time Assignor will promptly and duly execute and deliver any and all
such further instruments and documents and take such further action as Assignee
may reasonably request in writing in order to obtain the full benefits of this
Assignment and of the rights and powers herein granted, provided, however, that
the execution and delivery of any such instrument or document shall not in any
way limit or restrict the rights or enlarge the obligations of Assignor in
respect of any of the Operative Documents.

            6. Assignor's Representations, Warranties and Covenants. Assignor
does hereby represent and warrant that Assignor has not assigned or pledged, and
hereby covenants that it will not assign or pledge, so long as this Assignment
shall remain in effect, the whole or any part of the rights hereby assigned to
anyone other than Assignee.

            7. No Amendment of Purchase Agreement. Assignee agrees that it will
not enter into any amendment, modification, supplement, rescission, cancellation
or termination of the Purchase Agreement or the Guaranty in respect of the
Aircraft without the prior written consent of Assignor.

            8. Execution of Assignment. This Assignment is being executed and
delivered by Assignor and Assignee concurrently with the execution and delivery
of the Lease.

            9. Binding Effect. This Assignment shall be binding upon and shall
inure to the benefit of Assignor, Assignee and their respective successors and
permitted assigns.

            10. GOVERNING LAW. THIS ASSIGNMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, INCLUDING ALL
MATTERS OF CONSTRUCTION, VALIDITY AND


                                      -4-
<PAGE>

PERFORMANCE. THIS ASSIGNMENT IS BEING DELIVERED IN THE STATE OF NEW YORK.

            11. Definitions. All terms not defined herein, which are used herein
in capitalized form and which are defined in the Lease, shall when used herein
have the meanings specified or referred to in the Lease.

            12. Notice. Except as otherwise expressly provided herein (notices
to the Supplier shall be sent to the address for the Supplier set forth in
Section 14), notice hereunder may be given, and shall be deemed to have been
received when given, as provided in Section 17 of the Lease.

            13. Limitation on Transfer. Except as provided in the next sentence,
Assignee agrees that it may not sell, assign or otherwise transfer any of the
Assigned Warranties or the Guaranty as it relates to the Assigned Warranties
without the prior written consent of the Supplier and the Manufacturer, except
in connection with the exercise of remedies under the Trust Indenture. Assignor
consents to the assignment by Assignee to the Indenture Trustee, as security for
the Secured Certificates to be issued under the Trust Indenture and the other
obligations secured thereby as specified in the Trust Indenture, of all of
Assignee's rights and interests in and to the Purchase Agreement and the
Guaranty under this Assignment.

            14. Requirement of Notice to the Supplier. For all purposes of this
Assignment, the Supplier and the Manufacturer shall not be deemed to have
knowledge of and need not recognize any Event of Default, unless and until the
Supplier shall have received written notice thereof from Assignee or the
Indenture Trustee addressed to its Chief Executive Officer, 2 Rond Point Maurice
Bellonte, 31700 Blagnac, France (telex 521155F) (fax: ________) and, in acting
in accordance with the terms of the Purchase Agreement, the Guaranty and this
Assignment, the Supplier and the Manufacturer may act with aquittance and
conclusively rely upon such notice.

            15. Counterparts. This Assignment may be executed by the parties
hereto in separate counterparts, each of which when so executed and delivered
shall be an original, but all of such counterparts shall together constitute but
one and the same instrument.


                                      -5-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Purchase
Agreement Assignment to be duly executed as of the day and year first above
written.

                                        NORTHWEST AIRLINES, INC.,
                                          as Assignor

                                        By:_____________________________________
                                           Name:
                                           Title:


                                        FIRST SECURITY BANK,
                                        NATIONAL ASSOCIATION,
                                          Not in its individual capacity
                                          but solely as Owner Trustee,
                                          as Assignee

                                        By:_____________________________________
                                           Name:
                                           Title:

            The undersigned, not in its individual capacity but solely as
Indenture Trustee for the benefit of the holders of Secured Certificates and as
assignee of, and holder of a security interest in and to the foregoing Purchase
Agreement Assignment and the Purchase Agreement and the Guaranty pursuant to
such Purchase Agreement Assignment, agrees to the terms of the foregoing
Purchase Agreement Assignment and agrees that its rights and remedies under such
Purchase Agreement Assignment shall be subject to the terms and conditions
thereof, including paragraph 4(b), and of the Purchase Agreement and the
Guaranty.

                                        STATE STREET BANK AND
                                        TRUST COMPANY,
                                          Not in its individual capacity
                                          but solely as Indenture Trustee

                                        By:_____________________________________
                                           Name:
                                           Title:


                                      -6-



================================================================================

                                 TRUST AGREEMENT
                                   [NW ____ _]

                           Dated as of [____________]

                                     between

                   [_______________________________________],
                                           Owner Participant

                                                        and

                   FIRST SECURITY BANK, NATIONAL ASSOCIATION,

                                          Owner Trustee

                        One Airbus [A320-212] [A319-113]
                                    Aircraft

================================================================================
<PAGE>

                                 TRUST AGREEMENT
                                   [NW ____ _]

            This TRUST AGREEMENT [NW ____ _] dated as of [_______________]
between [____________________________________], a [_______________] (the
"Original Owner Participant"), and FIRST SECURITY BANK, NATIONAL ASSOCIATION, a
national banking association (in its individual capacity, "FSB") and otherwise
not in its individual capacity but solely as trustee hereunder (herein in such
capacity with its permitted successors and assigns called the "Owner Trustee");

                              W I T N E S S E T H:

                                   ARTICLE I

                              DEFINITIONS AND TERMS

            SECTION 1.01. Certain Definitions. Unless the context shall
otherwise require and except as contained in this Section 1.01, the capitalized
terms used herein shall have the respective meanings assigned thereto in the
Lease (as hereinafter defined) for all purposes hereof. All definitions
contained in this Section 1.01 shall be equally applicable to both the singular
and plural forms of the terms defined. For all purposes of this Trust Agreement
the following terms shall have the following meanings:

            "Excluded Payments" has the meaning ascribed to such term in the
Trust Indenture.

            "Indenture Event of Default" has the meaning which the term "Event
of Default" has in the Trust Indenture.

            "Lease" means that certain Lease Agreement [NW ____ _], to be dated
as of the date hereof, and to be entered into by the Owner Trustee and Lessee
concurrently with the execution and delivery of this Trust Agreement, as said
Lease Agreement may from time to time be supplemented or amended, or the terms
thereof waived or modified, to the extent permitted by, and in accordance with,
the terms of this Trust Agreement. The term "Lease" shall also include each
Lease Supplement from time to time entered into pursuant to the terms of the
Lease.

            "Lease Event of Default" has the meaning which the term "Event of
Default" has in the Lease.

            "Lessee" means Northwest Airlines, Inc., a Minnesota corporation,
and its permitted successors and assigns.

            "Owner Participant" means the Original Owner Participant and each
Subsequent Owner Participant to the extent that the same shall, at the relevant
time, have an Ownership Interest.
<PAGE>

            "Ownership Interest" means, in the case of each Owner Participant,
the percentage of its undivided beneficial interest in the Trust Estate created
by this Trust Agreement, which percentage shall be 100%.

            "Participation Agreement" has the meaning ascribed to such term in
the Lease.

            "Replacement Airframe" has the meaning ascribed to such term in the
Trust Indenture.

            "Replacement Engine" has the meaning ascribed to such term in the
Trust Indenture.

            "Subsequent Owner Participant" means any corporation to which the
Original Owner Participant or any transferee from the Original Owner Participant
or any Subsequent Owner Participant shall have transferred at any time after the
Delivery Date all of the undivided right, title and interest originally held by
the Original Owner Participant in this Trust Agreement, the Trust Estate and the
Participation Agreement, to the extent permitted by Section 8.01 of this Trust
Agreement and Section 8 of the Participation Agreement, provided that any such
transfer: (i) shall be effected by a written agreement, in form and substance
reasonably satisfactory to the Owner Trustee in its individual capacity, among
such transferee, its transferor and the Owner Trustee, which shall provide that
such transferee thereby becomes a party to, and beneficiary of, this Trust
Agreement and an Owner Participant for all purposes hereof and that such
transferee assumes all of the obligations of its transferor under this Trust
Agreement; and (ii) so long as the Lease shall be in effect or any Secured
Certificates remain unpaid, such transferee and its transferor shall have
complied with all of the terms of Section 8(n) of the Participation Agreement.

            "Trust Estate" means all estate, right, title and interest of the
Owner Trustee in and to the Aircraft, the Lease, any Lease Supplement, the
Purchase Agreement, the Guaranty, the Purchase Agreement Assignment, the Bill of
Sale and the FAA Bill of Sale, including, without limitation, all amounts of
Basic Rent and Supplemental Rent including without limitation insurance proceeds
(other than insurance proceeds payable to or for the benefit of the Owner
Trustee, for its own account or in its individual capacity, the Owner
Participant, the Loan Participants or the Indenture Trustee) and requisition,
indemnity or other payments of any kind for or with respect to the Aircraft
(except amounts owing to the Owner Participant, to the Indenture Trustee, to the
Owner Trustee, in its individual capacity, or to the Loan Participants or any
other holder of a Secured Certificate, or to any of their respective directors,
officers, employees, servants and agents, pursuant to Section 7 of the
Participation Agreement). Notwithstanding the foregoing, "Trust Estate" shall
not include any Excluded Payments.

            "Trust Indenture Estate" has the meaning ascribed to such term in
the Trust Indenture.

            "Trust Office" shall mean the principal corporate trust office of
the Owner Trustee at 79 South Main Street, Salt Lake City, Utah 84111,
Attention: Corporate Trust Department, or the principal corporate trust office
of any successor Owner Trustee.


                                      -2-
<PAGE>

            "Trust Supplement" means a supplement to the Trust Indenture and to
this Trust Agreement in substantially the form of Exhibit A to the Trust
Indenture which shall particularly describe the Aircraft, and any Replacement
Airframe and Replacement Engine included in the property of the Owner Trustee
covered by this Trust Agreement.

                                   ARTICLE II

                AUTHORITY TO EXECUTE CERTAIN OPERATIVE DOCUMENTS;
                              DECLARATION OF TRUST

            SECTION 2.01. Authority to Execute Documents. The Owner Participant
hereby authorizes and directs the Owner Trustee to execute and deliver the
Operative Documents and any other agreements, instruments or documents to which
the Owner Trustee is a party in the respective forms thereof in which delivered
from time to time by the Owner Participant to the Owner Trustee for execution
and delivery and, subject to the terms hereof, to perform its duties and, upon
instructions from the Owner Participant, exercise its rights under said
Operative Documents in accordance with the terms thereof.

            SECTION 2.02. Declaration of Trust. The Owner Trustee hereby
declares that it will hold the Trust Estate upon the trusts hereinafter set
forth for the use and benefit of the Owner Participant, subject, however, to the
provisions of and the Lien created by the Trust Indenture and to the provisions
of the Lease.

                                  ARTICLE III

                      ACCEPTANCE AND DELIVERY OF AIRCRAFT;
                        ISSUANCE OF SECURED CERTIFICATES

            SECTION 3.01. Acceptance of Aircraft. The Original Owner Participant
hereby authorizes and directs the Owner Trustee to, and the Owner Trustee agrees
for the benefit of the Owner Participant that it will, on the Delivery Date,
subject to due compliance with the terms of Section 3.02 hereof:

            (a) purchase the Aircraft pursuant to the Participation Agreement
      and the Bill of Sale;

            (b) accept from Lessee the delivery of the Bill of Sale and the FAA
      Bill of Sale;

            (c) cause the Aircraft to be leased to Lessee under the Lease, and
      in furtherance thereof execute and deliver a Lease Supplement covering the
      Aircraft;

            (d) execute and deliver the Trust Supplement covering the Aircraft;

            (e) issue to the Loan Participants Secured Certificates in the
      amounts and otherwise as provided in Section 1(a) of the Participation
      Agreement;


                                      -3-
<PAGE>

            (f) execute and deliver the financing statements referred to in
      Section 4(a)(vi) of the Participation Agreement, together with all other
      agreements, documents and instruments referred to in Section 4 of the
      Participation Agreement to which the Owner Trustee is a party; and

            (g) effect the registration of the Aircraft in the name of the Owner
      Trustee by filing or causing to be filed with the FAA: (i) the FAA Bill of
      Sale; (ii) an application for registration of the Aircraft in the name of
      the Owner Trustee (including without limitation an affidavit from the
      Owner Trustee in compliance with the provisions of 14 C.F.R. ss.
      47.7(c)(2)(ii) (1979)); and (iii) the Trust Agreement.

            SECTION 3.02. Conditions Precedent. The right and obligation of the
Owner Trustee to take the action required by Section 3.01 hereof with respect to
the Aircraft shall be subject to the following conditions precedent:

            (a) the Original Owner Participant shall have made the full amount
      of its Commitment set forth in Schedule II of the Participation Agreement
      available to the Owner Trustee, in immediately available funds, in
      accordance with Section 1 of the Participation Agreement; and

            (b) the terms and conditions of Section 4 of the Participation
      Agreement, insofar as they relate to the Aircraft, shall have been
      complied with in a manner satisfactory to the Original Owner Participant
      and the Owner Trustee.

            SECTION 3.03. Authorization in Respect of a Termination of the Lease
and Assumption of the Secured Certificates. The Owner Participant hereby
authorizes and directs the Owner Trustee to, and the Owner Trustee agrees for
the benefit of the Owner Participant that it will, take the actions specified to
be taken by the Owner Trustee in Section 8(x) of the Participation Agreement
upon Lessee's purchasing the Aircraft pursuant to Section 19(d) of the Lease and
upon Lessee's assuming the indebtedness evidenced by the Secured Certificates in
accordance with the provisions of such Section 8(x).

            SECTION 3.04. Authorization in Respect of a Replacement Airframe or
Replacement Engines. The Owner Participant hereby authorizes and directs the
Owner Trustee to, and the Owner Trustee agrees for the benefit of the Owner
Participant that it will, in the event of a Replacement Airframe and Replacement
Engines, if any, being substituted pursuant to Section 10(a) of the Lease, or a
Replacement Engine being substituted pursuant to Section 10(b) of the Lease,
subject to due compliance with the terms of Section 10(a) or 10(b) of the Lease,
as the case may be:

            (a) to the extent not previously accomplished by a prior
      authorization, authorize a representative or representatives of the Owner
      Trustee (who shall be an employee or employees of Lessee) to accept
      delivery of the Replacement Airframe and Replacement Engines, if any, or
      the Replacement Engines;

            (b) accept from Lessee or other vendor of the Replacement Airframe
      and Replacement Engines, if any, or the Replacement Engine a bill of sale
      or bills of sale (if tendered), and the invoice, if any, with respect to
      the Replacement Airframe and Replacement Engines, if any, or the


                                      -4-
<PAGE>

      Replacement Engine being furnished pursuant to Section 10(a) or (b) of the
      Lease;

            (c) in the case of a Replacement Airframe, make application to the
      Federal Aviation Administration for the registration in the name of the
      Owner Trustee of the Aircraft of which such Replacement Airframe is a
      part;

            (d) execute and deliver a Lease Supplement and a Trust Supplement
      covering (i) the Aircraft of which such Replacement Airframe is part or
      (ii) such Replacement Engine, as the case may be;

            (e) transfer its interest in (without recourse except as to
      obligations in respect of Lessor Liens, including for this purpose Liens
      that would be Lessor Liens but for the proviso in the definition of Lessor
      Liens) and to the Airframe and Engines (if any) or the Engine being
      replaced to Lessee;

            (f) request in writing that the Indenture Trustee execute and
      deliver to Lessee appropriate instruments to release the Airframe and
      Engines or engines (if any) or the Engine or engine being replaced from
      the lien created under the Trust Indenture and release the Purchase
      Agreement and the Purchase Agreement Assignment (solely with respect to
      such replaced Airframe and Engines, if any, or Engine) from the assignment
      and pledge under the Trust Indenture; and

            (g) upon instructions from the Owner Participant, take such further
      action as may be contemplated by clauses (A) and (B) of the third
      paragraph of Section 10(a) of the Lease or clauses (ii) and (iii) of
      Section 10(b) of the Lease, as the case may be.

            SECTION 3.05. Trust Agreement Remaining in Full Force and Effect. In
the event of the substitution of a Replacement Airframe for the Airframe or the
substitution of a Replacement Engine for any Engine or engine, all provisions of
this Trust Agreement relating to such replaced Airframe or Engine or engine
shall be applicable to such Replacement Airframe or Replacement Engine with the
same force and effect as if such Replacement Airframe or Replacement Engine were
the same airframe or engine as the Airframe or Engine being replaced but for the
Event of Loss with respect to such Airframe or Engine.

            SECTION 3.06. Authorization in Respect of a Return of an Engine. The
Owner Participant hereby authorizes and directs the Owner Trustee to, and the
Owner Trustee agrees for the benefit of the Owner Participant that it will, in
the event of an engine being transferred to the Owner Trustee pursuant to
Section 5(b) of the Lease, subject to due compliance with the terms of such
Section 5(b):

            (a) accept from Lessee the bill of sale with respect to such engine
      contemplated by such Section 5(b) (if tendered);

            (b) transfer its interest in (without recourse except as to
      obligations in respect of Lessor Liens, including for this purpose Liens
      that would be Lessor Liens but for the proviso in the definition of Lessor
      Liens) and to an Engine to Lessee as contemplated by such Section 5(b);
      and


                                      -5-
<PAGE>

            (c) request in writing that the Indenture Trustee execute and
      deliver to Lessee appropriate instruments to release the Engine being
      transferred to Lessee pursuant to such Section 5(b) from the lien of the
      Trust Indenture and to release the Purchase Agreement and the Purchase
      Agreement Assignment (solely with respect to such Engine) from the
      assignment and pledge under the Trust Indenture.

                                   ARTICLE IV

                      RECEIPT, DISTRIBUTION AND APPLICATION
                         OF INCOME FROM THE TRUST ESTATE

            SECTION 4.01. Distribution of Payments. (a) Payments to Indenture
Trustee. Until the Trust Indenture shall have been discharged pursuant to
Section 10.01 thereof, all Basic Rent, Supplemental Rent, insurance proceeds and
requisition or other payments of any kind included in the Trust Estate (other
than Excluded Payments) payable to the Owner Trustee shall be payable directly
to the Indenture Trustee (and if any of the same are received by the Owner
Trustee shall upon receipt be paid over to the Indenture Trustee without
deduction, set-off or adjustment of any kind) for distribution in accordance
with the provisions of Article III of the Trust Indenture.

            (b) Payments to Owner Trustee; Other Parties. After the Trust
Indenture shall have been discharged pursuant to Section 10.01 thereof, any
payment of the type referred to in Section 4.01(a) hereof (other than Excluded
Payments) received by the Owner Trustee, any payments received from the
Indenture Trustee other than as specified in Section 4.01(d) hereof and any
other amount received as part of the Trust Estate and for the application or
distribution of which no provision is made herein, shall be distributed
forthwith upon receipt by the Owner Trustee in the following order of priority:
first, so much of such payment as shall be required to reimburse the Owner
Trustee for any expenses not otherwise reimbursed as to which the Owner Trustee
is entitled to be so reimbursed pursuant to the provisions hereof shall be
retained by the Owner Trustee; second, so much of the remainder for which
provision as to the application thereof is contained in the Lease or any of the
other Operative Documents shall be applied and distributed in accordance with
the terms of the Lease or such other Operative Document; and third, the balance,
if any, shall be paid to the Owner Participant.

            (c) Certain Distributions to Owner Participant. All amounts from
time to time distributable by the Indenture Trustee to the Owner Participant
pursuant to the Trust Indenture shall, if paid to the Owner Trustee, be
distributed by the Owner Trustee to the Owner Participant in accordance with the
provisions of Article III of the Trust Indenture.

            (d) Excluded Payments. Any Excluded Payments received by the Owner
Trustee shall be paid by the Owner Trustee to the Person to whom such Excluded
Payments are payable under the provisions of the Participation Agreement, the
Tax Indemnity Agreement or the Lease.

            SECTION 4.02. Method of Payments. The Owner Trustee shall make
distributions or cause distributions to be made to the Owner Participant
pursuant to this Article IV by transferring by wire transfer the amount to be
distributed to such account or accounts of


                                      -6-
<PAGE>

the Owner Participant as the Owner Participant may designate from time to time
in writing to the Owner Trustee. Notwithstanding the foregoing, the Owner
Trustee will, if so requested by the Owner Participant in writing, pay any or
all amounts payable to the Owner Participant pursuant to this Article IV either
(i) by crediting such amount or amounts to an account or accounts maintained by
the Owner Participant with the Owner Trustee in its individual capacity in
immediately available funds, (ii) by payment at the Trust Office of the Owner
Trustee, in immediately available funds, or (iii) by mailing an official bank
check or checks in such amount or amounts payable to the Owner Participant at
such address as the Owner Participant shall have designated in writing to the
Owner Trustee.

                                   ARTICLE V

                           DUTIES OF THE OWNER TRUSTEE

            SECTION 5.01. Notice of Event of Default. If the Owner Trustee shall
have knowledge of a Lease Event of Default or an Indenture Event of Default (or
an event which with the passage of time or the giving of notice or both would
constitute a Lease Event of Default or an Indenture Event of Default) the Owner
Trustee shall give to the Owner Participant prompt telephonic or telecopy notice
thereof followed by prompt confirmation thereof by certified mail, postage
prepaid, provided that (i) in the case of an event which with the passage of
time would constitute an Indenture Event of Default referred to in paragraph (c)
of Section 4.02 of the Trust Indenture, such notice shall in no event be
furnished later than ten (10) days after the Owner Trustee shall first have
knowledge of such event and (ii) in the case of a misrepresentation by the Owner
Trustee which with the passage of time would constitute an Indenture Event of
Default referred to in paragraph (d) of Section 4.02 of the Trust Indenture,
such notice shall in no event be furnished later than ten (10) days after the
Owner Trustee shall first have knowledge of such event. Subject to the terms of
Section 5.03 hereof, the Owner Trustee shall take such action or shall refrain
from taking such action, not inconsistent with the provisions of the Trust
Indenture, with respect to such Lease Event of Default, Indenture Event of
Default or other event as the Owner Trustee shall be directed in writing by the
Owner Participant. If the Owner Trustee shall not have received instructions as
above provided within twenty (20) days after the mailing of such notice to the
Owner Participant, the Owner Trustee until instructed otherwise in accordance
with the preceding sentence may, but shall be under no duty to, take or refrain
from taking such action with respect to such Lease Event of Default, Indenture
Event of Default or other event, not inconsistent with the provisions of the
Trust Indenture, as it shall deem advisable in the best interests of the Owner
Participant. For all purposes of this Trust Agreement, the Lease and the other
Operative Documents, in the absence of actual knowledge by an officer of FSB in
the Corporate Trust Department, the Owner Trustee shall not be deemed to have
knowledge of a Lease Event of Default, an Indenture Event of Default or other
event referred to in this Section 5.01 unless notified in writing by the
Indenture Trustee, the Owner Participant or Lessee.

            SECTION 5.02. Action Upon Instructions. Subject to the terms of
Sections 5.01 and 5.03 hereof, upon the written instructions at any time and
from time to time of the Owner Participant, the Owner Trustee will take such of
the following actions, not inconsistent with the provisions of the Trust
Indenture, as may be specified in such instructions: (i) give such notice or
direction or exercise such right, remedy or power hereunder or under any of the


                                      -7-
<PAGE>

Operative Documents to which the Owner Trustee is a party or in respect of all
or any part of the Trust Estate as shall be specified in such instructions
(including entering into agreements referred to in clause (i) of the definition
of "Subsequent Owner Participant"); (ii) take such action to preserve or protect
the Trust Estate (including the discharge of Liens) as may be specified in such
instructions; (iii) approve as satisfactory to it all matters required by the
terms of the Lease or the other Operative Documents to be satisfactory to the
Owner Trustee, it being understood that without written instructions of the
Owner Participant, the Owner Trustee shall not approve any such matter as
satisfactory to it (it being understood that the provisions of Sections 3.03,
3.04 and 3.06 hereof do not constitute instructions by the Owner Participant for
the Owner Trustee to approve of or consent to the matters to be approved of or
consented to by the Owner Trustee in the sections of the Lease referred to in
Sections 3.03, 3.04 or 3.06 hereof); and (iv) subject to the rights of Lessee
under the Operative Documents, after the expiration or earlier termination of
the Lease, deliver the Aircraft to the Owner Participant in accordance with such
instructions, convey all of the Owner Trustee's right, title and interest in and
to the Aircraft for such amount, on such terms and to such purchaser or
purchasers as shall be designated in such instructions, or net lease the
Aircraft on such terms and to such lessee or lessees as shall be designated in
such instructions.

            SECTION 5.03. Indemnification. The Owner Trustee shall not be
required to take any action under Section 5.01 (other than the giving of the
notices referred to therein) or 5.02 hereof unless the Owner Trustee shall have
been indemnified by the Owner Participant, in manner and form satisfactory to
the Owner Trustee, against any liability, cost or expense (including reasonable
counsel fees and disbursements) which may be incurred in connection therewith;
and, if the Owner Participant shall have directed the Owner Trustee to take any
such action or refrain from taking any action, the Owner Participant agrees to
furnish such indemnity as shall be required and, in addition, to the extent not
otherwise paid pursuant to the provisions of the Lease or the Participation
Agreement, to pay the reasonable compensation of the Owner Trustee for the
services performed or to be performed by it pursuant to such direction and any
fees and disbursements of counsel or agents employed by the Owner Trustee in
connection therewith. The Owner Trustee shall not be required to take any action
under Section 5.01 or 5.02 hereof if the Owner Trustee shall reasonably
determine, or shall have been advised by counsel, that such action is contrary
to the terms of any of the Operative Documents to which the Owner Trustee is a
party, or is otherwise contrary to law.

            SECTION 5.04. No Duties Except as Specified in Trust Agreement or
Instructions. The Owner Trustee shall not have any duty or obligation to manage,
control, use, sell, dispose of or otherwise deal with the Aircraft or any other
part of the Trust Estate, or to otherwise take or refrain from taking any action
under, or in connection with any of the Operative Documents to which the Owner
Trustee is a party, except as expressly required by the terms of any of the
Operative Documents to which the Owner Trustee is a party, or (to the extent not
inconsistent with the provisions of the Trust Indenture) as expressly provided
by the terms hereof or in written instructions from the Owner Participant
received pursuant to the terms of Section 5.01 or 5.02, and no implied duties or
obligations shall be read into this Trust Agreement against the Owner Trustee.
FSB agrees that it will, in its individual capacity and at its own cost or
expense (but without any right of indemnity in respect of any such cost or
expense under Section 7.01 hereof) promptly take such action as may be necessary
to duly discharge and satisfy


                                      -8-
<PAGE>

in full all Lessor Liens which it is required to discharge pursuant to Section
8(h) of the Participation Agreement and otherwise comply with the terms of said
Section binding on it.

            SECTION 5.05. Satisfaction of Conditions Precedent. Anything herein
to the contrary notwithstanding, the Owner Trustee shall comply with the
provisions of Section 3.01 hereof upon the satisfaction, to the satisfaction of
special counsel for the Owner Trustee, of all the applicable conditions
precedent specified in Section 3.02 hereof and in Section 4 of the Participation
Agreement.

            SECTION 5.06. No Action Except Under Specified Documents or
Instructions. The Owner Trustee shall not have any power, right or authority to,
and the Owner Trustee agrees that it will not, manage, control, use, sell,
dispose of or otherwise deal with the Aircraft or any other part of the Trust
Estate except (i) as expressly required by the terms of any of the Operative
Documents to which the Owner Trustee is a party, (ii) as expressly provided by
the terms hereof, or (iii) as expressly provided in written instructions from
the Owner Participant pursuant to Section 5.01 or 5.02 hereof.

                                   ARTICLE VI

                                THE OWNER TRUSTEE

            SECTION 6.01. Acceptance of Trusts and Duties. FSB accepts the
trusts hereby created and agrees to perform the same but only upon the terms
hereof applicable to it. The Owner Trustee also agrees to receive and disburse
all monies received by it constituting part of the Trust Estate upon the terms
hereof. FSB shall not be answerable or accountable under any circumstances,
except (a) for its own willful misconduct or gross negligence, (b) for
performance of the terms of the last sentence of Section 5.04 hereof, (c) for
its or the Owner Trustee's failure to use ordinary care to disburse funds and
(d) for liabilities that may result from the inaccuracy of any representation or
warranty of it (or from the failure by it to perform any covenant) in Section
6.03 hereof, in Section 6.03 of the Trust Indenture, in Section 4 of the Lease
or in Section 8(c), 8(d) and 8(v) of the Participation Agreement.

            SECTION 6.02. Absence of Certain Duties. Except in accordance with
written instructions furnished pursuant to Section 5.02 hereof and except as
provided in, and without limiting the generality of, Section 5.04 hereof and the
last sentence of Section 9.01(b) hereof, neither the Owner Trustee nor FSB shall
have any duty (i) to see to any recording or filing of any Operative Document or
of any supplement to any thereof or to see to the maintenance of any such
recording or filing or any other filing of reports with the Federal Aviation
Administration or other governmental agencies, except that FSB, in its
individual capacity, shall comply with the reporting requirements set forth in
14 C.F.R. ss. 47.45 or any successor provision and the Owner Trustee shall, to
the extent that information for that purpose is supplied by Lessee pursuant to
any of the Operative Documents, complete and timely submit (and furnish the
Owner Participant with a copy of) any and all reports relating to the Aircraft
which may from time to time be required by the Federal Aviation Administration
or any government or governmental authority having jurisdiction, or (ii) to see
to any insurance on the Aircraft or to effect or maintain any such insurance,
whether or not Lessee shall be in default with respect thereto, other than to
forward to the Owner Participant copies of all reports and other written
information which the


                                      -9-
<PAGE>

Owner Trustee receives from Lessee pursuant to Section 11(c) of the Lease, or
(iii) to see to the payment or discharge of any tax, assessment or other
governmental charge or any lien or encumbrance of any kind owing with respect
to, assessed or levied against any part of the Trust Indenture Estate or the
Trust Estate, except as provided in Section 8 of the Participation Agreement, or
(iv) to inspect Lessee's books and records with respect to the Aircraft at any
time permitted pursuant to the Lease. Notwithstanding the foregoing, the Owner
Trustee will furnish to the Indenture Trustee and the Owner Participant,
promptly upon receipt thereof, duplicates or copies of all reports, notices,
requests, demands, certificates, financial statements and other instruments
furnished to the Owner Trustee under the Lease or any other Operative Document.

            SECTION 6.03. No Representations or Warranties as to Certain
Matters. NEITHER THE OWNER TRUSTEE NOR FSB MAKES OR SHALL BE DEEMED TO HAVE MADE
(a) ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AS TO THE TITLE, VALUE,
CONDITION, DESIGN, OPERATION, MERCHANTABILITY OR FITNESS FOR USE OF THE AIRCRAFT
OR ANY PART THEREOF, OR ANY OTHER REPRESENTATION OR WARRANTY WITH RESPECT TO THE
AIRCRAFT WHATSOEVER, except that FSB in its individual capacity warrants that on
the Delivery Date the Owner Trustee shall have received whatever title was
conveyed to it by Lessee and that the Aircraft shall during the Term be free of
Lessor Liens attributable to it, or (b) any representation or warranty as to the
validity, legality or enforceability of this Trust Agreement or any Operative
Document to which the Owner Trustee is a party, or any other document or
instrument, or as to the correctness of any statement contained in any thereof
except to the extent that any such statement is expressly made herein or therein
as a representation by FSB in its individual capacity or by the Owner Trustee
and except that FSB in its individual capacity hereby represents and warrants
that this Trust Agreement has been, and (assuming due authorization, execution
and delivery by the Original Owner Participant of this Trust Agreement) the
Operative Documents to which it or the Owner Trustee is a party have been (or at
the time of execution and delivery of any such instrument by it or the Owner
Trustee hereunder or pursuant to the terms of the Participation Agreement that
such an instrument will be) duly executed and delivered by one of its officers
who is or will be, as the case may be, duly authorized to execute and deliver
such instruments on behalf of itself or the Owner Trustee, as the case may be.

            SECTION 6.04. No Segregation of Monies Required; No Interest. Except
as provided in Section 22 of the Lease, monies received by the Owner Trustee
hereunder need not be segregated in any manner except to the extent required by
law, and may be deposited under such general conditions as may be prescribed by
law, and the Owner Trustee shall not be liable for any interest thereon.

            SECTION 6.05. Reliance Upon Certificates, Counsel and Agents. The
Owner Trustee shall incur no liability to anyone in acting in reliance upon any
signature, instrument, notice, resolution, request, consent, order, certificate,
report, opinion, bond or other document or paper reasonably believed by it to be
genuine and reasonably believed by it to be signed by the proper party or
parties. Unless other evidence in respect thereof is specifically prescribed
herein, any request, direction, order or demand of the Owner Participant or
Lessee mentioned herein or in any of the Operative Documents to which the Owner
Trustee is a party shall be sufficiently evidenced by written instruments signed
by a person purporting to be the chairman of the board, the president, any
executive vice president, any senior vice president or any vice president or a


                                      -10-
<PAGE>

managing director and in the name of the Owner Participant or Lessee, as the
case may be. The Owner Trustee may accept a copy of a resolution of the Board of
Directors or Executive Committee of Lessee, certified by the secretary or any
assistant secretary of Lessee as duly adopted and in full force and effect, as
conclusive evidence that such resolution has been duly adopted by said Board or
Committee and that the same is in full force and effect. As to any fact or
matter the manner of ascertainment of which is not specifically described
herein, the Owner Trustee may for all purposes hereof rely on a certificate
signed by a person purporting to be the chairman of the board, the president,
any executive vice president, any senior vice president or any vice president or
a managing director of Lessee, as to such fact or matter, and such certificate
shall constitute full protection to the Owner Trustee for any action taken or
omitted to be taken by it in good faith in reliance thereon. In the
administration of trusts hereunder, the Owner Trustee may execute any of the
trusts or powers hereof and perform its powers and duties hereunder directly or
through agents or attorneys and may, at the expense of the Trust Estate, consult
with counsel, accountants and other skilled persons to be selected and employed
by it. The Owner Trustee shall not be liable for anything done, suffered or
omitted in good faith by it in accordance with the advice or opinion of any such
counsel, accountants or other skilled persons and the Owner Trustee shall not be
liable for the negligence of any such agent, attorney, counsel, accountant or
other skilled person appointed by it with due care hereunder.

            SECTION 6.06. Not Acting in Individual Capacity. In acting
hereunder, the Owner Trustee acts solely as trustee and not in its individual
capacity except as otherwise expressly provided herein; and, subject to the
terms of the Participation Agreement and the Trust Indenture, all persons, other
than the Owner Participant, as provided herein, having any claim against the
Owner Trustee by reason of the transactions contemplated hereby shall look only
to the Trust Estate for payment or satisfaction thereof.

            SECTION 6.07. Fees; Compensation. Except as provided in Section 5.03
or 7.01 hereof and Section 16 of the Participation Agreement, the Owner Trustee
agrees that it shall have no right against the Owner Participant or (subject to
the provisions of the Trust Indenture) the Trust Estate for any fee as
compensation for its services hereunder; provided, however, that the Owner
Trustee shall have a lien upon the Trust Estate (subject, however, to the lien
of the Trust Indenture) for any such fee not paid by Lessee as contemplated by
the last paragraph of Section 7(c) of the Participation Agreement.

            SECTION 6.08. Tax Returns. The Owner Trustee shall be responsible
for the keeping of all appropriate books and records relating to the receipt and
disbursement of all monies under this Trust Agreement or any agreement
contemplated hereby. The Owner Participant shall be responsible for causing to
be prepared and filed all income tax returns required to be filed by the Owner
Participant. The Owner Trustee shall be responsible for causing to be prepared,
at the request and expense of the Owner Participant, all income tax returns
required to be filed with respect to the trust created hereby and shall execute
and file such returns. The Owner Participant or the Owner Trustee, as the case
may be, upon request, will furnish the Owner Trustee or the Owner Participant,
as the case may be, with all such information as may be reasonably required from
the Owner Participant or the Owner Trustee, as the case may be, in connection
with the preparation of such income tax returns.


                                      -11-
<PAGE>

                                  ARTICLE VII

              INDEMNIFICATION OF OWNER TRUSTEE BY OWNER PARTICIPANT

            SECTION 7.01. Owner Participant to Indemnify Owner Trustee. The
Owner Participant hereby agrees, whether or not any of the transactions
contemplated hereby shall be consummated, to assume liability for, and hereby
indemnify, protect, save and keep harmless FSB in its individual capacity and
its successors, assigns, legal representatives, agents and servants, from and
against any and all liabilities, obligations, losses, damages, penalties, taxes
(excluding any taxes payable by FSB in its individual capacity on or measured by
any compensation received by FSB in its individual capacity for its services
hereunder or in connection with the transactions contemplated by the Operative
Documents), claims, actions, suits, costs, expenses or disbursements (including,
without limitation, reasonable ongoing fees of the Owner Trustee, reasonable
legal fees and expenses, and including without limitation any liability of an
owner, any strict liability and any liability without fault) of any kind and
nature whatsoever which may be imposed on, incurred by or asserted against FSB
in its individual capacity (whether or not also indemnified against by Lessee
under the Lease or under the Participation Agreement or also indemnified against
by any other person but only to the extent not otherwise paid or reimbursed by
Lessee or such other person) in any way relating to or arising out of this Trust
Agreement or any of the Operative Documents or the enforcement of any of the
terms of any thereof, or in any way relating to or arising out of the
manufacture, purchase, acceptance, nonacceptance, rejection, ownership,
delivery, lease, possession, use, operation, condition, sale, return or other
disposition of the Aircraft (including, without limitation, latent and other
defects, whether or not discoverable, and any claim for patent, trademark or
copyright infringement), or in any way relating to or arising out of the
administration of the Trust Estate or the action or inaction of the Owner
Trustee or FSB in its individual capacity hereunder, except (a) in the case of
willful misconduct or gross negligence on the part of the Owner Trustee or FSB
in its individual capacity in the performance or non-performance of its duties
hereunder or (b) those resulting from the inaccuracy of any representation or
warranty of FSB in its individual capacity (or from the failure of FSB in its
individual capacity to perform any covenant) in Section 6.03 hereof, in Section
6.03 of the Trust Indenture or, with respect to representations or warranties of
FSB in its individual capacity only, in Section 4 of the Lease, in Section 8(c),
Section 8(d) or Section 8(v) of the Participation Agreement or in any of the
other Operative Documents or (c) as may result from a breach by FSB in its
individual capacity of its covenants in the last sentence of Section 5.04 hereof
or (d) in the case of the failure to use ordinary care on the part of the Owner
Trustee or FSB in its individual capacity in the disbursement of funds. The
indemnities contained in this Section 7.01 extend to FSB only in its individual
capacity and shall not be construed as indemnities of the Trust Indenture Estate
or the Trust Estate (except to the extent, if any, that FSB in its individual
capacity has been reimbursed by the Trust Indenture Estate or the Trust Estate
for amounts covered by the indemnities contained in this Section 7.01). The
indemnities contained in this Section 7.01 shall survive the termination of this
Trust Agreement. In addition, if necessary, FSB in its individual capacity shall
be entitled to indemnification from the Trust Estate, subject to the Lien of the
Trust Indenture, for any liability, obligation, loss, damage, penalty, tax,
claim, action, suit, cost, expense or disbursement indemnified against pursuant
to this Section 7.01 to the extent not reimbursed by Lessee, the Owner
Participant or others, but without releasing any of them from their respective
agreements of reimbursement; and to secure the same FSB in its individual
capacity shall have a Lien on the


                                      -12-
<PAGE>

Trust Estate, subject to the Lien of the Trust Indenture, which shall be prior
to any interest therein of the Owner Participant. The payor of any indemnity
under this Article VII shall be subrogated to any right of the person
indemnified in respect of the matter as to which such indemnity was paid.

                                  ARTICLE VIII

                  TRANSFER OF THE OWNER PARTICIPANT'S INTEREST

            SECTION 8.01. Transfer of Interests. All provisions of Section 8(n)
of the Participation Agreement shall (with the same force and effect as if set
forth in full, mutatis mutandis, in this Section 8.01) be applicable to any
assignment, conveyance or other transfer by any Owner Participant of its right,
title or interest in and to the Participation Agreement, the Trust Estate or
this Trust Agreement.

                                   ARTICLE IX

                      SUCCESSOR OWNER TRUSTEES: CO-TRUSTEES

            SECTION 9.01. Resignation of Owner Trustee; Appointment of
Successor. (a) Resignation or Removal. The Owner Trustee or any successor Owner
Trustee (i) shall resign if required to do so pursuant to Section 8(c) of the
Participation Agreement and (ii) may resign at any time without cause by giving
at least sixty (60) days' prior written notice to the Owner Participant, the
Indenture Trustee (so long as the Lien of the Trust Indenture has not been fully
discharged) and Lessee (so long as the Lease is in effect), such resignation to
be effective upon the acceptance of appointment by the successor Owner Trustee
under Section 9.01(b) hereof. In addition, the Owner Participant may at any time
remove the Owner Trustee without cause by a notice in writing delivered to the
Owner Trustee, the Indenture Trustee (so long as the Lien of the Trust Indenture
has not been fully discharged) and Lessee (so long as the Lease is in effect),
such removal to be effective upon the acceptance of appointment by the successor
Owner Trustee under Section 9.01(b) hereof. In the case of the resignation or
removal of the Owner Trustee, the Owner Participant may appoint a successor
Owner Trustee by an instrument signed by the Owner Participant. If a successor
Owner Trustee shall not have been appointed within thirty (30) days after such
notice of resignation or removal, the Owner Trustee, the Owner Participant,
Lessee or the Indenture Trustee may apply to any court of competent jurisdiction
to appoint a successor Owner Trustee to act until such time, if any, as a
successor shall have been appointed as above provided. Any successor Owner
Trustee so appointed by such court shall immediately and without further act be
superseded by any successor Owner Trustee appointed as above provided.

            (b) Execution and Delivery of Documents, etc. Any successor Owner
Trustee, however appointed, shall execute and deliver to the predecessor Owner
Trustee and the Owner Participant an instrument accepting such appointment, and
thereupon such successor Owner Trustee, without further act, shall become vested
with all the estates, properties, rights, powers, duties and trusts of the
predecessor Owner Trustee in the trusts hereunder with like effect as if
originally named the Owner Trustee herein; but nevertheless, upon the written
request of such


                                      -13-
<PAGE>

successor Owner Trustee, such predecessor Owner Trustee shall execute and
deliver an instrument transferring to such successor Owner Trustee, upon the
trusts herein expressed, all the estates, properties, rights, powers and trusts
of such predecessor Owner Trustee, and such predecessor Owner Trustee shall duly
assign, transfer, deliver and pay over to such successor Owner Trustee all
monies or other property then held by such predecessor Owner Trustee upon the
trusts herein expressed. Upon the appointment of any successor Owner Trustee
hereunder, the predecessor Owner Trustee will execute such documents as are
provided to it by such successor Owner Trustee and will take such further
actions as are requested of it by such successor Owner Trustee as are reasonably
required to cause registration of the Aircraft included in the Trust Estate to
be transferred upon the records of the Federal Aviation Administration, or other
governmental authority having jurisdiction, into the name of the successor Owner
Trustee.

            (c) Qualification. Any successor Owner Trustee, however appointed,
shall be a Citizen of the United States without making use of a voting trust,
voting powers agreement or similar arrangement and shall also be a bank or trust
company organized under the laws of the United States or any state thereof
having a combined capital and surplus of at least $100,000,000, if there be such
an institution willing, able and legally qualified to perform the duties of the
Owner Trustee hereunder upon reasonable or customary terms.

            (d) Merger, etc. Any corporation into which the Owner Trustee may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which the Owner
Trustee shall be a party, or any corporation to which substantially all the
corporate trust business of the Owner Trustee may be transferred, shall, subject
to the terms of Section 9.01(c) hereof, be the Owner Trustee hereunder without
further act.

            SECTION 9.02. Co-Trustees and Separate Trustees. If at any time it
shall be necessary or prudent in order to conform to any law of any jurisdiction
in which all or any part of the Trust Estate is located, or the Owner Trustee
being advised by counsel shall determine that it is so necessary or prudent in
the interest of the Owner Participant or the Owner Trustee, or the Owner Trustee
shall have been directed to do so by the Owner Participant, the Owner Trustee
and the Owner Participant shall execute and deliver an agreement supplemental
hereto and all other instruments and agreements necessary or proper to
constitute another bank or trust company or one or more persons (any and all of
which shall be a Citizen of the United States without making use of a voting
trust, voting powers agreement or similar arrangement) approved by the Owner
Trustee and the Owner Participant, either to act as co-trustee, jointly with the
Owner Trustee, or to act as separate trustee hereunder (any such co-trustee or
separate trustee being herein sometimes referred to as an "additional trustee").
In the event an Indenture Event of Default not arising from a Lease Event of
Default shall occur and be continuing, the Owner Trustee may act under the
foregoing provisions of this Section 9.02 without the concurrence of the Owner
Participant; and the Owner Participant hereby appoints the Owner Trustee its
agent and attorney-in-fact to act for it under the foregoing provisions of this
Section 9.02 in such contingency.

            Every additional trustee hereunder shall, to the extent permitted by
law, be appointed and act, and the Owner Trustee and its successors shall act,
subject to the following provisions and conditions:


                                      -14-
<PAGE>

            (A) all powers, duties, obligations and rights conferred upon the
      Owner Trustee in respect of the custody, control and management of monies,
      the Aircraft or documents authorized to be delivered hereunder or under
      the Participation Agreement shall be exercised solely by the Owner
      Trustee;

            (B) all other rights, powers, duties and obligations conferred or
      imposed upon the Owner Trustee shall be conferred or imposed upon and
      exercised or performed by the Owner Trustee and such additional trustee
      jointly, except to the extent that under any law of any jurisdiction in
      which any particular act or acts are to be performed (including the
      holding of title to the Trust Estate) the Owner Trustee shall be
      incompetent or unqualified to perform such act or acts, in which event
      such rights, powers, duties and obligations shall be exercised and
      performed by such additional trustee;

            (C) no power given to, or which it is provided hereby may be
      exercised by, any such additional trustee shall be exercised hereunder by
      such additional trustee, except jointly with, or with the consent in
      writing of, the Owner Trustee;

            (D) no trustee hereunder shall be personally liable by reason of any
      act or omission of any other trustee hereunder;

            (E) the Owner Participant, at any time, by an instrument in writing
      may remove any such additional trustee unless such additional trustee was
      appointed by the Owner Trustee without the concurrence of the Owner
      Participant during the occurrence of an Indenture Event of Default not
      arising from a Lease Event of Default, in which case the Owner Trustee
      shall have the power to remove any such additional trustee without the
      concurrence of the Owner Participant; and the Owner Participant hereby
      appoints the Owner Trustee its agent and attorney-in-fact for it in such
      connection in such contingency; and

            (F) no appointment of, or action by, any additional trustee will
      relieve the Owner Trustee of any of its obligations under, or otherwise
      affect any of the terms of, the Trust Indenture or affect the interests of
      the Indenture Trustee or the holders of the Secured Certificates in the
      Trust Indenture Estate.

                                   ARTICLE X

                           SUPPLEMENTS AND AMENDMENTS
                     TO TRUST AGREEMENT AND OTHER DOCUMENTS

            SECTION 10.01. Supplements and Amendments. (a) Supplements and
Amendments. This Trust Agreement may not be amended, supplemented or otherwise
modified except by an instrument in writing signed by the Owner Trustee and the
Owner Participant. Subject to Section 10.02 hereof and the first sentence of
Section 10 of the Participation Agreement, the Owner Trustee will execute any
amendment, supplement or other modification of this Trust Agreement or of any
other Operative Document to which the Owner Trustee is a party which it is
requested to execute by the Owner Participant, except that the Owner Trustee
shall not execute any such amendment, supplement or other modification which, by
the express


                                      -15-
<PAGE>

provisions of any of the above documents, requires the consent of any other
party unless such consent shall have been obtained.

            (b) Delivery of Amendments and Supplements to Certain Parties. A
signed copy of each amendment or supplement referred to in Section 10.01(a)
hereof shall be delivered by the Owner Trustee to the Indenture Trustee and each
holder of a Secured Certificate.

            SECTION 10.02. Discretion as to Execution of Documents. Prior to
executing any document required to be executed by it pursuant to the terms of
Section 10.01 hereof, the Owner Trustee shall be entitled to receive an opinion
of its counsel to the effect that the execution of such document is authorized
hereunder. If in the opinion of the Owner Trustee any such document adversely
affects any right, duty, immunity or indemnity in favor of the Owner Trustee
hereunder or under any other Operative Document to which the Owner Trustee is a
party, the Owner Trustee may in its discretion decline to execute such document.


            SECTION 10.03. Absence of Requirements as to Form. It shall not be
necessary for any written request furnished pursuant to Section 10.01 hereof to
specify the particular form of the proposed documents to be executed pursuant to
such Section, but it shall be sufficient if such request shall indicate the
substance thereof.

            SECTION 10.04. Distribution of Documents. Promptly after the
execution by the Owner Trustee of any document entered into pursuant to Section
10.01 hereof, the Owner Trustee shall mail, by certified mail, postage prepaid,
a conformed copy thereof to the Owner Participant, but the failure of the Owner
Trustee to mail such conformed copy shall not impair or affect the validity of
such document.

            SECTION 10.05. No Request Needed as to Lease Supplement and Trust
Supplement. No written request pursuant to Section 10.01 hereof shall be
required to enable the Owner Trustee to enter into the Lease Supplement covering
the Aircraft with Lessee pursuant to the terms of the Lease and Section 3.01
hereof and the Trust Supplement pursuant to the terms of the Trust Indenture and
Section 3.01 hereof.

                                   ARTICLE XI

                                  MISCELLANEOUS

            SECTION 11.01. Termination of Trust Agreement. This Trust Agreement
and the trusts created hereby shall be of no further force or effect upon the
earlier of (a) both the final discharge of the Trust Indenture pursuant to
Section 10.01 thereof and the sale or other final disposition by the Owner
Trustee of all property constituting part of the Trust Estate and the final
distribution by the Owner Trustee of all monies or other property or proceeds
constituting part of the Trust Estate in accordance with Article IV hereof,
provided that at such time Lessee shall have fully complied with all of the
terms of the Lease and the Participation Agreement or (b) twenty-one years less
one day after the death of the last survivor of all of the descendants of the
grandparents of David Rockefeller living on the date of the earliest execution
of this Trust Agreement by any party hereto; otherwise this Trust Agreement and
the trusts created hereby shall continue in full force and effect in accordance
with the terms hereof.


                                      -16-
<PAGE>

            SECTION 11.02. Owner Participant Has No Legal Title in Trust Estate.
The Owner Participant shall not have legal title to any part of the Trust
Estate. No transfer, by operation of law or otherwise, of any right, title and
interest of the Owner Participant in and to the Trust Estate hereunder shall
operate to terminate this Trust Agreement or the trusts hereunder or entitle any
successors or transferees of the Owner Participant to an accounting or to the
transfer of legal title to any part of the Trust Estate.

            SECTION 11.03. Assignment, Sale, etc. of Aircraft. Any assignment,
sale, transfer or other conveyance of its interest in the Aircraft by the Owner
Trustee made pursuant to the terms hereof or of the Lease or the Participation
Agreement shall bind the Owner Participant and shall be effective to transfer or
convey all right, title and interest of the Owner Trustee and the Owner
Participant in and to the Aircraft. No purchaser or other grantee shall be
required to inquire as to the authorization, necessity, expediency or regularity
of such assignment, sale, transfer or conveyance or as to the application of any
sale or other proceeds with respect thereto by the Owner Trustee.

            SECTION 11.04. Trust Agreement for Benefit of Certain Parties Only.
Except for the terms of Section 8(n) of the Participation Agreement incorporated
in Article VIII hereof and except as otherwise provided in Articles IX and X
hereof, nothing herein, whether expressed or implied, shall be construed to give
any Person other than the Owner Trustee and the Owner Participant any legal or
equitable right, remedy or claim under or in respect of this Trust Agreement;
but this Trust Agreement shall be held to be for the sole and exclusive benefit
of the Owner Trustee and the Owner Participant.

            SECTION 11.05. Notices; Consent to Jurisdiction. (a) All notices,
demands, instructions and other communications required or permitted to be given
to or made upon any party hereto shall be in writing and shall be personally
delivered or sent by registered or certified mail, postage prepaid, or by
telecopier, or by prepaid courier service, and shall be deemed to be given for
purposes of this Trust Agreement on the day that such writing is delivered or
sent to the intended recipient thereof in accordance with the provisions of this
Section 11.05(a). Unless otherwise specified in a notice sent or delivered in
accordance with the foregoing provisions of this Section 11.05(a), notices,
demands, instructions and other communications in writing shall be given to or
made upon the respective parties hereto at their respective addresses (or to
their respective telecopier numbers) as follows: (A) if to Lessee, the Owner
Trustee, the Loan Participants, the Indenture Trustee or the Owner Participant,
to the respective addresses set forth below the signatures of such parties on
the signature page of the Participation Agreement, or (B) if to a Subsequent
Owner Participant, addressed to such Subsequent Owner Participant at such
address as such Subsequent Owner Participant shall have furnished by notice to
the parties hereto or (C) if to any subsequent Certificate Holder, addressed to
such Certificate Holder at its address set forth in the secured certificate
register maintained pursuant to Section 2.07 of the Trust Indenture.

            (b) Each of the parties hereto (A) hereby irrevocably submits itself
to the non-exclusive jurisdiction of the United States District Court for the
Southern District of New York and to the non-exclusive jurisdiction of the
Supreme Court of the State of New York, New York County, for the purposes of any
suit, action or other proceeding arising out of this Trust Agreement, the
Participation Agreement, the Lease, the Tax Indemnity Agreement or any other


                                      -17-
<PAGE>

Operative Document, the subject matter of any thereof or any of the transactions
contemplated hereby or thereby brought by any party or parties thereto, or their
successors or assigns, and (B) hereby waives, and agrees not to assert, by way
of motion, as a defense, or otherwise, in any such suit, action or proceeding,
to the extent permitted by applicable law, that the suit, action or proceeding
is brought in an inconvenient forum, that the venue of the suit, action or
proceeding is improper, or that the Participation Agreement, the Lease, the Tax
Indemnity Agreement or any other Operative Document or the subject matter of any
thereof or any of the transactions contemplated hereby or thereby may not be
enforced in or by such courts.

            SECTION 11.06. Severability. Any provision hereof which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof, and any such prohibition or
unenforceability in any jurisdiction shall not invalidate or render
unenforceable such provision in any other jurisdiction.

            SECTION 11.07. Waivers, etc. No term or provision hereof may be
changed, waived, discharged or terminated orally, but only by an instrument in
writing entered into in compliance with the terms of Article X hereof; and any
waiver of the terms hereof shall be effective only in the specific instance and
for the specific purpose given.

            SECTION 11.08. Counterparts. This Trust Agreement may be executed by
the parties hereto in separate counterparts, each of which when so executed and
delivered shall be an original, but all such counterparts shall together
constitute but one and the same instrument.

            SECTION 11.09. Binding Effect, etc. All covenants and agreements
contained herein shall be binding upon, and inure to the benefit of, the Owner
Trustee and its successors and assigns, and the Owner Participant, its
successors and, to the extent permitted by Article VIII hereof, its assigns. Any
request, notice, direction, consent, waiver or other instrument or action by the
Owner Participant shall bind its successors and assigns. Any Owner Participant
which shall cease to have any Ownership Interest shall thereupon cease to be a
party hereto or an Owner Participant for any reason and shall have no further
obligations hereunder.

            SECTION 11.10. Headings; References. The headings of the various
Articles and Sections herein are for convenience of reference only and shall not
define or limit any of the terms or provisions hereof.

            SECTION 11.11. GOVERNING LAW. THIS TRUST AGREEMENT SHALL IN ALL
RESPECTS BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE
OF UTAH, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE.


                                      -18-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Trust
Agreement to be duly executed by their respective officers thereunto duly
authorized as of the day and year first above written.


                                        [__________________________]

                                        By:
                                            ------------------------------------
                                            Name:
                                            Title:


                                        FIRST SECURITY BANK,
                                        NATIONAL ASSOCIATION

                                        By:
                                            ------------------------------------
                                            Name:
                                            Title:


                                      -19-



================================================================================

                                    GUARANTEE
                                  [NW ____ __]

                           Dated as of [_____________]

                                      from

                         NORTHWEST AIRLINES CORPORATION

                  One Airbus [A320-212] [A319-113] Aircraft

================================================================================
<PAGE>

                         TABLE OF CONTENTS TO GUARANTEE

                                                                          Page
                                                                          ----

1.    Guarantee..............................................................1

2.    No Implied Third Party Beneficiaries...................................3

3.    Waiver; No Set-off; Reinstatement; Subrogation.........................4

4.    Amendments, Etc........................................................4

5.    Payments...............................................................4

6.    Assignment of Guarantee................................................4

7.    Jurisdictional Matters.................................................5

8.    Integration; Counterparts; Successors and Assigns; Headings............5

9.    Notices................................................................5

10.   No Waivers.............................................................5

11.   Survival...............................................................6

12.   Severability...........................................................6

13.   GOVERNING LAW..........................................................6

14.   Enforcement Expenses...................................................6

15.   Termination............................................................6

16.   No Guarantee of Secured Certificates...................................6


                                      -i-
<PAGE>

                                    GUARANTEE
                                  [NW ____ __]

            This GUARANTEE [NW ____ __], dated as of [_____________] (as
amended, modified or supplemented from time to time, this "Guarantee"), from
NORTHWEST AIRLINES CORPORATION, a Delaware corporation (together with its
permitted successors and assigns, the "Guarantor"), to the parties listed in
Schedule I hereto (collectively, together with their successors and permitted
assigns, the "Parties", and, individually, a "Party").

            WHEREAS, Northwest Airlines, Inc., a Minnesota corporation (the
"Lessee"), an indirect wholly-owned subsidiary of the Guarantor, wishes to enter
into a Lease Agreement [NW ____ __], dated as of the date hereof (as amended,
modified or supplemented from time to time, the "Lease"), between the Lessee and
First Security Bank, National Association, not in its individual capacity but
solely as Owner Trustee (as defined therein), except as expressly provided
therein (the "Lessor"), initially relating to one (1) Airbus [A320-212]
[A319-113] aircraft, together with two (2) CFM International, Inc. Model
CFM56-5A[3][4] engines (such aircraft and engines, and any substitute Airframe
and Engines under the Lease, being collectively referred to herein as the
"Aircraft"), pursuant to a Participation Agreement [NW ____ __], dated as of the
date hereof (as amended, modified or supplemented from time to time, the
"Participation Agreement"), among the Lessee, the Parties and certain other
entities; and

            WHEREAS, it is a condition precedent to the obligations of the
Parties to consummate the transactions contemplated by the Participation
Agreement that the Guarantor execute and deliver this Guarantee; and

            WHEREAS, the Lessor will assign by way of collateral security
certain of its right, title and interest in and to this Guarantee to the
Indenture Trustee, pursuant to a Trust Indenture and Security Agreement [NW ____
__], dated as of the date hereof, between the Lessor and the Indenture Trustee
(as amended, modified or supplemented from time to time, the "Trust Indenture"),
as security for the obligations of the Lessor referred to therein; and

            WHEREAS, the capitalized terms used herein that are not defined
herein are used herein as defined in the Lease;

            NOW, THEREFORE, in order to induce the Lessor to enter into the
Lease and to induce the other Parties referred to above to enter into the
Participation Agreement and for other good and valuable consideration, receipt
of which is hereby acknowledged, the parties hereto agree as follows:

            1. Guarantee.

            (a) The Guarantor does hereby acknowledge that it is fully aware of
the terms and conditions of the Lease, the Participation Agreement and the other
Operative Documents and the transactions and the other documents contemplated
thereby, and does hereby irrevocably and fully and unconditionally guarantee, as
primary obligor and not as surety merely, to the Parties, as their respective
interests may appear, the payment by the Lessee of all payment obligations when
due under the Lease (including, without limitation, Basic Rent and Supplemental
Rent), the
<PAGE>

Participation Agreement, the Tax Indemnity Agreement and the other Operative
Documents to which the Lessee is a party (such obligations of the Lessee
guaranteed hereby being hereafter referred to, individually, as a "Financial
Obligation" and, collectively, as the "Financial Obligations") in accordance
with the terms of the Operative Documents, and the timely performance of all
other obligations of the Lessee thereunder (individually, a "Nonfinancial
Obligation" and, collectively, the "Nonfinancial Obligations" or, collectively
with the Financial Obligations, the "Obligations"). The Guarantor does hereby
agree that in the event that the Lessee fails to pay any Financial Obligation
when due for any reason (including, without limitation, the liquidation,
dissolution, receivership, insolvency, bankruptcy, assignment for the benefit of
creditors, reorganization, arrangement, composition or readjustment of, or other
similar proceedings affecting the status, existence, assets or obligations of,
the Lessee, or the disaffirmance with respect to the Lessee of the Lease or any
other Operative Document to which the Lessee is a party in any such proceeding)
within five days after the date on which such Financial Obligation became due
and payable and the applicable grace period has expired, the Guarantor shall pay
or cause to be paid forthwith, upon the receipt of notice from any Party (such
notice to be sent to the Lessee (to the extent such Party is not stayed or
prevented from doing so by operation of law) and the Guarantor) stating that
such Financial Obligation was not paid when due and for five days after the
applicable grace period has expired, the amount of such Financial Obligation.
The Guarantor hereby agrees that in the event the Lessee fails to perform any
Nonfinancial Obligation for any reason (including, without limitation, the
liquidation, dissolution, receivership, insolvency, bankruptcy, assignment for
the benefit of creditors, reorganization, arrangement, composition or
readjustment of, or other similar proceedings affecting the status, existence,
assets or obligations of, the Lessee, or the disaffirmance with respect to the
Lessee of the Lease or any other Operative Document to which the Lessee is a
party in any such proceeding) within 10 Business Days after the date on which
such Nonfinancial Obligation is required to be performed (for avoidance of
doubt, to include any applicable grace period), the Guarantor shall cause such
Nonfinancial Obligation to be performed within 10 Business Days following the
receipt of notice from any Party (such notice to be sent to the Lessee (to the
extent such Party is not stayed or prevented from doing so by operation of law)
and the Guarantor) stating that such Nonfinancial Obligation was not performed
when so required and that any applicable grace period has expired.

            (b) The obligations of the Guarantor hereunder shall not be, to the
fullest extent permitted by law, affected by: the genuineness, validity,
regularity or enforceability (or lack thereof) of any of the Lessee's
obligations under the Lease or any other Operative Document to which the Lessee
is a party, any amendment, waiver or other modification of the Lease or such
other Operative Document (except that any such amendment or other modification
shall be given effect in determining the obligations of the Guarantor
hereunder), or by any substitution, release or exchange of collateral for or
other guaranty of any of the Obligations (except to the extent that such
substitution, release or exchange is undertaken in accordance with the terms of
the Operative Documents) without the consent of the Guarantor, or by any
priority or preference to which any other obligations of the Lessee may be
entitled over the Lessee's obligations under the Lease and the other Operative
Documents to which the Lessee is a party, or by any other circumstance that
might otherwise constitute a legal or equitable defense to or discharge of the
obligations of a surety or guarantor including, without limitation, any defense
arising out of any laws of the United States of America or any State thereof
which would excuse, discharge, exempt, modify or delay the due or punctual
payment and performance of the


                                      -2-
<PAGE>

obligations of the Guarantor hereunder. Without limiting the generality of the
foregoing, it is agreed that the occurrence of any one or more of the following
shall not, to the fullest extent permitted by law, affect the liability of the
Guarantor hereunder: (a) the extension of the time for or waiver of, at any time
or from time to time, without notice to the Guarantor, the Lessee's performance
of or compliance with any of its obligations under the Operative Documents
(except that such extension or waiver shall be given effect in determining the
obligations of the Guarantor hereunder), (b) any assignment, transfer, sublease
or other arrangement by which the Lessee transfers possession or loses control
of the use of the Aircraft, (c) any defect in the title, condition, design,
operation or fitness for use of, or damage to or loss or destruction of, the
Aircraft, whether or not due to the fault of the Lessee, (d) any merger or
consolidation of the Lessee or the Guarantor into or with any other Person, or
any sale, transfer, lease or disposal of any of its assets or (e) any change in
the ownership of any shares of capital stock of the Lessee.

            (c) This Guarantee is an absolute, present and continuing guaranty
of payment and performance and not of collectability and is in no way
conditional or contingent upon any attempt to collect from the Lessee any unpaid
amounts due or otherwise to enforce performance by the Lessee. The Guarantor
specifically agrees, to the fullest extent permitted by law, that it shall not
be necessary or required, and that the Guarantor shall not be entitled to
require, that any Party (i) file suit or proceed to obtain or assert a claim for
personal judgment against the Lessee for the Obligations, or (ii) make any
effort at collection of the Obligations from the Lessee, or (iii) foreclose
against or seek to realize upon any security now or hereafter existing for the
Obligations, including the Trust Estate or the Trust Indenture Estate, or (iv)
file suit or proceed to obtain or assert a claim for personal judgment against
any other Person liable for the Obligations, or make any effort at collection of
the Obligations from any such other Person, or exercise or assert any other
right or remedy to which any Party is or may be entitled in connection with the
Obligations or any security or other guaranty therefor, or (v) assert or file
any claim against the assets of the Lessee or any other guarantor or other
Person liable for the Obligations, or any part thereof, before or as a condition
of enforcing the liability of the Guarantor under this Guarantee or requiring
payment of said Obligations by the Guarantor hereunder, or at any time
thereafter.

            (d) The Guarantor agrees, to the fullest extent permitted by law,
that, without limiting the generality of this Guarantee, if an Event of Default
shall have occurred and be continuing and the Lessor (or any assignee thereof
including, without limitation, the Indenture Trustee) shall be prevented by
applicable law from exercising its remedies (or any of them) under Section 15 of
the Lease, the Lessor (or any assignee thereof, including, without limitation,
the Indenture Trustee) shall be, nevertheless, entitled to receive hereunder
from the Guarantor, upon demand therefor the sums that would otherwise have been
due from the Lessee under the Lease had such remedies been able to be exercised.
The Guarantor hereby unconditionally waives, to the fullest extent permitted by
law, any requirement that, as a condition precedent to the enforcement of the
obligations of the Guarantor hereunder, the Lessee or all or any one or more of
any other guarantors of any of the Obligations be joined as parties to any
proceedings for the enforcement of any provision of this Guarantee.

            2. No Implied Third Party Beneficiaries. This Guarantee shall not be
deemed to create any right in any Person except a Party and shall not be
construed in any respect to be a contract in whole or in part for the benefit of
any other Person.


                                      -3-
<PAGE>

            3. Waiver; No Set-off; Reinstatement; Subrogation. The Guarantor
waives notice of the acceptance of this Guarantee and of the performance or
nonperformance by the Lessee, demand for payment from the Lessee or any other
Person, notice of nonpayment or failure to perform on the part of the Lessee,
diligence, presentment, protest, dishonor and, to the fullest extent permitted
by law, all other demands or notices whatsoever, other than the request for
payment hereunder and notice provided for in Section 1 hereof. The obligations
of the Guarantor shall be absolute and unconditional and shall remain in full
force and effect until satisfaction of all Obligations hereunder and, without
limiting the generality of the foregoing, to the extent not prohibited by
applicable law, shall not be released, discharged or otherwise affected by the
existence of any claims, set-off, defense or other rights that the Guarantor may
have at any time and from time to time against any Party, whether in connection
herewith or any unrelated transactions. This Guarantee shall continue to be
effective or be reinstated, as the case may be, if at any time any payment of
any Financial Obligation is rescinded or must otherwise be returned by any Party
upon the insolvency, bankruptcy, reorganization, arrangement, readjustment of
debt, dissolution, liquidation or similar proceeding with respect to the Lessee
or otherwise, all as though such payment had not been made. The Guarantor, by
virtue of any payment or performance hereunder to a Party, shall be subrogated
to such Party's claim against the Lessee or any other Person relating thereto;
provided, however, that the Guarantor shall not be entitled to receive payment
from the Lessee in respect of any claim against the Lessee arising from a
payment by the Guarantor in the event of any insolvency, bankruptcy,
liquidation, reorganization or other similar proceedings relating to the Lessee,
or in the event of any proceedings for voluntary liquidation, dissolution or
other winding-up of the Lessee, whether or not involving insolvency or
bankruptcy proceedings, in which case the Obligations shall be paid and
performed in full before any payment in respect of a claim by the Guarantor
shall be made by or on behalf of the Lessee.

            4. Amendments, Etc. No amendment of or supplement to this Guarantee,
or waiver or modification of, or consent under, the terms hereof, shall be
effective unless evidenced by an instrument in writing signed by the Guarantor
and each Party against whom such amendment, supplement, waiver, modification or
consent is to be enforced.

            5. Payments. All payments by the Guarantor hereunder in respect of
any Obligation shall be made in Dollars and otherwise as provided in the Lease,
the Participation Agreement or any other Operative Document in which such
Obligation is contained; provided that the Guarantor consents to all the terms
of the Trust Indenture and agrees to make all payments hereunder directly to the
Indenture Trustee until such time as the Indenture Trustee shall give notice to
the Guarantor that the Lien of the Trust Indenture has been fully discharged and
thereafter to the Owner Trustee; provided, further, that the Guarantor shall pay
directly to the Lessor, in its individual capacity, or to the Owner Participant
or another Party, as the case may be, any amount owing to such Person as
Supplemental Rent for indemnities provided in Section 7 of the Participation
Agreement or the Tax Indemnity Agreement or otherwise not constituting part of
the Trust Indenture Estate.

            6. Assignment of Guarantee. As and to the extent provided in the
Trust Indenture, the Lessor will assign, and create a security interest in,
certain of its rights hereunder to and for the benefit of the Indenture Trustee.
From and after the execution and delivery of the Trust Indenture, and until
receipt by the Guarantor of a written notice from the Indenture Trustee


                                      -4-
<PAGE>

to the effect that the Trust Indenture has been fully satisfied and discharged,
no remedy or election hereunder may be exercised by the Lessor or consent given
by the Lessor, except by or with the prior written consent of the Indenture
Trustee, and the Guarantor will make payment of all amounts hereunder that are
assigned to the Indenture Trustee directly to the Indenture Trustee, and such
payments shall discharge the obligations of the Guarantor to the Lessor to the
extent of such payments.

            7. Jurisdictional Matters. The Guarantor (a) hereby irrevocably
submits itself to the non-exclusive jurisdiction of the United States District
Court for the Southern District of New York and to the non-exclusive
jurisdiction of the Supreme Court of the State of New York, New York County, for
the purposes of any suit, action or other proceeding arising out of this
Guarantee brought by any party, and (b) hereby waives, and agrees not to assert,
by way of motion, as a defense, or otherwise, in any such suit, action or
proceeding, to the extent permitted by applicable law, that the suit, action or
proceeding is brought in an inconvenient forum, that the venue of the suit,
action or proceeding is improper, or that this Guarantee may not be enforced in
or by such courts. The Guarantor hereby generally consents to service of process
at Cadwalader, Wickersham & Taft, 100 Maiden Lane, New York, New York 10038,
Attention: Managing Attorney, or such office of the Guarantor in New York City
as from time to time may be designated by the Guarantor in writing to the
Parties.

            8. Integration; Counterparts; Successors and Assigns; Headings. This
Guarantee (a) constitutes the entire agreement, and supersedes all prior
agreements and understandings, both written and oral, among the Guarantor and
the Parties, with respect to the subject matter hereof, (b) may be executed in
several counterparts, each of which shall be deemed an original, but all of
which together shall constitute one and the same instrument, and (c) shall be
binding upon the successors and assigns of the Guarantor and shall inure to the
benefit of, and shall be enforceable by, each of the Parties to the fullest
extent permitted by applicable laws. The headings in this Guarantee are for
purposes of reference only, and shall not limit or otherwise affect the meanings
hereof.

            9. Notices. All requests, notices or other communications hereunder
shall be in writing, addressed as follows:

            If to the Guarantor:

                        to the address or telecopy number set forth in the
                        Participation Agreement

            If to a Party:

                        to the address or telecopy number set forth in the
                        Participation Agreement

All requests, notices or other communications shall be given in the manner, and
shall be effective at the times and under the terms, set forth in Section 13(b)
of the Participation Agreement.

            10. No Waivers. No failure on the part of any Party to exercise, no
delay in exercising, and no course of dealing with respect to, any right or
remedy hereunder will operate


                                      -5-
<PAGE>

as a waiver thereof; nor will any single or partial exercise of any right or
remedy hereunder preclude any other or further exercise of such right or remedy
or the exercise of any other right or remedy.

            11. Survival. All representations and warranties contained herein or
made in writing by the Guarantor in connection herewith shall survive the
execution and delivery of this Guarantee regardless of any investigation made by
any Party or any other Person.

            12. Severability. To the fullest extent permitted by applicable law,
any provision of this Guarantee that is prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining
provisions hereof or any provision in any other Operative Document, and any such
prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

            13. GOVERNING LAW. THIS GUARANTEE IS DELIVERED IN, AND SHALL (AND
THE RIGHTS AND DUTIES OF THE GUARANTOR AND THE PARTIES SHALL) IN ALL RESPECTS BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. THIS
GUARANTEE SHALL BE DEEMED MADE WHEN DELIVERED IN NEW YORK, NEW YORK.

            14. Enforcement Expenses. The Guarantor agrees to pay to any Party
any and all reasonable costs and expenses (including reasonable legal fees and
expenses) incurred by such Party in enforcing, or collecting under, this
Guarantee.

            15. Termination. Subject to the provisions of Section 3 hereof, this
Guarantee shall terminate upon the indefeasible payment and performance in full
of all of the Obligations.

            16. No Guarantee of Secured Certificates. This Guarantee relates
only to the Obligations described in Section 1 and nothing in this Guarantee
shall be deemed to constitute a guarantee of payment of any of the Secured
Certificates or shall give rise to any inference that the Lessee or the
Guarantor has so guaranteed such payment.


                                      -6-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Guarantee to
be duly executed as of the date first hereinabove set forth.

                                    NORTHWEST AIRLINES CORPORATION


                                    By: ______________________________________
                                        Name:
                                        Title:

Accepted as of the above date:

FIRST SECURITY BANK,
NATIONAL ASSOCIATION
      in its individual capacity
      and as Owner Trustee

By: __________________________________
    Name:
    Title:

STATE STREET BANK AND
TRUST COMPANY
      in its individual capacity
      and as Indenture Trustee

By: __________________________________
    Name:
    Title:


                                      -7-
<PAGE>

                                   SCHEDULE I
                                  TO GUARANTEE
                                  [NW ____ __]

                                     PARTIES


First Security Bank, National Association,
      in its individual capacity and as Owner Trustee

State Street Bank and Trust Company, as Indenture Trustee

[Owner Participant]



================================================================================

                             PARTICIPATION AGREEMENT
                                   [NW ____ _]

                                   Dated as of
                              [__________________]

                                      Among

                            NORTHWEST AIRLINES, INC.,
                                                Owner,

                         NORTHWEST AIRLINES CORPORATION,
                                                Guarantor,

                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION,
                                                Pass Through Trustee under
                                                each of the Pass Through
                                                Trust Agreements,

                      STATE STREET BANK AND TRUST COMPANY,
                                                Subordination Agent,

                                       and

                      STATE STREET BANK AND TRUST COMPANY,
                                                in its Individual Capacity
                                                and as Indenture Trustee

                            ---------------------

                  One Airbus [A320-212] [A319-113] Aircraft
                                    N[_____]

================================================================================
<PAGE>

                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----

SECTION 1.  Purchase of Secured Certificates by Pass Through
            Trustees.........................................................2

SECTION 2.  Owner's Notice of Closing Date...................................3

SECTION 3.  [Intentionally Omitted]..........................................3

SECTION 4.  Conditions.......................................................3
              (a)   Conditions Precedent to Purchase of Secured
                    Certificates.............................................3
              (b)   Conditions Precedent to the Obligations of the
                    Owner and the Guarantor..................................8

SECTION 5.  [Intentionally Omitted]..........................................9

SECTION 6.  Extent of Interest of Certificate Holders........................9

SECTION 7.  Representations and Warranties of the Owner and the
            Guarantor; Indemnities..........................................10
              (a)   Representations and Warranties..........................10
              (b)   General Tax Indemnity...................................12
              (c)   General Indemnity.......................................13
              (d)   Income Tax..............................................13

SECTION 8.  Representations, Warranties and Covenants.......................13

SECTION 9.  Reliance of Liquidity Provider..................................22

SECTION 10. Other Documents.................................................22

SECTION 11. Certain Covenants of the Owner..................................22

SECTION 12. [Intentionally Omitted].........................................22

SECTION 13. Certain Definitions; Notices; Consent to Jurisdiction...........22

SECTION 14. [Intentionally Omitted].........................................23

SECTION 15. Miscellaneous...................................................23

SECTION 16. Sale/leaseback Transaction......................................24


                                      -i-
<PAGE>

                                    SCHEDULES

SCHEDULE I     -  Names and Addresses

SCHEDULE II    -  Commitments

SCHEDULE III   -  Pass Through Trust Agreements

                                    EXHIBITS

Exhibit A      -  Schedule of Countries Authorized for
                     Reregistration

Exhibit B-1    -  Form of Opinion of Simpson Thacher & Bartlett,
                     special counsel for the Owner and the Guarantor

Exhibit B-2    -  Form of Opinion of Cadwalader, Wickersham & Taft,
                     special counsel for the Owner and the Guarantor

Exhibit B-3    -  Form of Opinion of the Owner's Legal Department

Exhibit C      -  Form of Opinion of counsel for the Supplier and
                     the Manufacturer

Exhibit D      -  [Intentionally Omitted]

Exhibit E-1    -  [Intentionally Omitted]

Exhibit E-2    -  [Intentionally Omitted]

Exhibit F      -  Form of Opinion of Crowe & Dunlevy, P.C.

Exhibit G      -  Form of Opinion of Bingham Dana LLP, special
                     counsel for the Indenture Trustee

Exhibit H-1    -  [Intentionally Omitted]

Exhibit H-2    -  [Intentionally Omitted]

Exhibit I      -  Form of ss.1110 Opinion of Cadwalader, Wickersham
                      & Taft, special counsel for the Owner

Exhibit J-1    -  Form of Opinion of Bingham Dana LLP, special counsel
                     for the Pass Through Trustee

Exhibit J-2    -  Form of Opinion of Bingham Dana LLP, special counsel
                     for the Subordination Agent

Exhibit K      -  Section 7(b) - General Tax Indemnity

Exhibit L      -  Section 7(c) - General Indemnity


                                      -ii-
<PAGE>

                             PARTICIPATION AGREEMENT
                                   [NW ____ _]

            THIS PARTICIPATION AGREEMENT [NW ____ _] dated as of
[_______________], among (i) NORTHWEST AIRLINES, INC., a Minnesota corporation
(the "Owner"), (ii) NORTHWEST AIRLINES CORPORATION, a Delaware corporation (the
"Guarantor"), (iii) STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT, NATIONAL
ASSOCIATION, not in its individual capacity except as otherwise provided herein,
but solely as trustee (in such capacity, the "Pass Through Trustee") under each
of [three] separate Pass Through Trust Agreements (as defined below), (iv) STATE
STREET BANK AND TRUST COMPANY, not in its individual capacity, but solely as
subordination agent and trustee (in such capacity, the "Subordination Agent")
under the Intercreditor Agreement (defined below), and (v) STATE STREET BANK AND
TRUST COMPANY, a Massachusetts trust company, in its individual capacity and as
Indenture Trustee under the Trust Indenture (as hereinafter defined) (herein, in
such latter capacity together with any successor indenture trustee, called the
"Indenture Trustee") (this "Agreement");

                              W I T N E S S E T H:

            WHEREAS, pursuant to the Purchase Agreement between the Owner and
the Supplier, the Supplier has agreed to sell to the Owner, among other things,
certain Airbus Industrie [A320-212] [A319-113] aircraft, including the Aircraft
which has been [or is being] delivered by the Supplier to the Owner and is the
subject of this Agreement;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, the Manufacturer and the Supplier have executed the Manufacturer
Consent and Agreement to Assignment of Warranties [NW _____ __] and the Supplier
Consent and Agreement to Assignment of Warranties [NW ____ _] (herein
collectively called the "Consent and Agreement");

            WHEREAS, the Indenture Trustee and the Owner concurrently with the
execution and delivery of this Agreement are entering into the Trust Indenture
and Security Agreement [NW ____ _], dated as of the date hereof (said Trust
Indenture and Security Agreement, as the same may be amended or supplemented
from time to time, being herein called the "Trust Indenture", such term to
include, unless the context otherwise requires, the Trust Indenture Supplement
referred to below) pursuant to which the Owner will issue secured certificates
substantially in the form set forth in Section 2.01 thereof (the "Secured
Certificates", and individually, a "Secured Certificate") in three series, which
Secured Certificates are to be secured by the mortgage and security interests
created by the Owner in favor of the Indenture Trustee, and the Owner shall
execute and deliver a Trust Indenture Supplement substantially in the form of
Exhibit A to the Trust Indenture (the "Trust Indenture Supplement") covering the
Aircraft, supplementing the Trust Indenture;
<PAGE>

            WHEREAS, concurrently with the execution and delivery of this
Agreement; the Guarantor is entering into a Guarantee [NW ____ _], dated as of
the date hereof, pursuant to which the Guarantor guarantees certain obligations
of the Owner under the Operative Documents (the "Guarantee");

            WHEREAS, pursuant to the Pass Through Trust Agreement and each of
the Pass Through Trust Supplements set forth in Schedule III hereto
(collectively, the "Pass Through Trust Agreements"), on the Issuance Date three
separate trusts (collectively, the "Pass Through Trusts" and, individually, a
"Pass Through Trust") were created to facilitate the transactions contemplated
hereby, including, without limitation, the issuance and sale by each Pass
Through Trust of pass through certificates pursuant thereto (collectively, the
"Certificates");

            WHEREAS, the proceeds from the issuance and sale of the Certificates
by each Pass Through Trust will be applied in part by the Pass Through Trustee
on the Closing Date to purchase from the Owner, on behalf of each Pass Through
Trust, all of the Secured Certificates bearing the same interest rate as the
Certificates issued by such Pass Through Trust;

            WHEREAS, on the Issuance Date (i) Citibank, N.A. (the "Liquidity
Provider") entered into three revolving credit agreements (each, a "Liquidity
Facility"), one for the benefit of the holders of Certificates of each Pass
Through Trust, with the Subordination Agent, as agent for the Pass Through
Trustee on behalf of each such Pass Through Trust; and (ii) the Pass Through
Trustee, the Liquidity Provider and the Subordination Agent entered into the
Intercreditor Agreement, dated June 25, 1999 (the "Intercreditor Agreement");

            WHEREAS, the Secured Certificates will be held by the Subordination
Agent pursuant to the Intercreditor Agreement on behalf of the Pass Through
Trusts;

            WHEREAS, in order to facilitate the transactions contemplated
hereby, the Owner and the Guarantor have entered into the Underwriting
Agreement, dated as of June 18, 1999, among the Owner, the Guarantor and the
several underwriters named therein (the "Underwriting Agreement"); and

            WHEREAS, certain terms are used herein as defined in Section 13(a)
hereof;

            NOW, THEREFORE, in consideration of the mutual agreements herein
contained, the parties hereto agree as follows:

            SECTION 1. Purchase of Secured Certificates by Pass Through
Trustees. (a) Purchase of Secured Certificates by Pass Through Trustees. Subject
to the terms and conditions of this Agreement, the Pass Through Trustee for each
Pass Through Trust agrees to purchase the Secured Certificates set forth on
Schedule II opposite the name of such Pass Through Trust by paying to the Owner
the aggregate purchase price of the Secured Certificates being issued to such
Pass Through Trustee as set forth on Schedule II opposite the name of such


                                      -2-
<PAGE>

Pass Through Trust. The Pass Through Trustees shall make such payments to the
Owner on a date to be designated pursuant to Section 2 hereof, but in no event
later than [__________], by transferring to the account of the Owner at USBank,
Minneapolis, ABA No. 091-000-022, Account No. 1502-5009-9440, Reference:
Northwest/NW [____ __], not later than 9:30 a.m., New York City time, on the
Closing Date in immediately available funds in Dollars, the amount set forth
opposite the name of such Pass Through Trust on Schedule II hereto.

            Upon the occurrence of the above transfers by the Pass Through
Trustee for each Pass Through Trust to the Owner, the Owner shall issue,
pursuant to Article II of the Trust Indenture, to the Subordination Agent on
behalf of the Pass Through Trustee for each of the Pass Through Trusts, Secured
Certificates of the maturity and aggregate principal amount, bearing the
interest rate and for the purchase price set forth on Schedule II hereto
opposite the name of such Pass Through Trust.

            (b)   [Intentionally Omitted].

            (c) General Provisions. The amount of the payment of each Pass
Through Trustee to be made as provided above is hereinafter called such party's
"Commitment" for the Aircraft.

            SECTION 2. Owner's Notice of Closing Date. The Owner agrees to give
the Pass Through Trustee and the Indenture Trustee at least two Business Days'
telecopy or other written notice of the Closing Date, which Closing Date shall
be a Business Day, which notice shall specify the amount of each Pass Through
Trustee's Commitment for the Aircraft. As to each Pass Through Trustee, the
making of its Commitment for the Aircraft available in the manner required by
Section 1 shall constitute a waiver of such notice.

            SECTION 3. [Intentionally Omitted].

            SECTION 4. Conditions. (a) Conditions Precedent to Purchase of
Secured Certificates. It is agreed that the obligations of each Pass Through
Trustee to purchase Secured Certificates and to make available the amount of its
Commitment is subject to the satisfaction prior to or on the Closing Date of the
following conditions precedent:

            (i) The Pass Through Trustee shall have received due notice with
      respect to such participation pursuant to Section 2 hereof (or shall have
      waived such notice either in writing or as provided in Section 2).

            (ii) No change shall have occurred after the date of the execution
      and delivery of this Agreement in applicable law or regulations or
      guidelines or interpretations thereof by appropriate regulatory
      authorities which would make it a violation of law or regulations or
      guidelines for the Pass Through Trustee to make its Commitment available
      in accordance with Section 1 hereof.

            (iii) [Intentionally Omitted].

            (iv) [Intentionally Omitted].


                                      -3-
<PAGE>

            (v) The following documents shall have been duly authorized,
      executed and delivered by the respective party or parties thereto, shall
      each be satisfactory in form and substance to the Pass Through Trustee and
      shall be in full force and effect and executed counterparts shall have
      been delivered to the Pass Through Trustee or its counsel, provided that
      only the Subordination Agent on behalf of each Pass Through Trustee shall
      receive an executed original of such Pass Through Trustee's respective
      Secured Certificate and provided, further, that an excerpted copy of the
      Purchase Agreement shall only be delivered to and retained by the
      Indenture Trustee, which copy may be inspected and reviewed by the
      Indenture Trustee if and only if there shall occur and be continuing an
      Event of Default:

                  (1) an excerpted copy of the Purchase Agreement (insofar as it
            relates to the Aircraft) and the Guaranty;

                  (2) the Trust Indenture;

                  (3) the Trust Indenture Supplement covering the Aircraft dated
            the Closing Date;

                  (4) the Secured Certificates;

                  (5) the Consent and Agreement;

                  (6) the Guarantee; and

                  (7) the French Pledge Agreement.

            In addition, the Pass Through Trustee shall have received executed
counterparts or conformed copies of the following documents:

                  (1) each of the Pass Through Trust Agreements;

                  (2) the Intercreditor Agreement; and

                  (3) the Liquidity Facility for each of the Pass Through
            Trusts.

            (vi) A Uniform Commercial Code financing statement or statements
      covering all the security interests created by or pursuant to the Granting
      Clause of the Trust Indenture that are not covered by the recording system
      established by the Federal Aviation Act, shall have been executed and
      delivered by the Owner, and such financing statement or statements shall
      have been duly filed in all places necessary or advisable, and any
      additional Uniform Commercial Code financing statements deemed advisable
      by the Pass Through Trustee shall have been executed and delivered by the
      Owner and duly filed.

            (vii) The Pass Through Trustee shall have received the following:


                                      -4-
<PAGE>

                  (A)(1) an incumbency certificate of the Owner and the
            Guarantor (as the case may be) as to the person or persons
            authorized to execute and deliver this Agreement, the Pass Through
            Trust Agreements, the Guarantee and any other documents to be
            executed on behalf of the Owner or the Guarantor (as the case may
            be) in connection with the transactions contemplated hereby and the
            signatures of such person or persons;

                  (2) a copy of the resolutions of the board of directors of the
            Owner and the Guarantor or the executive committee thereof,
            certified by the Secretary or an Assistant Secretary of the Owner
            and the Guarantor (as the case may be), duly authorizing the
            transactions contemplated hereby and the execution and delivery of
            each of the documents required to be executed and delivered on
            behalf of the Owner or the Guarantor (as the case may be) in
            connection with the transactions contemplated hereby; and

                  (3) a copy of the certificate of incorporation of the Owner
            and the Guarantor, certified by the Secretary of State of the State
            of Minnesota in the case of the Owner and certified by the Secretary
            of State of the State of Delaware in the case of the Guarantor, a
            copy of the by-laws of the Owner and the Guarantor, certified by the
            Secretary or Assistant Secretary of the Owner and the Guarantor (as
            the case may be), and a certificate or other evidence from the
            Secretary of State of the State of Minnesota in the case of the
            Owner and from the Secretary of State of the State of Delaware in
            the case of the Guarantor, dated as of a date reasonably near the
            Closing Date, as to the due incorporation and good standing of the
            Owner or the Guarantor (as the case may be) in such state.

                  (B)(1) an incumbency certificate of the Indenture Trustee as
            to the person or persons authorized to execute and deliver this
            Agreement, the Trust Indenture and any other documents to be
            executed on behalf of the Indenture Trustee in connection with the
            transactions contemplated hereby and the signatures of such person
            or persons;

                  (2) a copy of the resolutions of the board of directors of the
            Indenture Trustee, certified by the Secretary or an Assistant
            Secretary of the Indenture Trustee, duly authorizing the
            transactions contemplated hereby and the execution and delivery of
            each of the documents required to be executed and delivered on
            behalf of the Indenture Trustee in connection with the transactions
            contemplated hereby;

                  (3) a copy of the articles of association and by-laws of the
            Indenture Trustee, each certified by the Secretary or an Assistant
            Secretary of the Indenture Trustee; and

                  (4) a certificate signed by an authorized officer of the
            Indenture Trustee, dated the Closing Date, certifying that the
            representations and warranties contained herein of the Indenture
            Trustee are correct as though made on and as of the Closing Date,
            except to the extent that such representations and warranties


                                      -5-
<PAGE>

            relate solely to an earlier date (in which case such representations
            and warranties are correct on and as of such earlier date).

            (viii) All appropriate action required to have been taken prior to
      the Closing Date in connection with the transactions contemplated by this
      Agreement shall have been taken by the Federal Aviation Administration, or
      any governmental or political agency, subdivision or instrumentality of
      the United States, and all orders, permits, waivers, authorizations,
      exemptions and approvals of such entities required to be in effect on the
      Closing Date in connection with the transactions contemplated by this
      Agreement shall have been issued, and all such orders, permits, waivers,
      authorizations, exemptions and approvals shall be in full force and effect
      on the Closing Date.

            (ix) On the Closing Date the Pass Through Trustee shall have
      received a certificate signed by an authorized officer of the Owner (and
      with respect to the matters set forth in clause (4) below, the Guarantor)
      to the effect that:

                  (1) the Aircraft has been duly certified by the Federal
            Aviation Administration as to type and has a current certificate of
            airworthiness, and the Owner has good title to the Aircraft free and
            clear of Liens other than Permitted Liens;

                  (2) the Trust Indenture and the Trust Indenture Supplement
            covering the Aircraft shall have been duly filed for recordation (or
            shall be in the process of being so duly filed for recordation) with
            the Federal Aviation Administration;

                  (3) application for registration of the Aircraft in the name
            of the Owner has been duly made with the Federal Aviation
            Administration; and

                  (4) the representations and warranties contained herein of the
            Owner and the Guarantor are correct as though made on and as of the
            Closing Date, except to the extent that such representations and
            warranties (other than those contained in clause (F) of Section
            7(a)(iv)) relate solely to an earlier date (in which case such
            representations and warranties were correct on and as of such
            earlier date).

            (x) The Owner and the Guarantor shall have entered into the
      Underwriting Agreement and each of the Pass Through Trust Agreements, the
      Certificates shall have been issued and sold pursuant to the Underwriting
      Agreement and the Pass Through Trust Agreements.

            (xi) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee and the Indenture Trustee, and reasonably
      satisfactory as to scope and substance to the Pass Through Trustee, an
      opinion substantially in the form of Exhibit B-1 hereto from Simpson
      Thacher & Bartlett, special counsel for the Owner and the Guarantor, an
      opinion substantially in the form of Exhibit B-2 hereto from Cadwalader,
      Wickersham & Taft, special counsel for the Owner and the Guarantor, and an
      opinion substantially in the form of Exhibit B-3 hereto from the Owner's
      legal department.


                                      -6-
<PAGE>

            (xii) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee, the Indenture Trustee, the Guarantor and the Owner
      and reasonably satisfactory as to scope and substance to the Pass Through
      Trustee, the Guarantor and the Owner, an opinion substantially in the form
      of Exhibit C hereto from counsel to the Supplier and the Manufacturer.

            (xiii) [Intentionally Omitted].

            (xiv) [Intentionally Omitted].

            (xv) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee, the Indenture Trustee, the Guarantor and the Owner,
      and reasonably satisfactory as to scope and substance to the Pass Through
      Trustee, the Guarantor and the Owner, an opinion substantially in the form
      of Exhibit F hereto from Crowe & Dunlevy, P.C.

            (xvi) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee, the Guarantor and the Owner, and reasonably
      satisfactory as to scope and substance to the Pass Through Trustee, the
      Guarantor and the Owner, an opinion substantially in the form of Exhibit G
      hereto from Bingham Dana LLP, special counsel for the Indenture Trustee.

            (xvii) [Intentionally Omitted].

            (xviii) The Pass Through Trustee shall have received an independent
      insurance broker's report, in form and substance satisfactory to the Pass
      Through Trustee, as to the due compliance with the terms of Section 7.04
      of the Trust Indenture relating to insurance with respect to the Aircraft.

            (xix) [Intentionally Omitted].

            (xx) No action or proceeding shall have been instituted nor shall
      governmental action be threatened before any court or governmental agency,
      nor shall any order, judgment or decree have been issued or proposed to be
      issued by any court or governmental agency at the time of the Closing Date
      to set aside, restrain, enjoin or prevent the completion and consummation
      of this Agreement or the transactions contemplated hereby.

            (xxi) [Intentionally Omitted].

            (xxii) [Intentionally Omitted].

            (xxiii) The Pass Through Trustee shall have received a favorable
      opinion substantially in the form of Exhibit I hereto addressed to the
      Pass Through Trustee, and reasonably satisfactory as to scope and
      substance to the Pass Through Trustee, from Cadwalader, Wickersham & Taft,
      special counsel for the Owner, which opinion shall state (with customary
      assumptions and qualifications) that the Indenture Trustee would be
      entitled to the benefits of 11 U.S.C. ss.1110 with respect to the
      Aircraft.


                                      -7-
<PAGE>

            (xxiv) [Intentionally Omitted].

            (xxv) The Pass Through Trustee shall have received, addressed to the
      Pass Through Trustee, the Indenture Trustee, the Guarantor and the Owner,
      and reasonably satisfactory as to scope and substance, to the Pass Through
      Trustee, the Guarantor and the Owner, an opinion substantially in the form
      of Exhibit J-2 hereto from Bingham Dana LLP, special counsel to the
      Subordination Agent.

            Promptly upon the recording of the Trust Indenture and the Trust
Indenture Supplement covering the Aircraft pursuant to the Federal Aviation Act,
the Owner will cause Crowe & Dunlevy, P.C., special counsel in Oklahoma City,
Oklahoma, to deliver to the Pass Through Trustee, the Indenture Trustee and the
Owner an opinion as to the due and valid registration of the Aircraft in the
name of the Owner, the due recording of the Trust Indenture and such Trust
Indenture Supplement and the lack of filing of any intervening documents with
respect to the Aircraft.

            (b) Conditions Precedent to the Obligations of the Owner and the
Guarantor. It is agreed that the obligations of the Owner and the Guarantor to
enter into the other Operative Documents are all subject to the fulfillment to
the satisfaction of the Owner and the Guarantor prior to or on the Closing Date
of the following conditions precedent:

            (i) All appropriate action required to have been taken on or prior
      to the Closing Date in connection with the transactions contemplated by
      this Agreement shall have been taken by the Federal Aviation
      Administration, or any governmental or political agency, subdivision or
      instrumentality of the United States, and all orders, permits, waivers,
      exemptions, authorizations and approvals of such entities required to be
      in effect on the Closing Date in connection with the transactions
      contemplated by this Agreement shall have been issued, and all such
      orders, permits, waivers, exemptions, authorizations and approvals shall
      be in full force and effect on the Closing Date.

            (ii) The condition specified in Section 4(a)(ii) hereof shall have
      been satisfied.

            (iii) Those documents described in Section 4(a)(v) shall have been
      duly authorized, executed and delivered by the respective party or parties
      thereto (other than the Owner and the Guarantor) in the manner specified
      in Section 4(a)(v), shall each be satisfactory in form and substance to
      the Owner and the Guarantor, shall be in full force and effect on the
      Closing Date, and an executed counterpart of each thereof (other than the
      Secured Certificates) shall have been delivered to the Owner or its
      special counsel and the Guarantor or its special counsel.

            (iv) The Owner and the Guarantor shall have received (A) each
      certificate referred to in Section 4(a)(vii) (other than the certificate
      referred to in clause (A) thereof), (B) a certificate signed by an
      authorized officer of the Pass Through Trustee, dated the Closing Date,
      certifying that the representations and warranties contained herein of the
      Pass Through Trustee are correct as though made on and as of the Closing
      Date, except to the extent that such representations and warranties relate
      solely to an earlier date (in which case such representations and
      warranties are correct on and as of such earlier date),


                                      -8-
<PAGE>

      and (C)(1) an incumbency certificate of the Pass Through Trustee as to the
      person or persons authorized to execute and deliver this Agreement and any
      other documents to be executed on behalf of the Pass Through Trustee in
      connection with the transactions contemplated hereby and the signatures of
      such person or persons; (2) a copy of the articles of association and
      by-laws of the Pass Through Trustee, each certified by the Secretary of an
      Assistant Secretary of the Pass Through Trustee; and (3) such other
      documents and evidence with respect to the Pass Through Trustee as the
      Owner or its special counsel and the Guarantor or its special counsel may
      reasonably request in order to establish the due consummation of the
      transactions contemplated by this Agreement, the taking of all necessary
      action in connection therewith and compliance with the conditions herein
      set forth.

            (v) The Owner and the Guarantor shall have received (A) an opinion
      substantially in the form of Exhibit J-1 hereto addressed to the Guarantor
      and the Owner of Bingham Dana LLP, special counsel for the Pass Through
      Trustee, and reasonably satisfactory as to scope and substance to the
      Guarantor and the Owner, and (B) the opinions set forth in Sections
      4(a)(xii), 4(a)(xv), 4(a)(xvi) and 4(a)(xxv) in each case addressed to the
      Owner and the Guarantor and dated the Closing Date and in each case in
      scope and substance reasonably satisfactory to the Owner and its special
      counsel and the Guarantor and its special counsel.

            (vi) No action or proceeding shall have been instituted nor shall
      governmental action be threatened before any court or governmental agency,
      nor shall any order, judgment or decree have been issued or proposed to be
      issued by any court or governmental agency at the time of the Closing Date
      to set aside, restrain, enjoin or prevent the completion and consummation
      of this Agreement or the transactions contemplated hereby.

            (vii) No change shall have occurred after the date of the execution
      and delivery of this Agreement in applicable law or regulations or
      guidelines or interpretations by appropriate regulatory authorities which
      would make it a violation of law or regulations or guidelines for the
      Owner or the Guarantor to enter into any transaction contemplated by the
      Operative Documents.

            (viii) [Intentionally Omitted].

            (ix) The Owner shall have been paid by the Pass Through Trustee for
      each Pass Through Trust the aggregate purchase price set forth on Schedule
      II opposite the name of such Pass Through Trust.

            SECTION 5. [Intentionally Omitted].

            SECTION 6. Extent of Interest of Certificate Holders. No Certificate
Holder (as defined in the Trust Indenture) shall have any further interest in,
or other right with respect to, the mortgage and security interests created by
the Trust Indenture when and if the principal of and interest on all Secured
Certificates held by such holder and all other sums payable to such


                                      -9-
<PAGE>

holder hereunder, under the Trust Indenture and under such Secured Certificates
shall have been paid in full.

            SECTION 7. Representations and Warranties of the Owner and the
Guarantor; Indemnities. (a) Representations and Warranties. The Owner and the
Guarantor represent and warrant to the Pass Through Trustee, the Indenture
Trustee, the Liquidity Provider and the Subordination Agent that as of the
Closing Date:

            (i) each of the Owner and the Guarantor is a corporation duly
      organized, validly existing and in good standing under the laws of the
      state of its incorporation, has the corporate power and authority to own
      or hold under lease its properties, has, or had on the respective dates of
      execution thereof, the corporate power and authority to enter into and
      perform its obligations under (i) in the case of the Owner, the Owner
      Documents, the Pass Through Trust Agreements, the Underwriting Agreement
      and the other Operative Documents to which it is a party and (ii) in the
      case of the Guarantor, this Agreement, the Pass Through Trust Agreements,
      the Underwriting Agreement and the other Operative Documents to which it
      is a party, and is duly qualified to do business as a foreign corporation
      in each state in which its operations or the nature of its business
      requires other than failures to so qualify which would not have a material
      adverse effect on the condition (financial or otherwise), consolidated
      business or properties of it and its subsidiaries considered as one
      enterprise;

            (ii) The Owner is a Certificated Air Carrier, and its chief
      executive office (as such term is used in Article 9 of the Uniform
      Commercial Code in effect in the State of Minnesota) is located at Eagan,
      Minnesota;

            (iii) the execution and delivery by the Owner or the Guarantor (as
      the case may be) of the Owner Documents, the Pass Through Trust
      Agreements, the Underwriting Agreement and each other Operative Document
      to which the Owner or the Guarantor (as the case may be) is a party, and
      the performance of the obligations of the Owner or the Guarantor (as the
      case may be) under the Owner Documents, the Pass Through Trust Agreements,
      the Underwriting Agreement and each other Operative Document to which the
      Owner or the Guarantor (as the case may be) is a party, have been duly
      authorized by all necessary corporate action on the part of the Owner or
      the Guarantor, do not require any stockholder approval, or approval or
      consent of any trustee or holder of any material indebtedness or material
      obligations of the Owner or the Guarantor, except such as have been duly
      obtained and are in full force and effect, and do not contravene any law,
      governmental rule, regulation or order binding on the Owner or the
      Guarantor (as the case may be) or the certificate of incorporation or
      by-laws of the Owner or the Guarantor (as the case may be), or contravene
      the provisions of, or constitute a default under, or result in the
      creation of any Lien (other than Permitted Liens) upon the property of the
      Owner or the Guarantor (as the case may be) under, any indenture,
      mortgage, contract or other agreement to which the Owner or the Guarantor
      (as the case may be) is a party or by which it may be bound or affected
      which contravention, default or Lien, individually or in the aggregate,
      would be reasonably likely to have a material adverse effect on the
      condition (financial or otherwise), business or properties of the
      Guarantor and its subsidiaries considered as one enterprise;


                                      -10-
<PAGE>

            (iv) neither the execution and delivery by the Owner or the
      Guarantor (as the case may be) of the Owner Documents, the Pass Through
      Trust Agreements, the Underwriting Agreement or any other Operative
      Document to which the Owner or the Guarantor (as the case may be) is a
      party, nor the performance of the obligations of the Owner or the
      Guarantor (as the case may be) under the Owner Documents, the Pass Through
      Trust Agreements, the Underwriting Agreement or the other Operative
      Documents to which the Owner or the Guarantor (as the case may be) is a
      party, requires the consent or approval of, the giving of notice to, the
      registration with, or the taking of any other action in respect of, the
      Department of Transportation, the FAA, or any other federal, state or
      foreign governmental authority having jurisdiction over the Owner or the
      Guarantor, other than (A) the registration of the Certificates under the
      Securities Act of 1933, as amended, and under the securities laws of any
      state in which the Certificates may be offered for sale if the laws of
      such state require such action, (B) the qualification of the Pass Through
      Trust Agreements under the Trust Indenture Act of 1939, as amended,
      pursuant to an order of the Securities and Exchange Commission, (C) the
      orders, permits, waivers, exemptions, authorizations and approvals of the
      regulatory authorities having jurisdiction over the operation of the
      Aircraft by the Owner or any Lessee required to be obtained on or prior to
      the Closing Date, which orders, permits, waivers, exemptions,
      authorizations and approvals have been duly obtained and are, or on the
      Closing Date will be, in full force and effect (other than a flying time
      wire, all steps to obtain the issuance of which will have been, on the
      Closing Date, taken or caused to be taken by the Owner), (D) the
      registration of the Aircraft referred to in Section 4(a)(ix)(3), (E) the
      registrations and filings referred to in Section 7(a)(vi), and (F)
      authorizations, consents, approvals, actions, notices and filings required
      to be obtained, taken, given or made either only after the date hereof or
      the failure of which to obtain, take, give or make would not be reasonably
      likely to have a material adverse effect on the condition (financial or
      otherwise), business or properties of the Guarantor and its subsidiaries
      considered as one enterprise;

            (v) this Agreement, each of the other the Owner Documents, the Pass
      Through Trust Agreements and the Guarantee constitute the legal, valid and
      binding obligations of the Owner or the Guarantor (as the case may be)
      enforceable against the Owner or the Guarantor (as the case may be) in
      accordance with their respective terms, except as the same may be limited
      by applicable bankruptcy, insolvency, fraudulent conveyance,
      reorganization, moratorium or similar laws affecting the rights of
      creditors or lessors generally and by general principles of equity,
      whether considered in a proceeding at law or in equity, and except, in the
      case of the Trust Indenture, as limited by applicable laws which may
      affect the remedies provided in the Trust Indenture, which laws, however,
      do not make the remedies provided in the Trust Indenture inadequate for
      practical realization of the benefits intended to be afforded thereby;

            (vi) except for (A) the filing for recording pursuant to the Federal
      Aviation Act of a bill of sale on AC form 8050-2 (or such other form as
      may be approved by the FAA) relating to the Aircraft from the Supplier to
      the Owner, (B) the registration of the Aircraft pursuant to the Federal
      Aviation Act, (C) the filing for recording pursuant to the Federal
      Aviation Act of [(x) the termination of the Mortgage and (y)] the Trust
      Indenture and the Trust Indenture Supplement covering the Aircraft
      attached thereto and made a part


                                      -11-
<PAGE>

      thereof, (D) the filing of financing statements (and continuation
      statements at periodic intervals) with respect to the security interests
      created by such documents under the Uniform Commercial Code of Minnesota
      and such other states as may be specified in the opinions furnished
      pursuant to Section 4(a)(xi) hereof, and (E) the taking of possession by
      the Indenture Trustee of the original counterparts of the Trust Indenture
      and the Trust Indenture Supplement covering the Aircraft, no further
      filing or recording of any document (including any financing statement in
      respect thereof under Article 9 of the Uniform Commercial Code of any
      applicable jurisdiction) is necessary under the laws of the United States
      of America or any State thereof in order to perfect the security interest
      in favor of the Indenture Trustee in the Aircraft as against the Owner and
      any third parties in any applicable jurisdiction in the United States;

            (vii) neither the Owner, the Guarantor nor any of their affiliates
      has directly or indirectly offered the Certificates for sale to any Person
      other than in a manner permitted by the Securities Act of 1933, as
      amended, and by the rules and regulations thereunder;

            (viii) neither the Owner nor the Guarantor is an "investment
      company" within the meaning of the Investment Company Act of 1940, as
      amended;

            (ix) no event has occurred and is continuing which constitutes an
      Event of Default or would constitute an Event of Default but for the
      requirement that notice be given or time lapse or both;

            (x) no event has occurred and is continuing which constitutes an
      Event of Loss or would constitute an Event of Loss with the lapse of time;

            (xi) the Owner is solvent and has no intention or belief that it is
      about to incur debts beyond its ability to pay as they mature;

            (xii) none of the proceeds from the issuance of the Secured
      Certificates will be used directly or indirectly by the Owner to purchase
      or carry any "margin security" as such term is defined in Regulation U of
      the Board of Governors of the Federal Reserve System; and

            (xiii) On the Closing Date, all sales or use tax then due and for
      which the Owner is responsible pursuant to Section 7(b)(i) hereof shall
      have been paid, other than such taxes which are being contested by the
      Owner in good faith and by appropriate proceedings so long as such
      proceedings do not involve any material risk of the sale, forfeiture or
      loss of the Aircraft.

            (b) General Tax Indemnity. Exhibit K, which is a complete statement
of the provisions of Section 7(b), is incorporated herein in its entirety as if
fully set forth herein.

            (c) General Indemnity. Exhibit L, which is a complete statement of
the provisions of Section 7(c), is incorporated herein in its entirety as if
fully set forth herein.

            (d) Income Tax. For purposes of this Section 7, the term "Income
Tax" means any Tax based on or measured by gross or net income or receipts
(other than sales, use,


                                      -12-
<PAGE>

license or property Taxes or Taxes in the nature thereof) (including, without
limitation, capital gains taxes, minimum taxes, income taxes collected by
withholding and taxes on tax preference items), and Taxes which are capital,
doing business, excess profits or net worth taxes and interest, additions to
tax, penalties, or other charges in respect thereof.

            SECTION 8. Representations, Warranties and Covenants.

            (a) [Intentionally Omitted].

            (b) [Intentionally Omitted].

            (c) [Intentionally Omitted].

            (d) [Intentionally Omitted].

            (e) Each Loan Participant represents and warrants that neither it
nor anyone acting in its behalf has offered any Secured Certificates for sale
to, or solicited any offer to buy any Secured Certificate from, any Person other
than in a manner in compliance with, and which does not require registration
under, the Securities Act of 1933, as amended, or the rules and regulations
thereunder.

            (f) The Indenture Trustee agrees that the Owner may elect to effect
a change in registration of the Aircraft, at the Owner's cost and expense, so
long as (a) the country of registry of the Aircraft is a country listed on
Exhibit A hereto and (b) the following conditions are met: (i) unless the
country of registry is Taiwan, the United States maintains normal diplomatic
relations with the country of registry of the Aircraft, and if the country of
registry is Taiwan, the United States maintains diplomatic relations at least as
good as those in effect on the Closing Date; and (ii) the Indenture Trustee
shall have received a favorable opinion (subject to customary exceptions)
addressed to the Indenture Trustee, from counsel of recognized reputation
qualified in the laws of the relevant jurisdiction to the effect that:

            (A) the Owner's ownership interest in the Aircraft shall be
      recognized under the laws of such jurisdiction, (B) the obligations of the
      Owner, and the rights and remedies of the Indenture Trustee, under the
      Trust Indenture shall remain valid, binding and (subject to customary
      bankruptcy and equitable remedies exceptions and to other exceptions
      customary in foreign opinions generally) enforceable under the laws of
      such jurisdiction (or the laws of the jurisdiction to which the laws of
      such jurisdiction would refer as the applicable governing law), (C) after
      giving effect to such change in registration, the Lien of the Trust
      Indenture on the Owner's right, title and interest in and to the Aircraft
      shall continue as a valid and duly perfected first priority security
      interest and all filing, recording or other action necessary to protect
      the same shall have been accomplished (or, if such opinion cannot be given
      at the time of such proposed change in registration because such change in
      registration is not yet effective, (1) the opinion shall detail what
      filing, recording or other action is necessary and (2) the Indenture
      Trustee shall have received a certificate from the Owner that all possible
      preparations to accomplish such filing, recording and other action shall
      have been done, and such filing, recording and other action shall be
      accomplished and a supplemental opinion to that effect shall be delivered
      to the Indenture Trustee on or prior to the effective date of such


                                      -13-
<PAGE>

      change in registration), (D) it is not necessary, solely as a consequence
      of such change in registration and without giving effect to any other
      activity of the Indenture Trustee (or any Affiliate thereof) for the
      Indenture Trustee to qualify to do business in such jurisdiction, (E)
      there is no tort liability of the owner of an aircraft not in possession
      thereof under the laws of such jurisdiction (it being agreed that, in the
      event such latter opinion cannot be given in a form satisfactory to the
      Indenture Trustee, such opinion shall be waived if insurance reasonably
      satisfactory to the Indenture Trustee is provided to cover such risk), and
      (F) (unless the Owner shall have agreed to provide insurance covering the
      risk of requisition of use of such Aircraft by the government of such
      jurisdiction so long as such Aircraft is registered under the laws of such
      jurisdiction) the laws of such jurisdiction require fair compensation by
      the government of such jurisdiction payable in currency freely convertible
      into Dollars for the loss of use of such Aircraft in the event of the
      requisition by such government of such use.

In addition, as a condition precedent to any such change in registration, the
Owner shall furnish to the Indenture Trustee an Officer's Certificate to the
effect that the insurance required by Section 7.04 of the Trust Indenture shall
be in full force and effect at the time of such change in registration after
giving effect to such change in registration and that the new country of
registry imposes aircraft maintenance standards not materially different from
those of the United States, France, Germany, Japan, the Netherlands or the
United Kingdom. The Owner shall pay all costs, expenses, fees, recording and
registration taxes, including the reasonable fees and expenses of counsel to the
Indenture Trustee, and other charges in connection with any such change in
registration.

            (g) Each Loan Participant and each of the Indenture Trustee, the
Subordination Agent and each Pass Through Trustee covenants and agrees that, so
long as no Event of Default shall have occurred and be continuing and the Owner
has not been duly declared in default and, notwithstanding default by any Loan
Participant, the Indenture Trustee, any Pass Through Trustee or the
Subordination Agent, that such Person shall not (and shall not permit any
Affiliate or other Person claiming by, through or under it to) interfere with
the Owner's continued possession, use and operation of, and quiet enjoyment of,
the Aircraft.

            (h) [Intentionally Omitted].

            (i) State Street Bank and Trust Company, in its individual capacity,
covenants and agrees that it shall not cause or permit to exist any Lien,
arising as a result of (A) claims against the Indenture Trustee not related to
its interest in the Aircraft or the administration of the Collateral pursuant to
the Trust Indenture, (B) acts of the Indenture Trustee not permitted by, or
failure of the Indenture Trustee to take any action required by, the Operative
Documents to the extent such acts arise or such failure arises from or
constitutes gross negligence or willful misconduct, (C) claims against the
Indenture Trustee relating to Taxes or Expenses which are excluded from the
indemnification provided by Section 7 pursuant to said Section 7, or (D) claims
against the Indenture Trustee arising out of the transfer by the Indenture
Trustee of all or any portion of its interest in the Aircraft, the Collateral or
the Operative Documents other than a transfer of the Aircraft pursuant to
Article IV of the Trust Indenture while an Event of Default is continuing and
prior to the time that the Indenture Trustee has received all amounts due
pursuant to the Trust Indenture.


                                      -14-
<PAGE>

            (j) [Intentionally Omitted].

            (k) Each Loan Participant represents and warrants that the Secured
Certificate to be issued to it pursuant to the Trust Indenture is being acquired
by it for investment and not with a view to resale or distribution (it being
understood that such Loan Participant may pledge or assign as security its
interest in each Secured Certificate issued to it), provided that the
disposition of its property shall at all times be and remain within its control,
except that the Loan Participants may sell, transfer or otherwise dispose of any
Secured Certificate or any portion thereof, or grant participations therein, in
a manner which in itself does not require registration under the Securities Act
of 1933, as amended.

            (l) The Indenture Trustee, and by acceptance of the Secured
Certificates the Certificate Holders, hereby (i) make (and hereby agree to
make), with respect to the Collateral, the election provided for in Section
1111(b)(2) of Title 11 of the United States Code.

            (m) State Street Bank and Trust Company represents, warrants and
covenants, in its individual capacity, to the Owner, the Guarantor, the Pass
Through Trustee, the Subordination Agent and the Liquidity Provider as follows:

            (i) the Indenture Trustee is a Massachusetts trust company duly
      incorporated, validly existing and in good standing under the laws of
      Massachusetts, is a Citizen of the United States (without making use of
      any voting trust, voting powers agreement or similar arrangement), will
      notify promptly all parties to this Agreement if in its reasonable opinion
      its status as a Citizen of the United States (without making use of any
      voting trust, voting powers agreement or similar arrangement) is likely to
      change and will resign as Indenture Trustee as provided in Section 9.01 of
      the Trust Indenture promptly after it obtains actual knowledge that it has
      ceased to be such a Citizen of the United States (without making use of a
      voting trust, voting powers agreement or similar arrangement), and has the
      full corporate power, authority and legal right under the laws of the
      Commonwealth of Massachusetts and the United States pertaining to its
      banking, trust and fiduciary powers to execute and deliver each of this
      Agreement, the Trust Indenture and each other Operative Document to which
      it is a party and to carry out its obligations under this Agreement, the
      Trust Indenture, each other Operative Document to which it is a party and
      to authenticate the Secured Certificates;

            (ii) the execution and delivery by the Indenture Trustee of the
      Indenture Trustee Documents and the authentication of the Secured
      Certificates and the performance by the Indenture Trustee of its
      obligations under the Indenture Trustee Documents have been duly
      authorized by the Indenture Trustee and will not violate its articles of
      association or by-laws or the provisions of any indenture, mortgage,
      contract or other agreement to which it is a party or by which it is
      bound;

            (iii) this Agreement and each of the other Indenture Trustee
      Documents constitute the legal, valid and binding obligations of the
      Indenture Trustee enforceable against it in accordance with their
      respective terms, except as the same may be limited by applicable
      bankruptcy, insolvency, reorganization, moratorium or similar laws
      affecting


                                      -15-
<PAGE>

      the rights of creditors generally and by general principles of equity,
      whether considered in a proceeding at law or in equity;

            (iv) there are no pending or, to its knowledge, threatened actions
      or proceedings against the Indenture Trustee, either in its individual
      capacity or as Indenture Trustee, before any court or administrative
      agency which, if determined adversely to it, would materially adversely
      affect the ability of the Indenture Trustee, in its individual capacity or
      as Indenture Trustee as the case may be, to perform its obligations under
      the Operative Documents to which it is a party; and

            (v) there are no Indenture Trustee's Liens on the Aircraft or any
      other portion of the Collateral.

            (n) [Intentionally Omitted].

            (o) [Intentionally Omitted].

            (p) State Street Bank and Trust Company, in its individual capacity,
agrees for the benefit of the Owner to comply with the terms of the Trust
Indenture which it is required to comply with in its individual capacity.

            (q) Each Loan Participant agrees that it will not transfer any
Secured Certificate (or any part thereof) to any entity unless such entity makes
(or is deemed to have made) a representation and warranty as of the date of
transfer that either no part of the funds to be used by it for the purchase and
holding of such Secured Certificate (or any part thereof) constitutes assets of
any "employee benefit plan" or that such purchase and holding will not result in
a non-exempt prohibited transaction (under Section 4975 of the Code and Section
406 of ERISA).

            (r) Each Loan Participant and the Indenture Trustee agrees for the
benefit of the Manufacturer and the Owner that it will not disclose or suffer to
be disclosed the terms of the Purchase Agreement to any third party except (A)
as may be required by any applicable statute, court or administrative order or
decree or governmental ruling or regulation or to any regulatory authorities
having official jurisdiction over them, (B) in connection with the financing of
the Aircraft and the other transactions contemplated by the Operative Documents
(including any transfer of Secured Certificates (including by way of
participation or assignment of an interest, provided such participant or
assignee agrees to hold such terms confidential to the same extent as herein
provided) and any exercise of remedies under the Trust Indenture), (C) with the
prior written consent of the Manufacturer and the Owner, or (D) to the Indenture
Trustee's and each Loan Participant's counsel or special counsel, independent
insurance brokers or other agents who agree to hold such information
confidential.

            (s) [Intentionally Omitted].

            (t) Each Loan Participant covenants and agrees that it shall not
cause or permit to exist a Loan Participant Lien attributable to it with respect
to the Aircraft or any other portion of the Collateral. Each Loan Participant
agrees that it will promptly, at its own expense, take such other action as may
be necessary duly to discharge such Loan Participant Lien


                                      -16-
<PAGE>

attributable to it. Each Loan Participant agrees to make restitution to the
Owner for any damages or expenses of the Owner resulting from such Loan
Participant Lien attributable to it.

            (u) State Street Bank and Trust Company, in its individual capacity,
covenants and agrees that it shall not cause or permit to exist any Indenture
Trustee's Liens with respect to the Collateral. State Street Bank and Trust
Company, in its individual capacity, agrees that it will promptly, at its own
expense, take such action as may be necessary duly to discharge such Indenture
Trustee's Liens. State Street Bank and Trust Company, in its individual
capacity, agrees to make restitution to the Owner for any actual diminution of
the assets of the Collateral resulting from such Indenture Trustee's Liens.

            (v) [Intentionally Omitted].

            (w) [Intentionally Omitted].

            (x) [Intentionally Omitted].

            (y) (A) The Owner will not consolidate with or merge into any other
corporation or convey, transfer or lease substantially all of its assets as an
entirety to any Person unless:

            (i) the corporation formed by such consolidation or into which the
      Owner is merged or the Person which acquires by conveyance, transfer or
      lease substantially all of the assets of the Owner as an entirety shall be
      a Certificated Air Carrier;

            (ii) the corporation formed by such consolidation or into which the
      Owner is merged or the Person which acquires by conveyance, transfer or
      lease substantially all of the assets of the Owner as an entirety shall
      execute and deliver to the Indenture Trustee an agreement in form and
      substance reasonably satisfactory to the Indenture Trustee containing an
      assumption by such successor corporation or Person of the due and punctual
      performance and observance of each covenant and condition of this
      Agreement, the Trust Indenture and the Secured Certificates to be
      performed or observed by the Owner;

            (iii) immediately after giving effect to such transaction, no
      Default or Event of Default under the Trust Indenture shall have occurred
      and be continuing; and

            (iv) The Owner shall have delivered to the Indenture Trustee a
      certificate signed by the President, any Executive Vice President, any
      Senior Vice President, the Treasurer or any Vice President and by the
      Secretary or an Assistant Secretary of the Owner, and an opinion of
      counsel reasonably satisfactory to the Indenture Trustee, each stating
      that such consolidation, merger, conveyance, transfer or lease and the
      assumption agreement mentioned in clause (ii) above comply with this
      subparagraph (A) of Section 8(y) and that all conditions precedent herein
      provided for relating to such transaction have been complied with.

            Upon any such consolidation or merger or any such conveyance,
transfer or lease of substantially all of the assets of the Owner as an entirety
in accordance with this subparagraph


                                      -17-
<PAGE>

(A) of Section 8(y), the successor corporation or Person formed by such
consolidation or into which the Owner is merged or to which such conveyance,
transfer or lease is made shall succeed to, and be substituted for, and may
exercise every right and power of, the Owner under this Agreement with the same
effect as if such successor corporation or Person had been named as the Owner
herein. No such conveyance, transfer or lease of substantially all of the assets
of the Owner as an entirety shall have the effect of releasing the Owner or any
successor corporation or Person which shall theretofore have become such in the
manner prescribed in this subparagraph (A) of Section 8(y) from its liability in
respect of any Operative Document to which it is a party.

                  (B) The Owner shall at all times maintain its corporate
existence except as permitted by subparagraph (A) of this Section 8(y).

            (z) The Owner, at its expense, will take, or cause to be taken, such
action with respect to the recording, filing, re-recording and refiling of the
Trust Indenture, the Trust Indenture Supplement and any financing statements or
other instruments as are necessary to maintain, so long as the Trust Indenture
is in effect, the perfection of the security interests created by the Trust
Indenture or will furnish to the Indenture Trustee timely notice of the
necessity of such action, together with such instruments, in execution form, and
such other information as may be required to enable it to take such action. The
Owner will notify the Indenture Trustee of any change in the location of its
chief executive office (as such term is used in Article 9 of the Uniform
Commercial Code) promptly after making such change or in any event within the
period of time necessary under applicable law to prevent the lapse of perfection
(absent refiling) of financing statements filed under the Operative Documents.

            (aa) [Intentionally Omitted].

            (bb) [Intentionally Omitted].

            (cc) Each Loan Participant hereby represents, warrants and agrees
that it shall not transfer any interest in any Secured Certificate unless and
until the transferee agrees in writing (copies of which shall be provided by the
Indenture Trustee to the Owner) to make the representations contemplated to be
made by a Loan Participant in this Agreement and to be bound by the terms of
this Agreement and the Trust Indenture (including, without limitation, the
representations and covenants set forth in Sections 8(e), 8(k), 8(l), 8(q), and
8(t) hereof and this Section 8(cc) and Section 2.03 of the Trust Indenture).

            (dd) The Pass Through Trustee represents and warrants to the Owner,
the Guarantor, the Indenture Trustee, the Subordination Agent and the Liquidity
Provider, in its capacity as such and in its individual capacity, as follows:

            (i) the Pass Through Trustee is a duly organized national banking
      association, validly existing and in good standing with the Comptroller of
      the Currency under the laws of the United States, has the full power,
      authority and legal right under the laws of the United States pertaining
      to its banking, trust and fiduciary powers to execute and deliver each of
      the Pass Through Trust Agreements, the Intercreditor Agreement and this
      Agreement and to perform its obligations under the Pass Through Trust
      Agreements, the


                                      -18-
<PAGE>

      Intercreditor Agreement and this Agreement, and has its chief executive
      office located in Hartford, Connecticut;

            (ii) this Agreement, each of the Pass Through Trust Agreements and
      the Intercreditor Agreement have been duly authorized, executed and
      delivered by the Pass Through Trustee; this Agreement, each of the Pass
      Through Trust Agreements and the Intercreditor Agreement constitute the
      legal, valid and binding obligations of the Pass Through Trustee
      enforceable against it in accordance with their respective terms, except
      as the same may be limited by applicable bankruptcy, insolvency,
      reorganization, moratorium or similar laws affecting the rights of
      creditors generally and by general principles of equity, whether
      considered in a proceeding at law or in equity;

            (iii) none of the execution, delivery and performance by the Pass
      Through Trustee of any of the Pass Through Trust Agreements, the
      Intercreditor Agreement or this Agreement, the purchase by the Pass
      Through Trustee of the Secured Certificates pursuant to this Agreement, or
      the issuance of the Certificates pursuant to the Pass Through Trust
      Agreements, contravenes any law, rule or regulation of the State of
      Connecticut or any United States governmental authority or agency
      regulating the Pass Through Trustee's banking, trust or fiduciary powers
      or any judgment or order applicable to or binding on the Pass Through
      Trustee and does not contravene or result in any breach of, or constitute
      a default under, the Pass Through Trustee's articles of association or
      by-laws or any agreement or instrument to which the Pass Through Trustee
      is a party or by which it or any of its properties may be bound;

            (iv) neither the execution and delivery by the Pass Through Trustee
      of any of the Pass Through Trust Agreements, the Intercreditor Agreement
      or this Agreement, nor the consummation by the Pass Through Trustee of any
      of the transactions contemplated hereby or thereby, requires the consent
      or approval of, the giving of notice to, the registration with, or the
      taking of any other action with respect to, any Connecticut governmental
      authority or agency or any federal governmental authority or agency
      regulating the Pass Through Trustee's banking, trust or fiduciary powers;

            (v) there are no Taxes payable by the Pass Through Trustee imposed
      by the State of Connecticut or any political subdivision or taxing
      authority thereof in connection with the execution, delivery and
      performance by the Pass Through Trustee of this Agreement, any of the Pass
      Through Trust Agreements or the Intercreditor Agreement (other than
      franchise or other taxes based on or measured by any fees or compensation
      received by the Pass Through Trustee for services rendered in connection
      with the transactions contemplated by any of the Pass Through Trust
      Agreements), and there are no Taxes payable by the Pass Through Trustee
      imposed by the State of Connecticut or any political subdivision thereof
      in connection with the acquisition, possession or ownership by the Pass
      Through Trustee of any of the Secured Certificates (other than franchise
      or other taxes based on or measured by any fees or compensation received
      by the Pass Through Trustee for services rendered in connection with the
      transactions contemplated by any of the Pass Through Trust Agreements),
      and, assuming that for federal income tax purposes the trusts created by
      the Pass-Through Trust Agreements will not be taxable as corporations, but
      rather, each will be characterized as a grantor trust


                                      -19-
<PAGE>

      under subpart E, Part I, of Subchapter J of the Code or as a partnership,
      such trusts will not be subject to any Taxes imposed by the State of
      Connecticut or any political subdivision thereof;

            (vi) there are no pending or threatened actions or proceedings
      against the Pass Through Trustee before any court or administrative agency
      which individually or in the aggregate, if determined adversely to it,
      would materially adversely affect the ability of the Pass Through Trustee
      to perform its obligations under this Agreement, the Intercreditor
      Agreement or any Pass Through Trust Agreement;

            (vii) except for the issue and sale of the Certificates, the Pass
      Through Trustee has not directly or indirectly offered any Secured
      Certificate for sale to any Person or solicited any offer to acquire any
      Secured Certificates from any Person, nor has the Pass Through Trustee
      authorized anyone to act on its behalf to offer directly or indirectly any
      Secured Certificate for sale to any Person, or to solicit any offer to
      acquire any Secured Certificate from any Person; and the Pass Through
      Trustee is not in default under any Pass Through Trust Agreement; and

            (viii) the Pass Through Trustee is not directly or indirectly
      controlling, controlled by or under common control with any Underwriter,
      the Owner or the Guarantor.

            (ee) The Subordination Agent represents and warrants to the Owner,
the Guarantor, the Indenture Trustee, the Pass Through Trustee and the Liquidity
Provider in its capacity as such and in its individual capacity, as follows:

            (i) the Subordination Agent is duly incorporated, validly existing
      and in good standing under the laws of the Commonwealth of Massachusetts,
      and has the full corporate power, authority and legal right under the laws
      of the Commonwealth of Massachusetts and the United States pertaining to
      its banking, trust and fiduciary powers to execute and deliver each of the
      Liquidity Facilities, the Intercreditor Agreement and this Agreement and
      to perform its obligations under this Agreement, the Liquidity Facilities
      and the Intercreditor Agreement;

            (ii) this Agreement, each of the Liquidity Facilities and the
      Intercreditor Agreement have been duly authorized, executed and delivered
      by the Subordination Agent; this Agreement, each of the Liquidity
      Facilities and the Intercreditor Agreement constitute the legal, valid and
      binding obligations of the Subordination Agent enforceable against it in
      accordance with their respective terms, except as the same may be limited
      by applicable bankruptcy, insolvency, reorganization, moratorium or
      similar laws affecting the rights of creditors generally and by general
      principles of equity, whether considered in a proceeding at law or in
      equity;

            (iii) none of the execution, delivery and performance by the
      Subordination Agent of each of the Liquidity Facilities, the Intercreditor
      Agreement or this Agreement contravenes any law, rule or regulation of the
      Commonwealth of Massachusetts or any United States governmental authority
      or agency regulating the Subordination Agent's


                                      -20-
<PAGE>

      banking, trust or fiduciary powers or any judgment or order applicable to
      or binding on the Subordination Agent and do not contravene or result in
      any breach of, or constitute a default under, the Subordination Agent's
      articles of association or by-laws or any agreement or instrument to which
      the Subordination Agent is a party or by which it or any of its properties
      may be bound;

            (iv) neither the execution and delivery by the Subordination Agent
      of any of the Liquidity Facilities, the Intercreditor Agreement or this
      Agreement nor the consummation by the Subordination Agent of any of the
      transactions contemplated hereby or thereby requires the consent or
      approval of, the giving of notice to, the registration with, or the taking
      of any other action with respect to, any Massachusetts governmental
      authority or agency or any federal governmental authority or agency
      regulating the Subordination Agent's banking, trust or fiduciary powers;

            (v) there are no Taxes payable by the Subordination Agent imposed by
      the Commonwealth of Massachusetts or any political subdivision or taxing
      authority thereof in connection with the execution, delivery and
      performance by the Subordination Agent of this Agreement, any of the
      Liquidity Facilities or the Intercreditor Agreement (other than franchise
      or other taxes based on or measured by any fees or compensation received
      by the Subordination Agent for services rendered in connection with the
      transactions contemplated by the Intercreditor Agreement or any of the
      Liquidity Facilities), and there are no Taxes payable by the Subordination
      Agent imposed by the Commonwealth of Massachusetts or any political
      subdivision thereof in connection with the acquisition, possession or
      ownership by the Subordination Agent of any of the Secured Certificates
      (other than franchise or other taxes based on or measured by any fees or
      compensation received by the Subordination Agent for services rendered in
      connection with the transactions contemplated by the Intercreditor
      Agreement or any of the Liquidity Facilities);

            (vi) there are no pending or threatened actions or proceedings
      against the Subordination Agent before any court or administrative agency
      which individually or in the aggregate, if determined adversely to it,
      would materially adversely affect the ability of the Subordination Agent
      to perform its obligations under this Agreement, the Intercreditor
      Agreement or any Liquidity Facility;

            (vii) the Subordination Agent has not directly or indirectly offered
      any Secured Certificate for sale to any Person or solicited any offer to
      acquire any Secured Certificates from any Person, nor has the
      Subordination Agent authorized anyone to act on its behalf to offer
      directly or indirectly any Secured Certificate for sale to any Person, or
      to solicit any offer to acquire any Secured Certificate from any Person;
      and the Subordination Agent is not in default under any Liquidity
      Facility; and

            (viii) the Subordination Agent is not directly or indirectly
      controlling, controlled by or under common control with any Underwriter,
      the Owner or the Guarantor.

            SECTION 9. Reliance of Liquidity Provider. Each of the parties
hereto agrees and acknowledges that the Liquidity Provider shall be a third
party beneficiary of each of


                                      -21-
<PAGE>

the representations and warranties made herein by such party, and that the
Liquidity Provider may rely on such representations and warranties to the same
extent as if such representations and warranties were made to the Liquidity
Provider directly. The Owner agrees and acknowledges that the Liquidity Provider
shall be a third party beneficiary of the indemnities contained in Section 7(c)
hereof, and may rely on such indemnities to the same extent as if such
indemnities were made to the Liquidity Provider directly.

            SECTION 10. Other Documents. The Indenture Trustee agrees to
promptly furnish to the Owner copies of any supplement, amendment or waiver or
modification of any of the Operative Documents to which the Owner is not a
party. Each Loan Participant agrees that it will not take any action in respect
of the Collateral except through the Indenture Trustee pursuant to the Trust
Indenture or as otherwise permitted by the Trust Indenture.

            SECTION 11. Certain Covenants of the Owner. The Owner covenants and
agrees with each of the Loan Participants and the Indenture Trustee:

            (a) The Owner will cause to be done, executed, acknowledged and
delivered all and every such further acts, conveyances and assurances as the
Indenture Trustee shall reasonably require for accomplishing the purposes of
this Agreement and the other Operative Documents; provided that any instrument
or other document so executed by the Owner will not expand any obligations or
limit any rights of the Owner in respect of the transactions contemplated by any
Operative Documents.

            (b) The Owner will cause the Trust Indenture, all supplements and
amendments to the Trust Indenture and this Agreement to be promptly filed and
recorded, or filed for recording, to the extent permitted under the Federal
Aviation Act, or required under any other applicable law. Upon the execution and
delivery of the Trust Indenture, the Trust Indenture and the Trust Indenture
Supplement covering the Aircraft shall be filed for recording with the Federal
Aviation Administration.

            SECTION 12. [Intentionally Omitted].

            SECTION 13. Certain Definitions; Notices; Consent to Jurisdiction.
(a) Except as otherwise defined in this Agreement, terms used herein in
capitalized form shall have the meanings attributed thereto in the Annex A to
the Trust Indenture. Unless the context otherwise requires, any reference herein
to any of the Operative Documents refers to such document as it may be amended
from time to time.

            (b) All notices, demands, instructions and other communications
required or permitted to be given to or made upon any party hereto or to the
Guarantor shall be in writing and shall be personally delivered or sent by
registered or certified mail, postage prepaid, or by telecopier, or by prepaid
courier service, and shall be deemed to be given for purposes of this Agreement
on the day that such writing is delivered or sent to the intended recipient
thereof in accordance with the provisions of this Section 13(b). Unless
otherwise specified in a notice sent or delivered in accordance with the
foregoing provisions of this Section 13(b), notices, demands, instructions and
other communications in writing shall be given to or made upon the respective
parties hereto at their respective addresses (or to their respective telecopier
numbers) as follows:


                                      -22-
<PAGE>

(A) if to the Owner, the Guarantor, the Pass Through Trustee, the Subordination
Agent or the Indenture Trustee, to the respective addresses set forth below the
signatures of such parties at the foot of this Agreement, or (B) if to any
subsequent Certificate Holder, addressed to such Certificate Holder at its
address set forth in the Secured Certificate register maintained pursuant to
Section 2.07 of the Trust Indenture.

            (c) Each of the parties hereto (A) hereby irrevocably submits itself
to the non-exclusive jurisdiction of the United States District Court for the
Southern District of New York and to the non-exclusive jurisdiction of the
Supreme Court of the State of New York, New York County, for the purposes of any
suit, action or other proceeding arising out of this Agreement or any other
Operative Document, the subject matter of any thereof or any of the transactions
contemplated hereby or thereby brought by any party or parties thereto, or their
successors or assigns, and (B) hereby waives, and agrees not to assert, by way
of motion, as a defense, or otherwise, in any such suit, action or proceeding,
to the extent permitted by applicable law, that the suit, action or proceeding
is brought in an inconvenient forum, that the venue of the suit, action or
proceeding is improper, or that this Agreement or any other Operative Document
or the subject matter of any thereof or any of the transactions contemplated
hereby or thereby may not be enforced in or by such courts. The Owner hereby
generally consents to service of process at Cadwalader, Wickersham & Taft, 100
Maiden Lane, New York, New York 10038, Attention: Managing Attorney, or such
office of the Owner in New York City as from time to time may be designated by
the Owner in writing to the Indenture Trustee.

            SECTION 14. [Intentionally Omitted].

            SECTION 15. Miscellaneous.

            (a) [Intentionally Omitted].

            (b) The representations, warranties, indemnities and agreements of
the Owner, the Guarantor, the Indenture Trustee, the Subordination Agent and the
Pass Through Trustee provided for in this Agreement, and the Owner's, the
Guarantor's, the Indenture Trustee's, the Subordination Agent's and the Pass
Through Trustee's obligations under any and all thereof, shall survive the
making available of the Commitments by each Pass Through Trustee, the transfer
of any interest by any Loan Participant in any Secured Certificate or the
Collateral and the expiration or other termination of this Agreement or any
other Operative Document.

            (c) This Agreement may be executed by the parties hereto in separate
counterparts, each of which when so executed and delivered shall be an original,
but all such counterparts shall together constitute but one and the same
instrument. Neither this Agreement nor any of the terms hereof may be
terminated, amended, supplemented, waived or modified, except by an instrument
in writing signed by the party against which the enforcement of the termination,
amendment, supplement, waiver or modification is sought; and no such
termination, amendment, supplement, waiver or modification shall be effective
unless a signed copy thereof shall have been delivered to the Indenture Trustee.
The terms of this Agreement shall be binding upon, and inure to the benefit of,
the Owner and, subject to the terms of this Agreement, its successors and
permitted assigns, the Guarantor, the Pass Through Trustee and its successors as
Pass Through Trustee (and any additional trustee appointed) under any of the
Pass Through Trust


                                      -23-
<PAGE>

Agreements, each Certificate Holder and its successors and registered assigns
and the Indenture Trustee and its successors as Indenture Trustee under the
Trust Indenture. The terms of this Agreement shall inure to the benefit of the
Liquidity Provider, its successors and permitted assigns. THIS AGREEMENT SHALL
IN ALL RESPECTS BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF
THE STATE OF NEW YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND
PERFORMANCE. THIS AGREEMENT IS BEING DELIVERED IN THE STATE OF NEW YORK.

            (d) [Intentionally Omitted].

            (e) It is the intention of the parties hereto that the Indenture
Trustee will be entitled to the benefits of 11 U.S.C. ss. 1110 in the event of
any reorganization of the Owner under Chapter 11 of the Bankruptcy Code.

            SECTION 16. Sale/leaseback Transaction. Notwithstanding anything to
the contrary contained herein or any other Operative Document, upon not less
than __ days prior written notice to the parties hereto, the Owner shall have
the right to sell the Aircraft and transfer title to the Aircraft to an owner
trustee for the benefit of an owner participant (which shall be a "Transferee"
(as defined in the form of Leased Aircraft Participation Agreement (as such term
is defined in the Note Purchase Agreement)) in a transaction in which such owner
trustee assumes all of the obligations of the Owner under the Secured
Certificates and the Trust Indenture on a non-recourse basis (with the Owner
being released from such obligations, except to the extent accrued prior
thereto), leases the Aircraft to the Owner and assigns such lease to the
Indenture Trustee pursuant to an amended and restated trust indenture. In
connection with such a transaction, each of the parties hereto and each
Certificate Holder will execute and deliver appropriate documentation permitting
the owner trustee to assume the obligations of the Owner under the Secured
Certificates and the Trust Indenture on a non-recourse basis, releasing the
Owner from all obligations in respect of the Secured Certificates and the Trust
Indenture (except to the extent accrued prior thereto), and take all other
actions as are reasonably necessary to permit such assumption by the owner
trustee. In connection with any such transaction, the parties agree that (a) the
documents to be utilized shall be (i) an amended and restated participation
agreement [NW ____ __] amending and restating the Participation Agreement, such
amended and restated participation agreement to be substantially in the form of
the Leased Aircraft Participation Agreement (as such term is defined in the Note
Purchase Agreement), among the parties hereto, any Certificate Holder which is
not a party hereto and the owner trustee and owner participant, with (x) such
changes to such form to reflect the assumption of the Secured Certificates by
the owner trustee on a non-recourse basis rather than the issuance thereof by
the owner trustee and purchase thereof by the Purchasers and also to reflect the
release of the Owner from all obligations under the Secured Certificates and the
Trust Indenture (except to the extent accrued prior thereto) and (y) such other
changes as may be permitted in accordance with the Note Purchase Agreement
applicable to the revision of the Leased Aircraft Participation Agreement in
connection with a leveraged lease transaction, (ii) a lease agreement [NW ____
__], such lease agreement to be substantially in the form of the Lease (as such
term is defined in the Note Purchase Agreement), between the Owner and the owner
trustee with such changes as may be permitted in accordance with the provisions
of the Note Purchase Agreement applicable to the revision of the Lease in
connection with a leveraged lease transaction, (iii) an amended


                                      -24-
<PAGE>

and restated trust indenture [NW ____ __] amending and restating the Trust
Indenture, such amended and restated trust indenture to be substantially in the
form of the Leased Aircraft Indenture (as such term is defined in the Note
Purchase Agreement), between the owner trustee and the Indenture Trustee, with
(x) such changes to such form to reflect the assumption of all of the
obligations of the Owner under the Secured Certificates and the Trust Indenture
on a non-recourse basis and a release of the Contract Rights from the Granting
Clause of the Trust Indenture and (y) such other changes as may be permitted in
accordance with the Note Purchase Agreement applicable to the revision of the
Leased Aircraft Indenture in connection with a leveraged lease transaction, a
(iv) purchase agreement assignment [NW ____ ___], such purchase agreement
assignment to be substantially in the form of the Aircraft Purchase Agreement
Assignment (as such term is defined in the Note Purchase Agreement) between the
Owner and the owner trustee with such changes as may be permitted in accordance
with the provisions of the Note Purchase Agreement applicable to the Aircraft
Purchase Agreement Assignment in connection with a leveraged lease transaction,
(v) a trust agreement [NW ____ __], such trust agreement to be substantially in
the form of the Leased Aircraft Trust Agreement (as such term is defined in the
Note Purchase Agreement), between the owner trustee and the owner participant
with such changes as may be permitted in accordance with the provisions of the
Note Purchase Agreement applicable to the Leased Aircraft Trust Agreement in
connection with a leveraged lease transaction, and (vi) an amended and restated
guarantee [NW ____ __] amending and restating the Guarantee, such amended and
restated guarantee to be substantially in the form of the Leased Aircraft
Guarantee (as such term is defined in the Note Purchase Agreement) with such
changes as may be permitted in accordance with the Note Purchase Agreement
applicable to the Leased Aircraft Guarantee in connection with a leveraged lease
transaction and (b) the Secured Certificates shall be delivered to the Indenture
Trustee for cancellation in exchange for new secured certificates to be issued
to the Certificate Holders by the owner trustee, such new secured certificate to
be substantially in the form contained in Section 2.01 of the Leased Aircraft
Indenture (as such term is defined in the Note Purchase Agreement).
Notwithstanding the foregoing, the Owner shall not have the right to sell the
Aircraft and transfer title to the Aircraft to an owner trustee for the benefit
of the owner participant in a transaction in which such owner trustee assumes
all of the obligations of the Owner under the Secured Certificates and the Trust
Indenture on a non-recourse basis (with the Owner being released from such
obligations), leases the Aircraft to the Owner and assigns such lease to the
Indenture Trustee in a transaction such as that described above unless the Owner
causes to be delivered to the Indenture Trustee an opinion of counsel to the
effect that the Certificate Holders will not recognize income, gain or loss for
Federal income tax purposes as a result of such assumption and release and will
be subject to Federal income tax in the same amounts, in the same manner and at
the same time as would have been the case if such assumption and release had not
occurred and that the Pass Through Trusts will not be subject to Federal income
taxation as a result of such assumption and release.


                                      -25-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed by their respective officers thereunto duly authorized as of
the day and year first above written.

                                       NORTHWEST AIRLINES, INC.,
                                          Owner

                                       By:____________________________________
                                          Name:
                                          Title:

                                       Address: U.S.  Mail
                                                5101 Northwest Drive (A4010)
                                                St.  Paul, Minnesota 55111-3034

                                                Overnight Courier
                                                2700 Lone Oak Parkway (A4010)
                                                Eagan, Minnesota 55121
                                       Attn:    Treasurer
                                       Telecopy No.:  (612) 726-0665

                                       NORTHWEST AIRLINES CORPORATION,
                                          Guarantor

                                       By:____________________________________
                                          Name:
                                          Title:

                                       Address: U.S.  Mail
                                                5101 Northwest Drive (A4010)
                                                St.  Paul, Minnesota 55111-3034

                                                Overnight Courier
                                                2700 Lone Oak Parkway (A4010)
                                                Eagan, Minnesota 55121
                                       Attn:    Treasurer
                                       Telecopy No.:  (612) 726-0665


                                      -26-
<PAGE>

                                       STATE STREET BANK AND
                                       TRUST COMPANY,
                                          Indenture Trustee

                                       By:____________________________________
                                          Name:
                                          Title:

                                       Address: U.S. Mail
                                                Corporate Trust Department
                                                P.O. Box 778
                                                Boston, Massachusetts 02102-0778

                                                Overnight Courier
                                                Corporate Trust Department
                                                2 Avenue de Lafayette
                                                Boston, Massachusetts 02111-1724
                                       Telecopy No.:  (617) 662-1462

                                       STATE STREET BANK AND TRUST COMPANY OF
                                       CONNECTICUT, NATIONAL ASSOCIATION, not in
                                       its individual capacity, except as
                                       otherwise provided herein, but solely as
                                       Pass Through Trustee,
                                          Pass Through Trustee

                                       By:____________________________________
                                          Name:
                                          Title:

                                       Address: 225 Asylum Street, Goodwin
                                                Square
                                                Hartford, CT  06103
                                       Attn:    Corporate/Muni Department
                                       Telecopy No.:  (860) 244-1889


                                      -27-
<PAGE>

                                       STATE STREET BANK AND TRUST COMPANY, not
                                       in its individual capacity, except as
                                       otherwise provided herein, but solely as
                                       Subordination Agent,
                                          Subordination Agent

                                       By:____________________________________
                                          Name:
                                          Title:

                                       Address: U.S. Mail
                                                Corporate Trust Department
                                                P.O. Box 778
                                                Boston, Massachusetts 02102-0778

                                                Overnight Courier
                                                Corporate Trust Department
                                                2 Avenue de Lafayette
                                                Boston, Massachusetts 02111-1724
                                       Telecopy No.:  (617) 662-1462


                                      -28-
<PAGE>

                                   SCHEDULE I
                               Names and Addresses

Owner:                   Northwest Airlines, Inc.

                         U.S. Mail
                         5101 Northwest Drive (A4010)
                         St. Paul, Minnesota 55111-3034

                         Overnight Courier
                         2700 Lone Oak Parkway (A4010)
                         Eagan, Minnesota 55121

                         Attn: Treasurer
                         Telecopy No.: (612) 726-0665

                         Wire Transfer

                         USBank, Minneapolis
                         ABA No. 091000022
                         Acct. No. 150250099440

Indenture Trustee:       State Street Bank and Trust Company

                         U.S. Mail
                         Corporate Trust Department
                         P.O. Box 778
                         Boston, Massachusetts 02102-0778

                         Overnight Courier
                         Corporate Trust Department
                         2 Avenue de Lafayette
                         Boston, Massachusetts 02111-1724
                         Telecopy No.: (617) 662-1462

                         Wire Transfer

                         State Street Bank and Trust Company
                         ABA No. 011-000-028
                         for credit to State Street Bank and Trust Company
                         Acct. No. 9903-990-1
                         Attn: Corporate Trust Department
                         Reference: Northwest/NW [____ _]


                                  SCHEDULE I-1
<PAGE>

Loan Participant:        State Street Bank and Trust Company
                         of Connecticut, National Association
                         225 Asylum Street, Goodwin Square
                         Hartford, CT  06103
                         Attn:  Corporate/Muni Department
                         Telecopy No.:  (860) 244-1889

Subordination Agent:     State Street Bank and Trust Company

                         U.S. Mail
                         Corporate Trust Department
                         P.O. Box 778
                         Boston, Massachusetts 02102-0778

                         Overnight Courier
                         Corporate Trust Department
                         2 Avenue de Lafayette
                         Boston, Massachusetts 02111-1724
                         Telecopy No.: (617) 662-1462


                                  SCHEDULE I-2
<PAGE>

                                   SCHEDULE II
                                   Commitments

                                   Interest Rate
    Purchasers                     and Maturity              Purchase Price
    ----------                     ------------              --------------

Northwest Airlines
Pass Through Trust

                                7.575% Series A
                                Secured Certificates
1999-2A                         due [___________]            $[___________]

                                7.950% Series B
                                Secured Certificates
1999-2B                         due [___________]            $[___________]

                                8.304% Series C
                                Secured Certificates
1999-2C                         due [___________]            $[___________]


                                  SCHEDULE II-1
<PAGE>

                                  SCHEDULE III
                          Pass Through Trust Agreements

1.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2A, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

2.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2B, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

3.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2C, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.


                                 SCHEDULE III-1
<PAGE>

                                                                       EXHIBIT A
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                     [NW ____ _]

                    SCHEDULE OF COUNTRIES FOR REREGISTRATION

Argentina                      Malta
Australia                      Mexico
Austria                        Morocco
Bahamas                        Netherlands
Belgium                        New Zealand
Brazil                         Norway
Canada                         Paraguay
Chile                          People's Republic of China
Denmark                        Philippines
Egypt                          Portugal
Finland                        Republic of China (Taiwan)
France                         Singapore
Germany                        South Africa
Greece                         South Korea
Hungary                        Spain
Iceland                        Sweden
India                          Switzerland
Indonesia                      Thailand
Ireland                        Trinidad and Tobago
Italy                          United Kingdom
Japan                          Uruguay
Luxembourg                     Venezuela
Malaysia


                                  EXHIBIT A-1
<PAGE>

                                                                       EXHIBIT K
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                     [NW ____ _]

                      Section 7(b) - General Tax Indemnity

            (b)   General Tax Indemnity.

            (i) Indemnity. Except as provided in Section 7(b)(ii) hereof, the
      Owner shall pay, protect, save and on written demand shall indemnify and
      hold harmless any Tax Indemnitee from and against any and all Taxes
      howsoever imposed against any Tax Indemnitee, the Owner or the Aircraft,
      the Airframe, any Engine or any Part thereof or interest therein by any
      Federal, state or local government or other taxing authority in the United
      States or by any foreign government or any political subdivision or taxing
      authority thereof or by any territory or possession of the United States
      or by any international authority ("Taxing Authority") upon or in
      connection with or relating to (A) the construction, financing,
      refinancing, purchase, acquisition, acceptance, rejection, delivery,
      nondelivery, transport, ownership, registration, reregistration, insuring,
      assembly, possession, repossession, operation, location, use, control,
      condition, maintenance, repair, sale, return, abandonment, installation,
      storage, redelivery, replacement, manufacture, leasing, subleasing,
      modification, rebuilding, importation, transfer of title, transfer of
      registration, exportation or other application or disposition of the
      Aircraft, the Airframe, any Engine or any Part thereof or interest
      therein, (B) the rentals, receipts or earnings from the Aircraft, the
      Airframe, any Engine or any Part, (C) any amount paid or payable pursuant
      to any Operative Document or any document related thereto or the property
      or the income or other proceeds with respect to the Collateral, (D) the
      Aircraft, the Airframe, any Engine or any Part, (E) any or all of the
      Operative Documents, or the issuance of the Secured Certificates and any
      other documents contemplated hereby or thereby and amendments and
      supplements hereto and thereto or the execution, delivery or performance
      of any thereof or the issuance, acquisition, modification, holding or
      subsequent transfer thereof, (F) the payment of the principal of, or
      interest or Make-Whole Amount or other premium on, or other amounts
      payable with respect to, the Secured Certificates or the Pass Through
      Certificates, or (G) otherwise with respect to or in connection with the
      transactions contemplated by the Operative Documents.

            (ii) Exclusions from General Tax Indemnity. The provisions of
      Section 7(b)(i) shall not apply:

                  (1) with respect to any Tax Indemnitee to any Income Tax (as
            defined in Section 7(d) hereof) imposed by (A) the United States
            Federal government or (B) any U.S. state or local taxing
            jurisdiction;

                  (2) with respect to any Tax Indemnitee, to any Income Taxes
            imposed by any foreign or international government, jurisdiction or
            taxing authority or territory or possession of the United States
            except to the extent that such Tax


                                  EXHIBIT K-1
<PAGE>

            Indemnitee would be subject to such Income Tax if the sole
            connection between such Tax Indemnitee and the Taxing Authority had
            been the location and operation of the Aircraft or the activities of
            the Owner or any lessee within such Taxing Authority;

                  (3) to any capital gains taxes, excess profits taxes, value
            added taxes, accumulated earnings taxes, personal holding company
            taxes, succession taxes or estate or similar taxes;

                  (4) to any Tax imposed as a result of a transfer or
            disposition by a Tax Indemnitee including, without limitation, a
            transfer or disposition of all or any portion of its respective
            equitable or legal ownership interest in a Secured Certificate
            (including sales of participations therein), the Collateral (as
            defined in the Trust Indenture) or any Operative Document or any
            interest in such Tax Indemnitee;

                  (5) to any Tax based on or measured by any fees received by
            the Pass Through Trustee, the Indenture Trustee or any Agent in
            connection with any transaction contemplated by the Operative
            Documents;

                  (6) [Intentionally Omitted]

                  (7) to any Tax in the nature of an intangible or similar tax
            upon or with respect to the value or principal amount of the
            interest of any Tax Indemnitee in any of the Secured Certificates;

                  (8) with respect to any Tax Indemnitee to any Tax imposed on
            or with respect to a transferee (or subsequent transferee) of an
            original Tax Indemnitee to the extent such Taxes would not have been
            required to be withheld or imposed on or with respect to such
            original Tax Indemnitee;

                  (9) to any Tax which would not have been imposed but for an
            Indenture Trustee's Lien;

                  (10) to any Tax to the extent such Tax would not have been
            imposed but for a present or future connection between the Tax
            Indemnitee or any Affiliate thereof and the jurisdiction imposing
            such Taxes (including, without limitation, the Tax Indemnitee or an
            Affiliate thereof being or having been a citizen or resident
            thereof, or being or having been organized, present or engaged in a
            trade or business therein, or having or having had, a permanent
            establishment or fixed place of business therein, or engaging, or
            having engaged, in one or more transactions or activities therein
            unrelated to the transactions contemplated by the Operative
            Documents), other than a connection arising solely by reason of the
            transactions contemplated by the Operative Documents;

                  (11) to any Tax imposed on a Tax Indemnitee to the extent
            imposed as a result of such Tax Indemnitee's failure to comply with
            any certification, information, documentation, reporting or similar
            procedure that is required by


                                   EXHIBIT K-2
<PAGE>

            law, treaty or regulation as a condition to the allowance of any
            reduction in the rate of such Tax or any exemption or other relief
            from such Tax;

                  (12) to any Tax on a Tax Indemnitee to the extent arising out
            of, or caused by, or to the extent such Tax would not have been
            incurred but for, (A) the willful misconduct or gross negligence of
            such Tax Indemnitee or any of its Affiliates or (B) the inaccuracy
            or breach of any representation, warranty, covenant or agreement by
            such Tax Indemnitee or any of its Affiliates in any Operative
            Document;

                  (13) to any Tax on a Tax Indemnitee to the extent consisting
            of interest, penalties, fines or additions to Tax resulting from the
            negligence or willful misconduct of such Tax Indemnitee or any of
            its Affiliates in connection with the filing of, or failure to file,
            any tax return, the payment of, or failure to pay any Tax, or the
            conduct of any proceeding in respect thereof unless resulting from
            the failure by the Owner to perform its obligations under Section
            7(b)(v) hereof; or

                  (14) to any excise tax imposed on any Tax Indemnitee under
            Section 4975 of the Internal Revenue Code as a result of the use by
            such Tax Indemnitee or any of its Affiliates of the assets of an
            "employee benefit plan" (as defined in Section 3(3) of ERISA) to
            purchase a Secured Certificate or otherwise acquire any interest in
            any Secured Certificate.

            (iii) Calculation of General Tax Indemnity Payments. Any payment
      which the Owner shall be required to make to or for the account of any Tax
      Indemnitee with respect to any Tax which is subject to indemnification
      under this Section 7(b) shall be in an amount which, after reduction by
      the amount of all Taxes required to be paid by such Tax Indemnitee in
      respect of the receipt or accrual of such amount and after consideration
      of any current savings of such Tax Indemnitee resulting by way of any
      deduction, credit or other tax benefit attributable to such indemnified
      Tax that actually reduces any Taxes for which the Owner is not required to
      indemnify such Tax Indemnitee pursuant to this Section 7(b) or the Tax
      Indemnity Agreement, shall be equal to the payment otherwise required
      hereunder.

            If, by reason of any Tax payment made to or for the account of a Tax
      Indemnitee by the Owner pursuant to this Section 7(b), such Tax Indemnitee
      or any of its Affiliates subsequently realizes a tax deduction or credit
      (including a foreign tax credit) not previously taken into account in
      computing such payment, such Tax Indemnitee shall promptly pay to the
      Owner an amount equal to the sum of (I) the actual reduction in Taxes, if
      any, realized by such Tax Indemnitee which is attributable to such
      deduction or credit and (II) the actual reduction in Taxes realized by
      such Tax Indemnitee as a result of any payment made by such Tax Indemnitee
      pursuant to this sentence. For purposes of this Section 7(b)(iii), items
      of foreign Tax of any Tax Indemnitee shall be deemed to be utilized by
      such Tax Indemnitee as credits or deductions for any taxable year in
      accordance with the following priorities:


                                   EXHIBIT K-3
<PAGE>

            First, all available foreign Taxes for which such Tax Indemnitee was
            not indemnified or held harmless by anyone;

            Second, all available foreign Taxes for which such Tax Indemnitee
            was indemnified or held harmless by the Owner, and all available
            foreign taxes indemnified under any other transaction (except any
            described in Clause Third), on a pari passu basis; and

            Third, any remaining foreign Taxes arising from any transaction in
            which there is an express agreement that such Taxes shall be
            utilized after foreign taxes from other transactions.

      Once the foreign Tax for which such Tax Indemnitee was indemnified by the
      Owner is deemed to be utilized pursuant to the ordering rules contained in
      this paragraph, it shall not subsequently be recharacterized as not having
      been utilized as a result of a foreign tax liability arising in a
      subsequent year.

            Any Taxes that are imposed on any Tax Indemnitee as a result of the
      disallowance or reduction of any tax benefit referred to in this
      subsection as to which such Tax Indemnitee has made in full the payment to
      the Owner required hereby (or as to which such Tax Indemnitee would have
      made its payment but for Section 7(b)(viii) or which tax benefit was
      otherwise taken into account in computing the Owner's indemnity obligation
      pursuant to this Section 7) in a taxable year subsequent to the
      utilization by such Tax Indemnitee shall be treated as a Tax for which the
      Owner is obligated to indemnify such Tax Indemnitee pursuant to the
      provisions of this Section 7(b), without regard to the exclusions set
      forth in Section 7(b)(ii) hereof (other than clauses (12) or (13)
      thereto).

            Each Tax Indemnitee shall in good faith use reasonable efforts in
      filing its tax returns and in dealing with Taxing Authorities to seek and
      claim any tax savings which would result in payments to the Owner under
      this Section 7(b).

            (iv) General Tax Indemnity -- Contests. At the Owner's request, the
      Owner shall be entitled at its sole cost and expense (A) in the case of a
      contest involving only Taxes indemnified hereunder ("Indemnified Taxes")
      or (B) in any proceeding involving a claim for one or more Indemnified
      Taxes as well as a claim for other Taxes, where the contest of the claim
      for Indemnified Taxes can be severed from the contest of other Taxes, to
      assume responsibility for and control of the contest ("Owner Controlled
      Contest"). Unless otherwise required by law, any such contest shall be
      conducted by and in the name of the Owner. If a written claim shall be
      made against and received by any Tax Indemnitee for any Tax for which the
      Owner is obligated pursuant to this Section 7(b), such Tax Indemnitee
      shall notify the Owner promptly of such claim (it being understood and
      agreed that failure to provide such notice shall not adversely affect or
      otherwise prejudice any Tax the Owner's right to indemnity under this
      Section 7(b) except to the extent such failure has a materially adverse
      effect on the ability to contest such claim). If the Tax cannot be
      contested in a Owner Controlled Contest, upon request from the Owner
      within thirty (30) days after receipt of such notice, such Tax Indemnitee
      shall in good faith at the Owner's sole cost and expense contest the
      imposition of such


                                   EXHIBIT K-4
<PAGE>

      Tax (a "Tax Indemnitee Controlled Contest"). After consulting with the
      Owner and the Owner's counsel concerning the forum in which the adjustment
      is most likely to be favorably resolved, such Tax Indemnitee may select in
      its sole discretion after considering in good faith the Owner's and the
      Owner's counsel recommendation the forum for such contest and determine
      whether any such contest shall be by (A) resisting payment of such Tax,
      (B) paying such Tax under protest or (C) paying such Tax and seeking a
      refund or other repayment thereof. Except as otherwise provided in clause
      (Z) below, during the pendency of a contest pursuant to this Section
      7(b)(iv) the Owner may withhold payment of any Tax to the extent provided
      by applicable law. In no event shall such Tax Indemnitee be required, or
      the Owner be permitted, to contest the imposition of any Tax for which the
      Owner is obligated pursuant to this Section 7(b) unless (W) no Event of
      Default shall have occurred and be continuing (unless the Owner shall have
      provided security reasonably satisfactory to such Tax Indemnitee securing
      the Owner's performance of its obligations under this Section 7(b)), (X)
      the Owner shall have agreed to pay to such Tax Indemnitee on demand all
      reasonable costs and expenses on an after-tax basis that such Tax
      Indemnitee may incur in connection with contesting such claim (including,
      without limitation, all reasonable legal and accounting fees), (Y) such
      action to be taken will not result in a material risk of sale, forfeiture
      or loss of, or the creation of any Lien on, the Aircraft, the Engines or
      any Part, other than Permitted Liens, unless the Owner shall have provided
      such Tax Indemnitee security against such risk in form and amount
      reasonably acceptable to such Tax Indemnitee, and (Z) if such contest
      shall be conducted in a manner requiring the payment of the claim, the
      Owner shall have paid the amount required directly to the appropriate
      authority or made an advance of the amount thereof to such Tax Indemnitee
      on an interest-free basis and agreed to indemnify such Tax Indemnitee on
      an after-tax basis against any Taxes payable by such Tax Indemnitee with
      respect to such advance.

            Notwithstanding anything to the contrary in this Section 7(b), in
      any Tax Indemnitee Controlled Contest the Tax Indemnitee may not settle or
      agree to any claim without the prior written consent of the Owner, and the
      Tax Indemnitee shall conduct any such administrative proceedings and
      judicial contest in good faith in an attempt to minimize the amount
      payable by the Owner under this Section 7(b). The term "after-tax basis"
      for purposes of this Section 7(b) shall mean an amount which, after
      deduction of all Taxes required to be paid by or on behalf of the Tax
      Indemnitee in respect of the receipt or accrual of such amount, is equal
      to the payment required under the provisions of this Section 7(b) which
      require payments to be made on an after-tax basis.

            If any Tax Indemnitee shall obtain a refund of all or any part of
      any Tax paid by the Owner, such Tax Indemnitee shall pay the Owner an
      amount equal to the amount of such refund, including interest received
      attributable thereto, plus any net tax benefit (or minus any net tax
      detriment) realized by such Tax Indemnitee as a result of any refund
      received and payment by such Tax Indemnitee made pursuant to this
      sentence.

            Nothing contained in this Section 7(b)(iv) shall require any Tax
      Indemnitee to contest, or permit the Owner to contest, a claim which such
      Tax Indemnitee would otherwise be required to contest pursuant to this
      Section 7(b)(iv), if such Tax Indemnitee shall waive payment by the Owner
      of any amount that might otherwise be payable by the


                                  EXHIBIT K-5
<PAGE>

      Owner under this Section 7(b) in respect of such claim and any other
      claim, the contest of which would be adversely affected.

            (v) General Tax Indemnity -- Reports. If any report, return or
      statement is required to be filed with respect to any Tax which is subject
      to indemnification under this Section 7(b), the Owner shall timely file
      the same at its sole expense (except for any such report, return or
      statement which the Tax Indemnitee is required by law to file in its own
      name). The Owner shall have no obligation under the preceding sentence if
      such Tax Indemnitee, after receipt of the Owner's written request, shall
      have failed to furnish the Owner with such information in a timely fashion
      as is in such Tax Indemnitee's control and is not otherwise reasonably
      available to the Owner and is necessary to file such returns.

            (vi) Verification. At the Owner's written request after the Owner
      receives a Tax Indemnitee's computations showing the amount of any
      indemnity payable by the Owner to such Tax Indemnitee pursuant to this
      Section 7(b) or any amount payable by any Tax Indemnitee to the Owner
      pursuant to this Section 7(b), such computations shall be subject to
      confidential verification in writing by any nationally recognized firm of
      certified public accountants selected by the Owner and reasonably
      acceptable to such Tax Indemnitee. The accounting firm shall complete its
      review within thirty (30) days of the Owner's receipt of such Tax
      Indemnitee's computations. The computations of such accounting firm shall
      (i) be delivered simultaneously to the Owner and such Tax Indemnitee and
      (ii) absent manifest error, be final, binding and conclusive upon the
      Owner and such Tax Indemnitee. If the Owner pays such indemnity in whole
      or in part before completion of the verification procedure, appropriate
      adjustments will be made promptly after completion of the verification
      procedure (and nothing in this Section 7(b)(vi) shall be construed as
      changing the time when any such indemnity is payable under this Section
      7(b)) to take into account any redetermination of the indemnity by the
      accounting firm. The fee and disbursements of such firm shall be paid by
      the Owner unless such verification shall disclose an error made by such
      Tax Indemnitee in favor of such Tax Indemnitee exceeding the lesser of
      five percent (5%) of the original claim or $10,000, in which case such fee
      and disbursements shall be paid by such Tax Indemnitee. Such Tax
      Indemnitee shall cooperate with such accounting firm and (subject to such
      accounting firm's execution of a confidentiality agreement satisfactory to
      such Tax Indemnitee) shall supply such accounting firm with all
      information reasonably necessary to permit accomplishment of such review
      and determination. The sole responsibility of such accounting firm shall
      be to verify the computations of the amount payable hereunder and the
      interpretation of this Agreement shall not be within the scope of such
      accounting firm's responsibilities.

            (vii) General Tax Indemnity -- Payment. Except as provided in
      Section 7(b)(iv) hereof, the Owner shall pay any Tax for which it is
      liable pursuant to this Section 7(b) directly to the appropriate taxing
      authority if legally permissible or upon demand of a Tax Indemnitee shall
      pay such Tax and any other amounts due hereunder to such Tax Indemnitee
      within fifteen (15) Business Days of such demand, but in no event shall
      any such payments be required to be made by the Owner more than five (5)
      Business Days prior to the date the Tax to which any such payment
      hereunder relates is due in


                                   EXHIBIT K-6
<PAGE>

      immediately available funds. Any such demand for payment from a Tax
      Indemnitee shall specify in reasonable detail the payment and the facts
      upon which the right to payment is based. Each Tax Indemnitee shall
      promptly forward to the Owner any notice, bill or advice received by it
      concerning any Tax, provided, however, that the failure of any Tax
      Indemnitee to forward any such notice, bill or advice shall not adversely
      affect or otherwise prejudice such Tax Indemnitee's rights to
      indemnification under this Section 7(b) unless such failure materially
      adversely affects the ability to contest any claim reflected therein.
      Within thirty (30) days after the date of each payment by the Owner of any
      Tax indemnified against hereunder, the Owner shall furnish the appropriate
      Tax Indemnitee the original or a certified copy of a receipt for the
      Owner's payment of such Tax or such other evidence of payment of such Tax
      as is reasonably acceptable to such Tax Indemnitee.

            (viii) Application of Payments During Existence of Event of Default.
      Any amount payable to the Owner pursuant to the terms of this Section 7(b)
      shall not be paid to or retained by the Owner if at the time of such
      payment or retention an Event of Default shall have occurred and be
      continuing under the Trust Indenture. At such time as there shall not be
      continuing any such Event of Default, such amount shall be paid to the
      Owner to the extent not previously applied against the Owner's obligations
      hereunder as and when due after the Indenture Trustee shall have declared
      the Trust Indenture in default pursuant to Section 4 thereof.

            (ix) Reimbursements by Tax Indemnitees Generally. If, for any
      reason, the Owner is required to make any payment with respect to any
      Taxes imposed on any Tax Indemnitee, any Pass Through Trustee, any Loan
      Participant or the Subordination Agent in respect of the transactions
      contemplated by the Operative Documents or on the Aircraft, the Airframe,
      the Engines or any Part, which Taxes are not the responsibility of the
      Owner under this Section 7(b), then such Tax Indemnitee, Pass Through
      Trustee, Loan Participant or the Subordination Agent, as the case may be,
      shall pay to the Owner an amount which equals the amount paid by the Owner
      with respect to such Taxes plus interest thereon computed at an annual
      interest rate equal to the Base Rate plus one percent from the date of
      payment by the Owner.

            (x) Forms, etc. Each Tax Indemnitee agrees to furnish to the Owner
      from time to time such duly executed and properly completed forms that are
      requested by the Owner or that the Tax Indemnitee knows, or has reason to
      know in the ordinary course of its business, may be necessary or
      appropriate in order to claim any reduction of or exemption from any
      withholding tax imposed by any taxing authority in respect of any payments
      otherwise required to be made by the Owner pursuant to the Operative
      Documents, which reduction or exemption may be available to such Tax
      Indemnitee.

            (xi) Non-Parties. If a Tax Indemnitee is not a party to this
      Agreement, the Owner may require the Tax Indemnitee to agree to the terms
      of this Section 7(b) prior to making any payment to such Tax Indemnitee
      under this Section 7(b).


                                   EXHIBIT K-7
<PAGE>

                                                                       EXHIBIT L
                                                                TO PARTICIPATION
                                                                       AGREEMENT
                                                                    [NW ___9 __]

                        Section 7(c) - General Indemnity

            (c)   General Indemnity. The Owner hereby agrees to indemnify each
Indemnitee against, and agrees to protect, defend, save and keep harmless each
thereof from (whether or not the transactions contemplated herein or in any of
the other Operative Documents are consummated), any and all liabilities,
obligations, losses, damages, penalties, claims, actions, suits, out-of-pocket
costs, expenses and disbursements, of whatsoever kind and nature (collectively
called "Expenses") imposed on, incurred by or asserted against any Indemnitee,
in any way relating to or arising out of (A) any of the Operative Documents or
any lease or sublease of the Aircraft or the enforcement of any of the terms
thereof or any amendment, modification or waiver in respect thereof and, only in
the case of the Indemnitee who is the Subordination Agent or the Liquidity
Provider, the Intercreditor Agreement and the Liquidity Facilities, (B) the
manufacture, purchase, acceptance or rejection of the Airframe or any Engine,
(C) the Aircraft (or any portion thereof or any Engine or engine affixed to the
Airframe) whether or not arising out of the finance, refinance, ownership,
delivery, nondelivery, storage, lease, sublease, sub-sublease, possession, use,
non-use, operation, maintenance, registration, reregistration, condition,
modification, alteration, replacement, repair, substitution, sale, return or
other disposition of the Aircraft (or any portion thereof or any Engine or
engine affixed to the Airframe) including, without limitation, latent or other
defects, whether or not discoverable, strict tort liability and any claim for
patent, trademark or copyright infringement or (D) the offer, sale or delivery
of the Secured Certificates (the indemnity in this clause (D) to extend also to
any person who controls an Indemnitee within the meaning of Section 15 of the
Securities Act of 1933, as amended); provided that the foregoing indemnity as to
any Indemnitee shall not extend to any Expense resulting from or arising out of
or which would not have occurred but for one or more of the following: (A) any
representation or warranty by such Indemnitee (or any member of the Related
Indemnitee Group) in the Operative Documents, the Intercreditor Agreement, the
Liquidity Facilities or the Pass Through Trust Agreements or in connection
therewith being incorrect in any material respect, or (B) the failure by such
Indemnitee (or any member of the Related Indemnitee Group) to perform or observe
any agreement, covenant or condition in any of the Operative Documents, the
Intercreditor Agreement, the Liquidity Facilities or the Pass Through Trust
Agreements applicable to it including, without limitation, the creation or
existence of a Loan Participant Lien or an Indenture Trustee's Lien (except to
the extent such failure was caused directly by the failure of the Owner to
perform any obligation under an Owner Document), or (C) the willful misconduct
or the gross negligence of such Indemnitee (or any member of the Related
Indemnitee Group) (other than gross negligence imputed to such Indemnitee (or
any member of the Related Indemnitee Group) solely by reason of its interest in
the Aircraft), or (D) with respect to any Indemnitee, a disposition (voluntary
or involuntary) by such Indemnitee of all or any part of such Indemnitee's
interest in the Airframe, any Engine or in the Operative Documents other than
during the continuance of an Event of Default under the Trust Indenture, or (E)
any Tax whether or not the Owner is required to indemnify for such Tax pursuant
to Section 7(b) hereof (it being understood that Section 7(b) hereof provides
for the Owner's liability with respect to Taxes), or (F) in the case of an
Indemnitee which is a Loan


                                   EXHIBIT L-1
<PAGE>

Participant, a Certificate Holder or the Indenture Trustee (in its individual or
trust capacity) and the affiliates, successors and assigns thereof, a failure on
the part of the Indenture Trustee to use ordinary care to distribute in
accordance with the Trust Indenture any amounts received and distributable by it
thereunder, or (G) the authorization or giving or withholding of any future
amendments, supplements, waivers or consents with respect to any of the
Operative Documents other than such as have been consented to, approved,
authorized or requested by the Owner, or (H) subject to the next succeeding
paragraph, any loss of tax benefits or increase in tax liability under any tax
law whether or not the Owner is required to indemnify therefor pursuant to this
Agreement, or (I) any Expense which is specified to be for the account of an
Indemnitee pursuant to any Operative Document without express right of
reimbursement under any Operative Document, or (J) as to any Indemnitee the
funding of such Indemnitee's participation in the transaction contemplated by
the Operative Documents giving rise to a "prohibited transaction" within the
meaning of the provisions of the Code or the Regulations of the United States
Department of Labor implementing ERISA or any other violation of the fiduciary
responsibility provisions of ERISA. The foregoing indemnity shall not extend to
any Expense to the extent that such Expense is not caused by, or does not arise
out of, an act, omission or event which occurs prior to the termination of the
Lien of the Trust Indenture and the payment of all other payments required to be
paid by the Owner under the Operative Documents.

            The Owner further agrees that any payment or indemnity pursuant to
this Section 7(c) in respect of any Expenses shall be in an amount which, after
deduction of all Taxes required to be paid by such recipient with respect to
such payment or indemnity under the laws of any Federal, state or local
government or taxing authority in the United States, or under the laws of any
taxing authority or governmental subdivision of a foreign country, or any
territory or possession of the United States or any international authority,
shall be equal to the excess, if any, of (A) the amount of such Expense over (B)
the net reduction in Taxes required to be paid by such recipient resulting from
the accrual or payment of such Expense.

            If, by reason of any Expense payment made to or for the account of
an Indemnitee by the Owner pursuant to this Section 7(c), such Indemnitee
subsequently realizes a tax deduction or credit (including foreign tax credit
and any reduction in Taxes) not previously taken into account in computing such
payment, such Indemnitee shall promptly pay to the Owner, but only if the Owner
shall have made all payments then due and owing to such Indemnitee under the
Operative Documents, an amount equal to the sum of (I) the actual reduction in
Taxes realized by such Indemnitee which is attributable to such deduction or
credit, and (II) the actual reduction in Taxes realized by such Indemnitee as a
result of any payment made by such Indemnitee pursuant to this sentence.

            If a claim is made against an Indemnitee involving one or more
Expenses and such Indemnitee has notice thereof, such Indemnitee shall promptly,
upon receiving such notice, give notice of such claim to the Owner; provided
that the failure to provide such notice shall not release the Owner from any of
its obligations to indemnify hereunder, and no payment by the Owner to an
Indemnitee pursuant to this Section 7(c) shall be deemed to constitute a waiver
or release of any right or remedy which the Owner may have against such
Indemnitee for any actual damages as a result of the failure by such Indemnitee
to give the Owner such notice. The Owner shall be entitled, at its sole cost and
expense, acting through counsel acceptable to the respective Indemnitee, (A) so
long as the Owner has agreed in a writing acceptable to such Indemnitee that the
Owner is liable to such Indemnitee for such Expense hereunder (unless such
Expense is covered by the proviso to the first paragraph of this Section 7(c)),
in any judicial or administrative proceeding that involves solely a claim for
one or more Expenses, to assume responsibility for and control thereof, (B) so
long as the Owner has agreed in a writing acceptable to such Indemnitee that


                                   EXHIBIT L-2
<PAGE>

the Owner is liable to such Indemnitee for such Expense hereunder (unless such
Expense is covered by the proviso to the first paragraph of this Section 7(c)),
in any judicial or administrative proceeding involving a claim for one or more
Expenses and other claims related or unrelated to the transactions contemplated
by the Operative Documents, to assume responsibility for and control of such
claim for Expenses to the extent that the same may be and is severed from such
other claims (and such Indemnitee shall use its best efforts to obtain such
severance), and (C) in any other case, to be consulted by such Indemnitee with
respect to judicial proceedings subject to the control of such Indemnitee.
Notwithstanding any of the foregoing to the contrary, the Owner shall not be
entitled to assume responsibility for and control of any such judicial or
administrative proceedings (M) while an Event of Default shall have occurred and
be continuing, (N) if such proceedings will involve a material risk of the sale,
forfeiture or loss of, or the creation of any Lien (other than a Permitted Lien)
on the Aircraft, the Collateral or any part thereof, or (O) if such proceeding
could in the good faith opinion of such Indemnitee entail any material risk of
criminal liability or present a conflict of interest making separate
representation necessary. The affected Indemnitee may participate at its own
expense and with its own counsel in any judicial proceeding controlled by the
Owner pursuant to the preceding provisions.

            The affected Indemnitee shall supply the Owner with such information
reasonably requested by the Owner as is necessary or advisable for the Owner to
control or participate in any proceeding to the extent permitted by this Section
7(c). Such Indemnitee shall not enter into a settlement or other compromise with
respect to any Expense without the prior written consent of the Owner, which
consent shall not be unreasonably withheld or delayed, unless such Indemnitee
waives its right to be indemnified with respect to such Expense under this
Section 7(c).

            The Owner shall supply the affected Indemnitee with such information
reasonably requested by such Indemnitee as is necessary or advisable for such
Indemnitee to control or participate in any proceeding to the extent permitted
by this Section 7(c).

            When the Owner or the insurers under a policy of insurance
maintained by the Owner (or any Lessee) undertakes the defense of an Indemnitee
with respect to an Expense, no additional legal fees or expenses of such
Indemnitee in connection with the defense of such Indemnitee shall be
indemnified hereunder unless such fees or expenses were incurred at the written
request of the Owner or such insurers, provided that no such defense shall be
compromised or settled on a basis that admits any gross negligence or willful
misconduct on the part of such Indemnitee without such Indemnitee's prior
consent.

            In the case of any Expense indemnified by the Owner hereunder which
is covered by a policy of insurance maintained by the Owner (or any Lessee)
pursuant to Section 7.04 of the Trust Indenture or otherwise, it shall be a
condition of such indemnity with respect to any particular Indemnitee that such
Indemnitee shall cooperate with the insurers in the exercise of their rights to
investigate, defend or compromise such Expense as may be required to retain the


                                   EXHIBIT L-3
<PAGE>

benefits of such insurance with respect to such Expense. Notwithstanding any of
the foregoing to the contrary, with respect to any Expense which is covered
under policies of insurance maintained by the Owner (or any Lessee) pursuant to
Section 7.04 of the Trust Indenture or otherwise, the rights of an Indemnitee to
control or participate in any proceeding shall be modified to the extent
necessary to comply with the requirements of such policies and the rights of the
insurers thereunder.

            Upon payment of any Expense or Tax pursuant to this Section 7, the
Owner or, if any Expense or Tax has been paid by insurers, the insurers, without
any further action, shall be subrogated to any claims the affected Indemnitee
may have relating thereto other than claims under Section 5.03 of the Trust
Indenture. Such Indemnitee agrees to give such further assurances or agreements
and to cooperate with the Owner or the insurers to permit the Owner or the
insurers to pursue such claims, if any, to the extent reasonably requested by
the Owner or the insurers.

            In the event that the Owner shall have paid an amount to an
Indemnitee pursuant to this Section 7(c), and such Indemnitee subsequently shall
be reimbursed in respect of such indemnified amount from any other Person, such
Indemnitee shall promptly pay to the Owner an amount equal to the amount of such
reimbursement (but in no event more than such payment from the Owner) plus any
net tax benefit (or minus any net tax detriment) realized by such Indemnitee as
a result of any reimbursement received and payment made by such Indemnitee
pursuant to this sentence, provided that (i) no Event of Default has occurred
and is continuing and (ii) such Indemnitee shall have no obligation to reimburse
the Owner if the Owner has not paid such Indemnitee all amounts required
pursuant to this Section 7(c) and any other amounts then due to such Indemnitee
from the Owner under any of the Operative Documents.

            The Owner's obligations under the indemnities provided for in this
Agreement shall be those of a primary obligor, whether or not the Person
indemnified shall also be indemnified with respect to the same matter under the
terms of any other document or instrument, and the Person seeking
indemnification from the Owner pursuant to any provision of this Agreement may
proceed directly against the Owner without first seeking to enforce any other
right of indemnification.


                                   EXHIBIT L-4



                                                                   Exhibit 99(h)

================================================================================

                     TRUST INDENTURE AND SECURITY AGREEMENT
                                   [NW ____ _]

                          Dated as of [_______________]

                                     Between

                            NORTHWEST AIRLINES, INC.,

                                      Owner

                                       and

                      STATE STREET BANK AND TRUST COMPANY,
                         not in its individual capacity,
                       except as expressly stated herein,
                        but solely as Indenture Trustee,

                                Indenture Trustee

                          SECURED CERTIFICATES COVERING
                    ONE AIRBUS [A320-212] [A319-113] AIRCRAFT
                    BEARING U.S. REGISTRATION MARK N[______]
                        OWNED BY NORTHWEST AIRLINES, INC.

================================================================================
<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                          Page
                                                                                          ----
<S>               <C>                                                                       <C>
                                          ARTICLE I

                                         DEFINITIONS

                                          ARTICLE II

                                   THE SECURED CERTIFICATES

SECTION 2.01.     Form of Secured Certificates...............................................4
SECTION 2.02.     Issuance and Terms of Secured Certificates.................................8
SECTION 2.03.     [Intentionally Omitted]...................................................10
SECTION 2.04.     Method of Payment.........................................................10
SECTION 2.05.     Application of Payments...................................................12
SECTION 2.06.     Termination of Interest in Collateral.....................................12
SECTION 2.07.     Registration, Transfer and Exchange of Secured Certificates...............13
SECTION 2.08.     Mutilated, Destroyed, Lost or Stolen Secured Certificates.................14
SECTION 2.09.     Payment of Expenses on Transfer; Cancellation.............................14
SECTION 2.10.     Mandatory Redemptions of Secured Certificates.............................15
SECTION 2.11.     Voluntary Redemptions of Secured Certificates.............................15
SECTION 2.12.     Redemptions; Notice of Redemption.........................................15
SECTION 2.13.     Assumption of Secured Certificates........................................16
SECTION 2.14.     [Intentionally Omitted]...................................................16
SECTION 2.15.     Subordination.............................................................16

                                         ARTICLE III

                      RECEIPT, DISTRIBUTION AND APPLICATION OF PAYMENTS

SECTION 3.01.     Basic Distributions.......................................................17
SECTION 3.02.     Event of Loss; Replacement; Optional Redemption...........................18
SECTION 3.03.     Payments After Event of Default...........................................19
SECTION 3.04.     Certain Payments..........................................................20
SECTION 3.05.     Other Payments............................................................21
SECTION 3.06.     Payments to the Owner.....................................................21
SECTION 3.07.     Application of Payments Under Guarantee...................................21

                                          ARTICLE IV

                       EVENTS OF DEFAULT; REMEDIES OF INDENTURE TRUSTEE
</TABLE>


                                       -i-
<PAGE>

<TABLE>
<S>               <C>                                                                       <C>
SECTION 4.01.     Event of Default..........................................................21
SECTION 4.02.     Remedies..................................................................23
SECTION 4.03.     Return of Aircraft, Etc...................................................25
SECTION 4.04.     Remedies Cumulative.......................................................26
SECTION 4.05.     Discontinuance of Proceedings.............................................26
SECTION 4.06.     Waiver of Past Defaults...................................................26
SECTION 4.07.     Appointment of Receiver...................................................27
SECTION 4.08.     Indenture Trustee Authorized to Execute Bills of Sale, Etc................27
SECTION 4.09.     Rights of Certificate Holders to Receive Payment..........................27

                                          ARTICLE V

                               DUTIES OF THE INDENTURE TRUSTEE

SECTION 5.01.     Notice of Event of Default................................................27
SECTION 5.02.     Action upon Instructions; Certain Rights and Limitations..................28
SECTION 5.03.     Indemnification...........................................................28
SECTION 5.04.     No Duties Except as Specified in Trust Indenture or Instructions..........29
SECTION 5.05.     No Action Except Under Trust Indenture or Instructions....................29
SECTION 5.06.     Investment of Amounts Held by Indenture Trustee...........................29

                                          ARTICLE VI

                                    THE INDENTURE TRUSTEE

SECTION 6.01.     Acceptance of Trusts and Duties...........................................30
SECTION 6.02.     Absence of Duties.........................................................30
SECTION 6.03.     No Representations or Warranties as to Aircraft or Documents..............30
SECTION 6.04.     No Segregation of Monies; No Interest.....................................31
SECTION 6.05.     Reliance; Agreements; Advice of Counsel...................................31
SECTION 6.06.     Compensation..............................................................31
SECTION 6.07.     Instructions from Certificate Holders.....................................32

                                         ARTICLE VII

                                    COVENANTS OF THE OWNER

SECTION 7.01.     Liens.....................................................................32
SECTION 7.02.     Registration, Maintenance and Operation; Possession and Leases;
                    Insignia................................................................33
SECTION 7.03.     Replacement and Pooling of Parts; Alterations, Modifications and
                    Additions...............................................................38
SECTION 7.04.     Insurance.................................................................40
SECTION 7.05.     Inspection................................................................45
SECTION 7.06.     Loss, Destruction, Requisition, etc.......................................45
SECTION 7.07.     Interests in the Purchase Agreement.......................................50
</TABLE>


                                      -ii-
<PAGE>

<TABLE>
<S>               <C>                                                                       <C>
                                         ARTICLE VIII

                                       INDEMNIFICATION

SECTION 8.01.     Scope of Indemnification..................................................52

                                          ARTICLE IX

                               SUCCESSOR AND SEPARATE TRUSTEES

SECTION 9.01.     Resignation of Indenture Trustee; Appointment of Successor................53
SECTION 9.02.     Appointment of Additional and Separate Trustees...........................54

                                          ARTICLE X

                      SUPPLEMENT AND AMENDMENTS TO THIS TRUST INDENTURE
                                     AND OTHER DOCUMENTS

SECTION 10.01.    Instructions of Majority; Limitations.....................................56
SECTION 10.02.    Indenture Trustee Protected...............................................57
SECTION 10.03.    Documents Mailed to Certificate Holders...................................57
SECTION 10.04.    No Request Necessary for Trust Indenture Supplement.......................57

                                          ARTICLE XI

                                        MISCELLANEOUS

SECTION 11.01.    Termination of Trust Indenture............................................57
SECTION 11.02.    No Legal Title to Collateral in Certificate Holders.......................58
SECTION 11.03.    Sale of Aircraft by Indenture Trustee Is Binding..........................58
SECTION 11.04.    Trust Indenture for Benefit of the Owner, Indenture Trustee, and
                    Certificate Holders.....................................................58
SECTION 11.05.    Notices...................................................................58
SECTION 11.06.    Severability..............................................................59
SECTION 11.07.    No Oral Modification or Continuing Waivers................................59
SECTION 11.08.    Successors and Assigns....................................................59
SECTION 11.09.    Headings..................................................................59
SECTION 11.10.    Normal Commercial Relations...............................................59
SECTION 11.11.    Governing Law; Counterpart Form...........................................60
SECTION 11.12.    Voting By Certificate Holders.............................................60
SECTION 11.13.    Bankruptcy................................................................60
</TABLE>


                                      -iii-
<PAGE>

                                                               Page
                                                               ----

ANNEX A        Definitions

EXHIBIT A      Form of Trust Indenture Supplement

SCHEDULE I     Secured Certificates Amortization

SCHEDULE II    Pass Through Trust Agreements

SCHEDULE III   Schedule of Permitted Lessees


                                      -iv-
<PAGE>

                     TRUST INDENTURE AND SECURITY AGREEMENT
                                         [NW ____ _]

            TRUST INDENTURE AND SECURITY AGREEMENT [NW ____ _], dated as of
[_______________] ("Trust Indenture") between NORTHWEST AIRLINES, INC., a
Minnesota corporation (the "Owner") and STATE STREET BANK AND TRUST COMPANY, a
Massachusetts trust company, not in its individual capacity, except as expressly
stated herein, but solely as Indenture Trustee hereunder (together with its
successors hereunder, the "Indenture Trustee").

                              W I T N E S S E T H:

            WHEREAS, all capitalized terms used herein shall have the respective
meanings referred to in Article I hereof;

            WHEREAS, the parties desire by this Trust Indenture, among other
things, (i) to provide for the issuance by the Owner to the Pass Through
Trustees (or their designee) of the Secured Certificates specified on Schedule I
hereto (it being understood that not all Series may be issued, in which case,
references in this Trust Indenture to Series not issued shall be disregarded)
and (ii) to provide for the assignment, mortgage and pledge by the Owner to the
Indenture Trustee, as part of the Collateral hereunder, among other things, of
all of the Owner's right, title and interest in and to the Aircraft and, except
as hereinafter expressly provided, all payments and other amounts received
hereunder in accordance with the terms hereof, as security for, among other
things, the Owner's obligations to the Indenture Trustee, for the ratable
benefit and security of the Certificate Holders, subject to Section 2.15 and
Article III hereof;

            WHEREAS, all things have been done to make the Secured Certificates,
when executed by the Owner and authenticated and delivered by the Indenture
Trustee hereunder, the valid, binding and enforceable obligations of the Owner;
and

            WHEREAS, all things necessary to make this Trust Indenture the
valid, binding and legal obligation of the Owner for the uses and purposes
herein set forth, in accordance with its terms, have been done and performed and
have happened:

                                 GRANTING CLAUSE

            NOW, THEREFORE, THIS TRUST INDENTURE AND SECURITY AGREEMENT
WITNESSETH, that, to secure the prompt payment of the Principal Amount of,
interest on, Make-Whole Amount, if any, and all other amounts due with respect
to, all Secured Certificates from time to time outstanding hereunder and the
performance and observance by the Owner of all the agreements, covenants and
provisions herein and in the Participation Agreement and the Secured
Certificates contained, for the benefit of the Certificate Holders and the
prompt payment of all amounts from time to time owing hereunder and under the
Participation Agreement to the Certificate Holders by the Owner and for the uses
and purposes and subject to the terms and provisions hereof, and in
consideration of the premises and of the covenants herein
<PAGE>

contained, and of the acceptance of the Secured Certificates by the holders
thereof, and for other good and valuable consideration the receipt and adequacy
whereof are hereby acknowledged, the Owner has granted, bargained, sold,
assigned, transferred, conveyed, mortgaged, pledged and confirmed, and does
hereby grant, bargain, sell, assign, transfer, convey, mortgage, pledge and
confirm, unto the Indenture Trustee, its successors in trust and assigns, for
the security and benefit of the Certificate Holders, a first priority security
interest in and mortgage lien on all right, title and interest of the Owner in,
to and under the following described property, rights and privileges, (including
all property hereafter specifically subjected to the Lien of this Trust
Indenture by the Trust Indenture Supplement or any mortgage supplemental
hereto), to wit:

            (a) the Aircraft (including the Airframe and the Engines and all
replacements thereof and substitutions therefor as provided herein), all as more
particularly described in the Trust Indenture Supplement executed and delivered
with respect to the Aircraft or any such replacements or substitutions therefor,
as provided in this Trust Indenture;

            (b) the Contract Rights, but subject always to the provisions of
Section 7.07 hereof;

            (c) all insurance and requisition proceeds with respect to the
Aircraft, including but not limited to the insurance required under Section 7.04
hereof, but excluding any insurance maintained by the Owner and not required
under Section 7.04 hereof;

            (d) all monies and securities from time to time deposited or
required to be deposited with the Indenture Trustee pursuant to any terms of
this Indenture or required hereby to be held by the Indenture Trustee hereunder;
and

            (e) all proceeds of the foregoing.

            SUBJECT TO all of the terms and conditions of this Trust Indenture
and the rights of the Owner hereunder.

            Concurrently with the delivery hereof, the Owner is delivering to
the Indenture Trustee executed copies of the Participation Agreement and the
Consent and Agreement.

            TO HAVE AND TO HOLD all and singular the aforesaid property unto the
Indenture Trustee, and its successors and assigns, in trust for the benefit and
security of the Certificate Holders, except as provided in Section 2.15 and
Article III hereof without any preference, distinction or priority of any one
Secured Certificate over any other by reason of priority of time of issue, sale,
negotiation, date of maturity thereof or otherwise for any reason whatsoever,
and for the uses and purposes and in all cases and as to all property specified
in paragraphs (1) through (5) inclusive above, subject to the terms and
provisions set forth in this Trust Indenture.

            It is expressly agreed that anything herein contained to the
contrary notwithstanding, the Owner shall remain liable under each of the
Indenture Agreements to which it is a party to perform all of the obligations
assumed by it thereunder, except to the extent prohibited or excluded from doing
so pursuant to the terms and provisions thereof, and the


                                      -2-
<PAGE>

Indenture Trustee and the Certificate Holders shall have no obligation or
liability under the Indenture Agreements, by reason of or arising out of the
assignment hereunder, nor shall the Indenture Trustee or the Certificate Holders
be required or obligated in any manner to perform or fulfill any obligations of
the Owner under or pursuant to any of the Indenture Agreements to which it is a
party, or, except as herein expressly provided, to make any payment, or to make
any inquiry as to the nature or sufficiency of any payment received by it, or
present or file any claim, or take any action to collect or enforce the payment
of any amounts which may have been assigned to it or to which it may be entitled
at any time or times.

            The Owner does hereby constitute the Indenture Trustee the true and
lawful attorney of the Owner, irrevocably, granted for good and valuable
consideration and coupled with an interest and with full power of substitution,
and with full power (in the name of the Owner or otherwise) to ask for, require,
demand, receive, compound and give acquittance for any and all monies and claims
for monies (in each case including insurance and requisition proceeds) due and
to become due under or arising out of the Indenture Agreements, and all other
property which now or hereafter constitutes part of the Collateral, to endorse
any checks or other instruments or orders in connection therewith and to file
any claims or to take any action or to institute any proceedings which the
Indenture Trustee may deem to be necessary or advisable in the premises. Without
limiting the generality of the foregoing, but subject to the rights of the Owner
hereunder, during the continuance of any Event of Default under this Trust
Indenture, the Indenture Trustee shall have the right under such power of
attorney to accept any offer in connection with the exercise of remedies as set
forth herein of any purchaser to purchase the Airframe and Engines and upon such
purchase to execute and deliver in the name of and on behalf of the Owner an
appropriate bill of sale and other instruments of transfer relating to the
Airframe and Engines, when purchased by such purchaser, and to perform all other
necessary or appropriate acts with respect to any such purchase, and in its
discretion to file any claim or take any other action or proceedings, either in
its own name or in the name of the Owner or otherwise, which the Indenture
Trustee may deem necessary or appropriate to protect and preserve the right,
title and interest of the Indenture Trustee in and to such other sums and the
security intended to be afforded hereby; provided, however, that no action of
the Indenture Trustee pursuant to this paragraph shall increase the obligations
or liabilities of the Owner to any Person beyond those obligations and
liabilities specifically set forth in this Trust Indenture and in the other
Operative Documents.

            The Owner agrees that at any time and from time to time, upon the
written request of the Indenture Trustee, the Owner will promptly and duly
execute and deliver or cause to be duly executed and delivered any and all such
further instruments and documents as the Indenture Trustee may reasonably deem
necessary or desirable to perfect, preserve or protect the mortgage, security
interests and assignments created or intended to be created hereby or to obtain
for the Indenture Trustee the full benefits of the assignment hereunder and of
the rights and powers herein granted.

            The Owner does hereby warrant and represent that it has not assigned
or pledged, and hereby covenants and agrees that it will not assign or pledge,
so long as the assignment hereunder shall remain in effect, and the Lien hereof
shall not have been released pursuant to


                                      -3-
<PAGE>

Section 11.01 hereof, any of its right, title or interest hereby assigned, to
anyone other than the Indenture Trustee and its predecessor(s) in this
transaction.

            IT IS HEREBY COVENANTED AND AGREED by and between the parties hereto
as follows:

                                   ARTICLE I

                                   DEFINITIONS

            Unless otherwise defined herein or the context requires otherwise,
capitalized terms utilized but not defined herein shall have the respective
meanings set forth or incorporated by reference in Annex A hereto for all
purposes of the Trust Indenture.

                                   ARTICLE II

                            THE SECURED CERTIFICATES

            SECTION 2.01. Form of Secured Certificates.

            The Secured Certificates shall be substantially in the form set
forth below:

THIS SECURED CERTIFICATE HAS NOT BEEN REGISTERED PURSUANT TO THE SECURITIES ACT
OF 1933, AS AMENDED (THE "ACT"), OR PURSUANT TO THE SECURITIES LAWS OF ANY
STATE. ACCORDINGLY, THIS SECURED CERTIFICATE MAY NOT BE SOLD UNLESS EITHER
REGISTERED UNDER THE ACT AND SUCH APPLICABLE STATE LAWS OR AN EXEMPTION FROM
SUCH REGISTRATIONS IS AVAILABLE.

NORTHWEST AIRLINES, INC. SERIES [___] SECURED CERTIFICATE DUE [_____] ISSUED IN
CONNECTION WITH THE AIRBUS [320-212] [A319-113] AIRCRAFT BEARING UNITED STATES
REGISTRATION NUMBER N[_____].

No.____                                                        Date:  [________]
$_________________

               INTEREST RATE                                MATURITY DATE
                                                              [________]
                                                          [________,_______]

            NORTHWEST AIRLINES, INC. (the "Owner"), hereby promises to pay to
___________, or the registered assignee thereof, the principal sum of $_________
(the "Principal Amount"), together with interest on the amount of the Principal
Amount remaining unpaid from time to time (calculated on the basis of a year of
360 days comprised of twelve 30-day months) from the date hereof until paid in
full at a rate per annum equal to the interest rate indicated above. The
Principal Amount of this Secured Certificate shall be payable in


                                      -4-
<PAGE>

installments on the dates set forth in Schedule I hereto equal to the
corresponding percentage of the Principal Amount of this Secured Certificate set
forth in Schedule I hereto. Accrued but unpaid interest shall be due and payable
in semi-annual installments commencing [March/September 1, _____], and
thereafter on [September 1] and [March 1] of each year, to and including
[____________]. Notwithstanding the foregoing, the final payment made on this
Secured Certificate shall be in an amount sufficient to discharge in full the
unpaid Principal Amount and all accrued and unpaid interest on, and any other
amounts due under, this Secured Certificate. Notwithstanding anything to the
contrary contained herein, if any date on which a payment under this Secured
Certificate becomes due and payable is not a Business Day then such payment
shall not be made on such scheduled date but shall be made on the next
succeeding Business Day and if such payment is made on such next succeeding
Business Day, no interest shall accrue on the amount of such payment during such
extension.

            For purposes hereof, the term "Trust Indenture" means the Trust
Indenture and Security Agreement [NW ____ _], dated as of [_______________],
between the Owner and State Street Bank and Trust Company (the "Indenture
Trustee"), as the same may be amended or supplemented from time to time. All
other capitalized terms used in this Secured Certificate and not defined herein
shall have the respective meanings assigned in the Trust Indenture.

            This Secured Certificate shall bear interest, payable on demand, at
the Past Due Rate (calculated on the basis of a year of 360 days comprised of
twelve 30-day months) on any overdue Principal Amount, any overdue Make-Whole
Amount, if any, and (to the extent permitted by applicable law) any overdue
interest and any other amounts payable hereunder which are overdue, in each case
for the period the same is overdue. Amounts shall be overdue if not paid when
due (whether at stated maturity, by acceleration or otherwise).

            There shall be maintained a Secured Certificate Register for the
purpose of registering transfers and exchanges of Secured Certificates at the
Corporate Trust Office of the Indenture Trustee or at the office of any
successor in the manner provided in Section 2.07 of the Trust Indenture.

            The Principal Amount and interest and other amounts due hereunder
shall be payable in Dollars in immediately available funds at the Corporate
Trust Office of the Indenture Trustee, or as otherwise provided in the Trust
Indenture. Each such payment shall be made on the date such payment is due and
without any presentment or surrender of this Secured Certificate, except that in
the case of any final payment with respect to this Secured Certificate, the
Secured Certificate shall be surrendered promptly thereafter to the Indenture
Trustee for cancellation.

            The holder hereof, by its acceptance of this Secured Certificate,
agrees that, except as provided in the Trust Indenture, each payment received by
it hereunder shall be applied, first, to the payment of accrued interest on this
Secured Certificate (as well as any interest on any overdue Principal Amount,
any overdue Make-Whole Amount, if any, or, to the extent permitted by Law, any
overdue interest and other amounts hereunder) to the date of such payment,
second, to the payment of the Principal Amount of this Secured Certificate then
due,


                                      -5-
<PAGE>

third, to the payment of Make-Whole Amount, if any, and any other amount due
hereunder or under the Trust Indenture, and fourth, the balance, if any,
remaining thereafter, to the payment of Principal Amount of this Secured
Certificate remaining unpaid in the inverse order of their normal maturity.

            This Secured Certificate is one of the Secured Certificates referred
to in the Trust Indenture which have been or are to be issued by the Owner
pursuant to the terms of the Trust Indenture. The Collateral is held by the
Indenture Trustee as security, in part, for the Secured Certificates. The
provisions of this Secured Certificate are subject to the Trust Indenture.
Reference is hereby made to the Trust Indenture and the Participation Agreement
for a complete statement of the rights and obligations of the holder of, and the
nature and extent of the security for, this Secured Certificate and the rights
and obligations of the holders of, and the nature and extent of the security
for, any other Secured Certificates executed and delivered under the Trust
Indenture, as well as for a statement of the terms and conditions of the trust
created by the Trust Indenture, to all of which terms and conditions in the
Trust Indenture and the Participation Agreement each holder hereof agrees by its
acceptance of this Secured Certificate.

            As provided in the Trust Indenture and subject to certain
limitations therein set forth, this Secured Certificate is exchangeable for a
like aggregate Principal Amount of Secured Certificates of different authorized
denominations, as requested by the holder surrendering the same.

            Prior to due presentment for registration of transfer of this
Secured Certificate, the Owner and the Indenture Trustee shall treat the person
in whose name this Secured Certificate is registered as the owner hereof for all
purposes whether or not this Secured Certificate be overdue, and neither of the
Owner nor the Indenture Trustee shall be affected by notice to the contrary.

            This Secured Certificate is subject to redemption as provided in
Sections 2.10, 2.11 and 2.12 of the Trust Indenture but not otherwise. This
Secured Certificate is also subject to assumption by an owner trustee as
provided in Section 2.13 of the Trust Indenture.

            [The indebtedness evidenced by this Secured Certificate is, to the
extent and in the manner provided in the Trust Indenture, subordinate and
subject in right of payment to the prior payment in full of the Secured
Obligations (as defined in the Trust Indenture) in respect of [Series A Secured
Certificates](1) [Series A and Series B Secured Certificates](2), and this
Secured Certificate is issued subject to such provisions. The Certificate Holder
of this Secured Certificate, by accepting the same, (a) agrees to and shall be
bound by such provisions, (b) authorizes and directs the Indenture Trustee on
his behalf to take such action as may be necessary or appropriate to effectuate
the subordination as provided in the Trust Indenture and (c) appoints the

- ----------
1   To be inserted in the case of a Series B Secured Certificate.

2   To be inserted in the case of a Series C Secured Certificate.

**  To be inserted for each Secured Certificate other than any Series A
    Secured Certificate.


                                      -6-
<PAGE>

Indenture Trustee his attorney-in-fact for such purpose.]**

            Unless the certificate of authentication hereon has been executed by
or on behalf of the Indenture Trustee by manual signature, this Secured
Certificate shall not be entitled to any benefit under the Trust Indenture or be
valid or obligatory for any purpose.

            THIS SECURED CERTIFICATE SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK.

                                      * * *

- ----------
**  To be inserted for each Secured Certificate other than any Series A
    Secured Certificate.


                                      -7-
<PAGE>

            IN WITNESS WHEREOF, the Owner has caused this Secured Certificate to
be executed in its corporate name by its officer thereunto duly authorized on
the date hereof.


                                  NORTHWEST AIRLINES, INC.,


                                  By _______________________________________
                                     Name:
                                     Title:

                INDENTURE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

            This is one of the Secured Certificates referred to in the
within-mentioned Trust Indenture.


                                  STATE STREET BANK AND TRUST COMPANY,
                                      not in its individual capacity but solely
                                      as Indenture Trustee


                                  By _______________________________________
                                     Name:
                                     Title:


                                      -8-
<PAGE>

                                   SCHEDULE I

                        SECURED CERTIFICATES AMORTIZATION

                                                 Percentage of
                                               Principal Amount
             Payment Date                         to be Paid
    --------------------------------     ------------------------------


                       [SEE SCHEDULE I TO TRUST INDENTURE
                        WHICH IS INSERTED UPON ISSUANCE]

                                      * * *

            SECTION 2.02. Issuance and Terms of Secured Certificates.

            The Secured Certificates shall be dated the date of issuance
thereof, shall be issued in three separate series consisting of Series A, Series
B and Series C and in the maturities and principal amounts and shall bear
interest as specified in Schedule I hereto. On the Closing Date, each Secured
Certificate shall be issued to the Pass Through Trustees (or their designee)
under the Pass Through Agreements as set forth in Schedule II hereto. The
Secured Certificates shall be issued in registered form only. The Secured
Certificates shall be issued in denominations of $1,000 and integral multiples
thereof, except that one Secured Certificate of each Series may be in an amount
that is not an integral multiple of $1,000.

            Each Secured Certificate shall bear interest at the Debt Rate
(calculated on the basis of a year of 360 days comprised of twelve 30-day
months) on the unpaid Principal Amount thereof from time to time outstanding,
payable in arrears on [March/September 1, ____], and on each [September 1] and
[March 1] thereafter until maturity. The Principal Amount of each Secured
Certificate shall be payable on the dates and in the installments equal to the
corresponding percentage of the Principal Amount as set forth in Schedule I
hereto which shall be attached as Schedule I to the Secured Certificates.
Notwithstanding the foregoing, the final payment made under each Secured
Certificate shall be in an amount sufficient to discharge in full the unpaid
Principal Amount and all accrued and unpaid interest on, and any other amounts
due under, such Secured Certificate. Each Secured Certificate shall bear
interest at the Past Due Rate (calculated on the basis of a year of 360 days
comprised of twelve 30-day months) on any part of the Principal Amount,
Make-Whole Amount, if any, and to the extent permitted by applicable law,
interest and any other amounts payable thereunder not paid when due for any
period during which the same shall be overdue, in each case for the period the
same is overdue. Amounts shall be overdue if not paid when due (whether at
stated maturity, by acceleration or otherwise). Notwithstanding anything to the
contrary contained herein, if any date on which a payment under any Secured
Certificate becomes due and payable is not a Business Day then such payment
shall not be made on such scheduled date but shall be made on the next
succeeding Business Day and if such payment is made on such next succeeding
Business Day, no interest shall accrue on the


                                      -9-
<PAGE>

amount of such payment during such extension.

            The Owner agrees to pay to the Indenture Trustee for distribution in
accordance with Section 3.04 hereof Owner's pro rata share of all amounts owed
to the Liquidity Provider by the Subordination Agent under each Liquidity
Facility other than amounts due as (i) repayments of the principal of advances
thereunder, (ii) interest on Interest Drawings, Final Drawings, and Applied
Downgrade Advances and Applied Non-Extension Advances (as defined in the
Liquidity Facilities) under any Liquidity Facility except to the extent included
in Net Interest and Related Charges, and (iii) fees payable to the Liquidity
Provider payable (whether or not in fact paid) under Section 7(a) of the Note
Purchase Agreement (as originally in effect or amended). As used in this
Section, "Owner's pro rata share" means as of any time:

            (A) with respect to all amounts other than Net Interest and Related
      Charges, a fraction the numerator of which is the aggregate principal
      balance then outstanding of the Secured Certificates and the denominator
      of which is the aggregate principal balance then outstanding of all
      Equipment Notes, plus

            (B) with respect to all Net Interest and Related Charges (x) if
      there exists a Payment Default under any Secured Certificate a fraction,
      the numerator of which is the aggregate principal balance then outstanding
      of the Secured Certificates and the denominator of which is the aggregate
      principal balance then outstanding of all Equipment Notes issued under
      Indentures under which there exists a Payment Default or (y) at all other
      times, zero.

As used in this Section, "Net Interest and Related Charges" means the sum of (i)
the amount, if any, by which interest payable to the Liquidity Provider on any
Interest Drawing, Final Drawing, Applied Downgrade Advance and/or Applied
Non-Extension Advance (as defined in the Liquidity Facilities) exceeds the
amount which would be payable if such drawings bore interest at the Designated
Interest Rate plus (ii) any amounts payable under Section 3.1, Section 3.2,
Section 3.3 or Section 7.7 of each Liquidity Facility (or similar provisions of
any succeeding Liquidity Facility) which result from any Interest Drawing, Final
Drawing, Applied Downgrade Advance or Applied Non-Extension Advance (as defined
in the Liquidity Facilities). As used in this Section "Designated Interest Rate"
means the weighted average Past Due Rate (as defined in the applicable
Indentures) except with respect to that portion of any Final Drawing (or Applied
Downgrade Advance or Applied Non-Extension Advance which becomes a Final
Drawing) which remains in a Cash Collateral Account, Designated Interest Rate
means the weighted average Investment Earnings of funds in the Cash Collateral
Accounts. As used in this Section, a Payment Default when used in connection
with a Secured Certificate or Equipment Note means a default in the payment of
principal thereof or interest thereon which has not been cured other than solely
because of acceleration. The following terms are used in this Section as defined
in the Intercreditor Agreement without regard to any amendment, modification or
supplement thereto after the Closing Date: Cash Collateral Accounts, Equipment
Notes, Final Drawing, Indentures, Interest Drawing and Investment Earnings.

            The Secured Certificates shall be executed on behalf of the Owner by
its President


                                      -10-
<PAGE>

or one of its Vice Presidents, its Treasurer or Assistant Secretaries or other
authorized officer. Secured Certificates bearing the signatures of individuals
who were at any time the proper officers of the Owner shall bind the Owner,
notwithstanding that such individuals or any of them have ceased to hold such
offices prior to the authentication and delivery of such Secured Certificates or
did not hold such offices at the respective dates of such Secured Certificates.
The Owner may from time to time execute and deliver Secured Certificates with
respect to the Aircraft to the Indenture Trustee for authentication upon
original issue and such Secured Certificates shall thereupon be authenticated
and delivered by the Indenture Trustee upon the written request of the Owner
signed by a Vice President, its Treasurer or other authorized officer of the
Owner; provided, however, that each such request shall specify the aggregate
Principal Amount of all Secured Certificates to be authenticated hereunder on
original issue with respect to the Aircraft. No Secured Certificate shall be
secured by or entitled to any benefit under this Trust Indenture or be valid or
obligatory for any purposes, unless there appears on such Secured Certificate a
certificate of authentication in the form provided for herein executed by the
Indenture Trustee by the manual signature of one of its authorized officers and
such certificate upon any Secured Certificates shall be conclusive evidence, and
the only evidence, that such Secured Certificate has been duly authenticated and
delivered hereunder.

            SECTION 2.03. [Intentionally Omitted]

            SECTION 2.04. Method of Payment.

            (a) The Principal Amount of, interest on, Make-Whole Amount, if any,
and other amounts due under each Secured Certificate or hereunder will be
payable in Dollars by wire transfer of immediately available funds not later
than 12:00 noon, New York City time, on the due date of payment to the Indenture
Trustee at the Corporate Trust Office for distribution among the Certificate
Holders in the manner provided herein. The Owner shall not have any
responsibility for the distribution of such payment to any Certificate Holder.
Notwithstanding the foregoing or any provision in any Secured Certificate to the
contrary, the Indenture Trustee will use reasonable efforts to pay or cause to
be paid, if so directed in writing by any Certificate Holder (with a copy to the
Owner), all amounts paid by the Owner hereunder and under such holder's Secured
Certificate or Secured Certificates to such holder or a nominee therefor
(including all amounts distributed pursuant to Article III of this Trust
Indenture) by transferring, or causing to be transferred, by wire transfer of
immediately available funds in Dollars, prior to 2:00 p.m., New York City time,
on the due date of payment, to an account maintained by such holder with a bank
located in the continental United States the amount to be distributed to such
holder, for credit to the account of such holder maintained at such bank. If the
Indenture Trustee shall fail to make any such payment as provided in the
immediately preceding sentence after its receipt of funds at the place and prior
to the time specified above, the Indenture Trustee, in its individual capacity
and not as trustee, agrees to compensate such holders for loss of use of funds
at the Debt Rate until such payment is made and the Indenture Trustee shall be
entitled to any interest earned on such funds until such payment is made. Any
payment made hereunder shall be made without any presentment or surrender of any
Secured Certificate, except that, in the case of the final payment in respect of
any Secured Certificate, such Secured Certificate shall be surrendered to the
Indenture Trustee for cancellation promptly after such payment.


                                      -11-
<PAGE>

Notwithstanding any other provision of this Trust Indenture to the contrary, the
Indenture Trustee shall not be required to make, or cause to be made, wire
transfers as aforesaid prior to the first Business Day on which it is
practicable for the Indenture Trustee to do so in view of the time of day when
the funds to be so transferred were received by it if such funds were received
after 12:00 noon, New York City time, at the place of payment. Prior to the due
presentment for registration of transfer of any Secured Certificate, the Owner
and the Indenture Trustee shall deem and treat the Person in whose name any
Secured Certificate is registered on the Secured Certificate Register as the
absolute owner and holder of such Secured Certificate for the purpose of
receiving payment of all amounts payable with respect to such Secured
Certificate and for all other purposes, and none of the Owner or the Indenture
Trustee shall be affected by any notice to the contrary. So long as any
signatory to the Participation Agreement or nominee thereof shall be a
registered Certificate Holder, all payments to it shall be made to the account
of such Certificate Holder specified in Schedule I thereto and otherwise in the
manner provided in or pursuant to the Participation Agreement unless it shall
have specified some other account or manner of payment by notice to the
Indenture Trustee consistent with this Section 2.04.

            (b) The Indenture Trustee, as agent for the Owner, shall exclude and
withhold at the appropriate rate from each payment of Principal Amount of,
interest on, Make-Whole Amount, if any, and other amounts due hereunder or under
each Secured Certificate (and such exclusion and withholding shall constitute
payment in respect of such Secured Certificate) any and all United States
withholding taxes applicable thereto as required by Law. The Indenture Trustee
agrees to act as such withholding agent and, in connection therewith, whenever
any present or future United States taxes or similar charges are required to be
withheld with respect to any amounts payable hereunder or in respect of the
Secured Certificates, to withhold such amounts (and such withholding shall
constitute payment in respect of such Secured Certificate) and timely pay the
same to the appropriate authority in the name of and on behalf of the
Certificate Holders, that it will file any necessary United States withholding
tax returns or statements when due, and that as promptly as possible after the
payment thereof it will deliver to each Certificate Holder (with a copy to the
Owner) appropriate receipts showing the payment thereof, together with such
additional documentary evidence as any such Certificate Holder may reasonably
request from time to time.

            If a Certificate Holder which is a Non-U.S. Person has furnished to
the Indenture Trustee a properly completed and currently effective U.S. Internal
Revenue Service Form 1001 or W-8 (or such successor form or forms as may be
required by the United States Treasury Department) during the calendar year in
which the payment hereunder or under the Secured Certificate(s) held by such
holder is made (but prior to the making of such payment), or in either of the
two preceding calendar years, and has not notified the Indenture Trustee of the
withdrawal or inaccuracy of such form prior to the date of such payment (and the
Indenture Trustee has no reason to know that any information set forth in such
form is inaccurate), the Indenture Trustee shall withhold only the amount, if
any, required by Law (after taking into account any applicable exemptions
claimed by the Certificate Holder) to be withheld from payments hereunder or
under the Secured Certificates held by such holder in respect of United States
federal income tax (and such withholding shall constitute payment in respect of
such Secured Certificate). If a Certificate Holder (x) which is a Non-U.S.
Person has furnished to the Indenture Trustee a properly


                                      -12-
<PAGE>

completed and currently effective U.S. Internal Revenue Service Form 4224 in
duplicate (or such successor certificate, form or forms as may be required by
the United States Treasury Department as necessary in order to avoid withholding
of United States federal income tax), during the calendar year in which the
payment is made (but prior to the making of such payment), and has not notified
the Indenture Trustee of the withdrawal or inaccuracy of such certificate or
form prior to the date of such payment (and the Indenture Trustee has no reason
to know that any information set forth in such form is inaccurate) or (y) which
is a U.S. Person has furnished to the Indenture Trustee a properly completed and
currently effective U.S. Internal Revenue Service Form W-9, if applicable, prior
to a payment hereunder or under the Secured Certificates held by such holder, no
amount shall be withheld from payments in respect of United States federal
income tax. If any Certificate Holder has notified the Indenture Trustee that
any of the foregoing forms or certificates is withdrawn or inaccurate, or if
such holder has not filed a form claiming an exemption from United States
withholding tax or if the Code or the regulations thereunder or the
administrative interpretation thereof are at any time after the date hereof
amended to require such withholding of United States federal income taxes from
payments under the Secured Certificates held by such holder, the Indenture
Trustee agrees to withhold from each payment due to the relevant Certificate
Holder withholding taxes at the appropriate rate under Law and will, on a timely
basis as more fully provided above, deposit such amounts with an authorized
depository and make such returns, statements, receipts and other documentary
evidence in connection therewith as required by applicable law.

            The Owner shall not have any liability for the failure of the
Indenture Trustee to withhold taxes in the manner provided for herein or if any
Certificate Holder provides false or inaccurate information on any form required
to be delivered under this Section 2.04.

            SECTION 2.05. Application of Payments.

            In the case of each Secured Certificate, each payment of Principal
Amount, Make-Whole Amount, if any, and interest or other amounts due thereon
shall be applied:

            First: to the payment of accrued interest on such Secured
      Certificate (as well as any interest on any overdue Principal Amount, any
      overdue Make-Whole Amount, if any, and to the extent permitted by Law, any
      overdue interest and any other overdue amounts thereunder) to the date of
      such payment;

            Second: to the payment of the Principal Amount of such Secured
      Certificate (or a portion thereof) then due thereunder;

            Third: to the payment of Make-Whole Amount, if any, and any other
      amount due hereunder or under such Secured Certificate; and

            Fourth: the balance, if any, remaining thereafter, to the payment of
      the Principal Amount of such Secured Certificate remaining unpaid
      (provided that such Secured Certificate shall not be subject to redemption
      except as provided in Sections 2.10, 2.11 and 2.12 hereof).


                                      -13-
<PAGE>

The amounts paid pursuant to clause "Fourth" above shall be applied to the
installments of Principal Amount of such Secured Certificate in the inverse
order of their normal maturity.

            SECTION 2.06. Termination of Interest in Collateral.

            A Certificate Holder shall not, as such, have any further interest
in, or other right with respect to, the Collateral when and if the Principal
Amount of, Make-Whole Amount, if any, and interest on and other amounts due
under all Secured Certificates held by such Certificate Holder and all other
sums then payable to such Certificate Holder hereunder and under the other
Operative Documents by the Owner (collectively, the "Secured Obligations") shall
have been paid in full.

            SECTION 2.07. Registration, Transfer and Exchange of Secured
Certificates.

            The Indenture Trustee shall keep a register (the "Secured
Certificate Register") in which the Indenture Trustee shall provide for the
registration of Secured Certificates and the registration of transfers of
Secured Certificates. No such transfer shall be given effect unless and until
registration hereunder shall have occurred. The Secured Certificate Register
shall be kept at the Corporate Trust Office of the Indenture Trustee. The
Indenture Trustee is hereby appointed "Secured Certificate Registrar" for the
purpose of registering Secured Certificates and transfers of Secured
Certificates as herein provided. A holder of any Secured Certificate intending
to exchange such Secured Certificate shall surrender such Secured Certificate to
the Indenture Trustee at the Corporate Trust Office, together with a written
request from the registered holder thereof for the issuance of a new Secured
Certificate, specifying, in the case of a surrender for transfer, the name and
address of the new holder or holders. Upon surrender for registration of
transfer of any Secured Certificate, the Owner shall execute, and the Indenture
Trustee shall authenticate and deliver, in the name of the designated transferee
or transferees, one or more new Secured Certificates of a like aggregate
Principal Amount and of the same series. At the option of the Certificate
Holder, Secured Certificates may be exchanged for other Secured Certificates of
any authorized denominations of a like aggregate Principal Amount, upon
surrender of the Secured Certificates to be exchanged to the Indenture Trustee
at the Corporate Trust Office. Whenever any Secured Certificates are so
surrendered for exchange, the Owner shall execute, and the Indenture Trustee
shall authenticate and deliver, the Secured Certificates which the Certificate
Holder making the exchange is entitled to receive. All Secured Certificates
issued upon any registration of transfer or exchange of Secured Certificates
(whether under this Section 2.07 or under Section 2.08 hereof or otherwise under
this Trust Indenture) shall be the valid obligations of the Owner evidencing the
same respective obligations, and entitled to the same security and benefits
under this Trust Indenture, as the Secured Certificates surrendered upon such
registration of transfer or exchange. Every Secured Certificate presented or
surrendered for registration of transfer, shall (if so required by the Indenture
Trustee) be duly endorsed, or be accompanied by a written instrument of transfer
in form satisfactory to the Indenture Trustee duly executed by the Certificate
Holder or such holder's attorney duly authorized in writing, and the Indenture
Trustee shall require evidence satisfactory to it as to the compliance of any
such transfer with the Securities Act, and the securities Laws of any applicable
state. The Indenture


                                      -14-
<PAGE>

Trustee shall make a notation on each new Secured Certificate of the amount of
all payments of Principal Amount previously made on the old Secured Certificate
or Secured Certificates with respect to which such new Secured Certificate is
issued and the date to which interest on such old Secured Certificate or Secured
Certificates has been paid. Interest shall be deemed to have been paid on such
new Secured Certificate to the date on which interest shall have been paid on
such old Secured Certificate, and all payments of the Principal Amount marked on
such new Secured Certificate, as provided above, shall be deemed to have been
made thereon. The Owner shall not be required to exchange any surrendered
Secured Certificates as provided above during the ten-day period preceding the
due date of any payment on such Secured Certificate. The Owner shall in all
cases deem the Person in whose name any Secured Certificate shall have been
issued and registered as the absolute owner and holder of such Secured
Certificate for the purpose of receiving payment of all amounts payable by the
Owner with respect to such Secured Certificate and for all purposes until a
notice stating otherwise is received from the Indenture Trustee and such change
is reflected on the Secured Certificate Register. The Indenture Trustee will
promptly notify the Owner of each registration of a transfer of a Secured
Certificate. Any such transferee of a Secured Certificate, by its acceptance of
a Secured Certificate, agrees to the provisions of the Participation Agreement
applicable to Certificate Holders, including Sections 6, 8(e), 8(k), 8(l), 8(q),
8(r), 8(t), 8(cc), 10, 13(b), 13(c), 15(b), 15(c) and 16, and shall be deemed to
have represented and warranted (except as provided above), and covenanted, to
the parties to the Participation Agreement as to the matters represented,
warranted and covenanted by the Purchasers in the Participation Agreement.
Subject to compliance by the Certificate Holder and its transferee (if any) of
the requirements set forth in this Section 2.07, the Indenture Trustee and the
Owner shall use all reasonable efforts to issue new Secured Certificates upon
transfer or exchange within 10 Business Days of the date a Secured Certificate
is surrendered for transfer or exchange.

            SECTION 2.08. Mutilated, Destroyed, Lost or Stolen Secured
Certificates.

            If any Secured Certificate shall become mutilated, destroyed, lost
or stolen, the Owner shall, upon the written request of the holder of such
Secured Certificate, execute and the Indenture Trustee shall authenticate and
deliver in replacement thereof a new Secured Certificate, payable in the same
Principal Amount dated the same date and captioned as issued in connection with
the Aircraft. If the Secured Certificate being replaced has become mutilated,
such Secured Certificate shall be surrendered to the Indenture Trustee and a
photocopy thereof shall be furnished to the Owner. If the Secured Certificate
being replaced has been destroyed, lost or stolen, the holder of such Secured
Certificate shall furnish to the Owner and the Indenture Trustee such security
or indemnity as may be required by them to save the Owner and the Indenture
Trustee harmless and evidence satisfactory to the Owner and the Indenture
Trustee of the destruction, loss or theft of such Secured Certificate and of the
ownership thereof. If a "qualified institutional buyer" of the type referred to
in paragraph (a)(l)(i)(A), (B), (D) or (E) of Rule 144A under the Securities Act
(a "QIB") is the holder of any such destroyed, lost or stolen Secured
Certificate, then the written indemnity of such QIB, signed by an authorized
officer thereof, in favor of, delivered to and in form reasonably satisfactory
to the Owner and the Indenture Trustee shall be accepted as satisfactory
indemnity and security and no further indemnity or security shall be required as
a condition to the execution and delivery of such new


                                      -15-
<PAGE>

Secured Certificate. Subject to compliance by the Certificate Holder of the
requirements set forth in this Section 2.08, the Indenture Trustee and the Owner
shall use all reasonable efforts to issue new Secured Certificates within 10
Business Days of the date of the written request therefor from the Certificate
Holder.

            SECTION 2.09. Payment of Expenses on Transfer; Cancellation.

            (a) No service charge shall be made to a Certificate Holder for any
registration of transfer or exchange of Secured Certificates, but the Indenture
Trustee, as Secured Certificate Registrar, may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Secured
Certificates.

            (b) The Indenture Trustee shall cancel all Secured Certificates
surrendered for replacement, redemption, transfer, exchange, payment or
cancellation and shall destroy the canceled Secured Certificates.

            SECTION 2.10. Mandatory Redemptions of Secured Certificates.

            On the date on which the Owner is required pursuant to Section
7.06(a)(i) hereof to make payment for an Event of Loss with respect to the
Aircraft, all of the Secured Certificates shall be redeemed in whole at a
redemption price equal to 100% of the unpaid Principal Amount thereof, together
with all accrued interest thereon to the date of redemption and all other
amounts payable hereunder or under the Participation Agreement to the
Certificate Holders but without Make-Whole Amount.

            SECTION 2.11. Voluntary Redemptions of Secured Certificates.

            Any or all of the Secured Certificates may be redeemed by the Owner
upon at least 30 days' revocable prior written notice to the Indenture Trustee
and the Certificate Holders, and the Secured Certificates shall be redeemed in
whole at a redemption price equal to 100% of the unpaid Principal Amount
thereof, together with accrued interest thereon to the date of redemption and
all other amounts payable hereunder or under the Participation Agreement to the
Certificate Holders plus Make-Whole Amount, if any.

            SECTION 2.12. Redemptions; Notice of Redemption.

            (a) No redemption of any Secured Certificate may be made except to
the extent and in the manner expressly permitted by this Trust Indenture. No
purchase of any Secured Certificate may be made by the Indenture Trustee.

            (b) Notice of redemption with respect to the Secured Certificates
shall be given by the Indenture Trustee by first-class mail, postage prepaid,
mailed not less than 15 nor more than 60 days prior to the applicable redemption
date, to each Certificate Holder of such Secured Certificates to be redeemed, at
such Certificate Holder's address appearing in the Secured Certificate Register;
provided that, in the case of a redemption to be made pursuant to Section


                                      -16-
<PAGE>

2.11, such notice shall be revocable and shall be deemed revoked if the
Indenture Trustee receives written notice of such revocation from the Owner not
later than three days prior to the redemption date. All notices of redemption
shall state: (1) the redemption date, (2) the applicable basis for determining
the redemption price, (3) that on the redemption date, the redemption price will
become due and payable upon each such Secured Certificate, and that, if any such
Secured Certificates are then outstanding, interest on such Secured Certificates
shall cease to accrue on and after such redemption date, and (4) the place or
places where such Secured Certificates are to be surrendered for payment of the
redemption price.

            (c) On or before the redemption date, the Owner (or any person on
behalf of the Owner) shall, to the extent an amount equal to the redemption
price for the Secured Certificates to be redeemed on the redemption date shall
not then be held in the Collateral, deposit or cause to be deposited with the
Indenture Trustee by 12:00 noon on the redemption date in immediately available
funds the redemption price of the Secured Certificates to be redeemed.

            (d) Notice of redemption having been given as aforesaid (and not
deemed revoked as contemplated in the proviso to Section 2.12(b)), the Secured
Certificates to be redeemed shall, on the redemption date, become due and
payable at the Corporate Trust Office of the Indenture Trustee or at any office
or agency maintained for such purposes pursuant to Section 2.07, and from and
after such redemption date (unless there shall be a default in the payment of
the redemption price) any such Secured Certificates then outstanding shall cease
to bear interest. Upon surrender of any such Secured Certificate for redemption
in accordance with said notice, such Secured Certificate shall be redeemed at
the redemption price. If any Secured Certificate called for redemption shall not
be so paid upon surrender thereof for redemption, the Principal Amount thereof
shall, until paid, continue to bear interest from the applicable redemption date
at the interest rate in effect for such Secured Certificate as of such
redemption date.

            SECTION 2.13. Assumption of Secured Certificates.

            Pursuant to the provisions of Section 16 of the Participation
Agreement, an owner trustee shall be entitled to assume on a non-recourse basis
all of the obligations of the Owner hereunder and under the Secured Certificates
by an amended and restated trust indenture, an amended and restated
participation agreement, and the issuance of new secured certificates having
substantially the same tenor as the Secured Certificates. If an owner trustee
shall assume such obligations of the Owner, the Owner shall be released and
discharged from any further obligations hereunder and under the Secured
Certificates (except with respect to any such obligations that accrued prior
thereto) and the Secured Certificates shall be delivered to the Indenture
Trustee for cancellation.

            SECTION 2.14. [Intentionally Omitted]

            SECTION 2.15. Subordination.

            (a) The Owner and, by acceptance of its Secured Certificates of any
Series, each Certificate Holder of such Series, hereby agree that no payment or
distribution shall be made on or in respect of the Secured Obligations owed to
such Certificate Holder of such Series, including


                                      -17-
<PAGE>

any payment or distribution of cash, property or securities after the
commencement of a proceeding of the type referred to in Section 4.01(e) or (f)
hereof, except as expressly provided in Article III hereof.

            (b) By the acceptance of its Secured Certificates of any Series
(other than Series A), each Certificate Holder of such Series agrees that in the
event that such Certificate Holder, in its capacity as a Certificate Holder,
shall receive any payment or distribution on any Secured Obligations in respect
of such Series which it is not entitled to receive under this Section 2.15 or
Article III hereof, it will hold any amount so received in trust for the Senior
Holder (as defined in Section 2.15(c) hereof) and will forthwith turn over such
payment to the Indenture Trustee in the form received to be applied as provided
in Article III hereof.

            (c) As used in this Section 2.15, the term "Senior Holder" shall
mean, (i) the Certificate Holders of Series A until the Secured Obligations in
respect of Series A Secured Certificates have been paid in full and (ii) after
the Secured Obligations in respect of Series A Secured Certificates have been
paid in full, the Certificate Holders of Series B until the Secured Obligations
in respect of Series B Secured Certificates have been paid in full.

                                   ARTICLE III

                RECEIPT, DISTRIBUTION AND APPLICATION OF PAYMENTS

            SECTION 3.01. Basic Distributions.

            Except as otherwise provided in Section 3.03 hereof, each periodic
payment of principal or interest on the Secured Certificates received by the
Indenture Trustee shall be promptly distributed in the following order of
priority:

            (i)   so much of such payment as shall be required to pay in full
                  the aggregate amount of the payment or payments of Principal
                  Amount and interest and other amounts (as well as any interest
                  on any overdue Principal Amount and, to the extent permitted
                  by applicable law, on any overdue interest and any other
                  overdue amounts) then due under all Series A Secured
                  Certificates shall be distributed to the Certificate Holders
                  of Series A ratably, without priority of one over the other,
                  in the proportion that the amount of such payment or payments
                  then due under each Series A Secured Certificate bears to the
                  aggregate amount of the payments then due under all Series A
                  Secured Certificates;

            (ii)  after giving effect to paragraph (i) above, so much of such
                  payment remaining as shall be required to pay in full the
                  aggregate amount of the payment or payments of Principal
                  Amount and interest and other amounts (as well as any interest
                  on any overdue Principal Amount and, to the extent permitted
                  by applicable law, on any overdue interest and any other
                  overdue amounts) then due under all Series B Secured
                  Certificates shall be


                                      -18-
<PAGE>

                  distributed to the Certificate Holders of Series B ratably,
                  without priority of one over the other, in the proportion that
                  the amount of such payment or payments then due under each
                  Series B Secured Certificate bears to the aggregate amount of
                  the payments then due under all Series B Secured Certificates;
                  and

            (iii) after giving effect to paragraph (ii) above, so much of such
                  payment remaining as shall be required to pay in full the
                  aggregate amount of the payment or payments of Principal
                  Amount and interest and other amounts (as well as any interest
                  on any overdue Principal Amount and, to the extent permitted
                  by applicable law, on any overdue interest and any other
                  overdue amounts) then due under all Series C Secured
                  Certificates shall be distributed to the Certificate Holders
                  of Series C ratably, without priority of one over the other,
                  in the proportion that the amount of such payment or payments
                  then due under each Series C Secured Certificate bears to the
                  aggregate amount of the payments then due under all Series C
                  Secured Certificates.

            SECTION 3.02. Event of Loss; Replacement; Optional Redemption.

            Except as otherwise provided in Section 3.03 hereof, any payments
received by the Indenture Trustee (i) with respect to the Aircraft as the result
of an Event of Loss or (ii) pursuant to the optional redemption of the Secured
Certificates pursuant to Section 2.11 hereof shall be applied to redemption of
the Secured Certificates and to all other amounts payable hereunder or to the
Indenture Trustee or any Certificate Holder under the Participation Agreement by
applying such funds in the following order of priority:

First,      (a) to reimburse the Indenture Trustee and the Certificate Holders
            for any reasonable costs or expenses incurred in connection with
            such redemption for which they are entitled to reimbursement, or
            indemnity by the Owner, under the Operative Documents and then (b)
            to pay any other amounts then due to the Indenture Trustee and the
            Certificate Holders under this Trust Indenture, the Participation
            Agreement or the Secured Certificates (other than amounts specified
            in clause Second below);

Second,     (i)   to pay the amounts specified in paragraph (i) of clause
                  "Third" of Section 3.03 hereof plus Make-Whole Amount, if any,
                  then due and payable in respect of the Series A Secured
                  Certificates;

            (ii)  after giving effect to paragraph (i) above, to pay the amounts
                  specified in paragraph (ii) of clause "Third" of Section 3.03
                  hereof plus Make-Whole Amount, if any, then due and payable in
                  respect of the Series B Secured Certificates; and

            (iii) after giving effect to paragraph (ii) above, to pay the
                  amounts specified in paragraph (iii) of clause "Third" of
                  Section 3.03 hereof plus Make-Whole


                                      -19-
<PAGE>

                  Amount, if any, then due and payable in respect of the Series
                  C Secured Certificates; and

Third,      as provided in clause "Fourth" of Section 3.03 hereof;

provided, however, that if a Replacement Airframe or Replacement Engine shall be
substituted for the Airframe or Engine subject to such Event of Loss as provided
in accordance with Section 7.06 hereof, any insurance, condemnation or similar
proceeds which result from such Event of Loss and are paid over to the Indenture
Trustee shall be held by the Indenture Trustee as permitted by Section 6.04
hereof (provided that such moneys shall be invested as provided in Section 5.06
hereof) as additional security for the obligations of the Owner under the
Operative Documents and such proceeds (and such investment earnings), to the
extent not theretofore applied as provided herein, shall be released to the
Owner at the Owner's written request upon the release of such damaged Airframe
or Engine and the replacement thereof as provided herein.

            SECTION 3.03. Payments After Event of Default.

            Except as otherwise provided in Section 3.04 hereof, all payments
received and amounts held or realized by the Indenture Trustee (including any
amounts realized by the Indenture Trustee from the exercise of any remedies
pursuant to Article IV hereof) after both an Event of Default shall have
occurred and be continuing and the Secured Certificates shall have become due
and payable pursuant to Section 4.02(b) hereof, as well as all payments or
amounts then held by the Indenture Trustee as part of the Collateral, shall be
promptly distributed by the Indenture Trustee in the following order of
priority:

First,      so much of such payments or amounts as shall be required to
            reimburse the Indenture Trustee for any tax, expense or other loss
            (including, without limitation, all amounts to be expended at the
            expense of, or charged upon the tolls, rents, revenues, issues,
            products and profits of, the property included in the Collateral
            (all such property being herein called the "Mortgaged Property")
            pursuant to Section 4.03(b) hereof) incurred by the Indenture
            Trustee (to the extent not previously reimbursed), the expenses of
            any sale, taking or other proceeding, reasonable attorneys' fees and
            expenses, court costs, and any other expenditures incurred or
            expenditures or advances made by the Indenture Trustee or the
            Certificate Holders in the protection, exercise or enforcement of
            any right, power or remedy or any damages sustained by the Indenture
            Trustee or any Certificate Holder, liquidated or otherwise, upon
            such Event of Default shall be applied by the Indenture Trustee as
            between itself and the Certificate Holders in reimbursement of such
            expenses and any other expenses for which the Indenture Trustee or
            the Certificate Holders are entitled to reimbursement under any
            Operative Document and in the case the aggregate amount to be so
            distributed is insufficient to pay as aforesaid, then ratably,
            without priority of one over the other, in proportion to the amounts
            owed each hereunder;

Second,     so much of such payments or amounts remaining as shall be required
            to reimburse the then existing or prior Certificate Holders for
            payments made pursuant to


                                      -20-
<PAGE>

            Section 5.03 hereof (to the extent not previously reimbursed) shall
            be distributed to such then existing or prior Certificate Holders
            ratably, without priority of one over the other, in accordance with
            the amount of the payment or payments made by each such then
            existing or prior Certificate Holder pursuant to said Section 5.03
            hereof;

Third,      (i)   so much of such payments or amounts remaining as shall be
                  required to pay in full the aggregate unpaid Principal Amount
                  of all Series A Secured Certificates, and the accrued but
                  unpaid interest and other amounts due thereon and all other
                  Secured Obligations in respect of the Series A Secured
                  Certificates to the date of distribution, shall be distributed
                  to the Certificate Holders of Series A, and in case the
                  aggregate amount so to be distributed shall be insufficient to
                  pay in full as aforesaid, then ratably, without priority of
                  one over the other, in the proportion that the aggregate
                  unpaid Principal Amount of all Series A Secured Certificates
                  held by each holder plus the accrued but unpaid interest and
                  other amounts due hereunder or thereunder to the date of
                  distribution, bears to the aggregate unpaid Principal Amount
                  of all Series A Secured Certificates held by all such holders
                  plus the accrued but unpaid interest and other amounts due
                  thereon to the date of distribution;

            (ii)  after giving effect to paragraph (i) above, so much of such
                  payments or amounts remaining as shall be required to pay in
                  full the aggregate unpaid Principal Amount of all Series B
                  Secured Certificates, and the accrued but unpaid interest and
                  other amounts due thereon and all other Secured Obligations in
                  respect of the Series B Secured Certificates to the date of
                  distribution, shall be distributed to the Certificate Holders
                  of Series B, and in case the aggregate amount so to be
                  distributed shall be insufficient to pay in full as aforesaid,
                  then ratably, without priority of one over the other, in the
                  proportion that the aggregate unpaid Principal Amount of all
                  Series B Secured Certificates held by each holder plus the
                  accrued but unpaid interest and other amounts due hereunder or
                  thereunder to the date of distribution, bears to the aggregate
                  unpaid Principal Amount of all Series B Secured Certificates
                  held by all such holders plus the accrued but unpaid interest
                  and other amounts due thereon to the date of distribution; and

            (iii) after giving effect to paragraph (ii) above, so much of such
                  payments or amounts remaining as shall be required to pay in
                  full the aggregate unpaid Principal Amount of all Series C
                  Secured Certificates, and the accrued but unpaid interest and
                  other amounts due thereon and all other Secured Obligations in
                  respect of the Series C Secured Certificates to the date of
                  distribution, shall be distributed to the Certificate Holders
                  of Series C, and in case the aggregate amount so to be
                  distributed shall be insufficient to pay in full as aforesaid,
                  then ratably, without priority of one over the other, in the
                  proportion that the aggregate unpaid Principal Amount of all
                  Series C Secured Certificates held by each holder plus the
                  accrued but unpaid interest and other amounts due hereunder or
                  thereunder to the date of distribution, bears to the aggregate
                  unpaid Principal Amount of all Series


                                      -21-
<PAGE>

                  C Secured Certificates held by all such holders plus the
                  accrued but unpaid interest and other amounts due thereon to
                  the date of distribution; and

Fourth,     the balance, if any, of such payments or amounts remaining
            thereafter shall be distributed to the Owner.

            No Make-Whole Amount shall be due and payable on the Secured
Certificates as a consequence of the acceleration of the Secured Certificates.

            SECTION 3.04. Certain Payments.

            (a) Any payments received by the Indenture Trustee for which no
provision as to the application thereof is made in this Trust Indenture and for
which such provision is made in the Participation Agreement or any other
Operative Document shall be applied forthwith to the purpose for which such
payment was made in accordance with the terms of the Participation Agreement or
such other Operative Document, as the case may be.

            (b) The Indenture Trustee will distribute promptly upon receipt any
indemnity payment received by it from the Owner in respect of (i) the Indenture
Trustee in its individual capacity, (ii) any Certificate Holder, (iii) the
Subordination Agent, (iv) the Liquidity Provider, and (v) the Pass Through
Trustees, in each case pursuant to Section 7 of the Participation Agreement,
directly to the Person entitled thereto. Any payment received by the Indenture
Trustee under the third paragraph of Section 2.02 shall be distributed to the
Subordination Agent to be distributed in accordance with the terms of the
Intercreditor Agreement.

            SECTION 3.05. Other Payments.

            Any payments received by the Indenture Trustee for which no
provision as to the application thereof is made in the Participation Agreement,
elsewhere in this Trust Indenture or in any other Operative Document shall be
distributed by the Indenture Trustee to the extent received or realized at any
time in the order of priority specified in Section 3.01 hereof and after payment
in full of all amounts then due in accordance with Section 3.01 hereof, in the
manner provided in clause "Fourth" of Section 3.03 hereof.

            SECTION 3.06. Payments to the Owner.

            Any amounts distributed hereunder by the Indenture Trustee to the
Owner shall be paid to the Owner (within the time limits contemplated by Section
2.04(a)) by wire transfer of funds of the type received by the Indenture Trustee
at such office and to such account or accounts of such entity or entities as
shall be designated by notice from the Owner to the Indenture Trustee from time
to time.

            SECTION 3.07. Application of Payments Under Guarantee.


                                      -22-
<PAGE>

            All payments received by the Indenture Trustee pursuant to the
Guarantee shall be distributed forthwith by the Indenture Trustee in the same
order of priority, and in the same manner, as it would have distributed the
payment in respect of which such payment under the Guarantee was received.

                                   ARTICLE IV

                EVENTS OF DEFAULT; REMEDIES OF INDENTURE TRUSTEE

            SECTION 4.01. Event of Default.

            "Event of Default" means any of the following events (whatever the
reason for such Event of Default and whether such event shall be voluntary or
involuntary or come about or be effected by operation of Law or pursuant to or
in compliance with any judgment, decree or order of any court or any order, rule
or regulation of any administrative or governmental body):

                  (a) the failure of the Owner to pay (i) Principal Amount of,
            interest on, or Make-Whole Amount, under any Secured Certificate
            when due, and such failure shall have continued unremedied for a
            period of ten (10) Business Days, or (ii) any other amount payable
            by it to the Certificate Holders under this Trust Indenture (other
            than any such failure arising by virtue of a tax withheld pursuant
            to Section 2.04(b) hereof) or under the Participation Agreement, and
            such failure shall have continued unremedied for ten (10) Business
            Days after receipt by the Owner of written demand therefor from the
            Indenture Trustee or any Certificate Holder; or

                  (b) the Owner shall fail to carry and maintain, or cause to be
            carried and maintained, insurance on and in respect of the Aircraft
            in accordance with the provisions of Section 7.04; or

                  (c) the Owner shall fail to observe or perform (or caused to
            be observed or performed), in any material respect, any covenant or
            agreement to be performed or observed by it under any Operative
            Document, and such failure shall continue unremedied for a period of
            thirty (30) days after receipt by the Owner of written notice
            thereof from the Indenture Trustee provided, however, that if the
            Owner shall have undertaken to cure any such failure which arises
            under clause (ii) or clause (iii) of the first sentence of Section
            7.02(a), or under the second sentence of Section 7.02(a) as it
            relates to maintenance, service, repair or overhaul or under Section
            7.03 and, notwithstanding the diligence of the Owner in attempting
            to cure such failure, such failure is not cured within said thirty
            day period but is curable with future due diligence, there shall
            exist no Event of Default under this Section 4.01 so long as the
            Owner is proceeding with due diligence to cure such failure and such
            failure is remedied not later than three hundred sixty-five (365)
            days after receipt by the Owner of such written notice; or


                                      -23-
<PAGE>

                  (d) any representation or warranty made by the Owner herein or
            in the Participation Agreement or any document or certificate
            furnished by the Owner in connection herewith or therewith or
            pursuant hereto or thereto (except the representations and
            warranties set forth in the Pass Through Trust Agreement, the
            Underwriting Agreement or the Note Purchase Agreement or any
            document or instrument furnished pursuant to any thereof) shall
            prove to have been incorrect in any material respect at the time
            made and such incorrectness shall not have been cured (to the extent
            of the adverse impact of such incorrectness on the interests of the
            Indenture Trustee or the Certificate Holders) within thirty (30)
            days after the receipt by the Owner of a written notice from the
            Indenture Trustee advising the Owner of the existence of such
            incorrectness; or

                  (e) the commencement of an involuntary case or other
            proceeding in respect of the Owner in an involuntary case under the
            federal bankruptcy laws, as now or hereafter constituted, or any
            other applicable federal or state bankruptcy, insolvency or other
            similar law in the United States or seeking the appointment of a
            receiver, liquidator, assignee, custodian, trustee, sequestrator (or
            similar official) of the Owner or for all or substantially all of
            its property, or seeking the winding-up or liquidation of its
            affairs and the continuation of any such case or other proceeding
            undismissed and unstayed for a period of ninety (90) consecutive
            days or an order, judgment or decree shall be entered in any
            proceeding by any court of competent jurisdiction appointing,
            without the consent of the Owner, a receiver, trustee or liquidator
            of the Owner, or of any substantial part of its property, or
            sequestering any substantial part of the property of the Owner and
            any such order, judgment or decree or appointment or sequestration
            shall be final or shall remain in force undismissed, unstayed or
            unvacated for a period of ninety (90) days after the date of entry
            thereof; or

                  (f) the commencement by the Owner of a voluntary case under
            the federal bankruptcy laws, as now constituted or hereafter
            amended, or any other applicable federal or state bankruptcy,
            insolvency or other similar law in the United States, or the consent
            by the Owner to the appointment of or taking possession by a
            receiver, liquidator, assignee, trustee, custodian, sequestrator (or
            other similar official) of the Owner or for all or substantially all
            of its property, or the making by the Owner of any assignment for
            the benefit of creditors, or the Owner shall take any corporate
            action to authorize any of the foregoing.

provided, however, that, notwithstanding anything to the contrary contained in
this Section 4.01, any failure of the Owner to perform or observe any covenant,
condition, agreement or any error in a representation or warranty shall not
constitute an Event of Default if such failure or error is caused solely by
reason of an event that constitutes an Event of Loss so long as the Owner is
continuing to comply with all of the terms of Section 7.06 hereof.

            SECTION 4.02. Remedies.


                                      -24-
<PAGE>

            (a) If an Event of Default shall have occurred and be continuing and
so long as the same shall continue unremedied, then in every such case, the
Indenture Trustee may do one or more of the following, to the extent permitted
by, and subject to compliance with any mandatory requirements of, applicable law
then in effect; provided, however, that during any period the Aircraft is
subject to the Civil Reserve Air Fleet Program in accordance with the provisions
of Section 7.02(b) hereof and in possession of the United States Government or
an agency or instrumentality of the United States, the Indenture Trustee shall
not, on account of any Event of Default, be entitled to do any of the following
in such manner as to limit the Owner's control under this Trust Indenture (or
any Lessee's control under any Lease) of any Airframe or any Engines installed
thereon, unless at least sixty (60) days' (or such lesser period as may then be
applicable under the Air Mobility Command program of the United States
Government) written notice of default hereunder shall have been given by the
Indenture Trustee by registered or certified mail to the Owner (and any Lessee)
with a copy addressed to the Contracting Office Representative for the Air
Mobility Command of the United States Air Force under any contract with the
Owner (or any Lessee) relating to the Aircraft; provided further, that the
Indenture Trustee shall give the Owner twenty (20) days' prior written notice of
its intention to sell the Aircraft:

            subject to the provisions of the Granting Clause hereof:

                  (i) cause the Owner upon the written demand of the Indenture
            Trustee and at the Owner's expense, to deliver promptly, and the
            Owner shall deliver promptly, the Airframe or any Engine as the
            Indenture Trustee may so demand to the Indenture Trustee;

                  (ii) sell the Airframe and/or any Engine at public or private
            sale, whether or not the Indenture Trustee shall at the time have
            possession thereof, as the Indenture Trustee may determine, or lease
            or otherwise dispose of, all or any part of the Airframe or any
            Engine as the Indenture Trustee, in its sole discretion, may
            determine, all free and clear of any rights of the Owner, except as
            hereinafter set forth in this Section 4.02; or

                  (iii) exercise any or all of the rights and powers and pursue
            any and all remedies of a secured party under the Uniform Commercial
            Code of the State of New York.

            (b) If an Event of Default shall have occurred and be continuing,
then and in every such case the Indenture Trustee may (and shall, upon receipt
of a written demand therefor from a Majority in Interest of Certificate Holders)
at any time, by delivery of written notice or notices to the Owner, declare all
the Secured Certificates to be due and payable, whereupon the unpaid Principal
Amount of all Secured Certificates then outstanding, together with accrued but
unpaid interest thereon (without Make-Whole Amount) and other amounts due
thereunder, shall immediately become due and payable without presentment,
demand, protest or notice, all of which are hereby waived.


                                      -25-
<PAGE>

            This Section 4.02(b), however, is subject to the condition that, if
at any time after the Principal Amount of the Secured Certificates shall have
become so due and payable, and before any judgment or decree for the payment of
the money so due, or any thereof, shall be entered, all overdue payments of
interest upon the Secured Certificates and all other amounts payable under the
Secured Certificates (except the Principal Amount of the Secured Certificates
which by such declaration shall have become payable) shall have been duly paid,
and every other Default and Event of Default with respect to any covenant or
provision of this Trust Indenture shall have been cured, then and in every such
case a Majority in Interest of Certificate Holders may (but shall not be
obligated to), by written instrument filed with the Indenture Trustee, rescind
and annul the Indenture Trustee's declaration and its consequences; but no such
rescission or annulment shall extend to or affect any subsequent Default or
Event of Default or impair any right consequent thereon.

            (c) Any Certificate Holder shall be entitled, at any sale pursuant
to this Section 4.02, to credit against any purchase price bid at such sale by
such holder all or any part of the unpaid obligations owing to such Certificate
Holder and secured by the Lien of this Trust Indenture (but only to the extent
that such purchase price would have been paid to such Certificate Holder
pursuant to Article III hereof if such purchase price were paid in cash and the
foregoing provisions of this subsection (c) were not given effect).

            (d) In the event of any sale of the Collateral, or any part thereof,
pursuant to any judgment or decree of any court or otherwise in connection with
the enforcement of any of the terms of this Trust Indenture, the unpaid
Principal Amount of all Secured Certificates then outstanding, together with
accrued interest thereon, and other amounts due thereunder, shall immediately
become due and payable without presentment, demand, protest or notice, all of
which are hereby waived.

            (e) Notwithstanding anything contained herein, so long as the Pass
Through Trustee under any Pass Through Trust Agreement or the Subordination
Agent on its behalf is a Certificate Holder, the Indenture Trustee will not be
authorized or empowered to acquire title to any Mortgaged Property or take any
action with respect to any Mortgaged Property so acquired by it if such
acquisition or action would cause any Pass Through Trust to fail to qualify as a
"grantor trust" for federal income tax purposes.

            SECTION 4.03. Return of Aircraft, Etc.

            (a) If an Event of Default shall have occurred and be continuing and
the Secured Certificates have been accelerated, subject to Section 4.02 hereof,
at the request of the Indenture Trustee, the Owner shall promptly execute and
deliver to the Indenture Trustee such instruments of title and other documents
as the Indenture Trustee may deem necessary or advisable to enable the Indenture
Trustee or an agent or representative designated by the Indenture Trustee, at
such time or times and place or places as the Indenture Trustee may specify, to
obtain possession of all or any part of the Mortgaged Property included in the
Collateral to which the Indenture Trustee shall at the time be entitled
hereunder. If the Owner shall for any reason fail to execute and deliver such
instruments and documents after such request by the Indenture Trustee, the


                                      -26-
<PAGE>

Indenture Trustee may (i) obtain a judgment conferring on the Indenture Trustee
the right to immediate possession and requiring the Owner to execute and deliver
such instruments and documents to the Indenture Trustee, to the entry of which
judgment the Owner hereby specifically consents to the fullest extent permitted
by applicable law, and (ii) pursue all or part of such Mortgaged Property
wherever it may be found and may enter any of the premises of the Owner wherever
such Mortgaged Property may be or be supposed to be and search for such
Mortgaged Property and take possession of and remove such Mortgaged Property.
All expenses of obtaining such judgment or of pursuing, searching for and taking
such property shall, until paid, be secured by the Lien of this Trust Indenture.

            (b) Upon every such taking of possession, the Indenture Trustee may,
from time to time, at the expense of the Mortgaged Property, make all such
expenditures for maintenance, use, operation, storage, insurance, leasing,
control, management, disposition, modifications or alterations to and of the
Mortgaged Property, as it may deem proper. In each such case, the Indenture
Trustee shall have the right to maintain, use, operate, store, insure, lease,
control, manage, dispose of, modify or alter the Mortgaged Property and to carry
on the business and to exercise all rights and powers of the Owner relating to
the Mortgaged Property, as the Indenture Trustee shall deem best, including the
right to enter into any and all such agreements with respect to the maintenance,
use, operation, storage, insurance, leasing, control, management, disposition,
modification or alteration of the Mortgaged Property or any part thereof as the
Indenture Trustee may determine, and the Indenture Trustee shall be entitled to
collect and receive directly all tolls, rents, revenues, issues, income,
products and profits of the Mortgaged Property and every part thereof, without
prejudice, however, to the right of the Indenture Trustee under any provision of
this Trust Indenture to collect and receive all cash held by, or required to be
deposited with, the Indenture Trustee hereunder. Such tolls, rents, revenues,
issues, income, products and profits shall be applied to pay the expenses of the
maintenance, use, operation, storage, insurance, leasing, control, management,
disposition, improvement, modification or alteration of the Mortgaged Property
and of conducting the business thereof, and to make all payments which the
Indenture Trustee may be required or may elect to make, if any, for taxes,
assessments, insurance or other proper charges upon the Mortgaged Property or
any part thereof (including the employment of engineers and accountants to
examine, inspect and make reports upon the properties and books and records of
the Owner), and all other payments which the Indenture Trustee may be required
or authorized to make under any provision of this Trust Indenture, as well as
just and reasonable compensation for the services of the Indenture Trustee, and
of all persons properly engaged and employed by the Indenture Trustee with
respect hereto.

            SECTION 4.04. Remedies Cumulative.

            Each and every right, power and remedy given to the Indenture
Trustee specifically or otherwise in this Trust Indenture shall be cumulative
and shall be in addition to every other right, power and remedy herein
specifically given or now or hereafter existing at law, in equity or by statute,
and each and every right, power and remedy whether specifically herein given or
otherwise existing may be exercised from time to time and as often and in such
order as may be deemed expedient by the Indenture Trustee, and the exercise or
the beginning of the exercise of any power or remedy shall not be construed to
be a waiver of the right to exercise at


                                      -27-
<PAGE>

the same time or thereafter any other right, power or remedy. No delay or
omission by the Indenture Trustee in the exercise of any right, remedy or power
or in the pursuance of any remedy shall impair any such right, power or remedy
or be construed to be a waiver of any default on the part of the Owner or to be
an acquiescence therein.

            SECTION 4.05. Discontinuance of Proceedings.

            In case the Indenture Trustee shall have instituted any proceeding
to enforce any right, power or remedy under this Trust Indenture by foreclosure,
entry or otherwise, and such proceedings shall have been discontinued or
abandoned for any reason or shall have been determined adversely to the
Indenture Trustee, then and in every such case the Owner and the Indenture
Trustee shall, subject to any determination in such proceedings, be restored to
their former positions and rights hereunder with respect to the Mortgaged
Property, and all rights, remedies and powers of the Owner or the Indenture
Trustee shall continue as if no such proceedings had been instituted.

            SECTION 4.06. Waiver of Past Defaults.

            Upon written instruction from a Majority in Interest of Certificate
Holders, the Indenture Trustee shall waive any past Default hereunder and its
consequences and upon any such waiver such Default shall cease to exist and any
Event of Default arising therefrom shall be deemed to have been cured for every
purpose of this Trust Indenture, but no such waiver shall extend to any
subsequent or other Default or impair any right consequent thereon; provided,
that in the absence of written instructions from all the Certificate Holders,
the Indenture Trustee shall not waive any Default (i) in the payment of the
Principal Amount, Make-Whole Amount, if any, and interest and other amounts due
under any Secured Certificate then outstanding, or (ii) in respect of a covenant
or provision hereof which, under Article X hereof, cannot be modified or amended
without the consent of each Certificate Holder.

            SECTION 4.07. Appointment of Receiver.

            The Indenture Trustee shall, as a matter of right, be entitled to
the appointment of a receiver (who may be the Indenture Trustee or any successor
or nominee thereof) for all or any part of the Mortgaged Property, whether such
receivership be incidental to a proposed sale of the Mortgaged Property or the
taking of possession thereof or otherwise, and the Owner hereby consents to the
appointment of such a receiver and will not oppose any such appointment. Any
receiver appointed for all or any part of the Mortgaged Property shall be
entitled to exercise all the rights and powers of the Indenture Trustee with
respect to the Mortgaged Property.

            SECTION 4.08. Indenture Trustee Authorized to Execute Bills of Sale,
Etc.

            The Owner irrevocably appoints the Indenture Trustee the true and
lawful attorney-in-fact of the Owner in its name and stead and on its behalf,
for the purpose, if an Event of Default shall have occurred and be continuing,
of effectuating any sale, assignment, transfer or delivery for the enforcement
of the Lien of this Trust Indenture, whether pursuant to foreclosure or power of
sale, assignments and other instruments as may be necessary or appropriate, with
full


                                      -28-
<PAGE>

power of substitution, the Owner hereby ratifying and confirming all that such
attorney or any substitute shall do by virtue hereof in accordance with
applicable law. Nevertheless, if so requested by the Indenture Trustee or any
purchaser, the Owner shall ratify and confirm any such sale, assignment,
transfer or delivery, by executing and delivering to the Indenture Trustee or
such purchaser all bills of sale, assignments, releases and other proper
instruments to effect such ratification and confirmation as may be designated in
any such request.

            SECTION 4.09. Rights of Certificate Holders to Receive Payment.

            Notwithstanding any other provision of this Trust Indenture, the
right of any Certificate Holder to receive payment of principal of, and premium,
if any, and interest on a Secured Certificate on or after the respective due
dates expressed in such Secured Certificate, or to bring suit for the
enforcement of any such payment on or after such respective dates in accordance
with the terms hereof, shall not be impaired or affected without the consent of
such Certificate Holder.

                                    ARTICLE V

                         DUTIES OF THE INDENTURE TRUSTEE

            SECTION 5.01. Notice of Event of Default.

            If the Indenture Trustee shall have Actual Knowledge of an Event of
Default or of a Default arising from a failure to pay any payment of Principal
Amount of, interest on, Make-Whole Amount, if any, due and payable under any
Secured Certificates, the Indenture Trustee shall give prompt written notice
thereof to the Owner and each Certificate Holder. Subject to the terms of
Sections 4.02, 4.06, 5.02 and 5.03 hereof, the Indenture Trustee shall take such
action, or refrain from taking such action, with respect to such Event of
Default or Default (including with respect to the exercise of any rights or
remedies hereunder) as the Indenture Trustee shall be instructed in writing by a
Majority in Interest of Certificate Holders. Subject to the provisions of
Section 5.03, if the Indenture Trustee shall not have received instructions as
above provided within twenty (20) days after mailing notice of such Event of
Default to the Certificate Holders the Indenture Trustee may, subject to
instructions thereafter received pursuant to the preceding provisions of this
Section 5.01, take such action, or refrain from taking such action, but shall be
under no duty to take or refrain from taking any action, with respect to such
Event of Default or Default as it shall determine advisable in the best
interests of the Certificate Holders; provided, however, that the Indenture
Trustee may not sell the Aircraft or any Engine without the consent of a
Majority in Interest of Certificate Holders. For all purposes of this Trust
Indenture, in the absence of Actual Knowledge on the part of the Indenture
Trustee, the Indenture Trustee shall not be deemed to have knowledge of a
Default or an Event of Default (except the failure of the Owner to pay any
payment of Principal Amount or interest within one (1) Business Day after the
same shall become due, which failure shall constitute knowledge of a Default)
unless notified in writing by the Owner or one or more Certificate Holders.

            SECTION 5.02. Action upon Instructions; Certain Rights and
Limitations.


                                      -29-
<PAGE>

            Subject to the terms of Sections 4.02(a), 4.06, 5.01 and 5.03
hereof, upon the written instructions at any time and from time to time of a
Majority in Interest of Certificate Holders, the Indenture Trustee shall,
subject to the terms of this Section 5.02, take such of the following actions as
may be specified in such instructions: (i) give such notice or direction or
exercise such right, remedy or power hereunder as shall be specified in such
instructions; and (ii) give such notice or direction or exercise such right,
remedy or power hereunder with respect to any part of the Collateral as shall be
specified in such instructions.

            The Indenture Trustee will execute and the Owner will file or cause
to be filed such continuation statements with respect to financing statements
relating to the security interest created hereunder in the Collateral as
specified from time to time in written instructions of a Majority in Interest of
Certificate Holders (which instructions may, by their terms, be operative only
at a future date and which shall be accompanied by the form of such continuation
statement so to be filed). The Indenture Trustee will furnish to each
Certificate Holder promptly upon receipt thereof, duplicates or copies of all
reports, notices, requests, demands, certificates and other instruments
furnished to the Indenture Trustee hereunder.

            SECTION 5.03. Indemnification.

            The Indenture Trustee shall not be under any obligation to take any
action under this Trust Indenture and nothing herein or therein shall require
the Indenture Trustee to expend or risk its own funds or otherwise incur the
risk of any financial liability in the performance of any of its rights or
powers if it shall have reasonable grounds for believing that repayment of such
funds or adequate indemnity against such risk or liability is not reasonably
assured to it (the written indemnity of any Certificate Holder who is a QIB,
signed by an authorized officer thereof, in favor of, delivered to and in form
reasonably satisfactory to Indenture Trustee shall be accepted as reasonable
assurance of adequate indemnity). The Indenture Trustee shall not be required to
take any action under Section 5.01 (other than the first sentence thereof) or
5.02 or Article IV hereof, nor shall any other provision of this Trust Indenture
or any other Operative Document be deemed to impose a duty on the Indenture
Trustee to take any action, if the Indenture Trustee shall have been advised by
counsel that such action is contrary to the terms hereof or is otherwise
contrary to Law.

            SECTION 5.04. No Duties Except as Specified in Trust Indenture or
Instructions.

            The Indenture Trustee shall not have any duty or obligation to use,
operate, store, lease, control, manage, sell, dispose of or otherwise deal with
the Aircraft or any other part of the Collateral, or to otherwise take or
refrain from taking any action under, or in connection with, this Trust
Indenture or any part of the Collateral, except as expressly provided by the
terms of this Trust Indenture or as expressly provided in written instructions
from Certificate Holders as provided in this Trust Indenture; and no implied
duties or obligations shall be read into this Trust Indenture against the
Indenture Trustee. The Indenture Trustee agrees that it will in its individual
capacity and at its own cost and expense (but without any right of indemnity in
respect of any such cost or expense under Section 8.01 hereof), promptly take
such action as may be necessary duly to discharge all liens and encumbrances on
any part of the Collateral which result from


                                      -30-
<PAGE>

claims against it in its individual capacity not related to the ownership of the
Aircraft or the administration of the Collateral or any other transaction
pursuant to this Trust Indenture or any document included in the Collateral.

            SECTION 5.05. No Action Except Under Trust Indenture or
Instructions.

            The Indenture Trustee agrees that it will not use, operate, store,
lease, control, manage, sell, dispose of or otherwise deal with the Aircraft or
any other part of the Collateral except in accordance with the powers granted
to, or the authority conferred upon, the Indenture Trustee pursuant to this
Trust Indenture and in accordance with the express terms hereof.

            SECTION 5.06. Investment of Amounts Held by Indenture Trustee.

            Any amounts held by the Indenture Trustee pursuant to Section 3.02,
or pursuant to any provision of any other Operative Document providing for
amounts to be held by the Indenture Trustee which are not distributed pursuant
to the other provisions of Article III hereof shall be invested by the Indenture
Trustee from time to time in Cash Equivalents as directed by the Owner so long
as the Indenture Trustee may acquire the same using its best efforts. Unless
otherwise expressly provided in this Trust Indenture, any income realized as a
result of any such investment, net of the Indenture Trustee's reasonable fees
and expenses in making such investment, shall be held and applied by the
Indenture Trustee in the same manner as the principal amount of such investment
is to be applied and any losses, net of earnings and such reasonable fees and
expenses, shall be charged against the principal amount invested. The Indenture
Trustee shall not be liable for any loss resulting from any investment required
to be made by it under this Trust Indenture other than by reason of its willful
misconduct or gross negligence, and any such investment may be sold (without
regard to its maturity) by the Indenture Trustee without instructions whenever
such sale is necessary to make a distribution required by this Trust Indenture.

                                   ARTICLE VI

                              THE INDENTURE TRUSTEE

            SECTION 6.01. Acceptance of Trusts and Duties.

            The Indenture Trustee accepts the duties hereby created and
applicable to it and agrees to perform the same but only upon the terms of this
Trust Indenture and agrees to receive and disburse all monies constituting part
of the Collateral in accordance with the terms hereof. The Indenture Trustee, in
its individual capacity, shall not be answerable or accountable under any
circumstances, except (i) for its own willful misconduct or gross negligence
(other than for the handling of funds, for which the standard of accountability
shall be willful misconduct or negligence), and (ii) as provided in the fourth
sentence of Section 2.04(a) hereof and the last sentence of Section 5.04 hereof.

            SECTION 6.02. Absence of Duties.


                                      -31-
<PAGE>

            In the case of the Indenture Trustee, except in accordance with
written instructions furnished pursuant to Section 5.01 or 5.02 hereof, and
except as provided in, and without limiting the generality of, Sections 5.03 and
5.04 hereof, the Indenture Trustee shall have no duty (i) to see to any
registration of the Aircraft or any recording or filing of this Trust Indenture
or any other document, or to see to the maintenance of any such registration,
recording or filing, (ii) to see to any insurance on the Aircraft or to effect
or maintain any such insurance, whether or not the Owner shall be in default
with respect thereto, (iii) to see to the payment or discharge of any lien or
encumbrance of any kind against any part of the Collateral, (iv) to confirm,
verify or inquire into the failure to receive any financial statements from the
Owner, or (v) to inspect the Aircraft at any time or ascertain or inquire as to
the performance or observance of any of the Owner's covenants herein with
respect to the Aircraft.

            SECTION 6.03. No Representations or Warranties as to Aircraft or
Documents.

            THE INDENTURE TRUSTEE IN ITS INDIVIDUAL OR TRUST CAPACITY DOES NOT
MAKE AND SHALL NOT BE DEEMED TO HAVE MADE AND HEREBY EXPRESSLY DISCLAIMS ANY
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AS TO THE TITLE, AIRWORTHINESS,
VALUE, COMPLIANCE WITH SPECIFICATIONS, CONDITION, DESIGN, QUALITY, DURABILITY,
OPERATION, MERCHANTABILITY OR FITNESS FOR USE FOR A PARTICULAR PURPOSE OF THE
AIRCRAFT OR ANY ENGINE, AS TO THE ABSENCE OF LATENT OR OTHER DEFECTS, WHETHER OR
NOT DISCOVERABLE, AS TO THE ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK
OR COPYRIGHT, AS TO THE ABSENCE OF OBLIGATIONS BASED ON STRICT LIABILITY IN TORT
OR ANY OTHER REPRESENTATION OR WARRANTY WHATSOEVER. The Indenture Trustee, in
its individual or trust capacities, does not make, nor shall it be deemed to
have made, any representation or warranty as to the validity, legality or
enforceability of this Trust Indenture, the Participation Agreement, the Secured
Certificates, the Purchase Agreement, the Consent and Agreement or the
Guarantee, or as to the correctness of any statement contained in any thereof,
except for the representations and warranties of the Indenture Trustee, in each
case expressly made in this Trust Indenture or in the Participation Agreement.
The Loan Participants and the Certificate Holders make no representation or
warranty hereunder whatsoever.

            SECTION 6.04. No Segregation of Monies; No Interest.

            Any monies paid to or retained by the Indenture Trustee pursuant to
any provision hereof and not then required to be distributed to the Certificate
Holders, or the Owner as provided in Article III hereof need not be segregated
in any manner except to the extent required by Law or Section 5.06, 7.04(g),
7.06(f) or 7.07(c) hereof, and may be deposited under such general conditions as
may be prescribed by Law, and the Indenture Trustee shall not be liable for any
interest thereon (except that the Indenture Trustee shall invest all monies held
as directed by the Owner so long as no Default or Event of Default has occurred
and is continuing (or in the absence of such direction, by the Majority In
Interest of Certificate Holders) in Cash Equivalents; provided, however, that
any payments received, or applied hereunder, by the Indenture Trustee


                                      -32-
<PAGE>

shall be accounted for by the Indenture Trustee so that any portion thereof paid
or applied pursuant hereto shall be identifiable as to the source thereof.

            SECTION 6.05. Reliance; Agreements; Advice of Counsel.

            The Indenture Trustee shall not incur any liability to anyone in
acting upon any signature, instrument, notice, resolution, request, consent,
order, certificate, report, opinion, bond or other document or paper believed by
it to be genuine and believed by it to be signed by the proper party or parties.
The Indenture Trustee may accept a copy of a resolution of the Board of
Directors (or Executive Committee thereof) of any party to the Participation
Agreement, certified by the Secretary or an Assistant Secretary thereof as duly
adopted and in full force and effect, as conclusive evidence that such
resolution has been duly adopted and that the same is in full force and effect.
As to the aggregate unpaid Principal Amount of Secured Certificates outstanding
as of any date, the Owner may for all purposes hereof rely on a certificate
signed by any Vice President or other authorized corporate trust officer of the
Indenture Trustee. As to any fact or matter relating to the Owner the manner of
ascertainment of which is not specifically described herein, the Indenture
Trustee may for all purposes hereof rely on a certificate, signed by a duly
authorized officer of the Owner, as to such fact or matter, and such certificate
shall constitute full protection to the Indenture Trustee for any action taken
or omitted to be taken by it in good faith in reliance thereon. In the
administration of the trusts hereunder, the Indenture Trustee may execute any of
the trusts or powers hereof and perform its powers and duties hereunder directly
or through agents or attorneys and may at the expense of the Collateral, consult
with counsel, accountants and other skilled persons to be selected and retained
by it, and the Indenture Trustee shall not be liable for anything done, suffered
or omitted in good faith by them in accordance with the written advice or
written opinion of any such counsel, accountants or other skilled persons.

            SECTION 6.06. Compensation.

            The Indenture Trustee shall be entitled to reasonable compensation,
including expenses and disbursements (including the reasonable fees and expenses
of counsel), for all services rendered hereunder and shall, on and subsequent to
an Event of Default hereunder, have a priority claim on the Collateral for the
payment of such compensation, to the extent that such compensation shall not be
paid by the Owner, and shall have the right, on and subsequent to an Event of
Default hereunder, to use or apply any monies held by it hereunder in the
Collateral toward such payments. The Indenture Trustee agrees that it shall have
no right against the Loan Participants or the Certificate Holders for any fee as
compensation for its services as trustee under this Trust Indenture.

            SECTION 6.07. Instructions from Certificate Holders.

            In the administration of the trusts created hereunder, the Indenture
Trustee shall have the right to seek instructions from a Majority in Interest of
Certificate Holders should any provision of this Trust Indenture appear to
conflict with any other provision herein or should the Indenture Trustee's
duties or obligations hereunder be unclear, and the Indenture Trustee shall
incur no liability in refraining from acting until it receives such
instructions. The Indenture


                                      -33-
<PAGE>

Trustee shall be fully protected for acting in accordance with any instructions
received under this Section 6.07.

                                   ARTICLE VII

                             COVENANTS OF THE OWNER

            SECTION 7.01. Liens.

            The Owner will not directly or indirectly create, incur, assume or
suffer to exist any Lien on or with respect to the Aircraft, title thereto or
any interest therein, except (i) the Lien of this Trust Indenture, and any other
rights existing pursuant to the Operative Documents, (ii) the rights of others
under agreements or arrangements to the extent permitted by the terms of
Sections 7.02(b) and 7.03(b) hereof, (iii) Loan Participant Liens and Indenture
Trustee's Liens, (iv) Liens for taxes of the Owner (or any Lessee) either not
yet due or being contested in good faith by appropriate proceedings so long as
such proceedings do not involve any material risk of the sale, forfeiture or
loss of the Airframe or any Engine or any interest therein, or, so long as any
Secured Certificates shall be outstanding, adversely affect the Lien of this
Trust Indenture, (v) materialmen's, mechanics', workmen's, repairmen's,
employees' or other like Liens arising in the ordinary course of the Owner's
(or, if a Lease is then in effect, Lessee's business (including those arising
under maintenance agreements entered into in the ordinary course of business)
securing obligations that are not overdue for a period of more than sixty (60)
days or are being contested in good faith by appropriate proceedings so long as
such proceedings do not involve any material danger of the sale, forfeiture or
loss of the Airframe or any Engine or any interest therein or, so long as any
Secured Certificates shall be outstanding, adversely affect the Lien of this
Trust Indenture, (vi) Liens arising out of any judgment or award against the
Owner (or any Lessee), unless the judgment secured shall not, within sixty (60)
days after the entry thereof, have been discharged, vacated, reversed or
execution thereof stayed pending appeal or shall not have been discharged,
vacated or reversed within sixty (60) days after the expiration of such stay,
(vii) any other Lien with respect to which the Owner (or any Lessee) shall have
provided a bond, cash collateral or other security adequate in the reasonable
opinion of the Indenture Trustee, and (viii) Liens approved in writing by the
Indenture Trustee. The Owner will promptly, at its own expense, take (or cause
to be taken) such actions as may be necessary duly to discharge any such Lien
not excepted above if the same shall arise at any time.

            SECTION 7.02. Registration, Maintenance and Operation; Possession
and Leases; Insignia.

            (a) (I) Registration and Maintenance. The Owner, at its own cost and
expense, shall (or shall cause any Lessee to): (i) cause the Aircraft to be duly
registered in its name, and, subject to the second paragraph of this Section
7.02(a) and Section 8(f) of the Participation Agreement, to remain duly
registered in the name of the Owner under the Federal Aviation Act, provided
that the Owner shall not register the Aircraft or permit the Aircraft to be
registered under any laws other than the Federal Aviation Act at any time except
as provided in Section 8(f) of the Participation Agreement and shall cause this
Trust Indenture to be duly recorded and maintained of record as a first mortgage
on the Aircraft; (ii) maintain, service, repair and overhaul (or cause


                                      -34-
<PAGE>

to be maintained, serviced, repaired and overhauled) the Aircraft so as to keep
the Aircraft in as good an operating condition as when initially subjected to
the Lien hereof, ordinary wear and tear excepted, and as may be necessary to
enable the applicable airworthiness certification for the Aircraft to be
maintained in good standing at all times (other than during temporary periods of
storage in accordance with applicable regulations or during maintenance or
modification permitted hereunder) under the Federal Aviation Act, except when
all Airbus Model [A320-200] [A319-100] aircraft powered by engines of the same
type as those with which the Airframe shall be equipped at the time of such
grounding and registered in the United States have been grounded by the FAA
(although such certification need actually be maintained only during such
periods as the Aircraft is registered in the United States), or the applicable
laws of any other jurisdiction in which the Aircraft may then be registered from
time to time in accordance with Section 8(f) of the Participation Agreement, and
utilizing, except during any period that a Lease is in effect, the same manner
and standard of maintenance, service, repair or overhaul used by the Owner with
respect to similar aircraft operated by the Owner in similar circumstances and
utilizing, during any period that a Lease is in effect, the same manner and
standard of maintenance, service, repair or overhaul used by the Lessee with
respect to similar aircraft operated by the Lessee in similar circumstances;
provided, however, that in all circumstances the Aircraft shall be maintained by
the Owner (or any Lessee) in accordance with maintenance standards required by,
or substantially equivalent to those required by, the FAA or the central civil
aviation authority of Canada, France, Germany, Japan, the Netherlands or the
United Kingdom; and (iii) maintain or cause to be maintained all records, logs
and other materials required to be maintained in respect of the Aircraft by the
FAA or the applicable regulatory agency or body of any other jurisdiction in
which the Aircraft may then be registered. (II) Operation. The Owner will not
maintain, use, service, repair, overhaul or operate the Aircraft (or permit any
Lessee to maintain, use, service, repair, overhaul or operate the Aircraft) in
violation of any law or any rule, regulation, order or certificate of any
government or governmental authority (domestic or foreign) having jurisdiction,
or in violation of any airworthiness certificate, license or registration
relating to the Aircraft issued by any such authority, except to the extent the
Owner (or, if a Lease is then in effect, any Lessee) is contesting in good faith
the validity or application of any such law, rule, regulation or order in any
reasonable manner which does not materially adversely affect the first priority
Lien of this Trust Indenture and does not involve any material risk of sale,
forfeiture or loss of the Aircraft. The Owner will not operate the Aircraft, or
permit any Lessee to operate the Aircraft, in any area excluded from coverage by
any insurance required by the terms of Section 7.04; provided, however, that the
failure of the Owner to comply with the provisions of this sentence shall not
give rise to an Event of Default hereunder where such failure is attributable to
causes beyond the reasonable control of the Owner (or any Lessee) or to
extraordinary circumstances involving an isolated occurrence or series of
incidents not in the ordinary course of the regular operations of the Owner (or
any Lessee) and in each such case the Owner (or such Lessee, as the case may be)
is taking all reasonable steps to remedy such failure as soon as is reasonably
practicable.

            The Indenture Trustee, upon compliance with all of the terms of
Section 8(f) of the Participation Agreement, shall, at the request and sole
expense of the Owner, cooperate with the Owner to take all actions required to
change the registration of the Aircraft to another country.


                                      -35-
<PAGE>

            (b) Possession and Leases. The Owner will not, without the prior
written consent of the Indenture Trustee, lease or otherwise in any manner
deliver, transfer or relinquish possession of the Airframe or any Engine or
install or permit any Engine to be installed on any airframe other than the
Airframe or enter into any Wet Lease; provided that, so long as no Default of
the type referred to in Section 4.01(a) or 4.01(e) or Event of Default shall
have occurred and be continuing at the time of such lease, delivery, transfer or
relinquishment of possession or installation or such Wet Lease, and so long as
the action to be taken shall not deprive the Indenture Trustee of the perfected
first priority Lien of this Trust Indenture on the Airframe or (subject to the
further proviso (B) to clause (i) of this Section 7.02(b)) any Engine, and so
long as the Owner (or any Lessee) shall comply with the provisions of Sections
7.02(a) and 7.04 hereof, the Owner (or, except with respect to clause (x) below,
any Lessee) may, without the prior written consent of the Indenture Trustee:

                  (i) subject the Airframe and the Engines or engines then
            installed thereon to normal interchange agreements or any Engine to
            normal pooling or similar arrangements, in each case customary in
            the airline industry and entered into by the Owner (or, if a Lease
            is then in effect, by Lessee) in the ordinary course of its
            business; provided that (A) no such agreement or arrangement
            contemplates or requires the transfer of title to the Airframe, (B)
            if the Owner's title to any Engine shall be divested under any such
            agreement or arrangement, such divestiture shall be deemed to be an
            Event of Loss with respect to such Engine and the Owner shall (or
            shall cause Lessee to) comply with Section 7.06(b) hereof in respect
            thereof, and (C) any interchange agreement to which the Airframe may
            be subject shall be with a U.S. Air Carrier or a Foreign Air
            Carrier;

                  (ii) deliver possession of the Airframe or any Engine to the
            manufacturer thereof (or for delivery thereto) or to any
            organization (or for delivery thereto) for testing, service, repair,
            maintenance or overhaul work on the Airframe or Engine or any part
            of any thereof or for alterations or modifications in or additions
            to such Airframe or Engine to the extent required or permitted by
            the terms of Section 7.03(c) hereof;

                  (iii) install an Engine on an airframe which is owned by the
            Owner (or any Lessee) free and clear of all Liens, except: (A)
            Permitted Liens and those which apply only to the engines (other
            than Engines), appliances, parts, instruments, appurtenances,
            accessories, furnishings and other equipment (other than Parts)
            installed on such airframe (but not to the airframe as an entirety),
            (B) the rights of third parties under interchange agreements which
            would be permitted under clause (i) above, provided that the Owner's
            title to such Engine and the first priority Lien of this Trust
            Indenture shall not be divested or impaired as a result thereof and
            (C) mortgage liens or other security interests, provided that (as
            regards this clause (C)) such mortgage liens or other security
            interests effectively provide that such Engine shall not become
            subject to the lien of such mortgage or security interest,
            notwithstanding the installation thereof on such airframe;


                                      -36-
<PAGE>

                  (iv) install an Engine on an airframe leased to the Owner (or
            any Lessee) or purchased by the Owner (or any Lessee) subject to a
            conditional sale or other security agreement, provided that (x) such
            airframe is free and clear of all Liens, except: (A) the rights of
            the parties to the lease or conditional sale or other security
            agreement covering such airframe, or their assignees, and (B) Liens
            of the type permitted by subparagraph (iii) of this paragraph (b)
            and (y) such lease, conditional sale or other security agreement
            effectively provides that such Engine shall not become subject to
            the lien of such lease, conditional sale or other security
            agreement, notwithstanding the installation thereof on such
            airframe;

                  (v) install an Engine on an airframe owned by the Owner (or
            any Lessee), leased to the Owner (or any Lessee) or purchased by the
            Owner (or any Lessee) subject to a conditional sale or other
            security agreement under circumstances where neither subparagraph
            (iii) nor subparagraph (iv) of this paragraph (b) is applicable,
            provided that such installation shall be deemed an Event of Loss
            with respect to such Engine and the Owner shall (or shall cause any
            Lessee to) comply with Section 7.06(b) hereof in respect thereof,
            the Indenture Trustee not intending hereby to waive any right or
            interest it may have to or in such Engine under applicable law until
            compliance by the Owner with such Section 7.06(b);

                  (vi) to the extent permitted by Section 7.03(b) hereof,
            subject any appliances, Parts or other equipment owned by the Owner
            and removed from the Airframe or any Engine to any pooling
            arrangement referred to in Section 7.03(b) hereof;

                  (vii) subject (or permit any Lessee to subject) the Airframe
            or any Engine to the Civil Reserve Air Fleet Program and transfer
            (or permit any Lessee to transfer) possession of the Airframe or any
            Engine to the United States of America or any instrumentality or
            agency thereof pursuant to the Civil Reserve Air Fleet Program, so
            long as the Owner (or any Lessee) shall (A) promptly notify the
            Indenture Trustee upon subjecting the Airframe or any Engine to the
            Civil Reserve Air Fleet Program in any contract year and provide the
            Indenture Trustee with the name and address of the Contracting
            Office Representative for the Air Mobility Command of the United
            States Air Force to whom notice must be given pursuant to Section
            4.02 hereof, and (B) promptly notify the Indenture Trustee upon
            transferring possession of the Airframe or any Engine to the United
            States of America or any agency or instrumentality thereof pursuant
            to such program;

                  (viii) enter into a Wet Lease for the Airframe and Engines or
            engines then installed thereon with any third party provided that if
            the Owner (or any Lessee) shall enter into any Wet Lease for a
            period of more than one year (including renewal options) the Owner
            shall provide the Indenture Trustee written notice of such Wet Lease
            (such notice to be given prior to entering into such Wet


                                      -37-
<PAGE>

            Lease, if practicable, but in any event promptly after entering into
            such Wet Lease);

                  (ix) transfer possession of the Airframe or any Engine to the
            United States of America or any instrumentality or agency thereof
            pursuant to a contract, a copy of which shall be provided to the
            Indenture Trustee; or

                  (x) the Owner may, at any time, enter into any lease with (1)
            a U.S. Air Carrier, (2) any Person approved in writing by the
            Indenture Trustee, which approval shall not be unreasonably withheld
            or (3) any Permitted Lessee if (A) in any such case, the Lessee
            under such lease is not subject to a proceeding or final order under
            applicable bankruptcy, insolvency or reorganization laws on the date
            such lease is entered into, (B) in the event that the Lessee under
            such lease is a foreign air carrier (other than a foreign air
            carrier principally based in Taiwan), the United States maintains
            diplomatic relations with the country in which such proposed Lessee
            is principally based at the time such lease is entered into (or, in
            the case of a lease to a proposed Lessee principally based in
            Taiwan, maintains diplomatic relations at least as good as those in
            effect on the Closing Date) and (C) in the event that the Lessee
            under such lease is a foreign air carrier, the Indenture Trustee
            shall have received an opinion of counsel to the Owner to the effect
            that (I) the terms of the proposed lease will be legal, valid,
            binding and (subject to customary exceptions in foreign opinions
            generally) enforceable against the proposed Lessee in the country in
            which the proposed Lessee is principally based, (II) there exist no
            possessory rights in favor of the Lessee under such lease under the
            laws of such Lessee's country of domicile that would, upon
            bankruptcy or insolvency of or other default by the Owner and
            assuming at such time such Lessee is not insolvent or bankrupt,
            prevent the return or repossession of the Aircraft in accordance
            with the terms of this Trust Indenture, (III) the laws of such
            Lessee's country of domicile require fair compensation by the
            government of such jurisdiction payable in currency freely
            convertible into Dollars for the loss of use of the Aircraft in the
            event of the requisition by such government of such use, and (IV)
            the laws of such Lessee's country of domicile would give recognition
            to the Owner's title to the Aircraft, to the registry of the
            Aircraft in the name of the Owner (or the proposed Lessee, as
            "lessee", as appropriate) and to the Lien of this Trust Indenture.

            The rights of any Lessee or other transferee who receives possession
by reason of a transfer permitted by this paragraph (b) (other than the transfer
of an Engine which is deemed an Event of Loss) shall be effectively subject and
subordinate to, and any Lease permitted by this paragraph (b) shall be expressly
subject and subordinate to, all the terms of this Trust Indenture and to the
Lien of this Trust Indenture, including, without limitation, the covenants
contained in Section 7.02(a) hereof and the Indenture Trustee's rights to
foreclosure and repossession pursuant to Section 4.02 hereof and to avoid such
Lease upon such repossession, and the Owner shall remain primarily liable
hereunder for the performance of all of the terms of this Trust Indenture to the
same extent as if such Lease or transfer had not occurred, and, except as


                                      -38-
<PAGE>

otherwise provided herein, the terms of any such Lease shall not permit any
Lessee to take any action not permitted to be taken by the Owner in this Trust
Indenture with respect to the Aircraft. No pooling agreement, lease or other
relinquishment of possession of the Airframe or any Engine or Wet Lease shall in
any way discharge or diminish any of the Owner's obligations to the Indenture
Trustee hereunder or constitute a waiver of the Indenture Trustee's rights or
remedies hereunder. Any lease permitted under this Section 7.02(b) shall
expressly prohibit any further sublease by the Lessee. The Indenture Trustee
agrees, for the benefit of the Owner (and any Lessee) and for the benefit of any
mortgagee or other holder of a security interest in any engine (other than an
Engine) owned by the Owner (or any Lessee), any lessor of any engine (other than
an Engine) leased to the Owner (or any Lessee) and any conditional vendor of any
engine (other than an Engine) purchased by the Owner (or any Lessee) subject to
a conditional sale agreement or any other security agreement, that no interest
shall be created hereunder in any engine so owned, leased or purchased and that
neither the Indenture Trustee nor its successors or assigns will acquire or
claim, as against the Owner (or any Lessee) or any such mortgagee, lessor or
conditional vendor or other holder of a security interest or any successor or
assignee of any thereof, any right, title or interest in such engine as the
result of such engine being installed on the Airframe; provided, however, that
such agreement of the Indenture Trustee shall not be for the benefit of any
lessor or secured party of any airframe (other than the Airframe) leased to the
Owner (or any Lessee) or purchased by the Owner (or any Lessee) subject to a
conditional sale or other security agreement or for the benefit of any mortgagee
of or any other holder of a security interest in an airframe owned by the Owner
(or any Lessee), unless such lessor, conditional vendor, other secured party or
mortgagee has expressly agreed (which agreement may be contained in such lease,
conditional sale or other security agreement or mortgage) that neither it nor
its successors or assigns will acquire, as against the Indenture Trustee, any
right, title or interest in an Engine as a result of such Engine being installed
on such airframe. The Owner shall provide to the Indenture Trustee (i) written
notice of any Lease hereunder (such notice to be given not later than five days
prior to entering into such Lease, if practicable, but in any event promptly
after entering into any such Lease) and (ii) a copy of each Lease which has a
term of more than three months.

            (c) Insignia. On or prior to the Closing Date, or as soon as
practicable thereafter, the Owner agrees to affix and maintain (or cause to be
affixed and maintained), at its expense, in the cockpit of the Airframe adjacent
to the airworthiness certificate therein and on each Engine, a nameplate bearing
the inscription:

                                  Mortgaged To

                      State Street Bank and Trust Company,
                              as Indenture Trustee

(such nameplate to be replaced, if necessary, with a nameplate reflecting the
name of any successor Indenture Trustee as permitted herein). Except as above
provided, the Owner will not allow the name of any Person (other than the Owner)
to be placed on the Airframe or on any Engine as a designation that might be
interpreted as a claim of the ownership; provided that nothing herein contained
shall prohibit the Owner (or any Lessee) from placing its customary


                                      -39-
<PAGE>

colors and insignia on the Airframe or any Engine.

            SECTION 7.03. Replacement and Pooling of Parts; Alterations,
Modifications and Additions.

            (a) Replacement of Parts. The Owner, at its own cost and expense,
will so long as the Airframe or an Engine is subject to the Lien of this Trust
Indenture promptly replace or cause to be replaced all Parts which may from time
to time be incorporated or installed in or attached to the Airframe or any
Engine and which may from time to time become worn out, lost, stolen, destroyed,
seized, confiscated, damaged beyond repair or permanently rendered unfit for use
for any reason whatsoever, except as otherwise provided in paragraph (c) of this
Section 7.03 or if the Airframe or an Engine to which a Part relates has
suffered an Event of Loss. In addition, the Owner (or any Lessee) may, at its
own cost and expense, remove in the ordinary course of maintenance, service,
repair, overhaul or testing, any Parts, whether or not worn out, lost, stolen,
destroyed, seized, confiscated, damaged beyond repair or permanently rendered
unfit for use, provided that the Owner (or any Lessee), except as otherwise
provided in paragraph (c) of this Section 7.03, will, at its own cost and
expense, replace such Parts as promptly as practicable. All replacement Parts
shall be free and clear of all Liens (except for Permitted Liens and pooling
arrangements to the extent permitted by paragraph (b) of this Section 7.03 and
except in the case of replacement property temporarily installed on an emergency
basis) and shall be in as good operating condition as, and shall have a value
and utility at least equal to, the Parts replaced assuming such replaced Parts
were in the condition and repair required to be maintained by the terms hereof.
Except as otherwise provided in paragraph (c) of this Section 7.03, all Parts at
any time removed from the Airframe or any Engine shall remain subject to the
Lien of this Trust Indenture, no matter where located, until such time as such
Parts shall be replaced by Parts which have been incorporated or installed in or
attached to the Airframe or such Engine and which meet the requirements for
replacement Parts specified above. Immediately upon any replacement part
becoming incorporated or installed in or attached to the Airframe or any Engine
as above provided, without further act (subject only to Permitted Liens and any
pooling arrangement to the extent permitted by paragraph (b) of this Section
7.03 and except in the case of replacement property temporarily installed on an
emergency basis), (i) title to such replacement Part shall be owned by the
Owner, (ii) such replacement Part shall become subject to the Lien of this Trust
Indenture and be deemed part of the Airframe or such Engine for all purposes
hereof to the same extent as the Parts originally incorporated or installed in
or attached to the Airframe or such Engine, and (iii) the replaced Part shall
thereupon be free and clear of all rights of the Indenture Trustee, and shall no
longer be subject to the Lien of this Trust Indenture or be deemed a Part
hereunder.

            (b) Pooling of Parts. Any Part removed from the Airframe or any
Engine as provided in paragraph (a) of this Section 7.03 may be subjected by the
Owner (or any Lessee) to a normal pooling arrangement customary in the airline
industry of which the Owner (or, if a Lease is then in effect, any Lessee) is a
party entered into in the ordinary course of the Owner's (or any Lessee's)
business; provided that the Part replacing such removed Part shall be
incorporated or installed in or attached to such Airframe or Engine in
accordance


                                      -40-
<PAGE>

with such paragraph (a) as promptly as practicable after the removal of such
removed Part. In addition, any replacement Part when incorporated or installed
in or attached to the Airframe or any Engine in accordance with such paragraph
(a) may be owned by any third party subject to such a normal pooling
arrangement, provided that the Owner (or any Lessee), at its expense, as
promptly thereafter as practicable, either (i) causes such replacement Part to
become subject to the Lien of this Trust Indenture free and clear of all Liens
except Permitted Liens (other than pooling arrangements), at which time such
temporary replacement Part shall become a Part or (ii) replaces such replacement
Part by incorporating or installing in or attaching to the Airframe or Engine a
further replacement Part which is subject to the Lien of this Trust Indenture,
free and clear of all Liens except Permitted Liens (other than pooling
arrangements).

            (c) Alterations, Modifications and Additions. The Owner, at its own
expense, will make (or cause to be made) such alterations and modifications in
and additions to the Airframe and Engines as may be required from time to time
to meet the applicable standards of the FAA or any other governmental authority
having jurisdiction; provided, however, that the Owner (or, if a Lease is then
in effect, any Lessee) may, in good faith, contest the validity or application
of any such law, rule, regulation or order in any reasonable manner which does
not adversely affect the Indenture Trustee. In addition, the Owner (or any
Lessee), at its own expense, may from time to time add further parts or
accessories and make such alterations and modifications in and additions to the
Airframe or any Engine as the Owner (or any Lessee) may deem desirable in the
proper conduct of its business, including, without limitation, removal of Parts
which the Owner (or any Lessee) has determined in its reasonable judgment to be
obsolete or no longer suitable or appropriate for use on the Airframe or such
Engine (such parts, "Obsolete Parts"); provided that no such alteration,
modification or addition shall materially diminish the value, utility or
remaining useful life of the Airframe or such Engine below the value, utility or
remaining useful life thereof immediately prior to such alteration, modification
or addition, assuming the Airframe or such Engine was then in the condition
required to be maintained by the terms of this Trust Indenture, except that the
value (but not the utility or remaining useful life) of the Airframe or any
Engine may be reduced by the value of Obsolete Parts which shall have been
removed so long as the aggregate value of all Obsolete Parts which shall have
been removed and not replaced shall not exceed $400,000. All Parts incorporated
or installed in or attached or added to the Airframe or an Engine as the result
of such alteration, modification or addition (the "Additional Parts") shall,
without further act, become subject to the Lien of this Trust Indenture.
Notwithstanding the foregoing sentence, the Owner (or any Lessee) may remove or
suffer to be removed any Additional Part, provided that such Additional Part (i)
is in addition to, and not in replacement of or substitution for, any Part
originally incorporated or installed in or attached to the Airframe or any
Engine on the Closing Date or any Part in replacement of, or substitution for,
any such Part, (ii) is not required to be incorporated or installed in or
attached or added to the Airframe or any Engine pursuant to the terms of Section
7.02 hereof or the first sentence of this paragraph (c) and (iii) can be removed
from the Airframe or such Engine without diminishing or impairing the value,
utility or remaining useful life which the Airframe or such Engine would have
had at the time of removal had such alteration, modification or addition not
occurred, assuming that such Airframe or Engine was in the condition and repair
required to be maintained by the terms hereof. Upon the removal by the Owner (or
any Lessee) of any Part as provided above, such Part shall, without further act,
be free and clear of all rights of the Indenture Trustee, such Part shall not be
subject to the Lien of this Trust Indenture and such Part shall no longer be
deemed part of the Airframe or Engine from which it was removed.


                                      -41-
<PAGE>

            SECTION 7.04. Insurance.

            (a) Public Liability and Property Damage Insurance. (I) Except as
provided in clause (II) of this Section 7.04(a), the Owner will carry or cause
to be carried at its or any Lessee's expense (i) aircraft public liability
(including, without limitation, passenger legal liability) (and including
aircraft war risk and hijacking insurance, if and to the extent the same is
maintained by the Owner (or, if a Lease is then in effect, if and to the extent
maintained by Lessee) with respect to other aircraft owned or leased, and
operated by the Owner (or such Lessee) on the same routes) insurance and
property damage insurance (exclusive of manufacturer's product liability
insurance) with respect to the Aircraft, in an amount not less than the greater
of (x) the amount of public liability and property damage insurance from time to
time applicable to aircraft owned or operated by the Owner (or, if a Lease is
then in effect, by Lessee) of the same type as the Aircraft and (y)
$[250,000,000 for A319's and $300,000,000 for A320's] per occurrence and (ii)
cargo liability insurance, in the case of both clause (i) and clause (ii), (A)
of the type and covering the same risks as from time to time applicable to
aircraft operated by the Owner (or, if a Lease is then in effect, by Lessee) of
the same type as the Aircraft and (B) which is maintained in effect with
insurers of recognized responsibility. Any policies of insurance carried in
accordance with this paragraph (a) and any policies taken out in substitution or
replacement for any of such policies (A) shall be amended to name the Indenture
Trustee (but without imposing on such party liability to pay the premiums for
such insurance) (and, if any Lease shall be in effect, the Owner in its capacity
as lessor under the Lease) as an additional insured as its interest may appear,
(B) shall provide that in respect of the interest of the Indenture Trustee (and,
if any Lease shall be in effect, the Owner in its capacity as lessor under the
Lease) in such policies the insurance shall not be invalidated by any action or
inaction of the Owner (or, if any Lease is then in effect, any Lessee) or any
other Person and shall insure the Indenture Trustee (and, if any Lease shall be
in effect, the Owner in its capacity as lessor under the Lease) regardless of
any breach or violation of any warranty, declaration or condition contained in
such policies by the Owner (or, if any Lease is then in effect, any Lessee), (C)
may provide for self-insurance to the extent permitted by Section 7.04(d) and
(D) shall provide that if the insurers cancel such insurance for any reason
whatever or if any material change is made in such insurance which adversely
affects the interest of the Indenture Trustee (or, if any Lease shall be in
effect, the Owner in its capacity as lessor under the Lease), or such insurance
shall lapse for non-payment of premium, such cancellation, lapse or change shall
not be effective as to the Indenture Trustee (or, if any Lease shall be in
effect, the Owner in its capacity as lessor under the Lease) for thirty (30)
days (seven (7) days in the case of war risk and allied perils coverage) after
issuance to the Indenture Trustee (or, if any Lease shall be in effect, the
Owner in its capacity as lessor under the Lease) of written notice by such
insurers of such cancellation, lapse or change; provided, however, that if any
notice period specified above is not reasonably obtainable, such policies shall
provide for as long a period of prior notice as shall then be reasonably
obtainable. Each liability policy (1) shall be primary without right of
contribution from any other insurance which is carried by the Indenture Trustee
(or, if any Lease shall be in effect, the Owner in its capacity as lessor under
the Lease), (2) shall expressly provide that all of the provisions thereof,
except the limits of liability, shall operate in the same manner as if there
were a separate policy covering each insured, and (3) shall waive any right of
the insurers to any set-off or counterclaim


                                      -42-
<PAGE>

or any other deduction, whether by attachment or otherwise, in respect of any
liability of the Indenture Trustee (or, if any Lease shall be in effect, the
Owner in its capacity as lessor under the Lease) to the extent of any moneys due
to the Indenture Trustee (or, if any Lease shall be in effect, the Owner in its
capacity as lessor under the Lease).

            (II) During any period that the Aircraft is on the ground and not in
operation, the Owner may carry or cause to be carried, in lieu of the insurance
required by clause (I) above, insurance otherwise conforming with the provisions
of said clause (I) except that (A) the amounts of coverage shall not be required
to exceed the amounts of public liability and property damage insurance from
time to time applicable to aircraft owned or operated by the Owner (or, if a
Lease is then in effect, by Lessee) of the same type as the Aircraft which are
on the ground and not in operation; and (B) the scope of the risks covered and
the type of insurance shall be the same as from time to time shall be applicable
to aircraft owned or operated by the Owner (or, if a Lease is then in effect, by
Lessee) of the same type which are on the ground and not in operation.

            (b) Insurance Against Loss or Damage to the Aircraft. (I) Except as
provided in clause (II) of this Section 7.04(b), the Owner shall maintain or
cause to be maintained in effect, at its or any Lessee's expense, with insurers
of recognized responsibility, all-risk ground and flight aircraft hull insurance
covering the Aircraft and all-risk ground and flight coverage of Engines and
Parts while temporarily removed from the Aircraft and not replaced by similar
components (including, without limitation, war risk and governmental
confiscation and expropriation (other than by the government of registry of the
Aircraft) and hijacking insurance, if and to the extent the same is maintained
by the Owner (or, if a Lease is then in effect, by Lessee) with respect to other
aircraft owned or operated by the Owner (or such Lessee) on the same routes,
except that the Owner (or such Lessee) shall maintain war risk and governmental
confiscation and expropriation (other than by the government of registry of the
Aircraft) and hijacking insurance if the Aircraft is operated on routes where
the custom is for major international air carriers flying comparable routes to
carry such insurance) which is of the type as from time to time applicable to
aircraft owned or operated by the Owner (or, if a Lease is then in effect, by
Lessee) of the same type as the Aircraft; provided that such insurance shall at
all times while the Aircraft is subject to this Trust Indenture be for an amount
(subject to self-insurance to the extent permitted by Section 7.04(d)) not less
than the 100% of the then aggregate unpaid Principal Amount of the Secured
Certificates (the "Loan Loss Value"). Any policies carried in accordance with
this paragraph (b) covering the Aircraft and any policies taken out in
substitution or replacement for any such policies (i) shall name the Indenture
Trustee (and, if any Lease shall be in effect, the Owner in its capacity as
lessor under the Lease) as an additional insured, as its interest may appear
(but without imposing on such party liability to pay premiums with respect to
such insurance), (ii) may provide for self-insurance to the extent permitted in
Section 7.04(d), (iii) shall provide that (A) in the event of a loss involving
proceeds in excess of $5,000,000 (or, if the Aircraft is then under a Lease, in
excess of $3,000,000), the proceeds in respect of such loss up to an amount
equal to the aggregate unpaid Principal Amount of the Secured Certificates plus
all accrued and unpaid interest thereon (the "Balance Due") shall be payable to
the Indenture Trustee (except in the case of a loss with respect to an Engine
installed on an airframe other than the Airframe, in which case the Owner (or
any Lessee) shall arrange for any payment of insurance proceeds in respect of
such loss to be held for the account of the


                                      -43-
<PAGE>

Indenture Trustee whether such payment is made to the Owner (or any Lessee) or
any third party), it being understood and agreed that in the case of any payment
to the Indenture Trustee otherwise than in respect of an Event of Loss, the
Indenture Trustee shall, upon receipt of evidence satisfactory to it that the
damage giving rise to such payment shall have been repaired or that such payment
shall then be required to pay for repairs then being made, pay the amount of
such payment to the Owner or its order, and (B) the entire amount of any loss
involving proceeds of $5,000,000 (or, if the Aircraft is then under a Lease, of
$3,000,000) or less or the amount of any proceeds of any loss in excess of the
Balance Due shall be paid to the Owner or its order unless an Event of Default
shall have occurred and be continuing and the insurers have been notified
thereof by the Indenture Trustee, (iv) shall provide that if the insurers cancel
such insurance for any reason whatever, or such insurance lapses for non-payment
of premium or if any material change is made in the insurance which adversely
affects the interest of the Indenture Trustee, such cancellation, lapse or
change shall not be effective as to the Indenture Trustee (or, if any Lease
shall be in effect, the Owner in its capacity as lessor under the Lease) for
thirty (30) days (seven (7) days in the case of hull war risk and allied perils
coverage) after issuance to the Indenture Trustee (or, if any Lease shall be in
effect, the Owner in its capacity as lessor under the Lease), respectively, of
written notice by such insurers of such cancellation, lapse or change, provided,
however, that if any notice period specified above is not reasonably obtainable,
such policies shall provide for as long a period of prior notice as shall then
be reasonably obtainable, (v) shall provide that in respect of the interest of
the Indenture Trustee (and, if any Lease shall be in effect, the Owner in its
capacity as lessor under the Lease) in such policies the insurance shall not be
invalidated by any action or inaction of the Owner (or, if a Lease is then in
effect, any Lessee) or any other Person and shall insure the Indenture Trustee
(and, if any Lease shall be in effect, the Owner in its capacity as lessor under
the Lease) regardless of any breach or violation of any warranty, declaration or
condition contained in such policies by the Owner (or, if a Lease is then in
effect, any Lessee), (vi) shall be primary without any right of contribution
from any other insurance which is carried by the Indenture Trustee (or, if any
Lease shall be in effect, the Owner in its capacity as lessor under the Lease),
(vii) shall waive any right of subrogation of the insurers against the Indenture
Trustee (and, if any Lease shall be in effect, the Owner in its capacity as
lessor under the Lease), and (viii) shall waive any right of the insurers to
set-off or counterclaim or any other deduction, whether by attachment or
otherwise, in respect of any liability of the Indenture Trustee or the Owner (or
any Lessee) to the extent of any moneys due to the Indenture Trustee. In the
case of a loss with respect to an engine (other than an Engine) installed on the
Airframe, the Indenture Trustee shall hold any payment to it of any insurance
proceeds in respect of such loss for the account of any third party that is
entitled to receive such proceeds.

            As between the Indenture Trustee and the Owner, it is agreed that
all insurance payments received as the result of the occurrence of an Event of
Loss will be applied as follows:

                  (x) if such payments are received as a result of an Event of
            Loss with respect to the Airframe (or the Airframe and the Engines
            installed thereon) that has been or is being replaced by the Owner
            as contemplated by Section 7.06(a) hereof, such payments shall be
            paid over to, or retained by, the Indenture Trustee as security and
            upon completion of such replacement shall be paid over to the


                                      -44-
<PAGE>

            Owner;

                  (y) if such payments are received with respect to the Airframe
            (or the Airframe and the Engines installed thereon) that has not
            been or is not being replaced by the Owner as contemplated by
            Section 7.06(a) hereof, so much of such payments remaining, after
            reimbursement of the Indenture Trustee for reasonable costs and
            expenses, as shall not exceed the Balance Due shall be applied in
            reduction of the Owner's obligation to pay such Balance Due, if not
            already paid by the Owner, or, if already paid by the Owner, shall
            be applied to reimburse the Owner for its payment of such Balance
            Due, and the balance, if any, of such payments remaining thereafter
            will be paid over to, or retained by, the Owner (or if directed by
            the Owner, any Lessee); and

                  (z) if such payments are received with respect to an Engine or
            Part under the circumstances contemplated by Section 7.06(b) hereof,
            so much of such payments remaining, after reimbursement of the
            Indenture Trustee for reasonable costs and expenses, shall be paid
            over to, or retained by, the Owner (or if directed by the Owner, any
            Lessee), provided that the Owner shall have fully performed, or
            concurrently therewith will fully perform, the terms of Section
            7.06(b) hereof with respect to the Event of Loss for which such
            payments are made.

            As between the Indenture Trustee and the Owner, the insurance
payments for any property damage loss to the Airframe or any engine not
constituting an Event of Loss with respect thereto will be applied in payment
for repairs or for replacement property in accordance with the terms of Sections
7.02 and 7.03, if not already paid for by the Owner (or any Lessee), and any
balance (or if already paid for by the Owner (or any Lessee), all such insurance
proceeds) remaining after compliance with such Sections with respect to such
loss shall be paid to the Owner (or any Lessee if directed by the Owner).

            (II) During any period that the Aircraft is on the ground and not in
operation, the Owner may carry or cause to be carried, in lieu of the insurance
required by clause (I) above, insurance otherwise conforming with the provisions
of said clause (I) except that the scope of the risks and the type of insurance
shall be the same as from time to time applicable to aircraft owned or operated
by the Owner (or, if a Lease is then in effect, by Lessee) of the same type
similarly on the ground and not in operation, provided that the Owner shall
maintain insurance against risk of loss or damage to the Aircraft in an amount
equal to the Loan Loss Value of the Aircraft during such period that the
Aircraft is on the ground and not in operation.

            (c) Reports, etc. The Owner will furnish, or cause to be furnished,
to the Indenture Trustee, on or before the Closing Date and on or before July 1
in each year thereafter during the Term commencing July, _____, a report, signed
by Aon Risk Services, Inc., Aon Risk Services of Minnesota, Inc. or any other
independent firm of insurance brokers reasonably acceptable to the Indenture
Trustee (the "Insurance Brokers"), describing in reasonable detail the insurance
and reinsurance then carried and maintained with respect to the Aircraft and
stating the opinion of such firm that the insurance then carried and maintained
with respect to the Aircraft complies


                                      -45-
<PAGE>

with the terms hereof; provided, however, that all information contained in the
foregoing report shall not be made available by the Indenture Trustee or the
Loan Participants to anyone except (A) to permitted transferees of the Loan
Participants' or the Indenture Trustee who agree to hold such information
confidential, (B) to the Loan Participants' or the Indenture Trustee's counsel
or independent certified public accountants or independent insurance advisors
who agree to hold such information confidential or (C) as may be required by any
statute, court or administrative order or decree or governmental ruling or
regulation. The Owner will cause such Insurance Brokers to agree to advise the
Indenture Trustee in writing of any default in the payment of any premium and of
any other act or omission on the part of the Owner of which it has knowledge and
which might invalidate or render unenforceable, in whole or in part, any
insurance on the Aircraft. To the extent such agreement is reasonably
obtainable, the Owner will also cause such Insurance Brokers to agree to advise
the Indenture Trustee in writing at least thirty (30) days (seven (7) days in
the case of war risk and allied perils coverage), prior to the expiration or
termination date of any insurance carried and maintained on the Aircraft
pursuant to this Section 7.04. In addition, the Owner will also cause such
Insurance Brokers to deliver to the Indenture Trustee, on or prior to the date
of expiration of any insurance policy referenced in a previously delivered
certificate of insurance, a new certificate of insurance, substantially in the
same form as delivered by the Owner to such party on the Closing Date. In the
event that the Owner or any Lessee shall fail to maintain or cause to be
maintained insurance as herein provided, the Indenture Trustee may at its sole
option provide such insurance and, in such event, the Owner shall, upon demand,
reimburse the Indenture Trustee for the cost thereof to Indenture Trustee,
without waiver of any other rights Indenture Trustee may have.

            (d) Self-Insurance. The Owner may self-insure by way of deductible,
premium adjustment or franchise provisions or otherwise (including, with respect
to insurance maintained pursuant to Section 7.04(b), insuring for a maximum
amount which is less than the Loan Loss Value of the Aircraft) in the insurance
covering the risks required to be insured against pursuant to this Section 7.04
under a program applicable to all aircraft in the Owner's fleet, but in no case
shall the aggregate amount of self-insurance in regard to Section 7.04(a) and
Section 7.04(b) exceed during any policy year, with respect to all of the
aircraft in the Owner's fleet (including, without limitation, the Aircraft), the
lesser of (a) 50% of the largest replacement value of any single aircraft in the
Owner's fleet or (b) 1-1/2% of the average aggregate insurable value (during the
preceding policy year) of all aircraft (including, without limitation, the
Aircraft) on which the Owner carries insurance. In addition, the Owner (and any
Lessee) may self-insure to the extent of any applicable mandatory minimum per
aircraft (or, if applicable, per annum or other period) hull or liability
insurance deductible imposed by the aircraft hull or liability insurers.

            (e) Additional Insurance by the Owner. The Owner (and any Lessee)
may at its own expense carry insurance with respect to its interest in the
Aircraft in amounts in excess of that required to be maintained by this Section
7.04.

            (f) Indemnification by Government in Lieu of Insurance.
Notwithstanding any provisions of this Section 7.04 requiring insurance, the
Indenture Trustee agrees to accept, in lieu of insurance against any risk with
respect to the Aircraft, indemnification from, or insurance provided by, the
United States Government or any agency or instrumentality thereof or, upon the


                                      -46-
<PAGE>

written consent of the Indenture Trustee, other government of registry of the
Aircraft or any agency or instrumentality thereof, against such risk in an
amount which, when added to the amount of insurance against such risk maintained
by the Owner (or any Lessee) with respect to the Aircraft (including permitted
self-insurance) shall be at least equal to the amount of insurance against such
risk otherwise required by this Section 7.04.

            (g) Application of Payments During Existence of an Event of Default.
Any amount referred to in paragraph (b) of this Section 7.04 which is payable to
or retainable by the Owner (or any Lessee) shall not be paid to or retained by
the Owner (or any Lessee) if at the time of such payment or retention an Event
of Default shall have occurred and be continuing, but shall be held by or paid
over to the Indenture Trustee as security for the obligations of the Owner (or
any Lessee) under this Trust Indenture and applied against the Owner's
obligations hereunder as and when due. Upon the earlier of (a) such time as
there shall not be continuing any such Event of Default or (b) the termination
of this Trust Indenture in accordance with Section 11.01 hereof, such amount
shall be paid to the Owner (or such Lessee) to the extent not previously applied
in accordance with the preceding sentence.

            SECTION 7.05. Inspection.

            At all reasonable times and upon at least 15 days' prior written
notice to the Owner, the Indenture Trustee or its authorized representative may
(not more than once every calendar year (unless an Event of Default has occurred
and is continuing when such inspection right shall not be so limited)) inspect
the Aircraft and inspect and make copies (at the Indenture Trustee's expense) of
the books and records of the Owner relating to the maintenance of the Aircraft;
any such inspection of the Aircraft shall be limited to a visual, walk-around
inspection and shall not include opening any panels, bays or the like without
the express consent of the Owner; provided that no exercise of such inspection
right shall interfere with the operation or maintenance of the Aircraft by, or
the business of, the Owner (or any Lessee). The Indenture Trustee shall not have
any duty to make any such inspection nor shall it incur any liability or
obligation by reason of not making such inspection.

            SECTION 7.06. Loss, Destruction, Requisition, etc.

            (a) Event of Loss with Respect to the Aircraft. Upon the occurrence
of an Event of Loss with respect to the Airframe or the Airframe and the Engines
and/or engines then installed thereon, the Owner shall forthwith (and in any
event, within fifteen (15) days after such occurrence) give the Indenture
Trustee written notice of such Event of Loss, and within forty-five (45) days
after such Event of Loss the Owner shall give the Indenture Trustee written
notice of its election to perform one of the following options (it being agreed
that if the Owner shall not have given such notice of election within such
period, the Owner shall be deemed to have elected the option set forth in clause
(i) below). The Owner may elect either to:

                  (i) redeem the Secured Certificates in accordance with Section
            2.10 hereof not later than the earlier of (x) the Business Day next
            succeeding the 120th day following the occurrence of such Event of
            Loss or (y) an earlier Business Day irrevocably specified fifteen
            (15) days in advance by notice from the Owner to the


                                      -47-
<PAGE>

            Indenture Trustee; or

                  (ii) substitute an aircraft or an airframe or an airframe and
            one or more engines, as the case may be;

provided that, if the Owner does not perform its obligation to effect such
substitution in accordance with this Section 7.06(a) during the period of time
provided herein, then the Owner shall pay or cause to be paid to the Indenture
Trustee on the Business Day next succeeding the 120th day following the
occurrence of such Event of Loss the amount specified in clause (i) above.

            In the event the Owner shall elect to substitute an aircraft (or an
airframe or an airframe and one or more engines, as the case may be), the Owner
shall at its sole expense, not later than the Business Day next succeeding the
120th day following the occurrence of such Event of Loss, (x) cause to be
subjected to the Lien of this Trust Indenture, in replacement of the Airframe
with respect to which the Event of Loss occurred, a Replacement Airframe and, if
any Engine shall have been installed on the Airframe when it suffered an Event
of Loss, a Replacement Engine therefor, such Replacement Airframe and
Replacement Engines, if any, to be free and clear of all Liens (other than
Permitted Liens) and having a value, utility and remaining useful life (without
regard to hours or cycles) at least equal to the Airframe or Engine, as the case
may be, subject to such Event of Loss assuming no Event of Loss had occurred and
that the Aircraft had been maintained in accordance with this Trust Indenture;
provided that the Replacement Airframe and the Replacement Engines, if any,
shall be of the same or improved model as the Airframe or Engine, as the case
may be, that are replaced and (y) prior to or at the time of any such
substitution, the Owner (or any Lessee), at its own expense, will (1) furnish
the Indenture Trustee a copy of the original bill of sale respecting such
Replacement Airframe and the Replacement Engines, if any, and appropriate
instruments assigning to the Indenture Trustee the benefits, if any, of all
manufacturer's and vendor's warranties generally available and permitted to be
assigned by the Owner with respect to such Replacement Airframe and Replacement
Engines, if any, (2) cause a Trust Indenture Supplement to be duly executed by
the Owner and filed for recording pursuant to the Federal Aviation Act, or the
applicable laws, rules and regulations of any other jurisdiction in which the
Replacement Airframe and Replacement Engines, if any, may then be registered as
permitted by Section 8(f) of the Participation Agreement, (3) cause a financing
statement or statements with respect to such Replacement Airframe and
Replacement Engines, if any, to be filed in such place or places as are deemed
necessary or desirable by counsel for the Indenture Trustee to perfect the
Indenture Trustee's interest therein, (4) furnish the Indenture Trustee with
such evidence of compliance with the insurance provisions of Section 7.04 with
respect to such Replacement Airframe and Replacement Engines, if any, as the
Indenture Trustee's counsel may reasonably request, (5) furnish the Indenture
Trustee with (A) an opinion of in-house counsel to the Owner, or other counsel
satisfactory to the Indenture Trustee, stating that the Replacement Airframe and
Replacement Engines, if any, has or have been validly subjected to the Lien of
this Trust Indenture, the instruments subjecting such Replacement Airframe and
Replacement Engines, if any, to the Lien of this Trust Indenture, have been duly
filed for recordation pursuant to the Federal Aviation Act or any other law then
applicable to the registration of the Replacement


                                      -48-
<PAGE>

Airframe and Replacement Engines, if any, and no further action, filing or
recording of any document is necessary or advisable in order to establish and
perfect the Lien of this Trust Indenture on such Replacement Airframe and
Replacement Engines, if any (B) a certificate signed by a duly authorized
officer of the Owner stating the following: (i) a description of the replaced
Airframe and Engines, if any, which shall be identified by manufacturer, model,
FAA registration number (or other applicable registration information) and
manufacturer's serial number; (ii) a description of the Replacement Airframe and
Replacement Engines, if any, to be received (including the manufacturer, model,
FAA registration number (or other applicable registration information) and
manufacturer's serial number) as consideration for the replaced Airframe and
Engines, if any; (iii) that the Replacement Airframe and Replacement Engines, if
any, is or are of the same or an improved model as the Airframe and Engines, if
any, requested to be released from this Trust Indenture; (iv) the value, utility
and remaining useful life (without regard to hours or cycles) of the Replacement
Airframe and Replacement Engines, if any, as of the date of such certificate
(which in the judgment of the Owner shall be not less than the value, utility
and remaining useful life (without regard to hours or cycles) of the Airframe
and Engines, if any, requested to be released (assuming no Event of Loss and
that such Airframe and Engines, if any, was or were in the condition and repair
required to be maintained under this Trust Indenture)); and (v) that no Event of
Default or Default has occurred which has not been remedied or waived, and that
the Owner will not be in default, by the making and granting of the request for
release and the addition of a Replacement Airframe and Replacement Engines, if
any, in the performance of any of the terms and covenants of the Owner, and (C)
a certificate from either an aircraft engineer (who may be an employee of the
Owner) or a firm of independent aircraft appraisers selected by the Owner
confirming the accuracy of the information set forth in sub-clause (iv) of the
immediately preceding clause (5)(B) of this Section 7.06(a), and (6) furnish the
Indenture Trustee with an opinion of counsel (which shall be Cadwalader,
Wickersham & Taft and, if not, other counsel chosen by the Owner and reasonably
acceptable to the Indenture Trustee) reasonably satisfactory to the Indenture
Trustee to the effect that the Indenture Trustee will be entitled to the
benefits of Section 1110 of the U.S. Bankruptcy Code with respect to the
Replacement Airframe, provided that such opinion need not be delivered to the
extent that immediately prior to such substitution the benefits of Section 1110
of the U.S. Bankruptcy Code were not, solely by reason of a change in law or
governmental interpretation thereof, available to the Indenture Trustee. For all
purposes hereof, the property so substituted shall after such transfer be deemed
part of the property subject to the Lien of this Trust Indenture and shall be
deemed an "Aircraft", "Airframe" and "Engine", as the case may be, as defined
herein.

            Upon the Owner having provided a Replacement Airframe and
Replacement Engines, if any, as provided for in this Section 7.06(a), (x) the
Lien of this Trust Indenture shall continue with respect to such Replacement
Airframe and Replacement Engines, if any, as though no Event of Loss had
occurred; the Indenture Trustee shall, at the cost and expense of the Owner,
release from the Lien of this Trust Indenture the replaced Airframe and Engines,
if any, with respect to which such Event of Loss occurred, by executing and
delivering to the Owner such documents and instruments, prepared at the Owner's
expense, as the Owner may reasonably request to evidence such release; and (y)
the Indenture Trustee shall assign to the Owner all claims it may have against
any other Person arising from the Event of Loss and the Owner shall receive all
insurance proceeds and proceeds from any award in respect of condemnation,


                                      -49-
<PAGE>

confiscation, seizure or requisition, including any investment interest thereon,
to the extent not previously applied to the purchase price of the Replacement
Airframe and Replacement Engines, if any, as provided in Sections 7.04(b) and
7.06(c)(i) hereof.

            (b) Substitution with Respect to an Engine. The Owner shall (i) so
long as no Default or Event of Default has occurred which has not been remedied
or waived, have the right to substitute a Replacement Engine for any Engine at
its option at any time, on at least thirty (30) days' prior written notice to
the Indenture Trustee and (ii) substitute a Replacement Engine for an Engine if
an Event of Loss shall have occurred with respect to such Engine (under
circumstances in which there has not occurred an Event of Loss with respect to
the Airframe) within sixty (60) days after the occurrence of such Event of Loss
(such Replacement Engine to be of the same or another manufacturer of the same,
an equivalent or an improved model and suitable for installation and use on the
Airframe without impairing the value, utility or remaining useful life of the
Aircraft; provided that both Engines shall be of the same make and model) free
and clear of all Liens (other than Permitted Liens) and having a value, utility
and remaining useful life (without regard to hours or cycles) at least equal to
the replaced Engine assuming no Event of Loss had occurred and that such
replaced Engine had been maintained in accordance with the provisions of this
Trust Indenture. Prior to or at the time of any such substitution, the Owner, at
its own expense, will (1) furnish the Indenture Trustee with (A) a copy of the
original bill of sale with respect to such Replacement Engine and (B)
appropriate instruments assigning to the Indenture Trustee the benefits, if any,
of all manufacturer's and vendor's warranties generally available and permitted
to be assigned by the Owner with respect to such Replacement Engine, (2) cause a
Trust Indenture Supplement to be duly executed by the Owner and to be filed for
recording pursuant to the Federal Aviation Act, or the applicable laws, rules
and regulations of any other jurisdiction in which the Aircraft may then be
registered as permitted by Section 8(f) of the Participation Agreement, (3)
cause a financing statement or statements covering the Lien created by this
Trust Indenture with respect to the Replacement Engine to be filed in such place
or places as are deemed necessary or desirable by counsel for the Indenture
Trustee to perfect the Indenture Trustee's interest therein, (4) furnish the
Indenture Trustee with such evidence of compliance with the insurance provisions
of Section 7.04 hereof with respect to such Replacement Engine as the Indenture
Trustee may reasonably request, and (5) furnish the Indenture Trustee with (A)
an opinion of in-house counsel to the Owner, or other counsel satisfactory to
the Indenture Trustee, stating that the Replacement Engine has been validly
subjected to the Lien of this Trust Indenture, the instruments subjecting such
Replacement Engine to the Lien of this Trust Indenture have been duly filed for
recordation pursuant to the Federal Aviation Act or any other law then
applicable to the registration of the Aircraft, and no further action, filing or
recording of any document is necessary or advisable in order to establish and
perfect the Lien of this Trust Indenture on such Replacement Engine and (B) a
certificate signed by a duly authorized officer of the Owner stating the
following: (i) a description of the replaced Engine which shall be identified by
manufacturer's serial number; (ii) a description of the Replacement Engine
(including the manufacturer's name and serial number) as consideration for the
replaced Engine; (iii) that such Replacement Engine is substantially the same as
the replaced Engine (or an improved model); and (iv) the value, utility and
remaining useful


                                      -50-
<PAGE>

life (without regard to hours or cycles) of the Replacement Engine as of the
date of such certificate (which in the judgment of the Owner shall not be less
than the value, utility and remaining useful life (without regard to hours or
cycles) of the Engine requested to be released (assuming no Event of Loss and
that such Engine was in the condition and repair required to be maintained under
this Trust Indenture).

            Upon the Owner having provided a Replacement Engine, as provided for
in this Section 7.06(b), (x) the Lien of this Trust Indenture shall continue
with respect to such Replacement Engine; the Indenture Trustee shall, at the
cost and expense of the Owner, release from the Lien of this Trust Indenture the
replaced Engine by executing and delivering to the Owner such documents and
instruments, prepared at the Owner's expense, as the Owner may reasonably
request to evidence such release; and (y) the Indenture Trustee shall assign to
the Owner all claims it may have against any other Person arising from an Event
of Loss of such replaced Engine giving rise to such substitution and the Owner
shall receive all insurance proceeds and proceeds from any award in respect of
condemnation, confiscation, seizure or requisition, including any investment
interest thereon, to the extent not previously applied to the purchase price of
the Replacement Engine, as provided in Sections 7.04(b) and 7.06(c)(ii) hereof.
For all purposes hereof, each such Replacement Engine shall, after such
conveyance, be deemed part of the property subject to the Lien of this Trust
Indenture, and shall be deemed an "Engine".

            (c) Application of Payments from Governmental Authorities for
Requisition of Title, etc. Any payments (other than insurance proceeds the
application of which is provided for in Section 7.04) received at any time by
the Indenture Trustee or by the Owner from any governmental authority or other
Person with respect to an Event of Loss will be applied as follows:

                  (i) if payments are received with respect to the Airframe (or
            the Airframe and any Engine then installed thereon), that has been
            or is being replaced by the Owner as contemplated by Section 7.06(a)
            hereof, such payments shall be paid over to, or retained by the
            Indenture Trustee as security and upon completion of such
            replacement and compliance by the Owner with the provisions of
            Section 7.06(a) with respect to the Event of Loss for which such
            payments are made, be paid over to the Owner;

                  (ii) if such payments are received with respect to the
            Airframe (or the Airframe and any Engines installed thereon) or an
            Engine or Part (not involving an Event of Loss as to the Airframe)
            that has been or is being replaced by the Owner pursuant to Section
            7.06(b) hereof, such payments shall be paid over to, or retained by,
            the Owner; and

                  (iii) if such payments are received with respect to the
            Airframe (or the Airframe and any Engines installed thereon) that
            has not been replaced by the Owner as contemplated by Section
            7.06(a) hereof, so much of such payments remaining, after
            reimbursement of the Indenture Trustee for reasonable costs and
            expenses as shall not exceed the Balance Due, shall be applied in
            reduction of the Owner's obligation to pay such Balance Due, if not
            already paid by the Owner, or, if already paid by the Owner, shall
            be applied to reimburse the Owner for its


                                      -51-
<PAGE>

            payment of such Balance Due, and the balance, if any, of such
            payments remaining thereafter will be paid over to, or retained by,
            the Owner (or if directed by the Owner, any Lessee).

            (d) Requisition for Use of the Aircraft. In the event of the
requisition for use by any government or any instrumentality or agency thereof,
so long as it does not constitute an Event of Loss, of the Airframe and the
Engines or engines installed on the Airframe, so long as the Airframe or an
Engine is subject to the Lien of this Trust Indenture, the Owner shall promptly
notify the Indenture Trustee of such requisition, and all of the Owner's
obligations under this Trust Indenture with respect to the Aircraft shall
continue to the same extent as if such requisition had not occurred. All
payments received by the Indenture Trustee or the Owner from such government or
instrumentality or agency thereof for the use of such Airframe and Engines or
engines shall be paid over to, or retained by, the Owner (or, if directed by the
Owner, any Lessee).

            (e) Requisition for Use of an Engine. In the event of an Event of
Loss of an Engine resulting from the requisition for use of such Engine (but not
the Airframe) by any government or agency or instrumentality the Owner will
replace such Engine hereunder by complying (or causing any Lessee to comply)
with the terms of Section 7.06(b) hereof and any payments received by the
Indenture Trustee or the Owner from such government with respect to such
requisition shall be paid over to, or retained by, the Owner.

            (f) Application of Payments During Existence of Event of Default.
Any amount referred to in this Section 7.06 which is payable to or retainable by
the Owner (or any Lessee) shall not be paid to or retained by the Owner (or such
Lessee) if at the time of such payment or retention an Event of Default shall
have occurred and be continuing, but shall be held by or paid over to the
Indenture Trustee as security for the obligations of the Owner (or such Lessee)
under this Trust Indenture and applied against the Owner's obligations hereunder
as and when due. Upon the earlier of (a) such time as there shall not be
continuing any such Event of Default or (b) the termination of this Trust
Indenture in accordance with Section 11.01 hereof, such amount shall be paid to
the Owner (or such Lessee) to the extent not previously applied in accordance
with the preceding sentence.

            SECTION 7.07. Interests in the Purchase Agreement.

            The grant by the Owner to the Indenture Trustee of the Owner's
interests in and to the Contract Rights as set forth in clause (b) of the
Granting Clause hereof is subject to the following:

            (a) With respect to the assignment contained in clause (b) of the
Granting Clause, if and so long as (A) the Aircraft shall be subject to this
Trust Indenture and (B) no Event of Default under this Trust Indenture has
occurred and is continuing, (1) the Indenture Trustee authorizes the Owner, on
behalf of but to the exclusion of the Indenture Trustee, to exercise in the
Owner's own name (i) all rights and powers related to the Assigned Warranties
and the Guaranty as it relates to the Assigned Warranties and (ii) subject to
paragraph 7.07(c) hereof, to retain any recovery or benefit resulting from the
enforcement of any Assigned Warranties in


                                      -52-
<PAGE>

respect of the Aircraft or resulting from the enforcement of the Guaranty in
respect of the same, and (2) the Indenture Trustee shall, at the Owner's
expense, cooperate with the Owner and take such actions as the Owner reasonably
deems necessary to enable the Owner to enforce such rights and claims.

            (b) In the event that an Event of Default under this Trust Indenture
has occurred and is continuing and thereafter until such Event of Default has
been cured or waived: (i) at the Indenture Trustee's option, the authorization
given to the Owner under paragraph 7.07(a) hereof to enforce such rights and
claims shall henceforth cease to be effective and the Indenture Trustee and its
successors and permitted assigns shall, to the exclusion of the Owner, be
entitled to assert and enforce such rights and claims as substitute party
plaintiff or otherwise, and the Owner shall, at the request of the Indenture
Trustee or its successors or permitted assigns and at the Owner's expense,
cooperate with and take such action as reasonably necessary to enable the
Indenture Trustee and its successors and permitted assigns to enforce such
rights and claims, and the Indenture Trustee, if it shall elect to enforce such
rights or claims, shall use its best efforts to assert and enforce such rights
and claims, and (ii) the Owner will be deemed to have irrevocably constituted
the Indenture Trustee and its successors and permitted assigns the Owner's true
and lawful attorney (it being acknowledged that such appointment is coupled with
an interest, namely the Indenture Trustee's rights acquired and to be acquired
hereunder) with full power (in the name of the Owner or otherwise) to ask,
require, demand, receive, settle, compromise, compound and give acquittance for
any and all monies and claims for monies due and to become due under, or arising
out of, the Purchase Agreement in respect of the Aircraft, to the extent that
the same have been assigned pursuant to clause (b) of the Granting Clause
hereof, and for such period as the Indenture Trustee may exercise rights with
respect thereto under this clause (ii), to endorse any checks or other
instruments or orders in connection therewith and to file any claims or take any
action or institute (or, if previously commenced, assume control of) any
proceedings and to obtain any recovery in connection therewith which the
Indenture Trustee may deem to be necessary or advisable in the premises.

            (c) Notwithstanding clause (b) of the Granting Clause hereof, this
Section 7.07 and anything in this Trust Indenture to the contrary (but subject
to all the terms of the Purchase Agreement), all amounts that the Supplier or
the Manufacturer is obligated to pay to the Owner under Clauses 12, 13 and, to
the extent relating to acts to be performed following the date of enforcement of
this Indenture, 17 of the Purchase Agreement with respect to the Aircraft or the
Guaranty as it relates to such Clauses (a "Supplier Payment"), will be payable
and applicable as follows: so long as the Aircraft is subject to this Trust
Indenture, all Supplier Payments shall be paid to the Owner unless and until an
Event of Default under this Trust Indenture has occurred and is continuing,
whereupon the Indenture Trustee shall direct the Supplier to make all Supplier
Payments directly to the Indenture Trustee until all Events of Default under
this Trust Indenture have been cured or waived. Any amounts received by the
Indenture Trustee pursuant to the immediately preceding sentence shall, to the
extent not theretofore applied in satisfaction of the Secured Obligations, be
returned to the Owner promptly after all Events of Default under this Trust
Indenture have been cured or waived.

            (d) Anything herein contained to the contrary notwithstanding: (i)
the Owner shall at


                                      -53-
<PAGE>

all times remain liable to the Manufacturer under the Purchase Agreement in
respect of the Aircraft to perform all of the duties and obligations of
"Northwest" thereunder to the same extent as if this Trust Indenture had not
been executed; (ii) the exercise by the Indenture Trustee of any of the rights
assigned hereunder shall not release the Owner from any of its duties or
obligations to the Supplier under the Purchase Agreement in respect of the
Aircraft except to the extent that such exercise by the Indenture Trustee shall
constitute performance of such duties and obligations; and (iii) except as
provided in paragraph (e) of this Section 7.07, the Indenture Trustee shall not
have any obligation or liability under the Purchase Agreement by reason of, or
arising out of, this Trust Indenture or be obligated to perform any of the
obligations or duties of the Owner under the Purchase Agreement or to make any
payment or make any inquiry as to the sufficiency of any payment received by it
or to present or to file any claim or to take any other action to collect or
enforce any claim for any payment assigned hereunder.

            (e) Without in any way releasing the Owner from any of its duties or
obligations under the Purchase Agreement, the Indenture Trustee confirms for the
benefit of the Supplier and the Manufacturer that, insofar as the provisions of
the Purchase Agreement relate to the Aircraft, in exercising any rights under
the Purchase Agreement or the Guaranty, or in making any claim with respect to
the Aircraft or other things delivered or to be delivered pursuant to the
Purchase Agreement or the Guaranty, the terms and conditions of the Purchase
Agreement and the Guaranty shall apply to, and be binding upon, the Indenture
Trustee to the same extent as the Owner. The Indenture Trustee hereby confirms
that it shall be deemed for all purposes to have read and be familiar with the
Purchase Agreement and the Guaranty and to understand thoroughly the terms and
conditions thereof.

            (f) Nothing contained in this Trust Indenture shall (i) subject the
Supplier or the Manufacturer to any liability to which it would not otherwise be
subject under the Purchase Agreement or the Guaranty or (ii) modify in any
respect the Supplier's or the Manufacturer's contract rights thereunder, except
as provided in the Consent and Agreement.

            (g) For all purposes of the assignment contained in clause (b) of
the Granting Clause, the Supplier and the Manufacturer shall not be deemed to
have knowledge of and need not recognize any Event of Default, unless and until
the Supplier shall have received written notice thereof from the Indenture
Trustee at the address for the Supplier set forth in Section 11.05 hereof and,
in acting in accordance with the terms of the Purchase Agreement, the Guaranty
and the assignment contained in clause (b) of the Granting Clause, the Supplier
and the Manufacturer may act with acquittance and conclusively rely upon such
notice.

                                  ARTICLE VIII

                                 INDEMNIFICATION

            SECTION 8.01. Scope of Indemnification.

            The Owner hereby agrees, except as otherwise provided in Section
2.03 hereof, to assume liability for, and does hereby indemnify, protect, save
and keep harmless the Indenture


                                      -54-
<PAGE>

Trustee (in its individual and trust capacities), and its successors, assigns,
agents and servants, from and against any and all liabilities, obligations,
losses, damages, penalties, taxes (excluding any taxes payable by the Indenture
Trustee on or measured by any compensation received by the Indenture Trustee for
its services under this Trust Indenture), claims, actions, suits, costs,
expenses or disbursements (including reasonable legal fees and expenses) of any
kind and nature whatsoever, which may be imposed on, incurred by or asserted
against the Indenture Trustee (whether or not also indemnified against by any
other Person under any other document) in any way relating to or arising out of
this Trust Indenture or any other Operative Document to which it is a party or
the enforcement of any of the terms of any thereof, or in any way relating to or
arising out of the manufacture, purchase, acceptance, non-acceptance, rejection,
ownership, delivery, lease, possession, use, operation, condition, sale, return
or other disposition of the Aircraft or any Engine (including, without
limitation, latent or other defects, whether or not discoverable, and any claim
for patent, trademark or copyright infringement), or in any way relating to or
arising out of the administration of the Collateral or the action or inaction of
the Indenture Trustee hereunder. Without limiting the foregoing, the Indenture
Trustee agrees that, prior to seeking indemnification from the Collateral, it
will demand, and take such action as it may in its discretion determine to be
reasonable to pursue, indemnification available to the Indenture Trustee under
the Participation Agreement. Notwithstanding the foregoing, the Indenture
Trustee shall not be entitled to any indemnification for any Taxes or Expenses
to the extent relating to or arising from the willful misconduct or gross
negligence (or negligence in the case of handling funds) of the Indenture
Trustee in the performance of its duties hereunder or resulting from the
inaccuracy of any representation or warranty of the Indenture Trustee (in its
individual capacity) referred to in Section 6.03 hereof, or as provided in
Section 6.01 hereof or in the last sentence of Section 5.04 hereof, or as
otherwise excluded by the terms of Sections 7(b) and 7(c) of the Participation
Agreement from the Owner's indemnities under such Sections. In addition, if
necessary, the Indenture Trustee shall be entitled to indemnification from the
Collateral for any liability, obligation, loss, damage, penalty, claim, action,
suit, cost, expense or disbursement indemnified against pursuant to this Section
8.01 to the extent not reimbursed by others, but without releasing any of them
from their respective agreements of reimbursement; and to secure the same the
Indenture Trustee shall have a prior Lien on the Collateral.

                                   ARTICLE IX

                         SUCCESSOR AND SEPARATE TRUSTEES

            SECTION 9.01. Resignation of Indenture Trustee; Appointment of
Successor.

            (a) The Indenture Trustee or any successor thereto may resign at any
time without cause by giving at least 30 days' prior written notice to the Owner
and each Certificate Holder, such resignation to be effective upon the
acceptance of the trusteeship by a successor Indenture Trustee. In addition, a
Majority in Interest of Certificate Holders may at any time (but only with the
consent of the Owner, which consent shall not be unreasonably withheld, except
that such consent shall not be necessary if an Event of Default is continuing)
remove the Indenture Trustee without cause by an instrument in writing delivered
to the Owner and the Indenture Trustee, and the Indenture Trustee shall promptly
notify each Certificate Holder thereof in writing, such


                                      -55-
<PAGE>

removal to be effective upon the acceptance of the trusteeship by a successor
Indenture Trustee. In the case of the resignation or removal of the Indenture
Trustee, a Majority in Interest of Certificate Holders may appoint a successor
Indenture Trustee by an instrument signed by such holders, which successor, so
long as no Event of Default shall have occurred and be continuing, shall be
subject to the Owner's reasonable approval. If a successor Indenture Trustee
shall not have been appointed within 30 days after such notice of resignation or
removal, the Indenture Trustee, the Owner or any Certificate Holder may apply to
any court of competent jurisdiction to appoint a successor Indenture Trustee to
act until such time, if any, as a successor shall have been appointed as above
provided. The successor Indenture Trustee so appointed by such court shall
immediately and without further act be superseded by any successor Indenture
Trustee appointed as above provided.

            (b) Any successor Indenture Trustee, however appointed, shall
execute and deliver to the Owner and the predecessor Indenture Trustee an
instrument accepting such appointment and assuming the obligations of the
Indenture Trustee under the Participation Agreement arising from and after the
time of such appointment, and thereupon such successor Indenture Trustee,
without further act, shall become vested with all the estates, properties,
rights, powers and duties of the predecessor Indenture Trustee hereunder in the
trust hereunder applicable to it with like effect as if originally named the
Indenture Trustee herein; but nevertheless upon the written request of such
successor Indenture Trustee, such predecessor Indenture Trustee shall execute
and deliver an instrument transferring to such successor Indenture Trustee, upon
the trusts herein expressed applicable to it, all the estates, properties,
rights and powers of such predecessor Indenture Trustee, and such predecessor
Indenture Trustee shall duly assign, transfer, deliver and pay over to such
successor Indenture Trustee all monies or other property then held by such
predecessor Indenture Trustee hereunder.

            (c) Any successor Indenture Trustee, however appointed, shall be a
bank or trust company having its principal place of business in the Borough of
Manhattan, City and State of New York; Minneapolis, Minnesota; Chicago,
Illinois; Hartford, Connecticut; Wilmington, Delaware; or Boston, Massachusetts
and having (or whose obligations under the Operative Documents are guaranteed by
an affiliated entity having) a combined capital and surplus of at least
$100,000,000, if there be such an institution willing, able and legally
qualified to perform the duties of the Indenture Trustee hereunder upon
reasonable or customary terms.

            (d) Any corporation into which the Indenture Trustee may be merged
or converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Indenture Trustee
shall be a party, or any corporation to which substantially all the corporate
trust business of the Indenture Trustee may be transferred, shall, subject to
the terms of paragraph (c) of this Section 9.01, be a successor Indenture
Trustee and the Indenture Trustee under this Trust Indenture without further
act.

            SECTION 9.02. Appointment of Additional and Separate Trustees.

            (a) Whenever (i) the Indenture Trustee shall deem it necessary or
desirable in order to conform to any law of any jurisdiction in which all or any
part of the Collateral shall be situated


                                      -56-
<PAGE>

or to make any claim or bring any suit with respect to or in connection with the
Collateral, this Trust Indenture, any other Indenture Agreement, the Secured
Certificates or any of the transactions contemplated by the Participation
Agreement, (ii) the Indenture Trustee shall be advised by counsel satisfactory
to it that it is so necessary or prudent in the interests of the Certificate
Holders (and the Indenture Trustee shall so advise the Owner), or (iii) the
Indenture Trustee shall have been requested to do so by a Majority in Interest
of Certificate Holders, then in any such case, the Indenture Trustee and, upon
the written request of the Indenture Trustee, the Owner, shall execute and
deliver an indenture supplemental hereto and such other instruments as may from
time to time be necessary or advisable either (1) to constitute one or more bank
or trust companies or one or more persons approved by the Indenture Trustee,
either to act jointly with the Indenture Trustee as additional trustee or
trustees of all or any part of the Collateral, or to act as separate trustee or
trustees of all or any part of the Collateral, in each case with such rights,
powers, duties and obligations consistent with this Trust Indenture as may be
provided in such supplemental indenture or other instruments as the Indenture
Trustee or a Majority in Interest of Certificate Holders may deem necessary or
advisable, or (2) to clarify, add to or subtract from the rights, powers, duties
and obligations theretofore granted any such additional and separate trustee,
subject in each case to the remaining provisions of this Section 9.02. If the
Owner shall not have taken any action requested of it under this Section 9.02(a)
that is permitted or required by its terms within 15 days after the receipt of a
written request from the Indenture Trustee so to do, or if an Event of Default
shall have occurred and be continuing, the Indenture Trustee may act under the
foregoing provisions of this Section 9.02(a) without the concurrence of the
Owner; and the Owner hereby irrevocably appoints (which appointment is coupled
with an interest) the Indenture Trustee, its agent and attorney-in-fact to act
for it under the foregoing provisions of this Section 9.02(a) in either of such
contingencies. The Indenture Trustee may, in such capacity, execute, deliver and
perform any such supplemental indenture, or any such instrument, as may be
required for the appointment of any such additional or separate trustee or for
the clarification of, addition to or subtraction from the rights, powers, duties
or obligations theretofore granted to any such additional or separate trustee.
In case any additional or separate trustee appointed under this Section 9.02(a)
shall die, become incapable of acting, resign or be removed, all the assets,
property, rights, powers, trusts, duties and obligations of such additional or
separate trustee shall revert to the Indenture Trustee until a successor
additional or separate trustee is appointed as provided in this Section 9.02(a).

            (b) No additional or separate trustee shall be entitled to exercise
any of the rights, powers, duties and obligations conferred upon the Indenture
Trustee in respect of the custody, investment and payment of monies and all
monies received by any such additional or separate trustee from or constituting
part of the Collateral or otherwise payable under any Operative Document to the
Indenture Trustee shall be promptly paid over by it to the Indenture Trustee.
All other rights, powers, duties and obligations conferred or imposed upon any
additional or separate trustee shall be exercised or performed by the Indenture
Trustee and such additional or separate trustee jointly except to the extent
that applicable Law of any jurisdiction in which any particular act is to be
performed renders the Indenture Trustee incompetent or unqualified to perform
such act, in which event such rights, powers, duties and obligations (including
the holding of title to all or part of the Collateral in any such jurisdiction)
shall be exercised and performed by such additional or separate trustee. No
additional or separate trustee shall take any


                                      -57-
<PAGE>

discretionary action except on the instructions of the Indenture Trustee or a
Majority in Interest of Certificate Holders. No trustee hereunder shall be
personally liable by reason of any act or omission of any other trustee
hereunder, except that the Indenture Trustee shall be liable for the
consequences of its lack of reasonable care in selecting, and Indenture
Trustee's own actions in acting with, any additional or separate trustee. Each
additional or separate trustee appointed pursuant to this Section 9.02 shall be
subject to, and shall have the benefit of Articles IV, V, VI, VIII, IX and XI
hereof insofar as they apply to the Indenture Trustee. The powers of any
additional or separate trustee appointed pursuant to this Section 9.02 shall not
in any case exceed those of the Indenture Trustee hereunder.

            (c) If at any time the Indenture Trustee shall deem it no longer
necessary or desirable in order to conform to any such law or take any such
action or shall be advised by such counsel that it is no longer so necessary or
desirable in the interest of the Certificate Holders, or in the event that the
Indenture Trustee shall have been requested to do so in writing by a Majority in
Interest of Certificate Holders, the Indenture Trustee and, upon the written
request of the Indenture Trustee, the Owner, shall execute and deliver an
indenture supplemental hereto and all other instruments and agreements necessary
or proper to remove any additional or separate trustee. The Indenture Trustee
may act on behalf of the Owner under this Section 9.02(c) when and to the extent
it could so act under Section 9.02(a) hereof.

                                   ARTICLE X

                SUPPLEMENT AND AMENDMENTS TO THIS TRUST INDENTURE
                               AND OTHER DOCUMENTS

            SECTION 10.01. Instructions of Majority; Limitations.

            (a) The Indenture Trustee agrees with the Certificate Holders that
it shall not enter into any amendment, waiver or modification of, supplement or
consent to the Purchase Agreement, the Consent and Agreement, this Trust
Indenture, the Guarantee or the Participation Agreement, or any other agreement
included in the Collateral, unless such supplement, amendment, waiver,
modification or consent is consented to in writing by a Majority in Interest of
Certificate Holders, or does not adversely affect the Certificate Holders, but
upon the written request of a Majority in Interest of Certificate Holders, the
Indenture Trustee shall from time to time enter into any such supplement or
amendment, or execute and deliver any such waiver, modification or consent, as
may be specified in such request and as may be (in the case of any such
amendment, supplement or modification), to the extent such agreement is
required, agreed to by the Owner or, as may be appropriate, the Manufacturer;
provided, however, that, without the consent of each holder of an affected
Secured Certificate then outstanding, no such amendment of or supplement to this
Trust Indenture, the Purchase Agreement, the Consent and Agreement, the
Guarantee or the Participation Agreement or waiver or modification of the terms
of, or consent under, any thereof, shall (i) modify any of the provisions of
this Section 10.01, or of Sections 2.02, 2.10, 2.11, 2.15, 4.02, 4.02(c),
4.02(d), 5.02, 7.06(a) or 7.06(b) hereof, the definitions of "Event of Default",
"Default", "Majority in Interest of Certificate Holders", "Make-Whole Amount" or
"Certificate Holder", or the percentage of Certificate Holders required


                                      -58-
<PAGE>

to take or approve any action hereunder, (ii) reduce the amount, or change the
time of payment or method of calculation of any amount, of Principal Amount,
Make-Whole Amount, if any, or interest with respect to any Secured Certificate,
or alter or modify the provisions of Article III hereof with respect to the
order of priorities in which distribution thereunder shall be made as among the
Certificate Holders and the Owner, (iii) reduce, modify or amend any indemnities
in favor of the Certificate Holders or (iv) permit the creation of any Lien on
the Collateral or any part thereof other than Permitted Liens or deprive any
Certificate Holder of the benefit of the Lien of this Trust Indenture on the
Collateral, except as provided in connection with the exercise of remedies under
Article IV hereof.

            (b) The Owner and the Indenture Trustee may enter into one or more
agreements supplemental hereto without the consent of any Certificate Holder for
any of the following purposes: (i) (a) to cure any defect or inconsistency
herein or in the Secured Certificates, or to make any change not inconsistent
with the provisions hereof (provided that such change does not adversely affect
the interests of any Certificate Holder in its capacity solely as Certificate
Holder) or (b) to cure any ambiguity or correct any mistake; (ii) to evidence
the succession of another party as the Owner in accordance with the terms of the
hereof or to evidence the succession of a new trustee hereunder pursuant hereto,
the removal of the trustee hereunder or the appointment of any co-trustee or
co-trustees or any separate or additional trustee or trustees; (iii) to convey,
transfer, assign, mortgage or pledge any property to or with the Indenture
Trustee or to make any other provisions with respect to matters or questions
arising hereunder so long as such action shall not adversely affect the
interests of the Certificate Holders in its capacity solely as Certificate
Holder; (iv) to correct or amplify the description of any property at any time
subject to the Lien of this Trust Indenture or better to assure, convey and
confirm unto the Indenture Trustee any property subject or required to be
subject to the Lien of this Trust Indenture, the Airframe or Engines or any
Replacement Airframe or Replacement Engine; (v) to add to the covenants of the
Owner for the benefit of the Certificate Holders, or to surrender any rights or
power herein conferred upon the Owner; (vi) to add to the rights of the
Certificate Holders; and (vii) to include on the Secured Certificates any legend
as may be required by law.

            SECTION 10.02. Indenture Trustee Protected.

            If, in the opinion of the institution acting as Indenture Trustee
hereunder, any document required to be executed by it pursuant to the terms of
Section 10.01 hereof adversely affects any right, duty, immunity or indemnity
with respect to such institution under this Trust Indenture, such institution
may in its discretion decline to execute such document.

            SECTION 10.03. Documents Mailed to Certificate Holders.

            Promptly after the execution by the Owner or the Indenture Trustee
of any document entered into pursuant to Section 10.01 hereof, the Indenture
Trustee shall mail, by first class mail, postage prepaid, a copy thereof to the
Owner and to each Certificate Holder at its address last set forth in the
Secured Certificate Register, but the failure of the Indenture Trustee to mail
such copies shall not impair or affect the validity of such document.

            SECTION 10.04. No Request Necessary for Trust Indenture Supplement.


                                      -59-
<PAGE>

            No written request or consent of the Indenture Trustee or the
Certificate Holders pursuant to Section 10.01 hereof shall be required to enable
the Owner to execute and deliver a Trust Indenture Supplement specifically
required by the terms hereof.

                                   ARTICLE XI

                                  MISCELLANEOUS

            SECTION 11.01. Termination of Trust Indenture.

            Upon (or at any time after) payment in full of the Principal Amount
of, Make-Whole Amount, if any, and interest on and all other amounts due under
all Secured Certificates and provided that there shall then be no other Secured
Obligations due to the Certificate Holders and the Indenture Trustee hereunder
or under the Participation Agreement, the Owner shall direct the Indenture
Trustee to execute and deliver to or as directed in writing by the Owner an
appropriate instrument releasing the Aircraft and the Engines from the Lien of
this Trust Indenture and releasing the Guarantee and the Purchase Agreement from
the assignment and pledge thereof hereunder and the Indenture Trustee shall
execute and deliver such instrument as aforesaid and give written notice thereof
to the Owner; provided, however, that this Trust Indenture and the trusts
created hereby shall earlier terminate and this Trust Indenture shall be of no
further force or effect upon any sale or other final disposition by the
Indenture Trustee of all property constituting part of the Collateral and the
final distribution by the Indenture Trustee of all monies or other property or
proceeds constituting part of the Collateral in accordance with the terms
hereof. Except as aforesaid otherwise provided, this Trust Indenture and the
trusts created hereby shall continue in full force and effect in accordance with
the terms hereof.

            SECTION 11.02. No Legal Title to Collateral in Certificate Holders.

            No holder of a Secured Certificate shall have legal title to any
part of the Collateral. No transfer, by operation of law or otherwise, of any
Secured Certificate or other right, title and interest of any Certificate Holder
in and to the Collateral or hereunder shall operate to terminate this Trust
Indenture or entitle such holder or any successor or transferee of such holder
to an accounting or to the transfer to it of any legal title to any part of the
Collateral.

            SECTION 11.03. Sale of Aircraft by Indenture Trustee Is Binding.

            Any sale or other conveyance of the Collateral, or any part thereof
(including any part thereof or interest therein), by the Indenture Trustee made
pursuant to the terms of this Trust Indenture shall bind the Certificate Holders
and shall be effective to transfer or convey all right, title and interest of
the Indenture Trustee, the Owner and such holders in and to such Collateral or
part thereof. No purchaser or other grantee shall be required to inquire as to
the authorization, necessity, expediency or regularity of such sale or
conveyance or as to the application of any sale or other proceeds with respect
thereto by the Indenture Trustee.

            SECTION 11.04. Trust Indenture for Benefit of the Owner, Indenture
Trustee, and Certificate Holders.


                                      -60-
<PAGE>

            Nothing in this Trust Indenture, whether express or implied, shall
be construed to give any person other than the Owner, the Indenture Trustee and
the Certificate Holders, any legal or equitable right, remedy or claim under or
in respect of this Trust Indenture.

            SECTION 11.05. Notices.

            Unless otherwise expressly specified or permitted by the terms
hereof, all notices, requests, demands, authorizations, directions, consents,
waivers or documents provided or permitted by this Trust Indenture to be made,
given, furnished or filed shall be in writing, personally delivered or mailed by
certified mail, postage prepaid, or by facsimile or confirmed telex, and (i) if
to the Owner, addressed to it at its office at 5101 Northwest Drive, St. Paul,
MN 55111-3034, Attention: Treasurer (Telecopy No. (612) 726-0665), (ii) if to
the Indenture Trustee, addressed to it at its office at, for U.S. mail at
Corporate Trust Department, P.O. Box 778, Boston, Massachusetts 02102-0778, and
for overnight courier at Corporate Trust Department, 2 Avenue de Lafayette,
Boston, Massachusetts 02111-1724 (Telecopy No. (617) 662-1462), (iii) if to any
Certificate Holder, addressed to such party at such address as such party shall
have furnished by notice to the Owner and the Indenture Trustee or, until an
address is so furnished, addressed to the address of such party (if any) set
forth on the signature pages to the Participation Agreement or in the Secured
Certificate Register. Any notice to the Supplier shall be addressed to its Chief
Executive Officer, 2 Rond Point Maurice Bellonte, 31700 Blagnac, France (telex
521155F) (fax: ________). Whenever any notice in writing is required to be given
by the Owner or the Indenture Trustee or any Certificate Holder to any of the
other of them, such notice shall be deemed given and such requirement satisfied
when such notice is received, or if such notice is mailed by certified mail,
postage prepaid, three Business Days after being mailed, addressed as provided
above. Any party hereto may change the address to which notices to such party
will be sent by giving notice of such change to the other parties to this Trust
Indenture.

            SECTION 11.06. Severability.

            Any provision of this Trust Indenture which is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the
remaining provisions hereof. Any such prohibition or unenforceability in any
particular jurisdiction shall not invalidate or render unenforceable such
provision in any other jurisdiction.

            SECTION 11.07. No Oral Modification or Continuing Waivers.

            No term or provision of this Trust Indenture or the Secured
Certificates may be changed, waived, discharged or terminated orally, but only
by an instrument in writing signed by the Owner and the Indenture Trustee, in
compliance with Section 10.01 hereof. Any waiver of the terms hereof or of any
Secured Certificate shall be effective only in the specific instance and for the
specific purpose given.

            SECTION 11.08. Successors and Assigns.


                                      -61-
<PAGE>

            All covenants and agreements contained herein shall be binding upon,
and inure to the benefit of, each of the parties hereto and the permitted
successors and assigns of each, all as herein provided. Any request, notice,
direction, consent, waiver or other instrument or action by any Certificate
Holder shall bind the successors and assigns of such holder. Each Certificate
Holder by its acceptance of a Secured Certificate agrees to be bound by this
Trust Indenture and all provisions of the Participation Agreement applicable to
a Loan Participant or a Certificate Holder.

            SECTION 11.09. Headings.

            The headings of the various Articles and sections herein and in the
table of contents hereto are for convenience of reference only and shall not
define or limit any of the terms or provisions hereof.

            SECTION 11.10. Normal Commercial Relations.

            Anything contained in this Trust Indenture to the contrary
notwithstanding, the Owner, the Indenture Trustee, any Certificate Holder or any
bank or other Affiliate of such Certificate Holder may conduct any banking or
other financial transactions, and have banking or other commercial
relationships, with the Owner fully to the same extent as if this Trust
Indenture were not in effect, including without limitation the making of loans
or other extensions of credit to the Owner for any purpose whatsoever, whether
related to any of the transactions contemplated hereby or otherwise.

            SECTION 11.11. Governing Law; Counterpart Form.

            THIS TRUST INDENTURE SHALL IN ALL RESPECTS BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF NEW YORK,
INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. THIS TRUST
INDENTURE IS BEING DELIVERED IN THE STATE OF NEW YORK. This Trust Indenture may
be executed by the parties hereto in separate counterparts (or upon separate
signature pages bound together into one or more counterparts), each of which
when so executed and delivered shall be an original, but all such counterparts
shall together constitute but one and the same instrument.

            SECTION 11.12. Voting By Certificate Holders.

            All votes of the Certificate Holders shall be governed by a vote of
a Majority in Interest of Certificate Holders, except as otherwise provided
herein.

            SECTION 11.13. Bankruptcy.

            It is the intention of the parties that the Indenture Trustee, shall
be entitled to the benefits of Section 1110 with respect to the right to take
possession of the Aircraft, Airframe, Engines and Parts as provided herein in
the event of a case under Chapter 11 of the Bankruptcy


                                      -62-
<PAGE>

Code in which the Owner is a debtor, and in any instance where more than one
construction is possible of the terms and conditions hereof or any other
pertinent Operative Document, each such party agrees that a construction which
would preserve such benefits shall control over any construction which would not
preserve such benefits.


                                      -63-
<PAGE>

               IN WITNESS WHEREOF, the parties hereto have caused this Trust
Indenture to be duly executed by their respective officers thereof duly
authorized as of the day and year first above written.


                                 NORTHWEST AIRLINES, INC.,

                                 By: ___________________________________________
                                     Name:
                                     Title:


                                 STATE STREET BANK AND TRUST COMPANY,
                                 not in its individual capacity,
                                 except as expressly provided herein,
                                 but solely as Indenture Trustee,
                                 Indenture Trustee

                                 By: ___________________________________________
                                     Name:
                                     Title:


                                      -64-
<PAGE>

                                                                         ANNEX A

                                         DEFINITIONS

            Unless the context otherwise requires, the following terms shall
have the following meanings for all purposes of the Trust Indenture and Security
Agreement [NW ____ _] and shall be equally applicable to both the singular and
the plural forms of the terms herein defined:

                  "Actual Knowledge" shall mean, as it applies to the Indenture
            Trustee, actual knowledge of a Responsible Officer in the Corporate
            Trust Office of the Indenture Trustee.

                  "Affiliate" means, with respect to any person, any other
            person directly or indirectly controlling, controlled by or under
            common control with such person. For the purposes of this
            definition, "control" (including "controlled by" and "under common
            control with") shall mean the power, directly or indirectly, to
            direct or cause the direction of the management and policies of such
            person whether through the ownership of voting securities or by
            contract or otherwise.

                  "Aircraft" means the Airframe (or any airframe from time to
            time substituted for such Airframe pursuant to Section 7.06 of the
            Trust Indenture) together with the initial Engines (or any engine
            substituted for either of such Engines pursuant to the terms of the
            Trust Indenture), whether or not any such initial or substituted
            Engines may from time to time be installed on such initial or
            substituted Airframe or may be installed on any other airframe or on
            any other aircraft.

                  "Airframe" means: (i) the Airbus [A320-212] [A319-113]
            aircraft (except Engines or engines from time to time installed
            thereon) identified by U.S. registration mark and manufacturer's
            serial number in the initial Trust Indenture Supplement and any
            aircraft (except Engines or engines from time to time installed
            thereon) which may from time to time be substituted for such
            aircraft (except Engines or engines from time to time installed
            thereon) pursuant to clause (ii) of the first paragraph of Section
            7.06(a) of the Trust Indenture; and (ii) any and all Parts so long
            as the same shall be incorporated or installed in or attached to
            such aircraft (except Engines or engines from time to time installed
            thereon).

                  "Amortization Amount" shall mean, with respect to any
            Principal Amount Repayment Date, the amount set forth opposite such
            Date on the Amortization Schedule.

                  "Amortization Schedule" shall mean the amortization schedule
            for the Secured Certificates delivered pursuant to Section 2.02 of
            the Trust Indenture.


                                   Annex A-1
<PAGE>

                  "Applicable Rate" means as of any date the weighted average of
            the interest rates borne by the Secured Certificates then
            outstanding and, if no Secured Certificates shall be outstanding,
            the Base Rate.

                  "Assigned Warranties" has the meaning set forth in the
            definition of "Contract Rights".

                  "Average Life Date" for each Secured Certificate to be
            redeemed shall be the date which follows the redemption date by a
            period equal to the Remaining Weighted Average Life at the
            redemption date of such Secured Certificate. "Remaining Weighted
            Average Life" of such Secured Certificate, at the redemption date of
            such Secured Certificate, shall be the number of days equal to the
            quotient obtained by dividing (a) the sum of the products obtained
            by multiplying (i) the amount of each then remaining installment of
            principal, including the payment due on the maturity date of such
            Secured Certificate, by (ii) the number of days from and including
            the redemption date to but excluding the scheduled payment date of
            such principal installment; by (b) the then unpaid principal amount
            of such Secured Certificate.

                  "Bankruptcy Code" means the Bankruptcy Reform Act of 1978, as
            amended, or any subsequent legislation that amends, supplements or
            supersedes such provisions.

                  "Base Rate" means the rate of interest announced publicly by
            Citibank, N.A. in New York, New York from time to time as its base
            rate.

                  "Business Day" means any day other than a Saturday or Sunday
            or a day on which commercial banks are required or authorized to
            close in the City of New York, New York; Boston, Massachusetts; or
            Minneapolis, Minnesota.

                  "Cash Equivalents" shall mean (i) direct obligations of the
            United States of America and agencies guaranteed by the United
            States government having a final maturity of ninety (90) days or
            less from date of purchase thereof; (ii) certificates of deposit
            issued by, bankers' acceptances of, or time deposits with, any bank,
            trust company or national banking association incorporated under the
            laws of the United States of America or one of the states thereof
            having combined capital and surplus and retained earnings as of its
            last report of condition of at least $500,000,000 and having a
            rating of Aa or better by Moody's Investors Service, Inc.
            ("Moody's") or AA or better by Standard & Poor's Ratings Services, a
            division of McGraw-Hill, Inc. ("S&P") and having a final maturity of
            ninety (90) days or less from date of purchase thereof; and (iii)
            commercial paper of any holding company of a bank, trust company or
            national banking association described in (ii) and commercial paper
            of any corporation or finance company incorporated or doing business
            under the laws of the United States of America or any state thereof
            having a rating assigned to such commercial paper of A1 by S&P


                                   Annex A-2
<PAGE>

            or P1 by Moody's and having a final maturity of ninety (90) days or
            less from the date of purchase thereof; provided, however, that the
            aggregate amount at any one time so invested in certificates of
            deposit issued by any one bank shall not be in excess of 5% of such
            bank's capital and surplus.

                  "Certificate Holder" shall mean any holder from time to time
            of one or more Secured Certificates.

                  "Certificated Air Carrier" means a Citizen of the United
            States holding a carrier operating certificate issued by the
            Secretary of Transportation pursuant to Chapter 447 of Title 49,
            United States Code, for aircraft capable of carrying ten or more
            individuals or 6,000 pounds or more of cargo or that otherwise is
            certified or registered to the extent required to fall within the
            purview of 11 U.S.C. Section 1110 or any analogous successor
            provision of the Bankruptcy Code.

                  "Citizen of the United States" has the meaning specified in
            Section 40102(a)(15) of Title 49 of the United States Code or any
            similar legislation of the United States of America enacted in
            substitution or replacement therefor.

                  "Civil Reserve Air Fleet Program" means the Civil Reserve Air
            Fleet Program currently administered by the United States Air Force
            Air Mobility Command pursuant to Executive Order No. 11490, as
            amended, or any substantially similar program.

                  "Closing" means the closing of the transactions contemplated
            by the Participation Agreement.

                  "Closing Date" means the date on which the Closing occurs.

                  "Code" means the Internal Revenue Code of 1986, as amended.

                  "Collateral" shall mean all estate, right, title and interest
            of the Indenture Trustee in and to the properties referred to in the
            Granting Clause of the Trust Indenture.

                  "Commitment" means the amount the payment of each Pass Through
            Trustee to be made as provided in Section 1 of the Participation
            Agreement.

                  "Consent and Agreement" means, collectively, the Manufacturer
            Consent and Agreement to Assignment of Warranties and the Supplier
            Consent and Agreement to Assignment of Warranties.

                  "Contract Rights" means all of the Owner's rights and
            interests in and to (i) Clauses 12, 13 and, to the extent relating
            to acts to be performed following the date of enforcement of the
            Trust Indenture, 17 of the Purchase Agreement (but not any other
            provision of the Purchase Agreement or any letter agreement referred
            to


                                   Annex A-3
<PAGE>

            therein) as such Clauses relate to the Aircraft (the "Assigned
            Warranties"), and (ii) the Guaranty as it relates to the Assigned
            Warranties, reserving to the Owner, however, all of the Owner's
            rights and interests in and to Clauses 12, 13 and, to the extent
            relating to acts to be performed following the date of enforcement
            of the Trust Indenture, 17 of the Purchase Agreement and the
            Guaranty as and to the extent that such Clauses of the Purchase
            Agreement and the Guaranty relate to aircraft other than the
            Aircraft and to the extent that the Purchase Agreement and the
            Guaranty relate to any other matters not directly pertaining to the
            Aircraft.

                  "Corporate Trust Office" shall mean the principal office of
            the Indenture Trustee located at 225 Franklin Street, Boston,
            Massachusetts 02110, Attention: Corporate Trust Department, or such
            other office at which the Indenture Trustee's corporate trust
            business shall be administered which the Indenture Trustee shall
            have specified by notice in writing to the Owner, the Loan
            Participants and each Certificate Holder.

                  "Debt" shall mean any liability for borrowed money, or any
            liability for the payment of money in connection with any letter of
            credit transaction, or other liabilities evidenced or to be
            evidenced by bonds, debentures, notes or other similar instruments
            or for the deferred purchase price of property, goods or services.

                  "Debt Rate" shall mean, with respect to any Series, the rate
            per annum specified for such Series under the heading "Interest
            Rate" in Schedule I to the Trust Indenture.

                  "Default" means any event which with the giving of notice or
            the lapse of time or both would become an Event of Default.

                  "Dollars" and "$" means the lawful currency of the United
            States of America.

                  "Engine" means (i) each of the two CFM International, Inc.
            Model CFM56-5A[3][4] engines listed by manufacturer's serial number
            in the initial Trust Indenture Supplement, whether or not from time
            to time thereafter installed on the Airframe or installed on any
            other airframe or on any other aircraft; and (ii) any engine which
            may from time to time be substituted, pursuant to the terms of the
            Trust Indenture, for any of such two engines, together in each case
            with any and all Parts incorporated or installed in or attached
            thereto.

                  "ERISA" means the Employee Retirement Income Security Act of
            1974, as amended from time to time, and the regulations promulgated
            and rulings issued thereunder. Section references to ERISA are to
            ERISA, as in effect at the date of the Participation Agreement and
            any subsequent provisions of ERISA, amendatory thereof, supplemental
            thereto or substituted therefor.


                                   Annex A-4
<PAGE>

                  "Event of Default" shall have the meaning specified in Section
            4.01 of the Trust Indenture.

                  "Event of Loss" with respect to the Aircraft, Airframe or any
            Engine means any of the following events with respect to such
            property: (i) the loss of such property or of the use thereof due to
            the destruction of or damage to such property which renders repair
            uneconomic or which renders such property permanently unfit for
            normal use by the Owner (or any Lessee) for any reason whatsoever;
            (ii) any damage to such property which results in an insurance
            settlement with respect to such property on the basis of a total
            loss, or a constructive or compromised total loss; (iii) the theft
            or disappearance of such property, or the confiscation,
            condemnation, or seizure of, or requisition of title to, or use of,
            such property (other than a requisition for use by the United States
            Government or any other government of registry of the Aircraft, or
            any agency or instrumentality of any thereof) which in the case of
            any event referred to in this clause (iii) (other than a requisition
            of title) shall have resulted in the loss of possession of such
            property by the Owner (or any Lessee) for a period in excess of 180
            consecutive days or, in the case of a requisition of title, the
            requisition of title shall not have been reversed within 90 days
            from the date of such requisition of title; (iv) as a result of any
            law, rule, regulation, order or other action by the Federal Aviation
            Administration or other governmental body of the government of
            registry of the Aircraft having jurisdiction, the use of such
            property in the normal course of the business of air transportation
            shall have been prohibited for a period of 180 consecutive days,
            unless the Owner (or any Lessee), prior to the expiration of such
            180 day period, shall have undertaken and shall be diligently
            carrying forward all steps which are necessary or desirable to
            permit the normal use of such property by the Owner (or such
            Lessee), but in any event if such use shall have been prohibited for
            a period of two consecutive years, provided that no Event of Loss
            shall be deemed to have occurred if such prohibition has been
            applicable to the entire U.S. registered fleet of Airbus Model
            [A320-200] [A319-100] aircraft of the Owner (or any Lessee) and the
            Owner (or a Lessee), prior to the expiration of such two-year
            period, shall have conformed at least one such aircraft in its fleet
            to the requirements of any such law, rule, regulation, order or
            other action and commenced regular commercial use of the same in
            such jurisdiction and shall be diligently carrying forward, in a
            manner which does not discriminate against the Aircraft in so
            conforming the Aircraft, all steps which are necessary or desirable
            to permit the normal use of the Aircraft by the Owner (or such
            Lessee), provided, further that, notwithstanding any of the
            foregoing, such prohibition shall constitute an Event of Loss if
            such use shall have been prohibited for a period of three
            consecutive years; and (v) any divestiture of title to or interest
            in an Engine treated as an Event of Loss pursuant to Section 7.06(b)
            of the Trust Indenture. An Event of Loss with respect to the
            Aircraft shall be deemed to have occurred if an Event of Loss occurs
            with respect to the Airframe.


                                   Annex A-5
<PAGE>

                  "Expenses" shall have the meaning attributed thereto in
            Section 7(c) of the Participation Agreement.

                  "Federal Aviation Act" means that portion of the United States
            Code comprising those provisions formerly referred to as the Federal
            Aviation Act of 1958, as amended, or any subsequent legislation that
            amends, supplements or supersedes such provisions.

                  "Federal Aviation Administration" and "FAA" mean the United
            States Federal Aviation Administration and any agency or
            instrumentality of the United States government succeeding to their
            functions.

                  "Foreign Air Carrier" means any air carrier which is not a
            U.S. Air Carrier and which performs maintenance, preventative
            maintenance and inspections for the Aircraft, Airframe and/or any
            Engine or engine to standards which are approved by, or which are
            substantially equivalent to those required by, the Federal Aviation
            Administration, the Civil Aviation Authority of the United Kingdom,
            the Direction Generale de l'Aviation Civile of the French Republic,
            the Luftfahrt Bundesamt of the Federal Republic of Germany, the
            Rijksluchtvaartdienst of the Kingdom of the Netherlands, the
            Ministry of Transportation of Japan or the Federal Ministry of
            Transport of Canada (and any agency or instrumentality of the
            applicable government succeeding to the functions of any of the
            foregoing entities).

                  "French Pledge Agreement" means the French Pledge Agreement,
            dated as of [_____________], between the Owner and the Indenture
            Trustee.

                  "Government Entity" mean (a) any federal, state, provincial or
            similar government, and any body, board, department, commission,
            court, tribunal, authority, agency or other instrumentality of any
            such government or otherwise exercising any executive, legislative,
            judicial, administrative or regulatory functions of such government
            or (b) any other government entity having jurisdiction over any
            matter contemplated by the Operative Agreements or relating to the
            observance or performance of the obligations of any of the parties
            to the Operative Agreements.

                  "Guarantee" means that certain Guarantee [NW ____ _], dated as
            of [________], made by the Guarantor, as such Guarantee may be
            amended or supplemented from time to time pursuant to the applicable
            provisions thereof.

                  "Guarantor" means Northwest Airlines Corporation, a Delaware
            corporation.

                  "Guaranty" means that certain Guaranty of the Manufacturer
            attached to the Purchase Agreement.


                                   Annex A-6
<PAGE>

                  "Indemnitee" means (i) the Indenture Trustee, (ii) the Loan
            Participants and each other Certificate Holder, (iii) the
            Subordination Agent, (iv) the Liquidity Provider, (v) the Pass
            Through Trustees, (vi) each Affiliate of the Person described in
            clause (i), (vii) each Affiliate of the Persons described in clauses
            (iii), (iv) and (v) inclusive, (viii) the respective directors,
            officers, employees, agents and servants of each of the Persons
            described in clauses (i) through (v), inclusive, (ix) the successors
            and permitted assigns of the Person described in clause (i), and (x)
            the successors and permitted assigns of the Persons described in
            clauses (ii), (iii), (iv) and (v) inclusive.

                  "Indenture Agreements" means the Participation Agreement, the
            Purchase Agreement, the Guarantee, the Guaranty, and any other
            contract, agreement or instrument from time to time assigned or
            pledged under the Trust Indenture.

                  "Indenture Trustee" means the Indenture Trustee under the
            Trust Indenture, and any entity which may from time to time be
            acting as indenture trustee under the Trust Indenture.

                  "Indenture Trustee Documents" means the Participation
            Agreement and the Trust Indenture.

                  "Indenture Trustee's Liens" means any Lien which arises as a
            result of (A) claims against the Indenture Trustee not related to
            its interest in the Aircraft, (B) acts of the Indenture Trustee not
            permitted by, or failure of the Indenture Trustee to take any action
            required by, the Operative Documents to the extent such acts arise
            or such failure arises from or constitutes gross negligence or
            willful misconduct, (C) claims against the Indenture Trustee
            relating to Taxes or Expenses which are excluded from the
            indemnification provided by Section 7 of the Participation Agreement
            pursuant to said Section 7, or (D) claims against the Indenture
            Trustee arising out of the transfer by the Indenture Trustee of all
            or any portion of its interest in the Aircraft, the Collateral or
            the Operative Documents other than a transfer of the Aircraft
            pursuant to Article IV of the Trust Indenture while an event of
            default is continuing and prior to the time that the Indenture
            Trustee has received all amounts due pursuant to the Trust
            Indenture.

                  "Intercreditor Agreement" means that certain Intercreditor
            Agreement among the Pass Through Trustees, the Liquidity Provider
            and the Subordination Agent, as such Intercreditor Agreement may be
            amended or supplemented from time to time pursuant to the applicable
            provisions thereof.

                  "Issuance Date" means June 25, 1999.

                  "Law" shall mean (a) any constitution, treaty, statute, law,
            regulation, order, rule or directive of any Government Entity, and
            (b) any judicial or administrative interpretation or application of,
            or decision under, any of the


                                   Annex A-7
<PAGE>

            foregoing.

                  "Lease" means any lease permitted by the terms of Section 7.02
            of the Trust Indenture.

                  "Lessee" means any Person for so long, but only so long, as
            such Person is in possession of the Airframe and/or any Engine
            pursuant to the terms of a Lease which is then in effect pursuant to
            Section 7.02(b)(x) of the Trust Indenture.

                  "Lien" means any mortgage, pledge, lien, charge, claim,
            encumbrance, lease, sublease or security interest.

                  "Liquidity Facilities" means the three Revolving Credit
            Agreements between the Subordination Agent, as borrower, and the
            Liquidity Provider, and any replacement thereof, in each case as the
            same may be amended, modified or supplemented.

                  "Liquidity Provider" means Citibank, N.A., as Class A
            Liquidity Provider, Class B Liquidity Provider and Class C Liquidity
            Provider under the Liquidity Facilities, or any successor thereto.

                  "Loan Participant" means each Purchaser and its respective
            successors and registered assigns, including any Certificate Holder.

                  "Loan Participant Liens" means any Lien which arises from acts
            or claims against any Loan Participant not related to the
            transactions contemplated by the Operative Documents.

                  "Majority in Interest of Certificate Holders" as of a
            particular date of determination shall mean the holders of more than
            a majority in aggregate unpaid Principal Amount of all Secured
            Certificates outstanding as of such date (excluding any Secured
            Certificates held by the Owner or its affiliates (unless all Secured
            Certificates then outstanding shall be held by the Owner or its
            affiliates)).

                  "Make-Whole Amount" means, with respect to any Secured
            Certificate, the amount (as determined by an independent investment
            banker selected by the Owner and reasonably acceptable to the
            Indenture Trustee) by which (a) the present value of the remaining
            scheduled payments of principal and interest from the redemption
            date to maturity of such Secured Certificate computed by discounting
            each such payment on a semiannual basis from its respective Payment
            Date (assuming a 360-day year of twelve 30-day months) using a
            discount rate equal to the Treasury Yield exceeds (b) the
            outstanding principal amount of such Secured Certificate plus
            accrued interest. For purposes of determining the Make-Whole Amount,
            "Treasury Yield" at the time of determination with respect to any
            Secured Certificate means the interest rate (expressed as a
            semiannual equivalent and as a decimal and, in the case of United
            States Treasury bills,


                                   Annex A-8
<PAGE>

            converted to a bond equivalent yield) determined to be the per annum
            rate equal to the semiannual yield to maturity for United States
            Treasury securities maturing on the Average Life Date of such
            Secured Certificate and trading in the public securities market
            either as determined by interpolation between the most recent weekly
            average yield to maturity for two series of United States Treasury
            securities, trading in the public securities markets, (A) one
            maturing as close as possible to, but earlier than, the Average Life
            Date of such Secured Certificate and (B) the other maturing as close
            as possible to, but later than, the Average Life Date of such
            Secured Certificate, in each case as published in the most recent
            H.15(519) or, if a weekly average yield to maturity for United
            States Treasury securities maturing on the Average Life Date of such
            Secured Certificate is reported on the most recent H.15(519), such
            weekly average yield to maturity as published in such H.15(519).
            "H.15(519)" means the weekly statistical release designated as such,
            or any successor publication, published by the Board of Governors of
            the Federal Reserve System. The date of determination of a
            Make-Whole Amount shall be the third Business Day prior to the
            applicable redemption date and the "most recent H.15(519)" means the
            H.15(519) published prior to the close of business on the third
            Business Day prior to the applicable redemption date.

                  "Manufacturer" means Airbus Industrie, G.I.E., a Groupment
            d'Interet Economique established under Ordonnance 67-821, dated
            September 23, 1967, of the Republic of France.

                  "Manufacturer Consent and Agreement to Assignment of
            Warranties" means the Manufacturer Consent and Agreement to
            Assignment of Warranties [NW ____ __], dated as of the date hereof,
            executed by the Manufacturer, as the same may be amended, modified
            or supplemented from time to time in accordance with the applicable
            provisions thereof.

                  "Manufacturer Documents" means the Manufacturer Consent and
            Agreement to Assignment of Warranties and the Guaranty.

                  ["Mortgage" means that certain Mortgage and Security
            Agreement, dated as of [________________].]

                  "Mortgaged Property" shall have the meaning specified in
            Section 3.03 of the Trust Indenture.

                  "Note Purchase Agreement" means that certain Note Purchase
            Agreement, dated as of the Issuance Date, among Northwest Airlines,
            Inc., the Subordination Agent, First Security Bank, National
            Association, as Escrow Agent, State Street Bank and Trust Company of
            Connecticut, National Association, as Paying Agent and the Pass
            Through Trustee under each Pass Through Trust Agreement providing
            for, among other things, the issuance and sale of certain secured
            certificates.


                                   Annex A-9
<PAGE>

                  "Operative Documents" and "Operative Document" means each of
            the Participation Agreement, the Trust Indenture, the Trust
            Indenture Supplement covering the Aircraft, the Secured
            Certificates, the Purchase Agreement (insofar as it relates to the
            Aircraft), the Consent and Agreement and the Guarantee.

                  "Overall Transaction" means all the transactions contemplated
            by the Operative Documents.

                  "Owner Documents" means the Participation Agreement, the Trust
            Indenture and the Purchase Agreement (insofar as it relates to the
            Aircraft).

                  "Participants" means and includes the Loan Participants.

                  "Participation Agreement" means that certain Participation
            Agreement [NW ____ _], dated as of [_______________], among the
            Owner, the Subordination Agent, the Indenture Trustee, the
            Guarantor, and the Purchasers as the same may from time to time be
            supplemented or further amended, or the terms thereof waived or
            modified, to the extent permitted by, and in accordance with, the
            terms thereof.

                  "Parties" means the Indenture Trustee and the Participants.

                  "Parts" means all appliances, parts, instruments,
            appurtenances, accessories, furnishings and other equipment of
            whatever nature (other than (a) complete Engines or engines, (b) any
            items leased by the Owner from a third party (other than Lessor) and
            (c) cargo containers) which may from time to time be incorporated or
            installed in or attached to the Airframe or any Engine.

                  "Pass Through Certificates" means the pass through
            certificates to be issued by the Pass Through Trustee in connection
            with the Overall Transaction.

                  "Pass Through Trust" means each of the three separate pass
            through trusts created under the Pass Through Trust Agreements.

                  "Pass Through Trust Agreement" means the pass through trust
            agreement and each of the three separate pass through trust
            supplements referred to on Schedule III to the Participation
            Agreement.

                  "Pass Through Trustee" means State Street Bank and Trust
            Company of Connecticut, National Association, a national banking
            association, in its capacity as trustee under each Pass Through
            Trust Agreement, and each other person that may from time to time be
            acting as successor trustee under any such Pass Through Trust
            Agreement.

                  "Past Due Rate" shall mean, with respect to the Secured
            Certificates, the rate per annum equal to 2% over the Debt Rate as
            in effect from time to time.


                                   Annex A-10
<PAGE>

                  "Payment Date" shall mean each [March 1 and September 1],
            commencing on [March/September _, ____] (or, if any such day is not
            a Business Day, the immediately succeeding Business Day) until the
            Secured Certificates have been paid in full.

                  "Permitted Lien" means any Lien referred to in clauses (i)
            through (viii) of Section 7.01 of the Trust Indenture.

                  "Permitted Lessee" means any entity domiciled in a country
            listed in Schedule III to the Trust Indenture.

                  "Person" means any individual, corporation, partnership,
            limited liability company, joint venture, association, joint-stock
            company, trust, unincorporated organization or government or any
            agency or political subdivision thereof.

                  "Principal Amount" with respect to a Secured Certificate means
            the stated original principal amount of such Secured Certificate
            and, with respect to all Secured Certificates, means the aggregate
            stated original principal amounts of all Secured Certificates.

                  "Principal Amount Repayment Date" shall mean each Payment Date
            on which any portion of the Principal Amount is due and payable in
            accordance with the Amortization Schedule.

                  "Purchase Agreement" means that certain [Airbus A320 Purchase
            Agreement, dated as of March 26, 1996] [Airbus A319 Purchase
            Agreement, dated as of September 19, 1997], between the Supplier and
            the Owner relating to the purchase by the Owner of the Aircraft, as
            originally executed or as modified, amended or supplemented in
            accordance with the terms thereof, but only insofar as the foregoing
            relates to the Aircraft.

                  "Purchasers" means the Pass Through Trustees under each Pass
            Through Trust Agreement.

                  "QIB" shall have the meaning specified in Section 2.08 of the
            Trust Indenture.

                  "Related Indemnitee Group" means, with respect to any
            Indemnitee, any officer, director, servant, employee, agent or
            Affiliate thereof.

                  "Replacement Airframe" shall mean any airframe substituted for
            the Airframe pursuant to Section 7.06 of the Trust Indenture.

                  "Replacement Engine" shall mean any engine substituted for an
            Engine pursuant to Section 7.06 of the Trust Indenture.


                                   Annex A-11
<PAGE>

                  "Responsible Officer" means a responsible officer in the
            Corporate Trust Office of the Indenture Trustee.

                  "Secured Certificates" shall mean and include any Secured
            Certificates issued hereunder, and issued in exchange therefor or
            replacement thereof.

                  "Secured Obligations" shall have the meaning specified in
            Section 2.06 of the Trust Indenture.

                  "Securities Act" shall mean the Securities Act of 1933, as
            amended.

                  "Senior Holder" shall have the meaning specified in Section
            2.15(c) of the Trust Indenture.

                  "Series A" or "Series A Secured Certificates" means Secured
            Certificates issued and designated as "Series A" hereunder, in the
            Principal Amount and maturities and bearing interest as specified in
            Schedule I to the Trust Indenture under the heading "Series A."

                  "Series B" or "Series B Secured Certificates" means Secured
            Certificates issued and designated as "Series B" hereunder, in the
            Principal Amount and maturities and bearing interest as specified in
            Schedule I to the Trust Indenture under the heading "Series B."

                  "Series C" or "Series C Secured Certificates" means Secured
            Certificates issued and designated as "Series C" hereunder, in the
            Principal Amount and maturities and bearing interest as specified in
            Schedule I to the Trust Indenture under the heading "Series C."

                  "State Street" means State Street Bank and Trust Company, a
            Massachusetts trust company, not in its capacity as Indenture
            Trustee under the Trust Indenture, but in its individual capacity.

                  "Subordination Agent" means State Street Bank and Trust
            Company, a Massachusetts trust company, as subordination agent under
            the Intercreditor Agreement, or any successor thereto.

                  "Supplier" means AVSA, S.A.R.L., a French societe a
            responsabilite limitee, organized and existing under the laws of the
            French Republic, and its successors.

                  "Supplier Consent and Agreement to Assignment of Warranties"
            means the Supplier Consent and Agreement to Assignment of Warranties
            [NW ____ _], dated as of the date hereof, executed by the Supplier,
            as the same may be amended, modified or supplemented from time to
            time in accordance with the applicable terms thereof.


                                   Annex A-12
<PAGE>

                  "Supplier Documents" means the Purchase Agreement and the
            Supplier Consent and Agreement to Assignment of Warranties.

                  "Tax Indemnitee" means (i) the Indenture Trustee, its
            successors and permitted assigns and (ii) the Trust Indenture
            Estate.

                  "Taxes" means any and all fees (including, without limitation,
            license, recording, documentation and registration fees), taxes
            (including, without limitation, income, gross receipts, sales,
            rental, use, turnover, value added, property (tangible and
            intangible), excise and stamp taxes), license, levies, imposts,
            duties, charges, assessments or withholdings of any nature
            whatsoever, together with any and all penalties, fines, additions to
            tax and interest thereon (each, individually a "Tax").

                  "Transactions" means the transactions contemplated by the
            Participation Agreement and the other Operative Documents.

                  "Trust Indenture", "this Indenture"," the Trust Indenture",
            "Indenture", and "the Indenture" shall mean the Trust Indenture and
            Security Agreement [NW ____ _], dated as of [______] between the
            Owner and the Indenture Trustee, as it may from time to time be
            supplemented or amended as herein provided, including supplementing
            by a Trust Indenture Supplement pursuant thereto.

                  "Trust Indenture Estate" shall mean all estate, right, title
            and interest of the Indenture Trustee in and to the properties
            referred to in the Granting Clause of the Trust Indenture.

                  "Trust Indenture Supplement" shall mean a supplement to the
            Trust Indenture, in substantially the form of Exhibit A thereto,
            which shall particularly describe the Aircraft, and any Replacement
            Airframe and Replacement Engine.

                  "Underwriting Agreement" means that certain Underwriting
            Agreement, dated as of June 18, 1999, among the Owner, the
            Guarantor, and the underwriters named therein.

                  "U.S. Air Carrier" means any Certificated Air Carrier as to
            which there is in force an air carrier operating certificate issued
            pursuant to Part 121 of the regulations under the Federal Aviation
            Act, or which may operate as an air carrier by certification or
            otherwise under any successor or substitute provisions therefor or
            in the absence thereof.

                  "Wet Lease" means any arrangement whereby the Owner (or any
            Lessee) agrees to furnish the Airframe and Engines or engines
            installed thereon to a third party pursuant to which such Airframe
            and Engines or engines (i) shall be operated solely by regular
            employees of the Owner (or any Lessee) possessing all


                                   Annex A-13
<PAGE>

            current certificates and licenses that would be required under the
            Federal Aviation Act or, if the Aircraft is not registered in the
            United States, all certificates and licenses required by the laws of
            the jurisdiction of registry, for the performance by such employees
            of similar functions within the United States of America or such
            other jurisdiction of registry (it is understood that cabin
            attendants need not be regular employees of the Owner (or any
            Lessee)) and (ii) shall be maintained by the Owner (or any Lessee)
            in accordance with its normal maintenance practices.


                                   Annex A-14
<PAGE>

                                                      --------------------------
                                                               EXHIBIT A
                                                                    TO
                                                            TRUST INDENTURE
                                                        AND SECURITY AGREEMENT
                                                      --------------------------

                           TRUST INDENTURE SUPPLEMENT
                                   [NW ____ _]

            This TRUST INDENTURE SUPPLEMENT [NW ____ _], dated [_____________]
(herein called this "Trust Indenture Supplement") of NORTHWEST AIRLINES, INC.
(the "Owner").

                              W I T N E S S E T H:

            WHEREAS, the TRUST INDENTURE AND SECURITY AGREEMENT [NW ____ _],
dated as of [_______________] (as amended and supplemented to the date hereof,
the "Trust Indenture") between the Owner and STATE STREET BANK AND TRUST
COMPANY, as Indenture Trustee (the "Indenture Trustee"), provides for the
execution and delivery of a supplement thereto substantially in the form hereof,
which shall particularly describe the Aircraft, and shall specifically mortgage
such Aircraft to the Indenture Trustee; and

            WHEREAS, the Trust Indenture relates to the Airframe and Engines
described below, and a counterpart of the Trust Indenture is attached hereto and
made a part hereof and this Trust Indenture Supplement, together with such
counterpart of the Trust Indenture, is being filed for recordation on the date
hereof with the FAA as one document;

            NOW, THEREFORE, this Trust Indenture Supplement witnesseth that the
Owner hereby confirms that the Lien of the Trust Indenture on the Collateral
covers all of the Owner's right, title and interest in and to the following
described property:

                                    AIRFRAME

            One airframe identified as follows:



                                                  FAA
                                             Registration       Manufacturer's
     Manufacturer             Model             Number          Serial Number


together with all of the Owner's right, title and interest in and to all Parts
of whatever nature, whether now owned or hereinafter acquired and which are from
time to time incorporated or installed in or attached to said airframe.

                                AIRCRAFT ENGINES

            Two aircraft engines, each such engine having 750 or more rated
take-off


                                  EXHIBIT A-1
<PAGE>

horsepower or the equivalent thereof, identified as follows:

     Manufacturer            Manufacturer's Model             Serial Number


together with all of the Owner's right, title and interest in and to all Parts
of whatever nature, whether now owned or hereafter acquired and which are from
time to time incorporated or installed in or attached to any of such engines.

            Together with all of the Owner's right, title and interest in and to
all Parts of whatever nature, which from time to time are included within the
definition of "Airframe" or "Engine", whether now owned or hereafter acquired,
including all substitutions, renewals and replacements of and additions,
improvements, accessions and accumulations to the Airframe and Engines (other
than additions, improvements, accessions and accumulations which constitute
appliances, parts, instruments, appurtenances, accessories, furnishings or other
equipment excluded from the definition of Parts).

            TO HAVE AND TO HOLD all and singular the aforesaid property unto the
Indenture Trustee, its successors and assigns, in trust for the equal and
proportionate benefit and security of the Certificate Holders, except as
provided in Section 2.15 and Article III of the Trust Indenture without any
preference, distinction or priority of any one Secured Certificate over any
other by reason of priority of time of issue, sale, negotiation, date of
maturity thereof or otherwise for any reason whatsoever, and for the uses and
purposes and subject to the terms and provisions set forth in the Trust
Indenture.

            This Trust Indenture Supplement shall be construed as supplemental
to the Trust Indenture and shall form a part thereof. The Trust Indenture is
each hereby incorporated by reference herein and is hereby ratified, approved
and confirmed.

            This Trust Indenture Supplement is being delivered in the State of
New York.

            AND, FURTHER, the Owner hereby acknowledges that the Aircraft
referred to in this Trust Indenture Supplement has been delivered to the Owner
and is included in the property of the Owner subject to the pledge and mortgage
thereof under the Trust Indenture.


                                  EXHIBIT A-2
<PAGE>

               IN WITNESS WHEREOF, the Owner has caused this Trust Indenture
Supplement to be duly executed by one of its officers, thereunto duly
authorized, on the day and year first above written.


                                     NORTHWEST AIRLINES, INC.


                                     By: _______________________________________
                                         Name:
                                         Title:


                                  EXHIBIT A-3
<PAGE>

                                   SCHEDULE I


                             Principal Amount                   Interest Rate
Series A . . . . . .            $[_________]                        7.575%
Series B . . . . . .            $[_________]                        7.950%
Series C . . . . . .            $[_________]                        8.304%


                                   SCHEDULE I-1
<PAGE>

                        Secured Certificates Amortization

                                    SERIES A

                               Aircraft: N[_____]

                                          Percentage of Principal
               Payment Date                  Amount to be Paid



                                  SCHEDULE I-2
<PAGE>

                                    SERIES B

                               Aircraft: N[_____]

                                          Percentage of Principal
               Payment Date                  Amount to be Paid


                                  SCHEDULE I-3
<PAGE>

                                    SERIES C

                               Aircraft: N[_____]

                                          Percentage of Principal
               Payment Date                  Amount to be Paid


                                  SCHEDULE I-4
<PAGE>

                                   SCHEDULE II

                          PASS THROUGH TRUST AGREEMENTS

1.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2A, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

2.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2B, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.

3.    Pass Through Trust Agreement, dated as of June 3, 1999, among Northwest
      Airlines Corporation, Northwest Airlines, Inc., and State Street Bank and
      Trust Company of Connecticut, National Association, as supplemented by
      Trust Supplement No. 1999-2C, dated as of June 25, 1999 among Northwest
      Airlines, Inc., Northwest Airlines Corporation and State Street Bank and
      Trust Company of Connecticut, National Association.


                                  SCHEDULE II-1
<PAGE>

                                  SCHEDULE III

                   SCHEDULE OF DOMICILES OF PERMITTED LESSEES

Argentina
Australia
Austria
Bahamas
Belgium
Brazil
Canada
Chile
Denmark
Egypt
Finland
France
Germany
Greece
Hungary
Iceland
India
Indonesia
Ireland
Italy
Japan
Luxembourg
Malaysia
Malta
Mexico
Morocco
Netherlands
New Zealand
Norway
Paraguay
People's Republic of China
Philippines
Portugal
Republic of China (Taiwan)(1)
Singapore
South Africa
South Korea
Spain
Sweden
Switzerland
Thailand
Trinidad and Tobago
United Kingdom
Uruguay
Venezuela


- ----------
1     So long as on the date of entering into the proposed lease such country
      and the United States have diplomatic relations at least as good as those
      in effect on the Closing Date.


                                  SCHEDULE III-1



==============================================================================

                                    GUARANTEE
                                   [NW ____ _]

                          Dated as of [______________]

                                      from

                         NORTHWEST AIRLINES CORPORATION

                    One Airbus [A320-212] [A319-113] Aircraft

==============================================================================
<PAGE>

                         TABLE OF CONTENTS TO GUARANTEE

                                                                            Page
                                                                            ----

1.   Guarantee...............................................................1

2.   No Implied Third Party Beneficiaries....................................3

3.   Waiver; No Set-off; Reinstatement; Subrogation..........................3

4.   Amendments, Etc.........................................................4

5.   Payments................................................................4

6.   Jurisdictional Matters..................................................4

7.   Integration; Counterparts; Successors and Assigns; Headings.............4

8.   Notices.................................................................5

9.   No Waivers..............................................................5

10.  Survival................................................................5

11.  Severability............................................................5

12.  GOVERNING LAW...........................................................5

13.  Enforcement Expenses....................................................6

14.  Termination.............................................................6


                                      -i-
<PAGE>

                                    GUARANTEE
                                   [NW ____ _]

            This GUARANTEE [NW ____ _], dated as of [______________] (as
amended, modified or supplemented from time to time, this "Guarantee"), from
NORTHWEST AIRLINES CORPORATION, a Delaware corporation (together with its
permitted successors and assigns, the "Guarantor"), to the parties listed in
Schedule I hereto (collectively, together with their successors and permitted
assigns (including any subsequent Certificate Holder), the "Parties", and,
individually, a "Party").

            WHEREAS, Northwest Airlines, Inc., a Minnesota corporation (the
"Owner"), an indirect wholly-owned subsidiary of the Guarantor, wishes to enter
into a Trust Indenture and Security Agreement [NW ____ _], dated as of the date
hereof (as amended, modified or supplemented from time to time, the "Trust
Indenture"), between the Owner and State Street Bank and Trust Company, not in
its individual capacity, except as expressly stated therein, but solely as
Indenture Trustee, initially relating to one (1) Airbus [A320-212] [A319-113]
aircraft, together with two (2) CFM International, Inc. Model CFM56-5A[3][4]
engines (such aircraft and engines, and any substitute Airframe and Engines
under the Trust Indenture, being collectively referred to herein as the
"Aircraft"), pursuant to a Participation Agreement [NW ____ _], dated as of the
date hereof (as amended, modified or supplemented from time to time, the
"Participation Agreement"), among the Owner, the Parties and certain other
entities; and

            WHEREAS, it is a condition precedent to the obligations of the
Parties to consummate the transactions contemplated by the Participation
Agreement that the Guarantor execute and deliver this Guarantee; and

            WHEREAS, the capitalized terms used herein that are not defined
herein are used herein as defined in Annex A to the Trust Indenture;

            NOW, THEREFORE, in order to induce the Parties to enter into the
Participation Agreement and for other good and valuable consideration, receipt
of which is hereby acknowledged, the parties hereto agree as follows:

            1. Guarantee.

            (a) The Guarantor does hereby acknowledge that it is fully aware of
the terms and conditions of the Trust Indenture, the Participation Agreement,
the Secured Certificates and the other Operative Documents and the transactions
and the other documents contemplated thereby, and does hereby irrevocably and
fully and unconditionally guarantee, as primary obligor and not as surety
merely, to the Parties, as their respective interests may appear, the payment by
the Owner of all payment obligations when due under the Trust Indenture, the
Participation Agreement, the Secured Certificates and the other Operative
Documents to which the Owner is a party (such obligations of the Owner
guaranteed hereby being hereafter referred to, individually, as a "Financial
Obligation" and, collectively, as the "Financial Obligations") in accordance
with the terms of the Operative Documents, and the timely performance of all
other obligations of the Owner thereunder (individually, a "Nonfinancial
Obligation" and, collectively, the "Nonfinancial Obligations" or, collectively
with the Financial Obligations, the "Obligations").
<PAGE>

The Guarantor does hereby agree that in the event that the Owner fails to pay
any Financial Obligation when due for any reason (including, without limitation,
the liquidation, dissolution, receivership, insolvency, bankruptcy, assignment
for the benefit of creditors, reorganization, arrangement, composition or
readjustment of, or other similar proceedings affecting the status, existence,
assets or obligations of, the Owner, or the disaffirmance with respect to the
Owner of the Trust Indenture or any other Operative Document to which the Owner
is a party in any such proceeding) within five days after the date on which such
Financial Obligation became due and payable and the applicable grace period has
expired, the Guarantor shall pay or cause to be paid forthwith, upon the receipt
of notice from the Indenture Trustee (such notice to be sent to the Owner (to
the extent the Indenture Trustee is not stayed or prevented from doing so by
operation of law) and the Guarantor) stating that such Financial Obligation was
not paid when due and for five days after the applicable grace period has
expired, the amount of such Financial Obligation. The Guarantor hereby agrees
that in the event the Owner fails to perform any Nonfinancial Obligation for any
reason (including, without limitation, the liquidation, dissolution,
receivership, insolvency, bankruptcy, assignment for the benefit of creditors,
reorganization, arrangement, composition or readjustment of, or other similar
proceedings affecting the status, existence, assets or obligations of, the
Owner, or the disaffirmance with respect to the Owner of the Trust Indenture or
any other Operative Document to which the Owner is a party in any such
proceeding) within 10 Business Days after the date on which such Nonfinancial
Obligation is required to be performed (for avoidance of doubt, to include any
applicable grace period), the Guarantor shall cause such Nonfinancial Obligation
to be performed within 10 Business Days following the receipt of notice from the
Indenture Trustee (such notice to be sent to the Owner (to the extent the
Indenture Trustee is not stayed or prevented from doing so by operation of law)
and the Guarantor) stating that such Nonfinancial Obligation was not performed
when so required and that any applicable grace period has expired.

            (b) The obligations of the Guarantor hereunder shall not be, to the
fullest extent permitted by law, affected by: the genuineness, validity,
regularity or enforceability (or lack thereof) of any of the Owner's obligations
under the Trust Indenture or any other Operative Document to which the Owner is
a party, any amendment, waiver or other modification of the Trust Indenture or
such other Operative Document (except that any such amendment or other
modification shall be given effect in determining the obligations of the
Guarantor hereunder), or by any substitution, release or exchange of collateral
for or other guaranty of any of the Obligations (except to the extent that such
substitution, release or exchange is undertaken in accordance with the terms of
the Operative Documents) without the consent of the Guarantor, or by any
priority or preference to which any other obligations of the Owner may be
entitled over the Owner's obligations under the Trust Indenture and the other
Operative Documents to which the Owner is a party, or by any other circumstance
that might otherwise constitute a legal or equitable defense to or discharge of
the obligations of a surety or guarantor including, without limitation, any
defense arising out of any laws of the United States of America or any State
thereof which would excuse, discharge, exempt, modify or delay the due or
punctual payment and performance of the obligations of the Guarantor hereunder.
Without limiting the generality of the foregoing, it is agreed that the
occurrence of any one or more of the following shall not, to the fullest extent
permitted by law, affect the liability of the Guarantor hereunder: (a) the
extension of the time for or waiver of, at any time or from time to time,
without notice to the Guarantor, the Owner's performance of or compliance with
any of its obligations under the Operative Documents (except that such extension
or waiver shall be given effect in determining


                                      -2-
<PAGE>

the obligations of the Guarantor hereunder), (b) any assignment, transfer, lease
or other arrangement by which the Owner transfers possession or loses control of
the use of the Aircraft, (c) any defect in the title, condition, design,
operation or fitness for use of, or damage to or loss or destruction of, the
Aircraft, whether or not due to the fault of the Owner, (d) any merger or
consolidation of the Owner or the Guarantor into or with any other Person, or
any sale, transfer, lease or disposal of any of its assets or (e) any change in
the ownership of any shares of capital stock of the Owner.

            (c) This Guarantee is an absolute, present and continuing guaranty
of payment and performance and not of collectability and is in no way
conditional or contingent upon any attempt to collect from the Owner any unpaid
amounts due or otherwise to enforce performance by the Owner. The Guarantor
specifically agrees, to the fullest extent permitted by law, that it shall not
be necessary or required, and that the Guarantor shall not be entitled to
require, that any Party (i) file suit or proceed to obtain or assert a claim for
personal judgment against the Owner for the Obligations, or (ii) make any effort
at collection of the Obligations from the Owner, or (iii) foreclose against or
seek to realize upon any security now or hereafter existing for the Obligations,
including the Collateral, or (iv) file suit or proceed to obtain or assert a
claim for personal judgment against any other Person liable for the Obligations,
or make any effort at collection of the Obligations from any such other Person,
or exercise or assert any other right or remedy to which any Party is or may be
entitled in connection with the Obligations or any security or other guaranty
therefor, or (v) assert or file any claim against the assets of the Owner or any
other guarantor or other Person liable for the Obligations, or any part thereof,
before or as a condition of enforcing the liability of the Guarantor under this
Guarantee or requiring payment of said Obligations by the Guarantor hereunder,
or at any time thereafter.

            (d) The Guarantor agrees, to the fullest extent permitted by law,
that, without limiting the generality of this Guarantee, if an Event of Default
shall have occurred and be continuing and the Indenture Trustee shall be
prevented by applicable law from exercising its remedies (or any of them) under
Article IV of the Trust Indenture, the Indenture Trustee shall be, nevertheless,
entitled to receive hereunder from the Guarantor, upon demand therefor the sums
that would otherwise have been due from the Owner under the Trust Indenture had
such remedies been able to be exercised. The Guarantor hereby unconditionally
waives, to the fullest extent permitted by law, any requirement that, as a
condition precedent to the enforcement of the obligations of the Guarantor
hereunder, the Owner or all or any one or more of any other guarantors of any of
the Obligations be joined as parties to any proceedings for the enforcement of
any provision of this Guarantee.

            2. No Implied Third Party Beneficiaries. This Guarantee shall not be
deemed to create any right in any Person except a Party and shall not be
construed in any respect to be a contract in whole or in part for the benefit of
any other Person.

            3. Waiver; No Set-off; Reinstatement; Subrogation. The Guarantor
waives notice of the acceptance of this Guarantee and of the performance or
nonperformance by the Owner, demand for payment from the Owner or any other
Person, notice of nonpayment or failure to perform on the part of the Owner,
diligence, presentment, protest, dishonor and, to the fullest extent permitted
by law, all other demands or notices whatsoever, other than the request for
payment hereunder and notice provided for in Section 1 hereof. The obligations
of the


                                      -3-
<PAGE>

Guarantor shall be absolute and unconditional and shall remain in full
force and effect until satisfaction of all Obligations hereunder and, without
limiting the generality of the foregoing, to the extent not prohibited by
applicable law, shall not be released, discharged or otherwise affected by the
existence of any claims, set-off, defense or other rights that the Guarantor may
have at any time and from time to time against any Party, whether in connection
herewith or any unrelated transactions. This Guarantee shall continue to be
effective or be reinstated, as the case may be, if at any time any payment of
any Financial Obligation is rescinded or must otherwise be returned by any Party
upon the insolvency, bankruptcy, reorganization, arrangement, readjustment of
debt, dissolution, liquidation or similar proceeding with respect to the Owner
or otherwise, all as though such payment had not been made. The Guarantor, by
virtue of any payment or performance hereunder to a Party, shall be subrogated
to such Party's claim against the Owner or any other Person relating thereto;
provided, however, that the Guarantor shall not be entitled to receive payment
from the Owner in respect of any claim against the Owner arising from a payment
by the Guarantor in the event of any insolvency, bankruptcy, liquidation,
reorganization or other similar proceedings relating to the Owner, or in the
event of any proceedings for voluntary liquidation, dissolution or other
winding-up of the Owner, whether or not involving insolvency or bankruptcy
proceedings, in which case the Obligations shall be paid and performed in full
before any payment in respect of a claim by the Guarantor shall be made by or on
behalf of the Owner.

            4. Amendments, Etc. No amendment of or supplement to this Guarantee,
or waiver or modification of, or consent under, the terms hereof, shall be
effective unless evidenced by an instrument in writing signed by the Guarantor
and each Party against whom such amendment, supplement, waiver, modification or
consent is to be enforced.

            5. Payments. All payments by the Guarantor hereunder in respect of
any Obligation shall be made in Dollars and otherwise as provided in the Trust
Indenture, the Participation Agreement or any other Operative Document in which
such Obligation is contained.

            6. Jurisdictional Matters. The Guarantor (a) hereby irrevocably
submits itself to the non-exclusive jurisdiction of the United States District
Court for the Southern District of New York and to the non-exclusive
jurisdiction of the Supreme Court of the State of New York, New York County, for
the purposes of any suit, action or other proceeding arising out of this
Guarantee brought by any party, and (b) hereby waives, and agrees not to assert,
by way of motion, as a defense, or otherwise, in any such suit, action or
proceeding, to the extent permitted by applicable law, that the suit, action or
proceeding is brought in an inconvenient forum, that the venue of the suit,
action or proceeding is improper, or that this Guarantee may not be enforced in
or by such courts. The Guarantor hereby generally consents to service of process
at Cadwalader, Wickersham & Taft, 100 Maiden Lane, New York, New York 10038,
Attention: Managing Attorney, or such office of the Guarantor in New York City
as from time to time may be designated by the Guarantor in writing to the
Parties.

            7. Integration; Counterparts; Successors and Assigns; Headings. This
Guarantee (a) constitutes the entire agreement, and supersedes all prior
agreements and understandings, both written and oral, among the Guarantor and
the Parties, with respect to the subject matter hereof, (b) may be executed in
several counterparts, each of which shall be


                                      -4-
<PAGE>

deemed an original, but all of which together shall constitute one and the same
instrument, and (c) shall be binding upon the successors and assigns of the
Guarantor and shall inure to the benefit of, and shall be enforceable by, each
of the Parties to the fullest extent permitted by applicable laws. The headings
in this Guarantee are for purposes of reference only, and shall not limit or
otherwise affect the meanings hereof.

            8. Notices. All requests, notices or other communications hereunder
shall be in writing, addressed as follows:

            If to the Guarantor:

                        to the  address  or  telecopy  number set forth in the
                        Participation Agreement

            If to a Party:

                        to the  address  or  telecopy  number set forth in the
                        Participation Agreement

            All requests, notices or other communications shall be given in the
manner, and shall be effective at the times and under the terms, set forth in
Section 13(b) of the Participation Agreement.

            9. No Waivers. No failure on the part of any Party to exercise, no
delay in exercising, and no course of dealing with respect to, any right or
remedy hereunder will operate as a waiver thereof; nor will any single or
partial exercise of any right or remedy hereunder preclude any other or further
exercise of such right or remedy or the exercise of any other right or remedy.

            10. Survival. All representations and warranties contained herein or
made in writing by the Guarantor in connection herewith shall survive the
execution and delivery of this Guarantee regardless of any investigation made by
any Party or any other Person.

            11. Severability. To the fullest extent permitted by applicable law,
any provision of this Guarantee that is prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining
provisions hereof or any provision in any other Operative Document, and any such
prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

            12. GOVERNING LAW. THIS GUARANTEE IS DELIVERED IN, AND SHALL (AND
THE RIGHTS AND DUTIES OF THE GUARANTOR AND THE PARTIES SHALL) IN ALL RESPECTS BE
GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK, INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE. THIS
GUARANTEE SHALL BE DEEMED MADE WHEN DELIVERED IN NEW YORK, NEW YORK.


                                      -5-
<PAGE>

            13. Enforcement Expenses. The Guarantor agrees to pay to any Party
any and all reasonable costs and expenses (including reasonable legal fees and
expenses) incurred by such Party in enforcing, or collecting under, this
Guarantee.

            14. Termination. Subject to the provisions of Section 3 hereof, this
Guarantee shall terminate upon the indefeasible payment and performance in full
of all of the Obligations.


                                      -6-
<PAGE>

            IN WITNESS WHEREOF, the parties hereto have caused this Guarantee to
be duly executed as of the date first hereinabove set forth.

                                    NORTHWEST AIRLINES CORPORATION

                                    By: _____________________________________
                                        Name:
                                        Title:


STATE STREET BANK AND
TRUST COMPANY
  in its individual capacity
  and as Indenture Trustee

By: ___________________________________
    Name:
    Title:


STATE STREET BANK AND
TRUST COMPANY OF CONNECTICUT,
NATIONAL ASSOCIATION
  not in its individual capacity
  but solely as Pass Through Trustee

By: ___________________________________
    Name:
    Title:


STATE STREET BANK AND
TRUST COMPANY
  as Subordination Agent

By: ___________________________________
    Name:
    Title:
<PAGE>

                                   SCHEDULE I
                                  TO GUARANTEE
                                   [NW ____ _]

                                     PARTIES

State Street Bank and Trust Company, as Indenture Trustee

State Street Bank and Trust Company of Connecticut,  National Association,  as
   Pass Through Trustee

State Street Bank and Trust Company, as Subordination Agent



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