MODIFICATION AGREEMENT


                  MODIFICATION AGREEMENT, dated as of _____________, 1997, among
Triton Aviation Services V LLC, a California limited liability company ("TAS V")
and Polaris Aircraft Income Fund V, a California limited  partnership ("PAIF V")
("Agreement").

                                R E C I T A L S:

                  WHEREAS,  PAIF V and  TAS V have  entered  into  that  certain
Purchase,  Assignment and Assumption  Agreement,  dated as of April 1, 1997 (the
"Purchase Agreement"); and

                  WHEREAS, pursuant to the Purchase Agreement, PAIF V agreed to
sell the Receivables to TAS V; and

                  WHEREAS,  between the date of the Purchase  Agreement  and May
28, 1997 (the date of the Effective Time for the Receivable),  the obligor under
the only Receivable failed to make a scheduled principal payment and requested a
restructuring of and modification to the terms of the Receivable;

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
covenants  hereinafter contained the receipt and sufficiency of which are hereby
agreed and acknowledged, it is agreed as follows:


                  1.  Definitions.  The  capitalized  terms  used herein and not
otherwise defined herein shall have the meaning assigned to  such  terms  in the
Purchase Agreement.


                  2.  Rescission  of  Sale of  Receivable.  The  parties  hereto
acknowledge  and agree  that the  agreement  to convey the  Receivable  to TAS V
pursuant to the Purchase  Agreement is hereby  rescinded  and rendered  null and
void ab initio and that the  Receivable  is no longer a subject of the  Purchase
Agreement,  that the Purchase Agreement and each of the Ancillary Agreements are
hereby deemed to be reformed to delete all  references to the  Receivables,  the
Receivable  Agreements,   the  Receivable  Effective  Date  and  the  Receivable
Transferred Interests and Schedule 8 to the Purchase Agreement is hereby deleted
in its entirety.



















                  3. Reduction of  Purchase Price.  The Purchase Price is hereby
reduced  to  $34,750,259.34,  of  which  $3,914,964.14  is the Cash  Amount  and
$30,835,295.20  is the Note Amount.  Schedule 4(a) to the Purchase  Agreement is
hereby deleted in its entirety and replaced by the Schedule 4(a) attached hereto
as Exhibit A.


                  4. Delivery of Replacement Promissory Note.  Contemporaneously
with the  execution  and  delivery  of this  Agreement,  TAS V will  execute and
deliver a  Promissory  Note to PAIF V in the form  attached  hereto as Exhibit B
(the  "Replacement  Note") in substitution for and replacement of the Promissory
Note  delivered to PAIF V in connection  with the first  Effective Time to occur
under the Purchase Agreement. The parties further acknowledge and agree that all
references to the Promissory Note in the Purchase  Agreement or any of the other
Ancillary  Agreements to which they are a party shall be deemed to be references
to the Replacement Note, the Replacement Note shall be deemed to be an Ancillary
Agreement and the  Promissory  Note shall be deemed null and void ab initio upon
delivery of the Replacement Note.


                  5. Return  of   Pro   Rata  Cash   Amount  and  Note   Income;
Distribution of Excess Cash. Pursuant to Section 4(a) of the Purchase Agreement,
TAS V has caused $5,203,540 to be deposited into the Cash Account, $1,288,575.86
of which is  attributable  to the  Receivable.  Pursuant to Section  4(b) of the
Purchase  Agreement,  PAIF V has caused $95,314.51 to be transferred to TAS V in
respect of Income on the Receivable since April 1, 1997. Upon the later to occur
of (i) the  withdrawal  of the Cash Amount from the Cash  Account in  accordance
with Section 4(c) of the Purchase  Agreement or (ii) the  execution and delivery
of this Agreement,  PAIF V will cause  $1,288,575.86 to be returned to TAS V and
TAS V will cause $95,314.51 to be returned to PAIF V.  Notwithstanding  anything
to the contrary in the Replacement Note or any other Ancillary Agreement,  TAS V
shall have the right to distribute  to its members,  and such members shall have
the right to retain free of any security  interest of PAIF V, an amount equal to
$1,288,575.86  in excess of all other  amounts  TAS V is  otherwise  entitled to
distribute to its members under the Replacement Note.

                  6. Reference  to and Effect on the Purchase  Agreement and the
Ancillary Agreements

                  (a) Upon the  effectiveness of this Agreement,  from and after
the date hereof,  each reference in the Purchase  Agreement to "this Agreement",








                                        2









"hereunder",  "hereof"  or  words  of  like  import  referring  to the  Purchase
Agreement and each reference in any of the Ancillary Agreements to "the Purchase
Agreement",  "thereunder",  "thereof"  or words of like import  referring to the
Purchase  Agreement,  shall mean and be a reference to the Purchase Agreement as
modified  hereby and each  reference in any of the Ancillary  Agreements to "the
Promissory  Note", "the Note",  "thereunder",  "thereof" or words of like import
referring  to  the  Promissory  Note,  shall  mean  and  be a  reference  to the
Replacement Note.

                  (b) Except as  specifically  modified by this  Agreement,  the
Purchase  Agreement,  and all of the Ancillary  Agreements  (including,  without
limitation, the Replacement Note) are and shall continue to be in full force and
effect, are hereby ratified and confirmed in all respects and are enforceable in
accordance  with their  respective  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 any such  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).  Without  limiting  the  generality  of the  foregoing,  to the  extent
provided  therein,  the  Security  Agreement  and all of the Pledged  Collateral
described  therein do and shall  continue  to secure the  payment of all Secured
Obligations under the Security Agreement.

         7. Reduction  of Keep  Well  Amount.  Section  1(b) of  the  Keep  Well
Agreement,  dated April 1, 1997,  among  Triton  Aviation  Services  Limited,  a
Bermuda corporation,  TAS V and PAIF V is hereby amended to delete the amount of
$4,034,060  and  insert in its place the  amount of  $3,035,088.  In  connection
therewith,  PAIF V and TAS V hereby authorize and instruct Weil Gotshal & Manges
LLP to substitute the page of the Keep Well Agreement  delivered on May 28, 1997
with a new page reflecting such amendment.

         8. Consent of Additional  Parties.  By their  execution and delivery of
this  Agreement,  each of Triton  Aviation  Services  Limited (in its individual
capacity) and Triton Investments Limited hereby consents to all of the terms and
provisions of this  Agreement  and ratifies and confirms that the Keepwell,  the
Keepwell Guaranty,  the Loan Guaranty and each of the other Ancillary  Agreement
to which  they are a party all  remain in full and  effect  and  enforceable  in
accordance  with their  respective  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 any such  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).








                                        3










         9. 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 PAIF V, to:

                           c/o Polaris Investment Management Corporation
                           201 Mission Street, 27th Floor
                           San Francisco, CA  94105
                           Attention:  President
                           Facsimile Number:  (415) 284-7460

                  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 PAIF V shall from time to time  designate in writing
to TAS V; and

                  If to TAS V, to:

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










                                        4









or to such other address as TAS V may from time to time  designate in writing to
PAIF V.


         10.      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.


         11.      Miscellaneous.

                           (a) 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.

                           (b) No amendment,  modification,  waiver, termination
or  discharge  of any  provision  of  this  Agreement,  nor any  consent  to any
departure by PAIF V or TAS V from any  provision  hereof,  shall in any event be
effective  unless the same  shall be in writing  and signed by PAIF V and TAS V,
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 PAIF V and TAS V.

                           (c) This  Agreement  and any  amendments,  waivers or
consents hereto may be executed by PAIF V and TAS V 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.










                                        5









                           (d) This  Agreement,  the Purchase  Agreement and the
Ancillary  Agreements  constitute the entire  agreement of PAIF V and TAS V with
respect to the subject matter hereof or thereof, and all prior understandings or
agreements,  whether  written or oral,  between PAIF V and TAS V with respect to
such subject matter are hereby superseded in their entirety.









                                        6









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


                                 POLARIS AIRCRAFT INCOME FUND V

                                 By:  Polaris Investment Management Corporation,
                                      General Partner


                                 By:     /s/ Eric M. Dull
                                    --------------------------------------------
                                 Name:       Eric M. Dull
                                      ------------------------------------------
                                 Title:      Executive Vice President
                                       -----------------------------------------



                                 TRITON AVIATION SERVICES V LLC

                                 By: Triton Aviation Services Limited,
                                     Manager


                                     By:      /s/ John E. Flynn
                                        ----------------------------------------
                                     Name:        John E. Flynn
                                          --------------------------------------
                                     Title:       President
                                           -------------------------------------



Consented and Agreed to
this ___ day of June, 1997




TRITON AVIATION SERVICES LIMITED


By:   /s/  John E. Flynn
   -----------------------------
Title:     President










                                        7









TRITON INVESTMENTS LIMITED


By:/s/ Steven C. Wight
   ---------------------------
Title:











                                        8









                                                                       EXHIBIT A


                                  SCHEDULE 4(a)

                                 PURCHASE PRICE



                                      Purchase          Note           Cash
   Transferred Interests               Price           Amount         Amount
                          ---
Transferred Interest 21345   |
Transferred Interest 21601   |
Transferred Interest 19733   |
Transferred Interest 20925   |
Transferred Interest 21117   |
Transferred Interest 21447   |
Transferred Interest 21448   |---  $34,750,259.34  $30,835,295.20  $3,914,964.14
Transferred Interest 21533   |     --------------  --------------  -------------
Transferred Interest 21534   |
Transferred Interest 21999   |
Transferred Interest 23014   |
Transferred Interest 22162   |
                          ---














                                        9









                                                                       EXHIBIT B



                           REPLACEMENT PROMISSORY NOTE











                                       10