FIELDS AIRCRAFT SPARES INC
8-K, 1997-10-14
AIRCRAFT & PARTS
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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



                               September 30, 1997 
                Date of Report (Date of earliest event reported)



                          FIELDS AIRCRAFT SPARES, INC. 
             (Exact name of Registrant as specified in its charter)


        Utah                       0-27100                         95-4218263
 -----------------          ------------------------            ---------------
 (State or other            (Commission File Number)             (IRS Employer
  jurisdiction of                                                Identification
  Incorporation                                                        No.)

                               2251-A Ward Avenue
                              Simi Valley, CA 93005
                    (Address of principal executive offices)
                                   (Zip Code)



                                 (805) 583-0080 
              (Registrant's telephone number, including area code)


<PAGE>

Item 7.           Financial Statements and Exhibits.

         (c) Exhibits.

             Exhibit 4.1     Indenture for the 8.5% Subordinated Redeemable
                             Debentures Due 2000, dated as of September 30, 
                             1997, between the Company and Etablissement Pour le
                             Placement Prive, as Trustee.

             Exhibit 4.2     Form of 8.5% Subordinated Redeemable Debentures Due
                             2000 (included in Exhibit A to Exhibit 4.1 above).


Item 9.           Sales of Equity Securities Pursuant to Regulation S.

         As of September 30, 1997, Fields Aircraft Spares,  Inc. (the "Company")
closed  the  sale of  $10,000,000  principal  amount  of its  8.5%  Subordinated
Redeemable Debentures Due 2000 (the "Debentures") issued under an Indenture (the
"Indenture"),   dated  as  of  September  30,  1997,  between  the  Company  and
Etablissement  Pour le Placement  Prive as Trustee.  The Securities were sold in
reliance on  Regulation  S of the  Securities  Act of 1933  ("Regulation  S") to
entities which represented to the Company to be accredited  non-U.S.  persons as
defined in Regulation S.

         The  Debentureholders  will  have a  one-time  right at any time  after
December 29, 1997 through  September  27, 2000,  subject to prior  redemption or
repurchase,  to convert up to 30% (less any  amounts  converted  pursuant to the
Mandatory  Conversion  described below) of the principal amount of such holder's
Debentures,  that is $1,000  principal amount or an integral  multiple  thereof,
into  Common  Shares,  par value $.05 per share (the  "Common  Shares"),  of the
Company at a  conversion  price  (the  "Conversion  Price")  equal to 85% of the
average  closing  price of the Common Shares  during the  20-trading  day period
ending on the date of notice of conversion, but in no event less than $12.00 per
share,  subject to certain  adjustments.  In the event  that,  during any 20-day
trading day period,  the average  closing  price of the Common  Shares equals or
exceeds  $12.00 per  share,  the  Company  may,  within 30 days of such  period,
require  the  conversion  (the  "Mandatory  Conversion")  of up to  20%  of  the
principal amount of outstanding Debentures at the Conversion Price.

         The  Debentures are  redeemable,  in whole or in part, at the option of
the Company,  at any time on or after March 31, 1999,  at 100% of the  principal
amount plus accrued interest.

                                        2

<PAGE>

         The foregoing  description  of the Debentures is qualified by reference
to the Indenture and form of Debenture attached thereto,  which is an exhibit to
this current report on Form 8-K.

         Etablissement  Pour le Placement  Prive,  Zurich  Switzerland  ("EPP"),
acted as the  Company's  placement  agent in  connection  with the  offering and
received a commission of 8% of the principal  amount of Debentures  sold and was
issued 15,000 Common  Shares (the "Agent  Shares")  pursuant to the terms of the
Placement Agent Agreement, dated September 9, 1997, between the Company and EPP,
as amended.  The issuance of the Agent Shares was made in reliance on Regulation
S. EPP has represented to the Company that EPP is an accredited non-U.S.  person
as defined in Regulation S.

         The Company  estimates that the total fees and expenses incurred by the
Company, in addition to the 8% commission described above, will be approximately
$350,000,  which  includes  a  placement  fee to be  paid  to  EPP of  $175,000.
Accordingly,  the net  proceeds to the Company  from the sale of the  Debentures
should be approximately  $8,850,000.  Of that amount,  approximately $110,000 is
still due to the Company from the Escrow Agent and had not been  received by the
Company as of the date of this filing.

         The Company  has granted  certain  piggyback  registration  rights with
respect to the Common Shares  issuable upon  conversion of the  Debentures  (the
"Registrable  Shares").  Common  Shares that may be  transferred  within 60 days
without  registration  under the Securities Act of 1933 pursuant to Regulation S
are not included in Registrable Shares.  Registration rights expire on September
30,  1998, or such  shorter  period as  Regulation  S may  require  before  the
Registrable Shares may be transferred without registration.

         Effective  October 13, 1997, the Company issued 5,000 Common Shares and
has agreed to pay  additional  cash  consideration  to EPP in connection  with a
future  equity  raising  transaction.  The  issuance of these shares was made in
reliance on  Regulation  S. EPP has  represented  to the Company  that EPP is an
accredited non-U.S. person as defined in Regulation S.

                                       3
<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 hereunto duly authorized.

                                          FIELDS AIRCRAFT SPARES, INC.



Date:  October 14, 1997                   By /s/ Alan M. Fields
                                             -------------------------
                                             Alan M. Fields, President

                                       4



                          FIELDS AIRCRAFT SPARES, INC.

                                     Issuer




                                       AND



                      ETABLISSEMENT POUR LE PLACEMENT PRIVE

                                     Trustee



                                    INDENTURE

                         Dated as of September 30, 1997



                8.5% Subordinated Redeemable Debentures Due 2000



<PAGE>



                                TABLE OF CONTENTS

                                                                           PAGE


                                    ARTICLE I

                                   DEFINITIONS

   Section 1.1       Definitions...........................................  2
   Section 1.2       Rules of Construction.................................  6

                                   ARTICLE II

                   ISSUE, DESCRIPTION, EXECUTION, REGISTRATION
                           AND EXCHANGE OF DEBENTURES

   Section 2.1       Designation, Amount and Issue of Debentures...........  7
   Section 2.2       Form of Debentures....................................  7
   Section 2.3       Date and Denomination of Debentures; Payments 
                      of Interest..........................................  8
   Section 2.4       Execution of Debentures...............................  8
   Section 2.5       Exchange and Registration of Transfer of 
                      Debentures; Restrictions on Transfer.................  9
   Section 2.6       Mutilated, Destroyed, Lost or Stolen Debentures....... 13
   Section 2.7       Temporary Debentures.................................. 14
   Section 2.8       Cancellation of Debentures Paid, Etc.................. 15
   Section 2.9       CUSIP Numbers......................................... 15

                                   ARTICLE III

                     REDEMPTION AND REPURCHASE OF DEBENTURES

   Section 3.1       Redemption Prices..................................... 15
   Section 3.2       Notice of Redemption; Selection of Debentures......... 15
   Section 3.3       Payment of Debentures Called for Redemption........... 17

                                   ARTICLE IV

                       PARTICULAR COVENANTS OF THE COMPANY

   Section 4.1       Payment of Principal, Premium and Interest............ 18
   Section 4.2       Maintenance of Office or Agency....................... 18
   Section 4.3       Appointments to Fill Vacancies in Trustee's Office.... 18
   Section 4.4       Provisions as to Paying Agent......................... 19
   Section 4.5       Corporate Existence................................... 20

                                        i

<PAGE>

   Section 4.6       Stay, Extension and Usury Laws........................ 20
   Section 4.7       Sale of Inventory..................................... 20

                                    ARTICLE V

                             DEBENTUREHOLDERS' LISTS

   Section 5.1       Debentureholders' Lists............................... 21

                                   ARTICLE VI

                              DEFAULTS AND REMEDIES

   Section 6.1       Events of Default..................................... 21
   Section 6.2       Payments of Debentures on Default; Suit Therefor...... 23
   Section 6.3       Application of Monies Collected by Trustee............ 25
   Section 6.4       Proceedings by Debentureholder........................ 25
   Section 6.5       Proceedings by Trustee................................ 26
   Section 6.6       Remedies Cumulative and Continuing.................... 26
   Section 6.7       Direction of Proceedings and Waiver of Defaults 
                      by Majority of Debentureholders...................... 27
   Section 6.8       Notice of Defaults.................................... 27
   Section 6.9       Undertaking to Pay Costs.............................. 27

                                   ARTICLE VII

                             CONCERNING THE TRUSTEE

   Section 7.1       Duties and Responsibilities of Trustee................ 28
   Section 7.2       Reliance on Documents, Opinions, Etc.................. 29
   Section 7.3       No Responsibility for Recitals, Etc................... 30
   Section 7.4       Trustee, Paying Agents, Conversion Agents or 
                      Registrar May Own Debentures......................... 30
   Section 7.5       Monies to Be Held in Trust............................ 30
   Section 7.6       Compensation and Expenses of Trustee.................. 30
   Section 7.7       Officers' Certificate as Evidence..................... 31
   Section 7.8       Resignation or Removal of Trustee..................... 31
   Section 7.9       Acceptance by Successor Trustee....................... 32
   Section 7.10      Successor by Merger, Etc.............................. 33

                                       ii

<PAGE>

                                  ARTICLE VIII

                         CONCERNING THE DEBENTUREHOLDERS

   Section 8.1       Action by Debentureholders............................ 33
   Section 8.2       Proof of Execution by Debentureholders................ 33
   Section 8.3       Who Are Deemed Absolute Owners........................ 34
   Section 8.4       Company-Owned Debentures Disregarded.................. 34
   Section 8.5       Revocation of Consents, Future Holders Bound.......... 34

                                   ARTICLE IX

                           DEBENTUREHOLDERS' MEETINGS

   Section 9.1       Purposes for Which Meetings May be Called............. 35
   Section 9.2       Manner of Calling Meetings; Record Date............... 35
   Section 9.3       Call of Meeting by Company or Debentureholders........ 36
   Section 9.4       Who May Attend and Vote at Meetings................... 36
   Section 9.5       Manner of Voting at Meetings and Record to be Kept.... 36
   Section 9.6       Exercise of Rights of Trustee and Debentureholders 
                      Not To Be Hindered or Delayed........................ 37

                                    ARTICLE X

                             SUPPLEMENTAL INDENTURES

   Section 10.1      Supplemental Indentures Without Consent of 
                      Debentureholders..................................... 37
   Section 10.2      Supplemental Indentures With Consent of 
                      Debentureholders..................................... 38
   Section 10.3      Effect of Supplemental Indentures..................... 39
   Section 10.4      Notation on Debentures................................ 39
   Section 10.5      Evidence of Compliance of Supplemental Indenture 
                      to Be Furnished to the Trustee....................... 39

                                   ARTICLE XI

                    CONSOLIDATION, MERGER, SALE, CONVEYANCE,
                               TRANSFER AND LEASE

   Section 11.1      Company May Consolidate, Etc. on Certain Terms........ 39
   Section 11.2      Successor Company To Be Substituted................... 40
   Section 11.3      Opinion of Counsel To Be Given to Trustee............. 40


                                       iii

<PAGE>

                                   ARTICLE XII

                    SATISFACTION AND DISCHARGE OF INDENTURE;
                                UNCLAIMED MONEYS

   Section 12.1      Termination of Obligations upon Cancellation 
                      of the Debentures.................................... 40
   Section 12.2      Survival of Certain Obligations....................... 41
   Section 12.3      Acknowledgment of Discharge by Trustee................ 41
   Section 12.4      Application of Trust Assets........................... 41
   Section 12.5      Repayment to the Company; Unclaimed Money............. 41
   Section 12.6      Reinstatement......................................... 42

                                  ARTICLE XIII

                    IMMUNITY OF INCORPORATORS, SHAREHOLDERS,
                             OFFICERS AND DIRECTORS

   Section 13.1      Indenture and Debentures Solely Corporate 
                      Obligations.......................................... 42

                                   ARTICLE XIV

                            CONVERSION OF DEBENTURES

   Section 14.1      Right to Convert...................................... 42
   Section 14.2      Exercise of Conversion Privilege; Issuance of Common 
                      Stock on Conversion; No Adjustment for Interest 
                      or Dividends......................................... 43
   Section 14.3      Cash Payments in Lieu of Fractional Shares............ 45
   Section 14.4      Conversion Price...................................... 45
   Section 14.5      Adjustment of Conversion Price........................ 45
   Section 14.6      Effect of Reclassification, Consolidation, Merger 
                      or Sale.............................................. 47
   Section 14.7      Taxes on Shares Issued................................ 48
   Section 14.8      Reservation of Shares; Shares to Be Fully Paid........ 48
   Section 14.9      Responsibility of Trustee............................. 48
   Section 14.10     Notice to Holders Prior to Certain Actions............ 49

                                   ARTICLE XV

                                  SUBORDINATION

   Section 15.1      Agreement to Subordinate.............................. 50
   Section 15.2      Certain Definitions................................... 50
   Section 15.3      Liquidation; Dissolution; Bankruptcy.................. 51
   Section 15.4      Default on Senior Indebtedness........................ 51
   Section 15.5      When Distribution Must Be Paid Over................... 52
   Section 15.6      Notice by Company..................................... 52

                                       iv

<PAGE>

   Section 15.7      Subrogation........................................... 52
   Section 15.8      Relative Rights....................................... 52
   Section 15.9      Subordination May Not Be Impaired by Company.......... 53
   Section 15.10     Distribution or Notice to Representative.............. 53
   Section 15.11     Rights of Trustee and Paying Agent.................... 53
   Section 15.12     Authorization to Effect Subordination................. 54
   Section 15.13     Conversions Not Deemed Payment........................ 54
   Section 15.14     Amendments............................................ 54

                                   ARTICLE XVI

                            MISCELLANEOUS PROVISIONS

   Section 16.1      Provisions Binding on Company's Successors............ 55
   Section 16.2      Official Acts by Successor Company.................... 55
   Section 16.3      Addresses for Notices, Etc............................ 55
   Section 16.4      Governing Law......................................... 56
   Section 16.5      Evidence of Compliance with Conditions Precedent; 
                      Certificates to Trustee.............................. 56
   Section 16.6      Legal Holidays........................................ 56
   Section 16.7      Benefits of Indenture................................. 56
   Section 16.8      Table of Contents, Headings Etc....................... 56
   Section 16.9      Authenticating Agent.................................. 56
   Section 16.10     Execution in Counterparts............................. 57

EXHIBIT A - FORM OF DEBENTURE

EXHIBIT B - FORM OF TRANSFEREE CERTIFICATE FOR DEBENTURES TO BE ISSUED TO 
            ACCREDITED INVESTORS

                                        v

<PAGE>

                  INDENTURE,  dated as of  September  30,  1997,  by and between
FIELDS  AIRCRAFT  SPARES,   INC.,  a  Utah  corporation  (the  "Company"),   and
ETABLISSEMENT   POUR  LE  PLACEMENT  PRIVE  (the   "Trustee"),   a  Lichtenstein
corporation  and VON GRAFFENREID  AG, a Swiss banking  corporation  (the "Paying
Agent").


                              W I T N E S S E T H :


                  WHEREAS,  for its lawful corporate  purposes,  the Company has
duly authorized the issuance of its 8.5% Subordinated  Redeemable Debentures Due
2000 (the  "Debentures"),  in an  aggregate  principal  amount  not to exceed US
$10,000,000  and, to provide the terms and conditions  upon which the Debentures
are to be authenticated,  issued and delivered,  the Company has duly authorized
the execution and delivery of this Indenture; and

                  WHEREAS, the Debentures,  the certificate of authentication to
be borne by the Debentures,  a form of assignment,  a form of conversion  notice
and  a  certificate  of  transfer  to be  borne  by  the  Debentures  are  to be
substantially in the forms hereinafter provided for; and

                  WHEREAS, all acts and things necessary to make the Debentures,
when executed by the Company and authenticated and delivered by the Trustee or a
duly authorized  authenticating agent, as in this Indenture provided, the valid,
binding and legal obligations of the Company, and to constitute these presents a
valid agreement  according to its terms,  have been done and performed,  and the
execution of this Indenture and the issuance hereunder of the Debentures have in
all respects been duly authorized.

                   NOW, THEREFORE, THIS INDENTURE WITNESSETH:

                  That in order to declare the terms and  conditions  upon which
the Debentures are, and are to be, authenticated,  issued and delivered,  and in
consideration  of the  premises  and  of  the  purchase  and  acceptance  of the
Debentures  by the holders  thereof,  the Company  covenants and agrees with the
Trustee for the equal and proportionate  benefit of the respective  holders from
time to time of the Debentures (except as otherwise provided below) as follows:


<PAGE>

                                    ARTICLE I

                                   DEFINITIONS


                  Section 1.1 Definitions. The terms defined in this Section 1.1
(except as herein otherwise  expressly  provided or unless the context otherwise
requires) for all purposes of this  Indenture and of any indenture  supplemental
hereto  shall have the  respective  meanings  specified in this Section 1.1. All
other terms used in this Indenture  that are defined in the Trust  Indenture Act
(as hereinafter  defined) or that are by reference defined in the Securities Act
(as hereinafter  defined),  except as herein otherwise expressly provided for or
unless the context otherwise requires,  shall have the meanings assigned to such
terms in said Trust  Indenture Act and in said Securities Act as in force on the
date of this Indenture.  The words "herein," "hereof,"  "hereunder" and words of
similar  import  refer to this  Indenture  as a whole and not to any  particular
Article or Section.

                  Accredited Investor: The term "Accredited Investor" shall have
the meaning specified in Rule 501(a) under the Securities Act.

                  Affiliate:  An "Affiliate" of any specified  person shall mean
an  "affiliate"  as defined in Rule 144(a) as  promulgated  under the Securities
Act.

                  Board of Directors:  The term "Board of Directors"  shall mean
the Board of  Directors of the Company or a committee of such Board of Directors
duly authorized to act for it.

                  Board  Resolution:  The term "Board  Resolution"  shall mean a
copy of a resolution certified by the Secretary or an Assistant Secretary of the
Company to have been duly  adopted by the Board of  Directors  and to be in full
force and effect on the date of such certification.

                  Business Day: The term  "Business Day" shall mean a day, other
than a  Saturday,  a  Sunday  or a day on  which  the  banking  institutions  in
Switzerland  are authorized or obligated by law or executive order to close or a
day that is declared a United States or Swiss holiday.

                  Capital  Stock:  The term "Capital  Stock" of any person shall
mean any and all shares, interests, participations or other equivalents (however
designated) of such person's corporate stock or any and all equivalent ownership
interests in a person  (other than a  corporation)  whether now  outstanding  or
issued after the date hereof.

                  Closing Date: The term "Closing Date" shall mean September 30,
1997.

                  Commission:  The term  "Commission"  shall mean the Securities
and Exchange  Commission,  as from time to time  constituted,  created under the
Exchange Act or, if at any time after  the  execution  of this  instrument  such

                                        2

<PAGE>

Commission  is not existing and  performing  the duties now assigned to it under
the Trust Indenture Act, the body performing such duties at such time.

                  Common Stock:  The term "Common Stock" shall mean any stock of
any class of the Company that does not have a preference in respect of dividends
or of amounts payable in the event of any voluntary or involuntary  liquidation,
dissolution  or winding up of the Company and that is not subject to  redemption
by the Company.  Subject to the  provisions  of Section  14.6,  however,  shares
issuable on  conversion  of  Debentures  shall  include only shares of the class
designated  as common  stock of the  Company  at the date of this  Indenture  or
shares  of  any  class  or  classes  resulting  from  any   reclassification  or
reclassifications  thereof  and  that do not have a  preference  in  respect  of
dividends or of amounts  payable in the event of any  voluntary  or  involuntary
liquidation,  dissolution  or winding up of the Company and that are not subject
to redemption  by the Company;  provided that if at any time there shall be more
than one such  resulting  class,  the shares of each such class then so issuable
shall be substantially in the proportion that the total number of shares of such
class  resulting  from all such  reclassification  bears to the total  number of
shares of all such classes resulting from all such reclassifications.

                  Company: The term "Company" shall mean Fields Aircraft Spares,
Inc. a Utah  corporation,  and subject to the  provisions  of Article XI,  shall
include its successors and assigns.

                  Conversion  Price: The term "Conversion  Price" shall have the
meaning specified in Section 14.4.

                  Corporate  Trust  Office of the Trustee:  The term  "Corporate
Trust Office of the Trustee," or other  similar  term,  shall mean the office of
the Trustee at which at any particular  time its corporate  trust business shall
be  principally  administered,  which  office  is, at the date as of which  this
Indenture is dated, located at Gartenstrasse 10, CH-8002,  Zurich,  Switzerland,
Attention:  Dr. Dieter Wicki at which office it is authorized to receive notices
hereunder.

                  Debenture or Debentures: The terms "Debenture" or "Debentures"
shall  mean any one or  more,  as the  case  may be,  of the  8.5%  Subordinated
Redeemable Debentures Due 2000 authenticated and delivered under this Indenture.

                  Debentureholder;   holder:  The  terms   "Debentureholder"  or
"holder" as applied to any Debenture,  or other similar terms (but excluding the
term  "beneficial  holder"),  shall  mean any person in whose name at the time a
particular Debenture is registered on the Debenture registrar's books.

                  Debenture register:  The term "Debenture  register" shall have
the meaning specified in Section 2.5(a).

                  Debenture registrar: The term "Debenture registrar" shall have
the meaning specified in Section 2.5(a).

                                        3

<PAGE>

                  default:  The term "default"  shall mean any event that is, or
after notice or passage of time, or both, would be, an Event of Default.

                  Defaulted Interest:  The term "Defaulted  Interest" shall have
the meaning specified in Section 2.3.

                  definitive   Debentures;   in   definitive   form:   The  term
"definitive  Debentures"  shall have the meaning  specified  in Section 2.2, any
reference to Debentures "in definitive  form" shall mean definitive  Debentures,
and any  reference to  securities  "in  definitive  form" shall mean  definitive
Debentures or Common Stock as the context requires.

                  Event of Default:  The term "Event of Default"  shall mean any
event specified in Section 6.1(a) through (e).

                  Exchange  Act:  The  term   "Exchange   Act"  shall  mean  the
Securities  Exchange  Act of 1934,  as  amended,  and the rules and  regulations
promulgated thereunder.

                  Indenture:  The term "Indenture" shall mean this instrument as
originally  executed or, if amended or  supplemented as herein  provided,  as so
amended or supplemented.

                  Interest Payment Date: The term "Interest  Payment Date" shall
mean each March 31 and September 30, beginning March 31, 1998.

                  Inventory:   The  term  "Inventory"  shall  have  the  meaning
specified in Section 4.7.

                  Minimum Proceeds:  The term "Minimum  Proceeds" shall have the
meaning specified in Section 4.8.

                  Nonpayment Default:  The term "Nonpayment  Default" shall have
the meaning specified in Section 15.4(b).

                  Non-U.S.  Person:  The term  "Non-U.S.  Person" shall have the
meaning set forth in Section 2.2.

                  Officers' Certificate:  The term "Officers' Certificate," when
used  with  respect  to the  Company,  shall  mean a  certificate  signed by two
authorized officers which shall include (a) any of the Chairman,  President, the
Chief Executive  Officer or the Chief Financial Officer and (b) any Treasurer or
Secretary or any  Assistant  Secretary of the Company,  that is delivered to the
Trustee.  Each such  certificate  shall include the  statements  provided for in
Section 16.5 if and to the extent required by the provisions of such Section.

                  Opinion of Counsel:  The term "Opinion of Counsel"  shall mean
an opinion in writing  signed by legal  counsel,  who may be an  employee  of or
counsel to the  Company or other  counsel  acceptable  to the  Trustee,  that is

                                        4

<PAGE>

delivered  to the  Trustee.  Each such  opinion  shall  include  the  statements
provided for in Section 16.5 if and to the extent  required by the provisions of
such Section.

                  outstanding:   The  term   "outstanding"   with  reference  to
Debentures as of any  particular  time shall mean,  subject to the provisions of
Section 8.4, all  Debentures  authenticated  and  delivered by the Trustee under
this Indenture, except

                  (a)      Debentures  theretofore  canceled by  the  Trustee or
         delivered to the Trustee for cancellation;

                  (b) Debentures,  or portions thereof,  for which monies in the
         necessary  amount  shall have been  deposited in trust with the Trustee
         for payment, redemption or repurchase; provided that if such Debentures
         are to be  redeemed  prior  to the  maturity  thereof,  notice  of such
         redemption  shall have been given  pursuant to Article III or provision
         satisfactory  to the  Trustee  shall  have  been made for  giving  such
         notice;

                  (c)  Debentures  paid or  converted  pursuant  to Section  2.6
         hereof or  Debentures  in lieu of or in  substitution  for which  other
         Debentures shall have been  authenticated and delivered pursuant to the
         terms of  Section  2.6  unless  proof  satisfactory  to the  Trustee is
         presented that any such Debentures are held by bona fide holders in due
         course; and

                  (d) Debentures converted into Common Stock or cash pursuant to
         Article XIV and Debentures not deemed  outstanding  pursuant to Section
         3.2 and 3.5.

                  Paying Agent: The term Paying Agent shall mean Von Graffenreid
AG,  its  successors  and  any  corporation  resulting  from  or  surviving  any
consolidation  or  merger to which it or its  successors  may be a party and any
successor paying agent at the time serving as successor paying agent hereunder.

                  Payment  Default:  The term "Payment  Default"  shall have the
meaning specified in Section 15.4(a).

                  person:  The  term  "person"  shall  mean  a  corporation,  an
association,  a  partnership,  an  individual,  a joint  venture,  a joint stock
company, a trust, an unincorporated organization or a government or an agency or
a political subdivision thereof.

                  Predecessor Debenture: The term "Predecessor Debenture" of any
particular  Debenture  shall mean every previous  Debenture  evidencing all or a
portion of the same debt as that evidenced by such  particular  Debenture;  and,
for the purposes of this definition,  any Debenture  authenticated and delivered
under  Section 2.6 in lieu of a lost,  destroyed  or stolen  Debenture  shall be
deemed to evidence the same debt as the lost, destroyed or stolen Debenture.

                                        5
<PAGE>

                  record  date:  The term  "record  date"  with  respect  to any
interest payment date shall have the meaning set forth in Section 2.3 hereof.

                  Regulation S: The term  "Regulation S" shall mean Regulation S
under the Securities Act and any successor regulation thereto.

                  Responsible  Officer:  The  term  "Responsible  Officer"  with
respect to the Trustee,  shall mean an officer of the Trustee  assigned and duly
authorized by the Trustee to administer its corporate trust matters.

                  Restricted Securities:  The term "Restricted Securities" shall
have the meaning specified in Section 2.5(b).

                  Securities  Act:  The term  "Securities  Act"  shall  mean the
Securities Act of 1933, as amended,  and the rules and  regulations  promulgated
thereunder.

                  Subsidiary:  The term  "Subsidiary"  of any  specified  person
shall mean (i) a corporation a majority of whose capital stock with voting power
under  ordinary  circumstances  to elect  directors  is at the time  directly or
indirectly  owned  by such  person  or  (ii)  any  other  person  (other  than a
corporation)   in  which  such  person  or  such  person  and  a  Subsidiary  or
Subsidiaries  of such  person or a  Subsidiary  or  Subsidiaries  of such person
directly  or  indirectly,  at the date of  determination  thereof,  has at least
majority ownership.

                  Successor Company: The term "Successor Company" shall have the
meaning specified in Section 11.1.

                  Trading  Day:  The term  "Trading  Day"  shall mean (x) if the
applicable  security  is quoted on the Nasdaq  SmallCap  Market,  a day on which
trades may be made thereon or (y) if the  applicable  security is not so listed,
admitted for trading or quoted, any day other than a Saturday or Sunday or a day
on which  banking  institutions  in the  State of New  York  are  authorized  or
obligated by law or executive order to close.

                  transfer: The term "transfer" shall have the meaning specified
in Section 2.5(c).

                  Trustee:  The term "Trustee" shall mean  Etablissement Pour le
Placement Prive its successors and any  corporation  resulting from or surviving
any consolidation or merger to which it or its successors may be a party and any
successor trustee at the time serving as successor trustee hereunder.

                  Section 1.2       Rules of Construction.

                  Unless the context otherwise requires:

                  (1)      a term has the meaning assigned to it;

                                        6

<PAGE>

                  (2) an accounting  term not otherwise  defined has the meaning
         assigned  to  it  in  accordance  with  generally  accepted  accounting
         principles;

                  (3)      "or" is not exclusive;

                  (4)      words in the singular include the plural, and  in the
         plural include the singular; and

                  (5) provisions apply to successive events and transactions.


                                   ARTICLE II

                   ISSUE, DESCRIPTION, EXECUTION, REGISTRATION
                           AND EXCHANGE OF DEBENTURES


                  Section 2.1 Designation,  Amount and Issue of Debentures.  The
Debentures shall be designated as "8.5% Subordinated  Redeemable  Debentures Due
2000." Debentures not to exceed the aggregate  principal amount of US$10,000,000
upon the execution of this Indenture,  or from time to time  thereafter,  may be
executed by the Company and delivered to the Trustee for authentication, and the
Trustee  shall  thereupon  authenticate  and make  available  for delivery  said
Debentures  upon the written  order of the Company,  signed by its (a) Chairman,
Chief  Executive  Officer,  President or Chief  Financial  Officer,  and (b) any
Treasurer or Secretary or any Assistant Secretary, without any further action by
the Company hereunder.

                  Section 2.2 Form of Debentures. The Debentures will be offered
and sold to persons  outside the United States (each,  a "Non-U.S.  Person") who
are Accredited  Investors in reliance on Regulation S substantially  in the form
of Exhibit A hereto,  with the  legends in  substantially  the form set forth in
Exhibit A hereto  and such  other  legends as may be  applicable  thereto.  Such
Debentures  may not be sold prior to and  including  the 90th day  following the
latest date of original issuance of the Debentures.

                  Any of the Debentures may have such letters,  numbers or other
marks of  identification  and such  notations,  legends and  endorsements as the
Company  officers  executing  the  same may  approve  (execution  thereof  to be
conclusive  evidence  of such  approval)  and as are not  inconsistent  with the
provisions  of this  Indenture,  or as may be required to comply with any law or
with any rule or regulation made pursuant thereto or with any rule or regulation
of any stock exchange on which the  Debentures  may be listed,  or to conform to
usage.

                  The terms and  provisions  contained  in the form of Debenture
attached as Exhibit A hereto shall constitute,  and are hereby expressly made, a
part of  this  Indenture  and to the  extent  applicable,  the  Company  and the
Trustee,  by their execution and delivery of this Indenture,  expressly agree to
such terms and provisions and to be bound thereby.

                                        7

<PAGE>

                  Section 2.3 Date and  Denomination of Debentures;  Payments of
Interest.  The  Debentures  shall be issuable in  registered  form only  without
coupons in  denominations  of $1,000  principal  amount and  integral  multiples
thereof.  Every Debenture shall be dated the date of its  authentication,  shall
bear interest from September 30, 1997 and interest shall be payable semiannually
on each March 31 and September 30 commencing March 31, 1998, as specified on the
face of the form of Debenture, attached as Exhibit A hereto.

                  The person in whose  name any  Debenture  (or its  Predecessor
Debenture)  is  registered  at the close of  business  on any  record  date with
respect to any interest  payment date (including any Debenture that is converted
after the  record  date and on or before the  interest  payment  date)  shall be
entitled  to  receive  the  interest  payable  on  such  interest  payment  date
notwithstanding  the cancellation of such Debenture upon any transfer,  exchange
or conversion  subsequent to the record date and prior to such interest  payment
date. Interest may, at the option of the Company, be paid by check mailed to the
address of such person as it appears on the Debenture register. The term "record
date"  with  respect  to any  interest  payment  date shall mean the March 15 or
September 30 preceding said March 31 or September 30.

                  Interest on the Debentures shall be computed on the basis of a
360-day year composed of twelve 30-day months.

                  Section 2.4 Execution of Debentures.  The Debentures  shall be
signed  in the  name  and on  behalf  of the  Company  by the  signature  of its
Chairman,  Chief Executive  Officer,  President or Chief  Financial  Officer and
attested by the  signature of its  Treasurer,  Secretary or any of its Assistant
Secretaries  (any of which  signatures  may be printed,  engraved  or  otherwise
reproduced  thereon,  by facsimile or otherwise).  Only such Debentures as shall
bear thereon a certificate of authentication substantially in the form set forth
on the form of Debenture attached as Exhibit A hereto,  manually executed by the
Trustee  (or an  authenticating  agent  appointed  by the Trustee as provided by
Section  16.9),  shall be entitled to the benefits of this Indenture or be valid
or  obligatory  for any  purpose.  Such  certificate  by the Trustee (or such an
authenticating  agent)  upon any  Debenture  executed  by the  Company  shall be
conclusive   evidence  that  the  Debenture  so  authenticated   has  been  duly
authenticated  and  delivered  hereunder  and that the holder is entitled to the
benefits of this Indenture.

                  In case any  officer of the  Company who shall have signed any
of the Debentures shall cease to be such officer before the Debentures so signed
shall have been  authenticated  and delivered by the Trustee,  or disposed of by
the Company, such Debentures  nevertheless may be authenticated and delivered or
disposed of as though the person who signed such Debentures had not ceased to be
such officer of the Company;  and any  Debenture  may be signed on behalf of the
Company  by  such  persons  as,  at the  actual  date of the  execution  of such
Debenture,  shall be the proper officers of the Company, although at the date of
the execution of this Indenture any such person was not such an officer.


                                        8

<PAGE>

                  Section  2.5   Exchange  and   Registration   of  Transfer  of
Debentures; Restrictions on Transfer.

                  (a) The Company shall cause to be kept at the Corporate  Trust
Office of the Trustee a register (the register  maintained in such office and in
any other  office or agency of the  Company  designated  pursuant to Section 4.2
being herein sometimes  collectively referred to as the "Debenture register") in
which, subject to such reasonable  regulations as it may prescribe,  the Company
shall provide for the registration of Debentures and of transfers of Debentures.
Such Debenture register shall be in written form or in any form capable of being
converted  into written form within a reasonable  period of time. The Trustee is
hereby appointed "Debenture registrar" for the purpose of registering Debentures
and transfers of Debentures as herein  provided.  The Company may appoint one or
more co-registrars.

                  Upon surrender for  registration  of transfer of any Debenture
to  the  Debenture  registrar  or  any  co-registrar  and  satisfaction  of  the
requirements  for such transfer set forth in this Section 2.5, the Company shall
execute, and the Trustee shall authenticate and make available for delivery,  in
the name of the designated transferee or transferees, one or more new Debentures
of any authorized  denominations  and of a like aggregate  principal  amount and
bearing such legends as may be required by Section 2.5(b).

                  Debentures  may  be  exchanged  for  other  Debentures  of any
authorized  denominations  and  of  a  like  aggregate  principal  amount,  upon
surrender  of the  Debentures  to be  exchanged  at any such  office or  agency.
Whenever any  Debentures  are so  surrendered  for  exchange,  the Company shall
execute, and the Trustee shall authenticate and make available for delivery, the
Debentures that the  Debentureholder  making the exchange is entitled to receive
bearing certificate numbers not contemporaneously outstanding.

                  All Debentures  presented or surrendered  for  registration of
transfer or for exchange shall (if so required by the Company,  the Trustee, the
Debenture registrar or any co-registrar) be duly endorsed,  or be accompanied by
a written  instrument of transfer in form satisfactory to the Company,  executed
by the Debentureholder thereof or his attorney duly authorized in writing.

                  A   reasonable   service   charge  shall  be  charged  to  the
Debentureholder for any exchange or registration of transfer of Debentures,  and
the  Company  may  require  payment  of a  sum  sufficient  to  cover  any  tax,
assessments  or other  governmental  charges  that may be imposed in  connection
therewith.

                  None of the Company,  the Trustee,  the Debenture registrar or
any co-registrar shall be required to exchange or register a transfer of (a) any
Debentures  for a period of 15 days next  preceding  the  mailing of a notice of
redemption,  (b) any  Debentures  called for  redemption or, if a portion of any
Debenture is selected or called for redemption, such portion thereof selected or
called for  redemption,  (c) any Debentures  surrendered for conversion or, if a
portion of any Debenture is surrendered  for  conversion,  such portion  thereof
surrendered for conversion.

                                        9

<PAGE>

                  All  Debentures  issued  upon  any  transfer  or  exchange  of
Debentures  shall be the valid  obligations of the Company,  evidencing the same
debt and entitled to the same benefits  under this  Indenture as the  Debentures
surrendered upon such registration of transfer or exchange. All Debentures,  the
transfer,  exchange  and/or  registration of which is effectuated by the Trustee
pursuant to this Section 2.5, shall be  accompanied by an Officers'  Certificate
of the Company, executed by a Responsible Officer thereof,  certifying that such
transfer,  exchange  and/or  registration  is  authorized  by  the  Company  and
permitted hereunder.

                  (b) Every  Debenture  that  bears or is  required  under  this
Section  2.5(b) to bear the legend set forth in this  Section  2.5(b)  (together
with any Common Stock issued upon  conversion  of the  Debenture and required to
bear the legend  set forth in  Section  2.5(c),  collectively,  the  "Restricted
Securities")  shall be subject to the restrictions on transfer set forth in this
Section 2.5(b),  unless such  restrictions on transfer shall have been waived by
the written  consent of the Company or removed in accordance with the provisions
of Section  2.5(d),  and the holder of each such  Restricted  Security,  by such
holder's  acceptance  thereof,  agrees  to be  bound  by  such  restrictions  on
transfer.  As used in this Section 2.5(b),  the term "transfer"  encompasses any
sale, pledge, transfer or other disposition of any Restricted Security.

                  Any  certificate  evidencing any Debenture (and all securities
issued in exchange therefor or substitution thereof, other than Common Stock, if
any,  issued upon conversion  thereof,  which shall bear the legend set forth in
Section  2.5(c),  if  applicable)  shall  bear a  legend  in  substantially  the
following form,  unless  otherwise agreed by the Company (with notice thereof to
the Trustee):

         THE DEBENTURE  EVIDENCED  HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S.
         SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
         SECURITIES  LAWS,  AND MAY NOT BE  OFFERED  OR SOLD  WITHIN  THE UNITED
         STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.  PERSONS EXCEPT AS
         SET FORTH IN THE FOLLOWING SENTENCE.  BY ACQUISITION HEREOF, THE HOLDER
         (1) REPRESENTS  THAT (A) IT IS AN "ACCREDITED  INVESTOR" (AS DEFINED IN
         RULE 501(a) UNDER THE SECURITIES ACT)  ("ACCREDITED  INVESTOR") AND (B)
         IT IS NOT A U.S. PERSON AND IS ACQUIRING THE DEBENTURE EVIDENCED HEREBY
         IN AN  OFFSHORE  TRANSACTION;  (2)  AGREES  THAT IT WILL NOT  RESELL OR
         OTHERWISE  TRANSFER THE DEBENTURE  EVIDENCED HEREBY OR THE COMMON STOCK
         ISSUABLE UPON CONVERSION OF SUCH DEBENTURE EXCEPT (A) TO THE COMPANY OR
         ANY  SUBSIDIARY  THEREOF,  (B) TO A  QUALIFIED  INSTITUTIONAL  BUYER IN
         COMPLIANCE  WITH  RULE  144A  UNDER  THE  SECURITIES  ACT,  (C)  TO  AN
         ACCREDITED  INVESTOR  THAT,  PRIOR  TO  SUCH  TRANSFER,   FURNISHES  TO
         ETABLISSEMENT  POUR LE PLACEMENT  PRIVE,  AS TRUSTEE,  A SIGNED  LETTER
         CONTAINING  CERTAIN  REPRESENTATIONS  AND  AGREEMENTS  RELATING  TO THE
         RESTRICTIONS ON TRANSFER OF THE DEBENTURE EVIDENCED HEREBY (THE FORM OF
         WHICH  LETTER  CAN  BE   OBTAINED  FROM  SUCH  TRUSTEE),  (D)   OUTSIDE

                                       10

<PAGE>

         THE UNITED STATES IN COMPLIANCE WITH RULE 903 OR RULE 904 OF REGULATION
         S  UNDER  THE  SECURITIES  ACT,  (E)  PURSUANT  TO THE  EXEMPTION  FROM
         REGISTRATION  PROVIDED  BY  RULE  144  UNDER  THE  SECURITIES  ACT  (IF
         AVAILABLE) OR (F) PURSUANT TO A REGISTRATION  STATEMENT  WHICH HAS BEEN
         DECLARED  EFFECTIVE  UNDER THE  SECURITIES  ACT; AND (3) AGREES THAT IT
         WILL DELIVER TO EACH PERSON TO WHOM THE DEBENTURE  EVIDENCED  HEREBY IS
         TRANSFERRED  A NOTICE  SUBSTANTIALLY  TO THE EFFECT OF THIS LEGEND.  IN
         CONNECTION  WITH ANY TRANSFER OF THE DEBENTURE  EVIDENCED  HEREBY,  THE
         HOLDER MUST CHECK THE  APPROPRIATE  BOX SET FORTH ON THE REVERSE HEREOF
         RELATING TO THE MANNER OF SUCH TRANSFER AND SUBMIT THIS  CERTIFICATE TO
         ETABLISSEMENT  POUR LE  PLACEMENT  PRIVE,  AS TRUSTEE.  IF THE PROPOSED
         TRANSFER IS PURSUANT TO CLAUSE (C), (D) OR (E) ABOVE,  THE HOLDER MUST,
         PRIOR TO SUCH  TRANSFER,  FURNISH TO  ETABLISSEMENT  POUR LE  PLACEMENT
         PRIVE,  AS  TRUSTEE,  SUCH  CERTIFICATIONS,  LEGAL  OPINIONS  OR  OTHER
         INFORMATION AS THE COMPANY MAY REASONABLY  REQUIRE TO CONFIRM THAT SUCH
         TRANSFER  IS  BEING  MADE  PURSUANT  TO  AN  EXEMPTION  FROM,  OR  IN A
         TRANSACTION  NOT  SUBJECT  TO,  THE  REGISTRATION  REQUIREMENTS  OF THE
         SECURITIES  ACT.  AS USED  HEREIN,  THE TERMS  "OFFSHORE  TRANSACTION,"
         "UNITED  STATES" AND "U.S.  PERSON" HAVE THE MEANINGS  GIVEN TO THEM BY
         REGULATION S UNDER THE SECURITIES ACT.

                  Any Debenture (or security  issued in exchange or substitution
therefor)  as to which such  restrictions  on  transfer  shall  have  expired in
accordance  with their  terms may,  upon  satisfaction  of the  requirements  of
Section  2.5(d) and  surrender of such  Debenture  for exchange to the Debenture
registrar in  accordance  with the  provisions of this Section 2.5, be exchanged
for a new Debenture or Debentures, of like tenor and aggregate principal amount,
which shall not bear the restrictive legend required by this Section 2.5(b).

                  (c) Any stock  certificate  representing  Common  Stock issued
upon  conversion  of any  Debenture  shall  bear a legend in  substantially  the
following  form,  unless  otherwise  agreed by the Company (with written  notice
thereof to the Trustee and any transfer agent for the Common Stock):

         THE COMMON STOCK  EVIDENCED  HEREBY HAS NOT BEEN  REGISTERED  UNDER THE
         U.S.  SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY
         STATE SECURITIES LAWS, AND MAY NOT BE OFFERED OR SOLD WITHIN THE UNITED
         STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.  PERSONS EXCEPT AS
         SET FORTH IN THE FOLLOWING SENTENCE.  THE HOLDER HEREOF AGREES THAT (1)
         IT WILL NOT RESELL OR OTHERWISE  TRANSFER  THE COMMON  STOCK  EVIDENCED
         HEREBY EXCEPT (A) TO THE  COMPANY OR ANY  SUBSIDIARY  THEREOF, (B) TO A

                                       11

<PAGE>

         "QUALIFIED  INSTITUTIONAL  BUYER"  (AS  DEFINED  IN RULE 144A UNDER THE
         SECURITIES  ACT) IN COMPLIANCE  WITH RULE 144A,  (C) TO AN  "ACCREDITED
         INVESTOR"  (AS DEFINED IN RULE 501(a)  UNDER THE  SECURITIES  ACT) THAT
         PRIOR TO SUCH TRANSFER,  FURNISHES TO THE COMPANY'S  TRANSFER AGENT FOR
         ITS COMMON STOCK, A SIGNED LETTER  CONTAINING  CERTAIN  REPRESENTATIONS
         AND AGREEMENTS  RELATING TO THE  RESTRICTIONS ON TRANSFER OF THE COMMON
         STOCK  EVIDENCED  HEREBY (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM
         SUCH TRANSFER AGENT),  (D) OUTSIDE THE UNITED STATES IN COMPLIANCE WITH
         RULE 903 OR 904 OF REGULATION S UNDER THE SECURITIES  ACT, (E) PURSUANT
         TO THE  EXEMPTION  FROM  REGISTRATION  PROVIDED  BY RULE 144  UNDER THE
         SECURITIES  ACT  (IF  AVAILABLE)  OR  (F)  PURSUANT  TO A  REGISTRATION
         STATEMENT  WHICH HAS BEEN DECLARED  EFFECTIVE UNDER THE SECURITIES ACT;
         (2)  PRIOR TO ANY SUCH  TRANSFER  PURSUANT  TO CLAUSE  (C),  (D) OR (E)
         ABOVE,  IT WILL  FURNISH  TO THE  COMPANY'S  TRANSFER  AGENT FOR COMMON
         STOCK, SUCH CERTIFICATIONS,  LEGAL OPINIONS OR OTHER INFORMATION AS THE
         COMPANY MAY  REASONABLY  REQUIRE TO CONFIRM THAT SUCH TRANSFER IS BEING
         MADE PURSUANT TO AN EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO,
         THE  REGISTRATION  REQUIREMENTS  OF THE SECURITIES ACT; AND (3) IT WILL
         DELIVER TO EACH  PERSON TO WHOM THE COMMON  STOCK  EVIDENCED  HEREBY IS
         TRANSFERRED A NOTICE  SUBSTANTIALLY TO THE EFFECT OF THIS LEGEND.  THIS
         LEGEND WILL BE REMOVED UPON THE SATISFACTION OF THE TRANSFER AGENT THAT
         THE COMMON STOCK EVIDENCED HEREBY HAS BEEN OR IS BEING OFFERED AND SOLD
         PURSUANT TO AN EFFECTIVE  REGISTRATION  STATEMENT OR IN ACCORDANCE WITH
         RULE 144 OR RULE 903 OR RULE 904 OF  REGULATION S UNDER THE  SECURITIES
         ACT. AS USED HEREIN,  THE TERMS "UNITED STATES" AND "U.S.  PERSON" HAVE
         THE MEANINGS GIVEN TO THEM BY REGULATION S UNDER THE SECURITIES ACT.

                  Any  such  Common  Stock  as to  which  such  restrictions  on
transfer   shall  have  expired  in  accordance   with  their  terms  may,  upon
satisfaction  of  the  requirements  of  Section  2.5(d)  and  surrender  of the
certificates representing such shares of Common Stock for exchange in accordance
with the procedures of the transfer agent for the Common Stock, be exchanged for
a new  certificate  or  certificates  for a like  aggregate  number of shares of
Common  Stock,  which  shall not bear the  restrictive  legend  required by this
Section 2.5(c).

                  (d) Upon any sale or transfer of any  Restricted  Security (i)
that is  effected  pursuant to an  effective  registration  statement  under the
Securities Act, (ii) that is effected  pursuant to Rule 144 as promulgated under
the  Securities  Act as  determined  by  counsel  to the  Company  or  (iii)  in
connection  with which the Trustee (or transfer  agent for the Common Stock,  in
the case of shares of Common Stock) receives  certificates and other information
(including  an opinion of counsel,  if requested)  reasonably  acceptable to the

                                       12

<PAGE>


Company  to the  effect  that such  security  shall no longer be  subject to the
resale  restrictions under federal and state securities laws, then the Debenture
registrar or co-registrar (or transfer agent, in the case of Common Stock) shall
permit the holder  thereof to exchange such  Restricted  Security for a security
that  does not bear the  legends  set forth in  Section  2.5(b)  or  2.5(c),  as
applicable,  and shall rescind any such  restrictions on transfer.  In addition,
any  Debenture  (or  security  issued in exchange or  substitution  therefor) or
shares of Common Stock issued upon conversion of any Debenture,  in either case,
as to which the  restrictions on transfer  described in the legends set forth in
Section 2.5(b) and 2.5(c), respectively,  have expired by their terms, may, upon
surrender thereof (in accordance with the terms of this Indenture in the case of
Debentures)  together with such certifications and other information  (including
an  opinion of counsel  having  substantial  experience  in  practice  under the
Securities Act and otherwise reasonably acceptable to the Company,  addressed to
the  Company and the Trustee and in a form  acceptable  to the  Company,  to the
effect that the transfer of such Restricted Security has been made in compliance
with  Rule  144 or  such  successor  provision)  acceptable  to the  Company  be
exchanged  for a new  Debenture  or  Debentures  of  like  tenor  and  aggregate
principal  amount  (in  the  case  of  Debentures),  or  a  new  certificate  or
certificates  for a like aggregate number of shares of Common Stock (in the case
of Common Stock),  or a new  certificate  or other  instrument of like tenor and
amount  (in the case of  securities  issued  in  exchange  or  substitution  for
Debentures),  which shall not bear the restrictive legends set forth in Sections
2.5(b) and 2.5(c).

                  (e) Each  holder or former  holder  of a  Debenture  agrees to
indemnify the Company and the Trustee against any liability that may result from
the  transfer,  exchange  or  assignment  of such  holder's  or former  holder's
Debenture in violation of any provision of this Indenture and/or applicable U.S.
federal or state securities law.

                  Section 2.6 Mutilated,  Destroyed,  Lost or Stolen Debentures.
In case any Debenture  shall become  mutilated or be destroyed,  lost or stolen,
the Company in its discretion may execute,  and upon its request, the Trustee or
an  authenticating  agent appointed by the Trustee shall  authenticate  and make
available  for delivery a new Debenture  bearing a number not  contemporaneously
outstanding in exchange and substitution for the mutilated  Debenture or in lieu
of and in  substitution  for the  Debenture so  destroyed,  lost or stolen.  The
Company may charge such applicant for the expenses of the Company in replacing a
Debenture. In every case the applicant for a substituted Debenture shall furnish
to the Company, to the Trustee and, if applicable,  to such authenticating agent
such  security  or  indemnity  as may be  required  by them to save each of them
harmless from any loss,  liability,  cost or expense caused by or connected with
such  substitution,  and in  every  case  of  destruction,  loss or  theft,  the
applicant shall also furnish to the Company,  to the Trustee and, if applicable,
to such authenticating  agent evidence to their satisfaction of the destruction,
loss or theft of such Debenture and of the ownership thereof.

                  The Trustee or such authenticating  agent may authenticate any
such  substituted  Debenture  and  deliver  the same  upon the  receipt  of such
security or  indemnity  as the Trustee,  the Company  and, if  applicable,  such
authenticating  agent  may  require.   Upon  the  issuance  of  any  substituted
Debenture, the Company may require the payment of a sum sufficient to  cover any

                                       13
<PAGE>


tax or other governmental charge that may be imposed in relation thereto and any
other expenses connected therewith. In case any Debenture that has matured or is
about to mature or has been called for  redemption or is about to be repurchased
or converted  into Common Stock or cash shall become  mutilated or be destroyed,
lost or stolen, the Company may, instead of issuing a substitute Debenture,  pay
or authorize the payment of or convert or authorize  the  conversion of the same
(without surrender thereof, except in the case of a mutilated Debenture), as the
case may be, if the applicant  for such payment or  conversion  shall furnish to
the Company,  to the Trustee and, if applicable,  to such  authenticating  agent
such  security  or  indemnity  as may be  required  by them to save each of them
harmless from any loss,  liability,  cost or expense caused by or connected with
such  substitution,  and  in  case  of  destruction,  loss  or  theft,  evidence
satisfactory to the Company, the Trustee and, if applicable, any paying agent or
conversion agent of the destruction,  loss or theft of such Debenture and of the
ownership thereof.

                  Every  substitute  Debenture issued pursuant to the provisions
of this Section 2.6 in lieu of any Debenture  that is destroyed,  lost or stolen
shall constitute an additional contractual obligation of the Company, whether or
not the destroyed,  lost or stolen Debenture shall be enforceable by anyone, and
shall be  entitled  to all the  benefits  of (but  shall be  subject  to all the
limitations set forth in) this Indenture  equally and  proportionately  with any
and all other Debentures duly issued hereunder.  To the extent permitted by law,
all  Debentures  shall be held and owned  upon the  express  condition  that the
foregoing provisions are exclusive with respect to the replacement or payment or
conversion of mutilated, destroyed, lost or stolen Debentures and shall preclude
any and all other rights or remedies notwithstanding any law or statute existing
or hereafter  enacted to the contrary with respect to the replacement or payment
or  conversion  of  negotiable  instruments  or other  securities  without their
surrender.

                  Section 2.7 Temporary  Debentures.  Pending the preparation of
definitive   Debentures,   the  Company  may  execute  and  the  Trustee  or  an
authenticating agent appointed by the Trustee shall, upon written request of the
Company,  authenticate  and make  available  for delivery  temporary  Debentures
(printed  or  lithographed).  Temporary  Debentures  shall  be  issuable  in any
authorized denomination and shall be substantially in the form of the definitive
Debentures  but  with  such  omissions,  insertions  and  variations  as  may be
appropriate for temporary  Debentures,  all as may be determined by the Company.
Every  such   temporary   Debenture   shall  be  executed  by  the  Company  and
authenticated  by the  Trustee  or  such  authenticating  agent  upon  the  same
conditions and in substantially  the same manner,  and with the same effect,  as
the definitive Debentures.  Without unreasonable delay the Company shall execute
and deliver to the Trustee or such  authenticating  agent definitive  Debentures
and thereupon any or all temporary  Debentures  may be  surrendered  in exchange
therefor, at each office or agency maintained by the Company pursuant to Section
4.2 and the Trustee or such  authenticating  agent shall  authenticate  and make
available  for  delivery  in exchange  for such  temporary  Debentures  an equal
aggregate principal amount of definitive Debentures. Such exchange shall be made
by the Company at its own expense  and  without  any charge  therefor.  Until so
exchanged,  the  temporary  Debentures  shall in all respects be entitled to the

                                       14
<PAGE>

same  benefits  and  subject to the same  limitations  under this  Indenture  as
definitive Debentures authenticated and delivered hereunder.

                  Section  2.8   Cancellation  of  Debentures   Paid,  Etc.  All
Debentures  surrendered  for the  purpose of  payment,  redemption,  repurchase,
conversion,  exchange or  registration  of transfer shall, if surrendered to the
Company or any paying agent or any Debenture  registrar or any conversion agent,
be surrendered to the Trustee and promptly  canceled by it or, if surrendered to
the Trustee,  shall be promptly canceled by it and no Debentures shall be issued
in lieu thereof  except as expressly  permitted by any of the provisions of this
Indenture.  If  required  by the  Company,  the Trustee  shall  return  canceled
Debentures to the Company.  If the Company shall acquire any of the  Debentures,
such  acquisition  shall not  operate as a  redemption  or  satisfaction  of the
indebtedness  represented  by such  Debentures  unless  and  until  the same are
delivered to the Trustee for cancellation.

                  Section  2.9  CUSIP  Numbers.   The  Company  in  issuing  the
Debentures may use "CUSIP"  numbers (if then generally in use),  and, if so, the
Trustee shall use CUSIP  numbers in notices of  redemption  as a convenience  to
holders;  provided that any such notice may state that no representation is made
as to the  correctness of such numbers either as printed on the Debentures or as
contained in any notice of a redemption  and that reliance may be placed only on
the  other  identification  numbers  printed  on the  Debentures,  and any  such
redemption  shall not be affected by any defect in or omission of such  numbers.
The  Company  shall  promptly  notify  the  Trustee  of any  change in the CUSIP
numbers.


                                   ARTICLE III

                     REDEMPTION AND REPURCHASE OF DEBENTURES


                  Section  3.1  Redemption   Prices.   The  Debentures  are  not
redeemable  at the option of the Company prior to March 31, 1999. At any time on
or after that date, the Debentures may be redeemed at the Company's option, upon
notice as set forth in Section 3.2, in whole at any time or in part from time to
time,  at 100% plus  accrued  and  unpaid  interest  thereon  to the  applicable
redemption date.

                  Section 3.2 Notice of Redemption;  Selection of Debentures. In
case the Company  shall  desire to  exercise  the right to redeem all or, as the
case may be, any part of the Debentures  pursuant to Section 3.1, it shall fix a
date for redemption and, in the case of any redemption  pursuant to Section 3.1,
it or, at its written  request  accompanied  by the  proposed  form of notice of
redemption (which must be received by the Trustee at least ten days prior to the
date the  Trustee is  requested  to give  notice as  described  below,  unless a
shorter  period is agreed to by the Trustee),  the Trustee in the name of and at
the  expense of the  Company,  shall mail or cause to be mailed a notice of such
redemption  at least 30 and not more  than 60 days  prior to the date  fixed for

                                       15

<PAGE>

redemption  to the holders of Debentures so to be redeemed as a whole or in part
at their last addresses as the same appear on the Debenture  register,  provided
that subject to the approval of the form of notice by the Trustee if the Company
shall  give such  notice,  it shall  also give such  notice,  and  notice of the
Debentures to be redeemed,  to the Trustee. Such mailing shall be by first class
mail. The notice, if mailed in the manner herein provided, shall be conclusively
presumed  to have been duly  given,  whether  or not the  holder  receives  such
notice.  In any case,  failure to give such  notice by mail or any defect in the
notice to the holder of any Debenture designated for redemption as a whole or in
part shall not affect the validity of the  proceedings for the redemption of any
other Debenture.

                  Each such notice of redemption  shall  identify the Debentures
to be redeemed (including CUSIP numbers), specify the aggregate principal amount
of  Debentures to be redeemed,  the date fixed for  redemption,  the  redemption
price at which  Debentures  are to be redeemed,  the place or places of payment,
that payment shall be made upon  presentation  and surrender of such Debentures,
that  interest  accrued  to the  date  fixed  for  redemption  shall  be paid as
specified in said notice and that on and after said date, interest thereon or on
the portion thereof to be redeemed shall cease to accrue. Such notice shall also
state the  current  Conversion  Price and the date on which the right to convert
such  Debentures or portions  thereof into Common Stock shall  expire.  If fewer
than all the  Debentures  are to be  redeemed,  the notice of  redemption  shall
identify the Debentures to be redeemed.  In case any Debenture is to be redeemed
in part only, the notice of redemption  shall state the portion of the principal
amount  thereof to be redeemed  and shall state that on and after the date fixed
for redemption,  upon surrender of such Debenture, a new Debenture or Debentures
in principal amount equal to the unredeemed portion thereof shall be issued.

                  On or prior to the Business Day prior to the  redemption  date
specified in the notice of redemption given as provided in this Section 3.2, the
Company shall deposit with the Trustee or with one or more paying agents (or, if
the Company is acting as its own paying agent, set aside,  segregate and hold in
trust as provided in Section 4.4) an amount of money sufficient to redeem on the
redemption  date all the Debentures so called for  redemption  (other than those
theretofore  surrendered  for  conversion  into  Common  Stock  or  cash) at the
appropriate  redemption price,  together with accrued interest to the date fixed
for  redemption.  If any Debenture  called for redemption is converted  pursuant
hereto,  any  money  deposited  with  the  Trustee  or any  paying  agent  or so
segregated and held in trust for the redemption of such Debenture  shall be paid
to the Company upon its written  request or, if then held by the Company,  shall
be  discharged  from such  trust.  If fewer  than all the  Debentures  are to be
redeemed,  the Company shall give the Trustee  written  notice in the form of an
Officers'  Certificate not fewer than 45 days (or such shorter period of time as
may be  acceptable  to the  Trustee)  prior  to the  redemption  date  as to the
aggregate principal amount of Debentures to be redeemed.

                  If  fewer  than all the  Debentures  are to be  redeemed,  the
Trustee  shall  select the  Debentures  or portions  thereof to be redeemed  (in
principal amounts of $1,000 or integral  multiples  thereof),  by lot or, in its
discretion,  on a  pro  rata  basis.  If  any  Debenture  selected  for  partial
redemption is converted in part after such selection,  the converted  portion of

                                       16
<PAGE>

such  Debenture  shall  be  deemed  (so far as may be) to be the  portion  to be
selected for redemption.  The Debentures (or portions thereof) so selected shall
be deemed duly selected for redemption for all purposes hereof,  notwithstanding
that any such Debenture is converted as a whole or in part before the mailing of
the notice of redemption.

                  Upon any redemption of less than all  Debentures,  the Company
and the  Trustee  may  treat  as  outstanding  any  Debentures  surrendered  for
conversion  during the period of 15 days next  preceding the mailing of a notice
of redemption and need not treat as outstanding any Debenture  authenticated and
delivered  during  such period in exchange  for the  unconverted  portion of any
Debenture converted in part during such period.

                  Section 3.3 Payment of Debentures  Called for  Redemption.  If
notice of redemption has been given as above provided, the Debentures or portion
of  Debentures  with respect to which such notice has been given  shall,  unless
converted into Common Stock pursuant to the terms hereof, become due and payable
on the date and at the place or places  stated in such notice at the  applicable
redemption  price,  together with interest thereon accrued to the date fixed for
redemption,  and on and after said date (unless the Company shall default in the
payment of such  Debentures  at the  redemption  price,  together  with interest
thereon  accrued  to said  date),  interest  on the  Debentures  or  portion  of
Debentures so called for redemption  shall cease to accrue,  and such Debentures
shall cease after the close of business on the Business Day next  preceding  the
date fixed for  redemption  to be  convertible  into  Common  Stock or cash and,
except as provided in  Sections  7.5 and 12.4,  to be entitled to any benefit or
security under this  Indenture,  and the holders  thereof shall have no right in
respect of such  Debentures  except the right to receive  the  redemption  price
thereof  and  unpaid  interest  thereon  to the date  fixed for  redemption.  On
presentation  and  surrender  of such  Debentures  at a place of payment in said
notice specified, the said Debentures or the specified portions thereof shall be
paid and redeemed by the Company at the applicable  redemption  price,  together
with interest  accrued thereon to the date fixed for  redemption;  provided that
any  semi-annual  payment  of  interest  becoming  due on  the  date  fixed  for
redemption shall be payable to the holders of such Debentures registered as such
on the relevant  record date subject to the terms and  provisions of Section 2.3
hereof.

                  Upon presentation of any Debenture  redeemed in part only, the
Company shall execute and the Trustee shall  authenticate and make available for
delivery to the holder thereof,  at the expense of the Company,  a new Debenture
or Debentures,  of authorized  denominations,  in principal  amount equal to the
unredeemed portion of the Debentures so presented.

                  If any Debenture  called for  redemption  shall not be so paid
upon surrender thereof for redemption, the principal and premium, if any, shall,
until  paid or duly  provided  for,  bear  interest  from  the  date  fixed  for
redemption at the rate borne by the Debenture  and such  Debenture  shall remain
convertible  into Common Stock until the  principal and premium,  if any,  shall
have been paid or duly provided for.

                                       17

<PAGE>

                                   ARTICLE IV

                       PARTICULAR COVENANTS OF THE COMPANY


                  Section 4.1 Payment of Principal,  Premium and  Interest.  The
Company  covenants and agrees that it shall duly and  punctually pay or cause to
be paid the  principal  of and  premium,  if any,  and  interest  on each of the
Debentures at the places,  at the  respective  times and in the manner  provided
herein and in the Debentures. Each installment of interest on the Debentures due
on any semi-annual  interest  payment date may be paid by mailing checks for the
interest  payable to or upon the  written  order of the  holders  of  Debentures
entitled thereto as they shall appear on the Debenture register.  An installment
of principal or interest shall be considered paid on the date due if the Trustee
or paying  agent (other than the  Company,  a  Subsidiary  of the Company or any
Affiliate of any of them) holds on that date money designated for and sufficient
to pay the  installment  of  principal or interest  and is not  prohibited  from
paying such money to the holders of the Debentures pursuant to the terms of this
Indenture.

                  Section 4.2 Maintenance of Office or Agency. The Company shall
maintain  an office  or  agency  where the  Debentures  may be  surrendered  for
registration  of transfer or  exchange  or for  presentation  for payment or for
conversion,  redemption or  repurchase  and where notices and demands to or upon
the Company in respect of the Debentures  and this Indenture may be served.  The
Company shall give prompt written notice to the Trustee of the location, and any
change in the  location,  of such  office or agency.  If at any time the Company
shall fail to  maintain  any such  office or agency or shall fail to furnish the
Trustee with the address thereof,  such presentations,  surrenders,  notices and
demands may be made or served at the Corporate Trust Office of the Trustee.

                  The Company may also from time to time  designate  one or more
other offices or agencies  where the  Debentures may be presented or surrendered
for  any  or  all  such  purposes  and  may  from  time  to  time  rescind  such
designations. The Company shall give prompt written notice to the Trustee of any
such  designation  or  rescission  and of any change in the location of any such
other office or agency.

                  The Company hereby initially  designates Von Graffenreid AG as
paying agent and the Trustee as Debenture registrar and conversion agent and the
offices of the Trustee in Zurich,  Switzerland or the office of the Paying Agent
located in Berne,  Switzerland  as offices or  agencies  of the  Company for the
purposes set forth in this Section 4.2.

                  So long as the Trustee is the Debenture registrar, the Trustee
agrees to mail, or cause to be mailed, the notices set forth in Section 7.8(a).

                  Section  4.3  Appointments  to  Fill  Vacancies  in  Trustee's
Office. The Company, whenever necessary to avoid or fill a vacancy in the office

                                       18
<PAGE>

of Trustee,  shall appoint, in the manner provided in Section 7.8, a Trustee, so
that there shall at all times be a Trustee hereunder.

                  Section 4.4       Provisions as to Paying Agent.

                  (a) The Paying Agent agrees  subject to the provisions of this
Section 4.4:

                  (1) that it shall  hold all sums held by it as such  agent for
         the payment of the  principal of,  premium,  if any, or interest on the
         Debentures (whether such sums have been paid to it by the Company or by
         any other  obligor on the  Debentures)  in trust for the benefit of the
         holders of the Debentures;

                  (2)  that it shall  give the  Trustee  written  notice  of any
         failure by the Company (or by any other obligor on the  Debentures)  to
         make any payment of the principal of,  premium,  if any, or interest on
         the Debentures when the same shall be due and payable; and

                  (3) that at any time  during  the  continuance  of an Event of
         Default,  upon request of the Trustee,  it shall  forthwith  pay to the
         Trustee all sums so held in trust.

                  The Company  shall,  before each due date of the principal of,
premium, if any, or interest on the Debentures,  deposit with the Paying Agent a
sum sufficient to pay such principal,  premium, if any, or interest, and (unless
such paying agent is the Trustee) the Company shall promptly  notify the Trustee
of any failure to take such action.

                  (b) If the  Company  shall  act as its own  paying  agent,  it
shall,  on or before  each due date of the  principal  of,  premium,  if any, or
interest  on the  Debentures,  set  aside,  segregate  and hold in trust for the
benefit of the holders of the Debentures a sum sufficient to pay such principal,
premium, if any, or interest so becoming due and shall notify the Trustee of any
failure to take such  action and of any  failure  by the  Company  (or any other
obligor under the  Debentures) to make any payment of the principal of, premium,
if any,  or  interest  on the  Debentures  when the same  shall  become  due and
payable.

                  (c)   Anything   in   this   Section   4.4  to  the   contrary
notwithstanding,  the Company  may, at any time,  for the purpose of obtaining a
satisfaction  and discharge of this Indenture,  or for any other reason,  pay or
cause to be paid to the  Trustee  all sums held in trust by the  Company  or any
paying agent  hereunder as required by this Section 4.4, such sums to be held by
the  Trustee  upon the  trusts  herein  contained  and upon such  payment by the
Company or any paying  agent to the  Trustee,  the Company or such paying  agent
shall be released from all further liability with respect to such sums.

                  (d)   Anything   in   this   Section   4.4  to  the   contrary
notwithstanding, the agreement to hold sums in trust as provided in this Section
4.4 is subject to Sections 12.3 and 12.4.

                                       19
<PAGE>

                  Section 4.5  Corporate  Existence.  Subject to Article XI, the
Company  shall do or cause to be done all things  necessary to preserve and keep
in full  force  and  effect  (i) its  corporate  existence,  and the  corporate,
partnership or other  existence of any Subsidiary of the Company,  in accordance
with the  respective  organizational  documents (as the same may be amended from
time to time) of the Company or any such Subsidiary and (ii) the rights (charter
and  statutory),  licenses and  franchises of the Company and its  Subsidiaries;
provided  that the Company  shall not be  required  to preserve  any such right,
license or franchise, or the corporate, partnership or other existence of any of
its Subsidiaries if the Board of Directors shall determine that the preservation
thereof is no longer desirable in the conduct of the business of the Company and
its Subsidiaries,  taken as a whole, and that the loss thereof is not materially
adverse to the holders of the Debentures.

                  Section  4.6 Stay,  Extension  and  Usury  Laws.  The  Company
covenants  (to the extent  that it may  lawfully do so) that it shall not at any
time insist upon, plead or in any manner whatsoever claim or take the benefit or
advantage of, any stay,  extension or usury law or other law that would prohibit
or forgive the Company  from  paying all or any portion of the  principal  of or
interest on the Debentures as contemplated  herein,  wherever enacted, now or at
any time hereafter in force, or that may affect the covenants or the performance
of this Indenture;  and the Company (to the extent it may lawfully do so) hereby
expressly waives all benefit or advantage of any such law, and covenants that it
shall not, by resort to any such law,  hinder,  delay or impede the execution of
any power  herein  granted  to the  Trustee,  but shall  suffer  and  permit the
execution of every such power as though no such law has been enacted.

                  Section 4.7 Sale of Inventory. In the event the Company or its
subsidiary,  in a bulk sale transaction,  sells its entire existing inventory of
spare parts  purchased from Douglas  Aircraft  Corporation  pursuant to contract
numbers DAC 88-28-D, DAC 91-03-P and DAC 91- 04-P (the "Inventory"), the Company
shall  deposit,  within 90 days of such  sale,  in an account  specified  by the
Trustee,  50% of the net proceeds of such sale, after deducting all amounts paid
or  payable  to  any  lender  having  a  security  interest  in  such  inventory
(regardless  of the  amount of loan  secured by the  Inventory),  and all costs,
expenses and taxes of the Company,  incurred in any way in  connection  with the
sale,  provided  that 50% of such net proceeds  exceeds  $300,000  (the "Minimum
Proceeds").

                  The Company shall give written  notice to the Trustee and each
Debentureholder of the sale of Inventory resulting in the receipt by the Company
of  the  Minimum  Proceeds,   by  first-class  mail,  postage  prepaid,  at  the
Debentureholder's  address appearing in the Debenture registrar,  within 45 days
of the sale,  stating,  among other  things,  that (i) a sale of  Inventory  has
occurred and (ii) 50% of the amount of such net proceeds  will be used to redeem
the Debentures at 100% of their principal  amount,  plus accrued interest to the
redemption  date, on a pro rata basis in accordance  with Article III, unless at
least 66 2/3% of the Debentureholders  consent (evidenced as provided in Article
VIII), within 30 days of such notice to allow the Company to retain the proceeds
for working capital purposes.

                                       20

<PAGE>

                                    ARTICLE V

                             DEBENTUREHOLDERS' LISTS


                  Section  5.1   Debentureholders'   Lists.  The  Trustee  shall
preserve in as current a form as is reasonably  practicable the most recent list
available  to it of the names and  addresses  of holders of  Debentures.  If the
Trustee is not the Debenture registrar, the Company shall furnish to the Trustee
and  Paying  Agent on or before at least  seven  Business  Days  preceding  each
interest  payment  date and at such other  times as the  Trustee  may request in
writing a list in such form and as of such date as the  Trustee  reasonably  may
require of the names and addresses of holders of Debentures.


                                   ARTICLE VI

                              DEFAULTS AND REMEDIES


                  Section  6.1  Events  of  Default.  In case one or more of the
following  Events of Default  (whatever the reason for such Event of Default and
whether it shall be voluntary or  involuntary or be effected by operation of law
or pursuant to any judgment,  decree or order of any court or any order, rule or
regulation of any  administrative or governmental  body) shall have occurred and
be continuing:

                  (a) default in the payment of the principal of or premium,  if
         any,  on the  Debentures  when  due at  maturity,  upon  redemption  or
         otherwise  (whether or not such payment  shall be prohibited by Article
         XV of this Indenture),  and continuance of such default for a period of
         60 days; or

                  (b) default in the payment of any  installment  of interest on
         the  Debentures  as and when  the same  shall  become  due and  payable
         (whether or not such payment  shall be prohibited by Article XV of this
         Indenture), and continuance of such default for a period of 60 days; or

                  (c) a failure on the part of the  Company  to duly  observe or
         perform any other covenants or agreements on the part of the Company in
         this Indenture  (other than a default in the performance or breach of a
         covenant or agreement that is specifically dealt with elsewhere in this
         Section 6.1) that  continues  for a period of 90 days after the date on
         which written  notice of such failure,  requiring the Company to remedy
         the same,  shall have been given to the Company by the  Trustee,  or to
         the Company and a Responsible Officer of the Trustee, by the holders of
         at least 25% in aggregate  principal  amount of the  Debentures  at the
         time outstanding determined in accordance with Section 8.4; or

                                       21
<PAGE>

                  (d) the  Company  shall  commence  a  voluntary  case or other
         proceeding  seeking  liquidation,  reorganization  or other relief with
         respect  to itself or its debts  under any  bankruptcy,  insolvency  or
         other  similar  law  now  or  hereafter  in  effect,   or  seeking  the
         appointment  of a trustee,  receiver,  liquidator,  custodian  or other
         similar  official of it or any  substantial  part of its  property,  or
         shall  consent to any such  relief or to the  appointment  of or taking
         possession  by any  such  official  in an  involuntary  case  or  other
         proceeding  commenced against it or shall make a general assignment for
         the benefit of  creditors  or shall fail  generally to pay its debts as
         they become due; or

                  (e) an involuntary case or other proceeding shall be commenced
         against the Company seeking liquidation, reorganization or other relief
         with  respect to it or its debts under any  bankruptcy,  insolvency  or
         other similar law now or hereafter in effect or seeking the appointment
         of a trustee, receiver, liquidator, custodian or other similar official
         of it or any  substantial  part of its property,  and such  involuntary
         case or other  proceeding  shall remain  undismissed and unstayed for a
         period of 60 consecutive days;

then, and in each and every such case (other than an Event of Default  specified
in Section 6.1(d) or (e)),  unless the principal of all of the Debentures  shall
have already  become due and  payable,  either the Trustee or the holders of not
less than 25% in aggregate  principal  amount of the Debentures then outstanding
hereunder determined in accordance with Section 8.4, by notice in writing to the
Company  (and to the  Trustee if given by  Debentureholders),  may  declare  the
principal  of,  premium,  if any, on the  Debentures  and the  interest  accrued
thereon to be due and payable  immediately,  and upon any such  declaration  the
same shall become and shall be  immediately  due and  payable,  anything in this
Indenture or in the Debentures contained to the contrary notwithstanding.  If an
Event of Default  specified in Section  6.1(d) or (e) occurs and is  continuing,
the principal of all the  Debentures and the interest  accrued  thereon shall be
immediately  due  and  payable.  The  foregoing  provision  is  subject  to  the
conditions that if, at any time after the principal of the Debentures shall have
been so  declared  due and  payable,  and before any  judgment or decree for the
payment of the monies due shall  have been  obtained  or entered as  hereinafter
provided,  the  Company  shall  pay or  shall  deposit  with the  Trustee  a sum
sufficient to pay all matured  installments  of interest upon all Debentures and
the principal of and premium,  if any, on any and all Debentures that shall have
become due otherwise than by acceleration (with interest on overdue installments
of interest (to the extent that payment of such  interest is  enforceable  under
applicable law) and on such principal and premium,  if any, at the rate borne by
the  Debentures,  to the date of such payment or deposit) and amounts due to the
Trustee  pursuant  to  Section  7.6,  and if any and  all  defaults  under  this
Indenture,  other than the  nonpayment  of principal  of,  premium,  if any, and
accrued interest on Debentures that shall have become due by acceleration, shall
have been cured or waived  pursuant to Section 6.7,  then and in every such case
the holders of a majority in aggregate  principal  amount of the Debentures then
outstanding,  by written notice to the Company and to the Trustee, may waive all
defaults or Events of Default and  rescind  and annul such  declaration  and its
consequences;  but no such waiver or rescission and annulment shall extend to or
shall  affect any  subsequent  default or Event of Default,  or shall impair any

                                       22

<PAGE>

right consequent thereto.  The Company shall notify a Responsible Officer of the
Trustee, promptly upon becoming aware thereof, of any Event of Default.

                  In case the Trustee shall have  proceeded to enforce any right
under  this  Indenture  and such  proceedings  shall have been  discontinued  or
abandoned  because of such waiver or  rescission  and annulment or for any other
reason or shall have been determined adversely to the Trustee, then and in every
such case the  Company,  the  holders of  Debentures  and the  Trustee  shall be
restored  respectively to their several positions and rights hereunder,  and all
rights,  remedies and powers of the Company,  the holders of Debentures  and the
Trustee shall continue as though no such proceeding had been taken.

                  Section 6.2 Payments of Debentures on Default;  Suit Therefor.
The Company covenants that (a) in case a default shall be made in the payment of
any  installment  of interest  upon any of the  Debentures  as and when the same
shall become due and payable, and such default shall have continued for a period
of 60 days, or (b) in case default shall be made in the payment of the principal
of or premium,  if any, on any of the Debentures as and when the same shall have
become due and payable,  whether at maturity of the  Debentures or in connection
with any redemption or repurchase, by declaration or otherwise, and such default
shall have continued for a period of 60 days,  then, upon demand of the Trustee,
the  Company  shall pay to the  Trustee,  for the  benefit of the holders of the
Debentures,  the whole amount that then shall have become due and payable on all
such Debentures for principal of, premium, if any, or interest,  or both, as the
case may be, with interest upon the overdue principal,  premium, if any, and (to
the extent that payment of such interest is enforceable  under  applicable  law)
upon the overdue  installments  of interest at the rate borne by the Debentures;
and, in addition  thereto,  such further  amount as shall be sufficient to cover
the costs and expenses of collection,  including reasonable  compensation to the
Trustee,  its agents,  attorneys  and counsel,  and any expenses or  liabilities
incurred by the Trustee  hereunder  other than  through  its  negligence  or bad
faith.  Until such demand by the Trustee,  the Company may pay the  principal of
and premium,  if any, and interest on the Debentures to the registered  holders,
whether or not the Debentures are overdue.

                  In case the Company  shall fail  forthwith to pay such amounts
upon such  demand,  the  Trustee,  in its own name and as  trustee of an express
trust,  shall be entitled and empowered to institute any actions or  proceedings
at law or in equity  for the  collection  of the sums so due and  unpaid and may
prosecute any such action or  proceeding  to judgment or final  decree,  and may
enforce  any such  judgment  or final  decree  against  the Company or any other
obligor on the Debentures  and collect in the manner  provided by law out of the
property of the Company or any other obligor on the Debentures wherever situated
the monies adjudged or decreed to be payable.

                  In case there shall be pending  proceedings for the bankruptcy
or for the  reorganization of the Company or any other obligor on the Debentures
under Title 11 of the United States Code or any other applicable law, or in case
a receiver,  assignee or trustee in  bankruptcy or  reorganization,  liquidator,
sequestrator  or  similar  official  shall  have  been  appointed  for or  taken

                                       23
<PAGE>

possession of the Company or such other obligor,  the property of the Company or
such other obligor, or in the case of any other judicial proceedings relative to
the Company or such other  obligor upon the  Debentures,  or to the creditors or
property of the Company or such other  obligor,  the  Trustee,  irrespective  of
whether the principal of the Debentures shall then be due and payable as therein
expressed or by declaration or otherwise and irrespective of whether the Trustee
shall have made any demand pursuant to the provisions of this Section 6.2, shall
be entitled and empowered,  by intervention in such proceedings or otherwise, to
file and prove a claim or claims for the whole amount of principal,  premium, if
any, and interest owing and unpaid in respect of the Debentures  and, in case of
any  judicial  proceedings,  to file such  proofs  of claim and other  papers or
documents  as may be  necessary  or advisable in order to have the claims of the
Trustee  and  of the  Debentureholders  allowed  in  such  judicial  proceedings
relative to the  Company or any other  obligor on the  Debentures,  its or their
creditors,  or its or their  property  and to collect  and receive any monies or
other  property  payable or deliverable on any such claims and to distribute the
same after the  deduction of any amounts due the Trustee  under Section 7.6; and
any receiver,  assignee or trustee in bankruptcy or reorganization,  liquidator,
custodian   or  similar   official   is  hereby   authorized   by  each  of  the
Debentureholders to make such payments to the Trustee and, in the event that the
Trustee  shall  consent  to  the  making  of  such  payments   directly  to  the
Debentureholders,  to  pay to  the  Trustee  any  amount  due it for  reasonable
compensation,  expenses,  advances  and  disbursements,  including  counsel fees
incurred  by it up to the date of such  distribution.  To the  extent  that such
payment of reasonable compensation,  expenses, advances and disbursements out of
the estate in any such  proceedings  shall be denied for any reason,  payment of
the same  shall be  secured  by a lien on, and shall be paid out of, any and all
distributions, dividends, monies, securities and other property that the holders
of the  Debentures  may be entitled to receive in such  proceedings,  whether in
liquidation or under any plan of reorganization or arrangement or otherwise.

                  Nothing  herein  contained  shall be deemed to  authorize  the
Trustee to authorize or consent to or adopt on behalf of any Debentureholder any
plan of reorganization or arrangement  affecting the Debentures or the rights of
any Debentureholder, or to authorize the Trustee to vote in respect of the claim
of any Debentureholder in any such proceeding.

                  All  rights of  action  and of  asserting  claims  under  this
Indenture,  or under  any of the  Debentures,  may be  enforced  by the  Trustee
without the possession of any of the Debentures or the production thereof on any
trial or other  proceeding  relative  thereto,  and any such suit or  proceeding
instituted  by the  Trustee  shall be  brought  in its own name as trustee of an
express  trust,  and any recovery of judgment  shall,  after  provision  for the
payment of the reasonable compensation,  expenses, disbursements and advances of
the Trustee,  its agents and counsel,  be for the ratable benefit of the holders
of the Debentures.

                  In any  proceedings  brought by the  Trustee  pursuant to this
Indenture  or any  supplement  hereto  (and  in any  proceedings  involving  the
interpretation  of any provision of this Indenture to which the Trustee shall be
a  party),  the  Trustee  shall  be held to  represent  all the  holders  of the
Debentures,  and it shall not be necessary to make any holders of the Debentures
parties to any such proceedings.

                                       24

<PAGE>

                  Section 6.3  Application of Monies  Collected by Trustee.  Any
monies  collected by the Trustee pursuant to this Article VI shall be applied in
the  order  following,  at the  date  or  dates  fixed  by the  Trustee  for the
distribution of such monies,  upon  presentation  of the several  Debentures and
stamping  thereon  the  payment,  if only  partially  paid,  and upon  surrender
thereof, if fully paid:

                  First:  To the payment of all  amounts  due the Trustee  under
         Section 7.6;

                  Second:  Subject to the  provisions of Article XV, in case the
         principal of the outstanding  Debentures  shall not have become due and
         be unpaid,  to the payment of interest on the  Debentures in default in
         the order of the maturity of the  installments  of such interest,  with
         interest (to the extent that such  interest  has been  collected by the
         Trustee) upon the overdue installments of interest at the rate borne by
         the  Debentures,  such  payments  to be  made  ratably  to the  persons
         entitled thereto; and

                  Third:  Subject to the  provisions  of Article XV, in case the
         principal  of the  outstanding  Debentures  shall have  become  due, by
         declaration  or otherwise,  and be unpaid,  to the payment of the whole
         amount  then  holding  and unpaid upon the  Debentures  for  principal,
         premium,  if any, and interest,  with interest on the overdue principal
         and  premium,  if any,  and (to the extent that such  interest has been
         collected by the Trustee) upon overdue  installments of interest at the
         rate  borne  by the  Debentures;  and in  case  such  monies  shall  be
         insufficient  to pay in full the whole  amounts so due and unpaid  upon
         the Debentures, then to the payment of such principal, premium, if any,
         and interest  without  preference or priority of principal and premium,
         if any, over interest,  or of interest over  principal and premium,  if
         any, or of any  installment  of interest over any other  installment of
         interest, or of any Debenture over any other Debenture,  ratably to the
         aggregate of such principal and premium, if any, and accrued and unpaid
         interest.

                  Section 6.4 Proceedings by  Debentureholder.  No holder of any
Debenture  shall have any right by virtue of or by availing of any  provision of
this  Indenture to institute any suit,  action or proceeding in equity or at law
upon or under or with respect to this  Indenture,  or for the  appointment  of a
receiver, trustee,  liquidator,  custodian or other similar official, or for any
other remedy  hereunder,  unless such holder  previously shall have given to the
Trustee written notice of an Event of Default and of the continuance thereof, as
hereinbefore  provided,  and  unless  also the  holders  of not less than 25% in
aggregate  principal amount of the Debentures then  outstanding  shall have made
written request upon the Trustee to institute such action, suit or proceeding in
its own name as Trustee  hereunder  and shall have  offered to the Trustee  such
reasonable  indemnity  as  it  may  require  against  the  costs,  expenses  and
liabilities to be incurred therein or thereby, and the Trustee for 60 days after
its receipt of such notice, request and offer of indemnity, shall have neglected
or refused to institute any such action,  suit or  proceeding,  and no direction
inconsistent  with such  written  request  shall have been given to the  Trustee
pursuant to Section 6.7; it being  understood and intended,  and being expressly
covenanted by the taker and holder of every Debenture with every other taker and
holder and the Trustee, that no one or more holders of Debentures shall have any

                                       25

<PAGE>

right in any manner  whatever by virtue of or by availing  of any  provision  of
this Indenture to affect, disturb or prejudice the rights of any other holder of
Debentures, to obtain or seek to obtain priority over or preference to any other
such holder or to enforce any right under this  Indenture,  except in the manner
herein provided and for the equal,  ratable and common benefit of all holders of
Debentures  (except  as  otherwise  provided  herein).  For the  protection  and
enforcement of this Section 6.4, each and every  Debentureholder and the Trustee
shall be entitled to such relief as can be given either at law or in equity.

                  Notwithstanding  any other provision of this Indenture and any
provision of any Debenture,  the right of any holder of any Debenture to receive
payment of the principal of, premium, if any, and interest on such Debenture, on
or after the respective due dates expressed in such  Debenture,  or to institute
suit for the enforcement of any such payment on or after such  respective  dates
against  the Company  shall not be  impaired or affected  without the consent of
such holder except as otherwise set forth herein.

                  Anything in this  Indenture or the  Debentures to the contrary
notwithstanding,  the holder of any Debenture, without the consent of either the
Trustee or the holder of any other Debenture,  in his own behalf and for his own
benefit,  may enforce, and may institute and maintain any proceeding suitable to
enforce, his rights of conversion as provided herein.

                  Section 6.5  Proceedings  by  Trustee.  In case of an Event of
Default and subject to the provisions of Section 7.6 hereof,  the Trustee may in
its  discretion  proceed to protect and enforce the rights  vested in it by this
Indenture by such  appropriate  judicial  proceedings  as the Trustee shall deem
most  effectual  to protect and enforce  any of such  rights,  either by suit in
equity or by action at law or by proceeding in bankruptcy or otherwise,  whether
for the specific  enforcement  of any  covenant or  agreement  contained in this
Indenture or in aid of the exercise of any power granted in this Indenture or to
enforce  any  other  legal or  equitable  right  vested in the  Trustee  by this
Indenture or by law.

                  Section 6.6  Remedies  Cumulative  and  Continuing.  Except as
provided in Section 2.6, all powers and remedies given by this Article VI to the
Trustee or to the  Debentureholders  shall,  to the extent  permitted by law, be
deemed  cumulative and not exclusive of such powers and remedies or of any other
powers and remedies  available to the Trustee or the holders of the  Debentures,
by judicial  proceedings or otherwise,  to enforce the performance or observance
of the covenants and  agreements  contained in this  Indenture,  and no delay or
omission  of the Trustee or of any holder of any of the  Debentures  to exercise
any right or power  accruing upon any default or Event of Default  occurring and
continuing  as  aforesaid  shall  impair  any  such  right  or power or shall be
construed to be a waiver of any such default or any acquiescence  therein;  and,
subject to the  provisions of Section 6.4,  every power and remedy given by this
Article VI or by law to the Trustee or to the  Debentureholders may be exercised
from time to time, and as often as shall be deemed expedient,  by the Trustee or
by the Debentureholders.

                                       26
<PAGE>

                  Section 6.7 Direction of Proceedings and Waiver of Defaults by
Majority of  Debentureholders.  The holders of a majority in aggregate principal
amount of the Debentures at the time outstanding  (determined in accordance with
Section  8.4)  shall  have the right to direct  the  time,  method  and place of
conducting any proceeding for any remedy  available to the Trustee or exercising
any trust or power  conferred on the Trustee;  provided that (a) such  direction
shall not be in conflict with any rule of law or with this Indenture and (b) the
Trustee  may take any other  action  deemed  proper by the  Trustee  that is not
inconsistent  with such  direction.  The  holders  of a  majority  in  aggregate
principal  amount  of the  Debentures  at the time  outstanding  (determined  in
accordance  with  Section  8.4)  may  on  behalf  of the  holders  of all of the
Debentures  waive  any  past  default  or  Event of  Default  hereunder  and its
consequences except (i) a default in the payment of interest or premium, if any,
on, or the  principal  of,  the  Debentures,  (ii) a failure  by the  Company to
convert any Debentures into Common Stock or cash, as the case may be, or (iii) a
default in  respect of a covenant  or  provisions  hereof  that under  Article X
cannot be  modified  or  amended  without  the  consent  of the  holders  of all
Debentures then outstanding.  Whenever any default or Event of Default hereunder
shall have been waived as permitted  by this Section 6.7,  said default or Event
of Default shall for all purposes of the Debentures and this Indenture be deemed
to have been cured and to be not continuing and the Company, the Trustee and the
holders of the  Debentures  shall as  reasonably  possible  be restored to their
former  positions and rights  hereunder;  but no such waiver shall extend to any
subsequent or other  default or Event of Default or impair any right  consequent
thereon.

                  Section 6.8 Notice of Defaults.  The Trustee shall,  within 90
days after the  occurrence of a default,  mail to all  Debentureholders,  as the
names and addresses of such holders appear upon the Debenture  register,  notice
of all defaults of which a Responsible Officer has actual knowledge, unless such
defaults  shall  have been cured or waived  before  the  giving of such  notice;
provided that, except in the case of default in the payment of the principal of,
premium,  if any,  or interest on any of the  Debentures,  the Trustee  shall be
protected in withholding such notice if and so long as a Responsible  Officer of
the Trustee in good faith  determine  that the  withholding of such notice is in
the interests of the Debentureholders.

                  Section  6.9  Undertaking  to Pay Costs.  All  parties to this
Indenture  agree,  and each holder of any  Debenture by his  acceptance  thereof
shall be deemed to have agreed, that any court may, in its discretion,  require,
in any suit for the enforcement of any right or remedy under this Indenture,  or
in any suit  against  the  Trustee  for any  action  taken or  omitted  by it as
Trustee,  the filing by any party litigant in such suit of an undertaking to pay
the  costs  of such  suit and  that  such  court  may in its  discretion  assess
reasonable costs, including reasonable attorneys' fees and expenses, against any
party  litigant in such suit,  having due regard to the merits and good faith of
the claims or defenses made by such party litigant; provided that the provisions
of this Section 6.9 shall not apply to any suit  instituted  by the Trustee,  to
any suit instituted by any Debentureholder or group of Debentureholders  holding
in the aggregate more than 10% in principal amount of the Debentures at the time
outstanding  determined in accordance with Section 8.4 or to any suit instituted
by any  Debentureholder  for the enforcement of the payment of the principal of,

                                       27

<PAGE>

premium, if any, or interest on any Debenture on or after the due date expressed
in such Debenture or to any suit for the enforcement of the right to convert any
Debenture in accordance with the provisions of Article XIV.


                                   ARTICLE VII

                             CONCERNING THE TRUSTEE


                  Section 7.1       Duties and Responsibilities of Trustee.

                  (a) If an Event of Default has occurred and is continuing, the
Trustee shall  exercise the rights and powers vested in it by this Indenture and
use the same degree of care and skill in its exercise as a prudent  person would
exercise  or use under the  circumstances  in the conduct of such  person's  own
affairs.

                  (b) Except during the continuance of an Event of Default:

                           (i)      the Trustee need  perform only  those duties
                  that are  specifically  set forth  in this  Indenture  and  no
                  others; and

                           (ii) in the  absence  of bad faith on its  part,  the
                  Trustee  may  conclusively  rely,  as  to  the  truth  of  the
                  statements  and  the  correctness  of the  opinions  expressed
                  therein,  upon  certificates  or  opinions  furnished  to  the
                  Trustee and conforming to the  requirements of this Indenture;
                  provided that in the case of any such certificates or opinions
                  that by any provision hereof are  specifically  required to be
                  furnished to the Trustee, the Trustee shall be under a duty to
                  examine the same to  determine  whether or not they conform to
                  the  requirements  of this  Indenture (but need not confirm or
                  investigate the accuracy of mathematical calculations or other
                  facts stated therein).

                  (c) The Trustee may not be relieved from liability for its own
negligent  action,  its  own  negligent  failure  to  act  or  its  own  willful
misconduct, except that:

                           (i)  this paragraph (c) does  not limit the effect of
                  paragraph (b) of this Section 7.1;

                           (ii) the Trustee shall not be liable for any error of
                  judgment  made in good faith by a  Responsible  Officer of the
                  Trustee  unless it is proved that the Trustee was negligent in
                  ascertaining the pertinent facts  reasonably  available to the
                  Trustee; and

                                       28

<PAGE>

                           (iii) the Trustee shall not be liable with respect to
                  any  action  it  takes  or  omits  to take in  good  faith  in
                  accordance with a direction received by it pursuant to Section
                  6.7.

                  (d) Every  provision of this Indenture that in any way relates
to the Trustee is subject to  paragraphs  (a),  (b), (c) and (e) of this Section
7.1.

                  (e) The Trustee may refuse to perform any duty or exercise any
right or power or extend or risk its own funds or otherwise  incur any financial
liability  unless it  receives  indemnity  satisfactory  to it against any loss,
liability or expense.

                  Section 7.2 Reliance on Documents,  Opinions,  Etc.  Except as
otherwise provided in Section 7.1:

                  (a) The Trustee may rely and shall be protected in acting upon
         any resolution,  certificate,  statement,  instrument, opinion, report,
         notice, request, consent, order, bond, debenture, coupon or other paper
         or document believed by it in good faith to be genuine and to have been
         signed or presented by the proper party or parties;

                  (b) Any  request,  direction,  order or demand of the  Company
         mentioned  herein  shall  be  sufficiently  evidenced  by an  Officers'
         Certificate;  and any  resolution  of the  Board  of  Directors  may be
         evidenced to the Trustee by a copy thereof  certified by the  Secretary
         or an Assistant Secretary of the Company;

                  (c) The Trustee may consult with counsel of its  selection and
         any  advice  or  opinion  of  counsel   shall  be  full  and   complete
         authorization  and protection in respect of any action taken or omitted
         by it  hereunder  in good faith and in  accordance  with such advice or
         opinion of counsel;

                  (d) The  Trustee  may  execute  any of the  trusts  or  powers
         hereunder  or perform  any duties  hereunder  either  directly or by or
         through  agents or attorneys,  and the Trustee shall not be responsible
         for any  misconduct  or negligence on the part of any agent or attorney
         appointed by it with due care hereunder; no paying agent who is not the
         Trustee  shall be deemed an agent of the  Trustee,  and the Trustee (in
         its  capacity  as  Trustee)  shall  not be  responsible  for any act or
         omission by any such paying agent;

                  (e) The Trustee  shall be under no  obligation to exercise any
         of the rights or powers vested in it by the Indenture at the request or
         direction of any of the holders  pursuant to this Indenture unless such
         holders  have  offered the  Trustee  reasonable  security or  indemnity
         against the costs,  expenses and liabilities  that would be incurred by
         it in compliance with such request or direction.

                                       29

<PAGE>

                  (f) Subject to the provisions of Section  7.1(c),  the Trustee
         shall  not be liable  for any  action it takes or omits to take in good
         faith that it believes to be authorized or within its rights or powers;

                  (g) In connection with any request to transfer or exchange any
         Debenture,  the  Trustee  may  request a  direction  (in the form of an
         Officers'  Certificate) from the Company and an Opinion of Counsel with
         respect to  compliance  with any  restrictions  on transfer or exchange
         imposed by this Indenture,  the Securities Act, other applicable law or
         the rules and  regulations  of any exchange on which the  Debentures or
         the capital stock may be traded,  and the Trustee may rely and shall be
         protected in acting upon such  direction  and in  accordance  with such
         Officers' Certificate and Opinion of Counsel;

                  (h) The  Trustee  may rely and  shall  be fully  protected  in
         acting  upon  the  determination  and  notice  by  the  Company  of the
         Conversion Price; and

                  (i) The Trustee  shall not be deemed to have  knowledge of any
         Event of Default or other fact or event upon the occurrence of which it
         may be required to take action  hereunder unless one of its Responsible
         Officers has actual knowledge thereof obtained by a written statement.

                  Section 7.3 No Responsibility for Recitals,  Etc. The recitals
contained herein and in the Debentures  (except in the Trustee's  certificate of
authentication) shall be taken as the statements of the Company, and the Trustee
assumes no responsibility  for the correctness of the same. The Trustee makes no
representations  as to the validity or  sufficiency  of this Indenture or of the
Debentures.  The Trustee shall not be accountable  for the use or application by
the Company of any  Debentures or the proceeds of any  Debentures  authenticated
and  delivered  by the  Trustee  in  conformity  with  the  provisions  of  this
Indenture.

                  Section  7.4  Trustee,  Paying  Agents,  Conversion  Agents or
Registrar May Own  Debentures.  The Trustee,  any paying agent,  any  conversion
agent or any Debenture registrar,  in its individual or any other capacity,  may
become the owner or pledgee of Debentures  with the same rights it would have if
it were not Trustee, paying agent, conversion agent or Debenture registrar.

                  Section  7.5  Monies  to Be  Held  in  Trust.  Subject  to the
provisions of Section 12.4,  all monies  received by the Trustee or Paying Agent
shall,  until  used or  applied  as  herein  provided,  be held in trust for the
purposes for which they were received. Money held by the Trustee or Paying Agent
in trust  hereunder need not be segregated from other funds except to the extent
required by law.  The Trustee or Paying  Agent shall be under no  liability  for
interest  on any money  received by it  hereunder  except as may be agreed to in
writing from time to time by the Company and the Trustee or Paying Agent.

                  Section 7.6 Compensation and Expenses of Trustee.  The Company
covenants  and agrees to pay to the Trustee  from time to time,  and the Trustee
shall be entitled to, such compensation  as the Company  and the  Trustee  shall

                                       30

<PAGE>

from time to time agree in writing, for all services rendered by it hereunder in
any capacity  (which  shall not be limited by any  provision of law in regard to
the compensation of a trustee of an express trust), and the Company shall pay or
reimburse   the  Trustee   upon  its  request  for  all   reasonable   expenses,
disbursements  and advances  incurred or made by the Trustee in accordance  with
any of the provisions of this Indenture  (including the reasonable  compensation
and the  expenses  and  disbursements  of its  counsel  and of all  persons  not
regularly in its employ) except any such expense, disbursement or advance as may
arise from its negligence or bad faith.  The Company also covenants to indemnify
each of the  Trustee  or any  predecessor  Trustee  in any  capacity  under this
Indenture  and its agents  and any  authenticating  agent for,  and to hold them
harmless  against,  any and all  loss,  liability,  damage,  claim  or  expense,
including  taxes (other than taxes based on the income of the Trustee)  incurred
without  negligence  or bad faith on the part of the  Trustee  or such  agent or
authenticating  agent,  as the case may be, and arising out of or in  connection
with the  acceptance or  administration  of this trust or in any other  capacity
hereunder,  including the costs and expenses of defending themselves against any
claim of liability in the premises.  The  obligations  of the Company under this
Section 7.6 to  compensate  or indemnify the Trustee and to pay or reimburse the
Trustee for  expenses,  disbursements  and  advances  shall be secured by a lien
prior to that of the Debentures upon all property and funds held or collected by
the Trustee as such,  except  funds held in trust for the benefit of the holders
of particular Debentures. The obligation of the Company under this Section shall
survive the satisfaction and discharge of this Indenture.

                  Section  7.7  Officers'  Certificate  as  Evidence.  Except as
otherwise  provided  in  Section  7.1,  whenever  in the  administration  of the
provisions  of this  Indenture  the Trustee shall deem it necessary or desirable
that a matter be proved or  established  prior to taking or omitting  any action
hereunder,  such matter  (unless  other  evidence  in respect  thereof be herein
specifically  prescribed)  may, in the absence of negligence or bad faith on the
part of the Trustee,  be deemed to be conclusively  proved and established by an
Officers' Certificate delivered to the Trustee, and such Officers'  Certificate,
in the absence of negligence  or bad faith on the part of the Trustee,  shall be
full  warrant to the  Trustee  for any  action  taken or omitted by it under the
provisions of this Indenture upon the faith thereof.

                  Section 7.8       Resignation or Removal of Trustee.

                   (a) The  Trustee  may at any time  resign by  giving  written
notice of such resignation to the Company;  and the Company shall mail, or cause
to be mailed,  notice thereof to the holders of Debentures at their addresses as
they shall  appear on the  Debenture  register.  Upon  receiving  such notice of
resignation,  the Company shall promptly appoint a successor  trustee by written
instrument, in duplicate,  executed by order of the Board of Directors, one copy
of which instrument shall be delivered to the resigning  Trustee and one copy to
the successor trustee.

                  (b) In case the Trustee shall become  incapable of acting,  or
shall be  adjudged a bankrupt or  insolvent,  or a receiver of the Trustee or of
its property  shall be  appointed,  or any public  officer  shall take charge or
control  of the  Trustee  or of its  property  or  affairs  for the  purpose  of

                                       31
<PAGE>

rehabilitation, conservation or liquidation, then, in any such case, the Company
may remove the Trustee and appoint a successor trustee by written instrument, in
duplicate,  executed  by order  of the  Board  of  Directors,  one copy of which
instrument  shall be  delivered  to the  Trustee so removed  and one copy to the
successor trustee,  or any  Debentureholder who has been a bona fide holder of a
Debenture  or  Debentures  for at least six months may, on behalf of himself and
all others similarly situated,  petition any court of competent jurisdiction for
the removal of the  Trustee and the  appointment  of a successor  trustee.  Such
court may  thereupon,  after  such  notice,  if any,  as it may deem  proper and
prescribe, remove the Trustee and appoint a successor trustee.

                  (c) The holders of a majority in aggregate principal amount of
the  Debentures at the time  outstanding  may at any time remove the Trustee and
nominate a successor  trustee,  which  shall be deemed  appointed  as  successor
trustee  unless  within ten days after notice to the Company of such  nomination
the  Company  objects  thereto,  in which  case the  Trustee  so  removed or any
Debentureholder,  upon the terms and conditions and otherwise as provided in the
next  paragraph,  may  petition  any  court  of  competent  jurisdiction  for an
appointment of a successor trustee.

                  If no successor  trustee shall have been so appointed and have
accepted  appointment within 60 days after removal or the mailing of such notice
of resignation to the  Debentureholders,  the Trustee resigning or being removed
may  petition  any court of  competent  jurisdiction  for the  appointment  of a
successor  trustee,  or,  in the case of  either  resignation  or  removal,  any
Debentureholder who has been a bona fide holder of a Debenture or Debentures for
at least six months may, on behalf of himself and all others similarly situated,
petition any such court for the appointment of a successor  trustee.  Such court
may thereupon,  after such notice,  if any, as it may deem proper and prescribe,
appoint a successor trustee.

                  (d) Any  resignation or removal of the Trustee and appointment
of a successor  trustee  pursuant to any of the  provisions  of this Section 7.8
shall become  effective upon acceptance of appointment by the successor  trustee
as provided in Section 7.9.

                  Section 7.9  Acceptance  by Successor  Trustee.  Any successor
trustee  appointed  as provided in Section 7.8 shall  execute,  acknowledge  and
deliver to the Company and to its  predecessor  trustee an instrument  accepting
such  appointment  hereunder,  and thereupon,  the resignation or removal of the
predecessor  trustee shall become effective and such successor trustee,  without
any further act,  deed or  conveyance,  shall become vested with all the rights,
powers, duties and obligations of its predecessor hereunder, with like effect as
if originally named as trustee herein; but on the written request of the Company
or of the successor  trustee,  the Trustee ceasing to act shall, upon payment of
any amounts then due it pursuant to the  provisions of Section 7.6,  execute and
deliver an instrument  transferring to such successor trustee all the rights and
powers of the  Trustee  so ceasing to act.  Upon  request of any such  successor
trustee,  the Company shall execute any and all  instruments in writing for more
fully and certainly vesting in and confirming to such successor trustee all such
rights and powers. Any Trustee ceasing to act shall, nevertheless, retain a lien

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<PAGE>

upon all property  and funds held or  collected by such trustee as such,  except
for funds held in trust for the benefit of holders of particular Debentures,  to
secure any amounts then due it pursuant to the provisions of Section 7.6.

                  Upon  acceptance  of  appointment  by a  successor  trustee as
provided  in this  Section  7.9,  the  Company  shall mail or cause to be mailed
notice of the succession of such Trustee  hereunder to the holders of Debentures
at their  addresses  as they  shall  appear on the  Debenture  register.  If the
Company  fails  to  mail  such  notice  within  ten  days  after  acceptance  of
appointment  by the successor  trustee,  the successor  trustee shall cause such
notice to be mailed at the expense of the Company.

                  Section 7.10 Successor  by Merger,  Etc. Any  corporation into
which  the  Trustee  may  be  merged  or  converted  or  with  which  it  may be
consolidated,  or any  corporation  resulting  from any  merger,  conversion  or
consolidation  to  which  the  Trustee  shall  be a  party,  or any  corporation
succeeding to all or  substantially  all of the corporate  trust business of the
Trustee, shall be the successor to the Trustee hereunder.

                                  ARTICLE VIII

                         CONCERNING THE DEBENTUREHOLDERS


                  Section  8.1  Action  by  Debentureholders.  Whenever  in this
Indenture it is provided that the holders of a specified percentage in aggregate
principal amount of the Debentures may take any action  (including the making of
any demand or request, the giving of any notice, consent or waiver or the taking
of any other action),  the fact that at the time of taking any such action,  the
holders of such specified percentage have joined therein may be evidenced (a) by
any  instrument  or any number of  instruments  of  similar  tenor  executed  by
Debentureholders in person or by agent or proxy appointed in writing, (b) by the
record of the holders of  Debentures  voting in favor  thereof at any meeting of
Debentureholders  duly  called and held in  accordance  with the  provisions  of
Article IX or (c) by a combination  of such  instrument or  instruments  and any
such record of such a meeting of  Debentureholders.  Whenever the Company or the
Trustee solicits the taking of any action by the holders of the Debentures,  the
Company or the  Trustee may fix in advance of such  solicitation,  a date as the
record date for  determining  holders  entitled to take such action.  The record
date  shall  be not more  than 15 days  prior  to the  date of  commencement  of
solicitation of such action.

                  Section 8.2 Proof of Execution by Debentureholders. Subject to
the  provisions  of Sections  7.1,  7.2 and 9.5,  proof of the  execution of any
instrument by a Debentureholder or by agent or proxy shall be sufficient if made
in accordance with Section 7.3 hereof. The holding of Debentures shall be proved
by the Debenture register or by a certificate of the Debenture registrar.

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<PAGE>

                  The record of any Debentureholders' meeting shall be proved in
the manner provided in Section 9.5.

                  Section 8.3 Who Are Deemed Absolute Owners.  The Company,  the
Trustee,  any paying agent, any conversion agent and any Debenture registrar may
deem the person in whose name such Debenture  shall be registered upon the books
of the Company to be, and may treat such person as, the  absolute  owner of such
Debenture  (whether or not such Debenture  shall be overdue and  notwithstanding
any notation of ownership or other writing thereon) for the purpose of receiving
payment of or on account of the principal of,  premium,  if any, and interest on
such Debenture, for conversion of such Debenture and for all other purposes; and
neither the Company  nor the  Trustee  nor any paying  agent nor any  conversion
agent  nor any  Debenture  registrar  shall be  affected  by any  notice  to the
contrary.  All such  payments so made to any holder for the time being,  or upon
order of such  holder,  shall be valid and,  to the extent of the sum or sums so
paid,  effectual to satisfy and discharge the liability for monies  payable upon
any such Debenture.

                  Section   8.4   Company-Owned   Debentures   Disregarded.   In
determining  whether the holders of the requisite  aggregate principal amount of
Debentures  have  concurred in any  direction,  consent,  waiver or other action
under  this  Indenture,  Debentures  that are owned by the  Company or any other
obligor on the Debentures or by any person directly or indirectly controlling or
controlled by or under direct or indirect common control with the Company or any
other  obligor  on the  Debentures  shall be  disregarded  and  deemed not to be
outstanding  for the purpose of any such  determination;  provided  that for the
purposes of determining whether the Trustee shall be protected in relying on any
such  direction,  consent,  waiver  or  other  action,  only  Debentures  that a
Responsible  Officer  of the  Trustee  actually  knows are so owned  shall be so
disregarded.  Debentures  so owned  that have been  pledged in good faith may be
regarded as  outstanding  for the  purposes  of this  Section 8.4 if the pledgee
shall  establish to the  satisfaction of the Trustee the pledger's right to vote
such  Debentures  and that the pledgee is not the Company,  any other obligor on
the Debentures or a person  directly or indirectly  controlling or controlled by
or under  direct or indirect  common  control with the Company or any such other
obligor.  In the case of a dispute as to such right, any decision by the Trustee
taken upon the advice of counsel shall be full  protection to the Trustee.  Upon
request of the Trustee,  the Company  shall  furnish to the Trustee  promptly an
Officers'  Certificate listing and identifying all Debentures,  if any, known by
the  Company  to be  owned  or held by or for the  account  of any of the  above
described persons;  and subject to Section 7.1, the Trustee shall be entitled to
accept such Officers'  Certificate  as conclusive  evidence of the facts therein
set forth and of the fact that all Debentures not listed therein are outstanding
for the purpose of any such determination.

                  Section 8.5 Revocation of Consents,  Future Holders Bound.  At
any time prior to (but not after) the evidencing to the Trustee,  as provided in
Section  8.1,  of the taking of any action by the holders of the  percentage  in
aggregate  principal  amount of the  Debentures  specified in this  Indenture in
connection  with such  action,  any holder of a  Debenture  that is shown by the
evidence to be included in the Debentures the holders of which have consented to
such  action  may, by filing  written  notice with the Trustee at its  Corporate

                                       34

<PAGE>

Trust Office and upon proof of holding as provided in Section  8.2,  revoke such
action so far as concerns such Debenture.  Except as aforesaid,  any such action
taken by the holder of any Debenture  shall be conclusive  and binding upon such
holder  and upon all future  holders  and  owners of such  Debenture  and of any
Debentures issued in exchange or substitution therefor,  irrespective of whether
any  notation in regard  thereto is made upon such  Debenture  or any  Debenture
issued in exchange or substitution therefor.


                                   ARTICLE IX

                           DEBENTUREHOLDERS' MEETINGS


                  Section  9.1  Purposes  for Which  Meetings  May be Called.  A
meeting  of  Debentureholders  may be  called  at any time and from time to time
pursuant to the provisions of this Article IX for any of the following purposes:

                  (i) to give any notice to the Company or to the Trustee, or to
         give any directions to the Trustee, or to consent to the waiving of any
         default  hereunder  and its  consequences,  or to take any other action
         authorized  to be  taken  by  Debentureholders  pursuant  to any of the
         provisions of Article VI;

                  (ii) to remove the Trustee  and  appoint a  successor  trustee
         pursuant to the provisions of Article VII;

                  (iii)  to  consent  to  the   execution  of  an  indenture  or
         indentures  supplemental  hereto  pursuant to the provisions of Section
         10.2; or

                  (iv) to take any other action  authorized to be taken by or on
         behalf of the holders of any specified  aggregate  principal  amount of
         the  Debentures  under any other  provisions of this Indenture or under
         applicable law.

                  Section  9.2  Manner of Calling  Meetings;  Record  Date.  The
Trustee  may at any time call a meeting of  Debentureholders  to take any action
specified  in  Section  9.1,  to be held at such  time and at such  place as the
Trustee  shall  determine.  Notice  of every  meeting  of the  Debentureholders,
setting  forth the time and the place of such  meeting and in general  terms the
action  proposed to be taken at such  meeting,  shall be mailed not less than 30
nor  more  than 60  days  prior  to the  date  fixed  for  the  meeting  to such
Debentureholders  at their  addresses as such addresses  appear in the Debenture
register. For the purpose of determining  Debentureholders entitled to notice of
any  meeting  of  Debentureholders,  the  Company,  upon  written  notice to the
Trustee,  shall fix in advance a date as the record date for such determination,
such date to be a  business  day not more than ten days prior to the date of the
mailing of such notice as hereinabove  provided.  Only persons in whose name any
Debenture shall be registered in the Debenture register at the close of business

                                       35
<PAGE>

on a record  date fixed by the  Trustee as  aforesaid,  or by the Company or the
Debentureholders  as provided in Section 9.3, shall be entitled to notice of the
meeting of Debentureholders with respect to which such record date was so fixed.

                  Section 9.3 Call of Meeting by Company or Debentureholders. In
case at any time the Company, pursuant to a resolution of its Board of Directors
or the holders of at least 10% in aggregate  principal  amount of the Debentures
then  outstanding  shall  have  requested  the  Trustee  to  call a  meeting  of
Debentureholders to take any action authorized in Section 9.1 by written request
setting  forth in  reasonable  detail  the  action  proposed  to be taken at the
meeting,  and the Trustee shall not have mailed notice of such meeting within 20
days  after  receipt  of such  request,  then  the  Company  or the  holders  of
Debentures in the amount above specified, as the case may be, may fix the record
date with respect to, and determine the time and the place for, such meeting and
may call such meeting to take any action  authorized  in Section 9.1, by mailing
notice  thereof as provided in Section 9.2. The record date fixed as provided in
the preceding sentence shall be set forth in a written notice to the Trustee and
shall be a business day not less than 15 nor more than 20 days after the date on
which the original request is sent to the Trustee.

                  Section 9.4 Who May Attend and Vote at Meetings.  Only persons
entitled to receive notice of a meeting of Debentureholders and their respective
proxies duly  appointed by an instrument in writing shall be entitled to vote at
such  meeting.  The only persons who shall be entitled to be present or to speak
at any meeting of Debentureholders shall be the persons entitled to vote at such
meeting and their counsel and any representatives of the Trustee and its counsel
and any representatives of the Company and its counsel.  When a determination of
Debentureholders  entitled to vote at any meeting of  Debentureholders  has been
made  as  provided  in this  Section,  such  determination  shall  apply  to any
adjournments thereof.

                  Section  9.5  Manner of Voting at  Meetings  and  Record to be
Kept. The vote upon any resolution  submitted to any meeting of Debentureholders
shall be by written  ballots on each of which shall be subscribed  the signature
of the  Debentureholder  or proxy casting such ballot and the identifying number
or numbers of the Debentures held or represented in respect of which such ballot
is cast.  The chairman of the meeting shall appoint two  inspectors of votes who
shall count all votes cast at the meeting for or against any  resolution and who
shall make and file with the  secretary of the meeting  their  verified  written
reports in duplicate of all votes cast at the meeting.  A record in duplicate of
the  proceedings  of each meeting of  Debentureholders  shall be prepared by the
secretary of the meeting and there shall be attached to said record the original
reports  of the  inspectors  of votes on any vote by ballot  taken  thereat  and
affidavits by one or more persons having  knowledge of the facts setting forth a
copy of the notice of the  meeting  and  showing  that said notice was mailed as
provided in Section 9.2. The record  shall show the  identifying  numbers of the
Debentures  voting in favor of or against any  resolution.  Each  counterpart of
such record shall be signed and verified by the  affidavits  of the chairman and
secretary of the meeting and one of the  counterparts  shall be delivered to the
Company and the other to the Trustee to be preserved by the Trustee.

                  Any  counterpart  record  so  signed  and  verified  shall  be
conclusive  evidence  of the  matters  therein  stated  and shall be the  record
referred to in clause (b) of Section 8.1.

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<PAGE>

                  Section 9.6 Exercise of Rights of Trustee and Debentureholders
Not To Be Hindered or Delayed.  Nothing in this  Article IX  contained  shall be
deemed or construed  to authorize or permit,  by reason of any call of a meeting
of  Debentureholders or any rights expressly or impliedly conferred hereunder to
make such call,  any  hinderance or delay in the exercise of any right or rights
conferred upon or reserved to the Trustee or to the  Debentureholders  under any
of the provisions of this Indenture or of the Debentures.


                                    ARTICLE X

                             SUPPLEMENTAL INDENTURES


                  Section  10.1  Supplemental   Indentures  Without  Consent  of
Debentureholders.  The Company,  when authorized by a Board Resolution,  and the
Trustee  may from  time to time  and at any  time  enter  into an  indenture  or
indentures supplemental hereto for one or more of the following purposes:

                  (a)      to make  provision  with  respect to  the  conversion
         rights of the holders of  Debentures  pursuant to  the  requirements of
         Section 14.6;

                  (b)  subject  to  Article  XV, to  convey,  transfer,  assign,
         mortgage or pledge to the Trustee as security for the  Debentures,  any
         property or assets;

                  (c) to  evidence  the  succession  of  another  person  to the
         Company, or successive successions, and the assumption by the Successor
         Company of the  covenants,  agreements  and  obligations of the Company
         pursuant to Article XI;

                  (d) to  add to the  covenants  of  the  Company  such  further
         covenants, restrictions or conditions as the Board of Directors and the
         Trustee  shall  consider  to be  for  the  benefit  of the  holders  of
         Debentures  and  to  make  the   occurrence,   or  the  occurrence  and
         continuance,   of  a  default   in  any  such   additional   covenants,
         restrictions or conditions a default or an Event of Default  permitting
         the enforcement of all or any of the several remedies  provided in this
         Indenture  as herein  set forth;  provided  that in respect of any such
         additional  covenant,   restriction  or  condition,  such  supplemental
         indenture  may provide for a particular  period of grace after  default
         (which period may be shorter or longer than that allowed in the case of
         other defaults) or may provide for an immediate  enforcement  upon such
         default or may limit the  remedies  available  to the Trustee upon such
         default;

                  (e) to  provide  for the  issuance  under  this  Indenture  of
         Debentures  in coupon  form  (including  Debentures  registrable  as to
         principal only) and to provide for  exchangeability  of such Debentures
         with the Debentures  issued  hereunder in fully  registered form and to
         make all appropriate changes for such purpose;

                                       37

<PAGE>

                  (f) to cure any  ambiguity  or to  correct or  supplement  any
         provision contained herein or in any supplemental indenture that may be
         defective or inconsistent with any other provision  contained herein or
         in any  supplemental  indenture,  or to make such other  provisions  in
         regard to matters or questions  arising under this Indenture that shall
         not adversely affect the interests of the holders of the Debentures; or

                  (g) to evidence and provide for the  acceptance of appointment
         hereunder by a successor Trustee with respect to the Debentures.

                  The Trustee is hereby  authorized  to join with the Company in
the  execution  of  any  such  supplemental   indenture,  to  make  any  further
appropriate  agreements and  stipulations  that may be therein  contained and to
accept the conveyance,  transfer and assignment of any property thereunder,  but
the Trustee shall not be obligated to, but may in its discretion, enter into any
supplemental  indenture  that  affects  the  Trustee's  own  rights,  duties  or
immunities under this Indenture or otherwise.

                  Any  supplemental  indenture  authorized by the  provisions of
this  Section  10.1 may be executed  by the Company and the Trustee  without the
consent  of  the  holders  of any of the  Debentures  at the  time  outstanding,
notwithstanding any of the provisions of Section 10.2.

                  Section   10.2   Supplemental   Indentures   With  Consent  of
Debentureholders.  With the consent  (evidenced  as provided in Article VIII) of
the holders of not less than a majority  in  aggregate  principal  amount of the
Debentures  at the time  outstanding,  the Company,  when  authorized by a Board
Resolution and the Trustee,  may from time to time and at any time enter into an
indenture  or  indentures  supplemental  hereto  for the  purpose  of adding any
provisions to or changing in any manner or eliminating  any of the provisions of
this Indenture or any  supplemental  indenture or of modifying in any manner the
rights of the  holders of the  Debentures;  provided  that no such  supplemental
indenture  shall (i) without the  consent of the  holders of each  Debenture  so
affected,  extend the fixed  maturity  of any  Debenture,  or reduce the rate or
extend the time of payment of interest  thereon,  or reduce the principal amount
thereof or premium,  if any,  thereon or reduce any amount payable on redemption
or repurchase  thereof,  or impair or affect the right of any Debentureholder to
institute suit for the payment thereof or make the principal thereof or interest
or premium,  if any,  thereon  payable in any coin or  currency  other than that
provided in the  Debentures,  modify the  subordination  provisions  in a manner
adverse to the  holders of the  Debentures,  or impair the right to convert  the
Debentures  into Common  Stock or cash  subject to the terms set forth herein or
(ii) without the consent of the holders of all the Debentures then  outstanding,
reduce the aforesaid percentage of Debentures, the holders of which are required
to consent to any such supplemental indenture.

                  Upon the request of the  Company,  accompanied  by a copy of a
Board Resolution  certified by its Secretary or Assistant Secretary  authorizing
the execution of any such supplemental  indenture,  and upon the filing with the
Trustee of evidence of the consent of Debentureholders as aforesaid, the Trustee
shall join with the  Company in the  execution  of such  supplemental  indenture
unless such supplemental  indenture affects the Trustee's own rights,  duties or

                                       38

<PAGE>

immunities  under this Indenture or otherwise,  in which case the Trustee may in
its  discretion,  but shall not be obligated  to,  enter into such  supplemental
indenture.

                  It  shall   not  be   necessary   for  the   consent   of  the
Debentureholders  under this Section 10.2 to approve the particular  form of any
proposed  supplemental  indenture,  but it shall be  sufficient  if such consent
shall approve the substance thereof.

                  Section  10.3  Effect  of  Supplemental  Indentures.  Upon the
execution  of any  supplemental  indenture  pursuant to the  provisions  of this
Article X, this  Indenture  shall be and be deemed to be modified and amended in
accordance   therewith  and  the  respective   rights,   limitation  of  rights,
obligations,  duties and  immunities  under this  Indenture of the Trustee,  the
Company and the holders of Debentures shall thereafter be determined,  exercised
and  enforced  hereunder  subject  in all  respects  to such  modifications  and
amendments and all the terms and conditions of any such  supplemental  indenture
shall be and be deemed to be part of the terms and  conditions of this Indenture
for any and all purposes.

                  Section 10.4 Notation on Debentures.  Debentures authenticated
and delivered after the execution of any supplemental  indenture pursuant to the
provisions of this Article X may bear a notation in form approved by the Company
as to any matter provided for in such supplemental indenture,  but they need not
do so. After notice to the Trustee, if the Company shall determine to add such a
notation,  new Debentures so modified as to conform, in the opinion of the Board
of  Directors,  to any  modification  of this  Indenture  contained  in any such
supplemental  indenture may, at the Company's expense,  be prepared and executed
by the Company,  authenticated by the Trustee (or an  authenticating  agent duly
appointed by the Trustee  pursuant to Section  16.14) and  delivered in exchange
for the Debentures  then  outstanding,  upon surrender of such  Debentures  then
outstanding.

                  Section 10.5 Evidence of Compliance of Supplemental  Indenture
to Be Furnished to the Trustee. The Trustee shall be furnished with and, subject
to the  provisions  of  Sections  7.1 and  7.2,  may rely  conclusively  upon an
Officers'  Certificate and an Opinion of Counsel as conclusive evidence that any
supplemental  indenture  executed pursuant hereto complies with the requirements
of this Article X.


                                   ARTICLE XI

                    CONSOLIDATION, MERGER, SALE, CONVEYANCE,
                               TRANSFER AND LEASE


                  Section 11.1 Company May  Consolidate,  Etc. on Certain Terms.
The  Company  shall  not  consolidate  with or merge  with or into,  or  convey,
transfer  or lease  all or  substantially  all of its  assets  (determined  on a
consolidated  basis)  to any  person  unless:  (i)  either  the  Company  is the
resulting,  surviving  or  transferee  person (the  "Successor  Company") or the

                                       39

<PAGE>

Successor  Company  is a person  organized  and  existing  under the laws of the
United  States  or any  State  thereof  or the  District  of  Columbia,  and the
Successor  Company  (if not the  Company)  expressly  assumes by a  supplemental
indenture,  executed and delivered to the Trustee,  in form  satisfactory to the
Trustee,  all the  obligations  of the  Company  under  this  Indenture  and the
Debentures,   including  the  rights  pursuant  to  Article  XIV  hereof,   (ii)
immediately  after giving  effect to such  transaction,  no Event of Default has
happened  and is  continuing  and (iii) the  Company  delivers to the Trustee an
Officers'  Certificate  and an  Opinion  of  Counsel,  each  stating  that  such
consolidation,  merger or  transfer  and such  supplemental  indenture  (if any)
comply with this Indenture.

                  Section 11.2 Successor  Company To Be Substituted.  In case of
any such consolidation, merger, sale, conveyance, transfer or lease and upon the
assumption by the Successor  Company,  by supplemental  indenture,  executed and
delivered to the Trustee and satisfactory in form to the Trustee, of the due and
punctual  payment of the principal of,  premium,  if any, and interest on all of
the Debentures and the due and punctual  performance of all of the covenants and
conditions  of this  Indenture to be performed  by the Company,  such  Successor
Company  shall  succeed to and be  substituted  for the  Company,  with the same
effect as if it had been  named  herein as the party  hereto.  When a  Successor
Company  duly  assumes  all the  obligations  of the  Company  pursuant  to this
Indenture and the Debentures,  the  predecessor  shall be released from all such
obligations.

                  Section  11.3  Opinion of Counsel To Be Given to Trustee.  The
Trustee, subject to Sections 7.1 and 7.2, shall receive an Officers' Certificate
and an Opinion of Counsel as conclusive  evidence  that any such  consolidation,
merger,  sale,  conveyance,  transfer or lease and any such assumption  complies
with the provisions of this Article XI.


                                   ARTICLE XII

                    SATISFACTION AND DISCHARGE OF INDENTURE;
                                UNCLAIMED MONEYS


                  Section 12.1 Termination of Obligations  upon  Cancellation of
the  Debentures.  The Company may  terminate all of its  obligations  under this
Indenture (subject to Section 12.2) when:

                  (a) (i) all Debentures theretofore authenticated and delivered
         (other than  Debentures  that have been  destroyed,  lost or stolen and
         that have been replaced,  converted or paid as provided in Section 2.6)
         have been delivered to the Trustee for cancellation; and

                           (ii) the  Company  has paid or  caused to be paid all
         other sums payable  hereunder and under the  Debentures by the Company;
         or

                                       40

<PAGE>

                  (b) (i) the Debentures not previously delivered to the Trustee
         for  cancellation  shall have  become  due and  payable or are by their
         terms to become due and payable within one year or are to be called for
         redemption under arrangements satisfactory to the Trustee upon delivery
         of notice,  (ii) the Company shall have irrevocably  deposited with the
         Trustee, as trust funds, cash, in an amount sufficient to pay principal
         of premium,  if any, and  interest on the  outstanding  Debentures,  to
         maturity or  redemption,  as the case may be, (iii) such deposit  shall
         not result in a breach or violation of, or constitute a default  under,
         any agreement or instrument pursuant to which the Company is a party or
         by which it or its property is bound and (iv) the Company has delivered
         to  the  Trustee  an  Officers'   Certificate  in  form  and  substance
         reasonably   satisfactory  to  the  Trustee,   each  stating  that  all
         conditions related to such discharge have been complied with.

                  Section 12.2 Survival of Certain Obligations.  Notwithstanding
the satisfaction and discharge of this Indenture and of the Debentures  referred
to in Section 12.1,  the  respective  obligations of the Company and the Trustee
under  Sections 2.3,  2.4,  2.5,  2.6, 3.1, 4.2, 5.1, 6.4, 6.9, 7.5, 7.8,  12.4,
12.5, 12.6, Articles XIV and XV shall survive until the Debentures are no longer
outstanding,  and  thereafter,  the  obligations  of the Company and the Trustee
under Sections 6.9, 7.5, 12.4, 12.5 and 12.6 shall survive. Nothing contained in
this Article XII shall abrogate any of the rights,  obligations or duties of the
Trustee under this Indenture.

                  Section 12.3  Acknowledgment of Discharge by Trustee.  Subject
to Section 12.6,  after (i) the conditions of Section 12.1 have been  satisfied,
(ii) the Company has paid or caused to be paid all other sums payable  hereunder
by the Company and (iii) the Company has  delivered  to the Trustee an Officers'
Certificate  stating  that all  conditions  precedent  referred to in clause (i)
above  relating to the  satisfaction  and discharge of this  Indenture have been
complied with, the Trustee upon written request shall acknowledge in writing the
discharge of the Company's  obligations  under this  Indenture  except for those
surviving obligations specified in Section 12.2.

                  Section 12.4  Application  of Trust Assets.  The Trustee shall
hold any cash deposited with it in the irrevocable trust established pursuant to
Section 12.1. The Trustee shall apply the deposited cash in accordance with this
Indenture and the terms of the irrevocable trust agreement  established pursuant
to Section 12.1, as the case may be, to the payment of principal of, premium, if
any, and  interest on the  Debentures.  The cash so held in trust and  deposited
with the Trustee in compliance  with Section 12.1 shall not be part of the trust
estate under this Indenture,  but shall constitute a separate trust fund for the
benefit of all holders entitled thereto. Except as specifically provided herein,
the Trustee  shall not be  requested  to invest any  amounts  held by it for the
benefit of the holders or pay interest on uninvested amounts to any holder.

                  Section  12.5  Repayment  to  the  Company;  Unclaimed  Money.
Subject  to  applicable  laws  governing  escheat  of such  property,  and  upon
termination  of the trust  established  pursuant  to Section  12.1  hereof,  the
Trustee shall  promptly pay to the Company upon written  request any excess cash
held by them. Additionally, if amounts for the payment of principal, premium, if
any, or interest  remains  unclaimed  for two years,  the  Trustee  shall,  upon
written request, pay such amounts back to the Company forthwith. Thereafter, all

                                       41

<PAGE>

liability of the Trustee with respect to such amounts shall cease. After payment
to the  Company,  holders  entitled to such payment must look to the Company for
such payment as general  creditors unless an applicable  abandoned  property law
designates another person.

                  Section 12.6 Reinstatement.  If the Trustee is unable to apply
any cash in accordance with Section 12.1 by reason of any legal proceeding or by
reason  of  any  order  or  judgment  of any  court  or  governmental  authority
enjoining,  restraining or otherwise prohibiting such application, the Company's
obligations  under  this  Indenture  and the  Debentures  shall be  revived  and
reinstated as though no deposit had occurred pursuant to Section 12.1 until such
time as the  Trustee  is  permitted  to apply all such cash in  accordance  with
Section  12.1;  provided  that if the Company makes any payment of principal of,
premium,  if any, or interest on any Debentures  following the  reinstatement of
its obligations, the Company shall be subrogated to the rights of the holders of
such Debentures to receive such payment from the amounts held by the Trustee.


                                  ARTICLE XIII

                    IMMUNITY OF INCORPORATORS, SHAREHOLDERS,
                             OFFICERS AND DIRECTORS


                  Section  13.1  Indenture  and  Debentures   Solely   Corporate
Obligations.  No recourse for the payment of the  principal  of, or premium,  if
any, or interest on any  Debenture,  or for any claim based thereon or otherwise
in respect  thereof,  and no recourse under or upon any obligation,  covenant or
agreement of the Company in this Indenture or in any  supplemental  indenture or
in any  Debenture,  or because of the creation of any  indebtedness  represented
thereby,  shall  be  had  against  any  incorporator,  shareholder,  officer  or
director,  as such, past,  present or future, of the Company or of any successor
entity, either directly or through the Company or any successor entity,  whether
by virtue of any constitution,  statute or rule of law, or by the enforcement of
any assessment or penalty or otherwise;  it being expressly  understood that all
such liability is hereby expressly waived and released as a condition of, and as
a  consideration  for, the  execution of this  Indenture and the issuance of the
Debentures.


                                   ARTICLE XIV

                            CONVERSION OF DEBENTURES


                  Section 14.1      Right to Convert.

                  (a) Subject to and upon compliance with the provisions of this
Indenture,  the holder of any Debenture  shall have the one-time  right,  at the
option of such holder, at  any time after 90 days  following the  latest date of

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<PAGE>

original  issuance  of the  Debentures  and  prior to the close of  business  on
September 27, 2000 (except  that,  with respect to any Debenture or portion of a
Debenture that shall be called for redemption or delivered for repurchase,  such
right shall  terminate at the close of business  one  Business  Day  immediately
preceding  the date fixed for  redemption  or  repurchase  of such  Debenture or
portion of a  Debenture  unless the  Company  shall  default in payment due upon
redemption  thereof) to convert the principal  amount of any such Debenture,  or
any portion of such  principal  amount  that is $1,000 or an  integral  multiple
thereof,  up to a maximum of 30% (less any  amounts  converted  pursuant  to the
Mandatory  Conversion  described in Section 4.1(b)) of such holder's outstanding
principal amount of Debentures, into that number of fully paid and nonassessable
shares  (calculated  as to each  conversion  to the nearest 1/100 of a share) of
Common Stock (as such shares shall then be constituted) obtained by dividing the
aggregate  principal amount of the Debentures or portion thereof surrendered for
conversion by the  Conversion  Price in effect at such time as such amount shall
be  certified  by the  Company  as  provided  in an  Officers'  Certificate,  by
surrender of the  Debenture so to be converted in whole or in part in the manner
provided in Section  14.2. A holder of  Debentures is not entitled to any rights
of a holder of Common  Stock  until such  holder  has  converted  such  holder's
Debentures to Common Stock and only to the extent such  Debentures are deemed to
have been converted to Common Stock under this Article XIV.

                  (b) In the event that,  during any consecutive  20-Trading Day
period,  the average  closing  price of the  Company's  Common  Stock  equals or
exceeds $12.00 per share, the Company may, within 30 days of such 20-Trading Day
period,  require  the  conversion  (the  "Mandatory  Conversion")  of  up  to an
aggregate of 20% of the principal amount of outstanding Debentures, pro rata, at
the  Conversion  Price.  The  Company  shall give notice to the Trustee and each
Debentureholder  within ten days of the  20-Trading  Day period of its intent to
convert a portion of the Debentures.

                  Section 14.2  Exercise of  Conversion  Privilege;  Issuance of
Common Stock on Conversion; No Adjustment for Interest or Dividends. In order to
exercise the  conversion  privilege  with respect to any Debenture in definitive
form, the holder of any such Debenture to be converted in whole or in part shall
surrender such Debenture,  duly endorsed,  at an office or agency  maintained by
the Company pursuant to Section 4.2,  accompanied by the funds, if any, required
by the penultimate paragraph of this Section 14.2, and shall give written notice
of  conversion  in the form  provided  on the form of  Debenture  (or such other
notice  that is  acceptable  to the  Company)  to the office or agency  that the
holder elects to convert such Debenture or the portion thereof specified in said
notice. Such notice shall state the name,  telephone number and facsimile number
of the contact person for the Conversion Notice and shall also state the name or
names (with  address) in which the  certificate  or  certificates  for shares of
Common Stock that shall be issuable on such conversion shall be issued and shall
be accompanied by transfer  taxes,  if required  pursuant to Section 14.7.  Each
such Debenture  surrendered for conversion shall,  unless the shares issuable on
conversion  are to be issued in the name of the holder of such  Debenture  as it
appears on the Debenture  register,  be duly endorsed by, or be  accompanied  by
instruments  of transfer in form  satisfactory  to the Company duly executed by,
the holder or his duly authorized attorney.

                                       43

<PAGE>

                  As  promptly  as  practicable   after   satisfaction   of  the
requirements  for conversion set forth above,  subject to Section 14.1(b) and in
compliance  with any  restrictions  on transfer if shares issuable on conversion
are to be issued in a name  other than that of the  Debentureholder  (as if such
transfer were a transfer of the Debenture or Debentures (or portion  thereof) so
converted),  the  Company  shall  issue and shall  deliver to such holder at the
office or agency  maintained by the Company for such purpose pursuant to Section
4.2, a certificate or  certificates  for the number of full shares issuable upon
the  conversion  of such  Debenture or portion  thereof in  accordance  with the
provisions of this Article XIV and a check or cash in respect of any  fractional
interest in respect of a Common Stock arising upon such conversion,  as provided
in Section  14.3. In case any  Debenture of a  denomination  greater than $1,000
shall be  surrendered  for partial  conversion,  and subject to Section 2.3, the
Company shall execute and the Trustee shall  authenticate and make available for
delivery to the holder of the Debenture so surrendered, without charge to him, a
new  Debenture  or  Debentures  in  authorized  denominations  in  an  aggregate
principal amount equal to the unconverted portion of the surrendered Debenture.

                  Each  conversion  shall be deemed to have been  effected as to
any such  Debenture (or portion  thereof) on the date on which the  requirements
set forth above in this  Section 14.2 have been  satisfied as to such  Debenture
(or portion thereof),  and, subject to Section 14.1(b), the person in whose name
any  certificate  or  certificates  for shares of Common Stock shall be issuable
upon such  conversion  shall be deemed to have become on said date the holder of
record of the shares  represented  thereby;  provided that any such surrender on
any date when the stock  transfer  books of the  Company  shall be closed  shall
constitute  the  person in whose name the  certificates  are to be issued as the
record holder thereof for all purposes on the next  succeeding day on which such
stock transfer books are open,  but such  conversion  shall be at the Conversion
Price  in  effect  on the  date  upon  which  such  Debenture  shall  have  been
surrendered.

                  Any Debenture or portion  thereof  surrendered  for conversion
during the period from the close of business on the record date for any interest
payment date to the opening of business on the next succeeding  interest payment
date shall (unless such Debenture or portion  thereof being converted shall have
been called for redemption on a redemption date during the period from the close
of business on or after any record date for the payment of interest to the close
of business on the business day following  the  corresponding  interest  payment
date) be  accompanied  by payment,  in funds  acceptable  to the Company,  of an
amount equal to the interest payable on such succeeding interest payment date on
the principal amount being converted; provided that no such payment need be made
if there  shall  exist at the time of  conversion  a default  in the  payment of
interest on the Debentures. An amount equal to such payment shall be paid by the
Company  on the  corresponding  interest  payment  date  to the  holder  of such
Debenture  at the close of business on such record  date;  provided  that if the
Company shall default in the payment of interest on such interest  payment date,
such  amount  shall be paid to the person who made such  required  payment.  The
interest  payment with respect to a Debenture  called for  redemption  on a date
between  the close of business on any record date for the payment of interest to
the close of business on the business day following the  corresponding  interest
payment date and surrendered for conversion  during that period shall be payable
on the corresponding interest payment date to the registered holder at the close

                                       44
<PAGE>

of  business  on  that  record  date  (notwithstanding  the  conversion  of such
Debenture  before  the  corresponding  interest  payment  date) and a holder who
elects to  convert  during  that  period  need not  include  funds  equal to the
interest  paid.  Except as provided  above in this Section  14.2,  no adjustment
shall be made for interest  accrued on any Debenture  converted or for dividends
on any shares issued upon the  conversion of such  Debenture as provided in this
Article XIV.

                  Section 14.3 Cash  Payments in Lieu of Fractional  Shares.  No
fractional shares of Common Stock or scrip representing  fractional shares shall
be issued upon  conversion of  Debentures.  If more than one Debenture  shall be
surrendered  for conversion at one time by the same holder,  the number of fully
paid and  nonassessable  shares of Common Stock  issuable  upon  conversion of a
Debenture shall be determined by dividing the aggregate principal amount of such
Debentures or portion thereof surrendered for conversion by the Conversion Price
in effect at such time. The aggregate  number of shares of Common Stock issuable
upon  conversion  shall be rounded to the nearest  1/100th of a share (with .005
being rolled  upward).  If any fractional  share of stock would be issuable upon
the  conversion  of any  Debenture  or  Debentures,  the  Company  shall make an
adjustment  therefor in cash determined by multiplying  the fractional  share by
the Conversion Price.

                  Section 14.4 Conversion  Price.  The Conversion Price shall be
equal to the greater of (i) 85% of the average  closing  price of the  Company's
Common Stock during the  20-Trading Day period ending on the date upon which the
holder  exercises  the right of  conversion,  and (ii) $12.00 per share  (herein
called the  "Conversion  Price"),  subject to  adjustment  as  provided  in this
Article XIV.

                  Section 14.5  Adjustment of Conversion  Price.  The Conversion
Price shall be adjusted from time to time by the Company as follows:

                  (a) In case the  Company  shall (i) pay a  dividend  or make a
         distribution  on its  outstanding  Common Stock in shares of its Common
         Stock,  (ii)  subdivide  or split its  outstanding  Common Stock into a
         greater number of shares,  (iii) combine its  outstanding  Common Stock
         into a smaller  number of shares or (iv)  issue any  shares of  capital
         stock by  reclassification of its Common Stock, the conversion price in
         effect  immediately  prior thereto shall be adjusted so that the holder
         of any  Debentures  thereafter  surrendered  for  conversion  shall  be
         entitled to receive the number of shares of Common Stock of the Company
         which such  holder  would have owned or have been  entitled  to receive
         after the  occurrence  of any of the  events  described  above had such
         Debentures  been  surrendered for conversion  immediately  prior to the
         occurrence  of such event or the record  date  therefor,  whichever  is
         earlier.  An  adjustment  made  pursuant to this  subsection  (a) shall
         become effective  immediately after the close of business on the record
         date  for  determination  of  shareholders  entitled  to  receive  such
         dividend  or  distribution  in the case of a dividend  or  distribution
         (except as  provided in Section  14.5(e))  and shall  become  effective
         immediately  after the close of business on the  effective  date in the
         case of a subdivision, split, combination or reclassification.

                                       45

<PAGE>

                  (b) In case the  Company  shall,  by  dividend  or  otherwise,
         distribute property or assets to all holders of its Common Stock (other
         than any dividends or distributions  of the Company's  Capital Stock to
         which  Section  14.5(a)   applies),   and  excluding  any  dividend  or
         distribution  (x) in connection  with the  liquidation,  dissolution or
         winding-up of the Company,  whether  voluntary or  involuntary,  (y) in
         cash or (z)  referred  to in  Section  14.5(a)  (any  of the  foregoing
         hereinafter in this Section 14.5(b) called the  "Property")),  then, in
         each such case,  the Company  shall make proper  provision so that each
         Debentureholder who converts a Debenture (or any portion thereof) after
         the date fixed for  determination  of shareholders  entitled to receive
         such distribution shall be entitled to receive upon such conversion, in
         addition to the shares of Common Stock  issuable upon such  conversion,
         the  amount  and kind of  Property  that such  holder  would  have been
         entitled  to  receive if such  holder  had,  immediately  prior to such
         determination date, converted such Debenture into Common Stock.

                  (c) The Company  may make such  reductions  in the  Conversion
         Price, in addition to those required by Sections 14.5(a),  as the Board
         of Directors  considers to be advisable to avoid or diminish any income
         tax to  holders  of Common  Stock or rights to  purchase  Common  Stock
         resulting  from any  dividend  or  distribution  of stock (or rights to
         acquire  stock)  or from  any  event  treated  as such for  income  tax
         purposes.  To the extent  permitted by applicable law, the Company from
         time to time may  reduce  the  Conversion  Price by any  amount for any
         period of time if the  period  is at least 20 days,  the  reduction  is
         irrevocable  during the period  and the Board of  Directors  shall have
         made a determination that such reduction would be in the best interests
         of the Company,  which  determination shall be conclusive and described
         in a  Board  Resolution.  Whenever  the  Conversion  Price  is  reduced
         pursuant  to the  preceding  sentence,  the  Company  shall mail to all
         holders of record of the  Debentures a notice of the reduction at least
         15 days prior to the date the reduced  Conversion  Price takes  effect,
         and such notice shall state the reduced Conversion Price and the period
         it shall be in effect.

                  (d) No  adjustment in the  Conversion  Price shall be required
         unless  such  adjustment  would  require an  increase or decrease of at
         least 1% in such price; provided that any adjustments that by reason of
         this  Section  14.5(d)  are not  required  to be made  shall be carried
         forward  and taken  into  account  in any  subsequent  adjustment.  All
         calculations  under this  Article  XIV shall be made by the Company and
         shall be made to the nearest 1/100 (with 0.005 being rolled upward).

                  No adjustment  need be made for a change in the par value,  or
         to or from no par value, of the Common Stock.

                  To the extent the  Debentures  become  convertible  into cash,
         assets,  property  or  securities  (other  than  Common  Stock  of  the
         Company), no adjustment need be made thereafter as to the cash, assets,
         property or such securities (except as such securities may otherwise by
         their terms provide), and interest shall not accrue on such cash.

                                       46

<PAGE>

                  (e)  Whenever  the  Conversion  Price is  adjusted  as  herein
         provided,  the  Company  shall  promptly  file with the Trustee and any
         conversion  agent  other  than the  Trustee  an  Officers'  Certificate
         setting forth the  Conversion  Price after such  adjustment and setting
         forth  a  brief  statement  of the  facts  requiring  such  adjustment.
         Promptly after delivery of such certificate,  the Company shall prepare
         a notice of such  adjustment of the Conversion  Price setting forth the
         adjusted Conversion Price and the date on which each adjustment becomes
         effective  and  shall  mail  such  notice  of  such  adjustment  of the
         Conversion  Price to the holder of each  Debenture  at his last address
         appearing on the Debenture register provided for in Section 2.5, within
         20 days after execution  thereof.  Failure to deliver such notice shall
         not effect the legality or validity of any such adjustment.

                  Section 14.6 Effect of Reclassification, Consolidation, Merger
or Sale. If any of the following events occur,  namely (i) any  reclassification
or change of  outstanding  shares of Common  Stock  (other  than a change in par
value, or to or from no par value, as a result of a subdivision or combination),
(ii) any  consolidation,  merger or  combination  of the  Company  with  another
corporation  as a result of which  holders of Common  Stock shall be entitled to
receive  stock,  securities or other  property or assets  (including  cash) with
respect to or in exchange for such Common Stock or (iii) any sale or  conveyance
of the properties and assets of the Company as, or substantially as, an entirety
(determined  on a  consolidated  basis) to any other  corporation as a result of
which holders of Common Stock shall be entitled to receive stock,  securities or
other  property or assets  (including  cash) with  respect to or in exchange for
such Common Stock, then the Company or the successor or purchasing  corporation,
as the case may be,  shall  execute  with the Trustee a  supplemental  indenture
providing that the Debentures  shall be convertible  into the kind and amount of
shares of stock and other  securities  or  property or assets  (including  cash)
receivable   upon  such   reclassification,   change,   consolidation,   merger,
combination,  sale or  conveyance  by a holder  of a number  of shares of Common
Stock issuable upon conversion of such Debentures (assuming,  for such purposes,
a sufficient  number of authorized  shares of Common Stock  available to convert
all  such  Debentures)  immediately  prior  to  such  reclassification,  change,
consolidation,  merger, combination, sale or conveyance, assuming such holder of
Common Stock did not exercise his rights of election,  if any, as to the kind or
amount   of   securities,   cash  or  other   property   receivable   upon  such
reclassification, change, consolidation, merger, combination, sale or conveyance
(provided  that,  if the kind or amount of  securities,  cash or other  property
receivable   upon  such   reclassification,   change,   consolidation,   merger,
combination,  sale or  conveyance is not the same for each share of Common Stock
in  respect  of which  such  rights of  election  shall not have been  exercised
("non-electing  share"), then for the purposes of this Section 14.6 the kind and
amount   of   securities,   cash  or  other   property   receivable   upon  such
reclassification, change, consolidation, merger, combination, sale or conveyance
for each  non-electing  share  shall be  deemed  to be the  kind and  amount  so
receivable  per  share  by  a  plurality  of  the  non-electing   shares).  Such
supplemental  indenture  shall provide for  adjustments  that shall be as nearly
equivalent as may be practicable to the adjustments provided for in this Article
XIV.

                                       47

<PAGE>

                  The  Company  shall  cause  notice  of the  execution  of such
supplemental indenture to be mailed to each holder of Debentures, at his address
appearing on the Debenture  register provided for in Section 2.5, within 20 days
after  execution  thereof.  Failure to deliver  such notice shall not affect the
legality or validity of such supplemental indenture.

                  The above  provisions  of this  Section  14.6 shall  similarly
apply  to  successive  reclassifications,   changes,  consolidations,   mergers,
combinations, sales and conveyances.

                  Section  14.7 Taxes on Shares  Issued.  The  issuance of stock
certificates  on conversions  of Debentures  shall be made without charge to the
converting  Debentureholder  for any  transfer  or similar tax in respect of the
issue thereof.  The Company shall not, however,  be required to pay any tax that
may be payable in respect of any transfer  involved in the issue and delivery of
stock in any name other than that of the holder of any Debenture converted,  and
the Company shall not be required to issue or deliver any such stock certificate
unless and until the person or persons  requesting  the issuance  thereof  shall
have paid to the Company the amount of such tax or shall have established to the
satisfaction of the Company that such tax has been paid.

                  Section 14.8  Reservation of Shares;  Shares to Be Fully Paid.
The Company shall provide,  free from preemptive  rights,  out of its authorized
but unissued shares or shares held in treasury, sufficient shares to provide for
the  conversion  of the  Debentures  from  time to time as such  Debentures  are
presented for conversion.

                  Before  taking  any  action  that  would  cause an  adjustment
reducing the Conversion Price below the then par value, if any, of the shares of
Common Stock issuable upon conversion of the Debentures,  the Company shall take
all  corporate  action that may, in the opinion of its counsel,  be necessary in
order that the Company may validly and legally issue shares of such Common Stock
at such adjusted Conversion Price.

                  The Company covenants that all shares of Common Stock that may
be issued upon conversion of Debentures shall, upon issuance,  be fully paid and
nonassessable  by the  Company and free from all taxes,  liens and charges  with
respect to the issuance thereof.

                  Section 14.9  Responsibility  of Trustee.  The Trustee and any
other conversion agent shall not at any time be under any duty or responsibility
to any  holder of  Debentures  to  determine  whether  any facts  exist that may
require  any  adjustment  of the  Conversion  Price or notice  thereof,  or with
respect to the nature,  accuracy or extent or calculation of any such adjustment
when  made,  or  with  respect  to the  method  employed,  or  herein  or in any
supplemental  indenture provided to be employed, in making the same. The Trustee
and any other  conversion  agent shall not be  accountable  with  respect to the
validity or value (or the kind or amount) of any shares of Common  Stock,  or of
any securities or property, that may at any time be issued or delivered upon the
conversion of any Debenture; and the Trustee and any other conversion agent make
no  representations  with respect thereto or actions or omissions by the Company
in connection  with this Article XIV.  Subject to the provisions of Section 7.1,

                                       48

<PAGE>

neither the  Trustee  nor any  conversion  agent  shall be  responsible  for any
failure of the Company to issue,  transfer or deliver any shares of Common Stock
or stock certificates or other securities or property or cash upon the surrender
of any  Debenture  for the  purpose of  conversion  or to comply with any of the
duties,  responsibilities  or covenants of the Company contained in this Article
XIV. Without  limiting the generality of the foregoing,  neither the Trustee nor
any conversion agent shall be under any  responsibility  to determine  whether a
supplemental  indenture under Section 14.6 hereof need to be entered into or the
correctness of any provisions  contained in any supplemental  indenture  entered
into pursuant to Section 14.6 relating either to the kind or amount of shares of
stock or securities or property  (including cash) receivable by Debentureholders
upon the  conversion  of their  Debentures  after any event  referred to in such
Section  14.6 or to any  adjustment  to be made with  respect  thereto,  and may
accept as conclusive  evidence of the  correctness of any such  provisions,  and
shall be protected in relying upon, the Officers' Certificate (which the Company
shall be obligated to file with the Trustee  prior to the  execution of any such
supplemental indenture) with respect thereto.

                  Section 14.10 Notice to Holders Prior to Certain  Actions.  In
case:

                  (a) the Company makes any  distribution or dividend that would
         require an adjustment in the Conversion Price pursuant to Section 14.5;
         or

                  (b)  the  Company  takes  any  action  that  would  require  a
         supplemental indenture pursuant to Section 14.6; or

                  (c)  of the voluntary or  involuntary dissolution, liquidation
         or winding-up of the Company,

the  Company  shall  cause to be filed with the Trustee and to be mailed to each
holder of Debentures  at his address  appearing on the  Debenture  register,  as
promptly as possible  but in any event at least 15 days prior to the  applicable
date hereinafter specified, a notice stating (x) the date on which a record date
is to be taken for the purpose of such dividend,  distribution,  rights, options
or  warrants,  or,  if a record  is not to be  taken,  the date as of which  the
holders of Common Stock of record to be entitled to such dividend, distribution,
rights,  options or warrants are to be  determined or (y) the date on which such
reclassification,  change,  consolidation,  merger, sale, conveyance,  transfer,
dissolution,  liquidation or winding-up is expected to become effective or occur
and the date as of which it is expected  that  holders of record of Common Stock
shall be  entitled  to  exchange  their  Common  Stock for  securities  or other
property deliverable upon such reclassification,  change, consolidation, merger,
sale, conveyance, transfer, dissolution,  liquidation or winding-up. Neither the
failure to give such notice nor any defect  therein shall affect the legality or
validity  of the  proceedings  referenced  in clauses  (a)  through  (c) of this
Section 14.10.

                                       49

<PAGE>

                                   ARTICLE XV

                                  SUBORDINATION


                  Section 15.1 Agreement to Subordinate. The Company agrees, and
each  Debentureholder  by accepting a Debenture  agrees,  that the  indebtedness
evidenced by the Debentures is subordinated  in right of payment,  to the extent
and in the manner  provided in this Article XV, to the prior  payment in full of
all Senior  Indebtedness  and that the  subordination  is for the benefit of the
holders of Senior Indebtedness.

                  Section 15.2 Certain Definitions. For purposes of this Article
XV, the following terms shall have the meaning indicated:

                  (1)  "Representative"  shall mean a duly authorized  indenture
         trustee  or other  trustee,  agent  or  representative  for any  Senior
         Indebtedness.

                  (2) "Senior Indebtedness" with respect to the Debentures means
         the principal of, premium, if any, and interest (including any interest
         accruing subsequent to a bankruptcy or other similar proceeding whether
         or not such  interest is an allowed claim  enforceable  in a bankruptcy
         case)  on,  and  any  fees,  costs,  expenses  and  any  other  amounts
         (including  indemnity  payments)  related  to  the  following,  whether
         outstanding  on the date hereof or hereafter  incurred or created:  (a)
         indebtedness,  matured or unmatured,  whether or not contingent, of the
         Company  to   NationsCredit   Commercial   Corporation,   through   its
         NationsCredit   Commercial  Funding  Division,   its  affiliates,   its
         successors or its assigns,  regardless of whether evidenced by notes or
         other written  obligations,  (b)  indebtedness  of others of any of the
         kinds  described in the  preceding  clause (a) assumed or guaranteed by
         the Company and (c) renewals,  extensions,  modifications,  amendments,
         and  refundings  of, and  indebtedness  and  obligations of a successor
         person issued in exchange for or in  replacement  of,  indebtedness  or
         obligations  of the kinds  described in the  preceding  clauses (a) and
         (b),  unless  the  agreement  pursuant  to which any such  indebtedness
         described  in clauses (a) through  (c) is created,  issued,  assumed or
         guaranteed  expressly  provides that such indebtedness is not senior or
         superior  in right of  payment  to the  Debentures;  provided  that the
         following   shall  not   constitute   Senior   Indebtedness:   (i)  any
         indebtedness or obligation of the Company in respect of the Debentures,
         (ii) any indebtedness  that is subordinated or junior in any respect to
         any other  indebtedness of the Company other than Senior  Indebtedness;
         and  (iii)  any  indebtedness  incurred  for the  purchase  of goods or
         materials in the ordinary course of business.

                  For the purposes of this Indenture,  Senior Indebtedness shall
not be  deemed  to have  been  paid in full  until  the  holders  of the  Senior
Indebtedness  shall have  indefeasibly  received  payment in full in cash of all
Senior  Indebtedness;  provided that if any holder of Senior Indebtedness agrees
to accept payment in full of such Senior  Indebtedness for  consideration  other
than cash, such holder shall be deemed to have indefeasibly  received payment in

                                       50

<PAGE>

full of such  Senior  Indebtedness.  The  provisions  of this  Article  XV shall
continue to be  effective or be  reinstated,  as the case may be, if at any time
any payment of any of the Senior  Indebtedness is rescinded or must otherwise be
returned by any holder of Senior Indebtedness upon the insolvency, bankruptcy or
reorganization  of the Company or otherwise,  all as though such payment had not
been made.

                  A  distribution  may  consist  of  cash,  securities  or other
property, by set-off or otherwise.

                  Section 15.3 Liquidation;  Dissolution;  Bankruptcy.  Upon any
distribution  to creditors of the Company in a liquidation or dissolution of the
Company or in a bankruptcy, reorganization,  insolvency, receivership or similar
proceeding  relating to the Company or its property,  in an  assignment  for the
benefit of creditors or any marshalling of the Company's assets and liabilities,
(a)  holders of all  Senior  Indebtedness  shall  first be  entitled  to receive
payment  in  full  of  all  amounts   due  or  to  become  due  thereon   before
Debentureholders  shall be entitled to receive any payment  with  respect to the
principal  of,  premium,  if any,  or interest on the  Debentures  (except  that
Debentureholders  may receive  securities that are  subordinated to at least the
same extent as the Debentures to Senior  Indebtedness and any securities  issued
in exchange for Senior  Indebtedness) and (b) until all Senior  Indebtedness (as
provided  in  clause  (a)  above)  is paid in full,  any  distribution  to which
Debentureholders would be entitled but for this Article shall be made to holders
of Senior Indebtedness (except that Debentureholders may receive securities that
are  subordinated  to at least the same extent as the  Debentures  to (x) Senior
Indebtedness and (y) any securities issued in exchange for Senior Indebtedness),
as their interests may appear.

                  Section 15.4 Default on Senior  Indebtedness.  The Company may
not make any  payment  upon or in  respect  of the  Debentures  (except  in such
subordinated   securities)   and  may  not  acquire  from  the  Trustee  or  any
Debentureholder  any Debenture for cash or property  (other than securities that
are  subordinated  to at least the same  extent as the  Debenture  to (i) Senior
Indebtedness and (ii) any securities issued in exchange for Senior Indebtedness)
until all Senior Indebtedness has been paid in full if:

                  (a) a default in the payment of the principal of, premium,  if
         any, or interest on Senior Indebtedness occurs and is continuing beyond
         any applicable period of grace (a "Payment Default"); or

                  (b)  a  default,  other  than  a  Payment  Default  on  Senior
         Indebtedness  occurs  and is  continuing  that  permits  holders of the
         Senior  Indebtedness as to which such default relates to accelerate its
         maturity  (a  "Nonpayment  Default")  and the  Trustee  or the  Company
         receives  a  notice  of  the  default   from  the   Representative   or
         Representatives  of holders of at least a majority in principal  amount
         of Senior Indebtedness then outstanding.

                                       51

<PAGE>

                  The Company may and shall resume payments on and distributions
in respect of the  Debentures  and may  acquire  them upon the date on which the
default is cured or waived, in writing, if this Article XV otherwise permits the
payment, distribution or acquisition at the time of such payment or acquisition.

                  Section 15.5 When Distribution Must Be Paid Over. In the event
that  the  Trustee  (or  paying   agent  if  other  than  the  Trustee)  or  any
Debentureholder  receives any payment of  principal or interest  with respect to
the Debentures at a time when such payment is prohibited by Section 15.3 or 15.4
hereof, such payment shall be held by the Trustee (or paying agent if other than
the  Trustee)  or such  Debentureholder,  in  trust  for  the  benefit  of,  and
immediately  shall be paid over and  delivered,  upon written  request,  to, the
holders  of  Senior   Indebtedness  as  their  interests  may  appear  or  their
Representative under the indenture or other agreement (if any) pursuant to which
Senior  Indebtedness  may have been issued,  as their  respective  interests may
appear,  for  application  to the payment of all Senior  Indebtedness  remaining
unpaid  to the  extent  necessary  to pay  all  Senior  Indebtedness  in full in
accordance  with its terms,  after giving  effect to any  concurrent  payment or
distribution to or for the holders of Senior Indebtedness.

                  With  respect  to the  holders  of  Senior  Indebtedness,  the
Trustee  undertakes to perform only such  obligations on the part of the Trustee
as are  specifically  set forth in this Article XV, and no implied  covenants or
obligations  with  respect to the holders of Senior  Indebtedness  shall be read
into this Indenture against the Trustee.  The Trustee shall not be deemed to owe
any fiduciary duty to the holders of Senior Indebtedness and shall not be liable
to any such holders if the Trustee  shall pay over or distribute to or on behalf
of  Debentureholders or the Company or any other person money or assets to which
any holders of Senior  Indebtedness  shall be entitled by virtue of this Article
XV,  except if such  payment is made as a result of the  willful  misconduct  or
gross negligence of the Trustee.

                  Section  15.6 Notice by Company.  The Company  shall  promptly
notify the  Trustee  and the paying  agent in writing of any facts  known to the
Company that would cause a payment of any  principal or interest with respect to
the Debentures to violate this Article XV, but failure to give such notice shall
not affect the  subordination  of the Debentures to the Senior  Indebtedness  as
provided in this Article XV.

                  Section 15.7  Subrogation.  Until all Senior  Indebtedness  is
paid in full and until the Debentures are paid in full,  Debentureholders  shall
be subrogated  (equally and ratably with all other  indebtedness pari passu with
the Debentures) to the rights of holders of Senior Indebtedness (but subordinate
to the rights of the holders of Senior  Indebtedness)  to receive  distributions
applicable to Senior  Indebtedness  to the extent that  distributions  otherwise
payable  to the  Debentureholders  have been  applied  to the  payment of Senior
Indebtedness.  A  distribution  made under this  Article XV to holders of Senior
Indebtedness that otherwise would have been made to  Debentureholders is not, as
between  the  Company  and  Debentureholders,  a payment  by the  Company on the
Debentures.

                  Section  15.8  Relative  Rights.  This  Article XV defines the
relative rights of Debentureholders and holders of Senior Indebtedness.  Nothing
in this Indenture shall:

                                       52

<PAGE>

                  (a) impair,  as between the Company and the  Debentureholders,
         the obligation of the Company, which is absolute and unconditional,  to
         pay principal of,  premium,  if any, and interest on the  Debentures in
         accordance with their terms;

                  (b)  affect  the  relative  rights  of  Debentureholders   and
         creditors of the Company other than their rights in relation to holders
         of Senior Indebtedness; or

                  (c) prevent the Trustee or any Debentureholder from exercising
         its available  remedies upon a default or Event of Default,  subject to
         the rights of  holders  and  owners of Senior  Indebtedness  to receive
         distributions and payments otherwise payable to Debentureholders.

                  If  the  Company  fails  because  of  this  Article  XV to pay
principal of,  premium,  if any, or interest on a Debenture on the due date, the
failure is still a default or Event of Default.

                  Section 15.9 Subordination May Not Be Impaired by Company.  No
right of any holder of Senior  Indebtedness to enforce the  subordination of the
indebtedness evidenced by the Debentures shall be impaired by any act or failure
to act by the  Company  or any  holder of  Debentures  or by the  failure of the
Company or any holder of Debentures to comply with this Indenture.

                  Section  15.10   Distribution  or  Notice  to  Representative.
Whenever  a  distribution  is to be made or a notice  given to holders of Senior
Indebtedness,  the  distribution  may be made  and the  notice  given  to  their
Representative.

                  Upon any  payment  or  distribution  of assets of the  Company
referred to in this  Article XV, the Trustee and the  Debentureholders  shall be
entitled  to rely  upon  any  order or  decree  made by any  court of  competent
jurisdiction  or  upon  any  certificate  of  such   Representative  or  of  the
liquidating  trustee or agent or other  person  making any  distribution  to the
Trustee or to the  Debentureholders  for the purpose of ascertaining the persons
entitled  to  participate  in  such  distribution,  the  holders  of the  Senior
Indebtedness  and other  indebtedness  of the  Company,  the  amount  thereof or
payable thereon, the amount or amounts paid or distributed thereon and all other
facts pertinent thereto or to this Article XV.

                  Section   15.11   Rights  of   Trustee   and   Paying   Agent.
Notwithstanding the provisions of this Article XV or any other provision of this
Indenture,  the Trustee shall not be charged with  knowledge of the existence of
any facts that would prohibit the making of any payment or  distribution  by the
Trustee,  and the Trustee and the paying agent may continue to make  payments on
the  Debentures,  unless the Trustee  shall have actual  knowledge or shall have
received at its Corporate Trust Office at least three Business Days prior to the
date of such payment written notice of facts that would cause the payment of any
principal,  premium,  if any, and interest  with  respect to the  Debentures  to
violate  this  Article  XV. Only the  Company or a  Representative  may give the
notice.  Nothing in this  Article XV shall impair the claims of, or payments to,
the Trustee under or pursuant to Section 7.6 hereof.

                                       53

<PAGE>

                  The Trustee shall be entitled to rely on the delivery to it of
a written notice by a person  representing  such person to be a holder of Senior
Indebtedness  (or a trustee or agent on behalf of such holder) to establish that
such notice has been given by a holder of Senior  Indebtedness  (or a trustee or
agent on behalf of any such holder). In the event that the Trustee determines in
good faith that  further  evidence is required  with respect to the right of any
person as a holder of Senior  Indebtedness  to  participate  in any  payment  or
distribution pursuant to this Article XV, the Trustee may request such person to
furnish evidence to the reasonable  satisfaction of the Trustee as to the amount
of Senior  Indebtedness held by such person,  the extent to which such person is
entitled to  participate  in such  payment or  distribution  and any other facts
pertinent  to the  rights of such  person  under  this  Article  XV, and if such
evidence is not  furnished,  the  Trustee may defer any payment  which it may be
required to make for the  benefit of such  person  pursuant to the terms of this
Indenture  pending  judicial  determination  as to the rights of such  person to
receive such payment.

                  The Trustee in its  individual or any other  capacity may hold
Senior  Indebtedness  with the same rights it would have if it were not Trustee.
Any paying agent, any authenticating  agent, any conversion agent, any Debenture
registrar and their successors may do the same with like rights.

                  Section  15.12  Authorization  to Effect  Subordination.  Each
holder of a Debenture by the holder's  acceptance thereof authorizes and directs
the Trustee on the  holder's  behalf to take such action as may be  necessary or
appropriate to effectuate the  subordination  as provided in this Article XV and
appoints  the Trustee to act as the  holder's  attorney-in-fact  for any and all
such purposes.  Without limiting the foregoing,  each  Representative  is hereby
irrevocably  authorized  and  empowered  (in its own  name or in the name of the
Debentureholders or the Trustee or otherwise),  but shall have no obligation, to
demand,  sue for, collect and receive every payment or distribution  referred to
in  Section  15.3 above and give  acquittance  therefor  and to file  claims and
proofs of claim and take such other action as it may deem necessary or advisable
for the exercise or enforcement of any of the rights or interests of the holders
or owners of the Senior  Indebtedness  hereunder;  provided that for purposes of
this Section 15.12 holders or owners of Senior Indebtedness may act only through
such Representative.

                  Section 15.13 Conversions Not Deemed Payment. For the purposes
of this  Article  XV only,  the  issuance  and  delivery  of Common  Stock  upon
conversion of the Debentures in accordance  with Article XIV shall not be deemed
to  constitute  a payment or  distribution  on account  of the  principal  of or
interest on the Debentures or on account of the purchase or other acquisition of
Debentures.  Nothing contained in this Article or elsewhere in this Indenture or
in the  Debentures  is intended to or shall  impair,  as among the Company,  its
creditors other than holders of Senior Indebtedness and the holders,  the right,
which is absolute and  unconditional,  of the holder of any Debenture to convert
such Debenture in accordance with Article XIV.

                  Section 15.14  Amendments.  The  provisions of this Article XV
shall not be amended or modified  without the written  consent of the holders of
Senior Indebtedness.

                                       54

<PAGE>

                                   ARTICLE XVI

                            MISCELLANEOUS PROVISIONS


                  Section 16.1 Provisions Binding on Company's  Successors.  All
the covenants,  stipulations,  promises and agreements in this Indenture made by
the Company shall bind its successors and assigns whether so expressed or not.

                  Section 16.2  Official Acts by Successor  Company.  Any act or
proceeding by any provision of this Indenture  authorized or required to be done
or  performed  by any board  (including  the Board of  Directors),  committee or
officer of the Company shall and may be done and  performed  with like force and
effect by the like board,  committee or officer of any corporation that shall at
the time be the lawful sole successor of the Company.

                  Section 16.3 Addresses for Notices,  Etc. Any notice or demand
that by any provision of this  Indenture is required or permitted to be given or
served by the Trustee or by the holders of  Debentures  on the Company  shall be
deemed to have been  sufficiently  given or made,  for all  purposes if given or
served by being sent by prepaid  overnight  delivery or being deposited  postage
prepaid by  registered  or certified  mail in a post office letter box addressed
(until  another  address is filed by the  Company  with the  Trustee)  to Fields
Aircraft  Spares,  Inc.,  2251-A Ward Avenue,  Simi Valley,  California,  93005,
Attention:  President,  with a copy to William D. Marsh, Ballard Spahr Andrews &
Ingersoll,  201 South Main, Suite 1200, Salt Lake City, Utah, 84111. Any notice,
direction, request or demand hereunder to or upon the Trustee shall be deemed to
have been  sufficiently  given or made, for all purposes,  if given or served by
being sent by prepaid  overnight  delivery or being deposited postage prepaid by
registered  or  certified  mail in a post  office  letter box  addressed  to the
Corporate Trust Office of the Trustee,  which office is, at the date as of which
this  Indenture  is dated,  located  at  Gartenstrasse  10,    CH-8002,  Zurich,
Switzerland, Attention: Dr. Dieter Wicki.

                  The  Trustee,   by  notice  to  the  Company,   may  designate
additional or different addresses for subsequent notices or communications.

                  Any notice or communication mailed to a Debentureholder  shall
be mailed to him by first class mail,  postage  prepaid,  at the address of such
Debentureholder   as  it  appears  on  the  Debenture   register  and  shall  be
sufficiently  given  to  such  Debentureholder  if so  mailed  within  the  time
prescribed.

                  Failure to mail a notice or communication to a Debentureholder
or any  defect in it shall not  affect  its  sufficiency  with  respect to other
Debentureholders.  If a notice or communication is mailed in the manner provided
above, it is duly given, whether or not the addressee receives it.

                                       55

<PAGE>

                  Section 16.4 Governing Law. This Indenture  shall be deemed to
be a contract made under the substantive laws of Utah and for all purposes shall
be construed in accordance with the  substantive  laws of Utah without regard to
conflicts of laws principles thereof.

                  Section 16.5 Evidence of Compliance with Conditions Precedent;
Certificates  to Trustee.  Upon any  application or demand by the Company to the
Trustee to take any action under any of the  provisions of this  Indenture,  the
Company shall furnish to the Trustee an Officers'  Certificate  stating that all
conditions  precedent,  if any,  provided for in this Indenture  relating to the
proposed action have been complied with, and an Opinion of Counsel stating that,
in the opinion of such counsel, all such conditions precedent have been complied
with.

                  Each certificate or opinion provided for in this Indenture and
delivered to the Trustee with respect to compliance with a condition or covenant
provided for in this Indenture  shall  include:  (1) a statement that the person
making such  certificate  or opinion has read such covenant or condition,  (2) a
brief statement as to the nature and scope of the  examination or  investigation
upon which the statement or opinion  contained in such certificate or opinion is
based,  (3) a statement  that,  in the opinion of such person,  he has made such
examination  or  investigation  as is  necessary  to enable  him to  express  an
informed  opinion as to  whether  or not such  covenant  or  condition  has been
complied  with and (4) a statement  as to whether or not, in the opinion of such
person, such condition or covenant has been complied with.

                  Section  16.6 Legal  Holidays.  In any case where any interest
payment date,  date fixed for redemption or stated  maturity of any Debenture or
the last date on which a holder has the right to convert  his  Debentures  shall
not be a  Business  Day,  then  (notwithstanding  any  other  provision  of this
Indenture or of the  Debentures)  payment of interest or principal (and premium,
if any) or conversion of the  Debentures  need not be made on such date, but may
be made on the next succeeding Business Day with the same force and effect as if
made on the Interest  Payment Date, date fixed for redemption,  or at the stated
maturity,  or on such last day for  conversion,  provided that no interest shall
accrue for the period from and after such interest  payment date, date fixed for
redemption or stated maturity, as the case may be.

                  Section 16.7 Benefits of Indenture.  Nothing in this Indenture
or in the Debentures, expressed or implied, shall give to any person, other than
the parties hereto, any paying agent, any  authenticating  agent, any conversion
agent, any Debenture registrar and their successors hereunder and the holders of
Debentures,  any benefit or any legal or equitable right,  remedy or claim under
this Indenture.

                  Section  16.8 Table of  Contents,  Headings  Etc. The table of
contents  and the titles and  headings  of the  articles  and  sections  of this
Indenture have been inserted for  convenience  of reference  only, are not to be
considered  a part  hereof,  and shall in no way modify or  restrict  any of the
terms or provisions hereof.

                  Section 16.9 Authenticating  Agent. The Trustee may appoint an
authenticating  agent that shall be  authorized to act on its behalf and subject
to its direction in the  authentication and delivery of Debentures in connection
with the original  issuance  thereof and  transfers  and exchanges of Debentures

                                       56

<PAGE>

hereunder,  including under Sections 2.4, 2.5, 2.6, 2.7 and 3.3, as fully to all
intents  and  purposes  as though the  authenticating  agent had been  expressly
authorized by this  Indenture  and those  Sections to  authenticate  and deliver
Debentures.  For all purposes of this Indenture, the authentication and delivery
of Debentures by the  authenticating  agent shall be deemed to be authentication
and  delivery  of  such  Debentures  "by  the  Trustee"  and  a  certificate  of
authentication  executed  on behalf of the  Trustee by an  authenticating  agent
shall be deemed to satisfy any  requirement  hereunder or in the  Debentures for
the Trustee's certificate of authentication.

                  Any  corporation  into which any  authenticating  agent may be
merged or converted  or with which it may be  consolidated,  or any  corporation
resulting   from  any  merger,   consolidation   or   conversion  to  which  any
authenticating  agent shall be a party,  or any  corporation  succeeding  to the
corporate trust business of any authenticating  agent, shall be the successor of
the  authenticating  agent  hereunder,  if such  successor  company is otherwise
eligible under this Section, without the execution or filing of any paper or any
further act on the part of the  parties  hereto or the  authenticating  agent or
such successor company.

                  Any  authenticating  agent  may at any time  resign  by giving
written notice of resignation to the Trustee and to the Company. The Trustee may
at any time terminate the agency of any  authenticating  agent by giving written
notice of  termination  to such  authenticating  agent and to the Company.  Upon
receiving such a notice of resignation or upon such a termination, or in case at
any time any authenticating agent shall cease to be eligible under this Section,
the Trustee shall promptly appoint a successor  authenticating  agent (which may
be the Trustee),  shall give written  notice of such  appointment to the Company
and shall mail notice of such  appointment  to all holders of  Debentures as the
names and addresses of such holders appear on the Debenture register.

                  The  Company  agrees to pay to the  authenticating  agent from
time to time reasonable compensation for its services.

                  The provisions of Sections 7.2, 7.3, 7.4, 8.3 and this Section
16.9 shall be applicable to any authenticating agent.

                  Section 16.10 Execution in Counterparts. This Indenture may be
executed in any number of counterparts,  each of which shall be an original, but
such counterparts shall together constitute but one and the same instrument.

                                       57

<PAGE>

                  Etablissement  Pour le  Placement  Prive  hereby  accepts  the
trusts in this  Indenture  declared and provided,  upon the terms and conditions
hereinabove set forth.

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Indenture  to be duly  signed and  attested,  all as of the date  first  written
above.

                          FIELDS AIRCRAFT SPARES, INC.



                          By: /s/ Peter Frohlich
                              ----------------------
                          Name:Peter Frohlich 
                          Title:Chairman 

Attest:

/s/ Lawrence J. Troyna 
- -----------------------



                          ETABLISSEMENT POUR LE PLACEMENT PRIVE,
                          as Trustee



                          By: /s/ Herbert R. Towning 
                             -----------------------
                          Name:Herbert R. Towning 
                          Title:

Attest:

/s/ Judith White 
- ------------------- 


                         VON GRAFFENREID AG, as Paying Agent



                         By: /s/
                            -------------------------
                         Name:
                         Title: Authorized Signatory 

Attest:

/s/ Herbert R. Towning 
- -----------------------


<PAGE>

                          EXHIBIT A - FORM OF DEBENTURE


                           [FORM OF FACE OF DEBENTURE]

No. B-
                                                             $-----------------
                                                             CUSIP

                          FIELDS AIRCRAFT SPARES, INC.

                8.5% Subordinated Redeemable Debentures Due 2000

         THE DEBENTURE  EVIDENCED  HEREBY HAS NOT BEEN REGISTERED UNDER THE U.S.
         SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR ANY STATE
         SECURITIES  LAWS,  AND MAY NOT BE  OFFERED  OR SOLD  WITHIN  THE UNITED
         STATES OR TO, OR FOR THE ACCOUNT OR BENEFIT OF, U.S.  PERSONS EXCEPT AS
         SET FORTH IN THE FOLLOWING SENTENCE.  BY ACQUISITION HEREOF, THE HOLDER
         (1) REPRESENTS  THAT (A) IT IS AN "ACCREDITED  INVESTOR" (AS DEFINED IN
         RULE 501(a) UNDER THE SECURITIES ACT)  ("ACCREDITED  INVESTOR") AND (B)
         IT IS NOT A U.S. PERSON AND IS ACQUIRING THE DEBENTURE EVIDENCED HEREBY
         IN AN  OFFSHORE  TRANSACTION;  (2)  AGREES  THAT IT WILL NOT  RESELL OR
         OTHERWISE  TRANSFER THE DEBENTURE  EVIDENCED HEREBY OR THE COMMON STOCK
         ISSUABLE UPON CONVERSION OF SUCH DEBENTURE EXCEPT (A) TO THE COMPANY OR
         ANY  SUBSIDIARY  THEREOF,  (B) TO A  QUALIFIED  INSTITUTIONAL  BUYER IN
         COMPLIANCE  WITH  RULE  144A  UNDER  THE  SECURITIES  ACT,  (C)  TO  AN
         ACCREDITED  INVESTOR  THAT,  PRIOR  TO  SUCH  TRANSFER,   FURNISHES  TO
         ETABLISSEMENT  POUR LE PLACEMENT  PRIVE,  AS TRUSTEE,  A SIGNED  LETTER
         CONTAINING  CERTAIN  REPRESENTATIONS  AND  AGREEMENTS  RELATING  TO THE
         RESTRICTIONS ON TRANSFER OF THE DEBENTURE EVIDENCED HEREBY (THE FORM OF
         WHICH LETTER CAN BE OBTAINED FROM SUCH TRUSTEE), (D) OUTSIDE THE UNITED
         STATES IN  COMPLIANCE  WITH RULE 903 OR RULE 904 OF  REGULATION S UNDER
         THE  SECURITIES  ACT, (E) PURSUANT TO THE EXEMPTION  FROM  REGISTRATION
         PROVIDED BY RULE 144 UNDER THE  SECURITIES  ACT (IF  AVAILABLE)  OR (F)
         PURSUANT TO A REGISTRATION  STATEMENT WHICH HAS BEEN DECLARED EFFECTIVE
         UNDER THE  SECURITIES  ACT; AND (3) AGREES THAT IT WILL DELIVER TO EACH
         PERSON   TO  WHOM   THE   DEBENTURE  EVIDENCED  HEREBY   IS TRANSFERRED
         A NOTICE  SUBSTANTIALLY TO THE  EFFECT OF  THIS  LEGEND. IN  CONNECTION
         WITH  ANY  TRANSFER  OF  THE  DEBENTURE  EVIDENCED HEREBY,  THE  HOLDER

                                       A-1

<PAGE>

         MUST  CHECK  THE  APPROPRIATE  BOX  SET  FORTH  ON  THE REVERSE  HEREOF
         RELATING   TO   THE   MANNER  OF   SUCH  TRANSFER   AND  SUBMIT    THIS
         CERTIFICATE TO ETABLISSEMENT  POUR LE PLACEMENT PRIVE, AS TRUSTEE.  THE
         HOLDER MUST, PRIOR TO SUCH TRANSFER,  FURNISH TO ETABLISSEMENT  POUR LE
         PLACEMENT  PRIVE, AS TRUSTEE,  SUCH  CERTIFICATIONS,  LEGAL OPINIONS OR
         OTHER INFORMATION AS THE COMPANY MAY REASONABLY REQUIRE TO CONFIRM THAT
         SUCH  TRANSFER IS BEING MADE  PURSUANT TO AN  EXEMPTION  FROM,  OR IN A
         TRANSACTION  NOT  SUBJECT  TO,  THE  REGISTRATION  REQUIREMENTS  OF THE
         SECURITIES  ACT.  AS USED  HEREIN,  THE TERMS  "OFFSHORE  TRANSACTION,"
         "UNITED  STATES" AND "U.S.  PERSON" HAVE THE MEANINGS  GIVEN TO THEM BY
         REGULATION S UNDER THE SECURITIES ACT.

                  FIELDS AIRCRAFT SPARES, INC., a corporation duly organized and
validly existing under the laws of the State of Utah (the "Company"), which term
includes any Successor  Company  under the Indenture  referred to on the reverse
hereof,     for    value     received     hereby     promises    to    pay    to
___________________________,   or  registered  assigns,  the  principal  sum  of
______________________________________  Dollars on September  30,  2000,  at the
Corporate  Trust Office of the  Trustee,  in such coin or currency of the United
States  of  America  as at the time of  payment  shall be legal  tender  for the
payment of public and private debts, and to pay interest, semi-annually on March
31 and September 30 of each year (each an "Interest  Payment Date"),  commencing
March 31, 1998, on said principal sum at said office or agency,  in like coin or
currency,  at the rate per annum specified in the title of this Debenture,  from
September 30, 1997 or the most recent Interest Payment Date, as the case may be,
next  preceding  the date of this  Debenture to which  interest has been paid or
duly provided for,  unless the date hereof is a date to which  interest has been
paid or duly  provided  for, in which case from the date of this  Debenture,  or
unless no interest  has been paid or duly  provided  for on the  Debentures,  in
which case from September 30, 1997, until payment of said principal sum has been
made or duly  provided for. The interest so payable on any March 31 or September
30 will be paid to the  person  in whose  name  this  Debenture  (or one or more
Predecessor  Debentures)  is  registered  at the close of business on the record
date,  which  shall be the March 15 or  September  15 (whether or not a Business
Day) next preceding such March 31 or September 30,  respectively;  provided that
any such interest not  punctually  paid or duly provided for shall be payable as
provided  in the  Indenture.  Interest  shall  be paid by  check  mailed  to the
registered  holder  at the  registered  address  of  such  person  unless  other
arrangements are made in accordance with the provisions of the Indenture.

                  Reference is made to the further  provisions of this Debenture
set forth on the  reverse  hereof,  including,  without  limitation,  provisions
giving  the  holder  of this  Debenture  the right to  convert  up to 30% of the
principal amount of this Debenture into Common Stock of the Company on the terms
and subject to the  limitations  referred  to on the reverse  hereof and as more
fully specified in the Indenture. Such further provisions shall for all purposes
have the same effect as though fully set forth at this place.

                                       A-2

<PAGE>

                  This Debenture shall not be valid or become obligatory for any
purpose until the certificate of authentication  hereon shall have been manually
signed by the  Trustee,  or a duly  authorized  authenticating  agent  under the
Indenture.

                  IN WITNESS  WHEREOF,  the Company has caused this Debenture to
be duly executed under its corporate seal.

                                       FIELDS AIRCRAFT SPARES, INC.


                                       By: __________________________________
                                            Name:
                                            Title:


Attest:

___________________________________
         Secretary



                                           CERTIFICATE OF AUTHENTICATION

Dated:

                  This is one of the  Debentures  described in the  within-named
Indenture.




                                    By: _______________________________________
                                                Authorized Signatory

                                       A-3

<PAGE>

                         [FORM OF REVERSE OF DEBENTURE]

                          FIELDS AIRCRAFT SPARES, INC.

                8.5% Subordinated Redeemable Debentures Due 2000

                  This Debenture is one of a duly authorized issue of Debentures
of the Company,  designated as its 8.5% Subordinated  Redeemable  Debentures Due
2000 (herein called the "Debentures"), limited to the aggregate principal amount
of  $10,000,000  all issued or to be issued  under and  pursuant to an Indenture
dated as of  September  30,  1997 (the  "Indenture"),  between  the  Company and
Etablissement  Pour le Placement  Prive,  as trustee (the  "Trustee"),  to which
Indenture and all indentures supplemental thereto reference is hereby made for a
complete description of the rights, limitations of rights,  obligations,  duties
and  immunities  thereunder  of the Trustee,  the Company and the holders of the
Debentures.  Each  Debenture is subject to, and  qualified by, all such terms as
set forth in the  Indenture  certain  of which are  summarized  hereon  and each
holder  of a  Debenture  is  referred  to the  corresponding  provisions  of the
Indenture  for a complete  statement of such terms.  To the extent that there is
any inconsistency between the summary provisions set forth in the Debentures and
the Indenture,  the provisions of the Indenture shall govern.  Capitalized terms
used but not defined in this Debenture shall have the meanings  ascribed to them
in the Indenture.

                  In case an Event of  Default,  as  defined  in the  Indenture,
shall have occurred and be continuing,  the principal of,  premium,  if any, and
accrued  interest on all Debentures may be declared,  and upon said  declaration
shall become, due and payable, in the manner, with the effect and subject to the
conditions provided in the Indenture.

                  The payment of principal of, premium,  if any, and interest on
the Debentures  will, to the extent set forth in the Indenture,  be subordinated
in right of payment to the prior payment in full of all Senior  Indebtedness (as
defined in the Indenture).  Upon any distribution to creditors of the Company in
a liquidation or dissolution of the Company or in a bankruptcy,  reorganization,
insolvency,  receivership  or similar  proceeding  related to the Company or its
property,  in an assignment  for the benefit of creditors or any  marshalling of
the Company's  assets and  liabilities,  the holders of all Senior  Indebtedness
will first be  entitled  to receive  payment  in full of all  amounts  due or to
become due  thereon  before the  holders of the  Debentures  will be entitled to
receive any payment in respect of the principal of, premium, if any, or interest
on the Debentures (except that holders of Debentures may receive securities that
are  subordinated  at least to the  same  extent  as the  Debentures  to  Senior
Indebtedness and any securities issued in exchange for Senior Indebtedness).

                  The Company  also may not make any payment  upon or in respect
of the Debentures  (except in such subordinated  securities) and may not acquire
from the Trustee or the holder of any Debenture for cash or property (other than
securities  subordinated to at least the same extent as the Debenture to (i) all
Senior  Indebtedness  and (ii) any  securities  issued in  exchange  for  Senior
Indebtedness)  until  all  Senior  Indebtedness  has been  paid in full if (a) a
default in the  payment of the  principal  of,  premium,  if any, or interest on

                                       A-4

<PAGE>

Senior  Indebtedness  occurs and is continuing  beyond any applicable  period of
grace or (b) any other default  occurs and is continuing  with respect to Senior
Indebtedness  that permits  holders of the Senior  Indebtedness as to which such
default relates to accelerate its maturity and the Trustee  receives a notice of
such default from the representative or representatives of holders of at least a
majority in principal amount of Senior  Indebtedness then outstanding.  Payments
on the  Debentures  may and shall be resumed upon the date on which such default
is cured or waived.

                  In the event that the Trustee  (or paying  agent if other than
the Trustee) or any holder of the  Debentures  receives any payment of principal
or  interest  with  respect  to the  Debentures  at a time when such  payment is
prohibited  under the  Indenture,  such  payment  shall be held in trust for the
benefit of, and immediately  shall be paid over and delivered to, the holders of
Senior  Indebtedness or their  representative as their respective  interests may
appear.  After all Senior  Indebtedness is paid in full and until the Debentures
are paid in full, the holders of the Debentures shall be subrogated (equally and
ratably  with all other  Indebtedness  pari  passu with the  Debentures)  to the
rights of holders of Senior Indebtedness to receive distributions  applicable to
Senior  Indebtedness to the extent that  distributions  otherwise payable to the
holders  of  the  Debentures   have  been  applied  to  the  payment  of  Senior
Indebtedness.

                  The Indenture contains  provisions  permitting the Company and
the  Trustee,  with the  consent of the  holders of not less than a majority  in
aggregate principal amount of the Debentures at the time outstanding,  evidenced
as in the Indenture  provided,  to execute  supplemental  indentures  adding any
provisions to or changing in any manner or eliminating  any of the provisions of
the  Indenture or of any  supplemental  indenture or modifying in any manner the
rights of the  holders of the  Debentures;  provided  that no such  supplemental
indenture  shall (i) extend the fixed maturity of any  Debenture,  or reduce the
rate or extend the time of payment of interest thereon,  or reduce the principal
amount  thereof or premium,  if any,  thereon,  or reduce any amount  payable on
redemption  thereof,  or impair or affect  the right of any  Debentureholder  to
institute  suit for the  payment  thereof,  or make  the  principal  thereof  or
interest or premium,  if any, thereon payable in any coin or currency other than
that provided in the Debentures, modify the subordination provisions in a manner
adverse to the  holders of the  Debentures,  or impair the right to convert  the
Debentures  into Common  Stock  subject to the terms set forth in the  Indenture
without the consent of the holder of each  Debenture  so affected or (ii) reduce
the  aforesaid  percentage of  Debentures,  the holders of which are required to
consent to any such supplemental  indenture,  without the consent of the holders
of all  Debentures  then  outstanding.  The Company and the Trustee may amend or
supplement  the  Indenture  without  notice  to or  consent  of  any  holder  of
Debentures in certain events specified in the Indenture.  It is also provided in
the Indenture that,  prior to any declaration  accelerating  the maturity of the
Debentures,  the  holders of a majority  in  aggregate  principal  amount of the
Debentures  at the time  outstanding  may on behalf of the holders of all of the
Debentures  waive any past default or Event of Default  under the  Indenture and
its  consequences  except a default in the payment of interest or any premium on
or the principal of any of the  Debentures,  a failure by the Company to convert
any  Debentures  into Common  Stock of the  Company,  unless  otherwise  excused
pursuant to the terms of the Indenture, or a default in respect of a covenant or
provision of the Indenture  that under  Article X thereof  cannot be modified or
amended without the consent of the holders of all Debentures  then  outstanding.

                                       A-5

<PAGE>

Any such consent or waiver by the holder of this  Debenture  (unless  revoked as
provided in the Indenture)  shall be conclusive and binding upon such holder and
upon all future holders and owners of this Debenture and any Debentures that may
be issued in exchange or substitution hereof, irrespective of whether or not any
notation thereof is made upon this Debenture or such other Debentures.

                  No reference  herein to the Indenture and no provision of this
Debenture  or of the  Indenture  shall  alter or impair  the  obligation  of the
Company,  which is absolute and  unconditional,  to pay the principal of and any
premium and interest on this Debenture at the place, at the respective times, at
the rate and in the coin or currency herein prescribed.

                  Interest on the Debentures shall be computed on the basis of a
360-day year composed of twelve 30-day months.

                  The Debentures are issuable in registered form without coupons
in denominations of $1,000 principal amount and integral multiples  thereof.  At
the office or agency of the Company  referred to on the face hereof,  and in the
manner and subject to the limitations provided in the Indenture, without payment
of any service  charge but with payment of a sum  sufficient to cover any tax or
other   governmental   charge  that  may  be  imposed  in  connection  with  any
registration  or exchange of Debentures,  Debentures may be exchanged for a like
aggregate principal amount of Debentures of other authorized denominations.

                  The Debentures are not redeemable at the option of the Company
prior to March 31, 1999. At any time on or after that date,  the  Debentures may
be redeemed at the Company's option,  upon notice as set forth in the Indenture,
in whole  at any time or in part  from  time to time,  at 100% of the  principal
amount,  together  with  accrued  interest  to the date  fixed  for  redemption;
provided that if the date fixed for  redemption is a date on or after the record
date and on or  before  the  next  following  Interest  Payment  Date,  then the
interest  payable on such date shall be paid to the holder of record on the next
preceding March 15 or September 15, respectively.

                  In the event the Company,  in a bulk sale  transaction,  sells
its entire  existing  inventory of spare parts  purchased from Douglas  Aircraft
Corporation  pursuant  to  contract  numbers  DAC  88-28-D,  DAC 91-03-P and DAC
91-04-P (the  "Inventory"),  the Company shall  deposit,  within 90 days of such
sale,  in an account  specified by the Trustee,  50% of the net proceeds of such
sale,  after  deducting  all  amounts  paid or payable  to any  lender  having a
security  interest in such Inventory,  and all costs,  expenses and taxes of the
Company,  incurred in any way in connection with the sale,  provided that 50% of
such net proceeds exceeds $300,000 (the "Minimum Proceeds").

                  The Company shall give written  notice to the Trustee and each
Debentureholder of the sale of Inventory resulting in the receipt by the Company
of  the  Minimum  Proceeds,   by  first-class  mail,  postage  prepaid,  at  the
Debentureholder's address appearing in the Debenture register, within 45 days of
the sale, stating, among other things, that (i) a sale of Inventory has occurred
and (ii) 50% of the  amount  of such net  proceeds  will be used to  redeem  the

                                       A-6

<PAGE>

Debentures  at 100% of their  principal  amount,  plus  accrued  interest to the
redemption  date,  on a  pro  rata  basis,  unless  at  least  66  2/3%  of  the
Debentureholders  consent, within 30 days of such notice to allow the Company to
retain the proceeds for working capital purposes.

                  Subject to the provisions of the Indenture,  the holder hereof
has the one-time right,  at its option,  at any time after 90 days following the
latest date of original  issuance  of the  Debentures  and prior to the close of
business on September 27, 2000,  subject to prior redemption or repurchase,  or,
as to all or any portion  hereof  called for  redemption,  prior to the close of
business  one  business  day before the date fixed for  redemption  (unless  the
Company shall default in payment due upon redemption thereof),  to convert up to
a  maximum  of 30%  (less  any  amounts  converted  pursuant  to  the  Mandatory
Conversion  described  below) of the  principal  hereof or any  portion  of such
principal that is $1,000 or an integral  multiple  thereof,  into that number of
fully paid and  non-assessable  shares of the Company's  Common  Stock,  as said
shares shall be constituted at the date of conversion,  obtained by dividing the
principal  amount of this  Debenture  or portion  thereof to be converted by the
conversion price (the "Conversion Price") equal to the greater of (i) 85% of the
average  closing price of the Company's  Common Stock during the  20-Trading Day
period  ending  on the  date  upon  which  the  holder  exercises  the  right of
conversion,  and (ii) $12.00 per share or such conversion price as adjusted from
time to time as provided in the  Indenture,  upon  surrender of this  Debenture,
together with a conversion  notice as provided in the Indenture,  to the Company
at the Corporate Trust Office of the Trustee, and, unless the shares issuable on
conversion  are to be issued in the same name as this  Debenture,  duly endorsed
by, or  accompanied  by  instruments  of  transfer in form  satisfactory  to the
Company duly executed by, the holder or by his duly authorized attorney.

                  In the event  that,  during  any  consecutive  20-Trading  Day
period,  the average  closing  price of the  Company's  Common  Stock  equals or
exceeds $12.00 per share, the Company may, within 30 days of such 20-Trading Day
period,  require  the  conversion  (the  "Mandatory  Conversion")  of  up  to an
aggregate of 20% of the principal amount of outstanding Debentures, pro rata, at
the  Conversion  Price.  The  Company  shall give notice to the Trustee and each
Debentureholder  within ten days of the  20-Trading  Day period of its intent to
convert a portion of the Debentures.

                  Except as described in the  Indenture,  no adjustment  will be
made on  conversion  of any  Debentures  for  interest  accrued  thereon  or for
dividends  paid on any Common Stock issued.  A Holder of Debentures at the close
of business on a record date will be entitled to receive the interest payable on
such Debentures on the corresponding interest payment date. However,  Debentures
surrendered  for  conversion  during the period  from the close of business on a
record date to the opening of business on the next succeeding  interest  payment
date  must be  accompanied  by  funds  equal  to the  interest  payable  on such
succeeding  interest payment date on the principal  amount so converted  (unless
such Debenture or portion  thereof being converted is called for redemption on a
redemption  date  during the period  from the close of  business on or after any
record  date  to the  close  of  business  on the  business  day  following  the
corresponding  interest  payment date).  The interest  payment with respect to a
Debenture  called for  redemption on a date between the close of business on any

                                       A-7

<PAGE>

record date for the payment of interest to the close of business on the business
day  following  the  corresponding  interest  payment date and  surrendered  for
conversion  during  that period  will be payable on the  corresponding  interest
payment  date to the  registered  Holder at the close of business on that record
date  (notwithstanding the conversion of such Debenture before the corresponding
interest payment date). A Holder of Debentures who elects to convert during that
period need not include  funds equal to the  interest  paid.  The Company is not
required  to  issue  fractional  shares  of  Common  Stock  upon  conversion  of
Debentures  and,  in lieu  thereof,  will pay a cash  adjustment  based upon the
conversion price.

                  Upon due  presentment  for  registration  of  transfer of this
Debenture  at the  Corporate  Trust Office of the  Trustee,  a new  Debenture or
Debentures of authorized  denominations for an equal aggregate  principal amount
will be issued to the transferee in exchange thereof,  subject to the conditions
and limitations provided in the Indenture,  without charge except for any tax or
other governmental charge imposed in connection therewith.

                  The Company, the Trustee, any authenticating agent, any paying
agent, any conversion  agent and any Debenture  registrar may deem and treat the
registered holder hereof as the absolute owner of this Debenture (whether or not
this Debenture shall be overdue and notwithstanding any notation of ownership or
other  writing  hereon made by anyone  other than the  Company or any  Debenture
registrar),  for the purpose of receiving  payment hereof, or on account hereof,
for the conversion  hereof and for all other  purposes,  and neither the Company
nor the Trustee nor any other  authenticating agent nor any paying agent nor any
other  conversion  agent nor any  Debenture  registrar  shall be affected by any
notice  to the  contrary.  All  payments  made  to or  upon  the  order  of such
registered  holder  shall,  to the extent of the sum or sums paid,  satisfy  and
discharge liability for monies payable on this Debenture.

                  No recourse for the payment of the principal of or any premium
or interest on this  Debenture,  or for any claim based  hereon or  otherwise in
respect  hereof,  and no  recourse  under or upon any  obligation,  covenant  or
agreement of the Company in the Indenture or any indenture  supplemental thereto
or in any Debenture, or because of the creation of any indebtedness  represented
thereby,  shall  be  had  against  any  incorporator,  shareholder,  officer  or
director,  as such, past,  present or future, of the Company or of any Successor
Company,  either  directly  or through  the  Company or any  Successor  Company,
whether  by  virtue  of  any  constitution,  statute  or  rule  of law or by the
enforcement of any assessment or penalty or otherwise, all such liability being,
by the acceptance  hereof and as part of the consideration for the issue hereof,
expressly waived and released.

                                       A-8

<PAGE>

                                  ABBREVIATIONS


                  The following  abbreviations,  when used in the inscription of
the face of this  Debenture,  shall be construed as though they were written out
in full according to applicable laws or regulations:

TEN COM -  as tenants in common                   UNIF GIFT MIN ACT -
TEN ENT -  as tenants by the entireties           __________________ Custodian 
JT TEN  -  as joint tenants with right of              (Cust) 
            survivorship and not as tenants       __________________ under
            in common                                  (Minor) 

                                                  Uniform Gifts to
                                                  Minors Act __________________
                                                                    (State)


                    Additional abbreviations may also be used
                          though not in the above list.

                                       A-9

<PAGE>

                           [FORM OF CONVERSION NOTICE]

                                CONVERSION NOTICE


To:      Fields Aircraft Spares, Inc.

                  The  undersigned  registered  owner of this  Debenture  hereby
irrevocably  exercises  the option to convert  this  Debenture,  or the  portion
hereof (which is $1,000 principal amount or an integral  multiple thereof) below
designated,  into  Common  Shares,  par value $.05 per share,  of the Company in
accordance with the terms of the Indenture  referred to in this  Debenture,  and
directs that the shares issuable and deliverable upon such conversion,  together
with any check in payment for fractional shares and any Debentures  representing
any  unconverted  principal  amount  hereof,  be  issued  and  delivered  to the
registered  holder hereof unless a different name has been indicated  below.  If
shares or any portion of this  Debenture  not  converted are to be issued in the
name of a person  other than the  undersigned,  the  undersigned  will check the
appropriate  box below and pay all transfer taxes payable with respect  thereto.
Any  amount  required  to be paid to the  undersigned  on  account  of  interest
accompanies this Debenture.


Dated:_______________________               Contact Person: ____________________
                                            Fax Number:_________________________
_____________________________               Telephone Number:___________________

- -----------------------------
Signature(s)




Signature(s)  must be guaranteed by an eligible  Guarantor  Institution  (banks,
stock brokers,  savings and loan associations and credit unions) with membership
in an approved signature  guarantee medallion program pursuant to Securities and
Exchange  Commission  Rule  17Ad-15  if  Common  Shares  are  to be  issued,  or
Debentures  to be  delivered,  other  than to and in the name of the  registered
holder.


_______________________________________
Signature Guarantee


                                      A-10

<PAGE>


Fill in for  registration  of shares if to be issued,  and  Debentures  if to be
delivered, other than to and in the name of the registered holder:


_________________________________________________________
(Name)

_________________________________________________________
(Street Address)

_________________________________________________________
(City, State and Zip Code)

Please print name and address


Principal amount to be converted (if less than all) $ ____



Social Security or  ________________________________

Other Taxpayer Identification Number

                                      A-11

<PAGE>

                              [FORM OF ASSIGNMENT]


                  For  value   received   _____________________________   hereby
sell(s), assign(s) and transfer(s) unto _________________________ (Please insert
social security or other  identifying  number of assignee) the within Debenture,
and hereby irrevocably constitutes and appoints ________________________________
attorney to transfer the said  Debenture on the books of the Company,  with full
power of substitution in the premises.

                  In connection with any transfer of the within  Debenture,  the
undersigned confirms that such Debenture is being transferred:

[_]      To Fields Aircraft Spares, Inc. or a subsidiary thereof; or

[_]      Pursuant to and  in compliance with Rule 144A under the  Securities Act
         of 1933, as amended; or

[_]      To an  accredited  investor  pursuant to  and  in compliance  with  the
         Securities Act of 1933, as amended; or

[_]      Pursuant to and in  compliance with  Regulation S under  the Securities
         Act of 1933, as amended; or

[_]      Pursuant to and in compliance with Rule 144 under the Securities Act of
         1933, as amended.

                  Unless one of the boxes  above is checked,  the  Trustee  will
refuse to register any of the within  Debentures in the name of any person other
than the registered  holder  thereof (or hereof);  provided,  however,  that the
Trustee may, in its sole discretion, register the transfer of such Debentures if
it has received such certifications,  legal opinions and/or other information as
the Company has reasonably requested to confirm that such transfer is being made
pursuant  to an  exemption  from,  or  in a  transaction  not  subject  to,  the
registration requirements of the Securities Act of 1933, as amended.

                  In addition,  if the transferee is an accredited investor or a
purchaser who is not a U.S.  person,  the holder must furnish to the Trustee (i)
in the case of an  accredited  investor,  a  signed  letter  containing  certain
representations  and agreements  relating to the restrictions on transfer of the
security  evidenced  hereby  in  substantially  the  form  of  Exhibit  B to the
Indenture  and  (ii)  such  other   certifications,   legal  opinions  or  other
information as it may reasonably  require to confirm that such transfer is being
made  pursuant to an exemption  from,  or in a  transaction  not subject to, the
registration requirements of the Securities Act of 1933, as amended.

                                      A-12

<PAGE>

Dated: _______________________

______________________________

______________________________
Signature(s)

Signature(s)  must be guaranteed by an eligible  Guarantor  Institution  (banks,
stock brokers,  savings and loan associations and credit unions) with membership
in an approved signature  guarantee medallion program pursuant to Securities and
Exchange Commission Rule 17Ad-15.



_________________________________
Signature Guarantee

NOTICE: The signature on the conversion notice or the assignment must correspond
with the name as  written  upon the face of the  Debenture  in every  particular
without alteration or enlargement or any change whatever.

                                      A-13

<PAGE>

            EXHIBIT B - FORM OF TRANSFEREE CERTIFICATE FOR DEBENTURES
                      TO BE ISSUED TO ACCREDITED INVESTORS



Etablissement Pour le Placement Prive
as Trustee
Gartenstrasse 10
CH-8002
Zurich, Switzerland
Attention:  Corporate Trust Administration

                  Re:      Fields Aircraft Spares, Inc.
                           8.5% Subordinated Redeemable
                           Debentures Due 2000 (the "Debentures")

                  Reference  is  hereby  made  to  the  Indenture  dated  as  of
September 30, 1997 (as supplemented from time to time, the "Indenture")  between
Fields  Aircraft  Spares,  Inc. and  Etablissement  Pour le Placement  Prive, as
Trustee.  Capitalized  terms used but not defined herein shall have the meanings
given to them in the Indenture.

                  The  undersigned is delivering  this letter in connection with
the transfer of Debentures to the  undersigned,  which Debentures are to be held
by the undersigned in definitive registered form.

                  The undersigned hereby confirms that:

                  (i) the  undersigned  is an "accredited  investor"  within the
meaning  of Rule  501(a)  under the  Securities  Act of 1933,  as  amended  (the
"Securities Act"), or an entity in which all of the equity owners are accredited
investors  within  the  meaning  of Rule  501(a)  under the  Securities  Act (an
"Accredited Investor");

                  (ii) (A) any purchase of Debentures by the undersigned will be
for the  undersigned's  own  account  or for the  account  of one or more  other
Accredited Investors or as fiduciary for the account of one or more trusts, each
of which is an "accredited  investor" within the meaning of Rule 501(a)(7) under
the Securities Act and for each of which we exercise sole investment  discretion
or (B) we are a "bank," within the meaning of Section  3(a)(2) of the Securities
Act, or a "savings  and loan  association"  or other  institution  described  in
Section  3(a)(5)(A)  of the  Securities  Act  that is  acquiring  Debentures  as
fiduciary for the account of one or more institutions for which we exercise sole
investment discretion;

                  (iii) the  undersigned  has such  knowledge and  experience in
financial and business matters that the undersigned is capable of evaluating the
merits and risks of purchasing Debentures;

                                       B-1

<PAGE>

                  (iv) the  undersigned is not acquiring  Debentures with a view
to  distribution  thereof or with any present  intention  of offering or selling
Debentures  or the Common Stock  issuable  upon  conversion  thereof,  except as
permitted below; provided that the disposition of the undersigned's property and
property of any accounts for which the  undersigned is acting as fiduciary shall
remain at all times within the undersigned's control; and

                  (v) the  undersigned  acknowledges  that it has had  access to
such  financial and other  information  as the  undersigned  deems  necessary in
connection with the undersigned's decision to purchase Debentures.

                  The  undersigned  understands  that the  Debentures  have been
issued in a  transaction  not involving  any public  offering  within the United
States within the meaning of the  Securities Act and that the Debentures and the
shares of Common Stock  issuable  upon  conversion  thereof  (collectively,  the
"Securities")  have  not  been  registered  under  the  Securities  Act  or  any
applicable  state  securities   laws,  and  the  undersigned   agrees,   on  the
undersigned's own behalf and on behalf of each account for which the undersigned
acquires any Securities, that if in the future the undersigned decides to resell
or  otherwise  transfer  such  Securities,  such  Securities  may be  resold  or
otherwise  transferred only (a) to the Company or any subsidiary thereof, (b) to
a person who is a "qualified institutional buyer" (as defined in Rule 144A under
the Securities Act) in a transaction  meeting the requirements of Rule 144A, (c)
to an Accredited Investor that, prior to such transfer, furnishes to the trustee
(or transfer  agent,  as the case may be) for such  Securities  a signed  letter
containing certain  representations  and agreements relating to the restrictions
on transfer of such  Securities  (the form of which letter can be obtained  from
such  trustee,  or transfer  agent,  as the case may be), (d) outside the United
States in a  transaction  meeting the  requirements  of  Regulation  S under the
Securities Act, (e) pursuant to the exemption from registration provided by Rule
144 under the Securities  Act (if  applicable) or (f) pursuant to a registration
statement  which has been  declared  effective  under the  Securities  Act.  The
undersigned  agrees  that any such  transfer of  Securities  referred to in this
paragraph shall be in accordance with applicable securities laws of any State of
the United States or any other  applicable  jurisdiction  and in accordance with
the legends  set forth on the  Securities.  The  undersigned  further  agrees to
provide any person  purchasing  any of the  Securities  from the  undersigned  a
notice advising such purchaser that resales of such Securities are restricted as
stated herein. The undersigned understands that the registrar and transfer agent
for the Securities  will not be required to accept for  registration or transfer
any Securities, except upon presentation of evidence satisfactory to the Company
that the  foregoing  restrictions  on  transfer  have been  complied  with.  The
undersigned  further  understands  that  any  Securities  will be in the form of
definitive  physical  certificates and that such certificates will bear a legend
(unless the sale of the Securities has been registered under the Securities Act)
reflecting the substance of this paragraph.

                  The undersigned  acknowledges that the Transferor,  others and
you  will  rely  upon  the  undersigned's   confirmation,   acknowledgments  and
agreements set forth herein,  and the undersigned  agrees to notify you promptly
in writing if any of the  undersigned's  representations  or  warranties  herein
ceases to be accurate and complete.

                                       B-2

<PAGE>

Dated:  __________, ____


                                          -------------------------------------
                                                    (Name of Transferor)


                                          By:_________________________________
                                              Name:
                                              Title:
                                              Address:

                                       B-3



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