POLARIS AIRCRAFT INCOME FUND IV
8-K/A, 1997-08-18
EQUIPMENT RENTAL & LEASING, NEC
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                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549



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

                                    FORM 8-K/A

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



                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


         Date of report (date of earliest event reported): May 28, 1997

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

                          Commission File No. 33-15551

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




                        POLARIS AIRCRAFT INCOME FUND IV,
                        A California Limited Partnership


                        State of Organization: California
                   IRS Employer Identification No. 94-3039169
         201 Mission Street, 27th Floor, San Francisco, California 94105
                           Telephone - (415) 284-7400













                       This document consists of 65 pages.





<PAGE>







Item 7.     Financial Statements, Pro Forma Financial Information and Exhibits.

       a)   Financial Statements.        None

       b)   Pro Forma Information.       None

       c)   Exhibits.

            2.1      Purchase, Assignment and Assumption Agreement - attached *
            2.2      Escrow Agreement **
            2.3      Pledge and Security Agreement **
            2.4      Keep Well Agreement **
            2.5      Promissory Note **
            2.6      Guaranty (Keep Well) **
            2.7      Guaranty (SPV Indebtedness) **


*Exhibit 2.1 which was filed on June 12, 1997 with the original  Current  Report
on Form 8-K dated May 28, 1997 was  incomplete in that all of the schedules were
inadvertently  omitted. The complete document,  including all schedules,  is now
attached.

**Exhibits  2.2  through  2.7 were  previously  filed on June 12,  1997 with the
original  Current  Report  on Form  8-K  dated  May  28,  1997  and  are  hereby
incorporated by reference.

                                        2

<PAGE>





                                    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.

                                POLARIS AIRCRAFT INCOME FUND IV
                                (Registrant)
                                By:     Polaris Investment
                                        Management Corporation,
                                        General Partner




       August 12, 1997                  By:     /S/Marc A. Meiches
- -----------------------------                   ------------------
                                                Marc A. Meiches
                                                Chief Financial Officer
                                                (principal financial officer and
                                                principal accounting officer of
                                                Polaris Investment Management
                                                Corporation, General Partner of
                                                the Registrant)


                                        3






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


                     PURCHASE, ASSIGNMENT AND ASSUMPTION AGREEMENT


                                      dated as of

                                     April 1, 1997

                                        between

                            POLARIS AIRCRAFT INCOME FUND IV

                                      as Assignor

                                          and

                            TRITON AVIATION SERVICES IV LLC

                                      as Assignee

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



<PAGE>



                                TABLE OF CONTENTS

                                                                           Page

SECTION 1.      Definitions.................................................  1

SECTION 2.      Sale and Assignment......................................... 11

SECTION 3.      Purchase and Assumption..................................... 11

SECTION 4.      Purchase Price.............................................. 11
        (a)     Payment of Purchase Price................................... 11
        (b)     Transfer of Aircraft Income and Lessee Deposits............. 12
        (c)     First Effective Date; Mop-Up Date........................... 12
        (d)     Settlement of Aircraft Income and Lessee Deposits........... 13

SECTION 5.      Representations and Warranties of Assignor; Limitation of
                Warranty; Covenant with Respect to Pre-Closing Actions...... 15
        5.1     Representations and Warranties of Assignor.................. 15
        (a)     Partnership Organization, Etc............................... 15
        (b)     Due Authorization; Non-Contravention........................ 15
        (c)     Due Execution and Delivery; Enforceability.................. 16
        (d)     Event of Default............................................ 16
        (e)     Total Loss.................................................. 16
        (f)     Taxes........................................................16
        (g)     Litigation.................................................. 17
        (h)     Encumbrances................................................ 17
        (i)     Brokers' Fees............................................... 17
        (j)     Operative Agreements.........................................18
        (k)     Title to Transferred Interests.............................. 18
        5.2     Supplements to Schedules; Post-Signing Information. ........ 18
        5.3     Limitation of Warranty...................................... 18
        5.4     Actions with Respect to Transferred Interests............... 19

SECTION 6.      Representations and Warranties of Assignee; Access Covenant. 20
        6.1     Representations and Warranties of Assignee.................. 20
        (a)     LLC Organization, Etc....................................... 20
        (b)     Due Authorization; Non-Contravention........................ 20
        (c)     Due Execution and Delivery; Enforceability...................21
        (d)     Litigation.................................................. 21
        (e)     Compliance with Operative Agreements........................ 21



                                        i



<PAGE>



        (f)     Non-Airline................................................. 21
        (g)     Brokers' Fees............................................... 21
        (h)     Acquisition For Own Account................................. 22
        6.2     Access Covenant............................................. 22

SECTION 7.      Conditions Precedent to the Obligations of Assignor......... 22
        (a)     Purchase Price.............................................. 22
        (b)     Affidavit of Limited Control by a Non-U.S. Citizen.......... 22
        (c)     Escrow Agreement............................................ 23
        (d)     TASL "Keep Well" Agreement.................................. 23
        (e)     TIL Keep Well Guaranty and Loan Guaranty.................... 23
        (f)     Assignee Security Agreement................................. 23
        (g)     Approvals and Consents...................................... 23
        (h)     Due Authorization, Execution and Delivery................... 24
        (i)     Representations and Warranties.............................. 24
        (j)     Organizational and Authorization Matters.................... 24
        (k)     Illegality; No Proceedings.................................. 25
        (l)     No Total Loss............................................... 25
        (m)     Opinions.................................................... 26
        (n)     Location of Aircraft........................................ 26
        (o)     TIL Balance Sheets.......................................... 26
        (p)     Other Instruments and Documents; Additional Information..... 26
        (q)     Outside Date................................................ 26
        (r)     No Pending Superior Proposal................................ 27

SECTION 8.      Conditions Precedent to the Obligations of Assignee......... 27
        (a)     Leases and Trust Agreements................................. 27
        (b)     Due Authorization, Execution and Delivery................... 27
        (c)     Representations and Warranties.............................. 27
        (d)     Schedules .................................................. 27
        (e)     Partnership Authorization Matters........................... 28
        (f)     Illegality; No Proceedings.................................. 28
        (g)     Approvals and Consents...................................... 29
        (h)     No Total Loss............................................... 29
        (i)     Opinions.................................................... 29
        (j)     Location of Aircraft........................................ 29
        (k)     Other Instruments and Documents; Additional Information..... 29
        (l)     Outside Date................................................ 30

SECTION 9.      Payments.................................................... 30



                                       ii



<PAGE>



SECTION 10.     Certain Notices.............................................. 30

SECTION 11.     Superior Proposal............................................ 31

SECTION 12.     Further Assurances........................................... 31

SECTION 13.     Taxes and Indemnities........................................ 32
        (a)     Transfer Taxes............................................... 32
        (b)     Notice of IRS Reports........................................ 32
        (c)     Assignor's Indemnity......................................... 33
        (d)     Assignee's Indemnity......................................... 34
        (e)     Survival of Representations and Warranties................... 35

SECTION 14.     Indemnification Procedure.................................... 35

SECTION 15.     Termination.................................................. 37

SECTION 16.     Miscellaneous................................................ 37
        (a)     Notices...................................................... 37
        (b)     Headings..................................................... 38
        (c)     References................................................... 39
        (d)     GOVERNING LAW................................................ 39
        (e)     Severability................................................. 39
        (f)     Amendments in Writing........................................ 39
        (g)     Expenses..................................................... 39
        (h)     Execution in Counterparts.................................... 40
        (i)     Entire Agreement............................................. 40
        (j)     Exhibits..................................................... 40
        (k)     Assignment and Successors.................................... 40
        (l)     Confidentiality.............................................. 40



                                       iii



<PAGE>



EXHIBITS

Exhibit A       --    Form of Promissory Note
Exhibit B       --    Form of TASL Keep Well
Exhibit C-1     --    Form of TIL Keep Well Guaranty
Exhibit C-2     --    Form of TIL Loan Guaranty
Exhibit D       --    Form of Pledge and Security Agreement
Exhibit E       --    Form of SPV Provisions


SCHEDULES

Schedule 1            --     Aircraft
Schedule 2            --     Leases
Schedule 3            --     Foreign Aircraft Engines
Schedule 4            --     Other Operative Agreements
Schedule 4(a)         --     Purchase Price
Schedule 5            --     Owner Trustees
Schedule 5(b)         --     Consents
Schedule 5(d)         --     Assignor Claims
Schedule 5(g)         --     Pending Litigation
Schedule 5(h)         --     Liens
Schedule 5(j)         --     Missing Documents
Schedule 6            --     Trust Agreements
Schedule 7            --     Unfunded Commitments



                                         iv



<PAGE>



                This PURCHASE,  ASSIGNMENT AND ASSUMPTION AGREEMENT (as the same
may be amended,  modified or supplemented from time to time, this  "Agreement"),
dated as of April 1, 1997, is by and between POLARIS  AIRCRAFT INCOME FUND IV, a
California  limited  partnership  ("Assignor"),  and TRITON AVIATION SERVICES IV
LLC, a California limited liability company ("Assignee").

                              W I T N E S S E T H:

                WHEREAS,  Assignor  desires to sell and assign to  Assignee  and
Assignee  desires to purchase and assume from Assignor all of Assignor's  right,
title and interest in and to the Transferred Interests;

                NOW,  THEREFORE,  in consideration of the foregoing premises and
the mutual  covenants  and  agreements of the parties  contained  herein and for
other good and  valuable  consideration,  the receipt and  adequacy of which are
hereby acknowledged, Assignor and Assignee agree as follows:


SECTION 1.      Definitions

                In addition to the terms defined elsewhere herein,  when used in
this Agreement, the following terms have the meanings indicated below:

                "Act" means Part A of subtitle  VII of title 49,  United  States
Code.

                "actual knowledge" of any Person,  means the conscious awareness
of facts or other  information  by any director,  officer,  employee or agent of
such Person,  in either such case,  who is (i) actively  involved in negotiating
the  transactions  contemplated  by this Agreement or (ii)  responsible,  in the
ordinary  course,  for  administering,  on behalf of Assignor,  the transactions
contemplated by the Operative Agreements.

                "Affiliate"  means, with respect to any Person,  (i) each Person
that, directly or indirectly,  owns or controls,  whether  beneficially or  as a
trustee,  guardian or other fiduciary,  20% or more of the Stock having ordinary
voting power in the election of directors or managers of  such Person, (ii) each
Person that  controls,  is  controlled  by or is under common  control with such
Person or any Affiliate of such Person and (iii) each of such Person's officers,
directors,  members,  joint  venturers  and  partners.  For the  purpose of this
definition,  "control"  of a Person  shall  mean  the  possession,  directly  or
indirectly,  of the power to direct or cause the direction of its  management or
policies,  whether  through the ownership of voting  securities,  by contract or
otherwise.



                                        1



<PAGE>



                "After-Tax  Basis"  means  on a  basis  such  that  any  payment
received or deemed to have been received by any Person shall be  supplemented by
a further amount paid to that Person,  so that the recipient is held harmless on
an  after-Tax  basis from all Taxes  (calculated  with  respect  to the  highest
applicable  tax rate and taking into account any related  credits or  deductions
allowed to the recipient of such payment in respect of the indemnified  matters)
resulting from the receipt (actual or  constructive)  of such payments and where
the indemnitee is treated as a partnership for federal income tax purposes,  the
"highest  applicable tax rate" means the highest  applicable federal tax rate in
effect for individuals at the time the indemnity payment is made plus 6%.

                "Agreement"  shall  have  the  meaning  assigned  to it  in  the
preamble hereof.


                "Aircraft"  means the aircraft  more fully  described on Parts A
and B of Schedule 1 attached hereto and, with respect to each Foreign  Aircraft,
shall include (i) any and all Parts installed on or attached to any such Foreign
Aircraft as of the Effective Time relating to such Foreign Aircraft  (subject to
any  pooling,  replacement  or  exchange  rights  arising  under  the  Operative
Agreements  relating to such  Foreign  Aircraft),  (ii) all  Aircraft  Documents
relating  to such  Foreign  Aircraft,  (iii) the  Engines and (iv) to the extent
assignable by Assignor, all warranties of manufacturers or other vendors of such
Foreign  Aircraft,  Engines or Parts relating  thereto that are in effect on the
Effective Date relating to such Foreign Aircraft.

                "Aircraft  Documents"  mean,  with respect to any Aircraft,  all
records,  logs,  technical  data and  manuals  relating  to the  maintenance  or
operation of such Aircraft which are owned by Assignor.

                "Aircraft Income" means, with respect to a Transferred Interest,
all  income,  scheduled  rental  payments,  payments  in  respect of fees due to
Assignor or the Owner Trustee and proceeds of such  Transferred  Interest earned
on or after April 1, 1997, but shall not be deemed to include any Lessee Deposit
or Reserved Rights associated with such Transferred Interest.

                "Allocable  Portion  Percentage"  means,  with  respect  to  any
Aircraft,  the amount  obtained by dividing the Appraised Value of such Aircraft
(determined  immediately  before  such  Aircraft  suffered  a Total Loss or such
Aircraft is otherwise  deleted from this  Agreement) by the sum of the Appraised
Values of all the Aircraft (determined at the same time).

                "Ancillary Agreements" mean, collectively,  the Promissory Note,
the  Keep  Well,  the  Keep  Well  Guaranty,  the Loan  Guaranty,  the  Security
Agreement,  the Assignment and Assumption  Agreements and all other  agreements,
instruments,   documents  and   certificates,   including,  without  limitation,


                                        2



<PAGE>



consents,  assignments,  contracts,  financing  statements and all other written
matters  whether  now or  hereafter  executed  by or on  behalf of  Assignor  or
Assignee or any of their respective  Affiliates and delivered in connection with
this Agreement or the transactions contemplated hereby.

                "Appraised Value" means, with respect to any Aircraft,  the most
recent  semi-annual  generic  current  fair market value of aircraft of the same
type, age, gross weight and configuration, including, without limitation, engine
type and hushkit  status,  published by Avitas Aircraft  Appraisal Inc.  without
adjustment for the maintenance "half-time" condition of such Aircraft.

                "Assignee" shall have the meaning assigned to it in the preamble
hereof.

                "Assignee  Acceptance Notice" shall have the meaning assigned to
it in Section 11(c) hereof.

                "Assignee  Indemnitees" shall have the meaning assigned to it in
Section 13(c) hereof.

                "Assignment  and  Assumption  Agreement"  shall  mean  (i)  each
Assignment and Assumption  Agreement  (FAA),  executed and delivered by Assignor
and  Assignee  at  the  applicable   Effective   Time,  in  form  and  substance
satisfactory to Assignee and Assignor and (ii) each Novation Agreement, executed
and delivered by Assignor and Assignee at the applicable Effective Time, in form
and substance satisfactory to Assignee and Assignor.

                "Assignor" shall have the meaning assigned to it in the preamble
hereof.

                "Assignor  Indemnitees" shall have the meaning assigned to it in
Section 13(d) hereof.

                "Assumed  Liabilities"  mean,  with respect to each  Transferred
Interest, (i) all of the obligations and liabilities of Assignor relating to the
applicable  Trust Estate and under the applicable  Trust Agreement and all other
Operative  Agreements relating to such Trust Estate or such Transferred Interest
to the extent arising from acts, omissions, events or circumstances occurring or
accruing  on or  after  the  applicable  Effective  Time  for  such  Transferred
Interest, (ii) all Deposit Liabilities relating to such Transferred Interest and
(iii) all Unfunded Commitments relating to such Transferred Interest.

                "Business Day" means any day that is not a Saturday, a Sunday or
a day on which  banks are  required or  permitted  to be closed in the States of
California or New York.


                                        3



<PAGE>



                "CAA" means the United Kingdom Civil Aviation Authority.

                "Cash Account" shall have the meaning  assigned to it in Section
4(a) hereof.

                "Citizen  of the  United  States"  means  Citizen  of the United
States as defined in Section 40102(a)(15) of the Act and in the FAA Regulations.

                "Claim Notice" shall have the meaning  assigned to it in Section
14(a) hereof.

                "Damages"  means,  in respect of any obligation to indemnify any
Person  pursuant to the terms of this  Agreement,  any and all  losses,  claims,
damages,  liabilities,  obligations,  actions,  suits,  judgments,  settlements,
awards,  reasonable and documented  out-of-pocket costs, expenses and attorneys'
fees but shall exclude any consequential,  expectancy or speculative  Damages or
any Damages based on a claim of lost profits or opportunities.

                "Daylight  Effective  Time" means any Effective Time that occurs
on a Business Day during the hours of 9:30 a.m. and 5:00 p.m. EDT, New York City
time.

                "Deposit  Liabilities"  mean, with respect to any Lessee Deposit
transferred to Assignee pursuant to this Agreement, all liabilities, obligations
and duties owed by Assignor or any Owner  Trustee to a Lessee or any assignee of
or successor to such Lessee  relating to, based on or arising out of such Lessee
Deposit, whether known or unknown, contingent or absolute, or arising before, on
or after the Effective Time applicable to such Lessee Deposit.

                "Effective  Time" means,  subject to the final  sentence of this
definition, each date and time on which any Transferred Interest is delivered by
Assignor to Assignee  and accepted by Assignee in  accordance  with the terms of
this  Agreement as specified in the  Assignment  and  Assumption  Agreement with
respect to such Transferred Interest. Each Transferred Interest may be delivered
by Assignor to Assignee  and accepted by Assignee in  accordance  with the terms
hereof  and the terms of the  applicable  Assignment  and  Assumption  Agreement
independently  of any other  Transferred  Interest  and at  different  Effective
Times.  Notwithstanding  the foregoing,  the Effective Time for each Transferred
Interest assigned to Assignee shall be deemed, with respect to the allocation of
Aircraft   Income as  between  Assignor   and  Assignee  (but  not for any other
purpose), to be April 1, 1997.

                "Engine"   means   each  of  the   engines   identified   as  to
manufacturer, type and manufacturer serial number on Schedule 3 hereto together,
in each case,  with any and all Parts  incorporated  or installed in or attached



                                        4



<PAGE>



thereto  as of the  Effective  Time  relating  to such  Engine  (subject  to any
pooling,  replacement or exchange rights arising under the Operative  Agreements
relating to such Engine).

                "Escrow  Agent"  means  the  escrow  agent  (and  any  financial
institution that succeeds such escrow agent) pursuant to the terms of the Escrow
Agreement.

                "Escrow  Agreement"  means an Escrow  Agreement  among Assignor,
Assignee and the Escrow  Agent,  in form and substance  satisfactory  to each of
them.

                "FAA" means the Federal  Aviation  Administration  of the United
States or any  Government  Entity  succeeding  to the  functions  of the Federal
Aviation Administration.

                "Foreign Aircraft" means,  collectively,  the Aircraft described
on Part B of Schedule 1.

                "Government Entity" means (a) any federal,  state, provincial or
similar  government,  and  any  body,  board,  department,   commission,  court,
tribunal,  authority,  agency or other instrumentality of any such government or
otherwise  exercising any executive,  legislative,  judicial,  administrative or
regulatory  functions  of such  government  or (b) any other  government  entity
having jurisdiction over any matter contemplated by the Operative  Agreements or
relating to the  observance  or  performance  of the  obligations  of any of the
parties to the Operative Agreements.

                "Indemnified  Party"  shall have the  meaning  assigned to it in
Section 14(a) hereof.

                "Indemnitor"  shall have the  meaning  assigned to it in Section
14(a) hereof.

                "IRS"  means the  Internal  Revenue  Service  or any  Government
Entity succeeding to the functions of the Internal Revenue Service.

                "Keep  Well"  shall have the  meaning  assigned to it in Section
7(d) hereof.

                "Keep Well  Guaranty"  shall have the meaning  assigned to it in
Section 7(e) hereof.

                "Leases"  mean,  collectively,  the Leases  listed on Schedule 2
attached  hereto,  as the same may have been amended,  supplemented  or modified
from time to time.



                                        5



<PAGE>



                "Lessee Deposit" means any security deposit, maintenance reserve
or other  funds  held by  Assignor  or any Owner  Trustee  as  security  for the
performance  by a Lessee of any of its  obligations  under a Lease or any of the
Operative  Agreements relating to such Lease (including any interest or earnings
on any such funds  which,  pursuant to such Lease or such  Operative  Agreements
relating to such Lease, are for the account or the benefit of the Lessee).

                "Lessees" mean,  collectively,  the Persons listed on Schedule 1
attached hereto.

                "Lien"  means  any  mortgage,   pledge,  lien,  charge,   claim,
encumbrance,  lease or security interest  affecting the title to or any interest
in property.

                "Loan Guaranty" shall have the meaning assigned to it in Section
7(e) hereof.

                "Loss  of  Title"  means,  with  respect  to any  Aircraft,  the
condemnation, confiscation, appropriation or seizure of, or requisition of title
to such Aircraft by any Government Entity;  provided,  however, that requisition
of the use of an Aircraft  shall not constitute a Loss of Title unless there has
also been a requisition of title to such Aircraft by a Governmental Entity.

                "Mop-Up  Date" means the seventh  (7th)  Business  Day after the
Start Date; provided,  however, that if, on the seventh (7th) Business Day after
the Start Date,  (a) Assignee gives notice to Assignor that an Aircraft which is
subject of a Transferred Interest not yet transferred to Assignee (i) is located
in a jurisdiction  that is unacceptable to Assignee and (ii) cannot be relocated
to an  acceptable  jurisdiction  because  either (x) such Aircraft is physically
unable to be so  relocated  or (y) the Lessee of such  Aircraft  has  refused to
cooperate in relocating or (b) Assignor gives notice to Assignee that it has not
yet obtained any approval or consent  listed on Schedule  5(b) in respect of any
of the  Transferred  Interests not yet  transferred  to Assignee,  then, in such
case, with respect to each such Transferral  Interest,  "Mop-Up Date" shall mean
the earlier of (A) the thirtieth (30th) day following the seventh (7th) Business
Day after the Start Date or (B) June 30, 1997.

                "Offering  Party" means any Person  making a bona fide  inquiry,
offer or proposal to acquire,  directly or indirectly,  (a) all or substantially
all of the assets  subject to the Trust  Agreements or (b) all or  substantially
all of the Transferred Interests or (c) a combination thereof.

                "Operative Agreements" means, collectively,  each of the Leases,
the Trust  Agreements,  the tax indemnity  agreements  and the other  agreements
listed  on  Schedule  4  attached  hereto,  as the same may have  been  amended,



                                        6



<PAGE>



supplemented or modified from time to time.

                "Outside Date" shall have the meaning  assigned to it in Section
7(g) hereof.

                "Owner  Trustee"  means each Owner Trustee  listed on Schedule 5
attached  hereto,  not in its  individual  capacity but solely as owner  trustee
under the applicable Trust Agreement.

                "Parts"  mean,  with respect to any Aircraft or any Engine,  all
appliances,   components,   parts,  instruments,   appurtenances,   accessories,
furnishings,  spare parts,  seats and other  equipment of whatever nature (other
than  complete  engines),  incorporated  or installed in or attached to any such
Aircraft or Engine as of the  Effective  Time  relating to any such  Aircraft or
Engine (subject to any pooling, replacement or exchange rights arising under the
Operative Agreements relating to such Aircraft or Engine).

                "Person"  means  any   Government   Entity,   individual,   sole
proprietorship,  partnership,  limited liability company, joint venture,  trust,
unincorporated  organization,   association,  corporation,  institution,  public
benefit corporation or other entity.

                "PIMC"  means  Polaris  Investment  Management  Corporation,   a
California corporation.

                "Promissory  Note"  shall  have the  meaning  assigned  to it in
Section 4(a) hereof.

                "Purchase  Price"  shall  have  the  meaning  assigned  to it in
Section 4(a) hereof.

                "Purchase  Price  Interest" means an amount equal to interest on
the "Cash  Amount" set forth on Schedule 4(a) hereto (as such Cash Amount may be
reduced pursuant to Section 4(c) or Section 4(d)(ii)), calculated for the period
from and  including  April 1, 1997 through but not  including  the date Assignor
receives the Cash Amount  pursuant to Section  4(c), at a rate equal to 5.3% per
annum.

                "Reserved   Rights"  mean,  with  respect  to  each  Transferred
Interest,  any of the right,  title or interest of Assignor in, to or in respect
of each and every indemnity or other payment or obligation  (whether in the form
of rent or otherwise),  arising in connection with any claim, cause of action or
payment  obligation  payable  to, on behalf  or in favor of  Assignor,  under or
pursuant to any Trust  Agreement or any other Operative  Agreements  relating to
such Transferred Interest (including,  without limitation,  any rights or causes



                                        7



<PAGE>



of action  Assignor may have against any Owner Trustee  pursuant to the terms of
any  Trust  Agreement)  to  the  extent  that  such  indemnities,   payments  or
obligations  vested  or  relate  to an  act,  omission,  event  or  circumstance
occurring or accruing prior to the Effective Time for such Transferred  Interest
other  than  Aircraft  Income,  Lessee  Deposits  or other  rights  specifically
transferred to Assignee pursuant to this Agreement.

                "Security  Agreement"  shall have the meaning  assigned to it in
Section 7(f) hereof.

                "SP  Notice"  shall have the  meaning  assigned to it in Section
11(b) hereof.

                "Special CAA Counsel"  shall have the meaning  assigned to it in
Section 7(o) hereof.

                "Special FAA Counsel"  shall have the meaning  assigned to it in
Section 7(o) hereof.

                "Start Date" means the earlier of (i) a date mutually acceptable
to Assignor  and Assignee or (ii) the sixth (6th)  Business Day after which,  in
the good faith  judgement of Assignor,  the  conditions  precedent  set forth in
Section  7(g),  (k) or (r) are first  satisfied  with  respect to a  Transferred
Interest.

                "Stock" means all shares, options,  warrants, general or limited
partnership interests, membership interests, participations or other equivalents
(regardless  of how  designated) of or in a  corporation,  partnership,  limited
liability company or equivalent  entity whether voting or nonvoting,  including,
without limitation,  common stock,  preferred stock,  membership interest or any
other  "equity  security" (as such term is defined in Rule 3a11-1 of the General
Rules and  Regulations  promulgated by the  Securities  and Exchange  Commission
under the Securities Exchange Act of 1934, as amended).

                "Superior  Proposal"  means  any  bona  fide  inquiry,  offer or
proposal which,  in the case of an offer or proposal,  is made by a Person that,
in the good faith judgment of Assignor,  is financially  capable of consummating
such  offer  or  proposal  to  acquire,  directly  or  indirectly,  (a)  all  or
substantially  all of the assets  subject to the Trust  Agreements or (b) all or
substantially all of the Transferred  Interests or (c) any combination  thereof,
the terms of which,  in the good faith judgment of Assignor,  provide  aggregate
present  value  consideration  to  Assignor  that is  materially  better or more
advantageous  than the  aggregate  present value  consideration  provided by the
transactions contemplated hereby; provided that in making such judgment Assignor
shall have no duty or obligation  to seek the advice of any outside  advisors or
appraisers.



                                        8



<PAGE>



                "TASL"  means  Triton  Aviation  Services  Limited,   a  Bermuda
corporation.

                "Taxes" mean 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
Entity or other taxing authority in the United States, any foreign government or
any political sub division or taxing authority thereof, any international taxing
authority or any  territory  or  possession  of the United  States or any taxing
authority thereof.

                "Threshold  Amount"  shall have the  meaning  assigned  to it in
Section 13(c) hereof.

                "TIL" means Triton Investments Limited, a Bermuda corporation.

                "Third Party  Action"  shall have the meaning  assigned to it in
Section 14(a) hereof.

                "Total Loss" means,  with  respect to any  Aircraft,  any of the
following  events:  (a) total loss of such Aircraft or the  destruction,  damage
beyond  economic  repair or rendition  of such  Aircraft  permanently  unfit for
normal use for any reason  whatsoever;  (b) any  damage to such  Aircraft  which
results in an insurance settlement with respect to such Aircraft on the basis of
a total loss or on the basis of a compromised  or  constructive  total loss; and
(c) Loss of Title.

                "Transfer  Taxes"  shall  have  the  meaning  assigned  to it in
Section 13(a) hereof.

                "Transferred  Interests" mean,  collectively,  all of Assignor's
present and future right,  title and interest in, to and under the Trust Estate,
the Trust  Agreements and all other Operative  Agreements,  all Lessee Deposits,
all Aircraft Income and all Foreign Aircraft,  but excluding,  in each case, the
Reserved  Rights.  The  term  Transferred  Interest  followed  immediately  by a
manufacturer's serial number of an Aircraft (e.g., "Transferred Interest 19711")
shall mean, in each case,  collectively,  all of  Assignor's  present and future
right, title and interest in, to and under the Trust Estate, the Trust Agreement
and other Operative Agreements,  Lessee Deposits and Aircraft Income relating to
the Aircraft bearing such manufacturer's serial number.



                                        9



<PAGE>



                "Trust  Agreements"  mean,  collectively,  each Trust  Agreement
listed  on  Schedule  6  attached  hereto,  as the same may have  been  amended,
supplemented or modified from time to time.

                "Trust Estate" means, collectively, each Trust Estate as defined
in each of the Trust Agreements.

                "Trusts"  mean,  collectively,  each Trust as defined in each of
the Trust Agreements.

                "Unfunded  Commitment"  means,  with respect to any  Transferred
Interest,  any  unfunded  obligations  of Assignor or the Owner  Trustee to make
loans,  advances  or  extensions  of credit  or to defer or extend  the time for
payment of rent  obligations  for the purpose of funding or otherwise  financing
modifications to the Aircraft to which such Transferred  Interest relates or the
acquisition of equipment.

                "without  special  inquiry"  means with respect to Assignor,  no
inquiry other than that conducted in the ordinary  course of  administering  the
transactions  contemplated by the Operative Agreements and that conducted in the
ordinary course of negotiating the transactions  contemplated by this Agreement,
by any director, officer, employee or agent of Assignor who is actively involved
in negotiating the transactions contemplated by this Agreement.

                As used herein, each of "Assignor," "Assignee," "Lessee," "Owner
Trustee" or any other Person  includes,  without  prejudice to the provisions of
any  Operative  Agreements,  any  successor in interest to it and any  permitted
transferee, permitted purchaser or permitted assignee of it.


                                       10



<PAGE>




SECTION 2.      Sale and Assignment

                Subject to the terms and  conditions  of this  Agreement  and in
reliance on the  representations and warranties of Assignee set forth herein, at
each applicable  Effective Time,  Assignor does hereby sell, assign and transfer
to Assignee all of Assignor's  present and future right,  title and interest in,
to and under each Transferred Interest including, without limitation, all of the
Assumed Liabilities  relating to such Transferred  Interest;  provided that such
sale,  assignment and transfer shall be effective only upon the  satisfaction or
waiver,  at or prior to the applicable  Effective Time for each such Transferred
Interest,  of the conditions set forth in Section 7, such satisfaction or waiver
to be evidenced by Assignor's  acceptance  from Assignee of the  Assignment  and
Assumption Agreement for each such Transferred Interest.

SECTION 3.      Purchase and Assumption

                Subject to the terms and  conditions  of this  Agreement  and in
reliance on the  representations and warranties of Assignor set forth herein, at
each  applicable  Effective  Time,  Assignee does hereby (i) purchase and accept
each Transferred  Interest,  (ii) assume all of the Assumed Liabilities relating
to each such  Transferred  Interest and (iii)  confirm that it shall be deemed a
party to each  Trust  Agreement  as of the  Effective  Time  relating,  and with
respect,  to the Transferred  Interest  referenced in such Trust Agreement,  and
agrees to be bound by all the terms of each  thereof and hereby  undertakes  and
assumes all of the Assumed  Liabilities  relating to such Transferred  Interest;
provided,  however,  that Assignor  shall remain liable for the  obligations  of
Assignor  relating to Reserved Rights;  provided,  further,  that such purchase,
acceptance  and  assumption  shall be effective  only upon the  satisfaction  or
waiver,  at or  prior to the  applicable  Effective  Time  for such  Transferred
Interest,  of the conditions set forth in Section 8, such satisfaction or waiver
to be  evidenced  by  Assignee's  delivery  to Assignor  of the  Assignment  and
Assumption Agreement for such Transferred Interest. The assumption  contemplated
hereby,  at the  applicable  Effective  Time, as between  Assignor and Assignee,
shall be deemed to release  Assignor  from all Assumed  Liabilities  relating to
such Transferred Interest.

SECTION 4.      Purchase Price

                (a)   Payment of Purchase Price

                      The purchase price for the Transferred Interests is as set
forth on Schedule 4(a)  attached  hereto plus the Purchase  Price  Interest (the
"Purchase  Price").  The Purchase Price Interest shall be due and payable on the
Business Day after the earlier to occur of (i) the last  Effective Time to occur
hereunder  and (ii) the seventh  Business  Day after the Start Date and shall be
paid by Assignee to Assignor by wire transfer of immediately  available funds in
accordance with the instructions of Assignor. At or prior to the first Effective
Time to occur pursuant to the terms hereof, Assignee shall (i) deliver a note to
Assignor in substantially the form attached hereto as Exhibit A (the "Promissory
Note"), in an amount equal to the amount set forth on Schedule 4(a) as the "Note
Amount" and (ii) wire transfer immediately available funds in an amount equal to
the amount set forth on Schedule  4(a) as the "Cash  Amount" to the Escrow Agent
for deposit into the account  established  pursuant to the Escrow Agreement (the
"Cash Account").



                                       11



<PAGE>



                (b)   Transfer of Aircraft Income and Lessee Deposits

                      For each Daylight Effective Time and on the Mop-Up Date,
contemporaneously  with such Daylight  Effective Time or on the Mop-Up Date, and
for each Effective Time that does not constitute a Daylight Effective Time or is
not deemed to occur on the Mop-Up  Date,  promptly at the  beginning of the next
Business Day after such Effective Time, Assignor shall wire transfer immediately
available funds to Assignee, at an account designated in writing by Assignee, in
an amount equal to the Aircraft Income and Lessee Deposits estimated by Assignor
pursuant  to  Section  4(d)(i)  hereof  to  constitute  part of the  Transferred
Interest  transferred (or deemed to be transferred) as of such Effective Time or
as of the Mop-Up Date.

                (c)   First Effective Date; Mop-Up Date

                      Each of Assignor  and Assignee  covenants  and agrees that
(i) if each of the conditions precedent in Section 7 (as to Assignor) or Section
8 (as to Assignee) are satisfied or waived by the appropriate  party,  the first
Effective Time will occur on the Start Date and (ii) the Effective Time for each
and every  Transferred  Interest will occur not later than the close of business
in New York on the Mop-Up Date.  Each of Assignor and  Assignee  further  agrees
that at any time after the  earlier of (i) the  seventh  Business  Day after the
Start  Date and (ii) the last  Effective  Time to occur  pursuant  to the  terms
hereof, (A) Assignor is hereby authorized to withdraw from the Cash Account,  an
amount equal to the Cash Amount less any  reduction of the Cash Amount  pursuant
to the last  sentence of this Section 4(c) or pursuant to Section  4(d)(ii) less
one-half  of the fees  owed to the  Escrow  Agent  and (B)  Assignee  is  hereby
authorized  to withdraw  from the Cash  Account all other funds in excess of the
amount set forth in clause (A);  provided,  however,  if Assignee  withdraws the
Cash  Amount  pursuant  to the  foregoing  clause (i) and there is a  subsequent
reduction in the Cash Amount pursuant to the last sentence of this Section 4(c),
then  Assignor  shall  promptly  return  to  Assignee  an  amount  equal to such
subsequent  reduction  plus  interest  at the  rate of 5.3% per  annum  from the
withdrawal  date through the date of repayment to Assignee.  On the Mop-Up Date,
so long as (i) the  conditions  precedent  set forth in Section 7 hereof  (other
than with respect to the location of the Aircraft)  shall have been satisfied or
waived by Assignor, Assignor shall be obligated to deliver, with respect to each
Transferred   Interest  that  has  not  been  assigned  previously  to  Assignee
(including any Transferred  Interest which has not been  transferred  previously
because the Aircraft relating to such Transferred  Interest has been the subject
of a Loss of  Title  but as to  which  such  Loss of  Title  has  been  cured or
otherwise  corrected on or prior to the Mop-Up Date),  Assignment and Assumption
Agreements,  the evidence of authorization  described in Section  8(e)(iv),  any
consents referred to in Section 5.1(b),  the opinions  described in Section 8(i)
and any  other  instruments  or  documents  as  Assignee  or its  counsel  shall



                                       12



<PAGE>



reasonably  request  and (ii) the  conditions  precedent  set forth in Section 8
hereof (other than with respect to the location of the Aircraft) shall have been
satisfied or waived by Assignee,  Assignee  shall be obligated to deliver,  with
respect to each  Transferred  Interest that has not been assigned  previously to
Assignee  (including any  Transferred  Interest  which has not been  transferred
previously  because the Aircraft relating to such Transferred  Interest has been
the subject of a Loss of Title but as to which such Loss of Title has been cured
or  otherwise  corrected  on or  prior  to  the  Mop-Up  Date),  Assignment  and
Assumption  Agreements,  the  evidence  of  authorization  described  in Section
7(j)(v),  any consents referred to in Section 6.1(b),  the opinions described in
Section 7(n) and any other  instruments  or documents as Assignor or its counsel
shall reasonably request. If on the Mop-Up Date any of the conditions  precedent
set forth in  Section 7 or  Section 8 hereof  (other  than with  respect  to the
location of the Aircraft) are not  satisfied or waived by the  applicable  party
with respect to any Transferred Interest,  any Aircraft which is subject of such
Transferred  Interest  will no longer be the subject of this  Agreement and this
Agreement  will be  deemed  to be  reformed  to delete  all  references  to such
Aircraft and such Transferred Interest and the Purchase Price will be reduced in
an amount equal to the Allocable  Portion  Percentage for such Aircraft and each
of the Note Amount and the Cash Amount as set forth on Schedule 4(a) hereof will
be adjusted on a pro rata basis.

                (d)   Settlement of Aircraft Income and Lessee Deposits

                      (i)  Prior to  assignment  of a  Transferred  Interest  to
Assignee here under,  Assignor shall estimate the Aircraft Income and any Lessee
Deposits that have been  received by Assignor or the Owner  Trustee  relating to
such  Transferred  Interest  as  of  the  applicable  Effective  Time  for  such
Transferred  Interest.  Because the actual amount of the Aircraft Income and any
Lessee Deposits  relating to a Transferred  Interest and received by Assignor or
such Owner Trustee will not be readily  determinable  until after the applicable
Effective  Time,  a final  calculation  cannot be made on that date.  Therefore,
within  fifteen  (15)  Business  Days  after the end of the month in which  such
Effective  Time  occurs,   Assignor  shall  provide  Assignee  with  such  final
calculation  (in reasonable  detail) of Aircraft  Income and any Lessee Deposits
that have been  received  by  Assignor  or the Owner  Trustee  relating  to such
Transferred  Interest.  To the extent the calculation indicates that the amounts
transferred  by Assignor  pursuant to Section  4(b) hereof with  respect to such
Transferred Interest were in excess of the actual Aircraft Income and any Lessee
Deposits  received by Assignor or the Owner Trustee relating to such Transferred
Interest,  Assignee  shall  promptly  pay the amount of such  excess to Assignor
(plus  interest on such amount at the rate of 5.3% per annum from the applicable
date of payment to Assignee to the date of repayment to Assignor). To the extent
the calculation  indicates that the amounts  transferred by Assignor pursuant to
Section 4(b) hereof with respect to such Transferred Interest were less than the
actual Aircraft Income and any Lessee Deposits received by Assignor or the Owner
Trustee relating to such  Transferred Interest, Assignor  shall promptly pay the



                                       13



<PAGE>



amount of such  deficiency to Assignee (plus interest on such amount at the rate
of 5.3% per annum from the Business Day following the applicable  Effective Time
to the date of payment to Assignee).  An  adjustment  to the Purchase  Price for
Aircraft  Income under this Section 4(d)(i) shall be treated by the parties as a
purchase price adjustment for all income tax purposes.

                      (ii) If at any time  prior to the last  Effective  Time to
occur  pursuant  to the  terms  hereof,  any  Aircraft  which  is  subject  of a
Transferred Interest not yet transferred by Assignor to Assignee suffers a Total
Loss,  such  Aircraft  will no longer be the subject of this  Agreement and this
Agreement  will be  deemed  to be  reformed  to delete  all  references  to such
Aircraft and the related Transferred  Interests;  provided,  however,  that with
respect to any such  Aircraft,  if such Total Loss is due to a Loss of Title and
if Assignor  cures or  otherwise  corrects  such Loss of Title by  regaining  or
recovering the use thereof or title thereto on or prior to the Mop-Up Date, such
Aircraft will be deemed to be reinstated and once more subject to this Agreement
and this  Agreement  will be deemed to be  reformed  to include  all  previously
deleted  references  to such  Aircraft  and the related  Transferred  Interests.
Contemporaneously  with the  removal  of any  Aircraft  from  the  terms of this
Agreement,  the  Purchase  Price  will be  reduced  in an  amount  equal  to the
Allocable  Portion  Percentage for such Aircraft and each of the Note Amount and
the Cash Amount as set forth on  Schedule  4(a) hereof will be adjusted on a pro
rata basis.  Contemporaneously  with the  reinstatement of an Aircraft into this
Agreement,  the  Purchase  Price  will be  increased  in an amount  equal to the
Allocable  Portion  Percentage for such Aircraft and each of the Note Amount and
the Cash Amount as set forth on  Schedule  4(a) hereof will be adjusted on a pro
rata basis. If at any time prior to the last Effective Time to occur pursuant to
the terms hereof,  any Aircraft  which is subject of a Transferred  Interest not
yet transferred by Assignor to Assignee  suffers any property damage or loss not
constituting  a Total  Loss and such  property  damage  or loss is not  cured or
corrected  prior to the time when such  Transferred  Interest is transferred (or
deemed  to be  transferred)  by  Assignor  to  Assignee,  Assignor  shall pay to
Assignee  any  insurance  proceeds  received  by Assignor  with  respect to such
property  damage or loss promptly  after  receipt by Assignor of such  insurance
proceeds;  provided,  however, that Assignor shall not enter into any settlement
of any  insurance  claim without the prior  written  consent of Assignee,  which
consent may not be unreasonably withheld.



                                       14



<PAGE>



SECTION 5.      Representations and Warranties of Assignor; Limitation of
                Warranty; Covenant with Respect to Pre-Closing Actions

                5.1 Representations  and Warranties of Assignor.  As of the date
hereof and as of each  Effective Time with respect to the  Transferred  Interest
being  transferred  at  such  Effective  Time,   Assignor  makes  the  following
representations and warranties to Assignee:

                (a)   Partnership Organization, Etc.

                      Assignor  (i) is a  limited  partnership  duly  organized,
validly existing and in good standing under the laws of the State of California,
(ii) is a Citizen of the United States and (iii) has the  requisite  partnership
power and authority to carry on its business as presently  conducted,  to own or
hold under lease its  properties,  and to enter into and perform its obligations
under  this  Agreement  and each of the  Ancillary  Agreements  to which it is a
party.

                (b)   Due Authorization; Non-Contravention

                      The execution  and delivery by Assignor of this  Agreement
and each of the Ancillary Agreements to which it is a party, and the performance
by Assignor of its  obligations  hereunder  and  thereunder,  (i) have been duly
authorized by all necessary partnership action on the part of Assignor,  (ii) do
not require any partnership  approval,  or approval or consent of any trustee or
holder of any  indebtedness  or  obligations  of Assignor not already  obtained,
(iii) do not  contravene any law,  governmental  rule,  regulation,  judgment or
order applicable to or binding on Assignor, or the limited partnership agreement
of Assignor or contravene  the  provisions  of, or constitute a default under or
result in the  creation of any Lien (other  than as  provided  for or  otherwise
permitted  in the  Operative  Agreements)  upon the  Trust  Estate  or any other
Transferred Interest under any indenture,  mortgage, bank credit agreement, note
or bond  purchase  agreement,  long-term  lease,  license or other  agreement or
instrument to which  Assignor is a party or by which  Assignor is bound and (iv)
except as set forth on Schedule 5(b) attached hereto, do not require the consent
or approval of, the giving of notice to, the registration with, or the taking of
any other  action in respect  of,  any  federal,  state or foreign  governmental
authority or agency or any other Person, except those already obtained.



                                       15



<PAGE>




                (c)   Due Execution and Delivery; Enforceability

                      This  Agreement  and each of the  Ancillary  Agreements to
which it is a party have been duly executed and  delivered  and are  enforceable
against  Assignor  in  accordance  with  their  terms,  subject to the effect of
bankruptcy,  insolvency,  reorganization,  receivership,  moratorium  and  other
similar laws affecting the rights and remedies of creditors  generally and, with
respect to the enforceability of this Agreement or any such Ancillary Agreement,
by  general   principles   of  equity,   including   principles   of  commercial
reasonableness,  good faith and fair dealing  (regardless of whether enforcement
is sought in a proceeding at law or in equity).

                (d)   Event of Default

                      Except as set forth on Schedule  5(d), no claims have been
made by or at the direction of Assignor that remain  unresolved under any of the
Operative Agreements, and to the actual  knowledge of Assignor,  without special
inquiry,  no basis for such claims  exists  (excluding  in all cases  claims for
reimbursement  of fees,  costs and  expenses  which  are  either  immaterial  or
incurred in the ordinary  course).  Except as set forth on Schedule 5(d), to the
actual  knowledge of Assignor,  without special  inquiry,  (i) no disputes exist
among any of the parties to the Operative  Agreements  concerning  the rights or
obligations of such parties thereunder, (ii) there exists no default or event of
default under any Leases,  any Trust Agreement or any other Operative  Agreement
attributable  to any act or  omission  of  Assignor,  (iii)  Assignor  is not in
default  under  any of the  Operative  Agreements,  (iv) no  default  under  any
Operative  Agreement  has occurred and is  continuing  as a result of any action
taken by the  Owner  Trustee  in  accordance  with any  express  instruction  by
Assignor and (v) there has been no assertion by any Lessee of any default on the
part of Assignor or the Owner Trustee under any Operative Agreement.

                (e)   Total Loss

                      To the  actual  knowledge  of  Assignor,  without  special
inquiry, none of the Aircraft are the subject of any Total Loss.

                (f)   Taxes

                      (i) All tax returns and reports required to be filed by or
on behalf of each Owner Trustee (solely in its capacity as Owner Trustee and not
in its individual  capacity),  and all federal income tax returns required to be
filed by or on behalf of  Assignor  on or before  the  Effective  Time have been
timely filed with the appropriate  taxing  authorities in all  jurisdictions  in
which such tax returns were required to be filed and all taxes shown due on such
tax returns have been paid in full; and

                      (ii) No claims  have been made by or on behalf of Assignor
or any other Person in respect of any obligation under the Operative  Agreements
to indemnify  any Owner  Trustee or Assignor  for or with respect to Taxes,  and
Assignor has no present  intention of making any such claim (other than possible
claims  for state,  local and foreign  Taxes or foreign tax credits arising from


                                       16



<PAGE>



the use or operation of the Aircraft by the  applicable  Lessee or any sublessee
prior to the applicable Effective Time).

                (g)   Litigation

                      Except as set forth on Schedule 5(g) hereof,  there are no
legal or governmental  actions,  suits or proceedings  pending or, to the actual
knowledge  of  Assignor,   threatened   against   Assignor   before  any  court,
administrative  agency or tribunal which,  if determined  adversely to Assignor,
would  materially  adversely  affect the  ability  of  Assignor  to perform  its
obligations under this Agreement or any of the Ancillary  Agreements to which it
is a party.

                (h)   Encumbrances

                      Except as set forth on Schedule  5(h) hereof,  Assignor is
the sole legal and  beneficial  owner of (i) each of the  Transferred  Interests
(other than the Foreign  Aircraft),  free and clear of all Liens and,  except as
set forth on Schedule 5(b),  transfer  restrictions and (ii) each of the Foreign
Aircraft, free and clear of all Liens and, except as set forth on Schedule 5(b),
transfer  restrictions  other than (A) Liens that are  permitted by the terms of
the leases  relating to such  Foreign  Aircraft and (B) the rights of the Lessee
with  respect to such  Foreign  Aircraft.  Except as set forth on Schedule  5(h)
hereof,  each Owner  Trustee is the sole  legal  owner of each Trust  Estate for
which such Owner  Trustee is owner  trustee  pursuant  to the  applicable  Trust
Agreement,  free and clear of all  Liens  and,  except as set forth on  Schedule
5(b),  transfer   restrictions  other  than  Liens  permitted  by  and  transfer
restrictions  contained  in the  Operative  Agreements  relating  to such  Trust
Estate. Except as otherwise provided in the Operative  Agreements,  Assignor has
not previously sold, assigned,  encumbered,  transferred or conveyed,  and other
than as provided in this Agreement, has no obligation to sell, assign, encumber,
transfer  or convey,  any of its right,  title or  interest  in, to or under the
Transferred Interests to any Person.

                (i)   Brokers' Fees

                      Assignor  is not  liable  for the  fees of any  broker  or
Person  acting  on  Assignor's   behalf  in  connection  with  the  transactions
contemplated  hereby  or by any of the  Ancillary  Agreements  to  which it is a
party.



                                       17



<PAGE>



                (j)   Operative Agreements

                      Except  as  set  forth  on  Schedule  5(j),  Assignor  has
provided Assignee with true and complete originals of each of the Leases and the
Trust  Agreements  and  with  true  and  complete  copies  of each of the  other
Operative  Agreements and all amendments and supplements thereto as set forth on
Schedules  2,  4 and  6  hereto,  which  represent,  collectively,  all  of  the
agreements,  instruments  and  documents  among  Assignor and the parties to the
Operative  Agreements  with respect to the  Transferred  Interests  and no other
agreements,  instruments  or  documents,  among  Assignor and the parties to the
Operative Agreements, with respect to the Transferred Interests exist.

                (k)   Title to Transferred Interests

                      Upon  execution  and  delivery  to Assignee of each of the
Assignment and Assumption  Agreements and the  consummation of the  transactions
contemplated hereunder and thereunder,  Assignee will acquire legal title to the
Transferred  Interests,  free and clear of all Liens and  transfer  restrictions
other than as set forth on Schedule 5(h).

                (l)  Unfunded Commitments

                      Except as set  forth on  Schedule  7 hereof,  there are no
Unfunded Commitments in respect of any Aircraft.

                5.2 Supplements to Schedules; Post-Signing Information. Assignor
may  supplement or amend  Schedules  5(d),  5(g) and 5(h) to this Agreement with
respect to any matter,  condition or  occurrence  hereafter  arising  which,  if
existing or occurring at the date of this Agreement, would have been required to
be set  forth or  described  in such  Schedules  or would  otherwise  have  been
inconsistent with its representations herein.

                5.3  Limitation  of  Warranty.  Assignor's  representations  and
warranties are limited as set forth below:

                (a)   THE AIRCRAFT, EACH ENGINE AND EACH PART THAT
                      CONSTITUTE A PORTION OF ANY TRANSFERRED
                      INTEREST IS BEING TRANSFERRED AND DELIVERED TO
                      ASSIGNEE "AS IS" AND "WHERE IS," AND EXCEPT AS
                      EXPRESSLY SET FORTH IN SECTION 5.1 HEREOF,
                      WITHOUT ANY REPRESENTATION, GUARANTEE OR
                      WARRANTY OF ASSIGNOR, EXPRESS OR IMPLIED, OF
                      ANY KIND, ARISING BY LAW OR OTHERWISE; AND



                                       18



<PAGE>



                (b)   WITHOUT LIMITING THE GENERALITY OF THE FORE
                      GOING, ASSIGNOR SPECIFICALLY DISCLAIMS, AND
                      EXCLUDES HEREFROM (i) ANY EXPRESS OR IMPLIED
                      WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
                      PARTICULAR PURPOSE, (ii) ANY IMPLIED WARRANTY OF
                      FREEDOM FROM ANY RIGHTFUL CLAIM BY WAY OF
                      INFRINGEMENT OF PATENT, COPYRIGHT, TRADEMARK,
                      DESIGN OR OTHER PROPRIETARY RIGHT, (iii) ANY
                      IMPLIED WARRANTY ARISING FROM COURSE OF
                      PERFORMANCE, COURSE OF DEALING OR USAGE OF
                      TRADE, AND (iv) EXCEPT AS EXPRESSLY SET FORTH IN
                      SECTION 13(c) HEREOF, ANY OBLIGATION OR LIABILITY
                      OF ASSIGNOR ARISING IN TORT, WHETHER OR NOT
                      ARISING FROM THE NEGLIGENCE OF ASSIGNOR,
                      ACTUAL OR IMPLIED, OR IN STRICT LIABILITY,
                      INCLUDING ANY OBLIGATION OR LIABILITY FOR LOSS
                      OF USE, REVENUE OR PROFIT WITH RESPECT TO THE
                      AIRCRAFT OR ENGINE OR PART OR FOR ANY LIABILITY
                      OF ASSIGNOR TO ANY THIRD PARTY OR ANY OTHER
                      DIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL
                      DAMAGES WHATSOEVER.

        5.4 Actions with Respect to  Transferred  Interests.  From the date this
Agreement  is executed  and  delivered by Assignor to Assignee to the earlier to
occur of (i) the termination of this Agreement  pursuant to Section 15 hereof or
(ii) the  Effective  Time with  respect  to a  Transferred  Interest,  except as
otherwise expressly required or permitted by this Agreement,  Assignor shall not
and shall not direct the Owner Trustee to, without the prior written  consent of
Assignee:

                (a) enter into or materially  modify any agreement,  contract or
commitment  which, if entered into,  created or established prior to the date of
this Agreement, would be required to be listed (or, in the case of modifications
and amendments,  pertains to an agreement,  contract,  commitment or arrangement
which is presently  listed) on Schedule 2, 4, 7 or 8 of this  Agreement or waive
any default or event of default under any Operative Agreement; or

                (b)   mortgage,   pledge  or  otherwise   encumber  any  of  the
Transferred Interests or any Aircraft which is part of a Trust Estate; or

                (c) sell,  lease,  transfer or  otherwise  dispose of any of the
Transferred Interests or any Aircraft which is a part of a Trust Estate; or



                                       19



<PAGE>



                (d) enter  into an  agreement  or  arrangement  to do any of the
above.


SECTION 6.      Representations and Warranties of Assignee; Access Covenant

                6.1 Representations  and Warranties of Assignee.  As of the date
hereof and as of each  Effective Time with respect to the  Transferred  Interest
being  transferred  at  such  Effective  Time,   Assignee  makes  the  following
representations and warranties to Assignor:

                (a)   LLC Organization, Etc.

                      Assignee   (i)  is  a  limited   liability   company  duly
organized,  validly existing and in good standing under the laws of the State of
California,  and (ii) has the  requisite  power  and  authority  to carry on its
business as presently  conducted and as proposed to be conducted  after the date
of this Agreement, to own or hold under lease its properties,  and to enter into
and  perform  its  obligations  under  this  Agreement,  each  of the  Ancillary
Agreements to which it is a party,  each of the Trust Agreements and each of the
other Operative Agreements.

                (b)   Due Authorization; Non-Contravention

                      The execution  and delivery by Assignee of this  Agreement
and each of the Ancillary Agreements to which it is a party, and the performance
by  Assignee  of its  obligations  hereunder,  thereunder  and  under  the Trust
Agreements and the other  Operative  Agreements (i) have been duly authorized by
all  necessary  action on the part of  Assignee,  (ii) do not require any member
approval or any approval or consent of any trustee or holder of any indebtedness
or  obligations  of  Assignee  except  those  already  obtained,  (iii)  do  not
contravene  any  provision  of the  Act or any  other  law,  governmental  rule,
regulation,  judgment  or order  applicable  to or binding on  Assignee,  or the
organizational  documents  of  Assignee  or  contravene  the  provisions  of, or
constitute a default under, or result in the creation of any Lien (other than as
provided for or otherwise permitted in the Operative  Agreements) upon the Trust
Estate  under any  indenture,  mortgage,  bank  credit  agreement,  note or bond
purchase agreement, long-term lease, license or other agreement or instrument to
which  Assignee is a party or by which  Assignee is bound and (iv) except as set
forth on Schedule 6(b) attached  hereto,  do not require the consent or approval
of, the giving of notice to, the  registration  with, or the taking of any other
action in respect of, any federal,  state or foreign  governmental  authority or
agency or any other Person, except those already obtained.



                                       20



<PAGE>



                (c)   Due Execution and Delivery; Enforceability

                      This  Agreement  and each of the  Ancillary  Agreements to
which it is a party have been duly executed and  delivered  and are  enforceable
against  Assignee  in  accordance  with  their  terms,  subject to the effect of
bankruptcy,  insolvency,  reorganization,  receivership,  moratorium  and  other
similar laws affecting the rights and remedies of creditors  generally and, with
respect to the enforceability of this Agreement or any such Ancillary Agreement,
by  general   principles   of  equity,   including   principles   of  commercial
reasonableness,  good faith and fair dealing  (regardless of whether enforcement
is sought in a proceeding at law or in equity).

                (d)   Litigation

                      There  are no  legal  or  governmental  actions,  suits or
proceedings pending or, to the actual knowledge of Assignee,  threatened against
Assignee  before  any  court,   administrative  agency  or  tribunal  which,  if
determined adversely to Assignee,  would materially adversely affect the ability
of  Assignee  to  perform  its  obligations  under  this  Agreement,  any of the
Ancillary Agreements, the Trust Agreements or the other Operative Agreements.

                (e)   Compliance with Operative Agreements

                      Prior to the Effective  Time for a  Transferred  Interest,
Assignee  will  have  complied  with  and  satisfied  all  of  the   conditions,
requirements and other  obligations  imposed on Assignee pursuant to each of the
Leases,  Trust  Agreements and other  Operative  Agreements  which have not been
waived  by the party  entitled  to  require  compliance  with  such  conditions,
requirements  or  other  obligations  in order to  effect  a  permitted  binding
transfer of the Transferred Interests to Assignee.

                (f)   Non-Airline

                      Assignee  is not a  commercial  air  carrier or  Affiliate
thereof that is in direct competition with any Lessee.

                (g)   Brokers' Fees

                      Assignee  is not  liable  for the  fees of any  broker  or
Person  acting  as  a  broker  on  Assignee's  behalf  in  connection  with  the
transactions contemplated hereby.



                                       21



<PAGE>



                (h)   Acquisition For Own Account

                      The  Transferred  Interests are being acquired by Assignee
for  its own  account,  for  investment  and not  with a view to any  resale  or
distribution  thereof.  Assignee  acknowledges that it has received,  or has had
access to, all information  which it considers  necessary or advisable to enable
it to make a decision  concerning  the  transfer  of the  Transferred  Interests
including,  without  limitation,  access to the Leases, the Trust Agreements and
the other Operative Agreements and an opportunity to inspect the Aircraft.

                6.2 Access Covenant.  Assignee agrees that it shall use its best
efforts  to  retain  the  Operative  Agreements  with  respect  to  each  of the
Transferred  Interests  transferred  to it  hereunder in  perpetuity;  provided,
however,  that  Assignee  shall  have the right to (a)  transfer  any  Operative
Agreements  relating to a  Transferred  Interest or Aircraft to the purchaser of
such  Transferred  Interest  or  Aircraft,  as the case may be,  subject to such
purchaser's agreement to retain such Operative Agreements and to permit Assignor
and its agents and representatives  access to such Operative  Agreements for the
remaining  term of the  Promissory  Note and (b)  dispose of or destroy any such
Operative Agreements at any time which is after payment in full and discharge of
the Promissory  Note.  Assignee will allow or will cause Assignor and its agents
and  representatives to be allowed access,  during regular business hours at the
offices of  Assignee,  to all of the  Operative  Agreements  and to any  Persons
having possession of or information relating to the Operative Agreements.


SECTION 7.      Conditions Precedent to the Obligations of Assignor

                The  obligation  of Assignor to sell and assign any  Transferred
Interest to Assignee is subject to the satisfaction of the following  conditions
with respect to such Transferred Interest:

                (a)   Purchase Price

                      Assignee  shall have paid the Purchase Price in the manner
specified in Section 4.

                (b)   Affidavit of Limited Control by a Non-U.S. Citizen

                      Not later  than the first  Effective  Time,  an  affidavit
shall have been duly  authorized,  executed,  notarized  and  delivered by Owner
Trustee to FAA Counsel in form  suitable for filing with the FAA pursuant to the
Act certifying that (i) contemporaneously  with the Effective Time  with respect



                                       22



<PAGE>



to each  Transferred  Interest,  the Trust  Agreement with respect thereto shall
have been  amended  to include  limitations  on the  voting  rights of  Assignee
thereunder and (ii) Owner Trustee is a Citizen of the United States  pursuant to
the Act.

                (c)   Escrow Agreement

                      Assignor   shall  have  received  a  copy  of  the  Escrow
Agreement,  dated as of a date not later than the first  Effective Time to occur
under this  Agreement  which shall have been executed and delivered by Assignee,
Assignor and the Escrow Agent.

                (d)   TASL "Keep Well" Agreement

                      Assignor  shall  have  received  a copy of the  Keep  Well
Agreement,  dated as of a date not later than the first  Effective Time to occur
under this  Agreement  which shall have been  executed and delivered by Assignee
and TASL,  in  substantially  the form  attached  hereto as Exhibit B (the "Keep
Well").

                (e)   TIL Keep Well Guaranty and Loan Guaranty

                      Assignor  shall have received an original  counterpart  of
the Keep Well Guaranty and the Loan Guaranty,  each dated as of a date not later
than the first Effective Time to occur under this Agreement, each of which shall
have been  executed and  delivered by TIL, in  substantially  the form  attached
hereto as Exhibit C-1 (the "Keep Well  Guaranty") or C-2 (the "Loan  Guaranty"),
as applicable.

                (f)   Assignee Security Agreement

                      Assignor  shall have received an original  counterpart  of
the Pledge and Security  Agreement,  dated as of a date not later than the first
Effective Time,  which shall have been executed and delivered by Assignee,  TASL
and each member of Assignee in substantially the form attached hereto as Exhibit
D (the  "Security  Agreement")  together  with  evidence  that all other actions
necessary  or, in the opinion of Assignor,  desirable to perfect and protect the
security  interests and liens created by the Security  Agreement have been taken
including,  without  limitation,  the  filing of  financing  statements  against
Assignee, TASL and each member of Assignee.

                (g)   Approvals and Consents

                      All approvals, consents and other items listed on Schedule
5(b) shall have been  obtained,  satisfactory  to Assignor in all  respects,  as
determined  by Assignor  in its sole discretion and any authorizations which may



                                       23



<PAGE>



be  required  for  the  valid  consummation  by  Assignor  and  Assignee  of the
transactions   contemplated  by  this  Agreement  under  the   Hart-Scott-Rodino
Antitrust  Improvements  Act of 1976,  as  amended,  shall  have  been  obtained
(including,  but not limited to, the expiration of any applicable waiting period
thereunder).

                (h)   Due Authorization, Execution and Delivery

                      This  Agreement,  the Assignment and Assumption  Agreement
and any other  Ancillary  Agreements with respect to such  Transferred  Interest
shall have been duly authorized, executed and delivered by Assignee.

                (i)   Representations and Warranties

                      The  representations  and warranties of Assignee contained
herein shall be true and correct in all material  respects as of the  applicable
Effective Time with the same force and effect as though such representations and
warranties had been made on and as of such Effective Time.

                (j)   Organizational and Authorization Matters

                      Assignor shall have received:

                             (i)  Resolutions of the boards of directors of each
of TASL,  TIL, each member of Assignee  that is not a natural  person and of the
manager  of  Assignee,  certified  by  the  respective  Secretary  or  Assistant
Secretary thereof,  as of the date of this Agreement,  to be duly adopted and in
full force and effect on such date,  authorizing (a) the consummation of each of
the  transactions  contemplated  by this  Agreement  and  each of the  Ancillary
Agreements  and (b)  specific  officers  or  representatives  of  TASL,  TIL and
Assignee to execute and deliver this  Agreement and the Ancillary  Agreements to
which any of them is a party.

                             (ii)  Governmental  certificates,  dated  the  most
recent  practicable  date  prior to the  date of this  Agreement  with  telegram
updates  where  available,  showing  that each of Assignee,  TASL,  TIL and each
member  of  Assignee  that is not a  natural  person  is  organized  and in good
standing in the  jurisdiction  of its  organization  and that each of  Assignee,
TASL,  TIL and each member of Assignee that is not a natural person is qualified
as  a  foreign  corporation,   partnership  or  limited  liability  company,  as
applicable,  and in good  standing in each  jurisdiction  where the ownership or
operation  of  its   properties  or  conduct  of  its  business   requires  such
qualification.



                                       24



<PAGE>



                             (iii) A copy of (a) the  certificate  of  formation
and all amendments thereto of Assignee and the articles of incorporation and all
amendments  thereto of each of TASL, TIL and each member of Assignee that is not
a natural  person,  each certified as of a recent date by the Secretary of State
of the jurisdiction of its organization, (b) the bylaws of each of TASL, TIL and
each member of Assignee that is not a natural person  certified by the Secretary
or  Assistant  Secretary  thereof  as true  and  correct  as of the date of this
Agreement  and (c) the  operating  agreement of Assignee  (which  shall  include
provisions that are  substantially in the form attached hereto as Exhibit E) and
the articles of  incorporation  and all amendments  thereto of each of TASL, TIL
and each  member of  Assignee  that is not a natural  person,  certified  by its
manager as true and correct on the date of this  Agreement  (with tax allocation
and cash distribution provisions deleted).

                             (iv)  Certificates of the Secretary or an Assistant
Secretary of each of TASL, TIL and each member of Assignee that is not a natural
person and of the manager of Assignee,  as to the  incumbency  and signatures of
the  representatives  thereof  executing  this Agreement or any of the Ancillary
Agreements  to  which  any of them is a party,  together  with  evidence  of the
incumbency of such Secretary or Assistant Secretary.

                             (v) As of each Effective Time, a certificate of the
Secretary,  an Assistant  Secretary  or an Attesting  Secretary of each of TASL,
TIL,  each  member of Assignee  that is not a natural  person and the manager of
Assignee  certifying that the certificates  delivered in accordance with clauses
(i), (ii), (iii) and (iv) above are true and correct as of such Effective Time.

                (k)   Illegality; No Proceedings

                      At the applicable  Effective  Time, the performance of the
transactions  contemplated  hereby,  upon  the  terms and  conditions  set forth
herein,  shall not, in the reasonable judgment of Assignor,  violate,  and shall
not  subject  Assignor  to any  penalty or  liability  under,  any law,  rule or
regulation binding upon Assignor.  At the applicable Effective Time, no legal or
governmental action, suit or proceeding shall have been instituted or threatened
before  any  court,  administrative  agency or  tribunal,  nor shall any  order,
judgment  or decree  have been  issued or  proposed  to be issued by any  court,
administrative agency or tribunal to set aside, restrain,  enjoin or prevent the
consummation of this Agreement or the transactions contemplated hereby.

                (l)   No Total Loss

                      At the applicable  Effective Time, there shall not exist a
Total Loss with respect to the Aircraft related to such Transferred Interest.



                                       25



<PAGE>



                (m)   Opinions

                      Assignor   shall  have  received  an  opinion   reasonably
satisfactory  to Assignor,  dated as of the first  Effective Time from Manwell &
Milton, counsel to Assignee,  each member of Assignee, TASL and TIL with respect
to such  matters  and to such  effect  as  Assignor  shall  reasonably  request.
Assignor shall also have received, with respect to each Transferred Interest, at
the applicable Effective Time for such Transferred Interest, an opinion from (i)
Manwell & Milton,  counsel to  Assignee  and (ii) Crowe & Dunlevy,  special  FAA
counsel  ("Special FAA Counsel") or Theodore Goddard  ("Special CAA Counsel") or
in each case with respect to such matters relating to such Transferred  Interest
and to such effect as Assignor shall reasonably request.

                (n)   Location of Aircraft

                      Subject  to  Section  4(c)  hereof,  the  location  of the
Aircraft  relating to each Transferred  Interest shall be acceptable to Assignor
at the applicable Effective Time for such Transferred Interest.

                (o)   TIL Balance Sheets

                      Assignor  shall have received an audited  balance sheet of
TIL as of December 31, 1996 reflecting a consolidated net worth, net of minority
interests, of at least $150,000,000.

                (p)   Other Instruments and Documents; Additional Information

                      Assignor  shall have received such other  instruments  and
documents as Assignor or its counsel shall  reasonably  request.  Assignor shall
have  received  such other  documents  and evidence  with respect to Assignee as
Assignor may reasonably  request in order to establish the authority of Assignee
to consummate the transactions  contemplated by this Agreement, the consummation
of  the  transactions   contemplated  by  this  Agreement,  the  taking  of  all
appropriate  action in connection  therewith and compliance  with the conditions
set forth in this Agreement.

                (q)   Outside Date

                      Except as otherwise  agreed by the parties hereto,  all of
the foregoing  conditions shall have  been satisfied or waived on or before 5:00
p.m. E.D.T. on June 30, 1997 (the "Outside Date").



                                       26



<PAGE>



                (r)   No Pending Superior Proposal

                      Assignor shall  not have received  and have accepted or be
considering any Superior  Proposal with respect to such Transferred  Interest in
accordance with Section 11 hereof.


SECTION 8.      Conditions Precedent to the Obligations of Assignee

                The obligation of Assignee to purchase any Transferred  Interest
from  Assignor  and assume the  obligations  related  thereto at the  applicable
Effective Time is subject to the satisfaction of the following conditions:

                (a)   Leases and Trust Agreements

                      The Lease and Trust  Agreement  and, as  applicable,  each
other Operative Agreement with respect to such Transferred  Interest shall be in
full force and effect.

                (b)   Due Authorization, Execution and Delivery

                      This  Agreement,  the Assignment and Assumption  Agreement
and any of the other  Ancillary  Agreements  with  respect  to such  Transferred
Interest to which Assignor is a party shall have been duly authorized,  executed
and delivered by Assignor.

                (c)   Representations and Warranties

                      The  representations  and warranties of Assignor contained
herein  shall be true and correct in all material  respects as of the  Effective
Time  with  the same  force  and  effect  as  though  such  representations  and
warranties had been made on and as of such Effective Time.

                (d)   Schedules

                      Schedule 5(d) shall not have been  supplemented or amended
by Assignor to include a default or event of default caused by the filing by the
Lessee of the  Aircraft  that is the subject of such  Transferred  Interest  for
protection from its creditors.



                                       27



<PAGE>



                (e)   Partnership Authorization Matters

                      Assignee shall have received:

                      (i) Resolutions of the board of directors of PIMC, general
partner of Assignor,  certified by the Secretary or Assistant Secretary thereof,
as of the date of this  Agreement,  to be duly  adopted  and in full  force  and
effect  on  such  date,   authorizing  (i)  the  consummation  of  each  of  the
transactions contemplated by this Agreement and each of the Ancillary Agreements
to which Assignor is a party and (ii) specific  officers or  representatives  to
execute  and  deliver  this  Agreement  and the  Ancillary  Agreements  to which
Assignor is a party.

                      (ii) A copy of the certificate of limited  partnership and
all  amendments  thereto  of  Assignor,  certified  as of a  recent  date by the
Secretary of State of the  jurisdiction  of its  organization  and a copy of the
agreement  of limited  partnership,  as amended,  certified by an officer of the
general partner.

                      (iii)  Certificates  of  the  Secretary  or  an  Assistant
Secretary of PIMC, certified by the Secretary or Assistant Secretary thereof, as
to the incumbency and signatures of the  representatives  thereof executing this
Agreement  or any of the  Ancillary  Agreements  to which  Assignor  is a party,
together  with  evidence  of the  incumbency  of  such  Secretary  or  Assistant
Secretary.

                      (iv) As of  each  Effective  Time,  a  certificate  of the
Secretary or an Assistant  Secretary of PIMC  certifying  that the  certificates
delivered in  accordance  with  clauses  (i),  (ii) and (iii) above are true and
correct  with  respect to such  Transferred  Interest  being  conveyed as of the
applicable Effective Time.

                (f)   Illegality; No Proceedings

                      At the applicable  Effective  Time, the performance of the
transactions  contemplated  hereby,  upon the  terms  and  conditions  set forth
herein,  shall not, in the reasonable judgment of Assignee,  violate,  and shall
not  subject  Assignee  to any  penalty or  liability  under,  any law,  rule or
regulation binding upon Assignee.  At the applicable Effective Time, no legal or
governmental action, suit or proceeding shall have been instituted or threatened
before  any  court,  administrative  agency or  tribunal,  nor shall any  order,
judgment  or decree  have been  issued or  proposed  to be issued by any  court,
administrative agency or tribunal to set aside, restrain,  enjoin or prevent the
consummation of this Agreement or the transactions contemplated hereby.



                                       28



<PAGE>



                (g)   Approvals and Consents

                      All  approvals  and  consents  and other  items  listed on
Schedule 5(b) shall have been obtained.

                (h)   No Total Loss

                      At the applicable  Effective Time, there shall not exist a
Total Loss with respect to the Aircraft related to such Transferred Interest.

                (i)   Opinions

                      Assignee   shall   have   received   opinions   reasonably
satisfactory to Assignee,  dated as of the first Effective Time from (i) Haight,
Gardner,  Poor & Havens,  California  counsel to  Assignor,  with respect to due
organization  and good standing and (ii) Weil,  Gotshal & Manges LLP, counsel to
Assignor, that the execution and delivery of this Agreement and the consummation
of the transactions  contemplated thereby and compliance by the Company with the
provisions  thereof  will  not  conflict  with or  violate  any  federal  law or
regulation (other than federal securities laws, the Hart-Scott Rodino Act or any
federal laws or regulations  relating to the Federal Aviation  Administration or
civil or commercial aviation).  Assignee shall also have received,  with respect
to  each  Transferred  Interest,  at the  applicable  Effective  Time  for  such
Transferred  Interest,  an  opinion  from (i)  Haight,  Gardner,  Poor & Havens,
California  counsel to  Assignor  and (ii)  Special  FAA  Counsel or Special CAA
Counsel,  as applicable,  in each case with respect to such matters  relating to
such  Transferred  Interest  and to such  effect as  Assignee  shall  reasonably
request.

                (j)   Location of Aircraft

                      Subject  to  Section  4(c)  hereof,  the  location  of the
Aircraft  relating to each Transferred  Interest shall be acceptable to Assignee
at the applicable Effective Time for such Transferred Interest.

                (k)   Other Instruments and Documents; Additional Information

                      Assignee  shall have received such other  instruments  and
documents as Assignee or its counsel shall  reasonably  request.  Assignee shall
have  received  such other  documents  and evidence  with respect to Assignor as
Assignee may reasonably  request in order to establish the authority of Assignor
to consummate the transactions  contemplated by this Agreement, the consummation
of  the  transactions   contemplated  by  this  Agreement,  the  taking  of  all
appropriate  partnership action in connection  therewith and compliance with the
conditions set forth in this Agreement.



                                       29



<PAGE>



                (l)   Outside Date

                      Except as otherwise  agreed by the parties hereto,  all of
the foregoing conditions  shall have  been satisfied or waived on or before 5:00
p.m. E.D.T. on the Outside Date.


SECTION 9.      Payments

                To the extent not  transferred  in  accordance  with  Section 4,
Assignor hereby covenants and agrees to pay over to Assignee, no later than five
(5)  Business  Days after  receipt  by  Assignor  from and after the  applicable
Effective  Time,  any  Aircraft  Income  or Lessee  Deposits  paid to or for the
benefit of Assignor that constitute a Transferred  Interest earlier  transferred
to Assignee  hereunder  (including  any  amounts  payable as interest in respect
thereof),  and until so paid  over,  any  Aircraft  Income  or  Lessee  Deposits
received  by  Assignor  in respect  of any such  Transferred  Interest  shall be
received and held by Assignor in trust for Assignee.  Assignee hereby  covenants
and agrees to pay over to Assignor,  no later than five (5) Business  Days after
receipt by Assignee from and after the  applicable  Effective  Time, any amounts
paid to or for the benefit of Assignee  that  constitute  Reserved  Rights which
relate to a Transferred  Interest  earlier  transferred  (including  any amounts
payable as interest in respect thereof), and until so paid over any such amounts
received  by  Assignee  shall be  received  and held by  Assignee  in trust  for
Assignor.


SECTION 10.     Certain Notices

                Assignor  hereby  covenants  and agrees  promptly  to forward to
Assignee any notice  Assignor  receives  from any party to any of the  Operative
Agreements (other than Assignee)  relating to any of the Transferred  Interests.
Assignee hereby  covenants and agrees promptly to forward to Assignor any notice
Assignee receives from any party to any of the Operative  Agreements (other than
Assignor) pursuant to and in accordance with this Agreement,  the Assignment and
Assumption  Agreement,  the Trust  Agreements or any other  Operative  Agreement
related to the Reserved  Rights.  Assignor hereby covenants and agrees to notify
Assignee of any Reserved Right,  describing the  circumstances  of such Reserved
Right in reasonable  detail,  promptly  after  Assignor has actual  knowledge of
facts or  circumstances  giving rise to a Reserved Right and that such facts and
circumstances constitute a Reserved Right.



                                       30



<PAGE>



SECTION 11.     Superior Proposal

                (a) Each party agrees and  acknowledges  that from and after the
date hereof until the close of business on April 28, 1997, if Assignor  receives
a Superior Proposal,  Assignor may (i) furnish any information  requested by the
Offering Party with respect to such Superior  Proposal  (other than the contents
of this Agreement or any Ancillary Agreement),  (ii) participate in negotiations
with such Offering Party  regarding  such Superior  Proposal or (iii) enter into
one or more  letters of intent,  term sheets or  agreements  with respect to any
Superior Proposals;  provided, however, that if Assignor proposes to take any of
the actions specified in clause (iii) hereof, Assignor shall give Assignee prior
written notice setting forth Assignor's proposed actions.

                (b) Not  later  than the  close  of  business  on May 12,  1997,
Assignor  shall  require each  Offering  Party with whom it is still  engaged in
discussions  to submit a final  binding  offer,  subject only to  acceptance  by
Assignor.  Not later than the close of business on May 16, 1997,  Assignor shall
(i) determine  whether any such offer constitutes a Superior  Proposal,  (ii) if
there  is more  than one  Superior  Proposal,  select  which  Superior  Proposal
Assignor  intends to accept and (iii) provide written notice to Assignee setting
forth all the material terms and conditions of such selected  Superior  Proposal
("SP Notice").

                (c) After receipt of the SP Notice, Assignee shall have five (5)
days to notify  Assignor  of its  agreement  to modify  this  Agreement  and any
Ancillary  Agreement as necessary  to acquire the  Transferred  Interests at the
same price and under the same terms and conditions as set forth in the SP Notice
("Assignee  Acceptance Notice");  provided further,  however, if under the terms
set forth in the SP Notice  Assignor is proposing to accept property (other than
cash or promissory  notes),  Assignee shall have the right to substitute cash in
an amount equal to the value of such other property.

                (d) If  Assignor  does not give an SP Notice to  Assignee  on or
before May 16,  1997,  or if  Assignee  gives an Assignee  Acceptance  Notice to
Assignor in accordance with subsection (c) hereof, neither Assignor nor Assignee
shall thereafter have any right to terminate this Agreement  pursuant to Section
15(c).


SECTION 12.     Further Assurances

                Each  party  agrees,  upon the  reasonable  request of the other
party at any time and from time to time,  promptly  to execute  and  deliver all
such further  documents and promptly to take and forbear from all such action as
may be reasonably  necessary or appropriate in order to more effectively confirm
or  carry  out  the  provisions  of  this  Agreement  or any  of  the  Ancillary
Agreements,  including,  without  limitation,  the filing of any  Assignment and



                                       31



<PAGE>



Assumption  Agreement  with the FAA  pursuant to the Act or the CAA. The parties
agree that the transactions  are fully effective as of the applicable  Effective
Time and that they will  treat the  transactions  as such for all  purposes  and
acknowledge  that any filings with the FAA or the CAA are merely  ministerial in
nature.


SECTION 13.     Taxes and Indemnities

                (a)   Transfer Taxes

                      Assignee hereby covenants and agrees to pay (and indemnify
and hold Assignor  harmless on an After-Tax Basis for) any and all registration,
document  or filing  fees and any and all  sales  taxes,  use taxes and  similar
transfer  taxes  (including,  without  limitation,  any  charges,  such as gross
receipts taxes (but excluding any taxes in the nature of any income tax) in lieu
thereof)  (collectively,  "Transfer  Taxes"),  that may be imposed in connection
with the sale,  assignment and transfer of any Transferred  Interests including,
without limitation,  any penalties, fines or interest thereon and those Transfer
Taxes relating to the transfer of rights and other  interests in and to, and the
act of  assuming  duties,  liabilities  and  obligations  in, to and under  this
Agreement, the Assignment and Assumption Agreements,  the Transferred Interests,
the Aircraft and the  Operative  Agreements  together  with all  reasonable  and
documented  out-of-pocket  costs,  expenses  and  attorney's  fees  incurred  in
connection  therewith.  Assignor hereby agrees to perform such acts,  including,
without  limitation,  attending  the  closing of the  transactions  contemplated
hereby at a site or sites selected by Assignee,  and executing such documents as
may be reasonably  necessary to minimize  Transfer  Taxes.  The parties  further
agree to furnish each other with such  documents  and  certificates  as they may
reasonably  request in connection with any claims for exemption from the payment
of Transfer Taxes.

                (b)   Notice of IRS Reports

                      (i) Assignor  shall  promptly  notify  Assignee of receipt
from the IRS of any written  proposed or final revenue  agent's  report,  30-day
letter or notice of deficiency in which an adjustment is proposed to the federal
income  taxes of  Assignor  for which any of the  Lessees  would be  required to
indemnify  Assignor under any Operative  Agreement and,  thereafter,  shall upon
request keep  Assignee  apprised at least monthly of the progress of any protest
or proceeding in respect of such adjustment.

                      (ii) Assignee  shall promptly  notify  Assignor of receipt
from the IRS of any written  proposed or final revenue  agent's  report,  30-day
letter or notice of deficiency in which an adjustment is proposed to the federal
income  taxes of  Assignee  for which any of the  Lessees  would be  required to
indemnify  Assignee under any Operative  Agreement and,  thereafter,  shall upon



                                       32



<PAGE>



request keep  Assignor  apprised at least monthly of the progress of any protest
or proceeding in respect of such adjustment.

                (c)   Assignor's Indemnity

                      Assignor  hereby  covenants  and  agrees  upon  demand  of
Assignee to pay and assume liability for, and indemnify,  protect,  defend, save
and keep  harmless  Assignee  and each of its  Affiliates  and in each such case
their  respective  directors,  officers,  employees  and agents  (the  "Assignee
Indemnitees"), on an After-Tax Basis, from and against any and all Damages which
may at any time or from time to time be imposed  upon,  incurred  by or asserted
against  any  of the  Assignee  Indemnitees  in any  way  relating  directly  or
indirectly  to,  or  arising  out  of,  (i)  any  inaccuracy  or  breach  of any
representation  or  warranty  made  by  Assignor  under  this  Agreement  or any
Ancillary Agreement to which it is a party, (ii) the ownership,  leasing, use or
operation of any Transferred  Interest prior to the Effective Time applicable to
such  Transferred  Interest  including,   without  limitation,  any  obligations
relating to the Trust Estate or any of the Operative Agreements relating to such
Transferred Interest which arise from acts,  omissions,  events or circumstances
occurring  or  accruing  prior  to the  Effective  Time  with  respect  to  such
Transferred  Interest  but not  including  any  Assumed  Liabilities,  (iii) the
failure of  Assignor  to perform or observe  any of its  obligations  under this
Agreement  or  any  Ancillary  Agreement  to  which  it  is a  party,  (iv)  any
litigation, claim or action brought by a limited partner of Assignor against any
Assignee  Indemnitee  to the extent such  litigation,  claim or action  directly
arises out of and relates to the  transactions  contemplated  by this  Agreement
other than to the extent any  litigation,  claim or action  relates  directly or
indirectly  to, or arises out of, the breach by such Assignee  Indemnitee of the
terms of this Agreement or any Ancillary Agreement or (v) any Liens set forth on
Schedule 5(h) hereto (other than the Lien asserted by Bounty  Aviation or any of
its affiliates against the engine bearing serial number 674579) (the "Non-Bounty
Liens");  provided that (a) Assignor  shall not be liable for any Damages to the
extent that Assignee has a recovery  available to it under any insurance  policy
which was in effect on or prior to the applicable  Effective  Time; (b) Assignor
shall not be liable for any  Damages  attributable  to the gross  negligence  or
willful misconduct of Assignee or its Affiliates;  and (c) Assignor shall not be
liable for any  Damages in excess of the  Purchase  Price.  Notwithstanding  the
foregoing,  Assignor shall be liable  pursuant to this Section 13(c) only to the
extent  that  the  aggregate   cumulative   Damages  incurred  by  the  Assignee
Indemnitees which are required to be indemnified by Assignor exceed $50,000 (the
"Threshold  Amount") in which event,  Assignor shall then also be liable for the
initial  $50,000  of  aggregate  cumulative  Damages  incurred  by the  Assignee
Indemnitees;  provided,  that,  with respect to any Non-Bounty Lien set forth on
Schedule 5(h) hereto,  (x) the Threshold  Amount  limitation shall not apply and
Assignor shall be liable for all Damages arising from such Non-Bounty  Liens and
(y) amounts  expended by Assignor to discharge  and release such Liens shall not
constitute  Damages to be applied  toward  the  Threshold  Amount and only those



                                       33



<PAGE>



expenses,  if any,  actually  incurred  by  Assignee  in  connection  with  such
discharge or release shall be so applied.  Assignee acknowledges and agrees that
Assignor shall have no liability to Assignee (whether by way of  indemnification
or otherwise) for any Liens asserted by Bounty Aviation or any of its affiliates
against the engine bearing serial number 674579.

                (d)   Assignee's Indemnity

                      Assignee  hereby  covenants  and  agrees  upon  demand  of
Assignor to pay and assume liability for, and indemnify,  protect,  defend, save
and keep  harmless,  Assignor and each of its  Affiliates  and in each such case
their  respective  directors,  officers,  employees  and agents  (the  "Assignor
Indemnitees"), on an After-Tax Basis, from and against any and all Damages which
at any time or from time to time may be imposed  upon,  incurred  by or asserted
against the Assignor  Indemnitees in any way relating directly or indirectly to,
or  arising  out of,  (i) any  inaccuracy  or  breach of any  representation  or
warranty made by Assignee or any of its  Affiliates  under this Agreement or any
Ancillary  Agreement to which it or any of its  Affiliates is a party,  (ii) the
ownership, leasing, use or operation of any Transferred Interest on or after the
Effective  Time  applicable  to such  Transferred  Interest  including,  without
limitation, any obligations relating to the Trust Estate or any of the Operative
Agreements  relating  to  such  Transferred  Interest  which  arise  from  acts,
omissions,  events  or  circumstances  occurring  or  accruing  on or after  the
Effective Time with respect to such Transferred  Interest,  (iii) the failure of
Assignee or any of its Affiliates to perform or observe any of their  respective
obligations  under this Agreement or any Ancillary  Agreement to which it or any
of  its  Affiliates  is a  party,  (iv)  any  Assumed  Liabilities  or  (v)  any
modification,  amendment  or other  change  to any of the  Operative  Agreements
entered into by Assignee, or to which Assignee consents or forbears, in any such
case  without  the prior  written  consent of Assignor  (such  consent not to be
unreasonably  withheld)  that  affects  any of the  Reserved  Rights;  provided,
however,  that with respect to any Transferred  Interest which includes a Lease,
such indemnification  obligation shall only relate to modifications,  amendments
or other changes made or agreed to during the period  beginning on the Effective
Date  applicable  to such  Transferred  Interest  and ending on the date that is
twenty-four  (24) months  after the  termination  of the Lease  included in such
Transferred  Interest  (which  period  shall be deemed to include any  renewals,
extensions or continuations of such Lease).  Notwithstanding the foregoing,  (a)
Assignee  shall not be liable for any Damages to the extent that  Assignor has a
recovery  available to it under any  insurance  policy which was in effect on or
prior to the Effective  Time;  (b) Assignee  shall not be liable for any Damages
attributable  to the gross  negligence or willful  misconduct  of Assignor;  (c)
Assignee shall not be liable for any Damages in excess of the Purchase Price and
(d) Assignee  shall be liable  pursuant to this Section 13(d) only to the extent
that the  aggregate  Damages  incurred  by the  Assignor  Indemnitees  which are
required to be indemnified by Assignee  exceed $50,000 in which event,  Assignee
shall  then also be liable  for the  initial  $50,000  of  aggregate  cumulative
Damages incurred by the Assignor Indemnitees.



                                       34



<PAGE>



                (e)   Survival of Representations and Warranties

                      All  representations  and warranties of the parties hereto
contained in this Agreement (including all Schedules hereto) or in any document,
statement,  certificate or other  instrument  referred to herein or delivered at
the applicable  Effective Time in connection with the transactions  contemplated
hereby,  that (i) relate to any  Transferred  Interest  which  includes a Lease,
shall survive until the later of (A) twenty-four (24) months after the Effective
Time applicable to such Transferred Interest or (B) twelve (12) months after the
expiry of the Lease included in such  Transferred  Interest  (which period shall
not be deemed to include  any  renewals,  extensions  or  continuations  of such
Lease), (ii) relate to any Transferred  Interest which does not include a Lease,
shall survive until  twenty-four (24) months after the Effective Time applicable
to such Transferred Interest and (iii) do not relate to a Transferred  Interest,
shall survive until  twenty-four  (24) months after the first  Effective Time to
occur under this Agreement.


SECTION 14.     Indemnification Procedure

                (a)  Any  Assignee   Indemnitee  or  Assignor   Indemnitee  (the
"Indemnified Party") seeking  indemnification  hereunder shall give to the party
obligated under this Agreement to provide  indemnification  to such  Indemnified
Party (the  "Indemnitor")  a notice  ("Claim  Notice")  describing in reasonable
detail the facts  giving rise to its claim for  indemnification  hereunder,  and
shall  include  in such  Claim  Notice  (if then  known) the amount or method of
computation of the amount of the claim, and a reference to the provision of this
Agreement or any other agreement,  document or instrument executed and delivered
hereunder or in  connection  herewith  upon which such claim is based;  provided
that a Claim Notice in respect of any action at law or suit in equity against an
Indemnified Party by a third party, as to which  indemnification  will be sought
(a "Third Party  Action"),  shall be given  promptly after the action or suit is
commenced;  provided, further, that failure of the Indemnified Party to give the
Indemnitor  prompt  notice in respect of any such Third Party Action as provided
herein shall not relieve the Indemnitor of its obligations hereunder,  except to
the  extent  such  Indemnitor  shall  have been  materially  prejudiced  by such
failure.

                (b) The  Indemnitor  shall be entitled  (but not  obligated)  to
assume the defense or settlement  of such Third Party Action,  or to conduct any
negotiations  or  proceedings  to settle or otherwise  eliminate any Third Party
Claim  and shall  pay the  reasonable  fees and  disbursements  of such  counsel
related to such Third Party Action.  If the Indemnitor  assumes any such defense
or settlement or any such negotiations, it shall pursue such defense, settlement
or  negotiations  in good  faith.  If the  Indemnitor  fails to elect in writing
within 30  Business  Days of the  notification  referred to above to assume such
defense, the Indemnified Party may engage counsel to defend, settle or otherwise



                                       35



<PAGE>



dispose  of such  action  or  proceeding,  which  counsel  shall  be  reasonably
satisfactory to the Indemnitor.  In any such Third Party Action, any Indemnified
Party shall have the right to retain its own counsel,  but the fees and expenses
of such counsel shall be at the expense of such Indemnified Party unless (i) the
Indemnitor and the Indemnified Party shall have mutually agreed to the retention
of such counsel or (ii) the named parties to any such proceeding  (including any
impleaded  parties)  include both the Indemnitor and the  Indemnified  Party and
representation  of both the  Indemnitor  and the  Indemnified  Party by the same
counsel would be inappropriate  due to actual or potential  differing  interests
between them. It is understood that the Indemnitor shall not, in connection with
any Third Party Action or related  Third Party Action in the same  jurisdiction,
be liable for the fees and expenses of more than one separate  firm (in addition
to local  counsel)  for all  Persons to be  indemnified  pursuant to Section 13;
provided that the Indemnitor will be so liable if (x) the Indemnified  Party has
reasonably  concluded that there may be legal  defenses  available to it in such
Third Party Action that are different from or in addition to those  available to
the  Indemnitor  or (y) a conflict  or  potential  conflict  exists  between the
Indemnified  Party and the  Indemnitor in such Third Party Action (in which case
the Indemnitor will not have the right to direct the defense of such Third Party
Action with respect to which such conflict  exists on behalf of the  Indemnified
Party), but only to the extent such fees and expenses are incurred in connection
with such  conflicting  issues.  Any such  separate  firm shall be designated in
writing by the  Indemnified  Party.  The Indemnitor  shall not be liable for any
settlement  of any  proceeding of such Third Party Action  effected  without its
written  consent,  but if the Indemnitor  consents to any such  settlement,  the
Indemnitor  agrees to indemnify the Indemnified  Party from and against any loss
or liability for which  indemnity is available  hereunder and which is specified
in such settlement or judgment.  No Indemnitor shall,  without the prior written
consent  of the  Indemnified  Party  (which  consent  shall not be  unreasonably
withheld  or  delayed),  effect any  settlement  of any  pending  or  threatened
proceeding  in  respect of which any  Indemnified  Party is or could have been a
party and indemnity could have been sought hereunder by such Indemnified  Party,
unless such settlement  includes an  unconditional  release of such  Indemnified
Party  from  all  liability  or  claims  that  are the  subject  matter  of such
proceeding and such settlement only involves the payment of money.

                (c) Assignor  shall be entitled in all cases (but not obligated)
to assume the  settlement and to conduct  negotiations  or proceedings to obtain
the  discharge  and  release  of or  otherwise  eliminate  any Lien set forth on
Schedule  5(h)  hereto.  If  Assignor  assumes any such  settlement  or any such
negotiations,  it shall pursue such  settlement or  negotiations  in good faith.
Assignor  shall not be liable for any  settlement  or discharge of any such Lien
effected  without its  written  consent,  but if  Assignor  consents to any such
settlement or discharge,  Assignor agrees to indemnify Assignee from and against
any loss or liability  for which  indemnity is available  hereunder and which is
specified in such settlement or discharge.



                                       36



<PAGE>



SECTION 15.     Termination

                This  Agreement may be terminated at any time prior to the first
Effective Time to occur pursuant to the terms hereof:

                (a)   by mutual written consent of Assignee and Assignor;

                (b) by either party by written  notice to the other party if the
transactions  contemplated  hereby  have not been  consummated  on or before the
Outside Date;  provided,  however,  that the right to terminate  this  Agreement
under this Section  15(b) shall not be  available to any party whose  failure to
fulfill any of its obligations under this Agreement has been the cause of or has
resulted  in  the  failure  of  the  transactions   contemplated   hereby  being
consummated on or before the Outside Date; or

                (c) by (i) Assignor if (a) Assignor accepts or recommends one or
more  Superior  Proposals  to its  partners  or  resolves  to do  either  of the
foregoing and (b) Assignee no longer has the right  pursuant to Section 11(c) to
deliver an  Assignee  Acceptance  Notice to  Assignor or (ii) by Assignee if (x)
Assignor has given an SP Notice and (y) at least  fourteen (14) days have passed
since the date on which Assignee's right pursuant to Section 11(c) to deliver an
Assignee Acceptance Notice terminated.


SECTION 16.     Miscellaneous

                (a)   Notices

                      All    notices,    demands,    declarations    and   other
communications  required  by this  Agreement  shall be in  writing  and shall be
effective  (i) if  given  by  facsimile,  when  transmitted,  (ii) if  given  by
registered or certified mail, three (3) Business Days after being deposited with
the U.S. Postal Service,  (iii) if given by courier,  when received,  or (iv) if
personally delivered, when so delivered, addressed:

                If to Assignor, to:

                      c/o Polaris Investment Management Corporation
                      201 Mission Street, 27th Floor
                      San Francisco, CA  94105
                      Attention:  President
                      Facsimile Number:



                                       37



<PAGE>



                With a copy to:

                      c/o Polaris Investment Management Corporation
                      201 High Ridge Road, 1st Floor
                      Stamford, CT  06927-4900
                      Attention:  Portfolio Management
                      Facsimile Number:  (203) 357-4585

or to such  other  address as  Assignor  shall  from time to time  designate  in
writing to Assignee; and

                If to Assignee, to:

                      Triton Aviation Services IV LLC
                      55 Green Street, Suite 500
                      San Francisco, CA  94111
                      Attn:  President
                      Facsimile Number:  (415) 398-9184

or to such other address as Assignee may from time to time  designate in writing
to Assignor.

                (b)   Headings

                      Headings  used herein are for  convenience  only and shall
not in any way affect the  construction  of, or be taken into  consideration  in
interpreting, this Agreement.



                                       38



<PAGE>



                (c)   References

                      Any  reference  to a specific  Section  or Section  number
shall be  interpreted  as a reference to that Section of this  Agreement  unless
otherwise expressly provided.

                (d)   GOVERNING LAW

                      THIS  AGREEMENT,   INCLUDING,   WITHOUT  LIMITATION,   THE
INTERPRETATION,  CONSTRUCTION,  VALIDITY AND  ENFORCEABILITY  THEREOF,  SHALL BE
CONSTRUED AND ENFORCED IN ACCORDANCE  WITH THE LAWS OF THE STATE OF  CALIFORNIA,
EXCLUDING ANY CONFLICT OF LAWS RULES THEREOF.

                (e)   Severability

                      If any provision hereof should be held invalid, illegal or
unenforceable  in any respect in any  jurisdiction,  then, to the fullest extent
permitted by law, (i) all other provisions hereof shall remain in full force and
effect in such  jurisdiction  and shall be  construed  in order to carry out the
intentions  of the  parties  hereto as nearly as may be  possible  and (ii) such
invalidity,  illegality  or  unenforceability  shall not  affect  the  validity,
legality or enforceability of such provision in any other jurisdiction.

                (f)   Amendments in Writing

                      No  amendment,   modification,   waiver,   termination  or
discharge of any provision of this  Agreement,  nor any consent to any departure
by  Assignor  or  Assignee  from any  provision  hereof,  shall in any  event be
effective  unless  the same  shall be in  writing  and  signed by  Assignor  and
Assignee,  and  each  such  amendment,   modification,  waiver,  termination  or
discharge shall be effective only in the specific  instance and for the specific
purpose  for which  given.  No  provision  of this  Agreement  shall be  varied,
contradicted  or  explained  by  any  oral  agreement,   course  of  dealing  or
performance  or any other  matter not set forth in an  agreement  in writing and
signed by Assignor and Assignee.

                (g)   Expenses

                      Each of Assignor and Assignee shall be responsible for all
fees and  expenses  incurred  by it,  including  for  legal  counsel  and  other
advisors,  in  connection  with  this  Agreement,  any  Ancillary  Agreement  or
otherwise relating to the transactions  contemplated hereby; provided,  however,
all costs and expenses  incurred in connection  with Special FAA Counsel or with
Special  CAA  Counsel  and all fees and  expenses  payable to the  Escrow  Agent
pursuant  to the  Escrow  Agreement  shall be shared  equally  by  Assignor  and
Assignee;  provided,  further,  if either  Assignor or Assignee  terminates this
Agreement in accordance  with Section 15(c) hereof,  Assignor shall pay or cause
to be paid to Assignee within two (2) Business Days of such termination a fee in
immediately  available  funds in an  amount  equal to one and  one-half  percent
(1.5%) of the Purchase Price.



                                       39



<PAGE>




                (h)   Execution in Counterparts

                      This  Agreement  and any  amendments,  waivers or consents
hereto may be executed by Assignor  and  Assignee 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 one and the same instrument.

                (i)   Entire Agreement

                      This Agreement and the Ancillary Agreements constitute the
entire  agreement of Assignor and  Assignee  with respect to the subject  matter
hereof or thereof, and all prior  understandings or agreements,  whether written
or oral,  between  Assignor and Assignee with respect to such subject matter are
hereby superseded in their entirety.

                (j)   Exhibits

                      The exhibits attached hereto are incorporated by reference
herein and shall have the same force and effect with  respect to the  provisions
set forth therein as though fully set forth in this Agreement.

                (k)   Assignment and Successors

                      This Agreement may not be assigned  except by operation of
law. This  Agreement  shall be binding  upon,  shall inure to the benefit of and
shall be enforceable by Assignor and Assignee and their respective successors.

                (l)   Confidentiality

                      This   Agreement   and  the   Ancillary   Agreements   are
confidential documents between the parties thereto and shall not be disclosed by
either party to third  parties  without the prior  written  consent of the other
party other than (i) to such party's directors,  officers, employees,  advisors,
auditors,  agents or representatives  who are advised of the confidential nature
of this Agreement and the Ancillary  Agreements  (and for whose  compliance with
the terms hereof, such party shall be liable),  (ii) to the extent disclosure as
required  by any  applicable  law,  regulation  or  judicial  order  or (iii) in
connection  with the  disclosure  requirements  of the  Securities  and Exchange
Commission.  The obligations and protections contained in this Section 16(l) are
in addition to and not a replacement of any obligations and protections provided
pursuant to any  confidentiality  agreement  executed by and currently in effect
between the parties hereto or any of their respective Affiliates.



                                       40

<PAGE>





                                   SCHEDULE 1

                              AIRCRAFT AND LESSEES

        Serial No.               Aircraft Type        Lessee
        ----------               -------------        ------

PART A (DOMESTIC AIRCRAFT)
          19711                    737-200               N/A
          20236                    737-200               N/A
          45791                    DC-9-32           Continental
          47111                    DC-9-32           Continental
          47112                    DC-9-32           Continental
          47521                    DC-9-32           Continental
          47524                    DC-9-32           Continental
          22983                  727-200 ADV             ATA
          22001                  727-200 ADV             ATA

PART B  (FOREIGN AIRCRAFT)
          20807                 737-200 ADV         TBG Airways
          21694                 737-200 ADV         TBG Airways
          21335                 737-200 ADV          GB Airways
          21336                 737-200 ADV          GB Airways







<PAGE>







                                   SCHEDULE 2

                                     LEASES

19711     None

20236     None

20807     Aircraft Lease  Agreement  [B],  dated as of February 23, 1994,  among
          Polaris  Aircraft  Income  Fund  IV,  as  Lessor,  Ambassador  Airways
          Limited,  as  Operator,   and  TBG  Airways  Limited,  as  Lessee,  as
          supplemented  by Lease  Supplement [B] No. 1, dated as of February 25,
          1994.

21694     Aircraft Lease  Agreement  [A],  dated as of February 23, 1994,  among
          Polaris  Aircraft  Income  Fund  IV,  as  Lessor,  Ambassador  Airways
          Limited,  as  Operator,   and  TBG  Airways  Limited,  as  Lessee,  as
          supplemented  by Lease  Supplement [A] No. 1, dated as of February 25,
          1994.

21335     Aircraft  Lease  Agreement  [A],  dated as of January 26, 1994,  among
          Polaris  Aircraft Income Fund IV, as Lessor,  GB Airways  Limited,  as
          Operator,  and  Independent  Aviation  Group  Limited,  as Lessee,  as
          supplemented by Lease Supplement [A] No. 1, dated as of _____________,
          1994.

21336     Aircraft  Lease  Agreement  [B],  dated as of January 26, 1994,  among
          Polaris  Aircraft Income Fund IV, as Lessor,  GB Airways  Limited,  as
          Operator,  and  Independent  Aviation  Group  Limited,  as Lessee,  as
          supplemented by Lease Supplement [B] No. 1, dated as of _____________,
          1994.

45791, 47111, 47112, 47521, 47524

          Aircraft  Lease  Agreement,  dated as of June 10, 1988,  between First
          Security  Bank  of  Utah,   National   Association,   as  Lessor,  and
          Continental  Airlines,  Inc.,  as  Lessee,  as  supplemented  by Lease
          Supplement  Nos.  1, 2, 3, 4 and 5 dated as of June 30,  1988,  and as
          amended by Amendment No. 1 dated as of June 28, 1996.

22983     Aircraft Lease Agreement, dated as of December 15, 1992, between First
          Security Bank of Utah, National  Association,  as Lessor, and American
          Trans Air, Inc., as Lessee,  as supplemented by Lease Supplement No. 1
          dated  December  30, 1992,  as amended by Amendment  No. 1 dated as of
          February 24, 1993, and Amendment No. 2 dated as of January 31, 1994.







<PAGE>









SCHEDULE 2: LEASES



22001     Aircraft Lease Agreement, dated as of December 15, 1992, between First
          Security Bank of Utah, National  Association,  as Lessor, and American
          Trans Air, Inc., as Lessee,  as supplemented by Lease Supplement No. 1
          dated  December  30, 1992,  as amended by Amendment  No. 1 dated as of
          February 24, 1993, and Amendment No. 2 dated as of January 31, 1994.






                                        2



<PAGE>







                                   SCHEDULE 3

                            FOREIGN AIRCRAFT ENGINES


  Aircraft         Engine              Engine          Engine
 Serial No.      Manufacturer           Type           Serial Nos.
 ----------      ------------           ----           -----------

20807         Pratt & Whitney          JT8D-15         708388 & 688675

21694         Pratt & Whitney          JT8D-15         688672 & 709058

21335         Pratt & Whitney          JT8D-15         688617 & 708397

21336         Pratt & Whitney          JT8D-15         702912 & 688673









<PAGE>







                                   SCHEDULE 4

                           OTHER OPERATIVE AGREEMENTS

19711     None

20236     None

20807     Guaranty  [B],  dated as of February 23, 1994,  by Goldcrest  Aviation
          Limited, in favor of Polaris Aircraft Income Fund IV.

          Letter  Agreement No. 1 to Aircraft  Lease  Agreement [B], dated as of
          February 23, 1994,  among Polaris  Aircraft Income Fund IV, as Lessor,
          TBG Airways Limited,  as Lessee,  and Ambassador  Airways Limited,  as
          Operator.

21694     Guaranty  [A],  dated as of February 23, 1994,  by Goldcrest  Aviation
          Limited, in favor of Polaris Aircraft Income Fund IV.

          Letter  Agreement No. 1 to Aircraft  Lease  Agreement [A], dated as of
          February 23, 1994,  among Polaris  Aircraft Income Fund IV, as Lessor,
          TBG Airways Limited,  as Lessee,  and Ambassador  Airways Limited,  as
          Operator.

21335     Letter  Agreement No. 1 to Aircraft  Lease  Agreement [A], dated as of
          January 26, 1994, among Polaris Aircraft Income Fund IV, as Lessor, GB
          Airways Limited, as Operator,  and Independent Aviation Group Limited,
          as Lessee.

21336     Letter  Agreement No. 1 to Aircraft  Lease  Agreement [B], dated as of
          January 26, 1994, among Polaris Aircraft Income Fund IV, as Lessor, GB
          Airways Limited, as Operator,  and Independent Aviation Group Limited,
          as Lessee.

45791, 47111, 47112, 47521, 47524

          Aircraft  Purchase  Agreement,  dated  as of June  10,  1988,  between
          Continental  Airlines,  Inc., as Seller,  and Polaris  Aircraft Income
          Fund IV, as Buyer.

          Tax Indemnification  Agreement, dated as of June 10, 1988, among First
          Security  Bank of  Utah,  National  Association,  as  Lessor,  Polaris
          Aircraft  Income Fund IV, as Beneficiary,  and  Continental  Airlines,
          Inc., as Lessee.



<PAGE>



SCHEDULE 4: OTHER OPERATIVE AGREEMENTS







          Stipulation  and Order Between  Continental  Airlines,  Inc., New York
          Airlines,  Inc.,  Polaris  Aircraft Income Fund III,  Polaris Aircraft
          Income Fund IV,  Polaris  Holding  Company and First  Security Bank of
          Utah,  N.A., as Owner Trustee  Concerning Five DC-9-82  Aircraft,  Six
          727-22 Aircraft, Seven DC-9-14 Aircraft, and Five DC-9-32 Aircraft and
          Certain  Engines  and Related  Equipment,  dated as of August 8, 1991,
          approved by Bankruptcy  Court (District of Delaware,  Case Nos. 90-932
          through 90-984) on August 23, 1991.

22983     Letter  Agreement  No.  1 to  Aircraft  Lease  Agreement,  dated as of
          December 15,  1992,  between  First  Security  Bank of Utah,  National
          Association,  as Owner  Trustee,  and  American  Trans Air,  Inc.,  as
          Lessee.

22001     Letter  Agreement  No.  1 to  Aircraft  Lease  Agreement,  dated as of
          December 15,  1992,  between  First  Security  Bank of Utah,  National
          Association,  as Owner  Trustee,  and  American  Trans Air,  Inc.,  as
          Lessee.


                                       2





<PAGE>







                                  SCHEDULE 4(a)

                                 PURCHASE PRICE

                                       Purchase        Note           Cash
        Transferred Interests            Price        Amount         Amount
        ---------------------            -----        ------         ------

                             ----|
Transferred Interest 19711       |
Transferred Interest 20236       |
Transferred Interest 20807       |
Transferred Interest 21694       |
Transferred Interest 21335       |
Transferred Interest 21336       |
Transferred Interest 45791       |---  $ 29,748,000   $ 26,396,590   $ 3,351,410
Transferred Interest 47111       |     -------------  ------------   -----------
Transferred Interest 47112       |
Transferred Interest 47521       |
Transferred Interest 47524       |
Transferred Interest 22983       |
Transferred Interest 22001       |
                             ----|                                   











<PAGE>







                                   SCHEDULE 5

                                 OWNER TRUSTEES

    Serial No.                          Owner Trustee
   -----------       -------------------------------------------
      19711          First Security Bank, National Association *
      20236          First Security Bank, National Association *
      20807          None
      21694          None
      21335          None
      21336          None
      45791          First Security Bank, National Association *
      47111          First Security Bank, National Association *
      47112          First Security Bank, National Association *
      47521          First Security Bank, National Association *
      47524          First Security Bank, National Association *
      22983          First Security Bank, National Association *
      22001          First Security Bank, National Association *



- ----------------------------
 *     Formerly known as First Security Bank of Utah, National Association






<PAGE>







                                  SCHEDULE 5(b)

                                    CONSENTS


                                                   Lessee         Owner Trustee
      Serial No.         Lessee                Consent Required   Release Needed
      ----------         ------                ----------------   --------------

        19711              N/A                       N/A                 Yes

        20236              N/A                       N/A                 Yes

        20807          TBG Airways       Yes, Lessee must sign lease     N/A
                                              novation agreement

        21694          TBG Airways       Yes, Lessee must sign lease     N/A
                                              novation agreement

        21335          GB Airways        Yes, Lessee must sign lease     N/A
                                              novation agreement

        21336          GB Airways        Yes, Lessee must sign lease     N/A
                                              novation agreement

        45791          Continental                    No                 Yes

        47111          Continental                    No                 Yes

        47112          Continental                    No                 Yes

        47521          Continental                    No                 Yes

        47524          Continental                    No                 Yes

        22983              ATA                        No                 Yes

        22001              ATA                        No                 Yes








<PAGE>







                                  SCHEDULE 5(d)

                                 ASSIGNOR CLAIMS


         None








<PAGE>







                                  SCHEDULE 5(g)

                               PENDING LITIGATION


Equity Resources,  Inc. v. Polaris Investment Management Corporation,  et al. On
or about April 18, 1997, an action  entitled Equity  Resources,  Inc. v. Polaris
Investment  Management  Corporation,  et al. was filed in the Superior Court for
the County of Middlesex, Commonwealth of Massachusetts. The complaint names each
of Polaris Investment Management  Corporation,  Polaris Aircraft Income Fund II,
Polaris  Aircraft  Income Fund III,  Polaris  Aircraft  Income Fund IV,  Polaris
Aircraft Income Fund V, and Polaris Aircraft Income Fund VI, as defendants.  The
complaint alleges that Polaris  Investment  Management  Corporation,  as general
partner of each of the partnerships, committed a breach of its fiduciary duties,
violated  applicable  partnership  law  statutory  requirements,   and  breached
provisions of the partnership  agreements of each of the foregoing  partnerships
by  failing  to  solicit  a  vote  of the  limited  partners  in  each  of  such
partnerships in connection  with the proposed sale of the Transferred  Interests
to  Assignee  and in  failing  to  disclose  material  facts  relating  to  such
transaction.  Plaintiffs  filed a  motion  seeking  to  enjoin  the  sale of the
Transferred  Interests to Assignee,  which motion was denied by the Court on May
6, 1997.  Plaintiffs  have filed an appeal from the order  denying their request
for an injunction.







<PAGE>







                                  SCHEDULE 5(h)

                                      LIENS

19711     Liens have been recorded as follows:
          o         Hubair,  Inc.  recorded a lien on or about December 8, 1995,
                    in the  amount of $751.65 in  Broward  County  Florida  (Fl.
                    Stat. 329.51, 713.75, 713.78),  recorded by the FAA on April
                    30, 1996.  
          o         Mercury Air Group, Inc. recorded liens on or about September
                    10,  1996,  in the  amounts  of  $13,614.68  and  $9,528.86,
                    respectively,  in Dade County  Florida (Fl.  Stat.  329.41),
                    recorded by the FAA on November 4, 1996. 
          o         Bounty  asserts an  unrecorded  possessory  lien against one
                    engine  (Serial  No.  674579) in the  approximate  amount of
                    $165,000 for work performed on an unrelated engine,  and for
                    approximately $89,000 for work performed on engine 674579.


20236     Liens have been recorded as follows:
          o         Hubair,  Inc.  recorded a lien on or about December 8, 1995,
                    in the amount of $11,671.42 in Broward  County  Florida (Fl.
                    Stat. 329.51, 713.75, 713.78),  recorded by the FAA on April
                    30, 1996. 
          o         Mercury Air Group, Inc. in the amount of $4600,  recorded by
                    the FAA on November 4, 1996.








<PAGE>







                                  SCHEDULE 5(j)

                                MISSING DOCUMENTS


         None








<PAGE>







                                   SCHEDULE 6

                                TRUST AGREEMENTS


19711     Tust Agreement,  dated as of January 6, 1988, between Polaris Aircraft
          Income Fund IV, as Beneficiary,  First Security Bank of Utah, National
          Association,  as Owner Trustee ("Emery  Aircraft  Leasing  Corporation
          (1988) Trust"), as amended by Trust Amendment, dated as of February 5,
          1988,  Trust  Amendment  No. 2, dated as of February 19,  1988,  Trust
          Amendment  No. 3, dated as of June 12, 1990,  Trust  Amendment  No. 4,
          dated as of June __, 1994.

20236     Trust Agreement, dated as of January 6, 1988, between Polaris Aircraft
          Income  Fund IV,  as  Beneficiary,  and First  Security  Bank of Utah,
          National  Association,  as  Owner  Trustee  ("Emery  Aircraft  Leasing
          Corporation (1988) Trust"), as amended by Trust Amendment, dated as of
          February 5, 1988,  Trust  Amendment  No. 2, dated as of  February  19,
          1988,  Trust  Amendment  No.  3,  dated  as of June  12,  1990,  Trust
          Amendment No. 4, dated as of June __, 1994.

20807     None

21694     None

21335     None

21336     None

45791, 47111, 47112, 47521, 47524


          Trust Agreement,  dated as of June 10, 1988,  between Polaris Aircraft
          Income  Fund IV,  as  Beneficiary,  and First  Security  Bank of Utah,
          National Association,  as Owner Trustee ("Continental  Airlines,  Inc.
          (1988) Trust"). *

22983     Trust  Agreement,  dated as of  November  22,  1988,  between  Polaris
          Aircraft  Income Fund IV, as  Beneficiary,  and First Security Bank of


- ----------------------------------
*        This Trust  Agreement  relates to multiple  aircraft,  all of which are
         being sold to Assignee.  Prior to the Effective Time in respect of each
         such  aircraft,  the aircraft will have been  transferred  into a newly
         created  single-aircraft  trust,  governed by a trust  agreement  under
         which Assignor is the beneficiary upon substantially the same terms and
         conditions as the Trust Agreement listed above.  Only the newly created
         trust  agreements will  constitute a part of the  Transferred  Interest
         conveyed to Assignee.






<PAGE>









SCHEDULE 6: TRUST AGREEMENTS




          Utah, National Association,  as Owner Trustee, as amended by Amendment
          No. 1 to Trust  Agreement  USAir,  Inc.  (1988-7)  Trust,  dated as of
          December 15, 1992 ("USAir, Inc. (1988-7) Trust").

22001     Trust  Agreement,  dated as of  November  23,  1988,  between  Polaris
          Aircraft  Income Fund IV, as  Beneficiary,  and First Security Bank of
          Utah, National Association,  as Owner Trustee, as amended by Amendment
          No. 1 to Trust  Agreement  USAir,  Inc.  (1988-8)  Trust,  dated as of
          December 15, 1992 ("USAir, Inc. (1988-8) Trust").








                                        2



<PAGE>






                                   SCHEDULE 7

                              UNFUNDED COMMITMENTS



       Serial No.                           Comments
       ----------   ------------------------------------------------------------

          45791     Obligation to provide  modification  financing pursuant to a
                    bankruptcy stipulaton, dated August 8, 1991.

          47111     Obligation to provide  modification  financing pursuant to a
                    bankruptcy stipulaton, dated August 8, 1991.

          47112     Obligation to provide  modification  financing pursuant to a
                    bankruptcy stipulaton, dated August 8, 1991.

          47521     Obligation to provide  modification  financing pursuant to a
                    bankruptcy stipulaton, dated August 8, 1991.

          47524     Obligation to provide  modification  financing pursuant to a
                    bankruptcy stipulaton, dated August 8, 1991.

          22983     Obligation to provide  hushkit  financing on six (6) months'
                    written  notice,  pursuant to Letter  Agreement No. 1, dated
                    December 15, 1992.

          22001     Obligation to provide  hushkit  financing on six (6) months'
                    written  notice and 80% spare engine  financing with 30 days
                    written  notice,  pursuant to Letter  Agreement No. 1, dated
                    December 15, 1992.





<PAGE>



        IN  WITNESS   WHEREOF,   the  undersigned  have  caused  this  PURCHASE,
ASSIGNMENT AND  ASSUMPTION  AGREEMENT to be duly executed as of the day and year
first written above.


                         POLARIS AIRCRAFT INCOME FUND IV

                         By:  Polaris Investment Management Corporation,
                              General Partner


                         By:    /S/ ERIC DULL
                                -----------------------------------------
                         Name:  ERIC DULL
                                -----------------------------------------
                         Title: PRESIDENT
                                -----------------------------------------



                         TRITON AVIATION SERVICES IV LLC


                         By:  Triton Aviation Services Limited, Manager



                         By:    /S/ JOHN E. FLYNN
                                ------------------------------------------
                         Name:  JOHN E. FLYNN
                                ------------------------------------------
                         Title: PRESIDENT
                                ------------------------------------------







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