US AIRWAYS INC
8-K, 1998-12-29
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 Report (Date of earliest event reported):
                              December 14, 1998


                               US AIRWAYS, INC.

           (Exact name of registrant as specified in its charter)


     Delaware                     1-8442                     53-0218143
(State of Incorporation   (Commission File Number)         (IRS Employer
    of registrant)                                     Identification Number)


                              US Airways, Inc.
                  2345 Crystal Drive, Arlington, VA  22227
             (Address of principal executive offices)(zip code)

                               (703) 872-7000
            (Registrant's telephone number, including area code)


















Item 7.   Financial Information and Exhibits

     The following documents are being filed as Exhibits in connection with, 
and incorporated by reference into, US Airways, Inc.'s Registration Statement 
on Form S-3 (Registration No. 333-64425). The Registration Statement, and the 
Prospectus Supplement, dated December 4, 1998, to the Prospectus, dated No-
vember 17, 1998, relate to the offering of US Airways, Inc. Pass Through Cer-
tificates, Series 1998-1.

Reg. No.
333-64425
Exhibit No.   Document
- ----------    --------

4(a)(i)      Pass Through Trust Agreement, dated December 4,
             1998, between State Street Bank and Trust Company, 
             as Pass Through Trustee, and US Airways, Inc.*
4 (a)(ii)    Pass Through Trust Supplement No. 1998-1A, dated 
             December 14, 1998, between State Street Bank and 
             Trust Company, as Pass Through Trustee, and US 
             Airways, Inc.+
4 (a)(iii)   Pass Through Trust Supplement No. 1998-1B, dated 
             December 14, 1998, between State Street Bank and 
             Trust Company, as Pass Through Trustee, and US 
             Airways, Inc.+
4 (a)(iv)    Deposit Agreement (Class A), dated December 14, 
             1998, between First Security Bank, National 
             Association, as Escrow Agent, and Credit Suisse 
             First Boston, as Class A Depositary+
4 (a)(v)     Deposit Agreement (Class B), dated December 14, 
             1998, between First Security Bank, National 
             Association, as Escrow Agent, and Credit Suisse 
             First Boston, as Class B Depositary+
4 (a)(vi)    Revolving Credit Agreement (Class A), dated
             December 14, 1998, between  State Street Bank and 
             Trust Company, as Subordination Agent, and ABN AMRO 
             Bank N.V., as Liquidity Provider+
4 (a)(vii)   Revolving Credit Agreement (Class B), dated 
             December 14, 1998, between State Street Bank and 
             Trust Company, as Subordination Agent, and ABN AMRO 
             Bank N.V., as Liquidity Provider+
4 (a)(viii)  Revolving Credit Agreement (Class C), dated
             December 14, 1998, between State Street Bank and 
             Trust Company, as Subordination Agent, and ABN AMRO 
             Bank N.V., as Liquidity Provider+
4 (a)(ix)    Intercreditor Agreement, dated December 14, 1998, 
             among State Street Bank and Trust Company, as Pass 
             Through Trustee and as Subordination Agent, and ABN 
             AMRO Bank N.V., as Liquidity Provider+
4(a)(x)      Escrow and Paying Agent Agreement (Class A), dated 
             December 14, 1998, among First Security Bank, 
             National Association, as Escrow Agent, Morgan 
             Stanley & Co. Incorporated, Credit Suisse First 
             Boston Corporation, Lehman Brothers Inc. and
             Salomon Smith Barney Inc., as Underwriters, and 
             State Street Bank and Trust Company, as Class A 
             Trustee and as Paying Agent+
4(a)(xi)     Escrow and Paying Agent Agreement (Class B), dated 
             December 14, 1998, among First Security Bank, 
             National Association, as Escrow Agent, Morgan 
             Stanley & Co. Incorporated, Credit Suisse First 
             Boston Corporation, Lehman Brothers Inc. and 
             Salomon Smith Barney Inc., as Underwriters, and 
             State Street Bank and Trust Company, as Class B 
             Trustee and as Paying Agent+
4(a)(xii)    Note Purchase Agreement, dated December 14, 1998, 
             among US Airways, Inc., State Street Bank and Trust 
             Company, as Pass Through Trustee, Subordination 
             Agent, and as Paying Agent, and First Security 
             Bank, National Association, as Escrow Agent+
4(a)(xiii)   Exhibit A-1 to Note Purchase Agreement - Form of
             Leased Aircraft Participation Agreement+
4(a)(xiv)    Exhibit A-2 to Note Purchase Agreement - Form of
             Lease+
4(a)(xv)     Exhibit A-3 to Note Purchase Agreement - Form of 
             Leased Aircraft Indenture+
4(a)(xvi)    Exhibit A-4 to Note Purchase Agreement - Form of 
             Aircraft Purchase Agreement Assignment+
4(a)(xvii)   Exhibit A-5 to Note Purchase Agreement - Form of 
             Leased Aircraft Trust Agreement+
4(a)(xviii)  Exhibit C-1 to Note Purchase Agreement - Form of 
             Owned Aircraft Participation Agreement+ 
4(a)(xix)    Exhibit C-2 to Note Purchase Agreement - Form of 
             Owned Aircraft Indenture+
4(a)(xx)     Class A Global Certificate +
4(a)(xxi)    Class B Global Certificate +


+    Filed herewith.
*    Previously filed.  See Registration Statement on Form
     S-3(333-64425), filed with the Securities and Exchange
     Commission on September 28, 1998. 


































                             SIGNATURE

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

                               US AIRWAYS, INC.

December 28, 1998              By: /s/ Thomas A. Mutryn
                                   -----------------------
                                   Thomas A. Mutryn
                                   Senior Vice President, Finance
                                   Chief Financial Officer




EXHIBIT 4(a)(ii)











                     TRUST SUPPLEMENT No. 1998-1A
                    Dated as of December 14, 1998


                               between

                STATE STREET BANK AND TRUST COMPANY
                              as Trustee,


                                 and


                           US AIRWAYS, INC. 

                                  to

                   PASS THROUGH TRUST AGREEMENT
                   Dated as of December 4, 1998




              US Airways Pass Through Trust 1998-1A
                         6.85% US Airways
                    Pass Through Certificates,
                          Series 1998-1A

























     This Trust Supplement No. 1998-1A, dated as of December 14, 1998 (herein 
called the "Trust Supplement"), between US Airways, Inc., Inc., a Delaware 
corporation (the "Company"), and State Street Bank and Trust Company (the 
"Trustee"), to the Pass Through Trust Agreement, dated as of December 4, 
1998, between 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 (unless otherwise specified herein, capitalized terms 
used herein without definition having the respective meanings specified in 
the Basic Agreement) which may be issued thereunder, has heretofore been 
executed and delivered;

     WHEREAS, the Company obtained commitments from AVSA for the delivery of 
23 Aircraft;

     WHEREAS, the Company intends to finance the acquisition of each such 
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 Leased Aircraft, each Owner Trustee, acting 
on behalf of the corresponding Owner Participant, will issue pursuant to an 
Indenture, on a non-recourse basis, Equipment Notes in order to finance a 
portion of its purchase price of such Leased Aircraft;

     WHEREAS, in the case of each Owned Aircraft, the Company will issue 
pursuant to an Indenture, on a recourse basis, Equipment Notes to finance a 
portion of the purchase price of such Owned Aircraft;

     WHEREAS, the Trustee hereby declares the creation of this US Airways 
Pass Through Trust 1998-1A (the "Applicable Trust") for the benefit of the 
Applicable Certificateholders, and the initial Applicable Certificateholders 
as the grantors of the Applicable Trust, by their respective acceptances of 
the Applicable Certificates, join in the creation of the Applicable Trust 
with the Trustee;

     WHEREAS, all Certificates to be issued by the Applicable Trust will 
evidence fractional undivided interests in the Applicable Trust and will 
convey no rights, benefits or interests in respect of any property other than 
the Trust Property except for those Certificates to which an Escrow Receipt 
has been affixed;

                                     2


     WHEREAS, the Escrow Agent, the Trustee, the Escrow Paying Agent, and the 
Underwriters have contemporaneously herewith entered into an Escrow Agreement 
with the Escrow Paying Agent pursuant to which the Underwriters have 
delivered to the Escrow Agent a portion of the proceeds from the sale of the 
Applicable Certificates and have irrevocably instructed the Escrow Agent to 
withdraw and pay funds from such proceeds upon request and proper 
certification by the Trustee to purchase Equipment Notes as the remaining 
undelivered Aircraft are delivered by AVSA under the Aircraft Purchase 
Agreement from time to time prior to the Delivery Period Termination Date;

     WHEREAS, the Escrow Agent on behalf of the Applicable Certificateholders 
has contemporaneously herewith entered into a Deposit Agreement with the 
Depositary under which the Deposits referred to therein will be made and from 
which it will withdraw funds to allow the Trustee to purchase Equipment Notes 
from time to time prior to the Delivery Period Termination Date;

     WHEREAS, pursuant to the terms and conditions of the Basic Agreement as 
supplemented by this Trust Supplement (the "Agreement") and the Note Purchase 
Agreement, (i) on or shortly following the date hereof, the Trustee on behalf 
of the Applicable Trust, using a portion of the proceeds from the sale of the 
Applicable Certificates, shall purchase one or more Equipment Notes issued 
pursuant to the Participation Agreements relating to the Aircraft described 
in Exhibit C hereto (the "Delivered Aircraft Equipment Notes") in respect of 
each of five of the Aircraft (such five Aircraft being the "Delivered 
Aircraft") having the same interest rate as, and final maturity date not 
later than the final Regular Distribution Date of, the Applicable 
Certificates issued hereunder and (ii) with respect to each remaining 
Aircraft, the Trustee on behalf of the Applicable Trust, using funds 
withdrawn under the Escrow Agreement, shall purchase one or more Equipment 
Notes having the same interest rate as, and final maturity date not later 
than the final Regular Distribution Date of, the Applicable Certificates 
issued hereunder and, in each case, shall hold such Equipment Notes in trust 
for the benefit of the Applicable Certificateholders;

     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 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;

     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;

                                     3


     NOW THEREFORE, in consideration of the premises herein, it is agreed 
between 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 "6.85% US Airways Pass Through Certificates, Series 1998-1A" (hereinafter 
defined as the "Applicable Certificates").  Each Applicable Certificate 
represents a fractional undivided interest in the Applicable Trust created 
hereby.  The Applicable Certificates shall be the only instruments evidencing 
a fractional undivided interest in the Applicable Trust.

     The terms and conditions applicable to the Applicable Certificates are 
as follows:

     (a)     The aggregate principal amount of the Applicable Certificates 
that shall be authenticated under the Agreement (except for Applicable 
Certificates authenticated and delivered pursuant to Sections 3.03, 3.04 and 
3.06 of the Basic Agreement) is $366,486,000.

     (b)     The Regular Distribution Dates with respect to any payment of 
Scheduled Payments means January 30 and July 30 of each year, commencing on 
January 30, 1999, until payment of all of the Scheduled Payments to be made 
under the Equipment Notes has been made.

     (c)     The Special Distribution Dates with respect to the Applicable 
Certificates means any Business Day on which a Special Payment is to be 
distributed pursuant to the Agreement.

     (d)     At the Escrow Agent's request under the Escrow Agreement, the 
Trustee shall affix the corresponding Escrow Receipt to each Applicable 
Certificate.  In any event, any transfer or exchange of any Applicable 
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 
Applicable Certificate shall be permitted unless the corresponding Escrow 
Receipt is attached thereto and also is so transferred or exchanged.  By 
acceptance of any Applicable Certificate to which an Escrow Receipt is 
attached, each Holder of such an Applicable Certificate acknowledges and 
accepts the

                                     4

restrictions on transfer of the Escrow Receipt set forth herein and in the 
Escrow Agreement.

     (e)     (i)     The Applicable Certificates shall be in the form 
attached hereto as Exhibit A.  Any Person acquiring or accepting an 
Applicable Certificate or an interest therein will, by such acquisition or 
acceptance, be deemed to represent and warrant 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"), have not 
been used to purchase Applicable Certificates or an interest therein or (ii) 
the purchase and holding of Applicable Certificates is exempt from the 
prohibited transaction restrictions of ERISA and the Code pursuant to one or 
more prohibited transaction statutory or administrative exemptions.

     (ii)     The Applicable Certificates shall be Book-Entry Certificates 
and shall be subject to the conditions set forth in the Letter of 
Representations between the Company and the Clearing Agency attached hereto 
as Exhibit B.

     (f)     The Applicable Certificates are subject to the Intercreditor 
Agreement, the Deposit Agreement and the Escrow Agreement.

     (g)     The Applicable Certificates will have the benefit of the 
Liquidity Facility.

     (h)     The Responsible Party is the Company.

     (i)      The particular "sections of the Note Purchase Agreement", for 
purposes of clause (3) of Section 7.07 of the Basic Agreement, are Section 
6(b) (with respect to Owned Aircraft) and Section 6(c) (with respect to 
Leased Aircraft) of the relevant Participation Agreement.


                                ARTICLE II
                                DEFINITIONS

     Section 2.01.  Definitions.  For all purposes of the Basic Agreement as 
supplemented by this Trust Supplement, the following capitalized terms have 
the following meanings:

     Agreement:  Has the meaning specified in the recitals hereto.

                                     5


     Aircraft:  Means each of the New Aircraft or Substitute Aircraft in 
respect of which a Participation Agreement is entered into in accordance with 
the Note Purchase Agreement.

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

     Applicable Certificateholder:  Means the Person in whose name an 
Applicable Certificate is registered on the Register for the Applicable 
Certificates.

     Applicable Delivery Date:  Has the meaning specified in Section 5.01(b) 
of this Trust Supplement.

     Applicable Participation Agreement:  Has the meaning specified in 
Section 5.01(b) of this Trust Supplement.

     AVSA: Means AVSA, S.A.R.L.

     Business Day:  Means any day other than a Saturday, a Sunday or a day on 
which commercial banks are required or authorized to close in New York, New 
York, Salt Lake City, Utah, Pittsburgh, Pennsylvania, or, so long as any 
Applicable Certificate is outstanding, the city and state in which the 
Trustee or any Loan Trustee maintains its Corporate Trust Office or receives 
and disburses funds.

     Cut-off Date:  Means the earlier of (a) the Delivery Period Termination 
Date and (b) the date on which a Triggering Event occurs.

     Delivery Date:  Has the meaning specified in the Participation 
Agreements.

     Delivery Notice:  Has the meaning specified in the Participation 
Agreements.

     Delivery Period Termination Date:  Means the earlier of (a) October 31, 
1999 and (b) the date on which Equipment Notes issued with respect to all of 
the New Aircraft (or Substitute Aircraft in lieu thereof) have been purchased 
by the Applicable Trust and the Other Trusts in accordance with the Note 
Purchase Agreement.

     Deposits:  Has the meaning specified in the Deposit Agreement.

     Deposit Agreement:  Means the Deposit Agreement dated as of December 14, 
1998 relating to the Applicable Certificates between the Depositary and the 
Escrow 

                                  6


Agent, as the same may be amended, supplemented or otherwise modified from 
time to time in accordance with its terms.

     Depositary:  Means Credit Suisse First Boston, New York branch

     Distribution Date:  Means any Regular Distribution Date or Special 
Distribution Date as the context requires.

     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 December 14, 1998 relating to the Applicable Certificates, among the 
Escrow Agent, the Escrow Paying Agent, the Trustee and Underwriters, as the 
same may be amended, supplemented or otherwise modified from time to time in 
accordance with its terms.

     Escrow Paying Agent:  Means the Person acting as paying agent under the 
Escrow Agreement.

     Escrow Receipt:  Means the receipt substantially in the form annexed to 
the Escrow Agreement representing a fractional undivided interest in the 
funds held in escrow thereunder.

     Final Withdrawal:  Has the meaning specified in the Escrow Agreement.

     Final Withdrawal Date:  Has the meaning specified in the Escrow 
Agreement.

     Final Withdrawal Notice:  Has the meaning specified in Section 5.02 of 
this Trust Supplement.

     Indenture:  Means each of the separate trust indentures and mortgages 
relating to the Aircraft, each as specified or described in a Delivery Notice 
delivered pursuant to the related Participation Agreement, in each case as 
the same may be amended, supplemented or otherwise modified from time to time 
in accordance with its terms.

                              7


     Intercreditor Agreement:  Means the Intercreditor Agreement dated as of 
December 14, 1998 among the Trustee, the Other Trustees, the Liquidity 
Provider, the liquidity providers relating to the Certificates issued under 
(and as defined in) each of the Other Agreements, and State Street Bank and 
Trust Company, as Subordination Agent and as trustee thereunder, as amended, 
supplemented or otherwise modified from time to time in accordance with its 
terms.

     Investors:  Means the Underwriters together with all subsequent 
beneficial owners of the Applicable Certificates.

     Lease:  Means, with respect to each Leased Aircraft, the lease between 
an Owner Trustee, as the lessor, and the Company, as the lessee, referred to 
in the related Indenture, as such lease may be amended, supplemented or 
otherwise modified in accordance with its terms.

     Leased Aircraft:  Has the meaning specified in the third recital to this 
Trust Supplement. 

     Liquidity Facility:  Means, initially, the Revolving Credit Agreement 
dated as of December 14, 1998 relating to the Applicable Certificates, 
between the Liquidity Provider and State Street Bank and Trust Company as 
Subordination Agent, as agent and trustee for the Applicable Trust, and, from 
and after the replacement of such agreement pursuant to the Intercreditor 
Agreement, the replacement liquidity facility therefor, in each case as 
amended, supplemented or otherwise modified from time to time in accordance 
with their respective terms.

     Liquidity Provider:  Means, initially, ABN AMRO Bank N.V., acting 
through its Chicago Branch, and any replacements or successors therefor 
appointed in accordance with the Intercreditor Agreement.

     New Aircraft:  Has the meaning specified in the Note Purchase Agreement.

     Note Documents: Means the Note Purchase Agreement, this Trust Supplement 
and, with respect to any Equipment Note, means (i) the Indenture and the 
Participation Agreement relating to such Equipment Note, and (ii) in the case 
of any Equipment Note related to a Leased Aircraft, the Lease relating to 
such Leased Aircraft. 

     Note Purchase Agreement:  Means the Note Purchase Agreement dated as of 
December 14, 1998 among the Trustee, the Other Trustees, the Company, the 
Escrow Agent, the Escrow Paying Agent and the Subordination Agent, providing 
for, among other things, the purchase of certain Equipment Notes by the 
Trustee on behalf of the

                                8


Trust, as the same may be amended, supplemented or otherwise modified from 
time to time, in accordance with its terms.

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

     Other Agreements:  Means (i) the Basic Agreement as supplemented by 
Trust Supplement No. 1998-1B dated the date hereof relating to US Airways 
Pass Through Trust 1998-1B and (ii) the Basic Agreement as supplemented by 
Trust Supplement 1998-1C dated the date hereof relating to US Airways Pass 
Through Trust 1998-1C.

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

     Other Trusts:  Means the US Airways Pass Through Trust 1998-1B and the 
US Airways Pass Through Trust 1998-1C, each created on the date hereof.

     Owned Aircraft:  Has the meaning specified in the third recital to this 
Trust Supplement. 

     Owner Participant:  With respect to any Equipment Note relating to a 
Leased Aircraft, means the "Owner Participant" 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 relating to a Leased 
Aircraft, means the "Owner Trustee", 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 Indentures.

     Participation Agreement:  Means each Participation Agreement relating to 
the Aircraft described in Exhibit C hereto or to be entered into by the 
Trustee pursuant to the Note Purchase Agreement, as the same may be amended, 
supplemented or otherwise modified in accordance with its terms.

     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 

                                   9


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.

     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.

     Postponed Notes:  Means the Delivered Aircraft Equipment Notes having a 
scheduled Transfer Date of December 15, 1998 as specified in Exhibit C hereto 
and the Delivered Aircraft Equipment Notes to be held in the Trust as to 
which a Postponement Notice shall have been delivered pursuant to Section 
5.01(c).

     Postponement Notice:  Means an Officer's Certificate of the Company (i) 
requesting that the Trustee temporarily postpone purchase of one or more of 
the Delivered Aircraft Equipment Notes to a date which is later than the 
scheduled Transfer Date therefor as specified in Exhibit C hereto, (ii) 
identifying the amount of the purchase price of each such Equipment Note and 
the aggregate purchase price for all such Equipment Notes, (iii) setting 
forth the reasons for such postponement and (iv) with respect to each such 
Equipment Note, either (a) setting or resetting a new Transfer Date (which 
shall be on or prior to December 28, 1998 (the "Postponement 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 Postponement Cut-off Date) will be set by subsequent 
written notice not less than one Business Day prior to such new Transfer 
Date.

     Prospectus Supplement:  Means the Prospectus Supplement dated December 
4, 1998, relating to the offering of the Class A Certificates and Class B 
Certificates (as defined in the Intercreditor Agreement)

     Special Redemption Premium:  Means the premium payable by the Company in 
respect of the Final Withdrawal pursuant to the Note Purchase Agreement.

     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) or Special Redemption Premium.

                                 10


     Substitute Aircraft:  Has the meaning specified in the Note Purchase 
Agreement.

     Transfer Date:  Has the meaning assigned to the term "Delivery Date" in 
the Participation Agreement relating to each Delivered Aircraft.

     Triggering Event:  Has the meaning assigned to such term in the 
Intercreditor Agreement.

     Trust Property:  Means (i) subject to the Intercreditor Agreement, the 
Equipment Notes held as the property of the Applicable Trust, all monies at 
any time paid thereon and all monies due and to become due thereunder, (ii) 
funds from time to time deposited in the Certificate Account and the Special 
Payments Account and, subject to the Intercreditor Agreement, any proceeds 
from the sale by the Trustee pursuant to Article VI of the Basic Agreement of 
any Equipment Note and (iii) all rights of the Applicable Trust and the 
Trustee, on behalf of the Applicable Trust, under the Intercreditor 
Agreement, the Escrow 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 Applicable Trust pursuant to the Intercreditor Agreement or the Liquidity 
Facility, provided that rights with respect to the Deposits or under the 
Escrow Agreement, except for the right to direct withdrawals for the purchase 
of Equipment Notes to be held herein, will not constitute Trust Property.

     Underwriters:  Means, collectively, Morgan Stanley & Co. Incorporated, 
Credit Suisse First Boston Corporation, Lehman Brothers, Inc. and Salomon 
Smith Barney Inc.  

     Underwriting Agreement:  Means the Underwriting Agreement dated 
December 4, 1998 among the Underwriters and the Company, as the same may be 
amended, supplemented or otherwise modified from time to time in accordance 
with its terms.










                             11


                        ARTICLE III
     DISTRIBUTIONS; STATEMENTS TO CERTIFICATEHOLDERS

     Section 3.01.   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 Applicable 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 Escrow Paying Agent under Section 2.06 of the 
Escrow Agreement, not less than 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 3.02.  Statements to Applicable Certificateholders.   (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 Escrow 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;

                             12


     (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 
3.02(a) of this Trust Supplement.

     (c)      Promptly following (i) the Delivery Period Termination Date, if 
there has been any change in the information set forth in clauses (x), (y) 
and (z) below from that set 

                             13


forth in page S-35 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 Balances for each subsequent Regular Distribution Date 
following the Delivery Period Termination Date, (y) the related Pool Factors 
for such Regular Distribution Dates and (z) 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 Delivery 
Period Termination 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)     This Section 3.02 supersedes and replaces Section 4.03 of the 
Basic Agreement.


                          ARTICLE IV
                           DEFAULT

     Section 4.01.  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,

          (i)     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 4.01(a); and

                              14

          (ii)      each Class C Certificateholder shall have the right 
(which shall not expire upon any purchase of the Applicable Certificates 
pursuant to clause (i) 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 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 4.01(a).

     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 2.03(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 4.01(a).  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 

                              15


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 4.01(a), 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.

     (b)     This Section 4.01 supersedes and replaces Section 6.01(b) of the 
Basic Agreement.


                          ARTICLE V
                          THE TRUSTEE

     Section 5.01.  Delivery of Documents; Delivery Dates.  (a)  The Trustee 
is hereby directed (i) to execute and deliver the Intercreditor Agreement, 
the Escrow Agreement, the Note Purchase Agreement and the Participation 
Agreements relating to the Delivered Aircraft on or prior to the Issuance 
Date, 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 

                              16


forth, with respect to the Applicable Trust, in Schedule I to the 
Underwriting Agreement evidencing the entire ownership interest in the 
Applicable 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 and the Participation Agreements.  Except as provided in 
Sections 3.03, 3.04, 3.05 and 3.06 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 Delivery Notice relating to one or more Equipment 
Notes.  After receipt of a Delivery Notice and in any case no later than one 
Business Day prior to a Delivery Date as to which such Delivery Notice 
relates (the "Applicable Delivery Date"), the Trustee shall (as and when 
specified in the Delivery 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 
Delivery Notice.  The Trustee shall (as and when specified in such Delivery 
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 Delivery 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.  The provisions of this Section 
5.01(b) shall not apply to the Delivered Equipment Notes.  The provisions of 
this Section 5.01(b) and Section 5.01(c) hereof supersede and replace the 
provisions of Section 2.02 of the Basic Agreement (which are inapplicable to 
the Trust), and all provisions of the Basic Agreement relating to Postponed 
Notes and Section 

                            17


2.02 of the Basic Agreement shall not apply to the Applicable Trust, provided 
that (i) the reference in Section 2.03 of the Basic Agreement to "Section 
2.02 hereof" shall apply to the Applicable Trust and shall be deemed to refer 
to Section 5.01(c) of this Trust Supplement and (ii) for purposes of Section 
4.02(c) of the Basic Agreement, the reference to (x) "Postponed Notes" shall 
apply to the Applicable Trust and such term shall have the meaning specified 
herein and (y) "Section 2.02" shall apply to the Applicable Trust and shall 
be deemed a reference to Section 5.01(c) of this Trust Supplement.

     (c)     The Trustee shall purchase, pursuant to the terms and conditions 
of the Participation Agreements relating to the Delivered Aircraft, the 
Delivered Aircraft Equipment Notes on the Issuance Date or on December 15, 
1998, as specified in Exhibit C hereto.

     In the case of (x) the Delivered Aircraft Equipment Notes having a 
scheduled Transfer Date of December 15, 1998 and (y) any Delivered Aircraft 
Equipment Notes with respect to which the Company shall deliver to the 
Trustee a Postponement Notice, the Trustee shall deposit into an escrow 
account (the "Postponed Notes Escrow Account") to be maintained as part of 
the Applicable Trust an amount equal to the purchase price of such Postponed 
Notes (the "Postponed Notes Escrowed Funds").  The Postponed Notes Escrowed 
Funds so deposited shall be invested by the Trustee at the written direction 
of the Company in Specified Investments (i) maturing no later than any 
scheduled Transfer Date relating to the Postponed Notes 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 Postponed Notes 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 Postponed Notes 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 Participation Agreements on or prior to the 
Postponement Cut-off Date, the Trustee shall purchase the applicable 
Postponed Notes with the Postponed Notes Escrowed Funds withdrawn from the 
Postponed Notes 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 a Postponed Notes 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 of the Company in 
Specified Investments maturing as provided in the preceding paragraph.

     Any earnings or Specified Investments received from time to time by the 
Trustee shall be promptly distributed to the Company.  The Company shall pay 
to the Trustee 


                             18

for deposit to the Postponed Notes Escrow Account an amount equal to any 
losses on such Specified Investments as incurred.

     On the January 30, 1999 Regular Distribution Date, 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 the Company notifies the Trustee prior to the Postponement Cut-off 
Date that any Postponed Notes will not be issued on or prior to the 
Postponement Cut-off Date for any reason, on the next Special Distribution 
Date occurring not less than 15 days following the date of such notice (i) 
the Company shall pay to the Trustee for deposit in the 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 the 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 Postponed Notes 
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 the Postponement Cut-off Date, an amount equal to less than all 
of the Postponed Notes Escrowed Funds (other than Postponed Notes Escrowed 
Funds referred to in the immediately preceding paragraph) has been used to 
purchase Postponed Notes, on the next Special Distribution Date occurring not 
less than 15 days following the Postponement Cut-off Date (i) the Company 
shall pay to the Trustee for deposit in the 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 
Postponed Notes Escrowed Funds (other than Postponed Notes Escrowed Funds 
referred to in the immediately preceding paragraph) but not so purchased at a 
rate equal to the interest rate applicable to the Applicable Certificates 
from the Issuance Date to, but not including, such Special Distribution Date 
and (ii) the Trustee shall transfer such unused Postponed Notes 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 5.02.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 

                              19


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 under the Note Purchase Agreement for an 
amount equal to the Special Redemption Premium, such payment to be made on 
the Final Withdrawal Date.

     Section 5.03. The Trustee.  (a)  Subject to Section 5.04 of this Trust 
Supplement and Section 7.15 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 5.04.  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,

                                 20


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 enforce ability 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 5.05.  Trustee Liens.  The Trustee in its individual capacity 
agrees, in addition to the agreements contained in Section 7.17 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 VI
                   SUPPLEMENTAL AGREEMENTS


     Section 6.01.  Supplemental Agreements Without Consent of Applicable 
Certificateholders.  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 (9) 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 

                               21


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.

     Section 6.02.  Supplemental Agreements with Consent of Applicable 
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 Applicable Certificateholders approving such 
agreement or amendment or modifying in any manner the rights and obligations 
of such Applicable 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 Applicable 
Certificateholders of payments upon the Deposits; provided, further, that the 
provisions of Section 9.02(6) of the Basic Agreement shall not apply to the 
Applicable Trust and any supplemental agreement having the effect described 
in said Section 9.02(6) shall require only the consent of Applicable 
Certificateholders holding Applicable Certificates evidencing a Fractional 
Undivided Interest aggregating not less than a majority in interest in the 
Applicable Trust.


                          ARTICLE VII
                      TERMINATION OF TRUST

     Section 7.01.  Termination of the Trust.  The respective obligations and 
responsibilities of the Company and the Trustee with respect to the 
Applicable Trust shall terminate upon the distribution to all Applicable 
Certificateholders 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; provided, however, that in no event shall the 
Applicable Trust continue beyond 21 years less one day following the death of 
the last survivor of all descendants living on the date hereof of Joseph P. 
Kennedy, Sr., unless applicable law shall permit a longer term, in which case 
such longer term shall apply.

     Notice of any termination, specifying the Distribution Date upon which 
the Applicable Certificateholders may surrender their Applicable Certificates 
to the Trustee for payment of the final distribution and cancellation, shall 
be mailed promptly by the Trustee to Applicable Certificateholders not 
earlier than the 60th day and not later than the 15th day next preceding such 
final Distribution Date specifying (A) the Distribution Date upon which the 


                               22


proposed final payment of the Applicable Certificates will be made upon 
presentation and surrender of Applicable Certificates 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 
Distribution Date is not applicable, payments being made only upon 
presentation and surrender of the Applicable Certificates 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 Applicable 
Certificateholders.  Upon presentation and surrender of the Applicable 
Certificates in accordance with such notice, the Trustee shall cause to be 
distributed to Applicable Certificateholders such final payments.

     In the event that all of the Applicable Certificateholders shall not 
surrender their Applicable 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 Applicable 
Certificateholders to surrender their Applicable Certificates for 
cancellation and receive the final distribution with respect thereto.  No 
additional interest shall accrue on the Applicable Certificates after the 
Distribution Date specified in the first written notice.  In the event that 
any money held by the Trustee for the payment of distributions on the 
Applicable Certificates 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, the Owner Participants and the Company.


                        ARTICLE VIII
                        THE COMPANY

     Section 8.01.   Consolidation, Merges, Etc.  Section 5.02 of the Basic 
Agreement is hereby amended with respect to the Applicable Trust by deleting 
the word "and" at the end of clause (b) thereof, renumbering clause (c) as 
clause "(d)" and inserting a new clause (c) as follows:

     "(c) immediately after giving effect to such transaction, no Indenture 
Event of Default (in the case of an Owned Aircraft) or, in the case of a 
Leased Aircraft, Lease Event of Default (as defined in the related Indenture) 
shall have occurred and be continuing; and"

                             23


                         ARTICLE IX  
                  MISCELLANEOUS PROVISIONS

     Section 9.01. Basic Agreement Ratified.  Except and so far as herein 
expressly 



























                           24


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 9.02.  GOVERNING LAW.  THIS AGREEMENT AND THE APPLICABLE 
CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS 
OF THE STATE OF NEW YORK.

     Section 9.03.  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.

     Section 9.04.  Intention of Parties.  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 Internal Revenue 
Code of 1986, as amended, and not as a trust or association taxable as a 
corporation or as a partnership.  Each Applicable Certificateholder and 
Investor, by its acceptance of its Applicable Certificate or a beneficial 
interest therein, agrees to treat the Applicable Trust as a grantor trust for 
all U.S. federal, state and local income tax purposes.  The powers granted 
and obligations undertaken pursuant to the Agreement shall be so construed so 
as to further such intent.























                             25


     IN WITNESS WHEREOF, 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.

                                      US AIRWAYS, INC.

                                      By:______________________
                                        Name:  
                                        Title:   



                                      STATE STREET BANK AND TRUST
                                      COMPANY, as Trustee


                                      By:_____________________
                                        Name:
                                        Title:




                          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.]*



                 US AIRWAYS PASS THROUGH TRUST 1998-1A

      6.85% US Airways Pass Through Certificate, Series 1998-1A

                    Issuance Date: December 14, 1998

         Final Expected Distribution Date: January 30, 2018

        Evidencing A Fractional Undivided Interest In The US Airways
        Pass Through Trust 1998-1A, The Property Of Which Includes
        Certain Equipment Notes Each Secured By An Aircraft Leased
        To Or Owned By US Airways, Inc.


Certificate
No.___             $____________ Fractional Undivided Interest representing
                    0.000272862% 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 US Airways Pass Through Trust 1998-1A (the "Trust") created 
by State Street Bank and Trust Company, as


* This legend to appear on Book-Entry Certificates to be deposited with the 
Depository Trust Company

                             A-2


trustee (the "Trustee"), pursuant to a Pass Through Trust Agreement, dated as 
of December 4, 1998 (the "Basic Agreement"), between the Trustee and US 
Airways, Inc., Inc., a Delaware corporation (the "Company"), as supplemented 
by Trust Supplement No. 1998-1A thereto, dated as of December 14, 1998 (the 
"Trust Supplement" and, together with the Basic Agreement, the "Agreement"), 
between the Trustee 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 "6.85% US Airways Pass Through Certificates, 
Series 1998-1A" (herein called the "Certificates").  This Certificate is 
issued under and is subject to the terms, provisions and conditions of the 
Agreement.  By virtue of its acceptance hereof, the Certificateholder of this 
Certificate assents to and agrees to be bound by the provisions of the 
Agreement and the Intercreditor Agreement.  The property of the Trust 
includes certain Equipment Notes and all rights of the Trust to receive 
payments under the Intercreditor Agreement and any Liquidity Facility (the 
"Trust Property").  Each issue of the Equipment Notes is secured by, among 
other things, a security interest in an 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.

     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 January 30 and July 30 (a "Regular Distribution Date") 
commencing January 30, 1999, 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 

                             A-3


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 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.  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 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 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 therein, the transfer of this Certificate is registrable in the 
Register upon surrender of this 


                            A-4

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 issued in a 
different denomination.  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 and Investor, 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 Certificate 
holders 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.

     Any Person acquiring or accepting this Certificate or an interest herein 
will, by such acquisition or acceptance, be deemed to have represented and 
warranted 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"), have not been used to purchase this 
Certificate or an interest herein or (ii) the purchase and holding of this 
Certificate or interest herein are exempt from the prohibited transaction 
restrictions of ERISA and the Code pursuant to one or more prohibited 
transaction statutory or administration exemptions.

                            A-5


     THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND 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.

     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.






















                             A-6


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


                    US AIRWAYS PASS THROUGH TRUST 1998-1A
                    By:     STATE STREET BANK AND TRUST COMPANY,
                                 as Trustee


                            By:____________________________________
                              Name:
                              Title:






















           FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION


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


            By:      STATE STREET BANK AND TRUST COMPANY,
                                as Trustee


                          By:  __________________________
                             Name:
                             Title:





























                           EXHIBIT B
                           ---------




                [DTC Letter of Representations]
























                         EXHIBIT C


Aircraft Type and Registration No.    Scheduled Transfer Date
- ----------------------------------    -----------------------

  Airbus A319/N700UW                       December 15, 1998 

  Airbus A319/N701UW                       December 15, 1998

  Airbus A319/N702UW                       December 14, 1998

  Airbus A319/N703UW                       December 14, 1998

  Airbus A319/N704US                       December 15, 1998






EXHIBIT 4(a)(iii)






                         TRUST SUPPLEMENT No. 1998-1B
                        Dated as of December 14, 1998


                                   between

                     STATE STREET BANK AND TRUST COMPANY
                                 as Trustee,


                                     and


                              US AIRWAYS, INC.

                                     to

                         PASS THROUGH TRUST AGREEMENT
                         Dated as of December 4, 1998




                    US Airways Pass Through Trust 1998-1B
                              7.35% US Airways
                          Pass Through Certificates,
                               Series 1998-1B

























     This Trust Supplement No. 1998-1B, dated as of December 14, 1998 (herein 
called the "Trust Supplement"), between US Airways, Inc., Inc., a Delaware 
corporation (the "Company"), and State Street Bank and Trust Company (the 
"Trustee"), to the Pass Through Trust Agreement, dated as of December 4, 
1998, between 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 (unless otherwise specified herein, capitalized terms 
used herein without definition having the respective meanings specified in 
the Basic Agreement) which may be issued thereunder, has heretofore been 
executed and delivered;

     WHEREAS, the Company obtained commitments from AVSA for the delivery of 
23 Aircraft;

     WHEREAS, the Company intends to finance the acquisition of each such 
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 Leased Aircraft, each Owner Trustee, acting 
on behalf of the corresponding Owner Participant, will issue pursuant to an 
Indenture, on a non-recourse basis, Equipment Notes in order to finance a 
portion of its purchase price of such Leased Aircraft;

     WHEREAS, in the case of each Owned Aircraft, the Company will issue 
pursuant to an Indenture, on a recourse basis, Equipment Notes to finance a 
portion of the purchase price of such Owned Aircraft;

     WHEREAS, the Trustee hereby declares the creation of this US Airways 
Pass Through Trust 1998-1B (the "Applicable Trust") for the benefit of the 
Applicable Certificateholders, and the initial Applicable Certificateholders 
as the grantors of the Applicable Trust, by their respective acceptances of 
the Applicable Certificates, join in the creation of the Applicable Trust 
with the Trustee;

     WHEREAS, all Certificates to be issued by the Applicable Trust will 
evidence fractional undivided interests in the Applicable Trust and will 
convey no rights, benefits or interests in respect of any property other than 
the Trust Property except for those Certificates to which an Escrow Receipt 
has been affixed;


                                      2


     WHEREAS, the Escrow Agent, the Trustee, the Escrow Paying Agent, and the 
Underwriters have contemporaneously herewith entered into an Escrow Agreement 
with the Escrow Paying Agent pursuant to which the Underwriters have 
delivered to the Escrow Agent a portion of the proceeds from the sale of the 
Applicable Certificates and have irrevocably instructed the Escrow Agent to 
withdraw and pay funds from such proceeds upon request and proper 
certification by the Trustee to purchase Equipment Notes as the remaining 
undelivered Aircraft are delivered by AVSA under the Aircraft Purchase 
Agreement from time to time prior to the Delivery Period Termination Date;

     WHEREAS, the Escrow Agent on behalf of the Applicable Certificateholders 
has contemporaneously herewith entered into a Deposit Agreement with the 
Depositary under which the Deposits referred to therein will be made and from 
which it will withdraw funds to allow the Trustee to purchase Equipment Notes 
from time to time prior to the Delivery Period Termination Date;

     WHEREAS, pursuant to the terms and conditions of the Basic Agreement as 
supplemented by this Trust Supplement (the "Agreement") and the Note Purchase 
Agreement, (i) on or shortly following the date hereof, the Trustee on behalf 
of the Applicable Trust, using a portion of the proceeds from the sale of the 
Applicable Certificates, shall purchase one or more Equipment Notes issued 
pursuant to the Participation Agreements relating to the Aircraft described 
in Exhibit C hereto (the "Delivered Aircraft Equipment Notes") in respect of 
each of five of the Aircraft (such five Aircraft being the "Delivered 
Aircraft") having the same interest rate as, and final maturity date not 
later than the final Regular Distribution Date of, the Applicable 
Certificates issued hereunder and (ii) with respect to each remaining 
Aircraft, the Trustee on behalf of the Applicable Trust, using funds 
withdrawn under the Escrow Agreement, shall purchase one or more Equipment 
Notes having the same interest rate as, and final maturity date not later 
than the final Regular Distribution Date of, the Applicable Certificates 
issued hereunder and, in each case, shall hold such Equipment Notes in trust 
for the benefit of the Applicable Certificateholders;

     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 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;

     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;


                                      3


     NOW THEREFORE, in consideration of the premises herein, it is agreed 
between 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 "7.35% US Airways Pass Through Certificates, Series 1998-1B" (hereinafter 
defined as the "Applicable Certificates").  Each Applicable Certificate 
represents a fractional undivided interest in the Applicable Trust created 
hereby.  The Applicable Certificates shall be the only instruments evidencing 
a fractional undivided interest in the Applicable Trust.

     The terms and conditions applicable to the Applicable Certificates are 
as follows:

     (a)     The aggregate principal amount of the Applicable Certificates 
that shall be authenticated under the Agreement (except for Applicable 
Certificates authenticated and delivered pursuant to Sections 3.03, 3.04 and 
3.06 of the Basic Agreement) is $81,282,000.

     (b)     The Regular Distribution Dates with respect to any payment of 
Scheduled Payments means January 30 and July 30 of each year, commencing on 
January 30, 1999, until payment of all of the Scheduled Payments to be made 
under the Equipment Notes has been made.

     (c)     The Special Distribution Dates with respect to the Applicable 
Certificates means any Business Day on which a Special Payment is to be 
distributed pursuant to the Agreement.

     (d)     At the Escrow Agent's request under the Escrow Agreement, the 
Trustee shall affix the corresponding Escrow Receipt to each Applicable 
Certificate.  In any event, any transfer or exchange of any Applicable 
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 
Applicable Certificate shall be permitted unless the corresponding Escrow 
Receipt is attached thereto and also is so transferred or exchanged.  By 
acceptance of any Applicable Certificate to which an Escrow Receipt is 
attached, each Holder of such an Applicable Certificate acknowledges and 
accepts the restrictions on transfer of the Escrow Receipt set forth herein 
and in the Escrow Agreement.


                                      4


     (e)     (i)  The Applicable Certificates shall be in the form attached 
hereto as Exhibit A.  Any Person acquiring or accepting an Applicable 
Certificate or an interest therein will, by such acquisition or acceptance, 
be deemed to represent and warrant 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"), have not been 
used to purchase Applicable Certificates or an interest therein or (ii) the 
purchase and holding of Applicable Certificates is exempt from the prohibited 
transaction restrictions of ERISA and the Code pursuant to one or more 
prohibited transaction statutory or administrative exemptions.

             (ii)  The Applicable Certificates shall be Book-Entry 
Certificates and shall be subject to the conditions set forth in the Letter 
of Representations between the Company and the Clearing Agency attached 
hereto as Exhibit B.

     (f)     The Applicable Certificates are subject to the Intercreditor 
Agreement, the Deposit Agreement and the Escrow Agreement.

     (g)     The Applicable Certificates will have the benefit of the 
Liquidity Facility.

     (h)     The Responsible Party is the Company.

     (i)     The particular "sections of the Note Purchase Agreement", for 
purposes of clause (3) of Section 7.07 of the Basic Agreement, are Section 
6(b) (with respect to Owned Aircraft) and Section 6(c) (with respect to 
Leased Aircraft) of the relevant Participation Agreement.


                                  ARTICLE II
                                 DEFINITIONS

     Section 2.01.  Definitions.  For all purposes of the Basic Agreement as 
supplemented by this Trust Supplement, the following capitalized terms have 
the following meanings:

     Agreement:  Has the meaning specified in the recitals hereto.


                                     5


     Aircraft:  Means each of the New Aircraft or Substitute Aircraft in 
respect of which a Participation Agreement is entered into in accordance with 
the Note Purchase Agreement.

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

     Applicable Certificateholder:  Means the Person in whose name an 
Applicable Certificate is registered on the Register for the Applicable 
Certificates.

     Applicable Delivery Date:  Has the meaning specified in Section 5.01(b) 
of this Trust Supplement.

     Applicable Participation Agreement:  Has the meaning specified in 
Section 5.01(b) of this Trust Supplement.

     AVSA:  Means AVSA, S.A.R.L.

     Business Day:  Means any day other than a Saturday, a Sunday or a day on 
which commercial banks are required or authorized to close in New York, New 
York, Salt Lake City, Utah, Pittsburgh, Pennsylvania, or, so long as any 
Applicable Certificate is outstanding, the city and state in which the 
Trustee or any Loan Trustee maintains its Corporate Trust Office or receives 
and disburses funds.

     Cut-off Date:  Means the earlier of (a) the Delivery Period Termination 
Date and (b) the date on which a Triggering Event occurs.

     Delivery Date:  Has the meaning specified in the Participation 
Agreements.

     Delivery Notice:  Has the meaning specified in the Participation 
Agreements.

     Delivery Period Termination Date:  Means the earlier of (a) October 31, 
1999 and (b) the date on which Equipment Notes issued with respect to all of 
the New Aircraft (or Substitute Aircraft in lieu thereof) have been purchased 
by the Applicable Trust and the Other Trusts in accordance with the Note 
Purchase Agreement.

     Deposits:  Has the meaning specified in the Deposit Agreement.

     Deposit Agreement:  Means the Deposit Agreement dated as of December 14, 
1998 relating to the Applicable Certificates between the Depositary and the 
Escrow


                                      6


Agent, as the same may be amended, supplemented or otherwise modified from 
time to time in accordance with its terms.

     Depositary:  Means Credit Suisse First Boston, New York branch

     Distribution Date:  Means any Regular Distribution Date or Special 
Distribution Date as the context requires.

     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 December 14, 1998 relating to the Applicable Certificates, among the 
Escrow Agent, the Escrow Paying Agent, the Trustee and Underwriters, as the 
same may be amended, supplemented or otherwise modified from time to time in 
accordance with its terms.

     Escrow Paying Agent:  Means the Person acting as paying agent under the 
Escrow Agreement.

     Escrow Receipt:  Means the receipt substantially in the form annexed to 
the Escrow Agreement representing a fractional undivided interest in the 
funds held in escrow thereunder.

     Final Withdrawal:  Has the meaning specified in the Escrow Agreement.

     Final Withdrawal Date:  Has the meaning specified in the Escrow 
Agreement.

     Final Withdrawal Notice:  Has the meaning specified in Section 5.02 of 
this Trust Supplement.

     Indenture:  Means each of the separate trust indentures and mortgages 
relating to the Aircraft, each as specified or described in a Delivery Notice 
delivered pursuant to the related Participation Agreement, in each case as 
the same may be amended, supplemented or otherwise modified from time to time 
in accordance with its terms.


                                      7


     Intercreditor Agreement:  Means the Intercreditor Agreement dated as of 
December 14, 1998 among the Trustee, the Other Trustees, the Liquidity 
Provider, the liquidity providers relating to the Certificates issued under 
(and as defined in) each of the Other Agreements, and State Street Bank and 
Trust Company, as Subordination Agent and as trustee thereunder, as amended, 
supplemented or otherwise modified from time to time in accordance with its 
terms.

     Investors:  Means the Underwriters together with all subsequent 
beneficial owners of the Applicable Certificates.

     Lease:  Means, with respect to each Leased Aircraft, the lease between 
an Owner Trustee, as the lessor, and the Company, as the lessee, referred to 
in the related Indenture, as such lease may be amended, supplemented or 
otherwise modified in accordance with its terms.

     Leased Aircraft:  Has the meaning specified in the third recital to this 
Trust Supplement. 

     Liquidity Facility:  Means, initially, the Revolving Credit Agreement 
dated as of December 14, 1998 relating to the Applicable Certificates, 
between the Liquidity Provider and State Street Bank and Trust Company as 
Subordination Agent, as agent and trustee for the Applicable Trust, and, from 
and after the replacement of such agreement pursuant to the Intercreditor 
Agreement, the replacement liquidity facility therefor, in each case as 
amended, supplemented or otherwise modified from time to time in accordance 
with their respective terms.

     Liquidity Provider:  Means, initially, ABN AMRO Bank N.V., acting 
through its Chicago Branch, and any replacements or successors therefor 
appointed in accordance with the Intercreditor Agreement.

     New Aircraft:  Has the meaning specified in the Note Purchase Agreement.

     Note Documents: Means the Note Purchase Agreement, this Trust Supplement 
and with respect to any Equipment Note, means (i) the Indenture and the 
Participation Agreement relating to such Equipment Note, and (ii) in the case 
of any Equipment Note related to a Leased Aircraft, the Lease relating to 
such Leased Aircraft. 

     Note Purchase Agreement:  Means the Note Purchase Agreement dated as of 
December 14, 1998 among the Trustee, the Other Trustees, the Company, the 
Escrow Agent, the Escrow Paying Agent and the Subordination Agent, providing 
for, among other things, the purchase of certain Equipment Notes by the 
Trustee on behalf of the


                                     8


Trust, as the same may be amended, supplemented or otherwise modified from 
time to time, in accordance with its terms.

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

     Other Agreements:  Means (i) the Basic Agreement as supplemented by 
Trust Supplement No. 1998-1A dated the date hereof relating to US Airways 
Pass Through Trust 1998-1A and (ii) the Basic Agreement as supplemented by 
Trust Supplement 1998-1C dated the date hereof relating to US Airways Pass 
Through Trust 1998-1C.

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

     Other Trusts:  Means the US Airways Pass Through Trust 1998-1A and the 
US Airways Pass Through Trust 1998-1C, each created on the date hereof.

     Owned Aircraft:  Has the meaning specified in the third recital to this 
Trust Supplement. 

     Owner Participant:  With respect to any Equipment Note relating to a 
Leased Aircraft, means the "Owner Participant" 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 relating to a Leased 
Aircraft, means the "Owner Trustee", 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 Indentures.

     Participation Agreement:  Means each Participation Agreement relating to 
the Aircraft described in Exhibit C hereto or to be entered into by the 
Trustee pursuant to the Note Purchase Agreement, as the same may be amended, 
supplemented or otherwise modified in accordance with its terms.

     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


                                      9


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.

     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.

     Postponed Notes:  Means the Delivered Aircraft Equipment Notes having a 
scheduled Transfer Date of December 15, 1998 as specified in Exhibit C hereto 
and the Delivered Aircraft Equipment Notes to be held in the Trust as to 
which a Postponement Notice shall have been delivered pursuant to Section 
5.01(c).

     Postponement Notice:  Means an Officer's Certificate of the Company (i) 
requesting that the Trustee temporarily postpone purchase of one or more of 
the Delivered Aircraft Equipment Notes to a date which is later than the 
scheduled Transfer Date therefor as specified in Exhibit C hereto, (ii) 
identifying the amount of the purchase price of each such Equipment Note and 
the aggregate purchase price for all such Equipment Notes, (iii) setting 
forth the reasons for such postponement and (iv) with respect to each such 
Equipment Note, either (a) setting or resetting a new Transfer Date (which 
shall be on or prior to December 28, 1998 (the "Postponement 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 Postponement Cut-off Date) will be set by subsequent 
written notice not less than one Business Day prior to such new Transfer 
Date.

     Prospectus Supplement:  Means the Prospectus Supplement dated December 
4, 1998, relating to the offering of the Class A Certificates and Class B 
Certificates (as defined in the Intercreditor Agreement)

     Special Redemption Premium:  Means the premium payable by the Company in 
respect of the Final Withdrawal pursuant to the Note Purchase Agreement.

     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) or Special Redemption Premium.


                                     10


     Substitute Aircraft:  Has the meaning specified in the Note Purchase 
Agreement.

     Transfer Date:  Has the meaning assigned to the term "Delivery Date" in 
the Participation Agreement relating to each Delivered Aircraft.

     Triggering Event:  Has the meaning assigned to such term in the 
Intercreditor Agreement.

     Trust Property:  Means (i) subject to the Intercreditor Agreement, the 
Equipment Notes held as the property of the Applicable Trust, all monies at 
any time paid thereon and all monies due and to become due thereunder, (ii) 
funds from time to time deposited in the Certificate Account and the Special 
Payments Account and, subject to the Intercreditor Agreement, any proceeds 
from the sale by the Trustee pursuant to Article VI of the Basic Agreement of 
any Equipment Note and (iii) all rights of the Applicable Trust and the 
Trustee, on behalf of the Applicable Trust, under the Intercreditor 
Agreement, the Escrow 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 Applicable Trust pursuant to the Intercreditor Agreement or the Liquidity 
Facility, provided that rights with respect to the Deposits or under the 
Escrow Agreement, except for the right to direct withdrawals for the purchase 
of Equipment Notes to be held herein, will not constitute Trust Property.

     Underwriters:  Means, collectively, Morgan Stanley & Co. Incorporated, 
Credit Suisse First Boston Corporation, Lehman Brothers, Inc. and Salomon 
Smith Barney Inc.  

     Underwriting Agreement:  Means the Underwriting Agreement dated 
December 4, 1998 among the Underwriters and the Company, as the same may be 
amended, supplemented or otherwise modified from time to time in accordance 
with its terms.


                                     11


                                 ARTICLE III
             DISTRIBUTIONS; STATEMENTS TO CERTIFICATEHOLDERS

     Section 3.01.  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 Applicable 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 Escrow Paying Agent under Section 2.06 of the 
Escrow Agreement, not less than 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 3.02.  Statements to Applicable Certificateholders.  (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 Escrow 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;


                                     12


     (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 
3.02(a) of this Trust Supplement.

     (c)     Promptly following (i) the Delivery Period Termination Date, if 
there has been any change in the information set forth in clauses (x), (y) 
and (z) below from that set


                                     13


forth in page S-35 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 Balances for each subsequent Regular Distribution Date 
following the Delivery Period Termination Date, (y) the related Pool Factors 
for such Regular Distribution Dates and (z) 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 Delivery 
Period Termination 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)     This Section 3.02 supersedes and replaces Section 4.03 of the 
Basic Agreement.


                                 ARTICLE IV
                                   DEFAULT

     Section 4.01.  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 6.01(b) of the Basic Agreement, 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 4.01(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


                                     14


Triggering Event, each Class C Certificateholder shall have the right (which 
shall not expire upon any purchase of the Class A Certificates pursuant to 
clause (a) above) to purchase all, but not less than all, of the Applicable 
Certificates and the Class A Certificates upon ten days' written notice to 
the Trustee, the Class A 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 A 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 4.01(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 2.03(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 A 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 4.01(b).  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,


                                     15


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 4.01(a), the terms "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.

     (b)     This Section 4.01 supersedes and replaces Section 6.01(b) of the 
Basic Agreement.


                                  ARTICLE V
                                 THE TRUSTEE

     Section 5.01.  Delivery of Documents; Delivery Dates.  (a)  The Trustee 
is hereby directed (i) to execute and deliver the Intercreditor Agreement, 
the Escrow Agreement, the Note Purchase Agreement and the Participation 
Agreements relating to the Delivered Aircraft on or prior to the Issuance 
Date, 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 Applicable Trust, 
which amount equals the


                                     16


maximum aggregate principal amount of Equipment Notes which may be purchased 
by the Trustee pursuant to the Note Purchase Agreement and the Participation 
Agreements.  Except as provided in Sections 3.03, 3.04, 3.05 and 3.06 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 Delivery Notice relating to one or more Equipment 
Notes.  After receipt of a Delivery Notice and in any case no later than one 
Business Day prior to a Delivery Date as to which such Delivery Notice 
relates (the "Applicable Delivery Date"), the Trustee shall (as and when 
specified in the Delivery 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 
Delivery Notice.  The Trustee shall (as and when specified in such Delivery 
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 Delivery 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.  The provisions of this Section 
5.01(b) shall not apply to the Delivered aircraft Equipment Notes.  The 
provisions of this Section 5.01(b) and Section 5.01(c) hereof supersede and 
replace the provisions of Section 2.02 of the Basic Agreement (which are 
inapplicable to the Trust), and all provisions of the Basic Agreement 
relating to Postponed Notes and Section 2.02 of the Basic Agreement shall not 
apply to the Applicable Trust, provided that (i) the reference in Section 
2.03 of the Basic Agreement to "Section 2.02 hereof" shall apply to the


                                     17


Applicable Trust and shall be deemed to refer to Section 5.01(c) of this 
Trust Supplement and (ii) for purposes of Section 4.02(c) of the Basic 
Agreement, the reference to (x) "Postponed Notes" shall apply to the 
Applicable Trust and such term shall have the meaning specified herein and 
(y) "Section 2.02" shall apply to the Applicable Trust and shall be deemed a 
reference to Section 5.01(c) of this Trust Supplement.

     (c)     The Trustee shall purchase, pursuant to the terms and conditions 
of the Participation Agreements relating to the Delivered Aircraft, the 
Delivered Aircraft Equipment Notes on the Issuance Date or on December 15, 
1998, as specified in Exhibit C hereto.


     In the case of (x) the Delivered Aircraft Equipment Notes having a 
scheduled Transfer Date of December 15, 1998 and (y) any Delivered Aircraft 
Equipment Notes with respect to which the Company shall deliver to the 
Trustee a Postponement Notice relating to one or more Postponed Notes, the 
Trustee shall deposit into an escrow account (the "Postponed Notes Escrow 
Account") to be maintained as part of the Applicable Trust an amount equal to 
the purchase price of such Postponed Notes (the "Postponed Notes Escrowed 
Funds").  The Postponed Notes Escrowed Funds so deposited shall be invested 
by the Trustee at the written direction of the Company in Specified 
Investments (i) maturing no later than any scheduled Transfer Date relating 
to the Postponed Notes 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 Postponed Notes 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 Postponed Notes 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 
Participation Agreements on or prior to the Postponement Cut-off Date, the 
Trustee shall purchase the applicable Postponed Notes with the Postponed 
Notes Escrowed Funds withdrawn from the Postponed Notes 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 a Postponed Notes 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 of the Company in 
Specified Investments maturing as provided in the preceding paragraph.

     Any earnings or Specified Investments received from time to time by the 
Trustee shall be promptly distributed to the Company.  The Company shall pay 
to the Trustee


                                     18


for deposit to the Postponed Notes Escrow Account an amount equal to any 
losses on such Specified Investments as incurred.

     On the January 30, 1999 Regular Distribution Date, 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 the Company notifies the Trustee prior to the Postponement Cut-off 
Date that any Postponed Notes will not be issued on or prior to the 
Postponement Cut-off Date for any reason, on the next Special Distribution 
Date occurring not less than 15 days following the date of such notice (i) 
the Company shall pay to the Trustee for deposit in the 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 the 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 Postponed Notes 
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 the Postponement Cut-off Date, an amount equal to less than all 
of the Postponed Notes Escrowed Funds (other than Postponed Notes Escrowed 
Funds referred to in the immediately preceding paragraph) has been used to 
purchase Postponed Notes, on the next Special Distribution Date occurring not 
less than 15 days following the Postponement Cut-off Date (i) the Company 
shall pay to the Trustee for deposit in the 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 
Postponed Notes Escrowed Funds (other than Postponed Notes Escrowed Funds 
referred to in the immediately preceding paragraph) but not so purchased at a 
rate equal to the interest rate applicable to the Applicable Certificates 
from the Issuance Date to, but not including, such Special Distribution Date 
and (ii) the Trustee shall transfer such unused Postponed Notes 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 5.02.  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


                                     19


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 under the Note Purchase Agreement for an 
amount equal to the Special Redemption Premium, such payment to be made on 
the Final Withdrawal Date.

     Section 5.03.  The Trustee.  (a)  Subject to Section 5.04 of this Trust 
Supplement and Section 7.15 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 5.04.  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,

                                     20

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 enforce ability 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 5.05.  Trustee Liens.  The Trustee in its individual capacity 
agrees, in addition to the agreements contained in Section 7.17 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 VI
                            SUPPLEMENTAL AGREEMENTS

     Section 6.01.  Supplemental Agreements Without Consent of Applicable 
Certificateholders.  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 (9) 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

                                     21


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.

     Section 6.02.  Supplemental Agreements with Consent of Applicable 
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 Applicable Certificateholders approving such 
agreement or amendment or modifying in any manner the rights and obligations 
of such Applicable 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 Applicable 
Certificateholders of payments upon the Deposits; provided further that the 
provisions of Section 9.02(6) of the Basic Agreement shall not apply to the 
Applicable Trust and any supplemental agreement having the effect described 
in said Section 9.02(6) shall require only the consent of Applicable 
Certificateholders holding Applicable Certificates evidencing a Fractional 
Undivided Interest aggregating not less than a majority in interest in the 
Applicable Trust.


                                 ARTICLE VII
                             TERMINATION OF TRUST

     Section 7.01.  Termination of the Trust.  The respective obligations and 
responsibilities of the Company and the Trustee with respect to the 
Applicable Trust shall terminate upon the distribution to all Applicable 
Certificateholders 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; provided, however, that in no event shall the 
Applicable Trust continue beyond 21 years less one day following the death of 
the last survivor of all descendants living on the date thereof of Joseph P. 
Kennedy, Sr., unless applicable law shall permit a longer term, in which case 
such longer term shall apply.

     Notice of any termination, specifying the Distribution Date upon which 
the Applicable Certificateholders may surrender their Applicable Certificates 
to the Trustee for payment of the final distribution and cancellation, shall 
be mailed promptly by the Trustee to Applicable Certificateholders not 
earlier than the 60th day and not later than the 15th day next preceding such 
final Distribution Date specifying (A) the Distribution Date upon which the 
proposed final payment of the Applicable Certificates will be made upon 
presentation and

                                     22


surrender of Applicable Certificates 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 Distribution Date is not 
applicable, payments being made only upon presentation and surrender of the 
Applicable Certificates 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 Applicable Certificateholders.  Upon presentation and 
surrender of the Applicable Certificates in accordance with such notice, the 
Trustee shall cause to be distributed to Applicable Certificateholders such 
final payments.

     In the event that all of the Applicable Certificateholders shall not 
surrender their Applicable 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 Applicable 
Certificateholders to surrender their Applicable Certificates for 
cancellation and receive the final distribution with respect thereto.  No 
additional interest shall accrue on the Applicable Certificates after the 
Distribution Date specified in the first written notice.  In the event that 
any money held by the Trustee for the payment of distributions on the 
Applicable Certificates 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, the Owner Participants and the Company.


                                ARTICLE VIII
                                 THE COMPANY

     Section 8.01.  Consolidation, Merges, Etc.  Section 5.02 of the Basic 
Agreement is hereby amended with respect to the Applicable Trust by deleting 
the word "and" at the end of clause (b) thereof, renumbering clause (c) 
thereof as clause "(d)" and inserting a new clause (c) as follows:

     "(c) immediately after giving effect to such transaction, no Indenture 
Event of Default (in the case of an Owned Aircraft) or, in the case of a 
Leased Aircraft, Lease Event of Default (as defined in the related Indenture) 
shall have occurred and be continuing; and"

                                     23


                                 ARTICLE IX
                          MISCELLANEOUS PROVISIONS

     Section 9.01. 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 9.02.  GOVERNING LAW.  THIS AGREEMENT AND THE APPLICABLE 
CERTIFICATES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS 
OF THE STATE OF NEW YORK.

     Section 9.03.  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.

     Section 9.04.  Intention of Parties.  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 Internal Revenue 
Code of 1986, as amended, and not as a trust or association taxable as a 
corporation or as a partnership.  Each Applicable Certificateholder and 
Investor, by its acceptance of its Applicable Certificate or a beneficial 
interest therein, agrees to treat the Applicable Trust as a grantor trust for 
all U.S. federal, state and local income tax purposes.  The powers granted 
and obligations undertaken pursuant to the Agreement shall be so construed so 
as to further such intent.















                                     24


     IN WITNESS WHEREOF, 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.

                                              US AIRWAYS, INC.


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



                                              STATE STREET BANK AND TRUST
                                              COMPANY, as Trustee


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















                                  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.]*



                    US AIRWAYS PASS THROUGH TRUST 1998-1B

          7.35% US Airways Pass Through Certificate, Series 1998-1B

                      Issuance Date: December 14, 1998

             Final Expected Distribution Date: January 30, 2018

  Evidencing A Fractional Undivided Interest In The US Airways Pass Through  
  Trust 1998-1B, The Property Of Which Includes Certain Equipment Notes Each
  Secured By An Aircraft Leased To Or Owned By US Airways, Inc.


Certificate
No.______      $__________Fractional Undivided Interest representing
                          0.001230284% 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 US Airways Pass Through Trust 1998-1B (the "Trust") created 
by State Street Bank and Trust Company, as trustee (the "Trustee"), pursuant 
to a Pass Through Trust Agreement, dated as of December 4,

_______________________________
* This legend to appear on Book-Entry Certifictaes to be deposited with the 
Depository Trust Company.

                                     A-2


1998 (the "Basic Agreement"), between the Trustee and US Airways, Inc., Inc., 
a Delaware corporation (the "Company"), as supplemented by Trust Supplement 
No. 1998-1B thereto, dated as of December 14, 1998 (the "Trust Supplement" 
and, together with the Basic Agreement, the "Agreement"), between the Trustee 
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 "7.35% 
US Airways Pass Through Certificates, Series 1998-1B" (herein called the 
"Certificates").  This Certificate is issued under and is subject to the 
terms, provisions and conditions of the Agreement.  By virtue of its 
acceptance hereof, the Certificateholder of this Certificate assents to and 
agrees to be bound by the provisions of the Agreement and the Intercreditor 
Agreement.  The property of the Trust includes certain Equipment Notes and 
all rights of the Trust to receive payments under the Intercreditor Agreement 
and any Liquidity Facility (the "Trust Property").  Each issue of the 
Equipment Notes is secured by, among other things, a security interest in an 
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.

     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 January 30 and July 30 (a "Regular Distribution Date") 
commencing January 30, 1999, 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

                                     A-3


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 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.  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 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 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 therein, the transfer of this Certificate is registrable in the 
Register upon surrender of this

                                     A-4


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 issued in a 
different denomination.  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 and Investor, 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 Certificate 
holders 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.

     Any Person acquiring or accepting this Certificate or an interest herein 
will, by such acquisition or acceptance, be deemed to have represented and 
warranted 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"), have not been used to purchase this 
Certificate or an interest herein or (ii) the purchase and holding of this 
Certificate or interest herein are exempt from the prohibited transaction 
restrictions of ERISA and the Code pursuant to one or more prohibited 
transaction statutory or administration exemptions.

                                     A-5


     THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND 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.

     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.


















                                     A-6


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


                           US AIRWAYS PASS THROUGH TRUST 1998-1B

                           By:  STATE STREET BANK AND TRUST COMPANY,
                                    as Trustee


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





















             FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION


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


                               By:  STATE STREET BANK AND TRUST COMPANY,
                                            as Trustee


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


























                                  EXHIBIT B


                       [DTC Letter of Representations]
































                                     B-2


                                  EXHIBIT C


      Aircraft Type and Registration No.           Scheduled Transfer Date
      ----------------------------------           -----------------------

            Airbus A319/N700UW                        December 15, 1998 

            Airbus A319/N701UW                        December 15, 1998

            Airbus A319/N702UW                        December 14, 1998

            Airbus A319/N703UW                        December 14, 1998

            Airbus A319/N704US                        December 15, 1998






EXHIBIT 4(a)(iv)



















                            DEPOSIT AGREEMENT
                                 (Class A)

                       Dated as of December 14, 1998


                                  between


                  FIRST SECURITY BANK, NATIONAL ASSOCIATION
                              as Escrow Agent

                                     and

                 CREDIT SUISSE FIRST BOSTON, New York Branch

                               as Depositary



























                              TABLE OF CONTENTS
                              -----------------

                                                                     Page
                                                                     ----

ARTICLE I    FORMATION OF DEPOSITS                                      2
             Section 1.1  Acceptance of Depositary                      2
             Section 1.2  Establishment of Accounts                     2
 
ARTICLE II   MAINTENANCE OF DEPOSITS                                    3
             Section 2.1  Deposits                                      3
             Section 2.2  Interest                                      3
             Section 2.3  Withdrawals                                   3
             Section 2.4  Other Accounts                                4

ARTICLE III  TERMINATION                                                5

ARTICLE IV   PAYMENTS                                                   5

ARTICLE V    REPRESENTATIONS AND WARRANTIES                             6

ARTICLE VI   TRANSFER                                                   7

ARTICLE VII  AMENDMENT                                                  7

ARTICLE VIII NOTICES                                                    7

ARTICLE IX   OBLIGATIONS UNCONDITIONAL                                  8

ARTICLE X    ENTIRE AGREEMENT                                           8

ARTICLE XI   GOVERNING LAW                                              8

ARTICLE XII  WAIVER OF JURY TRIAL RIGHT                                 9

ARTICLE XIII COUNTERPARTS                                               9



                                      i


ARTICLE XIV  HEAD OFFICE OBLIGATION                                     9








Schedule I   Schedule of Deposits

Exhibit A    Notice of Purchase Withdrawal

Exhibit B    Notice of Final Withdrawal




















                                      ii


     This DEPOSIT AGREEMENT (Class A) dated as of December 14, 1998 (as 
amended, modified or supplemented from time to time, this "Agreement") 
between First Security Bank, National Association, a national banking 
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 Credit Suisse First Boston, a banking 
institution organized under the laws of Switzerland acting through its New 
York branch, as depositary bank (the "Depositary").


                             W I T N E S S E T H
                             - - - - - - - - - - 

     WHEREAS, US Airways, Inc. ("US Airways") and State Street Bank and Trust 
Company, 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 December  14, 1998, to the Pass Through Trust 
Agreement dated as of December 4, 1998 (together, as amended, modified or 
supplemented from time to time in accordance with the terms thereof, the 
"Pass Through Trust Agreement") relating to US Airways Pass Through Trust 
1998-1A pursuant to which the US Airways Pass Through Trust, Series 1998-1A 
Certificates referred to therein (the "Certificates") are being issued; 

     WHEREAS, US Airways and Morgan Stanley & Co. Incorporated, Credit Suisse 
First Boston Corporation, Lehman Brothers Inc. and Salomon Smith Barney 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 December 
4, 1998 pursuant to which the Pass Through Trustee will issue and sell the 
Certificates to the Underwriters; 

     WHEREAS, US Airways, 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 US 
Airways, 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 on behalf of the Investors 
pursuant to the Escrow and Paying Agent Agreement, subject to withdrawal upon 
request of and proper certification by the Pass Through Trustee for 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 I
                             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


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 II
                           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 official check or checks or wire or 
other transfer to: Bank of New York, Reference: US Airways 1998-1, ABA# 
021000018, Account # 8900329238, and the Depositary shall accept from the 
Underwriters, on behalf of the Escrow Agent, the sum of US$291,181,330.  Upon 
acceptance of such sum, the Depositary shall (i) establish each of the 
deposits specified in Schedule I hereto maturing on the respective dates set 
forth therein (including any deposit made pursuant to 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 date of withdrawal at the 
rate of 6.85% 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 semi-
annually in arrears on each January 30 and July 30, commencing on January 30, 
1999 (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.

     Section 2.3  Withdrawals.  (a) On and after the date seven (7) days 
after the establishment of any 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 Deposit, except that at any time 
prior to the actual withdrawal of 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

                                      3


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, Pittsburgh, Pennsylvania, 
Boston, Massachusetts or Salt Lake City, Utah.

          (b) 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 November 1, 1999 and there are 
unwithdrawn Deposits on such date, the Depositary shall pay the amount of the 
Final Withdrawal to the Paying Agent on November 16, 1999.

          (c) 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 November 15, 1999 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.

                                      4


                                 ARTICLE III
                                 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 IV
                                   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 at State Street Bank and Trust Company, 2 International Place, 
4th Floor, Boston, MA  02110, ABA#011-0000-28, Account #9903-9901, Attention: 
Melissa Lewandowski, Reference: US Airways 1998-1 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.  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.  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 
Switzerland 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

                                      5


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 V
                       REPRESENTATIONS AND WARRANTIES
                       ------------------------------

     The Depositary hereby represents and warrants to US Airways, 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 New York through its 
New York 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;

          (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

                                      6


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 VI
                                  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 VII
                                  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.

                                 ARTICLE VIII
                                   NOTICES
                                   -------

     Unless otherwise expressly provided herein, any notice or other 
communication under this Agreement shall be in writing (including by 
facsimile) and

                                      7


shall be deemed to be given and effective upon receipt thereof.  All notices 
shall be sent to (x) in the case of the Depositary, Credit Suisse First 
Boston, 11 Madison Avenue, New York, New York 10010, Attention:  Robert 
Finney and Jennifer Toth (Telecopier: (212) 325-8319) or (y) 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), in each case, with a copy to the Pass Through 
Trustee, State Street Bank and Trust Company, 2 International Place, 4th 
Floor, Boston, MA  02110 (Telecopier:  (617) 664-5151) and to US Airways, US 
Airways, Inc., 2345 Crystal Drive, Arlington, VA 22227, Attention: Treasurer 
(Telecopier:  (703) 872-5936) (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 IX
                          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 X
                               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.

                                 ARTICLE XI
                                GOVERNING LAW
                                -------------

     THIS AGREEMENT, AND THE RIGHTS AND OBLIGATIONS OF THE DEPOSITARY AND THE 
ESCROW AGENT WITH RESPECT TO THE

                                      8


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 XII
                          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 XIII
                                COUNTERPARTS
                                ------------

     This Agreement may be executed in one or more counterparts, all of which 
taken together shall constitute one instrument.

                                 ARTICLE XIV
                           HEAD OFFICE OBLIGATION
                           ----------------------

     Credit Suisse First Boston hereby agrees that the obligations of the 
Depositary hereunder are also the obligations of Credit Suisse First Boston's 
Head Office in Zurich, Switzerland.  Accordingly, any beneficiary of this 
Agreement will be able to proceed directly against Credit Suisse First 
Boston's Head Office in Zurich, Switzerland if Credit Suisse First Boston's 
New York branch defaults in its obligation to such beneficiary under this 
Agreement.







                                      9


     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:




                                          CREDIT SUISSE FIRST BOSTON, 
                                          New York Branch, as Depositary 


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



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









                                                               Schedule I

                            SCHEDULE OF DEPOSITS
                            --------------------
                                  (Class A)


   DATE       TAIL NO.       DEPOSIT       ACCOUNT NO.       MATURITY DATE
                             AMOUNT

 12/14/98     N705UW       $15,073,333     8900329238         10/31/1999

 12/14/98     N101UW        17,594,667     8900329238         10/31/1999

 12/14/98     N706US        15,253,333     8900329238         10/31/1999

 12/14/98     N707UW        15,253,333     8900329238         10/31/1999

 12/14/98     N708UW        15,264,000     8900329238         10/31/1999

 12/14/98     N709UW        15,273,333     8900329238         10/31/1999

 12/14/98     N102UW        17,777,333     8900329238         10/31/1999

 12/14/98     N103US        17,777,333     8900329238         10/31/1999

 12/14/98     N710UW        15,412,000     8900329238         10/31/1999

 12/14/98     N104UW        17,789,333     8900329238         10/31/1999

 12/14/98     N105UW        17,789,333     8900329238         10/31/1999

 12/14/98     N711UW        15,421,333     8900329238         10/31/1999

 12/14/98     N712US        15,421,333     8900329238         10/31/1999

 12/14/98     N106US        17,937,333     8900329238         10/31/1999

 12/14/98     N713UW        15,536,000     8900329238         10/31/1999

 12/14/98     N714US        15,536,000     8900329238         10/31/1999

 12/14/98     N715UW        15,536,000     8900329238         10/31/1999

 12/14/98     N716UW        15,536,000     8900329238         10/31/1999


                                    S-1

















































                                    S-2


                                                                EXHIBIT A
                                                                ---------


                         NOTICE OF PURCHASE WITHDRAWAL
                         -----------------------------


CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, NY  10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class A) dated as of 
December 14, 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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:___________, ____


                                    A-1


                                                                EXHIBIT B
                                                                ---------

                          NOTICE OF FINAL WITHDRAWAL
                          --------------------------


CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, New York  10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class A) dated as of 
December 14 , 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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 State Street 
Bank and Trust Company, ABA #011-0000-28, Account #9903-9901, Attention: 
Melissa Lewandowski, Reference: US Airways 1998-1 EETC.

                                           FIRST SECURITY BANK, NATIONAL 
                                           ASSOCIATION, 
                                           as Escrow Agent 


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

Dated:__________, ____



                                      B-1







EXHIBIT 4(a)(v)













                         DEPOSIT AGREEMENT
                            (Class B)

                   Dated as of December 14, 1998


                             between


           FIRST SECURITY BANK, NATIONAL ASSOCIATION
                         as Escrow Agent

                               and

           CREDIT SUISSE FIRST BOSTON, New York Branch

                         as Depositary

































                       TABLE OF CONTENTS
                       -----------------
                                                              Page
                                                              ----
ARTICLE I      FORMATION OF DEPOSITS                            2
               Section 1.1   Acceptance of Depositary           2
               Section 1.2   Establishment of Accounts          2

ARTICLE II     MAINTENANCE OF DEPOSITS                          3
               Section 2.1   Deposits                           3
               Section 2.2   Interest                           3
               Section 2.3   Withdrawals                        3
               Section 2.4   Other Accounts                     4

ARTICLE III    TERMINATION                                      5

ARTICLE IV     PAYMENTS                                         5

ARTICLE V      REPRESENTATIONS AND WARRANTIES                   6

ARTICLE VI     TRANSFER                                         7

ARTICLE VII    AMENDMENT                                        7

ARTICLE VIII   NOTICES                                          7

ARTICLE IX     OBLIGATIONS UNCONDITIONAL                        8

ARTICLE X      ENTIRE AGREEMENT                                 8

ARTICLE XI     GOVERNING LAW                                    8

ARTICLE XII    WAIVER OF JURY TRIAL RIGHT                       9

ARTICLE XIII   COUNTERPARTS                                     9


                                       i


ARTICLE XIV    HEAD OFFICE OBLIGATION                           9






Schedule I     Schedule of Deposits

Exhibit A      Notice of Purchase Withdrawal

Exhibit B      Notice of Final Withdrawal





                                      ii

     This DEPOSIT AGREEMENT (Class B) dated as of December 14, 1998 (as 
amended, modified or supplemented from time to time, this "Agreement") 
between First Security Bank, National Association, a national banking 
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 Credit Suisse First Boston, a banking 
institution organized under the laws of Switzerland acting through its New 
York branch, as depositary bank (the "Depositary").


                            W I T N E S S E T H
                            -------------------


     WHEREAS, US Airways, Inc. ("US Airways") and State Street Bank and Trust 
Company, 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 December 14, 1998, to the Pass Through Trust 
Agreement dated as of December 4, 1998 (together, as amended, modified or 
supplemented from time to time in accordance with the terms thereof, the 
"Pass Through Trust Agreement") relating to US Airways Pass Through Trust 
1998-1B pursuant to which the US Airways Pass Through Trust, Series 1998-1B 
Certificates referred to therein (the "Certificates") are being issued; 

     WHEREAS, US Airways and Morgan Stanley & Co. Incorporated, Credit Suisse 
First Boston Corporation, Lehman Brothers Inc. and Salomon Smith Barney 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 December 
4, 1998 pursuant to which the Pass Through Trustee will issue and sell the 
Certificates to the Underwriters; 

     WHEREAS, US Airways, 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 US 
Airways, 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 on behalf of the Investors 
pursuant to the Escrow and Paying Agent Agreement, subject to withdrawal upon 
request of and proper certification by the Pass Through Trustee for 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 I
                          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


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 II
                         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 official check or checks or wire or 
other transfer to: Bank of New York, Reference: US Airways 1998-1, ABA# 
021000018, Account # 8900329238, and the Depositary shall accept from the 
Underwriters, on behalf of the Escrow Agent, the sum of US$64,114,059.  Upon 
acceptance of such sum, the Depositary shall (i) establish each of the 
deposits specified in Schedule I hereto maturing on the respective dates set 
forth therein (including any deposit made pursuant to 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 date of withdrawal at the 
rate of  7.35% 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 semi-
annually in arrears on each January 30 and July 30, commencing on January 30, 
1999 (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.

     Section 2.3  Withdrawals.  (a) On and after the date seven (7) days 
after the establishment of any 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 Deposit, except that at any time 
prior to the actual withdrawal of 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

                                      3


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, Pittsburgh, Pennsylvania, 
Boston, Massachusetts or Salt Lake City, Utah.

          (b) 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 November 1, 1999 and there are 
unwithdrawn Deposits on such date, the Depositary shall pay the amount of the 
Final Withdrawal to the Paying Agent on November 16, 1999.

          (c)  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 November 15, 1999 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.

                                      4


                                ARTICLE III
                                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 IV
                                 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 at State Street Bank and Trust Company, 2 International Place, 
4th Floor, Boston, MA  02110, ABA#011-0000-28, Account #9903-9901, Attention: 
Melissa Lewandowski, Reference: US Airways 1998-1 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.  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.  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 
Switzerland 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

                                      5


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 V
                      REPRESENTATIONS AND WARRANTIES
                      ------------------------------

     The Depositary hereby represents and warrants to US Airways, 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 New York through its 
New York 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;

          (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

                                      6


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 VI
                                 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 VII
                                 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.

                                ARTICLE VIII
                                   NOTICES
                                   -------

     Unless otherwise expressly provided herein, any notice or other 
communication under this Agreement shall be in writing (including by 
facsimile) and

                                      7


shall be deemed to be given and effective upon receipt thereof.  All notices 
shall be sent to (x) in the case of the Depositary, Credit Suisse First 
Boston, 11 Madison Avenue, New York, New York 10010, Attention:  Robert 
Finney and Jennifer Toth (Telecopier: (212) 325-8319) or (y) 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), in each case, with a copy to the Pass Through 
Trustee, State Street Bank and Trust Company, 2 International Place, 4th 
Floor, Boston, MA  02110 (Telecopier:  (617) 664-5151) and to US Airways, US 
Airways, Inc., 2345 Crystal Drive, Arlington, VA 22227, Attention: Treasurer 
(Telecopier:  (703) 872-5936) (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 IX
                       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 X
                            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.

                                ARTICLE XI
                              GOVERNING LAW
                              -------------

     THIS AGREEMENT, AND THE RIGHTS AND OBLIGATIONS OF THE DEPOSITARY AND THE 
ESCROW AGENT WITH RESPECT TO THE

                                      8


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 XII
                        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 XIII
                                COUNTERPARTS
                                ------------

      This Agreement may be executed in one or more counterparts, all of 
which taken together shall constitute one instrument.  

                                ARTICLE XIV
                         HEAD OFFICE OBLIGATION
                         ----------------------

     Credit Suisse First Boston hereby agrees that the obligations of the 
Depositary hereunder are also the obligations of Credit Suisse First Boston's 
Head Office in Zurich, Switzerland.  Accordingly, any beneficiary of this 
Agreement will be able to proceed directly against Credit Suisse First 
Boston's Head Office in Zurich, Switzerland if Credit Suisse First Boston's 
New York branch defaults in its obligation to such beneficiary under this 
Agreement.




                                      9


     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:







                         CREDIT SUISSE FIRST BOSTON, New
                         York Branch, as Depositary


                         By_____________________________
                           Name:
                           Title:


                         By_____________________________
                           Name:
                           Title:






























                                                          Schedule I

                       SCHEDULE OF DEPOSITS
                       --------------------
                            (Class B)



DATE       TAIL NO.   DEPOSIT   ACCOUNT NO.    MATURITY DATE
                      AMOUNT

12/14/98   N705UW  $3,523,910   8900329238      10/31/1999

12/14/98   N101UW   4,706,573   8900329238      10/31/1999

12/14/98   N706US   3,414,504   8900329238      10/31/1999

12/14/98   N707UW   3,249,879   8900329238      10/31/1999

12/14/98   N708UW   3,387,021   8900329238      10/31/1999

12/14/98   N709UW   3,406,805   8900329238      10/31/1999

12/14/98   N102UW   3,100,808   8900329238      10/31/1999

12/14/98   N103US   4,179,107   8900329238      10/31/1999

12/14/98   N710UW   3,353,182   8900329238      10/31/1999

12/14/98   N104UW   4,069,042   8900329238      10/31/1999

12/14/98   N105UW   4,069,042   8900329238      10/31/1999

12/14/98   N711UW   3,369,900   8900329238      10/31/1999

12/14/98   N712US   3,369,900   8900329238      10/31/1999

12/14/98   N106US   3,846,114   8900329238      10/31/1999

12/14/98   N713UW   3,292,757   8900329238      10/31/1999

12/14/98   N714US   3,292,757   8900329238      10/31/1999

12/14/98   N715UW   3,241,379   8900329238      10/31/1999

12/14/98   N716UW   3,241,379   8900329238      10/31/1999











                                     S-1



























































                                     S-2


                                                         EXHIBIT A
                                                         ---------


                     NOTICE OF PURCHASE WITHDRAWAL
                     -----------------------------

CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, NY  10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class B) dated as of 
December 14, 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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:__________, _____










                                     A-1


                                                      EXHIBIT B
                                                      ---------

                   NOTICE OF FINAL WITHDRAWAL
                   --------------------------


CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, New York 10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class B) dated as of 
December 14 , 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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 State Street 
Bank and Trust Company, ABA#011-0000-28, Account #9903-9901, Attention: 
Melissa Lewandowski, Reference: US Airways 1998-1 EETC.

                         FIRST SECURITY BANK, NATIONAL 
                         ASSOCIATION, 
                         as Escrow Agent 



                           By______________________
                             Name:
                             Title:

Dated:__________, _____




                                     B-1




EXHIBIT 4(a)(vi)


       _______________________________________________________________


                          REVOLVING CREDIT AGREEMENT
                                  (1998-1A)


                        Dated as of December 14, 1998

                                   between

                     STATE STREET BANK and TRUST COMPANY,

                           as Subordination Agent,
                         as agent and trustee for the
                    US Airways Pass Through Trust 1998-1A

                                 as Borrower

                                     and

                              ABN AMRO BANK N.V.,
                      acting through its Chicago Branch

                            as Liquidity Provider

       _________________________________________________________________


                                 Relating to

                    US Airways Pass Through Trust 1998-1A
                 6.85% US Airways Pass Through Certificates,
                                Series 1998-1A
























                              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                                             12
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                                          13
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                                                 16
Section 3.08.  Replacement of Borrower                                  17
Section 3.09.  Funding Loss Indemnification                             17
Section 3.10.  Illegality                                               18





                                      i


                              TABLE OF CONTENTS
                                 (Continued)

                                                                       Page
                                                                       ----

                                ARTICLE IV

                           CONDITIONS PRECEDENT

Section 4.01.  Conditions Precedent to Effectiveness of Section 2.01   18
Section 4.02.  Conditions Precedent to Borrowing                       20

                                ARTICLE V

                                COVENANTS

Section 5.01.  Affirmative Covenants of the Borrower                   20
Section 5.02.  Negative Covenants of the Borrower                      21

                                ARTICLE VI

                         LIQUIDITY EVENTS OF DEFAULT

Section 6.01.  Liquidity Events of Default                             21

                                ARTICLE VII

                               MISCELLANEOUS

Section 7.01.  Amendments, Etc.                                        21
Section 7.02.  Notices, Etc.                                           21
Section 7.03.  No Waiver; Remedies                                     23
Section 7.04.  Further Assurances                                      23
Section 7.05.  Indemnification; Survival of Certain Provisions         23
Section 7.06.  Liability of the Liquidity Provider                     24
Section 7.07.  Costs, Expenses and Taxes                               24
Section 7.08.  Binding Effect; Participations                          25
Section 7.09.  Severability                                            26
Section 7.10.  GOVERNING LAW                                           26
Section 7.11.  Submission to Jurisdiction; Waiver of Jury Trial;
               Waiver of Immunity                                      27


                                     ii


                              TABLE OF CONTENTS
                                 (Continued)

                                                                      Page
                                                                      ----
Section 7.12.  Execution in Counterparts                               28
Section 7.13.  Entirety                                                28
Section 7.14.  Headings                                                28
Section 7.15.  Liquidity Provider's Obligation to Make Advances        28




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


                          REVOLVING CREDIT AGREEMENT

     This REVOLVING CREDIT AGREEMENT dated as of December 14, 1998, 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), as agent and trustee for the 
Class A Trust (as defined below) (the "Borrower"), and ABN AMRO BANK N.V., a 
bank organized under the laws of The Netherlands, acting through its Chicago 
Branch (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:

     "Additional Cost " has the meaning assigned to such term in Section 
3.01.

     "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 (x) with respect to any Unpaid Advance or 
Applied Provider Advance, 2.00%, (y) with respect to any Unapplied Non-
Extension Advance that is a LIBOR Advance, 0.45%, or (z) with respect to any 
Unapplied Downgrade

                                      1


Advance that is a LIBOR Advance, 0.45% for the first year after the date of 
such Advance and 1.00% thereafter

     "Applied Downgrade Advance" has the meaning assigned to such term in 
Section 2.06(a).

     "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 shall at all times be 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 
it, plus (b) one quarter of one percent (1/4 of 1%) 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, Chicago, Illinois, Pittsburgh, Pennsylvania, 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.

     "Certificates of Deposit" has the meaning assigned to such term in the 
Deposit Agreement.

     "Deposits" has the meaning assigned to such terms in the Deposit 
Agreement.

                                      2


     "Depositary" has the meaning assigned to such term in the Deposit 
Agreement.

     "Deposit Agreement" means the Deposit Agreement dated December 14, 1998 
between First Security Bank, National Association, as Escrow Agent and Credit 
Suisse First Boston, 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.

     "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 or of its Lending Office by the jurisdiction where 
such Liquidity Provider's principal office or such Lending Office is located, 
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 December 12, 1999, 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).

                                      3


     "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).

     "Interest Period" means, with respect to any LIBOR Advance, each of the 
following periods:

     (i)     the period beginning either (x) on the third Business Day 
following the Liquidity Provider's receipt of the Notice of Borrowing for 
such LIBOR 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 third Business Day following the Liquidity Provider's receipt of the 
Notice of Borrowing for such Final Advance (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 at Chicago, Illinois, or such other lending office as the 
Liquidity Provider from time to time shall notify the Borrower as its lending 
office hereunder; provided that the Liquidity Provider shall not change its 
Lending Office to a Lending Office outside the United States of America 
except in accordance with Section 3.01, 3.02 or 3.03 hereof.

     "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

                                      4


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 either (a) the 
Acceleration of all of the Equipment Notes (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) or 
(b) a US Airways 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) $37,656,437 
and (y) the Required Amount on such day.

     "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.

                                      5


     "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 December 
4, 1998, relating to the Class A Certificates and the Class B Certificates, 
as such Prospectus Supplement may be amended or supplemented.

     "Provider Advance" means a Downgrade Advance or a Non-Extension Advance.

     "Regulatory Change" has the meaning assigned to such term in Section 
3.01.

     "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 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.

     "Tax Letter" means the letter dated the date hereof between the 
Liquidity Provider and US Airways pertaining to this Agreement.

     "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.

                                      6


     "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", "AIFS", "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", "Fee Letter","Final Legal Distribution Date", 
"Financing Agreement", "Indenture",  "Interest Payment Date", "Investment 
Earnings", "Liquidity Facility", "Liquidity Obligations", "Loan Trustee", 
"Moody's", "Non-Extended Facility", "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", "US Airways", "US Airways Bankruptcy Event" 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

                                      7


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 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

                                      8


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) of the 
Intercreditor Agreement) 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 pm (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 pm (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.

          (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.

                                      9


     Section 2.03.  Fees.  The Borrower agrees to pay to the Liquidity 
Provider the fees set forth in the Fee Letter.

     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 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

                                     10


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 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

                                     11


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 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 6(c) or 8, as the case may be, 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

                                     12


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.  The Borrower shall pay to the Liquidity 
Provider from time to time such amounts as may be necessary to compensate the 
Liquidity Provider for any  increased costs incurred by the Liquidity 
Provider which are attributable to its making or maintaining any LIBOR 
Advances hereunder or its obligation to make any such Advances hereunder, or 
any reduction in any amount receivable by the Liquidity Provider under this 
Agreement or the Intercreditor Agreement in respect of any such Advances or 
such obligation (such increases in costs and reductions in amounts receivable 
being herein called "Additional Costs"), resulting from any change after the 
date of this Agreement in U.S. federal, state, municipal, or foreign laws or 
regulations (including Regulation D of the Board of Governors of the Federal 
Reserve System), or the adoption or making after the date of this Agreement 
of any interpretations, directives, or requirements applying to a class of 
banks including the Liquidity Provider under any U.S. federal, state, 
municipal, or any foreign laws or regulations (whether or not having the 
force of law) by any court, central bank or monetary authority charged with 
the interpretation or administration thereof (a "Regulatory Change"), which: 
(1) changes the basis of taxation of any amounts payable to the Liquidity 
Provider under this Agreement in respect of any such Advances (other than 
Excluded Taxes); or (2) imposes or modifies any reserve, special deposit, 
compulsory loan or similar requirements relating to any extensions of credit 
or other assets of, or any deposits with other liabilities of, the Liquidity 
Provider (including any such Advances or any deposits referred to in the 
definition of LIBOR Rate or related definitions).  The Liquidity Provider 
agrees to use reasonable efforts (consistent with applicable 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 that may thereafter accrue and would not, 
in the reasonable judgment of the Liquidity Provider, be otherwise 
disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.01 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.01 of the effect of any Regulatory Change on 
its costs of making or maintaining Advances or on amounts receivable by it in 
respect of Advances, and of the additional amounts required to compensate the 
Liquidity Provider in respect of any Additional Costs, shall be prima facie 
evidence of the amount owed under this Section.

                                     13


     Section 3.02.  Capital Adequacy.  If (1) the adoption, after the date 
hereof, of any applicable governmental law, rule or regulation regarding 
capital adequacy, (2) any change, after the date hereof, in the 
interpretation or administration of any such law, rule or regulation by any 
central bank or other governmental authority charged with the interpretation 
or administration thereof or (3) compliance by the Liquidity Provider or any 
corporation controlling the Liquidity Provider with any applicable guideline 
or request of general applicability, issued after the date hereof, by any 
central bank or other governmental authority (whether or not having the force 
of law) that constitutes a change of the nature described in clause (2), has 
the effect of requiring an increase in the amount of capital required to be 
maintained by the Liquidity Provider or any corporation controlling the 
Liquidity Provider, and such increase is based upon the Liquidity Provider's 
obligations hereunder and other similar obligations, the Borrower shall pay 
to the Liquidity Provider from time to time such additional amount or amounts 
as are necessary to compensate the Liquidity Provider for such portion of 
such increase as shall be reasonably allocable to the Liquidity Provider's 
obligations to the Borrower hereunder.  The Liquidity Provider agrees to use 
reasonable efforts (consistent with applicable 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 that may thereafter accrue and would not, in the 
reasonable judgment of the Liquidity Provider, be otherwise materially 
disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.02 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.02 of the effect of any increase in the amount 
of capital required to be maintained by the Liquidity Provider and of the 
amount allocable to the Liquidity Provider's obligations to the Borrower 
hereunder shall be prima facie evidence of the amounts owed under this 
Section.

     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) 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

                                     14



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 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 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 ABN AMRO Bank, 
New York, N.Y., ABA #026009580, Account Name: ABN AMRO Bank, Chicago Branch 
CPU, Account No. [650-001-1789-41] , Account Name: US Airways Liquidity 
Facility 1998-1A.

     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

                                     15


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 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 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 or an Unapplied 
Provider 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 or Unapplied Provider Advance as a Base Rate Advance by not 
requesting a conversion of the Final Advance of Unapplied Provider Advance 
(as the case may be) 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

                                     16


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)  [Reserved]

     (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 2.00% until paid.

     (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 
by reason of the liquidation or redeployment of deposits or other funds 
acquired by the Liquidity Provider to fund or maintain any LIBOR Advance (but 
excluding loss of anticipated profits) incurred as a result of:

                                     17


     (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:

     (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);

                                     18


            (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) An agreement from US Airways, pursuant to which (i) US 
Airways 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 US Airways 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 (ii) US Airways agrees to allow the Liquidity Provider to 
inspect US Airways' books and records regarding such transactions, and to 
discuss such transactions with officers and employees of US Airways; and

            (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.

                                     19


     (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 and Class B Certificates by the Underwriters under the 
Underwriting Agreement and the purchase of the Class C Certificates by AIFS 
under the Class C Purchase 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 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

                                     20


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.

                                 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.

                                     21


     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, MA  02110

                          Attention:  Corporate Trust Department
                          Telephone:  (617) 664-5340
                          Telecopy:   (617) 664-5151

     Liquidity Provider:  ABN AMRO BANK N.V.
                          Aerospace Department
                          135 South LaSalle Street, #660
                          Chicago, IL 60674-9135

                          Attention:  Claudia Heldring
                          Telephone:  (312) 904-2900
                          Telecopy:  (312) 606-8428

                          with a copy to:

                          ABN AMRO Bank N.V.
                          135 South LaSalle Street, #625
                          Chicago, IL 60674-9135

                          Attention:  Loan Administration
                          Telephone:  (312) 904-2961
                          Telecopy:  (312) 904-1288

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 delivered to each of the parties to the 
Participation Agreements at their respective addresses set forth therein.

                                     22


     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 6(c) or 8, as the case may be, 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 or in the Fee Letter (regardless of whether indemnified 
against pursuant to said Sections or in such Fee Letter)), 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 Fee Letter, 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, the Fee Letter, the Tax Letter or any other 
Operative Agreement to which it is a party.  The indemnities contained in 
Section 6(c) or 8, as the case may be, of the Participation Agreements, and 
the provisions of Sections 3.01, 3.02, 3.03, 3.09, 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

                                     23


documents which do not 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

                                     24


otherwise provided in this Section 7.08) nor (except as contemplated by 
Section 3.08) the Borrower shall have the 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, 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


                                     25


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.

     (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

                                      26


     (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)  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.

     (c)  The Liquidity Provider hereby waives any immunity it may have from 
the jurisdiction of the courts of the United States or of any State and 
waives any immunity any of its properties located in the United States may 
have from attachment or execution upon a judgment entered by any such court 
under the United States Foreign Sovereign Immunities Act of 1976 or any 
similar successor legislation.

     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

                                     27


UNCONDITIONAL AND IRREVOCABLE, AND SHALL BE PAID OR PERFORMED, IN EACH CASE 
STRICTLY IN ACCORDANCE WITH THE TERMS OF THIS AGREEMENT.












                                     28


     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 agent and trustee
                                 for the Class A Trust, as Borrower


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


                            ABN AMRO BANK, N.V., acting through its Chicago
                                   Branch, as Liquidity Provider


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



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












                                     29


                                                                   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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1A) dated 
as of December 14, 1998, 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 Class A 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.

                                     I-1


     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 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 Certificate 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


             SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Interest Advance Notice of 
Borrowing]















                                     I-3


                                                                  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 ABN AMRO BANK N.V. 
(the "Liquidity Provider"), with reference to the Revolving Credit Agreement 
(1998-1A) dated as of December 14, 1998, 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.

     (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]*.

* Bracketed language may be included at Borrower's option.

                                     II-1


     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 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


           SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Non-Extension Advance Notice 
of Borrowing]





                                    II-3


                                                                 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 ABN AMRO BANK N.V. 
(the "Liquidity Provider"), with reference to the Revolving Credit Agreement 
(1998-1A) dated as of December 14, 1998, 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.

                                     III-1


     (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]*.

     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 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:










* Bracketed language may be included at Borrower's option.

                                   III-2


               SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Downgrade Advance Notice of 
Borrowing]
















                                   III-3


                                                                  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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1A) dated 
as of December 14, 1998, 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


     (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]*.

     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:











* Bracketed language may be included at Borrower's option.

                                   IV-2


                SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Final Advance Notice of 
Borrowing]













                                   IV-3


                                                                   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 dated as of December 14, 1998, between State
     Street Bank and Trust Company, as Subordination Agent, as agent and
     trustee for the US Airways Pass Through Trust, 1998-1A, as Borrower, and
     ABN AMRO BANK, N.V.  (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


     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,

                                           ABN AMRO BANK, N.V.,
                                            Chicago Branch
                                            as Liquidity Provider

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

cc:  State Street Bank and Trust Company,
     as Class A Trustee











                                     V-2


                                                                  Annex VI to
                                                   Revolving Credit Agreement

                  NOTICE OF REPLACEMENT SUBORDINATION AGENT



[Date]
Attention:



     Revolving Credit Agreement dated as of December 14, 1998, between State
     Street Bank and Trust Company, as Subordination Agent, as agent and
     trustee for the US Airways Pass Through Trust, 1998-1A, as Borrower, and
     ABN AMRO BANK N.V. (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


     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:


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









                                    VI-2





EXHIBIT 4(a)(vii)








      -----------------------------------------------------------------

                          REVOLVING CREDIT AGREEMENT
                                  (1998-1B)


                         Dated as of December 14, 1998

                                    between

                     STATE STREET BANK and TRUST COMPANY,

                           as Subordination Agent,
                         as agent and trustee for the
                    US Airways Pass Through Trust 1998-1B

                                 as Borrower

                                     and

                              ABN AMRO BANK N.V.,
                      acting through its Chicago Branch

                            as Liquidity Provider



      -----------------------------------------------------------------



                                 Relating to

                    US Airways Pass Through Trust 1998-1B
                  7.35% US Airways Pass Through Certificates,
                                Series 1998-1B














                            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                                         8
Section 2.03.  Fees                                                       10
Section 2.04.  Reduction or Termination of the Maximum Commitment         10
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                                               12
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                                            13
Section 3.02.  Capital Adequacy                                           14
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                                                   16
Section 3.08.  Replacement of Borrower                                    17
Section 3.09.  Funding Loss Indemnification                               17
Section 3.10.  Illegality                                                 18




                                   i


                          TABLE OF CONTENTS
                             (Continued)
                                                                        Page
                                                                        ----

                                ARTICLE IV

                           CONDITIONS PRECEDENT

Section 4.01.  Conditions Precedent to Effectiveness of Section 2.01      18
Section 4.02.  Conditions Precedent to Borrowing                          20

                                ARTICLE V

                                COVENANTS

Section 5.01.  Affirmative Covenants of the Borrower                      20
Section 5.02.  Negative Covenants of the Borrower                         21

                                ARTICLE VI

                      LIQUIDITY EVENTS OF DEFAULT

Section 6.01.  Liquidity Events of Default                                21

                                ARTICLE VII

                               MISCELLANEOUS

Section 7.01.  Amendments, Etc.                                           21
Section 7.02.  Notices, Etc.                                              22
Section 7.03.  No Waiver; Remedies                                        23
Section 7.04.  Further Assurances                                         23
Section 7.05.  Indemnification; Survival of Certain Provisions            23
Section 7.06.  Liability of the Liquidity Provider                        24
Section 7.07.  Costs, Expenses and Taxes                                  24
Section 7.08.  Binding Effect; Participations                             25
Section 7.09.  Severability                                               26
Section 7.10.  GOVERNING LAW                                              26
Section 7.11.  Submission to Jurisdiction; Waiver of Jury Trial; Waiver 
                 of Immunity                                              26
Section 7.12.  Execution in Counterparts                                  27
Section 7.13.  Entirety                                                   28
Section 7.14.  Headings                                                   28
Section 7.15.  LIQUIDITY PROVIDER'S OBLIGATION TO MAKE ADVANCES           28

                                     ii


                             TABLE OF CONTENTS
                                (Continued)
                                                                        Page
                                                                        ----

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


                      REVOLVING CREDIT AGREEMENT

     This REVOLVING CREDIT AGREEMENT dated as of December 14, 1998, 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), as agent and trustee for the 
Class B Trust (as defined below) (the "Borrower"), and ABN AMRO BANK N.V., 
a bank organized under the laws of The Netherlands, acting through its 
Chicago Branch (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:

          "Additional Cost" has the meaning assigned to such term in 
Section 3.01.

          "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 (x) with respect to any Unpaid Advance 
or Applied Provider Advance, 2.00%, (y) with respect to any Unapplied Non-
Extension Advance that is a LIBOR Advance, 0.45%, or (z) with respect to any 
Unapplied Downgrade

                                   1


Advance that is a LIBOR Advance, 0.45% for the first year after the date of 
such Advance and 0.75% thereafter

          "Applied Downgrade Advance" has the meaning assigned to such term 
in Section 2.06(a).

          "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 shall at all times be 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 it, plus (b) one quarter of one percent (1/4 of 1%) 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, Chicago, Illinois, Pittsburgh, Pennsylvania, 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.

          "Certificates of Deposit" has the meaning assigned to such term 
in the Deposit Agreement.

          "Deposits" has the meaning assigned to such terms in the Deposit 
Agreement.

                                   2


          "Depositary" has the meaning assigned to such term in the Deposit 
Agreement.

          "Deposit Agreement" means the Deposit Agreement dated December 
14, 1998 between First Security Bank, National Association, as Escrow Agent 
and Credit Suisse First Boston, 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.

          "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 or of its Lending Office by the jurisdiction 
where such Liquidity Provider's principal office or such Lending Office is 
located, 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 December 12, 1999, 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).

                                   3


          "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).

          "Interest Period" means, with respect to any LIBOR Advance, each 
of the following periods:

          (i)   the period beginning either (x) on the third Business Day 
following the Liquidity Provider's receipt of the Notice of Borrowing for 
such LIBOR 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 third Business Day following the Liquidity Provider's receipt of the 
Notice of Borrowing for such Final Advance (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 at Chicago, Illinois, or such other lending office 
as the Liquidity Provider from time to time shall notify the Borrower as its 
lending office hereunder; provided that the Liquidity Provider shall not 
change its Lending Office to a Lending Office outside the United States of 
America except in accordance with Section 3.01, 3.02 or 3.03 hereof.

          "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

                                   4


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 either (a) 
the Acceleration of all of the Equipment Notes (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) or 
(b) a US Airways 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) 
$8,961,341 and (y) the Required Amount on such day.

          "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.

                                   5


          "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 
December 4, 1998, relating to the Class A Certificates and the Class B 
Certificates, as such Prospectus Supplement may be amended or supplemented.

          "Provider Advance" means a Downgrade Advance or a Non-Extension 
Advance.

          "Regulatory Change" has the meaning assigned to such term in 
Section 3.01.

          "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 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.

          "Tax Letter" means the letter dated the date hereof between the 
Liquidity Provider and US Airways pertaining to this Agreement.

          "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.

                                   6


          "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", "AIFS", "Certificates", "Class A Certificates", 
"Class B Cash Collateral Account","Class B Certificates", "Class B 
Certificateholders", "Class B Trust", "Class B Trust Agreement", "Class 
B Trustee", "Class C Certificates", "Class C Purchase Agreement", 
"Closing Date", "Controlling Party", "Corporate Trust Office", 
"Delivery Period Expiry Date", "Distribution Date", "Downgraded 
Facility", "Equipment Notes", "Fee Letter","Final Legal Distribution 
Date", "Financing Agreement", "Indenture",  "Interest Payment Date", 
"Investment Earnings", "Liquidity Facility", "Liquidity Obligations", 
"Loan Trustee", "Moody's", "Non-Extended Facility", "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", "US Airways", "US Airways 
Bankruptcy Event" 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

                                   7


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 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

                                   8


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) of the 
Intercreditor Agreement) 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 pm (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 pm (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.

     (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.

                                   9


     Section 2.03.  Fees.  The Borrower agrees to pay to the Liquidity 
Provider the fees set forth in the Fee Letter.

     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 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

                                   10


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 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

                                   11


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 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 6(c) or 8, as the case may be, 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

                                   12


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.  The Borrower shall pay to the Liquidity 
Provider from time to time such amounts as may be necessary to compensate the 
Liquidity Provider for any  increased costs incurred by the Liquidity 
Provider which are attributable to its making or maintaining any LIBOR 
Advances hereunder or its obligation to make any such Advances hereunder, or 
any reduction in any amount receivable by the Liquidity Provider under this 
Agreement or the Intercreditor Agreement in respect of any such Advances or 
such obligation (such increases in costs and reductions in amounts receivable 
being herein called "Additional Costs"), resulting from any change after 
the date of this Agreement in U.S. federal, state, municipal, or foreign laws 
or regulations (including Regulation D of the Board of Governors of the 
Federal Reserve System), or the adoption or making after the date of this 
Agreement of any interpretations, directives, or requirements applying to a 
class of banks including the Liquidity Provider under any U.S. federal, 
state, municipal, or any foreign laws or regulations (whether or not having 
the force of law) by any court, central bank or monetary authority charged 
with the interpretation or administration thereof (a "Regulatory Change"), 
which: (1) changes the basis of taxation of any amounts payable to the 
Liquidity Provider under this Agreement in respect of any such Advances 
(other than Excluded Taxes); or (2) imposes or modifies any reserve, special 
deposit, compulsory loan or similar requirements relating to any extensions 
of credit or other assets of, or any deposits with other liabilities of, the 
Liquidity Provider (including any such Advances or any deposits referred to 
in the definition of LIBOR Rate or related definitions).  The Liquidity 
Provider agrees to use reasonable efforts (consistent with applicable 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 that may thereafter accrue and would not, 
in the reasonable judgment of the Liquidity Provider, be otherwise 
disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.01 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.01 of the effect of any Regulatory Change on 
its costs of making or maintaining Advances or on amounts receivable by it in 
respect of Advances, and of the additional amounts required to compensate the 
Liquidity Provider in respect of any Additional Costs, shall be prima facie 
evidence of the amount owed under this Section.

                                   13


     Section 3.02.  Capital Adequacy.  If (1) the adoption, after the date 
hereof, of any applicable governmental law, rule or regulation regarding 
capital adequacy, (2) any change, after the date hereof, in the 
interpretation or administration of any such law, rule or regulation by any 
central bank or other governmental authority charged with the interpretation 
or administration thereof or (3) compliance by the Liquidity Provider or any 
corporation controlling the Liquidity Provider with any applicable guideline 
or request of general applicability, issued after the date hereof, by any 
central bank or other governmental authority (whether or not having the force 
of law) that constitutes a change of the nature described in clause (2), has 
the effect of requiring an increase in the amount of capital required to be 
maintained by the Liquidity Provider or any corporation controlling the 
Liquidity Provider, and such increase is based upon the Liquidity Provider's 
obligations hereunder and other similar obligations, the Borrower shall pay 
to the Liquidity Provider from time to time such additional amount or amounts 
as are necessary to compensate the Liquidity Provider for such portion of 
such increase as shall be reasonably allocable to the Liquidity Provider's 
obligations to the Borrower hereunder.  The Liquidity Provider agrees to use 
reasonable efforts (consistent with applicable 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 that may thereafter accrue and would not, in the 
reasonable judgment of the Liquidity Provider, be otherwise materially 
disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.02 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.02 of the effect of any increase in the amount 
of capital required to be maintained by the Liquidity Provider and of the 
amount allocable to the Liquidity Provider's obligations to the Borrower 
hereunder shall be prima facie evidence of the amounts owed under this 
Section.

     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) 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

                                   14


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 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 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 ABN AMRO Bank, 
New York, N.Y., ABA #026009580, Account Name: ABN AMRO Bank, Chicago Branch 
CPU, Account No. [650-001-1789-41] , Account Name: US Airways Liquidity 
Facility 1998-1A.

     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

                                   15


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 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 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 or an Unapplied 
Provider 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 or Unapplied Provider Advance as a Base Rate Advance by not 
requesting a conversion of the Final Advance of Unapplied Provider Advance 
(as the case may be) 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

                                   16


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)  [Reserved]

     (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 2.00% until paid.

     (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 
by reason of the liquidation or redeployment of deposits or other funds 
acquired by the Liquidity Provider to fund or maintain any LIBOR Advance (but 
excluding loss of anticipated profits) incurred as a result of:

                                   17


     (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:

     (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);

                                   18


          (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)   An agreement from US Airways, pursuant to which (i) US 
Airways 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 US Airways 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 (ii) US Airways agrees to allow the Liquidity Provider to 
inspect US Airways' books and records regarding such transactions, and to 
discuss such transactions with officers and employees of US Airways; and

          (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.

                                   19


     (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 and Class B Certificates by the Underwriters under the 
Underwriting Agreement and the purchase of the Class C Certificates by AIFS 
under the Class C Purchase 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 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

                                     20


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.


                                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

                                   21

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, MA  02110

                          Attention:  Corporate Trust Department
                          Telephone:  (617) 664-5340
                          Telecopy:   (617) 664-5151

    Liquidity Provider:   ABN AMRO BANK N.V.
                          Aerospace Department
                          135 South LaSalle Street, #660
                          Chicago, IL 60674-9135

                          Attention:  Claudia Heldring
                          Telephone:  (312) 904-2900
                          Telecopy:  (312) 606-8428

                          with a copy to:

                          ABN AMRO Bank N.V.
                          135 South LaSalle Street, #625
                          Chicago, IL 60674-9135




                                     22


                          Attention:  Loan Administration
                          Telephone:  (312) 904-2961
                          Telecopy:  (312) 904-1288


























                                     23


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 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 6(c) or 8, as the case may be, 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 or in the Fee Letter (regardless of whether indemnified 
against pursuant to said Sections or in such Fee Letter)), 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 Fee Letter, 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, the Fee Letter, the Tax Letter or any other 
Operative Agreement to which it is a party.  The indemnities contained in 
Section 6(c) or 8, as the case may be, of the Participation

                                   24


Agreements, and the provisions of Sections 3.01, 3.02, 3.03, 3.09, 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 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

                                   25


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 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, 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

                                     26


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.

     (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;

                                     27


     (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.

     (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.

     (c)  The Liquidity Provider hereby waives any immunity it may have from 
the jurisdiction of the courts of the United States or of any State and 
waives any immunity any of its properties located in the United States may 
have from attachment or execution upon a judgment entered by any such court 
under the United States Foreign Sovereign Immunities Act of 1976 or any 
similar successor legislation.

     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

                                     28


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.


















                                   29


     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 agent and trustee
                              for the Class B Trust, as Borrower


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


                         ABN AMRO BANK, N.V., acting through its Chicago
                              Branch, as Liquidity Provider


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



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











                                     30



                                                                   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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1B) dated 
as of December 14, 1998, 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 Class B 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.

                                   I-1


     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 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 Certificate 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


            SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Interest Advance Notice of 
Borrowing]
















                                   I-3


                                                                  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 ABN AMRO BANK 
N.V. (the "Liquidity Provider"), with reference to the Revolving Credit 
Agreement (1998-1B) dated as of December 14, 1998, 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.

     (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]*.

* Bracketed language may be included at Borrower's option.


                                   II-1


     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 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


          SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Non-Extension Advance Notice 
of Borrowing]















                                   II-3


                                                                 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 ABN AMRO BANK 
N.V. (the "Liquidity Provider"), with reference to the Revolving Credit 
Agreement (1998-1B) dated as of December 14, 1998, 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.

                                   III-1


     (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]*.

     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 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:

- -------------------------------
* Bracketed language may be included at Borrower's option.

                                   III-2


        SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Downgrade Advance Notice of 
Borrowing]



















                                   III-3


                                                                  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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1B) dated 
as of December 14, 1998, 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

     (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]*.

     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:







* Bracketed language may be included at Borrower's option.

                                   IV-2


           SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Final Advance Notice of 
Borrowing]


















                                   IV-3


                                                                   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 dated as of December 14, 1998, between State 
Street Bank and Trust Company, as Subordination Agent, as agent and trustee 
for the US Airways Pass Through Trust, 1998-1B, as Borrower, and ABN AMRO 
BANK, N.V.  (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


     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,

                                   ABN AMRO BANK, N.V.,
                                     Chicago Branch
                                      as Liquidity Provider

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

cc:  State Street Bank and Trust Company,
       as Class B Trustee















                                   V-2

                                                                  Annex VI to
                                                   Revolving Credit Agreement

                NOTICE OF REPLACEMENT SUBORDINATION AGENT



[Date]
Attention:



     Revolving Credit Agreement dated as of December 14, 1998, between State 
Street Bank and Trust Company, as Subordination Agent, as agent and trustee 
for the US Airways Pass Through Trust, 1998-1B, as Borrower, and ABN AMRO 
BANK N.V. (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


     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:


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


















                                   VI-2






EXHIBIT 4(a)(viii)








- -----------------------------------------------------------------------------

                           REVOLVING CREDIT AGREEMENT
                                    (1998-1C)


                          Dated as of December 14, 1998

                                    between

                       STATE STREET BANK and TRUST COMPANY,

                            as Subordination Agent,
                         as agent and trustee for the
                     US Airways Pass Through Trust 1998-1C

                                  as Borrower

                                      and

                              ABN AMRO BANK N.V., 
                       acting through its Chicago B ranch

                            as Liquidity Provider

- -----------------------------------------------------------------------------


                                  Relating to

                     US Airways Pass Through Trust 1998-1C
                   6.82% US Airways Pass Through Certificates,
                                 Series 1998-1C























                             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                                         8
Section 2.03.  Fees                                                        9
Section 2.04.  Reduction or Termination of the Maximum Commitment         10
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                                               12
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                                            13
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                                                   16
Section 3.08.  Replacement of Borrower                                    17
Section 3.09.  Funding Loss Indemnification                               17
Section 3.10.  Illegality                                                 18

                                   i


                             TABLE OF CONTENTS
                               (Continued)

                                                                        Page
                                                                        ----



                                 ARTICLE IV

                             CONDITIONS PRECEDENT

Section 4.01.  Conditions Precedent to Effectiveness of Section 2.01      18
Section 4.02.  Conditions Precedent to Borrowing                          20

                                 ARTICLE V

                                 COVENANTS

Section 5.01.  Affirmative Covenants of the Borrower                      20
Section 5.02.  Negative Covenants of the Borrower                         21

                                 ARTICLE VI

                         LIQUIDITY EVENTS OF DEFAULT 

Section 6.01.  Liquidity Events of Default                                21

                                 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                                         23
Section 7.05.  Indemnification; Survival of Certain Provisions            23
Section 7.06.  Liability of the Liquidity Provider                        23
Section 7.07.  Costs, Expenses and Taxes                                  24
Section 7.08.  Binding Effect; Participations                             24
Section 7.09.  Severability                                               26
Section 7.10.  GOVERNING LAW                                              26
Section 7.11.  Submission to Jurisdiction; Waiver of Jury Trial; Waiver of   
               Immunity                                                   26
Section 7.12.  Execution in Counterparts                                  27
Section 7.13.  Entirety                                                   27

                                   ii


                             TABLE OF CONTENTS
                               (Continued)

                                                                        Page
                                                                        ----

Section 7.14.  Headings                                                   27
Section 7.15.  Liquidity Provider's Obligation to Make Advances           27



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


                             REVOLVING CREDIT AGREEMENT

     This REVOLVING CREDIT AGREEMENT dated as of December 14, 1998, 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), as agent and trustee for the 
Class C Trust (as defined below) (the "Borrower"), and ABN AMRO BANK N.V., 
a bank organized under the laws of The Netherlands, acting through its 
Chicago Branch (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:

     "Additional Cost" has the meaning assigned to such term in Section 
3.01.

     "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 (x) with respect to any Unpaid Advance or 
Applied Provider Advance, 2.00%, (y) with respect to any Unapplied Non-
Extension Advance that is a LIBOR Advance, 0.45%, or (z) with respect to any 
Unapplied Downgrade 




Advance that is a LIBOR Advance, 0.45% for the first year after the date of 
such Advance and 0.75% thereafter

     "Applied Downgrade Advance" has the meaning assigned to such term in 
Section 2.06(a).

     "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 shall at all times be 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 
it, plus (b) one quarter of one percent (1/4 of 1%) 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, Chicago, Illinois, Pittsburgh, Pennsylvania, 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.

     "Certificates of Deposit" has the meaning assigned to such term in the 
Deposit Agreement.

     "Deposits" has the meaning assigned to such terms in the Deposit 
Agreement.

                                   2


     "Depositary" has the meaning assigned to such term in the Deposit 
Agreement.

     "Deposit Agreement" means the Deposit Agreement dated December 14, 
1998 between First Security Bank, National Association, as Escrow Agent and 
Citibank, N.A. 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.

     "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 or of its Lending Office by the jurisdiction where 
such Liquidity Provider's principal office or such Lending Office is located, 
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 December 12, 1999, 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).

                                   3


     "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).

     "Interest Period" means, with respect to any LIBOR Advance, each of 
the following periods:

     (i)    the period beginning either (x) on the third Business Day 
following the Liquidity Provider's receipt of the Notice of Borrowing for 
such LIBOR 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 third Business Day following the Liquidity Provider's receipt of the 
Notice of Borrowing for such Final Advance (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 at Chicago, Illinois, or such other lending office as the 
Liquidity Provider from time to time shall notify the Borrower as its lending 
office hereunder; provided that the Liquidity Provider shall not change its 
Lending Office to a Lending Office outside the United States of America 
except in accordance with Section 3.01, 3.02 or 3.03 hereof.

     "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

                                   4


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 either (a) the 
Acceleration of all of the Equipment Notes (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) or 
(b) a US Airways 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) 
$14,461,742, and (y) the Required Amount on such day.

     "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.

                                   5


     "Offering Memorandum" means the Offering Memorandum dated December   , 
                                                                          --
1998 relating to the Class C Certificates, as such Offering Memorandum may be 
amended or supplemented.

     "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.

     "Provider Advance" means a Downgrade Advance or a Non-Extension 
Advance.

     "Regulatory Change" has the meaning assigned to such term in Section 
3.01.

     "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 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.

     "Tax Letter" means the letter dated the date hereof between the 
Liquidity Provider and US Airways pertaining to this Agreement.

     "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.

                                   6


     "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", "AIFS", "Certificates", "Class A Certificates", 
     "Class B Certificates", "Class C Cash Collateral Account", "Class C 
     Certificates", "Class C Certificateholders", "Class C Purchase 
     Agreement", "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", "Fee Letter","Final 
     Legal Distribution Date", "Financing Agreement", "Indenture",  
     "Interest Payment Date", "Investment Earnings", "Liquidity 
     Facility", "Liquidity Obligations", "Loan Trustee", "Moody's", 
     "Non-Extended Facility", "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", "US Airways", "US Airways Bankruptcy Event" 
     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.

                                   7


     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 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

                                   8


be used to fund the Class C Cash Collateral Account (in accordance with 
Section 3.6(i) of the Intercreditor Agreement) 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 pm (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 pm (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.

     (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.  The Borrower agrees to pay to the Liquidity 
Provider the fees set forth in the Fee Letter.

                                   9


     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 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

                                   10


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 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

                                   11


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 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 6(c) or 8, as the case may be, 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.

                                   12


                                 ARTICLE III

                          OBLIGATIONS OF THE BORROWER

     Section 3.01.  Increased Costs.  The Borrower shall pay to the Liquidity 
Provider from time to time such amounts as may be necessary to compensate the 
Liquidity Provider for any  increased costs incurred by the Liquidity 
Provider which are attributable to its making or maintaining any LIBOR 
Advances hereunder or its obligation to make any such Advances hereunder, or 
any reduction in any amount receivable by the Liquidity Provider under this 
Agreement or the Intercreditor Agreement in respect of any such Advances or 
such obligation (such increases in costs and reductions in amounts receivable 
being herein called "Additional Costs"), resulting from any change after 
the date of this Agreement in U.S. federal, state, municipal, or foreign laws 
or regulations (including Regulation D of the Board of Governors of the 
Federal Reserve System), or the adoption or making after the date of this 
Agreement of any interpretations, directives, or requirements applying to a 
class of banks including the Liquidity Provider under any U.S. federal, 
state, municipal, or any foreign laws or regulations (whether or not having 
the force of law) by any court, central bank or monetary authority charged 
with the interpretation or administration thereof (a "Regulatory Change"), 
which: (1) changes the basis of taxation of any amounts payable to the 
Liquidity Provider under this Agreement in respect of any such Advances 
(other than Excluded Taxes); or (2) imposes or modifies any reserve, special 
deposit, compulsory loan or similar requirements relating to any extensions 
of credit or other assets of, or any deposits with other liabilities of, the 
Liquidity Provider (including any such Advances or any deposits referred to 
in the definition of LIBOR Rate or related definitions).  The Liquidity 
Provider agrees to use reasonable efforts (consistent with applicable 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 that may thereafter accrue and would not, 
in the reasonable judgment of the Liquidity Provider, be otherwise 
disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.01 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.01 of the effect of any Regulatory Change on 
its costs of making or maintaining Advances or on amounts receivable by it in 
respect of Advances, and of the additional amounts required to compensate the 
Liquidity Provider in respect of any Additional Costs, shall be prima facie 
evidence of the amount owed under this Section.

     Section 3.02.  Capital Adequacy.  If (1) the adoption, after the date 
hereof, of any applicable governmental law, rule or regulation regarding 
capital adequacy, (2) any change, after the date hereof, in the 
interpretation or administration of any such law, rule or 

                                   13


regulation by any central bank or other governmental authority charged with 
the interpretation or administration thereof or (3) compliance by the 
Liquidity Provider or any corporation controlling the Liquidity Provider with 
any applicable guideline or request of general applicability, issued after 
the date hereof, by any central bank or other governmental authority (whether 
or not having the force of law) that constitutes a change of the nature 
described in clause (2), has the effect of requiring an increase in the 
amount of capital required to be maintained by the Liquidity Provider or any 
corporation controlling the Liquidity Provider, and such increase is based 
upon the Liquidity Provider's obligations hereunder and other similar 
obligations, the Borrower shall pay to the Liquidity Provider from time to 
time such additional amount or amounts as are necessary to compensate the 
Liquidity Provider for such portion of such increase as shall be reasonably 
allocable to the Liquidity Provider's obligations to the Borrower hereunder. 
The Liquidity Provider agrees to use reasonable efforts (consistent with 
applicable 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 that may thereafter 
accrue and would not, in the reasonable judgment of the Liquidity Provider, 
be otherwise materially disadvantageous to the Liquidity Provider.

     The Liquidity Provider will notify the Borrower of any event occurring 
after the date of this Agreement that will entitle the Liquidity Provider to 
compensation pursuant to this Section 3.02 as promptly as practicable after 
it obtains knowledge thereof and determines to request such compensation, 
which notice shall describe in reasonable detail the calculation of the 
amounts owed under this Section.  Determinations by the Liquidity Provider 
for purposes of this Section 3.02 of the effect of any increase in the amount 
of capital required to be maintained by the Liquidity Provider and of the 
amount allocable to the Liquidity Provider's obligations to the Borrower 
hereunder shall be prima facie evidence of the amounts owed under this 
Section.

     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) 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 

                                   14


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 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 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 ABN AMRO Bank, 
New York, N.Y., ABA #026009580, Account Name: ABN AMRO Bank, Chicago Branch 
CPU, Account No. [650-001-1789-41], Account Name: US Airways Liquidity 
Facility 1998-1A.

     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

                                   15


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 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 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 Unapplied 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 or an Unapplied 
Provider 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 or an Unapplied Provider Advance as a Base Rate Advance by 
not requesting a conversion of the Final Advance or Unapplied Provider 
Advance (as the case may be) 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).

                                   16


     (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)  [Reserved].

     (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 2.00% until paid.

     (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 
by reason of the liquidation or redeployment of deposits or other funds 
acquired by the Liquidity Provider to fund or maintain any LIBOR Advance (but 
excluding loss of anticipated profits) 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

                                   17


     (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:

     (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 Offering Memorandum and specimen copies of the 
Class C Certificates;

                                   18


          (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 applicable to the Class C Certificates (in the case of each such 
opinion, 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)  An agreement from US Airways, pursuant to which (i) US 
Airways 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 US Airways 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 (ii) US Airways agrees to allow the Liquidity Provider to 
inspect US Airways' books and records regarding such transactions, and to 
discuss such transactions with officers and employees of US Airways; and

          (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.

                                   19


     (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 and Class B Certificates by the Underwriters under the 
Underwriting Agreement and the purchase of the Class C Certificates by AIFS 
under the Class C Purchase Agreement shall have been satisfied (unless any of 
such conditions precedent shall have been waived by the Underwriters or AIFS, 
as the case may be).

     (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 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.

                                   20


     (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.

                                 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):

                                   21


            Borrower:     STATE STREET BANK AND TRUST COMPANY
                          Two International Place
                          4th Floor
                          Boston, MA  02110

                          Attention:  Corporate Trust Department
                          Telephone:  (617) 664-5340
                          Telecopy:   (617) 664-5151

  Liquidity Provider:     ABN AMRO BANK N.V.
                          Aerospace Department
                          135 South LaSalle Street, #660
                          Chicago, IL 60674-9135

                          Attention:  Claudia Heldring
                          Telephone:  (312) 904-2900
                          Telecopy:  (312) 606-8428

                          with a copy to:

                          ABN AMRO Bank N.V.
                          135 South LaSalle Street, #625
                          Chicago, IL 60674-9135

                          Attention:  Loan Administration
                          Telephone:  (312) 904-2961
                          Telecopy:  (312) 904-1288

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 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.

                                   22


     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 6(c) or 8, as the case may be, 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 or in the Fee Letter (regardless of whether indemnified 
against pursuant to said Sections or in such Fee Letter)), 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 Fee Letter, 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, the Fee Letter, the Tax Letter or any other 
Operative Agreement to which it is a party.  The indemnities contained in 
Section 6(c) or 8, as the case may be, of the Participation Agreements, and 
the provisions of Sections 3.01, 3.02, 3.03, 3.09, 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 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 

                                   23


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 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 

                                   24


Persons as the Liquidity Provider may in its sole discretion select, 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.

     (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 

                                   25


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.

                                   26


     (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.

     (c)  The Liquidity Provider hereby waives any immunity it may have from 
the jurisdiction of the courts of the United States or of any State and 
waives any immunity any of its properties located in the United States may 
have from attachment or execution upon a judgment entered by any such court 
under the United States Foreign Sovereign Immunities Act of 1976 or any 
similar successor legislation.

     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.

                                   27


     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 agent and trustee
                                for the Class C Trust, as Borrower


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


                             ABN AMRO BANK, N.V., acting through its Chicago 
                                Branch, as Liquidity Provider


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



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


















                                   28


                                                                   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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1C) dated 
as of December 14, 1998, 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 Class C 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.

                                   I-1


     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 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 Certificate 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


           SCHEDULE I TO INTEREST ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Interest Advance Notice of 
Borrowing]


















                                   I-3


                                                                  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 ABN AMRO BANK 
N.V. (the "Liquidity Provider"), with reference to the Revolving Credit 
Agreement (1998-1C) dated as of December 14, 1998, 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.

     (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]*.



* Bracketed language may be included at Borrower's option.

                                   II-1


     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 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


         SCHEDULE I TO NON-EXTENSION ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Non-Extension Advance Notice 
of Borrowing]

















                                   II-3


                                                                 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 ABN AMRO BANK 
N.V. (the "Liquidity Provider"), with reference to the Revolving Credit 
Agreement (1998-1C) dated as of December 14, 1998, 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.



                                   III-1


     (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]*.

     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 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:

















* Bracketed language may be included at Borrower's option.


                                   III-2


         SCHEDULE I TO DOWNGRADE ADVANCE NOTICE OF BORROWING

[Insert Copy of computations in accordance with Downgrade Advance Notice of 
Borrowing]



















                                   III-3


                                                                  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 ABN AMRO BANK N.V. (the "Liquidity 
Provider"), with reference to the Revolving Credit Agreement (1998-1C) dated 
as of December 14, 1998, 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


     (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]*.

     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:












* Bracketed language may be included at Borrower's option.


                                   IV-2


            SCHEDULE I TO FINAL ADVANCE NOTICE OF BORROWING

[Insert Copy of Computations in accordance with Final Advance Notice of 
Borrowing]





















                                   IV-3


                                                                   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 dated as of December 14, 1998, between State 
     Street Bank and Trust Company, as Subordination Agent, as agent and 
     trustee for the US Airways Pass Through Trust, 1998-1C, as Borrower, and 
     ABN AMRO BANK, N.V.  (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


     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,

                                      ABN AMRO BANK, N.V.,
                                        Chicago Branch
                                         as Liquidity Provider

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

cc:  State Street Bank and Trust Company,
       as Class C Trustee

















                                   V-2


                                                                  Annex VI to
                                                   Revolving Credit Agreement

                 NOTICE OF REPLACEMENT SUBORDINATION AGENT



[Date]
Attention:



     Revolving Credit Agreement dated as of December 14, 1998, between State 
     Street Bank and Trust Company, as Subordination Agent, as agent and 
     trustee for the US Airways Pass Through Trust, 1998-1C, as Borrower, and 
     ABN AMRO BANK N.V. (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


     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:


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











                                   VI-2




EXHIBIT 4(a)(ix)


- -----------------------------------------------------------------------------


                           INTERCREDITOR AGREEMENT

                                 Dated as of
                              December 14, 1998

                                    AMONG

                      STATE STREET BANK AND TRUST COMPANY
                        not in its individual capacity
                        but solely as Trustee under the
                     US Airways Pass Through Trust 1998-1A,
                     US Airways Pass Through Trust 1998-1B
                                     and
                     US Airways Pass Through Trust 1998-1C


                               ABN AMRO BANK N.V.,
                       acting through its Chicago Branch
                         as Class A Liquidity Provider,
                         as Class B Liquidity Provider,
                                     and
                         as 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


- ----------------------------------------------------------------------------


                             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                                     21
SECTION 2.2.  Trust Accounts                                           22
SECTION 2.3.  Deposits to the Collection Account and Special
              Payments Account                                         24
SECTION 2.4.  Distributions of Special Payments                        24
SECTION 2.5.  Designated Representatives                               26
SECTION 2.6.  Controlling Party                                        27

                                 ARTICLE III

                   RECEIPT, DISTRIBUTION AND APPLICATION OF
                               AMOUNTS RECEIVED

SECTION 3.1.  Written Notice of Distribution                           29
SECTION 3.2.  Distribution of Amounts on Deposit in the
              Collection Account                                       31
SECTION 3.3.  Distribution of Amounts on Deposit Following a
              Triggering Event                                         32
SECTION 3.4.  Other Payments                                           34
SECTION 3.5.  Payments to the Trustees and the Liquidity Providers     35
SECTION 3.6.  Liquidity Facilities                                     35

                                 ARTICLE IV

                            EXERCISE OF REMEDIES

SECTION 4.1.  Directions from the Controlling Party                    42
SECTION 4.2.  Remedies Cumulative                                      43
SECTION 4.3.  Discontinuance of Proceedings                            44
SECTION 4.4.  Right of Certificateholders to Receive Payments
              Not to Be Impaired                                       44










                                 - i -



SECTION 4.5.  Undertaking for Costs                                    44

                                ARTICLE V

                     DUTIES OF THE SUBORDINATION AGENT;
                        AGREEMENTS OF TRUSTEES, ETC.

SECTION 5.1.  Notice of Indenture Default or Triggering Event          44
SECTION 5.2.  Indemnification                                          45
SECTION 5.3.  No Duties Except as Specified in Intercreditor
              Agreement                                                45
SECTION 5.4.  Notice from the Liquidity Providers and Trustees         46

                                ARTICLE VI

                          THE SUBORDINATION AGENT

SECTION 6.1.  Authorization; Acceptance of Trusts and Duties           46
SECTION 6.2.  Absence of Duties                                        46
SECTION 6.3.  No Representations or Warranties as to Documents         46
SECTION 6.4.  No Segregation of Monies; No Interest                    46
SECTION 6.5.  Reliance; Agents; Advice of Counsel                      47
SECTION 6.6.  Capacity in Which Acting                                 47
SECTION 6.7.  Compensation                                             47
SECTION 6.8.  May Become Certificateholder                             48
SECTION 6.9.  Subordination Agent Required; Eligibility                48
SECTION 6.10. Money to Be Held in Trust                                48

                                ARTICLE VII

                    INDEMNIFICATION OF SUBORDINATION AGENT

SECTION 7.1.  Scope of Indemnification                                 48

                                ARTICLE VIII

                         SUCCESSOR SUBORDINATION AGENT

SECTION 8.1.  Replacement of Subordination Agent; Appointment of
              Successor                                                49



















                                 - ii -

                               ARTICLE IX

                        SUPPLEMENTS AND AMENDMENTS


SECTION 9.1.  Amendments, Waivers, etc.                                50
SECTION 9.2.  Subordination Agent Protected                            51
SECTION 9.3.  Effect of Supplemental Agreements                        51
SECTION 9.4.  Notice to Rating Agencies                                51

                                ARTICLE X

                              MISCELLANEOUS

SECTION 10.1.  Termination of Intercreditor Agreement                  52
SECTION 10.2.  Intercreditor Agreement for Benefit of Trustees, 
               Liquidity Providers and Subordination Agent             52
SECTION 10.3.  Notices                                                 52
SECTION 10.4.  Severability                                            53
SECTION 10.5.  No Oral Modifications or Continuing Waivers             54
SECTION 10.6.  Successors and Assigns                                  54
SECTION 10.7.  Headings                                                54
SECTION 10.8.  Counterpart Form                                        54
SECTION 10.9.  Subordination                                           54
SECTION 10.10. Governing Law                                           55
SECTION 10.11. Submission to Jurisdiction; Waiver of Jury 
               Trial; Waiver of Immunity                               55































                                 - iii -



                          INTERCREDITOR AGREEMENT

          INTERCREDITOR AGREEMENT dated as of December 14, 1998, among STATE 
STREET BANK AND TRUST COMPANY, a Massachusetts trust company ("State 
Street"), not in its individual capacity but solely as Trustee of each Trust 
(each as defined below); ABN AMRO BANK N.V., a bank organized under the laws 
of The Netherlands, acting through its Chicago Branch ("ABN AMRO"), 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 (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 US Airways at the time such Indenture is entered 
into (the "Owned Aircraft"), US Airways 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 US Airways 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, the Underwriters 
propose to purchase the Certificates issued by the Class A Trust and the 
Class B 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, pursuant to the Class C Purchase Agreement, Airbus 
Industrie Financial Services ("AIFS") proposes to purchase all of the 
Certificates issued by the Class C Trust on the terms and subject to the 
conditions set forth therein;

          WHEREAS, the Liquidity Provider proposes to enter into three 
separate revolving credit agreements with the Subordination Agent, as agent 
for the Trustee of each of the Class A















Trust, the Class B Trust and the Class C Trust, respectively, 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 Provider, by 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".

          "ABN AMRO" has the meaning assigned to such term in the recitals to 
this Agreement.

          "Acceleration" means, with respect to the amounts payable in 
respect of the Equipment Notes issued under any Indenture, such amounts 
becoming immediately due and payable by declaration or otherwise.  
"Accelerate", "Accelerated" and "Accelerating" have meanings correlative to 
the foregoing.













                                   2


         "Adjusted 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 Certificates (excluding interest, if 
any, payable with respect to the Deposits related to such Trust) and (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 Non-Performing 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 principal of the 
Performing Equipment Notes held in such Trust has been paid when due (but 
without giving effect to any Acceleration of Performing Equipment Notes) and 
such payments have been distributed to the holders of such Certificates and 
(iii) the principal of any Equipment Notes formerly held in such Trust that 
have been sold pursuant to the terms hereof has 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, of (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 
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) shall 
not apply.

          For purposes of calculating Adjusted Expected Distributions with 
respect to the Certificates of any Trust, any premium paid on the Equipment 
Notes held in such Trust that 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 Adjusted Expected Distributions.

          "Advance", with respect to any Liquidity Facility, means any 
Advances as defined in such Liquidity Facility.









                                   3


          "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" for any Class of Certificates for 
any Distribution Date means 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 with respect to such 
senior Class or Classes.

          "AIFS" has the meaning assigned to such term in the recitals to 
this Agreement.

          "Aircraft" means, with respect to each Indenture, the "Aircraft" 
referred to therein.

          "Appraisal" means a current fair market value 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.

          "Appraised Current Market Value" of any Leased Aircraft or Owned 
Aircraft means the lower of the average and the median of the three most 
recent Appraisals of such Aircraft.

          "Appraisers" means AVITAS, Inc., AvSolutions, Inc. and Morton Beyer 
and Agnew, Inc.

          "Available Amount" means, with respect to any Liquidity Facility on 
any drawing date, subject to the proviso contained in the first sentence of 
Section 3.6(g) hereof, an amount equal to (a) the Stated Amount of such 
Liquidity Facility at such time, less (b) the aggregate 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 
Pittsburgh, Pennsylvania, New York, New York, or, so long as any Certificate 
is outstanding, the city and state in which any Trustee, the Subordination 
Agent or any Loan Trustee maintains its Corporate Trust Office or receives










                                   4


and disburses funds, and that, solely with respect to draws under any 
Liquidity Facility, also is a "Business Day" as defined in such Liquidity 
Facility.

          "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 the date hereof, between the Subordination Agent, as 
agent and trustee for the Class A Trustee, ABN AMRO 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 A Liquidity Provider" means ABN AMRO, 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 the US Airways Pass Through Trust 1998-1A 
created and administered pursuant to the Class A Trust Agreement.

          "Class A Trust Agreement" means the Pass Through Trust Agreement 
dated as of December 4, 1998, between US Airways and the Class A Trustee (the 
"Basic Agreement"), as










                                   5


supplemented by the Supplement No. 1998-1A thereto dated as of the date 
hereof, governing the creation and administration of the US Airways Pass 
Through Trust 1998-1A 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 Bank and Trust Company, 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 the date hereof, between the Subordination Agent, as 
agent and trustee for the Class B Trustee, and ABN AMRO, 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 B Liquidity Provider" means ABN AMRO, 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 the US Airways Pass Through Trust 1998-1B 
created and administered pursuant to the Class B Trust Agreement.

          "Class B Trust Agreement" means the Basic Agreement, as 
supplemented by the Supplement No. 1998-1B thereto dated as of the date 
hereof, governing the creation and administration of the US Airways Pass 
Through Trust 1998-1B 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.












                                   6


          "Class B Trustee" means State Street Bank and Trust Company, 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 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 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 the date hereof, between the Subordination Agent, as 
agent and trustee for the Class C Trustee, and ABN AMRO, 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 ABN AMRO, 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).

          "Class C Purchase Agreement" means the Purchase Agreement dated 
_______, 1998 between US Airways and AIFS relating to the purchase of all of 
the Class C Certificates by AIFS, as the same may be amended, supplemented or 
otherwise modified from time to time in accordance with its terms.

          "Class C Trust" means the US Airways Pass Through Trust 1998-1C 
created and administered pursuant to the Class C Trust Agreement.

          "Class C Trust Agreement" means the Basic Agreement, as 
supplemented by the Supplement No. 1998-1C thereto dated as of the date 
hereof, governing the creation and administration of the US Airways Pass 
Through Trust 1998-1C 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.













                                   7


          "Class C Trustee" means State Street Bank and Trust Company, 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.

          "Closing Date" means December 14, 1998.

          "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 Expected Distributions or the Adjusted 
Expected Distributions with respect to the Certificates of any Trust as of 
such Distribution Date.

          "Delivery Period Expiry Date" means the earlier of (a) October 31, 
1999 and (b) the date on which Equipment Notes with respect to all New 
Aircraft (or Substitute Aircraft in lieu thereof) have been purchased by the 
Trusts in accordance with the Note Purchase Agreement.

          "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 (i) with respect to the Class A Certificates and 
the Class B Certificates, Credit Suisse First Boston, as depositary under the 
Deposit Agreement relating to each such Class of Certificates and (ii) with 
respect to the Class C Certificates, Citibank, N.A., as depositary under the 
Deposit Agreement relating to such Class of Certificates.

          "Deposits" with respect to any Class, shall have the meaning set 
forth in the Deposit Agreement pertaining to such Class.














                                   8


          "Designated Representatives" means the Subordination Agent 
Representatives, the Trustee Representatives and the LP Representatives 
identified under Section 2.5.

          "Distribution Date" means a Regular Distribution Date or a Special 
Distribution Date.

          "Dollars" 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 Final Drawing, a Non-
Extension 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; 
provided that such Liquidity Provider shall have waived all rights of set-off 
and counterclaim with respect to such account.

          "Eligible Institution" means (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.

          "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 S&P of at least A-1 and P-1, respectively, 
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 








                                   9


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 clause (a), (b) or (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. 

          "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 between the Escrow Agent, the Underwriters (in the case of 
the Class A and Class B Certificates) or AIFS (in the case of the Class C 
Certificates), 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 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 (i) 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 (ii) the principal of any Equipment Notes formerly held in 
such Trust that have been sold pursuant to the terms hereof has 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).  








                                   10


For purposes of calculating Expected 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 Expected 
Distributions.

          "Expiry Date" with respect to any Liquidity Facility, shall have 
the meaning set forth in such Liquidity Facility.

          "Fee Letter" means, the Fee Letter between ABN AMRO and the 
Subordination Agent with respect to the Liquidity Facilities and any fee 
letter entered into between the Subordination Agent and any Replacement 
Liquidity Provider.

          "Final Distributions" means, with respect to the Certificates of 
any Trust on any Distribution Date, the sum of (x) 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 (y) 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" has the meaning assigned to such term in Section 
3.6(i).

          "Final Legal Distribution Date" means (i) with respect to the Class 
A Certificates, July 30, 2019, (ii) with respect to the Class B Certificates, 
July 30, 2019 and (iii) with respect to the Class C Certificates, January 30, 
2014.

          "Financing Agreement" means each of the Participation Agreements 
and the Note Purchase Agreement.

          "Indenture" means each of the Trust Indentures entered into by the 
Loan Trustee, and the Owner Trustee or US Airways, 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.










                                   11


          "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 Section 
3.07(c), (d) or (e) of such Liquidity Facility on a Downgrade Drawing, Non-
Extension Drawing or Final Drawing thereunder.

          "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 each Indenture pertaining 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.

          "Lending Office" means, with respect to any Liquidity Facility, the 
lending office of the Liquidity Provider thereunder, presently located at 
Chicago, Illinois, or such other lending office as such Liquidity Provider 
from time to time shall notify the applicable Trustee as its lending office 
under any such Liquidity Facility, provided that such Liquidity Provider 
shall not change its Lending Office to a Lending Office outside the United 
States of America except in accordance with Section 3.01, 3.02 or 3.03 of any 
such Liquidity Facility.

          "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.

          "Liquidity Facility" means, at any time, the Class A Liquidity 
Facility, the Class B Liquidity Facility or the Class C Liquidity Facility.

          "Liquidity Obligations" means all principal, interest, fees and 
other amounts owing to the Liquidity Providers under the Liquidity 
Facilities, Section 9.1 of the Participation Agreements or the Fee Letter.

          "Liquidity Provider" means, at any time, the Class A Liquidity 
Provider, the Class B Liquidity Provider or the Class C Liquidity Provider, 
as applicable.











                                   12


          "Loan Trustee" means, with respect to any Indenture, the loan 
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 Appraisals" has the meaning assigned to such term in Section 
4.1(a).

          "LTV Collateral Amount" of any Leased Aircraft or Owned Aircraft 
for any Class of Certificates means, as of any Distribution Date, 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 40.5%, for the Class 
B Certificates 51.0%, and for the Class C Certificates, 67.0%.

          "Majority Liquidity Providers" means, at any time, Liquidity 
Providers holding at least 66-2/3% of the aggregate outstanding Liquidity 
Obligations at such time.

          "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.

          "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 assigned to such term in 
Section 3.6(d).

          "Non-Extension Drawing" has the meaning assigned to such term in 
Section 3.6(d).








                                   13


          "Non-Performing Equipment Note" means an Equipment Note issued 
pursuant to an Indenture that is not a Performing Equipment Note.

          "Note Purchase Agreement" means the Note Purchase Agreement dated 
as of the date hereof, among US Airways, each Trustee, the Escrow Agent, the 
Subordination Agent and the Paying Agent.

          "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 Class C Purchase Agreement, the Financing Agreements, the Leases, the Fee 
Letter, 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 canceled 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 US Airways 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 the satisfaction of the applicable 
Trustee the pledgee's










                                   14


right so to act with respect to such Certificates and that the pledgee is not 
US Airways 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 after 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 Agreement" means, with respect to each Indenture, 
the "Participation Agreement" referred to therein.

          "Payee" has the meaning assigned to such term in Section 2.4(e).

          "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); provided that in the 
event of a bankruptcy proceeding involving US Airways 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 the Section 1110 Period the trustee in such proceeding or US 
Airways refuses to assume or agree to perform its obligations under the Lease 
related to such Equipment Note (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.

          "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.














                                   15


          "Person" means any individual, corporation, partnership, joint 
venture, association, limited liability company, 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 for 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, payment of principal of the Equipment Notes or payment with 
respect to other Trust Property held in such Trust and the distribution 
thereof to be made on that 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 the Subordination Agent shall 
have made an Interest Drawing, or a withdrawal from the Cash Collateral 
Account, with respect thereto in an aggregate amount sufficient to pay such 
interest and shall have distributed such amount to the Trustee 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.  The initial 
Rating Agencies will be 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 January 30, and July 30, 
commencing on January 30, 1999; 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.

          "Replacement Liquidity Facility" means, for any Liquidity Facility, 
an irrevocable revolving credit agreement in substantially the form of the 
replaced Liquidity Facility, 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






                                   16


Certificates (before downgrading of such ratings, if any, as a result of the 
downgrading of the applicable Liquidity Provider), in a face amount (or in an 
aggregate face amount) equal to the amount of interest payable on the 
Certificates of such Trust (at the Stated Interest Rate for such Trust, and 
without regard to expected future principal payments) on the three Regular 
Distribution Dates following the date of replacement of such Liquidity 
Facility and issued by a Person (or Persons) having unsecured short-term debt 
ratings issued by both Rating Agencies which are equal to or higher than the 
Threshold Rating.  Without limitation of the form that a Replacement 
Liquidity Facility otherwise may have pursuant to the preceding sentence, a 
Replacement Liquidity Facility for any Class of Certificates may have a 
stated expiration date earlier than 15 days after the Final Maturity Date of 
such Class of Certificates so long as such Replacement Liquidity Facility 
provides for a Non-Extension Drawing as contemplated by Section 3.6(d) 
hereof.

          "Replacement Liquidity Provider" means a Person who issues a 
Replacement Liquidity Facility.

          "Required Amount" means, with respect to each Liquidity Facility, 
or the Cash Collateral Account, for any Class, 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 of such Liquidity Provider.

          "Scheduled Payment" means, with respect to any Equipment Note, (i) 
any payment of principal or 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


          "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 6.85% Series A Equipment Notes 
issued pursuant to each Indenture by the related Owner Trustee or US Airways, 
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 7.35% Series B Equipment Notes 
issued pursuant to each Indenture by the related Owner Trustee or US Airways, 
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 6.82% Series C Equipment Notes 
issued pursuant to each Indenture by the related Owner Trustee or US Airways, 
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.

          "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).

          "Special Payments Account" means the Eligible Deposit Account 
created pursuant to Section 2.2 as a sub-account to the Collection Account.

          "Standard & Poor's" means Standard & Poor's Ratings Services, a 
division of The McGraw-Hill Companies, Inc.

          "State Street" has the meaning assigned to such terms in the 
preliminary statements to this Agreement.

          "Stated Amount" with respect to any Liquidity Facility, means the 
Maximum Commitment (as defined in such Liquidity Facility) of the applicable 
Liquidity Provider thereunder.

          "Stated Expiration Date" has the meaning specified in Section 
3.6(d).














                                   18


          "Stated Interest Rate" means (i) with respect to the Class A 
Certificates, 6.85% per annum, (ii) with respect to the Class B Certificates, 
7.35% per annum, and (iii) with respect to the Class C Certificates, 6.82% 
per annum.

          "Subordination Agent" has the meaning assigned to it in the 
preliminary statements to this Agreement.

          "Subordination Agent Incumbency Certificate" has the meaning 
assigned to such term in Section 2.5(a).

          "Subordination Agent Representatives" has the meaning assigned to 
such term in Section 2.5(a).

          "Substitute Aircraft" shall have the meaning set forth in the Note 
Purchase 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 of America 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.

          "Tax Letter" means the Tax Letter dated December 14, 1998 between 
ABN AMRO and US Airways with respect to the Liquidity Facilities, and all tax 
letters entered into between US Airways and any Replacement Liquidity 
Provider.

          "Termination Notice" with respect to any Liquidity Facility has the 
meaning assigned to such term in such Liquidity Facility.

          "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











                                   19


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 US Airways 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).

          "Trust Agreement" means any of the Class A Trust Agreement, the 
Class B Trust Agreement or the Class C Trust Agreement.

          "Trust Property" with respect to any Trust, has the meaning set 
forth in the Trust Agreement for such Trust.

          "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 Morgan Stanley & Co. Incorporated, Credit 
Suisse First Boston Corporation, Lehman Brothers Inc., and Salomon Brothers 
Inc.

          "Underwriting Agreement" means the Underwriting Agreement dated 
December 4, 1998 among the Underwriters and US Airways, relating to the 
purchase of the Class A Certificates and the Class B Certificates by the 
Underwriters, as the same may be amended, supplemented or otherwise modified 
from time to time in accordance with its terms.

          "US Airways" means US Airways, Inc., a Delaware corporation, and 
its successors and assigns.

          "US Airways Bankruptcy Event" means the occurrence and continuation 
of any of the following:












                                   20


          (a) US Airways shall consent to the appointment of or the taking of 
possession by a receiver, trustee or liquidator of itself or of a substantial 
part of its property, or US Airways shall admit in writing its inability to 
pay its debts generally as they come due, or does not pay its debts generally 
as they become due or shall make a general assignment for the benefit of 
creditors, or US Airways shall file a voluntary petition in bankruptcy or a 
voluntary petition or an answer seeking reorganization, liquidation or other 
relief in a case under any bankruptcy laws or other insolvency laws (as in 
effect at such time) or an answer admitting the material allegations of a 
petition filed against US Airways in any such case, or US Airways shall seek 
relief by voluntary petition, answer or consent, under the provisions of any 
other bankruptcy or other similar law providing for the reorganization or 
winding-up of corporations (as in effect at such time) or US Airways shall 
seek an agreement, composition, extension or adjustment with its creditors 
under such laws, or US Airways's board of directors shall adopt a resolution 
authorizing corporate action in furtherance of any of the foregoing; or

          (b) an order, judgment or decree shall be entered by any court of 
competent jurisdiction appointing, without the consent of US Airways, a 
receiver, trustee or liquidator of US Airways or of any substantial part of 
its property, or any substantial part of the property of US Airways shall be 
sequestered, or granting any other relief in respect of US Airways as a 
debtor under any bankruptcy laws or other insolvency laws (as in effect at 
such time), and any such order, judgment or decree of appointment or 
sequestration shall remain in force undismissed, unstayed and unvacated for a 
period of 60 days after the date of entry thereof; or

          (c) a petition against US Airways in a case under any bankruptcy 
laws or other insolvency laws (as in effect at such time) is filed and not 
withdrawn or dismissed within 60 days thereafter, or if, under the provisions 
of any law providing for reorganization or winding-up of corporations which 
may apply to US Airways, any court of competent jurisdiction assumes 
jurisdiction, custody or control of US Airways or of any substantial part of 
its property and such jurisdiction, custody or control remains in force 
unrelinquished, unstayed and unterminated for a period of 60 days.

          "US Airways Provisions" has the meaning specified in Section 
9.1(a).

          "Written Notice" means, from the Subordination Agent, any Trustee 
or Liquidity Provider, a written instrument executed by the Designated 
Representative of such Person.  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.















                                   21


                               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 or its nominee, 
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 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.








                                   22


          (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; 
(or, in the case of any amount on deposit in the Cash Collateral Account with 
respect to any Liquidity Facility (with respect to such Liquidity Facility, 
the "Relevant Amount"), (A) in the case of a portion of the Relevant Amount 
equal to the amount scheduled to be paid to the Liquidity Provider with 
respect to such Liquidity Facility on the Regular Distribution Date next 
following the date of such investment in accordance with clause (iv), (v) or 
(vi) of Section 3.6(f), the Business Day immediately preceding such Regular 
Distribution Date, or (B) in the case of a portion of the Relevant Amount 
equal to the Relevant Amount minus the amount described in clause (A) above, 
the Business Day immediately preceding the scheduled Interest Payment Date 
with respect to such Liquidity Facility next following the date of such 
investment); provided, however, that following the making of a Downgrade 
Drawing or a Non-Extension Drawing under any Liquidity Facility, the 
Subordination Agent shall invest and reinvest such amounts in Eligible 
Investments at the direction of US Airways (or, if and to the extent so 
specified to the Subordination Agent by US Airways with respect to any 
Liquidity Facility, the Liquidity Provider with respect to such Liquidity 
Facility); provided further, however, that upon the occurrence and during the 
continuation of a Triggering Event, the Subordination Agent shall invest and 
reinvest such amounts in accordance with the written instructions of the 
Controlling Party.  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 other amounts on deposit in the Collection 
Account are 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.  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 
expressly 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






                                   23


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 State 
Street 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) below, 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 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 the Business 
Day which immediately follows the later to occur of (x) the 15th day after 
the date of such Written Notice or (y) the date 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) Redemptions and Purchases of Equipment Notes.  (i)  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, purchase (including, without limitation, a purchase resulting 
from a sale of the Equipment Notes permitted by Article IV hereof) or 
prepayment 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









                                   24


     (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 (including
     interest accrued and unpaid on any Interest Drawing or any Applied
     Provider Advance (as defined in any Liquidity Facility)) 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 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 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 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;










                                   25


     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.

For the purposes of this Section 2.4(b), clause (x) of the definition of 
"Expected Distributions" shall be deemed to read as follows: "(x) accrued, 
due and unpaid interest on such Certificates together with (without 
duplication) accrued and unpaid interest on a portion of such Certificates 
equal to the outstanding principal amount of Equipment Notes being redeemed, 
purchased or prepaid (immediately prior to such redemption, purchase or 
prepayment) (excluding interest, if any, payable with respect to the Deposits 
related to such Trust)".

          (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 US Airways in respect of any 
Trustee, any Liquidity Provider, any Paying Agent, any Depositary or any 
Escrow Agent (collectively, the "Payees") and (ii) any compensation 
(including, without 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 US Airways under any Operative Agreement in 
respect of any Payee, directly to the Payee entitled thereto. 











                                   26


          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 Responsible Officer 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 
Subordination Agent Representatives and 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 under such Indenture or with respect to 
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 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







                                   27


clause (i) in accordance with the directions of the Trustees (in the case of 
each such Trustee, with respect to the Equipment Notes issued under such 
Indenture and held as Trust Property of such Trust) constituting, in the 
aggregate, directions with respect to 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 under such 
Indenture or with respect to 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: (x) the Class A Trustee; (y) upon payment of Final 
Distributions to the holders of Class A Certificates, the Class B Trustee; 
and (z) 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.









                                   28


          (d) The exercise of remedies by the Controlling Party under this 
Agreement shall be expressly limited by Section 4.1(a)(ii) hereof.

          (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 
Regular 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 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 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 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 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 "eighth" of Section 3.2 hereof.

The notices required under this Section 3.1(a) may be in the form of a 
schedule or similar document provided to the Subordination Agent by the 
parties referenced therein or by any one of them, which schedule or similar 
document may state that, unless there has been a prepayment of the 
Certificates, such schedule or similar document is to remain in effect until 
any substitute notice or amendment shall be given to the Subordination Agent 
by the party providing such notice.













                                   29


          (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:

          (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" (to reimburse payments made by the Class A Certificateholders 
pursuant to subclause (iii) of clause "first" of Section 3.3 hereof) 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" (to reimburse payments made by the Class B Certificateholders 
pursuant to subclause (iii) of clause "first" of Section 3.3 hereof) 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" (to reimburse payments made by the Class C Certificateholders 
pursuant to subclause (iii) of clause "first" of Section 3.3 hereof) 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 to it 
in accordance with subclause (iii) of clause "first" of Section 3.3 hereof 
and 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









                                   30


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 paragraph (a) or (b) above which is 
required to enable the Subordination Agent to make a distribution to such 
Person pursuant to Section 3.2 or 3.3 hereof, the Subordination Agent shall 
request such information and, failing to receive any such information, the 
Subordination Agent shall not make such distribution(s) to such Person.  In 
such event, the Subordination Agent shall make distributions pursuant to 
clauses "first" through "ninth" 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, but in any event 
automatically at the end of each calendar quarter, 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 Regular Distribution Date (or, 
in the case of any amount described in Section 2.4(c), on the Special 
Distribution Date thereof) 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, or in the amount, provided in the applicable Liquidity
     Facility) and unpaid shall be distributed to the Liquidity Providers
     pari passu on the basis of the amount of such 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 








                                   31


     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
     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 amount remaining thereafter
     shall be held in the Collection Account for later distribution in
     accordance with this Article III.

          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









                                   32


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 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 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 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








                                   33


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) 
     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; and

          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.

          SECTION 3.4.  Other Payments.  (a)  Any payments received by the 
Subordination Agent for which no provision as to the application thereof is 
made in this 










                                   34


Agreement shall be distributed by the Subordination Agent (i) in the order of 
priority specified in Section 3.3 hereof and (ii) to the extent received or 
realized at any time after the Final Distributions for each Class of 
Certificates have been made, in the manner provided in clause "first" of 
Section 3.3 hereof.

          (b) On any Interest Payment Date under each Liquidity Facility 
which is not a Distribution Date, the Subordination Agent shall pay to the 
Liquidity Provider under such Liquidity Facility from, and to the extent of, 
amounts on deposit in the Collection Account, an amount equal to the amount 
of interest then due and payable to such Liquidity Provider under such 
Liquidity Facility.

          (c) Except as otherwise provided in Section 3.3 hereof, if the 
Subordination Agent receives any Scheduled Payment after the Scheduled 
Payment Date relating thereto, but prior to such payment becoming an Overdue 
Scheduled Payment, then the Subordination Agent shall deposit such Scheduled 
Payment in the Collection Account and promptly distribute such Scheduled 
Payment in accordance with the priority of distributions set forth in Section 
3.2 hereof; provided that, for the purposes of this Section 3.4(c) only, each 
reference in clause "eighth" of Section 3.2 to "Distribution Date" shall be 
deemed to mean the actual date of payment of such Scheduled Payment and each 
reference in clause "fifth", "sixth" or "seventh" of Section 3.2 to 
"Distribution Date" shall be deemed to refer to such Scheduled Payment Date.

          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 funds at 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 1:00 p.m.(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) the amount of such 
accrued interest (at the Stated Interest Rate for such Class of Certificates) 
and (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.









                                   35


          (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, 
(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 short-term unsecured 
debt rating of any Liquidity Provider issued by either Rating Agency is lower 
than the applicable Threshold Rating, within 10 days after receiving notice 
of such downgrading (but not later than the expiration date of the Liquidity 
Facility issued by the downgraded Liquidity Provider (the "Downgraded 
Facility")), such Liquidity Provider or US Airways 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 10th day (or if such 10th 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 
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 Borrower, 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 such 25th day, 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 Borrower 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 






                                   36


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 a Non-Extension Drawing shall be maintained and invested in 
accordance with Section 3.6(f) hereof. 

          (e) Issuance of Replacement Liquidity Facility.  (i)  At any time, 
US Airways may, at its option, with cause or without cause, arrange for a 
Replacement Liquidity Facility to replace any Liquidity Facility for any 
Class of Certificates (including any Replacement Liquidity Facility provided 
pursuant to Section 3.6(e)(ii) hereof); provided, however, that ABN AMRO 
shall not be replaced by US Airways as a Liquidity Provider with respect to 
any Class of Certificates prior to the fifth anniversary of the Closing Date 
unless (A) there shall have become due to the initial Liquidity Provider, or 
the initial Liquidity Provider shall have demanded, amounts pursuant to 
Section 3.01, 3.02 or 3.03 of any Liquidity Facility or pursuant to the Tax 
Letter and the replacement of the initial Liquidity Provider would reduce or 
eliminate the obligation to pay such amounts or US Airways determines in good 
faith that there is a substantial likelihood that the initial Liquidity 
Provider will have the right to claim any such amounts (unless the initial 
Liquidity Provider waives, in writing, any right it may have to claim such 
amounts), which determination shall be set forth in a certificate delivered 
by US Airways to the initial Liquidity Provider setting forth the basis for 
such determination and accompanied by an opinion of outside counsel selected 
by US Airways and reasonably acceptable to the initial Liquidity Provider 
verifying the legal conclusions, if any, of such certificate relating to such 
basis, provided that, in the case of any likely claim for such amounts based 
upon any proposed, or proposed change in, law, rule, regulation, 
interpretation, directive, requirement, request or administrative practice, 
such opinion may assume the adoption or promulgation of such proposed matter, 
(B) it shall become unlawful or impossible for the initial Liquidity Provider 
(or its Lending Office) to maintain or fund its LIBOR Advances as described 
in Section 3.10 of any Liquidity Facility, (C) the short-term unsecured debt 
rating of the initial Liquidity Provider is downgraded by Standard & Poor's 
from A-1+ to A-1 and there is a resulting downgrade in the rating by any 
Rating Agency of any Class of Certificates, (D) a Downgrade Drawing or a Non-
Extension Drawing shall have occurred under any Liquidity Facility or (E) the 
initial Liquidity Provider shall have breached any of its payment (including, 
without limitation, funding) obligations under any Liquidity Facility.  If 
such Replacement Liquidity Facility is provided at any time after a Downgrade 
Drawing or Non-Extension Drawing has been made, all funds on deposit in the 
relevant Cash Collateral Account will be returned to the Liquidity Provider 
being replaced.  

          (ii) If any Liquidity Provider shall determine not to extend any of
     its Liquidity Facility in accordance with Section 3.6(d), then such
     Liquidity Provider may, at its option, arrange for a Replacement 
     Liquidity Facility to replace such Liquidity Facility during the period 
     no earlier than 40 days and no later than 25 days prior to the then 
     effective Stated Expiration Date of such Liquidity Facility.  








                                   37


          (iii) No Replacement Liquidity Facility arranged by US Airways or a
     Liquidity Provider in accordance with clause (i) or (ii) above,
     respectively, shall become effective and no such Replacement Liquidity 
     Facility shall be deemed a "Liquidity Facility" under the Operative 
     Agreements (in each case other than insofar as necessary to permit the 
     repayment of amounts owed to the replaced Liquidity Provider), unless 
     and until (A) each of the conditions referred to in clause (iv) below 
     shall have been satisfied, (B) 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 and (C) in the case of a Replacement Liquidity Facility 
     arranged by a Liquidity Provider under Section 3.6(e)(ii), such 
     Replacement Liquidity Facility is acceptable to US Airways.

          (iv) 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 any rating then in effect for any Class of 
     Certificates by such Rating Agency (without regard to any downgrading of 
     any rating 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 
     (v) of Section 3.6(f) hereof, and thereafter from any other available 
     source, including, without limitation, a drawing under the Replacement 
     Liquidity Facility) 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.
 

          (v) Upon satisfaction of the conditions set forth in clauses (iii)
     and (iv) of this Section 3.6(e), (w) the replaced Liquidity Facility 
     shall terminate, (x) the Subordination Agent shall, if and to the extent 
     so requested by US Airways or the Liquidity Provider being replaced, 
     execute and deliver any certificate or other instrument required in 
     order to terminate the replaced Liquidity Facility, shall surrender the 
     replaced Liquidity Facility to the Liquidity Provider being replaced and 
     shall execute and deliver the Replacement Liquidity Facility and any 
     associated Fee Letter, (y) each of the parties hereto shall enter into 
     any amendments to this Agreement necessary to give effect to (1) the 
     replacement of the applicable Liquidity Provider with the applicable 
     Replacement Liquidity Provider and (2) the replacement of the applicable 
     Liquidity Facility with the applicable Replacement Liquidity Facility 
     and (z) the applicable 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







                                   38


     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) hereof, or in 
the event amounts are to be deposited in the Cash Collateral Account pursuant 
to subclause (B) of clause "third" of Section 2.4(b), subclause (B) of clause 
"third" of Section 3.2 or subclause (B) of clause "fourth" of Section 3.3, 
amounts so drawn or to be deposited, as the case may be, 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.  All amounts on deposit in each Cash Collateral Account shall 
be invested and reinvested in Eligible Investments in accordance with 
Section 2.2(b) hereof.  Investment Earnings on amounts on deposit in the Cash 
Collateral Account with respect to each Liquidity Facility shall be deposited 
in the Collection Account on each Interest Payment Date under such Liquidity 
Facility and applied on such Interest Payment Date in accordance with Section 
3.2, 3.3 or 3.4 (as applicable).  The Subordination Agent shall deliver a 
written statement to US Airways and the Liquidity Provider one day prior to 
each Interest Payment Date setting forth the aggregate amount of Investment 
Earnings held in the 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 due and owing 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 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 due and owing 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 due and owing 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







                                   39


     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) 0n 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), an amount equal to
     the sum of the Required Amount (with respect to the Class A Liquidity
     Facility) plus Investment Earnings on deposit in such Cash Collateral
     Account will be on deposit in the Class A Cash Collateral Account and
     shall first, pay such amount to the relevant Class A Liquidity Provider
     until the Liquidity Obligations (with respect to the Class A
     Certificates) owing to such Liquidity Provider 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), an amount equal to 
     the sum of the Required Amount (with respect to the Class B Liquidity 
     Facility) plus Investment Earnings on deposit in such Cash Collateral 
     Account will be on deposit in the Class B Cash Collateral Account and 
     shall first, pay such amount to the relevant Class B Liquidity Provider 
     until the Liquidity Obligations (with respect to the Class B 
     Certificates) owing to such Liquidity Provider shall have been paid in 
     full, and second, deposit any remaining amount in the Collection
     Account;

          (vi) on each date on which the Pool Balance of the Class C Trust
     shall have been reduced by payments made to 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), an amount equal to 
     the sum of the Required Amount (with respect to the Class C Liquidity 
     Facility) plus Investment Earnings on deposit in such Cash Collateral 
     Account will be on deposit in the Class C Cash Collateral Account and 
     shall first, pay such amount to the relevant Class C Liquidity Provider 
     until the Liquidity Obligations (with






                                   40


respect to the Class C Certificates) owing to such Liquidity Provider 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 the replaced Liquidity Provider 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 
of such Interest Drawing so reimbursed to the applicable Liquidity Provider 
but not to exceed the Stated 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 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 (y) a Final Drawing shall have occurred 
with respect to such Liquidity Facility.  In the event that, with respect to 
any particular Liquidity Facility (i) funds are withdrawn from any Cash 
Collateral Account pursuant to clause (i) or (ii) of Section 3.6(f) hereof or 
(ii) such 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, then 
funds received by the Subordination Agent at any time other than (x) any time 
when a Liquidity Event of Default shall have occurred and be continuing with 
respect to such Liquidity Facility and a Performing Note Deficiency exists or 
(y) any time after a Final Drawing shall have occurred with respect to such 
Liquidity Facility shall be deposited in such Cash Collateral Account as and 
to the extent 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.

          (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.









                                   41


          (i) Final Drawing.  Upon receipt from a Liquidity Provider of a 
Termination Notice with respect to any Liquidity Facility, the Subordination 
Agent shall, not later than the date specified in such Termination Notice, in 
accordance with and to the extent permitted by the terms of such Liquidity 
Facility, request a drawing under such Liquidity Facility of all available 
and undrawn amounts thereunder (a "Final Drawing").  Amounts drawn pursuant 
to a Final Drawing shall be maintained and invested 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 reduction in the Pool Balance with 
respect to such Certificates, the Subordination Agent shall, if any such 
Liquidity Facility provides for reductions of the Stated Amount of such 
Liquidity Facility and if such reductions are not automatic, request such 
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 Subordination 
Agent, which in turn 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 Accelerating such Equipment 
Notes 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 
and the provisions of the next paragraph, 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.










                                   42


          (ii) 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, 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 US Airways 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 US Airways 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 
     US Airways 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 Aircraft subject to such Indenture.

          (iv) After a Triggering Event occurs and any Equipment Note becomes 
a Non-Performing Equipment Note, the Subordination Agent shall obtain 
Appraisals with respect to all of the Aircraft (the "LTV Appraisals") 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 such 
LTV Appraisals, the Controlling Party shall have the right to obtain or cause 
to be obtained substitute any 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 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, subject to the terms and conditions of the related 
Indenture, instruct the Loan Trustee under such Indenture to foreclose on the 
Lien on the related Aircraft.

          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










                                   43


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 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 Proceeding 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 Proceeding, 
be restored to its former position and rights hereunder, and all rights, 
remedies and powers of such party shall continue as if no such Proceeding 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 hereunder 
(including without limitation 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 Proceeding for the 
enforcement of any right or remedy under this Agreement or in any Proceeding 
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.










                                   44
                               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 or courier to the 
Rating Agencies, the 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








                                   45


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 any other Operative Agreement.

          SECTION 5.4.  Notice from the Liquidity Providers and Trustees.  If 
any Liquidity Provider or Trustee has notice of an Indenture Default or a 
Triggering Event, such Person shall promptly 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, the Class B Trustee and the 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. State Street 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 ordinary negligence in the handling of 
funds), (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










                                   46


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 or deposited 
into one or more Trust Accounts need 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.









                                   47


          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 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 of America, 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.





                                   48


                               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 Sections of such 
agreements shall survive the termination of this Agreement.


                              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 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 shall promptly appoint a successor 
Subordination Agent.

          A successor Subordination Agent shall deliver (x) a written 
acceptance of its appointment as Subordination Agent hereunder to the 
retiring Subordination Agent and (y) a written assumption of its obligations 
hereunder and under each Liquidity Facility to each party hereto, 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 mail a notice of its succession to the 
Liquidity Providers and the Trustees.  The retiring Subordination













                                   49


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 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 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 (x) any Trustee if such supplement, 
amendment or modification (i) is in accordance with Section 9.1(c) hereof or 
(ii) cures an ambiguity or inconsistency or does not materially adversely 
affect such Trustee or the holders of the related Class of Certificates and 
(y) any Liquidity Provider if such supplement, amendment or modification is 
in accordance with Section 9.1 hereof; provided further, however, that, if 
such supplement, amendment or modification (A) 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 "US Airways Provisions") or (y) otherwise adversely affect 
the interests of a potential Replacement Liquidity Provider or of US Airways 
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 or (B) is made pursuant to Section 9.1(c), then such 
supplement, amendment or modification shall not be effective without the 
additional written consent of US Airways.  Notwithstanding the foregoing, 
without the consent







                                   50


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), except as provided in Section 9.1(c), 
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.

          (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 US 
Airways under any Lease or reduce the amount of principal or interest payable 
by US Airways 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, consent or supplement hereto pursuant to the 
provisions hereof, this Agreement shall be and be deemed to be and shall 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 and shall 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








                                   51


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.


                                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.  Subject to the second sentence 
of Section 10.6 and the provisions of Section 4.4, 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.

          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



















                                   52


          (i) if to the Subordination Agent, addressed to at its office at:

          STATE STREET BANK AND TRUST COMPANY
          Two International Place, 4th Floor
          Boston, MA 02110

          Attention:  Corporate Trust Department
          Telephone: (617) 664-5340
          Telecopy:  (617) 664-5151

          (ii) if to any Trustee, addressed to it at its office at:

          STATE STREET BANK AND TRUST COMPANY
          Two International Place, 4th Floor
          Boston, MA 02110

          Attention:  Corporate Trust Department
          Telephone: (617) 664-5340
          Telecopy:  (617) 664-5151

          (iii) if to the Liquidity Provider, addressed to it at its office
           at:

          ABN AMRO Bank N.V.
          135 South LaSalle Street, #660
          Chicago, IL  60674-9135

          Attention: Claudia Heldring
          Telephone: (312) 904-2900
          Telecopy: (312) 606-8428

          with a copy to:

          ABN AMRO Bank N.V.
          135 South LaSalle Street, #625
          Chicago, IL  60674-9135

          Attention: Loan Administration
          Telephone: (312) 904-2961
          Telecopy: (312) 904-1288

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.  Any party hereto may change the address to















                                   53


which notices to such party will be sent by giving notice of such change to 
the other parties to this Agreement.

          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.  In addition, the US Airways Provisions shall inure to the 
benefit of US Airways and its successors and assigns, and (without limitation 
of the foregoing) US Airways is hereby constituted, and agreed to be, an 
express third party beneficiary of the US Airways Provisions.

          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









                                   54


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 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 may not be 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;













                                   55


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:

          (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 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










                                   56


SUBSEQUENT AMENDMENTS, RENEWALS, SUPPLEMENTS OR MODIFICATIONS TO THIS 
AGREEMENT.

          (c) The Liquidity Provider hereby waives any immunity it may have 
from the jurisdiction of the courts of the United States of America or of any 
State and waives any immunity any of its properties located in the United 
States of America may have from attachment or execution upon a judgment 
entered by any such court under the United States Foreign Sovereign 
Immunities Act of 1976 or any similar successor legislation.



















































                                   57


          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.


                         STATE STREET BANK AND TRUST COMPANY 
                              not in its individual capacity but solely as
                              Trustee for each of the Trusts


                            By
                               -----------------------------

                               Name:
                               Title:


                         ABN AMRO BANK N.V., acting through its Chicago
                               Branch, as Class A Liquidity Provider,
                               Class B Liquidity Provider and
                               Class C Liquidity Provider


                            By
                              ------------------------------

                               Name:
                               Title:

                            By
                               Name:
                               Title:

                         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
                              ------------------------------

                               Name:
                               Title:














                                   58






EXHIBIT 4(a)(x)












                      ESCROW AND PAYING AGENT AGREEMENT
                                  (Class A)

                        Dated as of December 14, 1998

                                    among

                  FIRST SECURITY BANK, NATIONAL ASSOCIATION 
                               as Escrow Agent

                      MORGAN STANLEY & CO. INCORPORATED

                   CREDIT SUISSE FIRST BOSTON CORPORATION

                            LEHMAN BROTHERS INC.

                                     and

                          SALOMON SMITH BARNEY INC.
                               as Underwriters

                     STATE STREET BANK AND TRUST COMPANY,
                       not in its individual capacity,
                      but solely as Pass Through Trustee
                            for and on behalf of
                    US Airways Pass Through Trust 1998-1A
                           as Pass Through Trustee

                                     and

                     STATE STREET BANK AND TRUST COMPANY
                               as Paying Agent



















                             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    4
     Section 1.4   Payments to Receiptholders                            5
     Section 1.5   Mutilated, Destroyed, Lost or Stolen Escrow Receipt   5
     Section 1.6   Additional Escrow Amounts                             6
     Section 1.7   Resignation or Removal of Escrow Agent                6
     Section 1.8   Persons Deemed Owners                                 6
     Section 1.9   Further Assurances                                    7

SECTION 2.   Paying Agent                                                7
     Section 2.1   Appointment of Paying Agent                           7
     Section 2.2   Establishment of Paying Agent Account                 7
     Section 2.3   Payments from Paying Agent Account                    8
     Section 2.4   Withholding Taxes                                     9
     Section 2.5   Resignation or Removal of Paying Agent                9
     Section 2.6   Notice of Final Withdrawal                            9

SECTION 3.   Payments                                                   10

SECTION 4.   Other Actions                                              10

SECTION 5.   Representations And Warranties of The Escrow Agent         11

SECTION 6.   Representations And Warranties of The Paying Agent         12

SECTION 7.   Indemnification                                            13

SECTION 8.   Amendment, Etc                                             13

SECTION 9.   Notices                                                    14

SECTION 10.  Transfer                                                   15













                                   ii









SECTION 11.  Entire Agreement                                           15

SECTION 12.  Governing Law                                              15

SECTION 13.  WAIVER OF JURY TRIAL RIGHT                                 15

SECTION 14.  Counterparts                                               15





                             EXHIBITS
                             --------



Exhibit A    Escrow Receipt

Exhibit B    Withdrawal Certificate








































                                   iii


     This ESCROW AND PAYING AGENT AGREEMENT (Class A) dated as of December 
14, 1998 (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"); Morgan Stanley & Co. 
Incorporated, Credit Suisse First Boston Corporation, Lehman Brothers Inc. 
and Salomon Smith Barney 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, a Massachusetts trust company, 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, a Massachusetts 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, US Airways, Inc. ("US Airways") 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 December 4, 
1998 (together, as amended, modified or supplemented from time to time in 
accordance with the terms thereof, the "Pass Through Trust Agreement") 
relating to US Airways Pass Through Trust 1998-1A (the "Pass Through Trust") 
pursuant to which the US Airways Pass Through Trust, Series 1998-1A 
Certificates referred to therein (the "Certificates") are being issued;

     WHEREAS, US Airways and the Underwriters have entered into an 
Underwriting Agreement dated as of December 4, 1998 (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, US Airways, 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 US Airways, 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 Credit 
Suisse First Boston, acting through its New York 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 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

                                   2


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 then 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).

     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) 
October 31, 1999 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

                                   3


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 
November 1, 1999, and there are unwithdrawn Deposits on such date, the Final 
Withdrawal Date shall be deemed to be November 16, 1999.

     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 $291,181,330 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 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.

                                   4


     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 US Airways, 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.

                                   5


     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. 

     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 
Rating 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.

                                   6


     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 
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.

                                   7


     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 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.

                                   8


          (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. 

     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

                                   9


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.

                                   10


     SECTION 5.  Representations And Warranties of The Escrow Agent.  The 
Escrow Agent represents and warrants to US Airways, the Investors, the Paying 
Agent and the Pass Through Trustee as follows:

          (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

                                   11


          (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.

     SECTION 6.  Representations And Warranties of The Paying Agent.  The 
Paying Agent represents and warrants to US Airways, 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;


                                   12


          (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 
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 US Airways 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

                                   13


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, 2 International Place, 4th 
Floor, Boston, MA 02110, Attention:  Corporate Trust Administration 
(Telecopier:  (617) 664-5151) 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 copy to US Airways, US Airways, Inc., 2345 Crystal 
Drive, Arlington, VA 22227, Attention:  Treasurer (Telecopier:  (703) 872-
5936) (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.

                                   14


     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. 















                                   15



     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, not in its individual capacity, but 
solely as Pass Through Trustee for and on behalf of US Airways Pass Through 
Trust 1998-1A

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



STATE STREET BANK AND TRUST COMPANY as Paying Agent

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



FIRST SECURITY BANK, NATIONAL ASSOCIATION, as Escrow Agent 

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



MORGAN STANLEY & CO. INCORPORATED, CREDIT SUISSE FIRST BOSTON CORPORATION and 
SALOMON SMITH BARNEY INC., as Underwriters

By:  MORGAN STANLEY & CO. INCORPORATED

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


















                                                                 EXHIBIT A 
                                                                 ------- - 

                     US Airways 1998-1A 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 December 14, 1998 (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"), Morgan Stanley & Co. Incorporated, 
Credit Suisse First Boston Corporation, Lehman Brothers Inc. and Salomon 
Smith Barney Inc.,  as Underwriters, State Street Bank and Trust Company, 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

                                   A-1


recourse to US Airways, 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 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:  December   , 1998
                ---

                                    FIRST SECURITY BANK, NATIONAL
                                    ASSOCIATION, as Escrow Agent


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







                                   A-2


































                                                                 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, dated as of 
December 14, 1998 (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 (212) 325-8319.

                         Very truly yours,

                         STATE STREET BANK AND TRUST COMPANY,
                         not in its individual capacity but
                         solely as Pass Through Trustee



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



Dated:           ,    
       ----------  ---















                                   B-1






                    NOTICE OF PURCHASE WITHDRAWAL
                    ------ -- -------- ----------


CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, NY  10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class A) dated as of 
December 14, 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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:           ,     
      -----------  ----










                                   B-2




EXHIBIT 4(a)(xi)

                      ESCROW AND PAYING AGENT AGREEMENT
                                  (Class B)

                       Dated as of December 14, 1998

                                     among

                  FIRST SECURITY BANK, NATIONAL ASSOCIATION 
                               as Escrow Agent

                      MORGAN STANLEY & CO. INCORPORATED

                   CREDIT SUISSE FIRST BOSTON CORPORATION

                             LEHMAN BROTHERS INC.

                                     and

                          SALOMON SMITH BARNEY INC.
                               as Underwriters

                    STATE STREET BANK AND TRUST COMPANY,
                       not in its individual capacity,
                     but solely as Pass Through Trustee
                             for and on behalf of
                    US Airways Pass Through Trust 1998-1B
                           as Pass Through Trustee

                                     and

                     STATE STREET BANK AND TRUST COMPANY
                               as Paying Agent





























                              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       4
     Section 1.4  Payments to Receiptholders                               5
     Section 1.5  Mutilated, Destroyed, Lost or Stolen Escrow Receipt      5
     Section 1.6  Additional Escrow Amounts                                6
     Section 1.7  Resignation or Removal of Escrow Agent                   6
     Section 1.8  Persons Deemed Owners                                    6
     Section 1.9  Further Assurances                                       7

SECTION 2.  Paying Agent                                                   7
     Section 2.1  Appointment of Paying Agent                              7
     Section 2.2  Establishment of Paying Agent Account                    7
     Section 2.3  Payments from Paying Agent Account                       8
     Section 2.4  Withholding Taxes                                        9
     Section 2.5  Resignation or Removal of Paying Agent                   9
     Section 2.6  Notice of Final Withdrawal                               9

SECTION 3.  Payments                                                      10

SECTION 4.  Other Actions                                                 10

SECTION 5.  Representations And Warranties of The Escrow Agent            11

SECTION 6.  Representations And Warranties of The Paying Agent            12

SECTION 7.  Indemnification                                               13

SECTION 8.  Amendment, Etc                                                13

SECTION 9.  Notices                                                       14

SECTION 10. Transfer                                                      15



                                      ii


SECTION 11. Entire Agreement                                              15

SECTION 12. Governing Law                                                 15

SECTION 13. WAIVER OF JURY TRIAL RIGHT                                    15

SECTION 14. Counterparts                                                  15



                                   EXHIBITS
                                   --------

Exhibit A   Escrow Receipt

Exhibit B   Withdrawal Certificate















                                     iii


     This ESCROW AND PAYING AGENT AGREEMENT (Class B) dated as of December 
14, 1998 (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"); Morgan Stanley & Co. 
Incorporated, Credit Suisse First Boston Corporation, Lehman Brothers Inc. 
and Salomon Smith Barney 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, a Massachusetts trust company, 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, a Massachusetts 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, US Airways, Inc. ("US Airways") 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 December 4, 
1998 (together, as amended, modified or supplemented from time to time in 
accordance with the terms thereof, the "Pass Through Trust Agreement") 
relating to US Airways Pass Through Trust 1998-1B (the "Pass Through Trust") 
pursuant to which the US Airways Pass Through Trust, Series 1998-1B 
Certificates referred to therein (the "Certificates") are being issued;

     WHEREAS, US Airways and the Underwriters have entered into an 
Underwriting Agreement dated as of December 4, 1998 (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, US Airways, 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 US Airways, 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 Credit 
Suisse First Boston, acting through its New York 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 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

                                      2


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 then 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).

     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) 
October 31, 1999 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

                                      3


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 
November 1, 1999, and there are unwithdrawn Deposits on such date, the Final 
Withdrawal Date shall be deemed to be November 16, 1999.

     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 $64,114,059  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 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.

                                      4


     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 US Airways, 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.

                                      5


     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. 

     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 
Rating 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.

                                      6


     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 
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.

                                      7


     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 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.

                                      8


          (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.

     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

                                      9


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.

                                     10


     Section 5.  Representations And Warranties of The Escrow Agent.  The 
Escrow Agent represents and warrants to US Airways, the Investors, the Paying 
Agent and the Pass Through Trustee as follows:

          (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

                                     11


          (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.

     Section 6.  Representations And Warranties of The Paying Agent.  The 
Paying Agent represents and warrants to US Airways, 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;

                                     12


          (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 
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 US Airways 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

                                     13


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, 2 International Place, 4th 
Floor, Boston, MA 02110, Attention:  Corporate Trust Administration 
(Telecopier:  (617) 664-5151) 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 copy to US Airways, US Airways, Inc., 2345 Crystal 
Drive, Arlington, VA 22227, Attention:  Treasurer (Telecopier:  (703) 872-
5936) (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.

                                     14


     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.








                                     15


     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, not in its individual capacity, but 
solely as Pass Through Trustee for and on behalf of US Airways Pass Through 
Trust 1998-1B

By ______________
  Name:
  Title:



STATE STREET BANK AND TRUST COMPANY as Paying Agent

By ______________
  Name:
  Title:



FIRST SECURITY BANK, NATIONAL ASSOCIATION, as Escrow Agent 

By ______________
  Name:
  Title:



MORGAN STANLEY & CO. INCORPORATED, CREDIT SUISSE FIRST BOSTON CORPORATION and 
SALOMON SMITH BARNEY INC., as Underwriters

By:  MORGAN STANLEY & CO. INCORPORATED

By ______________
  Name:
  Title:




















                                                                   EXHIBIT A
                                                                   ---------

                      US Airways 1998-1B 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 December 14, 1998 (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"), Morgan Stanley & Co. Incorporated, 
Credit Suisse First Boston Corporation, Lehman Brothers Inc. and Salomon 
Smith Barney Inc.,  as Underwriters, State Street Bank and Trust Company, 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

                                     A-1


recourse to US Airways, 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 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:  December __, 1998

                                            FIRST SECURITY BANK, NATIONAL
                                            ASSOCIATION, as Escrow Agent



                                            By ______________________
                                               Name:
                                               Title:




                                     A-2


                                                                   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, dated as of 
December 14, 1998 (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 (212) 325-8319.

                                       Very truly yours,

                                       STATE STREET BANK AND TRUST
                                       COMPANY, not in its individual
                                       capacity but solely as Pass Through
                                       Trustee



                                            By ______________________
                                               Name:
                                               Title:
Dated: __________, ___




















                                    B-1


                        NOTICE OF PURCHASE WITHDRAWAL
                        -----------------------------


CREDIT SUISSE FIRST BOSTON
New York Branch
11 Madison Avenue
New York, NY  10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

     Reference is made to the Deposit Agreement (Class B) dated as of 
December 14, 1998 (the "Deposit Agreement") between First Security Bank, 
National Association, as Escrow Agent, and Credit Suisse First Boston, New 
York 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:___________, ____









                                    B-2





EXHIBIT 4(a)(xii)
- -------------------------------------------------------------------------


                          NOTE PURCHASE AGREEMENT

                       Dated as of December 14, 1998

                                   Among

                             US AIRWAYS, INC.,

                   STATE STREET BANK AND TRUST COMPANY
                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

- -------------------------------------------------------------------------




                      INDEX TO NOTE PURCHASE AGREEMENT

                                                                   Page

SECTION 1.  Definitions.............................................4
SECTION 2.  Financing of New Aircraft...............................4
SECTION 3.  Conditions Precedent....................................8
SECTION 4.  Representations and Warranties..........................9
SECTION 5.  Covenants..............................................14
SECTION 6.  Notices................................................15
SECTION 7.  Expenses...............................................16
SECTION 8.  Further Assurances.....................................17
SECTION 9.  Miscellaneous..........................................17
SECTION 10. Governing Law..........................................18

                                 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 B      Form of Closing Notice 
Exhibit C-1    Form of Owned Aircraft Participation Agreement 
Exhibit C-2    Form of Owned Aircraft Indenture




                          NOTE PURCHASE AGREEMENT


            This NOTE PURCHASE AGREEMENT, dated as of December 14, 1998,
among (i) US Airways, Inc., a Delaware corporation (the "Company"), (ii)
State Street Bank and Trust Company, a Massachusetts trust company, 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, US Airways Group, Inc. has obtained commitments from
the Seller pursuant to the Aircraft Purchase Agreement for the delivery of
the twenty-three (23) 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 December 4, 1998 (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 and the Class B Trust to issue and sell the Class A Certificates and
the Class B Certificates to the Underwriters;

            WHEREAS, the Company has entered into a Class C Trust
Certificate Purchase Agreement, dated as of December 14, 1998 (the "Class C
Purchase Agree ment") with Airbus Industrie Financial Services ("AIFS")
which provides that the Company will cause the Trustee of the Class C Trust
to issue and sell Class C Certificates to AIFS;

            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 and AIFS 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, AIFS, the Paying Agents and the Escrow Agents
entered into the Escrow and Paying Agent Agreements set forth in Schedule
IV hereto (the "Escrow and Paying Agent Agreements") whereby, among other
things, (a) the Underwriters and AIFS 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) ABN AMRO BANK N.V., a bank organized under the laws of the
Netherlands, acting through its Chicago branch (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 US Airways Group, Inc. has entered into the Aircraft Purchase
Agreement with the Seller pursuant to which US Airways Group, Inc. 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. US Airways
Group, Inc. has, or prior to the scheduled delivery date for the New
Aircraft will, assign the right to purchase the New Aircraft to the
Company. 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 Day's 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 included in the Financing
      Agreements 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 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 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 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. Concurrently with the giving of
such notice of postponement or subsequently, 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 re-scheduled (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 Section 5.01 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 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 Cut-Off 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 promptly thereafter give the
parties hereto a Closing Notice specifying a Closing Date not later than
thirty (30) days after the Closing Date of such New Aircraft and 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) 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 October 1, 1998 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 Substitute Aircraft, any Owner Participant
who is to be a party to any Lease Financing Agreements shall not be a
"citizen of the 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;

                  (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; and

                  (d) in the case of the Class C Trust, on any Closing Date
that occurs at a time when AIFS is the record or beneficial owner of any
Class C Certificate, the Class C Trustee shall have received a certificate
signed by the Chief Financial Officer, Treasurer or Assistant Treasurer of
the Company, to the effect that (i) all of the conditions precedent set
forth in Section 6 the Aircraft Financing Letter Agreement have been
satisfied, (ii) no "Termination Event" has occurred under Section 7 of the
Aircraft Financing Letter Agreement and (iii) the terms and conditions of
such Participation Agreement and the related Operative Documents comply
with the provisions of Section 13 of the Purchase Agreement.

            Anything herein to the contrary notwithstanding, the obligation
of each Pass Through Trustee to purchase Equipment Notes shall terminate on
the Cut-Off Date. In addition, the obligation of the Pass Through Trustee
of the Class C Trust to purchase Equipment Notes shall terminate on the
date on which a "Termination Event" under the Aircraft Financing Letter
Agreement occurs, if on such date AIFS is the record or beneficial owner of
any Class C Trust Certificate.

            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 Delaware
      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 Delaware 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 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 indenture, mortgage, contract or
      other agreement to which it is a party or by which it is bound;

                        (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; and

                           (iv)if a certificate is required to be delivered
      under Section 3(d), the statements contained therein are true
      and correct.

                  (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, Pass Through Trustee
      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, Pass
      Through Trustee 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, Pass Through Trustee 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, Pass Through Trustee 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, Pass Through Trustee 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 consid ered in a proceeding at law or in equity.

                  (c) The Pass Through Trustee hereby confirms to each of
the other parties hereto that its representations and warranties set forth
in Section 7.15 of the Basic Pass Through Trust Agreement and Section 5.04
of each Trust Supplement are true and correct as of the date hereof.

                  (d) The Subordination Agent represents and warrants that:

                           (i) the Subordination Agent is duly incorpo
      rated, 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
      registra tion with, or the taking of any other action with respect
      to, any Massa chusetts 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 Common wealth of Massachusetts or any political
      subdivision thereof in connection with the acquisition, possession or
      ownership by the Subordination Agent of any of the Equipment Notes
      (other than franchise or other taxes based on or measured by any fees
      or compensation received by the Subordina tion 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
      deter mined 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 incorporated, 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 Agree ment, 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 Common
      wealth 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
      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.

            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;

                           (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;

                           (ii) 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 7(v) of each Participation
      Agreement is hereby incorporated by reference herein; and

                           (v) on any date the Company is obligated to
      pay to the Pass Through Trustee on behalf of the Class C Trust a
      Class C Special Indemnity Payment pursuant to the Participation
      Agreement, the Company shall pay to the Pass Through Trustee on behalf 
      of the Class C Trust the amount which has accrued during such Lease 
      Period (as defined in the Participation Agreement) in accordance with 
      the following sentence and which remains unpaid on such date (such
      amount, the "Class C Special Deposit Payment"). The Class C Special
      Deposit Payment shall accrue during each Lease Period at a daily rate
      equal to the Multiplier, in effect from time to time during such
      Lease Period, multiplied by the aggregate principal amount of the
      Deposit on such date divided by 360. The Pass Through Trustee agrees
      that it will accept and receive the Class C Special Deposit Payment
      on behalf of the Class C Trust and that it will distribute the Class
      C Special Deposit Payment in accordance with the Class C Trust.

            (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 8.02 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 telecommu nication, 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 and
the related Fee Letter (as defined in the Intercreditor Agreement)
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 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 Agree ments.

                  (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), the terms "Applied
Non-Extension Advance," "Downgrade Advance", "Investment Earnings" and
"Non-Extension Advance" shall have the meanings specified in each Liquidity
Facility.


            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, 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, AIFS
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, AIFS 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.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.]



            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.

                              US AIRWAYS, INC.



                              By:                                    
                                   Name:
                                   Title:

                                   Address:   2345 Crystal Drive,
                                              Arlington, VA 22227
                                   Attention:  Treasurer
                                   Facsimile:  703-872-5936

                              STATE STREET BANK AND TRUST COM PANY, not in
                              its individual capacity, except as otherwise
                              provided herein, but solely as Pass Through
                              Trustee



                              By:                                    
                                   Name:
                                   Title:

                              Address: 2 International Place, 4th
                                       Floor
                                       Boston, MA  02110
                              AttentionCorporate Trust
Administration
                              Facsimile617-664-5151


                                 19

<PAGE>



                              STATE STREET BANK AND TRUST COM PANY, not in
                              its individual capacity, except as otherwise
                              provided herein, but solely as Subordi nation
                              Agent



                              By:                                    
                                   Name:
                                   Title:

                              Address: 2 International Place, 4th
                                       Floor
                                       Boston, MA  02110
                              AttentionCorporate Trust
Administration
                              Facsimile617-664-5151

                              FIRST SECURITY BANK, NATIONAL ASSO
                              CIATION, as Escrow Agent



                              By:                                    
                                   Name:
                                   Title:

                              Address: 79 South Main Street
                                       Salt Lake City, UT 84111
                              AttentionCorporate Trust Department
                              Facsimile801-246-5053


                                 20

<PAGE>



                              STATE STREET BANK AND TRUST COM
                              PANY, as Paying Agent



                              By:                                    
                                   Name:
                                   Title:

                              Address: 2 International Place, 4th
                                       Floor
                                       Boston, MA  02110
                              AttentionCorporate Trust
Administration
                              Facsimile617-664-5151




                                 21

<PAGE>



                               SCHEDULE I to
                          NOTE PURCHASE AGREEMENT

              NEW AIRCRAFT AND SCHEDULED CLOSING MONTHS


   New Aircraft        Expected       Manufacturer's       Scheduled
       Type        Registration Number Serial Number    Delivery Months

Airbus A319        N700UW            0885              October 15, 1998
Airbus A319        N701UW            0890              October 20, 1998
Airbus A319        N702UW            0896              November 2, 1998
Airbus A319        N703UW            0904              November 10, 1998
Airbus A319        N704US            0922              December 1998
Airbus A319        N705UW            0929              December 1998
Airbus A320        N101UW            0936              January 1999
Airbus A319        N706US            0946              January 1999
Airbus A319        N707UW            0949              January 1999
Airbus A319        N708UW            0972              February 1999
Airbus A319        N709UW            0997              March 1999
Airbus A320        N102UW            0844              May 1999
Airbus A320        N103US            0861              May 1999
Airbus A319        N710UW            1019              May 1999
Airbus A320        N104UW            0863              June 1999
Airbus A320        N105UW            0868              June 1999
Airbus A319        N711UW            1033              June 1999
Airbus A319        N712US            1038              June 1999
Airbus A320        N106US            1044              July 1999
Airbus A319        N713UW            1040              July 1999
Airbus A319        N714US            1046              July 1999
Airbus A319        N715UW            1051              July 1999
Airbus A319        N716UW            1055              July 1999



                                  Sch. I-1

<PAGE>



                               SCHEDULE II to
                          NOTE PURCHASE AGREEMENT

                             TRUST SUPPLEMENTS


            Trust Supplement dated as of the Issuance Date between
the Company
and the Pass Through Trustee in respect of US Airways Pass Through
Trust, Series
1998-1A.

            Trust Supplement dated as of the Issuance Date between
the Company
and the Pass Through Trustee in respect of US Airways Pass Through
Trust, Series
1998-1B.

            Trust Supplement dated as of the Issuance Date between
the Company
and the Pass Through Trustee in respect of US Airways Pass Through
Trust, Series
1998-1C.





                                 Sch. II-2

<PAGE>



                              SCHEDULE III to
                          NOTE PURCHASE AGREEMENT

                             DEPOSIT AGREEMENTS


            Deposit Agreement (Class A) dated as of the Issuance
Date between
Credit Suisse First Boston, New York Branch and the Escrow Agent.

            Deposit Agreement (Class B) dated as of the Issuance
Date between
Credit Suisse First Boston, New York Branch and the Escrow Agent.

            Deposit Agreement (Class C) dated as of the Issuance
Date between
Citibank, N.A. and the Escrow Agent.





                                 Sch. III-1

<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, AIFS, the Pass Through Trustee and the
Paying Agent.




                                 Sch. IV-1

<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, the rights of US
Airways under the Aircraft Purchase Agreement to the extent assigned under
the Indenture 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 Subordina tion 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, 10.04, 10.11 or 10.12 of the Trust Indenture
Form for the Leased Aircraft or Article II or III or Sections 4.02, 4.03,
4.04, 5.02, 5.06, 10.01, 11.04, 11.11 or 11.12 of the Trust 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(c)(v), the
proviso to the first sentence of Section 3(e), 7(a)(1)(A), clause (6) of
the final paragraph of Section 10(a), 18, 21, the penultimate sentence of
Section 25 or Section 27 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)(xi) to the extent such section requires
special counsel for the Lessee to deliver an opinion relating to Section
1110 of the Bankruptcy Code, Section 7(c), 7(h), the second sentence of
Section 7(n), 7(q), 7(z), 14(f) or 14(h) 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 of the provisions of Section 7(d)(II)(E)
of the Participation Agreement Form as regards the rights of the Indenture
Trustee thereunder or otherwise modify the terms of the Participation
Agreement Form to deprive the Trustees, the Subordination Agent, the
Liquidity Provider or the Indenture Trustee of any indemnity or right of
reimbursement in its favor for Expenses or Taxes.





<PAGE>



            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
Annex A to the Participation Agreement Form.

            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.




<PAGE>



                               SCHEDULE VI to
                          NOTE PURCHASE AGREEMENT

                          MANDATORY ECONOMIC TERMS


                              EQUIPMENT NOTES

Obligor:  US Airways, Inc. or an Owner Trust

Maximum Principal Amount:

            The principal amount of the Series A Equipment Notes and Series
B Equipment Notes issued with respect to an Aircraft shall equal the
principal amount of Series A Equipment Notes and Series B 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 "Principal Amount of Series A Equipment Notes" and "Principal
Amount of Series B Equipment Notes," respectively.

            The maximum principal amount of the Series C Equipment Notes
issued with respect to an Aircraft shall not exceed the principal amount of
Series C Equipment Notes indicated for each Aircraft as set forth in
"Prospectus
Supplement Summary--
Equipment Notes and Aircraft" under the column "Maximum Principal
Amount of Series
C 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 40.5%
            Series B: not in excess of 51.0%
            Series C: not in excess of 67.0%

            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) 40.5% in the
case of the Series A Equipment Notes, 51.0% in the case of the Series B
Equipment Notes and 69.5% in the case of the Series C Equipment Notes.



                                 Sch. VI-1

<PAGE>



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 13.5 years, 12.5 years and 13.5 years, respectively, from the
Issuance
Date.

                          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, respectively, 13.0 years, 11.0 years
and 12.5 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

      Series A Certificates:  January 30, 2018
      Series B Certificates:  January 30, 2018
      Series C Certificates:  July 30, 2014

Past Due Rate:    Debt Rate plus 2% per annum.

Payment Dates:    January 30 and July 30, commencing January 30, 1999

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").

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.

                                   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:     January 30, 1999 and each succeeding January
                        30 and
                        July 30, to and including the last such date
                        in the Term.



                                 Sch. VI-2

<PAGE>



Minimum Rent:           Basic Rent 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
                        principal amount of the related Equipment
                        Notes together
                        with accrued interest thereon.

All-risk                hull insurance:Not less than Termination Value,
                        subject to Lessee's right to self-insure on terms
                        no more favorable to Lessee in any material respect
                        than those set forth in
                        Section 2(d) of Exhibit H to the Lease Form.

Minimum Liability
Insurance Amount:       As set forth in Exhibit H to the Lease Form.

Past Due Rate:          As set forth in Exhibit B to the Lease Form.


                          PARTICIPATION AGREEMENT

      Indenture Trustee, Subordination Agent, Liquidity Provider, Pass
Through Trustees, Escrow Agents and Note Holders shall be indemnified
against Expenses and Taxes in a manner no less favorable to the Loan
Trustees, the Subordination Agent, the Liquidity Provider, the Trustees,
the Escrow Agents and the Note Holders than that set forth in Section 6 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


                               [INSERT TABLE]




                               Schedule VII-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.

            "AIFS" has the meaning set forth in the fourth recital
to the Note
Purchase Agreement.

            "Aircraft Financing Letter Agreement" means the Aircraft
Financing Letter Agreement, dated as of October 31, 1997 between AVSA,
S.A.R.L., the
Company and US Airways Group, Inc..

            "Aircraft Purchase Agreement" means the Purchase Agreement
dated as of October 31, 1997, between US Airways Group, Inc. and the Seller
(including all exhibits thereto, together with all letter agreements
entered into that by their terms constitute part of any such Purchase
Agreement).

            "Aircraft Purchase Agreement Assignment" means a
Purchase Agreement
substantially in the form of Exhibit A-4-I 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 December 4, 1998, between the Company and Pass
Through Trustee, as such agreement may be supplemented, amended or
modified, but does not include any Trust Supplement.



                                 Annex A-1

<PAGE>



            "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, Pittsburgh, Pennsylvania, Boston,
Massachusetts or Salt
Lake City, Utah.

            "Certificate" has the meaning set forth in the second
recital to the Note
Purchase Agreement.

            "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 US Airways Pass Through Trust, Series 1998-1A.

            "Class B Certificates" means the Class B Certificates issued by
the US Airways Pass Through Trust, Series 1998-1B.

            "Class C Certificates" means the Class C Certificates issued by
the US Airways Pass Through Trust, Series 1998-1C.

            "Class C Purchase Agreement" has the meaning set forth
in the fourth
recital to the Note Purchase Agreement.

            "Class A Trust" means the US Airways Pass Through Trust, Series
1998- 1A formed pursuant to the Basic Pass Through Trust Agreement and
Class A Trust Supplement.

            "Class B Trust" means the US Airways Pass Through Trust, Series
1998- 1B formed pursuant to the Basic Pass Through Trust Agreement and
Class B Trust Supplement.

            "Class C Special Deposit Payment" has the meaning set
forth in Section
5(a) hereof.

            "Class C Special Indemnity Payment" has the meaning set
forth in each
Participation Agreement.

            "Class C Trust" means the US Airways Pass Through Trust, Series
1998- 1C formed pursuant to the Basic Pass Through Trust Agreement and
Class C Trust Supplement.

            "Closing Date" means the Business Day on which a closing occurs
under the Financing Agreements.


                                 Annex A-2

<PAGE>



            "Company" means US Airways, Inc., a Delaware
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)
October 31, 1999 and (b) the date on which Equipment Notes issued with
respect to all of the New Aircraft (or Substitute Aircraft in lieu thereof)
have been purchased by the Pass Through Trustees in accordance with the
Note Purchase Agreement.

            "Deposit" has the meaning set forth in the fifth recital
to the Note
Purchase Agreement.

            "Deposit Agreement" has the meaning set forth in the
fifth recital to the
Note Purchase Agreement.

            "Deposit Make-Whole Premium" means, with respect to the
distribution of unused Deposits to holders of any Class of Certificates, as
of any date of determina tion, 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 and, in the case of the Class C Certificates, the Par
Redemption Amount (without duplication), 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 225 basis points in the case
of the Class A Certificates, 275 basis points in the case of the Class B
Certificates and 222 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 and, in the case of the
Class C Certificates, the Par Redemption Amount (without duplication) 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 (a) with respect to Deposits made by the
Underwrit ers on behalf of the Escrow Agent, Credit Suisse First Boston,
New York Branch, a banking institution organized under the laws of
Switzerland acting through its New York Branch and (b) with respect to
Deposits made by AIFS on behalf of the Escrow Agent, Citibank, N.A., a
national banking association.

            "Equipment Notes" means and includes any equipment notes issued
under any Indenture in the form specified in Section 2.01 thereof (as such
form may be varied


                                 Annex A-3

<PAGE>



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
fifth recital 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.

            "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.

            "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.

            "Indentures" means, collectively, the Leased Aircraft
Indentures and the
Owned Aircraft Indentures.

            "Intercreditor Agreement" has the meaning set forth in
the ninth recital
to the Note Purchase Agreement.

            "Issuance Date" means the date of the original issuance
of the Certifi
cates.

            "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.



                                 Annex A-4

<PAGE>



            "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 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.

            "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
ninth recital to the
Note Purchase Agreement.

            "Liquidity Provider" has the meaning set forth in the
ninth recital 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 Airbus Industrie, a "Groupement
d'Interet
Economique" established under "Ordonnance" No. 67-821 dated
September 23, 1967,
of the Republic of France.


            "Multiplier" has the meaning set forth in each
Participation Agreement.

            "New Aircraft" has the meaning set forth in the first
recital to the Note
Purchase Agreement.

            "Non-Premium Amount" means the amount equal to unused Deposits
to be distributed due to the failure of an Aircraft to be delivered prior
to the Delivery Period Termination Date due to any reason not occasioned by
US Airways'
fault or negligence.
Deposits comprising Non-Premium Amounts will not be treated as unused
Deposits in determining whether the unused Deposits exceed the Par
Redemption
Amount.



                                 Annex A-5

<PAGE>



            "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.

            "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
Trust Agreements, the Equipment Notes, the Certificates and the Financing
Agreements.

            "Owned Aircraft" means a New Aircraft subject to an
Owned Aircraft
Indenture.

            "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 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.

            "Par Redemption Amount" means (x) in the case where the unused
Deposits are returned due to the fault or negligence of US Airways, $0 and
(y) in all
other cases $15,000,000.

            "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
second recital to
the Note Purchase Agreement.



                                 Annex A-6

<PAGE>



            "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" has the meaning set forth
in Annex A to
the Participation Agreement.

            "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. 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
Substitute Aircraft, a written confirmation from each of the Rating
Agencies that the use of such Financing Agreement with such modifications
or the substituting of such Substitute Aircraft for a New Aircraft,
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 7.12 of the Basic Pass Through Trust Agreement with respect to
each Pass Through
Trust.

            "Regular Distribution Dates" shall mean January 30 and
July 30 of each year, commencing January 30, 1999.

            "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


                                 Annex A-7

<PAGE>



payment due on the maturity of such Equipment Note by (ii) the number of
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.

            "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., a societe a responsabilite
limitee organized and existing under the laws of the Republic of France.

            "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.

            "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


                                 Annex A-8

<PAGE>



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.

            "Underwriters" has the meaning set forth in the fourth
recital to the Note
Purchase Agreement.




                                 Annex A-9

<PAGE>



                                EXHIBIT A-1
                          NOTE PURCHASE AGREEMENT

          FORM OF LEASED AIRCRAFT PARTICIPATION AGREEMENT



                                 Exh. A-1-1

<PAGE>



                               EXHIBIT A-2 to
                          NOTE PURCHASE AGREEMENT

                               FORM OF LEASE







                                 Exh. A-2-1

<PAGE>



                               EXHIBIT A-3 to
                          NOTE PURCHASE AGREEMENT

                     FORM OF LEASED AIRCRAFT INDENTURE







                                 Exh. A-3-1

<PAGE>



                              EXHIBIT A-4-I to
                          NOTE PURCHASE AGREEMENT

           FORM OF AIRCRAFT PURCHASE AGREEMENT ASSIGNMENT




                                Exh. A-4-I-1

<PAGE>



                               EXHIBIT A-5 to
                          NOTE PURCHASE AGREEMENT

               FORM OF LEASED AIRCRAFT TRUST AGREEMENT




                                Exh. A-4-I-2

<PAGE>



                                EXHIBIT B to
                          NOTE PURCHASE AGREEMENT

                           FORM OF CLOSING NOTICE





                                  Exh. B-1

<PAGE>



                                                                  EXHIBIT B
                                                             Closing Notice


      Dated as of __________


To each of the addressees listed
 in Schedule A hereto

            Re:   Closing Notice in Accordance with Note Purchase 
                  Agreement
                  Referred to below

Gentlemen:

            Reference is made to the Note Purchase Agreement, dated as of
December 14, 1998 among US Airways, Inc. (the "Company"), State Street Bank
and Trust Company, as Pass Through Trustee under each of the Pass Through
Trust Agreements (as defined therein) (the "Pass Through Trustee"), State
Street Bank and Trust Company, as Subordination Agent (the "Subordination
Agent"), First Security Bank, National Association, as Escrow Agent (the
"Escrow Agent") and State Street Bank and Trust Company, as Paying Agent
(the "Paying Agent") (as in effect from time to time, the "Note Purchase
Agreement"). Unless otherwise defined herein, capitalized terms used herein
shall have the meanings set forth in the Note Purchase Agreement or, to the
extent not defined therein, the Intercreditor Agreement.

            Pursuant to Sections 2(b) of the Note Purchase Agreement, the
undersigned hereby notifies you, in respect of the Airbus __________
aircraft with manufacturer's serial number __________ (the "Aircraft"), of
the following:

            1.    The Company has elected to treat the Aircraft as
[a Leased
Aircraft] [an Owned Aircraft];

            2. The Scheduled Closing Date of the Aircraft is __________;
and

            3. The aggregate amount of each series of Equipment Notes to be
issued, and purchased by the respective Pass Through Trustees, on the
Closing Date, in connection with the financing of such Aircraft is as
follows: The Class A Trustee shall purchase Series A Equipment Notes in the
amount of $__________, the Class B Trustee shall purchase Series B
Equipment Notes in the amount of $__________ and the Class C Trustee shall
purchase Series C Equipment Notes in the amount of
$--------.

            The Company hereby instructs the Class A Trustee to (i) execute
a Withdrawal Certificate in the form of Annex A hereto dated as of
__________ and attach thereto a Notice of Purchase Withdrawal dated such
date completed as set forth


                                  Exh. B-2

<PAGE>



on Exhibit A hereto and (ii) deliver such Withdrawal Certificate and
Notice of Purchase
Withdrawal to the applicable Escrow Agent.

            The Company hereby instructs the Class B Trustee to (i) execute
a Withdrawal Certificate in the form of Annex A hereto dated as of
__________ and attach thereto a Notice of Purchase Withdrawal dated such
date completed as set forth on Exhibit B hereto and (ii) deliver such
Withdrawal Certificate and Notice of Purchase Withdrawal to the applicable
Escrow Agent.

            The Company hereby instructs the Class C Trustee to (i) execute
a Withdrawal Certificate in the form of Annex A hereto dated as of
__________ and attach thereto a Notice of Purchase Withdrawal dated such
date completed as set forth on Exhibit C hereto and (ii) deliver such
Withdrawal Certificate and Notice of Purchase Withdrawal to the applicable
Escrow Agent.

            The Company hereby instructs each Pass Through Trustee to (i)
purchase Equipment Notes of a series and in an amount set forth opposite
such Pass Through Trustee in clause (3) above with a portion of the
proceeds of the withdrawals of Deposits referred to in the applicable
Notice of Purchase Withdrawal referred to above and (ii) redeposit with the
Depositary the excess, if any, of the amount so withdrawn over the purchase
price of such Equipment Notes.

            The Company hereby instructs each Pass Through Trustee to (a)
enter into the Participation Agreement dated as of __________ among the
Company, as Lessee, the Subordination Agent, the Pass Through Trustee,
State Street Bank and Trust Company, as Indenture Trustee and Loan
Participant, First Security Bank, National Association, as Owner Trustee
and __________, as Owner Participant, (b) perform its obligations
thereunder and (c) deliver such certificates, documents and legal opinions
relating to such Pass Through Trustee as required thereby.


                                  Exh. B-3

<PAGE>



            The Company hereby certifies that the Owner Participant with
respect to the Aircraft is not an Affiliate of the Company.

                                    Yours faithfully,

                                    US Airways, Inc.



                                    By:                              
                                       Name:
                                       Title:



                                  Exh. B-4

<PAGE>



                                 SCHEDULE A




State Street Bank and Trust Company, as
Pass Through Trustee, Subordination
Agent and Paying Agent
2 International Place, 4th Floor
Boston, MA  02110
Attention: Corporate Trust Administration
Facsimile:  (617) 664-5151

First Security Bank, National Association,
as Escrow Agent
79 South Main Street
Salt Lake City, UT 84111
Attention: Corporate Trust Department
Facsimile: (801) 246-5053

Standard & Poor's Ratings Services
26 Broadway, 14th Floor
New York, New York 10004
Attention: Philip Baggaley
Facsimile: (212) 412-0540

Moody's Investors Service, Inc.
99 Church Street
New York, New York 10007
Attention: Monica Rodriguez
Facsimile: (212) 553-4600



                                  Sch. A-1

<PAGE>



                                                                    Annex A

                           WITHDRAWAL CERTIFICATE




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,
dated as of December 14, 1998 (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 __________.

            Capitalized terms used herein but not defined herein shall have
the meanings set forth in the Agreement.

                              Very truly yours,

                              STATE STREET BANK AND TRUST COM PANY, not in
                              its individual capacity by solely as Pass
                              Through Trustee



                              By:                                    
                                   Name:
                                   Title:


Dated: As of __________


                                 Annex A-1

<PAGE>



                                                                  Exhibit A


                       NOTICE OF PURCHASE WITHDRAWAL


CREDIT SUISSE FIRST BOSTON New York Branch 11 Madison Avenue New York, NY
10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

         Reference is made to the Deposit Agreement (Class A) dated
as of December
14, 1998 (the "Deposit Agreement") between First Security Bank,
National Association,
as Escrow Agent, and Credit Suisse First Boston, New York 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:___________, ____


                                  Exh. A-1

<PAGE>



                                                                  Exhibit B


                       NOTICE OF PURCHASE WITHDRAWAL


CREDIT SUISSE FIRST BOSTON New York Branch 11 Madison Avenue New York, NY
10010
Attention:  Robert Finney and Jennifer Toth
Telecopier:  (212) 325-8319

Ladies and Gentlemen:

         Reference is made to the Deposit Agreement (Class B) dated
as of December
14, 1998 (the "Deposit Agreement") between First Security Bank,
National Association,
as Escrow Agent, and Credit Suisse First Boston, New York 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:___________, ____


                                  Exh. B-1

<PAGE>



                                                                  Exhibit C


                       NOTICE OF PURCHASE WITHDRAWAL


CITIBANK, N.A.
450 Mamaroneck Avenue, 3rd Floor
Harrison, NY 10528
Attention:  Tara Ramnarine
Telecopier:  914-899-7163

Ladies and Gentlemen:

         Reference is made to the Deposit Agreement (Class C) dated
as of December
14, 1998 (the "Deposit Agreement") between First Security Bank,
National Association,
as Escrow Agent, and Citibank, N.A., 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:___________, ____


                                  Exh. C-1

<PAGE>



                               EXHIBIT C-1 to
                          NOTE PURCHASE AGREEMENT

           FORM OF OWNED AIRCRAFT PARTICIPATION AGREEMENT

                             [FILED SEPARATELY]


                                 Exh. C-1-1

<PAGE>


                               EXHIBIT C-2 to
                          NOTE PURCHASE AGREEMENT

                      FORM OF OWNED AIRCRAFT INDENTURE

                             [FILED SEPARATELY]



                                 Exh. C-2-1

<PAGE>


 


EXHIBIT 4(a)(xiii)
                                                    Participation Agreement 
                                                                     N7__UW


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


                             PARTICIPATION AGREEMENT
                       (US Airways, Inc. Trust No. N7__UW) 

                                   Dated as of
                               _________  __, 199_ 

                                      Among

                                 US AIRWAYS, INC., 
                                      Lessee, 

                              [__________________], 
                                Owner Participant, 

                       STATE STREET BANK AND TRUST COMPANY
                      not in its individual capacity except 
                   as expressly provided herein, but solely as 
                      Pass Through Trustee under each of the  
                           Pass Through Trust Agreements, 
                    Subordination Agent and Indenture Trustee 

                                       and

                    FIRST SECURITY BANK, NATIONAL ASSOCIATION, 
                         not in its individual capacity 
                       except as expressly provided herein, 
                           but solely as Owner Trustee, 

                            -------------------------

                            One Airbus A319 Aircraft  
                          U.S. Registration No. N7__UW 


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



                        INDEX TO PARTICIPATION AGREEMENT

                                                                         Page
                                                                         ----

      SECTION 1.     DEFINITIONS AND CONSTRUCTION. . . . . . . . . . . . . 2

      SECTION 2.     PARTICIPATIONS IN LESSOR'S COST OF THE AIRCRAFT . . . 3
                     (a)  Participation by Pass Through Trustees 
                          on the Delivery Date; Issuance of 
                          Equipment Notes . . . . . . . . . . . . . . . .  3
                     (b)  Payment of Owner Participant's Commitment . . .  3
                     (c)  Lessee's Notice of Delivery Date . . . . . . . . 4
                     (d)  Default by Pass Through Trustee or Owner 
                          Participant . . . . . . . . . . . . . . . . . .  4
                     (e)  Closing  . . . . . . . . . . . . . . . . . . . . 4
                     (f)  Postponement of Scheduled Closing Date  . . . .  4

      SECTION 3.       INSTRUCTIONS TO THE OWNER TRUSTEE . . . . . . . . . 6

      SECTION 4.     CONDITIONS PRECEDENT. . . . . . . . . . . . . . . . . 6
                     (a)  Conditions Precedent to the Participations 
                          in the Aircraft . . . . . . . . . . . . . . . .  6
                     (b)  Conditions Precedent to the Obligations 
                          of Lessee . . . . . . . . . . . . . . . . . . . 16

      SECTION 5.     EXTENT OF INTEREST OF CERTIFICATE HOLDERS . . . . .  18

      SECTION 6.     REPRESENTATIONS AND WARRANTIES OF LESSEE; 
                     INDEMNITIES . . . . . . . . . . . . . . . . . . . .  18
                     (a)  Representations and Warranties  . . . . . . . . 18
                     (b)  General Tax Indemnity . . . . . . . . . . . . . 22
                          (i)    Indemnity  . . . . . . . . . . . . . . . 22
                          (ii)   Exclusions from General Tax Indemnity  . 23
                          (iii)  Payments. . . . . . . . . . . . . . . .  26
                          (iv)   Contests.    . . . . . . . . . . . . . . 28
                          (v)    Refund.  . . . . . . . . . . . . . . . . 31
                                 (vi) Tax Filing.   . . . . . . . . . . . 31
                                 (vii)  Forms.   . . . . . . . . . . . .  32
                                 (viii) Non-Parties  . . . . . . . . . .  32
                          (ix)   Subrogation. . . . . . . . . . . . . . . 32
                                 (x)  Foreign Tax On Loan Payments. . . . 32
                                 (xi) Income Tax  . . . . . . . . . . . . 33
                     (c)  General Indemnity . . . . . . . . . . . . . . . 33
                     (d)  Special Indemnity . . . . . . . . . . . . . . . 39

      SECTION 7.     REPRESENTATIONS, WARRANTIES AND COVENANTS.. . . . .  38
                     (a)  Covenants Regarding Citizenship.  . . . . . . . 38
                     (b)  Location of Records . . . . . . . . . . . . . . 39
                     (c)  Securities Act  . . . . . . . . . . . . . . . . 39
                     (d)  Reregistration  . . . . . . . . . . . . . . . . 39
                     (e)  Owner Participant Representations and 
                          Warranties . . . . . . . . . . . . . . . . . .  42
                     (f)  Lessor Liens  . . . . . . . . . . . . . . . . . 44
                     (g)  Quiet Enjoyment . . . . . . . . . . . . . . . . 44
                     (h)  Equipment Notes Acquired for Investment . . . . 44
                     (i)  . . . . . . . . . . . . . . . . . . . . . . . . 44
                     (j)  Representations, Warranties and Covenants 
                          of Indenture Trustee . . . . . . . . . . . . .  45
                     (k)  Owner Participant Transfers . . . . . . . . . . 46
                     (l)   Reserved . . . . . . . . . . . . . . . . . . . 48
                     (m)  Compliance with Trust Indenture . . . . . . . . 48
                     (n)  [ERISA Matters  . . . . . . . . . . . . . . . . 48
                     (o)  Confidentiality of Purchase Agreement . . . . . 49
                     (p)  Margin Regulations  . . . . . . . . . . . . . . 49
                     (q)  Loan Participant Liens  . . . . . . . . . . . . 49
                     (r)  Indenture Trustee Liens . . . . . . . . . . . . 50
                     (s)  Representations and Warranties of Owner 
                          Trustee . . . . . . . . . . . . . . . . . . . . 50
                     (t)  Owner Participant Obligations on Lease 
                          Termination . . . . . . . . . . . . . . . . . . 54
                     (u)  Transfer of Title; Assumption of Equipment 
                          Notes  . . . . . . . . . . . . . . . . . . . .  54
                     (v)   Lessee Merger Covenant . . . . . . . . . . . . 55
                     (w)  Further Assurances  . . . . . . . . . . . . . . 56
                     (x)  Rent Adjustments  . . . . . . . . . . . . . . . 57
                     (y)  Owner Participant Costs on Return . . . . . . . 57
                     (z)  Transfer of Equipment Notes . . . . . . . . . . 57
                     (aa) Representations and Warranties of Pass 
                          Through Trustee . . . . . . . . . . . . . . . . 57
                     (bb) Representations and Warranties of 
                          Subordination Agent . . . . . . . . . . . . . . 60

      SECTION 8.     RELIANCE OF LIQUIDITY PROVIDER  . . . . . . . . . .  62

      SECTION 9.     OTHER DOCUMENTS . . . . . . . . . . . . . . . . . .  62

      SECTION 10.    CERTAIN COVENANTS OF LESSEE . . . . . . . . . . . .  63
                     (a)  Further Assurances  . . . . . . . . . . . . . . 63
                     (b)  Filings . . . . . . . . . . . . . . . . . . . . 63

      SECTION 11.    OWNER FOR FEDERAL TAX PURPOSES . . . . . . . . . . . 64

      SECTION 12.    NOTICES; CONSENT TO JURISDICTION  . . . . . . . . .  64
                     (a)  Notices . . . . . . . . . . . . . . . . . . . . 64
                     (b)  Consent to Jurisdiction . . . . . . . . . . . . 64

      SECTION 13.     CHANGE OF SITUS OF OWNER TRUST . . . . . . . . . .  65

      SECTION 14.    MISCELLANEOUS . . . . . . . . . . . . . . . . . . .  66
                     (a)  Consents Under Lease  . . . . . . . . . . . . . 66
                     (b)  Survival  . . . . . . . . . . . . . . . . . . . 66
                     (c)  Counterparts  . . . . . . . . . . . . . . . . . 66
                     (d)  Amendments and Waivers  . . . . . . . . . . . . 67
                     (e)  Successors and Assigns  . . . . . . . . . . . . 67
                     (f)  Governing Law . . . . . . . . . . . . . . . . . 67
                     (g)  Trust Capacity  . . . . . . . . . . . . . . . . 67
                     (h)  Section 1110  . . . . . . . . . . . . . . . . . 68

      SECTION 15.    EXPENSES. . . . . . . . . . . . . . . . . . . . . .  68
                     (a)  Invoices And Payment  . . . . . . . . . . . . . 68
                     (b)  Payment of Other Expenses.  . . . . . . . . . . 68

      SECTION 16.    REFINANCINGS . . . . . . . . . . . . . . . . . . . . 69
                     (a)  Refinancing Generally  . . . . . . . . . . . .  69
                     (b)  Limitation on Redemption  . . . . . . . . . . . 72



                                     ANNEXES

 ANNEX A - Definitions 

                                   SCHEDULES

 SCHEDULE I   - Names and Addresses 
 SCHEDULE II  - Commitments 
 SCHEDULE III - Pass Through Trust Agreement and Pass Through Trust 
                Supplements


                                  EXHIBITS 

 Exhibit A   - Schedule of Countries Authorized for Reregistration 
 Exhibit B-1 - Form of Opinion of Skadden, Arps, Slate, Meagher & Flom
               (Illinois), special counsel for Lessee 
 Exhibit B-2 - Form of Opinion of Skadden, Arps, Slate, Meagher & Flom LLP,
               special counsel for Lessee 
 Exhibit B-3 - Form of Opinion of Lessee's Legal Department  
 Exhibit C-1 - Form of Opinion of                   , special counsel for 
               the Manufacturer and the Seller 
 Exhibit C-2 - Form of Opinion of Manufacturer's Legal Department 
 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., special FAA Counsel 
 Exhibit G   - Form of Opinion of Bingham Dana LLP, special counsel for the
               Indenture Trustee 
 Exhibit H   - Form of Opinion of Bingham Dana LLP, special counsel for the
               Pass Through Trustee 
 Exhibit I   - Form of Opinion of Bingham Dana LLP, special counsel for the
               Subordination Agent



                             PARTICIPATION AGREEMENT
                      (US Airways, Inc. Trust No. N7__UW) 

           THIS PARTICIPATION AGREEMENT (US Airways, Inc. Trust No. N7__UW)
 dated as of _______ ___, 199_ (as amended, supplemented or otherwise
 modified from time to time, this "Agreement") among (i) US AIRWAYS, INC., a
 Delaware corporation (together with its successors and permitted assigns,
 the "Lessee", (ii) [_______________],  a ______________ (together with its
 successors and permitted assigns, the "Owner Participant"), (iii) STATE
 STREET BANK AND TRUST COMPANY, a Massachusetts trust company, as pass
 through trustee under each of three separate Pass Through Trust Agreements
 (in such capacity, together with its successors and permitted assigns, the
 "Pass Through Trustee"), subordination agent and trustee under the
 Intercreditor Agreement (in such capacity, together with its successors and
 permitted assigns, the "Subordination Agent"), and Indenture Trustee under
 the Trust Indenture (in such capacity, together with any successor
 indenture trustee, the "Indenture Trustee"), and (iv) 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");

                            W I T N E S S E T H:

           WHEREAS, prior to the execution and delivery of this Agreement,
 the Owner Participant is entering into the Trust Agreement with the Owner
 Trustee, pursuant to which Trust Agreement the Owner Trustee agrees, among
 other things, to hold the Trust Estate for the use and benefit of the Owner
 Participant; 

           WHEREAS, concurrently with the execution and delivery of this
 Agreement, the Indenture Trustee and the Owner Trustee are entering into
 the Trust Indenture pursuant to which the Owner Trustee will issue to the
 Loan Participants Equipment Notes in three series, which Equipment Notes
 are to be secured by the mortgage and security interests created by the
 Owner Trustee in favor of the Indenture Trustee;  

           WHEREAS, concurrently with the execution and delivery of this
 Agreement, the Owner Trustee will execute and deliver a Trust and Indenture
 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 
 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 Delivery Date; 

           WHEREAS, on the Delivery Date for the Aircraft, the Lessee will
 deliver a Lease Supplement covering the Aircraft; 

           WHEREAS, pursuant to the Note Purchase Agreement, the Pass
 Through Trustee will purchase from the Owner Trustee on the Delivery Date,
 on behalf of each Pass Through Trust, all of the Equipment Notes bearing
 the same interest rate as the Certificates issued by such Pass Through
 Trust; 

           WHEREAS, prior to the execution and delivery of this Agreement,
 (i) the Liquidity Provider entered into three separate Liquidity
 Facilities, one for the benefit of the holders of Certificates of each of
 the Class A Pass Through Trust, the Class B Pass Through Trust and the
 Class C Pass Through Trust (each referenced on Schedule III hereto), 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; 

           WHEREAS, the Equipment Notes will be held by the Subordination
 Agent pursuant to the Intercreditor Agreement on behalf of the Pass Through
 Trusts;  

           WHEREAS, the acquisition of the Aircraft by Lessee from the
 Seller and the aforementioned sale and leaseback transaction are integrally
 related and constitute a series of events designed to provide financing for
 such Aircraft and a means of providing the Aircraft to the Lessee for use
 in its business. 

           NOW, THEREFORE, in consideration of the mutual agreements herein
 contained, the parties hereto agree as follows: 

      SECTION 1.     DEFINITIONS AND CONSTRUCTION.

           Capitalized terms used but not defined herein shall have the
 respective meanings set forth or incorporated by reference, and shall be
 construed and interpreted in the manner described, in Annex A. 

      SECTION 2.     PARTICIPATIONS IN LESSOR'S COST OF THE AIRCRAFT.

           (a)  Participation by Pass Through Trustees on the Delivery Date;
 Issuance of Equipment Notes.  Subject to the terms and conditions of this
 Agreement, the Pass Through Trustee for each Pass Through Trust agrees to
 make a non-recourse (except as provided herein) secured loan to the Owner
 Trustee on the Delivery Date 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 Equipment Notes 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(c) 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. 011-00-0028, Account No. 9903-
 990-1, Reference:  US Airways, Inc. 1998-1 EETC/US Airways, Inc.  Trust No. 
 N7__UW), 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, Equipment
 Notes of the maturity and aggregate principal amount, bearing the interest
 rate and for the purchase price set forth on Schedule II  opposite the name
 of such Pass Through Trust.

           (b)  Payment of Owner Participant's Commitment.  Subject to the
 terms and conditions of this Agreement, the Owner Participant agrees with
 the Lessee and only with the Lessee on behalf of the Owner Trustee, subject
 to the terms and conditions of this Agreement, to make the amount of its
 Commitment as set forth on Schedule II available for and on account of the
 Owner Trustee on the Delivery Date specified in the Delivery Notice
 pursuant to Section 2(c) by wire transfer of such amount in immediately
 available funds, to the Owner Trustee for deposit in its account at State
 Street Bank and Trust Company, 225 Franklin Street, Boston, Massachusetts
 02110, ABA No. 011-00-0028, Account No. 9903-990-1,  Reference:  US Airways
 1998-1 EETC/US Airways, Inc.  Trust No.  N7__UW, not later than 9:30 a.m.,
 New York City time.  The amount of the Owner Participant's Commitment shall
 be held for the account of the Owner Participant by the Owner Trustee until
 released by the Owner Participant or its special counsel at closing or
 until returned to the Owner Participant in accordance with Section 2(f).

           (c) Lessee's Notice of Delivery Date.  The Lessee agrees to give
 the Owner Participant, the Indenture Trustee, the Owner Trustee, the Pass
 Through Trustee and the Subordination Agent at least three (3) Business
 Days written or facsimile notice prior to the Delivery Date, which notice
 shall specify the Lessor's Cost for the Aircraft, the estimated amount of
 the Owner Participant's Commitment, the Delivery Date for the Aircraft, the
 serial number of the Airframe and each Engine, and the United States
 registration number for the Aircraft.

           (d)  Default by Pass Through Trustee or Owner Participant.  In
 case any of the Pass Through Trustee or the Owner Participant shall default
 in its obligation under the provisions of this Section 2, 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.

           (e)   Closing.  The closing of the transactions referred to in
 this Agreement shall take place commencing at 9:30 a.m. local time, on the
 Delivery Date, at the offices of Skadden, Arps, Slate, Meagher & Flom LLP
 in Washington, D.C., except that the Trust Indenture, the Trust Supplement,
 the Lease and the Lease Supplement shall be delivered at the offices of
 Skadden, Arps, Slate, Meagher & Flom LLP in New York, New York.

           (f)  Postponement of Scheduled Closing Date.

           (i)  If  for  any  reason  whatsoever  the  closing of the
      transactions contemplated hereby  is not consummated on the Delivery 
      Date provided for  pursuant to Section 2(c) (the "Scheduled Delivery
      Date"),  the  closing  shall be deemed adjourned to the next Business
      Day or to such other Business Day on or prior to _______________ as
      Lessee shall  specify by written notice to the Pass Through Trustee,
      the Owner Participant, the Owner Trustee and the Indenture Trustee, in
      which case the Owner  Participant will keep its funds available, and
      the Pass Through Trustee shall comply with its obligations under
      Section 8.01 of each applicable Pass Through Trust Supplement.

           (ii) If the closing fails to occur on the Scheduled Delivery
      Date, the Owner Trustee shall promptly return to each Participant that
      makes funds available to it in accordance with this Section 2  such
      funds, together with  interest or income earned thereon.

           (iii)     If the closing fails to occur on the Scheduled Delivery
      Date and funds are not returned to each Participant that made funds
      available  as provided by clause (ii) above, the Owner Trustee shall,
      if so instructed by Lessee, use  reasonable efforts to invest, at the
      risk of Lessee, the funds received by it from Participants in Cash
      Equivalents. Any such obligations  purchased by the Owner Trustee,
      whether directly or through a repurchase agreement,  shall be held in
      trust by the Owner Trustee for the  benefit  of the  respective
      Participants  that provided  such funds,  and not as part of the Trust
      Estate or the Trust Indenture Estate.

           (iv) If the closing fails to occur on the Scheduled Delivery
      Date, unless the Owner Trustee returns all funds to the Participants
      by 2:00 p.m., New York City time, on the Scheduled Delivery Date,
      Lessee shall reimburse each  Participant that has made funds available
      pursuant to this Section 2 for the loss of the use of its funds an
      amount equal to the excess, if any,  of (x) interest at the Debt Rate
      on the amount of such funds for the period from and  including  the 
      Scheduled Delivery Date to but excluding the actual Delivery  Date or,
      if  earlier, the day on which such Participant's funds are returned if
      such return is made by 2:00 p.m.,  New York City time (or to but
      excluding the next following Business Day if such return is not made
      by such time) over (y) any amount paid to such Participant in respect
      of interest or income earned by the Owner Trustee pursuant to clause
      (iii) above.

           (v)  On the Delivery Date or on the date funds are required to be
      returned to Participants pursuant to clause (ii) above,  Lessee shall 
      reimburse the Owner Trustee, for the benefit of Participants that
      provided funds which are invested by the Owner Trustee pursuant to
      this subsection (f), for any losses incurred on such  investments. 
      All  income and  profits on the investment of such funds shall be for
      the respective accounts of such Participants,  and the Owner Trustee
      shall not be liable for failure to invest such funds or for any losses
      incurred on such investments, except for its own negligence or willful
      misconduct.

      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 2 and its instructions to the Owner
 Trustee to release such funds shall constitute, without further act,
 authorization and direction by the Owner Participant to the Owner Trustee: 

           (i)  to purchase the Aircraft from Lessee and to pay to Lessee
      the 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;

           (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 and issue the
      Equipment Notes as provided in Section 2(a); 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 PRECEDENT.

           (a)  Conditions Precedent to the Participations in the Aircraft. 
 It is agreed that the obligations of the Owner Trustee, the Owner
 Participant, the Indenture Trustee, the Subordination Agent and the Pass
 Through Trustee on behalf of each Pass Through Trust to participate in the
 transactions contemplated hereby on the Delivery Date are subject to the
 fulfillment to the satisfaction of each party (or waiver by such party),
 prior to or on the  Delivery Date of the following conditions precedent,
 except that paragraphs (iii) and (v)(5), (xxi), (xxii) and (xxiii) shall
 not be a condition precedent to the obligations of the Pass Through
 Trustee, and paragraphs (iv), (vii) (insofar as it relates certificates and
 documents to be delivered by the Owner Participant) and (xiv) shall not be
 a condition precedent to the obligation of the Owner Participant and
 paragraph (xxv) shall not be a condition precedent to the obligations of
 the Subordination Agent:

           (i)  At least three (3) Business Days prior to the Delivery Date,
      each of the parties hereto shall have received the Delivery Notice
      pursuant to Section 2(c).

           (ii) On the Delivery Date, 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 2.

           (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 2.

           (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 2.

           (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 Owner Trustee,
      the Owner Participant, the Indenture Trustee, the Pass Through Trustee
      and the Subordination Agent and shall be in full force and effect and
      executed counterparts shall have been delivered to the Owner Trustee,
      the Owner Participant, the Indenture Trustee, the Pass Through Trustee
      and the Subordination Agent, or their respective 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 Equipment Note 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 Indenture 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, 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);

                (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 Indenture and 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 Equipment Notes; and

                (13) the Consent and Agreement.

           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 Class A, 
           Class B and Class C 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 Transportation Code shall have
      been executed and delivered by the Owner Trustee, and arrangements
      satisfactory to the Owner Participant and the Indenture Trustee shall
      have been made for the filing of such financing statement or
      statements 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 arrangements
      satisfactory to the Owner Participant and the Indenture Trustee shall
      have been made for the filing of such financing statements.

           (vii)     The Owner Trustee, the Owner Participant, the Indenture
      Trustee, Pass Through Trustee and the Subordination Agent shall have
      received the following, in each case in form and substance
      satisfactory to it (except it shall not be a condition to the
      obligation of any such party that it receive a certificate or other
      document required to be delivered by it):

           (A)  (1)  an incumbency certificate of Lessee as to the
           person or persons authorized to execute and deliver the
           Operative Documents to which the Lessee is a party and any
           other documents to be executed on behalf of Lessee 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 or Lessee's executive committee,
           certified by the Secretary or an Assistant Secretary of
           Lessee, 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 in connection with the transactions contemplated
           hereby; and

                (3)  a copy of the certificate of incorporation of
           Lessee, certified by the Secretary of State of               
                     , a copy of the by-laws of Lessee certified by the
           Secretary or Assistant Secretary of Lessee, and a
           certificate or other evidence from the Secretary of State of
           the State of                         , dated as of a date
           shortly prior to the closing, as to the due incorporation
           and good standing of Lessee in such state.

           (B)  (1)  an incumbency certificate of the Indenture Trustee
           as to the person or persons authorized to execute and
           deliver the Operative Documents to which the Indenture
           Trustee is a party 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 of the
           Indenture Trustee certified by the Massachusetts
           Commissioner of Banks, a copy of the by-laws of the
           Indenture Trustee certified by the Secretary or an Assistant
           Secretary of the Indenture Trustee, and a certificate or
           other evidence from the Massachusetts Commissioner of Banks,
           dated as of a date shortly prior to closing, as to the due
           incorporation and good standing of the Indenture Trustee in
           such state; 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 in all material respects
           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
           the Operative Documents to which the Owner Trustee is a
           party 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 of the Owner
           Trustee certified by the Comptroller of the Currency, a copy
           of the by-laws of the Owner Trustee certified by the
           Secretary or an Assistant Secretary of the Owner Trustee and
           a certificate or other evidence from the Comptroller of the
           Currency, dated as of a date shortly prior to closing, as to
           the good standing 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 in all material respects 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). 

           (D)  (1)  an incumbency certificate of the Owner Participant
           as to the person or persons authorized to execute and
           deliver the Operative Documents to which the Owner
           Participant is a party 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 copy of the resolutions of the board of
           directors of the Owner Participant, certified by the
           Secretary or an Assistant Secretary of the Owner
           Participant, 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 Participant in connection with the transactions
           contemplated hereby have been duly authorized;

                (3)  a copy of the certificate of incorporation of the
           Owner Participant certified by the Secretary of State of the
           State of __________, a copy of the by-laws of the Owner
           Participant, each certified by the Secretary or an Assistant
           Secretary of the Owner Participant, and a certificate or
           other evidence from the Secretary of State of the State of
           ____________, dated as of a date shortly prior to closing,
           as to the due incorporation and good standing of the Owner
           Participant in such state; 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 in all material respects
           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) The Owner Trustee, the Owner Participant, the Indenture
      Trustee, the Pass Through Trustee and the Subordination Agent shall
      have received a certificate signed by an authorized officer of Lessee
      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;

                (3)  application for registration of the Aircraft in
           the name of the Owner Trustee (together with any required
           affidavits) has been duly made with the Federal Aviation
           Administration; and

                (4)  the representations and warranties contained
           herein of Lessee are correct in all material respects 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 were correct on and as of
           such earlier date).

           (x)  [Reserved.]

           (xi) The Owner Trustee, the Owner Participant, the Indenture
      Trustee, the Pass Through Trustee and the Subordination Agent shall
      have  received, addressed to each such party, and reasonably
      satisfactory as to scope and substance to each addressee thereof, 
      opinions dated the Delivery Date substantially in the form of Exhibit
      B-1 hereto from Skadden, Arps, Slate, Meagher & Flom (Illinois),
      special counsel for Lessee, and an opinion dated the Delivery Date
      substantially in the form of Exhibit B-2 hereto from Lessee's legal
      department, and the Owner Participant shall have received, addressed
      to such party and reasonably satisfactory as to scope and substance to
      the Owner Participant, an opinion of Skadden, Arps, Slate, Meagher &
      Flom LLP, special counsel for Lessee, dated the Delivery Date
      substantially in the form of Exhibit B-2 hereto.

           (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 and Lessee
      and reasonably satisfactory as to scope and substance to the Pass
      Through Trustee, the Owner Participant and Lessee, an opinion dated
      the Delivery Date substantially in the form of Exhibit C hereto from   
                                , special counsel to the Manufacturer and
      the Seller, and an opinion dated the Delivery Date substantially in
      the form of Exhibit C-2 hereto from Manufacturer's legal department,
      with respect to the Manufacturer Documents, with respect to the
      Manufacturer Documents.

           (xiii)    The Owner Participant, the Indenture Trustee, the Pass
      Through Trustee and the Subordination Agent shall have received,
      addressed to each such party, and reasonably satisfactory as to scope
      and substance to each addressee thereof, an opinion dated the Delivery
      Date substantially in the form of Exhibit D hereto from Ray, Quinney &
      Nebeker, special counsel for the Owner Trustee.

           (xiv)     The Owner Trustee, the Indenture Trustee, the Pass
      Through Trustee and the Subordination Agent shall have received,
      addressed to each such party, and reasonably satisfactory as to scope
      and substance to each addressee thereof, an opinion dated the Delivery
      Date substantially in the form of Exhibit E-1 hereto from
      ________________, special counsel for the Owner Participant, and an
      opinion dated the Delivery Date substantially in the form of Exhibit
      E-2 hereto from the Owner Participant's in-house counsel.

           (xv) The Owner Trustee, the Owner Participant, the Indenture
      Trustee, the Pass Through Trustee and the Subordination Agent shall
      have received, addressed to each such party, and reasonably
      satisfactory as to scope and substance to each addressee thereof, an
      opinion dated the Delivery Date substantially in the form of Exhibit F
      hereto from Crowe & Dunlevy, P.C., special FAA counsel.

           (xvi)     The Owner Trustee, the Owner Participant, the Pass
      Through Trustee and the Subordination Agent shall have received,
      addressed to each such party, and reasonably satisfactory as to scope
      and substance to each addressee thereof, an opinion dated the Delivery
      Date substantially in the form of Exhibit G from Bingham Dana LLP,
      special counsel for the Indenture Trustee.

           (xvii)    [Reserved.]

           (xviii)   The Owner Trustee, the Owner Participant, the Indenture
      Trustee, the Pass Through Trustee and the Subordination Agent shall
      have received an independent insurance broker's report, in form and
      substance satisfactory to 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)     The Owner Participant shall have received an appraisal
      dated the Delivery Date from ______________ in form and substance
      satisfactory to it.

           (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, a
      favorable 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)    There shall have been, since the date hereof, no
      amendment, modification, addition, or change in or to the provisions
      of the Code, 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 anticipated
      income tax benefits with respect to the Aircraft.

           (xxiii)   The Owner Trustee, the Owner Participant, the Indenture
      Trustee and the Subordination Agent, 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 dated the
      Delivery Date substantially in the form of Exhibit H hereto addressed
      to each such party of Bingham Dana LLP, special counsel for the Pass
      Through Trustee, and reasonably satisfactory as to scope and substance
      to each addressee thereof, and (C) 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 corporate
      action in connection therewith and compliance with the conditions
      herein set forth.

           (xxiv)    No Lease Event of Default has occurred and is
      continuing and no Event of Loss has occurred with respect to the
      Airframe or any Engine.

           (xxv)     The Owner Trustee, the Owner Participant, the Indenture
      Trustee and the Pass Through Trustee shall have received, addressed to
      each such party, and reasonably satisfactory as to scope and
      substance, to each addressee thereof, an opinion dated the Delivery
      Date substantially in the form of Exhibit I from Bingham Dana LLP,
      special counsel for 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
 Transportation Code, Lessee will cause Crowe & Dunlevy, P.C., special FAA
 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.  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 on the
 Delivery Date, and (B) the obligations of Lessee to enter into the other
 Operative Documents on the Delivery Date are all subject to the fulfillment
 to the satisfaction of Lessee prior to the Delivery Date of the following
 conditions precedent:

           (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) in the manner specified in
      Section 4(a)(v), shall each be satisfactory in form and substance to
      Lessee, shall be in full force and effect on the Delivery Date, and an
      executed counterpart of each thereof (other than the Equipment Notes)
      shall have been delivered to Lessee or its special counsel.

           (iv) Lessee shall have received (A) each certificate referred to
      in Section 4(a)(vii) (other than the certificate and documents
      referred to in clause (A) thereof), (B) the certificate referred to in
      Section 4(a)(xxiii)(A), and (C) such other documents and evidence with
      respect to the Pass Through Trustee as Lessee 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
      corporate proceedings in connection therewith and compliance with the
      conditions herein set forth.

           (v)  Lessee 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)(xxv), and 4(a)(xxiii)(B) in each case addressed to Lessee and
      dated the Delivery Date and in each case in scope and substance
      reasonably satisfactory to Lessee 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.

           (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 to enter into any transaction contemplated by
      the Operative Documents.

           (viii)    There shall have been, since the date hereof, no
      amendment, modification, addition or change in or to the Code, 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.     EXTENT OF INTEREST OF CERTIFICATE HOLDERS.  No
 Certificate Holder 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 Equipment Notes
 held by such holder and all other sums payable to such holder hereunder,
 under the Trust Indenture and under such Equipment Notes shall have been
 paid in full.  Each Pass Through Trustee and, by its acceptance of a
 Equipment Note, 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
 Equipment Notes, the Trust Indenture or hereunder, except as expressly
 provided in the Operative Documents.

      SECTION 6.     REPRESENTATIONS AND WARRANTIES OF LESSEE; INDEMNITIES.

           (a)  Representations and Warranties.  Lessee represents and
 warrants to the Pass Through Trustee, the Owner Trustee, the Indenture
 Trustee, each Liquidity Provider, the Subordination Agent and the Owner
 Participant that:

           (i)  Lessee 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 the Lessee Documents, the Pass Through Trust
      Agreements 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), business or
      properties of Lessee 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 Virginia) is located at
      Arlington, Virginia;

           (iii)     the execution and delivery by Lessee of the Lessee
      Documents, the Pass Through Trust Agreements and each other Operative
      Document to which Lessee is a party, and the performance of the
      obligations of Lessee under the Lessee Documents, the Pass Through
      Trust Agreements and each other Operative Document to which Lessee is
      a party, have been duly authorized by all necessary corporate action
      on the part of Lessee, do not require any stockholder approval, or
      approval or consent of any trustee or holder of any material
      indebtedness or material obligations of Lessee, 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 certificate of incorporation or by-laws of Lessee, 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 under, any indenture, mortgage, contract or other
      agreement to which Lessee 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 Lessee and its subsidiaries considered as one enterprise
      provided, that insofar as the representations and warranties set forth
      in this Section 6(a)(iii) apply to the prohibited transaction rules of
      ERISA and Section 4975 of the Code, such representations and
      warranties are based upon and subject to the truth and accuracy of the
      representations, warranties and covenants set forth in Section 6(n)
      and the representations and warranties made or deemed made by each
      purchaser of Certificates issued by a Pass Through Trust;

           (iv) neither the execution and delivery by Lessee of the Lessee
      Documents, the Pass Through Trust Agreements or any other Operative
      Document to which Lessee is a party, nor the performance of the
      obligations of Lessee under the Lessee Documents, the Pass Through
      Trust Agreements or the other Operative Documents to which Lessee 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, other than (A) the registration of the Pass Through Trust
      Certificates under the Securities Act and under the securities laws of
      any state in which the Pass Through Trust 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 the
      Delivery Date, which orders, permits, waivers, exemptions,
      authorizations and approvals have been, or on the Delivery Date will
      be, duly obtained and are, or on the Delivery Date will be, in full
      force and effect, (D) the application for registration of the Aircraft
      referred to in Section 4(a)(ix)(3), (E) the registrations and filings
      referred to in Section 6(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 Lessee and its subsidiaries
      considered as one enterprise;

           (v)  this Agreement, each of the other Lessee Documents and the
      Pass Through Trust Agreements to which Lessee is a party constitute
      (or, in the case of documents to be executed on the Delivery Date,
      will constitute) the legal, valid and binding obligations of Lessee
      enforceable against Lessee 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;

           (vi) except for (A) the filing of the Trust Agreement with the
      FAA, (B) the registration of the Aircraft pursuant to the
      Transportation Code, (C) the filing for recording pursuant to the
      Transportation Code 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 Virginia and Utah and such other states as may be specified in the
      opinion 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) or
      other action is necessary under the laws of the United States of
      America or any State thereof in order to perfect the Owner Trustee's
      title to and 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;

           (vii)     neither Lessee nor any of its Affiliates has directly
      or indirectly offered any interest in the Trust Estate, the Equipment
      Notes or the Pass Through Trust Certificates for sale to any Person
      other than in a manner permitted by the Securities Act and by the
      rules and regulations thereunder;

           (viii)    Lessee is not 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 a
      Lease Default or Lease Event of Default;

           (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 Equipment
      Notes 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;

           (xiii)    on the Delivery Date, all sales or use tax then due and
      for which Lessee is responsible pursuant to Section 6(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;

           (xiv)     except as may have been disclosed in the Lessee's
      reports filed with the Securities Exchange Commission, there are no
      pending or threatened actions or proceedings that individually or in
      the aggregate which could be expected to have a material adverse
      effect on the condition (financial or otherwise), business or
      properties of Lessee and its subsidiaries considered as one
      enterprise; and

           (xv) the Owner Trustee will receive good and marketable title to
      the Aircraft from Lessee free and clear of all Liens, except the
      rights of Lessee under the Lease and the Lease Supplement covering the
      Aircraft, the Lien of the Trust Indenture, the beneficial interest of
      the Owner Participant in the Aircraft, and the Liens permitted by
      clause (iv) (solely for Taxes not yet due but excluding any such Taxes
      being contested) of Section 6 of the Lease.

           (b)  General Tax Indemnity. 

           (i)  Indemnity.  Except as provided in Section 6(b)(ii) hereof,
      Lessee shall pay, protect, save and on written demand shall indemnify
      and hold harmless each Indemnitee from and against (x) any and all
      Taxes howsoever imposed upon or against any Indemnitee, Lessee or all
      or any part of the Aircraft, the Airframe, the Engines, the Parts or
      any part thereof or interest therein or otherwise by the United States
      Federal government only, any 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
      upon or in connection with, relating to, or measured by (A) the
      manufacture, financing, purchase,  acceptance, delivery, rejection,
      transport, ownership, possession, operation, use, sale, return,
      storage, leasing, transfer of title to, transfer of registration of,
      exportation or other disposition of, the Aircraft, the Airframe, the
      Engines, the Parts or any part thereof or interest therein, (B) the
      rentals, receipts or earnings from the Aircraft, the Airframe, the
      Engines, the Parts or any part thereof or interest therein, (C) 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, the Engines, the Parts or any part thereof
      or interest therein, (E) the Secured Certificates, their issuance or
      acquisition or the payments of any amounts thereunder, or the
      Operative Documents, or amendments or supplements thereto and their
      execution.  

           (ii) Exclusions from General Tax Indemnity.  The provisions of
      Section 6(b)(i) shall not apply:

                (1)  to any Income Tax imposed by (A) the United States
           Federal government, (B) any state or local government or
           other taxing authority in the United States or (C) any
           foreign government or any political subdivision or taxing
           authority thereof or any territory or possession of the
           United States or by any international authority (a "Foreign
           Jurisdiction") (A, B and C collectively referred to as,
           "Taxing Authority"), provided, however, that unless the
           Owner Participant maintains a permanent establishment,
           office or other place of business in the foreign
           jurisdiction imposing the tax (and for this purpose the
           ownership or leasing of one or more aircraft in such
           jurisdiction shall not be deemed a permanent establishment,
           office or other place of business), the exclusion set forth
           in this subparagraph (1) shall not apply to Income Taxes
           imposed by a Foreign Jurisdiction on the Owner Participant
           as a result of the use or location of the Aircraft in the
           jurisdiction imposing such Tax, but only to the extent such
           Income Taxes exceed the amount of Income Taxes imposed by
           such Foreign Jurisdiction had the Aircraft not been used in
           such jurisdiction; 

                (2)  to Taxes (including intangible taxes or transfer
           taxes) relating to any payments of principal, interest or
           Make-Whole Amount, if any, on the Secured Certificates, or
           to a Certificate Holder, imposed by any government or taxing
           authority; 

                (3)  to any Tax imposed on an Indemnitee as a result of
           a voluntary transfer or disposition by such Indemnitee
           including, without limitation, the revocation of the trust
           created by the Trust Agreement or an involuntary transfer or
           disposition of all or any portion of its respective
           equitable or legal ownership interest in the Aircraft, the
           Airframe, the Engines, the Parts or any part thereof, the
           Trust Estate or the Operative Documents, unless such
           transfer or disposition shall occur (A) upon 30 days prior
           notice during a period when an Event of  Default has
           occurred and is continuing under the Lease at the time of
           transfer or disposition, or (B) in connection with the
           termination of the Lease or action or direction of the
           Lessee pursuant to Sections 7(b)(i), (ii), (v), or (vi), 8
           (but only to the extent of such disposition), 9, 10 or 19
           thereof;

                (4)  to any Tax imposed on any Indemnitee or any
           successor, assign or Affiliate of any thereof, as a result
           of a voluntary or involuntary transfer or other disposition
           by the Owner Participant of all or any portion of the Owner
           Participant's respective equitable or legal interests in the
           Aircraft, the Trust Estate or the Trust Indenture Estate;

                (5)  to any Tax imposed upon any Indemnitee which
           results from the willful misconduct or negligence of any
           Indemnitee; 

                (6)  to any Tax based on, measured by or imposed with
           respect to any fees, commissions or compensation received by
           the Owner Trustee or the Indenture Trustee in connection
           with any transaction contemplated by the Operative
           Documents; 

                (7)  to any Tax imposed with respect to any period
           after (A) the expiration of the Term and return of
           possession of the Aircraft to the Owner Trustee or its
           designee pursuant to the terms of the Lease, (B) the earlier
           discharge in full of Lessee's obligation to pay the
           Termination Value and all other amounts due under the Lease
           and transfer of title to the Aircraft or (C) placement in
           storage of the Aircraft pursuant to Section 5(d) of the
           Lease;

                (8)  to any Tax in the nature of an intangible or
           similar tax upon or with respect to the value of the Owner
           Participant's interest in the Trust Indenture Estate or the
           value or principal amount of any interest, in any of the
           Secured Certificates imposed by any government or taxing
           authority; 

                (9)  to any Tax imposed on or with respect to a
           transferee (or subsequent transferee) of an original
           Indemnitee to the extent (a)  such Tax would not have been
           required to be withheld or imposed on or with respect to
           such original Indemnitee or (b) to the extent such Tax
           exceeds the amount of the Tax that would have been imposed
           on the original Indemnitee;

                (10) to any Tax imposed resulting from, or which would
           not have occurred but for, a Lessor Lien attributable to it;

                (11) to any Tax which has been included in the Lessor's
           Cost;

                (12) to any Tax for which Lessee is obligated to pay
           the Owner Participant under the Tax Indemnity Agreement;

                (13) to any Tax that would not have been imposed but
           for an Indemnitee's breach of any covenant, or the
           inaccuracy of any representation or warranty, of such
           Indemnitee contained in any Operative Document;

                (14) to any Tax being contested pursuant to Section
           6(b)(iv);

                (15) to any Tax imposed by any jurisdiction which would
           have been imposed on any Indemnity as a result of activities
           in such jurisdiction unrelated to the transactions
           contemplated by the Operative Documents; 

                (16) to interest, penalties and additions to Tax
           imposed as a result of (in whole or in part) failure of
           Owner Participant to timely and properly file any return,
           unless such failure to file is caused by Lessee's failure to
           timely provide information required to be provided under the
           Operative Documents;

                (17) to any U.S. withholding taxes imposed on payments
           to a foreign person; and

                (18) to any Taxes imposed by Section 4975 of the Code
           or Section 502(i) of ERISA or any successor provisions.

      The provisions of this Section 6(b)(ii) shall not apply to any Tax
      imposed in respect of the receipt or accrual of any indemnity payment
      made by Lessee pursuant to this Section 6(b) or Section 6(c) hereof;
      provided, however, that this clause shall not result in any
      duplication of any amounts of any gross-up payable under Section
      6(b)(iii) or Section 6(c) hereof. 

           (iii)     Payments.  Lessee's indemnity obligation to an
      Indemnitee under this Section 6(b) shall equal the amount which, after
      taking into account any Tax imposed upon the receipt or accrual of the
      amounts payable under this Section 6(b) and any tax benefits realized
      by such Indemnitee as a result of the indemnifiable Tax (including,
      without limitation, any benefits realized as a result of an
      indemnifiable Tax being utilized by such Indemnitee as a credit
      against Taxes not indemnifiable under this Section 6(b)), shall equal
      the amount of the Tax indemnifiable under this Section 6(b).

                At Lessee's request, the computation of the amount of any
      indemnity payment owed by Lessee or any amount owed by a Indemnitee to
      Lessee pursuant to this Section 6(b) shall be verified and certified
      by a nationally recognized independent public accounting firm
      reasonably acceptable to Lessee and the Indemnitee. The costs of such
      verification (including the fee of such public accounting firm) shall
      be borne by Lessee unless such verification shall result in an
      adjustment in Lessee's favor of 5% or more of the net present value of
      the payment as computed by such Indemnitee, in which case the costs
      shall be paid by such Indemnitee. 

                Each Indemnitee shall provide Lessee with such
      certifications, information and documentation as shall be in such
      Indemnitee's possession and as shall be reasonably requested by Lessee
      to minimize any indemnity payment pursuant to this Section 6(b). 

                Each Indemnitee shall promptly forward to Lessee any written
      notice, bill or advice received by it from any Taxing Authority
      concerning any Tax for which it seeks indemnification under this
      Section 6(b).  Lessee shall pay any amount for which it is liable
      pursuant to this Section 6(b) directly to the appropriate Taxing
      Authority if legally permissible or upon demand of an Indemnitee, to
      such Indemnitee within 30 days of such demand (or, if a contest occurs
      in accordance with Section (6)(iv), within 30 days after a Final
      Determination (as defined below)), but in no event more than one
      business day prior to the date the Tax to which such amount payable
      hereunder relates is due. If requested by an Indemnitee in writing,
      Lessee shall furnish to the appropriate Indemnitee the original or a
      certified copy of a receipt for Lessee's payment of any Tax paid by
      Lessee or such other evidence of payment of such Tax as is acceptable
      to such Indemnitee. Lessee shall also furnish promptly upon written
      request such data as any Indemnitee may reasonably require to enable
      such Indemnitee to comply with the requirements of any taxing
      jurisdiction unless such data is not reasonably available to Lessee
      or, unless such data is specifically requested by a Taxing Authority,
      is not customarily furnished by domestic air carriers under similar
      circumstances. For purposes of this Section 6(b), a "Final
      Determination" shall mean (i) a decision, judgment, decree or other
      order by any court of competent jurisdiction that occurs pursuant to
      the provisions of Section 6(b)(iv), which decision, judgment, decree
      or other order has become final and unappealable, (ii) a closing
      agreement or settlement agreement entered into in accordance with
      Section 6(b)(iv) that has become binding and is not subject to further
      review or appeal (absent fraud, misrepresentation, etc.), or (iii) the
      termination of administrative proceedings and the expiration of the
      time for instituting a claim in a court proceeding. 

                 If any Indemnitee shall realize a tax savings by reason of
      any Tax paid or indemnified by Lessee pursuant to this Section 6(b)
      (whether such tax savings shall be by means of a foreign tax credit,
      depreciation or cost recovery deduction or otherwise) and such savings
      is not otherwise taken into account in computing such payment or
      indemnity such Indemnitee shall pay to Lessee an amount equal to the
      lesser of (i) the amount of such tax savings, plus any additional tax
      savings recognized as the result of any payment made pursuant to this
      sentence, when, as if, and to the extent, realized or (ii) the amount
      of all payments pursuant to this Section 6(b) by Lessee to such
      Indemnitee (less any payments previously made by such Indemnitee to
      Lessee pursuant to this Section 6(b)(iii)) and the excess, if any, of
      the amount described in clause (i) over the amount described in clause
      (ii) shall be carried forward and applied to reduce pro tanto any
      subsequent obligations of Lessee to make payments to such Indemnitee
      pursuant to this Section 6(b)).  Each such Indemnitee shall in good
      faith use reasonable efforts in filing its tax returns and in dealing
      with Taxing Authorities to seek and claim any such tax benefit. 

           (iv) Contests.  If a written claim is made against an Indemnitee
      for Taxes with respect to which Lessee could be liable for payment or
      indemnity hereunder, or if an Indemnitee makes a determination that a
      Tax is due for which Lessee could have an indemnity obligation
      hereunder, such Indemnitee shall promptly give Lessee notice in
      writing of such claim (provided, that failure to so notify Lessee
      shall not relieve Lessee of its indemnity obligations hereunder unless
      such failure to notify effectively forecloses Lessee's rights to
      require a contest of such claim) and shall take no action with respect
      to such claim without the prior written consent of Lessee for 30 days
      following the receipt of such notice by Lessee; provided, that, in the
      case of a claim made against an Indemnitee, if such Indemnitee shall
      be required by law to take action prior to the end of such 30-day
      period, such Indemnitee shall, in such notice to Lessee, so inform
      Lessee, and such Indemnitee shall take no action for as long as it is
      legally able to do so (it being understood that a Indemnitee shall be
      entitled to pay the Tax claimed and sue for a refund prior to the end
      of such 30-day period if (i)(A) the failure to so pay the Tax would
      result in substantial penalties (unless immediately reimbursed by
      Lessee) and the act of paying the Tax would not materially prejudice
      the right to contest or (B) the failure to so pay would result in
      criminal penalties and (ii) such Indemnitee shall take any action so
      required in connection with so paying the Tax in a manner that is the
      least prejudicial to the pursuit of the contest). In addition, such
      Indemnitee shall (provided, that Lessee shall have agreed to keep such
      information confidential other than to the extent necessary in order
      to contest the claim) furnish Lessee with copies of any requests for
      information from any Taxing Authority relating to such Taxes with
      respect to which Lessee may be required to indemnify hereunder. If
      requested by Lessee in writing within 30 days after its receipt of
      such notice, such Indemnitee shall, at the expense of Lessee
      (including all reasonable out-of-pocket costs and reasonable
      attorneys' and accountants' fees), in good faith contest (or, if
      permitted by applicable law, allow Lessee to contest) through
      appropriate administrative and judicial proceedings the validity,
      applicability or amount of such Taxes by (I) resisting payment
      thereof, (II) not paying the same except under protest if protest is
      necessary and proper or (III) if the payment is made, using reasonable
      efforts to obtain a refund thereof in an appropriate administrative
      and/or judicial proceeding. If requested to do so by Lessee, the
      Indemnitee shall appeal any adverse administrative or judicial
      decision, except that the Indemnitee shall not be required to pursue
      any appeals to the United States Supreme Court. If and to the extent
      the Indemnitee is able to separate the contested issue or issues from
      other issues arising in the same administrative or judicial proceeding
      that are unrelated to the transactions contemplated by the Operative
      Agreements without, in the good faith judgment of such Indemnitee,
      adversely affecting such Indemnitee, such Indemnitee shall permit
      Lessee to control the conduct of any such proceeding and shall provide
      to Lessee (at Lessee's cost and expense) with such information or data
      that is in such Indemnitee's control or possession that is reasonably
      necessary to conduct such contest. In the case of a contest controlled
      by a Indemnitee, such Indemnitee shall consult with Lessee in good
      faith regarding the manner of contesting such claim and shall keep
      Lessee reasonably informed regarding the progress of such contest. An
      Indemnitee shall not fail to take any action expressly required by
      this Section 6(b)(iv) (including, without limitation, any action
      regarding any appeal of an adverse determination with respect to any
      claim) or settle or compromise any claim without the prior written
      consent of the Lessee (except as contemplated by this Section
      6(b)(iv).

                Notwithstanding the foregoing, in no event shall an
      Indemnitee be required to pursue any contest (or to permit Lessee to
      pursue any contest) unless (i) Lessee shall have agreed to pay such
      Indemnitee on demand all reasonable out-of-pocket costs and reasonable
      attorneys' and accountants' fees, (ii) if such contest shall involve
      the payment of the claim, Lessee shall advance the amount thereof (to
      the extent indemnified hereunder) plus interest, penalties and
      additions to tax with respect thereto that are required to be paid
      prior to the commencement of such contest on an interest-free after-
      Tax basis to such Indemnitee (and such Indemnitee shall promptly pay
      to the Lessee any net realized tax benefits resulting from such
      advance including any tax benefits resulting from making such
      payment), (iii) such Indemnitee shall have reasonably determined that
      the action to be taken will not result in any material risk of
      forfeiture, sale or loss of the Aircraft (unless Lessee shall have
      made provisions to protect the interests of any such Indemnitee in a
      manner reasonably satisfactory to such Indemnitee) (provided, that
      such Indemnitee agrees to notify Lessee in writing promptly after it
      becomes aware of any such risk), (iv) no Lease Event of Default shall
      have occurred and be continuing unless Lessee has provided security
      for its obligations hereunder by advancing to such Indemnitee before
      proceeding or continuing with such contest, the amount of the Tax
      being contested, plus any interest and penalties and an amount
      estimated in good faith by such Indemnitee for expenses, and (v) prior
      to commencing any judicial action controlled by Lessee, Lessee shall
      have acknowledged its liability for such claim hereunder, provided
      that Lessee shall not be bound by its acknowledgment if the Final
      Determination articulates conclusions of law and fact that demonstrate
      that Lessee has no liability for the contested amounts hereunder.
      Notwithstanding the foregoing, if any Indemnitee shall release, waive,
      compromise or settle any claim which may be indemnifiable by Lessee
      pursuant to this Section 6(b) without the written permission of
      Lessee, Lessee's obligation to indemnify such Indemnitee with respect
      to such claim (and all directly related claims and claims based on the
      outcome of such claim) shall terminate, subject to this Section
      6(b)(iii), and subject to Section 6(b)(iii), such Indemnitee shall
      repay to Lessee any amount previously paid or advanced to such
      Indemnitee with respect to such claim, plus interest at the rate that
      would have been payable by the relevant Taxing Authority with respect
      to a refund of such Tax. 

                Notwithstanding anything contained in this Section 6(b), a
      Indemnitee will not be required to contest the imposition of any Tax
      and shall be permitted to settle or compromise any claim without
      Lessee's consent if such Indemnitee (i) shall waive its right to
      indemnity under this Section 6(b) with respect to such Tax (and any
      directly related claim and any claim the outcome of which is
      determined based upon the outcome of such claim), (ii) shall pay to
      Lessee any amount previously paid or advanced by Lessee pursuant to
      this Section 6(b) with respect to such Tax, plus interest at the rate
      that would have been payable by the relevant Taxing Authority with
      respect to a refund of such Tax, and (iii) shall agree to discuss with
      Lessee the views or positions of any relevant Taxing Authority with
      respect to the imposition of such Tax. 

           (v)  Refund.  If any Indemnitee shall receive a refund of, or be
      entitled to a credit against other liability for, all or any part of
      any Taxes paid, reimbursed or advanced by Lessee, such Indemnitee
      shall pay to Lessee within 30 days of such receipt an amount equal to
      the lesser of (a) the amount of such refund or credit plus any net tax
      benefit (taking into account any Taxes incurred by such Indemnitee by
      reason of the receipt of such refund or realization of such credit)
      actually realized by such Indemnitee as a result of any payment by
      such Indemnitee made pursuant to this sentence (including this clause
      (a)) and (b) such tax payment, reimbursement or advance by Lessee to
      such Indemnitee theretofore made pursuant to this Section 6(b) (and
      the excess, if any, of the amount described in clause (a) over the
      amount described in clause (b) shall be carried forward and applied to
      reduce pro tanto any subsequent obligation of Lessee to make payments
      to such Indemnitee pursuant to this Section 6(b)). If, in addition to
      such refund or credit, such Indemnitee shall receive (or be credited
      with) an amount representing interest on the amount of such refund or
      credit, such Indemnitee shall pay to Lessee within 30 days of such
      receipt or realization of such credit that proportion of such interest
      that shall be fairly attributable to Taxes paid, reimbursed or
      advanced by Lessee prior to the receipt of such refund or realization
      of such credit.

           (vi) Tax Filing.  If any report, return or statement is required
      to be filed with respect to any Tax which is subject to
      indemnification under this Section 6(b), Lessee shall timely file the
      same (except for any such report, return or statement which a
      Indemnitee has timely notified the Lessee in writing that such
      Indemnitee intends to file, or for which such Indemnitee is required
      by law to file, in its own name); provided, that the relevant
      Indemnitee shall furnish Lessee with any information in such
      Indemnitee's possession or control that is reasonably necessary to
      file any such return, report or statement and is reasonably requested
      in writing by Lessee. Lessee shall either file such report, return or
      statement and send a copy of such report, return or statement to such
      Indemnitee, and Owner Trustee if the Indemnitee is not Owner Trustee,
      or, where Lessee is not permitted to file such report, return or
      statement, it shall notify such Indemnitee of such requirement and
      prepare and deliver such report, return or statement to such
      Indemnitee in a manner satisfactory to such Indemnitee within a
      reasonable time prior to the time such report, return or statement is
      to be filed.

           (vii)     Forms.  Each Indemnitee agrees to furnish from time to
      time to Lessee or Loan Trustee or to such other person as Lessee or
      Loan Trustee may designate, at Lessee's or Loan Trustee's request,
      such duly executed and properly completed forms as may be necessary or
      appropriate in order to claim any reduction of or exemption from any
      withholding or other Tax imposed by any Taxing Authority, if (x) such
      reduction or exemption is available to such Indemnitee and (y) Lessee
      has provided such Indemnitee with any information necessary to
      complete such form not otherwise reasonably available to such
      Indemnitee.

           (viii)    Non-Parties.  If a Indemnitee is not a party to this
      Agreement, Lessee may require the Indemnitee to agree in writing, in a
      form reasonably acceptable to Lessee, to the terms of this Section
      6(b) prior to making any payment to such Indemnitee under this Section
      6(b).

           (ix) Subrogation.  Upon payment of any Tax by Lessee pursuant to
      this Section 6(b) to or on behalf of a Indemnitee, Lessee, without any
      further action, shall be subrogated to any claims that such Indemnitee
      may have relating thereto. Such Indemnitee shall cooperate with Lessee
      (to the extent such cooperation does not result in any unreimbursed
      cost, expense or liability to such Indemnitee) to permit Lessee to
      pursue such claims.

           (x)  Foreign Tax On Loan Payments.  If an Owner Participant is
      incorporated or organized, or maintains a place of business or
      conducts activities in, a country other than the United States or in a
      territory, possession or commonwealth of the United States (within the
      meaning of the tax law of that foreign jurisdiction) and if as a
      result thereof any foreign Taxes (including withholding Taxes) are
      imposed on the Pass Through Trustees, Pass Through Trusts, or
      Certificate Holders, then Owner Participant shall reimburse Lessee for
      any payments Lessee is required to make to or on behalf of any Pass
      Through Trustee, Pass Through Trust, or Certificate Holder under this
      Section 6(b) as a result of the imposition of such Taxes. The amount
      payable by Owner Participant to Lessee shall be an amount which, after
      taking into account any such Taxes, any Tax imposed upon the receipt
      or accrual by Lessee of such payment by Owner Participant and any tax
      benefits or tax savings realized by Lessee with respect to the payment
      of such withholding Tax or the payment hereunder, shall equal the
      amount of Lessee's payment to or on behalf of such Pass Through
      Trustee, or Certificate Holder.

           (xi) Income Tax.  For purposes of this Section 6, the term Income
      Tax means any Tax based on or measured by or with respect to gross or
      net income or gross or net receipts (including, without limitation,
      capital gains taxes, branch profit taxes, accumulated earnings taxes,
      personal holding company taxes, succession taxes, estate taxes,
      minimum taxes, any withholding taxes on, based on or measured by gross
      or net income or receipts and taxes on tax preference items)
      (including in each case other than sales, use, license or property
      Taxes) and Taxes which are capital, doing business, franchise, excess
      profits, net worth taxes and interest, additions to tax, penalties or
      other charges in respect thereof.

           (c)  General Indemnity.  Lessee hereby agrees to indemnify each
 Indemnitee against, and agrees to protect, save and keep harmless each of
 them from (whether or not the transactions contemplated herein or in any of
 the other Operative Documents are consummated), any and all Expenses
 imposed on, incurred by or asserted against any Indemnitee, in any way
 relating to, based on or arising out of (A) the execution, delivery and
 performance of the Operative Documents or the Pass Through Documents and
 the transactions contemplated thereby; (B) the manufacture, purchase,
 acceptance or rejection of the Airframe or any Engine or Parts; (C) the
 Aircraft (or any portion thereof) or any engine installed on the Airframe
 or any airframe on which an Engine is installed whether or not arising out
 of the manufacture, purchase, registration, reregistration, financing,
 refinancing, ownership, delivery, nondelivery, inspection, lease, sublease,
 possession, storage, use or non-use, operation, maintenance, overhaul,
 modification, alteration, condition, replacement, repair, substitution,
 sale, return or other disposition of the Aircraft including, without
 limitation, any violation of law relating to the Aircraft (including
 environmental laws), latent or other defects, whether or not discoverable,
 strict tort liability and any claim for patent, trademark or copyright
 infringement; (D) the offer or sale of any interest in the Trust Estate or
 the Trust Agreement or any similar interest on or prior to the Delivery
 Date (including any violation of securities laws or ERISA); or (E) the
 offer or sale of any interest in the Equipment Notes or the Pass Through
 Certificates (or other evidence of the debt relating to the Aircraft) on
 the Delivery Date or in connection with a refinancing in accordance with
 the terms hereof (including any violation of securities laws or ERISA);
 provided, that the foregoing indemnity shall not extend to an Indemnitee
 with respect to any Expense to the extent such Expense is attributable to
 one or more of the following:  (1) any representation or warranty by such
 Indemnitee in the Operative Documents or the Pass Through Documents being
 incorrect, or (2) the failure by such Indemnitee to perform or observe any
 of its agreements, covenants or conditions in any of the Operative
 Documents or the Pass Through Documents, or (3) the willful misconduct or
 the gross negligence of such Indemnitee, or (4) (A) in the case of any
 Indemnitee, the offer, sale or other disposition (voluntary or involuntary)
 by such Indemnitee of all or any part of its interest in the Airframe or
 any Engine (other than during the continuance of a Lease Event of Default
 or pursuant to and in accordance with Sections 9, 10, 15 or 19 of the
 Lease), (B) in the case of a Certificate Holder, the offer, sale or other
 disposition (voluntary or involuntary) by such Certificate Holder of all or
 any part of its interest in any Equipment Note or (C) in the case of any
 Indemnitee, the offer, sale or other disposition by such Indemnitee of all
 or any part of such Indemnitee's interest in the Operative Documents, or
 (5) any Tax (other than taxes under ERISA or Section 4975 of the Code)
 whether or not Lessee is required to indemnify for such Tax pursuant to
 Section 6(b) hereof (it being understood that Section 6(b) hereof and the
 Tax Indemnity Agreement exclusively provide for Lessee's liability with
 respect to Taxes), or (6) in the case of the Owner Participant, the offer
 or sale by the Owner Participant after the Delivery Date of any interest in
 the Trust Estate or the Trust Agreement or any similar interest except
 during the continuance of an Event of Default so long as such disposition
 is made in accordance with Section 7(k), or (7) in the case of the Owner
 Trustee in its individual and trust capacities, and the Affiliates,
 successors and assigns thereof, a failure on the part of the Owner Trustee
 to distribute in accordance with the Trust Agreement any amounts
 distributable by it thereunder, or (8) in the case of the Indenture Trustee
 in its individual and trust capacities, failure on the part of the
 Indenture Trustee to distribute in accordance with the Trust Indenture any
 amounts distributable by it thereunder, or (9) in the case of any Pass
 Through Trustee, failure on the part of such Pass Through Trustee or the
 Subordination Agent to distribute in accordance with the Intercreditor
 Agreement and the Pass Through Trust Agreement amounts received and
 distributable thereunder, or (10) the authorization or giving or
 withholding of any future amendments, supplements, waivers or consents with
 respect to any of the Operative Documents which amendments, supplements,
 waivers or consents (a) are not or were not requested by Lessee or (b) are
 not occasioned by a specific requirement of the Operative Documents, or
 (11) except to the extent fairly attributable to acts or events occurring
 during the Term or actions taken (or required to be taken and not taken)
 during the Term, actions taken (or required to be taken and not taken) or
 events occurring after the earlier of:  (I) the return of possession of the
 Aircraft to the Owner Trustee or its designee pursuant to the terms of the
 Lease (other than pursuant to and in accordance with Section 15 thereof, in
 which case Lessee's liability under this Section 6(c) shall survive for so
 long as Lessor shall be entitled to exercise remedies under such Section
 15), (II) the termination of the Term in accordance with Section 9 of the
 Lease, (III) the payment by Lessee of all amounts required to be paid under
 the Lease following an Event of Loss or (IV) termination of the Lease and
 payment by Lessee of all amounts required to be paid by Lessee pursuant to
 the terms of the Operative Documents or (12) any amount which any
 Indemnitee expressly agrees to pay under any Operative Document or any
 amount which is expressly stated to be an Expense that is not reimbursable
 by Lessee under the Operative Documents, or (13) any amount that is an
 ordinary and usual operating or overhead expense of any Indemnitee (it
 being understood out-of-pocket expenses payable to third parties do not
 constitute "ordinary and usual operating and overhead expenses"), or (14)
 any amounts relating to the deregistration with the FAA of the Aircraft as
 a result of the Owner Participant or the Owner Trustee, as the case may be,
 not being a Citizen of the United States or any other act or omission of
 the Owner Trustee, the Owner Participant or such Indemnitee, or (15) any
 amounts attributable to any Lien which such Indemnitee is required to
 remove pursuant to the terms of the Operative Documents or the Pass Through
 Documents, or (16) any loss of tax benefits or increases in tax liability
 whether or not the Lessee is required to indemnify an Indemnitee elsewhere
 in the Operative Documents, or (17) principal of, or interest or premium on
 the Equipment Notes, or (18) any prohibited transaction, within the meaning
 of Section 406 of ERISA or Section 4975(c)(1) of the Code, occurring with
 respect to the purchase or holding of any Pass Through Certificate (i) over
 which purchase or holding the Owner Participant or any Affiliate thereof
 has discretion or control (other than in the capacity of a directed trustee
 or custodian), or (ii) by an employee benefit plan, within the meaning of
 Section 3(3) of ERISA, or individual retirement account or plan subject to
 Section 4975 of the Code with respect to which the Owner Participant (or
 any Affiliate thereof) has the power, directly or indirectly, to appoint or
 terminate, or to negotiate the terms of the management agreement with, the
 person or persons having discretion or control (other than in the capacity
 of a directed trustee or custodian), over such purchase or holding.   

           Lessee's indemnity obligation to an Indemnitee under this Section
 6(c) shall equal the amount which, after taking into account any Tax
 imposed upon the receipt or accrual of the amounts payable under this
 Section 6(c) and any tax benefits realized by such Indemnitee as a result
 of the accrual or payment of such Expense shall equal the amount of the
 Expense indemnifiable under this Section 6(c). 

           If any Indemnitee shall realize a tax savings by reason of any
 Tax paid or indemnified by Lessee pursuant to this Section 6(c) (whether
 such tax savings shall be by means of a foreign tax credit, depreciation or
 cost recovery deduction or otherwise) and such savings is not otherwise
 taken into account in computing such payment or indemnity such Indemnitee
 shall pay to Lessee an amount equal to the lesser of (i) the amount of such
 tax savings, plus any additional tax savings recognized as the result of
 any payment made pursuant to this sentence, when, as if, and to the extent,
 realized or (ii) the amount of all payments pursuant to this Section 6(c)
 by Lessee to such Indemnitee (less any payments previously made by such
 Indemnitee to Lessee pursuant to this Section 6(c)) (and the excess, if
 any, of the amount described in clause (i) over the amount described in
 clause (ii) shall be carried forward and applied to reduce pro tanto any
 subsequent obligations of Lessee to make payments to such Indemnitee
 pursuant to this Section 6(c)). 

           Nothing in this Section 6(c) shall be construed as a guaranty by
 Lessee of payments due pursuant to the Equipment Notes 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 after receiving such notice give notice of such claim to Lessee;
 provided that the failure to give such notice shall not affect the
 obligations of Lessee hereunder except to the extent Lessee is prejudiced
 by such failure or the Lessee's indemnification obligations are increased
 as a result of such failure.  If no Lease Event of Default shall have
 occurred and be continuing, Lessee shall be entitled, at its sole cost and
 expense, acting through counsel reasonably acceptable to the respective
 Indemnitee, (A) in any judicial or administrative proceeding that involves
 solely a claim for one or more Expenses, to assume responsibility for and
 control thereof, (B) 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 and to be allowed, at
 Lessee's sole expense, to participate therein.  Notwithstanding any of the
 foregoing to the contrary, Lessee shall not be entitled to assume
 responsibility for and control of, or participate in or be consulted with
 respect to any such judicial or administrative proceedings 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 Estate, the Trust Indenture Estate or any part thereof
 unless in such an event Lessee shall have posted a bond or other security
 satisfactory to the relevant Indemnitees in respect to such risk.  The
 Indemnitee may participate at its own expense and with its own counsel in
 any judicial proceeding controlled by Lessee pursuant to the preceding
 provisions. 

           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 6(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 6(c). 

           The Lessee shall supply the Indemnitee with such information
 reasonably requested by the Indemnitee as is necessary or advisable for the
 Indemnitee to control or participate in any proceeding to the extent
 permitted by this Section 6(c). 

           Upon payment of any Expense pursuant to this Section 6(c),
 Lessee, without any further action, shall be subrogated to any claims the
 Indemnitee may have relating thereto.  The Indemnitee agrees to give such
 further assurances or agreements and to cooperate with Lessee to permit
 Lessee to pursue such claims, if any, to the extent reasonably requested by
 Lessee.  

           If an Indemnitee is reimbursed, in whole or in part, with respect
 to any Expense paid by Lessee hereunder, it will promptly pay the amount
 refunded, including interest received thereto (but not an amount in excess
 of the amount Lessee or any of its insurers has paid in respect of such
 Expense pursuant to this Section 6(c)) over to Lessee. 

           To the extent permitted by applicable law, interest at the Base
 Rate plus  one percent (1.0%) shall be paid, on demand, on any amount or
 indemnity not paid when due pursuant to this Section 6 until the same shall
 be paid.  Such interest shall be paid in the same manner as the unpaid
 amount in respect of which such interest is due. 

           Any amount which is payable to Lessee by any Person pursuant to
 this Section 6 shall not be paid to Lessee if a Lease Event of Default has
 occurred and is continuing or if any payment is due and owing by Lessee to
 such Person under the Lease or any other Operative Document. Any such
 amount shall be held by such Person (the Lessee hereby granting a security
 interest in such amount to such Person) and, if a Lease Event of Default
 shall have occurred and be continuing, shall be applied against Lessee's
 obligations hereunder to such Person as and when due (and, to the extent
 that Lessee has no obligations hereunder to such Person, such amount shall
 be paid to Lessee).  At such time as there shall not be continuing any such
 Lease Event of Default or there shall not be due and owing any such
 payment, such amount shall be paid to Lessee to the extent not previously
 applied in accordance with the immediately preceding sentence.  

           (d)  Special Indemnity.  If a Class C Special Indemnity Event
 shall be continuing at any time during any Lease Period, then on the last
 day of such Lease Period, Lessee shall pay to the Pass Through Trustee on
 behalf of the US Airways Pass Through Trust 1998-C the amount which has
 accrued during such Lease Period in accordance with the following sentence
 and which remains unpaid on such Lease Period Date (such amount, the "Class
 C Special Indemnity Payment").  The Class C Special Indemnity Payment shall
 accrue during each Lease Period at a daily rate equal to the Multiplier, in
 effect from time to time during such Lease Period, multiplied by the
 aggregate principal amount of the Series C Equipment Notes outstanding on
 such date divided by 360.  The Pass Through Trustee agrees that it will
 accept and receive the Class C Special Indemnity Payment on behalf of the
 US Airways Pass Through Trust 1998-C and that it will distribute the Class
 C Special Indemnity Payment in accordance with the Trust Agreement for the
 US Airways Pass Through Trust 1998-C. 

      SECTION 7.     REPRESENTATIONS, WARRANTIES AND COVENANTS.

           (a)  Covenants Regarding Citizenship.  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 Transportation Code
 and regulations then applicable thereunder, then the Owner Participant
 shall (at its own expense and without any reimbursement or indemnification
 from Lessee) as soon as practicable, but in any event within 60 days of
 obtaining knowledge of  such ineligibility or loss of citizenship 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 Equipment Note 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 7(a) proving to be untrue as of the Delivery Date; and (B)
 the Owner Participant shall be liable 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
 7(a).  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 7(a).  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 Transportation Code 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 7(a), the Owner Trustee, the Indenture Trustee
 and the Participants hereby agree that a Lease Default or Lease Event of
 Default shall not have occurred and be continuing due to non-compliance by
 Lessee with the registration requirements in the Lease.

           (b)  Location of Records.  First Security Bank, National
 Association, in its individual capacity,  agrees that it will not change
 the location of its principal place of business or the office where it
 maintains its books and records with respect to the Aircraft and the Trust
 Estate to a location outside of Salt Lake City, Utah, without prior written
 notice to all parties. 

           (c)  Securities Act.  Each Loan Participant represents and
 warrants that neither it nor anyone acting in its behalf has offered any
 Equipment Notes for sale to, or solicited any offer to buy any Equipment
 Note from, any person or entity other than in a manner in compliance with,
 and which does not require registration under, the Securities Act or the
 rules and regulations thereunder.

           (d)  Reregistration.  The Owner Participant, the Indenture
 Trustee, the Pass Through Trustee and each Loan Participant agree that, at
 any time after the Depreciation Period, so long as no Lease Event of
 Default shall have occurred and be continuing, Lessee may elect to effect a
 change in registration of the Aircraft, at Lessee's cost and expense, so
 long as the country of registry of the Aircraft is a country listed on
 Exhibit A.  Upon the request of the Lender, Exhibit A shall be amended from
 time to time to include any other country which the Owner Participant and
 the Indenture Trustee have determined, acting reasonably, would provide
 substantially equivalent protection for the rights of owner participants,
 lessors or lenders in similar transactions as provided under the laws of
 the United States and the states thereof.   In order for Lessee to effect a
 change in the country of registry of the Aircraft, Lessee shall deliver to
 the Owner Participant, the Owner Trustee (in its individual capacity) and
 the Indenture Trustee the following:

      (I)  an Officer's Certificate to the effect that (A) the insurance or
           self-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, (B) all
           indemnities in favor of the Owner Participant, the Owner Trustee
           (in its individual capacity and as trustee under the Trust
           Agreement) and the Indenture Trustee under any Operative Document
           afford each such party substantially the same protection as
           provided prior to such change of registry, (C) the lien of the
           Trust Indenture in favor of the Trustee will continue as a first
           priority lien following such change of registry, (D) such change
           will not result in the imposition of, or increase in the amount
           of, any Tax for which Lessee is not required to indemnify, or is
           not then willing to enter into a binding agreement to indemnify,
           the Owner Participant, the Certificate Holders, the Indenture
           Trustee, the Owner Trustee (in its individual capacity and as
           trustee under the Trust Agreement), the Indenture Trustee or the
           Trust Estate pursuant to this Agreement or the Tax Indemnity
           Agreement, and  (E) that the new country of registry imposes
           aircraft maintenance standards not materially less stringent from
           those of any Permitted Foreign Air Authority; and 

      (II) a favorable opinion (subject to customary exceptions) of counsel
           (opinion and counsel reasonably acceptable to the Owner
           Participant) addressed to the Owner Participant and the Indenture
           Trustee, from counsel of recognized reputation qualified in the
           laws of the relevant jurisdiction to the effect that:  (A) 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); (B) 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 register or qualify to do
           business in such jurisdiction; (C) 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); (D) 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; and
           (E) 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) 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). 

 Upon receipt of the foregoing certificate and opinion, the Owner
 Participant and the Indenture Trustee will instruct the Owner Trustee to
 make such change of registration.   

           Lessee shall pay all reasonable 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. 

           (e)  Owner Participant Representations and Warranties.  The Owner
 Participant represents and warrants to Lessee, the Owner Trustee, 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 the State 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 principles of equity, whether considered in a proceeding at
      law or in  equity; [and the Owner Participant is a Qualified Owner
      Participant;(1) ]

 ----------------------
 (1)     Not applicable to transactions with John Hancock
         Leasing Corporation or MarCap Corporation.

           (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 Transportation Code 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 Participation 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 Equipment Note or Pass Through Trust
      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 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).

           (f)  Lessor Liens.  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 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
 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 6.

           (g)  Quiet Enjoyment.  Each Loan Participant and each of the
 Indenture Trustee, the Subordination Agent, the Owner Trustee, the Pass
 Through Trustee and the Owner Participant covenants and agrees that, so
 long as no Lease Event of Default shall have occurred and be continuing and
 the Lessee has not been duly declared in default and, notwithstanding
 default by any Loan Participant, the Indenture Trustee, the Owner Trustee,
 the Pass Through Trustee or the Owner Participant, that such Person shall
 not (and shall not permit any Affiliate or other Person claiming by,
 through or under it to) 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
 Transactions during the Term of the Lease, and the Lease shall not be
 terminated except as expressly provided therein.

           (h)  Equipment Notes Acquired for Investment.  Each Loan
 Participant represents and warrants that the Equipment Note 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
 Equipment Note issued to it), except that the Loan Participants may sell,
 transfer or otherwise dispose of any Equipment Note or any portion thereof,
 or grant participations therein, in a manner which in itself does not
 require registration under the Securities Act.

           (i)  [Reserved.]

           (j)  Representations, Warranties and Covenants of Indenture
 Trustee.  State Street Bank and Trust Company represents, warrants (as of 
 the Delivery Date) and covenants, in its individual capacity, to Lessee,
 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
      the Commonwealth 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
      Equipment Notes;

           (ii) the execution and delivery by the Indenture Trustee of the
      Indenture Trustee Documents and the authentication of the Equipment
      Notes 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 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 Liens on the Aircraft or any
      portion of the Trust Estate.

           (k)  Owner Participant Transfers.  So long as the Aircraft shall
 be leased to the Lessee under the Lease, 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 under the Operative Documents to which the
 Owner Participant is a party in form and substance reasonably satisfactory
 to Lessee, the Owner Trustee, and the Indenture Trustee, or (C) is an
 affiliate of the Owner Participant and the Owner Participant agrees to
 remain liable for all obligations of the Owner Participant under the
 Operative Documents; provided, further, that any Transferee shall not be an
 airline, a commercial aircraft operator, an air freight forwarder, an
 entity engaged in the business of parcel transport by air or other similar
 Person or an Affiliate thereof.  Each such transfer to a Transferee shall
 be subject to the conditions that (S) 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 contemplated hereby, (T) 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 Lessee and the Owner Trustee 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 7(k) as to the guarantor, (U) the Transferee
 enters into an agreement or agreements, in form and substance reasonably
 satisfactory to the Owner Trustee and Lessee, 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, (V) such transfer does
 not affect registration of the Aircraft under the Transportation Code, 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 or any other applicable Federal or state law and the Lessee
 shall be entitled to require an opinion of counsel to such effect, (W) the
 transferor Owner Participant assumes the risk of any adverse tax
 consequences with respect to the true lease nature of the transaction
 (including, without limitation, loss of depreciation and amortization
 deductions and interest deductions resulting from such transfer, (X) the
 transferor Owner Participant pays all of the reasonable costs and expenses
 (including, without limitation, the reasonable fees and expenses of
 counsel) incurred in connection with such transfer, including the
 reasonable costs and expenses of the Owner Trustee, the Indenture Trustee,
 Lessee and the Loan Participants in connection therewith without the right
 of indemnification or reimbursement by Lessee, (Y) the terms of the
 Operative Documents and the Transactions shall not be altered and (Z) such
 transfer will not give rise to a Default under the Trust Indenture or an
 Indenture Event of Default.  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.  If the Owner Participant intends to transfer any of its
 interests hereunder, it shall give thirty (30) days prior written notice
 thereof to the Indenture Trustee, the Owner Trustee and Lessee, specifying
 the name and address of the proposed Transferee and providing the financial
 statements of such proposed Transferee.

           (l)   Reserved.

           (m)  Compliance with Trust Indenture.  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.

           (n)  ERISA Matters.  The Owner Participant represents and
 warrants as of the Delivery Date that it is not acquiring or holding its
 interest in the Trust Estate, any Equipment Note or any interests
 represented thereby with the 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, including, without limitation, as
 applicable, an insurance company general account ("Plan Accounts").  Each
 Loan Participant agrees that it will not transfer any Equipment Note (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
 Equipment Note (or any part thereof) constitutes Plan Assets or that such
 purchase and holding will not control or result in a prohibited transaction
 (as defined in Section 4975 of the Code and 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 prohibited
 transaction (as defined in Section 4975 of the Code and ERISA).  The Pass
 Through Trustee agrees that it will not agree to any amendment,
 modification or waiver of Section 1.01(e)(1) of the initial supplement to
 each Pass Through Trust Agreement without the prior written consent of the
 Owner Participant.

           (o)  Confidentiality of Purchase Agreement.  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 Equipment Notes (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.

           (p)  Margin Regulations.  The Owner Trustee and the Owner
 Participant severally, not jointly, represent and warrant, as of the
 Delivery Date 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.

           (q)  Loan Participant Liens.  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.

           (r)  Indenture Trustee Liens.  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.

           (s)  Representations and Warranties of Owner Trustee.  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 Pass
 Through Trustee, the Subordination Agent, the Liquidity Provider and the
 Owner Participant as follows:

           (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 Equipment Notes, 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 (or, in the case
      of Owner Trustee Documents to be executed on the Delivery Date, will
      on the Delivery Date, execute and deliver) 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 constitutes (or, in the case
      of documents to be executed and delivered on the Delivery Date, upon
      execution and delivery will 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, 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 Closing Date shall have duly issued,
      executed and delivered to the Indenture Trustee for authentication,
      the Equipment Notes pursuant to the terms and provisions hereof and of
      the Trust Indenture, and each Equipment Note on the Closing 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 Equipment Note 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 Equipment Notes, or
      any other Operative Document to which it is or will be a party or by
      which it is or will be 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 attributable to the Owner
      Trustee, in its individual capacity;

           (vii)     there exists no Lessor Lien 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 Equipment Notes, 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 Equipment Note or
      Pass Through 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 refinancing 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
      Equipment Note, 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);

           (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 Indenture Event of Default
      which has been caused by or relates to the Owner Trustee, in its
      individual capacity, and which is presently continuing; and

           (xiv)     on the Delivery Date the Owner Trustee shall have
      received whatever title to the Aircraft as was conveyed to it by
      Lessee.

           (t)  Owner Participant Obligations on Lease Termination.  The
 Owner Participant covenants and agrees that if (i) Lessee has elected
 pursuant to Section 9(a)(1) of the Lease to terminate the Lease by causing
 the Aircraft to be sold pursuant to Section 9(b) of the Lease and (ii) the
 Owner Trustee has, pursuant to Section 9(b) 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(b) of the Lease 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. 
           (u)  Transfer of Title; Assumption of Equipment Notes.  Each of
 the Owner Participant, the Owner Trustee, the Indenture Trustee and Lessee
 covenants and agrees that if Lessee elects (A) to purchase the Aircraft
 pursuant to Section 19(b) of the Lease or (B) to terminate the Lease and
 purchase the Aircraft pursuant to Section 19(c) 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 Equipment Notes 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 Equipment Notes, 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 provisions of this Section
 7(u), unless waived by the Loan Participants, Lessee shall not be entitled
 to assume the Equipment Notes on the date for purchase of the Aircraft
 pursuant to Section 19(c) of the Lease if on such date a Specified Default
 or Lease Event of Default shall have occurred and be continuing.

           Notwithstanding the foregoing, Lessee shall not be entitled to
 assume the obligations of the Owner Trustee in respect of the Equipment
 Notes 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 will be entitled to the
 benefits of 11 U.S.C. Section 1110; provided that the opinion required by
 subclause (ii) need only be given if immediately prior to such assumption
 the Owner Trustee would have been entitled to the benefits of 11 U.S.C.
 Section 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 taxation in the same amounts, in the same
 manner, and at the same times as would have been the case if such
 assumption had not occurred.

           (v)   Lessee Merger Covenant.  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 (i) organized and validly existing under the laws of the
      United States of America or any state thereof or the District of
      Columbia, (ii) a "citizen of the United States" as defined in 49
      U.S.C. Section 40102(a)(15), as amended, and (iii) a Certificated Air
      Carrier, if and so long as such status is a condition of entitlement
      to the benefits of Section 1110 of the Bankruptcy Code with respect to
      the Lease or the Aircraft;

           (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 Owner Participant a duly authorized,
      valid, binding and enforceable agreement containing an assumption by
      such successor corporation or Person of the due and punctual
      performance and observance of each covenant and condition of the
      Operative Documents to which Lessee is a party to be performed or
      observed by Lessee;

           (iii)     immediately after giving effect to such transaction, no
      Lease Event of Default 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
      or any Vice President and by the Secretary or an Assistant Secretary
      of Lessee, and an opinion of counsel (which may be Lessee's General
      Counsel, Deputy General Counsel or Associate General Counsel)
      reasonably satisfactory to the Owner Participant, each to the effect
      that such consolidation, merger, conveyance, transfer or lease and the
      assumption agreement mentioned in clause (ii) above comply with this
      Section 7(v) 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 Section 7(v), 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
 Section 7(v) from its liability in respect of any Operative Document to
 which it is a party. 

           (w)  Further Assurances.  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 ownership
 interest of the Owner Trustee in the Aircraft or will furnish to the Owner
 Trustee, the Owner Participant 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 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.

           (x)  Rent Adjustments.  Section 3 of the Lease contemplates that,
 under certain circumstances, the Owner Participant will make certain
 recalculations of Basic Rent, EBO Amount and Termination Value, 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.

           (y)  Owner Participant Costs on Return.  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 of the Lease without the right of reimbursement or
 indemnification from Lessee.

           (z)  Transfer of Equipment Notes.  Each Loan Participant hereby
 represents, warrants and agrees that it shall not transfer any interest in
 any Equipment Note 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
 7(c), 7(h), 7(i), 7(n), and 7(q) hereof and this Section 7(z) and Sections
 2.03, 2.14 and 4.03 of the Trust Indenture).

           (aa)  Representations and Warranties of Pass Through Trustee. 
 The Pass Through Trustee represents and warrants to Lessee, 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 state chartered trust company
      duly organized, 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 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;

           (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 Equipment Notes 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
      Commonwealth of Massachusetts 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 Massachusetts 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 Commonwealth of Massachusetts 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
      Commonwealth of Massachusetts or any political subdivision thereof in
      connection with the acquisition, possession or ownership by the Pass
      Through Trustee of any of the Equipment Notes (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 the trusts created by the Pass Through
      Trust Agreements will not be taxable as corporations, but rather, each
      will be characterized either 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 Commonwealth of
      Massachusetts 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 Pass Through Trust
      Certificates contemplated hereby, the Pass Through Trustee has not
      directly or indirectly offered any Equipment Note for sale to any
      Person or solicited any offer to acquire any Equipment Notes from any
      Person, nor has the Pass Through Trustee authorized anyone to act on
      its behalf to offer directly or indirectly any Equipment Note for sale
      to any Person, or to solicit any offer to acquire any Equipment Note
      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 or Lessee.

           (bb)  Representations and Warranties of Subordination Agent.  The
 Subordination Agent represents and warrants to Lessee, 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 a state chartered trust company
      duly organized, 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, the
      Liquidity Facilities and the Intercreditor 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 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 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);

           (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 Equipment Note for sale to any Person or solicited any
      offer to acquire any Equipment Notes from any Person, nor has the
      Subordination Agent authorized anyone to act on its behalf to offer
      directly or indirectly any Equipment Note for sale to any Person, or
      to solicit any offer to acquire any Equipment Note 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 or Lessee.

      SECTION 8.     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, warranties and covenants
 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 6(c)
 hereof, and may rely on such indemnities to the same extent as if such
 indemnities were made to the Liquidity Provider directly.

      SECTION 9.     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 and the Indenture Trustee.  Notwithstanding
 the foregoing, so long as the Lease has not been terminated, the
 Subordination Agent, the Pass Through Trustee, the Indenture Trustee, the
 Owner Participant and the Owner Trustee hereby agree for the benefit of
 Lessee that without the consent of Lessee they will not amend, modify or
 supplement the definition of "Secured Obligations" or Articles II, III, IX
 or Section 5.02 of the Trust Indenture.  Furthermore, so long as the Lease
 has not been terminated, the Pass Through Trustee, the Subordination Agent,
 the Indenture Trustee, the Owner Participant and the Owner Trustee hereby
 agree for the benefit of Lessee that without Lessee's consent, each such
 party will not amend any other provision of any Operative Document or Pass
 Through Document in a manner adversely affecting Lessee.  Each of the Owner
 Participant, the Indenture Trustee, the Subordination Agent, the Pass
 Through 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 or Pass Through Documents to which Lessee is not a
 party.  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 10.    CERTAIN COVENANTS OF LESSEE.  Lessee covenants and
 agrees with each of the Loan Participants, the Owner Participant, the
 Indenture Trustee and the Owner Trustee,  as follows:

           (a)  Further Assurances.  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 Transportation Code, or shall furnish to the Owner Trustee
 such information as may be required to enable the Owner Trustee to make
 application for such registration (at the expense of Lessee), 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 (including tax authorities).

           (b)  Filings.  Lessee, at its expense, 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 Transportation Code, 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 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 11.     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 12.    NOTICES; CONSENT TO JURISDICTION.

           (a)  Notices.  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 Agreement on the day that such writing is delivered to the recipient
 thereof in accordance with the provisions of this Section 12(a).  Unless
 otherwise specified in a notice sent or delivered in accordance with the
 foregoing provisions of this Section 12(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 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 Equipment Note register maintained pursuant to Section 2.07 of
 the Trust Indenture.

           (b)  Consent to Jurisdiction.  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
 by such courts; provided, however that the foregoing shall not apply to the
 right any party may have to seek removal of such suit, action or proceeding
 to federal court or to seek consolidation of any separate actions, suits or
 proceedings brought by one or more of the other parties in the same or
 different jurisdictions.   The agreement set forth in this Section 12(b) is
 given solely for the benefit of the parties hereto and shall not inure to
 the benefit of any other Person. 

      SECTION 13.     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 6(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 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, and (D) the Owner Participant and the Indenture Trustee shall
 have received an opinion or opinions of counsel (reasonably satisfactory to
 the Owner Participant), in scope, form and substance satisfactory to the
 Owner Participant 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 6(b) hereof (taking into account
 any additional indemnification provided by Lessee pursuant to clause (A) of
 this sentence), and (IV) if such removal involves the replacement of the
 Owner Trustee, an opinion of counsel to such successor Owner Trustee in
 form and substance reasonably satisfactory to the Owner Participant
 covering the matters described in the opinion delivered pursuant to Section
 4(a)(xiii) and such other matters as the Owner Participant may reasonably
 request, and (E) 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.  Notwithstanding
 anything to the contrary contained herein or in any other Operative
 Document, the Owner Participant agrees with Lessee that it will not consent
 to or direct a change in the situs of the Trust Estate without the prior
 consent of Lessee unless the Owner Trustee, the Indenture Trustee, the
 Certificate Holders and the Trust Estate each waives its right to any
 indemnity payable by the Lessee under Section 6(b) as a result of the
 change in situs.

      SECTION 14.    MISCELLANEOUS.

           (a)  Consents Under Lease.  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.

           (b)  Survival.  The representations, warranties, indemnities and
 agreements of Lessee, the Owner Trustee, the Indenture Trustee, the
 Subordination Agent, the Pass Through Trustee and the Owner Participant
 provided for in this Agreement or any other Operative Document, and
 Lessee'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
 Equipment Note or the Trust Indenture Estate and the expiration or other
 termination of this Agreement or any other Operative Document. 

           (c)  Counterparts.  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.

           (d)  Amendments and Waivers.  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.

           (e)  Successors and Assigns.  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 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.

           (f)  Governing Law.  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.

           (g)  Trust Capacity.  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 14(g) 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 Section 14(g) 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 14(g) shall survive the
 termination of this Agreement and the other Operative Documents.

           (h)  Section 1110.  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. Section  1110 in the event of any reorganization of Lessee under
 such Section.

      SECTION 15.    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.  The Owner Participant agrees
 to transfer to the Owner Trustee promptly such amount as shall be necessary
 in order to enable the Owner Trustee to pay, or if previously paid by
 Lessee, to reimburse Lessee for, 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 and, to the extent such invoices have previously been paid
 by Lessee, to reimburse Lessee promptly therefor.  Notwithstanding the
 foregoing, to the extent that Transaction Expenses exceed 2% 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 2% 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 16.     REFINANCINGS.

           (a)   Refinancing Generally.  So long as no Lease Event of
 Default shall have occurred and be continuing, Lessee shall have the right
 to refinance all (but not less than all) of the Equipment Notes no more
 than three times by giving written notice to the Owner Participant and the
 Owner Trustee that there shall be effected a voluntary redemption of the
 Equipment Notes 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
 or in the principal amount of the Equipment Notes; and provided further
 that the Owner Participant may reject any terms that, in its reasonable 
 judgment, materially and adversely affect the Owner Participant.

           Upon such agreement: 

                (1)  within ten (10) 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) (based upon information provided by Lessee and on
           the agreement reached between Lessee and the Owner
           Participant) the proposed date on which the outstanding
           Equipment Notes will be redeemed and a description of any
           new debt to be issued and the other aspects of such
           refinancing that will be consummated (such date, the
           "Refinancing Date") and (ii) the following information
           calculated pursuant to the provisions of paragraph (6) of
           this Section 16(a):  (A) 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, EBO Amount, Termination
           Value percentages and other purchase option or termination
           percentages.  The Refinancing Certificate shall not provide
           for a debt/equity ratio of more than [_: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, EBO
           Amount, Termination Value percentages and other buyout and
           termination 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 (A) (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 Equipment Notes
           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 Equipment
           Notes in connection with the first refinancing under this
           Section 16, (ii) the application of the proceeds of the sale
           of the New Debt to the redemption of all such Equipment
           Notes 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 and (B)
           pursuant to which the parties to the refinancing transaction
           (including the Owner Participant, the Lessee, the Owner
           Trustee and the Loan Participants, but excluding the holders
           of the Pass Through Certificates) make such representations,
           warranties and covenants as Lessee and Owner Participant
           reasonably require;

                (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 EBO Amount 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 Equipment Notes 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;

                (5)  the Lessee shall pay all of the reasonable
           expenses of such refinancing (including, but not limited to,
           the reasonable fees, expenses and disbursements of counsel
           and any placement or underwriting fees); 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 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).  All adjustments to Basic Rent, EBO Amount and
           Termination Value shall also be in compliance with the tests
           of Sections  4.02(5) and 4.07 of Rev. Proc. 75-28 and with
           one or more of any "safe harbors" from characterization of
           the Lease as a "disqualified leaseback or long-term
           agreement" set forth in Section 467 of the Code (or any
           proposed, temporary or final regulations thereunder
           applicable to the Lease) or, if no "safe harbor" exists,
           made in a manner to avoid characterization of the Lease as a
           "disqualified leaseback or long-term agreement" within the
           meaning of Section 467 of the Code.

           (b)  Limitation on Redemption.  The Equipment Notes 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.



           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. 

                                 US AIRWAYS, INC., 
                                   Lessee 


                                 By:__________________________________  
                                 Name:   
                                 Title:  
                                 Address:  2345 Crystal Drive 
                                           Arlington, Virginia 22227 

                                 Attn: 
                                 Telecopy: 

                                 [OWNER PARTICIPANT],  
                                   as Owner Participant 
                                 By:_________________________________  
                                 Name:   
                                 Title:  
                                 Address: ___________________________  
                                          ___________________________ 
                                          ___________________________  
                                 Attn: 


                                 STATE STREET BANK AND  
                                 TRUST COMPANY, 
                                 not in its individual capacity 
                                 except as otherwise provided herein, 
                                 but solely as Indenture Trustee 


                                 By:_________________________________  
                                 Name:   
                                 Title:  
                                 Address:  Two International Place, 4th Floor 
                                           Boston, Massachusetts 02110 



                                 FIRST SECURITY BANK, 
                                 NATIONAL ASSOCIATION, 
                                 not in its individual capacity, except as 
                                 expressly provided herein, but solely as
                                 Owner Trustee  


                                 By:_________________________________   
                                 Name:   
                                 Title:  
                                 Address:  79 South Main Street, 3rd Floor 
                                           Salt Lake City, Utah 84111 


                                 STATE STREET BANK AND TRUST 
                                 COMPANY, not in its individual capacity, 
                                 except as otherwise provided herein, but 
                                 solely as Pass Through Trustee 


                                 By:_________________________________ 
                                 Name:   
                                 Title:  
                                 Address:  Two International Place, 4th Floor 
                                           Boston, Massachusetts 02110


                                 STATE STREET BANK AND 
                                 TRUST COMPANY, not in its individual 
                                 capacity, except as otherwise provided 
                                 herein, but solely as Subordination Agent 


                                 By:_________________________________ 
                                 Name:   
                                 Title:  
                                 Address:  Two International Place, 4th Floor 
                                           Boston, Massachusetts 02110 



                                 SCHEDULE I 


                            NAMES AND ADDRESSES 

 Lessee:             US Airways, Inc. 

                     U.S. MAIL 

                     2345 Crystal Drive 
                     Arlington, Virginia  22227 

                     OVERNIGHT COURIER 
                     2345 Crystal Drive 
                     Arlington, Virginia 22227 
                     Attn:  Assistant Treasurer 
                     Telecopy No.:  (703) 872-5936

                     WIRE TRANSFER 
                     PNC Bank, N.A. 
                     ABA No. 043-000-096 
                     Acct. No. 214-7591 
                     Reference:  US Airways, Inc.

 Owner Participant:  ____________________________   

                     U.S. Mail 
                     ____________________________ 
                     ____________________________ 

                     Attn:_______________________ 
                     Telecopy No.:_______________


                     OVERNIGHT COURIER
                     ____________________________ 
                     ____________________________ 

                     Attn:
                     Telecopy No.: (___) ___-____

                     WIRE TRANSFER

                     ABA No._________________
                     Acct. No._________________

  Indenture Trustee, State Street Bank and Trust Company
  Pass Through 
  Trustee and 
  Subordination      
  Agent:             U.S. MAIL

                     Two International Place, 4th Floor
                     Boston, Massachusetts 02110
                     Attn: Corporate Trust Department
                           Ruth A. Smith
                     Telecopy No.: (617) 664-5371

                     OVERNIGHT COURIER
                     Two International Place, 4th Floor
                     Boston, Massachusetts 02110
                     Attn: Corporate Trust Department
                           Ruth A. Smith
                     Telecopy No.: (617) 664-5371

                     WIRE TRANSFER
                     State Street Bank and Trust Company 
                     ABA No. 011-00-0028 
                     for credit to State Street Bank and Trust Company 
                     Acct. No. 9903-990-1 
                     Attn:      Corporate Trust Department 
                                Melissa Lewandowski 
                     Reference: US Airways, Inc. 1998-1/US Airways, Inc.
                                Trust No. N7__UW

 Owner Trustee:      First Security Bank, National Association 

                     U.S. MAIL 

                     79 South Main Street, 3rd Floor 
                     Salt Lake City, Utah 84111 
                     Attn:         Corporate Trust Department 
                     Telecopy No.: (801) 246-5053 

                     OVERNIGHT COURIER 

                     79 South Main Street, 3rd Floor 
                     Salt Lake City, Utah 84111 
                     Attn:         Corporate Trust Department 
                     Telecopy No.: (801) 246-5053 

                     WIRE TRANSFER 

                     First Security Bank, National Association 
                     ABA No.    124000012 
                     Acct. No.  051-0922115 
                     Re:  US Airways, Inc. Trust No. N7__UW



                                SCHEDULE II 

                                COMMITMENTS 


 PERCENTAGE OF 
 PURCHASERS                   INTEREST RATE
 LESSOR'S COST                 AND MATURITY                PURCHASE PRICE
 --------------                -------------               --------------

 US Airways, Inc. 
 Pass Through Trust:

 1998-1A                   6.85% Series A Secured          $__________
 _______%                  Certificates due July 30,
                           2019  

 1998-1B                   7.35% Series B Secured          $__________
 _______%                  Certificates due July 30, 
                           2019

 1998-1C                   6.82% Series C Secured          $__________
 ______%                   Certificates due January 30, 
                           2016   

 OWNER PARTICIPANT                             EQUITY INVESTMENT

     _____%                                       $__________


 100%                      Total Commitments      $__________




                                SCHEDULE III 

      PASS THROUGH TRUST AGREEMENT AND PASS THROUGH TRUST SUPPLEMENTS 


 Pass Through Trust Agreement, dated as of December 4, 1998, between US
 Airways, Inc. and State Street Bank and Trust Company, as supplemented by
 Trust Supplement No. 1998-1A, dated as of December 14, 1998, as
 supplemented by Trust Supplement No. 1998-1B, dated as of December 14,
 1998, and as supplemented by Trust Supplement No. 1998-1C, dated as of
 December 14, 1998.




                                 EXHIBIT A 
                         TO PARTICIPATION AGREEMENT 

                   (US Airways, Inc.  Trust No.  N7__UW) 

                  SCHEDULE OF COUNTRIES FOR REREGISTRATION 


                Australia           Malta 
                Austria             Mexico 
                Bahamas             Netherlands 
                Belgium             New Zealand 
                Bermuda             Norway 
                Brazil              People's Republic of China 
                Canada              Philippines 
                Denmark             Portugal 
                Finland             Republic of China (Taiwan)* 
                France              Singapore 
                Germany             South Korea 
                Grenada             Spain 
                Greece              Sweden 
                Iceland             Switzerland 
                India               Thailand 
                Ireland             Tobago 
                Italy               Trinidad 
                Jamaica             Turkey 
                Japan               United Kingdom 
                Luxembourg          Venezuela 
                Malaysia                                 

             *So long as on the date of registration such country and the
 United States have diplomatic relations at least as good as those in effect
 on the Delivery Date. 





                                                           Form Definitions 
                                                                     N7__UW


                                                                    ANNEX A 


                                DEFINITIONS 
                   (US Airways, Inc.  Trust No.  N7__UW) 

           The following terms shall have the following meanings for all
 purposes of the Operative Documents referred to below, unless otherwise
 defined in an Operative Document or the context thereof shall otherwise
 require and such meanings shall be equally applicable to both the singular
 and the plural forms of the terms herein defined.  In the case of any
 conflict between the provisions of this Annex A and the provisions of the
 main body of any Operative Document, the provisions of the main body of
 such Operative Document shall control the construction of such Operative
 Document. 

           Except as otherwise provided herein, all references to any
 agreement defined in this Annex A shall be deemed to include such agreement
 as the same may from time to time be amended, supplemented or otherwise
 modified in accordance with its terms and, where applicable, the terms of
 the other Operative Documents.  All references to statutes, rules and
 regulations shall be deemed to include all amendments, replacements and
 successors thereto unless otherwise specified herein. 

           "Acceptable Alternate Engine" means (i) a CFM International Model
 56-5 (or improved type) engine having not less than 1,500 cycles left
 before such engine's next scheduled maintenance overhaul or (ii) an engine
 of the same or another manufacturer suitable for use on the Airframe and
 having a value and utility equal to or greater than a CFM Model 56-5 type
 engine, assuming such engine is in the condition required by the Lease. 

           "Acceptance Certificate" has the meaning specified for such term
 in Section 4(a)(v) of the Participation Agreement. 

           "Actual Knowledge" means, (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. 

           "Additional Insured" means Lessor, in its individual capacity and
 as owner of the Aircraft, the Indenture Trustee, the Owner Participant, the
 Pass Through Trustee, the Liquidity Provider, Lessee in its capacity as
 sublessor under any Sublease, and each of their respective Affiliates,
 successors and permitted assigns, and the respective directors, officers,
 employees and agents of the foregoing. 

           "Additional Parts" has the meaning specified for such term in
 Section 8(c) of the Lease. 

           "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. 

           "AIFS" means Airbus Industrie Financial Services, a corporation
 formed under the laws of Ireland. 

           "Aircraft" means the Airframe to be delivered and leased under
 the Lease (or any airframe from time to time substituted for such Airframe
 pursuant to Section 10(a) of the Lease) together with the two Engines
 initially leased under the Lease (or any engine substituted for either of
 such Engines pursuant to the terms of the Lease), in each case as specified
 in the Applicable Lease Supplement, 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 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 under the
 Lease 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) of the Lease; 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 of the Lease 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 under
 the Lease in substitution for the Airframe pursuant to the applicable
 provisions of the Lease, the replaced Airframe shall cease to be an
 Airframe under the Lease; provided further that the Airframe shall not
 include Passenger Convenience Equipment. 

           "Amortization Amount" means, with respect to any Principal Amount
 Repayment Date, the amount set forth opposite such Date as the Principal
 Amount to be repaid on the Amortization Schedule. 

           "Amortization Schedule" means the amortization schedule for the
 Equipment Notes delivered pursuant to Section 2.02 of the Trust Indenture.  

           "Applicable Rate" means as of any date the weighted average of
 the interest rates borne by the Equipment Notes then outstanding and, if no
 Equipment Notes 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
 Chase Manhattan, 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(b) of the Lease as adjusted as provided in
 Section 3(c) of the Lease but subject always to the provisions of Section
 3(c)(v) of the Lease and, for any Renewal Term, Basic Rent determined
 pursuant to Section 19 of the Lease. 

           "Basic Term" means the term for which the Aircraft is leased
 pursuant to Section 3(a) of the Lease, commencing on the Delivery Date and
 ending on the Basic Term Expiration Date.  

           "Basic Term Expiration Date"  means              , or such 
 earlier date as the Lease may be terminated in accordance with the 
 provisions thereof. 

           "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 Permitted Liens. 

           "Burdensome Termination Event"  means an event which shall be
 deemed to have occurred if (A) one or more events have occurred which give
 rise to an obligation on the part of Lessee to pay or indemnify any costs
 or expenses under Sections 6(b) or 6(c) of the Participation Agreement or
 under the Tax Indemnity Agreement if the aggregate amount of such indemnity
 or other payments would exceed (as to future payments on a present value
 basis discounted at the Debt Rate) 2.50% of Lessor's Cost or  (B) Lessee
 plans non-severable improvements to the Aircraft which (i) are necessary or
 desirable in Lessee's sole discretion, (ii) are expected to cost in excess
 of $2.5 million and (iii) the Owner Participant will not permit to be
 financed under similar terms then available in the market for similar
 transaction. 

           "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, Pittsburgh, Pennsylvania
 or the city and state where the office of the Owner Trustee is located. 

           "Cash Equivalents" means (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 Corporation ("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 of 5% of such bank's capital and surplus.  

           "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 for such
 term 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. 

           "Class A Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class B Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class C Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class C Purchase Agreement" means that certain Purchase
 Agreement, dated as of December 14, 1998, by and between Lessee and AIFS. 

           "Class C Special Indemnity Event" means the existence of any
 condition or event which, pursuant to Section 3 of the Registration
 Agreement, requires US Airways, Inc. to pay liquidated damages to the US
 Airways Pass Through Trust 1998-C in accordance with such Section 3,
 subject to the last sentence of the first paragraph of Section 3 of the
 Registration Agreement. 

           "Code" means the Internal Revenue Code of 1986, as amended.   

           "Commitment" means the commitment pursuant to the Participation
 Agreement of a Pass Through Trustee or of the Owner Participant, as the
 case may be, to finance the Owner Trustee's payment of Lessor's Cost for
 the Aircraft.  

           "Consent and Agreement" means the Consent and Agreement (US
 Airways, Inc. Trust No. N7__UW), dated as of the date of the Lease,
 executed by the Seller, as the same may be amended, modified or
 supplemented from time to time in accordance with the applicable provisions
 thereof. 

           "Continuous Stay Period" has the meaning specified for such term
 in Section 4.04(a) of the Trust Indenture. 

           "Corporate Trust Office" means the principal office of the
 Indenture Trustee located at Two International Place, 4th Floor, 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 Note
 Holder.  

           "Debt" means 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" means, 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).  

           "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 under the Lease.  

           "Delivery Notice" means the notice of delivery delivered pursuant
 to Section 2(c) of the Participation Agreement. 

           "Depositaries" means collectively, Credit Suisse First Boston,
 New York Branch and Citibank, N.A.  

           "Depreciation Period" means the period commencing on the Delivery
 Date and ending at the end of the calendar year during which the seventh
 (7th) anniversary of the Delivery Date occurs, or such earlier date as the
 Lease may be terminated in accordance with the provisions of the Lease.  

           "Designated Interest Rate" has the meaning specified for such
 term in Section 2.02 of the Trust Indenture. 

           "Dollars" and "$" mean the lawful currency of the United States
 of America. 

           "EBO Amount" means the applicable amount for the relevant EBO
 Date set forth on Exhibit D to the Lease. 

           "EBO Date" means the applicable date set forth on Exhibit D to
 the Lease. 

           "Enforcement Date" has the meaning specified for such term in
 Section 4.03 of the Trust Indenture. 

           "Engine" means (i) each of the two CFM International 56-5 type
 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 Acceptable Alternate Engine that may from time to time be
 substituted, pursuant to the terms of the Lease, for either 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 of the Lease after removal from such Engine; provided,
 however, that at such time as an engine shall be deemed part of the
 property leased under the Lease in substitution for an Engine pursuant to
 the applicable provisions of the Lease, the replaced Engine shall cease to
 be an Engine under the Lease.  The term "Engines" means, as of any date of
 determination, all Engines then leased under the Lease.  

           "Equipment Note Holder" has the meaning specified for such term
 in Section 2.07 of the Trust Indenture. 

           "Equipment Notes" means and include any Equipment Notes issued
 under the Trust Indenture, and issued in exchange therefor or replacement
 thereof.  

           "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" (i) when such term is used in or with respect
 to the Lease has the meaning specified for such term in Section 14 of the
 Lease and (ii) when such term is used in or with respect to the Trust
 Indenture has the meaning specified for such term  in Section 4.02 of the
 Trust Indenture. 

           "Event of Loss" means, with respect to the Aircraft, Airframe or
 any Engine, 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 for a period in excess of one hundred eighty
 (180) days or, if earlier, the expiration of the Term; (iv) the requisition
 for use of such property by any governmental authority (other than a
 requisition for use by the United States Government or any government of
 registry of the Aircraft or any agency or instrumentality thereof) that
 shall have resulted in the loss of possession of such property by Lessee
 (or any Sublessee) for a period in excess of one hundred eighty (180)
 consecutive days or, if earlier, the expiration of the Term; (v) the
 requisition for use by the United States Government or any government of
 registry of the Aircraft or any instrumentality or agency thereof, which
 shall have occurred during the Basic Term (or any Renewal Term) and shall
 have continued for a period of 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) of the Lease; (vi) condemnation, confiscation, requisition or
 taking of title of the Aircraft or the Airframe for more than thirty (30)
 days, or if earlier, the expiration of the Term; (vii) 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 one hundred eighty (180) consecutive days, unless Lessee (or
 Sublessee) 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 an "Event of Loss"
 shall occur if such "grounding" extends for a period of more than three
 hundred sixty (360) days (or, if earlier, the expiration of the Term);
 provided that no Event of Loss shall be deemed to occur if such "grounding"
 is applicable to Lessee's entire fleet of A319 aircraft and Lessee, prior
 to the expiration of one year from the prohibition of such use, 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, on a non-discriminatory basis, all steps which are
 necessary or desirable to permit the normal use of the Aircraft by Lessee
 (or such Sublessee), but in any event an "Event of Loss" shall be deemed to
 have occurred if such use shall have been prohibited for a period of two
 consecutive years or such use shall be prohibited at the expiration of the
 Term; and (viii) with respect to an Engine only, any divestiture of title
 to or interest in an Engine or any event with respect to an Engine that is
 deemed to be an Event of Loss with respect to such Engine pursuant to
 Section 7(b) of the Lease.  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. 

           "Excluded Payments" means (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 6(b),
 6(c), 15 or 16 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
 of the Lease in Exhibit H thereto, (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, (vi) provided that the Equipment Notes shall have been duly
 assumed by Lessee pursuant to Section 2.13 of the Trust Indenture, the
 amounts payable to the Owner Trustee pursuant to Section 19(b) of the Lease
 plus all reasonable expenses incurred by the Owner Trustee and the Owner
 Participant in connection with such assumption, as applicable, (vii)
 interest accrued on any of the above, and (viii) any right to enforce the
 payment of any amount described in clauses (i) through (vii) above
 (provided the rights referred to in this clause (viii) shall not be deemed
 to include the exercise of any remedies provided for in the Lease other
 than the right to sue for specific performance of any covenant or to make
 such payment or to sue for damages in respect of the breach of any such
 covenant) and the right to declare an Event of Default in respect of any of
 the foregoing amounts.  Solely for purposes of the Granting Clause of the
 Trust Indenture, amounts payable to AIFS under Section 6(d) of the
 Participation Agreement shall be considered Excluded Payments.   

           "Expenses" means all liabilities, obligations, losses, damages,
 settlements, penalties, claims, actions, suits, costs, expenses and
 disbursements (including, without limitation, reasonable fees and
 disbursements of legal counsel, accountants, appraisers, inspectors or
 other professionals and reasonable costs of investigation). 

           "Fair Market Renewal Term" has the meaning specified for such
 term in Section 19(a)(2) of the Lease. 

           "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 Administration" and "FAA" mean the United
 States Federal Aviation Administration and any agency or instrumentality of
 the United States government succeeding to their functions. 

           "Federal Funds Rate"  means a fluctuating interest rate per annum
 in effect from time to time, which rate per annum shall at all times be
 equal to 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 State Street from three Federal funds brokers of
 recognized standing selected by it. 

           "Fixed Renewal Term" has the meaning specified for such term in
 Section 19(a)(1) of the Lease. 

           "Foreign Air Carrier" means any air carrier which is not a U.S.
 Air Carrier and which performs, or contracts for the performance of,
 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 or any Permitted Foreign Air Authority. 

           "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.   

           "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 Note 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), (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). 

           "Indemnity Agreements" means each of (i) that certain Indemnity
 Agreement, dated as of December 14, 1998, between Citibank, N.A. and Lessee
 and (ii) that certain Indemnity Agreement, dated as of December 14, 1998,
 between Credit Suisse First Boston, New York Branch, and Lessee. 

           "Indenture Agreements" means the Participation Agreement, the
 Lease, the Purchase Agreement, the Purchase Agreement Assignment, the
 Consent and Agreement, the Bills of Sale and any other contract, agreement
 or instrument from time to time assigned or pledged under the Trust
 Indenture.  

           "Indenture Event of Default" has the meaning given the term
 "Event of Default" in the Trust Indenture. 

           "Indenture Excess Amount" has the meaning specified for such term
 in Section 2.03(b) of the Trust Indenture. 

           "Indenture Indemnitees" means (i) State Street and the Indenture
 Trustee, (ii) each separate or additional trustee appointed pursuant to the
 Trust Indenture, (iii) the Subordination Agent, (iv) the Liquidity
 Provider, (v) each Pass Through Trustee, and (vi) each of the respective
 directors, officers, employees, agents and servants of each of the Persons
 described in clauses (i) through (v), inclusive. 

           "Indenture Trustee" means State Street Bank and Trust Company, a
 Massachusetts trust company, not in its individual capacity, but solely as
 Indenture Trustee, 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 and any other agreements between the Indenture
 Trustee and any other party to the Participation Agreement relating to the
 Transactions, delivered on the Delivery Date. 

           "Indenture Trustee Event" means either (i) the Equipment Notes
 shall have become due and payable pursuant to Section 4.04(b) of the Trust
 Indenture, (ii) the Indenture Trustee has taken action or notified 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 or (iii) in the event of a
 reorganization proceeding involving Lessee under Chapter 11 of the
 Bankruptcy Code, (A) the trustee in such proceeding or Lessee not assuming
 or agreeing to perform its obligations under the Lease, as contemplated
 under Section 1110, 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) or (B) at any time after agreeing to
 perform or assuming such obligations, such trustee or Lessee ceasing to
 perform such obligations with the result that the Continuous Stay Period
 comes to an end. 

           "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 6 of the
 Participation Agreement pursuant to said Section 6, 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. 

           "Intercreditor Agreement" means that certain Intercreditor
 Agreement, dated as of the date of the Lease, among the Pass Through
 Trustees, the Liquidity Provider and the Subordination Agent. 

           "Law" means (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" means that certain Lease Agreement (US Airways, Inc. 
 Trust No.  N7__UW), dated as of _________ __, 199_, entered into by the
 Owner Trustee and Lessee concurrently with the execution and delivery of
 the Trust Indenture, 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 the Trust
 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" means any event which with the giving of notice
 or the lapse of time or both would become a Lease Event of Default.  

           "Lease Event of Default" means an "Event of Default" as defined
 in Section 14 of the Lease. 

           "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 _____ 30, 199_ and each succeeding
 _________ 30 and _________ 30, to and including the last such date in the
 Term.  

           "Lease Supplement" means a Lease Supplement, substantially in the
 form of Exhibit A to the Lease, 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 the Lease Agreement, and any subsequent Lease
 Supplement entered into in accordance with the terms of the Lease.  

           "Lessee" means US Airways, Inc., a Delaware corporation.  

           "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, the Tax Indemnity Agreement and each other
 agreement between the Lessee and any other party to the Lease Agreement
 delivered on the Delivery Date. 

           "Lessor" means First Security Bank, National Association, not in
 its individual capacity, but solely as Owner Trustee, or any of its
 successors and permitted assigns acting as lessor under the Lease. 

           "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 6 of the Participation Agreement
 or (iv) claims against Lessor or the 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 the Lease, the transfer
 pursuant to the Trust Indenture or a transfer of the Aircraft pursuant to
 Section 9, 10 or 19 of the Lease or pursuant to the exercise of the
 remedies set forth in Section 15 of the Lease. 

           "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 ABN AMRO Bank, N.V., a bank organized
 under the laws of the Netherlands acting through its Chicago branch,  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 Note 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 for such term in
 Section 10(a) of the Lease. 

           "Majority in Interest of Note Holders" as of a particular date of
 determination means the holders of more than a majority in aggregate unpaid
 Principal Amount of all Equipment Notes outstanding as of such date
 (excluding any Equipment Notes 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 of the Trust Indenture (unless all
 Equipment Notes 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 Equipment Note,
 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 Equipment Note 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 Equipment Note plus
 accrued interest.  For purposes of determining the Make-Whole Amount,
 "Treasury Yield" means, at the time of determination, 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 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 and (B) the other maturing as close as possible
 to, but later than, the Average Life Date, 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 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.  "Average Life Date" means,
 for each Equipment Note to be redeemed, the date which follows the
 redemption date by a period equal to the Remaining Weighted Average Life at
 the redemption date of such Equipment Note.  

           "Manufacturer" means Airbus Industrie G.I.E., a groupement
 d'interet economique established under Ordonnance No. 67-821 dated
 September 23, 1967 of the Republic of France, and its successors and
 assigns. 

           "Manufacturer Documents" means the Purchase Agreement and the
 Consent and Agreement. 

           "Mortgaged Property" has the meaning specified for such term in
 Section 3.03 of the Trust Indenture. 

           "Multiplier" means (i) on any date when no Class C Special
 Indemnity Event is continuing , 0.00, (ii) on each day during the first
 ninety (90)-day period immediately following the occurrence of a Class C
 Special Indemnity Event, 0.0025, and (iii) thereafter, on each day during
 each subsequent ninety (90)-day period for so long as such Class C Special
 Indemnity Event exists, the Multiplier in effect for the immediately
 preceding ninety (90)-day period plus 0.0025; provided, that (a)
 notwithstanding the foregoing, the maximum Multiplier shall be 0.01, and
 (b) the Multiplier shall reset after such Class C Special Indemnity Event
 has ceased or no longer exists and clause (i) shall apply again to any
 subsequent Class C Special Indemnity Event. 

           "Net Economic Return" has the meaning specified for such term in
 paragraph 2 of Exhibit E to the Lease. 

           "Net Present Value of Rents" means the net present value, as of
 the date of calculation, of Basic Rent set forth in Exhibit B to the Lease,
 discounted at an annual interest rate of ten percent (10%) on a semi-annual
 basis. 

           "New Debt" has the meaning specified for such term in Section
 16(a) of the Participation Agreement. 

           "Net Interest and Related Charges" has the meaning specified for
 such term in Section 2.02 of the Trust Indenture. 

           "Note Holder" means any holder from time to time of one or more
 Equipment Notes. 

           "Note Purchase Agreement" means the Note Purchase Agreement dated
 as of the Pass Through Trust Closing Date among Lessee, the Pass Through
 Trustee for the Class A, Class B and Class C Pass Through Trusts, the
 Subordination Agent, First Security Bank, National Association, as Escrow
 Agent, and State Street Bank and Trust Company, as Paying Agent. 

           "Obsolete Parts" has the meaning specified for such term in
 Section 8(c) of the Lease. 

           "Operative Documents" means, collectively, 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
 Equipment Notes, the Bill of Sale, the FAA Bill of Sale, the Purchase
 Agreement (insofar as it relates to the Aircraft), the Purchase Agreement
 Assignment and the Consent and Agreement (each, an "Operative Document"). 

           "Operative Indentures" means each of the indentures under which
 notes have been issued and purchased by the Pass Through Trustees. 

           "Owner Indemnitee" has the meaning specified for such term in the
 definition of Excluded Payments. 

           "Owner Participant" means ___________________, a [_____________]
 corporation, so long as such party shall have any interest in the Trust
 Estate, and transferees thereof as permitted by Section 7(k) of the
 Participation Agreement and Section 8.01 of the Trust Agreement.  

           "Owner Participant Documents" means the Participation Agreement,
 the Trust Agreement, and the Tax Indemnity Agreement and each other
 agreement between the respective parties thereto relating to the subject
 matter thereof, delivered on the Delivery Date.  

           "Owner Trustee" means First Security Bank, National Association,
 not in its individual capacity but solely 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 Equipment Notes and each other agreement
 between the respective parties thereto relating to the subject matter
 thereof, delivered on the Delivery Date. 

           "Owner Trustee's pro rata share" has the meaning specified for
 such term in the Trust Indenture. 

           "Participants" means the Loan Participants and the Owner
 Participant, collectively (each individually, a "Participant"). 

           "Participation Agreement" means that certain Participation
 Agreement (US Airways, Inc.  Trust No.  N7__UW), dated as of the dated of
 the Lease, among the Owner Trustee, the Subordination Agent, the Indenture
 Trustee, Lessee, the Owner Participant and the Pass Through Trustee, 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. 

           "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 of the Lease after removal therefrom; provided
 that "Parts" shall not include Passenger Convenience Equipment.  

           "Pass Through Certificates" means the pass through certificates
 to be issued by the Pass Through Trustee in connection with the
 Transactions.  

           "Pass Through Documents" means the Participation Agreement, the
 Pass Through Trust Agreements and the Intercreditor Agreement. 

           "Pass Through Indemnitees" means (i) the Subordination Agent, the
 Liquidity Provider and the Pass Through Trustee, (ii) each Affiliate of a
 Person described in the preceding clause (i), (iii) the respective
 directors, officers, employees, agents and servants of each of the Persons
 described in the preceding clauses (i) and (ii), and (iv) the successors
 and permitted assigns of the Persons described in the preceding clauses
 (i), (ii) and (iii). 

           "Pass Through Trust" means, collectively, the three separate
 grantor trusts set forth in Schedule III to the Participation Agreement
 created, pursuant to the Pass Through Trust Agreements and each of the Pass
 Through Trust Supplements set forth in Schedule III to the Participation
 Agreement, to facilitate certain of the transactions contemplated by the
 Operative Documents. 

           "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 Trust Closing Date" means December 14, 1998. 

           "Pass Through Trustee" means State Street Bank and Trust Company,
 a Massachusetts trust company, 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. 

           "Passenger Convenience Equipment" means available components or
 systems installed on or affixed to the Airframe that are used to provide
 individual telecommunications or electronic entertainment to passengers
 aboard the Aircraft. 

           "Past Due Rate" has the meaning specified for such term in
 Exhibit B to the Lease. 

           "Payment Date" means each January 30 and July 30, commencing on
 ________  30, ____ (or, if any such day is not a Business Day, the
 immediately succeeding Business Day) until the Equipment Notes have been
 paid in full.  

           "Permitted Foreign Air Authority" means 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 Rijflauchtraatdienst 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). 

           "Permitted Lien" means any Lien referred to in clauses (i)
 through (viii) of Section 6 of the Lease. 

           "Permitted Sublessee" means any entity domiciled in a country
 listed in Exhibit F to the Lease as in effect from time to time and as may
 be modified in accordance with Section 7(d) of the Participation Agreement. 

           "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 Equipment Note, means the
 stated original principal amount of such Equipment Note and, with respect
 to all Equipment Notes, means the aggregate stated original principal
 amounts of all Equipment Notes. 

           "Principal Amount Repayment Date" means each Payment Date on
 which any portion of the Principal Amount is due and payable in accordance
 with the Amortization Schedule. 

           "Purchase Agreement" means the Sale and Purchase Agreement, dated
 as of October 31, 1997, between the Seller and US Airways Group, Inc., as
 the same has been assigned to 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 the Purchase Agreement
 Assignment (US Airways, Inc.  Trust No.  N7__UW), dated as of the date of
 the Lease, between Lessee and Lessor, as the same may be amended,
 supplemented or modified from time to time, with a form of Consent and
 Agreement to be executed by the Seller attached thereto. 

           "Purchase Option Date" has the meaning specified for such term in
 Section 19(b) of the Lease. 

           "Purchasers" means the Pass Through Trustees under each Pass
 Through Trust Agreement. 

           "QIB" has the meaning specified for such term in Section 2.08 of
 the Trust Indenture. 

           "Qualified Owner Participant" means a Person which has a tangible
 net worth, calculated in accordance with generally accepted accounting
 principles, greater than $50,000,000, or a Person whose obligations under
 the Operative Documents are unconditionally guaranteed by such a Person. 

           "Refinancing Certificate" has the meaning specified for such term
 in Section 16(a) of the Participation Agreement. 

           "Refinancing Date" has the meaning specified for such term in
 Section 16(a) of the Participation Agreement. 

           "Refinancing Information" has the meaning specified for such term
 in Section 16(a) of the Participation Agreement. 

           "Registration Agreement" means the Registration Agreement dated
 December 14, 1998 by Lessee, and confirmed and accepted by AIFS, in respect
 of the 6.82% Pass Through Certificates, Series 1998-1, Class C, as such
 Registration Agreement may be amended, modified and supplemented from time
 to time in accordance with the provisions thereof. 

           "Related Indemnitee Group" means, with respect to any Indemnitee,
 any officer, director, servant, employee, agent or Affiliate thereof.  

           "Remaining Weighted Average Life" of a Equipment Note, at the
 redemption date of such Equipment Note, means 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 Equipment Note, 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 Equipment Note. 

           "Renewal Term" means any Fixed Renewal Term or Fair Market
 Renewal Term. 

           "Rent" means Basic Rent and Supplemental Rent, collectively.  

           "Replacement Airframe" means any airframe substituted for the
 Airframe pursuant to Section 10 of the Lease. 

           "Replacement Engine" means any engine substituted for an Engine
 pursuant to Sections 9(c) and 10 of the Lease. 

           "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. 

           "Scheduled Delivery Date" has the meaning specified for such term
 in Section 2(f) of the Participation Agreement. 

           "Section 1110 Period" has the meaning specified for such term in
 Section 4.04(a) of the Trust Indenture. 

           "Secured Obligations" has the meaning specified for such term in
 the Granting Clause of the Trust Indenture. 

           "Securities Act" means the Securities Act of 1933, as amended.  

           "Seller" means AVSA, S.A.R.L., a societE a responsabilite limitee
 organized and existing under the laws of the Republic of France. 

           "Senior Holder" has the meaning specified for such term in
 Section 2.15(c) of the Trust Indenture. 

           "Series A" or "Series A Equipment Notes" means Equipment Notes
 issued and designated as "Series A" under the Trust Indenture, 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 Equipment Notes" means Equipment Notes
 issued and designated as "Series B" under the Trust Indenture, 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 Equipment Notes" means Equipment Notes
 issued and designated as "Series C" under the Trust Indenture, in the
 Principal Amount and maturities and bearing interest as specified in
 Schedule I to the Trust Indenture under the heading "Series C." 

           "Significant Expenditure" means an expenditure or planned
 expenditure of the type described in clause (B) of the definition of
 Burdensome Termination Event. 

           "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. 

           "Sublease" means any sublease permitted by the terms of Section
 7(b)(x) of the Lease. 

           "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)
 of the Lease. 

           "Subordination Agent" means State Street Bank and Trust Company,
 a Massachusetts trust company, as subordination agent under the
 Intercreditor Agreement, or any successor thereto. 

           "Subsequent Owner Participant" means any entity to which the
 Owner Participant or any transferee from the 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 Owner Participant in the Trust Agreement, the Trust Estate and
 the Participation Agreement, to the extent permitted by Section 8.01 of the
 Trust Agreement and Section 7(k) of the Participation Agreement.  

           "Supplemental Rent" means, without duplication, (a) all amounts,
 liabilities, indemnities and obligations (other than Basic Rent) that
 Lessee assumes or  becomes obligated to or agrees to pay under any Lessee
 Document to or on behalf of Lessor or any other Person, including, without
 limitation, payments of Termination  Value, any amounts in respect of a
 purchase price payable pursuant to Section 19(c) of the Lease and payments
 of indemnities under Section 6 of the Participation Agreement, but
 excluding any amount as to which Lessee is obligated to pay a pro rata
 share pursuant to clause (d) or (e) of this definition, (b) (i) to the
 extent not 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), an amount or amounts equal to the fees
 payable to the Liquidity Provider under Section 2.03 of each Liquidity
 Facility and the related Fee Letter (as defined in the Intercreditor
 Agreement) multiplied by a  fraction the numerator of which shall be the
 then outstanding aggregate principal amount of the Series A Equipment
 Notes, Series B Equipment Notes and Series C  Equipment Notes and the
 denominator of which shall be the then outstanding aggregate  principal
 amount of all "Series A Equipment Notes", "Series B Equipment Notes" and
 "Series C Equipment Notes" (in each case as defined in the relevant
 Operative Indenture) issued under the Operative Indentures; (ii) (x) the
 amount equal to interest on any Downgrade Advance (other than any Applied 
 Downgrade Advance) payable under Section 3.07 of each Liquidity Facility
 minus  Investment Earnings from such Downgrade Advance multiplied by (y)
 the fraction specified in the foregoing clause (i); (iii) (x) the amount
 equal to interest on any Non-Extension Advance (other than any Applied Non-
 Extension Advance) payable under Section 3.07 of each Liquidity Facility
 minus Investment Earnings from such Non-Extension Advance multiplied by (y)
 the fraction specified in the forgoing clause (i); (iv) if any payment
 default shall have occurred and be continuing with respect to interest on
 any Series A Equipment Note, Series B Equipment Note or Series C Equipment
 Note, (x) the excess, if any, of (1) an amount equal to interest on any
 Unpaid Advance,  Applied Downgrade Advance or Applied Non-Extension Advance
 payable under  Section 3.07 of each Liquidity Facility over (2) the sum of
 Investment Earnings from any Final Advance plus any amount of interest at
 the Past Due Rate actually payable  (whether or not in fact paid) by Lessee
 in respect of the overdue scheduled interest on the Equipment Notes in
 respect of which such Unpaid Advance, Applied Downgrade Advance or Applied
 Non-Extension Advance was made multiplied by (y) a fraction the  numerator
 of which shall be the then aggregate overdue amounts of interest on the
 Series A Equipment Notes, Series B Equipment Notes and Series C Equipment
 Notes (other than interest becoming due and payable solely as a result of
 acceleration of any such Equipment Notes) and the denominator of which
 shall be the then aggregate overdue amounts of interest on all "Series A
 Equipment Notes", "Series B Equipment  Notes" and "Series C Equipment
 Notes" (in each case as defined in the relevant Operative Indenture) issued
 under the Operative Indenture (other than interest becoming due and payable
 solely as a result of acceleration of any such "Equipment Notes," in each
 case as defined in the relevant Operative Indenture) issued under the
 Operative Indentures); and (v) Lessee's pro rata share of 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 (i), (ii),  (iii) or (iv) above, (c) Lessee's
 pro rata share of all compensation and reimbursement of expenses,
 disbursements and  advances  payable by Lessee under the Pass Through Trust
 Agreements,  (d) Lessee'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 Subordination Agent in connection with
 the transactions contemplated by the Intercreditor Agreement  and (e)
 Lessee's pro rata share of any amount payable under  Section 6(c) of the
 Participation Agreement to any Pass Through Indemnitee to the extent such
 amount relates to, results from or arises out of or in connection with (i)
 the Pass Through Trust Agreement or the enforcement of any of the terms of
 any Pass Through Document, (ii) the offer, sale, or delivery of the Pass
 Through Certificates or any interest therein or represented thereby or
 (iii) any breach of or failure to perform or  observe, or any other
 noncompliance with, any covenant or agreement or other obligation to be
 performed by Lessee under any Pass Through Document or the falsity of any 
 representation or warranty of Lessee in any Pass Through Document.  As used
 herein, "Lessee's pro rata share" means as of any time a fraction, the
 numerator of which is the principal balance then outstanding of Equipment
 Notes and the denominator of which  is the aggregate principal balance then
 outstanding of all "Equipment Notes" (in each case as defined in the
 relevant Operative Indenture) issued under the Operative Indentures. For
 purposes of this definition, the terms "Applied Downgrade Advance",
 "Applied Non-Extension Advance", "Cash Collateral Account", "Downgrade
 Advance", "Final Advance", "Investment Earnings", "Non-Extension Advance"
 and "Unpaid Advance" shall have the meanings specified in each Liquidity
 Facility.  For the avoidance of doubt, it is understood and agreed that
 Supplemental Rent includes, without limitation, any amounts payable under
 the third  paragraph of Section 2.02 of the Trust Indenture. 

           "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 (US Airways, Inc. Trust No.  N7__UW), dated as of the date of the
 Lease, 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, recording charges and assessments of any
 kind whatsoever that are in the nature of taxes or other governmental
 charges including interest, penalties and additions to tax  (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) of
 the Lease. 

           "Termination Value" with respect to the Aircraft as of any date
 during the Term means, but subject always to the provisions of Section
 3(c)(v) of the Lease, the amount determined by multiplying Lessor's Cost
 for the Aircraft by the percentage specified in Exhibit D to the Lease
 opposite the 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(c) of the Lease and as expressly provided in any other
 Operative Document).  

        "Transaction Expenses" means:  all of the reasonable out-of-pocket
 costs, fees and expenses incurred by Lessee, the Owner Trustee, 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 Pass Through Documents, the Intercreditor Agreement, the
 Liquidity Facilities and the Underwriting Agreement (except, in each case,
 as otherwise provided therein) including, without limitation: 

             (a)  the reasonable and actual fees, expenses and
 disbursements of (A) Bingham, Dana & Gould 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, and (D) Crowe & Dunlevy, P.C., special
 counsel in Oklahoma City, Oklahoma and (E) Simpson Thacher & Bartlett,
 special counsel to AIFS;

             (b)  the initial fees and reasonable and actual disbursements
 of the Owner Trustee under the Trust Agreement; 

             (c)  the initial fee and reasonable and actual disbursements
 of the Indenture Trustee under the Trust Indenture;  

             (d)  the initial fees and expenses of the Liquidity Provider,
 the Pass Through Trustee and the Subordination Agent;  

             (e)  underwriting fees and commissions;

             (f)  the fees and expenses with respect to the appraisal of
 the Aircraft;

             (g)  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; 

             (h)  the fees, expenses and disbursements of Skadden, Arps,
 Slate, Meagher & Flom LLP and its affiliates, special counsel for Lessee;

             (i)  the costs of filing and recording documents with the FAA
 and filing Uniform Commercial Code statements in the United States;

             (j)  the reasonable fees, expenses and disbursements of
 special counsel to the Liquidity Provider; and

             (k)  the expenses of the Depositaries payable under Section
 10(a) of each Indemnity Agreement; and 

             (l)  the reasonable fees, expenses and disbursements of,
 special counsel to the Seller and the Manufacturer.

        "Transactions" means the transactions contemplated by the
 Participation Agreement and the other Operative Documents. 

        "Transferee" has the meaning specified for such term in Section
 7(k) of the Participation Agreement. 

        "Transportation Code" 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. 

        "Trust Agreement" means that certain Trust Agreement (US Airways,
 Inc.  Trust No.  N7__UW), dated as of the date of the Lease, 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, 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 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 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 Equipment Note, or to any of
 their respective directors, officers, employees, servants and agents,
 pursuant to Section 6 of the Participation Agreement). Notwithstanding the
 foregoing, "Trust Estate" shall not include any Excluded Payments. 

        "Trust Indenture" means that certain Trust Indenture and Security
 Agreement (US Airways, Inc. Trust No.  N7__UW), dated as of the date of the
 Lease, between Lessor and the Indenture Trustee, as it may from time to
 time be supplemented or amended as therein provided, including
 supplementing by the Trust Agreement and Indenture Supplement pursuant to
 the Trust Indenture. 

        "Trust Indenture Estate" means 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, excluding Excluded Payments.  

        "Underwriters" means Morgan Stanley & Co. Incorporated, Salomon Smith
 Barney Inc., Lehman Brothers Inc. and Credit Suisse First Boston Corporation. 

        "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 Transportation Code, 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 Transportation Code, 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 Lessee (or any Sublessee)) and (ii) shall be
 maintained by Lessee (or any Sublessee) in accordance with its normal
 maintenance practices. 





EXHIBIT 4(a)(xiv)
                                                            Form Lease  
                                                               N7___UW


                              LEASE AGREEMENT 

                    (US Airways, Inc. Trust No. N7__UW) 

                                Dated as of 

                             ________ __, 199_ 

                                  Between 

                FIRST SECURITY BANK, NATIONAL ASSOCIATION,  
            Not in its individual capacity except as expressly  
               provided herein, but solely as Owner Trustee,  

                                   Lessor 

                                    and 

                             US AIRWAYS, INC.,  

                                   Lessee 

                      One Airbus Model A319 Aircraft  



 As set forth in Section 21 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.



                    TABLE OF CONTENTS TO LEASE AGREEMENT 

 SECTION 1.    DEFINITIONS  . . . . . . . . . . . . . . . . . . . . . . .  1

 SECTION 2.    ACCEPTANCE AND LEASE . . . . . . . . . . . . . . . . . . .  1

 SECTION 3.    TERM AND RENT  . . . . . . . . . . . . . . . . . . . . . .  1
               (a)  Basic Term  . . . . . . . . . . . . . . . . . . . . .  1
               (b)  Basic Rent  . . . . . . . . . . . . . . . . . . . . .  1
               (c)  Adjustments to Basic Rent . . . . . . . . . . . . . .  2
               (d)  Supplemental Rent . . . . . . . . . . . . . . . . . .  3
               (e)  Payments in General . . . . . . . . . . . . . . . . .  4
               (f)  Business Day Convention . . . . . . . . . . . . . . .  5
 SECTION 4.    DISCLAIMER; LESSOR'S REPRESENTATIONS, WARRANTIES
               AND AGREEMENTS . . . . . . . . . . . . . . . . . . . . . .  5 
               (a)  Disclaimer  . . . . . . . . . . . . . . . . . . . . .  5
               (b)  Representations, Warranties and Covenants of 
                      First Security Bank . . . . . . . . . . . . . . . .  6
               (c)  Lessor's Covenants  . . . . . . . . . . . . . . . . .  6
               (d)  Manufacturer's Warranties . . . . . . . . . . . . . .  7
 SECTION 5.    RETURN OF THE AIRCRAFT.  . . . . . . . . . . . . . . . . .  7
               (a)  Condition Upon Return . . . . . . . . . . . . . . . .  7
               (b)  Storage and Related Matters . . . . . . . . . . . . .  7
               (c)  Return of Other Engines . . . . . . . . . . . . . . .  8
               (d)  Obligations Continue Until Return . . . . . . . . . .  8
 SECTION 6.    LIENS  . . . . . . . . . . . . . . . . . . . . . . . . . .  8
 SECTION 7.    REGISTRATION, MAINTENANCE, OPERATION AND REGISTRATION;
               POSSESSION AND SUBLEASES; INSIGNIA . . . . . . . . . . . .  9
               (a)  Registration, Maintenance, Operation and
                    Registration  . . . . . . . . . . . . . . . . . . . .  9
                    (1)  Registration and Maintenance . . . . . . . . . .  9
                    (2)  Operation  . . . . . . . . . . . . . . . . . . . 10
                    (3)  Reregistration . . . . . . . . . . . . . . . . . 11
               (b)  Possession and Subleases  . . . . . . . . . . . . . . 11
               (c)  Insignia  . . . . . . . . . . . . . . . . . . . . . . 16
 SECTION 8.    REPLACEMENT AND POOLING OF PARTS; ALTERATIONS,
               MODIFICATIONS
 AND ADDITIONS  . . . . . . . . . . . . . . . 17
               (a)  Replacement of Parts  . . . . . . . . . . . . . . . . 17
               (b)  Pooling of Parts  . . . . . . . . . . . . . . . . . . 18
               (c)  Alterations, Modifications and Additions. . . . . . . 19
               (d)  Certain Matters Regarding Passenger Convenience 
                      Equipment . . . . . . . . . . . . . . . . . . . . . 20
 SECTION 9.    VOLUNTARY TERMINATION  . . . . . . . . . . . . . . . . . . 20
               (a)  Termination Event . . . . . . . . . . . . . . . . . . 20
               (b)  Optional Sale of the Aircraft . . . . . . . . . . . . 21
               (c)  Termination as to Engines . . . . . . . . . . . . . . 23
               (d)  Special Purchase Options  . . . . . . . . . . . . . . 24
 SECTION 10.   LOSS, DESTRUCTION, REQUISITION, ETC.   . . . . . . . . . . 25
               (a)  Event of Loss with Respect to the Aircraft  . . . . . 25 
               (b)  Event of Loss with Respect to an Engine . . . . . . . 27
               (c)  Application of Payments from Governmental 
                      Authorities for Requisition of Title, etc.  . . . . 28
               (d)  Requisition for Use of the Aircraft by the
                      United States Government or the Government
                      of Registry of the Aircraft . . . . . . . . . . . . 29
               (e)  Requisition for Use of an Engine by the
                      United States Government or the Government
                      of Registry of the Aircraft . . . . . . . . . . . . 30
               (f)  Application of Payments During Existence of 
                      Event of Default  . . . . . . . . . . . . . . . . . 30
 SECTION 11.   INSURANCE  . . . . . . . . . . . . . . . . . . . . . . . . 31
               (a)  Lessee's Obligation to Insure . . . . . . . . . . . . 31
               (b)  Additional Insurance by Lessor and Lessee . . . . . . 31
               (c)  Indemnification by Government in Lieu of
                      Insurance . . . . . . . . . . . . . . . . . . . . . 31
               (d)  Application of Payments During Existence of
                      an Event of Default . . . . . . . . . . . . . . . . 31
 SECTION 12.   INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . 32
 SECTION 13.   ASSIGNMENT . . . . . . . . . . . . . . . . . . . . . . . . 33
 SECTION 14.   EVENTS OF DEFAULT  . . . . . . . . . . . . . . . . . . . . 34
 SECTION 15.   REMEDIES . . . . . . . . . . . . . . . . . . . . . . . . . 36
 SECTION 16.   LESSEE'S COOPERATION CONCERNING CERTAIN MATTERS;
               DELIVERY OF FINANCIAL STATEMENTS . . . . . . . . . . . . . 40
 SECTION 17.   NOTICES  . . . . . . . . . . . . . . . . . . . . . . . . . 41
 SECTION 18.   NO SET-OFF, COUNTERCLAIM, ETC. . . . . . . . . . . . . . . 42
 SECTION 19.   RENEWAL OPTIONS; PURCHASE OPTIONS; VALUATION . . . . . . . 43
               (a)  Renewal Options . . . . . . . . . . . . . . . . . . . 43
                    (1)  Fixed Renewal Term . . . . . . . . . . . . . . . 43
                    (2)  Fair Market Renewal Term . . . . . . . . . . . . 43
                    (3)  Waiver . . . . . . . . . . . . . . . . . . . . . 43
                    (4)  Conditions Precedent, Payment of Basic Rent  . . 44
                    (5)  Termination Value  . . . . . . . . . . . . . . . 44
               (b)  Purchase Options  . . . . . . . . . . . . . . . . . . 44
               (c)  Valuation . . . . . . . . . . . . . . . . . . . . . . 45
 SECTION 20.   BURDENSOME PURCHASE OPTION . . . . . . . . . . . . . . . . 47
 SECTION 21.   SECURITY FOR LESSOR'S OBLIGATION TO HOLDERS OF
               EQUIPMENT NOTES  . . . . . . . . . . . . . . . . . . . . . 48 
 SECTION 22.   LESSOR'S RIGHT TO PERFORM FOR LESSEE . . . . . . . . . . . 48
 SECTION 23.   INVESTMENT OF SECURITY FUNDS; LIABILITY OF LESSOR
               LIMITED  . . . . . . . . . . . . . . . . . . . . . . . . . 49
               (a)  Investment of Security Funds  . . . . . . . . . . . . 49
               (b)  Liability of Lessor Limited . . . . . . . . . . . . . 49
 SECTION 24.   JURISDICTION . . . . . . . . . . . . . . . . . . . . . . . 49
 SECTION 25.   MISCELLANEOUS  . . . . . . . . . . . . . . . . . . . . . . 50
 SECTION 26.   SUCCESSOR TRUSTEE  . . . . . . . . . . . . . . . . . . . . 50
 SECTION 27.   LEASE FOR U.S. FEDERAL INCOME TAX LAW PURPOSES;
               SECTION 1110 OF BANKRUPTCY CODE  . . . . . . . . . . . . . 51
               (a)  Lease for Federal Income Tax Law Purposes . . . . . . 51
               (b)  Section 1110 of Bankruptcy Code . . . . . . . . . . . 51


                                  EXHIBITS 

 EXHIBIT A - LEASE SUPPLEMENT NO.

 EXHIBIT B - PAST DUE RATE DEFINED; BASIC RENT AND LESSOR'S COST 

 EXHIBIT C - TERMINATION VALUE SCHEDULE 

 EXHIBIT D - EBO AMOUNT 

 EXHIBIT E -    RENT RECALCULATION AND INDEMNIFICATION VERIFICATION 

 EXHIBIT F - SCHEDULE OF DOMICILES OF PERMITTED SUBLESSEES 

 EXHIBIT G - RETURN CONDITIONS 

 EXHIBIT H - INSURANCE 





                              LEASE AGREEMENT 

                    (US Airways, Inc. Trust No. N7__UW) 

           This LEASE AGREEMENT (US Airways, Inc. Trust No. N7__UW), dated
 as of __________ __, 199_, 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 Annex A hereto) (in such capacity, "Lessor"), and US AIRWAYS, INC., a
 corporation organized and existing pursuant to the laws of the State of
 Delaware ("Lessee"); 

                            W I T N E S S E T H: 

           Section 1.     DEFINITIONS.  Capitalized terms used but not
 defined herein shall have the respective meanings set forth or incorporated
 by reference, and shall be construed and interpreted in the manner
 described, in Annex A.

           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 the Basic Term Expiration Date. 

           (b)  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 Delivery Date or
 applicable Lease Period Date, as the case may be, specified in Exhibit B
 hereto.

           (c)  Adjustments to Basic Rent. 

                (i)  In the event of a refinancing as contemplated by
      Section 16 of the Participation Agreement, then the Basic Rent
      percentages set forth in Exhibit B, the Termination Value percentages
      set forth in Exhibit C and the EBO Amount set forth on Exhibit D 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; 

                (ii) In the event that Lessee elects to satisfy any
      indemnity obligation under the Tax Indemnity Agreement pursuant to
      Section [__] of the Tax Indemnity Agreement, then the Basic Rent
      percentages set forth in Exhibit B, the Termination Value percentages
      set forth in Exhibit C and the EBO Amount set forth on Exhibit D 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 Termination Value
      percentages and the EBO Amount 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)     Whenever Basic Rent is recalculated pursuant to
      this Section 3(c), the Owner Participant shall redetermine the
      Termination Value Percentages set forth in Exhibit C and the EBO
      Amount set forth in Exhibit D in a manner consistent with such
      recalculation. 

                (iv) Any recalculation of Basic Rent and Termination Value
      percentages pursuant to this Section 3(c) 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 and
      Termination Value percentages 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(c), shall, together with all other amounts (including
      an amount equal to the premium, if any, payable by Lessor on the
      Equipment Notes) 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 any, and interest on the
      Equipment Notes.  It is agreed that no installment of Basic Rent,
      payment of Termination Value or EBO Amount 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 or other
      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 Equipment
      Notes made without the prior written consent of Lessee or (iii) the
      acceleration of any Equipment Note or Equipment Notes due to the
      occurrence of an Indenture Event of Default which does not constitute
      a Lease Event of Default. 

                (vi) All adjustments to Basic Rent under this Section 3(c)
      shall be (A) in compliance with the tests of Sections 4.02(5) and 4.07
      of Rev. Proc. 75-28 and with one or more of any "safe harbors" from
      characterization of this Lease as a "disqualified leaseback or long-
      term agreement" set forth in Section 467 of the Code (or any proposed,
      temporary or final regulations thereunder applicable to this Lease)
      or, if no "safe harbor" exists, made in a manner to avoid
      characterization of this Lease as a "disqualified leaseback or long-
      term agreement" within the meaning of Section 467 of the Code and (B)
      subject to verification pursuant to Exhibit E. 

           (d)  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 Termination Value and Make-Whole Amount as
 the same shall become due and owing and all other amounts of Supplemental
 Rent within five Business Days (5) 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
 Equipment Notes upon redemption of such Equipment Notes 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. 

           (e)  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 11:00 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 US Airways/US Airways, Inc. Trust No. N7__UW (or such
 other account of Lessor in the continental United States as Lessor shall
 direct in a notice to Lessee at least ten (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 11:00 a.m.,
 New York time on the due date thereof in funds of the type specified in
 this Section 3(e) directly to the Indenture Trustee at its account at State
 Street Bank and Trust Company, 225 Franklin Street, 4th Floor, Boston,
 Massachusetts 02110, ABA No. 011-00-0028, Account No. 9903-990-1,
 Attention:  Corporate Trust Department, Reference:  US Airways, Inc. 1998-1
 EETC/US Airways, Inc. Trust No. N7__UW (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 ten (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 Person (other than the
 Excluded Payments payable to the Owner Participant) pursuant to the
 Participation Agreement shall be made in Dollars in immediately available
 funds prior to 11:00 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 ten (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,
 shall be made in Dollars in immediately available funds prior to 11:00
 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).

           (f)  Business Day Convention.  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.     DISCLAIMER; LESSOR'S REPRESENTATIONS, WARRANTIES
 AND AGREEMENTS.

           (a)  Disclaimer.   LESSOR LEASES AND LESSEE TAKES THE AIRCRAFT
 AND EACH PART THEREOF "AS-IS," "WHERE-IS." EXCEPT AS EXPRESSLY  PROVIDED
 HEREIN, 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.  

           (b)  Representations, Warranties and Covenants of First Security
 Bank. 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 attributable to it, (iii) covenants that
 neither it nor any Person claiming by, through or under it will, through
 its own actions or inactions, interfere in Lessee's or any Sublessee's
 continued possession, use, operation and quiet enjoyment of the Aircraft
 during the Term unless an Event of Default has occurred and is continuing
 and this Lease has been duly declared in default, and this Lease shall not
 be terminated except as expressly provided herein, (iv) covenants 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 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 Transportation Code 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.

           (c)  Lessor's Covenants.  Lessor (i) covenants that neither it
 nor any Person claiming by, through or under it will, through its own
 actions or inactions, interfere in Lessee's or any Sublessee's continued
 possession, use, operation and quiet enjoyment of the Aircraft during the
 Term unless an Event of Default has occurred and is continuing and this
 Lease has been duly declared in default, and this Lease shall not be
 terminated except as expressly provided herein and (ii) covenants 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. 

           (d)  Manufacturer's Warranties.  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 Seller, the Manufacturer, any subcontractor or supplier of the
 Manufacturer with respect to the Airframe, the Engines or any Parts, or to
 release the Seller, the Manufacturer, or any such subcontractor or
 supplier, from any such representation, warranty or obligation.  Unless an
 Event of Default shall have occurred and be continuing under Section 14 and
 this Lease shall have been declared in default, Lessor agrees to make
 available to Lessee such rights as Lessor may have under any warranty with
 respect to the Aircraft made by the Seller, the Manufacturer or any
 affiliate thereof or any of its subcontractors or suppliers and any other
 claims against the Seller, the Manufacturer or any affiliate thereof, or
 any such subcontractor or supplier with respect to the Aircraft, all
 pursuant to and in accordance with the terms of the Purchase Agreement
 Assignment.

           Section 5.     RETURN OF THE AIRCRAFT.

           (a)  Condition Upon Return.  Lessee shall comply with each of the
 provisions of Exhibit G, which provisions are hereby incorporated by this
 reference as if set forth in full herein.

           (b)  Storage and Related Matters.  Unless Lessee has elected to
 purchase the Aircraft in accordance with the terms hereof, if Lessor gives
 written notice to Lessee not less than sixty (60) days nor more than one
 hundred eighty (180) days prior to the end of the Term requesting storage
 of the Aircraft upon its return hereunder, Lessee will provide Lessor, or
 cause Lessor to be provided, with outdoor parking facilities for the
 Aircraft for a period up to thirty (30) days, commencing on the date of
 such return, at such storage facility in the forty eight (48) contiguous
 states of the United States as Lessee may select; provided that such
 location shall be a location generally used for the storage or parking of
 commercial aircraft by aircraft owners or operators.  Notwithstanding
 subsection (a) of Exhibit G, such location shall be deemed to be the return
 location of the Aircraft for purposes of such Exhibit G.  Such storage
 shall be at Lessor's risk and expense and Lessor shall pay all applicable
 storage, maintenance and insurance fees and expenses.  Lessee's obligation
 to arrange parking shall be subject to Lessee and Lessor entering into an
 agreement prior to the commencement of the storage period with the storage
 facility providing, among other things, that Lessor shall bear all
 maintenance charges and other costs incurred relating to such storage.

           (c)  Return of Other Engines.  In the event that any Engine owned
 by Lessor shall not be installed on the Airframe at the time of return
 hereunder, Lessee shall be required to return the Airframe hereunder with
 an Acceptable Alternate Engine meeting the requirements of, and in
 accordance with, Section 10 and Exhibit G hereto.  Thereupon, Lessor will
 transfer to Lessee the Engine constituting part of such Aircraft but not
 installed on such Airframe at the time of the return of the Airframe.

           (d)  Obligations Continue Until Return.  If Lessee shall, for any
 reason, fail to return the Aircraft at the time specified herein, all
 obligations of Lessee under this Lease shall continue in effect with
 respect to the Aircraft until the Aircraft is returned to Lessor and Lessee
 shall pay to Lessor an amount equal to the average daily Basic Rent payable
 by Lessee during the Term for each day after the end of the Term to but
 excluding the day of such return; provided, however, that Lessee shall not
 be responsible for Lessor's failure to accept return of the Aircraft in
 accordance with this Section 5 in a timely manner or for any Rent with
 respect to periods after Lessee has tendered the Aircraft for return in
 accordance with this Lease.  Any Rent owed to Lessor pursuant to this
 Section 5(d) shall be payable upon acceptance of the Aircraft by Lessor or
 on the last day of each calendar month following the last day of the Term
 if the Aircraft has not been accepted earlier.

           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 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, the rights of any
 Sublessee under a sublease permitted hereunder and any other rights of any
 Person 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, 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 danger of the sale, forfeiture or loss of the Airframe or any
 Engine or any interest therein, (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, (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, OPERATION AND
 REGISTRATION; POSSESSION AND SUBLEASES; INSIGNIA.

           (a)  Registration, Maintenance, Operation and Registration.

                (1)  Registration and Maintenance.  Lessee, at its own
      cost and expense, shall (or shall cause any Sublessee to): (A)
      forthwith upon the delivery thereof hereunder, cause the Aircraft
      to be duly registered in the name of Lessor, and, subject to
      clause 3 of this Section 7(a) and Section 7(d) of the
      Participation Agreement, to remain duly registered in the name of
      Lessor under the Transportation Code, 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 Transportation Code at any time except as provided
      in Section 7(d) of the Participation Agreement and, unless the
      Lien of the Trust Indenture shall have been discharged, shall
      cause the Trust Indenture to be duly recorded and maintained of
      record as a first mortgage on the Aircraft; (B) maintain,
      service, repair and/or overhaul (or cause to be maintained,
      serviced, repaired and/or overhauled) the Aircraft so as to keep
      the Aircraft in as good an operating condition as when delivered
      by the Seller to Lessee, 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 or
      during maintenance or modification permitted hereunder) under the
      Transportation Code, except when all Airbus Model A319 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 7(d) of the Participation Agreement,
      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; (C) maintain or cause to be maintained in
      English 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 (D) 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. 

                (2)  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 over the Aircraft, 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 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 if
      indemnification complying with Section 11(c) has been provided or
      where such failure is attributable 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) such as a hijacking, medical emergency, equipment
      malfunction, weather condition, navigational error or other
      causes beyond the reasonable control of Lessee (or any
      Sublessee).

                (3)  Reregistration.  At any time after the
      Depreciation Period, Lessor, upon Lessee's compliance with all of
      the terms of Section 7(d) 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, and so long as Lessee (or any
 Sublessee) shall comply with the provisions of Section 7(a) and Section 11
 hereof, Lessee may (or may permit any Sublessee to), without the prior
 written consent of Lessor:  

                          (i)  subject the Airframe and the Engines or
      engines then installed thereon to interchange agreements or any
      Engine to 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
      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 or pooling or similar arrangements which
      would be permitted under clause (i) above, provided that Lessor's
      title to such Engine and, if any Equipment Notes 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)) the documents creating such mortgage liens or other
      security interests (or, if applicable, another written agreement
      governing 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 clause (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 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 clause (iii) nor clause (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
      Government 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 Government 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 in its sole
      discretion, enter into any sublease with (A) any Person domiciled
      in the United States, (B) after the Depreciation Period, any
      Permitted Sublessee or (C) after the Depreciation Period, any
      other Person approved in writing by Lessor, which approval shall
      not be unreasonably withheld; 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 or renew the Lease in accordance with the terms hereof
      at the end of the Basic Term or Renewal Term, as the case may be,
      to a date beyond the latest permissible expiration date of such
      sublease; provided, further, with respect to a sublease under
      subclauses (B) or (C) of this clause (x), Lessee shall deliver to
      Lessor an opinion of counsel to the effect that (I) the
      obligations of Lessee and the rights and remedies of the Lessor
      under the Lease remain valid, binding and (subject to customary
      bankruptcy and equitable remedies exceptions and to other
      exceptions customary in such Opinions) enforceable; (II) the
      terms of the sublease constitute valid and binding obligations of
      the Sublessee and (subject to customary bankruptcy and equitable
      remedies exceptions and to other exceptions customary in such
      Opinions) enforceable against Sublessee (it being understood that
      such opinion may be an opinion as to the form of the Sublease
      only and may assume due authorization, execution, delivery,
      requisite approvals and absence of conflicts with laws, contracts
      or organizational documents) under the laws of the jurisdiction
      governing the sublease, (III) that there is no tort liability of
      the owner of an aircraft not in possession thereof under the laws
      of the jurisdiction of the proposed sublessee other than tort
      liability which might have been imposed on such owner under the
      laws of the United States or any state thereof (it being
      understood that in the event such opinion cannot be given such
      opinion requirement shall be waived if insurance reasonably
      satisfactory to Lessor, in its individual capacity, is provided
      at Lessee's expense), and (IV) unless Lessee shall have agreed to
      provide insurance covering the risk of requisition of use of the
      Aircraft by the government of the jurisdiction of the proposed
      sublessee reasonably satisfactory to the Owner Participant, that
      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 the Aircraft in
      the event of the requisition by such government of such use. 
      Lessee shall provide Lessor with a copy of any sublease which has
      a term of more than one (1) year.

           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
 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 Lessor's (and so long as the Trust Indenture is in effect, the
 Indenture Trustee's (as Lessor's assignee) rights to repossess and to void
 such Sublease upon such repossession, and Lessee shall remain primarily
 liable hereunder for the performance of all of the terms of this Lease, and
 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.  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
 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. 

           Any Wet Lease or similar arrangement under which Lessee maintains
 operational control of the Aircraft shall not constitute a delivery,
 transfer or relinquishment of possession of the Aircraft for purposes of
 this section.  Lessor acknowledges that any consolidation or merger of
 Lessee or conveyance, transfer or lease of all or substantially all of
 Lessee's assets otherwise permitted by the Operative Documents shall not be
 prohibited by this Section. 

           (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. 

           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 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 applicable regulatory agency or body of any other jurisdiction in which
 the Aircraft may then be registered as permitted by Section 7(d) of the
 Participation Agreement; 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 Equipment
 Notes 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 (it being agreed that the
 modification that makes an Engine a CFM 56-5B-5/P engine shall be deemed
 not to diminish the value, utility and remaining useful life of an Engine),
 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 $350,000 in aggregate value at
 the time of removal.  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 (except those parts which (x) Lessee
 has leased from others and (y) may be removed by Lessee pursuant to the
 next sentence (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.  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.  

           (d)  Certain Matters Regarding Passenger Convenience Equipment. 
 Lessee may install on the Airframe, subject to the requirements of Section
 8(c) above, Passenger Convenience Equipment that is (i) owned by another
 Person and leased to Lessee, (ii) sold to Lessee by another Person subject
 to a conditional sale contract or other retained security interest,
 (iii) leased to Lessee pursuant to a lease which is subject to a security
 interest in favor of another Person or (iv) installed on the Aircraft
 subject to a license granted to Lessee by another Person, and in any such
 case (A) the Lessor and the Indenture Trustee will not acquire or claim, as
 against any such other Person, any right, title or interest in any such
 Passenger Convenience Equipment solely as a result of its installation on
 the Airframe, (B) Lessee shall notify such Person of Lessor's and Indenture
 Trustee's respective interest in the Aircraft, and (C) upon the occurrence
 of any default under the applicable lease, conditional sale agreement,
 security agreement or license, such Person shall not be entitled to
 repossess such Passenger Convenience Equipment unless it shall, in
 connection with such repossession, undertake to restore the Aircraft to the
 condition it would have been in had the installation of such Passenger
 Convenience Equipment not occurred.

           Section 9.     VOLUNTARY TERMINATION.

           (a)  Termination Event.  

           (i)    Lessee shall have the right to elect to terminate this
      Lease (x) on any Lease Period Date occurring on or after the close of
      the calendar year in which the seventh (7th) anniversary of the
      Delivery Date occurs if Lessee shall have made the good faith
      determination, which shall be evidenced by a certificate of a
      responsible officer of Lessee, that the Aircraft is obsolete or
      surplus to its needs or (y) on the tenth, thirteenth and sixteenth
      anniversaries of the Delivery Date.   

           (ii) Lessee shall give to Lessor at least one hundred twenty
      (120) days revocable advance written notice of Lessee's intention to
      so terminate this Lease (any such notice, a "Termination Notice")
      specifying (A) the Lease Period Date on which Lessee intends to
      terminate this Lease in accordance with this Section 9 (such specified
      date, a "Termination Date"), (B) either (x) that Lessee has determined
      that the Aircraft is obsolete or surplus to its needs or (y) that it
      is exercising its termination option pursuant to Section 9(a)(i)(y)
      and (C) in the case of a Termination under Section 9(a)(i)(y) whether
      Lessee elects to purchase the Aircraft pursuant to Section 9(d).  Any
      Termination Notice shall become irrevocable fifteen (15) days prior to
      the Termination Date. 

           (b)  Optional Sale of the Aircraft; Lessor Retention Option;
 Revocation of Termination Notice.  In the event that Lessee shall have
 exercised its right to terminate this Lease under Section 9(a)(i)(y) but
 shall not have elected to purchase the Aircraft pursuant to Section 9(d),
 or Lessee shall have elected to terminate this Lease pursuant to Section
 9(a)(i)(x), then during the period from the giving of the notice referred
 to in Section 9(a) until the proposed Termination Date (unless Lessee shall
 have revoked the Termination Notice specifying such proposed Termination
 Date or Lessor shall have irrevocably elected to retain the Aircraft
 pursuant to this Section 9(b)), Lessee, as agent for Lessor and at no
 expense to Lessor, shall use commercially reasonable efforts to obtain bids
 for the purchase of the Aircraft and, in the event it receives any bid,
 Lessee shall, within five (5) Business Days after receipt thereof and at
 least ten (10) 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.  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 bid therefor at least ten 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),
 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(e) hereof, an amount equal to the sum of (A) the
 excess, if any, of (i) the Termination Value for the Aircraft, computed as
 of the Termination Date, over (ii) the sales price of the Aircraft sold by
 Lessor 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 Equipment Notes, and upon such payment Lessor
 simultaneously will transfer to Lessee, without recourse or warranty
 (except as to the absence 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 irrevocable written notice of such election within thirty (30) days
 of its receipt of a Termination Notice accompanied by an irrevocable
 undertaking by the Owner Participant to make available to the Lessor for
 payment to the Indenture Trustee on the Termination Date the amount
 required to pay in full the unpaid principal amount of the Equipment Notes
 outstanding on the Termination Date plus interest accrued thereon through
 the Termination Date together with the Make-Whole Amount, if any, due on
 the Equipment Notes, if the same is not otherwise paid.  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 Equipment Notes outstanding on the
 Termination Date plus interest accrued thereon through the Termination Date
 together with all Make-Whole Amount, if any, due on the Equipment Notes 
 and, so long as the Equipment Notes 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, in which case Lessor and
 the Owner Participant shall be responsible for damages), if any, in
 connection with preparation for such sale and Lessee may give one or more
 additional Termination Notices in accordance with Section 9(a), subject to
 the last sentence of this Section 9(b).  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
 interest in the Aircraft, against receipt of the payments provided herein. 
 Lessee may revoke a Termination Notice given pursuant to Section 9(a) no
 more than two times during the Term. 

           (c)  Termination as to Engines; Replacement.  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(c) shall result in any reduction of Basic Rent.  

           (d)  Special Purchase Options.  If Lessee exercises its right to
 terminate this Lease under Section 9(a)(1)(y), gives its notice pursuant to
 Section 9(a)(ii) to purchase the Aircraft pursuant to this Section 9(d) and
 such notice becomes irrevocable, then on the Termination Date specified in
 Section 9(a), Lessee shall purchase the Aircraft at the greater of (i) the
 Termination Value on the Termination Date, or (ii) its fair market sale
 value on the Termination Date (determined in accordance with Section 19(c)
 hereof), provided the Lessee shall have also paid the amounts specified in
 (A) and (B) of the following sentence.  In such event, Lessor shall,
 without recourse or warranty (except as to the absence of Lessor Liens),
 sell the Aircraft to Lessee in exchange for the payment in immediately
 available funds in an amount equal to the greater of (x) the Termination
 Value for the Aircraft, computed as of the Termination Value Date, or (y)
 the fair market sales value of the Aircraft on the Termination Date, 
 provided that on such date the Lessee shall have also paid to the Lessor
 the sum of (A) all unpaid Basic Rent with respect to the Aircraft due on or
 prior to such Termination Date (other than Basic Rent payable in advance
 and due on the Termination Date) and all unpaid Supplemental Rent with
 respect to the Aircraft due on or prior to such Termination Date plus (B)
 all  reasonable expenses incurred by Lessor and the Owner Participant in
 connection with such sale.  Upon payment in full of the amounts required to
 be paid and the performance of all acts required to be performed by Lessee
 pursuant to the preceding sentence, (i) the obligation of Lessee to pay
 Basic Rent hereunder with respect to the Aircraft for any period commencing
 on or after the Termination Date shall terminate with respect to the
 Aircraft, (ii) this Lease shall terminate on the Termination Date, (iii)
 Lessor will transfer to or at the direction of Lessee, without recourse or
 warranty (except as to the absence of Lessor Liens), all of Lessor's right,
 title and interest in the Airframe and Engines and furnish to or at the
 direction of the Lessee a bill of sales in form and substance reasonably
 satisfactory to Lessee, evidencing such transfer.  Notwithstanding the
 foregoing, Lessee may, in accordance with Section 7(u) of the Participation
 Agreement, assume the principal amount of the Equipment Notes then
 outstanding on any Termination Date specified in Section 9(a), in which
 event the Lessee will receive a credit against the purchase price otherwise
 payable pursuant to this Section 9(d) in an amount equal to the principal
 amount of Equipment Notes so assumed.  

           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
 sixty (60) 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(e) hereof, an amount equal to
      the Termination Value of the Aircraft corresponding to the
      Termination Value Date occurring on or immediately following the
      Loss Payment Date;

                          (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 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 clause (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 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), 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 at least equal to the
 Aircraft subject to such Event of Loss assuming that the Aircraft had been
 maintained in accordance with this Lease 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 Transportation Code, or the applicable laws,
 rules and regulations of any other jurisdiction in which the Airframe may
 then be registered as permitted by Section 7(d) 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, 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), all of Lessor's right, title and interest, if any, in and
 to the 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 Skadden, Arps,
 Slate, Meagher & Flom LLP or Skadden, Arps, Slate, Meagher & Flom
 (Illinois) 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 Equipment Notes 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 one hundred twenty (120) 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 an
 Acceptable Alternate Engine.  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 Acceptable Alternate Engine,
 (ii) cause a Lease Supplement and Trust Supplement to be duly executed by
 Lessee and to be filed for recording pursuant to the Transportation Code,
 or the applicable laws, rules and regulations of any other jurisdiction in
 which the Airframe may then be registered as permitted by Section 7(d) 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, 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) 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 Termination Value required to be paid by
      Lessee pursuant to Section 10(a), shall be applied in reduction
      of Lessee's obligation to pay Termination Value, if not already
      paid by Lessee, or, if already paid by Lessee, shall be applied
      to reimburse Lessee for its payment of Termination 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 Termination 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; 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.

           (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 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 (except to the extent that any failure or
 delay in repairing or maintaining the Aircraft shall have been caused by
 such requisition), provided that if such Airframe and Engines or engines
 installed thereon are not returned by such government 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.  If, in the event of any such requisition, Lessee shall
 fail to return the Aircraft on or before the thirtieth (30th) 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 (20th) 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 (30th) day beyond the end of the Term, Lessee
 shall be relieved of all of its obligations pursuant to the provisions of
 Section 5  (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 (which may be Lessee's General Counsel, Deputy General
 Counsel, Assistant General Counsel or Associate General 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, Loan
 Participant Liens and Indenture Trustee 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), 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 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 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 paragraph (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 Lessor or Lessee from such government 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 has occurred and is 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 an Event of Default has occurred and is
 continuing hereunder, 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)  Lessee's Obligation to Insure.  Lessee shall comply with, or
 cause to be complied with, each of the provisions of Exhibit H, which
 provisions are hereby incorporated by this reference as if set forth in
 full herein.

           (b)  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 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.

           (c)  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
 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) shall be at least equal to the amount of
 insurance against such risk otherwise required by this Section 11 (taking
 into account self-insurance permitted by Exhibit H hereto).

           (d)  Application of Payments During Existence of an Event of
 Default. Any amount referred to in paragraph (b) of Exhibit H hereto 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 has occurred and is continuing, but shall
 be held by or paid over to Lessor as security for the obligations of Lessee
 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 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, the Owner Participant or the
 Indenture Trustee, or their respective authorized representatives, may
 inspect the Aircraft and inspect and make copies of the books and records
 of Lessee and any Sublessee required to be maintained by the Federal
 Aviation Administration or the regulatory agency or body of another
 jurisdiction in which the Aircraft is then registered relating to the
 maintenance of the Aircraft (at Lessor's, the Owner Participant's or the
 Indenture Trustee's risk and expense, as the case may be) and shall keep
 any information or copies obtained thereby confidential and shall not
 disclose the same to any Person, except (A) to the Lessor, the Certificate
 Holders and to prospective and permitted transferees of Lessor's, the Owner
 Participant's, the Certificate Holders' or the Indenture Trustee's interest
 (and such prospective and permitted transferee's counsel, independent
 insurance advisors or other agents) who agree to hold such information
 confidential, (B) to Lessor's, the Owner Participant's, the Certificate
 Holders' or the Indenture Trustee's counsel, independent insurance advisors
 or other agents 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, provided, however, that any and all
 disclosures permitted by clause (C) above shall be made only to the extent
 necessary to meet the specific requirements or needs of the Persons for
 whom such disclosures are hereby permitted.  Any such inspection of the
 Aircraft shall be subject to Lessee's safety and security rules applicable
 to the location of the Aircraft, shall be a visual, walk-around inspection
 of the interior and exterior of the Aircraft and shall not include opening
 any panels, bays or the like without the express consent of Lessee (except
 in connection with a heavy maintenance visit when a panel, bay or the like
 is scheduled or required to be opened), which consent Lessee may in its
 sole discretion withhold; provided that no exercise of such inspection
 right shall interfere with the normal 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 heavy maintenance visit to be performed on the Aircraft
 during the Term, Lessee shall cooperate with the Owner Participant to
 enable the Owner Participant's representative to observe such scheduled
 maintenance to be performed on the Aircraft during the Term; provided that
 the Owner Participant's authorized representative shall merely observe such
 scheduled heavy maintenance visit, shall not interfere with or extend in
 any manner the normal conduct or duration of the scheduled heavy
 maintenance visit, and shall not be entitled to direct any of the work
 performed in connection with such scheduled heavy maintenance visit. 
 Neither the Owner Participant nor the Indenture Trustee shall have any duty
 to make any such inspection nor shall either of them incur any liability or
 obligation by reason of not making such inspection.  Except during the
 final six (6) months of the Term or during the continuance of an Event of
 Default, all inspections by the Owner Participant and its authorized
 representatives or the Indenture Trustee and its authorized representatives
 provided for under this Section 12 shall, in regard to each of the Owner
 Participant and the Indenture Trustee, be limited to one (1) inspection of
 any kind contemplated by this Section 12 during any calendar year.  During
 the last three 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, at Lessor's sole cost, 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
 the Aircraft, any maintenance records relating to the Aircraft then
 required to be retained by the FAA or by the comparable government of
 registry of the Aircraft, all in accordance with the provisions set forth
 above; provided that any such cooperation shall not interfere with the
 normal operation or maintenance of the Aircraft by, or the business of,
 Lessee or any Sublessee.

           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 Indenture,
 the Trust Agreement, in the Participation Agreement or in any other
 Operative Document.  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 (i) Basic Rent
 within five (5) Business Days after the same shall have become due or (ii)
 Termination Value within ten (10) Business Days after receipt by Lessee of
 written notice that the same is past due; or 

           (b)  Lessee shall have failed to make a payment of Supplemental
 Rent (other than Termination Value) after the same shall have become due
 and such failure shall continue for thirty (30) 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 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

           (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)
 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 and, notwithstanding the diligence of Lessee in attempting
 to cure such failure, such failure is not cured within said thirty (30) 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 (360) 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 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 or the
 Underwriting Agreement or any document or instrument furnished pursuant to
 either thereof) shall prove to have been incorrect in any material respect
 at the time made, shall remain material at the time in question 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

           (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 Section 14(c) or (d) hereof, 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; 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 (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 (10) 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 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
 (including, without limitation, any adjustments to Basic Rent payable
 pursuant to Section 3(c)) 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 Termination 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 Past Due Rate; or (ii)
 an amount equal to the excess, if any, of the Termination 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, without limitation, any
 adjustments to Basic Rent payable pursuant to Section 3(c)) plus the amount
 of any deficiency between the net proceeds of such sale (after deduction of
 all reasonable costs of sale) and the Termination Value of such Aircraft,
 computed as of the Termination Date on or immediately following the date of
 such sale together with interest, if any, on the amount 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 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 lease, 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 (10) Business 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 (10) Business 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 (2) recognized independent aircraft
 appraisers, one of which appraisers shall be chosen by Lessor and one by
 Lessee within five (5) 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 (20) Business Days after the end of such
 five (5) Business Day period, each shall render its own appraisal and shall
 by mutual consent choose another appraiser within five (5) Business Days
 after the end of such twenty (20) day period.  If, within such five (5) 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 (20)
 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 (2) 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.  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;
 DELIVERY OF FINANCIAL STATEMENTS.  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 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 (which may be Lessee's General Counsel or
 other senior attorney) reasonably satisfactory to Lessor and the Indenture
 Trustee as to the due recording or filing of such supplement or amendment. 
 Lessee will deliver to Lessor, the Owner Participant and the Indenture
 Trustee (a) within sixty (60) days after the end of each of the first three
 quarterly periods of each fiscal year of Lessee, the publicly filed Form
 10-Q report of Lessee; and (b) within one hundred twenty (120) days after
 the close of such fiscal year, the publicly filed annual report and Form
 10-K report of Lessee.

           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:

           (a)  if to Lessee, for U.S. mail at 2345 Crystal Drive,
 Arlington, Virginia 22227, and for overnight courier at 2345 Crystal Drive,
 Arlington, Virginia 22227,  Attention:  Assistant Treasurer  (Telecopy No.
 (703) 872-5936), or to such other address or telecopy number as Lessee
 shall from time to time designate in writing to Lessor,

           (b)  if to Lessor, at 79 South Main Street, 3rd Floor, 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 

           (c)  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.  

           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(e). 
 Except as expressly provided herein, 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;
 provided, however, that notwithstanding the foregoing, Lessee shall be
 entitled to offset from any payment due to  the Owner Participant the cost
 incurred by Lessee to discharge Lessor Liens relating to the Owner
 Participant.  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.  Not more than 365 days and
      not less than one hundred twenty (120) days, before the end of
      the Basic Term, Lessee may deliver to Lessor a written notice
      irrevocably electing to renew this Lease for a term having a
      duration and at a Basic Rent as determined below (any such
      renewal term, a "Fixed Renewal Term").  The duration of the Fixed
      Renewal Term shall be a period specified by Lessee before the end
      of the Basic Term which is (i) not less than one year (provided
      any such period shall be in six (6) month increments), (ii) not
      more than the longest period of time which would cause the Term,
      after giving effect to such Fixed Renewal Term, to be equal to
      75% of the total useful life of the aircraft as determined by the
      Delivery Date appraisal.  Each semi-annual installment of Basic
      Rent during the Fixed Renewal Term shall be equal to (x) the
      lesser of (A) the fair market rental value of the Aircraft or (B)
      one-half of the average annual Basic Rent during the Basic Term
      or (y) divided by two.

                (2)  Fair Market Renewal Term.  Lessee shall have the
      right to renew this Lease for additional periods of one (1) year
      or more (provided any such period shall be on six (6) month
      increments) commencing at the end of the Basic Term or the Fixed
      Renewal Term 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 option to renew shall be
      exercised by Lessee providing irrevocable notice at least one
      hundred twenty (120) days prior to the commencement of such Fair
      Market Renewal Term.

                (3)  Waiver.  If no written notice is delivered by
      Lessee to Lessor pursuant to Section 19(a)(1) or (a)(2) on or
      before the day specified therefor, Lessee shall be deemed to have
      waived any right to renew this Lease.

                (4)  Conditions Precedent, Payment of Basic Rent.  At
      the end of the Basic Term or any Renewal Term, if Lessee has
      elected to renew this Lease as aforesaid, (i) this Lease shall
      continue in full force and effect during the Renewal Term, and
      (ii) Basic Rent for such Renewal Term 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, provided that
      Basic Rent for such Renewal Term shall be payable at such other
      frequency of payment consistent with the length of the Renewal
      Term as Lessor may reasonably designate in the event that such
      period is not divisible into whole semi-annual periods.

                (5)  Termination Value.  The amounts which are payable
      during any Renewal Term in respect of Termination Value with
      respect to the Aircraft shall be determined on the basis of the
      fair market sales value of the Aircraft as of the commencement of
      such Renewal Term, amortized on a straight-line basis over such
      Renewal Term to the projected fair market sales value of the
      Aircraft as of the expiration of such Renewal Term, as such fair
      market sales value in each case is determined prior to the
      commencement of such Renewal Term.  In determining fair market
      sales value for purposes of calculating Termination Value for any
      Renewal Term effect shall be given to the encumbrance on the
      Aircraft of any Fixed Renewal Term available or in force.

           (b)  Purchase Options.  Lessee shall have the option, (i) upon at
 least thirty (30) days irrevocable prior written notice to Lessor prior to
 the EBO Date with respect to the purchase option set forth in clause (i)
 and (ii) upon at least one hundred twenty (120) days irrevocable prior
 written notice to Lessor prior to the relevant purchase date (each a
 "Purchase Option Date") with respect to the purchase option set forth in
 clause (ii), to terminate this Lease and to purchase the Aircraft:

                (1)  on the EBO Date, for a purchase price equal to the
      EBO Amount set forth on Exhibit D, it being understood that if
      such amount is to be paid in installments, Lessee will, upon
      payment of the first installment of the EBO Amount, on the EBO
      date, receive title to the Aircraft free and clear of all liens;

                (2)  on the last Business Day of the Basic Term for a
      purchase price equal to the fair market sales value of the
      Aircraft on such date, provided, however, that in no event shall
      such purchase price exceed 50% of Lessor's Cost;

                (3)  on the last Business Day of any Renewal Term for a
      purchase price equal to the fair market sales value of the
      Aircraft on such date.

           Notwithstanding the foregoing, the purchase price on any Purchase
 Option Date shall be sufficient, together with all other amounts payable
 simultaneously by Lessee, to pay in full the payments then required to be
 made on account of the principal amount of and accrued and unpaid interest
 on the Equipment Notes then outstanding.  Upon payment to Lessor in
 immediately available funds in Dollars of the full amount of the purchase
 price and payment of any other amounts then due hereunder (including all
 Rent and all reasonable 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 absences of Lessor Liens), all of
 Lessor's right, title and interest in and to the Aircraft.  Notwithstanding
 the foregoing, Lessee may, in accordance with Section 7(u) of the
 Participation Agreement, assume the principal amount of the Equipment Notes
 then outstanding on any applicable Purchase Option Date in which event
 Lessee shall receive a credit against the purchase price otherwise payable
 pursuant to the preceding two sentences in an amount equal to the principal
 amount so assumed. 

           (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)(2) or (b)(3) hereof or renew this Lease
 pursuant to Section 19(a)(1) or (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 Lessor 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 Fair Market 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 Termination Value during the
 applicable Fair Market 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 within 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 (5)
 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  (20) Business Days after the end of such five (5) Business Day
 period, each shall render its own appraisal and shall by mutual consent
 choose another appraiser within five (5) Business Days after the end of
 such twenty (20) Business Day period.  If, within such five (5) Business
 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 ten (10)
 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 Lease or purchase the Aircraft following such appraisal, Lessee shall
 pay all expenses of such appraisal.

           Section 20.    BURDENSOME PURCHASE OPTION.  If a Burdensome
 Termination Event shall have occurred, then on any Lease Period Date
 occurring after the expiration of the Depreciation Period, Lessee shall
 have the option, upon at least one hundred twenty (120) days revocable
 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 the higher of the Termination Value as of
 such date or the fair market sales value of the aircraft (determined as set
 forth in clause (c) above and excluding the value of any Significant
 Expenditure) (such price, the "Burdensome Buyout Price").  In addition, if
 on such date there shall be any Secured Certificates outstanding, Lessee
 shall have the option to assume, pursuant to Section 7(u) 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, Lessee shall pay Lessor a purchase price equal to (I) the Burdensome
 Buyout Price minus (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), Lessor will
 transfer to Lessee, without recourse or warranty (except as to the absence
 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. 

           Section 21.    SECURITY FOR LESSOR'S OBLIGATION TO HOLDERS OF
 EQUIPMENT NOTES.  In order to secure the indebtedness evidenced by the
 Equipment Notes, 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 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(e)
 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 22.    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 23.    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 Cash Equivalents.  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 24.    JURISDICTION.  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 25.    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 26.    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 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 9 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 27.    LEASE FOR U.S. FEDERAL INCOME TAX LAW PURPOSES;
 SECTION 1110 OF BANKRUPTCY CODE

           (a)  Lease for Federal Income Tax Law Purposes.  Lessee and
 Lessor agree that this Lease is, and shall be treated for U.S. Federal
 income tax purposes as, a lease of the Aircraft, Airframe, Engines and
 Parts. 
           (b)  Section 1110 of Bankruptcy Code.  It is the intention of
 each of Lessee and Lessor that Lessor (and the Indenture Trustee as
 assignee of Lessor under the Trust Indenture) shall be entitled to the
 benefits of Section 1110 of the Bankruptcy Code with respect to the right
 to take possession of the Aircraft, Airframe, Engines and Parts as provided
 in this Lease.


           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:______________________________________
                              Title:___________________________________


                              US AIRWAYS, INC., 
                              Lessee 


                              By:______________________________________
                              Title:___________________________________



           Receipt of this original counterpart of the foregoing Lease is
 hereby acknowledged on the ___ day of _________, 199_. 

                              STATE STREET BANK AND TRUST COMPANY,
                              Indenture Trustee 


                              By:______________________________________
                              Title:___________________________________



 As set forth in Section 21 of the Lease (as defined below), Lessor has
 assigned to the Indenture Trustee (as defined herein) certain of its right,
 title and interest in and to the Lease and this Lease Supplement.  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
 applicable jurisdiction) no security interest in this Lease Supplement 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. 




                                                                  EXHIBIT A 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


                            LEASE SUPPLEMENT NO. 
                    (US Airways, Inc. Trust No.  N7__UW) 


           LEASE SUPPLEMENT NO. __, dated _________, 19___, between FIRST
 SECURITY BANK, NATIONAL ASSOCIATION, a national banking association, not in
 its individual capacity, but solely as Owner Trustee under the Trust
 Agreement (US Airways, Inc. Trust No.  N7__UW), dated as of __________  __,
 199_ with the Owner Participant named therein (such Owner Trustee, in its
 capacity as such Owner Trustee, being herein called "Lessor"), and US
 AIRWAYS, INC., a Delaware corporation ("Lessee"). 

           Lessor and Lessee have heretofore entered into that certain Lease
 Agreement (US Airways, Inc.  Trust No.  N7__UW), dated as of __________ __,
 199_, relating to one Airbus Model A319 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.   

           [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.](1)

           [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 _______________, 19__ to the
 Lease Agreement, has been recorded by the Federal Aviation Administration
 on ________________, 19__, as one document and assigned Conveyance No. 
 __.](2)
 --------------------  
 (1)    For use on Lease Supplement No. 1.

 (2)    For use on Lease Supplement No. 2 and thereafter.


           NOW, THEREFORE, in consideration of the premises and other good
 and sufficient consideration, Lessor and Lessee hereby agree as follows:   

           (a)  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 Model A319 aircraft (the "Aircraft"), which
 Aircraft as of the date hereof consists of the following components:

                          (i)  Airframe:  Airbus Model A319-112
      airframe bearing FAA Registration No. ______; manufacturer's
      serial no.  _____; and

                          (ii) Engines:  two (2) engines identified as
      CFM International 56-5B-6/P type aircraft 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).  

           (b)  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 ____________, 201_.

           (c)  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.

           (d)  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 Airbus Industrie G.I.E., or any subcontractor or supplier
 of Airbus Industrie G.I.E., under the Purchase Agreement or otherwise.  

           (e)  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.

           (f)  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.

           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 except as
                              expressly provided herein, but solely as
                              Owner Trustee, 
                              Lessor 


                              By:______________________________________
                                 Name: 
                                 Title: 


                              US AIRWAYS, INC., 
                              Lessee 


                              By_______________________________________
                                Name: 
                                Title: 



           (1) Receipt of this original counterpart of the foregoing Lease
 Supplement is hereby acknowledged on this     day of               , 19  . 

                              STATE STREET BANK AND TRUST COMPANY, 
                              Indenture Trustee 


                              By:______________________________________
                                 Name: 
                                 Title:  



 ------------------
  (1)   This language contained in the original counterpart only.




                                                                  EXHIBIT B 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


            PAST DUE RATE DEFINED; BASIC RENT AND LESSOR'S COST 


           The portion of this Exhibit appearing below will be intentionally
 deleted from the FAA filing counterpart as the parties hereto deem it to
 contain confidential information. 

           "Past Due Rate" means  (i) with respect to any 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 Equipment Notes, a rate per annum equal to 1% over the interest
 rate then in effect for such Equipment Notes, 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 1% over the Base Rate.  


 Basic Rent: 

                                 Basic Rent 
        Lease Period           (Percentage of 
            Date                Lessor's Cost) 
        ------------           ---------------
        * 

        ** 

 Lessor's Cost:  $_______________ 


 _______________ 
 *    Denotes payment in arrears from preceding Lease Period Date (or
      Delivery Date in the case of the first Lease Period) to specified
      Lease Period Date. 

 **   Denotes payment in advance from specified Lease Period Date to
      succeeding Lease Period Date.




                                                                  EXHIBIT C 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 

                         TERMINATION VALUE SCHEDULE 

           The portion of this Exhibit appearing below this text will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 

                    Termination           Termination
                    Value Date         Value Percentage 
                    -----------        ----------------






                                                                  EXHIBIT D 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


                                 EBO AMOUNT 

           The portion of this Exhibit appearing below this text will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 

                 EBO Date                     EBO Amount 
                 --------                     ----------






                                                                  EXHIBIT E 
                                                                         to 
                                                            Lease Agreement 
                                                 (US Airways, Inc.  N7__UW) 


                           RENT RECALCULATION AND 
                        INDEMNIFICATION VERIFICATION 

           The portion of this Exhibit appearing below this will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 

           Any recalculation of Basic Rent, Termination Value percentages
 and EBO Amount 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 the Owner Participant and
 reasonably acceptable to Lessee 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 10 (ten) or
 more basis points or causes a material reduction in Termination Value, EBO
 Amount or any indemnity payment (in which event the Owner Participant shall
 pay the reasonable costs and expenses of such verification process).  Such
 recalculated Basic Rent, Termination Value percentages and EBO amounts
 shall be set forth in a Lease Supplement or an amendment to the Lease.  

           "Net Economic Return" means the Owner Participant's after-tax
 yield and aggregate after-tax cash flow 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, Termination Value percentages and EBO Amount as of
 the Delivery Date.







                                                                  EXHIBIT F 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


               SCHEDULE OF DOMICILES OF PERMITTED SUBLESSEES 


                Australia           Malta 
                Austria             Mexico 
                Bahamas             Netherlands 
                Belgium             New Zealand 
                Bermuda             Norway 
                Brazil              People's Republic of China 
                Canada              Philippines 
                Denmark             Portugal 
                Finland             Republic of China (Taiwan)* 
                France              Singapore 
                Germany             South Korea 
                Grenada             Spain 
                Greece              Sweden 
                Iceland             Switzerland 
                India               Thailand 
                Ireland             Tobago 
                Italy               Trinidad 
                Jamaica             Turkey 
                Japan               United Kingdom 
                Luxembourg          Venezuela 
                Malaysia                                 


             *So long as on the date of the Sublease such country and the
 United States have diplomatic relations at least as good as those in effect
 on the Delivery Date.                    





                                                                  EXHIBIT G 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


                            RETURN CONDITIONS 

      The portion of this Exhibit appearing below this text will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 

           (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 Sections 9(b) or 15, unless
 Lessor has requested that Lessee return the Aircraft to a storage location
 pursuant to Section 5(b) (in which case the storage location provided in
 said Section 5(b) shall be deemed to be the return location), Lessee will
 return the Airframe to Lessor at one of Lessee's principal maintenance
 bases located 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.  At the time of such
 return, (i) Lessee will, at its own cost and expense, unless otherwise
 requested by Lessor to retain the existing registration of the Aircraft at
 least ninety (90) days prior to the date of 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 such registration is prohibited by
 reason of the failure of Lessor, Owner Participant or Lessor's designee to
 be eligible on such date to own an aircraft registered with the Federal
 Aviation Administration and (ii) the Airframe will be fully equipped with
 the Engines (or Acceptable Alternate Engines) installed thereon.  Also, at
 the time of such return, Lessor shall have good title to such Airframe and
 Engines or Acceptable Alternate Engines, and such Airframe and Engine or
 Acceptable Alternate Engines (A) shall be certified (or, if not then
 registered under the Transportation Code by reason of the proviso of clause
 (i) in the preceding sentence or because Lessor has so requested that the
 Aircraft not be so registered, shall hold a valid certificate of
 airworthiness issued by the country of registry and be eligible for
 certification by the Federal Aviation Administration) as an airworthy
 aircraft by the Federal Aviation Administration, (B) shall be free and
 clear of all Liens (other than 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,
 (C) shall be in a regular passenger configuration, and in as good a
 condition as when delivered by Seller to Lessee, ordinary wear and tear
 excepted, and otherwise in the condition required to be maintained under
 Lessee's FAA-approved maintenance plan (notwithstanding any Sublease
 theretofore in effect), (D) 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 immediately prior to such
 return but instead shall have been using a block overhaul program with
 respect to the Airframe, then (i) such block overhaul program shall have
 been approved by the government of registry of the Aircraft and (ii) 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, (E) 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 Acceptable Alternate 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 Acceptable Alternate Engines) on such Engines (or Acceptable
 Alternate Engines) remaining until the next scheduled engine heavy
 maintenance shall be at least 25% of the hours or cycles (whichever shall
 be applicable) between engine heavy maintenance allowed under the
 maintenance program then in use with respect to such Engines (or Acceptable
 Alternate Engines), (F) shall have all Lessee's and any Sublessee's
 exterior marking removed or painted over with areas thereof refinished to
 match adjacent areas, and (G) shall be in a state of cleanliness suitable
 under Lessee's normal service standards for operation in Lessee's revenue
 passenger service and in all such cases the Aircraft shall not have been
 discriminated against whether by reason of its leased status or otherwise
 in maintenance, use, operation or in any other manner whatsoever. 

           If clause (D) of the first paragraph of this subsection (a) shall
 be applicable but the Airframe does not meet the conditions specified in
 said clause (D), Lessee shall pay or cause to be paid to Lessor,
 concurrently with the return thereof, a Dollar amount computed by
 multiplying (i) 110% of the direct cost to Lessee (based upon the 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 (D) by (ii) a fraction of which (x) the
 numerator shall be the excess of 25% of the 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 (E) of the first paragraph of this subsection (a) shall
 be applicable but the Engines (or Acceptable Alternate Engines) do not meet
 the conditions specified in said clause (E), Lessee shall pay or cause to
 be paid to Lessor, concurrently with the return thereof, a Dollar amount
 computed by multiplying (i) 110% of the direct cost to Lessee (based upon
 the 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 (or Acceptable Alternate Engines) the scheduled engine
 heavy maintenance under the maintenance program then used by Lessee for
 engines of the same model as the Engines (or Acceptable Alternate Engines)
 by (ii) a fraction which (x) the numerator shall be the excess of 25% of
 the hours or cycles (whichever is applicable) of operation of one Engine
 between engine heavy maintenance allowable under the maintenance program
 then in use with respect to such Engines (or Acceptable Alternate Engines)
 over the actual average number of hours or cycles of operation of such
 Engines (or Acceptable Alternate Engines) remaining until the next such
 scheduled engine heavy maintenance and (y) the denominator shall be the
 number of hours or cycles allowable between such scheduled engine heavy
 maintenance. 

           (b)  Return of the Engines.  In the event that an Acceptable
 Alternate Engine shall be delivered with the returned Airframe as set forth
 in subsection (a) of this Exhibit G, 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
 Acceptable Alternate Engine, in form and substance satisfactory to Lessor
 (together with an opinion of counsel (which may be Lessee's General Counsel
 or other senior attorney) 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 each such Acceptable Alternate Engine is
 free and clear of all Liens other than Lessor Liens, Loan Participant Liens
 and Indenture Trustee Liens), against receipt from Lessor of a bill of sale
 or evidencing the transfer, without recourse or warranty (except as to the
 absence of Lessor Liens), by Lessor to Lessee or its designee of all of
 Lessor's right, title and interest in and to any Engine not installed on
 the Airframe at the time of the return of the Airframe.  

           (c)  Fuel and Manuals.  Upon the return of the Airframe upon any
 termination of this Lease in accordance with subsection (a) of this Exhibit
 G, (i) Lessor shall pay to Lessee, the amount of Lessee's cost for any fuel
 or oil contained in the fuel or oil tanks of such Airframe and (ii) Lessee
 shall deliver or cause to be delivered to Lessor all logs, manuals and data
 and inspection, modification and overhaul records required to be maintained
 under the provisions of the Lease.




                                                                  EXHIBIT H 
                                                                         to 
                                                            Lease Agreement 
                                      (US Airways, Inc.  Trust No.  N7__UW) 


                                    INSURANCE

      The portion of this Exhibit appearing below this text will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 


           (a)  Public Liability and Property Damage Insurance.  (1) Except
 as provided in clause (2) of this subsection (a), and subject to self-
 insurance to the extent permitted by subsection (d) of this Exhibit H,
 Lessee will carry or cause to be carried with respect to the Aircraft at
 its or any Sublessee's expense (i) comprehensive airline liability
 (including, without limitation, passenger, contractual, bodily injury and
 property damage liability) insurance (exclusive of manufacturer's product
 liability insurance) and (ii) cargo liability insurance, (A) in an amount
 not less than the greater of (x) the amounts of comprehensive airline
 liability insurance from time to time applicable to aircraft owned or
 leased, and operated by Lessee (or, if a Sublease is then in effect, by
 Sublessee) of the same type as the Aircraft and (y) $300 million per
 occurrence, (B) of the type and covering the same risks as from time to
 time applicable to aircraft owned or leased and operated by Lessee of the
 same type as the Aircraft, and (C) which is maintained in effect with
 insurers of recognized reputation and responsibility; provided, however,
 that Lessee need not maintain such cargo liability insurance, or may
 maintain such cargo liability insurance in an amount less than $300 million
 per occurrence, so long as the amount of cargo liability insurance, if any,
 maintained with respect to the Aircraft is not less than the cargo
 liability insurance, if any, maintained for other Airbus Model A319
 aircraft owned or leased and operated by Lessee. 

           (2) During any period that the Airframe or an Engine, as the case
 may be, is on the ground and not in operation, Lessee may carry or cause to
 be carried as to such non-operating property, in lieu of the insurance
 required by clause (1) above, and subject to the self-insurance to the
 extent permitted by subsection (d) hereof, insurance by insurers of 
 recognized reputation and responsibility otherwise conforming with the
 provisions of said clause (1) except that (A) the amounts of coverage shall
 not be required to exceed the amounts of comprehensive airline liability
 from time to time applicable to property owned or leased by Lessee of the
 same type as such non-operating property and which is 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 leased by Lessee of the same type as such non-operating
 property and which is on the ground and not in operation. 

           (b)  Insurance Against Loss or Damage to the Aircraft. 
 (1) Except as provided in clause (2) of this subsection (b), and subject to
 the provisions of subsection (d) of this Exhibit H permitting the self-
 insurance, Lessee shall maintain or cause to be maintained in effect, at
 its or any Sublessee's expense, with insurers of recognized responsibility,
 all-risk aircraft hull insurance covering the Aircraft and fire and
 extended coverage and all-risk aircraft hull insurance covering Engines and
 Parts while temporarily removed from the Aircraft and not replaced by
 similar components; provided that such insurance shall at all times while
 the Aircraft is subject to this Lease be for an amount (taking into account
 the self-insurance to the extent permitted by subsection (d) of this
 Exhibit H) not less than the Termination Value for the Aircraft; provided
 further, that, subject to compliance with subsection (d) of this Exhibit H,
 such all-risk property damage insurance covering Engines and Parts
 temporarily removed from an Airframe or an airframe or (in the case of
 Parts) an Engine need be obtained only to the extent available at
 reasonable cost (as reasonably determined by Lessee).  In the case of a
 Loss with respect to an engine (other than an Engine) installed on the
 airframe in circumstances which do not constitute an Event of Loss with
 respect to the Airframe, Lessor shall promptly remit any payment made to it
 of any insurance proceeds in respect of such Loss to Lessee or any other
 third party that is entitled to receive such proceeds.  

           Unless an Event of Default has occurred and is continuing, all
 losses will be adjusted by Lessee with the insurers.  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) and the Owner Participant for reasonable costs and
           expenses, as shall not exceed the Termination Value and the other
           amounts payable pursuant to Section 10(a) hereof shall be applied
           in reduction of Lessee's obligation to pay such Termination Value
           and other amounts payable pursuant to Section 10(a) hereof, if
           not already paid by Lessee, or, if already paid by Lessee, shall
           be applied to reimburse Lessee for its payment of such
           Termination Value and such other amounts payable, 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) and the Owner
           Participant 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). 

           (2)  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 (1) above, and subject to self-insurance to
 the extent permitted by subsection (d) of this Exhibit H, insurance
 otherwise conforming with the provisions of said clause (1) 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 leased by Lessee (or, if a Sublease
 is then in effect, by Sublessee) of the same type as the Aircraft similarly
 on the ground and not in operation, provided that, subject to self-
 insurance to the extent permitted by subsection (d) of this Exhibit H,
 Lessee shall maintain insurance against risk of loss or damage to the
 Aircraft in an amount at least equal to the Termination Value of the
 Aircraft during such period that the Aircraft is on the ground and not in
 operation. 

           (3)  If Lessee (or any Sublessee) shall at any time operate or
 propose to operate the Aircraft, Airframe or any Engine (i) in any area of
 recognized hostilities or (ii) on international routes, and war-risk,
 hijacking or allied perils insurance is maintained by Lessee (or any
 Sublessee) with respect to other aircraft owned and operated by Lessee (or
 any Sublessee) on such routes or in such areas, Lessee shall maintain or
 cause to be maintained war-risk, hijacking and related perils insurance of
 substantially the same type carried by major United States commercial air
 carriers operating the same or comparable models of aircraft on similar
 routes or in such areas and in no event in an amount less than the
 Termination Value. 

           (c)  Reports, etc.  Lessee will furnish, or cause to be
 furnished, to Lessor, the Indenture Trustee, the Owner Participant and the
 Pass Through Trustee, on or before the Delivery Date and on each annual
 anniversary date of Lessee's applicable insurance, a report, signed by
 Lessee's regular insurance broker or any other independent firm of
 insurance brokers reasonably acceptable to Lessor which brokers may be in
 the regular employ of Lessee (the "Insurance Brokers"), describing in
 reasonable detail the hull and liability insurance (and property insurance
 for detached engines and parts) then carried and maintained with respect to
 the Aircraft and stating the opinion of such firm that the insurance
 complies with the terms hereof; provided, that all information contained in
 the foregoing report shall not be made available by Lessor, the Indenture
 Trustee or the Owner Participant or the Pass Through Trustee to anyone
 except (i) to prospective and permitted transferees of Lessor's, the Owner
 Participant's, the Indenture Trustee's or the Pass Through Trustee's
 interest or their respective counsel, independent certified public
 accountants and independent insurance brokers or other agents, who agree to
 hold such information confidential, (ii) to Lessor's, the Owner
 Participant's, the Indenture Trustee's or a Pass Through Trustee's counsel
 or independent certified public accountants, independent insurance brokers
 or agents who agree to hold such information confidential or (iii) as may
 be required by any statute, court or administrative order or decree or
 governmental ruling or regulation; provided, however that any disclosure
 permitted by clause (iii) above shall be made only to the extent necessary
 to meet the specific requirements or needs of the Persons to whom such
 disclosures are hereby permitted.  Lessee will cause such Insurance Broker
 to agree to advise Lessor, the Indenture Trustee, the Owner Participant and
 the Pass Through Trustee in writing of any 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 and to
 advise in writing at least thirty (30) days (seven (7) days in the case of
 war risk and allied perils coverage) and ten (10) days notice with respect
 to the Electronic Date Recognition Exclusion Limited Coverage Endorsement,
 prior to the cancellation or material adverse change of any insurance
 maintained pursuant to Section 11, provided that if the notice period
 specified above is not reasonably obtainable, the Insurance Broker shall
 provide for as long a period of prior notice as shall then be reasonably
 obtainable.  In addition, Lessee will also cause such Insurance Brokers to
 deliver to Lessor, the Indenture Trustee, the Owner Participant and the
 Pass Through 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 Lessee to such parties on the Delivery Date except for such
 changes in the report or the coverage consistent with the terms hereof.  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, but shall be under no duty to, 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; 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). 

           (d)  Self-Insurance.  Lessee may self-insure by way of
 deductible, premium adjustment or franchise provisions or otherwise
 (including, with respect to insurance maintained pursuant to subsection (b)
 of this Exhibit H, insuring for an amount that is less than the Termination
 Value of the Aircraft) the risks required to be insured against pursuant to
 Section 11 under a program applicable to all aircraft (whether owned or
 leased) in Lessee's fleet, but in no case shall the aggregate amount of
 self-insurance in regard to subsection (a) and (b) of this Exhibit H exceed
 for any policy year, with respect to all of the aircraft (whether owned or
 leased) in Lessee's fleet (including, without limitation, the Aircraft),
 the lesser of (i) 50% of the highest replacement value of any single
 aircraft in Lessee's fleet or (ii) 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, unless an insurance broker of national standing shall certify
 that the standard among all other major United States airlines is a higher
 level of self-insurance, in which case Lessee may insure the Aircraft to
 such higher level.  In addition to the foregoing right to self-insure,
 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 customary in the airline
 industry imposed by the aircraft hull or liability insurer.  

           (e)  Terms of Policies.  Any policies of insurance carried in
 accordance with subsection (a) or (b) of this Exhibit H and any policies
 taken out in substitution or replacement for any of such policies (A) shall
 be amended to name the Additional Insureds as their respective interests
 may appear, (B) may provide for the self-insurance to the extent permitted
 in subsection (d) of this Exhibit H, (C) 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
 Additional Insureds, or such insurance shall lapse for non-payment of
 premium, such cancellation, lapse or change shall not be effective as to
 the Additional Insureds for thirty (30) days (ten (10) days in the case of
 war risk and allied perils coverage) after issuance to the Additional
 Insureds, 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, (D) shall provide that in respect of the respective interests
 of the Additional Insureds 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 the
 Additional Insureds 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), (E) shall be primary without
 right of contribution from any other insurance which is carried by any
 Additional Insured, (F) 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, (G) 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 any Additional Insured to the extent of any moneys due to any Additional
 Insured, and (H) shall provide that (i) in the event of a loss involving
 proceeds in excess of $5,000,000, the proceeds in respect of such loss up
 to an amount equal to the Termination 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
 (and all earnings thereon) to Lessee or its order, and (ii) the entire
 amount of any loss involving proceeds of $5,000,000 or less or the amount
 of any proceeds of any loss in excess of the Termination 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.  




EXHIBIT 4(a)(xv)
                                                              Indenture 
                                                           Trust N7___UW



                    TRUST INDENTURE AND SECURITY AGREEMENT  
                     (US Airways, Inc.  Trust No.  N7__UW) 

                        Dated as of __________  __, 199_ 

                                      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  

                                  Indenture Trustee 




                            EQUIPMENT NOTES COVERING 
                            ONE AIRBUS A319 AIRCRAFT  
                     BEARING U.S. REGISTRATION MARK N7__UW 
                            LEASED BY US AIRWAYS, INC. 






                                                                        Page
 TABLE OF CONTENTS 

 ARTICLE I
 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

      SECTION 1.01.  Definitions . . . . . . . . . . . . . . . . . . . . . 7

 ARTICLE II
 THE EQUIPMENT NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

      SECTION 2.01.  Form of Equipment Notes.  . . . . . . . . . . . . .  7 
      SECTION 2.02.  Issuance and Terms of Equipment Notes.  . . . . . .  12
      SECTION 2.03.  Payments from Trust Indenture Estate Only . . . . .  15
      SECTION 2.04.  Method of Payment . . . . . . . . . . . . . . . . .  17
      SECTION 2.05.  Application of Payments . . . . . . . . . . . . . .  20
      SECTION 2.06.  Termination of Interest in Trust Indenture
                       Estate  . . . . . . . . . . . . . . . . . . . . .  20
      SECTION 2.07.  Registration, Transfer and Exchange of
                       Equipment Notes . . . . . . . . . . . . . . . . .  20
      SECTION 2.08.  Mutilated, Destroyed, Lost or Stolen
                       Equipment Notes . . . . . . . . . . . . . . . . .  22 
      SECTION 2.09.  Payment of Expenses on Transfer; Cancellation . . .  23
      SECTION 2.10.  Mandatory Redemptions of Equipment Notes  . . . . .  23
      SECTION 2.11.  Voluntary Redemptions of Equipment Notes  . . . . .  23
      SECTION 2.12.  Redemptions; Notice of Redemption . . . . . . . . .  24
      SECTION 2.13.  Assumption of Equipment Notes by Lessee . . . . . .  25
      SECTION 2.14.  Option to Purchase Equipment Notes  . . . . . . . .  25
      SECTION 2.15.  Subordination . . . . . . . . . . . . . . . . . . .  27

 ARTICLE III
 RECEIPT, DISTRIBUTION AND APPLICATION OF 
 INCOME FROM THE TRUST INDENTURE ESTATE  . . . . . . . . . . . . . . . .  28

      SECTION 3.01.  Basic Rent Distribution . . . . . . . . . . . . . .  28
      SECTION 3.02.  Event of Loss; Replacement; Voluntary
                       Termination; Refinancing  . . . . . . . . . . . .  29
      SECTION 3.03.  Payments After Event of Default . . . . . . . . . .  30
      SECTION 3.04.  Certain Payments  . . . . . . . . . . . . . . . . .  32
      SECTION 3.05.  Other Payments  . . . . . . . . . . . . . . . . . .  33
      SECTION 3.06.  Payments to Owner Trustee . . . . . . . . . . . . .  33

 ARTICLE IV
 COVENANTS OF OWNER TRUSTEE; EVENTS OF 
 DEFAULT; REMEDIES OF INDENTURE TRUSTEE  . . . . . . . . . . . . . . . .  34

      SECTION 4.01.  Covenants of Owner Trustee  . . . . . . . . . . . .  34
      SECTION 4.02.  Event of Default  . . . . . . . . . . . . . . . . .  35
      SECTION 4.03.  Certain Rights  . . . . . . . . . . . . . . . . . .  37
      SECTION 4.04.  Remedies  . . . . . . . . . . . . . . . . . . . . .  39
      SECTION 4.05.  Return of Aircraft, Etc . . . . . . . . . . . . . .  41
      SECTION 4.06.  Remedies Cumulative . . . . . . . . . . . . . . . .  43
      SECTION 4.07.  Discontinuance of Proceedings . . . . . . . . . . .  43
      SECTION 4.08.  Waiver of Past Defaults . . . . . . . . . . . . . .  43
      SECTION 4.09.  Appointment of Receiver . . . . . . . . . . . . . .  44
      SECTION 4.10.  Indenture Trustee Authorized to Execute
                       Bills of Sale, Etc.   . . . . . . . . . . . . . .  44
      SECTION 4.11.  Rights of Note Holders to Receive Payment . . . . .  44

 ARTICLE V
 DUTIES OF THE INDENTURE TRUSTEE . . . . . . . . . . . . . . . . . . . .  45

      SECTION 5.01.  Notice of Event of Default  . . . . . . . . . . . .  45
      SECTION 5.02.  Action upon Instructions; Certain Rights and
                       Limitations . . . . . . . . . . . . . . . . . . .  46
      SECTION 5.03.  Indemnification.  . . . . . . . . . . . . . . . . .  49
      SECTION 5.04.  No Duties Except as Specified in Trust
                       Indenture or Instructions . . . . . . . . . . . .  49
      SECTION 5.05.  No Action Except Under Lease, Trust Indenture
                       or Instructions . . . . . . . . . . . . . . . . .  50
      SECTION 5.06.  Replacement Airframes and Replacement Engines . . .  50
      SECTION 5.07.  Indenture Supplements for Replacements  . . . . . .  54
      SECTION 5.08.  Effect of Replacement . . . . . . . . . . . . . . .  54
      SECTION 5.09.  Investment of Amounts Held by Indenture Trustee . .  54

 ARTICLE VI
 THE OWNER TRUSTEE AND THE INDENTURE TRUSTEE . . . . . . . . . . . . . .  55

      SECTION 6.01.  Acceptance of Trusts and Duties.  . . . . . . . . .  55
      SECTION 6.02.  Absence of Duties.  . . . . . . . . . . . . . . . .  55
      SECTION 6.03.  No Representations or Warranties as to
                       Aircraft or Documents.  . . . . . . . . . . . . .  56
      SECTION 6.04.  No Segregation of Monies; No Interest.  . . . . . .  57
      SECTION 6.05.  Reliance; Agreements; Advice of Counsel.  . . . . .  57
      SECTION 6.06.  Capacity in Which Acting.   . . . . . . . . . . . .  58
      SECTION 6.07.  Compensation.   . . . . . . . . . . . . . . . . . .  58
      SECTION 6.08.  Instructions from Note Holders.   . . . . . . . . .  58

 ARTICLE VII
 INDEMNIFICATION OF INDENTURE TRUSTEE BY OWNER TRUSTEE . . . . . . . . .  59

      SECTION 7.01.  Scope of Indemnification.   . . . . . . . . . . . .  59

 ARTICLE VIII
 SUCCESSOR AND SEPARATE TRUSTEES . . . . . . . . . . . . . . . . . . . .  60

      SECTION 8.01.  Notice of Successor Owner Trustee.  . . . . . . . .  60
      SECTION 8.02.  Resignation of Indenture Trustee; Appointment
                       of Successor  . . . . . . . . . . . . . . . . . .  60
      SECTION 8.03.  Appointment of Additional and Separate Trustees.  .  61

 ARTICLE IX
 SUPPLEMENTS AND AMENDMENTS TO THIS TRUST INDENTURE
 AND OTHER DOCUMENTS   . . . . . . . . . . . . . . . . . . . . . . . . .  63

      SECTION 9.01.  Instructions of Majority; Limitations.  . . . . . .  63
      SECTION 9.02.  Trustees Protected.   . . . . . . . . . . . . . . .  66
      SECTION 9.03.  Documents Mailed to Note Holders.   . . . . . . . .  66
      SECTION 9.04.  No Request Necessary for Lease Supplement or
                       Trust Agreement and Indenture Supplement  . . . .  66

 ARTICLE X
 MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66

      SECTION 10.01. Termination of Trust Indenture.   . . . . . . . . .  66
      SECTION 10.02. No Legal Title to Trust Indenture Estate in
                        Note Holders.  . . . . . . . . . . . . . . . . .  67
      SECTION 10.03. Sale of Aircraft by Indenture Trustee Is Binding. .  67
      SECTION 10.04. Trust Indenture for Benefit of Owner Trustee,
                        Indenture  . . . . . . . . . . . . . . . . . . .  68
      SECTION 10.05. Notices.  . . . . . . . . . . . . . . . . . . . . .  68
      SECTION 10.06. Severability.   . . . . . . . . . . . . . . . . . .  68
      SECTION 10.07. No Oral Modification or Continuing Waivers.   . . .  69
      SECTION 10.08. Successors and Assigns.   . . . . . . . . . . . . .  69
      SECTION 10.09. Headings.   . . . . . . . . . . . . . . . . . . . .  69
      SECTION 10.10. Normal Commercial Relations.  . . . . . . . . . . .  69
      SECTION 10.11. Governing Law; Counterpart Form.  . . . . . . . . .  70
      SECTION 10.12. Voting By Note Holders.   . . . . . . . . . . . . .  70
      SECTION 10.13. Bankruptcy.   . . . . . . . . . . . . . . . . . . .  70
      SECTION 10.14. No Action Contrary to Lessee's Rights Under
                       the Lease.  . . . . . . . . . . . . . . . . . . .  70


 EXHIBIT A      TRUST AGREEMENT AND INDENTURE SUPPLEMENT . . .  EXHIBIT A-1 


 SCHEDULE I     SERIES A . . . . . . . . . . . . . . . . . . . SCHEDULE I-2 
                SERIES B . . . . . . . . . . . . . . . . . . . SCHEDULE I-3 
                SERIES C . . . . . . . . . . . . . . . . . . . SCHEDULE I-4 

 SCHEDULE II    PASS THROUGH TRUST AGREEMENT AND
                PASS THROUGH TRUST SUPPLEMENTS . . . . . . . . SCHEDULE II-1 




                  TRUST INDENTURE AND SECURITY AGREEMENT  
                    (US Airways, Inc. Trust No.  N7__UW) 

            TRUST INDENTURE AND SECURITY AGREEMENT (US Airways, Inc. Trust
 No. N7__UW), dated as of _________  __, 199_ ("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, as Indenture Trustee hereunder (together with its successors
 hereunder, the "Indenture Trustee"). 

                            W I T N E S S E T H 

            WHEREAS, the Owner Participant and the Owner Trustee 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 Equipment Notes 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 Equipment Notes 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 Note Holders, subject to Section 2.15
 and Article III hereof; 

            WHEREAS, all things have been done to make the Equipment Notes,
 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: 

                              GRANTING CLAUSE 

            NOW, THEREFORE, THIS TRUST INDENTURE AND SECURITY AGREEMENT
 WITNESSETH, that, to secure (i) the prompt payment of the Principal Amount
 of, interest on, Make-Whole Amount, if any, and all other amounts due with
 respect to, all Equipment Notes from time to time outstanding hereunder and
 (ii) the performance and observance by the Owner Trustee of all the
 agreements, covenants and provisions herein and in the Participation
 Agreement and the Equipment Notes contained, for the benefit of the Note
 Holders, the Loan Participants and each of the Indenture Indemnitees and
 the prompt payment of all amounts from time to time owing hereunder, under
 the Participation Agreement and under the Lease to the Note Holders, the
 Loan Participants or any Indenture Indemnitee by the Owner Trustee or
 Lessee (the "Secured Obligations") 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 Equipment Notes 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 Note 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, EBO Amount,
 Supplemental Rent and payments of any kind thereunder (excluding any
 Excluded Payments)); 

            (3)  the Purchase Agreement (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 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 

            (7)  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 Note Holders, the Loan Participants and the
 Indenture Indemnitees except as provided in Section 2.15 and Article III
 hereof without any preference, distinction or priority of any one Equipment
 Note 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 (7) 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 Loan Participants, Indenture Indemnitees, Indenture Trustee and the
 Note Holders shall have no obligation or liability under the Indenture
 Agreements, by reason of or arising out of the assignment hereunder, nor
 shall the Loan Participants, Indenture Indemnitees, Indenture Trustee or
 the Note 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 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 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 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, EBO Amount, Termination Value or
                     any other payment to be made pursuant to Section 9, 10
                     or 19 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 (other than Excluded
                     Payments), including Basic Rent, EBO Amount,
                     Termination Value or any other payment to be made
                     pursuant to Section 9, 10 or 19 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.  

            IT IS HEREBY COVENANTED AND AGREED by and between the parties
 hereto as follows: 


                                  ARTICLE I
                                 DEFINITIONS

        SECTION 1.01.  Definitions.  For all purposes of this Indenture,
 capitalized terms used but not defined herein shall have the respective
 meanings set forth or incorporated by reference, and shall be construed and
 interpreted in the manner described, in Annex A.  


                                 ARTICLE II
                             THE EQUIPMENT NOTES

        SECTION 2.01.  Form of Equipment Notes.

        The Equipment Notes shall be substantially in the form set forth
 below: 

        THIS EQUIPMENT NOTE 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
        EQUIPMENT NOTE MAY NOT BE SOLD UNLESS EITHER REGISTERED
        UNDER THE ACT AND SUCH APPLICABLE STATE LAWS OR AN EXEMPTION
        FROM SUCH REGISTRATIONS IS AVAILABLE.   

        FIRST SECURITY BANK, NATIONAL ASSOCIATION, AS OWNER TRUSTEE
        UNDER TRUST AGREEMENT (US AIRWAYS, INC.  TRUST NO.  N7__UW)
        DATED AS OF _______  __, 199_. 

        SERIES [___] NON-RECOURSE EQUIPMENT NOTE DUE [___] ISSUED IN
        CONNECTION WITH THE AIRBUS A-___ AIRCRAFT BEARING UNITED
        STATES REGISTRATION NUMBER _____.   

 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 (US Airways, Inc. 
 Trust No.  N7__UW), dated as of _________ __, 199_, between the Owner
 Participant named therein and the Owner Trustee (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 Equipment Note shall be payable on the
 dates and in the installments as set forth in Schedule I hereto.  Accrued
 but unpaid interest shall be due and payable in semi-annual installments
 commencing _______ 30, ____, and thereafter on _______ 30 and ______ 30 of
 each year, to and including _______, _____.  Notwithstanding the foregoing,
 the final payment made on this Equipment Note 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 Equipment
 Note.  Notwithstanding anything to the contrary contained herein, if any
 date on which a payment under this Equipment Note 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 if 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. 

        For purposes hereof, the term "Trust Indenture" means the Trust
 Indenture and Security Agreement (US Airways, Inc. Trust No. N7__UW), dated
 as of ___________ __, 199_, 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
 Equipment Note and not defined herein shall have the respective meanings
 assigned in the Trust Indenture. 

        This Equipment Note 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 the Principal Amount of, interest on, Make-Whole
 Amount, if any, and all other amounts due hereunder by the Owner Trustee of
 every obligation or covenant contained in the 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
 Section 2.03 and Article III of the Trust Indenture and each holder hereof,
 by its acceptance of this Equipment Note, 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, in its individual
 capacity, 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 Equipment
 Note or, except as expressly 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 Equipment Note 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 Equipment Note 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 Equipment Note Register for the purpose
 of registering transfers and exchanges of Equipment Notes 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 Equipment Note,
 except that in the case of any final payment with respect to this Equipment
 Note, the Equipment Note shall be surrendered promptly thereafter to the
 Indenture Trustee for cancellation. 

        The holder hereof, by its acceptance of this Equipment Note, agrees
 that, except as provided in the Trust Indenture, each payment of an
 installment of the Principal Amount, Make-Whole Premium, if any, and
 interest received by it hereunder shall be applied, first, to the payment
 of accrued interest on this Equipment Note (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 Equipment Note (or portion hereof) then due (other than by reason
 of redemption), 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 the Principal
 Amount hereof  remaining unpaid and due by reason of redemption.  The
 amounts paid pursuant to clause fourth of the preceding sentence shall be
 applied to installments of the Principal Amount of this Equipment Note
 remaining unpaid in the inverse order of their normal maturity.  

        This Equipment Note is one of the Equipment Notes 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
 Equipment Notes.  The provisions of this Equipment Note 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 Equipment Note and the rights and obligations of the holders of,
 and the nature and extent of the security for, any other Equipment Notes
 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 Equipment Note.   

        As provided in the Trust Indenture and subject to certain
 limitations therein set forth, this Equipment Note is exchangeable for a
 like aggregate Principal Amount of Equipment Notes of different authorized
 denominations, as requested by the holder surrendering the same. 

        Prior to the due presentment for registration of transfer of this
 Equipment Note, the Owner Trustee and the Indenture Trustee shall deem and
 treat the Person in whose name this Equipment Note is registered on the
 Equipment Note Register as the absolute owner and holder hereof for the
 purpose of receiving all amounts payable with respect to this Equipment
 Note and for all purposes, and neither of the Owner Trustee nor the
 Indenture Trustee shall be affected by notice to the contrary. 

        This Equipment Note is subject to redemption as provided in
 Sections 2.10, 2.11 and 2.12 of the Trust Indenture but not otherwise. 
 This Equipment Note 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 Equipment Note 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
 Equipment Notes](1)  [Series A and Series B Equipment Notes](2), and this
 Equipment Note is issued subject to such provisions.  The Note Holder of
 this Equipment Note, 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.](3)
 -----------------
 (1)   To be inserted in the case of a Series B Equipment Note.  

 (2)   To be inserted in the case of a Series C Equipment Note. 

 (3)    To be inserted for each Equipment Note other than any
        Series A Equipment Note.

        Unless the certificate of authentication hereon has been executed
 by or on behalf of the Indenture Trustee by manual signature, this
 Equipment Note shall not be entitled to any benefit under the Trust
 Indenture or be valid or obligatory for any purpose. 

        THIS EQUIPMENT NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
 ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK. 

                                 *   *   * 

        IN WITNESS WHEREOF, the Owner Trustee has caused this Equipment
 Note 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 OFAUTHENTICATION  

        This is one of the Equipment Notes 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: 




                                SCHEDULE I 

                       EQUIPMENT NOTES AMORTIZATION 


 Payment Date                                   Principal Amount to be Paid 
 ------------                                   ---------------------------

                      [SEE SCHEDULE I TO TRUST INDENTURE 
                      WHICH IS INSERTED UPON ISSUANCE] 

                                 *   *   * 


           SECTION 2.02.   Issuance and Terms of Equipment Notes. 

           The Equipment Notes 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 date hereof, each
 Equipment Note shall be issued to the Pass Through Trustees (or their
 designee) under the Pass Through Agreements as set forth in Schedule II
 hereto in connection therewith. The Equipment Notes shall be issued in
 registered form only.  The Equipment Notes shall be issued in denominations
 of $1,000 and integral multiples thereof, except that one Equipment Note of
 each Series may be in an amount that is not an integral multiple of $1,000. 

           Each Equipment Note 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 ________ 30, ____, and on each ______ 30
 and ______ 30 thereafter until maturity.  The Principal Amount of each
 Equipment Note shall be payable on the dates and in the installments as set
 forth in Schedule I which shall be attached to the Equipment Notes. 
 Notwithstanding the foregoing, the final payment made under each Equipment
 Note 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 Equipment Note.  Each Equipment Note 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 Equipment Note 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 if 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. 

           The Owner Trustee agrees to pay to the Indenture Trustee for
 distribution in accordance with Section 3.04 hereof (i) to the extent not
 payable (whether or not in fact paid) under Section 7(a) of the Note
 Purchase Agreement (as originally in effect or as amended with the consent
 of the Owner Participant) an amount or amounts equal to the fees payable to
 the Liquidity Provider under Section 2.03 of each Liquidity Facility and
 the related Fee Letter (as defined in the Intercreditor Agreement)
 multiplied by a fraction the numerator  of which shall be the then
 outstanding aggregate principal amount of the Series A Equipment Notes,
 Series B Equipment Notes and Series C Equipment Notes and the denominator
 of which shall be the then outstanding aggregate principal amount of all
 "Series A Equipment Notes", "Series B Equipment Notes" and "Series C
 Equipment Notes" (in each case as defined in the relevant Operative
 Indenture) issued under the Operative Indentures; (ii) (x) the amount equal
 to interest on any Downgrade Advance  (other than any Applied Downgrade
 Advance) payable under Section 3.07 of each Liquidity Facility minus
 Investment Earning from such Downgrade Advance multiplied by (y) the
 fraction specified in the foregoing clause (i); (iii) (x) the amount equal
 to interest on any Non-Extension Advance (other than any Applied Non-
 Extension Advance) payable under Section 3.07 of each Liquidity Facility
 minus Investment Earnings from such Non-Extension Advance multiplied by (y)
 the fraction specified in the foregoing clause (i); (iv) if any payment
 default shall have occurred and be continuing with respect to interest on
 any Series A Equipment Note, Series B Equipment Note or Series C Equipment
 Note, (x) the excess, if any, of (1) the amount equal to interest on any
 Unpaid Advance,  Applied Downgrade Advance or Applied  Non-Extension
 Advance payable  under  Section 3.07 of each Liquidity Facility over (2)
 the sum of Investment Earnings from any Final Advance plus any amount of
 interest at the Past Due Rate actually payable  (whether or not in fact
 paid) by the Owner Trustee in respect of the overdue scheduled  interest on
 the Equipment Notes in respect of which such Unpaid Advance, Applied
 Downgrade Advance or Applied Non-Extension Advance was made multiplied by
 (y) a fraction the numerator of which shall be the then aggregate overdue
 amounts of interest on the Series A Equipment Notes, Series B Equipment
 Notes and Series C  Equipment Notes (other than interest becoming due and
 payable solely as a result of  acceleration of any such Equipment Notes)
 and the denominator of which shall be the then aggregate overdue amounts of
 interest on all "Series A Equipment Notes", "Series B Equipment  Notes" and
 "Series C Equipment Notes" (in each case as defined in the relevant
 Operative Indenture) issued under the Operative Indentures  (other than
 interest becoming due and payable solely as a result of acceleration of any
 such "Equipment Notes") and (v) 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
 (i), (ii), (iii) or (iv) above multiplied by the fraction specified in the
 foregoing clause (i).  For purposes of this paragraph, the terms "Applied
 Downgrade Advance", "Applied Non-Extension Advance", "Cash Collateral
 Account", "Downgrade Advance", "Final Advance", "Investment Earnings",
 "Non-Extension Advance" and "Unpaid Advance" shall have the meanings
 specified in each Liquidity Facility or the Intercreditor Agreement. 

           The Equipment Notes 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.  Equipment
 Notes 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 Equipment Notes or did not hold
 such offices at the respective dates of such Equipment Notes. The Owner
 Trustee may from time to time execute and deliver Equipment Notes with
 respect to the Aircraft to the Indenture Trustee for authentication upon
 original issue and such Equipment Notes 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 Equipment
 Notes to be authenticated hereunder on original issue with respect to the
 Aircraft. No Equipment Note 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 Equipment Note 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 Equipment Notes shall be conclusive evidence, and the only
 evidence, that such Equipment Note 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 Note Holders under this
 Trust Indenture, each Note Holder, by its acceptance of a Equipment Note,
 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 Equipment Notes, 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 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 Equipment Notes 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. 

           (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 Note Holder or the Indenture Trustee, directly or
 indirectly (other than the recourse liability of the Owner Trustee (in its
 individual capacity)), to make payment on account of any amount payable as
 principal, Make-Whole Amount, if any, interest or other amounts on the
 Equipment Notes or under this Indenture and (iii) any Note Holder or the
 Indenture Trustee actually receives any Indenture 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 Note 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
 Indenture Excess Amount.

           For purposes of this Section 2.03(b), "Indenture Excess Amount"
 means the amount by which such payment exceeds the amount that would have
 been received by a Note 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 Note 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 Equipment Note or hereunder will be
 payable in Dollars by wire transfer of immediately available funds not
 later than [11:00 a.m.], New York City time, on the due date of payment to
 the Indenture Trustee at the Corporate Trust Office for distribution among
 the Note Holders in the manner provided herein.  The Owner Trustee shall
 not have any responsibility for the distribution of such payment to any
 Note Holder. Notwithstanding the foregoing or any provision in any
 Equipment Note to the contrary, the Indenture Trustee will use reasonable
 efforts to pay or cause to be paid, if so directed in writing by any Note
 Holder (with a copy to the Owner Trustee), all amounts paid by the Owner
 Trustee hereunder and under such holder's Equipment Note or Equipment Notes
 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 Federal Funds 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 Equipment Note, except that, in
 the case of the final payment in respect of any Equipment Note, such
 Equipment Note 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
 11:00 a.m., New York City time, at the place of payment.  Prior to the due
 presentment for registration of transfer of any Equipment Note, the Owner
 Trustee and the Indenture Trustee shall deem and treat the Person in whose
 name any Equipment Note is registered on the Equipment Note Register as the
 absolute owner and holder of such Equipment Note for the purpose of
 receiving payment of all amounts payable with respect to such Equipment
 Note and for all other purposes, and neither the Owner Trustee nor 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 Note Holder, all payments to it shall be made to the account
 of such Note 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 Equipment Note (and such exclusion and withholding
 shall constitute payment in respect of such Equipment Note) 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 Equipment Notes, to withhold such
 amounts (and such withholding shall constitute payment in respect of such
 Equipment Note) and timely pay the same to the appropriate authority in the
 name of and on behalf of the Note 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 Note
 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 Note Holder may reasonably request from time to time. 

           If a Note 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 Equipment Note(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 Note Holder)
 to be withheld from payments hereunder or under the Equipment Notes held by
 such holder in respect of United States federal income tax (and such
 withholding shall constitute payment in respect of such Equipment Note). 
 If a Note 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 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
 Equipment Notes held by such holder, no amount shall be withheld from
 payments in respect of United States federal income tax.  If any Note
 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
 Equipment Notes held by such holder, the Indenture Trustee agrees to
 withhold from each payment due to the relevant Note 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 if the Indenture Trustee
 fails to withhold withholding taxes in accordance with this Section 2.04 or
 if any Note 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 Equipment Note, 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 Equipment Note
 (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 Equipment
 Note (or a portion thereof) then due thereunder (other than by reason of
 redemption);  

           Third:  to the payment of Make-Whole Amount, if any, and any
 other amount due hereunder or under such Equipment Note; and  

           Fourth:  the balance, if any, remaining thereafter, to the
 payment of the Principal Amount of such Equipment Note remaining unpaid and
 due by reason of redemption (provided that such Equipment Note 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 Equipment Note in
 the inverse order of their normal maturity. 

           SECTION 2.06.   Termination of Interest in Trust Indenture
 Estate. 

           A Note Holder and Indenture Indemnitees shall not, as such, have
 any further interest in, or other right with respect to, the Trust
 Indenture Estate when and if the Secured Obligations due to such Note
 Holder or Indenture Indemnitee shall have been paid in full. 

           SECTION 2.07.   Registration, Transfer and Exchange of Equipment
 Notes.

           The Indenture Trustee shall keep a register (the "Equipment Note
 Register") in which the Indenture Trustee shall provide for the
 registration of Equipment Notes and the registration of transfers of
 Equipment Notes. No such transfer shall be given effect unless and until
 registration hereunder shall have occurred.  The Equipment Note Register
 shall be kept at the Corporate Trust Office of the Indenture Trustee.  The
 Indenture Trustee is hereby appointed "Equipment Note Registrar" for the
 purpose of registering Equipment Notes and transfers of Equipment Notes as
 herein provided. A holder of any Equipment Note intending to exchange such
 Equipment Note shall surrender such Equipment Note 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 Equipment Note,
 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 Equipment Note, 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 Equipment Notes of a like
 aggregate Principal Amount and of the same series.  At the option of the
 Note Holder, Equipment Notes may be exchanged for other Equipment Notes of
 any authorized denominations of a like aggregate Principal Amount, upon
 surrender of the Equipment Notes to be exchanged to the Indenture Trustee
 at the Corporate Trust Office.  Whenever any Equipment Notes are so
 surrendered for exchange, the Owner Trustee shall execute, and the
 Indenture Trustee shall authenticate and deliver, the Equipment Notes which
 the Note Holder making the exchange is entitled to receive.  All Equipment
 Notes issued upon any registration of transfer or exchange of Equipment
 Notes (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 Equipment
 Notes surrendered upon such registration of transfer or exchange.  Every
 Equipment Note 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 Note 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 Equipment
 Note of the amount of all payments of Principal Amount previously made on
 the old Equipment Note or Equipment Notes with respect to which such new
 Equipment Note is issued and the date to which interest on such old
 Equipment Note or Equipment Notes has been paid.  Interest shall be deemed
 to have been paid on such new Equipment Note to the date on which interest
 shall have been paid on such old Equipment Note, and all payments of the
 Principal Amount marked on such new Equipment Note, as provided above,
 shall be deemed to have been made thereon.  The Owner Trustee shall not be
 required to exchange any surrendered Equipment Notes as provided above
 during the ten-day period preceding the due date of any payment on such
 Equipment Note.  The Owner Trustee shall in all cases deem the Person in
 whose name any Equipment Note shall have been issued and registered as the
 absolute owner and holder of such Equipment Note for the purpose of
 receiving payment of all amounts payable by the Owner Trustee with respect
 to such Equipment Note and for all purposes until a notice stating
 otherwise is received from the Indenture Trustee and such change is
 reflected on the Equipment Note Register.  The Indenture Trustee will
 promptly notify the Owner Trustee, the Owner Participant and Lessee of each
 registration of a transfer of a Equipment Note.  Any such transferee of a
 Equipment Note, by its acceptance of a Equipment Note, agrees to the
 provisions of the Participation Agreement applicable to Note Holders,
 including Sections 5, 7(a), 7(c), 7(g), 7(h), 7(i), 7(n), 7(q), 7(u) and
 7(z), 9, 12(a), 12(b), 14(b) and 14(e), 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 Note 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 Equipment Notes
 upon transfer or exchange within ten (10) Business Days of the date a
 Equipment Note is surrendered for transfer or exchange.  

           SECTION 2.08.   Mutilated, Destroyed, Lost or Stolen Equipment
 Notes.

           If any Equipment Note shall become mutilated, destroyed, lost or
 stolen, the Owner Trustee shall, upon the written request of the holder of
 such Equipment Note, execute and the Indenture Trustee shall authenticate
 and deliver in replacement thereof a new Equipment Note, payable in the
 same Principal Amount dated the same date and captioned as issued in
 connection with the Aircraft.  If the Equipment Note being replaced has
 become mutilated, such Equipment Note shall be surrendered to the Indenture
 Trustee and a photocopy thereof shall be furnished to the Owner Trustee. 
 If the Equipment Note being replaced has been destroyed, lost or stolen,
 the holder of such Equipment Note 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 Equipment Note 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 Equipment
 Note, 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 Equipment Note. Subject to
 compliance by the Note 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 Equipment Notes within ten (10) Business Days of the
 date of the written request therefor from the Note Holder.  

           SECTION 2.09.   Payment of Expenses on Transfer; Cancellation. 

           (a)  No service charge shall be made to a Note Holder for any
 registration of transfer or exchange of Equipment Notes, but the Indenture
 Trustee, as Equipment Note 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
 Equipment Notes.

           (b)  The Indenture Trustee shall cancel all Equipment Notes
 surrendered for replacement, redemption, transfer, exchange, payment or
 cancellation and shall destroy the canceled Equipment Notes. 

           SECTION 2.10.   Mandatory Redemptions of Equipment Notes.

           (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 Equipment Notes 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 Note Holders but without the Make-Whole Amount.

           (b)  If the Lease is terminated with respect to the Aircraft by
 Lessee pursuant to Section 9, Section 19(b) or Section 20 thereof and
 Lessee shall not have assumed all of the obligations of the Owner Trustee
 hereunder pursuant to Section 2.13 and Section 7(u) of the Participation
 Agreement, on the date the Lease is so terminated all the Equipment Notes
 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 Note Holders plus the Make-Whole Amount, if
 any.

           SECTION 2.11.   Voluntary Redemptions of Equipment Notes. 

           All, but not less than, all of the Equipment Notes may be
 redeemed by the Owner Trustee with the prior consent of Lessee upon at
 least 20 days revocable prior written notice to the Indenture Trustee, 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
 Note Holders plus the Make-Whole Amount, if any. 

           SECTION 2.12.   Redemptions; Notice of Redemption.

           (a)  Neither any redemption of any Equipment Note nor any
 purchase by the Owner Trustee of any Equipment Note may be made except to
 the extent and in the manner expressly permitted by this Trust Indenture. 
 No purchase of any Equipment Note may be made by the Indenture Trustee. 

           (b)  Notice of redemption or purchase with respect to the
 Equipment Notes 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 Note Holder of such Equipment
 Notes to be redeemed or purchased, at such Note Holder's address appearing
 in the Equipment Note Register; provided, that in the case of a redemption
 to be 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
 Equipment Notes 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 Equipment Note, and that, if any such
 Equipment Notes are then outstanding, interest on such Equipment Notes
 shall cease to accrue on and after such redemption date, and (4) the place
 or places where such Equipment Notes 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 Equipment Notes 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
 11:00 a.m. New York City time on the redemption date in immediately
 available funds the redemption price of the Equipment Notes 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 Equipment Notes 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 Equipment Notes then outstanding shall cease to bear interest. 
 Upon surrender of any such Equipment Note for redemption or purchase in
 accordance with said notice, such Equipment Note shall be redeemed at the
 redemption price.  If any Equipment Note 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
 Equipment Note as of such redemption date. 

           SECTION 2.13.   Assumption of Equipment Notes by Lessee. 

           If, in accordance with Section 7(u) of the Participation
 Agreement Lessee shall assume (on a full recourse basis) all of the
 obligations of the Owner Trustee hereunder, under the Equipment Notes 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 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 Equipment Notes and all other Operative Documents and the Owner
 Participant shall be released and 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 Equipment Notes. 

           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 Equipment
 Notes outstanding hereunder, and each Note 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 Equipment Notes and except against Liens on such Equipment Notes
 arising by, through or under such holder), all of the right, title and
 interest of such Note Holder in and to the Trust Indenture Estate, this
 Trust Indenture and the Equipment Notes 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 Equipment Notes may be exercised by
 the Owner Trustee or the Owner Participant at any time following the
 occurrence of any of the following events, and, in any such event, the
 purchase price thereof shall equal for each Equipment Note the aggregate
 unpaid Principal Amount thereof, plus accrued and unpaid interest thereon
 to, but not including, 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 Equipment Notes 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 one hundred eighty (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 Equipment Notes 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 (i) shall
 specify a date for such purchase not more than thirty (30) days or less
 than fifteen (15) days after the date of such notice and (ii) may specify
 that its election of such option is contingent upon the trustee or the
 debtor-in-possession in a proceeding involving Lessee under Chapter 11 of
 the Bankruptcy Code not entering into an agreement during the Section 1110
 Period to perform the Lease.  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 Equipment Notes shall become irrevocable (subject
 to the provision in clause (ii) of the first sentence of this paragraph)
 upon the fifteenth 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 Note Holders will comply with
 all the provisions of Section 2.07 to enable new Equipment Notes 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 Equipment Note shall be borne by
 the Owner Participant.  

           SECTION 2.15.   Subordination.

           (a)  The Owner Trustee and, by acceptance of its Equipment Notes
 of any Series, each Note 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 Note 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 Equipment Notes of any Series
 (other than Series A), each Note Holder of such Series agrees that in the
 event that such Note Holder, in its capacity as a Note 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 Note Holders of Series A until the Secured Obligations in
 respect of Series A Equipment Notes have been paid in full and (ii) after
 the Secured Obligations in respect of Series A Equipment Notes have been
 paid in full, the Note Holders of Series B until the Secured Obligations in
 respect of Series B Equipment Notes 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 3.02 and 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 Equipment Notes shall be distributed to the Note 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
 Equipment Note bears to the aggregate amount of the payments then due under
 all Series A Equipment Notes; (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 Equipment Notes shall be distributed to the Note 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
 Equipment Note bears to the aggregate amount of the payments then due under
 all Series B Equipment Notes; 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 Equipment Notes shall be distributed to the Note 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
 Equipment Note bears to the aggregate amount of the payments then due under
 all Series C Equipment Notes; and  

           Second, the balance, if any, of such installment remaining
 thereafter  shall be distributed to the Owner Trustee free and clear of the
 Lien of this Indenture; 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, 19(b) or 20 thereof, (iii) in connection with
 a refinancing of the Equipment Notes pursuant to Section 16 of the
 Participation Agreement or (iv) in connection with any optional redemption
 of the Equipment Notes effected in accordance with the Operative Documents
 shall be applied to redemption of the Equipment Notes, to payment of the
 Secured Obligations or to the Indenture Trustee or any Note Holder under
 the Participation Agreement by applying such funds in the following order
 of priority: 

           First, (i) to reimburse the Indenture Trustee and the Note
 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 (ii) to pay any other
 amounts then due to the Indenture Trustee and the Note Holders under this
 Trust Indenture, the Participation Agreement or the Equipment Notes; 

           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 Equipment Notes; (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 Equipment
 Notes; 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 Equipment Notes; 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 as permitted by  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
 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
 Equipment Notes 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, 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 Note Holders in the protection, exercise or
 enforcement of any right, power or remedy or any damages sustained by the
 Indenture Trustee or any Note Holder, liquidated or otherwise, upon such
 Event of Default shall be applied by the Indenture Trustee as between
 itself and the Note Holders in reimbursement of such expenses and any other
 expenses for which the Indenture Trustee or the Note Holders are entitled
 to reimbursement under any Operative Document and all amounts payable to
 the other Indenture Indemnitees hereunder and under the Participation
 Agreement and the Lease excluding those amounts described in clauses Second
 and Third below, 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 Note 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 Note
 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 Note 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 Equipment Notes, and the accrued but unpaid interest and other
 amounts due thereon and all other Secured Obligations in respect of the
 Series A Equipment Notes to the date of distribution, shall be distributed
 to the Note 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 Equipment Notes 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 Equipment Notes 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
 Equipment Notes, and the accrued but unpaid interest and other amounts due
 thereon and all other Secured Obligations in respect of the Series B
 Equipment Notes to the date of distribution, shall be distributed to the
 Note 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 Equipment Notes 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 Equipment Notes 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 Equipment Notes, and the accrued but unpaid interest and other amounts
 due thereon and all other Secured Obligations in respect of the Series C
 Equipment Notes to the date of distribution, shall be distributed to the
 Note 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 Equipment Notes 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 Equipment Notes 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 free and
 clear of the Lien of this Indenture.   

           No Make-Whole Amount shall be due and payable on the Equipment
 Notes as a consequence of the acceleration of the Equipment Notes.  

           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 or any
 other Indenture Indemnitees, (ii) any Note Holder, (iii) the Subordination
 Agent, (iv) the Liquidity Provider, and (v) the Pass Through Trustees, in
 each case whether pursuant to Section 6 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.

           (c)  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.

           (d)  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 Note 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 Note 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 Note 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 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
 "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.  


                                 ARTICLE IV
                   COVENANTS OF OWNER TRUSTEE; EVENTS OF 
                   DEFAULT; REMEDIES OF INDENTURE TRUSTEE 

           SECTION 4.01.   Covenants of Owner Trustee.

           The Owner Trustee hereby covenants and agrees 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 Equipment Notes and hereunder in accordance with the terms of the
 Equipment Notes and this Trust Indenture and all amounts, if any, payable
 by it to the Note Holders under the Participation Agreement; 

           (b)  [Reserved]

           (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 Note 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 received pursuant to Section 9(a) of the Lease, a
 copy of each notice delivered pursuant to Section 10, 19 or 20 of the Lease
 and a copy of each report or notice received pursuant to Section 11(c) of
 the Lease to the extent that the same shall not be required to 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 Equipment Note or hereunder (other than
 any such failure arising 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 Note Holder; or

           (c)  any Lien required to be discharged by the Owner Trustee in
 its individual or trust capacity pursuant to Section 7(f) of the
 Participation Agreement, or by the Owner Participant pursuant to Section
 7(f) 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 Note Holder
 of such Lien; or

           (d)  any representation or warranty made by the Owner Participant
 or the Owner Trustee herein, in the Participation Agreement or in any
 certificate furnished by the Owner Participant or the Owner Trustee to the
 Indenture Trustee or any Note 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 adverse to the interests of the Indenture Trustee or the Note Holders;
 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 7(a) of
 the Participation Agreement as to the citizenship of the Owner Trustee in
 its individual capacity [or of the Owner Participant, respectively,](4)  as
 soon as is reasonably practicable but in any event within sixty (60) days
 following notice thereof from the Indenture Trustee or any Note Holder to
 the Owner Trustee or the Owner Participant, as the case may be; or
 ---------------
 (4)    Delete for foreign OP.

           (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 Note
 Holders contained in the Participation Agreement, Section 4.01(a) of the
 Trust Agreement, the Equipment Notes 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 Transportation Code, 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 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 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 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,
 judgement 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 Note 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
 Note 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 (subject to the notice
 provision set forth in Section 4.04(a)) 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; provided, however, that in the event
 the Indenture Trustee shall have validly terminated the Lease (or, in the
 event of a reorganization proceeding involving Lessee instituted under
 Chapter 11 of the Bankruptcy Code, such Lease is rejected), the Indenture
 Trustee shall not, without the consent of the Owner Participant, sell or
 lease, or otherwise afford the use of, the Aircraft or any portion thereof
 to Lessee or any Affiliate thereof.  Without limiting the generality of the
 foregoing, the Indenture Trustee shall give the Owner Trustee, the Owner
 Participant and Lessee at least ten (10) Business Days prior written notice
 (which may be given concurrently with notice of the Enforcement Date) of
 any declaration of the Lease to be in default pursuant to Sections 14 and
 15 of the Lease or any termination 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 Equipment Note 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 Equipment Notes, and, unless the Owner Trustee has cured
 Events of Default in respect of payments of Basic Rent on each of the three
 (3) immediately preceding Basic Rent payment dates, or the Owner Trustee
 has cured six (6) 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 by the payment of money has
 occurred, the Owner Trustee or the Owner Participant may, but shall not be
 obligated to, cure such Event of Default by making such payment 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 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 Note 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 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 Equipment Notes shall
 have become due and payable pursuant to Section 4.04(b) hereof (and such
 acceleration shall not have been rescinded pursuant to Section 4.04(b)),
 such subrogation shall, until the Principal Amount of, interest on, Make-
 Whole Amount, if any, and all other amounts due with respect to all
 Equipment Notes shall have been paid in full, be subordinate to the rights
 of the Indenture Trustee, the Indenture Indemnitees and the Note 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 (x) in the case of a sale of the Aircraft, the
 Indenture Trustee shall give the Owner Trustee and the Owner Participant,
 subsequent to the earlier of (I) the expiration of the Section 1110 Period
 (as hereinafter defined) and (II) Lessee's rejection of the Lease in a
 proceeding instituted under Chapter 11 of the Bankruptcy Code, twenty (20)
 days prior written notice of its intention to sell the Aircraft and (y) in
 the case of any judicial proceeding to foreclose the Lien of the Indenture,
 fifteen (15) days prior written notice of its intention to initiate such
 proceeding and, provided, further, that in the event the Indenture Trustee
 shall have validly terminated the Lease (or, in the event of a
 reorganization proceeding involving Lessee instituted under Chapter 11 of
 the Bankruptcy Code, such Lease is rejected), the Indenture Trustee shall
 not, without the consent of the Owner Participant, sell or lease, or
 otherwise afford the use of, the Aircraft or any portion thereof to Lessee
 or any affiliate thereof.  Unless an Event of Default not resulting from or
 relating to a Lease Event of Default has occurred and is continuing, the
 Owner Participant may bid at any public sale and become the purchaser. 
 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 (i) accelerated the maturity of the Equipment
 Notes and (ii) exercised or concurrently be exercising one or more of the
 remedies provided for in Section 15 of the Lease to terminate the Lease (in
 the event that it is not commercially reasonable to take possession of the
 Aircraft) or take possession and/or sell the Aircraft; provided, 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 sixty (60) days subsequent
 to the entry of an order for relief 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 Lessee
 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, both
 the Indenture Trustee and the Owner Trustee shall have the right 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 Note 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 Equipment Notes to be due and payable,
 whereupon the unpaid Principal Amount of all Equipment Notes 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; provided that if an Event of Default referred
 to in clause (g) of Section 4.02 hereof shall have occurred and be
 continuing or a Lease Event of Default under Section 14(e) of the Lease
 shall have occurred and be continuing, then and in every such case the
 unpaid Principal Amount then outstanding, together with accrued but unpaid
 interest and all other amounts due thereunder and hereunder shall
 immediately and without further act become due and payable without
 presentment, demand, protest or notice, all of which are hereby waived;
 provided further that in the event of a reorganization proceeding involving
 Lessee instituted under Chapter 11 of the Bankruptcy Code, if no other
 Lease Event of Default and no other Event of Default (other than the
 failure to pay the Principal Amount of the Equipment Notes which by such
 declaration have become payable) exists at any time after the consummation
 of such proceeding, such declaration shall be automatically rescinded
 without any further action on the part of any Note Holder.

                This Section 4.04(b), however, is subject to the condition
 that, if at any time after the Principal Amount of the Equipment Notes
 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 Equipment Notes and all other amounts
 payable under the Equipment Notes (except the Principal Amount of the
 Equipment Notes 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 Note
 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. 

           Any acceleration pursuant to this Section 4.04(b) shall be
 automatically rescinded and any related declaration of an Event of Default
 annulled in the event that the Owner Trustee shall have cured, in
 accordance with Section 4.03 hereof, the Event of Default that resulted in
 such acceleration or declaration. 

           (c)  Any Note 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 Note 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 Note 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 Equipment Notes 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 Note 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 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 and unless the Owner
 Trustee or the Owner Participant shall have elected to purchase the
 Equipment Notes, at the request of the Indenture Trustee, the Owner Trustee
 shall promptly execute and deliver to the Indenture Trustee such
 instruments 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.

           (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
 other than Excluded Payments.  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, 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 Note
 Holders, and subject to Section 5.02 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 Note 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 Equipment Note 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 Note Holder. 

           SECTION 4.09.   Appointment of Receiver. 

           If an Event of Default shall have occurred and be continuing, 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 in accordance with applicable
 law 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 Note Holders to Receive Payment. 

           Notwithstanding any other provision of this Trust Indenture, the
 right of any Note Holder to receive payment of principal of, and premium,
 if any, and interest on a Equipment Note on or after the respective due
 dates expressed in such Equipment Note, 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 Note 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 Note Holder.  Subject to
 the terms of Sections 2.14, 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 Note 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 Note 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 Note 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 Note
 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 Note 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) and
 (b), 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 Note 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 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 Note 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, 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 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 of such amounts
      included in Excluded Payments or performance by Lessee of such
      insurance covenant, or to recover damages for the breach thereof or
      for specific performance of any covenant of Lessee; 

                   (2) the Indenture Trustee shall not, without the consent
      of the Owner Trustee and the Owner Participant, 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 any other
      Operative Document, 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; 

                   (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, (ii) to exercise inspection rights pursuant to
      Section 12 of the Lease and (iii) to give notices of default under
      Section 14 of the Lease;  

                   (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 (i)
      adjust upwards Rent, EBO Amount and Termination Values as provided in
      Section 3(c) of the Lease, (ii) to extend the Term, (iii) to retain
      all rights with respect to insurance maintained for its own account
      which Section 11(b) 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 22 of the Lease  and (v) to select counsel with
      respect to any opinion relating to tax matters to be delivered solely
      to the Owner Participant; 

                   (5)  so long as no Indenture Trustee Event has occurred
      and is continuing, the Owner Trustee shall have the right, to the
      exclusion of the Indenture Trustee, to adjust EBO Amounts and
      Termination Values as provided in Section 3(c) of the Lease or to
      adjust downward any installment or amount of Basic Rent, EBO Amount or
      Termination Value, as such installments and amounts are set forth in
      Exhibits B, C and D, respectively, to the Lease, to the extent of the
      portion of such installment or amount that would, under Section 3.01,
      3.02 or 3.03 hereof, as the case may be, be distributable to the Owner
      Trustee or the Owner Participant; 

                   (6)  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(b) of the Lease; and 

                   (7)  so long as no Indenture Trustee Event shall have
      occurred and be continuing, except as provided in clauses (2) and (3)
      above, all other 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 (A) limit any rights separately granted to the
      Indenture Trustee under the Operative Documents, (B) limit 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 or confer upon the Owner Trustee the
      right to adversely affect the validity or enforceability of the Lien
      of this Indenture by depriving the Note Holders or other Indenture
      Indemnitees of the benefit thereof or (C) confer on the Owner Trustee
      the right to agree to any amendment or supplement to the Lease except
      in accordance with Article IX. 

           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 (b) 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 7(d)
 of the Participation Agreement or as may be specified from time to time in
 written instructions of a Majority in Interest of Note 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 Note 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
 and a copy of each report or notice received pursuant to Sections 9(a) and
 11(c) of the Lease, respectively, to the extent that the same shall not
 have been furnished to such Note 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 Note Holders, the Indenture Trustee
 shall declare the Lease to be in default pursuant to Section 15 thereof and
 exercise those remedies specified by such Note Holders.  The Indenture
 Trustee agrees to provide to the Note 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 required to take any action or
 refrain from taking any action under Section 5.01 (other than the first
 sentence thereof), 5.02 or Article IV hereof unless the Indenture Trustee
 shall have been indemnified to its reasonable satisfaction against any
 liability, cost or expense (including counsel fees) which may be incurred
 in connection therewith pursuant to a written agreement with one or more
 Note Holders.  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 Note 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 Note 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. 

           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, if no Lease Event of Default is continuing, 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 the Indenture Trustee of a
 written request from the Owner Trustee, requesting such release and
 specifically describing the Airframe and/or Engine(s) so to be released.   

           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 Note 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. 

           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 21
 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 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 6.03 hereof (or in any certificate
 furnished to the Indenture Trustee or any Note 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. 

           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, 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 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 Equipment
 Notes, the Lease, the Purchase Agreement, the Purchase Agreement
 Assignment, or the Consent and Agreement, 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
 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 Note 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 Note
 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 as
 specifically provided in 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 has occurred and is continuing
 (or in the absence of such direction, by the Majority In Interest of Note
 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 Equipment Notes
 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 not be liable for
 anything done, suffered or omitted in good faith by them in accordance with
 the advice or 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 Note 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 Note 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 Note 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 INDENTURE TRUSTEE BY 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
 or 2.04(b) 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 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.  Notwithstanding any provision to the contrary
 herein, the scope of the Owner Trustee's indemnity obligations under this
 Section 7.01 shall not exceed the scope of the indemnity obligations of
 Lessee under the Participation Agreement and the Lease; and the Indenture
 Trustee agrees that, prior to seeking indemnification from the Trust
 Indenture Estate, it will demand, and take such action as it may 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 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 6(b) and 6(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.  The Owner Trustee shall be subrogated to the
 Indenture Trustee's rights, if any, to payment from Lessee for amounts paid
 by the Owner Trustee under this Section 7.01. 


                                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 Note 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 Note Holder, such
 resignation to be effective upon the acceptance of the trusteeship by a
 successor Indenture Trustee.  In addition, a Majority in Interest of Note
 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 Default shall have occurred and be
 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
 Note 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 Note 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 Note 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
 United States 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.

           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
 Equipment Notes 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 Note 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 Note 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 Note 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 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 Note 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 Note Holders, or in the event
 that the Indenture Trustee shall have been requested to do so in writing by
 a Majority in Interest of Note 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
             SUPPLEMENTS AND AMENDMENTS TO THIS TRUST INDENTURE
                            AND OTHER DOCUMENTS  

           SECTION 9.01.   Instructions of Majority; Limitations.

           (a)  Except as expressly 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 (to the extent assigned in the Purchase Agreement Assignment),
 the Purchase Agreement Assignment, the Consent and Agreement, or execute
 and deliver any written waiver or modification of, or consent under, the
 terms of the Lease, the Purchase Agreement (to the extent assigned in the
 Purchase Agreement Assignment), the Purchase Agreement Assignment, the
 Consent and Agreement, unless such supplement, amendment, waiver,
 modification or consent is consented to in writing by the Indenture Trustee
 and a Majority in Interest of Note Holders.  Anything to the contrary
 contained herein notwithstanding, without the necessity of the consent of
 any of the Note 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, Section 19 or Section 20 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 (except to the
 extent expressly permitted by Section 5.02) until after the payment in full
 of all Secured Obligations or otherwise adversely affect the Note Holders. 

           (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 Note 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 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 Note Holders, or does not adversely effect the Note Holders,
 but upon the written request of a Majority in Interest of Note 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 Equipment Note then outstanding and each
 Liquidity Provider, no such amendment of or supplement to this Trust
 Indenture, the Lease, the Purchase Agreement, the Purchase Agreement
 Assignment, the Consent and Agreement 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 Note Holders", "Make-Whole
 Amount" or "Note Holder", or the percentage of Note 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
 Equipment Note, 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 Note Holders, the Owner Trustee and Lessee,
 (iii) reduce, modify or amend any indemnities in favor of the Note Holders,
 (iv) consent to any change in the Trust Indenture or the Lease which would
 permit redemption of Equipment Notes earlier than permitted under Section
 2.10 or 2.11 hereof or the purchase of the Equipment Notes other than as
 permitted by Section 2.14 hereof, (v) modify any of the provisions of
 Section 3(c)(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, EBO Amount 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 19 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 Note 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.  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 Note Holder for any of the following purposes:
 (i) (a) to cure any defect or inconsistency herein or in the Equipment
 Notes, or to make any change not inconsistent with the provisions hereof
 (provided that such change does not adversely affect the interests of any
 Note Holder in its capacity solely as Note 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 Note Holders in its
 capacity solely as Note 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 Note 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 Note Holders; and (vii) to include on the
 Equipment Notes 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 Note 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 Note Holder at its address
 last set forth in the Equipment Note 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 Note
 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. 


                                  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 Equipment Notes and provided that there shall then be no
 other Secured Obligations due to the Note Holders, the Indenture
 Indemnitees 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 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 Note
 Holders. 

           No holder of a Equipment Note shall have legal title to any part
 of the Trust Indenture Estate.  No transfer, by operation of law or
 otherwise, of any Equipment Note or other right, title and interest of any
 Note 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 Note 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. 

           SECTION 10.04.  Trust Indenture for Benefit of Owner Trustee,
 Indenture Trustee, Owner Participant, Lessee, Note Holders and the Other
 Indenture Indemnitees. 

           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, the Indenture Indemnitees
 and the Note 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 Two
 International Place, 4th Floor, Boston, Massachusetts 02110, Attention:
 Corporate Trust Department (Telecopy No. (617) 664-5371), (iii) if to any
 Participant, Lessee or any Note 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 Equipment Note Register.  Whenever
 any notice in writing is required to be given by the Owner Trustee, any
 Participant or the Indenture Trustee or any Note 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 Equipment
 Notes 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 Equipment Note shall be effective only in the specific
 instance and for the specific purpose given. 

           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 Note 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 Note
 Holder by its acceptance of a Equipment Note agrees to be bound by this
 Trust Indenture and all provisions of the Participation Agreement
 applicable to a Loan Participant or a Note 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 HAS BEEN DELIVERED IN NEW YORK, NEW YORK AND
 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 Note Holders. 

           All votes of the Note Holders shall be governed by a vote of a
 Majority in Interest of Note Holders, except as otherwise provided herein. 

           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, the Indenture Trustee will not 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.

           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 


                              By:_______________________________________
                              Name: 
                              Title: 


                              STATE STREET BANK AND TRUST COMPANY, as
                              Indenture Trustee 


                              By:_______________________________________
                              Name: 
                              Title:





                                 EXHIBIT A 
                                     TO 
                       TRUST INDENTURE AND MORTGAGE  


                  TRUST AGREEMENT AND INDENTURE SUPPLEMENT 
                   (US Airways, Inc.  Trust No.  N7__UW) 

           This TRUST AGREEMENT AND INDENTURE SUPPLEMENT (US Airways, Inc.
 Trust No.  N7__UW) 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 (US Airways, Inc. Trust
 No. N7__UW) dated as of ____________  __, 199_ (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 (US Airways,
 Inc.  Trust No.  N7__UW) dated as of _________ __, 199_  (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 Owner Trustee'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         Number           Serial Number
    ------------      ------------     ----------------     --------------
       Airbus             A319


 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's 
     Manufacturer        Model Number        Serial Number
     ------------       --------------       -------------


 together with all of 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 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 Note Holders, in the 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 Note Holders, except as
 provided in Section 2.15 and Article III of the Trust Indenture without any
 preference, distinction or priority of any one Equipment Note 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.

           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 


                              By:________________________________________
                              Name: 
                              Title:




                                 SCHEDULE I 


             Principal      Amount      Interest Rate      Maturity
             ---------      -------     -------------      --------
 Series A                                        %
 Series B                                        %
 Series C                                        %



                        Equipment Notes Amortization 


                                  SERIES A 

                              Aircraft: _____ 





                                  SERIES B 

                              Aircraft: _____ 




                                  SERIES C 

                              Aircraft: _____ 





                                SCHEDULE II 

      PASS THROUGH TRUST AGREEMENT AND PASS THROUGH TRUST SUPPLEMENTS 


 Pass Through Trust Agreement, dated as of December 4, 1998, between US
 Airways, inc. and State Street Bank and Trust Company, as supplemented by
 Trust Supplement No. 1998-1A, dated as of December 14, 1998, as
 supplemented by Trust Supplement No. 1998-1B, dated as of December 14,
 1998, and as supplemented by Trust Supplement No. 1998-1C, dated as of
 December 14, 1998. 





EXHIBIT 4(a)(xvi)
                                                         Doc.  No.  2.23 
                                                                  N7__UW

  
  
                          PURCHASE AGREEMENT ASSIGNMENT
                       (US Airways, Inc. Trust No. N7__UW)  
  
  
           PURCHASE AGREEMENT ASSIGNMENT (US Airways, Inc. Trust No.
 N7__UW), dated as of _____________ __, 1998, between US AIRWAYS, INC., a
 Delaware corporation (the "Assignor" or "Lessee"), and FIRST SECURITY BANK,
 NATIONAL ASSOCIATION, not in its individual capacity but solely as Owner
 Trustee ("FSB" or "Lessor") under the Trust Agreement (US Airways, Inc.
 Trust No. N7__UW), dated as of _____________ __, 1998, (as amended,
 modified or supplemented from time to time, the "Trust Agreement"), between
 ____________________ (the "Owner Participant") and FSB. 
  
                               W I T N E S S E T H
  
           WHEREAS, US Airways Group, Inc.  ("Parent") and AVSA (as
 hereinafter defined) are parties to the Purchase Agreement (as hereinafter
 defined), providing, among other things, for the delivery by AVSA to the
 Assignor of certain aircraft, including the Aircraft (as hereinafter
 defined) covered by the Participation Agreement (as hereinafter defined);
 and 
  
           WHEREAS, pursuant to a Purchase Agreement Assignment, dated as of
 [October 1, 1998], by and between Parent and Lessee (the "Parent
 Assignment"), Parent assigned all of its right, title in and interest in
 and to the Purchase Agreement to Assignor to the extent such right, title
 and interest relate to certain aircraft, including the Aircraft covered by
 the Participation Agreement; 
  
           WHEREAS, pursuant to a Consent and Agreement of AVSA and
 Guarantor (as hereinafter defined), dated as of [October 1, 1998] (the
 "Parent Consent and Agreement"), AVSA and Guarantor consented to the
 assignment by Parent to Assignor of Parent's right, title in and interest
 in and to the Purchase Agreement as provided for in the Parent Assignment; 
  
           WHEREAS, pursuant to the Parent Consent and Agreement, Guarantor
 confirmed that its guarantee given in the Consent and Guaranty (as
 hereinafter defined) remains in full force and effect and, to the extent
 the same relates to the aircraft assigned to Lessee pursuant to the Parent
 Assignment, it inures to the benefit of the Assignor;  
  
           WHEREAS, pursuant to the Consent and Guaranty, the Guarantor has
 agreed, among other things, to unconditionally guarantee the due and
 punctual performance by AVSA of all of its liabilities and obligations as
 set forth in the Purchase Agreement; and 
  
           WHEREAS, pursuant to the Lease (as hereinafter defined), the
 Lessor will lease the Aircraft to the Assignor; and 
  
           WHEREAS, on the terms and conditions hereof and of the Consents
 and Agreements (as hereinafter defined), (a) the Assignor desires to assign
 to the Lessor certain of the Assignor's remaining rights, title and
 interests in, to and under the Purchase Agreement and the Consent and
 Guaranty (insofar as they relate to the Purchase Agreement and the
 Aircraft) and (b) the Lessor desires to accept the assignments and, except
 as otherwise provided herein, to assume the obligations of the "Buyer"
 under the Purchase Agreement, to the extent assigned to it pursuant hereto;
 and  

           WHEREAS, pursuant to the Indenture (as hereinafter defined), the
 Lessor will assign, inter alia, its rights hereunder to the Indenture
 Trustee (as hereinafter defined) to the extent set forth therein; and  
  
           WHEREAS, such assignments and acceptances are intended to permit
 consummation of the transactions contemplated by the Participation
 Agreement; and 
  
           WHEREAS, AVSA and the Guarantor are willing to execute and
 deliver their respective Consents and Agreements; 
  
           NOW, THEREFORE, in consideration of the mutual covenants herein
 contained, the parties hereto agree as follows: 
  
           1.   Defined Terms.  For all purposes of this Assignment, except
 as otherwise expressly provided or unless the context otherwise requires,
 the following terms shall have the following meanings: 
  
           "Aircraft" shall mean the Airbus A319 aircraft, bearing
 manufacturer's serial number ___, delivered under the Purchase Agreement,
 including the two CFM International Model 56-5 engines installed on such
 aircraft on the date of delivery thereof pursuant to the Purchase Agreement
 or such other engines as may be substituted therefore under the Lease. 
  
           "AVSA" shall mean AVSA, S.A.R.L., a French societe a     
 responsabilite limitee, and its successors and assigns.  
  
           "AVSA Consent and Agreement" shall mean the Consent and Agreement
 of AVSA attached hereto, as amended, modified or supplemented from time to
 time. 
  
           "Consent and Guaranty" shall mean the Consent and Guaranty of the
 Guarantor attached to the Purchase Agreement, together with all amendments,
 waivers, and consents heretofore entered into or heretofore granted
 thereunder. 
  
           "Consents and Agreements" shall mean the AVSA Consent and
 Agreement and the Guarantor Consent and Agreement. 
  
           "Equipment Notes" shall have the meaning ascribed thereto in the
 Participation Agreement. 
  
           "Guarantor" shall mean Airbus Industrie G.I.E., a French
 groupement d'interet economique, and its successors and assigns.  
  
           "Guarantor Consent and Agreement" shall mean the Consent and
 Agreement of the Guarantor attached hereto, as amended, modified or
 supplemented from time to time. 
  
           "Indenture" shall mean the Trust Indenture and Security Agreement
 (US Airways, Inc. Trust No. N7__UW), dated as of _____________ __, 1998,
 between the Lessor and the Indenture Trustee, as amended, modified or
 supplemented from time to time.  
  
           "Indenture Trustee" shall mean State Street Bank and Trust
 Company, a Massachusetts trust company, not in its individual capacity but
 solely as Indenture Trustee under the Indenture and each other person which
 may from time to time be acting as successor trustee under the Indenture.  

           "Lease" shall mean the Lease Agreement (US Airways, Inc. Trust
 No. N7__UW), dated as of _____________ __, 1998, between the Lessor and the
 Assignor, as amended, modified or supplemented from time to time. 
  
           "Participation Agreement" shall mean the Participation Agreement
 (US Airways, Inc. Trust No. N7__UW), dated as of _____________ __, 1998,
 among the Assignor, the Owner Participant, the Pass Through Trustee (as
 defined therein), the Lessor, the Indenture Trustee and the Subordination
 Agent (as defined therein), as amended, modified or supplemented from time
 to time. 
  
           "Purchase Agreement" shall mean the Airbus A319/A320/A321
 Purchase Agreement, dated as of October 31, 1997, between US Airways Group,
 Inc. and AVSA, together with all exhibits, appendices and letter agreements
 thereto and all amendments, waivers and consents granted thereunder. 
  
           All other terms used herein in capitalized form that are defined
 in the Lease shall, when used herein, have the meanings specified in the
 Lease.  
  
           2.   Assignment.  (a)  Generally.  The Assignor has sold,
 assigned, transferred and set over and does hereby sell, assign, transfer
 and set over unto the Lessor (i) all of the Assignor's right, title and
 interest in and to (x) the warranty and service life policy set forth in
 Clause 12 of the Purchase Agreement (the "Assigned Warranties") and (y) the
 Consent and Guaranty (insofar as such Consent and Guaranty relates to the
 Assigned Warranties), as and to the extent that the same relates to the
 Aircraft, except to the extent reserved below, including, without
 limitation, in such assignment to the Lessor (A) all claims for damages in
 respect of such Aircraft arising as a result of any default by AVSA under
 Clause 12 of the Purchase Agreement, including, without limitation, all
 warranty, service life policy and indemnity provisions contained in Clause
 12 of  the Purchase Agreement in respect of the Aircraft and all claims
 thereunder and under the Consent and Guaranty in respect of the Aircraft
 and (B) any and all rights of the Assignor to compel performance of the
 terms of Clause 12 of the Purchase Agreement and the Consent and Guaranty
 in respect of the Aircraft; reserving to the Assignor, however, all the
 Assignor's rights and interests in and to Clause 12 of the Purchase
 Agreement and the Consent and Guaranty as and to the extent that Clause 12
 of the Purchase Agreement and the Consent and Guaranty relate to aircraft
 other than the Aircraft and to the extent that the Purchase Agreement and
 the Consent and Guaranty relate to any other matters not directly
 pertaining to the Aircraft. 
  
           (b)  Assignment of Rights.  If and so long as there shall not
 exist and be continuing an Event of Default and, if an Event of Default is
 continuing, so long as Lessee or any Sublessee remains in possession of the
 Aircraft, the Lessor hereby authorizes the Lessee, to the exclusion of the
 Lessor, to exercise in the Lessee's name all rights and powers related to
 the Assigned Warranties and to retain any recovery or benefit resulting
 from the enforcement of any of the Assigned Warranties in respect of the
 Aircraft, except that the Lessee may not enter into any change order or
 other amendment, modification or supplement to the Purchase Agreement
 without the written consent or countersignature of the Lessor if such
 change order, amendment, modification or supplement would result in any
 rescission, cancellation or termination of the Assigned Warranties in
 respect of the Aircraft or in any way limit the rights assigned hereunder. 
  
           (c)  Acceptance of Assignment.  Subject to the terms hereof, the
 Lessor accepts the assignment contained in this Section 2. 
             (d)  Onward Transfer of Rights.  Except as provided in Clause 8
 hereunder, the Lessor agrees that it may not sell, assign or otherwise
 transfer any of the Assigned Warranties without the prior written consent
 of AVSA. 
  
           (e)     Requirement of Notice to AVSA.  For all purposes of this
 Assignment, AVSA shall not be deemed to have knowledge of and need not
 recognize any Event of Default, unless and until AVSA shall have received
 written notice thereof from the Lessor 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 and this Assignment,
 AVSA may act with acquittance and conclusively rely upon any such notice. 
  
           3.   Certain Rights and Obligations of the Parties.  (a) Assignor
 Remains Liable.  It is expressly agreed that, anything herein contained to
 the contrary notwithstanding:  (a) the Assignor shall at all times remain
 liable to AVSA under the Purchase Agreement to perform all the duties and
 obligations of the "Buyer" thereunder to the same extent as if this
 Assignment had not been executed; (b) the exercise by the Lessor of any of
 the rights assigned hereunder shall not release the Assignor from any of
 its duties or obligations to AVSA under the Purchase Agreement except to
 the extent that such exercise by the Lessor shall constitute performance of
 such duties and obligations; and (c) except as provided in the next
 succeeding paragraph, none of the Lessor, the Indenture Trustee nor any
 Participant 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 the Assignor under the
 Purchase Agreement or to make any payment or to make any inquiry as to the
 sufficiency of any payment received by any of them or to present or file
 any claim or to take any other action to collect or enforce any claim for
 any payment assigned hereunder.
  
           (b)    Lessor Bound by Purchase Agreement.  Without in any way
 releasing the Assignor from any of its duties or obligations under the
 Purchase Agreement, the Lessor confirms for the benefit of AVSA that,
 insofar as the provisions of the Purchase Agreement relate to the Aircraft,
 in exercising any rights under the Purchase Agreement, 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, the terms and
 conditions of the Purchase Agreement disclosed to the Lessor in writing
 shall apply to, and be binding upon, the Lessor to the extent of its
 respective interests assigned hereunder to the same extent as the Assignor. 
  
           (c)     Limit of Effect of this Assignment.  Nothing contained
 herein shall (i) subject AVSA or the Guarantor to any liability to which it
 would not otherwise be subject under the Purchase Agreement or (ii) modify
 in any respect the contractual rights of AVSA or the Guarantor thereunder
 (except, in each case, as provided in the attached Consents and
 Agreements).  
  
           (d)  Appointment as Attorney-in-Fact.  The Assignor does hereby
 constitute, effective at any time after an Event of Default shall have
 occurred and be continuing, the Lessor and its successors and permitted
 assigns to be the Assignor's true and lawful attorney, irrevocably, with
 full power (in the name of the Assignor or otherwise) to ask, require,
 demand, receive, 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 and the Consent and Guaranty in respect of the Aircraft,
 to the extent that the same have been assigned as provided in this
 Assignment and, for such period as the Lessor, its successors and assigns may 
exercise rights with respect thereto under this Assignment, 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 Lessor, its successors and assigns, may deem
 to be necessary or advisable in the premises. 
  
           4.   Further Assurances.  The Assignor and the Lessor each agree
 that, at any time and from time to time, upon the written request of any
 other party hereto, it will promptly and duly execute and deliver any and
 all such further instruments and documents and take such further action as
 the other may reasonably request in order to obtain the full benefits of
 this Assignment and of the rights and powers herein granted.
  
           5.   No Amendment of Purchase Agreement.  So long as the Lease is
 in effect, the Lessor agrees that it shall not enter into any agreement
 that would amend, modify, supplement, rescind, cancel or terminate the
 Purchase Agreement or the Consent and Guaranty in any respect or in any way
 limit the rights of the Assignor or any of the other rights assigned
 hereunder (except as set forth above when there has been an Event of
 Default), without the prior written consent of the Assignor.
  
           6.   Execution of Assignment.  This Assignment is executed by the
 Assignor and the Lessor concurrently with the execution and delivery of the
 Participation Agreement and the Lease.
  
           7.   Confidentiality.  The Lessor agrees that it will not
 disclose to any third party the terms of the Purchase Agreement or this
 Assignment, except (a) as required by applicable law or governmental
 regulation, (b) as contemplated in the Lease or the Participation Agreement
 (including as set forth in Section 7(o) of the Participation Agreement) or
 (c) with the consent of the Assignor, the Guarantor and AVSA.
  
           8.   Assignment as Collateral.  Each party hereto consents to the
 assignment and pledge by the Lessor to the Indenture Trustee, as security
 for the Equipment Notes to be issued under the Indenture and the other
 obligations secured thereby as specified in the Indenture, of all of the
 Lessor's right, title and interest in and to the Purchase Agreement and the
 Consent and Guaranty under this Assignment which assignment shall be on
 terms identical to this Assignment.
  
           9.   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 such counterparts shall together
 constitute but one and the same instrument.
  
           10.  GOVERNING LAW.  THIS ASSIGNMENT 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. 
  
           11.  Successors and Assigns.  This Assignment shall be binding
 upon and shall inure to the benefit of the parties hereto and their
 respective successors and permitted assigns.
  
           12.  Notices.  All notices with respect to the matters contained
 herein shall be delivered (notices with respect to AVSA shall be sent to
 the address for AVSA set forth in Section 2(d)) in the manner provided in
 Section 12(a) of the Participation Agreement.  
           13.  No Oral Amendments.  Neither this Assignment nor any of the
 terms hereof may be terminated, amended, supplemented, waived or modified
 orally, but only by an instrument in writing signed by the party against
 whom the enforcement of such termination, amendment, supplement, waiver or
 modification is sought.
  
  
                          *     *     *     *    *
           IN WITNESS WHEREOF, the parties hereto have caused this
 Assignment to be duly executed as of the day and year first above written.  
  
  
                          US AIRWAYS, INC. 
  
  
  
                          By:   _________________________________  
                          Name:    
                          Title:   
  
  
                          FIRST SECURITY BANK, NATIONAL ASSOCIATION, 
                          not in its individual capacity but solely 
                          as Lessor 
  
  
                          By:  ________________________________  
                          Name:    
                          Title:   


                     AIRBUS INDUSTRIE CONSENT AND AGREEMENT
  
           The undersigned, Airbus Industrie G.I.E., a groupement d'interet
 economique established under Ordonnance No. 67-821 dated September 23, 1967
 of the Republic of France (the "Guarantor"), hereby acknowledges notice of
 and consents to all of the terms of the Purchase Agreement Assignment
 between US Airways, Inc., a Delaware corporation, and First Security Bank,
 National Association, not in its individual capacity, but solely as Lessor,
 with respect to US Airways, Inc. Trust No. N7___UW, dated as of 
 ______________  (hereinafter called the "Assignment", the defined terms
 therein being hereinafter used with the same meaning), and to the
 assignment of the Assigned Warranties to the Indenture Trustee under the
 Indenture, dated as of ______________, between ___________ and ____________
 (hereinafter called the "Indenture"), and hereby confirms to the Assignor
 and the Lessor and their respective successors and assigns that:  
  
      (i)  except as provided in the Assignment, all representations,
      warranties, and agreements of the Guarantor under the Consent and
      Guaranty insofar as they relate to the Assigned Warranties with
      respect to the Aircraft shall inure to the benefit of the Lessor
      and its respective successors and permitted assigns, to the same
      extent as if the Lessor and its successors and permitted assigns
      had originally been named the "Buyer" of the Aircraft therein; 
  
      (ii)  the Guarantor will pay to the person or entity entitled to
      receive the corresponding payment from AVSA under the terms of
      the Assignment all amounts required to be paid by the Guarantor
      with respect to the Aircraft;  
  
      (iii)  the Guarantor consents to the sale of the Aircraft by
      Lessee to the Lessor, the assignment of Assignor's rights and
      interests under the Purchase Agreement and the Consent and
      Guaranty to the Lessor pursuant to the Assignment and to the
      assignment of the Lessor's rights and interests in the Assignment
      to the Indenture Trustee pursuant to the Indenture and the lease
      of the Aircraft by the Lessor to the Assignor under the Lease;
      and 
  
      (iv)  from and after the purchase of the Aircraft pursuant to the
      Participation Agreement and payment in full for the Aircraft, the
      Guarantor will not assert any lien or claim against the Aircraft
      or any part thereof or against the Lessee, the Lessor, the Owner
      Participant or the Indenture Trustee arising on or prior to such
      purchase or in respect of any work or services performed on or
      prior thereto. 
  
           The Guarantor hereby represents and warrants that:  
  
           (A)  the Guarantor is a groupement d'interet economique duly
 organized and existing in good standing under the laws of the Republic of
 France and has the requisite power and authority to enter into and perform
 its obligations under the Consent and Guaranty and this Consent and
 Agreement; 
  
           (B)  the making and performance, in accordance with their terms
 of the Consent and Guaranty and this Consent and Agreement have been duly
 authorized by all necessary corporate action on the part of the Guarantor,
 do not require the consent or approval of the members of the Guarantor, do
 not require the consent or approval of,or the giving of notice to, or
 registration with, or the taking of any other action in respect of, any
 French governmental authority or agency except for those that have already
 been obtained and do not contravene any law binding on the Guarantor or
contravene the Guarantor's charter documents or any indenture, credit agreement
or other contractual agreement to which the Guarantor is a party
 or by which it is bound; 
  
           (C)  the Consent and Guaranty constituted, as of the date thereof
 and at all times thereafter to and including the date of this Consent and
 Agreement, and each of this Consent and Agreement and the Consent and
 Guaranty constitutes, binding obligations of the Guarantor enforceable
 against the Guarantor in accordance with their respective terms, subject
 to: (i) the limitations of applicable bankruptcy, insolvency,
 reorganization, moratorium or similar laws affecting the rights of
 creditors generally; and (ii) general principles of equity (regardless of
 whether such enforceability is considered in a proceeding in equity or at
 law), which principles do not make the remedies available at law or in
 equity with respect to the Purchase Agreement and this Consent and
 Agreement inadequate for the practical realization of the benefits intended
 to be provided thereby;  
  
           (D)  the Consent and Guaranty is in full force and effect; and  
  
           (E)  this Consent and Agreement is made subject to and with the
 benefit of Clause 3 of the Assignment and Section 4.03 of the Indenture.  
  
                            *   *   *   *   *   *
           THIS CONSENT AND AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
 ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, INCLUDING ALL MATTERS OF
 CONSTRUCTION, VALIDITY AND PERFORMANCE.       
  
            
 Dated as of ________________ 
  

                          AIRBUS INDUSTRIE G.I.E.  
  
                          By:   _______________________________  
                          Name: 
                          Title: 
  
  
                           AVSA CONSENT AND AGREEMENT
  
           The undersigned, AVSA, S.A.R.L., a societe a responsabilite
 limitee organized and existing under the laws of the Republic of France
 ("AVSA"), hereby acknowledges notice of and consents to all of the terms of
 the Purchase Agreement Assignment between US Airways, Inc., a Delaware
 corporation, and First Security Bank, National Association, not in its
 individual capacity, but solely as Lessor, with respect to US Airways, Inc.
 Trust No. N7__UW, dated as of ______________  (hereinafter called the
 "Assignment," the defined terms therein being hereinafter used with the
 same meaning), and to the assignment of the Assigned Warranties to the
 Indenture Trustee under the Indenture, dated as of _____________, between
 __________ and _____________ (hereinafter called the "Indenture"), and
 hereby confirms to the Assignor and the Lessor and their respective
 successors and assigns that: 
  
      (i)  except as provided in the Assignment, all representations,
      warranties, indemnities and agreements of AVSA under the Purchase
      Agreement insofar as they relate to the Assigned Warranties with
      respect to the Aircraft shall inure to the benefit of the Lessor
      and its respective successors and permitted assigns to the same
      extent as if the Lessor and its successors and permitted assigns
      had originally been named the "Buyer" of the Aircraft therein; 
  
      (ii)  AVSA will pay to the Assignor all payments required to be
      paid by it under the Purchase Agreement, unless and until AVSA
      shall have received written notice from the Indenture Trustee or
      the Lessor (or, after the Indenture shall have been discharged in
      full, the Lessor) addressed to it at the address and in the
      manner set forth in the Assignment that an Event of Default has
      occurred and is continuing, whereupon AVSA will make any and all
      payments thereafter required to be made by it under the Purchase
      Agreement, to the extent that the right to receive such payment
      has been assigned under the Assignment ("AVSA Payments"),
      directly to the Indenture Trustee (or, after the Indenture shall
      have been discharged in full, the Lessor) if AVSA shall have
      received notice as aforesaid that an Event of Default has
      occurred and is continuing; 
  
      (iii)  The Lessor shall not be liable for any of the obligations
      or duties of the Assignor under the Purchase Agreement, nor shall
      the Assignment give rise to any duties or obligations whatsoever
      on the part of the Lessor owing to AVSA, except for the
      agreements of the Lessor set forth in the Assignment, including,
      but not limited to Section 3(b) of the Assignment; 
  
      (iv)  AVSA consents to the sale of the Aircraft by Lessee to
      Lessor, assignment of the Lessor's rights and interests in the
      Assignment to the Indenture Trustee pursuant to the Indenture and
      to the lease of the Aircraft by the Lessor to the Lessee under
      the Lease; and 
  
      (v)  from and after the purchase of the Aircraft pursuant to the
      Participation Agreement and payment in full for the Aircraft,
      AVSA will not assert any lien or claim against the Aircraft or
      any part thereof arising on or prior to such purchase or in
      respect of any work or services performed on or prior thereto. 
  
           AVSA hereby represents and warrants that: 
  
           (A)  AVSA is a societe a responsabilite limitee duly organized
 and existing in good standing under the laws of the Republic of France and has 
the requisite power and authority to enter into and perform its
 obligations under the Purchase Agreement and this Consent and Agreement;  
  
           (B)  the making and performance, in accordance with their terms,
 of the Purchase Agreement and this Consent and Agreement have been duly
 authorized by all necessary corporate action on the part of AVSA, do not
 require any approval of AVSA's shareholders, do not require the consent or
 approval of, the giving notice to, or registration with, or the taking of
 any other action in respect of, any French governmental authority or agency
 except for those that have already been obtained and do not contravene any
 law binding on AVSA or contravene AVSA's charter documents or any
 indenture, credit agreement or other contractual agreement to which AVSA is
 a party or by which it is bound; 
  
           (C)  each of the Purchase Agreement and this Consent and
 Agreement constitutes a binding obligation of AVSA enforceable against AVSA
 in accordance with its terms, subject to: (i) the limitations of applicable
 bankruptcy, insolvency, reorganization, moratorium or similar laws
 affecting the rights of creditors generally; and (ii) general principles of
 equity (regardless of whether such enforceability is considered in a
 proceeding in equity or at law), which principles do not make the remedies
 available at law or in equity with respect to the Purchase Agreement and
 this Consent and Agreement inadequate for the practical realization of the
 benefits intended to be provided thereby;   
           (D)  the Purchase Agreement is in full force and effect as to
 AVSA; and 
  
           (E)  this Consent and Agreement is made subject to and with the
 benefit of Clause 3 of the Assignment and Section 4.03 of the Indenture.  
  
                                * * * * * * 


       THIS CONSENT AND AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
 ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK, INCLUDING ALL MATTERS OF
 CONSTRUCTION, VALIDITY AND PERFORMANCE. 
  
 Dated as of ________________ 
  
  
                          AVSA, S.A.R.L.  
  
                          By:  ________________________________  
                          Name: 
                          Title: 
 


EXHIBIT 4(a)(xvii)
                          AFFIDAVIT OF CITIZENSHIP 
                            [OWNER PARTICIPANT] 
  
  
 STATE OF _______________           } 
                                    } SS. 
 COUNTY OF ____________             } 
  
  
 I, _______________, being duly sworn, depose and say, that: 
  
 1.   I am the duly qualified and acting [Assistant] Secretary of [Owner
      Participant] (the "Corporation"); 
  
 2.   The Corporation is duly organized under the laws of the State of
      __________; 
  
 3.   The [Chief Executive Officer/President] and two-thirds or more of the
      Board of Directors and other managing officers of the Corporation are
      individuals who are citizens of the United States of America; 
  
 4.   At least seventy-five percent (75%) of the voting interest of the
      Corporation is owned or controlled by persons or corporations who are
      citizens of the United States of America; 
  
 5.   Accordingly, the Corporation is a "Citizen of the United States" as
      defined in Section 40102(a)(15) of Title 49 of the United States Code. 
  
 SWORN to this ____ day of __________, 199_. 
  
                               [OWNER PARTICIPANT] 
  
  
                               By:_____________________________ 
                               Name: 
                               Title: 
  
 SWORN AND SUBSCRIBED TO 
 before me this ____ day of 
 __________, 199_ 
  
  
 ______________________________    
 Notary Public  
  
 My Commission Expires on _________________
              
 
  
 ===========================================================================  
                                       
                              TRUST AGREEMENT 
                   (US Airways, Inc.  Trust No.  N7__UW) 
  
  
  
                      Dated as of _________  __, 199_ 
  
  
  
                                  between 
  
  
  
                            [OWNER PARTICIPANT], 
  
                                   Owner Participant 
  
  
                                    and 
  
  
                 FIRST SECURITY BANK, NATIONAL ASSOCIATION, 
  
                                   Owner Trustee 
  
  
                          One Airbus A319 Aircraft 
                        FAA Registration Mark N7__UW 
                                                                             
===========================================================================  



                              TRUST AGREEMENT 
                   (US Airways, Inc.  Trust No.  N7__UW) 
  
           This TRUST AGREEMENT (US Airways, Inc.  Trust No.  N7__UW) dated
 as of _________ __, 199_ between [OWNER PARTICIPANT], a __________
 corporation (the "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") (as hereafter from time to time
 supplemented or amended, this or the "Trust Agreement"); 


           NOW THEREFORE, in consideration of the mutual covenants and
 agreements contained herein, FSB and the Owner Participant hereby agree as
 follows: 


                            W I T N E S S E T H: 
  
                                  ARTICLE I


                            DEFINITIONS AND TERMS
  
           SECTION 1.01   CERTAIN DEFINITIONS.  Capitalized terms used but
 not defined herein shall have the respective meanings set forth or
 incorporated by reference, and shall be construed and interpreted in the
 manner described, in Annex A.
  
                                 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 shall continue to 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
  
           SECTION 3.01   ACCEPTANCE OF AIRCRAFT. 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, 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)  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
  
           (f)  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. section 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 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 2 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 Owner Participant and
      the Owner Trustee.
  
           SECTION 3.03   AUTHORIZATION IN RESPECT OF A TERMINATION OF THE
 LEASE AND ASSUMPTION OF THE EQUIPMENT NOTES. 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 7(u) of the
 Participation Agreement upon Lessee's purchasing the Aircraft pursuant to
 Section 19(c) of the Lease and upon Lessee's assuming the indebtedness
 evidenced by the Equipment Notes in accordance with the provisions of such
 Section 7(u).
  
           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 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) 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 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 of the Lease, subject to due compliance with the
 terms of such Section 5:
  
           (a)  accept from Lessee the bill of sale with respect to such
      engine contemplated by such Section 5 (if tendered);
  
           (b)  transfer its interest in (without recourse except as to
      obligations in respect of Lessor Liens) and to an Engine to Lessee as
      contemplated by such Section 5; and
  
           (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 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 4.1(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 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 (the trust office of the Owner Trustee shall be 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), 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 a Least Default or an event which with the passage of time or
 the giving of notice or both would constitute 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 within 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 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 in full all Lessor Liens which it is required to
 discharge pursuant to Section 7(f) 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 Sections 7(a),
 7(b), 7(f), 7(g), 7(m), 7(o), 7(p), 7(s) or 7(u) 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. section 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 Owner Trustee
 receives from Lessee pursuant to Section 11 of the Lease, (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 7 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 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 23 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 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, 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.
  
           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.
  
                                 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 nonperformance 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 Sections 7(a), 7(b), 7(f), 7(g), 7(m), 7(o), 7(p), 7(s) or 7(u)
 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 Trust Estate, subject to the Lien of the Trust
 Indenture, which shal1 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
 7(k) of the Participation Agreement shall (with the same force and effect
 as if set forth in full, mutatis, 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.  In addition to the provisions of
 Section 7(k) of the Participation Agreement:  (i) any such transfer 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
 Equipment Notes remain unpaid, such transferee and its transferor shall
 have complied with all of the terms of Section 7(k) of the Participation
 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
 7(a) 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 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: 
  
           (A)  all powers, duties, obligations and rights conferred upon
      the Owner Trustee in respect of the custody, control and management of
      monies, 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 Equipment
      Notes 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 9 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
 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 Lessee, the Indenture
 Trustee and each holder of a Equipment Note.
  
           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
 Joseph P.  Kennedy 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.
  
           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 7(k) 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 Equipment Note 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 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.


           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. 
  
  
                               [OWNER PARTICIPANT] 
  
  
                               BY_____________________________   
                               Name: 
                               Title: 
  
  
                               FIRST SECURITY BANK, 
                               NATIONAL ASSOCIATION 
  
  
                               BY____________________________     
                               Name: 
                               Title:   
  
 


EXHIBIT 4(a)(xviii)                                            Owned Aircraft
                                                       Participation Agreement
                                                                        N7__UW

- ------------------------------------------------------------------------------



                          PARTICIPATION AGREEMENT
                                  (N7__UW)

                                Dated as of
                             _________ __, 199_

                               By and Between

                             US AIRWAYS, INC.,
                                   Owner

                                    and

                    STATE STREET BANK AND TRUST COMPANY,
                   not in its individual capacity except
                as expressly provided herein, but solely as
                   Pass Through Trustee under each of the
                       Pass Through Trust Agreements,
                 Subordination Agent and Indenture Trustee


                          ------------------------


                          One Airbus A319 Aircraft
                        U.S. Registration No. N7__UW



- ------------------------------------------------------------------------------



                      INDEX TO PARTICIPATION AGREEMENT


SECTION 1.  Definitions and Construction............................2

SECTION 2.  Participation by Pass Through Trustees in Owner's
            Cost of the Aircraft....................................2
            (a)   Participation by Pass Through Trustees on the
                  Delivery Date; Issuance of Equipment Notes........2
            (b)   Owner's Notice of Delivery Date...................3
            (c)   Closing...........................................3
            (d)   Postponement of Scheduled Delivery Date...........3

SECTION 3.  [Reserved...............................................4

SECTION 4.  Conditions Precedent....................................4
            (a)   Conditions Precedent to Purchase of Equipment
                  Notes ............................................4
            (b)   Conditions Precedent to the Obligations 
                  of Owner.........................................10

SECTION 5.  [Reserved.]............................................12

SECTION 6.  Representations and Warranties of Owner; Indemnities...12
            (a)   Representations and Warranties...................12
            (b)   General Indemnity................................15

SECTION 7.  Representations, Warranties and Covenants..............19
            (a)   Securities Act...................................19
            (b)   Reregistration...................................19
            (c)   Quiet Enjoyment..................................21
            (d)   Equipment Notes Acquired for Investment..........21
            (e)   Owner Merger Covenant............................21
            (f)   Representations, Warranties and Covenants 
                  of the Indenture Trustee.........................23
            (g)   Quiet Enjoyment..................................24
            (h)   Loan Participant Liens...........................24
            (i)   Indenture Trustee Liens..........................25
            (j)   Further Assurances...............................25
            (k)   Transfer of Equipment Notes......................25
            (l)   Representations and Warranties of Pass Through
                  Trustee..........................................25
            (m)   Representations and Warranties of Subordination
                  Agent............................................28

SECTION 8.  Reliance of Liquidity Provider.........................30

SECTION 9.  Other Documents........................................30

SECTION 10. Certain Covenants of Owner.............................30
            (a)   Further Assurances...............................31
            (b)   Filings..........................................31

SECTION 11. [Reserved].............................................31

SECTION 12. Notices; Consent to Jurisdiction.......................31
            (a)   Notices..........................................31
            (b)   Consent to Jurisdiction..........................31

SECTION 13. [Reserved.]............................................32

SECTION 14. Miscellaneous..........................................32
            (a)   Survival.........................................32
            (b)   Counterparts.....................................32
            (c)   Amendments and Waivers...........................32
            (d)   Successors and Assigns...........................33
            (e)   Governing Law....................................33



                                  ANNEXES

ANNEX A - Definitions

                                 SCHEDULES

SCHEDULE I    - Names and Addresses
SCHEDULE II   - Commitments
SCHEDULE III  - Pass Through Trust Agreement and Pass Through Trust
                Supplements

                                  EXHIBITS

Exhibit A     - Schedule of Countries Authorized for Reregistration
Exhibit B-1   - Form of Opinion of Skadden, Arps, Slate, Meagher & Flom LLP
                and Affiliates, special counsel for Owner 
Exhibit B-2   - Form of Opinion of Owner's Legal Department 
Exhibit C     - Form of Opinion of_____________, special counsel for the 
                Manufacturer
Exhibit D     - Form of Opinion of Crowe & Dunlevy, P.C., special FAA Counsel
Exhibit E     - Form of Opinion of Bingham Dana LLP, special counsel for the 
                Indenture Trustee
Exhibit F     - Form of Opinion of Bingham Dana LLP, special counsel for the 
                Pass Through Trustee
Exhibit G     - Form of Opinion of Bingham Dana LLP, special counsel for the 
                Subordination Agent



                          PARTICIPATION AGREEMENT
                              (N7__UW)


            THIS PARTICIPATION AGREEMENT (N7__UW) dated as of _______ ___,
199_ (as amended, supplemented or otherwise modified from time to time,
this "Agreement") by and between US AIRWAYS, INC., a Delaware corporation
(together with its successors and permitted assigns, the "Owner"), and
STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company, not in
its individual capacity except as otherwise provided herein, but solely as
pass through trustee under each of three separate Pass Through Trust
Agreements (in such capacity, together with its successors and permitted
assigns, the "Pass Through Trustee"), subordination agent and trustee under
the Intercreditor Agreement (in such capacity, together with its successors
and permitted assigns, the "Subordination Agent"), and Indenture Trustee
under the Indenture (in such capacity, together with any successor
indenture trustee, the "Indenture Trustee");


                        W I T N E S S E T H:

            WHEREAS, concurrently with the execution and delivery of this
Agreement, the Indenture Trustee and the Owner are entering into the
Indenture pursuant to which the Owner will issue to the Pass Through
Trustee for each Pass Through Trust Equipment Notes in three series, which
Equipment Notes are to be secured by the mortgage and security interests
created by the Owner in favor of the Indenture Trustee;

            WHEREAS, concurrently with the execution and delivery of this
Agreement, Owner will execute and deliver an Indenture Supplement covering
the Aircraft, supplementing the Indenture;

            WHEREAS, the proceeds from the issuance and sale of the Pass
Through Certificates by each Pass Through Trust will be applied in part by
the Pass Through Trustee on the Delivery Date to purchase from Owner, on
behalf of each Pass Through Trust, all of the Equipment Notes bearing the
same interest rate as the Certificates issued by such Pass Through Trust;

            WHEREAS, the Equipment Notes will be held by the Subordination
Agent pursuant to the Intercreditor Agreement on behalf of the Pass
Through Trusts;

            NOW, THEREFORE, in consideration of the mutual agreements
herein contained, the parties hereto agree as follows:

      SECTION 1.  DEFINITIONS AND CONSTRUCTION.

            Capitalized terms used but not defined herein shall have the
respective meanings set forth or incorporated by reference, and shall be
construed and interpreted in the manner described, in Annex A.

      SECTION 2.  PARTICIPATION BY PASS THROUGH TRUSTEES IN OWNER'S
COST OF THE AIRCRAFT.

            (a) Participation by Pass Through Trustees on the Delivery
Date; Issuance of Equipment Notes. Subject to the terms and conditions of
this Agreement, the Pass Through Trustee for each Pass Through Trust agrees
to make a secured loan to Owner on the Delivery Date to finance, in part,
Owner's payment of Owner's Cost for the Aircraft by paying to Owner the
aggregate purchase price of the Equipment Notes 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 Owner
on a date to be designated pursuant to Section 2(b) but in no event later
than __________________, by transferring to the account of Owner at State
Street Bank and Trust Company, 225 Franklin Street, Boston, Massachusetts
02110, ABA No. 011-00- 0028, Account No. 9903-990-1, Reference: US Airways,
Inc. 1998 EETC/N7__UW), 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 Owner, Owner shall issue pursuant to
Article II of the Indenture, to the Subordination Agent on behalf of the
Pass Through Trustee for each of the Pass Through Trusts, Equipment Notes
of the maturity and aggregate principal amount, bearing the interest rate
and for the purchase price set forth on Schedule II opposite the name of
such Pass Through Trust.

            (b) Owner's Notice of Delivery Date. Owner agrees to give the
Indenture Trustee, the Pass Through Trustee and the Subordination Agent at
least three (3) Business Days written or facsimile notice prior to the
Delivery Date, which notice shall specify Owner's Cost for the Aircraft,
the Delivery Date for the Aircraft, the serial number of the Airframe and
each Engine, and the United States registration number for the Aircraft.

            (c) Closing. The closing of the transactions referred to in
this Agreement shall take place commencing at 9:30 a.m. local time, on the
Delivery Date, at the offices of Skadden, Arps, Slate, Meagher & Flom LLP
in Washington, D.C.

            (d)    Postponement of Scheduled Delivery Date.

            (i) If for any reason whatsoever the closing of the
      transactions contemplated hereby is not consummated on the Delivery
      Date provided for pursuant to Section 2(b) (the "Scheduled Delivery
      Date"), the closing shall be deemed adjourned to the next Business
      Day or to such other Business Day on or prior to _______________ as
      Owner shall specify by written notice to the Pass Through Trustee and
      the Indenture Trustee, in which case the Pass Through Trustee shall
      comply with its obligations under Section 1.01 of each applicable
      Pass Through Trust Supplement.

            (ii) If the closing fails to occur on the Scheduled Delivery
      Date, Owner shall cause the Indenture Trustee to promptly return to
      the Pass Through Trustees any funds provided by any such Pass Through
      Trustee, together with interest or income earned thereon.

            (iii) If the closing fails to occur on the Scheduled Delivery
      Date and funds are not returned to each Pass Through Trustee that
      made funds available as provided by clause (ii) above, Owner shall
      use reasonable efforts to cause the Indenture Trustee to invest, at
      the risk of Owner, the funds received by it from such Pass Through
      Trustees in Cash Equivalents. Any such obligations purchased by
      Owner, whether directly or through a repurchase agreement, shall be
      held in trust by the Indenture Trustee for the benefit of the
      respective Pass Through Trustees that provided such funds.

            (iv) If the closing fails to occur on the Scheduled Delivery
      Date, unless Owner shall cause the Indenture Trustee to return all
      funds to the Pass Through Trustee by 2:00 p.m., New York City time,
      on the Scheduled Delivery Date, Owner shall reimburse each Pass
      Through Trustee that has made funds available pursuant to this
      Section 2 for the loss of the use of its funds an amount equal to the
      excess, if any, of (x) interest at the Debt Rate on the amount of
      such funds for the period from and including the Scheduled Delivery
      Date to but excluding the actual Delivery Date or, if earlier, the
      day on which such Pass Through Trustee's funds are returned if such
      return is made by 2:00 p.m., New York City time (or to but excluding
      the next following Business Day if such return is not made by such
      time) over (y) any amount paid to such Pass Through Trustee in
      respect of interest or income earned by Owner pursuant to clause
      (iii) above.

            (v) On the Delivery Date or on the date funds are required to
      be returned to the Pass Through Trustees pursuant to clause (ii)
      above, Owner shall reimburse the Pass Through Trustees that provided
      funds which are invested by Owner pursuant to this subsection (d),
      for any losses incurred on such investments. All income and profits
      on the investment of such funds shall be for the respective accounts
      of such Pass Through Trustee, and Owner shall not be liable for
      failure to invest such funds or for any losses incurred on such
      investments, except for its own negligence or willful misconduct.


      SECTION 3.  [RESERVED.]


      SECTION 4.  CONDITIONS PRECEDENT.

            (a) Conditions Precedent to Purchase of Equipment Notes. It is
agreed that the obligations of the Indenture Trustee, the Subordination
Agent and the Pass Through Trustee on behalf of each Pass Through Trust to
participate in the transaction contemplated hereby on the Delivery Date are
subject to the fulfillment to the satisfaction of each party (or waiver by
such party), prior to or on the Delivery Date of the following conditions
precedent:

            (i) At least three (3) Business Days prior to the Delivery
      Date, each of the parties hereto shall have received the Delivery
      Notice pursuant to Section
      2(b) hereof.

            (ii) On the Delivery Date, 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
      2.

            (iii) 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 Indenture
      Trustee, the Pass Through Trustee and the Subordination Agent and
      shall be in full force and effect and executed counterparts shall
      have been delivered to the Indenture Trustee, the Pass Through
      Trustee and the Subordination Agent, or their respective 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 Equipment Note 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 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);

                  (2)   the Trust Indenture;

                  (3)   the Indenture Supplement; and

                  (4) the Equipment Notes.

            (iv) A Uniform Commercial Code financing statement or
      statements covering all the security interests created by or pursuant
      to the Granting Clause of the Indenture that are not covered by the
      recording system established by the Transportation Code shall have
      been executed and delivered by 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 Owner and duly filed.

            (v) The Indenture Trustee, the Pass Through Trustee and the
      Subordination Agent shall have received the following, in each case
      in form and substance satisfactory to it (except it shall not be a
      condition to the obligation of any such party that it receive a
      certificate or other document required to be delivered by it):

            (A) (1) an incumbency certificate of Owner as to the person or
            persons authorized to execute and deliver the Operative
            Documents to which Owner is a party and any other documents to
            be executed on behalf of Owner 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 Owner or Owner's executive committee, certified by the
            Secretary or an Assistant Secretary of Owner, 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 Owner in connection with the
            transactions contemplated hereby; and

                  (3) a copy of the certificate of incorporation of Owner,
            certified by the Secretary of State of the State of Delaware,
            and a copy of the by-laws of Owner certified by the Secretary
            or Assistant Secretary of Owner, and a certificate or other
            evidence from the Secretary of State of the State of Delaware,
            dated as to the due incorporation and good standing of Owner in
            such state.

            (B) (1) an incumbency certificate of the Indenture Trustee as
            to the person or persons authorized to execute and deliver the
            Operative Documents to which the Indenture Trustee is a party
            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 in all material respects 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).

            (vi) 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.

            (vii) The Indenture Trustee, the Pass Through Trustee and the
      Subordination Agent shall have received a certificate signed by an
      authorized officer of Owner 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 Indenture and the 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) the representations and warranties contained herein
            of Owner are correct in all material respects 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 were correct
            on and as of such earlier date).

            (viii) [Reserved.]

            (ix) The Indenture Trustee, the Pass Through Trustee and the
      Subordination Agent shall have received, addressed to each such
      party, and reasonably satisfactory as to scope and substance to each
      addressee thereof, opinions dated the Delivery Date substantially in
      the form of Exhibit B-1 hereto from Skadden, Arps, Slate, Meagher &
      Flom LLP and Affiliates, special counsel for Owner, and an opinion
      dated the Delivery Date substantially in the form of Exhibit B-2
      hereto from Owner's legal department.

            (x) The Pass Through Trustee shall have received, addressed to
      the Pass Through Trustee, the Indenture Trustee and Owner and
      reasonably satisfactory as to scope and substance to the Pass Through
      Trustee and Owner,
      an opinion dated the Delivery Date substantially in the form of
      Exhibit C hereto from _________________, special counsel to the
      Manufacturer, with respect to the Manufacturer Documents.

            (xi)  [Reserved.]

            (xii) [Reserved.]

            (xiii)The Indenture Trustee, the Pass Through Trustee and the
      Subordination Agent shall have received, addressed to each such
      party, and reasonably satisfactory as to scope and substance to each
      addressee thereof, an opinion dated the Delivery Date substantially
      in the form of Exhibit D hereto from Crowe & Dunlevy, P.C., special
      FAA counsel.

            (xiv) The Pass Through Trustee and the Subordination Agent
      shall have received, addressed to each such party, and reasonably
      satisfactory as to scope and substance to each addressee thereof, an
      opinion dated the Delivery Date substantially in the form of Exhibit
      E from Bingham Dana LLP, special counsel for the Indenture Trustee.

            (xv)  [Reserved.]

            (xvi) The Indenture Trustee, the Pass Through Trustee and the
      Subordination Agent shall have received an independent insurance
      broker's report, in form and substance satisfactory to the Indenture
      Trustee, as to the due compliance with the terms of Section 11 of the
      Lease relating to insurance with respect to the Aircraft.

            (xvii)  [Reserved.]

            (xviii) 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.

            (xix) [Reserved.]

            (xx)  [Reserved.]

            (xxi) The Indenture Trustee and the Subordination Agent 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 in all material respects 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 dated the Delivery Date
      substantially in the form of Exhibit F hereto addressed to each such
      party of Bingham Dana LLP, special counsel for the Pass Through
      Trustee, and reasonably satisfactory as to scope and substance to
      each addressee thereof, and (C) 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 corporate
      action in connection therewith and compliance with the conditions
      herein set forth.

            (xxii) The Indenture Trustee and the Pass Through Trustee shall
      have received, addressed to each such party, and reasonably
      satisfactory as to scope and substance, to each addressee thereof, an
      opinion dated the Delivery Date substantially in the form of Exhibit
      G hereto.

            Promptly upon the recording of the Indenture and the Indenture
Supplement covering the Aircraft pursuant to the Transportation Code, Owner
will cause Crowe & Dunlevy, P.C., special FAA counsel in Oklahoma City,
Oklahoma, to deliver to the Pass Through Trustee, the Indenture Trustee and
Owner an opinion as to the due recording of the Indenture and such
Indenture Supplement and the lack of filing of any intervening documents
with respect to the Aircraft.

            (b) Conditions Precedent to the Obligations of Owner. It is
agreed that the obligations of Owner to enter into the Operative Documents
on the Delivery Date are all subject to the fulfillment to the satisfaction
of Owner prior to the Delivery Date of the following conditions precedent:

            (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) hereof shall
      have been satisfied.

            (iii) Those documents described in Section 4(a)(iii) shall have
      been duly authorized, executed and delivered by the respective party
      or parties thereto (other than Owner) in the manner specified in
      Section 4(a)(iii), shall each be satisfactory in form and substance
      to Owner, shall be in full force and effect on the Delivery Date, and
      an executed counterpart of each thereof (other than the Equipment
      Notes) shall have been delivered to Owner or its special counsel.

            (iv) Owner shall have received (A) each certificate referred to
      in Section 4(a)(v) (other than the certificate referred to in clause
      (A) thereof), (B) the certificate referred to in Section
      4(a)(xxi)(A), and (C) such other documents and evidence with respect
      to the Pass Through Trustee as Owner 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
      corporate proceedings in connection therewith and compliance with the
      conditions herein set forth.

            (v) Owner shall have received the opinions set forth in
      Sections 4(a)(x), 4(a)(xiii), 4(a)(xiv), 4(a)(xxi)(B), and 4(a)(xxii)
      in each case addressed to Owner and dated the Delivery Date and in
      each case in scope and substance reasonably satisfactory to Owner 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.

            (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 Owner to enter into any transaction
      contemplated by the Operative Documents.

            (viii) Owner shall have been paid by the Pass Through
      Trustees for the issuance of the Equipment Notes.

      SECTION 5.  [Reserved.]

      SECTION 6.  REPRESENTATIONS AND WARRANTIES OF OWNER;
INDEMNITIES.

            (a) Representations and Warranties. Owner represents and
warrants to the Pass Through Trustee, the Indenture Trustee and the
Subordination Agent that:

            (i) Owner 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 Owner Documents, the Pass Through Trust Agreements
      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), business or
      properties of Owner and its subsidiaries considered as one
      enterprise;

            (ii) 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 Virginia) is located at
      Arlington, Virginia;

            (iii) the execution and delivery by Owner of Owner Documents,
      the Pass Through Trust Agreements and each other Operative Document
      to which Owner is a party, and the performance of the obligations of
      Owner under Owner Documents, the Pass Through Trust Agreements and
      each other Operative Document to which Owner is a party, have been
      duly authorized by all necessary corporate action on the part of
      Owner, do not require any stockholder approval, or approval or
      consent of any trustee or holder of any material indebtedness or
      material obligations of Owner, 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 Owner or the
      certificate of incorporation or by-laws of Owner, 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 Owner under, any indenture, mortgage, contract or other agreement
      to which Owner 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 Owner and its subsidiaries considered as one
      enterprise;

            (iv) neither the execution and delivery by Owner of Owner
      Documents, the Pass Through Trust Agreements or any other Operative
      Document to which Owner is a party, nor the performance of the
      obligations of Owner under Owner Documents, the Pass Through Trust
      Agreements or the other Operative Documents to which Owner 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
      Owner, other than (A) the registration of the Pass Through Trust
      Certificates under the Securities Act of 1933, as amended, and under
      the securities laws of any state in which the Pass Through Trust
      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 Owner required to be obtained on or
      prior to the Delivery Date, which orders, permits, waivers,
      exemptions, authorizations and approvals have been, or on the
      Delivery Date will be, duly obtained and are, or on the Delivery Date
      will be, in full force and effect, (D) the registrations and filings
      referred to in Section 6(a)(vi), and (E) 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 Owner and its subsidiaries
      considered as one enterprise;

            (v) this Agreement, each of the other Owner Documents and the
      Pass Through Trust Agreements to which Owner is a party constitute
      (or, in the case of documents to be executed on the Delivery Date,
      will constitute) the legal, valid and binding obligations of Owner
      enforceable against Owner 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;

            (vi) (A) the filing for recording pursuant to the
      Transportation Code of the Indenture and the Indenture Supplement
      attached thereto and made a part thereof and (B) 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 Virginia and such
      other states as may be specified in the opinion furnished pursuant to
      Section 4(a)(xi) hereof, 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) or other action 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
      (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);

            (vii) neither Owner nor any of its Affiliates has directly or
      indirectly offered the Pass Through Trust 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) Owner is not 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
      a Default or an Event of Default;

            (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) 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 Equipment
      Notes will be used directly or indirectly by 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) except as may have been disclosed in Owner's reports
      filed with the Securities Exchange Commission, there are no pending
      or threatened actions or proceedings that individually or in the
      aggregate are expected to have a material adverse effect on the
      condition (financial or otherwise), business or properties of Owner
      and its subsidiaries considered as one enterprise.

            (b) General Indemnity. Owner hereby agrees to indemnify each
Indemnitee against, and agrees to protect, save and keep harmless each of
them from (whether or not the transactions contemplated herein or in any of
the other Operative Documents are consummated), any and all expenses
imposed on, incurred by or asserted against any Indemnitee, in any way
relating to, based on or arising out of (A) the execution, delivery and
performance of the Operative Documents or the Pass Through Documents and
the transactions contemplated thereby; (B) the manufacture, purchase,
acceptance or rejection of the Airframe or any Engine or Parts; (C) the
Aircraft (or any portion thereof) or any engine installed on the Airframe
or any airframe on which an Engine is installed whether or not arising out
of the manufacture, purchase, registration, reregistration, financing,
refinancing, ownership, delivery, nondelivery, inspection, lease, sublease,
possession, storage, use or non-use, operation, maintenance, overhaul,
modification, alteration, condition, replacement, repair, substitution,
sale, return or other disposition of the Aircraft including, without
limitation, any violation of law relating to the Aircraft (including
environmental laws), latent or other defects, whether or not discoverable,
strict tort liability and any claim for patent, trademark or copyright
infringement; or (D) the offer or sale of any interest in the Equipment
Notes or the Pass Through Certificates (or other evidence of the debt
relating to the Aircraft) on the Delivery Date or in connection with a
refinancing in accordance with the terms hereof (including any violation of
securities laws or ERISA); provided, that the foregoing indemnity shall not
extend to an Indemnitee with respect to any Expense to the extent such
Expense is attributable to one or more of the following: (1) any
representation or warranty by such Indemnitee in the Operative Documents or
the Pass Through Documents being incorrect, or (2) the failure by such
Indemnitee to perform or observe any of its agreements, covenants or
conditions in any of the Operative Documents or the Pass Through Documents,
or (3) the willful misconduct or the gross negligence of such Indemnitee,
or (4) (A) in the case of any Indemnitee, the offer, sale or other
disposition (voluntary or involuntary) by such Indemnitee of all or any
part of its interest in the Airframe or any Engine, (B) in the case of a
Note Holder, the offer, sale or other disposition (voluntary or
involuntary) by such Note Holder of all or any part of its interest in any
Equipment Note or (C) in the case of any Indemnitee, the offer, sale or
other disposition by such Indemnitee of all or any part of such
Indemnitee's interest in the Operative Documents, or (5) any Tax, or (6) in
the case of the Indenture Trustee in its individual and trust capacities,
failure on the part of the Indenture Trustee to distribute in accordance
with the Trust Indenture any amounts distributable by it thereunder, or (7)
in the case of any Pass Through Trustee or the Subordination Agent, failure
on the part of such Pass Through Trustee or the Subordination Agent to
distribute in accordance with the Intercreditor Agreement and the Pass
Through Trust Agreement amounts received and distributable thereunder, or
(8) the authorization or giving or withholding of any future amendments,
supplements, waivers or consents with respect to any of the Operative
Documents which amendments, supplements, waivers or consents are not
requested by Owner or are not occasioned by a specific requirement of the
Operative Documents, or (9) any amount which any Indemnitee expressly
agrees to pay under any Operative Document or any amount which is expressly
stated to be an expense that is not reimbursable by Owner under the
Operative Documents, or (10) any amount that is an ordinary and usual
operating or overhead expense of any Indemnitee (it being understood
out-of-pocket expenses payable to third parties do not constitute "ordinary
and usual operating and overhead expenses"), or (11) any amounts
attributable to any Lien which such Indemnitee is required to remove
pursuant to the terms of the Operative Documents or the Pass Through
Documents, or (12) any loss of tax benefits or increases in tax liability
or (13) any amount that constitutes principal of, or interest or premium on
the Equipment Notes.

            Owner's indemnity obligation to an Indemnitee under this
Section 6(b) shall equal the amount which, after taking into account any
Tax imposed upon the receipt or accrual of the amounts payable under this
Section 6(b) and any tax benefits realized by such Indemnitee as a result
of the accrual or payment of such Expense shall equal the amount of the
Expense indemnifiable under this Section 6(b).

            If any Indemnitee shall realize a tax savings by reason of any
Tax paid or indemnified by Owner pursuant to this Section 6(b) (whether
such tax savings shall be by means of a foreign tax credit, depreciation or
cost recovery deduction or otherwise) and such savings is not otherwise
taken into account in computing such payment or indemnity such Indemnitee
shall pay to Owner an amount equal to the lesser of (i) the amount of such
tax savings, plus any additional tax savings recognized as the result of
any payment made pursuant to this sentence, when, as if, and to the extent,
realized or (ii) the amount of all payments pursuant to this Section 6(b)
by Owner to such Indemnitee (less any payments previously made by such
Indemnitee to Owner pursuant to this Section 6(b)) (and the excess, if any,
of the amount described in clause (i) over the amount described in clause
(ii) shall be carried forward and applied to reduce pro tanto any
subsequent obligations of Owner to make payments to such Indemnitee
pursuant to this Section 6(b)).

            If a claim is made against an Indemnitee involving one or more
expenses and such Indemnitee has notice thereof, such Indemnitee shall
promptly after receiving such notice give notice of such claim to Owner;
provided that the failure to give such notice shall not affect the
obligations of Owner hereunder except to the extent Owner is prejudiced by
such failure or Owner's indemnification obligations are increased as a
result of such failure. Owner shall be entitled, at its sole cost and
expense, acting through counsel reasonably acceptable to the respective
Indemnitee, (A) in any judicial or administrative proceeding that involves
solely a claim for one or more expenses, to assume responsibility for and
control thereof, (B) 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 and to be allowed, at
Owner's sole expense, to participate therein. Notwithstanding any of the
foregoing to the contrary, Owner shall not be entitled to assume
responsibility for and control of, or participate in or be consulted with
respect to any such judicial or administrative proceedings 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 any part thereof unless in such an
event Owner shall have posted a bond or other security satisfactory to the
relevant Indemnitees in respect to such risk. The Indemnitee may
participate at its own expense and with its own counsel in any judicial
proceeding controlled by Owner pursuant to the preceding provisions.

            The Indemnitee shall supply Owner with such information
reasonably requested by Owner as is necessary or advisable for Owner to
control or participate in any proceeding to the extent permitted by this
Section 6(b). Such Indemnitee shall not enter into a settlement or other
compromise with respect to any Expense without the prior written consent of
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 6(b).

            Owner shall supply the Indemnitee with such information
reasonably requested by the Indemnitee as is necessary or advisable for the
Indemnitee to control or participate in any proceeding to the extent
permitted by this
Section 6(b).

            Upon payment of any Expense pursuant to this Section 6(b),
Owner, without any further action, shall be subrogated to any claims the
Indemnitee may have relating thereto. The Indemnitee agrees to give such
further assurances or agreements and to cooperate with Owner to permit
Owner to pursue such claims, if any, to the extent reasonably requested by
Owner.

            If an Indemnitee is reimbursed, in whole or in part, with
respect to any Expense paid by Owner hereunder, it will promptly pay the
amount refunded, including interest received thereto (but not an amount in
excess of the amount Owner or any of its insurers has paid in respect of
such Expense pursuant to this Section 6(b)) over to Owner.

            To the extent permitted by applicable law, interest at the Base
Rate plus one percent (1.0%) shall be paid, on demand, on any amount or
indemnity not paid when due pursuant to this Section 6 until the same shall
be paid. Such interest shall be paid in the same manner as the unpaid
amount in respect of which such interest is due.

            Any amount which is payable to Owner by any Person pursuant to
this Section 6 (b) shall not be paid to Owner if an Event of Default has
occurred and is continuing or if any payment is due and owing by Owner to
such Person under any Operative Document. Any such amount shall be held by
such Person (Owner hereby granting a security interest in such amount to
such Person) and shall be applied against Owner's obligations hereunder to
such Person as and when due (and, to the extent that Owner has no
obligations hereunder to such Person, such amount shall be paid to Owner).

            (d) Special Indemnity. If a Class C Special Indemnity Event
shall be continuing at any time, then on the final maturity date of the
Equipment Notes, Owner shall pay to the Pass Through Trustee on behalf of
the US Airways Pass Through Trust 1998-C the amount which has accrued
during the period in which the Equipment Notes were outstanding in
accordance with the following sentence and which remains unpaid on such
final maturity date (such amount, the "Class C Special Indemnity Payment").
The Class C Special Indemnity Payment shall accrue at a daily rate equal to
the Multiplier, in effect from time to time during the period in which the
Equipment Notes were outstanding, multiplied by the aggregate principal
amount of the Series C Equipment Notes outstanding on such date divided by
360. The Pass Through Trustee agrees that it will accept and receive the
Class C Special Indemnity Payment on behalf of the US Airways Pass Through
Trust 1998-C and that it will distribute the Class C Special Indemnity
Payment in accordance with the Trust Agreement for the US Airways Pass
Through Trust 1998-C.

      SECTION 7.  REPRESENTATIONS, WARRANTIES AND COVENANTS.

            (a) Securities Act. Each Loan Participant represents and
warrants that neither it nor anyone acting in its behalf has offered any
Equipment Notes for sale to, or solicited any offer to buy any Equipment
Note from, any person or entity 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.

            (b) Reregistration. The Indenture Trustee and each Loan
Participant agree that, at any time after the Depreciation Period, so long
as no Event of Default shall have occurred and be continuing, Owner may
elect to effect a change in registration of the Aircraft, at Owner's cost
and expense, so long as the country of registry of the Aircraft is a
country listed on Exhibit A. Upon the request of the Lessee, Exhibit A
shall be amended from time to time to include any other country which the
Indenture Trustee have determined, acting reasonably, would provide
substantially equivalent protection for the rights of lenders in similar
transactions as provided under the laws of the United States of America and
the states thereof. In order for Owner to effect a change in the country of
registry of the Aircraft, Owner shall deliver to the Indenture Trustee the
following:

      (I)   an Officer's Certificate to the effect that (A) the insurance
            or self-insurance required by Section 7.04 shall be in full
            force and effect at the time of such change in registration
            after giving effect to such change in registration, (B) all
            indemnities in favor of the Indenture Trustee under any
            Operative Document afford each such party substantially the
            same protection as provided prior to such change of registry,
            (C) the Lien of the Trust Indenture in favor of the Indenture
            Trustee will continue as a first priority lien following such
            change of registry, (D) such change will not result in the
            imposition of, or increase in the amount of, any Tax for which
            Owner is not required to indemnify, or is not then willing to
            enter into a binding agreement to indemnify, the Certificate
            Holders or the Indenture Trustee, pursuant to this Agreement,
            and (E) that the new country of registry imposes aircraft
            maintenance standards not materially different from those of
            any Permitted Foreign Air Authority; and

      (II)  a favorable opinion (subject to customary exceptions) of
            counsel (reasonably acceptable to the Indenture Trustee)
            addressed to the Indenture Trustee, from counsel of recognized
            reputation qualified in the laws of the relevant jurisdiction
            to the effect that: (A) 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 register or
            qualify to do business in such jurisdiction; (B) there is no
            tort liability of 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); (C) unless 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; and (D) after
            giving effect to such change in registration, the Lien of the
            Trust Indenture on 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
            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
            change in registration).

            Owner shall pay all reasonable 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.

            (c) Quiet Enjoyment. Each Loan Participant and each of the
Indenture Trustee, the Subordination Agent and the Pass Through Trustee
covenants and agrees that, so long as no Event of Default shall have
occurred and be continuing and Owner has not been duly declared in default
and, notwithstanding default by any Loan Participant, the Indenture
Trustee, the 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 Owner's continued
possession, use and operation of, and quiet enjoyment of, the Aircraft.

            (d) Equipment Notes Acquired for Investment. Each Loan
Participant represents and warrants that the Equipment Note to be issued to
it pursuant to the 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 Equipment
Note issued to it), except that the Loan Participants may sell, transfer or
otherwise dispose of any Equipment Note or any portion thereof, or grant
participations therein, in a manner which in itself does not require
registration under the Securities Act.

            (e) Owner Merger Covenant. 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
      Owner is merged or the Person which acquires by conveyance, transfer
      or lease substantially all of the assets of Owner as an entirety
      shall be (i) organized and validly existing under the laws of the
      United States of America or any state thereof or the District of
      Columbia, (ii) a "citizen of the United States" as defined in 49
      U.S.C. Section 40102(a)(15), as amended, and (iii) a Certificated Air
      Carrier, if and so long as such status is a condition of entitlement
      to the benefits of Section 1110 of the Bankruptcy Code with respect
      to the Lien of the Indenture;

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

            (iii) immediately after giving effect to such transaction, no
      Event of Default shall have occurred and be continuing; and

            (iv) Owner shall have delivered to the Indenture Trustee a
      certificate signed by the President, any Executive Vice President,
      any Senior Vice President or any Vice President and by the Secretary
      or an Assistant Secretary of Owner, and an opinion of counsel (which
      may be Owner's General Counsel, Deputy General Counsel, Assistant
      General Counsel or Associate General 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 Section 7(e) 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 Owner as an
entirety in accordance with this Section 7(e), the successor corporation or
Person formed by such consolidation or into which 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, Owner under
this Agreement with the same effect as if such successor corporation or
Person had been named as Owner herein. No such conveyance, transfer or
lease of substantially all of the assets of Owner as an entirety shall have
the effect of releasing Owner or any successor corporation or Person which
shall theretofore have become such in the manner prescribed in this Section
7(v) from its liability in respect of any Operative Document to which it is
a party.

            (f) Representations, Warranties and Covenants of the Indenture
Trustee. State Street Bank and Trust Company represents, warrants (as of
the Delivery Date) and covenants, in its individual capacity, to Owner, the
Pass Through Trustee and the Subordination Agent, as follows:

            (i) the Indenture Trustee is a Massachusetts trust company duly
      incorporated, validly existing and in good standing under the laws of
      the Commonwealth 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 9.02 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 Indenture and each other
      Operative Document to which it is a party and to carry out its
      obligations under this Agreement, the Indenture, each other Operative
      Document to which it is a party and to authenticate the Equipment
      Notes;

            (ii) the execution and delivery by the Indenture Trustee of the
      Indenture Trustee Documents and the authentication of the Equipment
      Notes 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 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 Liens on the Aircraft.

            (g) Confidentiality of Purchase Agreement. The Indenture
Trustee agrees for the benefit of the Seller, the Manufacturer and 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 Equipment Notes (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 Indenture), (C)
with the prior written consent of the Manufacturer, the Seller and Owner or
(D) to the Indenture Trustee's counsel or special counsel, independent
insurance brokers or other agents who agree to hold such information
confidential.

            (h) Loan Participant Liens. 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. 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 Owner for any
actual diminution of the assets of Owner resulting from such Loan
Participant Lien attributable to it.

            (i) Indenture Trustee Liens. 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
Indenture 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 Owner for any actual diminution of the assets
of the Indenture Estate resulting from such Indenture Trustee's Liens.

            (j) Further Assurances. 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 Indenture, the Indenture Supplement and
any financing statements or other instruments as are necessary to maintain,
so long as the Indenture is in effect, the perfection of the security
interests created by the 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 them to take such action. 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.

            (k) Transfer of Equipment Notes. Each Loan Participant hereby
represents, warrants and agrees that it shall not transfer any interest in
any Equipment Note unless and until the transferee agrees in writing
(copies of which shall be provided by the Indenture Trustee to 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
Indenture.

            (l) Representations and Warranties of Pass Through Trustee. The
Pass Through Trustee represents and warrants to Owner, the Indenture
Trustee and the Subordination Agent, in its capacity as such and in its
individual capacity, as follows:

            (i) the Pass Through Trustee is a state chartered trust company
      duly organized, 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 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;

            (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 Equipment Notes 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
      Commonwealth of Massachusetts 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 Massachusetts 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 Commonwealth of Massachusetts 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
      Commonwealth of Massachusetts or any political subdivision thereof in
      connection with the acquisition, possession or ownership by the Pass
      Through Trustee of any of the Equipment Notes (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 the trusts created by
      the Pass Through Trust Agreements will not be taxable as
      corporations, but rather, each will be characterized either 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 Commonwealth of Massachusetts 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 Pass Through Trust
      Certificates contemplated hereby, the Pass Through Trustee has not
      directly or indirectly offered any Equipment Note for sale to any
      Person or solicited any offer to acquire any Equipment Notes from any
      Person, nor has the Pass Through Trustee authorized anyone to act on
      its behalf to offer directly or indirectly any Equipment Note for
      sale to any Person, or to solicit any offer to acquire any Equipment
      Note 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 Owner.

            (m) Representations and Warranties of Subordination Agent. The
Subordination Agent represents and warrants to Owner, the Indenture Trustee
and the Pass Through Trustee, in its capacity as such and in its individual
capacity, as follows:

            (i) the Subordination Agent is a state chartered trust company
      duly organized, 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, the
      Liquidity Facilities and the Intercreditor 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 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 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);

            (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 Equipment Note for sale to any Person or solicited any
      offer to acquire any Equipment Notes from any Person, nor has the
      Subordination Agent authorized anyone to act on its behalf to offer
      directly or indirectly any Equipment Note for sale to any Person, or
      to solicit any offer to acquire any Equipment Note 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 Owner.

      SECTION 8. 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, warranties and covenants 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. Owner agrees and acknowledges that the Liquidity Provider shall
be a third party beneficiary of the indemnities contained in Section 6(b)
hereof, and may rely on such indemnities to the same extent as if such
indemnities were made to the Liquidity Provider directly.

      SECTION 9.  OTHER DOCUMENTS. So long as the Lien of the Trust
Indenture has not been terminated, the Pass Through Trustee, the
Subordination Agent and the Indenture Trustee hereby agree for the benefit
of Owner that without Owner's consent, each such party will not amend any
other provision of any Operative Document or Pass Through Document in a
manner adversely affecting Owner. Each of the Indenture Trustee, the
Subordination Agent and the Pass Through Trustee agree to promptly furnish
to Owner copies of any supplement, amendment, waiver or modification of any
of the Operative Documents or Pass Through Documents to which Owner is not
a party. Each Loan Participant agrees that it will not take any action in
respect of the Indenture Estate except through the Indenture Trustee
pursuant to the Indenture or as otherwise permitted by the Indenture.

      SECTION 10.  CERTAIN COVENANTS OF OWNER.  Owner covenants and agrees  
with each of the Loan Participants and the Indenture Trustee, as follows:

            (a) Further Assurances. 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
Owner will not expand any obligations or limit any rights of Owner in
respect of the transactions contemplated by any Operative Documents.

            (b) Filings. Owner, at its expense, will cause the Indenture,
all supplements and amendments to the Indenture and this Agreement to be
promptly filed and recorded, or filed for recording, to the extent
permitted under the Transportation Code, or required unde any other
applicable law. Upon the execution and delivery of the Indenture, the
Indenture and the Indenture Supplement shall be filed for recording with
the Federal Aviation Administration.

      SECTION 11.       [RESERVED.]

      SECTION 12.       NOTICES; CONSENT TO JURISDICTION.

            (a) Notices. 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 Agreement on the day that such writing is delivered to the recipient
thereof in accordance with the provisions of this Section 12(a). Unless
otherwise specified in a notice sent or delivered in accordance with the
foregoing provisions of this Section 12(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 Owner, 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 Note Holder, addressed
to such Note Holder at its address set forth in the Equipment Note register
maintained pursuant to Section 2.07 of the Indenture.

            (b) Consent to Jurisdiction. 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; provided, however that the foregoing shall not apply to the
right any party may have to seek removal of such suit, action or proceeding
to federal court or to seek consolidation of any separate actions, suits or
proceedings brought by one or more of the other parties in the same or
different jurisdictions. The agreement set forth in this Section 12(b) is
given solely for the benefit of the parties hereto and shall not inure to
the benefit of any other Person.

      SECTION 13.       [RESERVED.]

      SECTION 14.       MISCELLANEOUS.

            (a) Survival. The representations, warranties, indemnities and
agreements of Owner, the Indenture Trustee, the Subordination Agent, and
the Pass Through Trustee provided for in this Agreement or any other
Operative Document, and Owner'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 respective Commitments
by the Pass Through Trustee, the transfer of any interest by any Loan
Participant in any Equipment Note or the Trust Indenture Estate and the
expiration or other termination of this Agreement or any other Operative
Document.

            (b) Counterparts. 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.

            (c) Amendments and Waivers. 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.

            (d) Successors and Assigns. The terms of this Agreement shall
be binding upon, and inure to the benefit of, Owner and, subject to the
terms of this Agreement, 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, each Note 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.

            (e)  Governing Law.  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.



            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.

                           US AIRWAYS, INC.,
                           Owner


                           By:________________________________       
                           Name:
                           Title:
                           Address:  2345 Crystal Drive
                                     Arlington, Virginia 22227


                           STATE STREET BANK AND
                           TRUST COMPANY,
                           not in its individual capacity
                           except as otherwise provided herein,
                           but solely as Indenture Trustee


                           By:_________________________________  
                           Name:
                           Title:
                           Address:  Two International Place, 4th Floor
                                     Boston, Massachusetts 02110


                           STATE STREET BANK AND TRUST COMPANY, 
                           not in its individual capacity, except
                           as otherwise provided herein, but solely 
                           as Pass Through Trustee


                           By:_________________________________
                           Name:
                           Title:
                           Address:  Two International Place, 4th Floor
                                     Boston, Massachusetts 02110


                           STATE STREET BANK AND
                           TRUST COMPANY, not in its
                           individual capacity, except as otherwise  
                           provided herein, but solely as Subordination
                           Agent


                           By:__________________________________   
                           Name:
                           Title:
                           Address:  Two International Place, 4th Floor
                                     Boston, Massachusetts 02110



                                 SCHEDULE I


                            NAMES AND ADDRESSES


Owner:                      US Airways, Inc.

                            U.S. MAIL

                            2345 Crystal Drive
                            Arlington, Virginia 22227


                            OVERNIGHT COURIER

                            ____________________________
                            ____________________________
                            Attn:
                            Telecopy No.: (___) ___-____

                            WIRE TRANSFER
                            ____________________________
                            ABA No._________________
                            Acct. No._________________

Indenture Trustee,          State Street Bank and Trust Company
Subordination Agent
and Pass Through            U.S. MAIL
Trustee:
                            Two International Place, 4th Floor
                            Boston, Massachusetts 02110
                            Attn:    Corporate Trust Department
                                     Ruth A. Smith
                            Telecopy No.: (617) 664-5371


                            OVERNIGHT COURIER

                            ____________________________
                            ____________________________
                            Attn:
                            Telecopy No.: (___) ___-____

                            WIRE TRANSFER
                            State Street Bank and Trust Company
                            ABA No. 011-00-0028
                            for credit to State Street Bank and Trust
                            Company
                            Acct. No. 9903-990-1
                            Attn:        Corporate Trust Department
                            Reference:   U.S. Airways, Inc. 1998-1 EETC/
                                         N7__UW


                            U.S. MAIL

                            Two International Place, 4th Floor
                            Boston, Massachusetts 02110
                            Attn:         Corporate Trust Department
                                          Ruth A. Smith
                            Telecopy No.: (617) 664-5371


                            OVERNIGHT COURIER
                            ____________________________
                            ____________________________
                            Attn:_________________________
                            Telecopy No.:     (___) ___ - ____
Subordination Agent
and Pass Through
Trustees:



                                SCHEDULE II

                                COMMITMENTS


     PERCENTAGE OF
      PURCHASERS               INTEREST RATE
     LESSOR'S COST             AND MATURITY                     PURCHASE PRICE
     -------------             -------------                    --------------

   US Airways, Inc.
  Pass Through Trust:

        1998-1A            _____% Series A Secured                $__________
       _______%            Certificates due -----, ----

        1998-1B            _____% Series B Secured                $__________
       _______%            Certificates due  -----, ----

        1998-1C            _____% Series C Secured                $__________
        ______%            Certificates due -----, ----




                                SCHEDULE III

                       PASS THROUGH TRUST AGREEMENTS

      Pass Through Trust Agreement, dated as of December 4, 1998, between
      US Airways, Inc. and State Street Bank and Trust Company, as
      supplemented by Trust Supplement No. 1998-1A, dated as of December
      14, 1998, as supplemented by Trust Supplement No. 1998-1B, dated as
      of December 14, 1998, and as supplemented by Trust Supplement No.
      1998-1C, dated as of December 14, 1998.



                                 EXHIBIT A
                         TO PARTICIPATION AGREEMENT

                                  (N7__UW)

                  SCHEDULE OF COUNTRIES FOR REREGISTRATION


                  Australia               Malta
                  Austria                 Mexico
                  Bahamas                 Netherlands
                  Belgium                 New Zealand
                  Bermuda                 Norway
                  Brazil                  People's Republic of China
                  Canada                  Philippines
                  Denmark                 Portugal
                  Finland                 Republic of China (Taiwan)*
                  France                  Singapore
                  Germany                 South Korea
                  Grenada                 Spain
                  Greece                  Sweden
                  Iceland                 Switzerland
                  India                   Thailand
                  Ireland                 Tobago
                  Italy                   Trinidad
                  Jamaica                 Turkey
                  Japan                   United Kingdom
                  Luxembourg              Venezuela
                  Malaysia

             *So long as on the date of registration such country and the
United States have diplomatic relations at least as good as those in effect
on the Delivery Date.


















                                              Owned Aircraft Form Definitions 
                                              N7__UW


                                                                    ANNEX A 


                                DEFINITIONS 
                                  (N7__UW) 

           The following terms shall have the following meanings for all
 purposes of the Operative Documents referred to below, unless otherwise
 defined in an Operative Document or the context thereof shall otherwise
 require and such meanings shall be equally applicable to both the singular
 and the plural forms of the terms herein defined.  In the case of any
 conflict between the provisions of this Annex A and the provisions of the
 main body of any Operative Document, the provisions of the main body of
 such Operative Document shall control the construction of such Operative
 Document. 

           Except as otherwise provided herein, all references to any
 agreement defined in this Annex A shall be deemed to include such agreement
 as the same may from time to time be amended, supplemented or otherwise
 modified in accordance with its terms and, where applicable, the terms of
 the other Operative Documents.  All references to statutes, rules and
 regulations shall be deemed to include all amendments, replacements and
 successors thereto unless otherwise specified herein. 

           "Acceptable Alternate Engine" means (i) a CFM International Model
 56-5 (or improved type) engine having not less than 1,500 cycles left
 before such engine's next scheduled maintenance overhaul or (ii) an engine
 of the same or another manufacturer suitable for use on the Airframe and
 having a value and utility equal to or greater than a CFM Model 56-5 type
 engine, assuming such engine is in the condition required by the Lease. 

           "Actual Knowledge" means actual knowledge of a Responsible
 Officer in the Corporate Trust Office of the Indenture Trustee. 

           "Additional Insured" means the Indenture Trustee, the Pass
 Through Trustee, the Liquidity Provider, Owner in its capacity as lessor
 under any Lease, and each of their respective Affiliates, successors and
 permitted assigns, and the respective directors, officers, employees and
 agents of the foregoing. 

           "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. 

           "AIFS" means Airbus Industrie Financial Services, a corporation
 formed under the laws of Ireland. 

           "Aircraft" means the Airframe to be subject to the Lien of the
 Indenture (or any airframe from time to time substituted for such Airframe
 pursuant to Section 5.06 of the Indenture) together with the two Engines
 initially subject to the Lien of the Indenture (or any engine substituted
 for either of such Engines pursuant to the terms of the Indenture), in each
 case as specified in the applicable Indenture Supplement, 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 aircraft (except Engines or
 engines from time to time installed thereon) specified in the initial
 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 Section 5.06 of the 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); 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 subject to the Lien of the Indenture in substitution
 for the Airframe pursuant to the applicable provisions of the Lease, the
 replaced Airframe shall cease to be an Airframe subject to the Lien of the
 Indenture; provided further that the Airframe shall not include Passenger
 Convenience Equipment. 

           "Amortization Amount" means, with respect to any Principal Amount
 Repayment Date, the amount set forth opposite such Date as the Principal
 Amount to be repaid on the Amortization Schedule. 

           "Amortization Schedule" means the amortization schedule for the
 Equipment Notes delivered pursuant to Section 2.02 of the Indenture.  

           "Applicable Rate" means as of any date the weighted average of
 the interest rates borne by the Equipment Notes then outstanding and, if no
 Equipment Notes 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
 Chase Manhattan, 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 Pittsburgh,
 Pennsylvania. 

           "Cash Equivalents" means (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 Corporation ("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 of 5% of such bank's capital and surplus.  

           "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 for such
 term 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. 

           "Class A Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class B Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class C Liquidity Provider" means ABN AMRO Bank, N.V., a bank
 organized under the laws of the Netherlands acting through its Chicago
 branch, or any successor thereto. 

           "Class C Purchase Agreement" means that certain Purchase
 Agreement, dated as of December 14, 1998, by and between Owner and AIFS. 

           "Class C Special Indemnity Event" means the existence of any
 condition or event which, pursuant to Section 3 of the Registration
 Agreement, requires US Airways, Inc. to pay liquidated damages to the US
 Airways Pass Through Trust 1998-C in accordance with such Section 3,
 subject to the last sentence of the first paragraph of Section 3 of the
 Registration Agreement. 

           "Code" means the Internal Revenue Code of 1986, as amended.   

           "Commitment" means the commitment pursuant to the Participation
 Agreement of a Pass Through Trustee to finance Owner's Cost for the
 Aircraft.  

           "Consent and Agreement" means the Consent and Agreement (N7__UW),
 dated as of the date of the Participation Agreement, executed by the
 Seller, as the same may be amended, modified or supplemented from time to
 time in accordance with the applicable provisions thereof. 

           "Continuous Stay Period" has the meaning specified for such term
 in Section 4.04(a) of the Indenture. 

           "Corporate Trust Office" means the principal office of the
 Indenture Trustee located at Two International Place, 4th Floor, 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 Owner, the Loan Participants and each Note Holder.  

           "Debt" means 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" means, with respect to any Series, the rate per annum
 specified for such Series under the heading "Interest Rate" in Schedule I
 to the  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.  

           "Delivery Date" means the date of the initial Indenture
 Supplement for the Aircraft.  

           "Delivery Notice" means the notice of delivery delivered pursuant
 to Section 2(c) of the Participation Agreement. 

           "Depositaries" means collectively, Credit Suisse First Boston,
 New York Branch and Citibank, N.A.  

           "Designated Interest Rate" has the meaning specified for such
 term in Section 2.02 of the Indenture. 

           "Dollars" and "$" mean the lawful currency of the United States
 of America. 

           "Enforcement Date" has the meaning specified for such term in
 Section 4.03 of the Indenture. 

           "Engine" means (i) each of the two CFM International 56-5 type
 engines listed by manufacturer's serial number in the initial 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 Acceptable Alternate Engine that may from time to time be
 substituted, pursuant to the terms of the Indenture, for either 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 there from;
 provided, however, that at such time as an engine shall be deemed part of
 the property leased under the Indenture in substitution for an Engine
 pursuant to the applicable provisions of the Indenture, the replaced Engine
 shall cease to be an Engine under the Indenture.  The term "Engines" means,
 as of any date of determination, all Engines then subject to the Lien of
 the Indenture.  

           "Equipment Note Holder" has the meaning specified for such term
 in Section 2.07 of the Indenture. 

           "Equipment Notes" means and include any Equipment Notes issued
 under the Indenture, and issued in exchange therefor or replacement
 thereof.  

           "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 for such term  in
 Section 4.02 of the Indenture. 

           "Event of Loss" means, with respect to the Aircraft, Airframe or
 any Engine, 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 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 for a period in excess of one hundred eighty
 (180) days or, if earlier, the expiration of the Term; (iv) the requisition
 for use of such property by any governmental authority (other than a
 requisition for use by the United States Government or any government of
 registry of the Aircraft or any agency or instrumentality thereof) that
 shall have resulted in the loss of possession of such property by Owner (or
 any Lessee) for a period in excess of one hundred eighty (180) consecutive
 days or, if earlier, the expiration of the Term; (v) the requisition for
 use by the United States Government or any government of registry of the
 Aircraft or any instrumentality or agency thereof, which shall have
 occurred during the Basic Term (or any Renewal Term) and shall have
 continued for a period of thirty (30) days beyond the Term; (vi)
 condemnation, confiscation, requisition or taking of title of the Aircraft
 or the Airframe for more than thirty (30) days, or if earlier, the
 expiration of the Term; (vii) 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 one
 hundred eighty (180) consecutive days, unless Owner (or Lessee) 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 Owner
 (or such Lessee), but in any event an "Event of Loss" shall occur if such
 "grounding" extends for a period of more than three hundred sixty (360)
 days (or, if earlier, the expiration of the Term); provided that no Event
 of Loss shall be deemed to occur if such "grounding" is applicable to
 Owner's entire fleet of A319 aircraft and Owner, prior to the expiration of
 one year from the prohibition of such use, 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, on
 a non-discriminatory basis, all steps which are necessary or desirable to
 permit the normal use of the Aircraft by Owner (or such Lessee), but in any
 event an "Event of Loss" shall be deemed to have occurred if such use shall
 have been prohibited for a period of two consecutive years or such use
 shall be prohibited at the expiration of the Term; and (viii) with respect
 to an Engine only, any divestiture of title to or interest in an Engine or
 any event with respect to an Engine that is deemed to be an Event of Loss
 with respect to such Engine pursuant to Section 7(b) of the Lease.  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" means all liabilities, obligations, losses, damages,
 settlements, penalties, claims, actions, suits, costs, expenses and
 disbursements (including, without limitation, reasonable fees and
 disbursements of legal counsel, accountants, appraisers, inspectors or
 other professionals and reasonable costs of investigation). 

           "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. 

           "Federal Funds Rate"  means a fluctuating interest rate per annum
 in effect from time to time, which rate per annum shall at all times be
 equal to 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 State Street from three Federal funds brokers of
 recognized standing selected by it. 

           "Foreign Air Carrier" means any air carrier which is not a U.S.
 Air Carrier and which performs, or contracts for the performance of,
 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 or any Permitted Foreign Air Authority. 

           "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.   

           "Indemnitee" means (i)  the Indenture Trustee,  (ii) the Loan
 Participants and each other Note Holder, (iii) the Subordination Agent,
 (iv) the Liquidity Provider, (v) the Pass Through Trustees, (vi) each
 Affiliate of the Persons described in clauses (i) through (v), inclusive,
 (vii) the respective directors, officers, employees, agents and servants of
 each of the Persons described in clauses (i) through (vi), inclusive, and
 (viii) the successors and permitted assigns of the Persons described in
 clauses (i) through (vii), inclusive. 

           "Indemnity Agreements" means each of (i) that certain Indemnity
 Agreement, dated as of December 14, 1998, between Citibank, N.A. and Owner
 and  (ii) that certain Indemnity Agreement, dated as of December 14, 1998,
 between Credit Suisse First Boston, New York Branch, and Owner. 

           "Indenture" means that certain Indenture and Security Agreement
 (N7__UW), dated as of the date of the Participation Agreement, between
 Owner and the Indenture Trustee, as it may from time to time be
 supplemented or amended as therein provided, including supplementing by the
 Indenture Supplement pursuant to the Indenture. 

           "Indenture Agreements" means the Participation Agreement, the
 Purchase Agreement, the Purchase Agreement Assignment, the Consent and
 Agreement and any other contract, agreement or instrument from time to time
 assigned or pledged under the Indenture.  

           "Indenture Estate" means all estate, right, title and interest of
 the Indenture Trustee in and to the properties referred to in the Granting
 Clause of the Indenture. 

           "Indenture Excess Amount" has the meaning specified for such term
 in Section 2.03(b) of the Indenture. 

           "Indenture Indemnitees" means (i) State Street and the Indenture
 Trustee, (ii) each separate or additional trustee appointed pursuant to the
 Indenture, (iii) the Subordination Agent, (iv) the Liquidity Provider, (v)
 each Pass Through Trustee, and (vi) each of the respective directors,
 officers, employees, agents and servants of each of the Persons described
 in clauses (i) through (v), inclusive. 

           "Indenture Supplement"  means a supplement to the Indenture,
 substantially in the form of Exhibit A to the Indenture, which shall
 particularly describe the Aircraft, and any Replacement Airframe and
 Replacement Engine included in the property subject to the Lien of the
 Indenture. 

           "Indenture Trustee" means State Street Bank and Trust Company, a
 Massachusetts trust company, not in its individual capacity, but solely as
 Indenture Trustee, and any entity which may from time to time be acting as
 indenture trustee under the Indenture. 

           "Indenture Trustee Documents" means the Participation Agreement
 and the Indenture and any other agreements between the Indenture Trustee
 and any other party to the Participation Agreement relating to the
 Transactions, delivered on the Delivery Date. 

           "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 6 of the
 Participation Agreement pursuant to said Section 6, 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 Indenture Estate
 or the Operative Documents other than a transfer of the Aircraft pursuant
 to Article IV or V of the Indenture. 

           "Intercreditor Agreement" means that certain Intercreditor
 Agreement, dated as of the date of the Indenture, among the Pass Through
 Trustees, the Liquidity Provider and the Subordination Agent. 

           "Law" means (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" means any sublease permitted by the terms of Section
 7(b)(x) of the Lease. 

           "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 7.03(c) of the
 Indenture. 

           "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 ABN AMRO Bank, N.V., a bank organized
 under the laws of the Netherlands acting through its Chicago branch,  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 Note 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 Note Holders" as of a particular date of
 determination means the holders of more than a majority in aggregate unpaid
 Principal Amount of all Equipment Notes outstanding as of such date
 (excluding any Equipment Notes held by Owner or any Affiliate thereof). 

           "Make-Whole Amount" means, with respect to any Equipment Note,
 the amount (as determined by an independent investment banker selected by
 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 Equipment Note 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 Equipment Note plus accrued interest.  For
 purposes of determining the Make-Whole Amount, "Treasury Yield" means, at
 the time of determination, 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 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
 and (B) the other maturing as close as possible to, but later than, the
 Average Life Date, 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 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.  "Average Life Date" means, for each Equipment Note to be
 redeemed, the date which follows the redemption date by a period equal to
 the Remaining Weighted Average Life at the redemption date of such
 Equipment Note.  

           "Manufacturer" means Airbus Industrie G.I.E., a groupement
 d'interet economique established under Ordonnance No. 67-821 dated
 September 23, 1967 of the Republic of France, and its successors and
 assigns. 

           "Manufacturer Documents" means the Purchase Agreement and the
 Consent and Agreement. 

           "Mortgaged Property" has the meaning specified for such term in
 Section 3.03 of the Indenture. 

           "Multiplier" means (i) on any date when no Class C Special
 Indemnity Event is continuing , 0.00, (ii) on each day during the first
 ninety (90)-day period immediately following the occurrence of a Class C
 Special Indemnity Event, 0.0025, and (iii) thereafter, on each day during
 each subsequent ninety (90)-day period for so long as such Class C Special
 Indemnity Event exists, the Multiplier in effect for the immediately
 preceding ninety (90)-day period plus 0.0025; provided, that (a)
 notwithstanding the foregoing, the maximum Multiplier shall be 0.01, and
 (b) the Multiplier shall reset after such Class C Special Indemnity Event
 has ceased or no longer exists and clause (i) shall apply again to any
 subsequent Class C Special Indemnity Event. 

           "Net Interest and Related Charges" has the meaning specified for
 such term in Section 2.02 of the Indenture. 

           "Note Holder" means any holder from time to time of one or more
 Equipment Notes. 

           "Note Purchase Agreement" means the Note Purchase Agreement dated
 as of the Pass Through Trust Closing Date among Owner, the Pass Through
 Trustee for the Class A, Class B and Class C Pass Through Trusts, the
 Subordination Agent, First Security Bank, National Association, as Escrow
 Agent, and State Street Bank and Trust Company, as Paying Agent. 

           "Obsolete Parts" has the meaning specified for such term in
 Section 7.03(c) of the Indenture. 

           "Operative Documents" means, collectively, the Participation
 Agreement,  the Indenture, the Indenture Supplement covering the Aircraft,
 the Equipment Notes, the Purchase Agreement (insofar as it relates to the
 Aircraft), the Purchase Agreement Assignment and the Consent and Agreement
 (each, an "Operative Document"). 

           "Operative Indentures" means each of the indentures under which
 notes have been issued and purchased by the Pass Through Trustees. 

           "Owner" means US Airways, Inc., a Delaware corporation. 

           "Participants" means the Loan Participants (each individually, a
 "Participant"). 

           "Participation Agreement" means that certain Participation
 Agreement (N7__UW), dated as of                           , 199   in, among
 the Subordination Agent, the Indenture Trustee, Owner and the Pass Through
 Trustee, 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. 

           "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 Owner from a third
 party 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 such
 items remain subject to the Lien of the  Indenture as  after removal
 therefrom; provided that "Parts" shall not include Passenger Convenience
 Equipment.  

           "Pass Through Certificates" means the pass through certificates
 to be issued by the Pass Through Trustee in connection with the
 Transactions.  

           "Pass Through Documents" means the Participation Agreement, the
 Pass Through Trust Agreements and the Intercreditor Agreement. 

           "Pass Through Indemnitees" means (i) the Subordination Agent, the
 Liquidity Provider and the Pass Through Trustee, (ii) each Affiliate of a
 Person described in the preceding clause (i), (iii) the respective
 directors, officers, employees, agents and servants of each of the Persons
 described in the preceding clauses (i) and (ii), and (iv) the successors
 and permitted assigns of the Persons described in the preceding clauses
 (i), (ii) and (iii). 

           "Pass Through Trust" means, collectively, the three separate
 grantor trusts set forth in Schedule III to the Participation Agreement
 created, pursuant to the Pass Through Trust Agreements and each of the Pass
 Through Trust Supplements set forth in Schedule III to the Participation
 Agreement, to facilitate certain of the transactions contemplated by the
 Operative Documents. 

           "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 Trust Closing Date" means December 14, 1998. 

           "Pass Through Trustee" means State Street Bank and Trust Company,
 a Massachusetts trust company, 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. 

           "Passenger Convenience Equipment" means available components or
 systems installed on or affixed to the Airframe that are used to provide
 individual telecommunications or electronic entertainment to passengers
 aboard the Aircraft. 

           "Past Due Rate" means a rate per annum equal to 1% over the Debt
 Rate. 

           "Payment Date" means each January 30 and July 30, commencing on
 ________  30, ____ (or, if any such day is not a Business Day, the
 immediately succeeding Business Day) until the Equipment Notes have been
 paid in full.  

           "Permitted Foreign Air Authority" means 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 Rijflauchtraatdienst 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). 

           "Permitted Lien" means any Lien referred to in clauses (i)
 through (viii) of Section 7.01 of the Indenture. 

           "Permitted Lessee" means any entity domiciled in a country listed
 in Exhibit C to the Indenture as in effect from time to time and as may be
 modified in accordance with Section 7(d) of the Participation Agreement. 

           "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 Equipment Note, means the
 stated original principal amount of such Equipment Note and, with respect
 to all Equipment Notes, means the aggregate stated original principal
 amounts of all Equipment Notes. 

           "Principal Amount Repayment Date" means each Payment Date on
 which any portion of the Principal Amount is due and payable in accordance
 with the Amortization Schedule. 

           "Purchase Agreement" means the Sale and Purchase Agreement, dated
 as of October 31, 1997, between the Seller and US Airways Group, Inc., as
 the same has been assigned to Owner, relating to the purchase by 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. 

           "Purchase Agreement Assignment" means the Purchase Agreement
 Assignment (N7  UW), dated as of the date of the Participation Agreement,
 between Owner and the Indenture Trustee, as the same may be amended,
 supplemented or modified from time to time, with a form of Consent and
 Agreement to be executed by the Seller attached thereto. 

           "Purchasers" means the Pass Through Trustees under each Pass
 Through Trust Agreement. 

           "QIB" has the meaning specified for such term in Section 2.08 of
 the Indenture. 

           "Registration Agreement" means the Registration Agreement dated
 December 14, 1998 by Owner, and confirmed and accepted by AIFS, in respect
 of the 6.82% Pass Through Certificates, Series 1998-1, Class C, as such
 Registration Agreement may be amended, modified and supplemented from time
 to time in accordance with the provisions thereof. 

           "Related Indemnitee Group" means, with respect to any Indemnitee,
 any officer, director, servant, employee, agent or Affiliate thereof.  

           "Remaining Weighted Average Life" of a Equipment Note, at the
 redemption date of such Equipment Note, means 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 Equipment Note, 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 Equipment Note. 

           "Replacement Airframe" means any airframe substituted for the
 Airframe pursuant to Section 5.06 of the Indenture. 

           "Replacement Engine" means any engine substituted for an Engine
 pursuant to Section 5.06 of the Indenture. 

           "Responsible Officer" means a responsible officer in the
 Corporate Trust Office of the Indenture Trustee. 

           "Scheduled Delivery Date" has the meaning specified for such term
 in Section 2(f) of the Participation Agreement. 

           "Secured Obligations" has the meaning specified for such term in
 the Granting Clause of the Indenture. 

           "Securities Act" means the Securities Act of 1933, as amended.  

           "Seller" means AVSA, S.A.R.L., a societE a responsabilite limitee
 organized and existing under the laws of the Republic of France. 

           "Senior Holder" has the meaning specified for such term in
 Section 2.15(c) of the Indenture. 

           "Series A" or "Series A Equipment Notes" means Equipment Notes
 issued and designated as "Series A" under the Indenture, in the Principal
 Amount and maturities and bearing interest as specified in Schedule I to
 the Indenture under the heading "Series A." 

           "Series B" or "Series B Equipment Notes" means Equipment Notes
 issued and designated as "Series B" under the Indenture, in the Principal
 Amount and maturities and bearing interest as specified in Schedule I to
 the Indenture under the heading "Series B." 

           "Series C" or "Series C Equipment Notes" means Equipment Notes
 issued and designated as "Series C" under the Indenture, in the Principal
 Amount and maturities and bearing interest as specified in Schedule I to
 the 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 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. 

           "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, recording charges and assessments of any
 kind whatsoever that are in the nature of taxes or other governmental
 charges including interest, penalties and additions to tax  (each,
 individually a "Tax"). 

           "Transaction Expenses" means:  all of the reasonable out-of-
 pocket costs, fees and expenses incurred by Owner, 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 Pass
 Through Documents, the Intercreditor Agreement, the Liquidity Facilities
 and the Underwriting Agreement (except, in each case, as otherwise provided
 therein) including, without limitation: 

      (a)  the reasonable and actual fees, expenses and disbursements of (A)
           Bingham, Dana & Gould LLP, special counsel for the Pass Through
           Trustee, the Subordination Agent and the Indenture Trustee, (B)
           Shearman & Sterling, special counsel for the Underwriters, and
           (C) Crowe & Dunlevy, P.C., special counsel in Oklahoma City,
           Oklahoma and (D) Simpson Thacher & Bartlett, special counsel to
           AIFS;

      (b)  the initial fee and reasonable and actual disbursements of the
           Indenture Trustee under the Indenture;  

      (c)  the initial fees and expenses of the Liquidity Provider, the Pass
           Through Trustee and the Subordination Agent;  

      (d)  underwriting fees and commissions;

      (e)  the fees and expenses with respect to the appraisal of the
           Aircraft;

      (f)  the fees, expenses and disbursements of Skadden, Arps, Slate,
           Meagher & Flom LLP and its affiliates, special counsel for Owner;

      (g)  the costs of filing and recording documents with the FAA and
           filing Uniform Commercial Code statements in the United States;

      (h)  the reasonable fees, expenses and disbursements of special
           counsel to the Liquidity Provider; 

      (i)  the expenses of the Depositaries payable under Section 10(a) of
           each Indemnity Agreement; and 

      (j)  the reasonable fees, expenses and disbursements of, special
           counsel to the Seller and the Manufacturer.

           "Transactions" means the transactions contemplated by the
 Participation Agreement and the other Operative Documents. 

           "Transportation Code" 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. 

           "Underwriters" means Morgan Stanley & Co. Incorporated, Salomon Smith
 Barney Inc., Lehman Brothers Inc. and Credit Suisse First Boston Corporation. 

           "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 Transportation Code, 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 Owner (or any
 Lessee) possessing all current certificates and licenses that would be
 required under the Transportation Code, 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 Owner (or any Lessee)) and (ii) shall be
 maintained by Owner (or any Lessee) in accordance with its normal
 maintenance practices. 








EXHIBIT 4(a)(xix)
                                                    Owned Aircraft Indenture 
                                                                      N7__UW



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


                        INDENTURE AND SECURITY AGREEMENT
                                    (N7__UW) 

                       Dated as of __________  __, 199_ 

                                     Between

                                 US AIRWAYS, INC.  

                                      Owner

                                       and

                       STATE STREET BANK AND TRUST COMPANY

                                Indenture Trustee


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


                            EQUIPMENT NOTES COVERING
                          ONE AIRBUS A319-___ AIRCRAFT  
                      BEARING U.S. REGISTRATION MARK N7__UW 
                            OWNED BY US AIRWAYS, INC. 


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



                             TABLE OF CONTENTS 

                                  ARTICLE I
                                 DEFINITIONS . . . . . . . . . . . . . . . 5

 SECTION 1.01.  Definitions  . . . . . . . . . . . . . . . . . . . . . . . 5

                                 ARTICLE II
                             THE EQUIPMENT NOTES . . . . . . . . . . . . . 6

 SECTION 2.01.  Form of Equipment Notes  . . . . . . . . . . . . . . . . . 6
 SECTION 2.02.  Issuance and Terms of Equipment Notes  . . . . . . . . .  11
 SECTION 2.03.  [Reserved] . . . . . . . . . . . . . . . . . . . . . . .  13
 SECTION 2.04.  Method of Payment  . . . . . . . . . . . . . . . . . . .  13
 SECTION 2.05.  Application of Payments  . . . . . . . . . . . . . . . .  16
 SECTION 2.06.  Termination of Interest in Indenture Estate  . . . . . .  17
 SECTION 2.07.  Registration, Transfer and Exchange of Equipment Notes .  17
 SECTION 2.08.  Mutilated, Destroyed, Lost or Stolen Equipment 
                Notes . . . . . . . . . . . . . . . . . . . . . . . . .   19 
 SECTION 2.09.  Payment of Expenses on Transfer; Cancellation  . . . . .  19
 SECTION 2.10.  Mandatory Redemptions of Equipment Notes . . . . . . . .  20
 SECTION 2.11.  Voluntary Redemptions of Equipment Notes . . . . . . . .  20
 SECTION 2.12.  Redemptions; Notice of Redemption  . . . . . . . . . . .  20
 SECTION 2.13.  [Reserved] . . . . . . . . . . . . . . . . . . . . . . .  21
 SECTION 2.14.  [Reserved] . . . . . . . . . . . . . . . . . . . . . . .  21
 SECTION 2.15.  Subordination  . . . . . . . . . . . . . . . . . . . . .  21

                                 ARTICLE III
                  RECEIPT, DISTRIBUTION AND APPLICATION OF 
                      INCOME FROM THE INDENTURE ESTATE  . . . . . . . .   22

 SECTION 3.01.  Basic Distributions. . . . . . . . . . . . . . . . . . .  22
 SECTION 3.02.  Event of Loss; Optional Redemption . . . . . . . . . . .  22
 SECTION 3.03.  Payments After Event of Default  . . . . . . . . . . . .  23
 SECTION 3.04.  Certain Payments . . . . . . . . . . . . . . . . . . . .  26
 SECTION 3.05.  Other Payments . . . . . . . . . . . . . . . . . . . . .  26
 SECTION 3.06.  Payments to Owner  . . . . . . . . . . . . . . . . . . .  27

                                 ARTICLE IV
                   CERTAIN COVENANTS OF OWNER; EVENTS OF 
                   DEFAULT; REMEDIES OF INDENTURE TRUSTEE . . . . . . .   27

 SECTION 4.01.  Certain Covenants of Owner . . . . . . . . . . . . . . .  27
 SECTION 4.02.  Event of Default . . . . . . . . . . . . . . . . . . . .  27
 SECTION 4.03.  [Reserved] . . . . . . . . . . . . . . . . . . . . . . .  29
 SECTION 4.04.  Remedies . . . . . . . . . . . . . . . . . . . . . . . .  29
 SECTION 4.05.  Return of Aircraft, Etc  . . . . . . . . . . . . . . . .  31
 SECTION 4.06.  Remedies Cumulative  . . . . . . . . . . . . . . . . . .  33
 SECTION 4.07.  Discontinuance of Proceedings  . . . . . . . . . . . . .  33
 SECTION 4.08.  Waiver of Past Defaults  . . . . . . . . . . . . . . . .  33
 SECTION 4.09.  Appointment of Receiver  . . . . . . . . . . . . . . . .  34
 SECTION 4.10.  Indenture Trustee Authorized to Execute Bills of 
                Sale, Etc . . . . . . . . . . . . . . . . . . . . . . .   34
 SECTION 4.11.  Rights of Note Holders to Receive Payment  . . . . . . .  35

                                  ARTICLE V
                       DUTIES OF THE INDENTURE TRUSTEE . . . . . . . . .  35

 SECTION 5.01.  Notice of Event of Default . . . . . . . . . . . . . . .  35 
 SECTION 5.02.  Action upon Instructions; Certain Rights and 
                Limitations . . . . . . . . . . . . . . . . . . . . . .   36
 SECTION 5.03.  Indemnification  . . . . . . . . . . . . . . . . . . . .  36
 SECTION 5.04.  No Duties Except as Specified in Indenture or 
                Instructions . . . . . . . . . . . . . . . . . . . . . .  37
 SECTION 5.05.  No Action Except Under Indenture or 
                Instructions . . . . . . . . . . . . . . . . . . . . . .  37
 SECTION 5.06.  Replacement Airframes and Replacement Engines  . . . . .  38
 SECTION 5.07.  Indenture Supplements for Replacements . . . . . . . . .  40
 SECTION 5.08.  Effect of Replacement  . . . . . . . . . . . . . . . . .  40
 SECTION 5.09.  Investment of Amounts Held by Indenture Trustee  . . . .  41

                                 ARTICLE VI
                            THE INDENTURE TRUSTEE  . . . . . . . . . . .  41

 SECTION 6.01.  Acceptance of Trusts and Duties  . . . . . . . . . . . .  41
 SECTION 6.02.  Absence of Duties  . . . . . . . . . . . . . . . . . . .  42
 SECTION 6.03.  No Representations or Warranties as to Aircraft 
                or Documents . . . . . . . . . . . . . . . . . . . . . .  42 
 SECTION 6.04.  No Segregation of Monies; No Interest  . . . . . . . . .  43
 SECTION 6.05.  Reliance; Agreements; Advice of Counsel  . . . . . . . .  43
 SECTION 6.06.  [Reserved] . . . . . . . . . . . . . . . . . . . . . . .  44
 SECTION 6.07.  Compensation . . . . . . . . . . . . . . . . . . . . . .  44
 SECTION 6.08.  Instructions from Note Holders . . . . . . . . . . . . .  44

                                 ARTICLE VII
                      OPERATING COVENANTS OF THE OWNER  . . . . . . . .   45

 SECTION 7.01.  Liens  . . . . . . . . . . . . . . . . . . . . . . . . .  45 
 SECTION 7.02.  Registration, Maintenance, Operation and 
                Registration; Possession and Leases; Insignia  . . . . .  45 
 SECTION 7.03.  Replacement and Pooling of Parts; Alterations, 
                Modifications and Additions  . . . . . . . . . . . . . .  51 
 SECTION 7.04.  Insurance  . . . . . . . . . . . . . . . . . . . . . . .  53
 SECTION 7.05.  Inspection . . . . . . . . . . . . . . . . . . . . . . .  54
 SECTION 7.06.  Filings; Delivery of Financial Statements  . . . . . . .  55

                                ARTICLE VIII
                INDEMNIFICATION OF INDENTURE TRUSTEE BY OWNER  . . . . .  56

 SECTION 8.01.  Scope of Indemnification . . . . . . . . . . . . . . . .  56 

                                 ARTICLE IX
                       SUCCESSOR AND SEPARATE TRUSTEES . . . . . . . . .  57

 SECTION 9.01.  [Reserved.]  . . . . . . . . . . . . . . . . . . . . . .  57 
 SECTION 9.02.  Resignation of Indenture Trustee; Appointment of
                Successor.  . . . . . . . . . . . . . . . . . . . . . .   57 
 SECTION 9.03.  Appointment of Additional and Separate Trustees  . . . .  59

                                  ARTICLE X
                SUPPLEMENTS AND AMENDMENTS TO THIS INDENTURE
                            AND OTHER DOCUMENTS   . . . . . . . . . . .   61

 SECTION 10.01. Instructions of Majority; Limitations. . . . . . . . . .  61
 SECTION 10.02. Trustees Protected.  . . . . . . . . . . . . . . . . . .  63
 SECTION 10.03. Documents Mailed to Note Holders.  . . . . . . . . . . .  63
 SECTION 10.04. No Request Necessary for Indenture Supplement. . . . . .  63

                                 ARTICLE XI
                                MISCELLANEOUS  . . . . . . . . . . . . .  63

 SECTION 11.01. Termination of Indenture.  . . . . . . . . . . . . . . .  63
 SECTION 11.02. No Legal Title to Indenture Estate in Note Holders.  . .  64
 SECTION 11.03. Sale of Aircraft by Indenture Trustee Is Binding.  . . .  64
 SECTION 11.04. Indenture for Benefit of Owner, Indenture  . . . . . . .  65
 SECTION 11.05. Notices.   . . . . . . . . . . . . . . . . . . . . . . .  65 
 SECTION 11.06. Severability.  . . . . . . . . . . . . . . . . . . . . .  65
 SECTION 11.07. No Oral Modification or Continuing Waivers.  . . . . . .  66
 SECTION 11.08. Successors and Assigns.  . . . . . . . . . . . . . . . .  66
 SECTION 11.09. Headings.  . . . . . . . . . . . . . . . . . . . . . . .  66
 SECTION 11.10. Normal Commercial Relations.   . . . . . . . . . . . . .  66
 SECTION 11.11. Governing Law; Counterpart Form.   . . . . . . . . . . .  67
 SECTION 11.12. Voting By Note Holders.  . . . . . . . . . . . . . . . .  67
 SECTION 11.13. Bankruptcy.  . . . . . . . . . . . . . . . . . . . . . .  67


 EXHIBIT A  INDENTURE SUPPLEMENT  . . . . . . . . . . . . . .  . EXHIBIT A-1 

 EXHIBIT B  INSURANCE . . . . . . . . . . . . . . . . . . . .  . EXHIBIT B-1 


 SCHEDULE I     SERIES A . . . . . . . . . . . . . . . . . . .  SCHEDULE I-2 
                SERIES B . . . . . . . . . . . . . . . . . . .  SCHEDULE I-3 
                SERIES C . . . . . . . . . . . . . . . . . . .  SCHEDULE I-4 

 SCHEDULE II    PASS THROUGH TRUST AGREEMENT AND PASS 
                THROUGH TRUST SUPPLEMENTS  . . . . . . . . . . SCHEDULE II-1



                     INDENTURE AND SECURITY AGREEMENT  
                                  (N7__UW) 

            INDENTURE AND SECURITY AGREEMENT (N7__UW), dated as of
 _________  __, 199_ ("Indenture") between US AIRWAYS, INC., a Delaware
 corporation (together with its successors and permitted assigns, "Owner"),
 and STATE STREET BANK AND TRUST COMPANY, a Massachusetts trust company, as
 Indenture Trustee hereunder (together with its successors hereunder, the
 "Indenture Trustee"). 

                            W I T N E S S E T H 

                WHEREAS, the parties desire by this Indenture, among other
 things, (i) to provide for the issuance by Owner to the Pass Through
 Trustees (or their designee) of the Equipment Notes evidencing the
 participation of the Pass Through Trustees in the payment of Owner's Cost
 for the Aircraft, as provided in the Participation Agreement and (ii) to
 provide for the assignment, mortgage and pledge by Owner to the Indenture
 Trustee, as part of the Indenture Estate hereunder, among other things, of
 all of Owner's right, title and interest in and to the Aircraft, as
 security for, among other things, Owner's obligations to the Indenture
 Trustee, for the ratable benefit and security of the Note Holders, subject
 to Section 2.15 and Article III hereof; 

            WHEREAS, all things have been done to make the Equipment Notes,
 when executed by Owner and authenticated and delivered by the Indenture
 Trustee hereunder, the valid, binding and enforceable obligations of Owner;
 and 

            WHEREAS, all things necessary to make this Indenture the valid,
 binding and legal obligation of 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 INDENTURE AND SECURITY AGREEMENT
 WITNESSETH, that, to secure (i) the prompt payment of the Principal Amount
 of, interest on, Make-Whole Amount, if any, and all other amounts due with
 respect to, all Equipment Notes from time to time outstanding hereunder and
 (ii) the performance and observance by Owner of all the agreements,
 covenants and provisions herein and in the Participation Agreement and the
 Equipment Notes contained, for the benefit of the Note Holders, the Loan
 Participants and each of the Indenture Indemnitees and the prompt payment
 of all amounts from time to time owing hereunder and under the
 Participation Agreement to the Note Holders, the Loan Participants or any
 Indenture Indemnitee by Owner (the "Secured Obligations") 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 Equipment Notes by the holders thereof, and for other
 good and valuable consideration the receipt and adequacy whereof are hereby
 acknowledged, 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 Note Holders, a first priority security interest in and
 mortgage lien on all right, title and interest of Owner in, to and under
 the following described property, rights and privileges, to wit: 

            (1)  the Aircraft (including the Airframe and the Engines and
 all replacements thereof and substitutions therefor to which Owner shall
 from time to time acquire title as provided herein), all as more
 particularly described in the Indenture Supplement executed and delivered
 with respect to the Aircraft or any such replacements or substitutions
 therefor, as provided in this Indenture; 

            (2)  the Purchase Agreement (to the extent specified in the
 Purchase Agreement Assignment), the Purchase Agreement Assignment, the
 Consent and Agreement and the Bill of Sale; 

            (3)  all rents, issues, profits, revenues and other income of
 the property subjected or required to be subjected to the Lien of this
 Indenture;  

            (4)  all insurance and requisition proceeds with respect to the
 Aircraft, including but not limited to the insurance required under Section
 7.04; 

            (5)  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  

            (6)  all proceeds of the foregoing. 

            Concurrently with the delivery hereof, Owner is delivering to
 the Indenture Trustee 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 Note Holders and the Indenture Indemnitees
 except as provided in Section 2.15 and Article III hereof without any
 preference, distinction or priority of any one Equipment Note 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 (6) inclusive above, subject to the terms and
 provisions set forth in this Indenture. 

            It is expressly agreed that anything herein contained to the
 contrary notwithstanding, 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 Indenture Indemnitees, Indenture Trustee and the Note 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
 Indemnitees, Indenture Trustee or the Note Holders be required or obligated
 in any manner to perform or fulfill any obligations of 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. 

            Owner does hereby constitute the Indenture Trustee the true and
 lawful attorney of 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 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 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 Owner  hereunder,
 during the continuance of any Event of Default under this 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 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 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 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 Owner to
 any Person beyond those obligations and liabilities specifically set forth
 in this Indenture and in the other Operative Documents.  Owner 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 Indenture Estate, for distribution by the Indenture Trustee pursuant to
 this Indenture. 

            Owner agrees that at any time and from time to time, upon the
 written request of the Indenture Trustee, 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.  

            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
 Section 11.01 hereof, any of its right, title or interest hereby assigned,
 to anyone other than the Indenture Trustee, and that it will not, except as
 otherwise provided in this Indenture, (i) enter into any agreement amending
 or supplementing any Indenture Agreement, (ii) execute any waiver or
 modification of, or consent under, the terms of, or exercise any rights,
 powers or privileges under, any Indenture Agreement, (iii) settle or
 compromise any claim arising under any Indenture Agreement or (iv) 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. 

            Owner does hereby further agree that it will not without the
 written consent of the Indenture 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 Owner shall ipso facto, and without any further conveyance, assignment
 or act on the part of Owner 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 Owner contained in the foregoing
 paragraphs. 

            Owner does hereby agree that it will not violate any covenant
 or agreement made by it therein, herein or in any of the other Owner
 Documents.  

            IT IS HEREBY COVENANTED AND AGREED by and between the parties
 hereto as follows: 


                                  ARTICLE I

                                 DEFINITIONS

         SECTION 1.01.  Definitions.  For all purposes of this Indenture,
 capitalized terms used but not defined herein shall have the respective
 meanings set forth or incorporated by reference, and shall be construed and
 interpreted in the manner described, in Annex A.  


                                 ARTICLE II

                             THE EQUIPMENT NOTES

         SECTION 2.01.  Form of Equipment Notes.

         The Equipment Notes shall be substantially in the form set forth
 below: 

    THIS EQUIPMENT NOTE 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 EQUIPMENT NOTE MAY
    NOT BE SOLD UNLESS EITHER REGISTERED UNDER THE ACT AND SUCH
    APPLICABLE STATE LAWS OR AN EXEMPTION FROM SUCH REGISTRATIONS IS
    AVAILABLE.   

    US AIRWAYS, INC. SERIES [___] NON-RECOURSE EQUIPMENT NOTE DUE [___]
    ISSUED IN CONNECTION WITH THE AIRBUS A-       AIRCRAFT BEARING UNITED
    STATES REGISTRATION NUMBER _____.   

 No.____           Date:  [______,__]       $________________ 


    INTEREST RATE                           MATURITY DATE  

       [____]                              [___________,_____]  

         US AIRWAYS, INC., 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 Equipment Note shall be payable on the
 dates and in the installments as set forth in Schedule I hereto. Accrued
 but unpaid interest shall be due and payable in semi-annual installments
 commencing _______ __, ____, and thereafter on _______ __  and ______ __ of
 each year, to and including _______, _____.  Notwithstanding the foregoing,
 the final payment made on this Equipment Note 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 Equipment
 Note.  Notwithstanding anything to the contrary contained herein, if any
 date on which a payment under this Equipment Note 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 if 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. 

         For purposes hereof, the term "Indenture" means the Indenture and
 Security Agreement (N7__UW), dated as of ___________ __, 199_, between
 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 Equipment Note and not defined herein shall
 have the respective meanings assigned in the Indenture. 

         This Equipment Note 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 Equipment Note Register for the purpose
 of registering transfers and exchanges of Equipment Notes 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 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
 Indenture.  Each such payment shall be made on the date such payment is due
 and without any presentment or surrender of this Equipment Note, except
 that in the case of any final payment with respect to this Equipment Note,
 the Equipment Note shall be surrendered promptly thereafter to the
 Indenture Trustee for cancellation. 

         The holder hereof, by its acceptance of this Equipment Note, agrees
 that, except as provided in the Indenture, each payment of an installment
 of the Principal Amount, Make-Whole Premium, if any, and interest received
 by it hereunder shall be applied, first, to the payment of accrued interest
 on this Equipment Note (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
 Equipment Note (or portion hereof) then due (other than by reason of
 redemption), third, to the payment of Make-Whole Amount, if any, and any
 other amount due hereunder or under the Indenture, and fourth, the balance,
 if any, remaining thereafter, to the payment of the Principal Amount hereof 
 remaining unpaid and due by reason of redemption.  The amounts paid
 pursuant to clause fourth of the preceding sentence shall be applied to
 installments of the Principal Amount of this Equipment Note remaining
 unpaid in the inverse order of their normal maturity.  

         This Equipment Note is one of the Equipment Notes referred to in
 the Indenture which have been or are to be issued by Owner pursuant to the
 terms of the Indenture.  The Indenture Estate is held by the Indenture
 Trustee as security, in part, for the Equipment Notes.  The provisions of
 this Equipment Note are subject to the Indenture.  Reference is hereby made
 to the 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 Equipment Note and the rights and obligations of
 the holders of, and the nature and extent of the security for, any other
 Equipment Notes executed and delivered under the Indenture, as well as for
 a statement of the terms and conditions of the Trust created by the
 Indenture, to all of which terms and conditions in the Indenture and the
 Participation Agreement each holder hereof agrees by its acceptance of this
 Equipment Note.   

         As provided in the Indenture and subject to certain limitations
 therein set forth, this Equipment Note is exchangeable for a like aggregate
 Principal Amount of Equipment Notes of different authorized denominations,
 as requested by the holder surrendering the same. 

         Prior to the due presentment for registration of transfer of this
 Equipment Note, Owner and the Indenture Trustee shall deem and treat the
 Person in whose name this Equipment Note is registered on the Equipment
 Note Register as the absolute owner and holder hereof for the purpose of
 receiving all amounts payable with respect to this Equipment Note and for
 all purposes, and neither of Owner nor the Indenture Trustee shall be
 affected by notice to the contrary. 

         This Equipment Note is subject to redemption as provided in
 Sections 2.10, 2.11 and 2.12 of the Indenture but not otherwise.  

         [The indebtedness evidenced by this Equipment Note is, to the
 extent and in the manner provided in the Indenture, subordinate and subject
 in right of payment to the prior payment in full of the Secured Obligations
 (as defined in the Indenture) in respect of [Series A Equipment Notes](1)
 [Series A and Series B Equipment Notes](2) , and this Equipment Note is issued
 subject to such provisions.  The Note Holder of this Equipment Note, 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 Indenture and (c) appoints the Indenture Trustee his
  attorney-in-fact for such purpose.](3)  

 --------------------------
 (1)    To be inserted in the case of a Series B Equipment Note.  

 (2)    To be inserted in the case of a Series C Equipment Note. 

 (3)    To be inserted for each Equipment Note other than any 
        Series A Equipment Note.

         Unless the certificate of authentication hereon has been executed
 by or on behalf of the Indenture Trustee by manual signature, this
 Equipment Note shall not be entitled to any benefit under the Indenture or
 be valid or obligatory for any purpose. 

         THIS EQUIPMENT NOTE SHALL BE GOVERNED BY AND CONSTRUED IN
 ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK. 

                                   *   *   * 

         IN WITNESS WHEREOF, Owner has caused this Equipment Note to be
 executed in its corporate name by its officer thereunto duly authorized on
 the date hereof. 

                             US AIRWAYS, INC. 


                             By:  ____________________________ 
                                  Name:   
                                  Title:   



             INDENTURE TRUSTEE'S CERTIFICATE OFAUTHENTICATION  

         This is one of the Equipment Notes referred to in the within-
 mentioned Indenture. 

                             STATE STREET BANK AND TRUST COMPANY,  
                             not in its individual capacity but  
                             solely as Indenture Trustee  


                             By:  ____________________________ 
                                  Name:   
                                  Title: 


                                   SCHEDULE I

                          EQUIPMENT NOTES AMORTIZATION

 Payment Date                               Principal Amount to be Paid 
 ------------                               --------------------------- 

                         [SEE SCHEDULE I TO INDENTURE 
                      WHICH IS INSERTED UPON ISSUANCE] 

                                 *   *   * 

           SECTION 2.02.   Issuance and Terms of Equipment Notes.

           The Equipment Notes 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 date hereof, each
 Equipment Note shall be issued to the Pass Through Trustees (or their
 designee) under the Pass Through Agreements as set forth in Schedule II
 hereto in connection therewith. The Equipment Notes shall be issued in
 registered form only.  The Equipment Notes shall be issued in denominations
 of $1,000 and integral multiples thereof, except that one Equipment Note of
 each Series may be in an amount that is not an integral multiple of $1,000. 

           Each Equipment Note 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 ________ __, ____, and on each ______ __
 and ______ __ thereafter until maturity.  The Principal Amount of each
 Equipment Note shall be payable on the dates and in the installments which
 shall be attached as Schedule I to the Equipment Notes.  Notwithstanding
 the foregoing, the final payment made under each Equipment Note 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
 Equipment Note.  Each Equipment Note 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 Equipment Note
 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 if 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. 

           Owner agrees to pay to the Indenture Trustee for distribution in
 accordance with Section 3.04 hereof (i) to the extent not payable (whether or
 not in fact paid) under Section 7(a) of the Note Purchase Agreement (as
 originally in effect or as amended with the consent of the Owner) an amount
 or amounts equal to the fees payable to the Liquidity Provider under
 Section 2.03 of each Liquidity Facility and the related Fee Letter (as
 defined in the Intercreditor Agreement) multiplied by a fraction the
 numerator of which shall be the then outstanding aggregate principal amount
 of the Series A Equipment Notes, Series B Equipment Notes and Series C
 Equipment Notes and the denominator of which shall be the then outstanding
 aggregate principal amount of all "Series A Equipment Notes", "Series B
 Equipment Notes" and "Series C Equipment Notes" (in each case as defined in
 the relevant Operative Indenture) issued under the Operative Indentures;
 (ii) (x) the amount equal to interest on any Downgrade Advance  (other than
 any Applied Downgrade Advance) payable under Section 3.07 of each Liquidity
 Facility minus Investment Earning from such Downgrade Advance multiplied by
 (y) the fraction specified in the foregoing clause (i); (iii) (x) the
 amount equal to interest on any Non-Extension Advance (other than any
 Applied Non-Extension Advance) payable under Section 3.07 of each Liquidity
 Facility minus Investment Earnings from such Non-Extension Advance
 multiplied by (y) the fraction specified in the foregoing clause (i); (iv)
 if any payment default shall have occurred and be continuing with respect
 to interest on any Series A Equipment Note, Series B Equipment Note or
 Series C Equipment Note, (x) the excess, if any, of (1) the amount equal to
 interest on any Unpaid Advance,  Applied Downgrade Advance or Applied  Non-
 Extension Advance payable  under  Section 3.07 of each Liquidity Facility
 over (2) the sum of Investment Earnings from any Final Advance plus any
 amount of interest at the Past Due Rate actually payable  (whether or not
 in fact paid) by Owner in respect of the overdue scheduled  interest on the
 Equipment Notes in respect of which such Unpaid Advance, Applied Downgrade
 Advance or Applied Non-Extension Advance was made multiplied by (y) a
 fraction the numerator of which shall be the then aggregate overdue amounts
 of interest on the Series A Equipment Notes, Series B Equipment Notes and
 Series C  Equipment Notes (other than interest becoming due and payable
 solely as a result of  acceleration of any such Equipment Notes) and the
 denominator of which shall be the then aggregate overdue amounts of
 interest on all "Series A Equipment Notes", "Series B Equipment  Notes" and
 "Series C Equipment Notes" (in each case as defined in the relevant
 Operative Indentures) issued under the Operative Indentures  (other than
 interest becoming due and payable solely as a result of acceleration of any
 such "Equipment Notes") and (v) 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
 (i), (ii), (iii) or (iv) above multiplied by the fraction specified in the
 foregoing clause (i).  For purposes of this paragraph, the terms "Applied
 Downgrade Advance", "Applied Non-Extension Advance", "Cash Collateral
 Account", "Downgrade Advance", "Final Advance", "Investment Earnings",
 "Non-Extension Advance" and "Unpaid Advance" shall have the meanings
 specified in each Liquidity Facility or the Intercreditor Agreement. 

           The Equipment Notes shall be executed on behalf of Owner by its
 President or one of its Vice Presidents, Assistant Vice Presidents or
 Assistant Secretaries or other authorized officer.  Equipment Notes bearing
 the signatures of individuals who were at any time the proper officers of
 Owner shall bind Owner, notwithstanding that such individuals or any of
 them have ceased to hold such offices prior to the authentication and
 delivery of such Equipment Notes or did not hold such offices at the
 respective dates of such Equipment Notes. Owner may from time to time
 execute and deliver Equipment Notes with respect to the Aircraft to the
 Indenture Trustee for authentication upon original issue and such Equipment
 Notes shall thereupon be authenticated and delivered by the Indenture
 Trustee upon the written request of Owner signed by a Vice President or
 Assistant Vice President or other authorized officer of Owner; provided,
 however, that each such request shall specify the aggregate Principal
 Amount of all Equipment Notes to be authenticated hereunder on original
 issue with respect to the Aircraft. No Equipment Note shall be secured by
 or entitled to any benefit under this Indenture or be valid or obligatory
 for any purposes, unless there appears on such Equipment Note 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 Equipment Notes shall be conclusive evidence, and the
 only evidence, that such Equipment Note has been duly authenticated and
 delivered hereunder. 

           SECTION 2.03.   [Reserved].

           SECTION 2.04.   Method of Payment.

           (a)  The Principal Amount of, interest on, Make-Whole Amount, if
 any, and other amounts due under each Equipment Note or hereunder will be
 payable in Dollars by wire transfer of immediately available funds not
 later than 11:00 a.m., New York City time, on the due date of payment to
 the Indenture Trustee at the Corporate Trust Office for distribution among
 the Note Holders in the manner provided herein.  Owner shall not have any
 responsibility for the distribution of such payment to any Note Holder.
 Notwithstanding the foregoing or any provision in any Equipment Note to the
 contrary, the Indenture Trustee will use reasonable efforts to pay or cause
 to be paid, if so directed in writing by any Note Holder (with a copy to
 Owner), all amounts paid by Owner hereunder and under such holder's
 Equipment Note or Equipment Notes to such holder or a nominee therefor
 (including all amounts distributed pursuant to Article III of this
 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 Federal Funds 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
 Equipment Note, except that, in the case of the final payment in respect of
 any Equipment Note, such Equipment Note shall be surrendered to the
 Indenture Trustee for cancellation promptly after such payment. 
 Notwithstanding any other provision of this 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 11:00 a.m., New York City time, at the place of payment. 
 Prior to the due presentment for registration of transfer of any Equipment
 Note, Owner and the Indenture Trustee shall deem and treat the Person in
 whose name any Equipment Note is registered on the Equipment Note Register
 as the absolute owner and holder of such Equipment Note for the purpose of
 receiving payment of all amounts payable with respect to such Equipment
 Note and for all other purposes, and neither Owner nor 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 Note Holder, all payments to it shall be made to the account of
 such Note 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 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 Equipment Note (and such exclusion and withholding shall
 constitute payment in respect of such Equipment Note) 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 Equipment Notes, to withhold such
 amounts (and such withholding shall constitute payment in respect of such
 Equipment Note) and timely pay the same to the appropriate authority in the
 name of and on behalf of the Note 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 Note
 Holder (with a copy to Owner) appropriate receipts showing the payment
 thereof, together with such additional documentary evidence as any such
 Note Holder may reasonably request from time to time. 

           If a Note 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 Equipment Note(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 Note Holder)
 to be withheld from payments hereunder or under the Equipment Notes held by
 such holder in respect of United States federal income tax (and such
 withholding shall constitute payment in respect of such Equipment Note). 
 If a Note 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 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
 Equipment Notes held by such holder, no amount shall be withheld from
 payments in respect of United States federal income tax.  If any Note
 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
 Equipment Notes held by such holder, the Indenture Trustee agrees to
 withhold from each payment due to the relevant Note 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.  Owner shall not be
 liable if the Indenture Trustee fails to withhold withholding taxes in
 accordance with this Section 2.04 or if any Note 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 Equipment Note, 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 Equipment Note
 (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 Equipment
 Note (or a portion thereof) then due thereunder (other than by reason of
 redemption);  

           Third:  to the payment of Make-Whole Amount, if any, and any
 other amount due hereunder or under such Equipment Note; and  

           Fourth:  the balance, if any, remaining thereafter, to the
 payment of the Principal Amount of such Equipment Note remaining unpaid and
 due by reason of redemption (provided that such Equipment Note 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 Equipment Note in
 the inverse order of their normal maturity. 

           SECTION 2.06.   Termination of Interest in Indenture Estate. 

           A Note Holder and Indenture Indemnitees shall not, as such, have
 any further interest in, or other right with respect to, the Indenture
 Estate when and if the Secured Obligations due to such Note Holder or
 Indenture Indemnitee shall have been paid in full. 

           SECTION 2.07.   Registration, Transfer and Exchange of Equipment
 Notes.

           The Indenture Trustee shall keep a register (the "Equipment Note
 Register") in which the Indenture Trustee shall provide for the
 registration of Equipment Notes and the registration of transfers of
 Equipment Notes. No such transfer shall be given effect unless and until
 registration hereunder shall have occurred.  The Equipment Note Register
 shall be kept at the Corporate Trust Office of the Indenture Trustee.  The
 Indenture Trustee is hereby appointed "Equipment Note Registrar" for the
 purpose of registering Equipment Notes and transfers of Equipment Notes as
 herein provided. A holder of any Equipment Note intending to exchange such
 Equipment Note shall surrender such Equipment Note 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 Equipment Note,
 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 Equipment Note, Owner shall execute, and the Indenture Trustee shall
 authenticate and deliver, in the name of the designated transferee or
 transferees, one or more new Equipment Notes of a like aggregate Principal
 Amount and of the same series.  At the option of the Note Holder, Equipment
 Notes may be exchanged for other Equipment Notes of any authorized
 denominations of a like aggregate Principal Amount, upon surrender of the
 Equipment Notes to be exchanged to the Indenture Trustee at the Corporate
 Trust Office.  Whenever any Equipment Notes are so surrendered for
 exchange, Owner shall execute, and the Indenture Trustee shall authenticate
 and deliver, the Equipment Notes which the Note Holder making the exchange
 is entitled to receive.  All Equipment Notes issued upon any registration
 of transfer or exchange of Equipment Notes (whether under this Section 2.07
 or under Section 2.08 hereof or otherwise under this Indenture) shall be
 the valid obligations of Owner evidencing the same respective obligations,
 and entitled to the same security and benefits under this Indenture, as the
 Equipment Notes surrendered upon such registration of transfer or exchange. 
 Every Equipment Note 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 Note 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 Equipment
 Note of the amount of all payments of Principal Amount previously made on
 the old Equipment Note or Equipment Notes with respect to which such new
 Equipment Note is issued and the date to which interest on such old
 Equipment Note or Equipment Notes has been paid.  Interest shall be deemed
 to have been paid on such new Equipment Note to the date on which interest
 shall have been paid on such old Equipment Note, and all payments of the
 Principal Amount marked on such new Equipment Note, as provided above,
 shall be deemed to have been made thereon.  Owner shall not be required to
 exchange any surrendered Equipment Notes as provided above during the ten-
 day period preceding the due date of any payment on such Equipment Note. 
 Owner shall in all cases deem the Person in whose name any Equipment Note
 shall have been issued and registered as the absolute owner and holder of
 such Equipment Note for the purpose of receiving payment of all amounts
 payable by Owner with respect to such Equipment Note and for all purposes
 until a notice stating otherwise is received from the Indenture Trustee and
 such change is reflected on the Equipment Note Register.  The Indenture
 Trustee will promptly notify Owner of each registration of a transfer of a
 Equipment Note.  Any such transferee of a Equipment Note, by its acceptance
 of a Equipment Note, agrees to the provisions of the Participation
 Agreement applicable to Note Holders, 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 Note 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 Equipment Notes upon
 transfer or exchange within ten (10) Business Days of the date a Equipment
 Note is surrendered for transfer or exchange.  

           SECTION 2.08.   Mutilated, Destroyed, Lost or Stolen Equipment
 Notes.

           If any Equipment Note shall become mutilated, destroyed, lost or
 stolen, Owner shall, upon the written request of the holder of such
 Equipment Note, execute and the Indenture Trustee shall authenticate and
 deliver in replacement thereof a new Equipment Note, payable in the same
 Principal Amount dated the same date and captioned as issued in connection
 with the Aircraft.  If the Equipment Note being replaced has become
 mutilated, such Equipment Note shall be surrendered to the Indenture
 Trustee and a photocopy thereof shall be furnished to Owner.  If the
 Equipment Note being replaced has been destroyed, lost or stolen, the
 holder of such Equipment Note shall furnish to Owner and the Indenture
 Trustee such security or indemnity as may be required by them to save Owner
 and the Indenture Trustee harmless and evidence satisfactory to Owner and
 the Indenture Trustee of the destruction, loss or theft of such Equipment
 Note 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 Equipment Note, then the written indemnity of
 such QIB, signed by an authorized officer thereof, in favor of, delivered
 to and in form reasonably satisfactory to 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 Equipment Note. Subject to compliance by the Note
 Holder of the requirements set forth in this Section 2.08, the Indenture
 Trustee and Owner shall use all reasonable efforts to issue new Equipment
 Notes within ten (10) Business Days of the date of the written request
 therefor from the Note Holder.  

           SECTION 2.09.   Payment of Expenses on Transfer; Cancellation. 

           (a)  No service charge shall be made to a Note Holder for any
 registration of transfer or exchange of Equipment Notes, but the Indenture
 Trustee, as Equipment Note 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
 Equipment Notes.

           (b)  The Indenture Trustee shall cancel all Equipment Notes
 surrendered for replacement, redemption, transfer, exchange, payment or
 cancellation and shall destroy the canceled Equipment Notes. 

           SECTION 2.10.   Mandatory Redemptions of Equipment Notes.

           On the date on which Owner is required pursuant to Section 5.06
 to make payment for an Event of Loss with respect to the Aircraft, all of
 the Equipment Notes 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 Note Holders but
 without the Make-Whole Amount. 

           SECTION 2.11.   Voluntary Redemptions of Equipment Notes. 

           All, but not less than all, of the Equipment Notes may be
 redeemed by Owner upon at least twenty (20) days' revocable prior written
 notice to the Indenture Trustee, and the Equipment Notes 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 Note Holders plus the Make-Whole Amount, if any. 

           SECTION 2.12.   Redemptions; Notice of Redemption.

           (a)  Neither any redemption of any Equipment Note nor any
 purchase by Owner of any Equipment Note may be made except to the extent
 and in the manner expressly permitted by this Indenture.  No purchase of
 any Equipment Note may be made by the Indenture Trustee. 

           (b)  Notice of redemption or purchase with respect to the
 Equipment Notes shall be given by the Indenture Trustee by first-class
 mail, postage prepaid, mailed not less than fifteen (15) nor more than
 sixty (60) days prior to the applicable redemption date, to each Note
 Holder of such Equipment Notes to be redeemed or purchased, at such Note
 Holder's address appearing in the Equipment Note Register.  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 Equipment Note,
 and that, if any such Equipment Notes are then outstanding, interest on
 such Equipment Notes shall cease to accrue on and after such redemption
 date, and (4) the place or places where such Equipment Notes are to be
 surrendered for payment of the redemption price. 

           (c)  On or before the redemption date, Owner (or any person on
 behalf of Owner) shall, to the extent an amount equal to the redemption
 price for the Equipment Notes to be redeemed or purchased on the redemption
 date shall not then be held in the Indenture Estate, deposit or cause to be
 deposited with the Indenture Trustee by 11:00 a.m. New York City time on
 the redemption date in immediately available funds the redemption price of
 the Equipment Notes to be redeemed or purchased.

           (d)  Notice of redemption or purchase having been given as
 aforesaid, the Equipment Notes 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 Equipment Notes then outstanding shall cease to bear interest. 
 Upon surrender of any such Equipment Note for redemption or purchase in
 accordance with said notice, such Equipment Note shall be redeemed at the
 redemption price.  If any Equipment Note 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
 Equipment Note as of such redemption date. 

           SECTION 2.13.   [Reserved].

           SECTION 2.14.   [Reserved].

           SECTION 2.15.   Subordination.

           (a)  Owner and, by acceptance of its Equipment Notes of any
 Series, each Note 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 Note 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(e) hereof, except as expressly
 provided in Article III hereof.

           (b)  By the acceptance of its Equipment Notes of any Series
 (other than Series A), each Note Holder of such Series agrees that in the
 event that such Note Holder, in its capacity as a Note 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 Note Holders of Series A until the Secured Obligations in
 respect of Series A Equipment Notes have been paid in full and (ii) after
 the Secured Obligations in respect of Series A Equipment Notes have been
 paid in full, the Note Holders of Series B until the Secured Obligations in
 respect of Series B Equipment Notes have been paid in full. 


                                 ARTICLE III

                  RECEIPT, DISTRIBUTION AND APPLICATION OF 
                      INCOME FROM THE INDENTURE ESTATE 

           SECTION 3.01.   Basic Distributions     

     Except as otherwise provided in Sections 3.02 and 3.03 hereof, each 
periodic payment of principal or interest on the Equipment Notes received by the
Indenture Trustee shall be promptly distributed in the following order of 
priority: (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 Equipment
Notes shall be distributed to the Noteholders 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 Equipment Note bears to the 
aggregate amount of the payments then due under all Series A Equipment Notes;
(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 other overdue amounts)
then due under all Series B Equipment Notes shall be distributed to the
Noteholders 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 Equipment Note bears to the aggregate amount of the payments then due
under all Series B Equipment Notes; 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
Equipment Notes shall be distributed to the Noteholders 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 Equipment Note bears to
the aggregate amount of the payments then due under all Series C Equipment
Notes.       

           SECTION 3.02.   Event of Loss; Optional Redemption.

           Except as otherwise provided in Section 3.03 hereof, any payments
 received by the Indenture Trustee with respect to the Aircraft (i) as the
 result of an Event of Loss or (ii) in connection with any optional
 redemption of the Equipment Notes effected in accordance with the Operative
 Documents, shall be applied to redemption of the Equipment Notes, to
 payment of the Secured Obligations or to the Indenture Trustee or any Note
 Holder under the Participation Agreement by applying such funds in the
 following order of priority: 

           First, (i) to reimburse the Indenture Trustee and the Note
 Holders for any reasonable costs or expenses incurred in connection with
 such redemption for which they are entitled to reimbursement, or indemnity
 by Owner, under the Operative Documents and then (ii) to pay any other
 amounts then due to the Indenture Trustee and the Note Holders under this
 Indenture, the Participation Agreement or the Equipment Notes; and 

           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 Equipment Notes; (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 Equipment
 Notes; 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 Equipment Notes. 

           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 Equipment Notes 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
 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, revenues, issues, products and
 profits of, the property included in the 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 Note Holders in the protection, exercise or
 enforcement of any right, power or remedy or any damages sustained by the
 Indenture Trustee or any Note Holder, liquidated or otherwise, upon such
 Event of Default shall be applied by the Indenture Trustee as between
 itself and the Note Holders in reimbursement of such expenses and any other
 expenses for which the Indenture Trustee or the Note Holders are entitled
 to reimbursement under any Operative Document and all amounts payable to
 the other Indenture Indemnitees hereunder and under the Participation
 Agreement excluding those amounts described in clauses "Second" and "Third"
 below, 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 Note 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 Note
 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 Note Holder pursuant to said Section 5.03 hereof; and 

           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 Equipment Notes, and the accrued but unpaid interest and other
 amounts due thereon and all other Secured Obligations in respect of the
 Series A Equipment Notes to the date of distribution, shall be distributed
 to the Note 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 Equipment Notes 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 Equipment Notes 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
 Equipment Notes, and the accrued but unpaid interest and other amounts due
 thereon and all other Secured Obligations in respect of the Series B
 Equipment Notes to the date of distribution, shall be distributed to the
 Note 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 Equipment Notes 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 Equipment Notes 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 Equipment Notes, and the accrued but unpaid interest and other amounts
 due thereon and all other Secured Obligations in respect of the Series C
 Equipment Notes to the date of distribution, shall be distributed to the
 Note 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 Equipment Notes 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 Equipment Notes held by all such
 holders plus the accrued but unpaid interest and other amounts due thereon
 to the date of distribution. 

           No Make-Whole Amount shall be due and payable on the Equipment
 Notes as a consequence of the acceleration of the Equipment Notes.  

           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 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 Owner in respect of (i) the
 Indenture Trustee in its individual capacity or any other Indenture
 Indemnitees, (ii) any Note Holder, (iii) the Subordination Agent, (iv) the
 Liquidity Provider, and (v) the Pass Through Trustees, in each case
 pursuant to Section 6 of the Participation Agreement, 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.

           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 Indenture or in any other Operative Document
 shall be distributed by the Indenture Trustee in the manner provided in
 clause "First" 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 with respect to the Aircraft, to
 the extent received or realized at any time after payment in full of all
 Secured Obligations due the Note Holders, shall be distributed by the
 Indenture Trustee to Owner. 

           Second,  in the manner provided in clause "Fourth" of Section
 3.03 hereof.   

           SECTION 3.06.   Payments to Owner.

           Any amounts distributed hereunder by the Indenture Trustee to
 Owner shall be paid to 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 Owner to the
 Indenture Trustee from time to time.  


                                 ARTICLE IV

                   CERTAIN COVENANTS OF OWNER; EVENTS OF 
                   DEFAULT; REMEDIES OF INDENTURE TRUSTEE 

           SECTION 4.01.   Certain Covenants of Owner.

           Owner hereby covenants and agrees that it will duly and
 punctually pay the Principal Amount of, Make-Whole Amount, if any, and
 interest on and other amounts due under the Equipment Notes and hereunder
 in accordance with the terms of the Equipment Notes and this Indenture and
 all amounts, if any, payable by it to the Note Holders under the
 Participation Agreement. 

           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)  the failure of Owner 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 Equipment Note or hereunder and such
 failure shall have continued unremedied for ten 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 Business Days
 after Owner receives written demand from the Indenture Trustee or any Note
 Holder; or

           (b)  any representation or warranty made by Owner herein, in the
 Participation Agreement or in any certificate furnished by Owner to the
 Indenture Trustee or any Note 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 adverse to the interests of the Indenture Trustee or the Note Holders;
 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 following notice thereof from
 the Indenture Trustee or any Note Holder to the Owner; or

           (c)  other than as provided in (d) below, any failure by Owner to
 observe or perform any other covenant or obligation of the Owner for the
 benefit of the Indenture Trustee or the Note Holders contained in the
 Participation Agreement, the Equipment Notes or this Indenture which is not
 remedied within a period of sixty (60) days after notice thereof has been
 given to Owner; or

           (d)  if at any time when the Aircraft is registered under the
 laws of the United States, Owner shall not be a Citizen of the United
 States, and as the result thereof the registration of the Aircraft under
 the Transportation Code, 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 Owner has Actual Knowledge
 of the state of facts that resulted in such ineffectiveness and of such
 loss of citizenship; or

           (e)  at any time either (i) the commencement of an involuntary
 case or other proceeding in respect of Owner 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 seeking the appointment of a receiver, liquidator, assignee,
 custodian, trustee, sequestrator (or similar official) of 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 (ii) the commencement by Owner 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 Owner to the
 appointment of or taking possession by a receiver, liquidator, assignee,
 trustee, custodian, sequestrator (or other similar official) of Owner or
 for all or substantially all of its property, or the making by Owner of any
 assignment for the benefit of creditors or Owner shall take any action to
 authorize any of the foregoing; or

           (f)  Owner shall fail to carry and maintain or with respect to
 the Aircraft (or cause to be carried or maintained) insurance required to
 be maintained in accordance with Section 7.04 hereof.

           SECTION 4.03.   [Reserved].

           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),
 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 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 Owner  and all persons claiming under Owner wholly or partly
 therefrom; provided, however, that during any period the Aircraft is
 subject to the Civil Reserve Air Fleet Program 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 exercise or pursue any of the powers, rights or
 remedies described in this Section 4.04 in such manner as to limit Owner's
 control (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
 Owner (and any Lessee) with a copy addressed to the Contracting Office
 Representative of the Air Mobility Command of the United States Air Force
 under any contract with Owner (or any Lessee) relating to the Aircraft;
 provided further, that the Indenture Trustee shall give Owner 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. 

           (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 Note Holders), subject to Section 4.03 hereof, at any time, by
 delivery of written notice or notices to Owner, declare all the Equipment
 Notes to be due and payable, whereupon the unpaid Principal Amount of all
 Equipment Notes 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; provided that if an Event of
 Default referred to in clause (e) of Section 4.02 hereof shall have
 occurred and be continuing, then and in every such case the unpaid
 Principal Amount then outstanding, together with accrued but unpaid
 interest and all other amounts due thereunder and hereunder shall
 immediately and without further act 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 Equipment Notes
 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 Equipment Notes and all other amounts
 payable under the Equipment Notes (except the Principal Amount of the
 Equipment Notes 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 Indenture shall have been
 cured, then and in every such case a Majority in Interest of Note 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 Note Holder shall be entitled, at any sale pursuant to
 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 Note
 Holder and secured by the Lien of this Indenture (but only to the extent
 that such purchase price would have been paid to such Note 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 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 Indenture,
 the unpaid Principal Amount of all Equipment Notes 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 Note 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, Owner shall promptly execute and deliver to the
 Indenture Trustee such instruments 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 Indenture Estate to which the Indenture Trustee shall at the time be
 entitled hereunder.  If Owner 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
 to execute and deliver such instruments and documents to the Indenture
 Trustee, to the entry of which judgment 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 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 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 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,
 except Excluded Payments, without prejudice, however, to the right of the
 Indenture Trustee under any provision of this Indenture to collect and
 receive all cash held by, or required to be deposited with, the Indenture
 Trustee hereunder other than Excluded Payments.  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, and all other payments
 which the Indenture Trustee may be required or authorized to make under any
 provision of this 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 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
 Owner 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 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 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 Indenture Trustee or Owner 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 Note
 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 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 Note
 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 Equipment Note 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 Note Holder. 

           SECTION 4.09.   Appointment of Receiver. 

           If an Event of Default shall have occurred and be continuing, 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
 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 4.10.   Indenture Trustee Authorized to Execute Bills of
 Sale, Etc.

           Owner irrevocably appoints the Indenture Trustee the true and
 lawful attorney-in-fact of 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 in accordance with applicable law any sale,
 assignment, transfer or delivery for the enforcement of the Lien of this
 Indenture, whether pursuant to foreclosure or power of sale, assignments
 and other instruments as may be necessary or appropriate, with full power
 of substitution, 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, 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 4.11.   Rights of Note Holders to Receive Payment. 

           Notwithstanding any other provision of this Indenture, the right
 of any Note Holder to receive payment of principal of, and premium, if any,
 and interest on a Equipment Note on or after the respective due dates
 expressed in such Equipment Note, 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
 Note 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 by Owner to pay when due
 any payment of Principal Amount of, interest on, or Make-Whole Amount, if
 any, due and payable under any Equipment Note, the Indenture Trustee shall
 give prompt written notice thereof to the Owner and each Note Holder. 
 Subject to the terms of Sections 2.14, 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 Note 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 Note 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 Note Holders.  

           SECTION 5.02.   Action upon Instructions; Certain Rights and
 Limitations. 

           Subject to the terms of Sections 4.04(a) and (b), 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 Note 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 under the Participation
 Agreement, the Purchase Agreement, or any other part of the Indenture
 Estate as shall be specified in such instructions.  

           The Indenture Trustee will execute and 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
 Indenture Estate as specified by Owner pursuant to Section 7(d) of the
 Participation Agreement or as may be specified from time to time in written
 instructions of a Majority in Interest of Note 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 Note 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 required to take any action or
 refrain from taking any action under Sections 5.01 (other than the first
 sentence thereof) or 5.02 or Article IV hereof unless the Indenture Trustee
 shall have been indemnified to its reasonable satisfaction against any
 liability, cost or expense (including counsel fees) which may be incurred
 in connection therewith pursuant to a written agreement with one or more
 Note Holders.  The Indenture Trustee shall not be under any obligation to
 take any action under this 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
 Note 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 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 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 Indenture Estate, or to
 otherwise take or refrain from taking any action under, or in connection
 with, this Indenture or any part of the Indenture Estate, except as
 expressly provided by the terms of this Indenture or as expressly provided
 in written instructions from Note Holders as provided in this Indenture;
 and no implied duties or obligations shall be read into this 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 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 Indenture
 Estate or any other transaction pursuant to this Indenture or any document
 included in the Indenture Estate. 

           SECTION 5.05.   No Action Except Under 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 Indenture Estate except in accordance
 with the powers granted to, or the authority conferred upon, the Indenture
 Trustee pursuant to this Indenture and in accordance with the express terms
 hereof. 

           SECTION 5.06.   Replacement Airframes and Replacement Engines. 

           (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, 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 sixty (60) days after such Event of Loss, Owner shall
 give the Indenture Trustee written notice of its election to perform one of
 the following options (it being agreed that if Owner shall not have given
 such notice of election within such period, Owner shall be deemed to have
 elected the option set forth in clause (i) below).  Owner may elect either
 to:  

                       (i)    redeem the Equipment Notes in the manner
      set forth in Section 2.10(a) on 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 Owner to
      the 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 Owner does not perform its obligation to effect such
      substitution in accordance with this Section 5.06(a), during the
      period of time provided herein, then Owner shall redeem the
      Equipment Notes in the manner set forth in Section 2.10(a) on the
      Business Day next succeeding the 120th day following the
      occurrence of such Event of Loss.

           In the event Owner shall elect to substitute an aircraft (or an
 airframe or an airframe and one or more engines, as the case may be) 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, (1) furnish
 the Indenture Trustee with such evidence as the Indenture Trustee may
 reasonably request that Owner holds title to such aircraft (or such
 airframe or such 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 at least equal to the Aircraft subject to such Event
 of Loss assuming that the Aircraft had been maintained in accordance with
 the requirements of this Indenture, and Owner shall cause an Indenture
 Supplement to be duly executed by Owner and filed for recording pursuant to
 the Transportation Code, or the applicable laws, rules and regulations of
 any other jurisdiction in which the Airframe may then be registered as
 permitted by Section 7(d) of the Participation Agreement with respect to
 such substituted property, (2) 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 the Indenture Trustee to
 perfect the Indenture Trustee's interest therein, (3) furnish the Indenture
 Trustee with such evidence of compliance with the insurance provisions
 hereof with respect to such substituted property as the Indenture Trustee
 may reasonably request and (4) furnish the Indenture Trustee with an
 opinion of counsel (which shall be Skadden, Arps, Slate, Meagher & Flom LLP
 or Skadden, Arps, Slate, Meagher & Flom (Illinois) and, if not, other
 counsel chosen by 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 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 the Indenture Trustee with respect to
 the Aircraft.  For all purposes hereof, the property so substituted shall
 be deemed part of the property subject to the Lien of this Indenture and
 shall be deemed an "Aircraft", "Airframe" and "Engine", as the case may be,
 as defined herein.   

           (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, Owner shall forthwith (and in any event, within fifteen
 days after such occurrence) give the Indenture Trustee written notice
 thereof and shall, within one hundred twenty (120) days after the
 occurrence of such Event of Loss, (i) cause an Indenture Supplement to be
 duly executed by Owner and to be filed for recording pursuant to the
 Transportation Code, or the applicable laws, rules and regulations of any
 other jurisdiction in which the Airframe may then be registered as
 permitted by Section 7(d) of the Participation Agreement with respect to an
 Acceptable Alternative Engine and, (ii) furnish the Indenture Trustee with
 such evidence of compliance with the insurance provisions hereof with
 respect to such replacement engine as the Indenture Trustee  may reasonably
 request.  For all purposes hereof, each such replacement engine shall,
 after such conveyance, be deemed part of the property subject to the Lien
 of this Indenture hereunder, and shall be deemed an "Engine".  

           (c)  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, Owner shall replace such Engine hereunder
 by complying (or causing any Lessee to comply) with the terms of Section
 5.06(b) to the same extent as if an Event of Loss had occurred with respect
 thereto, and, upon compliance with Section 5.06(b), any payments received
 by Owner from such government with respect to such requisition shall be
 paid over to, or retained by, Owner.

           (d)  Application of Payments During Existence of Event of
 Default.  Any amount referred to in this Section 5.06 which is payable to
 or retainable by Owner shall not be paid to or retained by Owner 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 Owner hereunder and, if an Event
 of Default has occurred and is continuing hereunder, applied against
 Owner'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
 Owner to the extent not previously applied in accordance with the preceding
 sentence.

           SECTION 5.07.   Indenture Supplements for Replacements. 

           If a Replacement Airframe or Replacement Engine is being
 substituted as contemplated by Section 5.06, Owner and the Indenture
 Trustee agree for the benefit of the Note Holders and Owner, subject to
 fulfillment of the conditions precedent and compliance by Owner with the
 requirements of Section 5.06 hereof with respect to such Replacement
 Airframe or Replacement Engine, to execute and deliver an Indenture
 Supplement.  

           SECTION 5.08.   Effect of Replacement. 

           In the event of the substitution of an Airframe or of a
 Replacement Engine pursuant to Section 5.06, (a) all provisions of this
 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 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. 

           SECTION 5.09.   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
 Owner so long as the Indenture Trustee may acquire the same using its best
 efforts.  Unless otherwise expressly provided in this 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
 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 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 Indenture and agrees to receive and disburse all monies constituting
 part of the Indenture Estate 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 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)
 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
 from the inaccuracy of any representation or warranty of the Indenture
 Trustee (in its individual capacity) in the Participation Agreement or
 expressly made hereunder.   

           SECTION 6.02.   Absence of Duties.

           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 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 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 Indenture Estate, or (iv) to inspect the
 Aircraft at any time or ascertain or inquire as to the performance or
 observance of any of Owner's covenants hereunder 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 MAKES 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 capacity, does not make and shall not be deemed to have
 made any representation or warranty as to the validity, legality or
 enforceability of this Indenture, the Participation Agreement, the
 Equipment Notes, the Purchase Agreement, the Purchase Agreement Assignment,
 or the Consent and Agreement, or as to the correctness of any statement
 contained in any thereof.    

           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 Note
 Holders or the Owner as provided in Article III hereof need not be
 segregated in any manner except to the extent required by Law 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 Owner so long as no Event of Default has occurred and
 is continuing (or in the absence of such direction, by the Majority In
 Interest of Note 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.

           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 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 Equipment Notes
 outstanding as of any date, 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 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 them
 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 Indenture Estate, 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
 advice or opinion of any such counsel, accountants or other skilled
 persons. 

           SECTION 6.06.   [Reserved].

           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 Indenture Estate for the payment of such
 compensation, to the extent that such compensation shall not be paid by
 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 Indenture
 Estate toward such payments.  The Indenture Trustee agrees that it shall
 have no right against the Loan Participants or the Note Holders for any fee
 as compensation for its services as trustee under this Indenture.  

           SECTION 6.08.   Instructions from Note 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 Note Holders should any provision of this 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

                      OPERATING COVENANTS OF THE OWNER

           SECTION 7.01.   Liens.  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 the
 Indenture, the rights of any Lessee under a Lease permitted hereunder and
 any other rights of any Person 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 and 7.03, (iii) Loan
 Participant Liens and Indenture Trustee's Liens, (iv) Liens for Taxes of
 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, (v) materialmen's, mechanics', workmen's,
 repairmen's, employees' or other like Liens arising in the ordinary course
 of 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 risk of the sale, forfeiture or loss of the Airframe or any Engine
 or any interest therein, (vi) Liens arising out of any judgment or award
 against 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 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.  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, Operation and
 Registration; Possession and Leases; Insignia.

           (a)  Registration, Maintenance, Operation and Registration.

                       (i)    Registration and Maintenance.  Owner, at
      its own cost and expense, shall (or shall cause any Lessee to):
      (A) cause the Aircraft to be duly registered in the name of Owner
      (or any Lessee), and, subject to clause (ii) of this Section
      7.02(a) and Section 7(d) of the Participation Agreement, to
      remain duly registered in the name of Owner (or any Lessee) under
      the Transportation Code, and shall not register the Aircraft or
      permit the Aircraft to be registered under any laws other than
      the Transportation Code at any time except as provided in Section
      7(d) 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; (B) maintain, service, repair and/or
      overhaul (or cause to be  maintained, serviced, repaired and/or
      overhauled) the Aircraft so as to keep the Aircraft in as good an
      operating condition as when delivered by the Seller to Owner,
      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 or during maintenance or
      modification permitted hereunder) under the Transportation Code,
      except when all Airbus Model A319 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 7(d) of
      the Participation Agreement, utilizing, except during any period
      that a Lease is in effect, the same manner and standard of
      maintenance, service, repair or overhaul used by Owner with
      respect to similar aircraft operated by Owner in similar
      circumstances and utilizing, during any period that a Lease is in
      effect, the same manner and standard of maintenance (including
      inspections), service, repair or overhaul used by the Lessee with
      respect to similar aircraft operated by the Lessee in similar
      circumstances; and (C) maintain or cause to be maintained in
      English 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.  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 over the Aircraft, or
      in violation of any airworthiness certificate, license or
      registration relating to the Aircraft issued by any such
      authority, except to the extent 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 involve any material risk of
      sale, forfeiture or loss of the Aircraft.  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
      Owner to comply with the provisions of this sentence shall not
      give rise to an Event of Default hereunder if indemnification
      complying with Section 7.04 has been provided or where such
      failure is attributable to extraordinary circumstances involving
      an isolated occurrence or series of incidents not in the ordinary
      course of the regular operations of Owner (or any Lessee) such as
      a hijacking, medical emergency, equipment malfunction, weather
      condition, navigational error or other causes beyond the
      reasonable control of Owner (or any Lessee).

           (b)  Possession and Leases.  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, and so long as Owner (or any Lessee)
 shall comply with the provisions of Section 7.02(a) and Section 7.04
 hereof, Owner may (or may permit any Lessee to), without the prior written
 consent of the Indenture Trustee:  

                       (i)    subject the Airframe and the Engines or
      engines then installed thereon to interchange agreements or any
      Engine to pooling or similar arrangements, in each case customary
      in the airline industry and entered into by Owner (or, if a Lease
      is then in effect, by Lessee) in the ordinary course of its
      business;

                       (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 hereof;

                       (iii)  install an Engine on an airframe owned
      by 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 or pooling or similar arrangements which
      would be permitted under clause (i) above, provided that the
      first priority Lien of the 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))
      the documents creating such mortgage liens or other security
      interests (or, if applicable, another written agreement governing
      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 Owner (or any Lessee) or purchased by 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 clause (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 Owner (or any Lessee), leased to Owner (or any Lessee) or
      purchased by Owner (or any Lessee) subject to a conditional sale
      or other security agreement under circumstances where neither
      clause (iii) nor clause (iv) of this paragraph (b) is applicable,
      provided that such installation shall be deemed an Event of Loss
      with respect to such Engine and Owner shall (or shall cause any
      Lessee to) comply with Section 5.06(b) in respect thereof;

                       (vi)   [Reserved.]

                       (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
      Government or any instrumentality or agency thereof pursuant to
      the Civil Reserve Air Fleet Program, so long as 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
      4.04(a) 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) [Reserved.]

                       (ix)   transfer possession of the Airframe or
      any Engine to the United States Government or any instrumentality
      or agency thereof pursuant to a contract, a copy of which shall
      be provided to the Indenture Trustee; or 

                       (x)    enter into any Lease with (A) any U.S.
      Domiciled Person, (B) any Permitted Sublessee or (C) any other
      Person approved in writing by the Indenture Trustee, which
      approval shall not be unreasonably withheld; provided, however,
      that no Lease entered into pursuant to this clause (x) shall (i)
      be to a Lessee that, at the time of entering into such Lease, is
      subject to bankruptcy, insolvency, liquidation, reorganization,
      dissolution or similar proceedings; and provided, further, with
      respect to a sublease under subclauses (B) or (C) of this clause
      (x), Owner shall deliver to the Indenture Trustee an opinion of
      counsel to the effect that (I) the terms of the Lease, including
      the subordination provisions thereof, constitute valid and
      binding obligations of the Lessee and (subject to customary
      bankruptcy and equitable remedies exceptions and to other similar
      exceptions customary in such opinions) enforceable against Lessee
      (it being understood that such opinion may be an opinion as to
      the form of the Lease only and may assume due authorization,
      execution, delivery, requisite approvals and absence of conflicts
      with laws, contracts or organizational documents) under the laws
      of the jurisdiction governing the sublease, (II) that there is no
      tort liability of the owner of an aircraft not in possession
      thereof under the laws of the jurisdiction of the proposed Lessee
      other than tort liability which might have been imposed on such
      owner under the laws of the United States or any state thereof
      (it being understood that in the event such opinion cannot be
      given such opinion requirement shall be waived if insurance
      reasonably satisfactory to the Indenture Trustee, in its
      individual capacity, is proved at Lessee's expense), and (III)
      unless Owner shall have agreed to provide insurance covering the
      risk of requisition of use of the Aircraft by the government of
      the jurisdiction of the proposed Lessee, that 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 the Aircraft in the event of the
      requisition by such government of such use. 

           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
 subject and subordinate to, and any Lease permitted by this paragraph (b)
 shall be expressly subject and subordinate to the Indenture Trustee's
 rights to repossess and to void such Lease upon such repossession, and
 Owner shall remain primarily liable hereunder for the performance of all of
 the terms of this Indenture and the terms of any such Lease shall not
 permit any Lessee to take any action not permitted to be taken by Owner
 hereunder 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 Owner's obligations
 hereunder or constitute a waiver of the Indenture Trustee's rights or
 remedies hereunder.  

           Any Wet Lease or similar arrangement under which Owner maintains
 operational control of the Aircraft shall not constitute a delivery,
 transfer or relinquishment of possession of the Aircraft for purposes of
 this section. 

           (c)  Insignia.  On or prior to the Delivery Date, or as soon as
 practicable thereafter, 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 under the
 Operative Documents).  Except as above provided, Owner 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 Owner (or any Lessee) from
 placing its customary 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.  Owner, 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 7.03 or if the Airframe or an
 Engine to which a Part relates has suffered an Event of Loss.  In addition,
 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 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 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 the property of Owner, no matter where located.  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), such
 replacement Part shall become subject to the Lien of this 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 title to the replaced Part
 shall thereupon vest in Owner (or, if a Lease is then in effect, any
 Lessee), free and clear of the Lien of this Indenture 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 7.03 may be subjected
 by Owner (or any Lessee) to a normal pooling arrangement customary in the
 airline industry of which Owner (or, if a Lease is then in effect, any
 Lessee) is a party entered into in the ordinary course of 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 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 Owner (or any
 Lessee), at its expense, as promptly thereafter as practicable, either (i)
 causes title to such replacement Part to vest in Owner in accordance with
 such paragraph (a) 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 Owner (or any Lessee) 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 Owner in
 accordance with such paragraph (a).

           (c)  Alterations, Modifications and Additions.  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 applicable
 regulatory agency or body of any other jurisdiction in which the Aircraft
 may then be registered as permitted by Section 7(d) of the Participation
 Agreement; provided, however, that 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, 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 Owner (or any Lessee) may deem desirable in
 the proper conduct of its business, including, without limitation, removal
 of Parts which 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 (it being agreed that the
 modification that makes an Engine a CFM 56-5B-5/P engine shall be deemed
 not to diminish the value, utility and remaining useful life of an Engine),
 assuming the Airframe or such Engine was then in the condition required to
 be maintained by the terms of this 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 $350,000 in aggregate value at
 the time of removal.  Owner (or any Lessee) may remove or suffer to be
 removed any Part incorporated or installed in or attached or added to the
 Airframe or an Engine as the result of any such alteration or modification,
 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 7.02 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. 

           (d)  Certain Matters Regarding Passenger Convenience Equipment. 
 Owner may install on the Airframe, subject to the requirements of Section
 7.03(c) above, Passenger Convenience Equipment that is (i) owned by another
 Person and leased to Owner, (ii) sold to Owner by another Person subject to
 a conditional sale contract or other retained security interest,
 (iii) leased to Owner pursuant to a lease which is subject to a security
 interest in favor of another Person or (iv) installed on the Aircraft
 subject to a license granted to Owner by another Person, and in any such
 case (A) the Indenture Trustee will not acquire or claim, as against any
 such other Person, any right, title or interest in any such Passenger
 Convenience Equipment solely as a result of its installation on the
 Airframe, (B) Owner shall notify such Person of the Indenture Trustee's
 respective interest in the Aircraft, and (C) upon the occurrence of any
 default under the applicable lease, conditional sale agreement, security
 agreement or license, such Person shall not be entitled to repossess such
 Passenger Convenience Equipment unless it shall, in connection with such
 repossession, undertake to restore the Aircraft to the condition it would
 have been in had the installation of such Passenger Convenience Equipment
 not occurred.

           SECTION 7.04.   Insurance.

           (a)  Owner's Obligation to Insure.  Owner shall comply with, or
 cause to be complied with, each of the provisions of Exhibit B, which
 provisions are hereby incorporated by this reference as if set forth in
 full herein.

           (b)  [Reserved.]

           (c)  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 written consent of the Indenture Trustee, other
 government of registry of the Aircraft or agency or instrumentality
 thereof, against such risk in an amount which, when added to the amount of
 insurance against such risk maintained by Owner (or any Lessee) shall be at
 least equal to the amount of insurance against such risk otherwise required
 by this Section 7.04 (taking into account self-insurance permitted by
 Exhibit B hereto).

           (d)  Application of Payments During Existence of an Event of
 Default. Any amount referred to in paragraph (b) of Exhibit B hereto which
 is payable to or retainable by Owner (or any Lessee) shall not be paid to
 or retained by 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 Owner hereunder if the Indenture Trustee declares this
 Indenture to be in default pursuant to Section 4.02 hereof, applied against
 Owner'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
 Owner 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 Owner, the Indenture Trustee, or its authorized representatives,
 may inspect the Aircraft and inspect and make copies of the books and
 records of Owner and any Lessee required to be maintained by the FAA or the
 regulatory agency or body of another jurisdiction in which the Aircraft is
 then registered relating to the maintenance of the Aircraft (the Indenture
 Trustee's risk and expense) and shall keep any information or copies
 obtained thereby confidential and shall not disclose the same to any
 Person, except (A) to the Certificate Holders and to prospective and
 permitted transferees of the Certificate Holders' or the Indenture
 Trustee's interest (and such prospective and permitted transferee's
 counsel, independent insurance advisors or other agents) who agree to hold
 such information confidential, (B) to the Certificate Holders' or the
 Indenture Trustee's counsel, independent insurance advisors or other agents
 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, provided, however, that any and all disclosures
 permitted by clause (C) above shall be made only to the extent necessary to
 meet the specific requirements or needs of the Persons for whom such
 disclosures are hereby permitted.  Any such inspection of the Aircraft
 shall be subject to Owner's safety and security rules applicable to the
 location of the Aircraft, shall be a visual, walk-around inspection of the
 interior and exterior of the Aircraft and shall not include opening any
 panels, bays or the like without the express consent of Owner (except in
 connection with a heavy maintenance visit when a panel, bay or the like is
 scheduled or required to be opened), which consent Owner may in its sole
 discretion withhold; provided that no exercise of such inspection right
 shall interfere with the normal operation or maintenance of the Aircraft
 by, or the business of, 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.  Except
 during the continuance of an Event of Default, all inspections by the
 Indenture Trustee and its authorized representatives provided for under
 this Section 7.05 shall be limited to one (1) inspection of any kind
 contemplated by this Section 7.05 during any calendar year.  

           SECTION 7.06.   Filings; Delivery of Financial Statements.

            Forthwith upon the execution and delivery of each Indenture
 Supplement from time to time required by the terms hereof and upon
 execution and delivery of any amendment to this Indenture, Owner will cause
 such Indenture Supplement (and, in the case of the initial Indenture
 Supplement and the 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.  Owner agrees to furnish to
 the Indenture Trustee promptly after execution and delivery of any
 supplement and amendment hereto (except for any such supplement or
 amendment which does not require or receive the approval of Owner pursuant
 to the Operative Documents and is not required pursuant to the terms of the
 Operative Documents), an opinion of counsel (which may be Owner's General
 Counsel, Deputy General Counsel, Assistant General Counsel or Associate
 General Counsel) reasonably satisfactory to the Indenture Trustee as to the
 due recording or filing of such supplement or amendment.  Owner will
 deliver to the Indenture Trustee (a) within sixty (60) days after the end
 of each of the first three quarterly periods of each fiscal year of Owner,
 the publicly filed Form 10-Q report of Owner; and (b) within one hundred
 twenty (120) days after the close of such fiscal year, the publicly filed
 annual report and Form 10-K report of Owner. 


                                ARTICLE VIII

                INDEMNIFICATION OF INDENTURE TRUSTEE BY OWNER

           SECTION 8.01.   Scope of Indemnification.

           Owner hereby agrees, except as otherwise provided in Section
 2.04(b) 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 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 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 Indenture Estate or the action or inaction of the
 Indenture Trustee hereunder.  Notwithstanding the foregoing, the Indenture
 Trustee shall not be entitled to any indemnification for any 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 Section 6(b) of the Participation
 Agreement from Owner's indemnities under such Section.  In addition, if
 necessary, the Indenture Trustee shall be entitled to indemnification from
 the 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 Owner 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 Indenture Estate.  Owner shall be subrogated to the
 Indenture Trustee's rights, if any, to payment from Owner for amounts
 payable by the Owner under this Section 7.01. 


                                 ARTICLE IX

                       SUCCESSOR AND SEPARATE TRUSTEES

           SECTION 9.01.   [Reserved.]

           SECTION 9.02.   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
 Owner and each Note Holder, such resignation to be effective upon the
 acceptance of the trusteeship by a successor Indenture Trustee.  In
 addition, a Majority in Interest of Note Holders may at any time (but only
 with the consent of Owner, which consent shall not be unreasonably
 withheld, except that such consent shall not be necessary if an Event of
 Default shall have occurred and be continuing) remove the Indenture Trustee
 without cause by an instrument in writing delivered to Owner and the
 Indenture Trustee, and the Indenture Trustee shall promptly notify each
 Note 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 Note 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 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, Owner or any Note 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 predecessor Indenture Trustee and Owner 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
 United States 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 9.02, be a successor Indenture Trustee and the Indenture Trustee
 under this Indenture without further act.

           SECTION 9.03.   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 Indenture Estate shall be situated or to make any
 claim or bring any suit with respect to or in connection with the Indenture
 Estate, this Indenture, any other Indenture Agreement, the Equipment Notes
 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 Note Holders
 (and the Indenture Trustee shall so advise Owner), or (iii) the Indenture
 Trustee shall have been requested to do so by a Majority in Interest of
 Note Holders, then in any such case, the Indenture Trustee and, upon the
 written request of the Indenture Trustee, 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 Indenture Estate, or to act
 as separate trustee or trustees of all or any part of the Indenture Estate,
 in each case with such rights, powers, duties and obligations consistent
 with this Indenture as may be provided in such supplemental indenture or
 other instruments as the Indenture Trustee or a Majority in Interest of
 Note 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 9.03.  If Owner shall not have
 taken any action requested of it under this Section 9.03(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 9.03(a) without the
 concurrence of Owner; and 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 9.03(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 9.03(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 9.03(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 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 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 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 Note 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 9.03
 shall be subject to, and shall have the benefit of Articles IV through IX
 and Article XI hereof insofar as they apply to the Indenture Trustee.  The
 powers of any additional or separate trustee appointed pursuant to this
 Section 9.03 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 Note Holders, or in the event
 that the Indenture Trustee shall have been requested to do so in writing by
 a Majority in Interest of Note Holders, the Indenture Trustee and, upon the
 written request of the Indenture Trustee, 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 Owner under this Section 9.03(c)
 when and to the extent it could so act under Section 9.03(a) hereof. 


                                  ARTICLE X

                SUPPLEMENTS AND AMENDMENTS TO THIS INDENTURE
                            AND OTHER DOCUMENTS  

           SECTION 10.01.  Instructions of Majority; Limitations.

           (a)  Except with respect to Excluded Payments, Owner agrees it
 shall not enter into any amendment of or supplement to Article 12 of the
 Purchase Agreement (to the extent assigned by the Purchase Agreement
 Assignment), the Purchase Agreement Assignment, the Consent and Agreement,
 or execute and deliver any written waiver or modification of, or consent
 under, the terms of the Lease, the Purchase Agreement (to the extent
 assigned by the Purchase Agreement Assignment), the Purchase Agreement
 Assignment, the Consent and Agreement, unless such supplement, amendment,
 waiver, modification or consent is consented to in writing by the Indenture
 Trustee and a Majority in Interest of Note Holders.  

           (b)  Without limiting the provisions of Section 10.01(a) hereof
 the Indenture Trustee agrees with the Note Holders that it shall not enter
 into any amendment, waiver or modification of, supplement or consent to
 this Indenture, the Purchase Agreement (to the extent assigned by the
 Purchase Agreement Assignment), the Purchase Agreement Assignment, the
 Consent and Agreement or the Participation Agreement, or any other
 agreement included in the Indenture Estate, unless such supplement,
 amendment, waiver, modification or consent is consented to in writing by a
 Majority in Interest of Note Holders, or does not adversely effect the Note
 Holders, but upon the written request of a Majority in Interest of Note
 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 Owner or, as may be
 appropriate, the Manufacturer; provided, however, that, without the consent
 of each holder of an affected Equipment Note then outstanding, no such
 amendment of or supplement to this Indenture, the Purchase Agreement (to
 the extent assigned by the Purchase Agreement Assignment), the Purchase
 Agreement Assignment, the Consent and Agreement 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, 4.04(c), 4.04(d), 5.02 or 5.06
 hereof, the definitions of "Event of Default", "Default", "Majority in
 Interest of Note Holders", "Make-Whole Amount" or "Note Holder", or the
 percentage of Note 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 Equipment Note, 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 Note Holders and
 Owner, (iii) reduce, modify or amend any indemnities in favor of the Note
 Holders, (iv) consent to any change in the Indenture which would permit
 redemption of Equipment Notes earlier than permitted under Section 2.10 or
 2.11 hereof or the purchase of the Equipment Notes or (v) permit the
 creation of any Lien on the Indenture Estate or any part thereof other than
 Permitted Liens or deprive any Note Holder of the benefit of the Lien of
 this Indenture on the Indenture Estate, except as provided in connection
 with the exercise of remedies under Article IV hereof.  Without the consent
 of Owner, no amendment or supplement to this Indenture or waiver or
 modification of the terms hereof shall adversely affect Owner. 

           (c)  At any time after the date hereof, Owner and the Indenture
 Trustee may enter into one or more agreements supplemental hereto without
 the consent of any Note Holder for any of the following purposes: (i) (a)
 to cure any defect or inconsistency herein or in the Equipment Notes, or to
 make any change not inconsistent with the provisions hereof (provided that
 such change does not adversely affect the interests of any Note Holder in
 its capacity solely as Note Holder) or (b) to cure any ambiguity or correct
 any mistake; (ii) 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 Note Holders in its
 capacity solely as Note Holder; (iv) to correct or amplify the description
 of any property at any time subject to the Lien of this 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 Indenture, the
 Airframe or Engines or any Replacement Airframe or Replacement Engine; (v)
 to add to the covenants of Owner for the benefit of the Note Holders, or to
 surrender any rights or power herein conferred upon Owner; (vi) to add to
 the rights of the Note Holders; and (vii) to include on the Equipment Notes
 any legend as may be required by law. 

           SECTION 10.02.  Trustees 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 Indenture, such
 institution may in its discretion decline to execute such document. 

           SECTION 10.03.  Documents Mailed to Note 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 Owner and to each Note Holder at its address last set forth in
 the Equipment Note 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 Indenture Supplement. 

           No written request or consent of the Indenture Trustee or the
 Note Holders pursuant to Section 10.01 hereof shall be required to enable
 Owner to enter into any Indenture Supplement specifically required by the
 terms hereof. 


                                 ARTICLE XI

                                MISCELLANEOUS

           SECTION 11.01.  Termination of 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 Equipment Notes and provided that there shall then be no
 other Secured Obligations due to the Note Holders, the Indenture
 Indemnitees and the Indenture Trustee hereunder or under the Participation
 Agreement, Owner shall direct the Indenture Trustee to execute and deliver
 to or as directed in writing by Owner an appropriate instrument releasing
 the Aircraft and the Engines from the Lien of this Indenture and releasing
 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 Owner; provided,
 however, that this Indenture and the trusts created hereby shall earlier
 terminate and this 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 Indenture Estate and the final
 distribution by the Indenture Trustee of all monies or other property or
 proceeds constituting part of the Indenture Estate in accordance with the
 terms hereof.  Except as aforesaid otherwise provided, this 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 Indenture Estate in Note
 Holders. 

           No holder of a Equipment Note shall have legal title to any part
 of the Indenture Estate.  No transfer, by operation of law or otherwise, of
 any Equipment Note or other right, title and interest of any Note Holder in
 and to the Indenture Estate or hereunder shall operate to terminate this
 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 Indenture Estate. 

           SECTION 11.03.  Sale of Aircraft by Indenture Trustee Is
 Binding.

           Any sale or other conveyance of the Indenture Estate, or any part
 thereof (including any part thereof or interest therein), by the Indenture
 Trustee made pursuant to the terms of this Indenture shall bind the Note
 Holders and shall be effective to transfer or convey all right, title and
 interest of the Indenture Trustee, Owner and such holders in and to such
 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. 

           SECTION 11.04.  Indenture for Benefit of Owner, Indenture
 Trustee, Note Holders and the Other Indenture Indemnitees. 

           Nothing in this Indenture, whether express or implied, shall be
 construed to give any person other than Owner, the Indenture Trustee, the
 Indenture Indemnitees and the Note Holders, any legal or equitable right,
 remedy or claim under or in respect of this 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 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 Owner, addressed to it at its office at      
           , (ii) if to the Indenture Trustee, addressed to it at its office
 at Two International Place, 4th Floor, Boston, Massachusetts 02110,
 Attention: Corporate Trust Department (Telecopy No. (617) 664-5371), (iii)
 if to any Participant, Owner or any Note 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 Equipment Note Register.  Whenever any
 notice in writing is required to be given by Owner, any Participant, the
 Indenture Trustee or any Note 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 Indenture. 

           SECTION 11.06.  Severability. 

           Any provision of this 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 Indenture or the Equipment Notes may
 be changed, waived, discharged or terminated orally, but only by an
 instrument in writing signed by Owner and the Indenture Trustee, in
 compliance with Section 10.01 hereof.  Any waiver of the terms hereof or of
 any Equipment Note shall be effective only in the specific instance and for
 the specific purpose given. 

           SECTION 11.08.  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 Note Holder shall bind the successors and assigns of such holder. 
 Each Note Holder by its acceptance of a Equipment Note agrees to be bound
 by this Indenture and all provisions of the Participation Agreement
 applicable to a Loan Participant or a Note 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 Indenture to the contrary
 notwithstanding, 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 Owner, fully to the same extent as if this Indenture were not in
 effect, including without limitation the making of loans or other
 extensions of credit to Owner for any purpose whatsoever, whether related
 to any of the transactions contemplated hereby or otherwise. 

           SECTION 11.11.  Governing Law; Counterpart Form. 

           THIS INDENTURE HAS BEEN DELIVERED IN NEW YORK, NEW YORK AND 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 INDENTURE IS BEING DELIVERED
 IN THE STATE OF NEW YORK.  This 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 Note Holders. 

           All votes of the Note Holders shall be governed by a vote of a
 Majority in Interest of Note 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 in the
 event of a case under Chapter 11 of the Bankruptcy Code in which 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.

           IN WITNESS WHEREOF, the parties hereto have caused this Indenture
 to be duly executed by their respective officers thereof duly authorized as
 of the day and year first above written. 


                           US AIRWAYS, INC. 



                           By:___________________________________
                           Name: 
                           Title: 



                           STATE STREET BANK AND TRUST COMPANY, as
                           Indenture Trustee 



                           By:____________________________________
                           Name: 
                           Title:



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

                                 EXHIBIT A 
                                     TO 
                      INDENTURE AND SECURITY AGREEMENT 

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


                            INDENTURE SUPPLEMENT 
                               (No.  N7__UW) 

           This Indenture Supplement N7__UW) dated _______ __, _____ (herein
 called this "Indenture Supplement") of US Airways, Inc.  

                            W I T N E S S E T H: 

           WHEREAS, the Indenture and Security Agreement N7__UW) dated as of
 _________ __, 199_  (as amended and supplemented to the date hereof, the
 "Indenture") between 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 Indenture relates to the Airframe and Engines
 described below, and a counterpart of the Indenture is attached hereto and
 made a part hereof and this Indenture Supplement, together with such
 counterpart of the Indenture, is being filed for recordation on the date
 hereof with the FAA as one document; 

           NOW, THEREFORE, this Indenture Supplement witnesseth that Owner
 hereby confirms that the Lien of the Indenture on the Indenture Estate
 covers all of 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          Number           Serial Number
  ------------      ------------     ----------------      --------------

    Airbus             A319

 together with all of 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 horsepower or the equivalent thereof, identified as follows:  

                               Manufacturer's 
 Manufacturer                  Model Number                 Serial Number
 ------------                  --------------               -------------

 together with all of 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 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). 

           As further security for the obligations referred to above and
 secured by the Indenture and hereby, 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 and assigns,
 for the security and benefit of the Loan Participants and of the Note
 Holders, in the trust created by the Indenture, all of the right, title and
 interest of Owner in, to and under the Lease Supplement [of even date
 herewith] covering the property described above. 

           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 Note Holders, except as
 provided in Section 2.15 and Article III of the Indenture without any
 preference, distinction or priority of any one Equipment Note 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
 Indenture. 

           This Indenture Supplement shall be construed as supplemental to
 the Indenture and shall form a part thereof.  The Indenture is each hereby
 incorporated by reference herein and is hereby ratified, approved and
 confirmed. 

           This Indenture Supplement is being delivered in the State of New
 York. 

           AND, FURTHER, Owner hereby acknowledges that the Aircraft
 referred to in this Indenture Supplement has been delivered to Owner and is
 included in the property of Owner covered by all the terms and conditions
 of the Trust Agreement, subject to the pledge and mortgage thereof under
 the Indenture.

           IN WITNESS WHEREOF, Owner has caused this Indenture Supplement to
 be duly executed by one of its officers, thereunto duly authorized, on the
 day and year first above written. 

                                 US AIRWAYS, INC. 



                                 By:_________________________________
                                 Name: 
                                 Title:



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

                                   EXHIBIT B
                                      TO
                       INDENTURE AND SECURITY AGREEMENT

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

                                   INSURANCE

      The portion of this Exhibit appearing below this text will be
 intentionally deleted from the FAA filing counterpart as the parties hereto
 deem it to contain confidential information. 

           (a)  Public Liability and Property Damage Insurance.  (1) Except
 as provided in clause (2) of this Paragraph (a), and subject to self-
 insurance to the extent permitted by subsection (d) of this Exhibit B,
 Owner will carry or cause to be carried with respect to the Aircraft at its
 or any Lessee's expense (i) comprehensive airline liability (including,
 without limitation, passenger, contractual, bodily injury and property
 damage liability) insurance (exclusive of manufacturer's product liability
 insurance) and (ii) cargo liability insurance, (A) in an amount not less
 than the greater of (x) the amounts of comprehensive airline liability
 insurance from time to time applicable to aircraft owned or leased, and
 operated by Owner (or, if a Lease is then in effect, by Lessee) of the same
 type as the Aircraft and (y) $300 million per occurrence, (B) of the type
 and covering the same risks as from time to time applicable to aircraft
 owned or leased and operated by Owner of the same type as the Aircraft, and
 (C) which is maintained in effect with insurers of recognized reputation
 and responsibility; provided, however, that Owner need not maintain such
 cargo liability insurance, or may maintain such cargo liability insurance
 in an amount less than $300 million per occurrence, so long as the amount
 of cargo liability insurance, if any, maintained with respect to the
 Aircraft is not less than the cargo liability insurance, if any, maintained
 for other Airbus Model A319 aircraft owned or leased and operated by Owner. 

           (2) During any period that the Airframe or an Engine, as the case
 may be, is on the ground and not in operation, Owner may carry or cause to
 be carried as to such non-operating property, in lieu of the insurance
 required by clause (1) above, and subject to the self-insurance to the
 extent permitted by subsection (d) hereof, insurance by insurers of 
 recognized reputation and responsibility otherwise conforming with the
 provisions of said clause (1) except that (A) the amounts of coverage shall
 not be required to exceed the amounts of comprehensive airline liability
 from time to time applicable to property owned or leased by Owner of the
 same type as such non-operating property and which is 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 leased by Owner of the same type as such non-operating
 property and which is on the ground and not in operation. 

           (b)  Insurance Against Loss or Damage to the Aircraft. 
 (1) Except as provided in clause (2) of this subsection (b), and subject to
 the provisions of subsection (d) of this Exhibit B permitting the self-
 insurance, Owner shall maintain or cause to be maintained in effect, at its
 or any Lessee's expense, with insurers of recognized responsibility, all-
 risk aircraft hull insurance covering the Aircraft and fire and extended
 coverage and all-risk aircraft hull insurance covering Engines and Parts
 while temporarily removed from the Aircraft and not replaced by similar
 components; provided that such insurance shall at all times while the
 Aircraft is subject to this Lease be for an amount (taking into account the
 self-insurance to the extent permitted by subsection (d) of this Exhibit B)
 not less than the Termination Value for the Aircraft; provided further,
 that, subject to compliance with subsection (d) of this Exhibit B, such
 all-risk property damage insurance covering Engines and Parts temporarily
 removed from an Airframe or an airframe or (in the case of Parts) an Engine
 need be obtained only to the extent available at reasonable cost (as
 reasonably determined by Owner).  In the case of a Loss with respect to an
 engine (other than an Engine) installed on the airframe in circumstances
 which do not constitute an Event of Loss with respect to the Airframe, the
 Indenture Trustee shall promptly remit any payment made to it of any
 insurance proceeds in respect of such Loss to Owner or any other third
 party that is entitled to receive such proceeds.  

           Unless an Event of Default has occurred and is continuing, all
 losses will be adjusted by Owner with the insurers.  As between the
 Indenture Trustee and 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 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 5.06(a), so much of such payments remaining, after
           reimbursement of the Indenture Trustee for reasonable costs and
           expenses, as shall not exceed the amounts payable pursuant to
           Section 5.06(a) hereof, shall be paid over to, or retained by,
           Owner (or if directed by Owner, any Lessee); or (ii) if such
           property is replaced pursuant to the last paragraph of Section
           5.06(a), such payments shall be paid over to, or retained by,
           Owner (or if directed by Owner, any Lessee), provided that Owner
           shall have fully performed or, concurrently therewith, will fully
           perform the terms of the last paragraph of Section 5.06(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 5.06(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, Owner (or if directed by Owner, any
           Lessee), provided that Owner shall have fully performed or
           concurrently therewith will fully perform the terms of Section
           5.06(b) with respect to the Event of Loss for which such payments
           are made.   

           As between the Indenture Trustee and 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 Owner (or any
 Lessee), and any balance (or if already paid for by Owner (or any Lessee),
 all such insurance proceeds) remaining after compliance with such Sections
 with respect to such loss shall be paid to Owner (or any Lessee if directed
 by Owner). 

           (2)  During any period that the Aircraft is on the ground and not
 in operation, Owner may carry or cause to be carried, in lieu of the
 insurance required by clause (1) above, and subject to self-insurance to
 the extent permitted by subsection (d) of this Exhibit B, insurance
 otherwise conforming with the provisions of said clause (1) 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 leased by Owner (or, if a Lease is
 then in effect, by Lessee) of the same type as the Aircraft similarly on
 the ground and not in operation, provided that, subject to self-insurance
 to the extent permitted by subsection (d) of this Exhibit B, Owner shall
 maintain insurance against risk of loss or damage to the Aircraft in an
 amount at least equal to the 100% of the amounts payable upon the
 occurrence of an Event of Loss pursuant to Section 5.06(a) hereof during
 such period that the Aircraft is on the ground and not in operation. 

           (3)  If Owner (or any Lessee) shall at any time operate or
 propose to operate the Aircraft, Airframe or any Engine (i) in any area of
 recognized hostilities or (ii) on international routes, and war-risk,
 hijacking or allied perils insurance is maintained by Owner (or any Lessee)
 with respect to other aircraft owned and operated by Owner (or any Lessee)
 on such routes or in such areas, Owner shall maintain or cause to be
 maintained war-risk, hijacking and related perils insurance of
 substantially the same type carried by major United States commercial air
 carriers operating the same or comparable models of aircraft on similar
 routes or in such areas and in no event in an amount less than 100% of the
 amounts payable upon the occurrence of an Event of Loss pursuant to Section
 5.06(a) hereof. 

           (c)  Reports, etc.  Owner will furnish, or cause to be furnished,
 to  the Indenture Trustee and the Pass Through Trustee, on or before the
 Delivery Date and on each annual anniversary date of Owner's applicable
 insurance, a report, signed by Owner's regular insurance broker or any
 other independent firm of insurance brokers reasonably acceptable to the
 Indenture Trustee which brokers may be in the regular employ of Owner (the
 "Insurance Brokers"), describing in reasonable detail the hull and
 liability insurance (and property insurance for detached engines and parts)
 then carried and maintained with respect to the Aircraft and stating the
 opinion of such firm that the insurance complies with the terms hereof;
 provided, that all information contained in the foregoing report shall not
 be made available by the Indenture Trustee or the Pass Through Trustee to
 anyone except (i) to prospective and permitted transferees of the Indenture
 Trustee's or the Pass Through Trustee's interest or their respective
 counsel, independent certified public accountants and independent insurance
 brokers or other agents, who agree to hold such information confidential,
 (ii) the Indenture Trustee's or the Pass Through Trustee's counsel or
 independent certified public accountants, independent insurance brokers or
 agents who agree to hold such information confidential or (iii) as may be
 required by any statute, court or administrative order or decree or
 governmental ruling or regulation; provided, however that any disclosure
 permitted by clause (iii) above shall be made only to the extent necessary
 to meet the specific requirements or needs of the Persons to whom such
 disclosures are hereby permitted.  Owner will cause such Insurance Broker
 to agree to advise the Indenture and the Pass Through Trustee in writing of
 any act or omission on the part of Owner of which it has knowledge and
 which might invalidate or render unenforceable, in whole or in part, any
 insurance on the Aircraft and to advise in writing at least thirty (30)
 days (seven (7) days in the case of war risk and allied perils coverage)
 and ten (10) days notice with respect to the Electronic Date Recognition
 Exclusion Limited Coverage Endorsement, prior to the cancellation or
 material adverse change of any insurance maintained pursuant to Section
 7.04, provided that if the notice period specified above is not reasonably
 obtainable, the Insurance Broker shall provide for as long a period of
 prior notice as shall then be reasonably obtainable.  In addition, Owner
 will also cause such Insurance Brokers to deliver to the Indenture Trustee
 and the Pass Through 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 Owner to such parties on the Delivery Date except for such
 changes in the report or the coverage consistent with the terms hereof.  In
 the event that 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, but shall be under no duty to, provide such insurance and, in
 such event, Owner shall, upon demand, reimburse the Indenture Trustee for
 the cost thereof to the Indenture Trustee. 

           (d)  Self-Insurance.  Owner may self-insure by way of deductible,
 premium adjustment or franchise provisions or otherwise (including, with
 respect to insurance maintained pursuant to subsection (b) of this Exhibit
 B, insuring for an amount that is less than 100% of the amounts payable
 upon the occurrence of an Event of Loss pursuant to Section 5.06(a) hereof)
 the risks required to be insured against pursuant to Section 7.04 under a
 program applicable to all aircraft (whether owned or leased) in Owner's
 fleet, but in no case shall the aggregate amount of self-insurance in
 regard to subsection (a) and (b) of this Exhibit B exceed for any policy
 year, with respect to all of the aircraft (whether owned or leased) in
 Owner's fleet (including, without limitation, the Aircraft), the lesser of
 (i) 50% of the highest replacement value of any single aircraft in Owner's
 fleet or (ii) 1-1/2% of the average aggregate insurable value (during the
 preceding policy year) of all aircraft (including, without limitation, the
 Aircraft) on which Owner carries insurance, unless an insurance broker of
 national standing shall certify that the standard among all other major
 United States airlines is a higher level of self-insurance, in which case
 Owner may insure the Aircraft to such higher level.  In addition to the
 foregoing right to self-insure, 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 customary in the airline industry imposed by the aircraft hull
 or liability insurer.  

           (e)  Terms of Policies.  Any policies of insurance carried in
 accordance with subsection (a) or (b) of this Exhibit B and any policies
 taken out in substitution or replacement for any of such policies (A) shall
 be amended to name the Additional Insureds as their respective interests
 may appear, (B) may provide for the self-insurance to the extent permitted
 in subsection (d) of this Exhibit B, (C) 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
 Additional Insureds, or such insurance shall lapse for non-payment of
 premium, such cancellation, lapse or change shall not be effective as to
 the Additional Insureds for thirty (30) days (ten (10) days in the case of
 war risk and allied perils coverage) after issuance to the Additional
 Insureds, 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, (D) shall provide that in respect of the respective interests
 of the Additional Insureds in such policies the insurance shall not be
 invalidated by any action or inaction of Owner (or, if any Lease is then in
 effect, any Lessee) or any other Person and shall insure the Additional
 Insureds regardless of any breach or violation of any warranty, declaration
 or condition contained in such policies by Owner (or, if any Lease is then
 in effect, any Lessee), (E) shall be primary without right of contribution
 from any other insurance which is carried by any Additional Insured, (F)
 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, (G) 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 any Additional
 Insured to the extent of any moneys due to any Additional Insured, and (H)
 shall provide that (i) in the event of a loss involving proceeds in excess
 of $5,000,000, the proceeds in respect of such loss up to an amount equal
 to100% of the amounts payable upon the occurrence of an Event of Loss
 pursuant to Section 5.06(a) hereof to the Note Holders shall be payable to
 the Indenture Trustee (so long as the Trust Indenture shall not have been
 discharged) in the manner set forth in  Sections 2.10 and 2.12 (except in
 the case of a loss with respect to an Engine installed on an airframe other
 than the Airframe, in which case 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 Indenture Trustee (so long as the Trust Indenture shall
 not have been discharged) whether such payment is made to 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 (and all earnings
 thereon) to Owner or its order, and (ii) the entire amount of any loss
 involving proceeds of $5,000,000 or less or the amount of any proceeds of
 any loss in excess of 100% of the amounts payable upon the occurrence of an
 Event of Loss pursuant to Section 5.06(a) hereof shall be paid to 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.  



                      ================================  
                                 EXHIBIT C 
                                     TO 
                      INDENTURE AND SECURITY AGREEMENT 

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

 SCHEDULE OF DOMICILES OF PERMITTED SUBLESSEES 


                Australia           Malta 
                Austria             Mexico 
                Bahamas             Netherlands 
                Belgium             New Zealand 
                Bermuda             Norway 
                Brazil              People's Republic of China 
                Canada              Philippines 
                Denmark             Portugal 
                Finland             Republic of China (Taiwan)* 
                France              Singapore 
                Germany             South Korea 
                Grenada             Spain 
                Greece              Sweden 
                Iceland             Switzerland 
                India               Thailand 
                Ireland             Tobago 
                Italy               Trinidad 
                Jamaica             Turkey 
                Japan               United Kingdom 
                Luxembourg          Venezuela 
                Malaysia                                 


             *So long as on the date of the Sublease such country and the
 United States have diplomatic relations at least as good as those in effect
 on the Delivery Date.



                                 SCHEDULE I 


                 Principal              Amount         Interest Rate
                 ---------              ------         -------------

 Series A                                                     %
 Series B                                                     %
 Series C                                                     %



                        Equipment Notes Amortization 


                                  SERIES A 

                              Aircraft: _____ 




                                  SERIES B 

                              Aircraft: _____ 




                                  SERIES C 

                              Aircraft: _____ 



                                SCHEDULE II 


                       PASS THROUGH TRUST AGREEMENT AND
                        PASS THROUGH TRUST SUPPLEMENTS

      Pass Through Trust Agreement, dated as of December 4, 1998, between US
 Airways, Inc. and State Street Bank and Trust Company, as supplemented by
 Trust Supplement No. 1998-1A, dated as of December 14, 1998, as
 supplemented by Trust Supplement No. 1998-1B, dated as of December 14,
 1998, and as supplemented by Trust Supplement No. 1998-1C, dated as of
 December 14, 1998 




EXHIBIT 4(a)(xx)                                     CUSIP No. 90332U AA 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 the registered owner 
hereof, Cede & Co., has an interest herein.



                   US AIRWAYS PASS THROUGH TRUST 1998-1A
       6.85% US Airways Pass Through Certificate, Series 1998-1A

                   Issuance Date: December 14, 1998

           Final Expected Distribution Date: January 30, 2018

       Evidencing A Fractional Undivided Interest In The US Airways
       Pass Through Trust 1998-1A, The Property Of Which Includes
       Certain Equipment Notes Each Secured By An Aircraft Leased
       To Or Owned By US Airways, Inc.


Certificate
No. 1         $200,000,000 Fractional Undivided Interest representing
               0.000272862% of the Trust per $1,000 face amount

     THIS CERTIFIES THAT Cede & Co., for value received, is the registered 
owner of a $200,000,000 (Two Hundred Million Dollars) Fractional Undivided 
Interest in the US Airways Pass Through Trust 1998-1A (the "Trust") created 
by State Street Bank and Trust Company, as trustee (the "Trustee"), pursuant 
to a Pass Through Trust Agreement, dated as of December 4, 1998 (the "Basic 
Agreement"), between the Trustee and US Airways, Inc., a Delaware corporation 
(the "Company"), as supplemented by Trust Supplement No. 1998-1A thereto, 
dated as of December 14, 1998 (the "Trust Supplement" and, together with the 
Basic Agreement, the "Agreement"), between the Trustee 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 "6.85% US Airways Pass 
Through Certificates, Series 1998-1A" (herein called the "Certificates").  
This Certificate is issued under and is subject to the terms, provisions and 
conditions of the Agreement.  By virtue of its acceptance hereof, the 
Certificateholder of this Certificate assents to and agrees to be bound by 
the provisions of the Agreement and the Intercreditor Agreement.  The 
property of the Trust includes certain Equipment Notes and all rights of the 
Trust to receive payments under the Intercreditor Agreement and any Liquidity 
Facility (the "Trust Property").  Each issue of the Equipment Notes is 
secured by, among other things, a security interest in an 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.

     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 January 30 and July 30 (a "Regular Distribution Date") 
commencing January 30, 1999, 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 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.  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 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 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 therein, 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 issued in a 
different denomination.  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 and Investor, 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.

     Any Person acquiring or accepting this Certificate or an interest herein 
will, by such acquisition or acceptance, be deemed to have represented and 
warranted 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"), have not been used to purchase this 
Certificate or an interest herein or (ii) the purchase and holding of this 
Certificate or interest herein are exempt from the prohibited transaction 
restrictions of ERISA and the Code pursuant to one or more prohibited 
transaction statutory or administration exemptions.

     THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND 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.

     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.


                    US AIRWAYS PASS THROUGH TRUST 1998-1A

                    By: STATE STREET BANK AND TRUST COMPANY,
                           as Trustee


                         By:_________________________________
                            Name:
                            Title:
















































                THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION


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


                         By:  STATE STREET BANK AND TRUST COMPANY,
                                 as Trustee


                               By:  _______________________________
                                    Name:
                                    Title:
Dated: December 14, 1998
















































                                                     CUSIP No. 90332U AA 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 the registered owner 
hereof, Cede & Co., has an interest herein.



                     US AIRWAYS PASS THROUGH TRUST 1998-1A
           6.85% US Airways Pass Through Certificate, Series 1998-1A

                       Issuance Date: December 14, 1998

             Final Expected Distribution Date: January 30, 2018

         Evidencing A Fractional Undivided Interest In The US Airways
         Pass Through Trust 1998-1A, The Property Of Which Includes
         Certain Equipment Notes Each Secured By An Aircraft Leased
         To Or Owned By US Airways, Inc.


Certificate
No. 2            $166,486,000 Fractional Undivided Interest representing
                  0.000272862% of the Trust per $1,000 face amount

     THIS CERTIFIES THAT Cede & Co., for value received, is the registered 
owner of a $166,486,000 (One Hundred Sixty-Six Thousand Four Hundred Eighty-
Six Dollars) Fractional Undivided Interest in the US Airways Pass Through 
Trust 1998-1A (the "Trust") created by State Street Bank and Trust Company, 
as trustee (the "Trustee"), pursuant to a Pass Through Trust Agreement, dated 
as of December 4, 1998 (the "Basic Agreement"), between the Trustee and US 
Airways, Inc., a Delaware corporation (the "Company"), as supplemented by 
Trust Supplement No. 1998-1A thereto, dated as of December 14, 1998 (the 
"Trust Supplement" and, together with the Basic Agreement, the "Agreement"), 
between the Trustee 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 "6.85% US Airways Pass Through Certificates, 
Series 1998-1A" (herein called the "Certificates").  This Certificate is 
issued under and is subject to the terms, provisions and conditions of the 
Agreement.  By virtue of its acceptance hereof, the Certificateholder of this 
Certificate assents to and agrees to be bound by the provisions of the 
Agreement and the Intercreditor Agreement.  The property of the Trust 
includes certain Equipment Notes and all rights of the Trust to receive 
payments under the Intercreditor Agreement and any Liquidity Facility (the 
"Trust Property").  Each issue of the Equipment Notes is secured by, among 
other things, a security interest in an 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.

     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 January 30 and July 30 (a "Regular Distribution Date") 
commencing January 30, 1999, 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 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.  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 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 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 therein, 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 issued in a 
different denomination.  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 and Investor, 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.

     Any Person acquiring or accepting this Certificate or an interest herein 
will, by such acquisition or acceptance, be deemed to have represented and 
warranted 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"), have not been used to purchase this 
Certificate or an interest herein or (ii) the purchase and holding of this 
Certificate or interest herein are exempt from the prohibited transaction 
restrictions of ERISA and the Code pursuant to one or more prohibited 
transaction statutory or administration exemptions.

     THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY AND 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.

     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.


                         US AIRWAYS PASS THROUGH TRUST 1998-1A

                         By:  STATE STREET BANK AND TRUST COMPANY,
                                  as Trustee


                              By:  _______________________________
                                   Name:
                                   Title:













































             THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION


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


                   By:  STATE STREET BANK AND TRUST COMPANY,
                           as Trustee


                        By:  _____________________________
                             Name:
                             Title:
Dated: December 14, 1998






EXHIBIT 4(a)(xxi)                           CUSIP No. 90332U AB 9

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.



US AIRWAYS PASS THROUGH TRUST 1998-1B
     7.35% US Airways Pass Through Certificate, Series 1998-1B

               Issuance Date: December 14, 1998

       Final Expected Distribution Date: January 30, 2018

              Evidencing A Fractional Undivided
              Interest In The US Airways Pass Through 
              Trust 1998-1B, The Property Of Which 
              Includes Certain Equipment Notes Each 
              Secured By An Aircraft Leased To Or Owned 
              By US Airways, Inc.


Certificate
No. 1          $81,282,000 Fractional Undivided Interest
               representing 0.001230284% of the Trust per $1,000 
               face amount

          THIS CERTIFIES THAT Cede & Co., for value received, is 
the registered owner of a $81,282,000 (Eighty-One Million Two 
Hundred Eighty-Two Thousand Dollars) Fractional Undivided 
Interest in the US Airways Pass Through Trust 1998-1B (the 
"Trust") created by State Street Bank and Trust Company, as 
trustee (the "Trustee"), pursuant to a Pass Through Trust 
Agreement, dated as of December 4, 1998 (the "Basic Agreement"), 
between the Trustee and US Airways, Inc., a Delaware corporation 
(the "Company"), as supplemented by Trust Supplement No. 1998-1B 
thereto, dated as of December 14, 1998 (the "Trust Supplement" 
and, together with the Basic Agreement, the "Agreement"), between 
the Trustee 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 "7.35% US Airways Pass Through Certificates, Series 1998-1B" 
(herein called the "Certificates").  This Certificate is issued 
under and is subject to the terms, provisions and conditions of 
the Agreement.  By virtue of its acceptance hereof, the 
Certificateholder of this Certificate assents to and agrees to be 
bound by the provisions of the Agreement and the Intercreditor 
Agreement.  The property of the Trust includes certain Equipment 
Notes and all rights of the Trust to receive payments under the 
Intercreditor Agreement and any Liquidity Facility (the "Trust 
Property").  Each issue of the Equipment Notes is secured by, 
among other things, a security interest in an 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.

           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 
January 30 and July 30 (a "Regular Distribution Date") commencing 
January 30, 1999, 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 
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.  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 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 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 therein, 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 issued in a different 
denomination.  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 and Investor, 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.

          Any Person acquiring or accepting this Certificate or 
an interest herein will, by such acquisition or acceptance, be 
deemed to have represented and warranted 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"), have not been used 
to purchase this Certificate or an interest herein or (ii) the 
purchase and holding of this Certificate or interest herein are 
exempt from the prohibited transaction restrictions of ERISA and 
the Code pursuant to one or more prohibited transaction statutory 
or administration exemptions.

         THE AGREEMENT AND THIS CERTIFICATE SHALL BE GOVERNED BY 
AND 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.

         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.


         US AIRWAYS PASS THROUGH TRUST 1998-1B

                   By:  STATE STREET BANK AND TRUST COMPANY,
                                as Trustee

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

THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION


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


                  By:  STATE STREET BANK AND TRUST COMPANY,
                                as Trustee


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

Dated: December 14, 1998






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