AEROCENTURY CORP
8-K, 1998-07-06
EQUIPMENT RENTAL & LEASING, NEC
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                     SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

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

Date of Report(Date of earliest event reported): June 30, 1998

                                AeroCentury Corp.
             (Exact name of Registrant as specified in its charter)

Delaware                                                     94-3263974
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                               Identification No.)

1440 Chapin Avenue, Suite 310
Burlingame, California 94010
(Address of principal executive offices)  (Zip code)

                                 (650) 340-1888
               (Registrant's telephone number including area code)

                                 Not applicable
         (Former name and former address, if changed since last report)


Item 5.  Other Events

     On June 30, 1998,  the Company  entered into a Credit  Agreement with First
Union National Bank. The Credit  Agreement  provides for a revolving credit line
of up to $15,000,000,  secured by the Company's  existing assets, and any assets
acquired with the proceeds of the credit line.
 
 
Exhibits
 
Exhibit 10.1 - Credit Agreement

<PAGE>

                                   SIGNATURES

     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.

                                                 AeroCentury Corp.

July 2, 1998                         By:  /s/ Neal D. Crispin
Date                                    -------------------------------------- 
                                    Neal D. Crispin, Chairman of the Board
                                         and President

<PAGE>








                                CREDIT AGREEMENT


                                      among


                                AEROCENTURY CORP.


                                       and


                    Certain Banking Institutions Named Herein


                                      with


                            FIRST UNION NATIONAL BANK
                                    as Agent





                                  June 30, 1998








                                                       
<PAGE>
<TABLE>
<CAPTION>

                                Table of Contents
<S>                                                                                                              <C>

1. Certain Definitions...........................................................................................1
      1.1.  Definitions..........................................................................................1
      1.2.  Accounting Terms.....................................................................................11

2. The Credit....................................................................................................11
      2.1.  The Loans............................................................................................11
             (a) Revolving Credit Loans; Commitment. ............................................................11
             (b) Interest Rate Options. .........................................................................11
             (c) Maximum Loans Outstanding. .....................................................................11
             (d) Minimum Loan Amount. ...........................................................................12
             (e) Prepayment and Reborrowing. ....................................................................12
             (f) Extensions of the Revolver Termination Date. ...................................................12
             (g) Revolving Loan Commitment Percentages. .........................................................12
             (h) Several Obligations. ...........................................................................12
             (i)  Payment of Additional Amount. .................................................................13
      2.2.  The Notes............................................................................................13
      2.3.  Funding Procedures...................................................................................13
             (a)  Request for Advance............................................................................13
             (b)  Actions by Agent...............................................................................13
             (c)  Availability of Funds..........................................................................14
             (d)  Funding Assumptions............................................................................14
             (e)  Proceeds of Loan Being Repaid..................................................................14
      2.4.  Interest Rates.......................................................................................14
             (a)  Base Rate......................................................................................14
             (b)  LIBO Rate......................................................................................14
             (c)  Renewals and Conversions.......................................................................15
             (d)  Reinstatements.................................................................................15
      2.5.  Fees.................................................................................................15
             (a)  Commitment Fee.................................................................................15
             (b)  Structuring and Arranging Fee; Administrative Fee..............................................15
      2.6.  Termination or Reduction of Aggregate Revolving Loan Commitment......................................16
             (a)  Voluntary......................................................................................16
             (b) Termination.....................................................................................16
      2.7.  Loan Prepayments (Optional and Mandatory)............................................................16
             (a)  Base Rate Loans................................................................................16
             (b)  LIBO Rate Loans................................................................................16
      2.8. Payments..............................................................................................16
             (a)  Base Rate Loans................................................................................16
             (b) LIBO Rate Loans.................................................................................16
             (c) Form of Payments, Application of Payments,
                  Payment Administration, Etc....................................................................16
             (d) Net Payments....................................................................................17
             (e) Demand Deposit Account.  .......................................................................18
      2.9. Change in Circumstances, Yield Protection.............................................................18

      2.10. Illegality...........................................................................................19
      2.11. Discretion of Bank as to Manner of Funding...........................................................19

3. Representations and Warranties................................................................................20
      3.1.  Organization, Standing...............................................................................20
      3.2.  Corporate Authority, Validity, Etc...................................................................20
      3.3.  Litigation...........................................................................................20
      3.4.  ERISA................................................................................................20
      3.5.  Financial Statements.................................................................................21
      3.6.  Not in Default, Judgments, Etc.......................................................................21
      3.7.  Taxes................................................................................................21
      3.8.  Permits, Licenses, Etc...............................................................................21
      3.9.  Compliance with Laws, Etc............................................................................21
      3.10.  Solvency............................................................................................21
      3.11.  No Burdensome Agreements............................................................................22
      3.12.  Subsidiaries, Etc...................................................................................22
      3.13.  Title to Properties, Leases.........................................................................22
      3.14.  Public Utility Holding Company; Investment Company..................................................22
      3.15.  Margin Stock........................................................................................22
      3.16.   Use of Proceeds....................................................................................22
      3.17.  Depreciation Policies...............................................................................22
      3.18.  Disclosure Generally................................................................................22

4. Conditions Precedent..........................................................................................23
      4.1.  All Loans............................................................................................23
         (a)  Documents..........................................................................................23
         (b)  Borrowing Base Certificate.........................................................................23
         (c)  Covenants; Representations.........................................................................23
         (d)  Defaults...........................................................................................23
         (e)  Material Adverse Change............................................................................23
      4.2.  Conditions to First Loan.............................................................................23
         (a)  Articles, Bylaws...................................................................................23
         (b)  Evidence of Authorization..........................................................................23
         (c)  Legal Opinions.....................................................................................24
         (d)  Incumbency.........................................................................................24
         (e)  Notes..............................................................................................24
         (f)  Documents..........................................................................................24
         (g)  Consents...........................................................................................24
         (h) Other Agreements....................................................................................24
         (i)  Fees, Expenses.....................................................................................24
         (j)  JMC Subordination Agreement........................................................................24

5. Affirmative Covenants.........................................................................................24
      5.1.  Financial Statements and Reports.....................................................................25
         (a)  Annual Statements..................................................................................25
         (b)  Quarterly Statements...............................................................................25
         (c)  No Default.........................................................................................25
         (d)  ERISA..............................................................................................26
         (e)  Material Changes...................................................................................26
         (f)  Other Information..................................................................................26
         (g)  Borrowing Base Certificates........................................................................26
         (h)  Covenant Complaince Certificate....................................................................26
         (i)   Monthly Lease Portfolio and Receivables Report....................................................26
         (j)   Maintenance of Current Depreciation Policies......................................................26
      5.2. Corporate Existence...................................................................................26
      5.3. ERISA.................................................................................................27
      5.4. Compliance with Regulations...........................................................................27
      5.5. Conduct of Business; Permits and Approvals, Compliance with Laws......................................27
      5.6. Maintenance of Insurance..............................................................................27
      5.7. Payment of Debt; Payment of Taxes, Etc................................................................27
      5.8. Notice of Events......................................................................................27
      5.9. Inspection Rights; Collateral Appraisal...............................................................28
      5.10. Generally Accepted Accounting Principles.............................................................28
      5.11. Compliance with Material Contracts...................................................................28
      5.12. Use of Proceeds......................................................................................29
      5.13. Further Assurances...................................................................................29
      5.14. Restrictive Covenants in Other Agreements............................................................29

6. Negative Covenants............................................................................................29
      6.1. Merger, Consolidation.................................................................................29
      6.2.  Senior Debt..........................................................................................29
      6.3.  Liens................................................................................................29
      6.4.  Guarantees...........................................................................................29
      6.5.  Margin Stock.........................................................................................29
      6.6.  Acquisitions and Investments.........................................................................30
      6.7.  Transfer of Assets; Nature of Business...............................................................30
      6.8.  Restricted Payments..................................................................................30
      6.9.  Accounting Change....................................................................................30
      6.10. Transactions with Affiliates.........................................................................30
      6.11. Restriction on Amendment of this Agreement...........................................................31

7. Financial Covenants...........................................................................................31
      7.1.  Minimum Tangible Net Worth...........................................................................31
      7.2.  Debt Service Coverage Ratio..........................................................................31
      7.3.  Debt to Tangible Net Worth...........................................................................31
      7.4.  Absence of Net Loss..................................................................................31
      7.5.  Borrowing Base.......................................................................................31

8. Default.......................................................................................................31
      8.1.  Events of Default....................................................................................31
         (a)  Payments...........................................................................................32
         (b)  Covenants..........................................................................................32
         (c)  Representations, Warranties........................................................................32
         (d)  Bankruptcy.........................................................................................32
         (e)  Certain Other Defaults.............................................................................32
         (f)   Judgments.........................................................................................32
         (g)  Attachments........................................................................................33
         (h)  Change in Management...............................................................................33
         (i)   Security Interests................................................................................33
         (j)   Material Adverse Change...........................................................................33

9. Agent.........................................................................................................33
      9.1.  Appointment and Authorization........................................................................33
      9.2.  Duties and Obligations...............................................................................34
      9.3.  First Union as a Bank................................................................................34
      9.4.  Independent Credit Decisions.........................................................................35
      9.5.  Indemnification......................................................................................35
      9.6.  Successor Agent......................................................................................35
      9.7.  Allocations Made By First Union......................................................................35

10. Miscellaneous................................................................................................36
      10.1.  Waiver..............................................................................................36
      10.2.  Amendments..........................................................................................36
      10.3.  Governing Law.......................................................................................36
      10.4.  Participations and Assignments......................................................................36
      10.5.  Captions............................................................................................37
      10.6.  Notices.............................................................................................37
      10.7.  Sharing of Collections, Proceeds and Set-Offs; Application of Payments..............................37
      10.8.  Expenses; Indemnification...........................................................................38
      10.9.  Survival of Warranties and Certain Agreements.......................................................39
      10.10.  Severability.......................................................................................39
      10.11.  Banks' Obligations Several; Independent Nature of Banks' Rights....................................39
      10.12.  No Fiduciary Relationship..........................................................................39
      10.13.  CONSENT TO JURISDICTION AND SERVICE OF PROCESS.....................................................39
      10.14.  WAIVER OF JURY TRIAL...............................................................................40
      10.15.  Counterparts; Effectiveness........................................................................40
      10.16.  Use of Defined Terms...............................................................................40
      10.17.  Offsets............................................................................................40
      10.18.  Entire Agreement...................................................................................40





Exhibit A         List of Banks and Commitments
Exhibit B         Note
Exhibit C         Borrowing Base Certificate
Exhibit D         Mortgage and Security Agreement
Exhibit E         Covenant Compliance Certificate
Exhibit F         Depreciation Policies
Schedule 1        Miscellaneous Information
</TABLE>


<PAGE>

     This Credit Agreement,  dated June 30, 1998 (the  "Agreement"),  is entered
into by and between AeroCentury Corp., a Delaware  corporation  ("AeroCentury"),
the  banking  institutions  signatories  hereto  and named in Exhibit A attached
hereto and such other  institutions  that hereafter  become a "Bank" pursuant to
Section 10.4 hereof  (collectively  the "Banks" and  individually  a "Bank") and
FIRST UNION  NATIONAL  BANK, a national  banking  association,  as agent for the
Banks under this  Agreement  ("First  Union" which shall mean in its capacity as
agent unless specifically stated otherwise).


                              Preliminary Statement

     WHEREAS,  AeroCentury desires to have available to it a credit facility the
proceeds of which may be used for the purchase of Equipment (as defined  herein)
for  lease to  unaffiliated  persons,  said  Equipment  and  related  leases  to
constitute part of the Collateral (as defined herein).

     WHEREAS,  AeroCentury  has requested that the Bank or Banks, as applicable,
establish such credit facility and make loans to AeroCentury under the terms and
conditions hereinafter set forth.

     WHEREAS,  the Bank or Banks, as applicable,  is or are willing to establish
such  credit  facility  and to make  loans to  AeroCentury  under  the terms and
conditions hereinafter set forth.

     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. Certain Definitions

     1. Definitions

     "Additional Amount" shall have the meaning set forth in Section 2.1(i).

     "Affiliate"  shall  mean any  Person:  (1)  which  directly  or  indirectly
controls, or is controlled by, or is under common control with AeroCentury;  (2)
which  directly or  indirectly  beneficially  owns or holds ten percent (10%) or
more of any class of voting  stock of  AeroCentury;  or (3) of which ten percent
(10%) or more of the voting stock is directly or indirectly  beneficially  owned
or held by AeroCentury.  The term "control"  means the  possession,  directly or
indirectly,  of the power to direct or cause the direction of the management and
policies of a Person,  whether  through the ownership of voting  securities,  by
contract, or otherwise.

     "Agent" shall mean First Union National Bank.

     "Aggregate  Revolving Loan Commitment"  shall have the meaning set forth in
Section 2.1(a).

<PAGE>

     "Agreement"  shall mean this Credit  Agreement,  as amended,  supplemented,
modified,  replaced,  substituted  for or  restated  from  time to time  and all
exhibits and schedules attached hereto.

     "Base Rate" shall mean,  for any day, the higher of the Federal  Funds Rate
plus 1/2 of 1% or the prime  commercial  lending  rate of First  Union  National
Bank, as announced from time to time at its head office, calculated on the basis
of the actual number of days elapsed in a year of 360 days.

     "Base Rate Loans" shall mean Revolving Credit Loans accruing interest based
on the Base Rate.

     "Borrowing"  shall mean a borrowing  hereunder  consisting of Loans made to
AeroCentury by the Banks on a given occasion.

     "Borrowing  Base" shall mean 70% of the lesser of (1) the acquisition  cost
of each item of Equipment  included in Eligible  Collateral  or (2) the net book
value of each item of Equipment included in Eligible Collateral.  Net book value
shall be calculated using AeroCentury's then current depreciation  practices and
both  (1) and (2)  above  shall be  calculated  in  accordance  with  GAAP.  The
foregoing  test  shall  be  determined  separately  for each  item of  Equipment
included  in  Eligible  Collateral.  Notwithstanding  the  foregoing,  Equipment
subject to Eligible  Leases which have remaining lease terms of less than twelve
months  shall not at any time be  included in the  Borrowing  Base to the extent
such Equipment  constitutes more than 20% of the Borrowing Base. Remaining lease
terms shall not include renewal  options,  except in the case of DASH-7 aircraft
leased to Raytheon  Corporation which are used in the Marshall Islands.  Renewal
options  shall be  included  in the  remaining  lease  terms of leases of DASH-7
aircraft to Raytheon Corporation which are used in the Marshall Islands.

     "Borrowing Base Certificate"  shall mean a certificate in substantially the
form attached  hereto as Exhibit C which shall be signed by the chief  executive
officer,  chief  operating  officer,  chief  financial  officer or a Senior Vice
President of AeroCentury.

     "Business Day" shall mean any day other than a Saturday,  Sunday,  or other
day on which commercial banks are authorized or required to close under the laws
of the  Commonwealth  of  Pennsylvania  or the State of  California  and, if the
applicable  day relates to a LIBO Rate Loan,  or notice  with  respect to a LIBO
Rate Loan, a day on which dealings in Dollar deposits are also carried on in the
London  interbank  market  and banks are open for  business  in London  ("London
Business Day").

     "Capitalized  Lease" shall mean all lease obligations of any Person for any
property  (whether  real,  personal  or  mixed)  which  have  been or  should be
capitalized  on the books of the lessee in accordance  with  Generally  Accepted
Accounting Principles.

     "Capitalized Lease Obligations" with respect to any Person,  shall mean the
aggregate amount which, in accordance with GAAP, is 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 a Capitalized Lease.

     "Closing" shall mean the consummation of all requirements set forth in this
Agreement such that  AeroCentury  shall be entitled to request and receive Loans
hereunder.

     "Closing  Date" shall mean the first date on which both (i) this  Agreement
shall have been executed and delivered by  AeroCentury  and each Bank,  and (ii)
the conditions to the first loan as set forth in Section4.2 shall have been met.

     "Code" shall mean the Internal  Revenue Code of 1986,  as amended from time
to time, and all rules and regulations  with respect thereto in effect from time
to time.

     "Collateral"  shall  mean  those  assets  defined  as  "Collateral"  in the
Security  Agreement  (including but not limited to the Equipment and the related
leases  therefor)  in which  First  Union as Agent is the  "Secured  Party"  (as
defined in the Security  Agreement) and possesses a first  priority,  perfected,
security  interest to secure the  payment,  promptly  when due, and the punctual
performance of all of the "Liabilities" as defined in the Security Agreement.

     "Covenant Compliance Certificate" shall mean a certificate in substantially
the form  attached  hereto as Exhibit E, or such other form as First Union shall
request from time to time, which shall be signed by the chief executive officer,
chief operating  officer,  chief financial officer or a Senior Vice President of
AeroCentury.

     "Debt"  shall  mean,  as of any  date  of  determination  with  respect  to
AeroCentury,  without  duplication,  (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  AeroCentury  as of the date on which  Debt is to be
determined,  (ii) all  indebtedness of others with respect to which  AeroCentury
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 AeroCentury,  including letters of credit,  required to be either
accrued or disclosed in accordance  with GAAP, (iv) lease  obligations  that, in
conformity with GAAP, have been capitalized on AeroCentury's  balance sheet, and
(v) the present value of any outstanding  Operating Lease payments discounted at
10%, LESS (vi) Non-Recourse Debt and (vii) Subordinated debt.

     "Debt  Service" shall mean the sum of (i) current  maturities  (amounts due
within the next twelve  months) of all  Recourse  Debt,  excluding  any lump sum
payments due at the  expiration of any Recourse Debt,  (ii) current  amounts due
(within the next twelve months) in respect of all leases, but excluding any lump
sum payments due at the expiration of any lease,  and (iii) 1/7th of the average
principal balance of the Notes outstanding.

     "Default Rate" on any Loan shall mean 2% per annum above the Base Rate.

     "Dollars" shall mean the lawful currency of the United States of America.

     "EBTDA" shall mean the sum of Net Income plus the amounts deducted from Net
Income as expenses for taxes, depreciation and amortization.
<PAGE>

     "Equipment"  shall  mean  new and used  turboprop  aircraft  and  turboprop
aircraft  engines  each of which is either  subject to an  existing  lease or is
intended to be leased or re-leased within four months immediately  following the
date in question. The aircraft or the aircraft engine, as applicable, shall have
been manufactured  within 25 years  immediately  preceding the date in question,
shall be in good working  order  immediately  or within a  reasonable  period of
time, as determined by First Union,  and shall be usable for  commercial  flight
purposes  immediately  or within a reasonable  period of time,  as determined by
First Union.

     "Eligible  Collateral" shall mean the sum of (1) Equipment  included in the
Collateral which is subject to an Eligible Lease, and (2) Equipment  included in
the Collateral which is not subject to a lease,  provided that (a) the aggregate
of such  Equipment  shall not at any time exceed 10% of the Aggregate  Revolving
Loan Commitment, and (b) the maximum period for which any item of such Equipment
shall not have been subject to an Eligible Lease does not exceed four months.

     "Eligible Lease" shall mean a lease for Equipment to an unaffiliated Person
in which (i)  AeroCentury  is the sole lessor or lessor of not less than a 99.9%
ownership interest in the Equipment, (ii) the lease arose in the ordinary course
of business of AeroCentury, (iii) the Equipment has been delivered to the lessee
and is currently  subject to the lease, (iv) neither the lease nor the Equipment
is  subject to any  currently  outstanding  assignment,  claim,  lien,  security
interest or other limitation on the absolute title of AeroCentury, (v) the lease
payments are not more than 30 days past due with respect to any payment required
thereby (based on the  contractual  terms in existence at the date the lease was
included  in the  Collateral  and not  including  any  subsequent  amendment  or
modification thereof,  unless First Union has specifically  consented thereto in
writing), (vi) the lease is freely assignable by the lessor (with any notices or
consents required in connection therewith having been previously  obtained,  and
subject to any lease  requirements  concerning  the net worth of the  assignee),
(vii) the lease and the Equipment being leased constitute Collateral, (viii) the
remaining  lease term at the time of  assignment  to the Bank is for a period of
seven  years or less,  (ix) the lease is a  noncancellable,  triple net lease in
which the lessee may not assert,  as an offset,  any defenses or claims  against
the lessor arising from the condition or the intended use of the subject matter,
except in the case of leases  with  terms of less  than  twelve  months in which
AeroCentury may be responsible for maintenance and except in the case where of a
lease where AeroCentury assumes the obligation to pay some or all of the cost of
engine overhaul,  airworthiness directives or manufacturer or government ordered
modifications required during the term of the lease, so long as the lease states
the such  obligation is solely that of AeroCentury  and imposes no obligation on
the Banks (whether as secured parties or successor in interest to  AeroCentury's
ownership interest in the lease aircraft) and lessee's only remedy for breach of
the obligation is an independent action against  AeroCentury,  and lessee waives
any and all  right  to  offset  such  obligation  against  lease  payments  owed
AeroCentury, and (x) the lessee is not a resident of, and the Equipment will not
be  subject  to the laws of any,  foreign  jurisdiction  in  which,  in the sole
determination  of  First  Union,  the  ability  of the Bank to  perfect  a first
priority  security interest in the Equipment is unsatisfactory or the ability of
First Union to foreclose  upon the Equipment  and receive  possession to or sell
said Equipment is unsatisfactory.

     "Environmental  Control  Statutes"  shall  mean each and  every  applicable
federal,  state, county or municipal  environmental  statute,  ordinance,  rule,
regulation,  order,  directive  or  requirement,  together  with  all  successor
statutes, ordinances, rules, regulations, orders, directives or requirements, of
any Governmental Authority, including without limitation laws in any way related
to hazardous substances.

     "ERISA" shall mean the Employee  Retirement Income Security Act of 1974, as
it may be amended from time to time.

     "ERISA  Affiliate" shall mean any corporation which is a member of the same
controlled  group of corporations  as AeroCentury  within the meaning of Section
414(b) of the Code, or any trade or business  which is under common control with
AeroCentury within the meaning of Section 414(c) of the Code.

     "Event of Default" shall have the meaning set forth in Section 8.1.

     "Federal  Funds Rate" shall mean,  for any day, the rate per annum (rounded
upwards, if necessary, to the nearest 1/100 of 1%) equal to the weighted average
of the rates on overnight Federal funds transactions with members of the Federal
Reserve  System  arranged by Federal  funds brokers on such day, as published by
the Federal  Reserve Bank of New York on the Business Day next  succeeding  such
day,  provided  that if the day for which such rate is to be determined is not a
Business  Day,  the  Federal  Funds Rate for such day shall be such rate on such
transactions  on the next  preceding  Business  Day as so  published on the next
succeeding Business Day.

     "Fiscal Quarter" shall mean a fiscal quarter of AeroCentury, which shall be
any quarterly period ending on March 31, June 30, September 30 or December 31 of
any year.

     "Fiscal Year" shall mean a fiscal year of  AeroCentury,  which shall end on
the last day of December.

     "Generally Accepted  Accounting  Principles" or "GAAP" shall mean generally
accepted  accounting  principles  as in effect  from time to time in the  United
States, consistently applied.

     "Governmental Authority" shall mean the federal, state, county or municipal
government,  or any  department,  agency,  bureau  or other  similar  type  body
obtaining authority therefrom or created pursuant to any laws.

     "Indebtedness   for  Borrowed  Money"  shall  mean  (i)  all  indebtedness,
liabilities,  and  obligations,  now  existing or hereafter  arising,  for money
borrowed by  AeroCentury  on a recourse  basis  whether or not  evidenced by any
note, indenture, or agreement (including,  without limitation,  the Note and any
indebtedness  for money borrowed from an Affiliate) and (ii) all indebtedness of
others for money borrowed (including  indebtedness of an Affiliate) with respect
to which AeroCentury has become liable on a recourse basis by way of a guarantee
or indemnity.

     "Intangible  Assets"  shall mean all assets  which would be  classified  as
intangible  assets  under  GAAP   consistently   applied,   including,   without
limitation, goodwill (whether representing the excess of cost over book value of
assets acquired or otherwise),  patents,  trademarks,  trade names,  copyrights,
franchises,  and deferred charges (including,  without  limitation,  unamortized
debt  discount and expense,  organization  costs,  and research and  development
costs). For purposes of this definition,  prepayments of taxes, license fees and
other expenses shall not be deemed Intangible Assets.


<PAGE>

     "Interest  Period"  shall mean with  respect  to any LIBO Rate  Loan,  each
period  commencing on the date any such Loan is made, or, with respect to a Loan
being renewed,  the last day of the next preceding  Interest Period with respect
to a Loan, and ending on the numerically  corresponding  day (or, if there is no
numerically  corresponding  day, on the last day of the  calendar  month) in the
first,  second,  third or sixth calendar month  thereafter as selected under the
procedures  specified in Section 2.3, if the Banks are then  offering  LIBO Rate
Loans for such period;  provided that each LIBO Rate Loan Interest  Period which
would  otherwise  end on a day which is not a Business  Day (or, for purposes of
Loans to be repaid on a London  Business Day, such day is not a London  Business
Day) shall end on the next  succeeding  Business Day (or London Business Day, as
appropriate)  unless such next succeeding  Business Day (or London Business Day,
as appropriate)  falls in the next succeeding  calendar month, in which case the
Interest Period shall end on the next preceding Business Day (or London Business
Day, as appropriate).

     "Investment"  in any Person  shall mean (a) the  acquisition  (whether  for
cash,  property,  services or securities or otherwise) of capital stock,  bonds,
notes, debentures,  partnership or other ownership interests or other securities
of such Person;  (b) any deposit  with, or advance,  loan or other  extension of
credit to, such Person (other than any such deposit,  advance, loan or extension
of  credit  having a term  not  exceeding  90 days in the  case of  unaffiliated
Persons and 120 days in the case of Affiliates  representing  the purchase price
of  inventory  or supplies  purchased  in the  ordinary  course of  business) or
guarantee or  assumption  of, or other  contingent  obligation  with respect to,
Indebtedness  for Borrowed  Money or other  liability  of such  Person;  and (c)
(without  duplication  of the  amounts  included in (a) and (b)) any amount that
may,  pursuant  to the  terms  of  such  investment,  be  required  to be  paid,
deposited,  advanced,  lent or extended to or guaranteed or assumed on behalf of
such Person.

     "JMC" shall have the meaning set forth in Section 6.6.

     "LIBO Rate" shall mean, for the applicable  Interest Period,  (i) the rate,
rounded upwards to the next  one-sixteenth  of one percent,  determined by First
Union two London Business Days prior to the date of the corresponding  LIBO Rate
Loan, at which First Union is offered deposits in dollars at approximately 11:00
A.M.,  London time by leading banks in the interbank  eurodollar or eurocurrency
market  for  delivery  on the date of such  Loan in an  amount  and for a period
comparable  to the amount and  Interest  Period of such Loan and in like  funds,
divided  by  (ii) a  number  equal to one  (1.0)  minus  the LIBO  Rate  Reserve
Percentage.  The LIBO Rate shall be adjusted  automatically  with respect to any
LIBO Rate Loan  outstanding on the effective date of any change in the LIBO Rate
Reserve Percentage,  as of such effective date. LIBO Rate shall be calculated on
the basis of the number of days elapsed in a year of 360 days.

<PAGE>

     "LIBO Rate 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 First Union 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 First Union from time to time under
Regulation  D.  Without  limiting  the  effect of the  foregoing,  the LIBO Rate
Reserve Percentage shall reflect any other reserves required to be maintained by
First Union 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.

     "LIBO Rate Loans" shall mean Revolving Credit Loans accruing interest based
on the LIBO Rate.

     "Lien" shall mean any lien, mortgage,  security interest, chattel mortgage,
pledge  or other  encumbrance  (statutory  or  otherwise)  of any kind  securing
satisfaction  of any  obligation to any Person,  including any agreement to give
any of the foregoing,  any conditional sales or other title retention agreement,
any lease in the nature thereof,  and the filing of or the agreement to give any
financing  statement under the Uniform  Commercial  Code of any  jurisdiction or
similar  evidence  of any  encumbrance,  whether  within or  outside  the United
States.

     "Loan" or "Loans" shall have the meanings set forth in Section 2.1.

     "Loan  Documents"  shall  mean this  Agreement,  the  Notes,  the  Security
Agreement,  the Guaranty  Agreement and all other documents  directly related or
incidental to said documents, the Loans or the Collateral.

     "Management Agreement" shall have the meaning set forth in Section 6.6.

     "Material  Adverse  Change" shall mean any event or condition  which (a) is
reasonably likely to result, in the determination of First Union or the Required
Banks,  in a  material  adverse  change in the  financial  condition,  business,
properties  or  prospects of  AeroCentury,  or (b) gives  reasonable  grounds to
conclude that AeroCentury, will not be able to perform or observe (in the normal
course)  its  existing  obligations  under the Loan  Documents  to which it is a
party, including but not limited to the Notes.

     "Material  Adverse Effect" shall mean a material  adverse effect on (i) the
financial condition, business, properties, or prospects of AeroCentury, (ii) the
ability of AeroCentury to perform its existing obligations under this Agreement,
the Notes and the other  Loan  Documents,  or (iii) the  legality,  validity  or
enforceability  of this Agreement or the Notes or the rights and remedies of the
holders of the Loans.

     "Monthly  Lease  Portfolio and  Receivables  Report" shall mean a report in
summary form of the status of accounts receivable in respect of all leases which
are part of the  Collateral in form and  substance  reasonably  satisfactory  to
First Union.

     "Multiemployer  Plan" shall mean a  multiemployer  plan as defined in ERISA
Section  4001(a)(3),   which  covers  employees  of  AeroCentury  or  any  ERISA
Affiliate.

     "Net  Income"  shall mean net  income  after  income  taxes as shown on the
income statement.

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


<PAGE>

     "Non-Recourse  Debt" shall mean Debt with  respect to which the creditor or
lender does not have recourse  against  AeroCentury by reason of any guaranty or
other obligation on the part of AeroCentury.
         
     "Note" or "Notes" shall have the meaning set forth in Section 2.2.

     "Obligations"  shall mean all now  existing  or  hereafter  arising  debts,
obligations,  covenants,  and duties of payment or  performance  of every  kind,
matured or unmatured,  direct or contingent,  owing, arising, due, or payable to
the Banks or First Union, as Agent, by or from  AeroCentury  arising out of this
Agreement  or any  other  Loan  Document,  including,  without  limitation,  all
obligations  to  repay  principal  of  and  interest  on the  Loans,  and to pay
interest,  fees,  costs,  charges,  expenses,  professional  fees,  and all sums
chargeable to AeroCentury or for which AeroCentury is liable as indemnitor under
the Loan Documents, whether or not evidenced by any note or other instrument.

     "Operating  Lease",  with respect to any Person,  shall mean 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.

     "PBGC"  shall  mean  the  Pension  Benefit  Guaranty  Corporation  and  any
successor thereto.

     "Pension Plan" shall mean, at any time, any Plan (including a Multiemployer
Plan),  the  funding  requirements  of which  (under  ERISA  Section 302 or Code
Section 412) are, or at any time within the six years immediately  preceding the
time in question, were in whole or in part, the responsibility of AeroCentury or
any ERISA Affiliate.

<PAGE>

     "Permitted  Liens" shall mean (a) any Liens for current taxes,  assessments
and other  governmental  charges not yet due and payable or being  contested  in
good faith by  AeroCentury  by  appropriate  proceedings  and for which adequate
reserves have been  established  by  AeroCentury  as reflected in  AeroCentury's
financial   statements;   (b)   any   mechanic's,   materialman's,    carrier's,
warehousemen's  or similar Liens for sums not yet due or being contested in good
faith by AeroCentury by appropriate  proceedings and for which adequate reserves
have been  established by AeroCentury  as reflected in  AeroCentury's  financial
statements;  (c)  easements,  rights-of-way,   restrictions  and  other  similar
encumbrances  on the real  property or fixtures of  AeroCentury  incurred in the
ordinary  course of business  which  individually  or in the  aggregate  are not
substantial in amount and which do not in any case  materially  detract from the
value or  marketability  of the property  subject  thereto or interfere with the
ordinary  conduct of the  business of  AeroCentury;  (d) Liens (other than Liens
imposed on any property of  AeroCentury  pursuant to ERISA or Section 412 of the
Code)  incurred or deposits made in the ordinary  course of business,  including
Liens in connection with workers' compensation, unemployment insurance and other
types of social security and Liens to secure  performance of tenders,  statutory
obligations,  surety  and  appeal  bonds (in the case of appeal  bonds such Lien
shall not secure any reimbursement or indemnity  obligation in an amount greater
than $250,000), bids, leases that are not Capitalized Leases, performance bonds,
sales  contracts and other similar  obligations,  in each case,  not incurred in
connection  with the  obtaining of credit or the payment of a deferred  purchase
price, and which do not, in the aggregate,  result in a Material Adverse Effect;
(e) Liens, if any,  existing on the date hereof and listed in Schedule 1 hereto;
and (f) Liens on the assets of Unrestricted Subsidiaries.

     "Person"  shall  mean  any  individual,  corporation,   partnership,  joint
venture,  association,  company,  business  trust or entity,  or other entity of
whatever nature.

     "Plan"  shall mean an employee  benefit  plan as defined in Section 3(3) of
ERISA,
other than a Multiemployer  Plan, whether formal or informal and whether legally
binding or not.

     "Potential  Default" shall mean an event,  condition or  circumstance  that
with the  giving  of notice  or lapse of time or both  would  become an Event of
Default.

     "Prohibited  Transaction" shall mean a transaction that is prohibited under
Code Section 4975 or ERISA Section 406 and not exempt under Code Section 4975 or
ERISA Section 408.

     "Recourse  Debt"  shall  mean Debt with  respect to which the  creditor  or
lender has or may have recourse against AeroCentury by reason of any guaranty or
other obligation on the part of AeroCentury.

     "Regulation" shall mean any statute, law, ordinance,  regulation,  order or
rule of any United States or foreign,  federal, state, local or other government
or governmental body, including,  without limitation,  those covering or related
to banking, financial transactions,  securities, public utilities, environmental
control,  energy,  safety,  health,  transportation,  bribery,  record  keeping,
zoning,  antidiscrimination,  antitrust, wages and hours, employee benefits, and
price and wage control matters.

     "Regulation  D" shall mean  Regulation  D of the Board of  Governors of the
Federal Reserve System, as it may be amended from time to time.

     "Regulatory  Change" shall mean any change after the date of this Agreement
in any Regulation  (including Regulation D) or the adoption or making after such
date of any  interpretations,  directives or requests of or under any Regulation
(whether  or not  having  the  force  of law) by any  court or  governmental  or
monetary  authority charged with the  interpretation  or administration  thereof
applying to a class of banks  including  any one of the Banks but  excluding any
foreign office of any Bank.

     "Reportable  Event" shall mean,  with respect to a Pension Plan: (a) Any of
the events set forth in ERISA Sections 4043(b) (other than a reportable event as
to which the provision of 30 days' notice to the PBGC is waived under applicable
regulations)  or 4063(a) or the regulations  thereunder,  (b) an event requiring
any  AeroCentury  or any ERISA  Affiliate to provide  security to a Pension Plan
under Code  Section  401(a)(29)  and (c) any failure by any  AeroCentury  or any
ERISA Affiliate to make payments required by Code Section 412(m).

     "Request for Advance" shall have the meaning set forth in Section 2.3.(a).

<PAGE>

     "Required  Banks"  at any  time  shall  mean  Banks  whose  Revolving  Loan
Commitments  equal  or  exceed  66 2/3% of the  total  of  such  Revolving  Loan
Commitments  if no Loans are  outstanding  or, if Loans are  outstanding,  Banks
whose outstanding Loans equal or exceed 66 2/3% of the Loans.

     "Revolver  Termination  Date"  shall have the  meaning set forth in Section
2.1(a).

     "Revolving  Loan  Commitment"  shall have the  meaning set forth in Section
2.1(a).

     "Revolving Loan Commitment Percentage" shall mean with respect to each Bank
the percentage set forth opposite its name in Exhibit A hereto.

     "Revolving Credit Loan" shall have the meaning set forth in Section 2.1(a).

     "Revolving Credit Note" shall have the meaning set forth in Section 2.2.

     "Security  Agreement" shall mean the Mortgage and Security Agreement in the
form and substance attached hereto as Exhibit D.

     "Solvent"  shall  mean,  with  respect to any  Person,  that the  aggregate
present fair saleable  value of such  Person's  assets is in excess of the total
amount of its probable liabilities on its existing debts as they become absolute
and matured,  such Person has not incurred debts beyond its foreseeable  ability
to pay such debts as they  mature,  and such  Person  has  capital  adequate  to
conduct the business it is presently engaged in or is about to engage in.

     "Subordinated  Debt"  shall  mean Debt  which is  subordinated  in right of
payment and all other respects to the Obligations,  including but not limited to
the Notes, pursuant to a written  subordination  agreement in form and substance
satisfactory to the Banks.

     "Subsidiary"  shall mean a corporation  or other entity the shares of stock
or other  equity  interests of which  having  ordinary  voting power (other than
stock  or other  equity  interests  having  such  power  only by  reason  of the
happening  of a  contingency)  to elect a majority of the board of  directors or
other managers of such  corporation  are at the time owned, or the management of
which is  otherwise  controlled,  directly  or  indirectly  through  one or more
intermediaries or both, by AeroCentury.

     "Tangible Net Worth" shall mean Net Worth, minus Intangible Assets.

     "Termination  Event"  shall mean,  with  respect to a Pension  Plan:  (a) a
Reportable  Event,  (b) the  termination  of a Pension  Plan, or the filing of a
notice of intent to terminate a Pension Plan, or the treatment of a Pension Plan
amendment as a termination  under ERISA Section 4041(c),  (c) the institution of
proceedings  to  terminate a Pension  Plan under ERISA  Section  4042 or (d) the
appointment  of a trustee to  administer  any Pension  Plan under ERISA  Section
4042.

     "Unfunded Pension Liabilities" shall mean, with respect to any Pension Plan
at any time, the amount determined by taking the accumulated benefit obligation,
as disclosed in accordance  with Statement of Accounting  Standards No. 87, over
the fair market value of Pension Plan assets.

<PAGE>

     "Unrecognized  Retiree Welfare  Liability"  shall mean, with respect to any
Plan that provides  post-retirement  benefits other than pension  benefits,  the
amount of the accumulated  post-retirement benefit obligation,  as determined in
accordance with Statement of Financial  Accounting  Standards No. 106, as of the
most recent  valuation  date.  Prior to the date such statement is applicable to
AeroCentury, such amount of the obligation shall be based on an estimate made in
good faith.

     "Unrestricted  Subsidiaries"  shall  mean  Subsidiaries  which are  special
purpose or bankruptcy  remote that have debt on their respective  balance sheets
which when  consolidated  with AeroCentury is deemed to be Non-Recourse  Debt to
AeroCentury.

     1.2. Accounting Terms. All accounting terms not specifically defined herein
shall be construed in accordance with Generally Accepted  Accounting  Principles
consistent  with those applied in the  preparation  of the financial  statements
referred to in Section 3.5, and all financial  data  submitted  pursuant to this
Agreement shall be prepared in accordance with such principles.


                                  2. The Credit

        2.1.  The Loans.

     (a) Revolving Credit Loans; Commitment. Subject to the terms and conditions
herein set forth, each Bank agrees, severally and not jointly, to make revolving
credit loans  (collectively,  the "Revolving  Credit Loans" or the "Loans",  and
individually a "Revolving  Credit Loan" or a "Loan") to AeroCentury from time to
time during the period  beginning on the date hereof and ending on June 30, 2000
or on the  earlier  date of  termination  in full,  pursuant  to Section  2.6 or
Section 6.2 hereof, of the obligations of such Bank under this Section 2.1 (June
30, 2000 or such earlier date of  termination  being herein called the "Revolver
Termination  Date") in  amounts  not to exceed at any time  outstanding,  in the
aggregate,  the  commitment  amount set forth  opposite the name of such Bank on
Exhibit A hereto  (each  such  amount,  as the same may be reduced  pursuant  to
Section  2.6  hereof  being  hereinafter  called  such  Bank's  "Revolving  Loan
Commitment").  The  Banks'  collective  commitment  to make  Loans  shall be the
"Aggregate  Revolving  Loan  Commitment".  All Loans  shall be made by the Banks
simultaneously and pro rata in accordance with their respective Commitments. All
Loans shall be made to AeroCentury at the main office of First Union,  Broad and
Chestnut Streets, Philadelphia, Pennsylvania 19101.

     (b) Interest Rate Options.  AeroCentury may request  Revolving Credit Loans
to bear  interest at the Base Rate or LIBO Rate  options  (described  in Section
2.4). The Loans  outstanding at any one time may involve any combination of such
interest rate options in such amounts as AeroCentury  may determine,  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 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.

<PAGE>

     (c) Maximum Loans Outstanding. AeroCentury shall not be entitled to any new
Revolving Credit Loan if, after giving effect to such Loan, the unpaid amount of
the  then  outstanding  Loans  would  exceed  the  lesser  of (i) the  Aggregate
Revolving Loan Commitment or (ii) the then current  Borrowing Base, as stated in
the most recent Borrowing Base Certificate  furnished to First Union as provided
herein.

     (d) Minumum Loan Amount.  Except for Loans which exhaust the full remaining
amount of the Aggregate  Revolving Loan Commitment and conversions  which result
in the  conversion  of all Loans  subject to a particular  interest rate option,
each of which may be in lesser  amounts,  (i) 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,  and (ii) each Base Rate Loan when made (and each conversion
of LIBO Rate Loans into Base Rate Loans) shall be in an amount at least equal to
$250,000 or, if greater, then in such minimum amount plus $25,000 multiples.

     (e) Prepayment and Reborrowing.  Prior to the Revolver Termination Date and
within the limits of the Aggregate  Revolving Loan  Commitment and the Borrowing
Base,  AeroCentury may borrow,  prepay and reborrow  Revolving Credit Loans. All
Revolving  Credit  Loans  shall  mature and be due and  payable on the  Revolver
Termination Date.

     (f) Extensions of the Revolver Termination Date. Annually, not less than 90
days prior to the end of the existing Agreement Year, AeroCentury may request in
writing to First Union that the  Facility  Termination  Date be extended for one
full year. The term "Agreement  Year" shall mean a one year period ending on the
same month and day as the Revolver  Termination Date. Upon receipt,  First Union
will promptly  distribute  notice of such request to the Banks.  The Banks shall
notify  First  Union  not  less  than 60 days  prior to the last day of the then
current  Agreement  Year  of  their  willingness  to  establish  a new  Revolver
Termination  Date. If all Banks agree to a new Revolver  Termination Date, First
Union,  on or  before  the 30th day prior to the end of the  existing  Agreement
Year,  shall advise  AeroCentury  and the Banks,  in writing,  that the Revolver
Termination  Date has been  extended for one full year  (stating the date of the
new Revolver  Termination  Date) and this  Agreement  shall be deemed amended to
such extent. If AeroCentury shall not have received an extension in writing from
First Union on or before the 30th day prior to the end of the existing Agreement
Year, the Revolver Termination Date shall not be deemed to have been extended.

     (g) Revolving Loan Commitment  Percentages.  The obligation of each Bank to
make a Loan to AeroCentury  at any time shall be limited to its percentage  (the
"Revolving  Loan  Commitment  Percentage")  as set  forth  opposite  its name on
Exhibit  A hereto  multiplied  by the  aggregate  principal  amount  of the Loan
requested.  The principal  amounts of the respective  Loans made by the Banks on
the  occasion  of each  Borrowing  shall be pro rata in  accordance  with  their
respective Revolving Loan Commitment  Percentages.  No Bank shall be required or
permitted to make any Loan if, immediately after giving effect to such Loan, and
the application of the proceeds of a Loan to the extent applied to the repayment
of the Loans, the sum of such Bank's Loans  outstanding would exceed such Bank's
Revolving Loan Commitment.

     (h) Several Obligations. The failure of any one or more Banks to make Loans
in accordance with its or their obligations shall not relieve the other Banks of
their several obligations hereunder,  but in no event shall the aggregate amount
at any one time  outstanding  which any Bank shall be required to lend hereunder
exceed its Revolving Loan Commitment.

<PAGE>

     (i) Payment of  Additional  Amount.  If any  principal  of a LIBO Rate Loan
shall be repaid (whether upon prepayment,  reduction of the Aggregate  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 AeroCentury fails for any reason to borrow a LIBO Rate Loan
after giving  irrevocable  notice  pursuant to Section 2.3, it shall pay to each
Bank, in addition to the principal and interest then to be paid, such additional
amounts as may be necessary to compensate  each 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 such Bank,  and
including  lost profits  incurred or sustained by such Bank) as a result of such
repayment or failure to borrow (the "Additional Amount").  The Additional Amount
(which each Bank shall take reasonable  measures to minimize) shall be specified
in a written notice or certificate  delivered to AeroCentury by First Union,  as
Agent, in the form provided by each 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.

     2.2 The Notes.  The  Revolving  Credit Loans made by each Bank shall all be
evidenced by a single  promissory note of AeroCentury (each such promissory note
as it may be amended, extended, modified or renewed a "Revolving Credit Note" or
a "Note" and together the "Revolving  Credit Notes" or the "Notes") in principal
face amount equal to such Bank's Revolving Loan Commitment, payable to the order
of such  Bank and  otherwise  in the form  attached  hereto  as  Exhibit B.  The
Revolving  Credit Notes shall be dated the Closing Date,  shall bear interest at
the rate per annum and be payable as to  principal  and  interest in  accordance
with the terms hereof. The Revolving Credit Notes shall mature upon the Revolver
Termination  Date and, upon maturity,  each  outstanding  Revolving  Credit Loan
evidenced thereby shall be due and payable. Notwithstanding the stated amount of
any Revolving  Credit Note,  the liability of  AeroCentury  under each Revolving
Credit Note shall be limited at all times to the outstanding principal amount of
the Revolving  Credit Loans by each Bank  evidenced  thereby,  plus all interest
accrued thereon and the amount of all costs and expenses then payable hereunder,
as  established  by each such Bank's books and records,  which books and records
shall be conclusive absent manifest error.

     2.3. Funding Procedures.

     (a) Request for Advance.  Each  request for a Revolving  Credit Loan or the
conversion  or renewal of an interest  rate with respect to a Loan shall be made
not later than 1:00 p.m.  EST on a Business  Day by delivery to First Union of a
written  request  signed by  AeroCentury  or, in the  alternative,  a  telephone
request followed promptly by written confirmation of the request (a "Request for
Advance"),  specifying the date and amount of the Loan to be made,  converted or
renewed,  selecting the interest rate option applicable thereto, and in the case
of LIBO Rate Loans, specifying the Interest Period applicable to such Loans. The
form of request to be used in connection with the making,  conversion or renewal
of Revolving  Credit Loans shall be that form provided to  AeroCentury  by First
Union.  Each  request  shall be received not less than one Business Day prior to
the date of the proposed  borrowing,  conversion  or renewal in the case of Base
Rate Loans,  and three  London  Business  Days prior to the date of the proposed
borrowing,  conversion  or  renewal in the case of LIBO Rate  Loans.  No request
shall be effective  until  actually  received in writing by First Union,  as the
Agent.

<PAGE>


     (b) Actions by Agent.  Upon  receipt of a Request  for  Advance and if the
conditions  precedent  provided  herein  shall be  satisfied at the time of such
request, First Union promptly shall notify each Bank of such request and of such
Bank's ratable share of such Loan.  Upon receipt by First Union of a Request for
Advance, the request shall not be revocable by AeroCentury.

     (c)  Availability  of Funds.  Not later than 12:00 p.m.  EST on the date of
each Loan,  each Bank shall make  available  (except as  provided  in clause (d)
below) its ratable share of such Loan, in immediately  available funds, to First
Union at the address set forth opposite its name on the signature page hereof or
at such account in London as First Union shall  specify to  AeroCentury  and the
Banks.  Unless First Union knows that any applicable  condition specified herein
has not been  satisfied,  it will  make the  funds so  received  from the  Banks
immediately available to AeroCentury on the date of each Loan by a credit to the
account of AeroCentury at First Union' aforesaid address.

     (d) Funding Assumptions. Unless First Union shall have been notified by any
Bank at least one  Business Day prior to the date of the making,  conversion  or
renewal of any LIBO Rate Loan,  or by 3:00 P.M.  on the date a Base Rate Loan is
requested, that such Bank does not intend to make available to First Union, such
Bank's portion of the total amount of the Loan to be made,  converted or renewed
on such  date,  First  Union may  assume  that  such  Bank has made such  amount
available  to  First  Union on the date of the Loan  and  First  Union  may,  in
reliance upon such  assumption,  make available to  AeroCentury a  corresponding
amount.  If and to the  extent  such  Bank  shall  not have so made  such  funds
available  to First  Union,  such Bank agrees to repay First Union  forthwith on
demand such  corresponding  amount together with interest thereon,  for each day
from the date such amount is made available to  AeroCentury  until the date such
amount is repaid to First Union,  at the Federal Funds Rate plus 50 basis points
for three  Business  Days,  and  thereafter at the Base Rate. If such Bank shall
repay to First Union such  corresponding  amount,  such  amounts so repaid shall
constitute  such Bank's Loan for purposes of this  Agreement.  If such Bank does
not  repay  such  corresponding  amount  forthwith  upon  First  Union's  demand
therefor,  First Union shall promptly notify AeroCentury,  and AeroCentury shall
immediately pay such corresponding amount to First Union, without any prepayment
penalty or premium,  but with interest on the amount  repaid,  for each day from
the date such amount is made available to AeroCentury until the date such amount
is repaid to First Union, at the rate of interest applicable at the time to such
Loan.  Nothing  herein shall be deemed to relieve any Bank of its  obligation to
fulfill its Revolving Loan Commitment hereunder or to prejudice any rights which
AeroCentury  may have  against  any Bank as a result of any default by such Bank
hereunder.

     (e) Proceeds of Loan Being Repaid.  If the Banks make a Loan on a day on
which all or any part of an  outstanding  Loan  from the Banks is to be  repaid,
each Bank shall apply the  proceeds of its new Loan to make such  repayment  and
only an  amount  equal to the  difference  (if any)  between  the  amount  being
borrowed and the amount  being  repaid  shall be made  available by such Bank to
First Union as provided in clause (c).

    2.4. Interest Rates.

     (a) Base Rate.  Each Base Rate Loan shall bear interest on the principal
amount  thereof from the date made until such Loan is paid in full or converted,
at a rate per annum equal to the Base Rate determined from time to time.

<PAGE>

     (b) LIBO Rate.  Each LIBO Rate Loan shall bear  interest  on the  principal
amount thereof from the date made until such Loan is paid in full,  renewed,  or
converted,  at a rate per annum  equal to the LIBO  Rate  plus 200 basis  points
(2.0%).  After  receipt of a request  for a LIBO Rate Loan,  First  Union  shall
proceed to determine the LIBO Rate to be applicable  thereto.  First Union shall
give prompt notice by telephone or facsimile to AeroCentury  and to each Bank of
the LIBO Rate thus  determined  in  respect of each LIBO Rate Loan or any change
therein.  In the  event  AeroCentury  fails or is not  permitted  to  select  an
Interest  Period for any LIBO Rate Loan which is maturing within the time period
and otherwise as provided  herein,  such Loan shall be  automatically  converted
into a Base Rate Loan on the last day of the Interest Period for such Loan.

     (c) Renewals and Conversions.  AeroCentury  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) AeroCentury  shall give First Union
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 each of the Banks,  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. First Union shall use its best efforts to
notify  AeroCentury 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 AeroCentury's  obligations or the Banks' rights and
remedies hereunder in any way whatsoever.

     (d)  Reinstatements.  The liability of  AeroCentury  under this Section 2.4
shall continue to be effective or be automatically  reinstated,  as the case may
be, if at any time  payment,  in whole or in part, of any of the payments to the
Banks  is  rescinded  or  must  otherwise  be  restored  or  returned  upon  the
insolvency,   bankruptcy,   dissolution,   liquidation  or   reorganization   of
AeroCentury or any other person,  or upon or as a result of the appointment of a
custodian,  receiver,  trustee or other officer with similar powers with respect
to AeroCentury or any other Person or any substantial  part of its property,  or
otherwise, all as though such payment had not been made.

    2.5. Fees.

     (a) Commitment Fee. AeroCentury agrees to pay to First Union, as the Agent,
for the account of each Bank, a commitment fee (the  "Commitment  Fee") computed
on the basis of a year of 365 days for the actual  number of days  elapsed in an
amount  equal to _ of 1% per annum times the average  daily amount of the unused
portion of the Aggregate Revolving Loan Commitment.  The Commitment Fee shall be
payable  commencing with the date hereof and shall continue to and including the
Revolver  Termination  Date. The unused portion of the Aggregate  Revolving Loan
Commitment  shall mean the Aggregate  Revolving Loan  Commitment less the unpaid
principal  amount of all Loans. The Commitment Fee shall be payable in quarterly
installments  on the  last  Business  Day of each  calendar  quarter  and on the
Revolver Termination Date.

     (b)  Structuring and Arranging Fee;  Administrative  Fee. A Structuring and
Arranging Fee as well as an  Administrative  Fee shall be payable to First Union
as set forth in a separate letter agreement between First Union and AeroCentury.

<PAGE>


     2.6. Termination or Reduction of Aggregate Revolving Loan Commitment.

     (a) Voluntary. AeroCentury may at any time, on not less than three Business
Days' written notice,  terminate or permanently  reduce the Aggregate  Revolving
Loan  Commitment pro rata among the Banks,  provided that any reduction shall be
in the amount of  $1,000,000  or a multiple  thereof and that no such  reduction
shall cause the principal  amount of Loans  outstanding  to exceed the Aggregate
Revolving Credit Commitment as reduced or the Borrowing Base, whichever is less.

     (b) Termination. In the event the Aggregate  Revolving Loan Commitment is
terminated,  the Revolver  Termination  Date shall  accelerate  and  AeroCentury
shall, simultaneously with such termination,  repay the Base Rate Loans and LIBO
Rate Loans in accordance with Section 2.8.

    2.7. Loan Prepayments (Optional and Mandatory).

     (a) Base Rate Loans. On one Business Day's notice to the Banks, AeroCentury
may, at its  option,  prepay the Base Rate Loans in whole at any time or in part
from time to time,  provided that each partial  prepayment  shall be in at least
the principal amount of $25,000 or, if greater, then in $10,000 multiples.

     (b) LIBO Rate Loans.  AeroCentury  may, at its option  prepay any LIBO Rate
Loan  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 each 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 such Bank as a
result of such prepayment or failure to borrow as provided in Section 2.1(f).

     2.8. Payments.

     (a) Base Rate Loans.  Accrued interest on all Base Rate Loans shall be due
and  payable  on the  first  Business  Day of each  calendar  month and upon the
Revolver Termination Date.

     (b) LIBO Rate Loans.  Accrued  interest  on LIBO Rate Loans with  Interest
Periods of one,  two or three months shall be due and payable on the last day of
such Interest Period.  Accrued interest on LIBO Rate Loans with Interest Periods
of six months  shall be due and payable at the end of the third month and on the
last day of the Interest Period.

<PAGE>

     (c) Form of Payments, Application of Payments, Payment Administration, Etc.
Provided that no Event of Default or Potential Default then exists, all payments
and  prepayments  shall be applied to the Loans in such order and to such extent
as shall be specified by  AeroCentury,  by written  notice to First Union at the
time of such payment or prepayment.  Except as otherwise  provided  herein,  all
payments of principal,  interest,  fees, or other amounts payable by AeroCentury
hereunder shall be remitted to First Union on behalf of the Banks at the address
set forth  opposite its name on the  signature  page hereof or at such office or
account  as  First  Union  shall  specify  to  AeroCentury  and  the  Banks,  in
immediately  available  funds not later than 2:00 p.m.  Eastern  Time on the day
when due. First Union will promptly  distribute to each Bank by wire transfer in
immediately  available  funds each Bank's pro rata share of such  payment  based
upon such Bank's Revolving Loan Commitment  Percentage.  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.  AeroCentury  authorizes  First
Union to deduct from any account of  AeroCentury  Borrower  maintained  at First
Union or over  which  First  Union has  control  any amount  payable  under this
Agreement,  the Notes or any other Loan  Document  which is not paid in a timely
manner.  First  Union'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 AeroCentury's obligation to pay any installment of principal, interest or
any other amount under this Agreement when due and payable.

     (d) Net Payments.  All payments  made to the Banks and First Union,  as the
Agent, by AeroCentury hereunder, under any Note or under any other Loan Document
will be made without set off,  counterclaim or other defense.  All such payments
will be made free and clear of, and without  deduction or  withholding  for, any
present or future taxes, levies,  imposts,  duties,  fees,  assessments or other
charges of whatever nature now or hereafter  imposed by any  jurisdiction or any
political  subdivision or taxing  authority  thereof or therein (but  excluding,
except as  provided  below,  any tax  imposed on or measured by the gross or net
income of a Bank  (including  all  interest,  penalties  or similar  liabilities
related  thereto)  pursuant  to the laws of the United  States of America or any
political  subdivision  thereof,  or taxing  authority  of the United  States of
America or any political  subdivision  thereof, in which the principal office or
applicable lending office of such Bank is located), and all interest,  penalties
or similar  liabilities  with respect thereto  (collectively,  together with any
amounts payable pursuant to the next sentence, "Taxes").  AeroCentury shall also
reimburse each Bank, upon the written request of such Bank, for Taxes imposed on
or measured by the gross or net income of such Bank  pursuant to the laws of the
United States of America (or any State or political subdivision thereof), or the
jurisdiction (or any political subdivision or taxing authority thereof) in which
the  principal  office or applicable  lending  office of such Bank is located as
such Bank shall  determine  are  payable by such Bank due to the amount of Taxes
paid to or on behalf of such Bank pursuant to this or the preceding sentence. If
any Taxes are so levied or imposed, AeroCentury agrees to pay the full amount of
such  Taxes,  and such  additional  amounts  as may be  necessary  so that every
payment of all  amounts  due  hereunder,  under any Note or under any other Loan
Document,  after  withholding or deduction for or on account of any Taxes,  will
not be less than the amount  provided  for  herein or in such Note.  AeroCentury
will  furnish  to First  Union upon  request  certified  copies of tax  receipts
evidencing  such payment by  AeroCentury.  AeroCentury  will  indemnify and hold
harmless First Union and each Bank, and reimburse  First Union or such Bank upon
its written  request,  for the amount of any Taxes so levied or imposed and paid
or withheld by such Bank.

     Notwithstanding the preceding paragraph,  AeroCentury shall be entitled, to
the extent  required to do so by law, to deduct or withhold Taxes imposed by the
United  States of America  (or any  political  subdivision  or taxing  authority
thereof) from interest,  fees or other amounts payable hereunder for the account
of any Person other than a Bank (x) that is a domestic corporation (as such term
is defined in Section  7701 of the Code) for federal  income tax  purposes  (but
excluding  any foreign  office of any Bank) or (y) that has  necessary  forms on
file  with  AeroCentury  for the  applicable  year to the  extent  deduction  or
withholding  of such  Taxes is not  required  as a result of the  filing of such
forms,  provided that if AeroCentury shall so deduct or withhold any such Taxes,
it shall  provide a statement  to First Union and such Bank,  setting  forth the
amount of such  Taxes so paid or  withheld,  the  applicable  rate and any other
information  or  documentation  which  such  Bank  may  reasonably  request  for
assisting such Bank to obtain any allowable  credits or deductions for the taxes
so deducted or withheld in the  jurisdiction or jurisdictions in which such Bank
is subject to tax.

<PAGE>

     (e) Demand Deposit Account.  AeroCentury shall maintain at least one demand
deposit  account  with First Union for purposes of this  Agreement.  AeroCentury
authorizes  First Union (but First Union shall not be obligated) to deposit into
said account all amounts to be advanced to  AeroCentury  hereunder.  AeroCentury
authorizes  First Union (but First Union shall not be  obligated) to deduct from
said account,  or any other account maintained by AeroCentury at First Union, as
the Agent,  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.

     2.9. Change in Circumstances, Yield Protection.

     (a) Certain Regulatory  Changes.  If any Regulatory Change or compliance by
the Banks 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 Banks;  (ii) impose on the Banks any other condition  regarding
the Notes; (iii) subject the Banks 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 tax not currently causing the Banks
to be subject to withholding) or any other levy,  impost,  duty,  charge, fee or
deduction on or from any payments due from AeroCentury; or (iv) change the basis
of taxation of payments from AeroCentury to the Banks (other than by reason of a
change in the method of taxation of a Bank's net income);  and the result of any
of the  foregoing  events  is to  increase  the  cost  to a Bank  of  making  or
maintaining  any Loan or to reduce the amount of principal,  interest or fees to
be  received  by the Bank  hereunder  in respect of any Loan,  First  Union will
immediately so notify  AeroCentury.  If a 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 First
Union  to  AeroCentury,  AeroCentury  shall  pay to such  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 any 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 such 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 such Bank's
capital as a  consequence  of its  obligations  hereunder  to a level below that
which such Bank could have achieved but for such adoption,  change or compliance
(taking  into  consideration  such  Bank's  policies  with  respect  to  capital
adequacy)  by an amount  deemed by such Bank to be material,  AeroCentury  shall
promptly  pay to First  Union for the  account of such Bank,  upon the demand of
such Bank,  such  additional  amount or amounts as will compensate such Bank for
such reduction.

<PAGE>

     (c) Ability to Determine LIBO Rate. If First Union shall  determine (which
determination  will be made after consultation with any Bank requesting same and
shall 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  the 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,  First Union  shall give notice of such  inability  or  determination  by
telephone to  AeroCentury  and to each Bank at least two Business  Days prior to
the date of the proposed  Loan and  thereupon  the  obligations  of the Banks to
make,  convert  other  Loans to, or renew such LIBO Rate Loan shall be  excused,
subject,  however,  to the right of AeroCentury at any time thereafter to submit
another request.

     (d) Yield  Protection.  Determination  by a 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
such 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 such Bank and
delivered  to  AeroCentury,  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.

     (e) Notice of Events.  The  affected  Bank will notify  AeroCentury  of any
event  occurring after the date of this Agreement that will entitle such 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.  AeroCentury  shall pay such Bank the
amount shown as due on such notice within 10 days after its receipt of the same.

     2.10. 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 Banks 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 Banks to (1)
maintain their  Revolving Loan  Commitments,  then upon notice to AeroCentury by
First Union, the Revolving Loan Commitments shall terminate;  or (2) maintain or
fund their LIBO Rate Loans,  then upon notice to the Borrower of such event, the
Borrower's outstanding LIBO Rate Loans shall be converted into Base Rate Loans.

     2.11.  Discretion  of Bank as to Manner  of  Funding.  Notwithstanding  any
provision of this Agreement to the contrary, each Bank shall be entitled to fund
and  maintain  its funding of all or any part of its Loans in any manner it sees
fit, it being understood,  however,  that for the purposes of this Agreement all
determinations  hereunder  shall be made as if each Bank had actually funded and
maintained each LIBO Rate Loan during each Interest Period for such Loan through
the  purchase of deposits in the  relevant  interbank  market  having a maturity
corresponding  to such Interest Period and bearing an interest rate equal to the
LIBO Rate plus 200 basis points (2.0%), for such Interest Period.


<PAGE>

                        3. Representations and Warranties
 
     AeroCentury represents and warrants to the Banks that:

     3.1. Organization Standing. It (i) is a corporation duly organized, validly
existing  and in  good  standing  under  the  laws  of the  jurisdiction  of its
incorporation,  (ii) has the corporate power and authority  necessary to own its
assets,  carry on its  business  and  enter  into and  perform  its  obligations
hereunder,  under  each  Loan  Document  to which it is a  party,  and  (iii) is
qualified to do business and is in good standing in each jurisdiction  where the
nature  of  its  business  or the  ownership  of its  properties  requires  such
qualification,  except  where the  failure to be so  qualified  would not have a
Material Adverse Effect.

     3.2. Corporate Authority, Validity, Etc. The making and performance of the
Loan  Documents  to which it is a party are within its power and  authority  and
have been duly  authorized by all  necessary  corporate  action.  The making and
performance  of the Loan Documents do not and under present law will not require
any  consent  or  approval  of any of  AeroCentury's  shareholders  or any other
person, do not and under present law will not violate any law, rule,  regulation
order,  writ,  judgment,  injunction,  decree,  determination  or award,  do not
violate any  provision of its charter or by-laws,  do not and will not result in
any  breach of any  material  agreement,  lease or  instrument  to which it is a
party, by which it is bound or to which any of its assets are or may be subject,
and do not and will not give rise to any Lien upon any of its assets. The number
of shares and  classes of the capital  stock of  AeroCentury  and the  ownership
thereof are accurately set forth on Schedule 1 attached hereto;  all such shares
are validly  issued,  fully paid and  non-assessable,  and the issuance and sale
thereof are in compliance with all applicable  federal and state  securities and
other applicable  laws.  AeroCentury is not in default under any such agreement,
lease or instrument except to the extent such default  reasonably could not have
a Material Adverse Effect. No  authorizations,  approvals or consents of, and no
filings or  registrations  with,  any  governmental  or regulatory  authority or
agency are necessary for the  execution,  delivery or performance by AeroCentury
of  any  Loan  Document  to  which  it  is  a  party  or  for  the  validity  or
enforceability thereof. Each Loan Document, when executed and delivered, will be
the legal, valid and binding obligation of AeroCentury  enforceable against each
in accordance with its terms.

     3.3.  Litigation.  Except as disclosed on Schedule 1, there are no actions,
suits or proceedings  pending  or,  to its  knowledge,  threatened  against  or
affecting it or any of its assets before any court,  government agency, or other
tribunal which if adversely determined  reasonably could have a Material Adverse
Effect or upon the ability of it to perform under the Loan  Documents.  If there
is any disclosure on Schedule 1, the status (including the tribunal,  the nature
of the claim and the amount in controversy) of each such litigation matter as of
the date of this Agreement is set forth in Schedule 1.

     3.4.  ERISA.  (a) AeroCentury and each ERISA Affiliate are in compliance in
all  material  respects  with  all  applicable   provisions  of  ERISA  and  the
regulations  promulgated  thereunder;  and, neither  AeroCentury,  nor any ERISA
Affiliate  maintains or  contributes  to or has maintained or contributed to any
multiemployer plan (as defined in Section 4001 of ERISA) under which AeroCentury
or any  ERISA  Affiliate  could  have  any  withdrawal  liability;  (b)  neither
AeroCentury nor any ERISA Affiliate,  sponsors or maintains any Plan under which
there is an accumulated  funding deficiency within the meaning of Section 412 of
the Code,  whether  or not  waived;  (c) the  aggregate  liability  for  accrued
benefits  and  other  ancillary  benefits  under  each  Plan  that is or will be
sponsored or maintained by AeroCentury or any ERISA Affiliate (determined on the
basis  of the  actuarial  assumptions  prescribed  for  valuing  benefits  under
terminating  single-employer defined benefit plans under Title IV of ERISA) does
not exceed the aggregate fair market value of the assets under each such defined
benefit pension Plan; (d) the aggregate  liability of AeroCentury and each ERISA
Affiliate arising out of or relating to a failure of any Plan to comply with the
provisions of ERISA or the Code, will not have a Material  Adverse  Effect;  and
(e) there  does not exist any  unfunded  liability  (determined  on the basis of
actuarial assumptions utilized by the actuary for the plan in preparing the most
recent Annual  Report) of  AeroCentury  or any ERISA  Affiliate  under any plan,
program or arrangement providing post-retirement life or health benefits.

     3.5. Financial  Statements.  The financial  statements of AeroCentury as of
and for the Fiscal Years ending  December  31, 1997,  and the interim  financial
statements  for the three month period ended March 31, 1998,  consisting in each
case of a balance  sheet,  statement  of income,  a statement  of  shareholders'
equity, statement of cash flows, and accompanying notes to financial statements,
furnished to the Banks in connection  herewith,  present fairly, in all material
respects, the financial position, and results of operations of AeroCentury as of
the dates and for the periods referred to, in conformity with Generally Accepted
Accounting  Principles.  Except as set forth on Schedule 1 hereto,  there are no
liabilities,  fixed or  contingent,  which are not  reflected in such  financial
statements,  other than  liabilities  which are not  required to be reflected in
such balance sheets.  There has been no Material  Adverse Change since March 31,
1998.

     3.6.  Not in  Default,  Judgments,  Etc.  No Event of Default or  Potential
Default under any Loan Document has occurred and is continuing.  AeroCentury has
satisfied  all  judgments  and is not in default with  respect to any  judgment,
writ,  injunction,  decree,  rule, or regulation  of any court,  arbitrator,  or
federal, state, municipal,  or other governmental authority,  commission,  board
bureau, agency, or instrumentality, domestic or foreign.

     3.7. Taxes. AeroCentury has filed all federal, state, local and foreign tax
returns  and  reports  which it is  required  by law to file and as to which its
failure to file would have a Material  Adverse  Effect,  and has paid all taxes,
including wage taxes,  assessments,  withholdings and other governmental charges
which are  presently due and payable,  other than those being  contested in good
faith by appropriate  proceedings,  if any, and disclosed on Schedule 1. The tax
charges,  accruals and reserves on the books of AeroCentury  are adequate to pay
all such taxes that have accrued but are not presently due and payable.

     3.8. Permits,  Licenses, Etc. AeroCentury possesses all permits,  licenses,
franchises,  trademarks,  trade names,  copyrights and patents  necessary to the
conduct of its  business as presently  conducted or as presently  proposed to be
conducted,  except  where  the  failure  to  possess  the same  would not have a
Material Adverse Effect.

     3.9.  Compliance  with  Laws,  Etc.  AeroCentury  is in  compliance  in all
material  respects with all  Regulations  applicable to its business  (including
obtaining all authorizations,  consents, approvals, orders, licenses, exemptions
from, and making all filings or registrations or qualifications  with, any court
or governmental department, public body or authority, commission, board, bureau,
agency, or instrumentality),  the noncompliance with which reasonably could have
a Material Adverse Effect.

     3.10. Solvency. AeroCentury is, and after giving effect to the transactions
contemplated hereby, will be, Solvent.

<PAGE>

     3.11. No Burdensome Agreements.  AeroCentury is not subject to any charter,
corporate or other legal restriction,  or any judgment,  decree,  order, rule or
regulation which in the judgment of its directors or officers has or is expected
in the future to have a materially  adverse effect on its operations,  business,
assets, liabilities or upon the ability of AeroCentury to perform under the Loan
Documents.  AeroCentury is not a party to any contract or agreement which in the
judgment of its directors or officers has or is expected to have any  materially
adverse  effect on its  business,  except as  otherwise  reflected  in  adequate
reserves.

     3.12. Subsidiaries, Etc. AeroCentury has no Subsidiaries except for special
purpose  entities formed in connection with financings which are non-recourse to
AeroCentury.  Set forth in Schedule 1 hereto is a complete and correct  list, as
of the  date of  this  Agreement,  of all  special  purpose  entities  owned  by
AeroCentury  and all  Investments  held by  AeroCentury  in any joint venture or
other Person.

     3.13.  Title to Properties, Leases.  AeroCentury  has good and marketable
title  to all  assets  and  properties  reflected  as  being  owned by it in its
financial statements as well as to all assets and properties acquired since said
date  (except  property  disposed of since said date in the  ordinary  course of
business).  Except  for the Liens set forth in  Schedule  1 hereto and any other
Permitted Liens, there are no Liens on any of such assets or properties.  It has
the right to, and does,  enjoy  peaceful and  undisturbed  possession  under all
material leases under which it is leasing property as a lessee.  All such leases
are valid,  subsisting and in full force and effect,  and none of such leases is
in default,  except where such default, either individually or in the aggregate,
could not have a Material Adverse Effect.

     3.14. Public Utility Holding Company;  Investment  Company.  AeroCentury is
not a "public utility company" or a "holding company", or a "subsidiary company"
of a  "holding  company",  or an  "affiliate"  of a  "holding  company"  or of a
"subsidiary  company" of a "holding  company",  as such terms are defined in the
Public Utility  Holding Company Act of 1935, as amended;  or a "public  utility"
within the meaning of the Federal Power Act, as amended. Further, AeroCentury is
not an "investment company" or an "affiliated person" of an "investment company"
or a company  "controlled" by an "investment  company" as such terms are defined
in the Investment Company Act of 1940, as amended.

     3.15. Margin  Stock.AeroCentury  is not and will not be engaged principally
or as one of its important  activities  in the business of extending  credit for
the purpose of  purchasing or carrying or trading in any margin stocks or margin
securities  (within the meaning of Regulation U of the Board of Governors of the
Federal Reserve System as amended from time to time).  AeroCentury  will not use
or permit any proceeds of the Loans to be used,  either  directly or indirectly,
for the  purpose,  whether  immediate,  incidental  or  ultimate,  of  buying or
carrying margin stocks or margin securities.

     3.16. Use of Proceeds. AeroCentury will use the proceeds of each Loan to be
made pursuant  hereto for the purchase or financing of Equipment to be leased to
unaffiliated persons and the warehouse financing of the lease of that Equipment.

     3.17.  Depreciation  Policies.  AeroCentury's current depreciation policies
are as set forth in Exhibit F. These policies have been in effect without change
since January 1, 1997.

     3.18.  Disclosure  Generally.  The  representations  and statements made by
AeroCentury  or on its behalf in  connection  with this credit  facility and the
Loans,  including  representations and statements in each of the Loan Documents,
do not and will not contain any untrue  statement of a material  fact or omit to
state a material fact or any fact necessary to make the representations made not
materially  misleading.  No written information,  exhibit,  report,  brochure or
financial  statement  furnished by  AeroCentury  or on its behalf to the Bank in
connection with this credit facility,  the Loans, or any Loan Document  contains
or will  contain any material  misstatement  of fact or omit to state a material
fact or any  fact  necessary  to  make  the  statements  contained  therein  not
misleading.


                             4. Conditions Precedent

     4.1. All Loans. The obligation of each Bank to make any Loan (including but
not limited to the first Loan hereunder) is conditioned upon the following:

     (a)  Documents.  AeroCentury  shall have  delivered and the Bank shall have
received a Request for Advance in such form as First Union may request from time
to time.

     (b) Borrowing Base Certificate.  AeroCentury shall have delivered and First
Union shall have  received a Borrowing  Base  Certificate  dated the date of the
Loan requested under this Agreement.

     (c) Convenants;  Representations.  AeroCentury  shall be in compliance with
all  covenants,  agreements  and  conditions  in each  Loan  Document  and  each
representation  and warranty  contained in each Loan Document shall be true with
the same effect as if such  representation or warranty had been made on the date
such Loan is made or issued.

     (d)  Defaults.  Immediately  prior  to and  after  giving  effect  to  such
transaction, no Event of Default or Potential Default shall exist.

     (e) Material  Adverse  Change.  Since March 31, 1998,  there shall not have
been any Material  Adverse Change with respect to  AeroCentury,  and there shall
not be any other event or circumstance which gives First Union, as the Agent, or
any Bank reasonable  grounds to conclude that AeroCentury may not or will not be
able to perform or observe (in the normal course) its obligations  hereunder and
under the Notes or the other Loan Documents.

     4.2.  Conditions  to the First Loan.  In addition to the  conditions to all
Loans as provided in Section 4.1, the  obligation of each Bank to make the first
Loan is conditioned upon the following:

     (a) Articles, Bylaws. Each Bank shall have received copies of the Articles
or  Certificate  of  Incorporation  and Bylaws of  AeroCentury  certified by its
Secretary or Assistant  Secretary;  together with  Certificate  of Good Standing
from any  jurisdiction  where the nature of its business or the ownership of its
properties  requires  such  qualification  except  where  the  failure  to be so
qualified would not have a Material Adverse Effect.

<PAGE>

     (b)  Evidence  of  Authorization.  Each Bank  shall  have  received  copies
certified by the Secretary or Assistant  Secretary of  AeroCentury  or any other
appropriate  official  (in the case of a Person other than  AeroCentury)  of all
corporate  or other  action  taken by each Person  other than the Banks who is a
party  to any  Loan  Document  to  authorize  its  execution  and  delivery  and
performance of the Loan Documents and to authorize the Loans, together with such
other related papers as First Union, as the Agent, shall reasonably require.

     (c) Legal  Opinions.  Each Bank shall have  received  a  favorable  written
opinion  in form and  substance  satisfactory  to the Bank from  Christopher  B.
Tigno,  Esq.,  General Counsel to  AeroCentury,  which shall be addressed to the
Bank and be dated the date of the first Loan.

     (d)  Incumbency.   First  Union,  as  the  Agent,  shall  have  received  a
certificate  signed by the  secretary  or  assistant  secretary  of  AeroCentury
together  with the true  signature  of the  officer or  officers  authorized  to
execute and deliver the Loan Documents and certificates  thereunder,  upon which
the Banks shall be entitled to rely conclusively  until it shall have received a
further  certificate  of the  secretary  or assistant  secretary of  AeroCentury
amending the prior  certificate  and  submitting the signature of the officer or
officers named in the new certificate as being authorized to execute and deliver
Loan Documents and certificates thereunder.

     (e) Notes.  Each Bank shall have  received  a  Revolving  Credit  Note duly
executed, completed and issued in accordance herewith.

     (f)  Documents.  First  Union,  as  the  Agent,  shall  have  received  all
certificates,  instruments  and other  documents  then  required to be delivered
pursuant  to any  Loan  Documents,  in  each  instance  in  form  and  substance
reasonably satisfactory to it.

     (g)  Consents. AeroCentury  shall  have  provided  to  each  Bank  evidence
satisfactory to it that all  governmental,  shareholder and third party consents
and approvals necessary in connection with the transactions  contemplated hereby
have been obtained and remain in effect.

     (h) Other  Agreements.  AeroCentury  shall have executed and delivered each
other Loan Document required hereunder.

     (i) Fees, Expenses. AeroCentury shall simultaneously pay or shall have paid
all fees and expenses due hereunder or any other Loan Document.

     (j)  JMC  Subordination  Agreegment.   Each  Bank  shall  have  received  a
subordination  agreement signed by JMC and in form and substance satisfactory to
the Banks whereby JMC agrees to  subordinate  at any time an Event of Default as
provided in Section  8.1(a)  hereof shall exist and for so long as such Event of
Default shall exist a percentage of its right to receive management fees payable
to it at any time and from time to time,  said  percentage  to be the greater of
(1) 50% of said fees,  or (2) that  percentage  which  results from dividing the
Loans outstanding hereunder by the Borrowing Base.


                            5. Affirmative Covenants

     AeroCentury covenants and agrees that, without the prior written consent of
the Required Banks,  from and after the date hereof and so long as the Revolving
Loan Commitments are in effect or any Obligation  remains unpaid or outstanding,
it will:


<PAGE>

     5.1.  Financial  Statements and  Reports.Furnish to the Banks the following
financial information:

     (a) Annual  Statements.  As soon as available but no later than ninety (90)
days after the end of each Fiscal Year,  the balance sheet of  AeroCentury as of
the end of such  year  and the  prior  year in  comparative  form,  and  related
statements of income,  shareholders'  equity, and cash flows for the Fiscal Year
and the prior Fiscal Year in comparative form. The financial statements shall be
in reasonable  detail with appropriate  notes and be prepared in accordance with
Generally Accepted Accounting Principles.  The annual financial statements shall
be certified  (without any qualification or exception) by Arthur Andersen LLP or
other  independent  public  accountants  acceptable to the Required Banks.  Such
financial  statements  shall  be  accompanied  by a report  of such  independent
certified public  accountants  stating that, in the opinion of such accountants,
such  financial  statements  present  fairly,  in  all  material  respects,  the
financial  position,  and the  results  of  operations  and the  cash  flows  of
AeroCentury  for the period then ended in  conformity  with  Generally  Accepted
Accounting  Principles,  except for  inconsistencies  resulting  from changes in
accounting principles and methods agreed to by such accountants and specified in
such report, and that, in the case of such financial statements, the examination
by such  accountants  of such  financial  statements has been made in accordance
with generally accepted auditing standards and accordingly  included  examining,
on a  test  basis,  evidence  supporting  the  amounts  and  disclosures  in the
financial   statements  and  assessing  the  accounting   principles   used  and
significant  estimates  made,  as  well  as  evaluating  the  overall  financial
statement presentation.  Each financial statement provided under this subsection
(a) shall be  accompanied  by a certificate  signed by such  accountants  either
stating  that  during  the  course of their  examination  nothing  came to their
attention  which would cause them to believe  that any event has occurred and is
continuing  which  constitutes  an Event of Default  or  Potential  Default,  or
describing  each such event.  In addition  to the annual  financial  statements,
AeroCentury shall, promptly upon receipt thereof,  furnish to the Bank a copy of
each  other  report  submitted  to its  board of  directors  by its  independent
accountants in connection with any annual, interim or special audit made by them
of the financial records of AeroCentury.

     (b) Quarterly Statements. As soon as available but no later than sixty (60)
calendar  days after the end of each  Fiscal  Quarter of each Fiscal  Year,  the
balance sheet and related  statements of income,  shareholders'  equity and cash
flows of  AeroCentury  for such  quarterly  period and for the  period  from the
beginning  of  such  fiscal  year  to  the  end of  such  Fiscal  Quarter  and a
corresponding  financial  statement for the same periods in the preceding Fiscal
Year, certified by the chief executive officer, chief operating officer or chief
financial  officer of  AeroCentury  as having been prepared in  accordance  with
Generally  Accepted  Accounting  Principles  (subject to changes  resulting from
audits and year-end  adjustments);  provided,  however,  that if the independent
certified public  accountants  issue a review report on the quarterly  financial
statements of AeroCentury,  the financial statements required by this subsection
(b) shall be  accompanied  by a certificate  signed by such  accountants  either
stating  that  during  the  course of their  examination  nothing  came to their
attention  which would cause them to believe  that any event has occurred and is
continuing  which  constitutes  an Event of Default  or  Potential  Default,  or
describing each such event and the remedial steps being taken by AeroCentury.

<PAGE>

     (c) No Default.  Within sixty (60)  calendar  days after the end of each of
the first three  Fiscal  Quarters  of each  Fiscal  Year and within  ninety (90)
calendar  days after the end of each Fiscal  Year, a  certificate  signed by the
chief executive  officer,  chief operating officer or chief financial officer of
AeroCentury certifying that, to the best of such officer's knowledge,  after due
inquiry,  (i) AeroCentury  has  complied  with  all  covenants,  agreements  and
conditions  in each Loan  Document  and that each  representation  and  warranty
contained  in each Loan  Document  is true and  correct  with the same effect as
though each such  representation  and warranty had been made on the date of such
certificate  (except to the extent such  representation or warranty related to a
specific  prior date),  and (ii) no event has occurred and is  continuing  which
constitutes an Event of Default or Potential  Default,  or describing  each such
event and the remedial steps being taken by AeroCentury.

     (d) ERISA. All reports and forms filed with respect to all Plans, except as
filed in the normal  course of business  and that would not result in an adverse
action  to be taken  under  ERISA,  and  details  of  related  information  of a
Reportable Event, promptly following each filing.

     (e) Material  Changes.  Notification to First Union, as the Agent, and each
other  Bank,  of  any  litigation,   administrative  proceeding,  investigation,
business  development,  or change in financial  condition which could reasonably
have a Material Adverse Effect, promptly following its discovery.

     (f) Other  Information.  AeroCentury  will provide to First  Union,  as the
Agent,  and  each  other  Bank  all  shareholder  and  Securities  and  Exchange
Commission  notices,  reports  and  filings  and  any  material  press  releases
simultaneously  with filing  with the  Securities  and  Exchange  Commission  or
release, respectively. In addition, promptly, upon request by First Union or any
other  Bank  from  time to time  (which  may be on a  monthly  or other  basis),
AeroCentury  shall  provide such other  information  and reports  regarding  its
operations,  business affairs, prospects and financial condition as First Union,
as the Agent, or the Banks may reasonably request.

     (g) Borrowing Base Certificates.  In the event  AeroCentury shall not have
delivered a Borrowing Base  Certificate to the Banks during any calendar  month,
it will  deliver  to the  Banks,  no later  than 30 days  after  the end of such
calendar month as of the last day of the preceding  calendar  month, a Borrowing
Base Certificate signed by the chief executive officer, chief operating officer,
chief financial officer or a Senior Vice President of AeroCentury.

     (h) Covenant Compliance Certificate. AeroCentury will deliver to the Banks,
no later than 60 days  after  the end of each  calendar  quarter,  a  Covenant
Compliance Certificate.

     (i) Monthly  Lease  Portfolio  and  Receivables  Report.  AeroCentury  will
deliver  to the  Banks,  no later  than 30 days  after the end of each  calendar
month, a lease portfolio listing and lease receivables aging report (in form and
substance  reasonably  satisfactory  to First  Union)  applicable  to all leases
included in the Collateral.

     (j) Maintenace of Current Depreciation Policies.  AeroCentury will maintain
its  method  of  depreciating  its  assets  substantially  consistent  with past
practices  as set forth in  Exhibit F and will  promptly  notify the Bank of any
deviation from such practices.
 
     5.2. Corporate Existence. Preserve its corporate existence and all material
franchises, licenses, patents, copyrights, trademarks and trade names consistent
with good  business  practice;  and  maintain,  keep,  and  preserve  all of its
properties  (tangible and intangible)  necessary or useful in the conduct of its
business in good working order and condition, ordinary wear and tear excepted.

<PAGE>

     5.3. ERISA. Comply in all material respects with the provisions of ERISA to
the extent applicable to any Plan maintained for the employees of AeroCentury or
any ERISA  Affiliate;  do or cause to be done all such acts and things  that are
required to maintain the qualified  status of each Plan and tax exempt status of
each trust forming part of such Plan; not incur any material accumulated funding
deficiency  (within  the  meaning  of  ERISA  and  the  regulations  promulgated
thereunder),  or any material  liability to the PBGC (as  established by ERISA);
not permit any event to occur as described in Section 4042 of ERISA or which may
result in the imposition of a lien on its properties or assets; notify the Banks
in writing  promptly after it has come to the attention of senior  management of
AeroCentury of the assertion or threat of any "reportable  event" or other event
described in Section 4042 of ERISA  (relating to the soundness of a Plan) or the
PBGC's  ability  to assert a material  liability  against it or impose a lien on
its, or any ERISA  Affiliates',  properties or assets; and refrain from engaging
in any Prohibited  Transactions  or actions  causing  possible  liability  under
Section 5.02 of ERISA.

     5.4. Complaince with Regulations.  Comply in all material respects with all
Regulations  applicable to its business, the noncompliance with which reasonably
could have a Material Adverse Effect.

     5.5.  Conduct  of  Business;   Permits,  and  Approvals,   Compliance  with
Laws.Continue  to engage in an efficient and economical  manner in a business of
the same general type as conducted by it on the date of this Agreement; maintain
in full force and effect, its franchises, and all licenses, patents, trademarks,
trade names,  contracts,  permits,  approvals and other rights  necessary to the
profitable conduct of its business.

     5.6.  Maintenance of Insurance.  Maintain  insurance with financially sound
and reputable  insurance  companies or associations in such amounts and covering
such risks as are usually carried by companies  engaged in the same or a similar
business and similarly  situated,  which  insurance  may provide for  reasonable
deductibility from coverage thereof.

     5.7.  Payment of Debt;  Payment of Taxes, Etc.  Where the amount  involved
exceeds $250,000 or where the non-payment or non-discharge  would otherwise have
a Material Adverse Effect on AeroCentury or any of its assets:  promptly pay and
discharge  (a) all of its Debt in  accordance  with the terms  thereof;  (b) all
taxes,  assessments,  and governmental charges or levies imposed upon it or upon
its income and profits,  upon any of its property,  real,  personal or mixed, or
upon any part thereof,  before the same shall become in default;  (c) all lawful
claims for labor,  materials and supplies or otherwise,  which, if unpaid, might
become a lien or  charge  upon  such  property  or any part  thereof;  provided,
however,  that so long as AeroCentury  first notifies First Union, as the Agent,
of its  intention  to do  so,  AeroCentury  shall  not be  required  to pay  and
discharge any such Debt, tax,  assessment,  charge, levy or claim so long as the
failure  to so pay or  discharge  does not  constitute  or result in an Event of
Default or a Potential  Default hereunder and so long as no foreclosure or other
similar  proceedings shall have been commenced against such property or any part
thereof and so long as the validity  thereof shall be contested in good faith by
appropriate  proceedings  diligently  pursued and it shall have set aside on its
books adequate reserves with respect thereto.

     5.8.  Notice of Events.  Promptly  upon  discovery of any of the  following
events,  AeroCentury  shall provide  telephone  notice to First Union (confirmed
within three (3) calendar days by written notice),  describing the event and all
action AeroCentury proposes to take with respect thereto:

<PAGE>

     (a) an Event of Default or Potential  Default  under this  Agreement or any
other Loan Document;

     (b) any default or event of default  under a contract or contracts  and the
default or event of default  involves  payments by  AeroCentury  in an aggregate
amount equal to or in excess of $250,000;

     (c) a default or event of default under or as defined in any evidence of or
agreements  for  Indebtedness  for  Borrowed  Money  under  which  AeroCentury's
liability is equal to or in excess of $250,000,  singularly or in the aggregate,
whether or not an event of default  thereunder has been declared by any party to
such  agreement  or any event  which,  upon the  lapse of time or the  giving of
notice or both,  would  become an event of default  under any such  agreement or
instrument  or would  permit any party to any such  instrument  or  agreement to
terminate or suspend any  commitment to lend to  AeroCentury or to declare or to
cause  any such  indebtedness  to be  accelerated  or  payable  before  it would
otherwise be due;

     (d) the institution of, any material adverse determination in, or the entry
of any default  judgment or order or stipulated  judgment or order in, any suit,
action,   arbitration,   administrative  proceeding,   criminal  prosecution  or
governmental   investigation   against   AeroCentury  in  which  the  amount  in
controversy is in excess of $250,000, singularly or in the aggregate; or

     (e) any change in any Regulation, including, without limitation, changes in
tax laws and regulations, which would have a Material Adverse Effect.

     5.9. Inspection Rights;  Collateral  Appraisal.  At any time during regular
business hours and as often as requested of  AeroCentury by First Union,  permit
First  Union  or any  Bank,  or any  authorized  officer,  employee,  agent,  or
representative of any of them to examine and make abstracts from the records and
books of account of AeroCentury,  wherever located,  and to visit the properties
of  AeroCentury;   and  to  discuss  the  affairs,  finances,  and  accounts  of
AeroCentury with its chief executive  officer,  chief operating  officer,  chief
financial  officer or independent  accountants.  In addition,  First Union shall
cause an appraisal  and audit of the  Collateral  to be made  annually  with the
first such appraisal and audit expected to be made within 90 days after the date
hereof.  If no Event of  Default or  Potential  Default  shall be in  existence,
AeroCentury  shall  reimburse  First  Union for the  reasonable  expense  of the
Collateral appraisal and audit not to exceed $7,500 in any calendar year whether
the  examination  is performed by First Union or a third party approved by First
Union. If any inspection or collateral  appraisal and audit shall be made during
the continuance of a Potential Default or an Event of Default, AeroCentury shall
reimburse  First  Union  for  the  reasonable  expense  of  such  inspection  or
collateral appraisal and audit without limit. At all times, it is understood and
agreed by AeroCentury  that all expenses in connection  with any such inspection
which may be incurred by AeroCentury, any officers and employees thereof and the
attorneys  and  independent  certified  public  accountants  therefor  shall  be
expenses payable by AeroCentury and shall not be expenses of the Banks.

     5.10. Generally Accepted Accounting Principals.  Maintain books and records
at all times in accordance with Generally Accepted Accounting Principles.

<PAGE>

     5.11  Compliance with Materials Contracts.  It will comply in all material
respects with all obligations,  terms,  conditions and covenants, as applicable,
in all Debt applicable to it and all instruments and agreements related thereto,
and all other  instruments  and agreements to which it is a party or by which it
is bound or any of its  properties  is  affected  and in  respect  of which  the
failure to comply reasonably could have a Material Adverse Effect.

     5.12. Use of Proceeds.  AeroCentury  will use the proceeds of each Loan for
the purchase or financing of Equipment to be leased to unaffiliated  persons and
the warehouse financing of the lease of that Equipment.

     5.13. Further  Assurances.  Do such further acts and things and execute and
deliver to First Union, as the Agent, such additional  assignments,  agreements,
powers and instruments,  as the Banks may reasonably  require or reasonably deem
advisable  to carry into  affect the  purposes  of this  Agreement  or to better
assure and confirm unto the Banks their rights, powers and remedies hereunder.

     5.14.  Restrictive  Covenants  in  Other  Agreements.  In  the  event  that
AeroCentury  shall be or become  subject  to or  suffer  to exist any  agreement
pertaining  to Debt  which  contains  covenants  or  restrictions  that are more
restrictive  on it  than  the  covenants  and  restrictions  contained  in  this
Agreement,  each and  every  such  covenant  and  restriction  shall  be  deemed
incorporated  herein by reference as fully as if set forth herein for so long as
and in such form as such covenants or  restrictions  shall remain in effect.  If
and to the extent that any such covenant or  restriction  shall be  inconsistent
with or otherwise  be in conflict  with any  covenant or  restriction  set forth
herein  (other  than by reason of its being more  restrictive),  this  Agreement
shall govern.

                              6. Negative Covenants

     AeroCentury covenants and agrees that, without the prior written consent of
the Required Banks,  from and after the date hereof and so long as the Revolving
Loan Commitments are in effect or any Obligation  remains unpaid or outstanding,
it will not:

     6.1.  Merger,  Consolidation.   Merge  or  consolidate  with  or  into  any
corporation  except,  if no  Potential  Default or Event of  Default  shall have
occurred and be continuing either  immediately prior to or upon the consummation
of such  transaction,  any  Person  may be merged  into  AeroCentury  as long as
AeroCentury is the surviving entity.

     6.2. Senior Debt. Create, assume or permit to exist any Debt which is parri
passu with the Notes  except for Debt of an  Unrestricted  Subsidiary  for which
AeroCentury is not a guarantor in whole or in part or otherwise liable.

     6.3.  Liens.  Create,  assume  or  permit  to exist  any Lien on any of its
property or assets,  whether now owned or hereafter acquired, or upon any income
or profits therefrom, except Permitted Liens.

     6.4. Guarantees. Guarantee or otherwise in any way become or be responsible
for  indebtedness  or  obligations   (including  working  capital   maintenance,
take-or-pay  contracts) of any other Person,  contingently  or otherwise,  other
than  guarantees  in the nature of  performance  guarantees  which  arise in the
ordinary course of AeroCentury's business.

<PAGE>

     6.5.  Margin  Stock.  Use or permit any  proceeds  of the Loans to be used,
either directly or indirectly, for the purpose, whether immediate, incidental or
ultimate,  of buying or carrying margin stock within the meaning of Regulation U
of The Board of Governors of the Federal Reserve System, as amended from time to
time.

     6.6.  Acquisitions  and  Investments.  Except as may arise in the  ordinary
course of AeroCentury's aircraft leasing business, purchase or otherwise acquire
(including  without  limitation by way of share  exchange) any part or amount of
the capital stock or assets of, or make any Investments in any other Person;  or
enter into any new business  activities or ventures not directly  related to its
present business;  or create any Subsidiary,  except (a) it may acquire and hold
stock, obligations or securities received in settlement of debts (created in the
ordinary  course  of  business)  owing  to it,  (b)  it may  make  and  own  (i)
Investments in  certificates  of deposit or time deposits  having  maturities in
each case not exceeding one year from the date of issuance thereof and issued by
a Bank, or any FDIC-insured commercial bank incorporated in the United States or
any  state  thereof  having a  combined  capital  and  surplus  of not less than
$150,000,000,  (ii)  Investments  in  marketable  direct  obligations  issued or
unconditionally  guaranteed by the United States of America, any agency thereof,
or backed by the full faith and credit of the United States of America,  in each
case maturing within one year from the date of issuance or acquisition  thereof,
(iii)  Investments in commercial  paper issued by a corporation  incorporated in
the United States or any State  thereof  maturing no more than one year from the
date of issuance thereof and, at the time of acquisition, having a rating of A-1
(or  better) by  Standard  & Poor's  Corporation  or P-1 (or  better) by Moody's
Investors  Service,  Inc., and (iv) investments in money market mutual funds all
of the assets of which are  invested  in cash or  investments  described  in the
immediately preceding clauses (i), (ii) and (iii), (c) it may acquire all of the
outstanding  capital stock or assets of Jetfleet  Management Corp., a California
corporation  ("JMC"),  under substantially the terms and conditions set forth in
that  certain  Amended  and  Restated  Management   Agreement  (the  "Management
Agreement")  between  AeroCentury and JMC entered into as of April 23, 1998, and
(d) it may  acquire  and hold  capital  stock of or  interests  in  Unrestricted
Subsidiaries.

     6.7. Transfer of Assets; Nature of Business. Sell, transfer, pledge, assign
or otherwise  dispose of any of its assets unless such sale or disposition shall
be in the ordinary  course of its business for value  received;  or discontinue,
liquidate  or  change  in any  material  respect  any  substantial  part  of its
operations  or  business.  Sales of  individual  or small  groups of leases  and
related  equipment  from  time  to  time  and  sales  of  groups  of  leases  in
securitization   transactions   and  transfers  of  assets  in  connection  with
non-recourse financing transactions shall be deemed to be in the ordinary course
of the business of AeroCentury.  Notwithstanding the foregoing and provided that
no Potential  Default or Event of Default  shall have occurred and be continuing
either  immediately  prior  to or  upon  the  consummation  of any  transaction,
AeroCentury  may sell,  transfer  or  dispose of assets  constituting  up to ten
percent (10%) of its total assets during any period of twelve months.

     6.8.  Restricted  Payments.  Declare or pay any cash dividends or redeem or
retire any shares of the outstanding capital stock of AeroCentury.

     6.9. Accounting Change.  Make or permit any change in financial  accounting
policies or  financial  reporting  practices,  except as  required by  Generally
Accepted  Accounting  Principles or  regulations  of the Securities and Exchange
Commission, if applicable.

<PAGE>

     6.10. Transactions with Affiliates.  Enter into any transaction (including,
without limitation, the purchase, sale or exchange of property, the rendering of
any  services  or the payment of  management  fees) with any  Affiliate,  except
transactions  in  the  ordinary  course  of,  and  pursuant  to  the  reasonable
requirements  of its  business,  including the payment of standard and customary
brokerage  fees,   provided  such  transactions  are  in  good  faith  and  upon
commercially  reasonable  terms, . Sales of individual or small groups of leases
and  related  equipment  from  time to time and  sales of  groups  of  leases in
securitization  transactions  and/or  other  sales of assets to an  Unrestricted
Subsidiary  shall be deemed to be in the  ordinary  course  of the  business  of
AeroCentury.  Management  fees  paid to JMC in  accordance  with the  Management
Agreement as in effect on April 23, 1998 shall be permitted hereunder.

     6.11.  Restriction on Amendment of the  Agreement.  Enter into or otherwise
become  subject to or suffer to exist any  agreement  which would  require it to
obtain the  consent of any other  person as a  condition  to the  ability of the
Banks and AeroCentury to amend or otherwise modify this Agreement.


                             7. Financial Covenants

     AeroCentury covenants and agrees that from and after the date hereof and so
long as the Revolving Loan  Commitments are in effect or any Obligation  remains
unpaid or outstanding, it will maintain the following financial covenants:

     7.1. Minimum Tangible Net Worth. Tangible Net Worth will not at any time be
less  than  the sum of (i)  $13,500,000,  and (ii) Net  Income  for each  Fiscal
Quarter ending after March 31, 1998, without deduction for any net losses.

     7.2. Debt Service  Coverage  Ratio.  The ratio of EBTDA to Debt Service for
the four (4) most recently  ended  consecutive  Fiscal  Quarters will not at any
time be less than 1.1:1.  Until such time as four (4) actual Fiscal  Quarters of
AeroCentury  operations  shall have  occurred,  EBTDA shall be  determined on an
annualized basis using the actual Fiscal Quarters which have elapsed.

     7.3.  Debt to  Tangible  Net  Worth.  The  ratio  of Debt  (including  Debt
represented  by the Notes) to  Tangible  Net Worth  will not at any time  exceed
3.0:1.

     7.4.  Absence  of Net Loss.  It will not  suffer a net loss for any  Fiscal
Quarter.

     7.5.  Borrowing Base. The aggregate  principal amount of Loans  outstanding
shall not at any time exceed the Borrowing Base or the Aggregate  Revolving Loan
Commitment,  whichever is less; provided,  however, that this covenant shall not
be deemed  breached if, at the time such  aggregate  amount  exceeds said level,
within three Business Days after the earlier of the date  AeroCentury  first has
knowledge  of such  excess or the date of the next  Borrowing  Base  Certificate
disclosing the existence of such excess,  a prepayment of Loans shall be made in
an amount  sufficient to assure  continued  compliance with this covenant in the
future.


                                   8. Default

     8.1. Events of Default.  AeroCentury shall be in default if any one or more
of the following events (each an "Event of Default") occurs:

<PAGE>

     (a) Payments.  AeroCentury fails to pay (1) any principal of or interest on
the Notes when due and payable  (whether at maturity,  by notice of intention to
prepay,  or otherwise),  or (2) any other amount payable under any Loan Document
when it is due and payable, and such failure shall continue in either case for a
period of five Business Days or more.

     (b)  Covenants.  AeroCentury  fails to  observe  or  perform  (1) any term,
condition  or covenant set forth in Sections  5.1(a),  5.1(b),  5.1(c),  5.1(g),
5.1(h) or 5.1(j),  Section 5.2 (first clause  only),  all sections of Articles 6
and 7 or Section  8.1(a) of this  Agreement,  as and when  required,  or (2) any
term,  condition  or  covenant  contained  in this  Agreement  or any other Loan
Document  other than as set forth in (1) above,  as and when  required  and such
failure shall continue for a period of 10 Business Days or more.

     (c)  Representations,  Warranties.  Any  representation or warranty made or
deemed  to be made by  AeroCentury  herein  or in any  Loan  Document  or in any
exhibit,  schedule,  report or certificate  delivered pursuant hereto or thereto
shall prove to have been false,  misleading or incorrect in any material respect
when made or deemed to have been made.

     (d) Bankruptcy. AeroCentury is dissolved or liquidated, makes an assignment
for the benefit of creditors,  files a petition in  bankruptcy,  is  adjudicated
insolvent or bankrupt,  petitions or applies to any tribunal for any receiver or
trustee,  commences  any  proceeding  relating to itself  under any  bankruptcy,
reorganization,  readjustment of debt, dissolution or liquidation law or statute
of any jurisdiction,  has commenced against it any such proceeding which remains
undismissed  for a period of sixty (60)  days,  or  indicates  its  consent  to,
approval  of or  acquiescence  in any such  proceeding,  or any  receiver  of or
trustee for AeroCentury or any  substantial  part of the property of AeroCentury
is appointed,  or if any such receivership or trusteeship continues undischarged
for a period of sixty (60) days.

     (e)  Certain  Other  Defaults.  AeroCentury  shall fail to pay when due any
Indebtedness for Borrowed Money which  singularly  exceeds  $250,000,  or in the
aggregate  exceeds  $250,000,   and  such  failure  shall  continue  beyond  any
applicable  cure  period,  or  AeroCentury  shall suffer to exist any default or
event of default in the  performance  or  observance,  subject to any applicable
grace period, of any agreement,  term, condition or covenant with respect to any
agreement or document  relating to Indebtedness for Borrowed Money if the effect
of such  default is to  permit,  with the giving of notice or passage of time or
both,  the  holders  thereof,  or any  trustee  or agent  for said  holders,  to
terminate or suspend any commitment  (which is equal to or in excess of $250,000
in any  individual  case or $250,000 in the aggregate) to lend money or to cause
or declare any portion of any  borrowings  thereunder  to become due and payable
prior to the date on which it would otherwise be due and payable,  provided that
during any  applicable  cure  period the Banks'  obligations  hereunder  to make
further Loans shall be suspended.

     (f) Judgments.  Any judgments against  AeroCentury or against its assets or
property for amounts in excess of  $1,000,000 in the  aggregate  remain  unpaid,
unstayed  on appeal,  undischarged,  unbonded  and  undismissed  for a period of
thirty (30) days.

<PAGE>

     (g)   Attachements.   Any  assets  of  AeroCentury   shall  be  subject  to
attachments,  levies, or garnishments for amounts in excess of $1,000,000 in the
aggregate  which have not been  dissolved or satisfied  within  thirty (30) days
after service of notice thereof to AeroCentury.

     (h) Change in  Management.  Neal D.  Crispin,  Toni M.  Perazzo and Marc J.
Anderson shall cease to be executive  officers of AeroCentury or JMC shall cease
to be the management  company for  AeroCentury as contemplated by the Management
Agreement dated as of April 23, 1998.

     (i) Security Interests.  Any security interest created pursuant to any Loan
Document  shall  cease to be in full  force and  effect,  or shall  cease in any
material  respect to give the Bank,  the Liens,  rights,  powers and  privileges
purported to be created  thereby  (including,  without  limitation,  a perfected
security interest in, and Lien on, all of the Collateral), superior to and prior
to the rights of all third  Persons,  and subject to no other  Liens  (except as
permitted by Section 6.2, 6.3).

     (j)  Material  Adverse  Change.  Any  Material  Adverse  Change  shall have
occurred.

     THEN and in every such event other than that specified in Section  8.1.(d),
First Union as Agent may, or at the written request of the Required Banks shall,
immediately  terminate the Revolving Loan  Commitments and declare the Notes and
all other Obligations, including without limitation accrued interest, to be, and
they shall  thereupon  forthwith  become due and  payable  without  presentment,
demand,  or notice of any kind,  all of which  are  hereby  expressly  waived by
AeroCentury.  Upon the occurrence of any event specified in Section 8.1.(d), the
Revolving Loan Commitments shall  automatically  terminate and the Notes and all
other  Obligations,   including  without  limitation  accrued  interest,   shall
immediately be due and payable  without  presentment,  demand,  protest or other
notice of any kind, all of which are hereby expressly waived by AeroCentury. Any
date on which the Notes and such other  obligations are declared due and payable
pursuant to this Section 8.1 shall be Revolver  Termination Date for purposes of
this Agreement.  From and after the date an Event of Default shall have occurred
and for so long as an Event of Default shall be continuing, the Loans shall bear
interest at the Default  Rate whether or not a Revolver  Termination  Date shall
have occurred.

<PAGE>

                                    9. Agent


     9.1.  Appointment and Authorization.  Each Bank hereby irrevocably appoints
and authorizes  First Union,  as Agent, to take such action on its behalf and to
exercise  such  powers  under  this  Agreement  and the  Loan  Documents  as are
specifically  delegated to it as Agent by the terms hereof or thereof,  together
with such other powers as are reasonably  incidental  thereto.  The relationship
between  First Union and each Bank has no  fiduciary  aspects,  and First Union'
duties  as Agent  hereunder  are  acknowledged  to be only  ministerial  and not
involving the exercise of discretion on its part.  Nothing in this  Agreement or
any Loan  Document  shall be  construed  to impose on First  Union any duties or
responsibilities  other than those for which express provision is made herein or
therein. In performing its duties and functions hereunder,  First Union does not
assume and shall not be deemed to have assumed,  and hereby expressly disclaims,
any obligation with or for AeroCentury. As to matters not expressly provided for
in this  Agreement  or any Loan  Document,  First Union shall not be required to
exercise any  discretion or to take any action or  communicate  any notice,  but
shall be fully  protected  in so  acting  or  refraining  from  acting  upon the
instructions of the Required Banks and their respective  successors and assigns;
provided,  however,  that in no event  shall First Union be required to take any
action  which  exposes it to  personal  liability  or which is  contrary to this
Agreement,  any Loan Document or applicable  law, and First Union shall be fully
justified  in failing or refusing to take any action  hereunder  unless it shall
first be specifically  indemnified to its  satisfaction by the Banks against any
and all liability and expense which may be incurred by it by reason of taking or
omitting to take any such action.  If an indemnity  furnished to First Union for
any  purpose  shall,  in its  reasonable  opinion,  be  insufficient  or  become
impaired,  First Union may call for additional  indemnity from the Banks and not
commence or cease to do the acts for which such  indemnity  is  requested  until
such additional indemnity is furnished.

     9.2.  Duties  and  Obligations.  In  performing  its  functions  and duties
hereunder on behalf of the Banks,  First Union shall  exercise the same care and
skill as it would  exercise in dealing with loans for its own  account.  Neither
First Union nor any of its directors,  officers, employees or other agents shall
be liable for any action  taken or omitted to be taken by it or them under or in
connection  with this Agreement or any Loan Document except for its or their own
gross negligence or willful  misconduct.  Without limiting the generality of the
foregoing,  First Union (a) may  consult  with legal  counsel and other  experts
selected  by it and shall not be liable  for any  action  taken or omitted to be
taken by it in good faith and in accordance with the advice of such experts; (b)
makes  no  representation  or  warranty  to any  Bank as to,  and  shall  not be
responsible to any Bank for, any recital, statement,  representation or warranty
made in or in  connection  with  this  Agreement,  any Loan  Document  or in any
written or oral  statement  (including  a  financial  or other such  statement),
instrument or other  document  delivered in connection  herewith or therewith or
furnished to any Bank by or on behalf of AeroCentury;  (c) shall have no duty to
ascertain or inquire into AeroCentury's  performance or observance of any of the
covenants  or  conditions  contained  herein or to inspect  any of the  property
(including  the books and records) of AeroCentury or inquire into the use of the
proceeds of the  Revolving  Credit  Loans or (unless the officers of First Union
active in their  capacity as officers  of First Union on  AeroCentury's  account
have  actual  knowledge  thereof or have been  notified  in writing  thereof) to
inquire  into the  existence  or possible  existence  of any Event of Default or
Potential  Default;  (d)  shall  not be  responsible  to any  Bank  for  the due
execution,  legality,  validity,  enforceability,   effectiveness,  genuineness,
sufficiency,  collectability  or  value  of this  Agreement  or any  other  Loan
Document or any instrument or document  executed or issued pursuant hereto or in
connection herewith,  except to the extent that such may be dependent on the due
authorization  and  execution  by First Union  itself;  (e) except as  expressly
provided  herein in respect of information and data furnished to First Union for
distribution  to the  Banks,  shall  have  no  duty  or  responsibility,  either
initially or on a continuing  basis,  to provide to any Bank any credit or other
information  with respect to  AeroCentury,  whether  coming into its  possession
before the making of the Loans or at any time or times thereafter; and (f) shall
incur no  liability  under or in  respect  of this  Agreement  or any other Loan
Document for, and shall be entitled to rely and act upon,  any notice,  consent,
certificate  or  other   instrument  or  writing  (which  may  be  by  facsimile
(telecopier),  telegram,  cable, or other electronic means) believed by it to be
genuine  and  correct  and to have been  signed or sent by the  proper  party or
parties.

<PAGE>

     9.3. First Union as a Bank.  With respect to its Revolving Loan  Commitment
and the Loans made and to be made by it,  First Union shall have the same rights
and powers under this  Agreement and all other Loan Documents as the other Banks
and may  exercise  the same as if it were not the  Agent.  The terms  "Bank" and
"Banks" as used herein shall,  unless  otherwise  expressly  indicated,  include
First Union in its  individual  capacity.  First Union and any  successor  Agent
which is a commercial bank, and their respective affiliates, may accept deposits
from, lend money to, act as trustee under  indentures of and generally engage in
any kind of business with, AeroCentury and its affiliates from time to time, all
as if such entity were not the Agent  hereunder  and without any duty to account
therefor to any Bank.

     9.4.  Independent Credit Decisions.  Each Bank acknowledges to First Union
that it has,  independently  and without  reliance upon First Union or any other
Bank,  and  based  upon  such  documents  and   information  as  it  has  deemed
appropriate, made its own independent credit analysis and decision to enter into
this  Agreement.  Each Bank also  acknowledges  that it will,  independently  or
through other advisers and representatives but without reliance upon First Union
or any other Bank,  and based upon such  documents and  information  as it shall
deem  appropriate  at the time,  continue  to make its own credit  decisions  in
taking or  refraining  from taking any action  under this  Agreement or any Loan
Document.

     9.5.  Indemnification.  The Banks  agree to  indemnify  First Union (to the
extent not previously reimbursed by AeroCentury),  ratably in proportion to each
Bank's  Commitment  Percentage,  from  and  against  any  and  all  liabilities,
obligations,  losses,  damages,  penalties,  actions,  judgments,  suits, costs,
expenses and disbursements of any kind or nature whatsoever which may be imposed
on, incurred by or asserted  against First Union in its capacity as Agent in any
way  relating to or arising out of this  Agreement  or any Loan  Document or any
action  taken or omitted  to be taken by First  Union in its  capacity  as Agent
hereunder or under any Loan  Document;  provided that none of the Banks shall be
liable  for any  portion  of such  liabilities,  obligations,  losses,  damages,
penalties, actions, judgments, suits, costs, expenses or disbursements resulting
from First Union' gross negligence or willful  misconduct.  Without limiting the
generality of the foregoing, each Bank agrees to reimburse First Union, promptly
on  demand,   for  such  Bank's   ratable   share  (based  upon  the   aforesaid
apportionment)  of  any  out-of-pocket  expenses  (including  counsel  fees  and
disbursements)  incurred  by First  Union in  connection  with the  preparation,
execution,  administration  or enforcement of, or the preservation of any rights
under,  this  Agreement and the Loan Documents to the extent that First Union is
not reimbursed for such expenses by AeroCentury.

     9.6.  Successor Agent. First Union may resign at any time by giving written
notice of such resignation to the Banks and AeroCentury,  such resignation to be
effective  only  upon  the  appointment  of a  successor  Agent  as  hereinafter
provided. Upon any such notice of resignation, the Banks shall jointly appoint a
successor  Agent upon  written  notice to  AeroCentury  and First  Union.  If no
successor  Agent shall have been jointly  appointed by such Banks and shall have
accepted such  appointment  within thirty (30) days after First Union shall have
given notice of resignation, First Union may, upon notice to AeroCentury and the
Banks,  appoint a successor  Agent.  Upon its  acceptance of any  appointment as
Agent hereunder, the successor Agent shall succeed to and become vested with all
the rights, powers,  privileges and duties of First Union, and First Union shall
be discharged  from its duties and obligations as Agent under this Agreement and
the Loan Documents.  After First Union'  resignation  hereunder,  the provisions
hereof shall inure to its benefit as to any actions taken or omitted to be taken
by it while it was the Agent under this Agreement and the Loan Documents.

<PAGE>

     9.7. Allocations Made By First Union. As between First Union, as Agent, and
the Banks,  unless a Bank  objecting to a  determination  or allocation  made by
First Union pursuant to this Agreement delivers to First Union written notice of
such  objection  within  one  hundred  twenty  (120)  days  after  the  date any
distribution was made by First Union, such  determination or allocation shall be
conclusive  on such one hundred  twentieth  day and only those  items  expressly
objected to in such notice  shall be deemed  disputed by such Bank.  First Union
shall not have any duty to  inquire  as to the  application  by the Banks of any
amounts distributed to them.


                                10. Miscellaneous

     10.1. Waiver. No failure or delay on the part of First Union or any Bank or
any holder of any Note in exercising  any right,  power or remedy under any Loan
Document  shall  operate  as a waiver  thereof;  nor shall any single or partial
exercise  of any such  right,  power or remedy  preclude  any  other or  further
exercise  thereof or the exercise of any other right,  power or remedy under any
Loan Document. The remedies provided under the Loan Documents are cumulative and
not exclusive of any remedies provided by law.

     10.2. Amendments. No amendment, modification,  termination or waiver of any
Loan  Document or any  provision  thereof nor any  consent to any  departure  by
AeroCentury  therefrom  shall be  effective  unless  the same  shall  have  been
approved in writing by the Required  Banks, be in writing and be signed by First
Union and  AeroCentury,  and then any such waiver or consent  shall be effective
only in the instance and for the specific  purpose for which given. No notice to
or demand on  AeroCentury  shall  entitle  AeroCentury  to any other or  further
notice or demand in similar or other  circumstances.  Notwithstanding  any other
provision   contained  in  any  Loan  Document,   no  amendment,   modification,
termination or waiver shall affect the payment of principal  (including  without
limitation  the date when  due),  reduce  any  interest  rate  margin or any fee
provided  herein,  increase any Revolving Loan  Commitment,  extend the Revolver
Termination Date, modify the definition of "Required Banks" or any voting rights
of the Banks  without  the  written  consent  of all the  Banks.  The rights and
responsibilities of First Union as the Agent hereunder cannot be changed without
its prior written consent.

     10.3.  Governing Law. The Loan Documents and all rights and  obligations of
the parties  thereunder  shall be governed by and be  construed  and enforced in
accordance with the laws of the  Commonwealth of Pennsylvania  without regard to
Pennsylvania or federal principles of conflict of laws.

<PAGE>

     10.4.  Participations and Assignments.  AeroCentury hereby acknowledges and
agrees  that any Bank may at any time:  (a) grant  participations  in all or any
portion of its Note or of its right, title and interest therein or in or to this
Agreement (collectively, "Participations") to any other lending office or to any
other  bank,  lending  institution  or  other  entity  which  has the  requisite
sophistication to evaluate the merits and risks of investments in Participations
("Participants");   provided,   however,   that:  (i)  all  amounts  payable  by
AeroCentury   shall  be  determined  as  if  such  Bank  had  not  granted  such
Participation;  and  (ii) any  agreement  pursuant  to which a Bank may  grant a
Participation;  (x) shall provide that such Bank shall retain the sole right and
responsibility  to enforce the  obligations  of AeroCentury  including,  without
limitation,  the right to approve any amendment,  modification  or waiver of any
provisions of this Agreement;  (y) such participation agreement may provide that
such  Bank  will not  agree to any  modification,  amendment  or  waiver of this
Agreement without the consent of the Participant if such modification, amendment
or waiver  would  reduce the  principal  of or rate of  interest  on any Loan or
postpone the date fixed for any payment of principal of or interest on any Loan;
and (z) shall not relieve  such Bank from its  obligations,  which shall  remain
absolute,  to make Loans hereunder;  and (b) each Bank may assign all or part of
its Note and its  Revolving  Credit  Commitment  (but only with the  consent  of
AeroCentury  and  First  Union,  as  the  Agent,  which  consent  shall  not  be
unreasonably withheld), provided that each such assignment shall be in an amount
of at least $1,000,000  (unless,  after giving effect to such assignment and all
other such  assignments  by such  assigning  Bank  occurring  simultaneously  or
substantially  simultaneously  therewith,  such  assigning  Bank  shall  hold no
Revolving Credit Commitment or any portion of its Note hereunder); and (ii) each
such assignment by a Bank of its Note or a portion thereof,  or Revolving Credit
Commitment  or a portion  thereof  shall be made in such manner so that the same
portion of its Loans,  Note and Revolving  Credit  Commitment is assigned to the
respective assignee.  Upon execution and delivery by the assignee to AeroCentury
and First Union,  as the Agent,  of an instrument  in writing  pursuant to which
such assignee agrees to become a "Bank" hereunder (if not already a Bank) having
the  Commitment(s)  and Note  interest  specified in such  instrument,  and upon
consent  thereto by  AeroCentury  and First Union,  as the Agent,  to the extent
required  above,  the  assignee  shall  have,  to the extent of such  assignment
(unless  otherwise  provided in such  assignment with the consent of AeroCentury
and First Union, as the Agent),  the obligations,  rights and benefits of a Bank
hereunder  holding the  Revolving  Credit  Commitment(s)  and Loans (or portions
thereof)  assigned to it (in addition to the Revolving Credit  Commitment(s) and
Note interest, if any, theretofore held by such assignee) and the assigning Bank
shall, to the extent of such assignment,  be released from the Commitment(s) (or
portion(s)  thereof) so assigned.  Upon each such  assignment the assigning Bank
shall pay First Union as the Agent an assignment fee of $3,000.

     10.5. Captions. Captions in the Loan Documents are included for convenience
of reference  only and shall not  constitute a part of any Loan Document for any
other purpose.

     10.6 Notices. All notices, requests, demands, directions,  declarations and
other communications  between the Banks and AeroCentury provided for in any Loan
Document shall, except as otherwise expressly provided,  be mailed by registered
or certified  mail,  return receipt  requested,  or  telegraphed,  or faxed,  or
delivered in hand to the applicable party at its address indicated  opposite its
name on the signature pages hereto.  The foregoing shall be effective and deemed
received  five (5) days after being  deposited  in the mails,  postage  prepaid,
addressed as aforesaid and shall whenever sent by telegram,  telegraph or fax or
overnight  courier service or delivered in hand be effective when received.  Any
party may change its address by a communication in accordance herewith.

     10.7.   Sharing  of   Collections,   Proceeds  and  Set-Offs;   Application
of Payments.

     (a) If any Bank,  by  exercising  any  right of  set-off,  counterclaim  or
foreclosure against trade collateral or otherwise, receives payment of principal
or interest or other amount due on any Note which is greater than the percentage
share of such Bank  (determined  as set forth below),  the Bank  receiving  such
proportionately  greater payment shall purchase such participations in the Loans
held by the other  Banks,  and such  other  adjustments  shall be made as may be
required, so that all such payments shall be shared by the Banks on the basis of
their  percentage  shares;   provided  that  if  all  or  any  portion  of  such
proportionately  greater payment of such  indebtedness  is thereafter  recovered
from, or must otherwise be restored by, such purchasing Bank, the purchase shall
be rescinded and the purchase price restored to the extent of such recovery, but
without  interest being paid by such  purchasing  Bank. The percentage  share of
each Bank shall be based on the  portion of the  outstanding  Loans of such Bank
(prior to receiving any payment for which an adjustment  must be made under this
Section  in  relation  to the  aggregate  outstanding  Loans  of all the  Banks.
AeroCentury  agrees,  to the  fullest  extent  it may  effectively  do so  under
applicable  law, that any holder of a participation  in a Loan or  reimbursement
obligation,  whether or not acquired pursuant to the foregoing arrangements, may
exercise rights of set-off or counterclaim and other rights with respect to such
participation  as  fully  as if such  holder  of a  participation  were a direct
creditor  of  AeroCentury  in the  amount  of such  participation.  If under any
applicable  bankruptcy,  insolvency  or other  similar law, any Bank  receives a
secured claim in lieu of a set-off to which this Section would apply,  such Bank
shall, to the extent practicable, exercise its rights in respect of such secured
claim in a manner  consistent  with the rights of the Banks  entitled under this
Section to share in the benefits of any recovery on such secured claim.

     (b) If an Event of Default or Potential  Default shall have occurred and be
continuing  the Agent and each Bank and  AeroCentury  agree that all payments on
account of the Loans shall be applied by the Agent and the Banks as follows:

     First,  to the Agent for any Agent  fees then due and  payable  under  this
Agreement until such fees are paid in full;

     Second,  to the Agent for any fees, costs or expenses  (including  expenses
described in Section 10.8) incurred by the Agent under any of the Loan Documents
or this Agreement, then due and payable and not reimbursed by AeroCentury or the
Banks until such fees, costs and expenses are paid in full;

     Third, to the Banks for their percentage  shares of the Commitment Fee then
due and payable under this Agreement until such fee is paid in full;

     Fourth, to the Banks for their respective shares of all costs, expenses and
fees then due and payable from AeroCentury  until such costs,  expenses and fees
are paid in full;

     Fifth,  to the Banks for their  percentage  shares of all interest then due
and  payable  from  AeroCentury  until  such  interest  is paid in  full,  which
percentage  shares shall be calculated  by  determining  each Bank's  percentage
share of the  amounts  allocated  in (a) above  determined  as set forth in said
clause (a); and

     Sixth, to the Banks for their percentage  shares of the principal amount of
the Loans then due and payable from AeroCentury  until such principal is paid in
full,  which  percentage  shares shall be calculated by determining  each Bank's
percentage  share of the amounts  allocated in (a) above determined as set forth
in said clause (a).

<PAGE>

     10.8.  Expenses;  Indemnification.  AeroCentury  will  from  time  to  time
reimburse First Union as the Agent promptly  following demand for all reasonable
out-of-pocket  expenses  (including  the  reasonable  fees and expenses of legal
counsel) in connection  with (i) the  preparation  of the Loan Documents (not to
exceed  $25,000),  (ii) the making of any  Loans,  (iii) the  administration  or
revision of the Loan Documents,  and (iv) the enforcement of the Loan Documents;
and  reimburse the Bank for all  reasonable  out-of-pocket  expenses  (including
reasonable   fees  and  expenses  of  legal  counsel)  in  connection  with  the
enforcement of the Loan  Documents.  In addition to the payment of the foregoing
expenses,  AeroCentury  hereby agrees to indemnify,  protect and hold the Agent,
each Bank and any holder of each Note and the  officers,  directors,  employees,
agents,  affiliates  and  attorneys  of the  Agent,  each  Bank and such  holder
(collectively,  the  "Indemnitees")  harmless  from  and  against  any  and  all
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
costs,  expenses and disbursements of any kind or nature,  including  reasonable
fees and  expenses of legal  counsel,  which may be imposed on,  incurred by, or
asserted against such Indemnitee by AeroCentury or other third parties and arise
out of or relate to this  Agreement  or the other  Loan  Documents  or any other
matter whatsoever related to the transactions  contemplated by or referred to in
this Agreement or the other Loan Documents;  provided, however, that AeroCentury
shall have no  obligation  to an  Indemnitee  hereunder  to the extent  that the
liability  incurred  by such  Indemnitee  has  been  determined  by a  court  of
competent  jurisdiction  to  be  the  result  of  gross  negligence  or  willful
misconduct of such Indemnitee.

     10.9.  Survival  of  Warranties  and  Certain  Agreement.  All  agreements,
representations  and  warranties  made or deemed made herein  shall  survive the
execution and delivery of this Agreement,  the making of the Loans hereunder and
the  execution  and  delivery  of the  Note.  Notwithstanding  anything  in this
Agreement or implied by law to the contrary,  the  agreements of  AeroCentury in
Sections 2.1(f), 2.5(b), 2.10 and 10.8 and the agreements of the Banks set forth
in  Sections  9.1,  9.5 and 10.8 shall  survive the payment of the Loans and the
termination of this  Agreement.  This  Agreement  shall remain in full force and
effect until the repayment in full of all amounts owed by AeroCentury  under the
Notes or any other Loan Document.

     10.10. Severability. The invalidity,  illegality or unenforceability in any
jurisdiction of any provision in or obligation  under this Agreement,  the Notes
or other Loan  Documents  shall not affect or impair the  validity,  legality or
enforceability of the remaining  provisions or obligations under this Agreement,
the Notes or other Loan  Documents  or of such  provision or  obligation  in any
other jurisdiction.

     10.11. Banks' Obligations Several; Independent Nature of Banks' Rights. The
obligation of each Bank  hereunder is several and not joint and no Bank shall be
the agent of any other  (except to the extent the Agent is  authorized to act as
such  hereunder).  No Bank shall be responsible for the obligation or commitment
of any other Bank hereunder.  In the event that any Bank at any time should fail
to make a Loan as herein  provided,  the other Banks, or any of them as may then
be agreed upon,  at their sole  option,  may make the Loan that was to have been
made by the Bank so  failing to make such Loan.  Nothing  contained  in any Loan
Document  and no action  taken by Agent or any Bank  pursuant  hereto or thereto
shall be deemed to constitute the Banks to be a partnership,  an association,  a
joint  venture  or any other  kind of entity.  The  amounts  payable at any time
hereunder to each Bank shall be a separate and independent debt, and, subject to
the terms of this Agreement,  each Bank shall be entitled to protect and enforce
its rights  arising out of this  Agreement and it shall not be necessary for any
other  Bank to be  joined  as an  additional  party in any  proceeding  for such
purpose.

     10.12. No Fiduciary Relationship. No provision in this Agreement or in any
of the other Loan  Documents and no course of dealing  between the parties shall
be deemed to create any fiduciary duty of any Bank to AeroCentury.

     10.13.  CONSENT TO JURISDICTION  AND SERVICE OF PROCESS.  AEROCENTURY,  THE
AGENT AND EACH BANK EACH  HEREBY  CONSENTS TO THE  JURISDICTION  OF ANY STATE OR
FEDERAL  COURT  LOCATED  WITHIN  THE  EASTERN   DISTRICT  OF  PENNSYLFANIA   AND
IRREVOCABLY  AGREES THAT, ANY ACTIONS OR PROCEEDINGS  ARISING OUT OF OR RELATING
TO THE NOTE, THIS AGREEMENT OR THE OTHER LOAN DOCUMENTS MAY BE LITIGATED IN SUCH
COURTS.  EACH PARTY TO THIS AGREEMENT  ACCEPTS FOR ITSELF AND IN CONNECTION WITH
ITS PROPERTIES, GENERALLY AND UNCONIDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF
THE  AFORESAID  COURTS  AND  WAIVES ANY  DEFENSE  OF FORUM NON  CONVENIENT,  AND
IRREVOCABLY  AGREES TO BE BOUND BY ANY JUDGMENT  RENDERED  THEREBY IN CONNECTION
WITH THIS AGREEMENT, ANY NOTE, OR SUCH OTHER LOAN DOCUMENT.

<PAGE>

     10.14.  WAIVER  OF JURY  TRAIL.  AEROCENTURY,  THE AGENT AND EACH BANK EACH
HEREBY CONSENTS TO THE JURISDICTION OF ANY STATE OR FEDERAL COURT LOCATED WITHIN
THE EASTERN DISTRICT OF PENNSYLVANIA AND IRREVOCABLY AGREES THAT, ANY ACTIONS OR
PROCEEDINGS  ARISING OUT OF OR RELATING TO THE NOTE, THIS AGREEMENT OR THE OTHER
LOAN  DOCUMENTS  MAY BE LITIGATED IN SUCH COURTS.  EACH PARTY TO THIS  AGREEMENT
ACCEPTS  FOR  ITSELF  AND IN  CONNECTION  WITH  ITS  PROPERTIES,  GENERALLY  AND
UNCONDITIONALLY,  THE  NONEXCLUSIVE  JURISDICTION  OF THE  AFORESAID  COURTS AND
WAIVES ANY DEFENSE OF FORUM NON CONVENIENT,  AND IRREVOCABLY  AGREES TO BE BOUND
BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION WITH THIS AGREEMENT, ANY NOTE, OR
SUCH OTHER LOAN DOCUMENT.

     AEROCENTURY,  THE AGENT AND EACH BANK EACH  HEREBY  WAIVES  ITS  RESPECTIVE
RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT
OF THIS  AGREEMENT,  ANY OF THE LOAN  DOCUMENTS,  OR ANY  DEALINGS  BETWEEN THEM
RELATING  TO THE  SUBJECT  MATTER  OF THIS  AGREEMENT  AND  THE  LENDER/BORROWER
RELATIONSHIP  ESTABLISHED  HEREBY.  THE SCOPE OF THIS  WAIVER IS  INTENDED TO BE
ALL-ENCOMPASSING OF ANY AND ALL DISPUTES THAT MAY BE FILED IN ANY COURT AND THAT
RELATE TO THE SUBJECT MATTER OF THIS TRANSACTION,  INCLUDING WITHOUT LIMITATION,
CONTRACT CLAIMS,  TORT CLAIMS,  BREACH OF DUTY CLAIMS,  AND ALL OTHER COMMON LAW
AND STATUTORY  CLAIMS.  AEROCENTURY,  THE AGENT AND EACH BANK EACH  ACKNOWLEDGES
THAT THIS  WAIVER IS A MATERIAL  INDUCEMENT  TO THE  TRANSACTION,  THAT EACH HAS
ALREADY  RELIED ON THE WAIVER IN ENTERING INTO THIS AGREEMENT AND THAT EACH WILL
CONTINUE TO RELY ON THE WAIVER IN THEIR RELATED  FUTURE  DEALINGS.  AEROCENTURY,
THE AGENT  AND EACH BANK EACH  FURTHER  WARRANTS  AND  REPRESENTS  THAT EACH HAS
REVIEWED  THIS  WAIVER  WITH ITS  LEGAL  COUNSEL,  AND THAT EACH  KNOWINGLY  AND
VOLUNTARILY  WAIVES  ITS JURY TRIAL  RIGHTS  FOLLOWING  CONSULTATION  WITH LEGAL
COUNSEL.  THIS  WAIVER  IS  IRREVOCABLE,  AND  THE  WAIVER  SHALL  APPLY  TO ANY
SUBSEQUENT AMENDMENTS,  RENEWALS,  SUPPLEMENTS,  MODIFICATIONS,  REPLACEMENTS OR
RESTATEMENTS TO THIS AGREEMENT, THE LOAN DOCUMENTS, OR TO ANY OTHER DOCUMENTS OR
AGREEMENTS RELATING TO THE LOANS. IN THE EVENT OF LITIGATION, THIS AGREEMENT MAY
BE FILED AS A WRITTEN CONSENT TO A TRIAL BY THE COURT.

     10.15. Counterparts; Effectiveness. This Agreement and any amendment hereto
or waiver  hereof  may be signed in any  number of  counterparts,  each of which
shall be an  original,  with the same  effect as if the  signatures  thereto and
hereto were upon the same instrument.  This Agreement and any amendments  hereto
or waivers  hereof shall  become  effective  when the Agent shall have  received
signed  counterparts or notice by fax of the signature page that the counterpart
has been signed and is being delivered to it or facsimile that such counterparts
have been signed by all the parties hereto or thereto.

     10.16.  Use of Defined  Terms.  All words used  herein in the  singular  or
plural  shall be deemed to have been used in the  plural or  singular  where the
context or  construction  so  requires.  Any defined  term used in the  singular
preceded by "any"  shall be taken to  indicate  any number of the members of the
relevant class.

     10.17.  Offsets.  Nothing  in this  Agreement  shall be  deemed a waiver or
prohibition of any Bank's right of banker's lien or offset.

<PAGE>

     10.18 Entire Agreement.  This Agreement, the Notes issued hereunder and the
other Loan Documents  constitute the entire  understanding of the parties hereto
as of the date hereof with respect to the subject  matter hereof and thereof and
supersede any prior agreements, written or oral, with respect hereto or thereto.

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



                                                     AeroCentury Corp.




                                              By ______________________________
                                                 Name:
                                                 Title:
Notices To:
AeroCentury Corp.
1440 Chapin Avenue, #310
Burlingame, CA 94010
FAX No. (650) 696-3929
Att: Toni M. Perazzo
     Vice President-Finance

                                                   FIRST UNION NATIONAL BANK



                                               By ______________________________
                                                    Hugh W. Connelly
                                                     Vice President
Notices To:
Mr. Hugh W. Connelly
Vice President
First Union National Bank
Transportation and Leasing Division
FC 1-8-11-24
1339 Chestnut Street
Philadelphia, PA  19107
FAX No. (215) 786-7704

<PAGE>

                                           Reference Table of Definitions
<TABLE>
<CAPTION>
                                                                                                            


definition                                                                                             page defined

<S>                                                                                                              <C>

Additional Amount................................................................................................13
AeroCentury.......................................................................................................1
Affiliate.........................................................................................................1
Agent.............................................................................................................1
Aggregate Revolving Loan Commitment..............................................................................11
Agreement.........................................................................................................2
Agreement Year...................................................................................................12
Bank..............................................................................................................1
Banks.............................................................................................................1
Base Rate.........................................................................................................2
Base Rate Loans...................................................................................................2
Borrowing.........................................................................................................2
Borrowing Base....................................................................................................2
Borrowing Base Certificate........................................................................................2
Business Day......................................................................................................2
Capitalized Lease.................................................................................................2
Capitalized Lease Obligations.....................................................................................2
Closing...........................................................................................................2
Closing Date......................................................................................................3
Code..............................................................................................................3
Commitment Fee...................................................................................................15
control...........................................................................................................1
Covenant Compliance Certificate...................................................................................3
Debt..............................................................................................................3
Debt Service......................................................................................................3
Default Rate......................................................................................................3
Dollars...........................................................................................................3
EBITDA............................................................................................................3
Eligible Collateral...............................................................................................4
Eligible Lease Receivables........................................................................................4
Environmental Control Statutes....................................................................................4
Equipment.........................................................................................................3
ERISA.............................................................................................................5
ERISA Affiliate...................................................................................................5
Event of Default.................................................................................................31
Federal Funds Rate................................................................................................5
First Union.......................................................................................................1
Fiscal Quarter....................................................................................................5
Fiscal Year.......................................................................................................5
GAAP..............................................................................................................5
Generally Accepted Accounting Principles..........................................................................5
<PAGE>

Governmental Authority............................................................................................5
Governmental Authority............................................................................................5
Indebtedness for Borrowed Money...................................................................................5
Indemnitees......................................................................................................38
Intangible Assets.................................................................................................5
Interest Period...................................................................................................6
Investment........................................................................................................6
JMC..............................................................................................................30
LIBO Rate.........................................................................................................6
LIBO Rate Loans...................................................................................................7
LIBO Rate Reserve Percentage......................................................................................6
Lien..............................................................................................................7
Loan.............................................................................................................11
Loan Documents....................................................................................................7
Loans............................................................................................................11
London Business Day...............................................................................................2
Management Agreement.............................................................................................30
Material Adverse Change...........................................................................................7
Material Adverse Effect...........................................................................................7
Monthly Lease Portfolio...........................................................................................7
Multiemployer Plan................................................................................................7
Net Worth.........................................................................................................7
Non-Recourse Debt.................................................................................................8
Note.............................................................................................................13
Notes............................................................................................................13
Obligations.......................................................................................................8
Operating Lease...................................................................................................8
Participants.....................................................................................................36
Participations...................................................................................................36
PBGC..............................................................................................................8
Pension Plan......................................................................................................8
Permitted Liens...................................................................................................8
Person............................................................................................................9
Plan..............................................................................................................9
Potential Default.................................................................................................9
Prohibited Transaction............................................................................................9
Receivables Report................................................................................................7
Recourse Debt.....................................................................................................9
Regulation........................................................................................................9
Regulation D......................................................................................................9
Regulatory Change.................................................................................................9
Reportable Event..................................................................................................9
Request for Advance..............................................................................................13
Required Banks...................................................................................................10
Revolver Termination Date........................................................................................11
Revolving Credit Loan............................................................................................11
Revolving Credit Loans...........................................................................................11
<PAGE>

Revolving Credit Note............................................................................................13
Revolving Credit Notes...........................................................................................13
Revolving Loan Commitment........................................................................................11
Revolving Loan Commitment Percentage.............................................................................12
Security Agreement...............................................................................................10
Solvent..........................................................................................................10
Subordinated Debt................................................................................................10
Subsidiary.......................................................................................................10
Tangible Net Worth...............................................................................................10
Taxes............................................................................................................17
Termination Event................................................................................................10
Unfunded Pension Liabilities.....................................................................................10
Unrecognized Retiree Welfare Liability...........................................................................11
Unrestricted Subsidiaries........................................................................................11

<PAGE>
</TABLE>
<TABLE>
<CAPTION>



Note                                                                                    
                                                     EXHIBIT A

                                         BANKS' COMMITMENTS AND PERCENTAGES


         Bank                                        Commitment                          Percentage

<S>                                                  <C>                                  <C>

First Union National Bank                            $15,000,000                          100.0%
Transportation and Leasing Division
FC 1-8-11-24
1339 Chestnut Street
Philadelphia, PA  19107
FAX No. (215) 786-7704
</TABLE>


<PAGE>

                                            
    Dated ___________, ____
                                                                      EXHIBIT B
NOTE

$__,000,000                                                    Philadelphia, PA
                                                            _____________, 1998

     For Value  Received,  AeroCentury  Corp.,  a Delaware  corporation,  hereby
promises  to pay to the order of  ______________  BANK (the  "Bank"),  in lawful
currency of the United States of America in immediately  available  funds at the
offices of First  Union  located at Broad and  Chestnut  Streets,  Philadelphia,
Pennsylvania,  on the Revolver Termination Date or on such earlier date or dates
as  provided in the Credit  Agreement  described  below,  the  principal  sum of
_____________  DOLLARS  ($__,000,000)  or, if less,  the then  unpaid  principal
amount of all Loans made by the Bank pursuant to the Credit Agreement.

     AeroCentury  Corp.  promises  also to pay interest on the unpaid  principal
amount  hereof in like money at such office  from the date hereof  until paid in
full at the rates and at the times provided in the Credit Agreement.

     This Note is one of the Notes  referred to in, is entitled to the  benefits
of and is secured by security  interests  referred  to in the Credit  Agreement,
dated  June  30,  1998,  by  and  between  AeroCentury  Corp.  and  the  banking
institutions named therein, with First Union National Bank as Agent (as such may
be amended, modified, supplemented,  restated or replaced from time to time, the
"Credit Agreement").  This Note is subject to voluntary prepayment and mandatory
repayment  prior to the  Revolver  Termination  Date,  in  whole or in part,  as
provided in the Credit Agreement.

     In case an Event of Default  shall occur and be  continuing,  the  maturity
date  of the  principal  of  and  the  accrued  interest  on  this  Note  may be
accelerated  and be  declared  to be due and  payable in the manner and with the
effect provided in the Credit Agreement.

     AeroCentury  hereby waives  presentment,  demand,  protest or notice of any
kind in connection with this Note.

     Notwithstanding  the face amount of this Note, the undersigned's  liability
hereunder shall be limited,  at all times, to the actual  aggregate  outstanding
indebtedness to the Bank relating to such Bank's Loans,  including all principal
and  interest,  together  with all fees and  expenses  as provided in the Credit
Agreement,  as  established  by the  Bank's  books and  records  which  shall be
conclusive absent manifest error.

     Capitalized  terms used but not defined  herein  shall have the  respective
meanings assigned to them in the Credit Agreement.

<PAGE>

     This Note shall be construed in accordance  with and be governed by the law
of the  commonwealth of  pennsylvania  without regard to pennsylvania or federal
principles or conflict of laws.


                                                 AeroCentury Corp.

                                               By ______________________________
                                                     Name:
                                                     Title:
<PAGE>



Borrowing Base Certificate                                    Date: ___________
                                                                     EXHIBIT C

                           BORROWING BASE CERTIFICATE



Date of Certificate:        _________________________

Date of Information:        _________________________



To:  First Union National Bank, as Agent


Gentlemen:

     This Borrowing  Base  Certificate is delivered to you pursuant to the terms
of Section 5.1 of the Credit  Agreement,  dated June 30,  1998,  as currently in
effect.  Capitalized terms used without  definition below have the same meanings
as they have in the Credit Agreement.

We hereby certify that:

     1. No Potential  Default or Event of Default has occurred and is continuing
as of the date of this Borrowing Base Certificate.

     2. There has been no Material  Adverse Change since [insert the date of the
most recent financial  statements delivered to the Bank pursuant to the terms of
Section  5.1 of the  Credit  Agreement],  except as  disclosed  on the  attached
schedules.

     3. The information set forth on the attached schedules is true, current and
complete as of the date of this Borrowing Base Certificate.



                                                AeroCentury Corp.



                                              By ______________________________
                                                   Name:
                                                   Title:

<PAGE>


                                AeroCentury Corp.
                   Computation of Borrowing Base Availability


                                                                            


         Collateral Loan Value

         Total Borrowing Base                              $____________________
         Maximum Loans

         Revolving Loan Commitment                        $       ____,000,000

         Credit Usage

         Aggregate Loan Balance (principal) at date
         of certificate                                    $____________________

         Loan Availability

         Collateral Loan Value minus Credit Usage          $____________________

         Maximum Loans minus Credit Usage                  $____________________

         Loan Availability (lesser of two preceding lines) $____________________

         Amount of Loan Requested (not to exceed 
         preceding line)                                   $____________________
 

<PAGE>


Mortgage and Security Agreement                         Dated ___________, ____
                                                                      EXHIBIT D

                        MORTGAGE AND SECURITY AGREEMENT

                                 [to be added]

<PAGE>

Covenant Compliance Certificate                                Date: ___________
                                    EXHIBIT E

                         COVENANT COMPLIANCE CERTIFICATE


     The  undersigned,  the  [Chief  Executive]  Officer  of  AeroCentury  Corp.
("AeroCentury"),  does hereby certify to First Union  National Bank,  Agent (the
"Bank"),  as required by that certain Credit Agreement,  dated June 30, 1998, by
and between  AeroCentury  and the Bank (the  "Agreement")  (terms not  otherwise
defined  herein shall have the meanings  given to such terms in the  Agreement),
that as such officer he is  authorized  to execute this  Compliance  Certificate
(this "Certificate") on behalf of AeroCentury and does further certify that:

     1.  AeroCentury  has  complied  and is in  compliance  with all  covenants,
agreements  and conditions in the Agreement and each of the other Loan Documents
on the date hereof.

     2. Each  representation and warranty contained in the Agreement and each of
the other Loan Documents is true and correct on the date hereof.

     3. No Potential  Default or Event of Default has occurred and is continuing
as of the date of this Compliance Certificate.

     4. There has been no Material  Adverse Change since [insert the date of the
most recent financial  statements delivered to the Bank pursuant to the terms of
Section  5.1 of the  Credit  Agreement],  except as  disclosed  on the  attached
schedules.

     5. The covenant  compliance  calculations  set forth in Attachment 1 hereto
are true and correct on the dates specified.

     IN WITNESS  WHEREOF,  the undersigned has executed this  Certificate in his
capacity as an officer of AeroCentury on this ___ day of _________, _____.


                                                     AeroCentury Corp.



                                            By: _______________________________
                                                  Name:
                                                  Title:


<PAGE>


                        COVENANT COMPLIANCE CALCULATIONS
                                AeroCentury Corp.
                     for the (quarter, year) ending ________


                                [to be added]

<PAGE>
                                                                     EXHIBIT F

                              DEPRECIATION POLICIES



     AeroCentury Corp.'s interests in aircraft and aircraft engines are recorded
at cost,  which  includes  acquisition  costs  and loan  fees.  Depreciation  is
computed using the straight-line  method over the aircraft's  estimated economic
life (generally assumed to be twelve years), to an estimated residual value.


<PAGE>

                                   SCHEDULE I

                               DISCLOSURE SCHEDULE


                                               
Section 3.2   Stock Ownership
<TABLE>
<CAPTION>

Capitalization

         Class                      Total Authorized           Total Issued
<S>                                   <C>                        <C>   
 
        Common                        3,000,000                  1,606,557
 
      Preferred   
       Series A                         100,000                      -0-
       undesignated                   1,900,000                      -0-
</TABLE>


     In connection with the adoption of a shareholders  rights plan, the Company
issued  rights to its  shareholders  as of April 23, 1998,  entitling  each such
shareholder the right to purchase 1/100th of a share of Series A Preferred Stock
for each share of Common Stock held by the shareholder.
 
     Principal Holders

     To the Company's best knowledge,  the only  shareholder of the Company that
holds 5% or more off the  Common  Stock of the  Company is  JetFleet  Management
Corp.,  which holds 147,667 shares of Common Stock or approximately 9.2% of that
class.

Section 3.3. Litigation

None

Section 3.5 Material Adverse Change

None

Section 3.7 Taxes

None

Section 3.12 Subsidiaries

None

Section 3.13 Liens

     AeroCentury  IV,  Inc.  holds a lien  against  the Shorts  SD3-60-100  (S/N
SH3604)  aircraft owned by the Company  securing a promissory note with original
principal amount of $866,667.




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