AMENDMENT NO. 6
                                       TO
                                CREDIT AGREEMENT

     Amendment No. 6, dated May 4, 1998, (the "AMENDMENT") to Credit 
Agreement, dated June 12, 1997 as amended prior to this date, (the 
"AGREEMENT") by and between WILLIS LEASE FINANCE CORPORATION, a California 
corporation ("WILLIS") and CORESTATES BANK, N.A., a national banking 
association ("CORESTATES BANK", "CORESTATES" or the "BANK").  All capitalized 
terms used herein and not otherwise defined shall have the respective 
meanings ascribed to them in the Agreement.


                             PRELIMINARY STATEMENT


     WHEREAS, Willis has requested that CoreStates Bank agree to certain 
modifications to the Agreement as set forth herein.

     WHEREAS, CoreStates Bank is willing to agree to such request on the 
terms and conditions set forth herein.

     NOW, THEREFORE, in consideration of the premises and promises 
hereinafter set forth and intending to be legally bound hereby, the parties 
hereto agree as follows:


     1. SECTION 1.1 OF THE AGREEMENT.

     (a)  The following definitions are hereby inserted and shall read as 
follows:

          "ADJUSTED LIBO RATE" shall mean, for any Interest Period, the rate 
     per annum (rounded upwards, if necessary to the next 1/16 of 1%) 
     determined pursuant to the following formula:

          Adjusted LIBO Rate   =            LIBO Rate
                                      ---------------------
                                      1 -Reserve Percentage


          "BASE RATE LOAN" shall mean a Loan, or any portion thereof, made at
     the Base Rate pursuant to a request for advance made under Section 2.4
     herein or as otherwise provided in Section 2.5(b)(i) or in any other
     provision hereof or in any other Loan Document.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998



          "BASE RATE MARGIN" shall mean the percentage listed in the following
table:

          LEVERAGE RATIO*                    BASE RATE MARGIN1 (*)


          Less than ______                                            ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________
          _________________________

          1 In the event that the Revolver Termination Date is not extended and
            the Note is to be repaid as described in Section 2.1, the Base Rate
            Margin shall be increased by _____%.*


          "INTEREST PERIOD" shall mean a period commencing on the date of a 
     LIBO Rate Loan or with respect to a Loan being renewed, the last day of 
     the next preceding Interest Period and ending one, two or three months 
     thereafter, as requested by Willis at the time of its Request for Advance; 
     provided also that (i) an Interest Period which would otherwise expire on 
     a day which is not a London Business Day shall be extended to the next 
     succeeding London Business Day unless such London Business Day falls in 
     another calendar month, in which case such Interest Period shall end on 
     the next preceding London Business Day, (ii) any Interest Period which 
     begins on the last London Business Day of a calendar month (or on a day 
     for which there is no numerically corresponding day in the calendar month 
     at the end of such Interest Period) shall, subject to the next succeeding 
     clause, end on the last London Business Day of a calendar month; and (iii) 
     no Interest Period shall end later than the Revolver Termination Date.

          "LEVERAGE RATIO" shall mean the ratio of the Debt of Willis to its
     Tangible Net Worth calculated based on the most recent financial statements
     furnished to the Bank in accordance herewith.

          "LIBO RATE" shall mean the arithmetic average of the rates of interest
     per annum (rounded upwards, if necessary to the next 1/16 of 1%) at which
     the Bank is offered deposits of United States Dollars by leading banks in
     the interbank eurodollar or eurocurrency market on or about eleven o'clock
     (11:00) a.m. London time two London Business Days prior to the commencement
     of the requested Interest Period in an amount substantially equal to the
     outstanding principal amount of the LIBO Rate Loan requested for a maturity
     of comparable duration to the Interest Period.

          "LIBO RATE LOAN" shall mean a Loan made at Adjusted LIBO Rate plus the
     LIBO Rate Margin, pursuant to a request for advance made under Section 2.4
     herein.


_________________________
 * This redacted material has been omitted pursuant to a request for 
   confidential treatment and the material has been filed separately.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      2



          "LIBO RATE MARGIN" shall mean the percentage listed in the following
     table.

          LEVERAGE RATIO*                         LIBO RATE MARGIN1 (*)

          Less than ______                                            ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________
          Equal to or greater than ______ but less than  ______       ________

          _________________________
          1 In the event that the Revolver Termination Date is not extended 
            and the Note is to be repaid as described in Section 2.1, the LIBO 
            Rate Margin shall be increased by ____% during the repayment 
            period.*


          "LONDON BUSINESS DAY" shall mean any Business Day on which the Bank 
     is open for business and quoting interest rates on United States Dollar 
     deposits in London, England.

          "OPERATING LEASE" shall mean, with respect to any Person, the
     aggregate amount which, in accordance with GAAP, is not required to be
     reported as a liability on the balance sheet of such Person at such time in
     respect of such Person's interest as lessee under an Operating Lease. 

          "RESERVE PERCENTAGE" shall mean, for any LIBO Rate Loan for any
     Interest Period, the daily average of the stated maximum rate (expressed as
     a decimal) at which reserves (including any marginal, supplemental, or
     emergency reserves) are required to be maintained during such Interest
     Period under Regulation D by the Bank against "Eurocurrency liabilities"
     (as such term is used in Regulation D) but without benefit of credit
     proration, exemptions, or offsets that might otherwise be available to the
     Bank from time to time under Regulation D.  Without limiting the effect of
     the foregoing, the Reserve Percentage shall reflect any other reserves
     required to be maintained by the Bank against (1) any category of
     liabilities which includes deposits by reference to which the rate for LIBO
     Rate Loans is to be determined; or (2) any category of extension of credit
     or other assets which include LIBO Rate Loans.  The Adjusted LIBO Rate
     shall be adjusted on and as of the effective day of any change in the
     Reserve Percentage.

          "UNRESTRICTED SUBSIDIARY" shall mean WLFC Funding Corporation, T-5,
     Inc., T-7, Inc., T-10, Inc., T-12, Inc. and any additional subsidiary named
     by Willis after the date hereof with the written consent of the Bank.


_________________________
 * This redacted material has been omitted pursuant to a request for 
   confidential treatment and the material has been filed separately.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      3



     (b)  The following definitions are hereby amended and restated in their 
entirety to read as follows:

          "BASE RATE" shall mean (i) the rate of interest for commercial loans
     established and publicly announced by CoreStates from time to time as its
     prime rate, or, if higher, (ii) the Federal Funds Rate plus ______% per
     annum.  Any change in such interest rate due to a change in the Base Rate
     shall be effective on the date of such change.(*)

          "DEBT" shall mean, as of any date of determination with respect to
     Willis, without duplication and determined on a consolidated basis, (i) all
     items which in accordance with GAAP would be included in determining total
     liabilities as shown on the liability side of a balance sheet of Willis as
     of the date on which Debt is to be determined, (ii) all indebtedness of
     others with respect to which Willis has become liable by way of a guarantee
     or endorsement (other than for collection or deposit in the ordinary course
     of business), (iii) all contingent liabilities of Willis, (iv) lease
     obligations that, in conformity with GAAP, have been capitalized on Willis'
     balance sheet, and (v) the present value of any outstanding  Operating
     Lease payments (discounted at a rate of 10%), LESS (1) maintenance reserves
     and security deposits that are cash backed, and (2) liabilities of
     Unrestricted Subsidiaries.

          "DEFAULT RATE" on any Loan shall mean two percent (2.0%) per annum
     above the rate then applicable to each Loan or portion thereof.

          "LOAN" or "LOANS" shall mean LIBO Rate or Base Rate Revolving Credit
          Loan or Loans.

          "NET WORTH" shall mean the sum of capital stock, plus paid-in capital,
     plus retained earnings, minus treasury stock and minus the net worth of any
     Unrestricted Subsidiaries.

     2. SECTION 2.1 OF THE AGREEMENT.  The second paragraph of Section 2.1 of
the Agreement is hereby amended and restated in its entirety to read as follows:

          "Revolving Credit Loans may be made from time to time during the
     period beginning on the date hereof and ending on June 30, 1998 or on
     the earlier date of termination in full, pursuant to Section 2.7 or
     Section 8.1 hereof, of the obligations of the Bank under this Section
     2.1 (June 30, 1998 or such earlier date of termination being herein
     called the "REVOLVER TERMINATION DATE").  Revolving Credit Loans shall
     bear interest at (i) the Base Rate plus the Base Rate Margin, (ii)
     Adjusted LIBO Rate plus the LIBO Rate Margin or (iii) some combination
     of the foregoing, as requested by Willis, subject to the terms and
     conditions hereof including the requirements concerning minimum Loan
     requests and the requirements that (i) no request may be made which
     would require more than one interest rate option or more than one
     Interest Period to apply to Loans made on any single date, and (ii),
     in the case of LIBO Rate Loans, (a) not more than


_________________________
 * This redacted material has been omitted pursuant to a request for
   confidential treatment and the material has been filed separately.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      4



     five such Loans may be outstanding at any one time, and (b) no LIBO Rate
     Loan may have an Interest Period extending beyond the Revolver Termination
     Date.  Revolving Credit Loans at the occasion of each borrowing (and each
     conversion of LIBO Rate Loans into Base Rate Loans) shall be in aggregate
     principal amounts at least equal to $150,000 or, if less, the remaining
     unused amount of the Revolving Loan Commitment.  Each LIBO Rate Loan when
     made (and each conversion of Base Rate Loans into LIBO Rate Loans) shall be
     in an amount at least equal to $3,000,000 or, if greater, then in such
     minimum amount plus $100,000 multiples.  Willis shall not be entitled to
     any Revolving Credit Loan if, after giving effect to such Loan, the unpaid
     amount of the then outstanding Revolving Credit Loans would exceed the then
     current Borrowing Base.  Prior to the Revolver Termination Date and within
     the limits of the Revolving Loan Commitment and the Borrowing Base, Willis
     may borrow, prepay and reborrow Revolving Credit Loans.  All Revolving
     Credit Loans shall mature and be due and payable as set forth in the next
     paragraph of this Section 2.1 unless the maturity of said Loans is
     accelerated as provided in Section 2.7 or Section 8.1 hereof."

     3. SECTION 2.4 OF THE AGREEMENT.  Section 2.4 of the Agreement is hereby
amended and restated in its entirety to read as follows:

     "2.4  FUNDING PROCEDURES.

          (a)  REQUESTS FOR ADVANCE.  Each request for a Loan shall be made not
     later than 2:00 p.m. on a Business Day by delivery to the Bank of a written
     request signed by Willis or in the alternative a telephone request followed
     promptly by written confirmation of the request.  No request shall be
     effective until actually received in writing by the Bank.  Willis may not
     request more than three advances per week.

          A request for Revolving Credit Loans or a conversion or renewal shall
     be delivered to the Bank (A) at least one Business Day, in the case of Base
     Rate Loans and (B) three London Business Days, in the case of LIBO Rate
     Loans, prior to the date on which such Loan is desired.  The request shall
     state (i) the date of such Borrowing, conversion or renewal, which shall be
     a Business Day or, in the case of LIBO Rate Loans, a London Business Day,
     (ii) the amount of such Borrowing, conversion or renewal, (iii) whether the
     Loans comprising such Borrowing are to be Base Rate Loans or LIBO Rate
     Loans and (iv) in the case of LIBO Rate Loans, the duration of the Interest
     Period applicable thereto.  Each request for advance shall be for Loans at
     a single interest rate option.

          (b)  IRREVOCABILITY.  Upon receipt of a request for a Loan and if the
     conditions precedent provided herein shall be satisfied at the time of such
     request, the request for a Loan shall not be revocable by Willis.

          (c)  AVAILABILITY OF FUNDS.  In the case of a borrowing, the Bank will
     make funds immediately available to Willis on the date of each Loan by a
     credit to the account of Willis at the Bank's address set forth opposite
     its name on the signature page hereof."


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      5



     4. SECTION 2.5 OF THE AGREEMENT.  Section 2.5 of the Agreement is hereby
amended and restated in its entirety to read as follows:

     "2.5 INTEREST RATES.

          (a)  BASE RATE LOANS.  Each Base Rate Loan shall bear interest on the
     unpaid principal balance thereof from day to day at a rate per annum which
     at all times shall be equal to the Base Rate plus the Base Rate Margin. 
     Interest on Loans shall be computed on the basis of a year of 365 or 366
     days, as applicable, if the Base Rate is equal to the prime rate of
     CoreStates.  Interest on Loans shall be computed on the basis of a year of
     360 days, for the actual days elapsed, if the Base Rate is equal to the
     Federal Funds Rate plus ______ annum.(*)

          (b)  LIBO RATE LOANS.   Each LIBO Rate Loan shall bear interest from
     its effective date on the unpaid principal amount thereof at Adjusted LIBO
     Rate plus the LIBO Rate Margin.  Interest on LIBO Rate Loans shall be
     computed on the basis of a year of 360 days, for the actual days elapsed,
     and shall be payable on the last day of the applicable Interest Period. 

          (c)  CONVERSION TO BASE RATE.  Unless Willis shall have elected in
     accordance with the provisions of Section 2.4 or this Section 2.5 that LIBO
     Rate apply to the one, two or three month period immediately succeeding a
     particular Interest Period, upon the termination of such Interest Period
     the applicable Loan shall bear interest at the Base Rate plus the Base Rate
     Margin until such time as Willis elects to request a new LIBO Rate Loan for
     a subsequent Interest Period.

          (d)  RENEWALS AND CONVERSIONS.  Willis shall have the right to convert
     Base Rate Loans into LIBO Rate Loans, and vice versa, and to renew LIBO
     Rate Loans from time to time, provided that:  (i) Willis shall give Bank
     notice of each permitted conversion or renewal; (ii) LIBO Rate Loans may be
     converted or renewed only as of the last day of the applicable Interest
     Period for such Loans; (iii) without the consent of the Bank, no Base Rate
     Loan may be converted into a LIBO Rate Loan, and no Interest Period may be
     renewed if on the proposed date of conversion an Event of Default, or
     Potential Default exists or would thereby occur.  The Bank shall use its
     best efforts to notify Willis of the effectiveness of such conversion or
     renewal, and the new interest rate to which the converted or renewed Loan
     is subject, as soon as practicable after the conversion; provided, however,
     that any failure to give such notice shall not affect Willis' obligations
     or the Bank's rights and remedies hereunder in any way whatsoever.

          (e)  INTERIM PAYMENTS AT BASE RATE.  If at any time Willis requests
     that Adjusted LIBO Rate plus the LIBO Rate Margin be applicable to a Loan
     for a particular Interest Period and a payment of principal is due within
     such period (other than on the last day of such Interest Period), only that
     portion of that Loan equal to the outstanding principal amount of the Loan
     less the principal installment due during such period shall bear interest
     at Adjusted LIBO Rate


_________________________
 * This redacted material has been omitted pursuant to a request for
   confidential treatment and the material has been filed separately.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      6



     plus the LIBO Rate Margin for such Interest Period.  The portion of that 
     Loan equal to the principal installment due during such period shall bear 
     interest at the Base Rate plus the Base Rate Margin."

     5. SECTION 2.8 OF THE AGREEMENT.  Section 2.8 of the Agreement is hereby
amended and restated in its entirety to read as follows:

     "2.8 VOLUNTARY PREPAYMENTS.

          (a)  BASE RATE LOANS.  On one Business Day's notice to the Bank,
     Willis may, without penalty, at its option, prepay any Base Rate Loan in
     whole at any time or in part from time to time, provided that each partial
     prepayment shall be in the minimum principal amount of $150,000 or, if
     greater, then in multiples thereof and, if less than $150,000 shall be
     outstanding, in principal amount equal to amount remaining outstanding.
     Notwithstanding the foregoing, prepayments may be made in connection with
     the release of collateral as provided in Section 9.3, which prepayments
     shall not be subject to the requirements of the previous sentence.

          (b)  LIBO RATE LOANS.  On three London Business Days' notice to the
     Bank, Willis may, without penalty, at its option, prepay any LIBO Rate Loan
     in whole at any time or in part from time to time, provided that each
     partial prepayment shall be in the minimum principal amount of $1,000,000
     or, if greater, then in multiples of $100,000 and, if less than $1,000,000
     shall be outstanding, in principal amount equal to amount remaining
     outstanding provided that if it shall prepay a LIBO Rate Loan prior to the
     last day of the applicable Interest Period, or shall fail to borrow any
     LIBO Rate Loan on the date such Loan is to be made, it shall pay to the
     Bank, in addition to the principal and interest then to be paid in the case
     of a prepayment, on such date of prepayment, the Additional Amount incurred
     or sustained by the Bank as a result of such prepayment or failure to
     borrow as provided in Section 2.9(e)."

     6. SECTION 2.9 OF THE AGREEMENT.  Section 2.9 of the Agreement is hereby
amended and restated in its entirety to read as follows:

     "SECTION 2.9. PAYMENTS.

          (a)  ACCRUED INTEREST.  Accrued interest on all Base Rate Loans shall
     be due and payable on the first Business Day of each calendar month. 
     Interest on LIBO Rate Loans shall be payable on the last day of the
     applicable Interest Period.  Each Revolving Credit Loan shall mature as
     provided in Section 2.1.

          (b)  FORM OF PAYMENTS, APPLICATION OF PAYMENTS, PAYMENT
     ADMINISTRATION, ETC.  All payments of principal, interest, fees, or other
     amounts payable by Willis hereunder shall be applied to the Loans in such
     order and to such extent as shall be specified by Willis by written notice
     to the Bank at the time of such payment or prepayment.  Such payments shall
     be remitted to the Bank at the address set forth opposite its name on the
     signature page hereof or at such office or account as the Bank shall
     specify to Willis, in immediately available funds not later than 2:00 p.m.
     on the day when due.  Whenever any payment is stated as due on a day which
     is not a Business Day, the maturity of such payment shall, except as
     otherwise provided in the definition of "Interest Period," be extended to
     the next succeeding Business Day and interest and commitment fees shall
     continue to accrue during such extension.  Willis authorizes the Bank to
     deduct from any account of Willis maintained at the Bank or over which the
     Bank


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      7



     has control any amount payable under this Agreement, the Note or any
     other Loan Document which is not paid in a timely manner.  The Bank's
     failure to deliver any bill, statement or invoice with respect to amounts
     due under this Section or under any Loan Document shall not affect Willis's
     obligation to pay any installment of principal, interest or any other
     amount under this Agreement when due and payable.

          (c)  DEMAND DEPOSIT ACCOUNT.  Willis shall maintain at least one
     demand deposit account with the Bank for purposes of this Agreement. 
     Willis authorizes the Bank to deposit into said account all amounts to be
     advanced to Willis hereunder.  Further, Willis authorizes the Bank (but the
     Bank shall not be obligated) to deduct from said account, or any other
     account maintained by Willis at the Bank, any amount payable hereunder on
     or after the date upon which it is due and payable.  Such authorization
     shall include but not be limited to amounts payable with respect to
     principal, interest, fees and expenses.

          (d)  NET PAYMENTS.  All payments made to the Bank by Willis hereunder,
     under any Note or under any other Loan Document will be made without set
     off, counterclaim or other defense. 

          (e)  PAYMENT OF ADDITIONAL AMOUNT.  If any principal of a LIBO Rate
     Loan shall be repaid (whether upon prepayment, reduction of the Revolving
     Loan Commitment after acceleration or for any other reason) or converted to
     a Base Rate Loan prior to the last day of the Interest Period applicable to
     such LIBO Rate Loan or if Willis fails for any reason to borrow a LIBO Rate
     Loan after giving irrevocable notice pursuant to Section 2.4, it shall pay
     to the Bank, in addition to the principal and interest then to be paid,
     such additional amounts as may be necessary to compensate the Bank for all
     direct and indirect costs and losses (including losses resulting from
     redeployment of prepaid or unborrowed funds at rates lower than the cost of
     such funds to the Bank, and including lost profits incurred or sustained by
     the Bank) as a result of such repayment or failure to borrow (the
     "Additional Amount").  The Additional Amount (which the Bank shall take
     reasonable measures to minimize) shall be specified in a written notice or
     certificate delivered to Willis by the Bank in the form provided by the
     Bank sustaining such costs or losses.  Such notice or certificate shall
     contain a calculation in reasonable detail of the Additional Amount to be
     compensated and shall be conclusive as to the facts and the amounts stated
     therein, absent manifest error."

     7. SECTION 2.10 OF THE AGREEMENT.  Section 2.10 of the Agreement is hereby
inserted to read as follows:

     "SECTION 2.10. CHANGE IN CIRCUMSTANCES, YIELD PROTECTION.

          (a)  CERTAIN REGULATORY CHANGES.  If any Regulatory Change or
     compliance by the Bank with any request made after the date of this
     Agreement by the Board of Governors of the Federal Reserve System or by any
     Federal Reserve Bank or other central bank or fiscal, monetary or similar
     authority (in each case whether or not having the force of law) shall (i)
     impose, modify or make applicable any reserve, special deposit, Federal
     Deposit Insurance Corporation premium or similar requirement or imposition
     against assets held by, or deposits in or for the account of, or loans made
     by, or any other acquisition of funds for loans or advances by, the Bank;
     (ii) impose on the Bank any other condition regarding the Notes; (iii)
     subject the Bank to, or cause the withdrawal or termination of any
     previously granted exemption with respect to, any tax (including any
     withholding tax but not including any income


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      8



     tax not currently causing the Bank to be subject to withholding) or any 
     other levy, impost, duty, charge, fee or deduction on or from any 
     payments due from Willis; or (iv) change the basis of taxation of 
     payments from Willis to the Bank (other than by reason of a change in 
     the method of taxation of the Bank's net income); and the result of any 
     of the foregoing events is to increase the cost to the Bank of making or 
     maintaining any Loan or to reduce the amount of principal, interest or 
     fees to be received by Willis hereunder in respect of any Loan, the Bank 
     will immediately so notify Willis.  If the Bank determines in good faith 
     that the effects of the change resulting in such increased cost or 
     reduced amount cannot reasonably be avoided or the cost thereof 
     mitigated, then upon notice by the Bank to Willis, Willis shall pay to 
     the Bank on each interest payment date of the Loan, such additional 
     amount as shall be necessary to compensate the Bank for such increased 
     cost or reduced amount.

           (b) CAPITAL ADEQUACY.  If the Bank shall determine that any
     Regulation regarding capital adequacy or the adoption of any Regulation
     regarding capital adequacy, which Regulation is applicable to Banks (or
     their holding companies) generally and not such Bank (or its holding
     company) specifically, or any change therein, or any change in the
     interpretation or administration thereof by any governmental authority,
     central bank or comparable agency charged with the interpretation or
     administration thereof, or compliance by the Bank (or its holding company)
     with any such request or directive regarding capital adequacy (whether or
     not having the force of law) of any such authority, central bank or
     comparable agency, has the effect of reducing the rate of return on the
     Bank's capital as a consequence of its obligations hereunder to a level
     below that which the Bank could have achieved but for such adoption, change
     or compliance (taking into consideration the Bank's policies with respect
     to capital adequacy) by an amount deemed by the Bank to be material, Willis
     shall promptly pay to the Bank for the account of the Bank, upon the demand
     of the Bank, such additional amount or amounts as will compensate the Bank
     for such reduction.

          (c)  ABILITY TO DETERMINE LIBO RATE. If the Bank shall determine
     (which determination will be, in the absence of fraud or manifest error,
     conclusive and binding upon all parties hereto) that by reason of abnormal
     circumstances affecting the interbank eurodollar or applicable eurocurrency
     market adequate and reasonable means do not exist for ascertaining LIBO
     Rate to be applicable to the requested LIBO Rate Loan or that eurodollar or
     eurocurrency funds in amounts sufficient to fund all the LIBO Rate Loans
     are not obtainable on reasonable terms, the Bank shall give notice of such
     inability or determination by telephone to Willis at least two Business
     Days prior to the date of the proposed Loan and thereupon the obligations
     of the Bank to make, convert other Loans to, or renew such LIBO Rate Loan
     shall be excused, subject, however, to the right of Willis at any time
     thereafter to submit another request.

          (d)  YIELD PROTECTION.  Determination by the Bank for purposes hereof
     of the effect of any Regulatory Change or other change or circumstance
     referred to above on its costs of making or maintaining Loans or on amounts
     receivable by it in respect of the Loans and of the additional amounts
     required to compensate the Bank in respect of any additional costs, shall
     be made in good faith and shall be evidenced by a certificate, signed by an
     officer of the Bank and delivered to Willis, as to the fact and amount of
     the increased cost incurred by or the reduced amount accruing to the Bank
     owing to such event or events.  Such certificate shall be prepared in
     reasonable detail and shall be conclusive as to the facts and amounts
     stated therein, absent manifest error.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      9



          (e)  NOTICE OF EVENTS.  The Bank will notify Willis of any event
     occurring after the date of this Agreement that will entitle the Bank to
     compensation pursuant to this Section as promptly as practicable after it
     obtains knowledge thereof and determines to request such compensation. 
     Said notice shall be in writing, shall specify the applicable Section or
     Sections of this Agreement to which it relates and shall set forth the
     amount or amounts then payable pursuant to this Section.  Willis shall pay
     the Bank the amount shown as due on such notice within 10 days after its
     receipt of the same."

     8. SECTION 2.11 OF THE AGREEMENT.  Section 2.11 of the Agreement is hereby
inserted to read as follows:

     "SECTION 2.11.ILLEGALITY. Notwithstanding any other provision in this
     Agreement, if the adoption of any applicable Regulation, or any change
     therein, or any change in the interpretation or administration thereof by
     any governmental authority, central bank, or comparable agency charged with
     the interpretation or administration thereof, or compliance by the Bank
     with any request or directive (whether or not having the force of law) of
     any such authority, central bank, or comparable agency shall make it
     unlawful or impossible for the Bank to (1) maintain its Revolving Loan
     Commitment, then upon notice to Willis by the Bank, the Revolving Loan
     Commitment shall terminate; or (2) maintain or fund its LIBO Rate Loans,
     then upon notice to the Willis of such event, Willis' outstanding LIBO Rate
     Loans shall be converted into Base Rate Loans."

     9. REPRESENTATIONS AND WARRANTIES.  Willis hereby restates the
representations and warranties made in the Agreement, including but not limited
to Article 3 thereof, on and as of the date hereof as if originally given on
this date.

     10. COVENANTS.  Willis hereby represents and warrants that it is in
compliance and has complied with each and every covenant set forth in the
Agreement, including but not limited to Articles 5 and 6 thereof, on and as of
the date hereof.

     11. CORPORATE AUTHORIZATION AND DELIVERY OF DOCUMENTS.  CoreStates shall
have received copies, certified as of the date hereof, of all action taken by
Willis and any other necessary Person to authorize this Amendment and such other
papers as CoreStates shall require.

     12. AFFIRMATION.  Willis hereby affirms its absolute and unconditional
promise to pay to CoreStates Bank the Loans and all other amounts due under the
Agreement and any other Loan Document on the maturity date(s) provided in the
Agreement or any other Loan Document, as such documents may be amended hereby.

     13. EFFECT OF AMENDMENT.  This Amendment amends the Agreement only to the
extent and in the manner herein set forth, and in all other respects the
Agreement is ratified and confirmed.

     14. COUNTERPARTS.  This Amendment may be signed in any number of
counterparts, each of which shall be an original, with the same effect as if the
signatures hereto were upon the same instrument.


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      10



     IN WITNESS WHEREOF, the parties hereto have each caused this Amendment to
be duly executed by their duly authorized representatives as of the date first
above written.


                                   WILLIS LEASE FINANCE CORPORATION


                                   By:  /s/ James D. McBride
                                        ----------------------------------
                                        Name:  James D. McBride
                                        Title: Executive Vice President
                                               and Chief Financial Officer

                                   CORESTATES BANK, N.A.


                                   By:  /s/ Hugh W. Connelly
                                        ----------------------------------
                                        Name:  Hugh W. Connelly
                                        Title: Vice President


Amendment No. 6 to
Credit Agreement                                                     May 4, 1998

                                      11