Document:

EXHIBIT 10.59

                           AMENDMENT NO. 5 AND WAIVER

                           Dated as of April 17, 2001

                                       to

                  FOURTH AMENDED AND RESTATED CREDIT AGREEMENT

                            Dated as of May 31, 2000

         This Amendment No. 5 and Waiver (the "Amendment") dated as of April 17,
2001 is entered into among AVIATION SALES DISTRIBUTION SERVICES COMPANY, a
Delaware corporation ("Distribution"), AEROCELL STRUCTURES, INC., an Arkansas
corporation ("Aerocell"), AVS/M-2, INC. (formerly known as AVS/Kratz-Wilde
Machine Company), a Delaware corporation ("Kratz-Wilde"), WHITEHALL CORPORATION,
a Delaware corporation ("Whitehall"), TRIAD INTERNATIONAL MAINTENANCE
CORPORATION, a Delaware corporation ("TIMCO"), AVS/M-3, INC. (formerly Apex
Manufacturing, Inc.), an Arizona corporation ("Apex"), CARIBE AVIATION, INC., a
Florida corporation ("Caribe"), AIRCRAFT INTERIOR DESIGN, INC., a Florida
corporation ("Design"), AVIATION SALES LEASING COMPANY, a Delaware corporation
("Leasing"), and TIMCO ENGINE CENTER, INC., a Delaware corporation ("TIMCO
Engine") (Distribution, Aerocell, Kratz-Wilde, Whitehall, TIMCO, Apex, Caribe,
Design, Leasing, and TIMCO Engine being collectively referred to as the
"Borrowers"), and AVIATION SALES COMPANY, a Delaware corporation ("Parent"),
AERO HUSHKIT CORPORATION, a Delaware corporation ("Hushkit"), AVIATION SALES
PROPERTY MANAGEMENT CORP., a Delaware corporation ("Property Management"),
AVIATION SALES SPS I, INC., a Delaware corporation ("SPS I"), AVS/M-1, INC.
(formerly Aviation Sales Manufacturing Company), a Delaware corporation
("Manufacturing"), AVSRE, L.P., a Delaware limited partnership ("AVSRE"),
AVIATION SALES FINANCE COMPANY, a Delaware corporation ("Finance"),
HYDROSCIENCE, INC., a Texas corporation ("Hydroscience"), AVIATION SALES
MAINTENANCE, REPAIR & OVERHAUL, INC., a Delaware corporation ("MR&O") and TIMCO
ENGINEERED SYSTEMS, INC., a Delaware corporation ("Engineered Systems") (Parent,
Hushkit, Property Management, SPS I, Manufacturing, AVSRE, Finance,
Hydroscience, MR&O and Engineered Systems being collectively referred to as the
"Guarantors"), and the "Lenders" (as defined in the Credit Agreement identified
below) a party hereto. Capitalized terms used herein without definition are used
herein as defined in the Credit Agreement.

                             PRELIMINARY STATEMENT:

         WHEREAS, Borrowers, Parent, Citicorp USA, Inc., as Agent, and certain
financial institutions, as Lenders and Issuing Banks, are parties to that
certain Fourth Amended and Restated Credit Agreement dated as of May 31, 2000,
as heretofore amended (the "Credit Agreement");

<PAGE>

         WHEREAS, the Borrowers have requested an amendment of the definition of
the term "Tangible Net Worth" included in the Credit Agreement to accommodate
certain non-cash reserves for the balance of the fiscal year ending December 31,
2000, certain modifications of the requirements for applications of Net Cash
Proceeds of Sale, and a waiver of rights and remedies of the Lenders with
respect to a certain Event of Default, and the Lenders have agreed to the same
on the terms and conditions set forth herein;

         NOW, THEREFORE, the parties hereto hereby agree as follows:

         SECTION 1. Amendments to the Credit Agreement.

         Effective as of April 17, 2001, subject to the satisfaction of the
conditions precedent set forth in Section 3 hereof the Credit Agreement is
hereby amended as follows:

         1.1 Section 1.01 is amended to (i) delete the definition of "Tangible
Net Worth" therein and substitute the following therefor:

         "Tangible Net Worth" means the amount calculated as (i) the
consolidated net worth of the Parent and its Subsidiaries minus (ii) the
consolidated intangibles of the Parent and its Subsidiaries including, without
limitation, goodwill, trademarks, tradenames, copyrights, patents, patent
applications, licenses and rights in any thereof and other items treated as
intangibles in accordance with GAAP plus (iii) the amount of non-cash reserves
with respect to the TNW Adjustments, in each instance, as included on the
balance sheet of the Parent and its Subsidiaries in accordance with GAAP and
which non-cash reserves, in the aggregate, shall not exceed $47,741,000 plus
(iv) no more than $161,000 per month of non-cash reserves with respect to
unaccrued interest income with respect to the KAV Senior Subordinated Notes, as
included on the balance sheet of the Parent and its Subsidiaries in accordance
with GAAP.

and (ii) add the following defined terms:

         "Designated Asset Sales" means the sale of any or all of the assets and
         Capital Stock identified on Schedule 1.01.11 attached to this Agreement
         and made a part hereof.

         "TNW Adjustments" means those non-cash adjustments identified on
         Schedule 1.01.12 attached to this Agreement and made a part hereof.

         1.2 Section 4.01(b) is amended to add the following provision at the
end thereof as clause (ix):

         (ix) Notwithstanding anything to the contrary set forth in the
foregoing, (A) the Net Cash Proceeds of Sale received with respect to the
Designated Asset Sales shall be applied as follows: first to effect the
reduction of the Overadvance Amount to zero; second $10,000,000 to permanently
repay the Loans and, if the Loans are repaid in full, to the Letter of Credit
Obligations (or, to the extent such Letter of Credit Obligations are contingent,
deposited in the Cash Collateral Account to provide Cash Collateral in respect
of such Letter of Credit Obligations) and effect a concurrent reduction of the
Borrowing Base as is required by Section 4.01(b)(vii)(C)(1); third to make a
payment in the amount of $3,500,000 to the holder of the Supplemental Term Loan
Note for application on installments of the principal amount of

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<PAGE>

Indebtedness evidenced thereby in the order of maturity, which payment of
Indebtedness evidenced by the Supplemental Term Loan Note is hereby consented to
by the Lenders; and fourth for a deposit in the amount of up to $10,000,000 in
the Borrowers' depository accounts for use solely as working capital in the
ordinary course of their businesses and (B) the Revolving Credit Commitments
shall be permanently reduced by the amount of such Net Cash Proceeds of Sale
applied to permanent repayment of the Loans and Letter of Credit Obligations (or
deposited in the Cash Collateral Account as required by this clause (ix)). In
the event such Net Cash Proceeds of Sale received with respect to the Designated
Asset Sales exceed $25,849,000, the amount of such excess shall be applied to
permanently repay the Loans and, if the Loans are repaid in full, to the Letter
of Credit Obligations (or, to the extent such Letter of Credit Obligations are
contingent, deposited in the Cash Collateral Account to provide Cash Collateral
in respect of such Letter of Credit Obligations).

         1.3 Section 8.01(f) is amended to add the following provision as clause
(v) at the end thereof:

         (v) Updated Plan and Financial Forecast. By June 4, 2001, (A) an
updated plan and financial forecast consisting of a balance sheet, income
statement and statement of cash flows by month for the Fiscal Year ending
December 31, 2001 and (B) an updated plan and financial forecast for the Fiscal
Year ending December 31, 2002, including forecasted consolidated balance sheet,
income statement, and statement of cash flow for the Parent and its Subsidiaries
for such Fiscal Years.

         1.4 Schedules 1.01.11 and 1.01.12 attached hereto and made a part
hereof shall be added as Schedules to the Credit Agreement.

         SECTION 2. Consent to TROL Documents Amendment; Waiver.

         2.1 The Lenders signatory hereto hereby consent to the amendment of the
TROL Documents on the terms and conditions attached hereto as Exhibit A and made
a part hereof.

         2.2 The Lenders signatory hereto hereby waive, subject to the
conditions set forth in Section 3 hereof, all of their rights and remedies
arising under the Credit Agreement due to the Borrowers' failure to deliver to
the Agent and the Lenders, as required by Section 8.01(c)(ii) of the Credit
Agreement, a report on the consolidated Financial Statements of the Parent and
its Subsidiaries for the Fiscal year ended December 31, 2000, of their
independent certified public accountants, Arthur Andersen LLP, which is
unqualified as to the "going concern" status of the Parent and its Subsidiaries.

         SECTION 3. Conditions Precedent. This Amendment shall become effective,
if, and only if:

         3.1 The Agent shall have received on or before April 17, 2001:

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

                                       3
<PAGE>

         (a) a facsimile or original executed copy of this Amendment executed by
         the Parent, each Borrower, the Guarantors and the Requisite Lenders;

         (b) an opinion of counsel to the Borrowers and Parent with respect to
         non-contravention of the TROL Documents and agreements under which the
         Senior Subordinated Notes have been issued, this Amendment and the
         instruments and documents executed by the Borrowers and Guarantors in
         connection herewith;

         (c) corporate resolutions of the Parent, Borrowers and Guarantors
         authorizing the execution and delivery of this Amendment and all
         instruments and documents required to be executed and delivered in
         connection herewith;

         (d) reimbursement from the Borrowers for the expenses of the Agent
         identified on Exhibit B attached hereto and made a part hereof;

         (e) payment, for the account of each Lender executing and delivering
         this Amendment by April 13, 2001 as aforesaid, of a fee in the amount
         equal to one-eighth of one percent (1/8%) of such Lender's Revolving
         Credit Commitment as of the date this Amendment becomes effective; and

         (f) a facsimile or original executed copy of an agreement by the holder
         of the Supplemental Term Loan Note with respect to deferral of the
         principal installment payments thereunder due in 2001 in the form
         attached hereto as Exhibit C and made a part hereof; and

         3.2 The Agent shall have received,on or before April 19, 2001, a
written consent of the obligee parties to the TROL Documents to the terms of
this Amendment and an executed copy of the amendment to the TROL Documents, the
form of which is attached as Exhibit A; and

         3.3 After giving effect to this Amendment and any amendment of the TROL
Documents, as of April 19, 2001, no "Event of Default" shall have occurred and
be continuing under the terms of the Credit Agreement, TROL Documents, Indenture
under which the Senior Subordinated Notes have been issued, or BofA Note, in
each instance, as amended or supplemented through the date of this Amendment,
and no "Change of Control" (as defined in such Indenture) shall have occurred.

         SECTION 4. Representations and Warranties; Acknowledgment. The
Borrowers hereby represent and warrant as follows:

         4.1 This Amendment and the Credit Agreement as previously executed and
delivered and as amended hereby constitute legal, valid and binding obligations
of the Borrowers and are enforceable against the Borrowers in accordance with
their terms.

         4.2 After giving effect to this Amendment, no Event of Default or
Potential Event of Default exists or would result from any of the transactions
contemplated by this Amendment. No event of default or default has occurred and
is continuing under the terms of (a) any of the TROL Documents after giving
effect to the amendment to the TROL Documents in the form

                                       4
<PAGE>

attached hereto as Exhibit A, (b) under any of the agreements and documents
executed with respect to the Senior Subordinated Notes or under which the Senior
Subordinated Notes have been issued, or (c) under any of the agreements and
documents executed with respect to the BofA Note.

         4.3 Upon the effectiveness of this Amendment, Parent and each of the
Borrowers hereby reaffirm all covenants, representations and warranties made by
it, respectively, in the Credit Agreement to the extent the same are not amended
hereby and agree that all such covenants, representations and warranties shall
be deemed to have been remade as of the date this Amendment becomes effective
(unless a representation and warranty is stated to be given on and as of a
specific date, in which case such representation and warranty shall be true,
correct and complete as of such date).

         SECTION 5. Reference to and Effect on the Credit Agreement;
Reaffirmation.

         5.1 Upon the effectiveness of this Amendment, each reference in the
Credit Agreement to "this Agreement", "hereunder", "hereof", "herein" or words
of like import shall mean and be a reference to the Credit Agreement, as amended
hereby, each reference to the Credit Agreement in any other document, instrument
or agreement executed and/or delivered in connection with the Credit Agreement
shall mean and be a reference to the Credit Agreement as amended hereby.

         5.2 Except as specifically amended or agreed above, the Credit
Agreement, the Notes and all other Loan Documents shall remain in full force and
effect and are hereby ratified and confirmed.

         5.3 The execution, delivery and effectiveness of this Amendment shall
not operate as a waiver of any right, power or remedy of any Lender or Issuing
Bank or the Agent under the Credit Agreement, the Notes or any of the other Loan
Documents, nor constitute a waiver of any provision contained therein, except as
specifically set forth herein.

         5.4 Each of the Borrowers and Guarantors hereby (i) reaffirms all of
its obligations and liabilities under the respective security agreements, pledge
agreements and other Loan Documents, including, without limitation, the
Collateral Documents Amendment, pursuant to which any Lien against property and
interests in property of such Person has been granted, and the Release Agreement
dated as of February 14, 2001, which have been heretofore executed by such
Person in favor of the Agent for the benefit of the Holders (including, without
limitation, the holder of the Supplemental Term Loan Note) and (ii) acknowledges
and agrees that such security agreements, pledge agreements and other Loan
Documents remain in full force and effect, before and after giving effect to the
Amendment, for the benefit of the Agent and such other Holders, that the
security granted thereunder shall continue as security for the Obligations and
the Indebtedness evidenced by the Supplemental Term Loan Note, and that the
"Borrower Claims" described in such Release Agreement shall mean and extend to
the matters described therein whether existing, held or alleged heretofore or as
of the date of this Amendment, and which could, might or may be claimed to exist
through the date of this Amendment.

                                       5
<PAGE>

         5.5 Each of Parent and the other Guarantors agrees that it continues to
be liable, as a guarantor under the Loan Documents heretofore executed and
delivered thereby of the payment and performance of the Obligations and the
Indebtedness evidenced by the Supplemental Term Loan Note, whether incurred
prior to or after the effective date of the Amendment.

         SECTION 6. Execution in Counterparts. This Amendment may be executed in
any number of counterparts and by different parties hereto in separate
counterparts, each of which when so executed and delivered shall be deemed to be
an original and all of which taken together shall constitute but one and the
same instrument. Delivery of an executed counterpart of this Amendment by
telecopier shall be effective as delivery of a manually executed counterpart of
this Amendment.

         SECTION 7. Governing Law. This Amendment shall be governed by and
construed in accordance with the laws of the State of New York.

         SECTION 8. Headings. Section headings in this Amendment are included
herein for convenience of reference only and shall not constitute a part of this
Amendment for any other purpose.

                  [Remainder of Page Intentionally Left Blank]

                                       6
<PAGE>

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

CITICORP USA, INC.                          HELLER FINANCIAL, INC.

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

FIRST UNION COMMERCIAL                      SALOMON BROTHERS HOLDING
CORPORATION                                 COMPANY, INC.

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

NATIONAL CITY COMMERCIAL                    ARK CLO 2000-I, LIMITED
FINANCE, INC.                               By: Patriarch Partners, LLC, as
                                                Attorney-in-Fact
                                            By: LD Investments LLC, as Manager

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

THE INTERNATIONAL BANK OF
MIAMI, N.A.

By:
   ----------------------------
   Caridad C. Errazquin
   Vice President
   Trade Finance Division

Aviation Sales Amendment No. 5                                  Signature Page 1

<PAGE>

FIRSTAR BANK, N.A.                          CITIZENS BUSINESS CREDIT
                                            COMPANY

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

AMSOUTH BANK                                PNC BANK NATIONAL ASSOCIATION

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

Aviation Sales Amendment No. 5                                  Signature Page 2

<PAGE>

BANK OF AMERICA, N.A.

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

Aviation Sales Amendment No. 5                                  Signature Page 3

<PAGE>

AVIATION SALES DISTRIBUTION                 AEROCELL STRUCTURES, INC.
SERVICES COMPANY

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

AVS/M-2, INC.                               WHITEHALL CORPORATION

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

TRIAD INTERNATIONAL MAINTENANCE             AVS/M-3, INC.
CORPORATION

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

AIRCRAFT INTERIOR DESIGN, INC.              CARIBE AVIATION, INC.

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

AVIATION SALES LEASING COMPANY              TIMCO ENGINE CENTER, INC.

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

Aviation Sales Amendment No. 5                                  Signature Page 4

<PAGE>

AERO HUSHKIT CORPORATION                    AVIATION SALES PROPERTY
                                            MANAGEMENT CORP.

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

AVIATION SALES COMPANY                      AVIATION SALES SPS I, INC.

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

AVS/M-1, INC.                               AVSRE, L.P.
                                            By Aviation Sales Property
                                            Management Corp. as General Partner

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

AVIATION SALES FINANCE COMPANY              HYDROSCIENCE, INC.

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

AVIATION SALES MAINTENANCE,                 TIMCO ENGINEERED SYSTEMS, INC.
REPAIR & OVERHAUL, INC.

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

Aviation Sales Amendment No. 5                                  Signature Page 5EXHIBIT 10.60

April 17, 2001

Aviation Sales Distribution Services Company
Aerocell Structures, Inc.
AVS/M-2, Inc.
Whitehall Corporation
Triad International Maintenance Corporation
AVS/M-3, Inc.
Caribe Aviation, Inc.
Aircraft Interior Design, Inc.
Aviation Sales Leasing Company
Timco Engine Center, Inc.
3601 Flamingo Road
Miramar, Florida  33027

         Re: Amended and Restated Term Loan Note, dated May 31, 2000, as
             modified by Note Modification Agreement dated as of February 14,
             2001 (the "Supplemental Term Loan Note")

Gentlemen:

         Reference is made to (i) that certain Amendment No. 5 dated as of April
17, 2001 to Fourth Amended and Restated Credit Agreement dated as of May 31,
2000 (the "Credit Agreement Amendment") and (ii) the Supplemental Term Loan Note
and capitalized terms not otherwise defined herein shall have the meanings
ascribed to them in the Supplemental Term Loan Note.

         The undersigned, as holder of the Supplemental Term Loan Note, hereby
agrees, upon the Borrowers' acknowledgment and acceptance of this letter as
provided below, that, notwithstanding the terms of the Supplemental Term Loan
Note, the payments of installments of principal required to be made in
accordance with the terms of the Supplemental Term Loan Note during the period
commencing on June 14, 2001 and ending on December 14, 2001 shall be due and
payable on the earlier to occur of (i) the date on which payment of such
principal installments under the Supplemental Term Loan Note are permitted to be
made pursuant to the provisions of Section 1.3 of the Credit Agreement Amendment
or (ii) July 31, 2002.

         Except as expressly provided herein, all terms and provisions of the
Supplemental Term Loan Note shall remain and continue in full force and effect.
The execution, delivery and effectiveness of this letter shall not operate as a
waiver of any right, power or remedy of the holder of the Supplemental Term Loan
Note, nor constitute a waiver of any provision contained therein, except as
specifically set forth herein.

<PAGE>

         THE AGREEMENT EVIDENCED BY THIS LETTER SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

         This letter and the acknowledgment and acceptance hereof by the
Borrowers may be executed in one or more counterparts, each of which shall be
deemed an original, but all of which together shall constitute one and the same
agreement. Delivery of an executed counterpart hereof by telecopier shall be
effective as delivery of a manually executed counterpart hereof.

CITICORP USA, INC.

By:
   ---------------------------------
    Keith R. Gerding
    Vice President

The terms and conditions of the above letter are hereby acknowledged and
accepted by each of the undersigned Borrowers under and guarantors of the
payment and performance of the Supplemental Term Loan Note and each such
Borrower and guarantor hereby reaffirms its obligations under the Supplemental
Term Loan Note or guarantee of payment and performance of the aforesaid
Supplemental Term Loan Note and represents and warrants that no consents,
approvals or waivers with respect to the agreements set forth above, which have
not been obtained, are required under the terms of the undersigneds' respective
material contractual obligations. It is expressly understood and agreed by the
undersigned that the above letter merely modifies the payment date for certain
principal installments of the indebtedness evidenced by the Supplemental Term
Loan Note as set forth therein, is not payment for Supplemental Term Loan Note,
and is in no way to constitute a novation of the Supplemental Term Loan Note.

AVIATION SALES DISTRIBUTION                 AEROCELL STRUCTURES, INC.
SERVICES COMPANY

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

AVS/M-2, INC.                               WHITEHALL CORPORATION

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

                                       2
<PAGE>

TRIAD INTERNATIONAL MAINTENANCE             AVS/M-3, INC.
CORPORATION

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

AIRCRAFT INTERIOR DESIGN, INC.              CARIBE AVIATION, INC.

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

TIMCO ENGINE CENTER, INC.                   AVIATION SALES LEASING COMPANY

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

AVS/M-1, INC.                               AVIATION SALES PROPERTY
                                            MANAGEMENT CORP.

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

AVIATION SALES FINANCE COMPANY              AERO HUSHKIT CORPORATION

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

                                       3
<PAGE>

TIMCO ENGINEERED SYSTEMS, INC.              HYDROSCIENCE, INC.

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

AVIATION SALES MAINTENANCE, REPAIR          AVIATION SALES SPS I, INC.
& OVERHAUL COMPANY

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

AVIATION SALES COMPANY                      AVSRE, L.P.
                                            by Aviation Sales Property
                                               Management Corp., as
                                               General Partner

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

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