ATLANTIC COAST AIRLINES INC
10-K/A, 1998-03-31
AIR TRANSPORTATION, SCHEDULED
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                                             March 30, 1998    

Securities and Exchange Commission 
Washington, DC 20549

To whom it may concern:

We file this amendment to the 1997 Form 10-K for the following reasons:

1) To correct several editing and formatting errors noted in the initial 
   submission accepted on March 25, 1998.

2) To include all exhibits not previously filed or incorporated by reference in
   initial submission accepted on March 25, 1998.

Thank-you for your attention to this matter.

                                             Sincerely,



                                             David W. Asai
                                             Vice President, Financial Planning
                                             and Controller

        



                     SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, DC 20549

                                FORM 10-K

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

For the fiscal year ended December 31, 1997

Commission file number 0-21976

                         ATLANTIC COAST AIRLINES, INC.
          (Exact name of registrant as specified in its charter)
                                                         
Delaware                                        13-3621051
(State of incorporation)                       (IRS Employer
                                               Identification No.)

515-A Shaw Road, Dulles, Virginia               20166    
(Address of principal executive offices)      (Zip Code)

Registrant's telephone number, including area code:  (703) 925-6000

Securities registered pursuant to Section 12(b) of the Act:

Common Stock par value $ .02                NASDAQ National Market
    (Title of Class)             (Name of each exchange on which registered)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by  Section  13 or 15(d) of the  Securities  Act of 1934  during the
preceding 12 months (or for such shorter period that the registrant was required
to file such reports),  and (2) has been subject to such filing requirements for
the past 90 days.
                                       Yes   X                       No__

Indicate by check mark if  disclosure  of  delinquent  filers  pursuant to Item 
405 of  Regulation  S-K is not contained herein,  and  will  not be  contained, 
to the best of  registrant's  knowledge,  in  definitive  proxy  or  information
statements incorporated by reference in Part III of this Form 10-K or any 
amendment to this Form 10-K.   

The  aggregate  market  value  of  voting  stock  held by  nonaffiliates  of the
registrant as of March 2, 1998 was approximately $253,399,036.

As of March 2, 1998 there were 9,107,786 shares of Common  Stock of the  
registrant  issued  and  7,635,286  shares of Common Stock were outstanding.

                   Documents Incorporated by Reference

Certain  portions  of the  documents  listed  below  have been  incorporated  by
reference into the indicated part of this Form 10-K.

Document Incorporated                                      Part of Form 10-K
- ---------------------                                      -----------------
Proxy Statement for 1998 Annual Meeting of Shareholders   Part III, Items 10-13








                                                         PART I

Item 1.           Business

         General

                  This  Annual  Report  on Form  10-K  contains  forward-looking
statements,   particularly   those  statements   identified  by  such  words  as
"anticipates", "believes", "plans" or "expects". Actual results may differ based
on a variety of factors including costs,  competitive reactions, and marketplace
demand for services on the Company's routes.

                  Atlantic Coast Airlines, Inc. ("ACAI"), is the holding company
of Atlantic Coast Airlines ("ACA"),  (together, the "Company"), a large regional
airline, serving 44 destinations in 19 states in the Eastern United States as of
March 2, 1998 with  nearly 500  scheduled  non-stop  flights  system-wide  every
weekday.  The  Company  markets  itself  as  "United  Express"  and is the  only
code-sharing regional airline for United Airlines,  Inc. ("United") operating as
United  Express in the Eastern United  States.  The Company caters  primarily to
business   travelers   with  its  principle   operations  at   Washington-Dulles
International Airport ("Washington-Dulles"),  which serves the Northern Virginia
and Washington, D.C. markets. The Company coordinates its schedules with United,
particularly at Washington-Dulles,  where United operates 63 daily departures to
31 cities in the U.S.,  Europe  and  Mexico.  As of March 2, 1998,  the  Company
operated a fleet of 67 aircraft (six  regional  jets and 61 turboprop  aircraft)
having an average age of approximately five years.

         Summary of Company Strategy

                  The  Company's  long-term  corporate  objective  is to achieve
sustained earnings growth by focusing its resources in the following areas:

                  1.  Implementation  of the Regional Jet Fleet and Expansion of
the  Washington-Dulles  Hub: In the fourth  quarter of 1997,  the Company placed
into service its first five 50-seat Canadair Regional Jets ("CRJs"). One CRJ was
delivered in January 1998 with eight  additional  CRJs scheduled for delivery in
the  remainder of the year and nine in 1999.  The Company has options to acquire
25 additional CRJs.

                  The Company  anticipates  that it will utilize CRJs as part of
its  strategy  to grow at  Washington-Dulles  airport  by  reclaiming  passenger
traffic lost when United downsized its  Washington-Dulles  schedule in the early
1990's  and by  increasing  market  share,  principally  in  markets  beyond the
economic  operating range of its turboprop  aircraft.  The Company believes that
utilizing CRJs in this manner will provide additional  connecting  passengers to
both its turboprop  fleet and United's jets flying from  Washington-Dulles.  The
Company also  believes  that the CRJs could also be deployed as a complement  to
its existing turboprop service in the short-haul, high-density markets and could
provide additional capacity during peak business travel times.

                  In December 1997, the Company  petitioned the U.S.  Department
of  Transportation  ("DOT") for 42  arrival/departure  slots at Chicago's O'Hare
Airport to serve seven cities currently  without nonstop service to Chicago.  If
granted,  the  Company  would  utilize as many as six CRJs  operating  as United
Express  pursuant to agreements  with United  Airlines (see  discussion on slots
below).

                  2.  Capitalize  on and Promote  the  Company's  Identity  with
United  Airlines:   The  Company  intends  to  capitalize  on  and  promote  its
code-sharing  relationship with United,  which has contributed  significantly to
the  Company's  growth.  The Company has a shared  market  identity with United,
lists its flights under  United's two letter flight  designator  code in airline
Computer  Reservation  Systems ("CRSs") and other published schedules and awards
United's  "Mileage  Plus" frequent  flyer miles to its  passengers.  The Company
coordinates its schedules with United,  particularly at  Washington-Dulles,  and
participates with United in cooperative advertising and marketing agreements. In
most cities served by the Company,  United  provides all airport  facilities and
related  ground  support  services.  The Company also  participates  in United's
"Apollo" reservation system and all major CRSs, uses the United Express logo and
has exterior aircraft paint schemes similar to those of United.

                  The  Company  markets  itself as  "United  Express"  under its
United Express Agreements ("Agreements") with United Airlines. These Agreements,
originally  scheduled  to expire on March 31, 1998,  have been  extended for one
year.

                  3. Continue to Emphasize  Operational  Safety and  Efficiency:
For  over  three  years,  the  Company  has  worked  with the  Federal  Aviation
Administration   ("FAA")  to  develop   enhanced   pilot  training  and  cockpit
decision-making  procedures  under  two  programs:  the  Advanced  Qualification
Program ("AQP") and the Advanced Crew Resource Management Program ("ACRM").  AQP
and ACRM focus  training  curriculums  on individual  technical  skills and crew
interaction scenarios. The FAA selected the Company to participate in a grant to
study how ACRM can be integrated  with standard  operational  procedures such as
crew briefings and checklists.  The Company anticipates that it will continue to
enhance and improve these programs in cooperation with the FAA.

                  The  Company  is  also in the  process  of  installing  in its
aircraft  an  enhanced   navigational  aid  which  utilizes  global  positioning
satellite ("GPS") technology. Once implemented, the Company anticipates that GPS
will reduce both aircraft block hours and pilot workloads. On July 18, 1997, the
FAA approved the Company's use of GPS on certain routes.  Full implementation of
GPS is contingent  on FAA approval for use in all of the  Company's  operational
areas.

                  During 1997, the Company equipped most of its aircraft with an
automated  aircraft  time  reporting  system,  which enables the Company to more
efficiently  communicate  with  flight  crews and  further  automate  the flight
tracking process. In addition,  this system improves the timeliness and accuracy
of flight information communicated and displayed to the Company's passengers.

                  During 1997, the Company performed most aircraft overnight and
heavy-maintenance  checks in Lynchburg,  Virginia,  approximately 160 miles from
Washington-Dulles.  In February 1998, the Company  occupied its new  maintenance
hangar at  Washington-Dulles.  Moving its  maintenance  operation  to the larger
facility at Washington-Dulles accommodates the Company's expanding fleet and has
enabled the Company to eliminate  aircraft ferrying costs. In addition,  because
the new facility  increases the proximity of maintenance  technicians  and spare
parts, the Company believes it will improve completion factor by reducing flight
cancellations (see discussion on leased facilities below).

         Markets

                  As of  March 2,  1998,  the  Company  scheduled  218  non-stop
flights from Washington-Dulles  representing more flights from that airport than
any other  airline.  During  1997,  the  Company  accounted  for more  passenger
boardings  from  Washington-Dulles  than any  airline  other than  United.  On a
combined basis, the Company and United generated  approximately 55% of passenger
traffic at Washington-Dulles during 1997.

                  The Company's top four cities based on frequency of operations
are Washington-Dulles, Boston, New York-JFK and Newark. During 1997, the Company
added additional flights to existing Washington-Dulles markets, added new routes
from  the  Washington-Dulles,  Boston  and  New  York-JFK  airports  and  ceased
operations  in  one  market.  The  Company  increased   operations  in  existing
Washington-Dulles  markets by 23 daily departures and added new service to three
cities:  Fort Myers,  FL;  Jacksonville,  FL; and Nashville,  TN.  Further,  the
Company added new non-Dulles  flights from Boston,  consisting of one new market
with five daily  departures;  and New  York-JFK  with two new  markets and eight
daily  departures.  In 1997,  the Company  ceased  operations to New Haven,  CT,
resulting in the elimination of four daily departures from Washington-Dulles. In
1997,  the Company  also  provided  seasonal  service to Martha's  Vineyard  and
Nantucket, MA from Washington-Dulles.

                  The  following  table  sets forth the  destinations  currently
served (or  scheduled for service on the date  indicated) by the Company,  as of
March 2, 1998:

           Albany, NY                                   Manchester, NH
           Allentown, PA                                Nashville, TN
           Atlanta, GA                                  New York, NY (Kennedy)
           Baltimore, MD                                New York, NY (LaGuardia)
           Binghamton, NY                               Newark, NJ
           Boston, MA                                   Newport News, VA
           Buffalo, NY                                  Norfolk, VA
           Burlington, VT                               Philadelphia, PA
           Charleston, SC                               Pittsburgh, PA
           Charleston, WV                               Portland, ME
           Charlottesville, VA                          Providence, RI
           Cleveland, OH                                Raleigh-Durham, NC    
           Columbus, OH                                 Richmond, VA
           Dayton, OH                                   Roanoke, VA        
           Detroit, MI                                  Rochester, NY
           Fort Myers, FL                               Savannah, GA (4/1/98)
           Greensboro, NC                               State College, PA
           Harrisburg, PA                               Stewart, NY
           Hartford, CT                                 Syracuse, NY
           Indianapolis, IN (3/16/98)                   Tampa, FL
           Jacksonville, FL                             Westchester County, NY
           Knoxville, TN                                Washington-Dulles, VA
           Lynchburg, VA                                Wilmington, NC
                                                        Worcester, MA (4/16/98)

         Fleet Description

                  Fleet  Expansion:  As of March 2, 1998, the Company operated a
fleet of six CRJs and 61 turboprop aircraft,  consisting of 29 British Aerospace
Jetstream-32 ("J-32s") and 32 British Aerospace Jetstream-41 ("J-41").

                  As of March 4,  1998,  the  Company  had a total of 17 CRJs on
order from Bombardier,  Inc., in addition to the six delivered, and held options
for 25 additional  CRJs. The initial order for 12 CRJs and 36 options was placed
on January  28,  1997.  Options  were  exercised  on  November  20,  1997 for an
additional six firm and six conditional  CRJ deliveries.  On March 4, 1998, five
of the six  conditional  orders were  converted to firm orders and the remaining
one was  restored to option  status.  The first six CRJs were  delivered  in the
third and fourth quarters of 1997, and January 1998. Eight additional deliveries
are scheduled in 1998 and nine deliveries are scheduled in 1999.

                  The Company  accepted  delivery  of four new J-41s  during the
first half of 1997,  and had  additional  J-41s on order  pursuant to a purchase
agreement  with  British  Aerospace,  dated  February  23,  1997,  the ("BA J-41
Agreement").  On May 29,  1997,  British  Aerospace  announced  that it would no
longer  manufacture  the J-41 as part of its regular  product  line.  On July 2,
1997, the Company and British  Aerospace amended the BA J-41 Agreement to cancel
any further  deliveries  pursuant to this  agreement.  On December 4, 1997,  the
Company  entered into a short term lease  agreement  and took  delivery of a new
J-41.

                  Fleet  Composition:  The  following  table  describes  the  
Company's  fleet  of  aircraft,  scheduled deliveries and options as of March 4,
1998:

<TABLE>
<CAPTION>
                                                                                                  Future Scheduled
                                 Number of Aircraft   Passenger Capacity     Average Age in         Deliveries/
                                                                                  Years               Options
<S>                                      <C>                  <C>             <C>                 <C>    

British Aerospace J-32                   29                   19                   8.2                   -
British Aerospace J-41                   32                   29                   3.2                   -
Canadair Regional Jets                    6                   50                    .4                 17/25
                                         --                                         --                 -----
                                         67                                        5.1                 17/25
                                         ==                                                            =====

</TABLE>

         Regional Jet Implementation

                  During  the third  quarter  of 1997 the  Company  successfully
completed  line  certification  of the Regional  Jet.  Accordingly,  the Company
received  authorization  to conduct  operations  under the provisions of the FAA
Part 121  regulations.  The  Company  is  operating  the CRJs under the same FAA
regulatory  requirements  mandated by the FAA for all other CRJ, and larger jet,
carriers.   The  Company   believes  that  the  market  will  support   existing
high-density  routes and new routes and schedules  that the  Company's  expanded
fleet will facilitate.  In addition, the Company expects that its customers will
find the new CRJs acceptable for relatively  longer flights,  thereby  enhancing
the Company's ability to compete in a broader geographic market.

                  The United Express  Agreements  required the Company to obtain
United's  consent to operate the 50-seat  CRJs under the "United  Express"  name
which  consent was  obtained on November 22,  1997.  All CRJ routes  operated as
United  Express must receive  prior  approval  from United.  While the Company's
request for that consent was pending,  United agreed in August 1997 to reimburse
the Company for its estimated aircraft lease and associated flight crew expenses
for its CRJs that were  delivered  but not in  operation  during the period from
September 11, 1997 through  December 31, 1997. On November 22, 1997, the Company
began  scheduled  CRJ  passenger  service to four  cities.  From  November 22 to
December 7, 1997, in order to expedite the  introduction  of United  Express CRJ
service,  United  agreed to  reimburse  the  Company  for the block  hour  costs
associated with providing CRJ service to three of these cities.  United received
the revenue from these  flights.  The United  subsidy  associated  with aircraft
lease and flight crew expenses also ceased after December 7, 1997.

         United Express Agreements

                  The Company's  code-sharing and related agreements with United
(the "United Express Agreements") define the Company's relationship with United.
The United Express Agreements  authorize the Company to use United's "UA" flight
designator  code to identify its flights and fares in the major CRSs,  including
United's  "Apollo"  reservation  system,  to use the  United  Express  logo  and
exterior aircraft paint schemes and uniforms similar to those of United,  and to
otherwise advertise and market its association with United.

                  Company  passengers may participate in United's "Mileage Plus"
frequent  flyer program and are eligible to receive a certain  minimum number of
United  frequent  flyer miles for each of the  Company's  flights.  Mileage Plus
members are also eligible to redeem their awards on the Company's  route system.
In 1997,  approximately 60% of the Company's passengers participated in United's
"Mileage Plus" frequent flyer program. The Company limits the number of "Mileage
Plus"   tickets  that  may  be  used  on  its  flights  and  believes  that  the
displacement, if any, of revenue passengers is minimal.

                  The United  Express  Agreements  also provide for  coordinated
schedules and  through-fares.  A  through-fare  is a fare offered by a major air
carrier  to  prospective   passengers  who,  in  order  to  reach  a  particular
destination,  transfer between the major carrier and its  code-sharing  partner.
Generally,  these fares are less  expensive than  purchasing the  combination of
local  fares.  United  establishes  all  through-fares  and allows the Company a
portion  of these  fares on a fixed rate or formula  basis  subject to  periodic
adjustment.  The United Express  Agreements  also provide for interline  baggage
handling,  and for  reduced  airline  fares  for  eligible  United  and  Company
personnel and families.  The United Express  code-sharing  agreement  expires on
March 31, 1999.

                  Under the United Express Agreements,  United provides a number
of additional  services to the Company.  These include publication of the fares,
rules  and  related  information  that are part of the  Company's  contracts  of
carriage  for  passengers  and  freight;  publication  of the  Company's  flight
schedules and related information; provision of toll-free reservations services;
provision  of ground  support  services at many of the  airports  served by both
United and the  Company;  provision  of ticket  handling  services  at  United's
ticketing  locations;  provision of airport  signage at airports  where both the
Company  and  United  operate;  provision  of United  ticket  stock and  related
documents;  provision  of expense  vouchers,  checks and cash  disbursements  to
Company  passengers  inconvenienced  by  flight  cancellations,  diversions  and
delays;  and  cooperation  in the  development  and  execution  of  advertising,
promotion,  and marketing  efforts featuring United Express and the relationship
between United and the Company.  In return for these services,  the Company pays
United monthly fees based on the total number of revenue  passengers  boarded by
the Company on its flights for the month.  The fee escalates  periodically  over
the term of the United Express Agreements.

                  The United  Express  Agreements  require the Company to obtain
United's consent to operate service between city pairs as "United  Express".  If
the Company  experiences  net operating  expenses that exceed revenues for three
consecutive  months on any required  route,  the Company may withdraw  from that
route if United and the Company are unable to negotiate an alternative  mutually
acceptable level of service for that route.  The United Express  Agreements also
require  the  Company to obtain  United's  approval  if it chooses to enter into
code-sharing  arrangements with other carriers,  but do not prohibit United from
competing,  or from  entering  into  agreements  with other  airlines  who would
compete,  on routes served by the Company.  The United Express Agreements may be
canceled if the Company  fails to meet certain  financial  tests or  performance
standards or fails to maintain certain minimum flight frequency  levels,  events
which the Company, based on experience to date, believes to be unlikely.

                  The United  Express  Agreements  restrict  the  ability of the
Company to merge with another  company or dispose of certain  assets or aircraft
without  offering United a right of first refusal to acquire the Company or such
assets or  aircraft.  United also has a right of first  refusal  with respect to
issuance  by the  Company of shares of its  Common  Stock if, as a result of the
issuance,  certain of the Company's stockholders and their permitted transferees
do not own at least 50% of the  Company's  Common  Stock  after  such  issuance.
Because  those  Company   stockholders  and  their  permitted   transferees  own
substantially  less than 50%  today,  management  believes  that such a right is
unlikely to be exercised.

         Lufthansa Agreement

                  In October  1997,  the  Company  entered  into a  code-sharing
agreement with Lufthansa German Airlines,  which permits  Lufthansa to place its
airline  code on  flights  operated  by the  Company.  In  addition,  the United
Express-Lufthansa  agreement  provides a wide range of benefits  for  code-share
passengers  including  the ability to check in once at their  initial  departure
city and receive  boarding  passes and seat  assignments for the flights on both
carriers  while their luggage is  automatically  checked  through to their final
destination.  Members  of the  Lufthansa  Miles & More  frequent  flyer  program
receive mileage credit for these flights. In January 1998, the Company added the
Lufthansa code to flights operated in ten city pair markets.

                  The following markets served by the Company now carry both the
United  Airlines (UA) and Lufthansa (LH) designator  codes on selected  flights:
Washington-Dulles  to  Greensboro,  NC;  Charlottesville,   VA;  Cleveland,  OH;
Norfolk,  VA;  Richmond,  VA;  Roanoke,  VA;  Syracuse,  NY;  Newport News,  VA;
Pittsburgh, PA; and Raleigh-Durham, NC.

         Fuel

                  The  Company  has  not  experienced   difficulties  with  fuel
availability  and  expects  to be able to obtain  fuel at  prevailing  prices in
quantities sufficient to meet its future requirements.  During 1997, the Company
purchased  approximately  78% of its fuel from United Aviation Fuels Corporation
("UAFC"), an affiliate of United taking advantage of the affiliate's significant
buying  power and fuel  purchasing  expertise.  On March 17,  1997,  the Company
renewed its fuel purchasing  agreement with the United  affiliate and obtained a
reduction in the base price of fuel at its Washington-Dulles hub. In January and
March 1998, the Company  entered into fixed price fuel purchase  agreements with
UAFC for the  delivery  of 33,000  barrels per month at  Washington-Dulles.  The
purchase contracts,  representing approximately 46% of the Company's anticipated
1998 fuel requirements, expire December 31, 1998.

         Marketing

                  The Company's  advertising and promotional  programs emphasize
the  Company's  close  affiliation  with United,  including  coordinated  flight
schedules and the ability of the Company's passengers to participate in United's
"Mileage  Plus"  frequent  flyer  program.  The Company's  services are marketed
primarily  by  means  of  listings  in CRSs  and the  Official  Airlines  Guide,
advertising and promotions,  and through direct contact with travel agencies and
corporate   travel   departments.   For  the  year  ended   December  31,  1997,
approximately  82% of the  Company's  passenger  revenue was derived from ticket
sales generated  through travel agencies and corporate  travel  departments.  In
marketing to travel agents,  the Company relies on personal  contacts and direct
mail campaigns,  provides familiarization flights, and hosts group presentations
and other functions to acquaint travel agents with the Company's services.  Many
of  these   activities  are  conducted  in  cooperation  with  United  marketing
representatives.  In addition,  the Company and United  jointly create radio and
print advertising in markets served by the Company.

                  In February  1998,  the Company  announced that it would offer
double Mileage Plus miles to passengers on several  United Express  regional jet
markets from February 1 to April 15, 1998. Those flights include service between
Washington-Dulles  International Airport and Fort Myers, Jacksonville and Tampa,
FL; as well as Atlanta, GA; Nashville, TN; and Raleigh-Durham, NC.

                  In  September  1995,  the  Company  became  a  participant  in
United's electronic  ticketing program.  This program allows customers to travel
on flights of United and the Company  without the need for a paper  ticket.  The
primary  benefit of this  program  is  improved  customer  service  and  reduced
ticketing  costs.  For the year ended December 31, 1997,  25.6% of the Company's
passengers utilized electronic tickets up from 18.4% for the year ended December
31, 1996.

         Competition

                  The Company  competes  primarily  with  regional and major air
carriers as well as with ground  transportation.  The Company's competition from
other air  carriers  varies from  location to location,  type of aircraft  (both
turbo-prop and jet), and in certain cities,  comes from carriers which serve the
same  destinations  as the  Company  but  through  different  hubs.  The Company
believes that its ability to compete in its market areas is  strengthened by its
code-sharing  relationship  with  United,  which has a  substantial  presence at
Washington-Dulles,   thereby   enhancing  the  importance  of  the  "UA"  flight
designator  code on the East  Coast.  The  Company  seeks to compete  with other
airlines by offering frequent flights.  In addition,  the Company's  competitive
position  benefits from the large number of  participants  in United's  "Mileage
Plus"  frequent flyer program who fly regularly to or from the markets served by
the Company.

                  At its Washington-Dulles hub, the Company faces limited direct
nonstop  competition from other carriers.  In eleven of its markets from Dulles,
other airlines have competing  turboprop and/or jet service.  There are no other
airlines  serving the  Company's  remaining  twenty-seven  Dulles  markets  with
nonstop   flights.   However,   flights  to  the   Company's   Washington-Dulles
destinations  are also offered by other  carriers from Ronald Reagan  Washington
National and Baltimore-Washington International airports.

                  During  1997,  the Company  continued  to see a trend toward a
lower percentage of its passengers connecting to United Airlines flights through
its Dulles hub. One potential  cause for this trend was  additional  competition
for connecting  passengers  from other hub networks in the region  controlled by
some of United's principal competitors.  In 1997, regional jet operations were a
much larger part of these  competing  hub networks.  As a result,  the Company's
turbo-prop  to  jet   connections   with  its  code-share   partner  United  are
increasingly  competing  with these other hub networks' jet to jet  connections.
Some  passengers  may perceive jet to jet  connections  more  favorably due to a
jet's shorter elapsed flight time and comfort relative to a turbo-prop aircraft.
The Company  believes  that the public's  favorable  perception of regional jets
supports its strategy for  acquisition of these aircraft to mitigate any loss of
passengers to operators already using regional jets.

                  The  Aviation  Deregulation  Act  of  1978  (the  "1978  Act")
eliminated many regulatory  constraints on airline competition,  thereby freeing
airlines to set prices and,  with  limited  exceptions,  to  establish  domestic
routes  without  the  necessity  of seeking  government  approval.  The  airline
industry  is highly  competitive,  and there  are few  barriers  to entry in the
Company's  markets.  Furthermore,  larger  carriers  with greater  resources can
impact the Company's markets through fare adjustments as well as flight schedule
modifications.

         Yield Management

                  The Company  closely  monitors  its  inventory  and pricing of
available seats by use of a computerized yield management system. In March 1997,
the Company  implemented a state-of-the-art  revenue management system, PROS IV,
marketed by PROS Strategic Solutions.  This system enables the Company's revenue
control  analysts,  on a flight  by  flight  basis,  to  establish  the  optimal
allocation  of seats by fare class (the number of seats made  available for sale
at various fares) to maximize system revenue.

         Slots

                  Slots are  reservations for takeoffs and landings at specified
times and are  required  by  governmental  authorities  to  operate  at  certain
airports.  The Company utilizes takeoff and landing slots at the LaGuardia,  New
York-JFK and White  Plains,  New York  airports.  Airlines may acquire  slots by
governmental  grant, by lease or purchase from other  airlines,  or by loan when
another  airline  does  not  use  a  slot  but  desires  to  avoid  governmental
reallocation  of a slot for lack of use. All leased and loaned slots are subject
to renewal and termination provisions.

                  As  of  March  2,  1998  the  Company  utilized  18  slots  at
LaGuardia, 15 slots at New York-JFK, and six slots at White Plains. Of the above
slots,  the Company  controls five at LaGuardia  and three at White Plains.  The
LaGuardia slots are issued under FAA  regulations  which provide that although a
carrier  may be a holder of a slot,  it has no  property  interest in such slot.
These slots can be withdrawn without  compensation under certain  circumstances.
The other slots  utilized by the Company are either  loaned or leased from other
carriers and are subject to varying renewal dates.  The Company believes that as
slots expire it will be able to either renew the lease or find substitute  slots
at similar prices.

                  In December 1997, the Company  applied to the U.S.  Department
of Transportation ("DOT") for 42 slots to operate three daily round-trip flights
with 50-passenger  regional jet aircraft between Chicago's O'Hare  International
Airport  and  each  of  the  following  cities:   Charleston,  WV;  Duluth,  MN;
Fayetteville,  AK; Montgomery, AL; Shreveport, LA; Springfield/Branson,  MO; and
Wilkes-Barre/Scranton,  PA.  These  flights  would  connect to ACA's  code-share
partner,  United, and other United Express operators at United's Chicago hub. An
affiliate of American  Airlines,  Inc.,  operating as American  Eagle,  has also
requested the DOT grant it slots to serve  Chicago  O'Hare from the same cities.
The DOT is expected to issue an order  granting or denying the carrier  requests
for slots to serve these city pair  markets.  There can be no assurance  whether
any or all slots will be granted to the Company by the DOT.

         Employees

                   As of March 2, 1998,  the Company had 1,454  full-time  and 
151  part-time  employees,  classified as follows:



<PAGE>




Classification                                   Full-Time       Part-Time

Pilots                                              566              -
Flight attendants                                   191              -
Station personnel                                   277             139
Maintenance personnel                               120               1
Administrative and clerical personnel               286              11
Management                                           14              -
                                              --------------- ---------------

                     Total employees             1,454              151
                                              =============== ===============

                  The Company's  pilots are  represented  by the Airline  Pilots
Association  ("ALPA"),  its  flight  attendants  by the  Association  of  Flight
Attendants  ("AFA"),  and its  mechanics  by the  Aircraft  Mechanics  Fraternal
Association ("AMFA").

                  The  ALPA  collective  bargaining  agreement  was  amended  on
February 26, 1997 and is effective  for three years.  The new contract  modifies
work rules to allow  more  flexibility,  includes  regional  jet pay rates,  and
transfers pilots into the Company's employee benefit plans. The Company believes
that the incremental cost as a result of the amendments to the contract will not
have any material effect on the Company's  financial  position or results of its
operations over the life of the agreement.

                  On  March  11,  1994,  AMFA  was  certified  by  the  National
Mediation Board (the "NMB") as the collective bargaining  representative elected
by mechanics  and related  employees of the Company.  As of March 2, 1998,  AMFA
represented  110 of the  Company's  employees.  The  Company  and AMFA have been
attempting  to negotiate  an initial  contract  under  federal  mediation  since
December 1994, but have so far failed to reach agreement.  The NMB has indicated
that it is in favor of continuing the negotiations,  and the Company anticipates
participating in further negotiations.  If, at some point, the NMB should decide
that the parties are  deadlocked,  the NMB could declare an impasse along with a
thirty day cooling off period.  At the conclusion of that period if an agreement
has not been reached,  AMFA would have the authority to use self help, up to and
including the right to strike.

                  The Company  and AMFA were also  engaged in  litigation  which
arose over certain  work rule  issues.  In  September  1997,  the U.S.  Court of
Appeals  for the Second  Circuit  ruled in favor of the  Company on all  matters
pending before it, thereby resolving the pending litigation.

                  The Company's  contract with the AFA became amendable on April
30, 1997. In March 1998, a tentative  agreement  between the Company and AFA was
rejected by a vote of the members.  The Company  expects to resume  negotiations
during the second  calendar  quarter of 1998 and will  continue to operate under
the terms of the existing agreement until negotiations are completed.

                  The  Company  believes  that the wage rates and  benefits  for
other  employee  groups  are  comparable  to  similar  groups at other  regional
airlines.  The Company is unaware of any  significant  organizing  activities by
labor unions among its other non-union employees at this time.

                  As the Company  continues to pursue its growth  strategy,  its
employee  staffing  needs and  recruitment  efforts  are  expected  to  increase
commensurately.  Due to competitive  local labor markets and normal attrition to
the major  airlines,  there can be no assurance that the Company will be able to
satisfy its hiring requirements.  The Company has committed additional resources
to its  employee  retention  efforts.  Annual  turnover  of  Company  pilots was
approximately 11% during 1997, compared to 18% during 1996.

         Pilot Training

                  The Company performs pilot training in state-of-the-art,  full
motion  simulators  and  conducts  training  in  accordance  with  FAA  Part 121
regulations.  In 1993, the Company initiated an Advanced  Qualification  Program
("AQP") to enhance pilot training in both technical and Crew Resource Management
("CRM") skills. The FAA has recognized the Company's  leadership in CRM training
by selecting the Company to participate in a FAA sponsored  training grant.  The
principal objective of the grant is to develop a prototype training program that
provides carriers with a more efficient  approach for integrating CRM procedures
into standard  operating  procedures.  For the past two and one half years,  the
Company  has worked  closely  with the FAA and George  Mason  University  in the
development  of  proceduralized  CRM. The second and final phase of the project,
operational implementation, began in August 1996 and is expected to be completed
in 1998.

         Aviation Safety

                  On December 20, 1995,  the FAA issued  regulation  14 CFR Part
119,  requiring air carriers  operating  aircraft  under 14 CFR Part 135, with a
seating capacity of ten to thirty seats,  excluding crew members, to comply with
and be certified  under the more stringent air carrier safety  regulation 14 CFR
Part 121 by March 20, 1997.  The Company has had an internal  audit  program for
flight  operations  in place since October 1993 and has been training all of its
flight crews under CFR Part 121 since February 1994.  Additionally,  the Company
appointed a safety  officer  during  1995.  The Company  continues  to emphasize
safety in its daily  operations and plans to implement  several new programs for
flight crews in 1997.

                  From time to the time,  the FAA  conducts  inspections  of air
carriers with varying degrees of intensity.  The Company underwent an intensive,
two-week FAA Regional  Aerospace  Inspection  Program ("RASIP") audit during the
fourth quarter of 1997. The final audit report consisted of recommendations  and
minor findings, none of which resulted in civil penalties. The Company responded
to the findings and believes  that it has met and continues to meet the required
standards  for  safety  and  operational  performance.   The  Company's  airline
operations will continue to be audited by the FAA for compliance with applicable
safety regulations.

         Regulation

                  Economic.  With the passage of the  Deregulation  Act, much of
the  regulation of domestic  airline  routes and rates was  eliminated.  The DOT
still has  extensive  authority to issue  certificates  authorizing  carriers to
engage  in  air  transportation,   establish  consumer  protection  regulations,
prohibit  certain  unfair  or   anti-competitive   pricing  practices,   mandate
conditions of carriage and make ongoing  determinations of a carrier's  fitness,
willingness  and ability to provide air  transportation.  The DOT can also bring
proceedings  for the  enforcement of its regulations  under  applicable  federal
statutes,  which  proceedings  may  result  in civil  penalties,  revocation  of
operating authority or criminal sanctions.

                  The Company  holds a  certificate  of public  convenience  and
necessity,  issued by the DOT, that authorizes it to conduct air  transportation
of  persons,  property  and mail  between all points in the United  States,  its
territories and possessions. This certificate requires that the Company maintain
DOT-prescribed minimum levels of insurance,  comply with all applicable statutes
and regulations and remain continuously "fit" to engage in air transportation.

                  Based  on  conditions  in  the  industry,  or as a  result  of
Congressional  directives  or statutes,  the DOT from time to time  proposes and
adopts new regulations or amends existing regulations.  For example, the DOT has
implemented  extensive   regulations  to  prevent  unfair,   discriminatory  and
deceptive practices by CRSs. Currently, these rules are being re-examined by the
DOT in light of changing  market  conditions  since they were last recodified in
1992. The DOT must either re-enact these regulations or revise them on or before
March 31, 1999.

                  The DOT has also enacted  rules  establishing  guidelines  for
setting  reasonable  airport charges and procedural  rules for challenging  such
charges.  The DOT  has  recently  adopted  a  compliance  policy  regarding  the
increasing use of ticketless travel and the  consumer-related  notices that must
be supplied to passengers  before  travel.  The DOT has also  proposed  rules to
implement a statutory directive and a Presidential Commission  recommendation to
improve notice to families of passengers involved in aviation accidents. The DOT
is  considering  the means by which it will require  domestic and  international
carriers  to  collect  additional   passenger-related   information,   including
emergency contact names and telephone numbers and other identifying information.
The  DOT  has  estimated  that  the  cost  to the  industry  of  obtaining  this
information from each passenger could be significant.

                  Safety. The FAA regulates the safety-related activities of air
carriers.  The  Company  is subject to the FAA's  jurisdiction  with  respect to
aircraft  maintenance  and  operations,  equipment,  ground  facilities,  flight
dispatch,  communications,  training, weather observation,  flight personnel and
other matters  affecting air safety.  To ensure compliance with its regulations,
the FAA  requires  that  airlines  under its  jurisdiction  obtain an  operating
certificate and operations  specifications for the particular aircraft and types
of operations  conducted by such airlines.  The Company possesses an Air Carrier
Certificate issued by the FAA and related authorities  authorizing it to conduct
operations  with  turboprop  and turbojet  equipment.  In addition,  the FAA has
approved the Company's  commencement of CRJ service.  The Company's authority to
conduct  operations is subject to  suspension,  modification  or revocation  for
cause.  The FAA has authority to bring  proceedings to enforce its  regulations,
which  proceedings  may result in civil or criminal  penalties or  revocation of
operating authority.

                  In  order  to  ensure  the  highest  level  of  safety  in air
transportation,  the FAA has authority to issue maintenance directives and other
mandatory orders relating to, among other things, inspection of aircraft and the
mandatory  removal and  replacement of parts that have failed or may fail in the
future. In addition, the FAA from time to time amends its regulations which such
amended regulations may impose additional regulatory burdens on the Company such
as the  installation  of  new  safety-related  items  (collision  and  windshear
avoidance systems and enhanced flight data recorders).  Depending upon the scope
of the FAA's order and amended  regulations,  these  requirements  may cause the
Company to incur substantial, unanticipated expenses.

                  The FAA requires air carriers to adopt and enforce  procedures
designed to safeguard property, ensure airport security and screen passengers to
protect against terrorist acts. The FAA, from time to time,  imposes  additional
security  requirements on air carriers and airport authorities based on specific
threats or world conditions or as otherwise  required.  The FAA and the industry
are cooperating to test a system by which  passengers and their baggage would be
more  closely  monitored  to ensure  that no bag is checked  without a passenger
boarding the aircraft.  The Company incurs substantial expense in complying with
current  security  requirements  and it cannot predict what additional  security
requirements  may be imposed in the  future or the cost of  complying  with such
requirements.

                  Associated  with  the  FAA's  security  responsibility  is its
program  to ensure  compliance  with  rules  regulating  the  transportation  of
hazardous  materials.  The Company  both  accepts and ships  approved  hazardous
materials  for  transportation  and must train its  employees  to  identify  and
properly  handle  such  materials.  The  FAA  enforces  its  hazardous  material
regulations by the imposition of civil penalties, which can be substantial.

                  Other Regulation. In the maintenance of its aircraft fleet and
ground  equipment,  the  Company  handles  and  uses  many  materials  that  are
classified as hazardous.  The Environmental  Protection Agency and similar local
agencies have  jurisdiction over the handling and processing of these materials.
The Company is also  subject to the  oversight  of the  Occupational  Safety and
Health Administration concerning employee safety and health matters. The Company
is subject to the Federal Communications Commission's jurisdiction regarding the
use of radio facilities.

                  The Airport Noise Control Act ("ANCA")  requires that airlines
phase-out  the  operation of certain  types of aircraft.  None of the  Company's
aircraft are subject to the phase-out  provisions of ANCA.  While ANCA generally
preempts airports from imposing unreasonable local noise rules that restrict air
carrier   operations,   airport   operators   may   implement   reasonable   and
nondiscriminatory  local noise  abatement  procedures,  which  procedures  could
impact the ability of the Company to serve  certain  airports,  particularly  in
off-peak   hours.   Certain  local  noise  rules  adopted  prior  to  ANCA  were
grandfathered under the statute.

                  Federal  Excise  Taxes.  Ticketing  airlines are  obligated to
collect a U.S.  transportation  excise tax on passenger ticket sales.  This tax,
known as the  aviation  trust tax or the "ticket tax" is used to defray the cost
of FAA operations and other aviation  programs.  Recently,  the federal  statute
authorizing  the ticket tax expired on two separate  occasions - from January 1,
1996 through  August 26, 1996,  and from January 1, 1997 through  March 6, 1997.
Ticketing  airlines  did not collect the ticket tax during  these  periods.  The
ticket  tax was  most  recently  reinstated  effective  March 7,  1997,  with an
expiration  date of September 30, 1997.  Beginning on October 1, 1997, a revised
formula for determining the ticket tax took effect.  Under this revised formula,
the ticket tax is now comprised of a percentage  of the  passenger  ticket price
plus a flat fee for each segment flown, and will be adjusted  annually.  For the
period from October 1, 1997  through  September  30,  1998,  the ticket tax will
equal nine percent of passenger ticket price plus $1 per segment.

         Seasonality

                  As is common in the industry,  the Company  experiences  lower
demand for its product during the period of December through  February.  Because
the  Company's  services  and  marketing  efforts  are  focused on the  business
traveler, this seasonality of demand is somewhat greater than for airlines which
carry a larger  proportion  of leisure  travelers.  In addition,  the  Company's
principal geographic area of operations  experiences more adverse weather during
this period, causing a great77er percentage of the Company's and other airlines'
flights to be canceled.  These  seasonal  factors  have  combined in the past to
reduce the Company's capacity, traffic,  profitability,  and cash generation for
this three month period as compared to the rest of the year.


Item 2.           Properties

         Leased Facilities

                  Airports

                  The  Company  leases  gate and ramp  facilities  at all of the
airports it serves and leases ticket counter and office space at those locations
where ticketing is handled by Company personnel. Payments to airport authorities
for ground  facilities  are  generally  based on a number of factors,  including
space occupied as well as flight and passenger volume. The Company believes that
it can accommodate through various arrangements the new flights it plans, and is
exploring  possible   long-term   solutions  for  assuring  access  to  adequate
facilities at Washington-Dulles.

                  Corporate Offices

                  On February 15, 1997, the Company established new headquarters
in Dulles, VA. The new facility provides over 45,000 square feet in one building
for the executive, administrative, training and system control departments. This
facility  compares to the previous  space  consisting  of  approximately  28,500
square feet divided  between two  buildings.  The Company  believes that the new
headquarters  provides  adequate  facilities  to conduct its current and planned
operations.

                  Maintenance Facilities

                  The FAA's safety regulations  mandate periodic  inspection and
maintenance  of commercial  aircraft.  The Company  performs  most  maintenance,
service and inspection of its aircraft and engines at its maintenance facilities
using its own personnel.

                  In February 1998,  the Company  occupied its new 90,000 square
foot  aircraft  maintenance  facility  comprised of 60,000 square feet of hangar
space and 30,000 square feet of support space at Washington-Dulles.  The Company
has  consolidated  all  maintenance  functions to this facility  which  includes
hangar, shop and office space necessary to maintain the Company's growing fleet.


Item 3.           Legal Proceedings

                  The  Company  is  a  party  to  routine   litigation  and  FAA
proceedings  incidental  to its  business,  none of  which is  likely  to have a
material  effect on the  Company's  financial  position  or the  results  of its
operations.

     The Company is a party to an action  pending in the United States  District
Court for the Southern District of Ohio, Peter J. Ryerson,  administrator of the
estate of David Ryerson,  v. Atlantic Coast Airlines,  Case No. C2-95-611.  This
action is more fully  described in the Company's  Annual Report on Form 10-K for
the fiscal year ended  December 31, 1995.  On March 10, 1997,  the Court granted
Plaintiff's  motion to the effect that  liability  would not be limited to those
damages available under the Warsaw  Convention.  The Company is currently unable
to estimate the monetary  award,  if any,  resulting from this  litigation,  but
believes it remains fully covered under the Company's insurance policy.
     
     The Company is also a party to an action pending in the United States Court
of Appeals for the Fourth  Circuit  known as Afzal v. Atlantic  Coast  Airlines,
Inc.  (No.  98-1011).  This action is an appeal of the  December  1997  decision
granted  in favor of the  Company in a case  claiming  wrongful  termination  of
employment  brought in the United States District Court for the Eastern District
of Virginia known as Afzal v. Atlantic Coast  Airlines,  Inc.  (Civil Action No.
96-1537-A).  The  Company  does not expect the  outcome of this case to have any
material adverse effect on its financial condition or results of its operations.

Item 4.  Submission of Matters to a Vote of Security Holders

     No matter was submitted  during the fiscal quarter ended December 31, 1997,
to a vote of the security  holders of the Company  through the  solicitation  of
proxies or otherwise.

                                                        PART II

Item 5.           Market for Registrant's Common Equity and Related
Stockholder Matters

                  The  Company's  common  stock,  par value  $.02 per share (the
"Common Stock"), is traded on the Nasdaq National Market ("Nasdaq/NM") under the
symbol "ACAI". Trading of the Common Stock commenced on July 21, 1993.

                  The  following  table  sets  forth the  reported  high and low
closing  sale  prices  of the  Common  Stock on the  Nasdaq/NM  for the  periods
indicated:

       1996                           High                       Low
       ----                          ----                       ---
       First quarter               $16.250                    $7.375
       Second quarter               17.125                    12.625
       Third quarter                15.875                    11.000
       Fourth quarter               13.125                      9.25

       1997
       First quarter               $17.000                   $11.800
       Second quarter               17.250                    12.250
       Third quarter                22.000                    15.500
       Fourth quarter               31.875                    18.500

       1998
       First quarter               $45.000                   $29.750
       (through March 2, 1997)

                  As of March 2, 1998,  the  closing  sales  price of the Common
Stock on Nasdaq/NM was $44.00 per share and there were approximately 109 holders
of record of Common Stock.

                  The  Company  has not paid any cash  dividends  on its  Common
Stock and does not  anticipate  paying any Common  Stock cash  dividends  in the
foreseeable future. The Company intends to retain earnings to finance the growth
of its operations. The payment of Common Stock cash dividends in the future will
depend upon such factors as earnings levels, capital requirements, the Company's
financial  condition,  the  applicability of any  restrictions  imposed upon the
Company's subsidiary by certain of its financing  agreements,  and other factors
deemed relevant by the Board of Directors. In addition, Atlantic Coast Airlines,
Inc. is a holding  company and its only  significant  asset is its investment in
its subsidiary, Atlantic Coast Airlines.

                  In January  1996,  the Company's  Board of Directors  declared
dividends of  approximately  $0.3 million on its Redeemable  Series A Cumulative
Convertible  Preferred Stock  representing the cumulative  dividend for the full
year 1995. The Company paid these dividends in February 1996. On March 29, 1996,
the Company redeemed all of the preferred stock for $3.8 million.  The preferred
stock was issued to JSX Capital  Corporation  ("JSX"),  a subsidiary  of British
Aerospace,  Inc. in December 1994 as part of a $20 million  financing  agreement
consisting of an equity investment and available borrowings.

                  On July 2, 1997,  the  Company  issued $50  million  aggregate
principal  amount of 7.0% Convertible  Subordinated  Notes due July 1, 2004 (the
"Notes"),  pursuant to Rule 144A under the  Securities Act of 1933, and received
net proceeds of approximately $48.3 million related to the sale of the Notes. On
July 18, 1997, the Company received  additional net proceeds of $7.3 million for
the exercise of the over-allotment option. The notes are convertible into shares
of Common  Stock,  par value $0.02 of the Company  (the  "Common  Stock") by the
holders  at any time after  sixty days  following  the latest  date of  original
issuance  thereof  and  prior  to  maturity,   unless  previously   redeemed  or
repurchased,  at a  conversion  price  of $18  per  share,  subject  to  certain
adjustments.  The Company may not call the notes for redemption prior to July 1,
2000.

                  In  January  1998,  $5.9  million  face  amounts of Notes were
converted at the option of several  holders into 330,413 shares of the Company's
Common Stock. On March 3, 1998, the Company  notified  holders of the Notes that
the Company was temporarily reducing the conversion price in order to induce the
holders to redeem their Notes for Common Stock. If all remaining  holders of the
Notes  converted  to Common  Stock  pursuant to this  inducement,  approximately
46,000  shares  of  Common  Stock  will be  issued  representing  the  reduction
component  of the  conversion  price.  The  holders  have until April 8, 1998 to
accept the Company's inducement.

                  In July 1997, the Company  repurchased  1.46 million shares of
the  Company's  Common Stock from British  Aerospace  for $16.9  million using a
portion of the proceeds received from the issuance of the Notes.


Item 6.           Selected Financial Data

                  The  following  selected  financial  data  under  the  caption
"Consolidated  Financial Data" and "Consolidated Balance Sheet Data" relating to
the years ended December 31, 1993,  1994,  1995, 1996 and 1997 have been derived
from the Company's  consolidated  financial  statements.  The following selected
operating  data under the caption  "Selected  Operating  Data" have been derived
from Company records.  The data should be read in conjunction with "Management's
Discussion  and Analysis of Results of Operations  and Financial  Condition" and
the Consolidated  Financial  Statements and Notes thereto included  elsewhere in
this Annual Report on Form 10-K.


<PAGE>

<TABLE>

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA
(Dollars in thousands, except per share and related operating data)

Consolidated Financial Data:                                       Years ended December 31,
<CAPTION>

                                                       1993                1994               1995             1996             1997
                                            ----------------    ----------------   ----------------   --------------    ------------
<S>                                         <C>                 <C>                <C>                <C>               <C>    

Operating revenues:
  Passenger revenues                              $145,786            $156,047            $153,918         $179,370         $202,540
  Total operating revenues                         149,103             158,919             156,968          182,484          205,444
Operating expenses:
  Salaries and related costs                        35,162              41,590              40,702           44,438           49,661
  Aircraft fuel                                     15,397              15,189              13,303           17,124           17,766
  Aircraft maintenance and materials                19,714              22,345              15,252           16,841           16,860
  Aircraft rentals                                  31,087              35,565              25,947           29,137           29,570
  Traffic commissions and related fees              22,914              25,913              25,938           28,550           32,667
  Depreciation and amortization                      1,654               2,329               2,240            2,846            3,566
  Other                                             20,608              25,167              21,262           23,711           26,411
  Write-off of  intangible assets                        -               6,000                   -                -                -
  Restructuring charges (reversals)                      -               8,099               (521)            (426)                -
                                            ----------------    ----------------   ----------------   --------------
                                                                                                                        ------------
  Total operating expenses                         146,536             182,197             144,123          162,221          176,501

                                                                
                                            ----------------    ----------------   ----------------   --------------    ------------
Operating income (loss)                              2,567            (23,278)              12,845           20,263           28,943

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

  Interest expense                                 (2,298)             (2,153)             (1,802)          (1,013)          (3,450)
  Interest income                                       60                   -                  66              341            1,284
  Other (expenses) income                            (225)                 295                 181               17               62
                                                                
                                            ----------------    ----------------   ----------------   --------------    ----------
Total non operating expenses                       (2,463)             (1,858)             (1,555)            (655)          (2,104)
                                            ----------------    ----------------   ----------------   --------------    ------------

Income (loss) before income tax expense
   and extraordinary item                              104            (25,136)              11,290           19,608           26,839
Income tax provision (benefit)                          67                   -             (1,212)              450           12,339
                                            ----------------    ----------------   ----------------   --------------    ------------

Income (loss) before extraordinary item                 37            (25,136)              12,502           19,158           14,500
Extraordinary item (1)                             (1,780)                   -                 400                -                -
                                            ----------------    ----------------   ----------------   --------------    ------------
  Net Income (loss)                               $(1,743)           $(25,136)             $12,902          $19,158          $14,500
                                            ================    ================   ================   ==============    ============


</TABLE>

<PAGE>

<TABLE>

SELECTED CONSOLIDATED  FINANCIAL AND OPERATING  DATA 
(Dollars in thousands, except per share and related operating data)

                                                                   Years ended December 31,
<CAPTION>

                                                 1993              1994             1995                1996                1997
                                             
                                             --------------    --------------   --------------    -----------------    -------------
Income (loss) per share:

  <S>                                        <C>               <C>              <C>               <C>                  <C>        
  Basic:
    Income (loss) before extraordinary item         $0.01            $(3.67)           $1.46                $2.25             $1.85
    Extraordinary item                              (0.29)                -             0.05                    -                 -
                                             ==============   ===============   ==============    =================    =============
  Net  income (loss) per share                     $(0.28)           $(3.67)           $1.51                $2.25             $1.85
                                             ==============   ===============   ==============    =================    =============

  Diluted:
    Income (loss) before extraordinary item         $0.01            $(3.67)           $1.29                $2.15             $1.61
    Extraordinary item                              (0.29)                -             0.04                    -                 -
                                             ==============   ===============   ==============    =================    =============
  Net  income (loss) per share                     $(0.28)           $(3.67)           $1.33                $2.15             $1.61
                                             ==============   ===============   ==============    =================    =============



Weighted average  number of shares used
   in computation  (in thousands)
      Basic                                         6,083             6,858             8,342                8,481             7,824
      Diluted                                       6,083             6,858             9,871                8,920             9,756
Selected Operating Data:
    Departures                                     97,291           134,804           131,470              137,924           146,069
    Revenue passengers carried                  1,445,878         1,545,520         1,423,463            1,462,241         1,666,975
    Revenue passenger miles (000s) (2)            381,489           393,013           348,675              358,725           419,977
    Available seat miles (000s) (3)               853,668           885,744           731,109              771,068           861,222
    Passenger load factor (4)                       44.7%             44.3%             47.7%                46.5%             48.8%
    Breakeven passenger load factor (5)             43.9%             47.0%             43.9%                41.4%             41.8%
    Revenue per available seat mile                $0.175            $0.179            $0.215               $0.237            $0.239
    Cost per available seat mile (6)               $0.171            $0.189            $0.198               $0.211            $0.205
    Average yield per revenue passenger            $0.382            $0.397            $0.441               $0.500            $0.482
          mile (7)
    Average fare                                     $101              $101              $108                 $123              $122
    Average passenger trip length (miles)             264               254               245                  245               252
    Aircraft in service (end of period)                62                56                54                   57                65
    Destinations served (end of period)                54                42                41                   39                43

Consolidated Balance Sheet Data:
    Working capital (deficiency)                  $(3,935)           (4,488)           $4,552              $17,782           $45,177
    Total assets                                   52,448            40,095            47,499               64,758           148,992
    Long-term debt and capital leases, less
     current portion                                5,941             6,675             7,054                5,673            76,146
         
    Redeemable common stock warrants                    -                 -                 -                    -                 -
    Redeemable Series A, Cumulative,
     Convertible, Preferred Stock                       -             3,825             3,825                    -                 -
         
    Total stockholders' equity                     19,595             1,922            14,561               34,637            34,805

</TABLE>

<PAGE>


     (1)  In connection with the early  extinguishment  of certain senior notes,
          in 1993 the Company  recorded an  extraordinary  charge of  $1,779,583
          resulting  from  the  write-off  of the  unamortized  portion  of debt
          discount  and  the  deferred   finance  costs   associated   with  the
          extinguished  debt;  and in 1995  an  extraordinary  gain of  $400,000
          related   to  the   early   extinguishment   of   debt.   No   similar
          extinguishments were recognized in 1996 or 1997.

     (2)  "Revenue  passenger  miles" or "RPMs"  represent  the  number of miles
          flown by revenue passengers.


     (3)  "Available  seat  miles"  or  "ASMs"  represent  the  number  of seats
          available for passengers  multiplied by the number of scheduled  miles
          the seats are flown.

     (4)  "Passenger  load factor"  represents the percentage of seats filled by
          revenue  passengers  and is calculated by dividing  revenue  passenger
          miles by available seat miles.

     (5)  "Breakeven  passenger load factor"  represents the percentage of seats
          filled by  revenue  passengers  for the  airline  to break  even after
          operating  expenses,  less other revenues and excluding  restructuring
          and write-offs of intangible  assets. Had restructuring and write-offs
          of intangible  assets been  included for the years ended  December 31,
          1993,  1994,  1995,  1996 and 1997,  this  percentage  would have been
          43.9%,  51.0%,  43.8%, 41.3% and 41.8%,  respectively.  
    
     (6)  "Operating  cost per available seat mile"  represents  total operating
          expenses  excluding  restructuring and write-offs of intangible assets
          divided by available seat miles. Had  restructuring  and write-offs of
          intangible assets been included for the years ended December 31, 1993,
          1994,  1995,  1996 and 1997,  cost per available  seat mile would have
          been  $0.172,  $0.206,  $0.197,  $0.210 and $0.205  respectively.  

     (7)  "Average  yield per revenue  passenger  mile"  represents  the average
          passenger  revenue  received  for each  mile a  revenue  passenger  is
          carried.

<PAGE>


Item 7.        Management's Discussion and Analysis of Results of Operations  
               and Financial Condition

General

                  In  1997,  Atlantic  Coast  Airlines,  Inc.  ("ACAI")  and its
wholly-owned  subsidiary,   Atlantic  Coast  Airlines  ("ACA"),  together  ("the
Company"),  posted  a profit  of $14.5  million  compared  to a profit  of $19.2
million for 1996, and $12.9 million in 1995. The reduced profitability from 1996
to 1997 is primarily  due to an increase in the  Company's  provision for income
taxes of  approximately  $12.3  million  in 1997 as  compared  to  approximately
$500,000 for 1996.  The increase in the tax  provision in 1997 reflects the full
utilization  of net operating loss  carryforwards  in 1996 and the use of a more
conservative  approach to estimating  permanent  differences between taxable and
book income. Pretax income increased 37% from 1996 to 1997 principally caused by
a 2.3 point load factor gain and a 2.8%  reduction  in cost per  available  seat
mile ("ASM") partially offset by a 3.6% reduction in yield. The improvement from
1995 to 1996 reflects  increases in the Company's  yields as well as a reduction
in  the  break-even   passenger  load  factor.   Management  believes  that  the
improvement  from 1995 to 1996 is attributable  to the benefits  realized from a
major  restructuring  in  1994.  As a  result  of these  actions,  coupled  with
improvements in yield management,  marketing,  and a generally improved economic
environment for airlines,  the Company  returned to  profitability in the second
quarter 1995, achieving record operating profits for 1995, 1996 and 1997.

Results of Operations

                  The  Company  earned net income of $14.5  million or $1.61 per
diluted  share in 1997  compared  to net  income of $19.2  million  or $2.15 per
diluted  share in 1996,  and $12.9  million or $1.33 per diluted  share in 1995.
During 1997, the Company generated operating income of $28.9 million compared to
$20.3 million for 1996, and $12.8 million for 1995.  Operating margins for 1997,
1996 and 1995 were 14.1%, 11.1% and 8.2%, respectively.

     The  improvement  in operating  results  from 1996 to 1997  reflects a 1.0%
increase in unit revenue (revenue per ASM) from $0.237 to $0.239 coupled with an
11.7% increase in ASMs and a 2.8% decrease in unit cost (cost per ASM).

                  The  improvement  in  operating  results  from  1995  to  1996
reflects a 10.2%  increase  in unit  revenue  (revenue  per ASM) from  $0.215 to
$0.237 coupled with a 5.5% increase in ASMs partially  offset by a 6.6% increase
in unit cost (cost per ASM).  These results were achieved  despite a challenging
operating  environment  brought about by a 20.5% increase in the cost per gallon
of fuel in 1996.

Fiscal Year 1996 vs. 1997

Operating Revenues

     The Company's  operating revenues increased 12.6% to $205.4 million in 1997
compared to $182.5 million in 1996. The increase resulted from an 11.7% increase
in ASMs,  an increase in load factor of 2.3 points,  partially  offset by a 3.6%
decrease in yield.

                  The reduction in yield is related in part to the reinstatement
of the federal excise ticket tax from March 7, 1997 through the remainder of the
year.  During 1996, this tax was only in effect from August 27, 1996 to December
31, 1996. Total passengers  increased 14.0% in 1997 compared to 1996 as a result
of the 11.7% increase in ASMs and 2.3 point increase in load factor.

Operating Expenses

                  The  Company's  operating  expenses  increased  8.8% to $176.5
million in 1997  compared to $162.2  million in 1996 due  primarily  to an 11.7%
increase in ASMs,  and a 14.0%  increase  in  passengers.  The  increase in ASMs
reflects  the net  addition  of five  British  Aerospace  Jetstream-41  ("J-41")
aircraft during 1997.

     A summary of operating  expenses as a percentage  of operating  revenue and
operating  cost per ASM for the years  ended  December  31,  1996 and 1997 is as
follows:
<TABLE>


                                                                 Year Ended December 31,
                                                        1996                            1997
<CAPTION>
                                            ------------------------------ --------------------------------
                                              Percent of         Cost        Percent of          Cost
                                               Operating       per ASM        Operating        per ASM
                                               Revenues        (cents)        Revenues         (cents)
                                            --------------- ---------------- ------------- ---------------- 
<S>                                         <C>             <C>              <C>           <C>    
                                            
Salaries and related costs                       24.4%           5.8            24.2%            5.8
Aircraft fuel                                     9.4%           2.2             8.6%            2.1
Aircraft maintenance and materials                9.2%           2.2             8.2%            2.0
Aircraft rentals                                 16.0%           3.8            14.4%            3.4
Traffic commissions and related fees             15.6%           3.7            15.9%            3.8
Depreciation and amortization                     1.6%            .4             1.7%             .4
Other                                            13.0%           3.0            12.9%            3.0
                                            ---------------- ------------- ---------------- ---------------

    Total (before reversals of
    restructuring charges)                       89.2%           21.1           85.9%            20.5
                                            ---------------- ------------- ---------------- ---------------
</TABLE>

                  Costs  per  ASM  before  reversals  of  restructuring  charges
decreased  2.8% to 20.5 cents in 1997  compared to 21.1 cents in 1996  primarily
due to an 11.7%  increase in ASMs in 1997  compared  to 1996,  offset by a 14.0%
increase in  passengers  carried.  The  increase in ASMs  resulted  from the net
addition of five J-41 aircraft and five 50-seat  Canadair  Regional Jets ("CRJ")
aircraft along with a 1.8% improvement in daily aircraft block hour utilization.

                  Salaries and related  costs per ASM remained  unchanged at 5.8
cents in 1997  compared  to 1996.  In  absolute  dollars,  salaries  and related
expenses  increased  11.9% from $44.4  million in 1996 to $49.7 million in 1997.
The increase  resulted from  additional  flight payroll related to a contractual
increase in May 1996 and February  1997 and a 10.7%  increase in profit  sharing
expense year over year.

                  The cost per ASM of aircraft  fuel  decreased  to 2.1 cents in
1997 compared to 2.2 cents in 1996. The total cost of fuel per gallon  decreased
4.2% to 79.3 cents in 1997 compared to 82.8 cents in 1996. In absolute  dollars,
aircraft fuel expense increased 4.1% from $17.1 million in 1996 to $17.8 million
in 1997.

                  The  cost  per  ASM  of  aircraft  maintenance  and  materials
decreased  to 2.0 cents in 1997  compared  to 2.2 cents in 1996.  The  decreased
maintenance expense resulted primarily from the receipt of performance guarantee
fees from an overhaul  vendor.  In absolute  dollars,  aircraft  maintenance and
materials  expense increased 0.6% from $16.8 million in 1996 to $16.9 million in
1997.

                  The cost per ASM of aircraft rentals decreased to 3.4 cents in
1997  compared  to 3.8 cents in 1996.  The  decreased  unit  costs  reflect  the
refinancing  to lower rental rates of eleven used J-41 aircraft and the purchase
by the Company of three used J-41s. All of these  transactions were accomplished
in the second half of 1997. In absolute dollars, aircraft rentals increased 1.7%
from $29.1 million in 1996 to $29.6 million in 1997.

                  The cost  per ASM of  traffic  commissions  and  related  fees
increased  to 3.8 cents in 1997  compared  to 3.7 cents in 1996.  The  increased
commissions reflect the contractual increases in program fees paid to United and
a higher  percentage of tickets sold by travel  agencies.  Commission rates as a
percent of total passenger  revenue fluctuate based on the mix of commissionable
and  non-commissionable  tickets,  and have  changed  due to a cap on the  total
amount of commission that travel agents can earn. Commissions as a percentage of
total  passenger  revenue  averaged 7.3% in 1997 and 7.4% in 1996.  Related fees
include  program fees to United and segment  booking fees for  reservations.  In
absolute  dollars,  traffic  commissions  and related fees increased  14.3% from
$28.6 million in 1996 to $32.7 million in 1997.

                  The cost per ASM of  depreciation  and  amortization  remained
unchanged  at 0.4  cents  in  1997  compared  to  1996.  Absolute  increases  in
depreciation  expense were offset by increases  in ASMs.  The absolute  increase
results primarily from the purchase of four J-41 aircraft (one of these aircraft
was new to the fleet in 1997),  additional  rotable spare parts  associated with
additional J-41 aircraft,  improvements to aircraft,  leasehold improvements and
purchases  of  computer  equipment.   In  absolute  dollars,   depreciation  and
amortization  expense  increased 28.6% from $2.8 million in 1996 to $3.6 million
in 1997.

                  The  cost  per  ASM  of  other  operating   expenses  remained
unchanged at 3.0 cents in 1997 compared to 1996.  Absolute increases were offset
by increased ASMs. The absolute increase in expenses are primarily  attributable
to increased  facility  rents and  distressed  passenger  expenses.  In absolute
dollars,  other operating expenses increased 11.4% from $23.7 million in 1996 to
$26.4 million in 1997.

                  As a result of the foregoing  expense items,  total  operating
expenses before reversals of  restructuring  charges were  approximately  $176.5
million for 1997, an increase of 8.5% compared to $162.6 million in 1996.  Total
ASMs  increased  11.7% year over year and the cost per ASM  decreased  from 21.1
cents for 1996 to 20.5 cents for 1997.

                  The Company reversed excess restructuring reserves of $426,000
in 1996 (0.1 cents per ASM). The Company  established the reserves with a charge
of $8.1 million in 1994. The reversals  reflected  remaining unused reserves for
pilot  requalification,   return  conditions,  spare  parts  reconciliation  and
miscellaneous  professional  fees.  As of  December  31,  1996,  there  were  no
remaining reserves related to the restructuring.

                  Interest expense,  net of interest income, was $2.2 million in
1997 and $672,000 in 1996. The increased expense reflects the Company's issuance
in July  1997 of $57.5  million  of 7%  convertible  debt and $16.4  million  of
equipment  notes  associated  with pass  through  trust  certificates  issued in
September 1997 reduced by a significant  increase in the Company's cash balances
in 1997 and use of proceeds from the  convertible  debt to repay higher interest
bearing debt.

                  The  Company   recorded  a  provision   for  income  taxes  of
approximately  $12.3 million for 1997,  compared to a provision for income taxes
of approximately  $500,000 in 1996. The 1996 effective tax rate of approximately
2.3% is  significantly  less than the  statutory  federal  and  state  rates due
principally to the full utilization of net operating loss  carryforwards and the
elimination  of  the  valuation  allowance.  The  1997  effective  tax  rate  of
approximately  46% is higher than the  statutory  federal and state  rates.  The
Company  believes the higher  effective tax rate is nonrecurring  and reflects a
more conservative  approach to estimating permanent  differences between taxable
and book income.  The Company  expects a more  normalized  effective tax rate in
1998.  The  Company  has  recorded  a net  deferred  tax asset of  approximately
$688,000 at December 31, 1997  compared to $3.1 million at December 31, 1996. No
net operating loss carryforwards were available for 1997.

Fiscal Year 1995 vs. 1996

Operating Revenues

                  The Company's  operating  revenues  increased  16.2% to $182.5
million in 1996 compared to $157 million in 1995.  The increase  resulted from a
5.5% increase in ASMs and a 13.3% increase in yield,  partially  offset by a 1.2
percentage point decrease in passenger load factor.

                  The increase in yield is related in part to the  expiration of
the ticket tax on December 31, 1995. The increase in yield caused by this factor
cannot be  determined  nor can the  impact on  revenue  that  resulted  from the
reinstatement of the tax on August 27, 1996. Revenue per ASM improved 10.2% year
over year. Total passengers increased 2.7% in 1996 compared to 1995.

Operating Expenses

     The Company's  operating  expenses increased 12.6% in 1996 compared to 1995
due primarily to a 5.5% increase in ASMs, and a 2.7% increase in passengers. The
increase in ASMs reflects the addition of two J-41 aircraft.

     A summary of operating  expenses as a percentage of operating  revenues and
operating  cost per ASM for the years  ended  December  31,  1995 and 1996 is as
follows:
                                                                 






<PAGE>
<TABLE>

                                                                 Year Ended December 31,
                                                         1995                           1996
<CAPTION>
                                             ------------------------------ ------------------------------
                                               Percent of        Cost        Percent of         Cost
                                               Operating        per ASM       Operating       per ASM
                                                Revenues        (cents)       Revenues        (cents)
                                             --------------- -------------- -------------- ---------------

<S>                                          <C>             <C>            <C>            <C>   
Salaries and related costs                        25.9%            5.7          24.4%           5.8
Aircraft fuel                                      8.5%            1.8           9.4%           2.2
Aircraft maintenance and materials                 9.7%            2.1           9.2%           2.2
Aircraft rentals                                  16.5%            3.5          16.0%           3.8
Traffic commissions and related fees              16.5%            3.5          15.6%           3.7
Depreciation and amortization                      1.4%             .3           1.6%            .4
Other                                             13.6%            2.9          13.0%           3.0
                                             --------------- -------------- -------------- ---------------
    Total (before reversals of
    restructuring charges)                        92.1%          19.8           89.2%          21.1
                                             --------------- -------------- -------------- ---------------
</TABLE>

                  Cost  per  ASM  before  reversals  of  restructuring   charges
increased  6.6% to 21.1 cents in 1996  compared to 19.8 cents in 1995  primarily
due to the  increased  cost of fuel,  increases in aircraft  rental  expense and
landing fees from  additional  aircraft and additional  traffic  commissions and
related fees resulting from a 16.3% increase in total operating  revenue.  These
factors were slightly offset by a 5.5% increase in ASMs.

                  Salaries and related  costs per ASM  increased to 5.8 cents in
1996 compared to 5.7 cents in 1995. The increase resulted from additional flight
payroll  related to a contractual  increase in May 1996 and an 80.4% increase in
profit  sharing  year over year.  In  absolute  dollars,  salaries  and  related
expenses increased 9.1% from $40.7 million in 1995 to $44.4 million in 1996.

                  The total cost per ASM of aircraft fuel increased to 2.2 cents
in 1996  compared  to 1.8  cents  in 1995.  The  total  cost of fuel per  gallon
increased  20.5% due to increases in aircraft  fuel prices and the 4.3 cents per
gallon fuel tax imposed by the federal  government in October 1995.  The average
cost per  gallon,  including  into-plane  fees,  was 82.8 cents in 1996 and 68.7
cents in 1995. In absolute  dollars,  aircraft fuel expense increased 28.6% from
$13.3 million in 1995 to $17.1 million in 1996.

                  The  cost  per  ASM  of  aircraft  maintenance  and  materials
increased  to 2.2 cents in 1996  compared  to 2.1 cents in 1995.  The  increased
maintenance  expense  resulted  primarily from an increase in the average age of
the fleet,  the  expiration  of warranty  coverage on certain  aircraft and rate
increases in contract  maintenance for engines.  In absolute  dollars,  aircraft
maintenance and materials  expense  increased 9.8% from $15.3 million in 1995 to
$16.8 million in 1996.

                  The cost per ASM of aircraft rentals increased to 3.8 cents in
1996  compared  to 3.5  cents  in  1995.  The  increased  expenses  reflect  two
additional J-41 aircraft  delivered in 1996 and the full year effect of aircraft
delivered in 1995. In absolute  dollars,  aircraft rentals  increased 12.4% from
$25.9 million in 1995 to $29.1 million in 1996.

                  The cost  per ASM of  traffic  commissions  and  related  fees
increased  to 3.7 cents in 1996  compared  to 3.5 cents in 1995.  The  increased
commission reflects the increase in passenger revenue and contractual  increases
in program fees paid to United.  Commission  rates fluctuate based on the mix of
commissionable and non-commissionable  tickets, and have changed due to a cap on
the total amount of  commission  that travel  agents can claim.  Commission as a
percentage of total  passenger  revenue  averaged 7.4% in 1996 and 8.0% in 1995.
Related  fees  include  program  fees to United  and  segment  booking  fees for
reservations.   In  absolute  dollars,  traffic  commissions  and  related  fees
increased 10.4% from $25.9 million in 1995 to $28.6 million in 1996.

                  The cost per ASM of depreciation and amortization increased to
0.4 cents in 1996 compared to 0.3 cents in 1995. The increase results  primarily
from  the  acquisition  of  additional   rotable  spare  parts  associated  with
additional J-41 aircraft,  improvements to aircraft,  leasehold improvements and
purchases  of  computer   equipment.   There  were  no  significant  changes  in
amortization  in either 1996 or 1995.  In  absolute  dollars,  depreciation  and
amortization  expense  increased 27.3% from $2.2 million in 1995 to $2.8 million
in 1996.

                  The cost per ASM of other operating  expenses increased to 3.0
cents in 1996  compared  to 2.9  cents  in  1995.  The  increased  expenses  are
primarily  attributable  to increased  glycol costs  resulting  from  relatively
severe winter weather, additional pilot training costs and increased legal fees.
In absolute dollars, other operating expenses increased 11.3% from $21.3 million
in 1995 to $23.7 million in 1996.

                  As a  result  of the  foregoing  components,  total  operating
expenses before reversals of  restructuring  charges were  approximately  $162.6
million for 1996, an increase of 12.4% compared to $144.6 million in 1995. Total
ASMs  increased  5.5% year over  year and the cost per ASM  increased  from 19.8
cents for 1995 to 21.1 cents for 1996.

                  The Company reversed excess restructuring reserves of $426,000
in 1996  (0.1  cents per ASM) and  $521,000  in 1995  (0.1  cents per ASM).  The
Company  established  the reserves  with a charge of $8.1  million in 1994.  The
reversals reflected remaining unused reserves for pilot requalification,  return
conditions,  spare parts reconciliation and miscellaneous  professional fees. As
of  December  31,  1996,  there  were  no  remaining  reserves  related  to  the
restructuring.

                  Interest expense, net of interest income, was $672,000 in 1996
and $1.7 million in 1995.  The decreased  expense  reflects  reduced  borrowings
under  the  Company'  accounts  receivable  financing  facility  and  the  early
retirement  of a $4  million  convertible  term  note to  British  Aerospace  in
December 1995.

                  The  Company   recorded  a  provision   for  income  taxes  of
approximately  $500,000 for 1996,  compared to a benefit of  approximately  $1.2
million in 1995.  The benefit  recorded in 1995 reflects the  recognition of the
deferred  tax  asset of $1.5  million  in the  fourth  quarter  of 1995,  net of
valuation  allowance.  The  1996  effective  tax rate of  approximately  2.3% is
significantly less than the statutory federal and state rates due principally to
the full utilization of net operating loss  carryforwards and the elimination of
the valuation  allowance.  The Company recorded a net deferred tax asset of $3.1
million at December 31, 1996.

Outlook

                  This Outlook  section and the Liquidity and Capital  Resources
section below contain forward-looking  statements.  The Company's actual results
may  differ   significantly   from  the  results  discussed  in  forward-looking
statements.  Factors  that could cause the  Company's  future  results to differ
materially  from the  expectations  described  here  include the response of the
Company's  competitors to the Company's business strategy,  market acceptance of
CRJ service to new destinations,  the cost of fuel, the weather, satisfaction of
regulatory requirements and general economic and industry conditions.

     A central  element of the Company's  business  strategy is expansion of its
aircraft  fleet. At December 31, 1997, the Company had commitments to acquire 18
50-seat CRJs,  five of which were delivered in 1997 and one in January 1998. The
introduction  of these  aircraft  will expand the  Company's  business  into new
markets.  In general,  service to new markets may result in increased  operating
expenses that may not be immediately offset by increases in operating revenues.

Liquidity and Capital Resources

                  The Company's balance sheet improved significantly during 1997
compared  to 1996.  As of  December  31,  1997,  the  Company  had cash and cash
equivalents  of $39.2 million and working  capital of $45.2 million  compared to
$21.5 million and $17.8 million respectively as of December 31, 1996. During the
year ended December 31, 1997, cash and cash equivalents increased $17.7 million,
reflecting net cash provided by operating  activities of $21.3 million, net cash
used in investing activities of $55.2 million (related to deposits for the CRJs,
purchases of equipment  and  increases in short term  investments)  and net cash
provided  by  financing  activities  of  $51.6  million.  Net cash  provided  by
financing activities increased principally due to the receipt of net proceeds of
$55.6  million  in July 1997 from the  issuance  of  convertible  notes due 2004
partially  offset by the $16.9 million  purchase of the  Company's  common stock
from British Aerospace in July 1997.

                  As of  December  31,  1996  the  Company  had  cash  and  cash
equivalents  of $21.5 million and working  capital of $17.8 million  compared to
$8.4 million and $4.6 million respectively as of December 31, 1995. During 1996,
cash and cash equivalents increased $13.1 million,  reflecting net cash provided
by operations of $20.1  million,  net cash used in investing  activities of $2.2
million (related to purchases or spare parts and equipment) and net cash used in
financing  activities of $4.9 million  (primarily  related to the  redemption of
preferred stock and payments on long-term debt and capital lease obligations).

         Other Financing

                  The  Company  has  an  asset-based  lending  agreement  with a
financial  institution  that provides the Company with a line of credit of up to
$20 million, depending on the amount of assigned ticket receivables.  Borrowings
under the line of credit can  provide  the  Company a source of working  capital
until proceeds from ticket coupons are received.  The line is  collateralized by
all of the Company's  receivables  and there were no  borrowings  under the line
during  1997.  The  Company  pledged  $7.7  million  of this  line of  credit as
collateral  to secure  letters  of credit  issued on behalf of the  Company by a
financial institution.

                  In June 1997, the Industrial  Development Authority of Loudoun
County,  Virginia  ("IDA")  approved a $9.4 million tax exempt bond  issuance in
connection with the Company's proposed construction of a maintenance facility at
Washington-Dulles.  The  Company  has paid  approximately  $500,000 to cover the
costs  associated  with  furnishing and equipping the new facility.  These bonds
were issued under a variable interest rate structure for a twenty-five year term
including  a  requirement  for  a  monthly  sinking  fund  provision,   and  are
collateralized  by a $9.6  million  letter  of  credit  issued  on behalf of the
Company by a financial  institution.  The letter of credit is  collateralized by
the  Company's  leasehold  deed of trust on the  maintenance  facility  and $4.9
million of the  Company's  line of credit.  The Company will be obligated to pay
rent for the facility and the underlying land leasehold, the proceeds from which
the IDA will make the required  interest  and sinking fund  payments on the bond
obligation.  In the  event of a  default,  the  Company  would be  obligated  to
reimburse  the  financial  institution  to the  maximum  amount of the letter of
credit. Annual rent is subject to escalation every five years. In February 1998,
the Company occupied this building and began paying rent.

                  On July 2, 1997,  the  Company  issued $50  million  aggregate
principal  amount of 7%  Convertible  Subordinated  Notes due July 1, 2004 ("the
Notes").  The Company  received  net  proceeds of  approximately  $48.3  million
related to the sale of the Notes.  In addition,  the Company granted the initial
purchasers  a thirty day option to purchase  up to an  additional  $7.5  million
aggregate principal amount of the Notes solely to cover over-allotments. On July
18, 1997,  the Company  received  net  proceeds of $7.3  million  related to the
exercise of this option. The net proceeds of the Note offering have been used to
support the  introduction of the Company's  regional jet fleet,  repurchase 1.46
million shares of the Company's Common Stock from British Aerospace as described
below, retire higher interest rate debt and for general corporate purposes.

                  The Notes are convertible into shares of Common Stock,  unless
previously  redeemed or  repurchased,  at a  conversion  price of $18 per share,
subject to certain adjustments.  Interest on the Notes is payable on April 1 and
October 1 of each year, commencing October 1, 1997. The Notes are not redeemable
by the Company until July 1, 2000. Thereafter,  the Notes will be redeemable, at
any time,  on at least 15 days notice at the option of the Company,  in whole or
in part, at the redemption prices set forth in the Indenture dated July 2, 1997,
in each case, together with accrued interest.

                  In  January  1998,  $5.9  million  face  amount of Notes  were
converted by several holders into 330,413 shares of the Company's Common Stock.

                  On March 3, 1998,  the Company  notified  holders of the Notes
that the Company  was  temporarily  reducing  the  conversion  price in order to
induce the Note  holders to convert  their  Notes into  Common  Stock.  The Note
holders have until April 8, 1998 to accept the Company's inducement.

     In April  1997,  the  Company  executed  a short term  promissory  note for
deposits  totaling  $11  million  related to the  acquisition  of the CRJs.  The
promissory  note was paid in full on July 2, 1997 from the net  proceeds  of the
Notes.
      
                  In July 1997, the Company  repurchased  1.46 million shares of
the  Company's  Common  Stock from British  Aerospace  for  approximately  $16.9
million from the net proceeds of the sale of the Notes as described  above.  The
stock was  repurchased  at a 22.5%  discount from the average of the closing bid
prices during the period June 24 through June 30, 1997.

     During July 1997,  the Company  retired $3.1 million of other high interest
rate debt from the proceeds of the Notes.  In January 1998, the Company  retired
an additional $1.4 million in capital lease obligations.

                  In September 1997,  approximately $112 million of pass through
certificates were issued in a private placement by separate pass through trusts,
which  purchased  with the proceeds,  equipment  notes (the  "Equipment  Notes")
issued in connection  with (i)  leveraged  lease  transactions  relating to four
J-41s and six CRJs (delivered or expected to be delivered),  all of which are or
will be leased to the Company (the "Leased Aircraft"), and (ii) the financing of
four J-41s owned by the Company  (the "Owned  Aircraft").  The  Equipment  Notes
issued  with  respect  to the Owned  Aircraft  are  direct  obligations  of ACA,
guaranteed by ACAI and are included in the accompanying  consolidated  financial
statements.  The Equipment  Notes issued with respect to the Leased Aircraft are
not obligations of ACA or guaranteed by ACAI.

                  With respect to one CRJ leased aircraft,  at December 31, 1997
(the  "Prefunded  Aircraft"),  the proceeds from the sale of the Equipment Notes
were  deposited  into  collateral  accounts,  to be released at the closing of a
leveraged  lease related to the Prefunded  Aircraft.  In January 1998, an equity
investor  purchased  this  aircraft and entered into a leveraged  lease with the
Company and the collateral accounts were released.

         Other Commitments

                  In July 1997,  the Company  entered  into a series of interest
rate swap contracts in the amount of $39.8  million.  The swaps were executed by
purchasing  six  contracts  maturing  between  March  and  September  1998  with
Bombardier,  Inc. as the counter  party.  The interest rate hedge is designed to
limit approximately 50% of the Company's exposure to interest rate changes until
permanent  financing  for its second six CRJ  aircraft,  which are scheduled for
delivery between March and September 1998, is secured. At December 31, 1997, had
all contracts settled on that date, the Company would have been obligated to pay
the counter party approximately $1.4 million.

                  In January  1998,  the  Company  entered  into a  contract  to
purchase fuel from United Aviation Fuels  Corporation  ("UAFC"),  a wholly-owned
subsidiary of United Airlines during the period February through September 1998.
The Company has  committed to purchase  33,000  barrels of fuel per month during
the term of this contract at a delivered  price  excluding  taxes and into plane
fees of 52.2 cents per gallon.  In March 1998, the Company extended the contract
through  December 1998 committing to purchase 33,000 barrels per month,  October
through  December,  at a delivered  price excluding taxes and into plane fees of
50.35  cents per  gallon.  Fuel  purchased  under  this  arrangement  represents
approximately 46% of the Company's anticipated 1998 fuel requirements.

                  The  Company has  started to review its  computer  systems and
application  programs for year 2000  compliance.  The Company  believes that the
cost to modify any of its non-compliant  systems or applications will not have a
material effect on its financial position or results of its operations. However,
the Company can not give any  assurances  that the systems of other parties upon
which the Company  must rely,  will be year 2000  compliant  on a timely  basis.
Examples of systems operated by others that the Company may use and or rely upon
are:  FAA Air Traffic  Control,  Computer  Reservation  Systems for travel agent
sales  and  United  Airlines'  reservation,  passenger  check  in and  ticketing
systems.  The  Company's  business,   financial  condition  and  or  results  of
operations could be materially  adversely affected by the failure of its systems
and applications or those operated by others.

         Aircraft

                  The Company has  significant  lease  obligations  for aircraft
that are  classified  as operating  leases and  therefore  are not  reflected as
liabilities on the Company's  balance sheet.  The remaining terms of such leases
range from less than one year to sixteen and a half years.  The Company's  total
rent expense in 1997 under all  non-cancelable  aircraft  operating  leases with
remaining  terms of more than one year was  approximately  $29.2 million.  As of
December 31, 1997,  the  Company's  minimum  rental  payments for 1998 under all
non-cancelable  aircraft  operating leases with remaining terms of more than one
year were approximately $36 million.

                  As of March 4,  1998,  the  Company  had a total of 17 CRJs on
order from Bombardier,  Inc., in addition to the six delivered, and held options
for 25 additional  CRJs. The initial order for 12 CRJs and 36 options was placed
on January  28,  1997.  Options  were  exercised  on  November  20,  1997 for an
additional six firm and six conditional  CRJ deliveries.  On March 4, 1998, five
of the six  conditional  orders were  converted to firm orders and the remaining
one was  restored to option  status.  The first five CRJs were  delivered in the
third and fourth  quarters  of 1997.  Two  additional  CRJs have been  delivered
during  the  first  quarter  1998  under  operating  leases.   Seven  additional
deliveries are scheduled in 1998 and nine deliveries are scheduled in 1999 which
the Company is obligated to purchase and finance (including leveraged leases) at
an approximate capital cost of $296 million.

                  On February  23, 1997,  the Company  entered into an agreement
with Aero  International  (Regional) (the "BA J-41 Agreement") to acquire 12 new
J-41 aircraft,  and into a related agreement that gave the Company permission to
refinance through third parties up to fifteen previously delivered J-41 aircraft
that were under leases supported by British Aerospace.  The new aircraft were to
be  delivered  under  long-term  leases with  British  Aerospace,  but were also
eligible for third party financing.  Four of the new aircraft had been delivered
as of May 29, 1997,  when British  Aerospace  announced  that it would no longer
manufacture  the J-41 as part of its regular  product line. On July 2, 1997, the
Company  and  British  Aerospace  amended  the BA J-41  Agreement  to cancel any
further  deliveries of J-41s pursuant to the BA J-41  Agreement.  As part of the
amended BA J-41 Agreement, the Company received certain manufacturer credits and
support.  The  amendment  also  provides  that  British  Aerospace  will provide
additional asset value support for such contemplated third party financings.

                  During 1997, the Company  completed third party  financings of
eighteen  J-41 aircraft as follows:  On August 1, 1997,  three new J-41s through
leveraged  leases with a third  party;  on September  15,  1997,  two used J-41s
through single  investor  leases with a third party; on September 26, 1997, four
used  J-41s  through  leveraged  leases  with a third  party as part of the pass
through  certificates  as described  above;  on September 26, 1997,  one new and
three used J-41s  purchased by the Company with debt as part of the pass through
certificates;  on September  30, 1997,  two used J-41s through  single  investor
leases with a third party,  and on December 30, 1997,  three used J-41s  through
single investor leases with a third party. All of these aircraft were already on
lease to the Company at the time of closing, and prior leases were terminated as
part of these transactions.  As compared to the prior leases, these refinancings
have resulted in reduced payment obligations,  shorter lease terms, and improved
return  conditions.  On February  13,  1998,  the Company  entered into a single
investor lease with a third party for the last J-41 eligible for refinancing.

                  In  November  1997,  the  Company  entered  into a  lease  and
purchase agreement with Aero International (Regional) for the acquisition of one
additional  new J-41.  The  Company  will be  required  to arrange  third  party
financing  of this  aircraft,  or to  purchase  it  outright,  during the second
quarter  of 1998,  subject  to the  aircraft  being  properly  modified  by Aero
International.

                  In  order  to  ensure  the  highest  level  of  safety  in air
transportation,  the FAA has authority to issue maintenance directives and other
mandatory orders relating to, among other things, inspection of aircraft and the
mandatory  removal and  replacement of parts that have failed or may fail in the
future. In addition, the FAA from time to time amends its regulations which such
amended regulations may impose additional regulatory burdens on the Company such
as the  installation  of  new  safety-related  items  (collision  and  windshear
avoidance systems and enhanced flight data recorders).  Depending upon the scope
of the FAA's order and amended  regulations,  these  requirements  may cause the
Company to incur substantial, unanticipated expenses.

         Capital Equipment and Debt Service

                  In  1998  the   Company   anticipates   capital   spending  of
approximately  $60 million  consisting  primarily of $40 million to own two CRJs
and one J-41 aircraft,  $17 million for spare parts, engines and equipment,  and
$3 million for other capital  assets.  The Company  anticipates  that it will be
able to arrange  financing for the aircraft and spares  through a combination of
manufacturer and third party financing arrangements on favorable terms, although
there is no certainty  that such  financing will be available or in place before
the  commencement  of  deliveries.  The Company  currently  has an  agreement in
principle  from a third party for  approximately  $126 million in debt financing
associated with the purchase of nine CRJ's to be delivered in 1998 and 1999.

                  Debt service for 1998 is estimated  to be  approximately  $9.2
million  reflecting  increased  borrowings  related  to the  issuance  of the 7%
Convertible  Subordinated  Notes and the  purchase  of four J-41  aircraft.  The
foregoing  amount does not include  additional debt that may be required for the
financing of the CRJ spare parts and engines.

                  The  Company   believes   that,  in  the  absence  of  unusual
circumstances,  its cash flow from operations,  the accounts  receivable  credit
facility, and other available equipment financing will be sufficient to meet its
working capital needs, capital  expenditures,  and debt service requirements for
the next twelve months.

         Inflation

                  Inflation  has  not had a  material  effect  on the  Company's
operations.

         Recent Accounting Pronouncements

                  In  July  1997,  the  Financial   Accounting  Standards  Board
("FASB")  issued  Statement No. 130 ("SFAS No. 130"),  "Reporting  Comprehensive
Income",  which requires that comprehensive income and the associated income tax
expense or benefit be reported in financial  statements with the same prominence
as other financial  statements with an aggregate amount of comprehensive  income
reported in that same  financial  statement.  "Comprehensive  Income"  refers to
revenues,  expenses,  gains and losses  that under GAAP are not  included in net
income.  The impact of SFAS No. 130 will not change  levels of net  income,  but
will result in new disclosure requirements for the Company.

                  In July 1997,  the FASB also issued  Statement  No. 131 ("SFAS
No. 131"), "Disclosures About Segments of an Enterprise and Related Information"
which  requires  disclosure  for each  segment,  for which  the chief  operating
decision  maker  organizes  the  company  for  making  operating  decisions  and
assessing  performance.  Reportable segments are based on products and services,
geography,  legal  structure,  management  structure  and any  manner  in  which
management  disaggregates  the  company.  The  impact of SFAS No.  131 will also
result in new disclosure requirements for the Company.

                  Recently,   the  American   Institute   of  Certified   Public
Accountants  issued a proposed  statement of position on accounting for start-up
costs,  including  preoperating  costs related to the  introduction of new fleet
types by airlines. The proposed accounting guidelines would require companies to
expense  start-up  costs as incurred.  The FASB  recently  approved the proposed
guidelines,  and they will take effect for fiscal years beginning after December
15,  1998.  The Company  has  deferred  certain  start-up  costs  related to the
introduction  of the CRJs and is amortizing  such costs to expense  ratably over
four years.  The Company  will be  required to expense any  unamortized  amounts
remaining as of January 1, 1999. The Company estimates the remaining unamortized
balance  for  deferred  start-up  costs will be  approximately  $1.4  million on
January 1, 1999.



<PAGE>


Item 8.           Consolidated Financial Statements

         INDEX TO THE CONSOLIDATED FINANCIAL STATEMENTS
                                                                           Page

Independent Auditors' Report for the year ended December 31, 1997

Report of  Independent  Certified  Public  Accountants  for the 
years ended December 31, 1995 and 1996 34 December 31, 1995 and 1996

Consolidated Balance Sheets as of December 31, 1996 and 1997

Consolidated  Statements  of  Operations  for the years ended 
December 31, 1995, 1996 and 1997

Consolidated  Statements  of  Stockholders'  Equity  for  the  
years  ended December 31, 1995, 1996 and 1997

Consolidated  Statements  of Cash Flows for the years  ended
December  31, 1995, 1996 and 1997 38 December 31, 1995, 1996 and 
1997

Notes to Consolidated  Financial  Statements 






<PAGE>


Independent Auditors' Report


The Board of Directors and Stockholders
Atlantic Coast Airlines, Inc.

We have audited the  accompanying  consolidated  balance sheet of Atlantic Coast
Airlines,  Inc.  and  Subsidiary  as of  December  31,  1997,  and  the  related
consolidated statements of operations,  stockholders' equity, and cash flows for
the  year  then  ended.   These  consolidated   financial   statements  are  the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these consolidated financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards  require that we plan and perform the audit to obtain reasonable
assurance   about  whether  the  financial   statements  are  free  of  material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly,  in all material  respects,  the  financial  position of Atlantic  Coast
Airlines,  Inc. and  Subsidiary as of December 31, 1997 and the results of their
operations  and their  cash  flows for the year then  ended in  conformity  with
generally accepted accounting principles.


Washington, D.C.                                   KPMG Peat Marwick LLP
January 28, 1998, except as to note 17,
which is as of March 4, 1998


<PAGE>


Report of Independent Certified Public Accountants


Board of Directors and Stockholders
Atlantic Coast Airlines, Inc.

We have audited the  accompanying  consolidated  balance sheet of Atlantic Coast
Airlines, Inc. and Subsidiary, as of December 31, 1996 and 1995, and the related
consolidated statements of operations,  stockholders' equity, and cash flows for
each of the three years in the period ended December 31, 1996.  These  financial
statements   are  the   responsibility   of  the   Company's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards  require that we plan and perform the audit to obtain reasonable
assurance   about  whether  the  financial   statements  are  free  of  material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly,  in all material  respects,  the  financial  position of Atlantic  Coast
Airlines,  Inc. and Subsidiary at December 31, 1996 and 1995, and the results of
their  operations and their cash flows for each of the three years in the period
ended  December  31,  1996 in  conformity  with  generally  accepted  accounting
principles.


                                                   BDO Seidman, LLP

Washington, D.C.
January 24, 1997, except for Note 18, The date which is May 29, 1997




<PAGE>
<TABLE>


                                                                                                Atlantic Coast Airlines, Inc.
                                                                                                               and Subsidiary

                                                                                                  Consolidated Balance Sheets



(In thousands, except for share data and par values)
December 31,                                                                               
<CAPTION>
                                                                                     
                                                                                     1996                           1997

- ---------------------------------------------------------------------------------------------------------------------------
<S>                                                                                  <C>                        <C>    

Assets
Current:
    Cash and cash equivalents                                                                $  21,470          $   39,167
    Short term investments                                                                           -              10,737
    Accounts receivable, net                                                                    15,961              21,621
    Expendable parts and fuel inventory, net                                                     1,759               2,477
    Prepaid expenses and other current assets                                                    2,554               2,855
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total current assets                                                                    41,744              76,857
Property and equipment at cost, net of accumulated depreciation and
   amortization                                                                                 16,157              40,638
Preoperating costs, net of accumulated amortization                                                225               2,004
Intangible assets, net of accumulated amortization                                               2,882               2,613
Deferred tax asset                                                                               3,140                 688
Debt issuance costs, net of accumulated amortization                                                 -               3,051
Aircraft deposits                                                                                  570              19,040
Other assets                                                                                        40               4,101
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total assets                                                                         $  64,758           $ 148,992
- ------------------------------------------------------------------------------------  -----------------  ------------------
Liabilities and Stockholders' Equity
Current:
    Accounts payable                                                                         $   3,770         $     4,768
    Current portion of long-term debt                                                            1,319               1,851
    Current portion of capital lease obligations                                                 1,497               1,730
    Accrued liabilities                                                                         17,376              23,331
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total current liabilities                                                               23,962              31,680
Long-term debt, less current portion                                                             2,407              73,855
Capital lease obligations, less current portion                                                  3,266               2,290
Deferred credits, net                                                                              486               6,362
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total liabilities                                                                       30,121             114,187
- ------------------------------------------------------------------------------------  -----------------  ------------------
Stockholders' equity:
  Preferred Stock: $.02 par value per share; shares authorized
    5,000,000; no shares issued or outstanding in 1996 or 1997                                       -                   -
  Common stock: $.02 par value per share; shares authorized 15,000,000; shares
    issued 8,498,910 in 1996 and 8,739,507 in 1997; shares outstanding 8,486,410
    in 1996 and 7,267,007 in 1997                                                                  170                 175
  Class A common stock: nonvoting; par value; $.02 stated value per share; shares
    authorized 6,000,000; no shares issued or outstanding                                            -                   -
  Additional paid-in capital                                                                    37,689              40,296
  Less:  Common stock in treasury, at cost, 12,500 shares in 1996 and 1,472,500
      shares in 1997                                                                              (125)            (17,069)
  Retained earnings (deficit)                                                                   (3,097)             11,403
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total Stockholders' Equity                                                              34,637              34,805
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Total Liabilities and Stockholders' Equity                                           $  64,758           $ 148,992
- ------------------------------------------------------------------------------------  -----------------  ------------------
        Commitments and Contingencies
- ------------------------------------------------------------------------------------  -----------------  ------------------
                                                                                                                    
     See accompanying notes to consolidated financial statements.
</TABLE>

<PAGE>
<TABLE>


                                                                                                      Atlantic Coast Airlines, Inc.
                                                                                                                     and Subsidiary
                                                                                              Consolidated Statements of Operations


(In thousands, except for per share data)
Years ended December 31,
<CAPTION>

                                                                                1995              1996              1997
- ---------------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>               <C>             <C>   

Operating revenues:
  Passenger                                                                 $ 153,918         $ 179,370       $  202,540
  Other                                                                         3,050             3,114            2,904
- ---------------------------------------------------------------------------------------------------------------------------
         Total operating revenues                                             156,968           182,484          205,444
- ---------------------------------------------------------------------------------------------------------------------------
Operating expenses:
  Salaries and related costs                                                   40,702            44,438           49,661
  Aircraft fuel                                                                13,303            17,124           17,766
  Aircraft maintenance and materials                                           15,252            16,841           16,860
  Aircraft rentals                                                             25,947            29,137           29,570
  Traffic commissions and related fees                                         25,938            28,550           32,667
  Depreciation and amortization                                                 2,240             2,846            3,566
  Other                                                                        21,262            23,711           26,411
  Restructuring charges (reversals)
                                                                           (521)             (426)               -
- ---------------------------------------------------------------------------------------------------------------------------
         Total operating expenses                                             144,123           162,221          176,501
Operating income                                                               12,845            20,263           28,943
- ---------------------------------------------------------------------------------------------------------------------------
Other income (expense):
  Interest expense
                                                                          (1,802)           (1,013)           (3,450)
  Interest income                                                                  66               341            1,284
  Other income                                                                    181                17               62
- ---------------------------------------------------------------------------------------------------------------------------
         Total other expense
                                                                          (1,555)             (655)           (2,104)
- ---------------------------------------------------------------------------------------------------------------------------
             Income before income tax provision (benefit)
                 and extraordinary                                             11,290            19,608           26,839
item
  Income tax provision (benefit)                                                                    450           12,339
                                                                          (1,212)
- ---------------------------------------------------------------------------------------------------------------------------
             Income before extraordinary item                                  12,502            19,158           14,500
  Extraordinary Item                                                              400                 -                -
- ---------------------------------------------------------------------------------------------------------------------------
Net income                                                                   $ 12,902         $  19,158       $   14,500
- ---------------------------------------------------------------------------------------------------------------------------
Income per share:
         Basic
                    Income before extraordinary item                            $1.46             $2.25            $1.85
                    Extraordinary item                                           0.05                 -                -
                                                                      -----------------------------------------------------
                    Net income                                                  $1.51             $2.25            $1.85
                                                                      =====================================================
         Diluted
                    Income before extraordinary item                            $1.29             $2.15            $1.61
                    Extraordinary item                                           0.04                 -                -
                                                                      -----------------------------------------------------
                    Net income                                                  $1.33             $2.15            $1.61
                                                                      =====================================================

   Weighted average shares used in computation:
          Basic                                                                 8,342             8,481            7,824
          Diluted                                                               9,871             8,920            9,756
- ---------------------------------------------------------------------------------------------------------------------------
                                                                                                         
See accompanying notes to consolidated financial statements.
</TABLE>


<PAGE>
<TABLE>


                                                                                                       Atlantic Coast Airlines, Inc.
                                                                                                                      and Subsidiary

                                                                                     Consolidated Statements of Stockholders' Equity



(In thousands, except for share data)
<CAPTION>
                                               Common Stock         Additional         Treasury Stock             Retained
                                         ----------------------------Paid-In    -----------------------------     Earnings
                                                                     Capital                                      (Deficit)
                                              Shares       Amount                        Shares    Amount
- ---------------------------------------- ------------------------- ------------ ---------------------------- ------------------
<S>                                      <C>           <C>         <C>          <C>             <C>          <C>

Balance, December 31, 1994                   8,324,470      $  166     $ 36,703         12,500       $ (125)     $   (34,822)
                                                                                       
Exercise of common stock options                31,941           1           71             -            -                -
Preferred stock dividends declared                   -           -            -             -            -              (335)
Net Income                                           -           -            -             -            -            12,902
                                                                                                                         
- ---------------------------------------- ------------- ----------- ------------ -------------- ------------- -----------------
Balance, December 31, 1995                   8,356,411         167       36,774         12,500         (125)         (22,255)
Exercise of common stock options               142,499           3          351            -              -               -
Tax benefit of stock option exercise                 -           -          564            -              -               -
Net Income                                           -           -            -            -              -           19,158
                                                                                                                        
- ---------------------------------------- ------------- ----------- ------------ -------------- ------------- -----------------
Balance December 31, 1996                    8,498,910         170       37,689         12,500         (125)          (3,097)
Exercise of common stock options               240,597           5        1,250            -              -               -
Tax benefit of stock option exercise                 -           -        1,357            -              -               -
Purchase of treasury stock                           -           -            -      1,460,000      (16,944)              -
Net Income                                           -           -            -            -              -           14,500
                                                                                                                      
- ---------------------------------------- ------------- ----------- ------------ -------------- ------------- -----------------
Balance December 31, 1997                    8,739,507    $    175     $ 40,296      1,472,500    $ (17,069)      $   11,403
                                                               
- ---------------------------------------- ------------- ----------- ------------ -------------- ------------- -----------------
                                                                                                          
See accompanying notes to consolidated financial statements.
</TABLE>


<PAGE>
<TABLE>


                                                                                                       Atlantic Coast Airlines, Inc.
                                                                                                                      and Subsidiary

                                                                                               Consolidated Statements of Cash Flows
(In thousands)
Years ended December 31,
<CAPTION>
                                                                            1995               1996                     1997
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                                                         <C>                <C>                  <C>    

Cash flows from operating activities:
    Net income                                                                $ 12,902           $ 19,158           $ 14,500
    Adjustments to reconcile net income (loss) to net cash provided
         by   (used in) operating activities:
          Extraordinary gain                                                     (400)                  -                  -
          Depreciation and amortization                                          1,815              2,434              3,111
          Amortization of intangibles and preoperating costs                       425                412                455
          Provision for uncollectible accounts                                     229                387                168
          Provision for inventory obsolescence                                     120                 50                 63
          Amortization of deferred credits                                           -               (27)              (243)
          Amortization of debt issuance costs                                        -                  -                181
          (Increase) decrease in deferred tax asset                            (1,500)            (1,640)              2,452
          Net (gain) loss on disposal of fixed assets                              (7)                  1                450
          Amortization of debt discount and finance                                  7                 46                 76
         costs
          Gain on disposal of                                                    (177)                  -                  -
         slots
    Changes in operating assets and liabilities:
              Accounts receivable                                              (1,169)            (1,741)            (5,829)
              Expendable parts and fuel inventory                                  686                 41              (781)
              Prepaid expenses and other current assets                          2,814              (796)                403
              Preoperating costs                                                     -                  -            (2,057)
              Other assets                                                          62                  -                  -
              Accounts payable                                                 (1,393)                238                998
              Accrued liabilities                                                1,259              1,590              7,313
                                                                      ---------------------------------------------------------
              Net cash provided by operating activities                         15,673             20,153             21,260
Net cash provided by (used in) operating  activities  Cash flows from  investing
activities:
   Purchase of property and equipment                                          (4,260)            (2,128)           (26,005)
   Proceeds from sales of fixed assets                                           1,916                  -                  -
   Purchase of short term investments                                                -                  -           (10,737)
   Proceeds from sale of intangible assets                                         375                  -                  -
   Payments for aircraft and other deposits                                          -               (61)           (18,447)
                                                                      ---------------------------------------------------------
              Net cash used in investing activities                            (1,969)            (2,189)           (55,189)
Cash flows from financing activities:
   Proceeds from issuance of long-term debt                                      4,210                486             75,220
   Payments of long-term debt                                                  (4,769)            (1,234)            (3,241)
   Payments of capital lease obligations                                         (689)            (1,171)            (2,258)
   Net decrease in lines of credit                                             (6,356)                  -                  -
   Proceeds from receipt of deferred credits and other                               -                513                809
   Deferred financing costs                                                       (66)              (239)            (3,215)
   Payment of convertible preferred stock dividend                                   -              (335)                  -
   Redemption of convertible preferred stock                                         -            (3,825)                  -
   Proceeds from exercise of stock options                                          72                915              1,255
   Purchase of treasury stock                                                        -                  -           (16,944)
              Net cash (used in) provided by financing activities              (7,598)            (4,890)             51,626
Net cash (used in) provided by financing activities
Net increase in cash and cash equivalents                                        6,106             13,074             17,697
Cash and cash equivalents, beginning of year                                     2,290              8,396             21,470
                                                                      ---------------------------------------------------------
Cash and cash equivalents, end of year                                        $  8,396           $ 21,470           $ 39,167
- -------------------------------------------------------------------------------------------------------------------------------
                                                                                                                
See accompanying notes to consolidated financial statements.
</TABLE>

<PAGE>





                                                  Atlantic Coast Airlines, Inc.
                                                                 and Subsidiary

                                     Notes to Consolidated Financial Statements
- -------------------------------------------------------------------------------
39


1.   Summary of Accounting     (a)   Basis of Presentation
     Policies
                                     The  accompanying   consolidated  financial
                                     statements include the accounts of Atlantic
                                     Coast  Airlines,   Inc.  ("ACAI")  and  its
                                     wholly-owned  subsidiary,   Atlantic  Coast
                                     Airlines    ("ACA"),     together,     (the
                                     "Company").  All  significant  intercompany
                                     accounts   and   transactions   have   been
                                     eliminated in consolidation. As of December
                                     31, 1997,  the Company  operated in the air
                                     transportation industry providing scheduled
                                     service for  passengers to 40  destinations
                                     in 17 eastern  states of the United States.
                                     All of the Company's  flights are currently
                                     operated  under  a code  sharing  agreement
                                     with United Airlines,  Inc.  ("United") and
                                     are identified as United Express flights in
                                     computer reservation systems.

                               (b)   Cash, Cash Equivalents and Short-Term 
                                     Investments

                                     The Company  considers  investments with an
                                     original  maturity of three  months or less
                                     when  purchased  to  be  cash  equivalents.
                                     Investments   with  an  original   maturity
                                     greater  than three  months are  considered
                                     short-term   investments.   All  short-term
                                     investments  are considered to be available
                                     for  sale.  Due  to  the  short  maturities
                                     associated with the Company's  investments,
                                     the amortized cost approximates fair market
                                     value. Accordingly,  no adjustment has been
                                     made to record unrealized holding gains and
                                     losses.

                               (c)   Airline Revenues

                                     Passenger  fares  and  cargo  revenues  are
                                     recorded as operating  revenues at the time
                                     transportation  is  provided.  The value of
                                     unused   passenger   tickets  sold  by  the
                                     Company is included in current liabilities.
                                     Accounts   receivable  are  stated  net  of
                                     allowances  for  uncollectible  accounts of
                                     approximately   $550,000,    $287,000   and
                                     $269,000 at  December  31,  1995,  1996 and
                                     1997,  respectively.   Amounts  charged  to
                                     costs  and   expenses   for   uncollectible
                                     accounts  in  1995,   1996  and  1997  were
                                     $229,000,     $387,000     and     $168,000
                                     respectively.    Write-off    to   accounts
                                     receivable were none, $650,000 and $186,000
                                     in 1995, 1996 and 1997, respectively.

                                     The   Company    participates   in   United
                                     Airlines,  Inc.'s  ("United")  Mileage Plus
                                     frequent  flyer  program.  The Company does
                                     not  accrue  for   incremental   costs  for
                                     mileage   accumulation   relating  to  this
                                     program  because the Company  believes such
                                     costs are immaterial. Incremental costs for
                                     awards  redeemed on the  Company's  flights
                                     are expensed as incurred.

                               (d)   Concentrations of Credit Risk

                                     The   Company   provides   commercial   air
                                     transportation   in  the   eastern   United
                                     States.  Substantially all of the Company's
                                     passenger  tickets  are sold by  other  air
                                     carriers.  The  Company  has a  significant
                                     concentration  of its  accounts  receivable
                                     with other air carriers with no collateral.
                                     At  December  31,  1996 and 1997,  accounts
                                     receivable   from  air   carriers   totaled
                                     approximately   $14.3   million  and  $18.7
                                     million,   respectively.    Such   accounts
                                     receivable   serve  as   collateral   to  a
                                     financial  institution  in connection  with
                                     the Company's  line of credit  arrangement.
                                     Of  the  total  amount,  approximately  $11
                                     million and $14.8  million at December  31,
                                     1996 and 1997, respectively,  were due from
                                     United.  Historically,  accounts receivable
                                     losses have been insignificant.

                               (e)   Risks and Uncertainties

                                     The airline industry is highly  competitive
                                     and   volatile.    The   Company   competes
                                     primarily  with  other  air  carriers  and,
                                     particularly  with  respect to its  shorter
                                     flights,   with   ground    transportation.
                                     Airlines  primarily  compete  in  areas  of
                                     pricing,  scheduling and type of equipment.
                                     The  Company's   operations  are  primarily
                                     dependent upon business-related  travel and
                                     are   not   subject   to   wide    seasonal
                                     fluctuation. However, some seasonal decline
                                     does occur  during  portions  of the winter
                                     months due to lesser demand. The ability of
                                     the   Company   to  compete   with   ground
                                     transportation   and  other  air   carriers
                                     depends  upon  public   acceptance  of  its
                                     aircraft and the  provision of  convenient,
                                     frequent  and   reliable   service  to  its
                                     markets at reasonable rates.

                                     The Company  operates  under a code-sharing
                                     agreement  with  United,  which  expires on
                                     March 31, 1999.  The  agreement  allows the
                                     Company to operate under  United's  colors,
                                     utilize  the  "United   Express"  name  and
                                     identify   its   flights   using   United's
                                     designator  code. The Company believes that
                                     its relationship with United  substantially
                                     enhances   its   ability  to  compete   for
                                     passengers.   The  loss  of  the  Company's
                                     affiliation   with  United   could  have  a
                                     material  adverse  effect on the  Company's
                                     business.

                                     The United Express  Agreements  require the
                                     Company  to  obtain  United's   consent  to
                                     operate   service  between  city  pairs  as
                                     "United    Express".    If   the    Company
                                     experiences  net  operating  expenses  that
                                     exceed   revenues  for  three   consecutive
                                     months on any required  route,  the Company
                                     may withdraw  from that route if United and
                                     the  Company  are  unable to  negotiate  an
                                     alternative  mutually  acceptable  level of
                                     service for that route.  The United Express
                                     Agreements  also  require  the  Company  to
                                     obtain  United's  approval if it chooses to
                                     enter into  code-sharing  arrangements with
                                     other carriers,  but do not prohibit United
                                     from  competing,   or  from  entering  into
                                     agreements  with other  airlines  who would
                                     compete,  on routes  served by the Company.
                                     The  United   Express   Agreements  may  be
                                     canceled  if  the  Company  fails  to  meet
                                     certain   financial  tests  or  performance
                                     standards  or  fails  to  maintain  certain
                                     minimum  flight  frequency  levels,  events
                                     which the Company,  based on  experience to
                                     date, believes to be unlikely.

                                     The Company's pilots are represented by the
                                     Airline Pilots  Association  ("ALPA"),  its
                                     flight  attendants  by the  Association  of
                                     Flight   Attendants   ("AFA"),    and   its
                                     mechanics   by   the   Aircraft   Mechanics
                                     Fraternal Association ("AMFA").

                                     The ALPA  collective  bargaining  agreement
                                     was  amended  on  February  26,  1997.  The
                                     agreement   is  for  three   years  and  is
                                     amendable  on February  28,  2000.  The new
                                     contract  modifies work rules to allow more
                                     flexibility,  introduces  regional  jet pay
                                     rates,   and  transfers   pilots  into  the
                                     Company's employee benefit plans.

                                     On March 11,  1994,  AMFA was  certified by
                                     the National Mediation Board (the "NMB") as
                                     the  collective  bargaining  representative
                                     elected by mechanics and related  employees
                                     of the  Company.  The Company and AMFA have
                                     been  attempting  to  negotiate  an initial
                                     contract  under  federal   mediation  since
                                     December  1994,  but have so far  failed to
                                     reach agreement. The NMB has indicated that
                                     it   is  in   favor   of   continuing   the
                                     negotiations,  and the Company  anticipates
                                     participating in further negotiations.

                                     If, at some  point,  the NMB should  decide
                                     that the parties were deadlocked,  then the
                                     NMB could  declare an impasse  along with a
                                     thirty  day  cooling  off  period.  At  the
                                     conclusion  of that period if an  agreement
                                     had not been  reached,  AMFA would have the
                                     authority  to  use  self  help,  up to  and
                                     including the right to strike.

                                     The Company's  contract with the AFA became
                                     amendable on April 30, 1997. In March 1998,
                                     a tentative  agreement  between the Company
                                     and  AFA  was  rejected  by a  vote  of the
                                     members.  The  Company  expects  to  resume
                                     negotiations  during  the  second  calendar
                                     quarter  of  1998  and  will   continue  to
                                     operate  under  the  terms of the  existing
                                     agreement until negotiations are completed.

                                     The  Company  believes  that the wage rates
                                     and benefits for other employee  groups are
                                     comparable  to  similar   groups  at  other
                                     regional  airlines.  The Company is unaware
                                     of  significant  organizing  activities  by
                                     labor   unions   among   other    non-union
                                     employees at this time.

                               (f)   Use of Estimates

                                     The preparation of financial  statements in
                                     accordance    with    generally    accepted
                                     accounting  principles  requires management
                                     to make certain  estimates and  assumptions
                                     regarding valuation of assets,  recognition
                                     of  liabilities  for costs such as aircraft
                                     maintenance,  differences  in timing of air
                                     traffic  billings  from  United  and  other
                                     airlines,  operating  revenues and expenses
                                     during  the  period   and   disclosure   of
                                     contingent  assets and  liabilities  at the
                                     date of the  financial  statements.  Actual
                                     results could differ from those estimates.

                               (g)   Expendable Parts

                                     Expendable parts and supplies are stated at
                                     the  lower  of  cost  or  market,  less  an
                                     allowance  for  obsolescence  of  $120,000,
                                     $169,950  and  $232,601 for the years ended
                                     December   31,   1995,   1996   and   1997,
                                     respectively. Expendable parts and supplies
                                     are  charged  to  expense as they are used.
                                     Amounts  charged to costs and  expenses for
                                     obsolescence  in 1995,  1996 and 1997  were
                                     $120,000, $49,950 and $62,652 respectively.

                               (h)   Property and Equipment

                                     Property and  equipment are stated at cost.
                                     Depreciation    is    computed    on    the
                                     straight-line  method  over  the  estimated
                                     useful  lives of the related  assets  which
                                     range   from   five   to   fifteen   years.
                                     Amortization  of capital leases is included
                                     in   depreciation   expense.   The  Company
                                     periodically  evaluates  whether events and
                                     circumstances   have  occurred   which  may
                                     impair  the  estimated  useful  life or the
                                     recoverability  of the remaining balance of
                                     its  long-lived  assets.  If such events or
                                     circumstances  were to  indicate  that  the
                                     carrying  amount of these  assets would not
                                     be recoverable,  the Company would estimate
                                     the future  cash flows  expected  to result
                                     from  the  use  of  the  assets  and  their
                                     eventual  disposition.  If  the  sum of the
                                     expected  future  cash flows  (undiscounted
                                     and without interest  charges) is less than
                                     the  carrying   amount  of  the  asset,  an
                                     impairment  loss would be recognized by the
                                     Company.


                               (i)   Preoperating Costs

                                     Preoperating  costs  represent  the cost of
                                     integrating  new  types of  aircraft.  Such
                                     costs,  which  consist  primarily of flight
                                     crew   training  and   aircraft   ownership
                                     related  costs,  are deferred and amortized
                                     over  a   period   of  four   years   on  a
                                     straight-line basis.

                                     In   1997,    the    Company    capitalized
                                     approximately  $1.8  million of these costs
                                     related to the introduction of the Canadair
                                     Regional  Jet  ("CRJ")  into the  Company's
                                     fleet.    Accumulated    amortization    of
                                     preoperating costs at December 31, 1996 and
                                     1997    were    $722,000    and    $53,000,
                                     respectively.    In    1997,    the    J-41
                                     preoperating    costs    were    completely
                                     amortized and written off.

                               (j)   Intangible Assets

                                     Goodwill  of  approximately  $3.2  million,
                                     representing  the  excess of cost above the
                                     fair  value of net assets  acquired  in the
                                     acquisition  of ACA, is being  amortized by
                                     the straight-line method over twenty years.
                                     The primary financial indicator used by the
                                     Company to assess the recoverability of its
                                     goodwill is undiscounted  future cash flows
                                     from operations.  The amount of impairment,
                                     if any,  is  measured  based  on  projected
                                     future  cash flows  using a  discount  rate
                                     reflecting  the  Company's  average cost of
                                     funds.  Slots  are being  amortized  by the
                                     straight-line  method  over  twenty  years.
                                     Accumulated   amortization   of  intangible
                                     assets at  December  31,  1996 and 1997 was
                                     $911,000 and $1.1 million, respectively.

                               (k)   Maintenance

                                     The Company's maintenance accounting policy
                                     is a  combination  of  expensing  events as
                                     incurred    and    accruing   for   certain
                                     maintenance events. The Company accrues for
                                     current and future maintenance events on an
                                     ongoing basis at rates it estimates will be
                                     sufficient to cover  maintenance  costs for
                                     the aircraft.  For the J-32  aircraft,  the
                                     Company  accrues for engine  overhaul costs
                                     on a per flight  hour  basis.  For the J-41
                                     aircraft,  the Company accrues for airframe
                                     component  and engine  overhaul  costs on a
                                     per  flight   hour   basis.   For  the  CRJ
                                     aircraft,   the  Company  accrues  for  the
                                     replacement of engine life limited parts on
                                     a per cycle  basis.  All other  maintenance
                                     costs are expensed as incurred.

                               (l)   Deferred Credits

                                     The Company  accounts for lease  incentives
                                     provided by the aircraft  manufacturers  as
                                     deferred   credits.   These   credits   are
                                     amortized  on a  straight-line  basis  as a
                                     reduction   to  lease   expense   over  the
                                     respective lease term. The lease incentives
                                     are  credits  that may be used to  purchase
                                     spare  parts,   satisfy   aircraft   return
                                     conditions and or be applied against future
                                     rental payments.

                               (m)   Income Taxes

                                     The Company  accounts for  deferred  income
                                     taxes using the asset and liability method.
                                     Under  the  asset  and  liability   method,
                                     deferred  tax  assets and  liabilities  are
                                     recognized for the future tax  consequences
                                     attributable  to  differences  between  the
                                     financial  statement  carrying  amounts for
                                     existing   assets   and   liabilities   and
                                     respective  tax bases.  Deferred tax assets
                                     and  liabilities are measured using enacted
                                     tax  rates  expected  to apply  to  taxable
                                     income  in  future  years  in  which  those
                                     temporary  differences  are  expected to be
                                     recovered or settled.

                                (n)  Stock Options

                                     The Company  accounts  for its  stock-based
                                     compensation   plans  using  the  intrinsic
                                     value method  prescribed  under  Accounting
                                     Principles  Board (APB) No. 25. Under these
                                     principles,     the     Company     records
                                     compensation expense for stock options only
                                     if the exercise price is less than the fair
                                     market   value   of   the   stock   on  the
                                     measurement date.

                               (o)   Income Per Share

                                     On March 3, 1997 the  Financial  Accounting
                                     Standards   Board   issued   Statement   of
                                     Financial  Accounting  Standards  No,  128,
                                     "Earnings  per  Share  (SFAS  128)",  which
                                     became  effective for the Company's  fiscal
                                     year ended  December  31, 1997 and required
                                     restatement of previously reported earnings
                                     per share data.  SFAS 128  provides for the
                                     calculation of Basic and Diluted income per
                                     share.

                                     Basic  income  per  share  is  computed  by
                                     dividing net income,  after  deducting  any
                                     preferred  dividend  requirements,  by  the
                                     weighted  average  number of common  shares
                                     outstanding.  Diluted  income  per share is
                                     computed  by  dividing  net  income,  after
                                     deducting    any     preferred     dividend
                                     requirements,   by  the  weighted   average
                                     number of  common  shares  outstanding  and
                                     common stock equivalents,  which consist of
                                     shares  subject to stock  options  computed
                                     using  the  treasury   stock   method.   In
                                     addition,  dilutive convertible  securities
                                     are  included  in  the  denominator   while
                                     interest,  net of tax, for convertible debt
                                     is included in the numerator.  In 1995, the
                                     dilutive    effect   of   the   convertible
                                     preferred  stock and the  convertible  debt
                                     are included in the  calculation of diluted
                                     income  per  share.  In  1996,  convertible
                                     preferred   stock  is  included,   but  the
                                     convertible  debt was  retired  in 1995 and
                                     therefore,   not   included   in  the  1996
                                     calculation.   In  1997,  the   calculation
                                     included   the   dilutive   effect  of  new
                                     convertible  debt, but not the  convertible
                                     preferred stock as it was redeemed in 1996.

                                     A  reconciliation   of  the  numerator  and
                                     denominator  used in  computing  income per
                                     share is as follows  (in  thousands  except
                                     per share amounts):

<TABLE>
                                                      1995                      1996                    1997
                                                      ----                      ----                    ----
<CAPTION>

                                               Basic      Diluted      Basic       Diluted      Basic      Diluted
       ---------------------------------------------------------------------------------------------------------------
<S>                                            <C>        <C>           <C>        <C>          <C>        <C>
  
     Share calculation:
       Average number of common shares
            outstanding                            8,342     8,342       8,481        8,481       7,824       7,824
                Common stock equivalents
           due to assumed exercise of                  -       415           -          311           -         350
           options
       Common stock equivalents due to
           assumed conversion of preferred
           stock                                       -       546           -          128           -           -
       Common stock equivalents due to
           assumed conversion of
           convertible debt                            -       568           -            -           -       1,582
                                            --------------------------------------------------------------------------
       Total common shares and common stock
           equivalents                             8,342     9,871       8,481        8,920       7,824       9,756

                                            --------------------------------------------------------------------------
       Adjustments to net income:
       Net income                              $  12,902 $  12,902   $  19,158    $  19,158    $ 14,500    $ 14,500
         Preferred dividend
           requirements based on average
           number of preferred shares              (335)         -         (64)          -           -           -
         Interest expense, net of tax                -         237          -            -           -       1,187
                                            --------------------------------------------------------------------------
       Net income available to common
           shareholders                        $  12,567 $  13,139   $  19,094    $  19,158    $ 14,500    $ 15,687
                                            --------------------------------------------------------------------------

       Net income per share                  $      1.51 $   1.33    $  2.25       $ 2.15    $     1.85  $     1.61
                                                                    
       ---------------------------------------------------------------------------------------------------------------
</TABLE>

                               (p)   Reclassifications

                                     Certain amounts as previously reported have
                                     been  reclassified  to  conform  to to  the
                                     current year presentation.

<TABLE>

2.  Property and
     Equipment                 Property and equipment consist of the following:

                               (in thousands)
<CAPTION>
                               December 31,                                                           1996            1997
                               ---------------------------------------------------------- ---------------- ---------------
                               <S>                                                        <C>              <C>   
                               
                               Owned aircraft and improvements                                           -       $  18,916
                               Improvements to leased aircraft                                    $  2,350           3,521
                               Flight equipment, primarily rotable spare parts                      14,014          18,456
                               Maintenance and ground equipment                                      3,380           4,166
                               Computer hardware and software                                        1,464           2,029
                               Furniture and fixtures                                                  296             445
                               Leasehold improvements                                                  619           1,831
                               ---------------------------------------------------------- ---------------- ---------------
                                                                                                    22,123          49,364
                               Less:  Accumulated depreciation and amortization                      5,966           8,726
                               ---------------------------------------------------------- ---------------- ---------------
                                                                                                  $ 16,157        $ 40,638
                               ---------------------------------------------------------- ---------------- ---------------
</TABLE>
<TABLE>

3.  Accrued                    Accrued liabilities consist of the following:
     Liabilities
                               (in thousands)
                              <CAPTION>
                               December 31,                                                          1996            1997
                               ---------------------------------------------------------- ---------------- ---------------
                               <S>                                                         <C>             <C>   
                               
                               Accrued payroll and employee benefits                              $  4,929        $  6,914
                               Air traffic liability                                                 2,703           1,404
                               Interest                                                                 13           1,352
                               Aircraft rents                                                          564           1,644
                               Reservations and handling                                             2,454           2,441
                               Engine and airframe overhaul costs                                    3,311           3,589
                               Fuel                                                                  1,196             977
                               Accrued taxes payable                                                     -           2,704
                               Other                                                                 2,206           2,306
                               ---------------------------------------------------------- ---------------- ---------------
                                                                                                   $17,376         $23,331
                               ---------------------------------------------------------- ---------------- ---------------
</TABLE>

4.   Debt      On November  1, 1995,  the  Company  entered  into a line of
               credit agreement with a financial  institution  which, based on a
               specified   percentage  of  outstanding   interline   receivables
               (financing  base),  provides for borrowings of up to $20 million.
               The line of credit is collateralized by accounts  receivables and
               general  intangibles  and will expire on September  30, 2000,  or
               upon  termination  of the  United  Express  marketing  agreement,
               whichever  is sooner.  Interest  is payable  monthly at an annual
               rate of prime plus 1% (8.5% at December  31,  1997).  The Company
               has pledged approximately $7.7 million of this line as collateral
               to secure  letters of credit issued on behalf of the Company.  At
               December 31, 1997, the Company's  remaining  available  borrowing
               limit  was  approximately  $4  million.   There  was  no  balance
               outstanding  under the line of credit at December  31,  1996,  or
               December 31, 1997.

<PAGE>

<TABLE>

             Long-term debt consists of the following:
             (in thousands)
             December 31,      
<CAPTION>
                                                                                                         1996             1997
             
             ----------------------------------------------------------------------------- ------------------ ----------------
             <S>                                                                           <C>                <C>    
             Convertible  subordinated  notes,   principal  due  July  1,  2004,
                   interest   payable  in   semi-annual   installments   on  the     
                   outstanding principal with interest
                   at 7%, unsecured.                                                               $        -          $57,500

             EquipmentNotes  associated  with Pass Through  Trust  Certificates,
                      due January 1, 2008 and January 1, 2010, principal payable
                      annually
                   through January 1, 2006 and semi-annually  thereafter through
                   maturity,  interest payable semi-annually at 7.49% throughout
                   term of notes,
                   collateralized by J-41 aircraft.                                                         -           16,431

             Notes to institutional  lenders,  originally due between March 1998
                   and April 2001,  principal  and  interest  payable in monthly
                   installments   ranging  between  $9,500  and  $40,000,   with
                   interest   from  6.5%  to  12%,   collateralized   by  flight
                   equipment, spare engines and parts, and
                   ground equipment.                                                                    2,302              331

             Note payable to supplier, due May 15, 2000, principal payable monthly with
                   interest at 6.74%, unsecured.                                                            -            1,225

             Note  payable to airport  authority,  due April 1, 2001,  principal
                   payable  monthly with interest at 6.5% through March 31, 1995
                   and prime plus
                   1.5% thereafter through maturity, collateralized by expendable parts                   760                -
                   inventory.

             Note payable to institutional lender, due October 1, 1998, principal payable
                   monthly with interest at 6.61%, unsecured.                                             466              217

             Note  payable  to other  airline,  due  March 31,  1998,  principal
                   payable in quarterly installments of $38,400 with interest at
                   9%, collateralized
                   by ground support equipment.                                                           192                -

             Other                                                                                          6                2
             ----------------------------------------------------------------------------- ------------------ ----------------
             Total                                                                                      3,726           75,706
             ----------------------------------------------------------------------------- ------------------ ----------------
             Less:  Current Portion                                                                     1,319            1,851
             ----------------------------------------------------------------------------- ------------------ ----------------
                                                                                                       $2,407          $73,855
             ----------------------------------------------------------------------------- ------------------ ----------------
</TABLE>


                               In September 1997,  approximately $112 million of
                               pass  through   certificates  were  issued  in  a
                               private   placement  by  separate   pass  through
                               trusts,  which  used  the  proceeds  to  purchase
                               equipment notes (the "Equipment Notes") issued in
                               connection with (i) leveraged lease  transactions
                               relating to four J-41s and six CRJs (delivered or
                               expected  to be  delivered),  all of which are or
                               will  be  leased  to  the  Company  (the  "Leased
                               Aircraft"),  and (ii) the financing of four J-41s
                               owned by the Company (the "Owned Aircraft").  The
                               Equipment  Notes issued with respect to the Owned
                               Aircraft   are   direct   obligations   of   ACA,
                               guaranteed  by  ACAI  and  are  included  as debt
                               obligations   in   the   accompanying   financial
                               statements.   The  Equipment  Notes  issued  with
                               respect to the Leased  Aircraft  are neither debt
                               obligations  of ACA nor  guaranteed by ACAI.  The
                               Equipment  Notes for the Owned  Aircraft  carry a
                               weighted  average  interest rate of approximately
                               7.49%  with three  Equipment  Notes  maturing  on
                               January 1, 2008,  and one Equipment Note maturing
                               January 1, 2010. The aggregate  principal  amount
                               of the  notes  is  approximately  $16.4  million.
                               Aggregate  principal  payments  for the next five
                               years will be approximately $1 million in each of
                               the years of 1998  through  2001 and $1.1 million
                               in 2002.

                               With  respect  to one  CRJ  leased  aircraft,  at
                               December 31, 1997 (the "Prefunded Aircraft"), the
                               proceeds  from  the sale of the  Equipment  Notes
                               were deposited into  collateral  accounts,  to be
                               released  at the  closing  of a  leveraged  lease
                               related  to the  Prefunded  Aircraft.  In January
                               1998, an equity investor  purchased this aircraft
                               and  entered  into a  leveraged  lease  with  the
                               Company   and  the   collateral   accounts   were
                               released.

                               Pursuant to a Purchase Agreement executed on June
                               27, 1997,  between the Company and Alex.  Brown &
                               Sons,   Incorporated  and  The  Robinson-Humphrey
                               Company,  Inc. as Initial Purchasers,  on July 2,
                               1997,  the Company  issued $50 million  aggregate
                               principal  amount of 7% Convertible  Subordinated
                               Notes due July 1, 2004 (the "Notes"), pursuant to
                               Rule 144A under the  Securities  Act of 1933, and
                               received  net  proceeds  of  approximately  $48.3
                               million related to the sale of the Notes. On July
                               18, 1997 the Company  issued an  additional  $7.5
                               million  aggregate  principal amount of the Notes
                               to  cover   over-allotments,   and  received  net
                               proceeds of $7.3 million  related to the exercise
                               of the over-allotment option.

                               The Notes are  convertible  into shares of Common
                               Stock,  par  value  $0.02  of  the  Company  (the
                               "Common  Stock") by the holders at any time after
                               sixty days  following the latest date of original
                               issuance  thereof and prior to  maturity,  unless
                               previously   redeemed   or   repurchased,   at  a
                               conversion  price of $18 per  share,  subject  to
                               certain  adjustments.  Interest  on the  Notes is
                               payable  on April 1 and  October 1 of each  year,
                               commencing  October  1,  1997.  The Notes are not
                               redeemable  by the  Company  until  July 1, 2000.
                               Thereafter,  the Notes will be redeemable, at any
                               time, on at least 15 days notice at the option of
                               the  Company,   in  whole  or  in  part,  at  the
                               redemption  prices  set  forth  in the  Indenture
                               dated July 2, 1997,  in each case,  together with
                               accrued  interest.  The Notes are  unsecured  and
                               subordinated  in right of  payment in full to all
                               existing  and  future  Senior   Indebtedness   as
                               defined  in the  Indenture.  The  holders  of the
                               Notes  have  certain   registration  rights  with
                               respect  to the Notes and the  underlying  Common
                               Stock (see subsequent events footnote).

                               On April 1, 1997,  the  Company  executed  an $11
                               million  short-term  promissory note for deposits
                               related   to  the   acquisition   of  CRJs.   The
                               promissory  note was paid in full on July 2, 1997
                               from the  proceeds of the Notes issued on July 2,
                               1997 as described above. During 1997, the Company
                               retired  $3.1  million of certain  high  interest
                               rate  debt with the  proceeds  of the  Notes.  On
                               December 30, 1994, the Company entered into a $20
                               million  financing  agreement  with  JSX  Capital
                               Corporation  ("JSX"),  an  affiliate  of  British
                               Aerospace,   Inc.   ("BAI").   This   arrangement
                               included the conversion of an outstanding loan on
                               a  revolving  credit  facility  of $10 million to
                               equity,  an  additional  $1 million  cash  equity
                               investment,  creation of a term loan  facility in
                               the amount of $4 million,  issuance of redeemable
                               convertible preferred stock of approximately $3.8
                               million,  and  a new  revolving  line  of  credit
                               facility of $5 million.

                               The $4  million  convertible  term  loan  was due
                               October 31, 1999, with interest at prime plus 2%,
                               payable  monthly,  except that  through  June 30,
                               1995,  interest was deferrable and could be added
                               to  the  principal  balance,   at  the  Company's
                               option. The principal  repayment  consisted of 12
                               equal  payments of  principal  (plus the pro rata
                               portion of any unpaid interest)  payable on April
                               30,  July 31,  and  October  31 of the years 1996
                               through 1999. Any principal or interest unpaid as
                               of October 31, 1999, could, at the option of JSX,
                               be converted into common stock at $7 per share at
                               any time thereafter until paid. The term loan was
                               collateralized  by the Company's fixed assets and
                               accounts  receivable.  During  1995,  the Company
                               prepaid the  balance in full at a discount  which
                               resulted in an extraordinary gain of $400,000.

                               A total of 3,825  shares of  Series A  Redeemable
                               Convertible  Preferred  Stock at $1,000 per share
                               with  liquidation  preference of full face amount
                               plus  accrued  and unpaid  dividends  was issued,
                               resulting in total proceeds of $3.8 million.  The
                               shares  were to be redeemed by the Company at the
                               end of seven  years  and were  redeemable  at the
                               option of the Company,  prior to redemption.  The
                               Company redeemed, at par, the Series A Redeemable
                               Convertible Preferred Stock on March 29, 1996.



<PAGE>


                               As of December 31, 1997, maturities of long-term 
                               debt are as follows:
                               (in thousands)
                               -------------------------------------------------
                               1998                          1,851
                               1999                          1,650
                               2000                          1,403
                               2001                          1,042
                               2002                          1,115
                               2003-2010                    68,645
                               -------------------------------------------------
                                                           $75,706
                               -------------------------------------------------

                               The  Company  has  various   financial   covenant
                               requirements   associated   with   its  debt  and
                               marketing  agreements.  These  covenants  require
                               meeting certain financial ratio tests,  including
                               tangible net worth,  net earnings,  current ratio
                               and debt service levels.

5.  Obligations Under Capital Leases          
          
     The Company leases certain equipment for noncancellable  terms of more than
one year. The net Under Capital book value of the equipment under capital leases
at December  31, 1996 and 1997 is $5.2 million and $4.5  million,  respectively.
The leases were capitalized at the present value of the lease payments. Interest
rates for these leases ranged from 2.3% to 18.1%.
         
          At December 31, 1997, the future minimum payments, by year and in the
          aggregate,  together  with the present  value of the net minimum lease
          payments, are as follows:

                                (in thousands)
                               Year Ending December 31,

                               -------------------------------------------------
                               1998                                   $    1,820
                               1999                                         1666
                               2000                                          581
                               2001                                          201
                               2002                                           19
                               -------------------------------------------------
                               Future minimum lease payments               4,287
                               Amount representing interest                  267
                               -------------------------------------------------
                               Present value of minimum lease payments     4,020
                               Less:  Current maturities                   1,730
                               -------------------------------------------------
                                                                      $    2,290
                               -------------------------------------------------
6.   Operating Leases 

          The  Company   leases  its  principal   administrative,   airport  and
          maintenance  facilities  under operating  leases expiring from
          2002 to 2023. Future minimum lease payments will average approximately
          $2.4 million per year.

          Future minimum lease payments under noncancellable  aircraft operating
          leases at December 31, 1997 are as follows:


                               (in thousands)
                               Year ending December 31,
                               -------------------------------------------------
                               1998                                    $ 36,037 
                               1999                                      35,146
                               2000                                      34,909
                               2001                                      33,304
                               2002                                      32,708
                               2003 - 2007                              134,212
                               2008 - 2012                               60,413
                               2013 - 2014                               12,829
                               ------------------------------------------------ 
                                     Total minimum lease payments     $ 379,558
                               -------------------------------------------------
                               The   noncancellable   aircraft  operating  lease
                               commitments  above  reflect  amounts  for one CRJ
                               pursuant to an operating lease with a third party
                               that was not signed  until  January  1998.  As of
                               December 31, 1997, and prior to entering into the
                               long term  operating  lease in January 1998,  the
                               Company  was   obligated   to  pay  rent  to  the
                               manufacturer  under a month  to  month  operating
                               lease agreement.  Certain of the Company's leases
                               require aircraft to be in a specified maintenance
                               condition at lease  termination or upon return of
                               the aircraft.

                               The Company's lease agreements  generally provide
                               that  the   Company   pay   taxes,   maintenance,
                               insurance and other operating expenses applicable
                               to leased  assets.  Operating  lease  expense was
                               $30.5 million;  $33.8 million;  and $35.7 million
                               for the years ended  December 31, 1995,  1996 and
                               1997, respectively.

7.  Stockholders'              Stock Option Plans
       Equity
                               The Company  has two  nonqualified  stock  option
                               plans which  provide for the  issuance of options
                               to  purchase  common  stock  of  the  Company  to
                               certain  employees  and directors of the Company.
                               Under  the  plans,  options  are  granted  by the
                               compensation  committee of the board of directors
                               and vest over a three year period, commencing one
                               year after the date of the grant.

                               The  Company  has  reserved  1,500,000  shares of
                               common  stock for  issuance  upon the exercise of
                               options granted under the plan.

                              A summary  of the  status of the  Company's  stock
                              options as of December 31, 1995, 1996 and 1997 and
                              changes  during the periods  ending on those dates
                              is presented below:

<TABLE>

                                                                1995                       1996                         1997
                                                                ----                       ----                         ----
                                                          Weighted-average           Weighted-average            Weighted-average
                                                            exercise                   exercise                  exercise price
                                                              price                      price
<CAPTION>
                                               Shares                      Shares                        Shares
                                            ------------- ------------- ------------ -------------  ------------- --------------
<S>                                         <C>           <C>           <C>          <C>           <C>           <C>

Outstanding at beginning of year                  653,002     $    2.32      729,558      $   2.86       958,392          $6.32
Granted                                           140,500     $    5.30      395,500       $ 11.42       342,000         $17.82
Exercised                                          31,941     $    2.25      142,499      $   2.49       240,597          $5.20
Canceled                                           32,003     $    3.02       24,167      $   7.85        31,334         $10.89
                                            ------------- ------------- ------------ ------------- ------------- --------------
Outstanding at end of year                        729,558     $    2.86      958,392      $   6.32     1,028,461         $10.27
                                            ------------- ------------- ------------ ------------- ------------- --------------

Options exercisable at year-end                   541,889     $    2.23      531,443      $   3.34       458,284          $4.54
                                            ------------- ------------- ------------ ------------- ------------- --------------

Weighted-average fair value of options
    granted during the year                         $4.03                      $8.49                      $12.98
</TABLE>

          The following table summarizes  information  about fixed stock options
          at December 31, 1997:

<TABLE>
                                                      Options Outstanding                          Options Exercisable
                                                       Weighted-average
                                          Number           remaining     Weighted-average       Number       Weighted-average
                                      outstanding at   contractual life   exercise price      exercisable     exercise price
<CAPTION>
      Range of exercise price            12/31/97           (years)                            12/31/97
- ------------------------------------ ----------------- ----------------- ----------------- ----------------- -----------------
<S>                                  <C>               <C>               <C>               <C>               <C>    
$2.08 - $3.45                                  340,500               4.9           $  2.15           321,503           $  2.12
$3.45 - $6.90                                   22,000               7.0           $  4.25            15,333           $  4.08
$6.90 - $10.35                                 116,619               7.9           $  8.96            51,613           $  8.83
$10.35 - $13.80                                247,342               8.9            $12.41            58,170            $11.89
$13.80 - $17.25                                162,500               9.1            $15.63            11,665            $16.04
$17.25 - $20.70                                  9,500               9.7            $19.17                 0           $  0.00
$20.70 - $24.15                                127,500               9.8            $22.17                 0           $  0.00
$27.60 - $31.05                                  2,500              10.0            $30.50                 0           $  0.00
                                     ----------------- ----------------- ----------------- ----------------- -----------------
                                             1,028,461               7.6            $10.27           458,284           $  4.54
</TABLE>

                              A risk-free  interest rate of 5.8%, 5.25% and 5.8%
                              for 1995,  1996,  and 1997, a  volatility  rate of
                              76%, 71% and 50% for 1995,  1996 and 1997, with an
                              expected  life of 7.5  years  for  1995,  1996 and
                              1997, was assumed in estimating the fair value. No
                              dividend rate was assumed for any of the years.

                              The  following  summarizes  the pro forma  effects
                              assuming  compensation  for such  awards  had been
                              recorded based upon the estimated fair value.  The
                              proforma  information  disclosed  below  does  not
                              include the impact of awards made prior to January
                              1, 1995 (in thousands, except per share data):

<TABLE>

                                           1995                      1996                           1997
<CAPTION>
                               As Reported         Pro       As Reported    Pro Forma     As Reported      Pro Forma
                                                  Forma
                              --------------- -------------- ------------- ------------- --------------- --------------
       <S>                    <C>             <C>            <C>           <C>           <C>             <C>

       Net Income             $  12,902       $  12,819      $  19,158     $  18,117     $  14,500       $  13,436

       Basic earnings
        per share             $      1.51     $      1.50    $      2.25   $     2.13    $      1.85     $     1.72

       Diluted earnings per
       share                  $      1.33     $      1.30    $      2.15   $      2.03   $      1.61     $     1.50

</TABLE>

                              Preferred Stock

                              The  Board  of   Directors   of  the   Company  is
                              authorized  to  provide  for the  issuance  by the
                              Company of  preferred  stock in one or more series
                              and to fix the  rights,  preferences,  privileges,
                              qualifications,   limitations   and   restrictions
                              thereof, including,  without limitation,  dividend
                              rights,  dividend rates, conversion rights, voting
                              rights,   terms  of  redemption   or   repurchase,
                              redemption or repurchase  prices,  limitations  or
                              restrictions thereon,  liquidation preferences and
                              the  number of shares  constituting  any series or
                              the  designation  of  such  series,   without  any
                              further vote or action by the stockholders.

                              At December  31, 1996,  and 1997,  the Company had
                              5,000,000 shares of $.02 par value preferred stock
                              authorized.  8,000 of those shares were designated
                              in  1994  as  Series  A   Cumulative   Convertible
                              Preferred Stock, of which 3,825 shares were issued
                              as of December 31, 1995.  These shares were issued
                              in connection with a financing arrangement entered
                              into by the Company on December 30, 1994.

                              In January 1996, the Company's  Board of Directors
                              declared  dividends  of  $334,688  on its Series A
                              Cumulative   Convertible   Preferred  Stock.  This
                              represents  accrued  dividends  for the year ended
                              December  31,  1995,   in   accordance   with  the
                              financing  arrangement entered into by the Company
                              in December 1994. The Company paid these dividends
                              in February 1996.

                              The  Company  redeemed  $3.8  million  in Series A
                              Redeemable Cumulative  Convertible Preferred Stock
                              on March 29, 1996.

8. Employee  Benefit Plans


          The Company  established an Employee Stock Ownership Plan (the "ESOP")
          covering substantially all employees. For each of the years 1992
          through 1995,  the Company made  contributions  to the ESOP which were
          used in part to make loan and  interest  payments.  For the year ended
          December  31,  1995,  the  Company  made  contributions  to  the  ESOP
          amounting to  $131,040.  No  contributions  were made in 1996 or 1997.
          Shares of common  stock  acquired by the ESOP are to be  allocated  to
          each employee based on the employee's annual compensation.
                              

          Effective  January 1, 1992,  the  Company  adopted a 401(k)  Plan (the
          "Plan").  The Plan covers  substantially  all full-time  employees who
          meet the Plan's eligibility requirements. Employees may elect a salary
          reduction  contribution up to 17% of their annual  compensation not to
          exceed the maximum amount allowed by the Internal Revenue Service.

          Effective October 1, 1994, the Plan was amended to require the Company
          to make  contributions to the Plan for eligible pilots in exchange for
          certain  concessions.   These  contributions  are  in  excess  of  any
          discretionary  contributions  made for the pilots  under the  original
          terms of the plan. The  contribution is 100% vested and equal to 3% of
          the first $15,000 of compensation plus 2% of compensation in excess of
          $15,000.  The Company's  contributions for the pilots shall not exceed
          15% of the Company's  adjusted net income before  extraordinary  items
          for such plan year. The Company's  obligations  to make  contributions
          with  respect  to all plan years in the  aggregate  is limited to $2.5
          million.  Contribution expense was approximately  $395,000,  $370,000,
          and $445,000 for 1995, 1996 and 1997, respectively.
                              

          Effective  June 1, 1995,  the Plan was amended to allow the Company to
          make a discretionary  matching  contribution  for non-union  employees
          equal to 25% of salary  contributions up to 4% of total  compensation.
          Contribution expense was approximately  $13,000,  $29,000 and $133,000
          for 1995,  1996 and 1997,  respectively.  Effective April 1, 1997, all
          eligible pilots were included under the original terms of the Plan.

          In  addition  to the pilot  401(k),  the  Company  has profit  sharing
          programs which result in periodic payments to all eligible  employees.
          Profit sharing  compensation,  which is based on attainment of certain
          performance and financial goals, was approximately $1.2 million,  $2.6
          million, and $3.6 million in 1995, 1996 and 1997, respectively.
       

9. Income Taxes

          The  provision  (benefit)  for income  taxes  includes  the  following
          components:
              
         <TABLE>
                              (in thousands)
         <CAPTION>
                              Year Ending December 31,                            1995             1996             1997
                             
                              ------------------------------------------------------------------------------------------------
                              <S>                                     <C>                <C>               <C>   
 
                              Federal:                                                                                            
                                                                                                                                 
                                   Current                                        238             1,699                7,342
                                   Deferred                                    (1,230)           (1,344)               1,907
                              --------------------------------------- ------------------ ----------------- ------------------- 
                              Total federal provision (benefit)                  (992)               355               9,249
                              --------------------------------------- ------------------ ----------------- ------------------- 
                              State:
                                   Current                                          50               391               2,545
                                   Deferred                                      (270)             (296)                 545
                              --------------------------------------- ------------------ ----------------- ------------------- 
                              Total state provision (benefit)                    (220)                95               3,090
                              --------------------------------------- ------------------ ----------------- ------------------- 
                              Total provision (benefit)                 $      (1,212)      $        450       $      12,339
                                                                                                    
                              --------------------------------------- ------------------ ----------------- ------------------- 
</TABLE>
                              
                              A reconciliation  of income tax expense  (benefit)
                              at the  applicable  federal  statutory  income tax
                              rate  of  35%  to  the  tax  provision   (benefit)
                              recorded is as follows:
<TABLE>

                              (in thousands)
                            <CAPTION>
                              Year ending December 31,                            1995               1996               1997
                              --------------------------------------- ------------------ ------------------ ------------------
                              <S>                                     <C>                <C>                <C>    
                              Income tax expense
                                  at statutory rate                           $ 4,092             $ 6,863            $ 9,394
                              Increase (decrease) in tax
                                expense (benefit):

                                   Change in valuation
                                      allowance                               (1,500)             (1,640)                  -
                                   Utilization of net operating
                                      loss carryforward                       (4,677)             (5,811)                  -
                                   Alternative minimum tax
                                      expense ("AMT")                             210                   -                  -
                                   Permanent differences
                                     and other                                     78                  58                937
                                   State income taxes, net
                                      of federal benefit                          585                 980              2,008
                              --------------------------------------- ------------------ ------------------ ------------------
                              
                              Income tax expense (benefit)                   $(1,212)            $    450            $12,339
                              --------------------------------------- ------------------ ------------------ ------------------
</TABLE>

                              Deferred   income  taxes  result  from   temporary
                              differences  which are the result of provisions of
                              the tax laws that either require or permit certain
                              items of income or expense to be reported  for tax
                              purposes in different  periods than for  financial
                              reporting purposes.


                              The  following  is  a  summary  of  the  Company's
                              deferred income taxes as of December 31, 1996, and
                              1997:
<TABLE>

                              (in thousands)
<CAPTION>
                              December 31,                                                           1996               1997
                              ------------------------------------------------ -------------------------- ------------------
                              <S>                                              <C>                        <C>    
                              Deferred tax assets:
                                   Engine overhaul reserve                                        $ 1,324          $ 1,489
                                   Intangible assets                                                1,195            1,139
                                   Revenue valuation reserves                                       1,362              746
                                   Reserve for bad debts                                              265              150
                                  Alternative minimum tax
                                      credit                                                          661                -
                                  carryforwards
                                   Deferred credits                                                     -            1,940
                                   Other                                                              358              715
                              ----------------------------------------- ------ -------------------------- ------------------
                                      Total deferred tax assets                                     5,165            6,179

                              Deferred tax liabilities:
                                   Depreciation and amortization                                  (1,935)          (4,614)
                                   Preoperating costs                                                (90)            (828)
                                   Other                                                                -             (49)
                              ------------------------------------------ ----- -------------------------- ------------------
                                       Total deferred tax liabilities                             (2,025)          (5,491)

                              ------------------------------------------ ----- -------------------------- ------------------
                              Net deferred income tax assets                                      $ 3,140         $    688
                              ------------------------------------------ ----- -------------------------- ------------------
</TABLE>

                              No valuation  allowance was  established in either
                              1996 or  1997 as the  Company  believes  that  the
                              future  realization  of the  deferred tax asset is
                              more likely than not.

                              The Tax Reform Act of 1986 enacted an  alternative
                              minimum  tax  system,   generally   effective  for
                              taxable years  beginning  after December 31, 1986.
                              The Company is not subject to alternative  minimum
                              tax for the year ended  December 31, 1997.  An AMT
                              tax credit carryover of approximately $564,000 was
                              fully utilized in 1997.

                              The Company  recorded a provision for income taxes
                              of approximately  $500,000 for 1996, compared to a
                              provision for income taxes of approximately  $12.3
                              million in 1997.  The 1996  effective  tax rate of
                              approximately  2.3% is significantly less than the
                              statutory  federal and state rates due principally
                              to the  full  utilization  of net  operating  loss
                              carryforwards and the elimination of the valuation
                              allowance.   The  1997   effective   tax  rate  of
                              approximately  46% is  higher  than the  statutory
                              federal and state rates.  The higher effective tax
                              reflects   a   more   conservative   approach   to
                              estimating  permanent  differences between taxable
                              and book income.

10. Commitments                 Aircraft

                                As of December 31, 1997, the Company had a total
                                of 18 CRJs on order from  Bombardier,  Inc.  The
                                initial  order  for 12 CRJs and 36  options  was
                                placed  on  January  28,   1997.   Options  were
                                exercised on November 20, 1997 for an additional
                                six firm and six conditional CRJ deliveries. The
                                first five CRJs were  delivered in the third and
                                fourth  quarters of 1997.  Nine  deliveries  are
                                scheduled  in  1998  and  nine   deliveries  are
                                scheduled  in  1999.  The  capital  cost  to the
                                Company for these 18 deliveries is approximately
                                $166.5  million  in 1998 and  $166.5  million in
                                1999.  As of December 31, 1997,  the Company has
                                made  $15  million  of  non-refundable  aircraft
                                purchase   deposits  on  these   aircraft   (see
                                Footnote 17, Subsequent Events).

                                The  Company is  exploring  various  third party
                                lease   financing    arrangements   for   future
                                aircraft.  However, the Company has backup lease
                                financing  arrangements or sufficient  financing
                                support  with  the  manufacturer  such  that the
                                Company  believes it will be able to acquire the
                                aircraft  at  competitive   rates.  The  Company
                                currently  has an agreement in principle  from a
                                third party for  approximately  $126  million in
                                debt financing  associated  with the purchase of
                                nine CRJ's to be delivered in 1998 and 1999.

                                In July 1997, the Company  entered into a series
                                of interest rate swap contracts in the amount of
                                $39.8  million.   The  swaps  were  executed  by
                                purchasing six contracts  maturing between March
                                and September 1998 with Bombardier,  Inc. as the
                                counter  party.   The  interest  rate  hedge  is
                                designed  to  limit  approximately  50%  of  the
                                Company's  exposure  to  interest  rate  changes
                                until permanent financing for its second six CRJ
                                aircraft,   which  are  scheduled  for  delivery
                                between March and September 1998, is secured. At
                                December 31, 1997, had all contracts  settled on
                                that date, the Company would have been obligated
                                to pay  the  counter  party  approximately  $1.4
                                million.  Gains  or  losses  resulting  from the
                                interest  rate swap  contracts  will be deferred
                                until the contracts are settled.

                                Maintenance Facility

                                In  June  1997,   the   Industrial   Development
                                Authority of Loudoun  County,  Virginia  ("IDA")
                                approved a $9.4 million tax exempt bond issuance
                                in  connection   with  the  Company's   proposed
                                construction   of  a  maintenance   facility  at
                                Washington-Dulles. These bonds were issued under
                                a  variable   interest  rate   structure  for  a
                                twenty-five  year term  including a  requirement
                                for a monthly  sinking fund  provision,  and are
                                collateralized  by  a  $9.6  million  letter  of
                                credit  issued  on behalf  of the  Company  by a
                                financial  institution.  The letter of credit is
                                collateralized  by $4.9 million of the Company's
                                line of credit and the Company's  leasehold deed
                                of  trust  on  the  maintenance  facility.   The
                                Company  will be  obligated  to pay rent for the
                                facility and the underlying land leasehold,  the
                                proceeds  from  which  the  IDA  will  make  the
                                required interest and sinking fund payments.  In
                                the event of a  default,  the  Company  would be
                                obligated to reimburse the financial institution
                                to the  maximum  amount of the letter of credit.
                                Annual rent is subject to escalation  every five
                                years.  In February 1998,  the Company  occupied
                                this building and began paying rent.

11.    Restructuring Charges 

          In 1994 the Company commenced a major restructuring plan. The basis of
          the plan was to simplify the fleet by eliminating the EMB-120
          and Dash-8  aircraft  fleets in  conjunction  with the  elimination of
          unprofitable  routes, the consolidation of maintenance bases and other
          cost saving  measures.  As a result,  the Company  established  an $11
          million reserve for restructuring  costs in 1994. The Company reversed
          $521,000  and  $426,000 of  reserves  in 1995 and 1996,  respectively.
          There are no remaining reserves on the Company's balance sheet related
          to the restructuring.

12.    Litigation  

          The  Company  is a  party  to  routine  litigation  incidental  to its
          business,  none of which is  likely to have a  material  effect on the
          Company's financial position.

     The  Company is a party to an action pending in the United States  District
          Court for the  Southern  District  of Ohio known as Peter J.  Ryerson,
          administrator  of the  estate  of David  Ryerson,  v.  Atlantic  Coast
          Airlines,  Case No.  C2-95-611.  On March 10, 1997,  the Court granted
          Plaintiff's  motion to the effect that liability  would not be limited
          to those damages available under the Warsaw Convention. The Company is
          currently  unable to estimate the monetary  award,  if any,  resulting
          from this litigation,  but believes it remains fully covered under the
          Company's insurance policy.
         
          The Company is also a party to an action  pending in the United States
          Court of Appeals  for the Fourth  Circuit  known as Afzal v.  Atlantic
          Coast Airlines,  Inc. (No.  98-1011).  This action is an appeal of the
          December  1997  decision  granted  in favor of the  Company  in a case
          claiming  wrongful  termination  of  employment  brought in the United
          States  District  Court for the Eastern  District of Virginia known as
          Afzal v. Atlantic Coast Airlines,  Inc. (Civil Action No.  96-1537-A).
          The  Company  does not  expect  the  outcome  of this case to have any
          material  adverse effect on its financial  condition or results of its
          operations.


13.    Related Party Transactions

          The Company paid approximately $25,000 for the year ended December 31,
          1995 in  consulting  fees to The Acker Group,  a Company
          owned by one of the  Company's  officers/stockholders.  The  agreement
          under which the fees were paid ended as of February 1995.

14.    Financial Instruments  

          In  December  1995,  the  Company   adopted   Statement  of  Financial
          Accounting Standards No. 107, "Disclosure of Fair Value of
          Financial Instruments" (SFAS 107). SFAS 107 requires the disclosure of
          the fair value of financial  instruments;  however,  this  information
          does not represent  the aggregate net fair value of the Company.  Some
          of the  information  used to determine  fair value is  subjective  and
          judgmental in nature; therefore, fair value estimates,  especially for
          less marketable securities, may vary. The amounts actually realized or
          paid upon settlement or maturity could be significantly different.
                                 
          Unless quoted  market price  indicates  otherwise,  the fair values of
          cash  and  cash  equivalents  and  short  term  investments  generally
          approximate market because of the short maturity of these instruments.
          The  Company has  estimated  the fair value of long term debt based on
          quoted market prices.

          The estimated fair values of the Company's financial instruments, none
          of which are held for  trading  purposes,  are  summarized  as follows
          (brackets denote liability):
<TABLE>

                                 ----------------------------------------------------------------------------------------------
                                 (in thousands)
                                 ----------------------------------------------------------------------------------------------
                                                                       December 31, 1996               December 31, 1997
<CAPTION>
                                 ------------------------------- ------------------------------ -------------------------------
                                                                  Carrying      Estimated         Carrying     Estimated
                                                                   Amount       Fair Value         Amount      Fair Value
                                                                --------------- --------------- -------------- ----------------
<S>                                                                  <C>             <C>            <C>            <C>      
                                 Cash and cash equivalents           $21,470         $21,470        $39,167        $  39,167
                                 Short-term investments                    -               -         10,737           10,737
                                 Long-term debt                      (3,726)         (3,912)       (75,706)        (120,125)
                                 ------------------------------ --------------- --------------- -------------- ----------------

</TABLE>

15.    Supplemental Cash Flow Information         

Year ended December 31, (in thousands)
Supplemental disclosures of cash flow information:
                           
             
           
Cash paid during the period for:                              
<TABLE>
<CAPTION>

                                                                       1995                    1996                  1997
                                                                      ----                    ----                  ----
<S>                              <C>                            <C>             <C>                  <C>   

                                       - Interest                  $1,804                  $   883                $1,778
                                       - Income taxes                  190                   1,319                 5,767
                                 ------------------------------ --------------- -------------------- --------------------------
</TABLE>

                                 The following non cash  investing and financial
                                 activities took place in 1995, 1996 and 1997:

                                 In 1995,  the Company  acquired $2.3 million in
                                 rotable parts under  capital lease  obligations
                                 and by  issuing  notes.  These  purchases  were
                                 financed by suppliers.

                                 In December 1995, the Company accrued dividends
                                 of   $335,000   on  its  Series  A   Cumulative
                                 Convertible Preferred Stock (see Note 7).

                                 In 1996,  the Company  acquired $1.2 million in
                                 rotable  parts,  ground  equipment,   telephone
                                 system  upgrades and  Director's  and Officer's
                                 Liability   Insurance   under   capital   lease
                                 obligations   and  by  issuing   notes.   These
                                 purchases   were   financed  by  suppliers  and
                                 outside lenders.

                                 In 1997,  the Company  acquired $2.9 million in
                                 rotable parts,  spare engines,  market planning
                                 software and other fixed assets and  expendable
                                 parts  under  capital  lease   obligations  and
                                 through the use of manufacturers credits. As of
                                 December  31,  1997,   there  was  a  remaining
                                 balance  of  $700,000  in  unused  manufacturer
                                 credits which is reflected in prepaid  expenses
                                 and other current assets.

                                 In November  1997,  the Company  received  $4.3
                                 million in additional  manufacturers credits of
                                 which  $261,000 was received in cash by the end
                                 of 1997  leaving a balance of $4.1  million due
                                 from the  manufacturer as of December 31, 1997.
                                 Such  amount  has  been   classified  as  other
                                 assets.


16. Year 2000 Compliance

          The Company has started to review its computer systems and application
          programs for year 2000  compliance.  The Company  believes
          that  the  cost  to  modify  any  of  its  non-compliant   systems  or
          applications will not have a material effect on its financial position
          or results of its  operations.  However,  the Company can not give any
          assurances  that the systems of other  parties  upon which the Company
          must rely, will be year 2000 compliant on a timely basis.  Examples of
          systems  operated  by others that the Company may use and or rely upon
          are: FAA Air Traffic Control,  Computer Reservation Systems for travel
          agent sales and United Airlines'  reservation,  passenger check in and
          ticketing systems. The Company's business,  financial condition and or
          results of operations  could be materially  adversely  affected by the
          failure of its systems and applications or those operated by others.

17.   Subsequent Events

          In January 1998,  holders of approximately $5.9 million face amount of
          the 7% Convertible Subordinated Notes ("Notes") exercised their
          option to  convert  the Notes  into  330,413  shares of the  Company's
          common  stock.  On March 3, 1998,  the Company  notified the remaining
          holders of the Notes that the  Company  was  reducing  the  conversion
          price in order to induce the Note  holders to redeem  their  Notes for
          common stock.  The Note holders have until April 8, 1998 to accept the
          Company's inducement. The Company will record a non-operating one time
          charge  for the  fair  value  of the  cost of the  inducement.  If all
          holders of the Notes accept the Company's  inducement,  the fair value
          of the cost of the inducement would be approximately $2.3 million.
                                 

          In January 1998, the Company  entered into a contract to purchase fuel
          from United Aviation Fuels Company ("UAFC"), a wholly-owned subsidiary
          of United Airlines during the period February through  September 1998.
          The Company has committed to purchase 33,000 barrels of fuel per month
          during the term of this contract at a delivered  price excluding taxes
          and into plane  fees of 52.2  cents per  gallon.  In March  1998,  the
          Company  extended the contract  through  December 1998,  committing to
          purchase  33,000 barrels per month,  October  through  December,  at a
          delivered price excluding taxes and into plane fees of 50.35 cents per
          gallon. Fuel purchased under this arrangement represents approximately
          46% of the Company's anticipated 1998 fuel requirements.
                                 
          On March 4, 1998,  the Company  agreed to a one-year  extension  until
          March 31, 1999 of its code sharing  agreements  with United  Airlines,
          Inc.

          On March 4, 1998, the Company  converted five  conditional  orders for
          CRJ's into firm  deliveries.  With this change,  the Company will take
          delivery  of nine CRJ's in 1998 and an  additional  nine in 1999.  The
          Company  also has options for 25  additional  CRJ's.  The Company took
          delivery under operating leases,  one CRJ in January and one in March,
          1998.
       
18.  Recent Accounting
       Pronouncements           

          Recently,  the  American  Institute of  Certified  Public  Accountants
          issued a proposed  statement  of position on  accounting  for start-up
          costs, including preoperating costs related to the introduction of new
          fleet types by airlines.  The  proposed  accounting  guidelines  would
          require  companies to expense  start-up  costs as  incurred.  The FASB
          recently  approved the proposed  guidelines  and they will take effect
          for fiscal years  beginning  after  December 15, 1998. The Company has
          deferred  certain  start-up costs related to the  introduction  of the
          CRJs and is amortizing  such costs to expense ratably over four years.
          The  Company  will be  required  to expense  any  unamortized  amounts
          remaining as of January 1, 1999.  The Company  estimates the remaining
          unamortized  balance for deferred start-up costs will be approximately
          $1.4 million on January 1, 1999.


19.  Selected
     Quarterly
     Financial Dat
     (Unaudited)         

<TABLE>
(in thousands, except per share amounts)
                                                                       Quarter Ended
<CAPTION>
                                                   March 31,              June 30,       September 30,         December 31,
                                                      1997                   1997              1997                  1997
<S>                                                 <C>                  <C>             <C>                   <C>    
       Operating revenues                           $41,114              $53,220             $54,864                $56,246
       Operating income                               1,037                9,968               9,054                  8,884
       Net income                                       703                5,885               4,844                  3,068
       Net income per share
          Basic                                    $   0.08             $   0.69            $   0.68               $   0.43
          Diluted                                  $   0.08             $   0.67            $   0.51               $   0.34
       Weighted average shares
            outstanding                               8,501                8,510               7,093                  7,197

</TABLE>
<TABLE>
                                                                       Quarter Ended
        
<CAPTION>
                                                   March 31,               June 30,       September 30,         December 31,
                                                     1996                    1996                 1996                 1996
<S>                                                 <C>                  <C>                 <C>                <C>    
       Operating revenues                           $37,857              $50,366             $49,541                $44,720
       Operating income                               1,118                9,203               7,674                  2,268
       Net income                                       862                8,464               7,131                  2,701
       Net income per share
          Basic                                    $   0.10             $   1.00            $   0.84               $   0.32
          Diluted                                  $   0.10             $   0.96            $   0.81               $   0.31
       Weighted average shares
            outstanding                               8,355                8,467               8,477                  8,479

</TABLE>

<PAGE>


Item 9.  Changes in and Disagreements with Accountants on Accounting and 
         Financial Disclosure

         Reference is hereby made to the Company's Form 8K Item 4. filed October
         29, 1997.

                                                                             
PART III

                  The  information  required  by this Part III (Items 10, 11, 12
and 13) is hereby incorporated by reference from the Company's  definitive proxy
statement  which is  expected  to be filed  pursuant  to  Regulation  14A of the
Securities  Exchange  Act of 1934 not later  than 120 days  after the end of the
fiscal year covered by this report.

                                                                              
PART IV

Item 14. Exhibits, Financial Statement Schedules and Reports on Form 8-K

         (a)      1.       Financial Statements

                           The Consolidated  Financial Statements listed in the 
                           index in Part II, Item 8, are filed as part of this 
                           report.

                  2.       Consolidated Financial Statement Schedules

                           Reference   is  hereby   made  to  the   Consolidated
                          Financial  Statements and the Notes thereto  included 
                           in this filing in Part II, Item 8.

                  3.       Exhibits

<TABLE>
<CAPTION>
Exhibit
Number                       Description of Exhibit
<S>                          <C>   

3.1  (note 6)           Restated Certificate of Incorporation of the Company.
3.1(a)  (note 4)        Certificate of Correction to the Restated Certificate of Incorporation.
3.2  (note 4)           Restated By-laws of the Company.  
4.1  (note 7)                  Specimen Common Stock Certificate.
4.2  (note 7)                  Stockholders' Agreement, effective as of October 15, 1991, among the Company, the stockholders and
                               the holder of warrants of the Company named on the signature pages thereto and a trust established 
                               pursuant to the Atlantic Coast Airlines, Inc. Employee Stock Ownership Plan, together with Amendment
                               and Second Amendment thereto dated as of February 24, 1992 and May 1, 1992 respectively.
4.3  (note 7)                  Registration Rights Agreement, dated as of September 30, 1991,among the Company and the stockholders
                               named on the signature pages thereto(the "Stockholders Registration Rights Agreement").
4.4  (note 7)                  Form of amendment to the Stockholders Registration Rights Agreement.
4.17  (note 3)                 Indenture, dated as of July 2, 1997, between the Company and First Union National Bank of Virginia
4.18  (note 3)                 Registration Rights Agreement, dated as of July 2, 1997, by and among the Company, Alex. Brown & Sons
                               Incorporated and the Robinson-Humphrey Company, Inc.
10.1  (note 7)                 Atlantic Coast Airlines, Inc. 1992 Stock Option Plan.
10.2  (note 4)                 Restated Atlantic Coast Airlines, Inc. Employee Stock Ownership Plan, effective October 11, 1991, as 
                               amended through December 31, 1996.
10.4  (note 4)                 Restated Atlantic Coast Airlines 401(k) Plan, as amended through February 3, 1997.
10.4(a) (note 1)               Amendment to the Atlantic Coast Airlines 401(k) Plan effective May 1, 1997
10.6 (notes 7 & 8)             United Express Agreement, dated October 1, 1991, among United Airlines, Inc., Atlantic Coast Airlines
                               and the Company, together with Amendment No. 1, dated as of April 1, 1993.
10.6(a) (note 1)               Third Amendment to United Express Agreement, dated March 3, 1998, among United Airlines, Inc., 
                               Atlantic Coast Airlines and the Company.
10.7 (notes 7 & 8)             Agreement to Lease British Aerospace Jetstream-41 Aircraft, dated December 23, 1992, between British 
                               Aerospace, Inc. and Atlantic Coast Airlines.
10.12(b)  (note 5)             Amendment and Restated Severance Agreement, dated as of October 18, 1995 between the Company and 
                               Kerry B. Skeen.
10.12(c)  (note 4)             First Amendment To Severance Agreement For Kerry B. Skeen effective as of October 16, 1996.
10.12(h)  (note 4)             Form of Severance Agreement.  The Company has entered into substantially identical agreements with 
                               Thomas J. Moore and with Michael S. Davis, both dated as of January 1, 1997, and with Paul H. Tate, 
                               dated as of February 1, 1998.
10.13(a)  (note 4)             Form of Indemnity Agreement.The Company has entered into substantially identical agreements with the 
                               individual members of its Board of Directors.
10.20  (note 6)                Stock Purchase Agreement, dated the 30th day of December 1994, by and among JSX Capital Corporation, 
                               Atlantic Coast Airlines, and Atlantic Coast Airlines, Inc.
10.21  (note 6)                Acquisition Agreement, dated as of December 30, 1994, by and among Jetstream Aircraft, Inc., JSX
                               Capital Corporation, and Atlantic Coast Airlines.
10.21(a)  (note 4)             Amendment Number One to Acquisition Agreement, dated as of June 17, 1996, by and among Jetstream 
                               Aircraft, Inc., JSX Capital Corporation, and Atlantic Coast Airlines.
10.23  (note 4)                Loan and Security Agreement, dated as of October 12, 1995, between Atlantic Coast Airlines and
                               Shawmut Capital Corporation.
10.23(a) (note 1)              First Amendment to Loan and Security Agreement dated June 1, 1997 among the Company, Atlantic Coast
                               Airlines, and Fleet Capital Corporation.
10.23(b) (note 1)              Second Amendment to Loan and Security Agreement dated December 1, 1997 among the Company, Atlantic 
                               Coast Airlines, and Fleet Capital Corporation.
10.24  (note 5)                Stock Incentive Plan of 1995.
10.25  (note 5)                Form of Incentive Stock Option Agreement.  The Company enters into this agreement with employees who 
                               have been granted incentive stock options pursuant to the Stock Incentive Plans.
10.26  (note 5)                Form of Non-Qualified Stock Option Agreement. The Company enters into this agreement with employees
                               who have been granted non-qualified stock options pursuant to the Stock Incentive Plans.
10.27  (note 5)                Split Dollar Agreement, dated as of December 29, 1995, between the Company and Kerry B. Skeen.
10.27(a)  (note 4)             Form of Split Dollar Agreement.The Company has entered into substantially identical agreements with 
                               Thomas J. Moore and with Michael S.Davis,both dated as of July 1, 1996, and with Paul H. Tate, dated 
                               as of February 1, 1998.
10.29  (note 5)                Agreement of Assignment of Life Insurance Death Benefit As Collateral,dated as of December 29, 1995, 
                               between the Company and Kerry B. Skeen.
                               10.29(a)  (note 4) Form of Agreement of Assignment  of Life  Insurance
                               Death   Benefit  As   Collateral.   The  Company   has  entered   into
                               substantially  identical  agreements  with  Thomas  J.  Moore and with
                               Michael S.  Davis,  both  dated as of July 1,  1996,  and with Paul H.
                               Tate, dated as of February 1, 1998.
10.31  (note 4)                Summary of Senior Management Bonus Program. The Company has adopted a plan in substantially the form 
                               as outlined in this exhibit for 1998 and 1997.
10.32  (note 1)                Summary of "Share the Success" Profit Sharing Plan.  The Company has adopted a plan in substantially 
                               this form for 1998, 1997 and 1996.
10.40 (notes 4 & 8)            Purchase Agreement between Bombardier Inc. and Atlantic Coast Airlines Relating to the Purchase of 
                               Canadair Regional Jet Aircraft dated
                               January 8, 1997.
10.50(a) (note 1)              Form of Purchase Agreement, dated September 19, 1997, among the Company, Atlantic Coast Airlines, 
                               Morgan Stanley & Co. Incorporated and First
                               National Bank of Maryland, as Trustee.
10.50(b) (note 1)              Form of Pass Through Trust Agreement, dated as of September 25, 1997, among the Company, Atlantic 
                               Coast Airlines, and First National Bank of Maryland, as Trustee.
10.50(c) (note 1)              Form of Pass Through Trust Certificate.
10.50(d) (note 1)              Form of Participation Agreement, dated as of September 30, 1997, Atlantic Coast Airlines, as Lessee 
                               and Initial Owner Participant, State Street Bank and Trust Company of Connecticut, National 
                               Association, as Owner Trustee, the First National Bank of Maryland, as Indenture Trustee, 
                               Pass-Through Trustee, and Subordination Agent, including, as exhibits thereto, Form of Lease 
                               Agreement, Form of Trust Indenture and Security Agreement, and Form of Trust Agreement.
10.50(e) (note 1)              Guarantee, dated as of September 30, 1997, from the Company.
10.60  (note 4)                Form of Lease Agreement between Atlantic Coast Airlines and Finova Capital Corporation. The Company 
                               has entered into four substantially identical agreements during 1996 for four J-41 aircraft.
10.80 (note 1)                 Ground Lease Agreement Between The Metropolitan Washington Airports Authority And Atlantic Coast 
                               Airlines dated as of June 23, 1997 
10.90 (notes 1 & 8)            Schedule and Exhibits to ISDA Master Agreement between the Company and Bombardier Inc. dated as of 
                               July 11, 1997.
11.1                           Computation of Per Share Income.
21.1  (note 7)                 Subsidiaries of the Company.
23.1  (note 1)                  Consent of KPMG Peat Marwick.
23.2  (note 1)                 Consent of BDO Seidman.


<FN>
Notes

(1)           To be filed as an Amendment to this Annual Report on Form 10-K for the fiscal year ended December 31, 1997.
(2)           Filed as an Exhibit to the Amendment to the Annual Report on form 10-K/A filed on November 25, 1997, incorporated 
              herein by reference.
(3)           Filed as an Exhibit to the Quarterly Report on Form 10-Q for the three month period ended June 30, 1997, incorporated
              herein by reference.
(4)           Filed as an Amendment to the Annual Report on Form 10-K for the fiscal year ended December 31, 1996, incorporated 
              herein by reference.
(5)           Filed as an Exhibit to the Annual report on Form 10-K for the fiscal year ended December 31, 1995, incorporated herein
              by reference.
(6)           Filed as an Exhibit to the Annual Report on Form 10-K for the fiscal year ended December 31,1994, incorporated herein 
              by reference.
(7)           Filed as an Exhibit to Form S-1, Registration No. 33-62206, effective July 20, 1993, incorporated herein by reference.
(8)           Portions of this document have been omitted pursuant to a request for confidential treatment that has been granted.


               Reports on Form 8-K.



                --------------------------------------------- ------------------------------------------------------------
                Date                                          Subject
                --------------------------------------------- ------------------------------------------------------------
                October 6, 1997                               Item 5.  Other Events:  Announcement of closing the sale
                                                              of $111.6 million of Pass Through Trust Certificates.
                October 29, 1997                              Item 4.  Change in Registrant's Certifying Accountants.

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










<PAGE>


                                   SIGNATURES

          Pursuant to the  requirements of Section 13 of 15(d) of the Securities
          Exchange Act of 1934, the registrant has duly caused this report to be
          signed on its behalf by the undersigned,  thereunto duly authorized on
          March 16, 1998.                    

                                                   ATLANTIC COAST AIRLINES, INC.
                                                                 /S/
                                                  By:  _________________________
                                                                 C. Edward Acker
                                                           Chairman of the Board 

                                                                                                       
Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following  persons on behalf of the  registrant and
in the capacities indicated on March 16, 1998.

Name                                                      Title


                  /S/                                        Chairman of the Board of Directors
- ---------------------------------------------------
C. Edward Acker


                 /S/                                         Director, President
- ---------------------------------------------------          and Chief Executive Officer
Kerry B. Skeen                                               (principal executive officer)

                                                          

                 /S/                                         Director, Executive Vice President
- ---------------------------------------------------          and Chief Operating Officer
Thomas J. Moore                                           


                 /S/                                         Senior Vice President, Treasurer and
- ---------------------------------------------------          Chief Financial Officer
Paul H. Tate                                                 (principal financial officer)
                                                          


                 /S/                                         Vice President, Financial Planning and Controller
- ---------------------------------------------------          (principal accounting officer)

David W. Asai                                             


                 /S/                                                     /S/ 
- ---------------------------------------------------       -----------------------------------------------------------
John Sullivan                                             Susan M. Coughlin
Director                                                  Director


                 /S/                                                    /S/ 
- ---------------------------------------------------       -----------------------------------------------------------
Robert Buchanan                                           James Kerley
Director                                                  Director


                 /S/                                                    /S/ 
- ---------------------------------------------------       -----------------------------------------------------------
Joseph Elsbury                                            James Miller
Director                                                  Director                                            
</FN>
</TABLE>



<TABLE>

       EXHIBIT 11.1

STATEMENT RE:  COMPUTATION OF PER SHARE INCOME
                                   (in thousands, except for earnings per share data)
                                                 1995                        1996                        1997
<CAPTION>
                                         Basic        Diluted        Basic        Diluted        Basic        Diluted
- ------------------------------------- ------------- ------------- ------------- ------------- ------------- -------------
<S>                                   <C>           <C>           <C>           <C>           <C>           <C>
Share calculation:
Average number of common shares
         outstanding                         8,342       8,342         8,481         8,481         7,824         7,824
Common stock equivalents due to
         assumed exercise of options             -         414             -           311             -           350
Common stock equivalents due to
         assumed conversion of                   -         546             -           128             -             -
         preferred stock
Common stock equivalents due to
         assumed conversion of                   -         568             -             -             -         1,582
         convertible debt
                                      ------------- ------------- ------------- ------------- ------------- -------------
Total common shares and common
         stock equivalents                   8,342       9,871         8,481         8,920         7,824         9,756
- ------------------------------------- ------------- ------------- ------------- ------------- ------------- -------------
Adjustments to net income:
Net income                               $  12,902   $  12,902     $  19,158     $  19,158      $ 14,500      $ 14,500
Less:  Preferred dividend
requirements based on average                (335)           -          (64)             -             -             -
number of preferred shares
Less:  Interest expense net of tax               -         237             -             -             -         1,187
- ------------------------------------- ------------- ------------- ------------- ------------- ------------- -------------

Net income available to common           $  12,567   $  13,139     $  19,094     $  19,158      $ 14,500      $ 15,686
shareholders

Income per share                       $      1.51  $             $             $             $     1.85    $     1.61
                                                          1.33          2.25          2.15
- ------------------------------------- ------------- ------------- ------------- ------------- ------------- -------------
</TABLE>



<TABLE> <S> <C>


<ARTICLE>                     5
<LEGEND>
     (Replace this text with the legend)
</LEGEND>
<CIK>                         0000904020
<NAME>                        ATLANTIC COAST AIRLINES, INC.
<MULTIPLIER>                                   1,000
<CURRENCY>                    US DOLLARS                
       
<S>                            <C>
<PERIOD-TYPE>                  12-MOS
<FISCAL-YEAR-END>                              DEC-31-1997
<PERIOD-START>                                 JAN-01-1997
<PERIOD-END>                                   DEC-31-1997
<EXCHANGE-RATE>                                1.000
<CASH>                                         39,167
<SECURITIES>                                   10,737
<RECEIVABLES>                                  21,890
<ALLOWANCES>                                     (269)
<INVENTORY>                                     2,477
<CURRENT-ASSETS>                               76,857
<PP&E>                                         49,364
<DEPRECIATION>                                 (8,726)
<TOTAL-ASSETS>                                 148,992
<CURRENT-LIABILITIES>                           31,680
<BONDS>                                         73,855
                          0
                                    0
<COMMON>                                       40,471
<OTHER-SE>                                     (5,666)
<TOTAL-LIABILITY-AND-EQUITY>                   148,992
<SALES>                                        202,540
<TOTAL-REVENUES>                               205,444
<CGS>                                          176,501
<TOTAL-COSTS>                                  176,501
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             3,450
<INCOME-PRETAX>                               26,839
<INCOME-TAX>                                   12,339
<INCOME-CONTINUING>                            14,500
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   14,500
<EPS-PRIMARY>                                    1.85
<EPS-DILUTED>                                    1.61
        

</TABLE>

<TABLE>
<S>     <C>    <C>    <C>    <C>    <C>    <C>
EXHIBIT 10.4(a)
                                AMENDMENT TO THE
                       ATLANTIC COAST AIRLINES 401(k) PLAN

Effective May 1 1997 Atlantic Coast Airlines  401(k) Plan -- Adoption  Agreement
Section E3 is hereby amended to incorporate the following:

E3       EMPLOYER'S MATCHING CONTRIBUTION (Plan Section 4.1)

         Determination of Matching Contribution

         [ ]      N/A. There shall be no matching contributions.
         [X]      The Employer shall make matching contirbtions equal to 25% of the
Participant's salary reductions.
         [ ] The Employer may make a discretionary  matching  contribution equal
to a percentage of the Participant's salary reductions.

         Limits on Matching Contribution

         [ ]      N/A. There will not be a limit on the matching contribution.
         [X]      In determining matching contributions, only salary reductions up to 4% of
a Participant's Compensation will be matched.
         [ ]      The matching contribution allocated to a Participant for any plan year shall            not
exceed $_____.

         Participants Eligible for Matching Contributions

         [ ]      N/A. There will not be a matching contribution.
         [ ]      Matching contibutions shall be made to all Participants.
         [ ]      Matching contributions shall be made to only Non-Highly Compensated
Employees.
         [X]      Matching contributions shall be made to only Non--Union Employees and                   Pilots.

         Service requirement for plan years beginning after 1989

         [ ]      N/A. There will not be a matching contribution.
         [ ]      A Year of Service shall be required to share in a matching contribution.
         [ ]      500 Hours of Service shall be required to share in a matching contirbution.
         [ X]     A Year of Service shall not be required to share in a matching
contribution.

         Service requirement for plan years beginning before 1990

         [X]      N/A, New Plan, or same as years beginning after 1989.
         [ ]      A Year of Service shall be required to share in a matching contribution.
         [ ]      A Year of Service shall not be required to share in a matching
contribution.

         Vesting of Matching Contributions

         [X] Matching contributions shall be subject to the vesting schedule for
Employer Contributions.
         [ ]      Matching contributions shall be 100% vested at all times.
         [ ]      Other _____________________

         Deferral Percentage Tests

         [ ]      N/A. There will not be matching contribution.
         [X] Matching contributions shall not be used in satisfying the deferral
percentage tests.
         [ ]      Matching contributions may be used in satisfying the deferral percentage
tests. (If used, full vesting and restrictions on withdrawals will apply, and the match will
be deemed an Elective Contribution).


Accepted By: ____________/s/______________
Atlantic Coasts Airlines
Date: _______June 28, 1997________________

</TABLE>

<TABLE>
<S>     <C>    <C>    <C>    <C>    <C>    <C>
   
EXHIBIT 10.6(a)

                                  March 3, 1998
    

United Air Lines, Inc.
P.O. Box 66100
Chicago, IL  60666
Attn:  Tom Hanley

         Re:      Third Amendment to United Express Agreement between United Air Lines, Inc. ("United"), Atlantic
                  Coast Airlines and Atlantic Coast Airlines, Inc. (collectively, "ACAI") dated October 1, 1991
                  as amended as of April 1, 1993 and as of October 14, 1994 (said agreement, as amended, the
                  "United Express Agreement")

Dear Tom:

         This letter is intended to confirm our  understanding  with  respect to
matters  contained  herein and, when  countersigned  by you, will  constitute an
amendment to the United Express Agreement.

         The parties agree that the term of the United Express  Agreement be and
hereby is  extended  such that the United  Express  Agreement  will  continue in
effect  through  March 31,  1999  unless it is  terminated  at an  earlier  date
pursuant to one or more of the provisions contained therein.

   
         United  further  agrees  that ACAI is  authorized  to  operate up to 23
regional jet aircraft,  50-seat  capacity,  as United Express under the terms of
the United  Express  Agreement.  ACAI  agrees  that it will work with  United to
facilitate  aircraft 23 to be transferred to another United Express  operator as
part of the initial  allotment of 30 regional  jets  provided by the United ALPA
agreement.  In that case, a 23rd aircraft would be made available to ACAI as the
first  aircraft  in the next  allotment.  The  deployment  of any  regional  jet
operated by ACAI must be approved on a city pair by city pair basis.
    

         We would appreciate  United's  signature below to confirm its agreement
to the terms outlined herein.

                                Very truly yours,
                          ATLANTIC COAST AIRLINES, INC.
                             ATLANTIC COAST AIRLINES
                        By:_____________________________
                                 Kerry B. Skeen,
                       President & Chief Executive Officer

Accepted and Agreed:
UNITED AIR LINES, INC.

By:____________________

   
Date:  March 3, 1998
    
</TABLE>

<TABLE>
<S>     <C>
EXHIBIT 10.23(a)
                                 FIRST AMENDMENT
                                       TO
                           LOAN AND SECURITY AGREEMENT

         THIS FIRST  AMENDMENT  TO LOAN AND  SECURITY  AGREEMENT  ("Amendment"),
dated as of the 1st day of June, 1997, made by and between

         FLEET CAPITAL  CORPORATION,  a Rhode Island  corporation  (successor by
merger with Fleet  Capital  Corporation,  a Connecticut  corporation,  which was
formerly known as Shawmut Capital Corporation) (the "Lender"),

         ATLANTIC COAST AIRLINES, a California corporation (the "Borrower"), and

         ATLANTIC COAST AIRLINES,  INC., a Delaware  corporation  (the "Parent";
the Borrower and the Parent being collectively called the "Loan Parties");

         to the Loan and Security  Agreement,  dated October 12, 1995 (the "Loan
Agreement"). All capitalized terms used herein without definition shall have the
meanings ascribed to such terms in the Loan Agreement.

                                    RECITALS
         RECITALS RECITALS
         A.  Pursuant to the Loan  Agreement,  and upon the terms and subject to
the conditions  contained therein, the Lender has made available to the Borrower
a $20,000,000 revolving line of credit evidenced by the Loan Agreement.

         B. The Industrial  Development  Authority of Loudoun  County,  Virginia
(the  "Issuer")  pursuant to an Indenture of Trust,  dated of even date herewith
("Indenture"),  between the Issuer and FMB Trust Company,  National Association,
as trustee (the "Bond  Trustee"),  has agreed to issue  $9,425,000  in aggregate
principal amount of the Issuer's  Variable Rate  Demand/Fixed Rate Revenue Bonds
(Atlantic Coast Airlines Project) Series 1997 (the "Bonds").

         C. Pursuant to a Financing Agreement (the "Bond Loan Agreement"), dated
of even date herewith,  between the Issuer and the Borrower, the proceeds of the
sale of the Bonds will be used by the Borrower for the purpose of financing  the
cost of  construction of a maintenance  facility and associated  access roadway,
vehicle  parking  and  maneuvering  areas  and  aircraft  paving  aprons on land
controlled by the Metropolitan  Washington  Airports Authority (the "Authority")
and forming part of the Washington Dulles International  Airport which is leased
by the  Authority to the Borrower  pursuant to a Ground Lease  Agreement,  dated
June 23, 1997 (the "Lease").



<PAGE>



                                                        24

         D. Pursuant to a Letter of Credit and Reimbursement Agreement, dated of
even date herewith (the  "Reimbursement  Agreement"),  among Fleet National Bank
(the "Bank"),  the Lender and the Borrower,  the Borrower has requested the Bank
to  issue  its  irrevocable,   transferable   direct-pay  letter  of  credit  in
substantially  the form of Exhibit A to the  Reimbursement  Agreement (the "Bond
Letter of Credit"), in the original undrawn amount of $9,579,932.

         E. In order to induce the Bank to issue the Bond Letter of Credit,  the
Bank has required  that the Lender join in the  execution  of the  Reimbursement
Agreement  and guaranty the  reimbursement  and other  obligations  owing by the
Borrower to the Bank thereunder.

         F. The Loan  Parties  have each  requested  that the Lender join in the
execution of the  Reimbursement  Agreement  and guaranty the  reimbursement  and
other obligations of the Borrower thereunder,  and the Lender has agreed to such
request,  provided,  among other things,  the Loan  Agreement and the other Loan
Documents are amended as herein provided.

         G. To  accomplish  the  foregoing  purposes,  the  parties  hereto  are
mutually desirous of amending the Loan Agreement as set forth herein .

                                    STATEMENT OF AGREEMENT

         NOW,  THEREFORE,  in  consideration  of the premises and other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
expressly acknowledged, the Loan Parties and the Lender hereby agree as follows:

                                    ARTICLE I

                          AMENDMENTS TO LOAN AGREEMENT

         The Loan Agreement is hereby amended as follows:

         1.1      Credit Facility.  Section 1, Credit Facility,  is amended by adding the following  Section 1.4 at
                  ---------------              ---------------
the end thereof:

                  "1.4.    Letters of Credit; Letter of Credit Guaranties.

                           1.4.1  Issuance  of  Letters  of Credit and Letter of
         Credit Guaranties. Lender agrees, for so long as no Default or Event of
         Default  exists and subject to the  provisions  of Section 9 below,  to
         issue its, or cause to be issued its Affiliate's, Letters of Credit and
         Letter of Credit Guaranties,  provided that the aggregate amount of the
         Letter of Credit  Obligations  outstanding at any time shall not exceed
         $10,500,000 and, without the prior written consent of Lender, no Letter
         of Credit or Letter of Credit Guaranty may have an expiration date that
         is  after  the  last day of the  Original  Term or the then  applicable
         Renewal Term.



<PAGE>


                           1.4.2  Reimbursement  Obligations.  All indebtedness,
         liabilities or obligations whatsoever arising or incurred in connection
         with any  Letter  of Credit  or  Letter  of  Credit  Guaranty  shall be
         incurred  solely as an  accommodation  to Borrower  and for  Borrower's
         account.  Borrower shall  reimburse  Lender for the total amount of all
         sums paid by Lender  under the terms of any  Letter of Credit or Letter
         of Credit Guaranty, any drawing or demand under any Letter of Credit or
         Letter of Credit Guaranty, or any additional or further liability which
         may  accrue  against  Lender in  connection  with a Letter of Credit or
         Letter of Credit  Guaranty,  immediately  upon the date of  payment  by
         Lender (either with the proceeds of a Revolver Loan obtained  hereunder
         or otherwise).  If Borrower shall fail to reimburse  Lender as provided
         herein,  the  unreimbursed  amount of such payment by Lender shall bear
         interest,  compounded  monthly,  at a per annum  rate equal to the same
         rate  applicable  to the  Revolver  Loans  until such amount is paid in
         full.  The  reimbursement  obligations of Borrower  hereunder  shall be
         absolute and unconditional under all circumstances  irrespective of any
         rights of  set-off,  counterclaim  or defense to payment  Borrower  may
         claim or have against  Lender,  the beneficiary of the Letter of Credit
         or the  Letter  of Credit  Guaranty  drawn  upon or any  other  Person,
         including,  without limitation, (i) any defense based on any failure of
         Borrower  to  receive  consideration,   (ii)  the  legality,  validity,
         regularity  or  unenforceability  of the  Letter of Credit or Letter of
         Credit Guaranty or any agreement or instrument  related thereto,  (iii)
         any  amendment or waiver of any consent to departure  from the terms of
         the Letter of Credit or any Letter of Credit  Guaranty or any agreement
         or  instrument  related  thereto,  (iv) any  statement,  draft or other
         document  presented  under a Letter  of  Credit  or  Letter  of  Credit
         Guaranty proving to be forged,  fraudulent,  invalid or insufficient in
         any respect, or any statement therein being untrue or inaccurate in any
         respect whatsoever,  except if resulting from Lender's gross negligence
         in accepting any such forged or fraudulent  draft or document,  (v) the
         surrender or impairment of any Collateral, or (vi) the existence of any
         claim,  setoff,  defense or other right which Borrower may have against
         the  beneficiary of a Letter of Credit or Letter of Credit  Guaranty or
         any other Person,  whether in connection  with any of the agreements or
         documents related thereto or otherwise.



<PAGE>


                  1.4.3 Rights and Remedies.  In the event of Borrower's failure
         to  reimburse  Lender  for the total  amount of all sums paid by Lender
         under the terms of any  Letter of Credit or Letter of Credit  Guaranty,
         any  drawing  or demand  under any Letter of Credit or Letter of Credit
         Guaranty  or any  additional  or  further  liability  which may  accrue
         against  Lender in  connection  therewith,  Lender,  in addition to its
         rights  under  the  Code  and  under  this  Agreement,  shall  be fully
         subrogated  to the rights of the  issuer of the Letter of Credit  under
         the  agreement  made with  Borrower  relating  to the  issuance of such
         Letter of Credit,  each such  agreement  being  incorporated  herein by
         reference, and Lender shall be entitled to exercise all such rights and
         remedies thereunder and under law in such regard as fully as if it were
         the issuer of the  Letter of  Credit.  If any Letter of Credit is drawn
         upon to discharge any obligation of Borrower to the beneficiary of such
         Letter of Credit, in whole or in part, Lender shall be fully subrogated
         to the rights of such  beneficiary  with respect to the  obligation  of
         Borrower to such beneficiary to the extent discharged with the proceeds
         of such Letter of Credit.

                  1.4.4 Indemnification.  Borrower hereby unconditionally agrees
         to indemnify  Lender and hold Lender  harmless from any and all losses,
         claims or  liabilities  arising from any  transactions  or  occurrences
         relating  to the  Letters of Credit or the Letter of Credit  Guaranties
         issued, established, opened or accepted for Borrower's account, and any
         drafts or acceptances thereunder,  and all Letter of Credit Obligations
         incurred in  connection  therewith.  This  indemnity  shall survive the
         payment  in full of all  amounts  payable to Lender  hereunder  and the
         termination of this Agreement.

                  1.4.5  Termination.  In  the  event  that  this  Agreement  is
         terminated  for any  reason by  either  party as  herein  provided,  in
         addition to Lender's  other  rights  under this  Agreement,  unless all
         outstanding  Letters  of Credit  and  Letter of Credit  Guaranties  are
         terminated or cancelled and Lender and its Affiliates released from all
         liability thereunder, Lender shall be entitled to pay and discharge all
         Letter of Credit Obligations with respect to all outstanding Letters of
         Credit  and Letter of Credit  Guaranties  which are not  terminated  or
         cancelled,  whether such Letter of Credit  Obligations  are absolute or
         contingent,  and all sums paid by Lender in connection  therewith shall
         be deemed to have been loaned by Lender to Borrower as a Revolver Loan,
         shall be secured by all of the  Collateral  and shall bear interest and
         be payable at the same rate and in the same manner as Revolver Loans."

         1.2       Letter of Credit and Letter of Credit Guaranty Fees. Section  2.2,  Fees,  is amended by
adding the following Sections 2.2.3 and 2.2.4 at the end thereof:

                  "2.2.3.  Letter of Credit and Letter of Credit  Guaranty  Fees.  Borrower  shall pay the
         following  fees for all  Letters of Credit and Letter of Credit  Guaranties  issued by Lender and
         its Affiliates pursuant to Section 1.4.1 hereof:

                           (i) Upon  issuance  of the Bond  Letter of Credit and
                  the  Bond  Letter  of  Credit  Guaranty,  fees  to Bank in the
                  amounts  and on the dates as set forth in Section  2.03 of the
                  Reimbursement Agreement;

                           (ii) Upon issuance of each other Letter of Credit and
                  Letter of Credit Guaranty:



<PAGE>


                  Consolidated Adjusted Net
                  Earnings From Operations                                         Per Annum Fee

                                    (a)  an  issuance  fee  to  Lender  for  the
                           account of both Lender and its Affiliate  that issues
                           such other  Letter of Credit  equal to the greater of
                           (a) $500 or (b) three percent (3%) per annum (or such
                           lesser percentage as Lender shall, in the exercise of
                           its sole  discretion,  agree in  writing at or before
                           the date of issuance)  of the undrawn  amount of such
                           Letter  of  Credit,   payable  in  advance  upon  the
                           issuance of each other Letter of Credit and Letter of
                           Credit  Guaranty and on each  extension of the stated
                           termination  date  thereof  for so long as such other
                           Letter of Credit  and  Letter of Credit  Guaranty  is
                           outstanding; and

                                    (b) the  reasonable  and  customary  charges
                           from time to time of the issuer of such other  Letter
                           of Credit with respect to the issuance, notification,
                           amendment, transfer, administration, cancellation and
                           conversion of, and drawings under,  such other Letter
                           of  Credit,  all of which  shall be payable to Lender
                           for the account of such issuer.

                  All issuance fees in connection with each Letter of Credit and
         Letter of Credit  Guaranty  as set forth in Sections  2.2.3  (i)(a) and
         (ii)(a)  hereof  shall be deemed  fully earned upon the issuance of the
         Letter of Credit and Letter of Credit Guaranty and shall not be subject
         to rebate or proration  upon the  termination of this Agreement for any
         reason.

                  2.2.4  Interest on Unpaid Fees.  Any amount of fees payable by
         Borrower to Lender that is not paid when due shall bear interest,  from
         the date such amount of fees was due until the date of payment in full,
         at the rate applicable to the Revolver Loans outstanding,  payable upon
         demand and on the date of payment in full."

         1.3 Loan Requests. Section 3.1.1, Loan Requests, is amended by deleting
subsection  (ii)  in its  entirety  and by  substituting  in  lieu  thereof  the
following:



<PAGE>


                  "(ii) Unless payment is otherwise timely made by Borrower, the
         becoming due of any amount  required to be paid under this Agreement or
         any of the other Loan Documents, or under the Reimbursement  Agreement,
         whether  as  principal,  accrued  interest,  fees,  expenses  or  other
         charges,  including,  without limitation,  payments required to be made
         pursuant to Section  1.4.2 hereof and  payments  required to be made to
         Bank pursuant to Section 2.3 of the Reimbursement  Agreement,  shall be
         deemed  irrevocably  to be a request by Borrower for a Revolver Loan on
         the due date of,  and in an  aggregate  amount  required  to pay,  such
         principal,  accrued interest,  fees, expenses or other charges, and the
         proceeds of each such  Revolver  Loan may be disbursed by Lender by way
         of direct payment of the relevant Obligation.  Within a reasonable time
         after the payment by Lender of any  expenses or other  charges that are
         not of a routine or administrative  nature,  Lender shall give Borrower
         notice  thereof  and send to  Borrower  (if  available  to Lender)  any
         invoice  or  other  supporting  documentation  for  such  fee or  other
         charge."

         1.4      Cash  Collateral  Account.  Section  3.2,  Payments,  is amended by adding a new  Section  3.2.4,
Cash Collateral Account, as follows:

                  "3.2.4  Cash  Collateral  Account.  If at  any  time  the  Net
         Accounts  Availability,  when  added to the  amount  of  funds  then on
         deposit in the Cash Collateral  Account, is less than the amount of the
         Availability Reserve, then Borrower shall immediately pay to Lender, on
         Lender's demand, an amount equal to the difference to be held by Lender
         in the Cash Collateral  Account as security for the Obligations.  If at
         any time the amount of funds on deposit in the Cash Collateral Account,
         when added to the Net Accounts  Availability at such time, is more than
         the  Availability  Reserve,  then Lender shall release to Borrower that
         portion of the funds then on  deposit  in the Cash  Collateral  Account
         equal to such  excess,  if,  and only to the extent  that,  immediately
         before and after giving  effect to such release,  no Default,  Event of
         Default or Overadvance Condition has occurred and continues to exist."

         1.5      Term of  Agreement.  Section  4.1,  Term of  Agreement,  is  amended in its  entirety  to read as
                  ------------------                  ------------------
follows:

                  "4.1 Term of  Agreement.  Subject to  Lender's  right to cease
         making Loans to Borrower upon or after the occurrence of any Default or
         Event of Default,  this  Agreement  shall be in effect from the Closing
         Date through and including  September 30, 2000 (the  "Original  Term"),
         and this Agreement  shall  automatically  renew itself for one (1) year
         periods  thereafter  (each a  "Renewal  Term"),  unless  terminated  as
         provided in Section 4.2 hereof."

         1.6      Termination  Charges.  Section  4.2.4,  Termination  Charges,  is amended in its entirety to read
as follows:



<PAGE>



                  "4.2.4   Termination  Charges. On the effective date of termination of
                           --------------------
                           this  Agreement for any reason,  Borrower shall pay to Lender
                           (in  addition  to the  then  outstanding  principal,  accrued
                           interest  and  other  charges  owing  under the terms of this
                           Agreement and any of the other Loan  Documents) as liquidated
                           damages for the loss of the bargain and not as a penalty,  an
                           amount  equal to the  product  obtained  by  multiplying  the
                           highest  of the  Average  Monthly  Loan  Balance  during  the
                           immediately  preceding  12-month period ending with the month
                           immediately  preceding  the date of such  termination,  times
                                                                                   -----
                           one  percent  (1%) if  termination  occurs at any time during
                           the  Original  Term on or  before  September  30,  1998,  and
                           one-half of one percent (0.50%) if termination  occurs at any
                           time  thereafter  during  the  Original  Term or  during  any
                           Renewal Term;  provided,  however, in the event that Borrower
                                          --------   -------
                           pays any  amounts to Lender  pursuant  to Section 2.7 of this
                           Agreement as a result of a determination  by Lender that such
                           payment is required  thereunder,  Borrower may, within ninety
                           (90) days after Lender's giving  Borrower  written demand for
                           payment of any such amount,  terminate this Agreement without
                           the payment of any termination  fee; and provided  further in
                                                                --- --------  -------
                           the event that the credit  rating of Bank as  established  by
                           Standard  and Poor's,  Inc.  shall at any time while the Bond
                           Letter of Credit is  outstanding  fall  below an "a"  rating,
                           and, as a result of such reduced credit rating,  the variable
                           interest  rate  on the  Bonds  thereafter  remarketed  by the
                           Remarketing  Agent shall be  increased,  as  confirmed by the
                           written  certification of the Remarketing  Agent delivered to
                           Lender,  Borrower may,  within one hundred  twenty (120) days
                           after  the  increase  of  the  interest  rate  on  the  Bonds
                           remarketed  by  the   Remarketing   Agent,   terminate   this
                           Agreement and the foregoing  termination  charge shall be one
                           percent  (1%) of the Average  Monthly  Revolver  Loan Balance
                           during the immediately  preceding 12-month period ending with
                           the   month   immediately   preceding   the   date   of  such
                           termination.  If  termination  occurs  on the last day of the
                           Original  Term or any Renewal  Term,  no  termination  charge
                           shall be payable."

         1.7      Affirmative Covenants.    Section  8.1,  Affirmative  Covenants,  is  amended  by  adding  a  new
Section 8.1.9 at the end thereof as follows:

                  "8.1.9  Completion of Improvements.  Cause the construction of
         the  Improvements  to be carried on  continuously  and to complete  the
         Improvements  not later than the time required  therefor as required by
         the  terms  of  the  Lease.  The   Improvements   will  be  constructed
         substantially  in  accordance  with the plans and  specifications,  all
         applicable   ordinances  and  statutes  and  in  accordance   with  the
         requirements   of  all   regularly   constituted   authorities   having
         jurisdiction  over  the  same.  The  Improvements  will be  constructed
         entirely  on the  Realty and will not  encroach  upon or  overhang  any
         easement or right of way, nor upon any land not leased under the Lease,
         and the  Improvements  when erected shall be wholly within the building
         restriction lines, however established, and will not violate applicable
         use or other restrictions  contained in prior conveyances or applicable
         protective  covenants or  restrictions.  Borrower will promptly correct
         any  structural  defect in the  Improvements  or any  departure  in any
         material  respect  from the plans  and  specifications  not  previously
         approved by Lender.  Upon the completion of the  construction of all of
         the Improvements:

                           (i)  Borrower  shall  furnish  to Lender an  approved
                  written  certification of completion from Borrower's architect
                  in the form previously approved by Lender and such architect;


<PAGE>




                           (ii)  Borrower  shall  furnish such  certificates  of
                  public officials,  utility companies, and others as Lender may
                  reasonably request certifying that the Improvements located on
                  the Realty is  connected  to public  sewer,  public  water and
                  public electricity lines;

                           (iii)  Borrower shall furnish to Lender a copy of the
                  certificate  (or  certificates)  of  occupancy,  compliance or
                  completion   issued  by  the  governmental   authority  having
                  jurisdiction  over  the  Realty  with  respect  to  all of the
                  Improvements to be constructed upon the Realty;

                           (iv)  Borrower  shall  furnish to Lender for Lender's
                  approval,  a current  "as-built"  survey of the Realty and the
                  Improvements   which   shall  show  no  matters   which  would
                  materially   and   adversely   affect  the  operation  of  the
                  Improvements  as a  maintenance  facility  or  materially  and
                  adversely affect the value of the Improvements;

                           (v)  Borrower  shall  have  fully  paid all costs and
                  expenses  of  the   construction   and   development   of  the
                  Improvements   and   Borrower   shall   furnish  to  Lender  a
                  satisfactory  endorsement to Lender's title  insurance  policy
                  through the date of  completion  of the  Improvements  and the
                  payment in full of all costs and expenses of  construction  in
                  providing coverage against  materialman's and mechanics' liens
                  and against matters of survey; and

                           (vi)  Borrower  shall  furnish  to  Lender  certified
                  copies of Borrower's  casualty insurance policies with respect
                  to the Improvements located on the Realty,  together with loss
                  payable  endorsements on Lender's  standard form of loss payee
                  endorsement naming Lender as loss payee in accordance with the
                  provisions of this Agreement."

         1.8      Specific  Financial  Covenants.  Section 8.3,  Specific  Financial  Covenants,  is amended in its
entirety to read as follows:

                  "8.3.  Specific Financial  Covenants.  During the term of this
         Agreement,  and thereafter for so long as there are any  Obligations to
         Lender,  each Loan Party covenants that, unless otherwise  consented to
         by Lender in  writing,  it shall  comply with the  following  financial
         covenants:



<PAGE>






                           8.3.1  Consolidated  Adjusted Tangible Net Worth. The
                  Consolidated  Adjusted  Tangible Net Worth of the Loan Parties
                  shall not be less than the amount  shown  below as of the date
                  and for the period set forth below:



<PAGE>



                                                                       Consolidated Adjusted
                             Date or Period                             Tangible Net Worth



<PAGE>


                  Fiscal  quarter  ended  March  31,                    $30,000,000
                  1997

                  Fiscal quarter ended June 30, 1997                    $34,250,000

                  Fiscal  quarter  ended   September                    $38,000,000
                  30, 1997

                  Fiscal  year  ended  December  31,                    $39,000,000
                  1997

                  Fiscal  quarter  ended  March  31,                    $36,500,000
                  1998

                  Fiscal quarter ended June 30, 1998                    $42,750,000

                  Fiscal  quarter  ended   September                    $48,750,000
                  30, 1998

                  Fiscal  year  ended  December  31,                    $53,250,000
                  1998

                  Fiscal  quarter  ended  March  31,                    $51,000,000
                  1999

                  Fiscal quarter ended June 30, 1999                    $56,500,000



<PAGE>




                                                                      Consolidated Adjusted
                            Date or Period                             Tangible Net Worth

                  Fiscal  quarter  ended   September                    $63,000,000
                  30, 1999

                  Fiscal  year  ended  December  31,                    $65,000,000
                  1999   and  end  of  each   fiscal
                  quarter   of  each   fiscal   year
                  thereafter



<PAGE>



                           Provided,   however,   that  the  minimum  amount  of
                  Consolidated  Adjusted  Tangible  Net  Worth  required  to  be
                  maintained  by the Loan  Parties as set forth  above  shall be
                  reduced  to  the  extent  that  any  of  the  proceeds  of the
                  Subordinated Debt Offering are used contemporaneously from the
                  issuance  thereof for the  redemption of any Securities of the
                  Parent  which  are   excluded   from  the   definition   of  a
                  Distribution  and  therefore  permitted to be made by the Loan
                  Parties pursuant to Section 8.2.5 of this Agreement.

                           8.3.2  Profitability.  The Consolidated  Adjusted Net
                  Earnings from Operations of the Loan Parties shall not be less
                  than the  amount  shown  below  for the  period  corresponding
                  thereto:



<PAGE>


                                                              Consolidated Adjusted Net
                                 Period                       Earnings From Operations

                  First  fiscal  quarter  ended March                  $   700,000
                  31, 1997

                  First  two  fiscal  quarters  ended                  $ 5,100,000
                  June 30, 1997

                  First three fiscal  quarters  ended                  $ 8,750,000
                  September 30, 1997

                                                              Consolidated Adjusted Net
                                 Period                       Earnings From Operations



<PAGE>


                  Fiscal year ended December 31, 1997

                  $10,000,000First   fiscal   quarter                  ($ 2,750,000)
                  ended  March  31,  1998  and  first
                  fiscal   quarter   ended   of  each
                  fiscal year thereafter

                  First  two  fiscal  quarters  ended                  $ 3,750,000
                  June  30,  1998 and the  first  two
                  fiscal   quarters   ended  of  each
                  fiscal year thereafter

                  First three fiscal  quarters  ended                  $10,000,000
                  September  30,  1998 and the  first
                  three  fiscal   quarters  ended  of
                  each fiscal year thereafter

                  Fiscal  year  ended   December  31,                  $13,000,000
                  1998   and   each    fiscal    year
                  thereafter



<PAGE>



                  8.3.3   Consolidated   Debt  Service   Coverage   Ratio.   The
         Consolidated  Debt Service Coverage Ratio of the Loan Parties shall not
         be less  that  the  ratio  shown  below  for the  period  corresponding
         thereto:



<PAGE>


                                                              Consolidated Debt Service
                                 Period                              Coverage Ratio

                  Fiscal quarter ended March 31, 1997                  1.50 to 1.0

                  First  two  fiscal  quarters  ended                  1.75 to 1.0
                  June 30, 1997

                  First three fiscal  quarters  ended                  2.50 to 1.0
                  September 30, 1997

                  Fiscal year ended December 31, 1997                  2.50 to 1.0



<PAGE>


                                                              Consolidated Debt Service
                                 Period

                         Coverage  RatioFirst  fiscal         Negative 5.00 to 1.0
                         ---------------
                  quarter  ended  March 31,  1998 and
                  the first  fiscal  quarter  of each
                  fiscal year thereafter

                  First  two  fiscal  quarters  ended                  2.00 to 1.0
                  June  30,  1998 and the  first  two
                  fiscal   quarters  of  each  fiscal
                  year thereafter

                  First three fiscal  quarters  ended                  2.50 to 1.0
                  September  30,  1998 and the  first
                  three   fiscal   quarters  of  each
                  fiscal year thereafter

                  Fiscal  year  ended   December  31,                  2.50 to 1.0
                  1998   and   each    fiscal    year
                  thereafter



<PAGE>



                  8.3.4  Capital  Expenditures.  The Loan Parties shall not make
         Capital  Expenditures  (including,   without  limitation,   by  way  of
         capitalized  leases)  which,  in the aggregate  exceed the amount shown
         below for the period corresponding thereto:



<PAGE>


                                 Period                               Capital Expenditures

                  Fiscal year ended December 31, 1997                  $12,000,000

                  Fiscal year December 31, 1998                        $  7,000,000

                  Fiscal year  December  31, 1998 and                  $  9,500,000
                  each fiscal year thereafter



<PAGE>


         provided,   however,   there  shall  be  excluded  from  the  foregoing
         calculation  the  aggregate  amount  of  Capital  Expenditures  made by
         Borrower with the proceeds of the Bonds;  and provided further that any
         Capital  Expenditures  permitted to be incurred  during the fiscal year
         ending  December 31, 1997 or any  subsequent  fiscal year and which are
         not  incurred  during such fiscal year may be carried over and incurred
         in the following fiscal year (but not in any subsequent fiscal year).



<PAGE>


         1.9      Conditions Precedent.  Section 9, Conditions Precedent, is amended as follows:

                  (i) Section 9.2,  Conditions  Precedent to All Revolver Loans,
is amended by  deleting  the first  paragraph  thereof  in its  entirety  and by
substituting in lieu thereof the following:

                  "9.2 Conditions  Precedent to All Revolver  Loans,  Letters of
         Credit  and  Letter of Credit  Guaranties.  Notwithstanding  any of the
         provisions of this Agreement or the other Loan  Documents,  and without
         affecting in any manner the rights of Lender  under the other  sections
         of this Agreement, it is understood and agreed that Lender will have no
         obligation to make any Revolver Loan  (including  the initial  Revolver
         Loan) or issue or cause its  Affiliate to issue any Letter of Credit or
         Letter  of  Credit  Guaranty  unless  and  until,  in  addition  to the
         conditions  set forth in Sections  9.1 and 9.3,  each of the  following
         conditions has been and continue to be satisfied:"

                  (ii) Section 9.3, Waiver of Conditions  Precedent,  is amended
by  deleting  in  line  2 the  phrase  "Sections  9.1  and  9.2  hereof"  and by
substituting in lieu thereof the phrase "Sections 9.1, 9.2 and 9.4 hereof".

                  (iii) A new Section 9.4,  Conditions  Precedent to Issuance of
Bond Letter of Credit Guaranty, is added as follows:

                  "9.4.  Conditions  Precedent  to  Issuance  of Bond  Letter of
         Credit Guaranty.  Notwithstanding any other provision of this Agreement
         or the other Loan  Documents,  and without  affecting in any manner the
         rights of Lender  under the other  sections  of this  Agreement,  it is
         understood  and  agreed  that  Lender  shall have no  obligation  under
         Section 1.4 of this  Agreement to issue or cause its Affiliate to issue
         the Bond Letter of Credit or the Bond Letter of Credit  Guaranty on the
         Bond Letter of Credit  Closing  Date  unless and until,  in addition to
         each of the  conditions  elsewhere set forth in this Section 9, each of
         the following  conditions  shall have been  satisfied,  all in form and
         substance satisfactory to Lender and its counsel;

                           9.4.1  Documentation.  Lender shall have received the
         following documents,  each to be in form and substance  satisfactory to
         Lender and its counsel:



<PAGE>



                                    (i)  A  closing  certificate  signed  by  an
                  officer  of each of the  Loan  Parties,  dated  as of the Bond
                  Letter  of  Credit   Closing   Date,   stating  that  (a)  the
                  representations  and  warranties of the Loan Parties set forth
                  in this  Agreement  and the other Loan  Documents are true and
                  correct on and as of such date,  (b) each of the Loan  Parties
                  is on such  date  in  compliance  with  all of the  terms  and
                  provisions  set forth in this  Agreement  and the  other  Loan
                  Documents, and (c) no Default or Event of Default exists;

                                    (ii)    Copies  of each of the Bond  Documents  duly  executed  by the
                  parties thereto;

                                    (iii) The Deed of Trust,  duly recorded with
                  all fees and taxes thereon, if any, paid;

                                    (iv) A policy of title insurance, including,
                  without   limitation,   revolving   credit,   variable   rate,
                  comprehensive,  zoning and last dollar endorsements, issued by
                  a title insurance  company  satisfactory  to Lender,  with all
                  premiums  thereon  paid,  insuring  that  the  Deed  of  Trust
                  constitutes a valid and  enforceable  first priority Lien upon
                  Borrower's  leasehold estate in the Realty encumbered thereby,
                  free  and  clear  of  all  title   defects  and   encumbrances
                  whatsoever other than Permitted Liens applicable thereto;

                                    (v)  A  foundation   survey  of  the  Realty
                  showing no deed, building line, easement or any other property
                  covenant or ordinance violation whatsoever;

                                    (vi) A phase 1 environmental site assessment
                  relating  to  the  Realty,  together  with a  reliance  letter
                  addressed   to  Lender   allowing   Lender  to  rely  on  such
                  assessment;

                                    (viii)  UCC   financing   statements,   duly
                  executed by Borrower and filed in all jurisdictions  necessary
                  or  appropriate  to perfect the Lien of Lender in the personal
                  property encumbered by the Deed of Trust;

                                    (ix)  A  certificate  of  the  Secretary  of
                  Borrower,  certifying (i) that attached  thereto is a true and
                  complete  copy of the  resolutions  adopted  by the  board  of
                  directors of Borrower authorizing the execution,  delivery and
                  performance  of the First  Amendment to this Agreement and the
                  other Loan Documents executed in connection therewith, and the
                  consummation  of the  transactions  contemplated  by the  Bond
                  Documents,  and (ii) as to the incumbency  and  genuineness of
                  the signatures of each officer of Borrower executing the First
                  Amendment  to this  Agreement  and the  other  Loan  Documents
                  contemplated thereby;



<PAGE>



                                    (x)  A  certificate   of  the  Secretary  of
                  Parent,  certifying  (i) that  attached  thereto is a true and
                  complete  copy of the  resolutions  adopted  by the  board  of
                  directors of Parent  authorizing  the execution,  delivery and
                  performance  of the First  Amendment to this Agreement and the
                  other Loan Documents executed in connection therewith, and the
                  consummation  of the  transactions  contemplated  by the  Bond
                  Documents,  and (ii) as to the incumbency  and  genuineness of
                  the  signatures of each officer of Parent  executing the First
                  Amendment  to this  Agreement  and the  other  Loan  Documents
                  contemplated thereby;

                                    (xi)    Receipt  by  Lender  of an  opinion  of  counsel  to the  Loan
                  Parties; and

                                    (xii)  Such  other  instruments,  documents,
                  certificates,  opinions or assurances as Lender or its counsel
                  may reasonably  request in connection with the issuance of the
                  Bond  Letter of Credit  Guaranty  or to  evidence  or  confirm
                  compliance by Borrower with the conditions of this Agreement."


         1.10 Events of  Default.  Section  10,  Events of  Default,  Rights and
Remedies on Default, is amended as follows:

                  (i)      Section 10.1.1, Payment of Loans, is amended in its entirety to read as follows:

                  "10.1.1  Payment  of Loans  and  Amounts  for Cash  Collateral
         Account. Borrower shall fail to make any payment of principal, interest
         or premium,  if any, owing on the Loans, or any amounts to be paid into
         the Cash Collateral  Account  pursuant to Section 3.2.4 hereof,  within
         two (2) Business  Days of the due date  thereof  (whether due at stated
         maturity, on demand, upon acceleration or otherwise)."

                  (ii)     A new Section 10.1.19,  Reimbursement  Agreement, is added at the end of Section 10.1 as
                                                   ------------------------
follows:

                           "10.1.19  Default  Under  Reimbursement   Agreement.   There  shall  occur  any
         "Event of Default"  under the  Reimbursement  Agreement  as such term is defined in Section  6.01
         thereof."

                  (iii) Section 10.3,  Other Remedies,  is amended by adding the
following Section 10.3.6 at the end thereof:



<PAGE>






                           "10.3.6   Upon  the   occurrence   and   during   the
         continuance  of an Event of  Default,  Lender may also,  at its option,
         with  respect to the face amount of all Letters of Credit and Letter of
         Credit  Guaranties then  outstanding,  require Borrower to deposit with
         Lender funds equal to such undrawn face amount,  and if Borrower  fails
         promptly  to make such  deposit,  Lender may  advance  such amount as a
         Revolver  Loan.  Any such deposit or advance shall be held by Lender in
         the Cash Collateral Account as a reserve to fund future payments on the
         outstanding  Letters of Credit or Letter of Credit Guaranties.  At such
         time as all  Letters  of Credit and  Letter of Credit  Guaranties  have
         expired or have been cancelled or terminated,  any amounts remaining in
         the Cash  Collateral  Account shall be applied  against any outstanding
         Obligations,  or, to the extent all Obligations have been  indefeasibly
         paid in full, returned to Borrower."

         1.11     Notices. Section 11.8 is modified as follows:

                  (i)      In line three thereof, the phrase "or by facsimile" is deleted; and

                  (ii)     All  notices to the  Borrower  and the  Parent  shall be sent in the manner set forth in
Section 11.8 as modified hereby and addressed as follows:

                           If to Borrower:  Atlantic Coast Airlines
                                                     515-A Shaw Road
                                                     Sterling, Virginia 20166
                                                     Attention: Director of Treasury Management

                           If to Parent:             Atlantic Coast Airlines, Inc
                                                     515-A Shaw Road
                                                     Sterling, Virginia 20166
                                                     Attention: Senior Vice President and General Counsel

                           With a copy to:  Hazel & Thomas
                                                     3110 Fairview Park Drive
                                   Suite 1400
                          Falls Church, Virginia 22042
                       Attention: Carol C. Honigberg, Esq.

         1.12     Indemnity by Lender.      A new Section 11.15, Indemnity by Lender, is added as follows:



<PAGE>



                           "11.15  Indemnity by Lender.  Lender hereby agrees to
         indemnify Borrower against any liability, loss, damage or expense which
         Borrower  may suffer or occur as a result of Lender's  breach of any of
         its  warranties  and  representations  set forth in Section 4.02 of the
         Reimbursement  Agreement or Lender's  failure to comply with any of the
         covenants set forth in Section 5.03 of the Reimbursement  Agreement and
         Bank's  exercise of its rights under Section 6.02 of the  Reimbursement
         Agreement as a result thereof."

1.13     Definitions.      Appendix A, General Definitions, is amended as follows:

                  (i)      The following definitions are amended in their entirety:

                  "Availability Reserve - On any date of determination  thereof,
         an amount equal to the sum of (i) any amounts of past due rent or other
         charges  (other than project rental as specified in the Lease) owing at
         such  time by  Borrower  to the  Authority  under the  Lease;  (ii) any
         amounts which  Borrower is obligated to pay pursuant to the  provisions
         of the Loan Documents but does not pay when due and which Lender elects
         to pay  pursuant  to any of the  Loan  Documents  for  the  account  of
         Borrower; (iii) the estimated cost of services ordered by Borrower from
         United under the United Express Emergency Response Agreement;  (iv) the
         Fixed Bond  Letter of Credit  Guaranty  Reserve  at such date;  (v) the
         Increasing  Bond Letter of Credit  Guaranty  Reserve at such date; (vi)
         the amount of all Letter of Credit Obligations outstanding at such date
         except for those with respect to the Bond Letter of Credit and the Bond
         Letter of Credit  Guaranty;  and (vii)  such  reserves  established  by
         Lender in such  amounts,  and with  respect  to such  matters,  events,
         conditions or contingencies as to which Lender,  in its credit judgment
         based   upon  its   usual   and   customary   credit   and   collateral
         considerations,  determines reserves should be established from time to
         time,  including,  without  limitation,  with  respect to (1)  improper
         billings,  other billing and settlement errors which occur from time to
         time under the ACH  Procedures  Manual,  and (2) other sums  chargeable
         against  Borrower's Loan Account as Revolver Loans under any section of
         the Agreement.

                  Average  Monthly Loan Balance - the amount  obtained by adding
         the  aggregate  unpaid  balance  of all  Loans  and  Letter  of  Credit
         Obligations  outstanding  at the end of each day  during  the  month in
         question and by dividing that sum by the number of days in such month.

                  Bank - Fleet National Bank, and its successors and assigns.

                  Borrowing Base - as at any date of determination  thereof,  an
         amount equal to the lesser of:

                           (i)      the amount of the Revolver  Loan  Facility less the amount of
                  the Letter of Credit Obligations outstanding at such date; or

                           (ii)     the sum of:



<PAGE>



                     (a) the Accounts Borrowing Base at such
                                      date;

                                      MINUS

                                    (b)     the  Availability  Reserve  at  such
                                    date.

                  Consolidated Debt Service Coverage Ratio - with respect to any
         Person for any period of  determination,  the ratio of (i) Consolidated
         Cash Flow for such period to (ii)  payments of  Indebtedness  for Money
         Borrowed  required  to be paid  by  such  Person  during  such  period;
         provided,  however,  payments made on the $11,000,000  Indebtedness for
         Money  Borrowed owed to Bombardier Air for the funding of a deposit for
         the  acquisition of CRJ regional jet aircraft,  to the extent made from
         the proceeds of the Subordinated  Debt Offering,  shall not be deemed a
         payment by the Loan  Parties of  Indebtedness  for Money  Borrowed  and
         shall be excluded from the foregoing calculation.

                  Security   Documents  -  the  Deed  of  Trust,  each  Guaranty
         Agreement,  and all other instruments and agreements now or at any time
         hereafter securing the whole or any part of the Obligations."

         (ii)     The following definitions are added in the appropriate alphabetical sequence:

                  Accounts  Borrowing  Base  -  at  any  date  of  determination
         thereof,  an amount equal to sixty-five percent (65%) of the net amount
         of Eligible  Accounts  outstanding  at such date.  For the  purposes of
         calculating  the Accounts  Borrowing  Base,  the net amount of Eligible
         Accounts at any time shall be the face amount of such Eligible Accounts
         less any and all returns,  rebates,  discounts  (which may, at Lender's
         option,  be  calculated  on  shortest  terms),  sales  taxes,  credits,
         allowances  or excise  taxes of any nature at any time  issued,  owing,
         claimed  by  Account  Debtors,  granted,   outstanding  or  payable  in
         connection with such Accounts at such time  (including  current amounts
         owing by Borrower to United under the United Express Agreements).


                           Available  Amount - as such  term is  defined  in the
Reimbursement Agreement.

                           Average  Monthly  Revolver  Loan Balance - the amount
         obtained by adding the  aggregate  unpaid  balance of all Loans and all
         Letter  of  Credit   Obligations   except  for  the  Letter  of  Credit
         Obligations  arising under the Bond Letter of Credit Guaranty,  in each
         case which are  outstanding  at the end of each day during the month in
         question and by dividing that sum by the number of days in such month.


<PAGE>




                           Bond   Documents  -   collectively,   the  Bond  Loan
         Agreement,  the Bonds, the Indenture,  the Reimbursement Agreement, and
         all  guaranties,   agreements,  opinions,  certificates  or  assurances
         executed in connection therewith.

                           Bond  Letter of Credit - as defined  in the  Recitals
         contained in the First Amendment to the Agreement.

                           Bond  Letter of Credit  Guaranty  - the  guaranty  by
         Lender of the  reimbursement and other obligations owing by Borrower to
         Bank in  respect  of the Bond  Letter  of  Credit  as set  forth in the
         Reimbursement Agreement.

                           Bond  Letter  of  Credit  Closing  Date - the date on
         which all of the  conditions  set forth in Section 9.4 of the Agreement
         are satisfied  and Lender issues the Bond Letter of Credit  Guaranty in
         favor of Bank.

                           Bond Loan  Agreement  - as  defined  in the  Recitals
         contained in the First Amendment to the Agreement.

                           Bonds - as defined in the  Recitals  contained in the
         First Amendment to the Agreement.

                           Cash  Collateral  - cash  deposited  with  Lender  in
         accordance  with the  Agreement  as  security  for the Letter of Credit
         Obligations to the extent provided in the Agreement.

                           Cash Collateral Account - an interest-bearing account
         established by Lender on its books and to which Lender shall credit all
         Cash Collateral deposited with Lender in accordance with the Agreement.

                           Deed of Trust - the  Credit  Line  Leasehold  Deed of
         Trust and Security  Agreement executed by Borrower on or about the Bond
         Letter of Credit  Closing Date in favor of the trustees  named  therein
         for the benefit of Lender, as it may be amended, modified, supplemented
         or  restated  from time to time,  by which  Borrower  has  granted  and
         conveyed to the trustees for the benefit of Lender, as security for the
         Obligations,  Liens  upon  Borrower's  leasehold  estate in the  Realty
         leased by Borrower from the Authority pursuant to the Lease.

                           Fixed Bond Letter of Credit Guaranty Reserve - for so
         long as the Bond  Letter  of  Credit  and the  Bond  Letter  of  Credit
         Guaranty is outstanding,  a reserve established by Lender in the amount
         of $4,479,932,  or such lesser amount as Lender, in the exercise of its
         sole and unfettered discretion, may establish from time to time.



<PAGE>






                           Improvements  -  the  construction  of a  maintenance
         facility and associated access roadway, vehicle parking and maneuvering
         areas and aircraft paving aprons on the Realty.

                           Increasing Bond Letter of Credit  Guaranty  Reserve -
         for so long as the Bond  Letter of Credit and the Bond Letter of Credit
         Guaranty is outstanding, a reserve established by Lender which shall on
         the Bond  Letter of  Credit  Closing  Date be equal to zero,  but shall
         thereafter  increase on the first day of each month,  commencing on the
         first  day of the month  following  the Bond  Letter of Credit  Closing
         Date, by an amount equal to $53,750,  and shall thereafter  decrease by
         the amount of any Voluntary  Redemptions of the Bonds,  but in no event
         shall  the  amount of the  Increasing  Bond  Letter of Credit  Guaranty
         Reserve  be less than zero nor,  when  added to the amount of the Fixed
         Bond Letter of Credit Guaranty Reserve, exceed the Available Amount.

                           Indenture - as defined in the  Recitals  contained in
         the First Amendment to the Agreement.

                           Issuer - as defined in the Recitals  contained in the
         First Amendment to the Agreement.

                           Lease - as defined in the  Recitals  contained in the
         First Amendment to the Agreement.

                           Letter of Credit - the Bond  Letter of Credit and any
         other  letter of credit  issued by any of Lender's  Affiliates  for the
         account of Borrower.

                           Letter of Credit Guaranty - the Bond Letter of Credit
         Guaranty  and any other  guaranty  issued by Lender for the  account of
         Borrower by which Lender shall guarantee the payment by Borrower of its
         reimbursement obligations under a Letter of Credit.

                           Letter of Credit  Obligations  - that  portion of the
         Obligations  constituting Borrower's obligation to reimburse Lender for
         all amounts  paid by Lender under or with respect to a Letter of Credit
         Guaranty.



<PAGE>


                           Net  Accounts  Availability  - at  any  date  of  the
         determination thereof, the sum of (i) the Accounts Borrowing Base, less
         (ii) the  aggregate  amount  of the  Loans  and the  Letter  of  Credit
         Obligations  outstanding  at such date except for those with respect to
         the Bond Letter of Credit and the Bond Letter of Credit Guaranty.

                           Realty - the tract or parcels of real property leased
         by Borrower from the Authority pursuant to the Lease, together with the
         Improvements and the fixtures attached thereto.

                           Reimbursement  Agreement - as defined in the Recitals
         contained in the First Amendment to the Agreement.

                           Remarketing  Agent - shall have the meaning  ascribed
         to such term in the Indenture.

                           Subordinated   Debt   Offering   -  the   $50,000,000
         aggregate principal amount  ($57,500,000  aggregate principal amount if
         the initial  purchasers'  over-allotment  option is  exercised)  of the
         Parent's   Convertible   Subordinated  Notes,  payable  in  semi-annual
         interest  payments and with a final  maturity date of July 1, 2004, and
         subordinated  in right of payment to  certain  of the  Parent's  senior
         indebtedness  as more  particularly  described in the  indenture  under
         which the  notes are  issued,  which are  expected  to be issued by the
         Parent by August 31, 1997.

                           Voluntary  Redemptions - optional  redemptions of the
         Bonds  made by  Borrower  pursuant  to  Sections  3.1(g) and (h) of the
         Indenture."

                                   ARTICLE II

                         REPRESENTATIONS AND WARRANTIES

         The Loan  Parties  each hereby  represents  and  warrants to the Lender
that:

         2.1 Compliance with the Loan Agreement and Other Loan Documents.  As of
the execution of this Amendment,  each of the Loan Parties is in compliance with
all of the terms and provisions set forth in the Loan Agreement and in the other
Loan  Documents to be observed or performed by each of the Loan Parties,  except
where the  failure of the Loan  Parties to comply has been  waived in writing by
the Lender.



<PAGE>


         2.2.  Representations  in Loan Agreement and other Loan Documents.  The
representations  and  warranties  of the  Loan  Parties  set  forth  in the Loan
Agreement  and the other Loan  Documents  are true and  correct in all  material
respects  except  for  changes  in the  nature  of a Loan  Party's  business  or
operations that would render the information in any exhibit attached to the Loan
Agreement either inaccurate, incomplete or misleading, so long as the Lender has
consented to such changes or such changes are not  expressly  prohibited  by the
Loan Agreement.

         2.3.     No Event of Default.  No Default or Event of Default exists.

                                   ARTICLE III

                           MODIFICATION OF LOAN DOCUMENTS; ACKNOWLEDGMENT OF OBLIGATIONS

         3.1  Modification  of Loan Document The Loan  Agreement and each of the
other Loan  Documents  are  amended to provide  that any  reference  to the Loan
Agreement in the Loan  Agreement or any of the other Loan  Documents  shall mean
the Loan Agreement as amended by this Amendment,  and as it is further  amended,
restated,  supplemented  or modified from time to time.  The  provisions of that
certain letter from the Lender to the Borrower,  dated June 13, 1997, are deemed
superseded  and  replaced  by this  Amendment  and are of no  further  force and
effect.

         3.2. Acknowledgments by the Loan Parties. To induce the Lender to enter
into this  Amendment,  each Loan Party  acknowledges  and agrees with the Lender
that as of June 1, 1997, the aggregate  principal balance owing on the Revolving
Loans  outstanding  under  the Loan  Agreement  was in the sum of zero,  and the
aggregate  amount  of  Letters  of  Credit  and  Letter  of  Credit   Guaranties
outstanding was in the sum of $531,000 and that all such Obligations outstanding
are owed to the Lender without any offset, deduction, defense or counterclaim of
any nature in favor of either Loan Party.

                                   ARTICLE IV

                                     GENERAL

         4.1.  Full Force and Effect.  As  expressly  amended  hereby,  the Loan
Agreement  shall  continue  in full  force  and  effect in  accordance  with the
provisions  thereof.  As used in the Loan  Agreement,  "hereinafter",  "hereto",
"hereof"  or words of  similar  import,  shall,  unless  the  context  otherwise
requires, mean the Loan Agreement as amended by this Amendment.



<PAGE>


         4.2 Applicable  Law. This Amendment  shall be governed by and construed
in  accordance  with the internal  laws and  judicial  decisions of the State of
North Carolina.

         4.3  Counterparts.  This  Amendment  may be  executed  in  one or  more
counterparts,  each of which shall constitute an original, but all of which when
taken together shall constitute but one and the same instrument.

         4.4  Expenses.   The  Borrower  shall  reimburse  the  Lender  for  all
reasonable  fees and  expenses  (legal or  otherwise)  incurred by the Lender in
connection  with the  preparation,  negotiation,  execution and delivery of this
Amendment  and  all  other  agreements  and  documents  referred  to  herein  or
contemplated hereby.

         4.5.     Headings.  The headings in this  Amendment  are for the purpose of  reference  only and shall not
affect the construction of this Amendment.

         4.6 Waiver of Jury Trial. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW,  THE LOAN  PARTIES AND THE LENDER EACH WAIVES THE RIGHT TO TRIAL BY JURY IN
ANY ACTION,  SUIT,  PROCEEDING  OR  COUNTERCLAIM  OF ANY KIND  ARISING OUT OF OR
RELATED TO THIS AMENDMENT, THE LOAN AGREEMENT OR THE OTHER LOAN DOCUMENTS OR THE
TRANSACTIONS RELATED HERETO OR THERETO.

         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed and delivered on the date first above written.

                                    Borrower:

                                                     ATLANTIC COAST AIRLINES


                                                     By:________________________________________
                                                          Title:__________________________________
ATTEST:

- ----------------------------
_________ - Secretary

[CORPORATE SEAL]


<PAGE>


                                     Parent:

                                                     ATLANTIC COAST AIRLINES, INC.


                                                     By:________________________________________
                                                          Title:__________________________________
ATTEST:

- ----------------------------
_________ - Secretary

[CORPORATE SEAL]
                                                     Accepted in Charlotte, North Carolina

                                     Lender:

                                                     FLEET CAPITAL CORPORATION


                                                     By:_______________________________________
                                                          Title:___________________________________



</TABLE>

<TABLE>
<S>     <C>    <C>    <C>    <C>    <C>    <C>


EXHIBIT 10.23(b)
                                             SECOND AMENDMENT
                                                    TO
                                       LOAN AND SECURITY AGREEMENT

         THIS SECOND  AMENDMENT  TO LOAN AND SECURITY  AGREEMENT  ("Amendment"),
dated as of the 31st day of December, 1997, made by and between

         FLEET CAPITAL  CORPORATION,  a Rhode Island  corporation  (successor by
merger with Fleet  Capital  Corporation,  a Connecticut  corporation,  which was
formerly known as Shawmut Capital Corporation) (the "Lender"),

         ATLANTIC COAST AIRLINES, a California corporation (the "Borrower"), and

         ATLANTIC COAST AIRLINES,  INC., a Delaware  corporation  (the "Parent";
the Borrower and the Parent being collectively called the "Loan Parties");

         to the  Loan  and  Security  Agreement,  dated  October  12,  1995,  as
previously  amended by First  Amendment  thereto,  dated June 1, 1997 (the "Loan
Agreement"). All capitalized terms used herein without definition shall have the
meanings ascribed to such terms in the Loan Agreement.

                                    RECITALS
         RECITALS RECITALS RECITALS
         A.  Pursuant to the Loan  Agreement,  and upon the terms and subject to
the conditions  contained therein, the Lender has made available to the Borrower
a $20,000,000 revolving line of credit evidenced by the Loan Agreement.

         B. The Loan Parties have  requested  that the Loan Agreement be further
amended to (a) increase the aggregate amount of the Letter of Credit Obligations
which may be  outstanding  at any time from the sum of $10,500,000 to the sum of
$13,500,000,  and (b)  reduce  the  amount  of the Fixed  Bond  Letter of Credit
Guaranty Reserve,  and the Lender has agreed to such requests,  provided,  among
other things,  the Loan  Agreement  and the other Loan  Documents are amended as
herein provided.

         C. To  accomplish  the  foregoing  purposes,  the  parties  hereto  are
mutually desirous of further amending the Loan Agreement as set forth herein.

                                    STATEMENT OF AGREEMENT

         NOW,  THEREFORE,  in  consideration  of the premises and other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
expressly acknowledged, the Loan Parties and the Lender hereby agree as follows:


<PAGE>



                                                    36



                                    ARTICLE I

                          AMENDMENTS TO LOAN AGREEMENT

         The Loan Agreement is hereby amended as follows:

         1.1  Letters of Credit;  Letter of Credit  Guaranties.  Section  1.4.1,
Issuance of Letters of Credit and Letter of Credit Guaranties, is amended in its
entirety to read as follows:

                  "1.4.1.  Issuance  of  Letters  of Credit and Letter of Credit
         Guaranties.  Lender  agrees,  for so long as no  Default  or  Event  of
         Default  exists and subject to the  provisions  of Section 9 below,  to
         issue its, or cause to be issued its Affiliate's, Letters of Credit and
         Letter of Credit Guaranties,  provided that the aggregate amount of the
         Letter of Credit  Obligations  outstanding at any time shall not exceed
         $13,500,000 and, without the prior written consent of Lender, no Letter
         of Credit or Letter of Credit Guaranty may have an expiration date that
         is  after  the  last day of the  Original  Term or the then  applicable
         Renewal Term."

         1.2 Letter of Credit and Letter of Credit Guaranty Fees. Section 2.2.3,
Letter of Credit and Letter of Credit  Guaranty Fees, is amended in its entirety
to read as follows:

                  "2.2.3.  Letter of Credit and Letter of Credit  Guaranty  Fees.  Borrower shall
         pay the  following  fees for all  Letters  of Credit  and  Letter  of Credit  Guaranties
         issued by Lender and its Affiliates pursuant to Section 1.4.1 hereof:

                           (i) Upon  issuance  of the Bond  Letter of Credit and
                  the  Bond  Letter  of  Credit  Guaranty,  fees  to Bank in the
                  amounts  and on the dates as set forth in Section  2.03 of the
                  Reimbursement Agreement;

                           (ii) Upon issuance of each other Letter of Credit and
                  Letter of Credit Guaranty:



<PAGE>


                                    (a)  an  issuance  fee  to  Lender  for  the
                           account of both Lender and its Affiliate  that issues
                           such other  Letter of Credit equal to (1) in the case
                           of  those  three  (3)  Letters  of  Credit,   numbers
                           9721204,  9721205  and  9721206,  issued  by  Bank on
                           December  31,  1997 in favor of  NationsBanc  Leasing
                           Corporation as  beneficiary  in the original  undrawn
                           amounts   of   $750,000,   $750,000   and   $875,000,
                           respectively,  and the  Letter of  Credit  Guaranties
                           issued  by  Lender  with  respect  thereto,  one  and
                           one-quarter  percent (1.25%) per annum of the undrawn
                           amount of each such Letter of Credit,  and (2) in the
                           case of each  other  Letter of Credit  and  Letter of
                           Credit  Guaranty,  the greater of (a) $500 or (b) one
                           and one-half  percent (1.5%) per annum of the undrawn
                           amount of such other  Letter of Credit,  in each case
                           payable in advance  upon the  issuance  of each other
                           Letter of Credit and Letter of Credit Guaranty and on
                           each extension of the stated termination date thereof
                           for so long as such other Letter of Credit and Letter
                           of Credit Guaranty is outstanding; and

                                    (b) the  reasonable  and  customary  charges
                           from time to time of the issuer of such other  Letter
                           of Credit with respect to the issuance, notification,
                           amendment, transfer, administration, cancellation and
                           conversion of, and drawings under,  such other Letter
                           of  Credit,  all of which  shall be payable to Lender
                           for the account of such issuer.

                  All issuance fees in connection with each Letter of Credit and
         Letter of Credit  Guaranty  as set forth in Sections  2.2.3  (i)(a) and
         (ii)(a)  hereof  shall be deemed  fully earned upon the issuance of the
         Letter of Credit and Letter of Credit Guaranty and shall not be subject
         to rebate or proration  upon the  termination of this Agreement for any
         reason."

         1.3      Fixed Bond Letter of Credit Guaranty Reserve.        The   definition   of  "Fixed  Bond
Letter of Credit Guaranty  Reserve" set forth in Appendix A, General  Definitions,  to the Loan Agreement,
is amended in its entirety to read as follows:

                  "Fixed Bond Letter of Credit Guaranty Reserve - for so long as
         the Bond  Letter of Credit and the Bond  Letter of Credit  Guaranty  is
         outstanding,   a  reserve  established  by  Lender  in  the  amount  of
         $1,980,000."

                                                ARTICLE II

                                      REPRESENTATIONS AND WARRANTIES

         The Loan  Parties  each hereby  represents  and  warrants to the Lender
that:



<PAGE>


         2.1 Compliance with the Loan Agreement and Other Loan Documents.  As of
the execution of this Amendment,  each of the Loan Parties is in compliance with
all of the terms and provisions set forth in the Loan Agreement and in the other
Loan  Documents to be observed or performed by each of the Loan Parties,  except
where the  failure of the Loan  Parties to comply has been  waived in writing by
the Lender.

         2.2.  Representations  in Loan Agreement and other Loan Documents.  The
representations  and  warranties  of the  Loan  Parties  set  forth  in the Loan
Agreement  and the other Loan  Documents  are true and  correct in all  material
respects  except  for  changes  in the  nature  of a Loan  Party's  business  or
operations that would render the information in any exhibit attached to the Loan
Agreement either inaccurate, incomplete or misleading, so long as the Lender has
consented to such changes or such changes are not  expressly  prohibited  by the
Loan Agreement.

         2.3.     No Event of Default.  No Default or Event of Default exists.

                                               ARTICLE III

                      MODIFICATION OF LOAN DOCUMENTS; ACKNOWLEDGMENT OF OBLIGATIONS

         3.1  Modification  of Loan Document The Loan  Agreement and each of the
other Loan  Documents  are  amended to provide  that any  reference  to the Loan
Agreement in the Loan  Agreement or any of the other Loan  Documents  shall mean
the Loan Agreement as amended by this Amendment,  and as it is further  amended,
restated, supplemented or modified from time to time.

         3.2. Acknowledgments by the Loan Parties. To induce the Lender to enter
into this  Amendment,  each Loan Party  acknowledges  and agrees with the Lender
that as of the opening of business on December 31, 1997, the aggregate principal
balance owing on the Revolving Loans outstanding under the Loan Agreement was in
the sum of zero,  and the  aggregate  amount of  Letters of Credit and Letter of
Credit Guaranties outstanding was in the sum of $12,485,932.00 and that all such
Obligations  outstanding  are owed to the Lender without any offset,  deduction,
defense or counterclaim of any nature in favor of either Loan Party.

                                                ARTICLE IV

                                                 GENERAL

         4.1.  Full Force and Effect.  As  expressly  amended  hereby,  the Loan
Agreement  shall  continue  in full  force  and  effect in  accordance  with the
provisions  thereof.  As used in the Loan  Agreement,  "hereinafter",  "hereto",
"hereof"  or words of  similar  import,  shall,  unless  the  context  otherwise
requires, mean the Loan Agreement as amended by this Amendment.

         4.2 Applicable  Law. This Amendment  shall be governed by and construed
in  accordance  with the internal  laws and  judicial  decisions of the State of
North Carolina.


<PAGE>


                  Consolidated Adjusted Net
                  Earnings From Operations                                         Per Annum Fee


         4.3  Counterparts.  This  Amendment  may be  executed  in  one or  more
counterparts,  each of which shall constitute an original, but all of which when
taken together shall constitute but one and the same instrument.

         4.4  Expenses.   The  Borrower  shall  reimburse  the  Lender  for  all
reasonable  fees and  expenses  (legal or  otherwise)  incurred by the Lender in
connection  with the  preparation,  negotiation,  execution and delivery of this
Amendment  and  all  other  agreements  and  documents  referred  to  herein  or
contemplated hereby.

         4.5.     Headings.  The  headings in this  Amendment  are for the purpose of  reference  only and
shall not affect the construction of this Amendment.

         4.6 Waiver of Jury Trial. TO THE FULLEST EXTENT PERMITTED BY APPLICABLE
LAW,  THE LOAN  PARTIES AND THE LENDER EACH WAIVES THE RIGHT TO TRIAL BY JURY IN
ANY ACTION,  SUIT,  PROCEEDING  OR  COUNTERCLAIM  OF ANY KIND  ARISING OUT OF OR
RELATED TO THIS AMENDMENT, THE LOAN AGREEMENT OR THE OTHER LOAN DOCUMENTS OR THE
TRANSACTIONS RELATED HERETO OR THERETO.


<PAGE>


         IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be
executed and delivered on the date first above written.

                                    Borrower:

                                                     ATLANTIC COAST AIRLINES


                                                     By:________________________________________
                                                          Title:__________________________________
ATTEST:

- ----------------------------
_________ - Secretary

[CORPORATE SEAL]
                                     Parent:

                                                     ATLANTIC COAST AIRLINES, INC.


                                                     By:________________________________________
                                                          Title:__________________________________
ATTEST:

- ----------------------------
_________ - Secretary

[CORPORATE SEAL]
                                                     Accepted in Charlotte, North Carolina

                                     Lender:

                                                     FLEET CAPITAL CORPORATION


                                                     By:_______________________________________
                                                          Title:___________________________________



<PAGE>
</TABLE>

<TABLE>
<S>     <C>
EXHIBIT 10.32(a)
                                         Atlantic Coast Airlines
                                          Summary of Bonus Plans
                                             Amended 3/23/98

"Share the Success": Hourly

      applies to hourly workers actively employed by ACA for two full calendar quarters meeting a
     hours-worked requirement
      payable quarterly
      payouts require that company reach minimum quarterly financial targets for
      quarter if profit margin  target  achieved,  each  employee  automatically
      receives  $150  employee  receives  $50 for each  month  that ACA meets or
      exceeds each of certain operational goals
     (flight completion, on-time departures, mishandled baggage)
      $25 if certain lesser threshold is achieved

"Share the Success": Salaried

      applies to exempt employees
      payable annually
      payouts up to 30% of salary depending on management level
      payouts depend on two factors: operating profit margin and operational performance (completion
     factor, on-time departures, mishandled baggage)
      for each factor, payouts depend on whether company attains the "threshold achievement" or  the
     higher "target achievement"
      payout highest if, in addition certain operating profit achieved
      potential maximum payout represents varying percentage of salary depending on management level



<PAGE>


                                                        58







SS_NYL4/246328
</TABLE>

<TABLE>
<S>     <C>
EXHIBIT 10.50(a)


                         ATLANTIC COAST AIRLINES, ISSUER
                    ATLANTIC COAST AIRLINES, INC., GUARANTOR

                               PURCHASE AGREEMENT

                                                                                September 19, 1997

Morgan Stanley & Co.
Incorporated
1585 Broadway
New York, New York  10036-8293

Dear Sirs:

                  Atlantic  Coast  Airlines,   a  California   corporation  (the
"Company"),  in  connection  with the  financing  of (i) the debt portion of ten
leveraged aircraft leases and (ii) the purchase of four aircraft,  proposes that
First National Bank of Maryland,  as trustee (the "Trustee"),  issue and sell to
you (the "Placement Agent") its Pass Through Certificates,  Series 1997-1 in the
aggregate  principal amounts and with the interest rates and final  distribution
dates set  forth on  Schedule  I hereto  (the  "Certificates")  on the terms and
conditions stated herein. The aggregate  principal amount of Certificates due on
each such final distribution date is referred to as a "Pass Through  Certificate
Designation".

                  The Certificates will be issued pursuant to four separate pass
through trust agreements each to be dated as of September 25, 1997 (collectively
the "Pass Through Trust  Agreements")  among  Atlantic Coast  Airlines,  Inc., a
Delaware  corporation (the "Guarantor"),  the Company and the Trustee.  The Pass
Through  Trust  Agreements  are related to the  creation and  administration  of
Atlantic  Coast Air Pass  Through  Trust  Series  1997-1A (the "Class A Trust"),
Atlantic Coast Airlines Pass Through Trust Series 1997-1B (the "Class B Trust"),
Atlantic  Coast Airlines Pass Through Trust Series 1997-1C (the "Class C Trust")
and Atlantic  Coast  Airlines  Pass Through  Trust Series  1997-1D (the "Class D
Trust",  and together with the Class A Trust,  the Class B Trust and the Class C
Trust, the "Trusts"). Certain amounts of interest payable on the Certificates to
be issued by the Class A Trust,  the Class B Trust and the Class C Trust will be
entitled to the benefits of a separate  liquidity  facility for each such Trust.
ING Bank  N.V.  (the  "Liquidity  Provider")  will  enter  into  three  separate
revolving  credit  agreements  (each, a "Liquidity  Facility") to be dated as of
September 25, 1997 for the benefit of the holders of the Certificates  issued by
the Class A Trust,  the Class B Trust and the Class C Trust,  respectively.  The
Liquidity  Provider and the holders of the Certificates  will be entitled to the
benefits of an Intercreditor Agreement to be dated as of September 25, 1997 (the
"Intercreditor Agreement") among the Trusts, First National Bank of Maryland, as
Subordination Agent (the "Subordination Agent"), and the Liquidity Provider.

                  The  Certificates  will be offered  without  being  registered
under the Securities Act of 1933, as amended (the "Securities Act"), in reliance
on exemptions therefrom.

                  In connection with the sale of the Certificates, the Guarantor
and  the  Company  have  prepared  a  preliminary   offering   memorandum   (the
"Preliminary  Memorandum")  and will prepare a final  offering  memorandum  (the
"Final  Memorandum" and, with the Preliminary  Memorandum,  each a "Memorandum")
setting forth or including a description of the terms of the  Certificates,  the
terms of the offering and a description of the Company and its business.

                  Capitalized  terms not  otherwise  defined  in this  Agreement
shall have the meanings  specified therefor in the Pass Through Trust Agreements
or in the Indentures referred to in the Pass Through Trust Agreements;  provided
that as used in this Agreement,  the term "Operative  Agreements"  shall include
the Pass Through Trust Agreements.

                  1.       Representations  and  Warranties.  The Guarantor and the Company  represent and
warrant to, and agree with, you that as of the date hereof:

                  (a) The Preliminary  Memorandum does not contain and the Final
Memorandum,  in the form used by the Placement Agent to confirm sales and on the
Closing Date,  will not contain any untrue  statement of a material fact or omit
to state a material fact necessary to make the statements  therein, in the light
of the circumstances under which they were made, not misleading, except that the
representations  and  warranties  set forth in this Section 1(a) do not apply to
statements or omissions in either Memorandum based upon information  relating to
the Placement  Agent furnished to the Guarantor or the Company in writing by the
Placement Agent through you expressly for use therein.

                  (b)  Each of the  Guarantor  and the  Company  has  been  duly
incorporated,  is validly  existing as a corporation  in good standing under the
laws of the  jurisdiction  of its  incorporation,  has the  corporate  power and
authority  to own its  property and to conduct its business as described in each
Memorandum and to perform its obligations under this Agreement and the Operative
Agreements  to which it is, or is to be, a party;  each of the Guarantor and the
Company is duly  qualified to transact  business and is in good standing in each
jurisdiction in which the conduct of its business or its ownership or leasing of
property requires such  qualification,  except to the extent that the failure to
be so qualified or be in good standing would not have a material  adverse effect
on the Guarantor  and its  subsidiaries,  taken as a whole (a "Material  Adverse
Effect").

                  (c) This  Agreement  has been duly  authorized,  executed  and
delivered by the Guarantor and the Company.

                  (d) On or prior  to the  Closing  Date,  the  issuance  of the
Certificates   will  be  duly   authorized  by  the  Trustee.   When   executed,
authenticated,  issued and  delivered in the manner  provided for in the related
Pass  Through  Trust  Agreement  and  sold  and  paid  for as  provided  in this
Agreement, each of the Certificates will be valid and binding obligations of the
Trustee  entitled to the benefits of the related Pass Through  Trust  Agreement,
enforceable  against the Trustee in accordance with its terms, except as limited
by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and
other  similar laws  relating to or affecting  creditors'  rights  generally and
general equitable principles (whether considered in a proceeding in equity or at
law).

                  (e) On or prior  to the  Closing  Date,  the  issuance  of the
Equipment  Notes will be authorized by the related Owner Trustee or the Company,
as the case may be.  When duly  executed  and  delivered  by the  related  Owner
Trustee,  or the  Company,  as the case may be,  and duly  authenticated  by the
Indenture Trustee in accordance with the terms of the related Indenture, each of
the  Equipment  Notes will be duly issued under such related  Indenture and will
constitute  the valid and  binding  obligations  of such  Owner  Trustee  or the
Company,  as the case may be, and the  holders  thereof  will be entitled to the
benefits of such related Indenture, except as limited by bankruptcy, insolvency,
fraudulent  conveyance,  reorganization,   moratorium  and  other  similar  laws
relating to or  affecting  creditors'  rights  generally  and general  equitable
principles (whether considered in a proceeding in equity or at law).

                  (f) The Operative Agreements to which the Guarantor and/or the
Company  is,  or is to be,  a party,  have  each  been  duly  authorized  by the
Guarantor or the Company,  as the case may be, are or will be  substantially  in
the form heretofore supplied to you and, when duly executed and delivered by the
Guarantor  or  Company,  as the case may be, will  constitute  valid and binding
obligations  of the  Guarantor  or  Company,  as the case may be,  except (i) as
limited  by  bankruptcy,  insolvency,  fraudulent  conveyance,   reorganization,
moratorium  and other  similar laws relating to or affecting  creditors'  rights
generally and general equitable  principles  (whether considered in a proceeding
in equity or at law) and (ii) in the case of each Lease and each  Indenture,  as
the case may be, as limited  by  applicable  laws which may affect the  remedies
provided  in such  Lease or such  Indenture,  as the case  may be,  which  laws,
however,  do not make the  remedies  provided in such Lease  inadequate  for the
practical  realization  of the  rights and  benefits  provided  thereby.  On the
Delivery Date, the related  Leases and other  Operative  Agreements to which the
Guarantor  and/or the Company is, or is to be, a party will constitute the valid
and binding obligations of the Guarantor and/or the Company, as the case may be,
except  (i)  as  limited  by  bankruptcy,   insolvency,  fraudulent  conveyance,
reorganization,  moratorium  and other  similar  laws  relating to or  affecting
creditors' rights generally and general equitable principles (whether considered
in a proceeding in equity or at law) and (ii) in the case of each Lease and each
Indenture,  as limited by applicable laws which may affect the remedies provided
in such Lease or such Indenture, as the case may be, which laws, however, do not
make  the  remedies   provided  in  such  Lease  inadequate  for  the  practical
realization of the rights and benefits provided thereby.  The Certificates,  the
Equipment Notes, the Indentures,  and the Leases and other Operative  Agreements
to which the Guarantor  and/or the Company is, or is to be, a party will conform
in all material respects to the descriptions thereof in the Final Memorandum.

                  (g) The  execution  and delivery by the  Guarantor  and/or the
Company of this  Agreement and the  Operative  Agreements to which the Guarantor
and/or the Company is, or is to be, a party,  the  consummation by the Guarantor
and the Company of the  transactions  contemplated  in this  Agreement  and such
Operative  Agreements,  and compliance by the Guarantor and the Company with the
terms of this  Agreement and such Operative  Agreements  will not contravene (i)
the certificate of incorporation or by-laws of the Guarantor and/or the Company,
as the case may be, (ii) any  provision of  applicable  law or any  agreement or
other instrument  binding upon the Guarantor or any of its subsidiaries or (iii)
any judgment,  order or decree of any governmental  body, agency or court having
jurisdiction  over the  Guarantor or any  subsidiary  other than, in the case of
clauses (ii) and (iii) above, such contraventions that would not individually or
in the  aggregate  have a Material  Adverse  Effect,  and no consent,  approval,
authorization  or order of, or  qualification  with,  any  governmental  body or
agency  is  required  for  the  valid  authorization,  execution,  delivery  and
performance  by the  Guarantor  and/or  the  Company of this  Agreement  and the
Operative  Agreements to which the Guarantor and/or the Company is, or is to be,
a party, or the consummation by the Guarantor or the Company of the transactions
contemplated by this Agreement and such Operative Agreements, except such as may
be  required  by the  securities  or Blue  Sky  laws of the  various  states  in
connection with the offer and sale of the  Certificates  and the Equipment Notes
and except for filings or recordings  with the Federal  Aviation  Administration
(the  "FAA")  and under  the  Uniform  Commercial  Code as in effect in Utah and
Virginia,  which filings or recordings  shall have been made, or duly  presented
for filing,  on or prior to the date of issuance of the Equipment  Notes for any
Aircraft or the Delivery Date therefor, as may be applicable.

                  (h) There has not occurred any material adverse change, or any
development  involving a prospective  material adverse change, in the condition,
financial  or  otherwise,  or in the  earnings,  business or  operations  of the
Guarantor  and its  subsidiaries,  taken as a whole,  from that set forth in the
Preliminary Memorandum.

                  (i) There are no legal or governmental  proceedings pending or
threatened  to which the Guarantor or any of its  subsidiaries  is a party or to
which any of the  properties  of the  Guarantor  or any of its  subsidiaries  is
subject other than proceedings  accurately described in all material respects in
each Memorandum and proceedings  that would not have a Material  Adverse effect,
or on the power or  ability of the  Guarantor  or the  Company  to  perform  its
obligations under this Agreement or any of the Operative Agreement,  to which it
is, or is to be, a party, or to consummate the transactions  contemplated by the
Final Memorandum.

                  (j) Except as described in the Final  Memorandum,  neither the
Guarantor nor the Company is in default in the  performance or observance of any
obligation,   agreement,  covenant  or  condition  contained  in  any  contract,
indenture,   mortgage,  loan  agreement,  note,  lease  or  other  agreement  or
instrument to which it is a party or by which it may be bound or to which any of
its  properties  may be subject,  except for such defaults that would not have a
Material Adverse Effect.

                  (k) Except as disclosed in the Final Memorandum, the Guarantor
and its  subsidiaries  have good and marketable title to all real properties and
all other  properties  and assets  owned by them,  in each case free from liens,
encumbrances  and defects  except where the failure to have such title would not
have a Material Adverse Effect; and except as disclosed in the Final Memorandum,
the Guarantor  and its  subsidiaries  hold any leased real or personal  property
under valid and enforceable leases with no exceptions that would have a Material
Adverse Effect.

                  (l)  Except as  disclosed  in the Final  Memorandum,  no labor
dispute with the employees of the Guarantor or any of its subsidiaries exists or
to the  knowledge of the Guarantor or any of its  subsidiaries  is imminent that
might have a Material Adverse Effect.

                  (m) Neither the  Guarantor,  the Company nor any affiliate (as
defined in Rule 501(b) of Regulation D under the Securities Act, an "Affiliate")
of the  Guarantor or the Company has directly,  or through any agent,  (i) sold,
offered for sale, solicited offers to buy or otherwise negotiated in respect of,
any security (as defined in the  Securities  Act) which is or will be integrated
with  the  sale  of  the  Certificates  in  a  manner  that  would  require  the
registration under the Securities Act of the Certificates or (ii) engaged in any
form of general  solicitation  or general  advertising  in  connection  with the
offering of the  Certificates (as those terms are used in Regulation D under the
Securities Act) or in any manner  involving a public offering within the meaning
of Section 4(2) of the Securities Act.

                  (n) None of the Guarantor,  the Company, its Affiliates or any
person  acting on its or their  behalf  (other  than the  Placement  Agent)  has
engaged in any directed selling efforts (as that term is defined in Regulation S
under the Securities Act ("Regulation  S")) with respect to the Certificates and
the  Guarantor,  the Company and its  Affiliates and any person acting on its or
their behalf  (other than the  Placement  Agent) have complied with the offering
restrictions requirement of Regulation S.

                  (o)      The Guarantor is subject to Section 13 or 15(d) of the Securities  Exchange Act
of 1934, as amended (the "Exchange Act").

                  (p) The Certificates  satisfy the eligibility  requirements of
Rule 144A(d)(3) under the Securities Act.

                  (q) It is not necessary in connection with the offer, sale and
delivery of the  Certificates to the Placement Agent in the manner  contemplated
by this  Agreement to register the  Certificates  under the Securities Act or to
qualify any of the Indentures or Pass Through Trust  Agreements  under the Trust
Indenture Act of 1939, as amended (the "Trust Indenture Act").

                  (r) None of the  Guarantor,  the Company nor any of the Trusts
is an "investment company",  within the meaning of the Investment Company Act of
1940, as amended (the "Investment  Company Act"); and none of the Trusts,  after
giving effect to the offering and sale of the  Certificates  and the application
of the  proceeds  thereof  as  described  in the  Final  Memorandum,  will be an
"investment company" as defined in the Investment Company Act.

                  (s) The  accountants  that  examined  and  issued an  auditors
report with respect to the  consolidated  financial  statements of the Guarantor
and  its  consolidated   subsidiaries  included  in  the  Final  Memorandum  are
independent  public accountants within the meaning of the Securities Act and the
regulations thereunder.

                  (t) The  consolidated  financial  statements  included  in the
Final  Memorandum  present  fairly the  consolidated  financial  position of the
Guarantor and its  consolidated  subsidiaries  as of the dates indicated and the
consolidated  results of  operations  and cash  flows or  changes  in  financial
position of the  Guarantor  and its  consolidated  subsidiaries  for the periods
specified.  Such  financial  statements  have been prepared in  conformity  with
generally  accepted   accounting   principles  applied  on  a  consistent  basis
throughout the periods  involved.  The financial  statement  schedules,  if any,
included in the Final Memorandum  present fairly the information  required to be
stated therein.

                  (u) The Guarantor and its  subsidiaries  (i) are in compliance
in all material respects with any and all applicable foreign, federal, state and
local  laws and  regulations  relating  to the  protection  of human  health and
safety,  the environment or hazardous or toxic substances or wastes,  pollutants
or contaminants ("Environmental Laws"), (ii) have received all permits, licenses
or other  approvals  required  of them under  applicable  Environmental  Laws to
conduct their  respective  businesses and (iii) are in compliance with all terms
and  conditions  of any such  permit,  license or  approval,  except  where such
noncompliance  with  Environmental  Laws,  failure to receive required  permits,
licenses or other  approvals or failure to comply with the terms and  conditions
of such permits,  licenses or approvals  would not,  singly or in the aggregate,
have a Material Adverse Effect.

                  (v)  To  the  best  of  the   Guarantor's  and  the  Company's
knowledge,  after due inquiry, no disposal, release or discharge of hazardous or
toxic  substances or wastes,  pollutants or contaminants has occurred on, in, at
or about any of the facilities of the Guarantor or its subsidiaries;  no actions
or claims based on any  Environmental  Law,  which actions or claims  reasonably
would be likely, singly or in the aggregate,  to have a Material Adverse Effect,
are  pending or, to the best of the  Guarantor's  and the  Company's  knowledge,
threatened against the Guarantor or its subsidiaries.

                  (w) The Guarantor and its subsidiaries  have complied with all
provisions  of  Section  517.075,  Florida  Statutes  (Chapter  92-198,  Laws of
Florida).

                  (x) The  Company  is a  "citizen  of the  United  States"  (as
defined  in  Section  40102(a)(15)  of Title 49 of the United  States  Code,  as
amended)  and  is an  air  carrier  operating  under  a  certificate  of  public
convenience and necessity issued by the Secretary of Transportation  pursuant to
Section 41102 of Title 49, United States Code. There is in force with respect to
the Company an air carrier operating  certificate issued by the Federal Aviation
Administration  pursuant to 14 C.F.R. Part 119. All of the outstanding shares of
capital stock of the Company have been duly  authorized  and validly  issued and
are fully paid and non-assessable and are owned by the Guarantor, free and clear
of any pledge, lien, security interest,  charge, claim, equity or encumbrance of
any kind.

                  (y)  The  Guarantor  and  its  subsidiaries  possess  adequate
certificates,   authorities  and  permits  issued  by  appropriate  governmental
agencies or bodies necessary to conduct, in all material respects,  the business
now operated by them and have not received any notice of proceedings relating to
the revocation or modification of any such certificate, authority or permit that
reasonably would be likely to, individually or in the aggregate, have a Material
Adverse Effect.

                  (z) No  Appraiser  is an  affiliate  of the  Guarantor  or the
Company or, to the knowledge the Guarantor or of the Company,  has a substantial
interest,  direct or indirect, in the Guarantor or the Company. To the knowledge
of the  Guarantor or the Company,  none of the officers and  directors of any of
such  appraisers  are connected  with the Guarantor or the Company or any of its
affiliates as an officer,  employee,  promoter,  underwriter,  trustee, partner,
director or person performing similar functions.

                  The representations and warranties contained in this Agreement
shall be true and correct as of the date of this Agreement and as of the Closing
Date.

                  2.  Offering.  You have advised the  Guarantor and the Company
that the Placement Agent will make an offering of the Certificates  purchased by
the  Placement  Agent  hereunder  on the  terms  to be set  forth  in the  Final
Memorandum  as soon as  practicable  after this  Agreement is entered into as in
your judgment is advisable.

                  3. Purchase and Delivery. The Guarantor and the Company hereby
agree to cause the Trustee to sell to the  Placement  Agent,  and the  Placement
Agent,  upon the basis of the  representations  and warranties herein contained,
but subject to the conditions  hereinafter  stated,  agrees to purchase from the
Trustee the principal  amount of Certificates  of each Pass Through  Certificate
Designation  set forth in  Schedule I hereto at a purchase  price of 100% of the
principal amount thereof.

                  Payment for the Certificates shall be made against delivery of
the  Certificates  at a  closing  (the  "Closing")  to be held at the  office of
Shearman & Sterling,  599 Lexington  Avenue,  New York, New York, at 10:00 A.M.,
local time,  on September  25,  1997,  or at such other time on the same or such
other date, not later than September 30, 1997, as shall be designated in writing
by you. The time and date of such payment are herein  referred to as the Closing
Date.  Delivery  of the  Certificates  shall  be  made to  your  account  at The
Depository  Trust Company against payment by the Placement Agent of the purchase
price  thereof  to or upon  the  order  of the  Trustee  by wire  transfer.  The
Certificates shall be in definitive or global form and registered in the name of
Cede & Co. or in such other names, and in such  denominations as you may request
in writing at least one full  business  day in  advance of the  Closing  Date in
definitive or global form. The Company agrees to have the Certificates available
for  inspection,  checking and packaging by you in New York,  New York not later
than 1:00 P.M. on the business day prior to the Closing Date.

                  As  compensation to the Placement Agent for its commitment and
obligations hereunder in respect of the Certificates,  including its undertaking
to  distribute  the  Certificates,  each Owner Trustee will pay to the Placement
Agent an amount equal to that  percentage of the aggregate  principal  amount of
each Pass Through  Certificate  Designation (to the extent that such Designation
relates to  Equipment  Notes to be issued by such Owner  Trustee or the Company,
respectively)  purchased by it as set forth in Schedule I;  provided that if any
Owner  Trustee  fails to pay such  amounts  when due,  the Company will pay such
amounts.  Such payment shall be made by Federal funds check or other immediately
available funds.

                  4.  Conditions to Closing.  The  obligations  of the Placement
Agent under this Agreement to purchase the  Certificates  will be subject to the
following conditions:

                  (a)      Subsequent to the date of this Agreement and prior to the Closing Date,

                  (i) there shall not have occurred any  downgrading,  nor shall
         any notice have been given of any intended or potential  downgrading or
         of any  review  for a  possible  change  that  does  not  indicate  the
         direction of the  possible  change,  in the rating  accorded any of the
         Guarantor's or the Company's securities, including the Certificates, by
         any "nationally  recognized  statistical rating  organization," as such
         term is defined for  purposes of Rule  436(g)(2)  under the  Securities
         Act; and

                  (ii)  there  shall  not  have  occurred  any  change,  or  any
         development involving a prospective change, in the condition, financial
         or  otherwise,  or in the  earnings,  business  or  operations,  of the
         Guarantor and its  subsidiaries,  taken as a whole, from that set forth
         in the Preliminary  Memorandum that, in your judgment,  is material and
         adverse and that makes it, in your  judgment,  impracticable  to market
         the  Certificates  on the terms and in the manner  contemplated  in the
         Final Memorandum.

                  (b) You shall have received on the Closing Date a certificate,
dated the Closing Date and signed by an executive  officer of the  Guarantor and
the  Company,  to the effect set forth in clause  (a)(i) above and to the effect
that  the  representations  and  warranties  of the  Guarantor  and the  Company
contained in this Agreement are true and correct as of the Closing Date and that
the  Guarantor  and the Company have  complied  with all of the  agreements  and
satisfied all of the conditions on their part to be performed or satisfied on or
before the Closing Date.

                  The officer signing and delivering  such  certificate may rely
upon the best of his knowledge as to proceedings threatened.

                  (c) You shall have  received on the Closing  Date (i) opinions
of Gibson, Dunn & Crutcher and Troutman Sanders LLP, independent counsel for the
Guarantor and the Company,  each dated the Closing Date, to the effect set forth
in  Exhibit A and B,  respectively,  (ii)  opinion  of  General  Counsel  of the
Guarantor  and the Company,  dated the Closing  Date, to the effect set forth in
Exhibit C and (iii) an opinion  of Ober,  Kaler,  Grimes & Shriver,  independent
counsel  for the  Trustee,  dated the Closing  Date,  to the effect set forth in
Exhibit D.

                  (d) You shall have  received on the Closing Date an opinion of
Shearman & Sterling, counsel for the Placement Agent, dated the Closing Date, in
form and substance satisfactory to you.

                  (e) You shall have received on each of the date hereof and the
Closing Date a letter,  dated the date hereof or the Closing  Date,  as the case
may be, in form and substance  satisfactory to you, from the Guarantor's and the
Company's independent public accountants,  containing statements and information
of  the  type  ordinarily   included  in  accountants'   "comfort   letters"  to
underwriters  with respect to the  financial  statements  and certain  financial
information contained in or incorporated by reference into the Final Memorandum.

                  (f) The Guarantor and the Company shall have  furnished to you
and to counsel for the Placement  Agent,  in form and substance  satisfactory to
you,  such other  documents,  certificates  and  opinions  as such  counsel  may
reasonably request in order to pass upon the matters referred to in Section 3(d)
and  in  order  to  evidence  the  accuracy  and  completeness  of  any  of  the
representations,  warranties or statements,  the  performance of any covenant by
the Guarantor or the Company theretofore to be performed, or the compliance with
any of the conditions herein contained.

                  (g)  Each  of  the  Appraisers  shall  have  furnished  to the
Placement Agent a letter from such Appraiser, addressed to the Guarantor and the
Company and dated the Closing Date,  confirming  that such Appraiser and each of
its directors and officers (i) is not an affiliate of the Guarantor, the Company
or any of its affiliates, (ii) does not have any substantial interest, direct or
indirect,  in the  Guarantor,  the Company or any of its affiliates and (iii) is
not connected  with the  Guarantor,  the Company or any of its  affiliates as an
officer, employee, promoter,  underwriter,  trustee, partner, director or person
performing similar functions.

                  (h) On the Closing Date, the Certificates  shall be rated "A-"
in the case of the  Certificates of the Class A Trust,  "BBB" in the case of the
Certificates of the Class B Trust,  "BB-" in the case of the Certificates of the
Class C Trust and "BB-" in the case of the Certificates of the Class D Trust, by
Standard & Poor's Ratings  Service;  and "A3" in the case of the Certificates of
the Class A Trust,  "Baa3" in the case of the Certificates of the Class B Trust,
"Ba2" in the case of the  Certificates of the Class C Trust and "B1" in the case
of the Certificates of the Class D Trust by Moody's Investors Services, Inc.

                  5. Covenants of the Company.  In further  consideration of the
agreements of the Placement Agent contained in this Agreement, the Guarantor and
the Company covenant as follows:

                  (a) To  furnish  to you,  without  charge,  during  the period
         mentioned  in  paragraph  (c)  below,  as  many  copies  of  the  Final
         Memorandum,  any documents  incorporated  by reference  therein and any
         supplements and amendments thereto as you may reasonably request and to
         use its best efforts to deliver such copies to you by 12 noon (New York
         time) on the  second  business  day  following  the  execution  of this
         Agreement.

                  (b) Before amending or  supplementing  either  Memorandum,  to
         furnish to you a copy of each such proposed amendment or supplement and
         not to use any such  proposed  amendment  or  supplement  to which  you
         reasonably object.

                  (c) If,  during such period after the date hereof and prior to
         the date on which all of the  Certificates  shall have been sold by the
         Placement  Agent,  any event shall occur or condition exist as a result
         of which it is necessary in your  judgment to amend or  supplement  the
         Final Memorandum in order to make the statements  therein, in the light
         of the circumstances  when such Memorandum is delivered to a purchaser,
         not  misleading,  or if, with the  opinion of counsel to the  Placement
         Agent it is necessary to amend or supplement  such Memorandum to comply
         with  applicable  law,  forthwith to prepare and furnish,  at their own
         expense,  to the Placement Agent,  either  amendments or supplements to
         such Memorandum so that the statements in such Memorandum as so amended
         or supplemented will not, in the light of the  circumstances  when such
         Memorandum  is delivered to a purchaser,  be misleading or so that such
         Memorandum, as so amended or supplemented,  will comply with applicable
         law.

                  (d) To endeavor to qualify the Certificates for offer and sale
         under  the  securities  or Blue Sky laws of such  jurisdictions  as you
         shall reasonably request.

                  (e) To cause the Financing  Agreements to be duly executed and
         delivered by each of the parties  thereto on or before the Closing Date
         or such later date as may be agreed by the  Guarantor,  the Company and
         the  Placement  Agent  (which later date shall in no case be later than
         October 2, 1997); the  representations  and warranties of the Guarantor
         and the Company contained in each of the Financing  Agreements shall be
         true and  correct  as of the date of  execution  and  delivery  thereof
         (except to the extent  that they  relate  solely to an earlier  date in
         which case they shall be true and correct as of such earlier  date) and
         the  Placement  Agent  shall  have  received  a  certificate  of a Vice
         President of each of the  Guarantor  and the  Company,  dated as of the
         Closing Date (or such later date,  as the case may be), to such effect.
         The Company  agrees to furnish to the Placement  Agent,  promptly after
         the  Closing  Date (or  such  later  date,  as the case may be) and the
         applicable  Delivery  Date  as  defined  in  the  applicable  Financing
         Agreement,  a copy of each opinion  required to be delivered  under the
         applicable  Financing Agreement addressed to the Placement Agent and of
         such other  documents  furnished in connection  with the fulfillment of
         the conditions  precedent therein as the Placement Agent or counsel for
         the Placement Agent may reasonably request.

                  (f)  Whether  or  not  any  sale  of  such   Certificates   is
         consummated,  to pay all expenses  incident to the performance of their
         obligations  under this  Agreement,  including:  (i) the preparation of
         each  Memorandum and all amendments and supplements  thereto,  (ii) the
         preparation,  issuance and delivery of the Certificates, (iii) the fees
         and  disbursements  of the Company's  counsel and  accountants  and the
         Indenture  Trustee,  the  Subordination  Agent,  the Trustees and their
         counsel,  (iv) the qualification of such Certificates  under securities
         or Blue Sky laws in  accordance  with the  provisions  of Section 5(d),
         including filing fees and the fees and disbursements of counsel for the
         Placement  Agent in connection  therewith  and in  connection  with the
         preparation  of any  Blue Sky or legal  investment  memoranda,  (v) the
         printing  and  delivery  to  the  Placement   Agent  in  quantities  as
         hereinabove  stated of copies of the  Memorandum  and any amendments or
         supplements  thereto,  (vi) any fees charged by rating agencies for the
         rating of such Certificates,  (vii) all document production charges and
         expenses of counsel to the  Placement  Agent (but not  including  their
         fees for  professional  services) in connection with the preparation of
         this  Agreement,  (viii) the fees and  expenses,  if any,  incurred  in
         connection  with the  admission  of such  Certificates  for  trading in
         PORTAL  or any  other  appropriate  market  system,  (ix) the costs and
         expenses of the Company relating to investor presentations on any "road
         show" undertaken in connection with the marketing of the  Certificates,
         including, without limitation,  expenses associated with the production
         of road show slides and graphics,  fees and expenses of any consultants
         engaged in connection with the road show  presentations  with the prior
         approval  of  the   Company,   travel  and   lodging   expense  of  the
         representatives  and officers of the Company and any such  consultants,
         and the cost of any  aircraft  chartered  in  connection  with the road
         show, and (x) all other costs and expenses  incident to the performance
         of the obligations of the Guarantor and the Company hereunder for which
         provision is not otherwise made in this Section.

                  (g) Neither the Guarantor,  the Company nor any Affiliate will
         sell, offer for sale or solicit offers to buy or otherwise negotiate in
         respect of any security (as defined in the Securities  Act) which could
         be integrated with the sale of the Certificates in a manner which would
         require the registration under the Securities Act of such Certificates.

                  (h) Not to  solicit  any  offer  to buy or  offer  or sell the
         Certificates  by means of any form of general  solicitation  or general
         advertising  (as  those  terms  are  used in  Regulation  D  under  the
         Securities Act) or in any manner involving a public offering within the
         meaning of Section 4(2) of the Securities Act.

                  (i) While any of the Certificates remain outstanding,  to make
         available,  upon  request,  to any  seller  of  such  Certificates  the
         information  specified in Rule  144A(d)(4)  under the  Securities  Act,
         unless  the  Guarantor  is then  subject  to Section 13 or 15(d) of the
         Exchange Act.

                  (j) None of the Guarantor,  the Company,  their  Affiliates or
         any person  acting on its or their  behalf  (other  than the  Placement
         Agent) will  engage in any  directed  selling  efforts (as that term is
         defined in  Regulation  S) with  respect to the  Certificates,  and the
         Company and their  Affiliates  and each  person  acting on its or their
         behalf (other than the  Placement  Agent) will comply with the offering
         restrictions of Regulation S.

                  (k) For a period of five years after the Closing Date, to make
         available  to  the  Placement  Agent  copies  of  all  annual  reports,
         quarterly  reports and current  reports filed by the Guarantor with the
         Securities and Exchange  Commission (the  "Commission")  on Forms 10-K,
         10-Q and 8-K, or such other  similar  forms as may be designated by the
         Commission, and such other documents,  reports and information as shall
         be  furnished  by the  Company to the  holders of  Certificates  or the
         Guarantor to its security holders generally; provided that at such time
         the Guarantor has securities registered under Section 12(b) or 12(g) of
         the Exchange Act.

                  (l)  During the period of two years  after the  Closing  Date,
         upon  request,  to  furnish  to the  Placement  Agent and any holder of
         Certificates a copy of the  restrictions on transfer  applicable to the
         Certificates.

                  (m) During the period of two years the Closing  Date,  not to,
         and not to permit any of their affiliates (as defined in Rule 144 under
         the Securities Act) to, resell any of the  Certificates  that have been
         reacquired by any of them.

                  (n) During the period of two years after the Closing Date, not
         to be or become an open-end investment  company,  unit investment trust
         or  face-amount  certificate  company  that  is  or is  required  to be
         registered  under  Section  8  of  the  Investment  Company  Act,  or a
         closed-end  investment  company  required  to be  registered,  but  not
         registered, under the Investment Company Act.

                  (o) In connection with the offering, until the Placement Agent
         shall have notified the Guarantor and the Company of the  completion of
         the resale of the  Certificates,  neither  the  Company  nor any of its
         affiliates has bid for or purchased or will bid for or purchase, either
         alone or with one or more other persons, for any account in which it or
         any of its affiliates has a beneficial  interest any Certificates;  and
         neither it nor any of its  affiliates  will make bids or purchases  for
         the purpose of creating actual,  or apparent,  active trading in, or of
         raising the price of, the Certificates.

                  (p) Between the date of this  Agreement  and the Closing Date,
         neither the  Guarantor  nor the Company will without your prior written
         consent  offer,  sell, or enter into any agreement to sell,  any public
         debt  securities  registered  under  the  Securities  Act or  any  debt
         securities  which  may be  resold  in a  transaction  exempt  from  the
         registration  requirements  of the  Securities  Act in reliance on Rule
         144A thereunder and which are marketed  through the use of a disclosure
         document containing  substantially the same information as a prospectus
         for similar debt securities  registered under the Securities Act (other
         than the Certificates).

                  (q) If  requested  by you, to use their best efforts to permit
         the Certificates to be designated  PORTAL securities in accordance with
         the  rules and  regulations  adopted  by the  National  Association  of
         Securities  Dealers,  Inc.  relating  to trading in the PORTAL  Market;
         unless so requested by you, the  Guarantor or the Company will not take
         any  action  to  permit  the  Certificates  to  be  designated   PORTAL
         securities without your prior consent,  which shall not be unreasonably
         withheld.

                  6. Offering of Certificates; Restrictions on Transfer. (a) The
Placement  Agent  represents  and warrants that it is a qualified  institutional
buyer as defined in Rule 144A under the Securities Act (a "QIB").  The Placement
Agent, agrees with the Company that (i) it will not solicit offers for, or offer
or sell,  such  Certificates  by any form of  general  solicitation  or  general
advertising  (as those terms are used in Regulation D under the Securities  Act)
or in any manner  involving a public offering within the meaning of Section 4(2)
of the Securities Act and (ii) it will solicit offers for such Certificates only
from,  and will offer such  Certificates  only to,  persons  that it  reasonably
believes to be (A) in the case of offers inside the United  States,  (x) QIBs or
(y) other  institutional  accredited  investors  (as defined in Rule 501(a) (1),
(2), (3) or (7) under the Securities Act) ("institutional accredited investors")
that,  prior to their  purchase of the  Certificates,  deliver to the  Placement
Agent a letter  containing  the  representations  and  agreements  set  forth in
Appendix III to the Final  Memorandum  and (B) in the case of offers outside the
United States, to persons other than U.S. persons ("foreign  purchasers",  which
term shall  include  dealers  or other  professional  fiduciaries  in the United
States acting on a discretionary basis for foreign beneficial owners (other than
an estate or trust)) that, in each case, in  purchasing  such  Certificates  are
deemed to have  represented and agreed as provided in the Final Memorandum under
the caption "Transfer Restrictions."

                  (b) The Placement Agent, represents, warrants, and agrees with
respect to offers and sales outside the United States that:

                  (i) it understands that no action has been or will be taken in
         any  jurisdiction  by the  Guarantor or the Company that would permit a
         public offering of the  Certificates,  or possession or distribution of
         either Memorandum or any other offering or publicity  material relating
         to the  Certificates,  in any country or jurisdiction  where action for
         that purpose is required;

                  (ii) it will comply with all applicable  laws and  regulations
         in each  jurisdiction in which it acquires,  offers,  sells or delivers
         Certificates or has in its possession or distributes  either Memorandum
         or any such other material, in all cases at its own expense;

                  (iii)  the  Certificates   have  not  been  and  will  not  be
         registered  under the  Securities  Act and may not be  offered  or sold
         within the United  States or to, or for the account or benefit of, U.S.
         persons except in accordance with Regulation S under the Securities Act
         or pursuant to an exemption from the  registration  requirements of the
         Securities Act;

                  (iv) it has offered the  Certificates  and will offer and sell
         the  Certificates  (A) as part of its  distribution at any time and (B)
         otherwise  until 40 days  after  the later of the  commencement  of the
         offering of the  Certificates  and the Closing Date, only in accordance
         with  Rule  903  of  Regulation  S  or  another   exemption   from  the
         registration  requirements of the Securities Act. Accordingly,  neither
         the Placement  Agent,  its  Affiliates nor any persons acting on its or
         their  behalf  have  engaged  or will  engage in any  directed  selling
         efforts  (within  the  meaning  of  Regulation  S) with  respect to the
         Certificates,  and any the Placement Agent, its Affiliates and any such
         persons have  complied  and will comply with the offering  restrictions
         requirements of Regulation S;

                  (v) it has not  offered or sold and will not offer or sell any
         Certificates  to persons in the United Kingdom prior to the expiring of
         the period six months from the issue date of the Certificates except to
         persons whose ordinary  activities involve them in acquiring,  holding,
         managing or disposing of  investments  (as  principal or agent) for the
         purposes of their businesses or otherwise in  circumstances  which have
         not  resulted  and will not  result  in an offer to the  public  in the
         United  Kingdom  within the meaning of the Public  Offers of Securities
         Regulations 1995 (the "Regulations");  (B) has complied and will comply
         with all applicable  provisions of the Financial  Services Act 1986 and
         the Regulations  with respect to anything done by it in relation to the
         Certificates  in, from or otherwise  involving the United Kingdom;  and
         (C) has only  issued or passed on and will only issue or pass on in the
         United Kingdom any document received by it in connection with the issue
         of the  Certificates  to a person who is of a kind described in Article
         11(3) of the Financial  Services Act 1986  (Investment  Advertisements)
         (Exemptions)  Order  1996 or is a  person  to whom  such  document  may
         otherwise lawfully be issued or passed on;

                  (vi) it understands  that the  Certificates  have not been and
         will not be registered  under the Securities and Exchange Law of Japan,
         and represents that it has not offered or sold, and agrees that it will
         not offer or sell, any Certificates, directly or indirectly in Japan or
         to any resident of Japan  except (A) pursuant to an exemption  from the
         registration  requirements  of the Securities and Exchange Law of Japan
         and  (B) in  compliance  with  any  other  applicable  requirements  of
         Japanese law.

Terms used in this Section 6 have the meanings given to them by Regulation S.

                  7. Indemnification and Contribution. (a) The Guarantor and the
Company,  jointly  and  severally,  agree to  indemnify  and hold  harmless  the
Placement  Agent,  and each person,  if any, who  controls the  Placement  Agent
within the meaning of either  Section 15 of the  Securities Act or Section 20 of
the Exchange Act, or is under common  control  with,  or is  controlled  by, the
Placement  Agent,  from and  against  any and all  losses,  claims,  damages and
liabilities  (including,   without  limitation,  any  legal  or  other  expenses
reasonably incurred by the Placement Agent or any such controlling or affiliated
person in connection with defending or  investigating  any such action or claim)
caused by any untrue  statement or alleged  untrue  statement of a material fact
contained in either  Memorandum (as amended or  supplemented if the Guarantor or
the Company shall have  furnished any  amendments or  supplements  thereto),  or
caused by any  omission  or alleged  omission to state  therein a material  fact
necessary to make the  statements  therein in light of the  circumstances  under
which they were made not  misleading,  except  insofar as such  losses,  claims,
damages or  liabilities  are caused by any such untrue  statement or omission or
alleged  untrue  statement or omission  based upon  information  relating to the
Placement  Agent  furnished  to the  Guarantor  or the Company in writing by the
Placement Agent through you expressly for use therein;  provided,  however, that
the foregoing  indemnity  agreement with respect to any  Preliminary  Memorandum
shall not inure to the benefit of the Placement Agent or any person  controlling
the  Placement  Agent if a copy of the  Final  Memorandum  (as then  amended  or
supplemented if the Guarantor or the Company shall have furnished any amendments
or  supplements  thereto) was not sent or given by or on behalf of the Placement
Agent to the person asserting any such losses,  claims,  damages or liabilities,
if  required  by law so to have  been  delivered,  at or  prior  to the  written
confirmation of the sale of the  Certificates  to such person,  and if the Final
Memorandum  (as so amended or  supplemented)  would have cured the defect giving
rise to such losses, claims, damages or liabilities,  unless such failure is the
result of  noncompliance  by the  Guarantor  or the Company  with  Section  5(a)
hereof.

                  (b) The Placement  Agent agrees to indemnify and hold harmless
the Guarantor and the Company, each of their directors,  their officers and each
person,  if any, who controls the Guarantor or the Company within the meaning of
either Section 15 of the Securities Act or Section 20 of the Exchange Act to the
same extent as the foregoing indemnity from the Guarantor and the Company to the
Placement  Agent,  but  only  with  reference  to  information  relating  to the
Placement  Agent  furnished  to the  Guarantor  or the Company in writing by the
Placement  Agent  through  you  expressly  for use in either  Memorandum  or any
amendments or supplements thereto.

                  (c)  In  case  any  proceeding   (including  any  governmental
investigation)  shall be  instituted  involving  any  person in respect of which
indemnity  may be sought  pursuant to either  paragraph  (a) or (b) above,  such
person (the  "indemnified  party") shall promptly notify the person against whom
such  indemnity  may be sought  (the  "indemnifying  party") in writing  and the
indemnifying  party, upon request of the indemnified party, shall retain counsel
reasonably  satisfactory to the  indemnified  party to represent the indemnified
party and any others the indemnifying party may designate in such proceeding and
shall pay the fees and disbursements of such counsel related to such proceeding.
In any such proceeding, any indemnified party shall have the right to retain its
own counsel,  but the fees and expenses of such counsel  shall be at the expense
of such indemnified party unless (i) the indemnifying  party and the indemnified
party shall have  mutually  agreed to the  retention of such counsel or (ii) the
named parties to any such proceeding  (including any impleaded  parties) include
both the indemnifying party and the indemnified party and representation of both
parties by the same counsel  would be  inappropriate  due to actual or potential
differing  interests between them. It is understood that the indemnifying  party
shall not, in connection with any proceeding or related  proceedings in the same
jurisdiction, be liable for the fees and expenses of more than one separate firm
(in addition to any local counsel) for all such indemnified parties and that all
such fees and expenses shall be reimbursed as they are incurred. Such firm shall
be designated  in writing by Morgan  Stanley & Co.  Incorporated  in the case of
parties indemnified  pursuant to paragraph (a) above and by the Guarantor or the
Company in the case of parties indemnified  pursuant to paragraph (b) above. The
indemnifying  party  shall not be liable for any  settlement  of any  proceeding
effected  without its written  consent,  but if settled  with such consent or if
there be a final judgment for the plaintiff,  the  indemnifying  party agrees to
indemnify the indemnified party from and against any loss or liability by reason
of such settlement or judgment.  Notwithstanding the foregoing  sentence,  if at
any time an  indemnified  party shall have  requested an  indemnifying  party to
reimburse the indemnified party for fees and expenses of counsel as contemplated
by the second and third  sentences of this  paragraph,  the  indemnifying  party
agrees that it shall be liable for any  settlement  of any  proceeding  effected
without its written  consent if (i) such settlement is entered into more than 30
days after receipt by such indemnifying  party of the aforesaid request and (ii)
such  indemnifying  party shall not have  reimbursed  the  indemnified  party in
accordance  with  such  request  prior  to  the  date  of  such  settlement.  No
indemnifying  party shall,  without the prior written consent of the indemnified
party, effect any settlement of any pending or threatened  proceeding in respect
of which any indemnified party is or could have been a party and indemnity could
have been sought  hereunder by such  indemnified  party,  unless such settlement
includes an unconditional  release of such indemnified  party from all liability
on claims that are the subject matter of such proceeding.

                  (d)  To  the  extent  the  indemnification   provided  for  in
paragraph (a) or (b) of this Section 7 is unavailable to an indemnified party or
insufficient in respect of any losses, claims, damages or liabilities, then each
indemnifying   party  under  such  paragraph,   in  lieu  of  indemnifying  such
indemnified party thereunder,  shall contribute to the amount paid or payable by
such  indemnified  party  as  a  result  of  such  losses,  claims,  damages  or
liabilities  (i) in such  proportion as is  appropriate  to reflect the relative
benefits  received by the  Guarantor and the Company,  on the one hand,  and the
Placement  Agent, on the other hand,  from the offering of such  Certificates or
(ii) if the  allocation  provided  by  clause  (i)  above  is not  permitted  by
applicable  law, in such  proportion as is  appropriate  to reflect not only the
relative  benefits  referred to in clause (i) above but also the relative  fault
the Guarantor and of the Company on the one hand and the Placement  Agent on the
other hand in connection  with the statements or omissions that resulted in such
losses, claims, damages or liabilities,  as well as any other relevant equitable
considerations.  The relative benefits received by the Guarantor and the Company
on the one hand and the Placement Agent on the other hand in connection with the
offering  of such  Certificates  shall be  deemed  to be in the same  respective
proportions as the net proceeds from the offering of such  Certificates  (before
deducting  expenses)  received  by  the  Trusts  and  the  total  discounts  and
commissions  received  by the  Placement  Agent in respect  thereof  bear to the
aggregate  offering  price  of such  Certificates.  The  relative  fault  of the
Guarantor  and the  Company  on the one hand and of the  Placement  Agent on the
other hand shall be determined by reference to, among other things,  whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission  to state a  material  fact  relates  to  information  supplied  by the
Guarantor or the Company or by the  Placement  Agent and the  parties'  relative
intent,  knowledge,  access to information and opportunity to correct or prevent
such statement or omission.

                  (e) The Guarantor,  the Company and the Placement  Agent agree
that it would not be just or equitable if contribution  pursuant to this Section
7 were  determined  by pro rata  allocation or by any other method of allocation
that  does not take  account  of the  equitable  considerations  referred  to in
paragraph  (d) above.  The amount paid or payable by an  indemnified  party as a
result of the losses,  claims,  damages and liabilities referred to in paragraph
(d) above  shall be deemed to  include,  subject  to the  limitations  set forth
above, any legal or other expenses reasonably incurred by such indemnified party
in  connection  with  investigating  or  defending  any such  action  or  claim.
Notwithstanding  the provisions of this Section 7, the Placement Agent shall not
be required to contribute  any amount in excess of the amount by which the total
price at which the  Certificates  resold by it in the initial  placement of such
Certificates  were offered to  investors  exceeds the amount of any damages that
the Placement  Agent has otherwise been required to pay by reason of such untrue
or alleged untrue statement or omission or alleged omission. No person guilty of
fraudulent  misrepresentation  (within  the  meaning  of  Section  11(f)  of the
Securities  Act) shall be entitled to  contribution  from any person who was not
guilty of such  fraudulent  misrepresentation.  The indemnity  and  contribution
provisions contained in this Section 7 and the representations and warranties of
the Guarantor and the Company contained in this Agreement shall remain operative
and in  full  force  and  effect  regardless  of (i)  any  termination  of  this
Agreement, (ii) any investigation made by or on behalf of the Placement Agent or
any person  controlling  the Placement Agent or by or on behalf of the Guarantor
or the  Company,  its  officers  or  directors  or any  person  controlling  the
Guarantor  or the  Company  and (iii)  acceptance  of and payment for any of the
Certificates.  The remedies provided for in this Section 7 are not exclusive and
shall not limit any rights or remedies  which may  otherwise be available to any
indemnified party at law or in equity.

                  8. Termination. This Agreement shall be subject to termination
by notice given by you to the Company,  if (a) after the  execution and delivery
of this Agreement and prior to the Closing Date (i) trading generally shall have
been  suspended or  materially  limited on or by, as the case may be, any of the
New York Stock Exchange,  the American Stock Exchange,  the National Association
of Securities Dealers,  Inc., the Chicago Board of Options Exchange, the Chicago
Mercantile  Exchange  or  the  Chicago  Board  of  Trade,  (ii)  trading  of any
securities  of the Company  shall have been  suspended on any exchange or in any
over-the-counter  market,  (iii) a  general  moratorium  on  commercial  banking
activities  in New York shall have been  declared by either  Federal or New York
State  authorities  or (iv) there shall have occurred any outbreak or escalation
of  hostilities  or any change in  financial  markets or any  calamity or crisis
that,  in your  judgment,  is material and adverse and (b) in the case of any of
the events  specified  in clauses  (a)(i)  through  (iv),  such event  singly or
together with any other such event makes it, in your judgment,  impracticable to
market the Certificates on the terms and in the manner contemplated in the Final
Memorandum. If this Agreement is terminated by the Placement Agent in accordance
with the  provisions  of this  Section 8, the  Guarantor  and the Company  shall
reimburse the Placement  Agent for all its  reasonable  out-of-pocket  expenses,
including the fees and disbursements of counsel for the Placement Agent.

                  9. All notices and other  communications  under this Agreement
shall be in  writing,  and,  if sent to the  Placement  Agent,  shall be mailed,
delivered or sent by facsimile transmission to:

         Morgan Stanley & Co. Incorporated
         1585 Broadway
         New York, New York 10036
         Attention:  Bruce Paone
         Facsimile number: (212) 761-0786

or, if sent to the Guarantor or the Company, will be mailed,  delivered or sent by facsimile  transmission
to it at:

         Atlantic Coast Airlines
         515 A Shaw Road
         Dulles, VA  20166
         Attention:  General Counsel
         Facsimile number:  (703) 925-6294

with a copy to:

         Gibson, Dunn & Crutcher
         1050 Connecticut Ave., N.W.
         Washington, DC  20036
         Attention:  Ronald O. Mueller, Esq.
         Facsimile number:  (202) 530-9316

                  10.   This   Agreement   may  be  signed  in  any   number  of
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

                  If this Agreement  shall be terminated by the Placement  Agent
because of any failure or refusal on the part of the Guarantor or the Company to
comply with the terms or to fulfill any of the conditions of this Agreement,  or
if for any reason the  Guarantor  or the Company  shall be unable to perform its
obligations  under this Agreement,  the Guarantor and the Company will,  jointly
and  severally,  reimburse the Placement  Agent for all  out-of-pocket  expenses
(including the fees and disbursements of their counsel)  reasonably  incurred by
the  Placement   Agent  in  connection  with  this  Agreement  or  the  offering
contemplated hereunder.

                  This   Agreement   shall  be  governed  by  and  construed  in
accordance with the internal laws of the State of New York.

                  The  headings  of the  sections  of this  Agreement  have been
inserted for  convenience  of  reference  only and shall not be deemed a part of
this Agreement.


<PAGE>


                  Please  confirm your  agreement to the foregoing by signing in
the space  provided  below for that  purpose and  returning to us a copy hereof,
whereupon this Agreement shall constitute a binding agreement between us.


                                                                       Very truly yours,

                                                                       ATLANTIC COAST AIRLINES, INC.


                                                                       By



                                                                       ATLANTIC COAST AIRLINES


                                                                       By


Agreed, September 19, 1997

Morgan Stanley & Co.
    Incorporated


By


<PAGE>


                                                         3










SS_NYL4/246328
SS_NYL4/246328




SS_NYL4/246328
                                   SCHEDULE I


<PAGE>


                                                         3










SS_NYL4/246328



        Pass Through                              Aggregate                                                  Final
         Certificate                              Principal                     Interest                  Distribution
          Designation                              Amounts                        Rate                        Date

           1997-1A                             $57,714,000                        7.20%                    1/1/2014
           1997-1B                              24,734,000                        7.35                     1/1/2011
           1997-1C                              23,333,000                        8.75                     1/1/2007
           1997-1D                               5,805,000                        7.97                     1/1/2000
                                                 ---------

           Total:                             $111,586,000


         Fees payable to the Placement Agent:
         $1,180,766  (1.058 % of the aggregate  principal amount of the  Certificates;  includes  $125,000
         advisory fee pursuant to Engagement Letter of September 9, 1997)


<PAGE>


                                       A-1



</TABLE>

<TABLE>
<S>     <C>
EXHIBIT 10.50(b)

PASS THROUGH TRUST AGREEMENT


<PAGE>


                                                        61







179212.3/NYL2


                  This PASS THROUGH TRUST  AGREEMENT,  dated as of September 25,
1997, among ATLANTIC COAST AIRLINES,  a California  corporation (the "Company"),
ATLANTIC COAST AIRLINES, INC., a Delaware corporation (the "Guarantor"), and THE
FIRST NATIONAL BANK OF MARYLAND, a national banking association,  as Trustee, is
made with  respect to the  formation  of Atlantic  Coast  Airlines  1997-1A Pass
Through Trust and the issuance of 7.20%  Atlantic  Coast  Airlines  1997-1A Pass
Through Certificates representing fractional undivided interests in the Trust.

                  WITNESSETH:

                  WHEREAS,  pursuant to each Indenture,  (i) in the case of each
of the six Canadair  Regional Jet Series 200-ER aircraft  ("CRJs") which will be
leased to the Company  pursuant to the related  Lease (the "Leased  CRJs"),  the
related  Owner Trustee  proposes to issue on a nonrecourse  basis four series of
Equipment  Notes to finance the purchase of the Leased CRJs  referred to in such
Indenture,  (ii) in the case of each of four British  Aerospace  Jetstream  J-41
aircraft  ("J-41s") which will be leased to the Company  pursuant to the related
Lease  (the  "Leased  J-41s",   together  with  the  Leased  CRJs,  the  "Leased
Aircraft"),  the related Owner Trustee proposes to issue on a nonrecourse  basis
three  series of  Equipment  Notes to finance the  purchase of the Leased  J-41s
referred  to in such  Indenture  and (iii) in the case of each of the four J-41s
which are owned by the Company (the "Owned  Aircraft"),  the Company proposes to
issue on a recourse basis three series of Equipment Notes, to finance such Owned
Aircraft;

                  WHEREAS,  the  Trustee,  upon  execution  and delivery of this
Agreement,  hereby declares the creation of this Trust (the "1997-1A Trust") for
the benefit of the Certificateholders,  and the initial  Certificateholders,  as
the  grantors of the  1997-1A  Trust,  by their  respective  acceptances  of the
Certificates, join in the creation of this 1997-1A Trust with the Trustee;

                  WHEREAS,  all  Certificates  to be issued  by the  Trust  will
evidence fractional  undivided interests in the Trust and will convey no rights,
benefits or interests in respect of any property other than the Trust Property;

                  WHEREAS,   pursuant  to  the  terms  and  conditions  of  this
Agreement and each of the Financing Agreements to be entered into by the Trustee
substantially  concurrently  with the execution and delivery of this  Agreement,
the  Trustee  on  behalf  of the  Trust  shall  purchase  one or more  issues of
Equipment  Notes having the same interest rate as, and final  maturity dates not
later  than the final  Regular  Distribution  Date of, the  Certificates  issued
hereunder  and shall hold such  Equipment  Notes in trust for the benefit of the
Certificateholders;

                  WHEREAS,  all of the conditions and requirements  necessary to
make this  Agreement,  when duly executed and  delivered,  a valid,  binding and
legal instrument,  enforceable in accordance with its terms and for the purposes
herein expressed, have been done, performed and fulfilled, and the execution and
delivery of this  Agreement  in the form and with the terms  hereof have been in
all respects duly authorized; and

                  WHEREAS, to facilitate the sale of Equipment Notes to, and the
purchase of Equipment Notes by, the Trustee on behalf of the 1997-1A Trust,  (i)
the Company as the "issuer",  as such term is defined in and solely for purposes
of the  Securities  Act of 1933, as amended,  of the  Certificates  to be issued
pursuant hereto and as the "obligor",  as such term is defined in and solely for
purposes of the Trust  Indenture  Act of 1939, as amended and (ii) the Guarantor
have each duly  authorized  the  execution and delivery of this  Agreement  with
respect  to all  such  Certificates  and  are  undertaking  to  perform  certain
administrative  and ministerial  duties hereunder and is also undertaking to pay
the fees and expenses of the Trustee;

                  NOW,  THEREFORE,  in  consideration  of the mutual  agreements
herein contained,  and of other good and valuable  consideration the receipt and
adequacy of which are hereby acknowledged, the parties hereto agree as follows:


                                    ARTICLE I

                                   DEFINITIONS

                  Section 1.01.  Definitions.  For all purposes of this Agreement, except as otherwise
expressly provided or unless the context otherwise requires:

                  (1) the terms used  herein  that are  defined in this  Article
         have the  meanings  assigned to them in this  Article,  and include the
         plural as well as the singular;

                  (2) all other terms used herein which are defined in the Trust
         Indenture Act, either directly or by reference herein have the meanings
         assigned to them therein;

                  (3) all references in this Agreement to designated "Articles",
         "Sections",  "Subsections" and other subdivisions are to the designated
         Articles,   Sections,   Subsections  and  other  subdivisions  of  this
         Agreement;

                  (4) the words  "herein",  "hereof" and  "hereunder"  and other
         words of similar  import refer to this  Agreement as a whole and not to
         any particular Article, Section, Subsection or other subdivision; and

                  (5) unless the context otherwise requires,  whenever the words
         "including",  "include"  or  "includes"  are used  herein,  it shall be
         deemed to be followed by the phrase "without limitation".

                  Act:  With respect to any Certificateholder has the meaning specified in Section 1.04.

                  Affiliate:  Means, with respect to any specified  Person,  any
         other Person  directly or  indirectly  controlling  or controlled by or
         under direct or indirect common control with such Person.  For purposes
         of this definition,  "control", when used with respect to any specified
         Person,  means the power to direct the  management and policies of such
         Person, directly or indirectly, whether through the ownership of voting
         securities,  by contract or otherwise,  and the terms "controlling" and
         "controlled" have meanings correlative to the foregoing.

                  Agent Members:  Has the meaning specified in Section 3.05(a).

                  Aircraft:  Means the Leased Aircraft and the Owned Aircraft.

                  Authorized Agent:  Means any Paying Agent or Registrar for the Certificates.

                  Avoidable  Tax:  Means a state or  local  tax (i) upon (w) the
         Trust,  (x)  the  Trust  Property,  (y)  Certificateholders  or (z) the
         Trustee for which the Trustee is  entitled to seek  reimbursement  from
         the Trust Property, and (ii) which would be avoided if the Trustee were
         located in another state,  or jurisdiction  within a state,  within the
         United  States.  A tax shall not be an Avoidable  Tax if the Company or
         any Owner Trustee shall agree to pay, and shall pay, such tax.

                  Book-Entry  Certificates:  With  respect to the  Certificates,
         means  a  beneficial  interest  in  the  Certificates,   ownership  and
         transfers  of which shall be made  through book entries as described in
         Section 3.04.

                  Business Day: Means any day other than a Saturday, a Sunday or
         a day on which  commercial banks are required or authorized to close in
         Baltimore, Maryland, New York, New York, or, so long as any Certificate
         is  outstanding,  the city and state in which the  Trustee  or any Loan
         Trustee  maintains its Corporate Trust Office or receives and disburses
         funds.

                  Cedel:  Means Cedel Bank societe anonyme.

                  Certificate:  Means any one of the Certificates executed and authenticated by the
         Trustee, substantially in the form of Exhibit A hereto.

                  Certificate Account:  Means the account or accounts created and maintained  pursuant
         to Section 4.01(a).

                  Certificateholder or Holder:  Means the Person in whose name a Certificate is
         registered in the Register.

                  Clearing Agency:  Means an organization registered as a "clearing agency" pursuant to
         Section 17A of the Securities Exchange Act of 1934, as amended.

                  Clearing Agency  Participant:  Means a broker,  dealer,  bank,
         other financial  institution or other Person for whom from time to time
         a Clearing Agency effects, directly or indirectly, book-entry transfers
         and pledges of securities deposited with the Clearing Agency.

                  Company:  Means Atlantic Coast Airlines, a California corporation, or its successor in
         interest.

                  Controlling Party:  Means the party entitled to act as such pursuant to the terms of
         the Intercreditor Agreement.

                  Corporate  Trust  Office:  With  respect to the Trustee or any
         Loan Trustee,  means the office of such trustee in the city at which at
         any particular  time its corporate  trust business shall be principally
         administered.

                  Cut-off Transfer Date:  Means October 2, 1997.

                  Depositary:  Means The Depository Trust Company, its nominees and their respective
         successors.

                  Direction:  Has the meaning specified in Section 1.04(c).

                  Distribution Date:  Means each Regular Distribution Date or Special Distribution Date.

                  Equipment Notes:  Means the "secured certificates" issued pursuant to the Indentures.

                  Escrow Account:  Has the meaning specified in Section 2.01(b).

                  Escrowed Funds:  Has the meaning specified in Section 2.01(b).

                  Euroclear:  Means the Euroclear System.

                  Event of Default: Means the occurrence of an Indenture Default
         under any Indenture pursuant to which Equipment Notes held by the Trust
         were issued.

                  Financing   Agreements:   Means  each  of  the   Participation
         Agreements and the Note Purchase Agreement listed on Schedule 2 hereto,
         as the same may be amended,  supplemented  or otherwise  modified  from
         time to time in accordance with its terms.

                  Financing Documents: With respect to any Equipment Note, means
         the  related  Indenture,   Financing   Agreement  and,  to  the  extent
         applicable,  the Lease and the other relevant  documents referred to in
         the  definitions  of  "Operative  Agreements"  contained in the related
         Indenture.

                  Fractional Undivided Interest:  Means the fractional undivided interest in the Trust
         that is evidenced by a Certificate.

                  Global Certificates:  Has the meaning assigned to such term in Section 3.01.

                  Guarantor:  Means Atlantic Coast Airlines, Inc., a Delaware corporation, or its
         successors in interest.

                  Indentures: Means each Indenture and Security Agreement listed
         on  Schedule  1  hereto,  in each  case as the same may be  amended  or
         supplemented or otherwise modified from time to time in accordance with
         its terms.

                  Indenture Default:  With respect to any Indenture, means any Indenture Event of
         Default (as such term is defined in such Indenture) thereunder.

                  Initial Purchaser:  Means Morgan Stanley & Co. Incorporated.

                  Initial Regular Distribution Date:  Means the first Regular Distribution Date on which
         a Scheduled Payment is to be made.

                  Institutional  Accredited  Investor:  Means  an  institutional
         investor that is an "accredited  investor" within the meaning set forth
         in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities
         Act.

                  Intercreditor  Agreement:  Means the  Intercreditor  Agreement
         dated  September 25, 1997 among the Trustee,  the Other  Trustees,  the
         Liquidity Provider,  the liquidity  providers,  if any, relating to the
         Certificates  issued  under (and as defined in) the Other Pass  Through
         Trust  Agreements,   and  The  First  National  Bank  of  Maryland,  as
         Subordination Agent thereunder,  as amended,  supplemented or otherwise
         modified from time to time in accordance with its terms.

                  Issuance Date:  Means the date of the issuance of the Initial Certificates.

                  Lease: Means, with respect to each Leased Aircraft,  the lease
         between  an Owner  Trustee,  as the  lessor,  and the  Company,  as the
         lessee, referred to in the related Indenture, as each such lease may be
         amended or supplemented in accordance  with its respective  terms;  and
         Leases means all such leases.

                  Leased Aircraft:  Has the meaning specified in the first recital to this Agreement.

                  Letter of Representations:  Means the agreement dated the Issuance Date among the
         Company, the Trustee and the initial Clearing Agency.

                  Liquidity  Facility:  Means the Irrevocable  Revolving  Credit
         Agreement  dated  September  25,  1997  relating  to the  Certificates,
         between the Liquidity Provider and the Subordination Agent, as amended,
         replaced,  supplemented  or  otherwise  modified  from  time to time in
         accordance with its terms and the terms of the Intercreditor Agreement.

                  Liquidity Provider:  Means, initially, ING Bank N.V.,  and any replacement or
         successor therefor appointed in accordance with the Liquidity Facility and the Intercreditor
         Agreement.

                  Loan  Trustee:  With  respect  to any  Equipment  Note  or the
         Indenture   applicable  thereto,   means  the  bank  or  trust  company
         designated as loan or indenture  trustee under such Indenture;  and any
         successor to such Loan Trustee as such trustee; and Loan Trustees means
         all of the Loan Trustees under the Indentures.

                  Non-U.S. Person:  Means a Person that is not a U.S. Person, as defined in Regulation S.

                  Officer's Certificate:  Means a certificate signed, (a) in the
         case of the  Guarantor  or the  Company,  by (i) the  President  or any
         Executive  Vice  President or Senior Vice President of the Guarantor or
         the Company,  signing alone or (ii) any Vice President of the Guarantor
         or the Company  signing  together  with the  Secretary,  the  Assistant
         Secretary, the Treasurer or any Assistant Treasurer of the Guarantor or
         the Company or (b) in the case of the Trustee or an Owner  Trustee or a
         Loan  Trustee,  a  Responsible  Officer  of the  Trustee  or such Owner
         Trustee or such Loan Trustee, as the case may be.

                  Offshore Certificates Exchange Date:  Has the meaning specified in Section 3.01.

                  Offshore Global Certificates:  Has the meaning assigned to such term in Section 3.01.

                  Offshore Physical Certificates:  Has the meaning assigned to such term in Section 3.01.

                  Opinion of Counsel:  Means a written  opinion of legal counsel
         who (a) in the case of counsel for the  Guarantor or the Company may be
         (i) a senior  attorney in rank of the officers of the  Guarantor or the
         Company  a  principal  duty of which is  furnishing  advice as to legal
         matters or (ii) such other  counsel  designated by the Guarantor or the
         Company and reasonably acceptable to the Trustee and (b) in the case of
         any Owner  Trustee or any Loan  Trustee  may be such  counsel as may be
         designated by any of them whether or not such counsel is an employee of
         any of them, and who shall be reasonably acceptable to the Trustee.

                  Other Pass Through  Trust  Agreement:  Means each of the three
         other  Atlantic  Coast  Airlines  1997-1 Pass Through Trust  Agreements
         relating  to  Atlantic  Coast  Airlines  1997-1B  Pass  Through  Trust,
         Atlantic Coast  Airlines  1997-1C Pass Through Trust and Atlantic Coast
         Airlines  1997-1D Pass Through Trust,  each dated the date hereof;  and
         Other Pass Through Trust Agreements means all such agreements.

                  Other Trustee:  Means the trustee under each of the Other Pass
         Through Trust Agreements,  and any successor or other trustee appointed
         as provided therein; and Other Trustees means all such trustees.

                  Outstanding:  With respect to Certificates, means, as of the date of determination,
         all Certificates theretofore authenticated and delivered under this Agreement, except:

                           (i)      Certificates theretofore cancelled by the Registrar or delivered to
                  the Trustee or the Registrar for cancellation;

                           (ii)  All of the  Certificates  if  money in the full
                  amount  required to make the final  distribution  with respect
                  thereto  pursuant to Section 11.01 hereof has been theretofore
                  deposited  with the  Trustee in trust for the  Holders of such
                  Certificates as provided in Section 4.01 pending  distribution
                  of such  money  to such  Certificateholders  pursuant  to such
                  final distribution payment; and

                           (iii)  Certificates  in  exchange  for or in  lieu of
                  which other Certificates have been authenticated and delivered
                  pursuant to this Agreement.

                  Owned Aircraft:  Has the meaning specified in the first recital to this Agreement.

                  Owner Participant: With respect to any Equipment Note relating
         to a Leased Aircraft,  means the "Owner  Participant" as referred to in
         the Indenture  pursuant to which such  Equipment Note is issued and any
         permitted  successor  or assign of such  Owner  Participant;  and Owner
         Participants  at any  time  of  determination  means  all of the  Owner
         Participants thus referred to in the Indentures.

                  Owner Trustee:  With respect to any Equipment Note relating to
         a Leased  Aircraft,  means the "Owner  Trustee",  as referred to in the
         Indenture  pursuant to which such Equipment Note is issued,  not in its
         individual capacity but solely as trustee; and Owner Trustees means all
         of the Owner Trustees party to any of the Indentures.

                  Participation Agreement:  With respect to any Leased Aircraft,
         means the related Participation  Agreement listed on Schedule 2 hereto,
         as the same may be amended,  supplemented  or otherwise  modified  from
         time to time in accordance with its terms; and Participation Agreements
         means all such agreements.

                  Paying Agent:  Means the paying agent maintained and appointed for the Certificates
         pursuant to Section 7.12.

                  Permanent Offshore Global Certificates:  Has the meaning specified in Section 3.01.

                  Permitted Investments:  Means obligations of the United States
         of America or agencies or instrumentalities  thereof for the payment of
         which the full  faith and  credit of the  United  States of  America is
         pledged,  maturing  in not more than 60 days or such  lesser time as is
         necessary for payment of any Special Payments on a Special Distribution
         Date or any  mutual  fund the  portfolio  of which is  limited  to such
         obligations,  including  any  proprietary  mutual  fund  of  The  First
         National  Bank of  Maryland  for  which  such bank or an  affiliate  is
         investment  advisor or to which such bank provides  other  services and
         receives reasonable compensation for such services.

                  Person:   Means  any   person,   including   any   individual,
         corporation,   partnership,  joint  venture,  association,  joint-stock
         company,  trust,  unincorporated  organization,  or  government  or any
         agency or political subdivision thereof.

                  Physical Certificates:  Has the meaning specified in Section 3.01.

                  Pool  Balance:  Means,  as  of  any  date,  (i)  the  original
         aggregate  face  amount of the  Certificates  less  (ii) the  aggregate
         amount of all payments made in respect of such Certificates  other than
         payments   made  in  respect  of   interest   or  premium   thereon  or
         reimbursement   of  any  costs  or  expenses   incurred  in  connection
         therewith.  The  Pool  Balance  as of any  Distribution  Date  shall be
         computed  after giving effect to the payment of  principal,  if any, on
         the Equipment  Notes or other Trust  Property held in the Trust and the
         distribution thereof to be made on such Distribution Date.

                  Pool Factor:  Means, as of any date, the quotient  (rounded to
         the seventh decimal place) computed by dividing (i) the Pool Balance as
         at  such  date  by (ii)  the  original  aggregate  face  amount  of the
         Certificates.  The Pool  Factor as of any  Distribution  Date  shall be
         computed  after giving effect to the payment of  principal,  if any, on
         the  Equipment  Notes  or other  Trust  Property  and the  distribution
         thereof to be made on such Distribution Date.

                  Postponed Notes:  Means the Equipment Notes to be held in the Trust as to which a
         Postponement Notice shall have been delivered pursuant to Section 2.01(b).

                  Postponement  Notice:  Means an Officer's  Certificate  of the
         Company (1) requesting that the Trustee  temporarily  postpone purchase
         pursuant to one or more of the  Financing  Agreements of certain of the
         Equipment  Notes to a date which is later than the Issuance  Date,  (2)
         identifying  the amount of the  purchase  price of each such  Equipment
         Note and the aggregate purchase price for all such Equipment Notes, (3)
         setting forth the reasons for such postponement and (4) with respect to
         each such  Equipment  Note,  either  (a)  setting  or  resetting  a new
         Transfer Date (which shall be on or prior to the Cut-Off  Transfer Date
         for payment by the Trustee of such  purchase  price and issuance of the
         related  Equipment  Note, or (b) indicating that such new Transfer Date
         (which shall be on or prior to the Cut-off  Transfer  Date) will be set
         by  subsequent  written  notice not less than one Business Day prior to
         such new Transfer Date.

                  Private Placement Legend:  Has the meaning specified in Section 3.02.

                  QIB:  Means a qualified institutional buyer as defined in Rule 144A.

                  Record  Date:   Means  (i)  for   Scheduled   Payments  to  be
         distributed  on any  Regular  Distribution  Date,  other than the final
         distribution,  the 15th day (whether or not a Business  Day)  preceding
         such Regular  Distribution  Date,  and (ii) for Special  Payments to be
         distributed  on any  Special  Distribution  Date,  other than the final
         distribution,  the 15th day (whether or not a Business  Day)  preceding
         such Special Distribution Date.

                  Register and Registrar:  Mean the register maintained and the registrar appointed
         pursuant to Sections 3.04 and 7.12.

                  Regular  Distribution  Date: With respect to  distributions of
         Scheduled  Payments  in  respect of the  Certificates,  means each date
         designated  as a Regular  Distribution  Date in this  Agreement,  until
         payment of all the  Scheduled  Payments to be made under the  Equipment
         Notes held in the Trust have been made; provided, however, that, if any
         such day shall not be a Business Day, the related distribution shall be
         made on the next succeeding Business Day without additional interest.

                  Regulation S: Means  Regulation S under the  Securities Act or
         any successor regulation thereto.

                  Request:  Means a request  by the  Company  setting  forth the
         subject matter of the request  accompanied by an Officer's  Certificate
         and an  Opinion  of  Counsel  as  provided  in  Section  1.02  of  this
         Agreement.

                  Responsible  Officer:  With respect to the  Trustee,  any Loan
         Trustee and any Owner Trustee, means any officer in the Corporate Trust
         Division of the  Trustee,  Loan  Trustee or Owner  Trustee or any other
         officer customarily  performing functions similar to those performed by
         the persons who at the time shall be such officers, respectively, or to
         whom any corporate trust matter is referred because of his knowledge of
         and familiarity with a particular subject.

                  Rule 144A:  Means Rule 144A under the  Securities  Act and any
         successor regulation thereto.

                  Scheduled  Payment:  With respect to any Equipment Note, means
         any payment of  principal  and interest on such  Equipment  Note or any
         payment of  interest  on the  Certificates  with funds  drawn under the
         Liquidity  Facility  (other than any such payment  which is not in fact
         received by the Trustee or any Subordination  Agent within five days of
         the date on which such  payment is  scheduled  to be made) due from the
         obligor  thereon which payment  represents the installment of principal
         at the  stated  maturity  of  such  installment  of  principal  on such
         Equipment Note, the payment of regularly  scheduled interest accrued on
         the unpaid principal  amount of such Equipment Note, or both;  provided
         that any payment of principal,  premium,  if any, or interest resulting
         from the  redemption  or  purchase  of any  Equipment  Note  shall  not
         constitute a Scheduled Payment.

                  SEC:  Means the Securities  and Exchange  Commission,  as from
         time to time  constituted or created under the Securities  Exchange Act
         of 1934,  as amended,  or, if at any time after the  execution  of this
         instrument  such  Commission is not existing and  performing the duties
         now  assigned  to it  under  the  Trust  Indenture  Act,  then the body
         performing such duties on such date.

                  Securities Act:  Means the United States Securities Act of 1933, as amended from time
         to time, or any successor thereto.

                  Special  Distribution Date: Means each date on which a Special
         Payment is to be distributed as specified in this Agreement;  provided,
         however, that, if any such day shall not be a Business Day, the related
         distribution shall be made on the next succeeding  Business Day without
         additional interest.

                  Special Payment: Means (i) any payment (other than a Scheduled
         Payment) in respect of, or any proceeds of, any Equipment Note or Trust
         Indenture  Estate (as  defined  in each  Indenture),  (ii) the  amounts
         required to be  distributed  pursuant to the last  paragraph of Section
         2.01(b) or (iii) the amounts required to be distributed pursuant to the
         penultimate paragraph of Section 2.01(b).

                  Special Payments Account:  Means the account or accounts created and maintained
         pursuant to Section 4.01(b).

                  Specified Investments: Means (i) obligations of, or guaranteed
         by, the United States Government or agencies thereof,  (ii) open market
         commercial paper of any corporation  incorporated under the laws of the
         United States of America or any State thereof rated at least P-2 or its
         equivalent by Moody's  Investors  Service,  Inc. or at least A-2 or its
         equivalent  by Standard & Poor's Rating Group,  (iii)  certificates  of
         deposit  issued by  commercial  banks  organized  under the laws of the
         United States or of any political subdivision thereof having a combined
         capital  and  surplus in excess of  $500,000,000  which  banks or their
         holding  companies  have a rating  of A or its  equivalent  by  Moody's
         Investors  Service,  Inc. or Standard & Poor's Rating Group;  provided,
         however,  that the  aggregate  amount  at any one time so  invested  in
         certificates  of deposit  issued by any one bank shall not exceed 5% of
         such bank's capital and surplus,  (iv) U.S. dollar denominated offshore
         certificates  of deposit issued by, or offshore time deposits with, any
         commercial  bank  described  in (iii) or any  subsidiary  thereof,  (v)
         repurchase  agreements with any financial  institution  having combined
         capital  and  surplus  of  at  least   $500,000,000  with  any  of  the
         obligations  described  in clauses (i) through (iv) as  collateral  and
         (vi) any mutual fund the  portfolio of which is limited to  investments
         of the types  specified  in the  preceding  clauses  (i)  through  (v),
         including  any  proprietary  mutual fund of The First  National Bank of
         Maryland for which such bank or an affiliate is  investment  advisor or
         to which such bank  provides  other  services and  receives  reasonable
         compensation  for such  services;  provided  further that if all of the
         above  investments are  unavailable,  the entire amounts to be invested
         may be used to  purchase  Federal  Funds  from an entity  described  in
         clause (iii) above.

                  Subordination Agent:  Has the meaning specified in the Intercreditor Agreement.

                  Temporary Offshore Global Certificates:  Has the meaning specified in Section 3.01.

                  Transfer Date:  Has the meaning assigned to the term "Delivery Date" in each Financing
         Agreement.

                  Triggering Event:  Has the meaning assigned to such term in the Intercreditor
         Agreement.

                  Trust:  Means the trust created by this Agreement, the estate of which consists of the
         Trust Property.

                  Trust Indenture Act:  Except as otherwise provided in Section 9.06, means the United
         States Trust Indenture Act of 1939 as in force at the date hereof.

                  Trust  Property:  Means (i) the  Equipment  Notes  held as the
         property  of the  Trust,  all monies at any time paid  thereon  and all
         monies due and to become due  thereunder,  (ii) the rights of the Trust
         under any Intercreditor  Agreement,  including all monies receivable in
         respect of such rights, (iii) all monies receivable under the Liquidity
         Facility  and (iv)  funds  from time to time  deposited  in the  Escrow
         Account,  the Certificate  Account and the Special Payments Account and
         any proceeds from the sale by the Trustee pursuant to Article VI hereof
         of any such Equipment Note.

                  Trustee:  Means The First National Bank of Maryland, or its successor in interest, and
         any successor or other trustee appointed as provided herein.

                  Trustee's Lien:  Has the meaning specified in Section 7.17.

                  U.S. Global Certificate:  Has the meaning specified in Section 3.01.

                  U.S. Physical Certificates:  Has the meaning specified in Section 3.01.

                  Section 1.02. Compliance  Certificates and Opinions.  Upon any
application or request by the Company,  any Owner Trustee or any Loan Trustee to
the  Trustee to take any  action  under any  provision  of this  Agreement,  the
Company,  such Owner  Trustee or such Loan  Trustee,  as the case may be,  shall
furnish to the Trustee (i) an Officer's Certificate stating that, in the opinion
of the signers, all conditions precedent, if any, provided for in this Agreement
relating to the proposed  action have been  complied with and (ii) an Opinion of
Counsel  stating  that  in the  opinion  of such  counsel  all  such  conditions
precedent,  if any, have been complied with, except that in the case of any such
application  or  request  as to  which  the  furnishing  of  such  documents  is
specifically  required  by any  provision  of this  Agreement  relating  to such
particular  application or request, no additional certificate or opinion need be
furnished.

                  Every certificate or opinion with respect to compliance with a
condition or covenant  provided for in this Agreement  (other than a certificate
provided pursuant to Section 8.04(d)) shall include:

                  (1) a statement that each individual  signing such certificate
         or opinion has read such covenant or condition and the  definitions  in
         this Agreement relating thereto;

                  (2) a  brief  statement  as to the  nature  and  scope  of the
         examination  or  investigation  upon which the  statements  or opinions
         contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of each such  individual,
         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,  in the opinion of each such
         individual, such condition or covenant has been complied with.

                  Section 1.03. Form of Documents  Delivered to Trustee.  In any
case where  several  matters are required to be  certified  by, or covered by an
opinion of, any specified  Person,  it is not necessary that all such matters be
certified  by, or covered by the opinion of, only one such Person,  or that they
be so certified or covered by only one document, but one such Person may certify
or give an  opinion  with  respect  to some  matters  and one or more other such
Persons as to other  matters  and any such Person may certify or give an opinion
as to such matters in one or several documents.

                  Any  Opinion of Counsel  stated to be based on the  opinion of
other counsel shall be accompanied by a copy of such other opinion.

                  Where any Person is required  to make,  give or execute two or
more applications,  requests, consents,  certificates,  statements,  opinions or
other instruments under this Agreement,  they may, but need not, be consolidated
and form one instrument.

                  Section 1.04. Acts of  Certificateholders.  (a) Any direction,
consent,  waiver or other action provided by this Agreement to be given or taken
by  Certificateholders  may  be  embodied  in  and  evidenced  by  one  or  more
instruments of substantially similar tenor signed by such  Certificateholders in
person or by an agent or proxy duly appointed in writing;  and, except as herein
otherwise  expressly  provided,  such action  shall become  effective  when such
instrument or  instruments  are delivered to the Trustee and, where it is hereby
expressly  required  pursuant  to this  Agreement,  to the  Company  or any Loan
Trustee.  Such instrument or instruments  (and the action  embodied  therein and
evidenced  thereby)  are  herein  sometimes  referred  to as  the  "Act"  of the
Certificateholders signing such instrument or instruments. Proof of execution of
any  such  instrument  or of a  writing  appointing  any  such  agent  shall  be
sufficient  for any purpose of this  Agreement  and  conclusive  in favor of the
Trustee,  the Company and any Loan  Trustee,  if made in the manner  provided in
this Section.

                  (b) The fact and date of the  execution  by any  Person of any
such instrument or writing may be proved by the certificate of any notary public
or other officer of any jurisdiction authorized to take acknowledgments of deeds
or administer  oaths that the Person  executing such instrument  acknowledged to
him the  execution  thereof,  or by an affidavit of a witness to such  execution
sworn to before any such notary or such other  officer and where such  execution
is by an officer of a corporation  or  association or a member of a partnership,
on behalf of such corporation,  association or partnership,  such certificate or
affidavit shall also constitute sufficient proof of his authority.  The fact and
date of the execution of any such instrument or writing, or the authority of the
Person  executing the same,  may also be proved in any other  reasonable  manner
which the Trustee deems sufficient.

                  (c)  In  determining  whether  the  Certificateholders  of the
requisite Fractional Undivided Interests of Certificates  Outstanding have given
any  direction,   consent  or  waiver  (a  "Direction")  under  this  Agreement,
Certificates owned by the Company,  the Guarantor,  any Owner Trustee, any Owner
Participant or any Affiliate of any such Person thereof shall be disregarded and
deemed  not to be  Outstanding  for  purposes  of  any  such  determination.  In
determining  whether the Trustee  shall be  protected  in relying  upon any such
Direction,  only Certificates which the Trustee knows to be so owned shall be so
disregarded.  Notwithstanding the foregoing, (i) if any such Person owns 100% of
the Certificates  Outstanding,  such Certificates shall not be so disregarded as
aforesaid,  and (ii) if any amount of  Certificates  so owned by any such Person
have been pledged in good faith, such  Certificates  shall not be disregarded as
aforesaid  if the pledgee  establishes  to the  satisfaction  of the Trustee the
pledgee's right so to act with respect to such Certificates and that the pledgee
is not the Company,  the Guarantor,  any Owner Trustee, any Owner Participant or
any Affiliate of any such Person.

                  (d) The Company may at its option, by delivery of an Officer's
Certificate   to  the   Trustee,   set  a   record   date   to   determine   the
Certificateholders entitled to give any consent, request, demand, authorization,
direction,  notice,  waiver or other Act.  Such  record date shall be the record
date  specified in such  Officer's  Certificate,  which shall be a date not more
than 30 days prior to the first solicitation of Certificateholders in connection
therewith.  If such a record  date is  fixed,  such  consent,  request,  demand,
authorization,  direction,  notice,  waiver or other Act may be given  before or
after such record date, but only the  Certificateholders  of record at the close
of business on such record date shall be deemed to be Certificateholders for the
purposes of determining whether  Certificateholders  of the requisite proportion
of  Outstanding  Certificates  have  authorized  or agreed or  consented to such
consent, request, demand, authorization, direction, notice, waiver or other Act,
and for that purpose the Outstanding  Certificates  shall be computed as of such
record date;  provided that no such  consent,  request,  demand,  authorization,
direction,  notice, waiver or other Act by the Certificateholders on such record
date shall be deemed effective unless it shall become effective  pursuant to the
provisions of this Agreement not later than one year after such record date.

                  (e) Any  direction,  consent,  waiver  or other  action by the
Certificateholder  of any Certificate shall bind the  Certificateholder of every
Certificate  issued upon the transfer thereof or in exchange therefor or in lieu
thereof, whether or not notation of such action is made upon such Certificate.

                  (f)  Except  as   otherwise   provided  in  Section   1.04(c),
Certificates  owned  by or  pledged  to any  Person  shall  have  an  equal  and
proportionate   benefit  under  the  provisions  of  this   Agreement,   without
preference, priority, or distinction as among all of the Certificates.


                                   ARTICLE II

                       ORIGINAL ISSUANCE OF CERTIFICATES;
                         ACQUISITION OF EQUIPMENT NOTES

                  Section  2.01.   Issuance  of  Certificates;   Acquisition  of
Equipment  Notes.  (a) The Trustee is hereby directed to execute and deliver the
Intercreditor  Agreement and each of the Financing Agreements on or prior to the
Issuance Date,  each in the form  delivered to the Trustee by the Company.  Upon
oral or written request of the Company or the Company's counsel acting on behalf
of the Company and the satisfaction of the closing conditions  specified in each
of the Financing Agreements, the Trustee shall execute, deliver and authenticate
Certificates  equalling in the aggregate the aggregate  principal  amount of the
Equipment Notes to be purchased by the Trustee pursuant to each of the Financing
Agreements on the Transfer Date, and evidencing the entire ownership interest in
the Trust.  The Trustee  shall issue and sell such  Certificates,  in authorized
denominations and in such Fractional Undivided Interests, so as to result in the
receipt of consideration  in an amount equal to the aggregate  purchase price of
such Equipment Notes and,  concurrently  therewith,  the Trustee shall purchase,
pursuant to the terms and conditions of the Financing Agreements,  the Equipment
Notes at a purchase price equal to the amount of such consideration so received.
Except as provided  in  Sections  3.04 and 3.07  hereof,  the Trustee  shall not
execute,  authenticate or deliver Certificates in excess of the aggregate amount
specified in this  paragraph.  The provisions of this Subsection (a) are subject
to the provisions of Subsection (b) below.

                  (b) If on or prior to the  Issuance  Date  the  Company  shall
deliver to the Trustee a Postponement  Notice  relating to one or more Postponed
Notes, the Trustee shall postpone the purchase of such Postponed Notes and shall
deposit into an escrow account (the "Escrow Account") to be maintained as a part
of the Trust an amount equal to the purchase price of such Postponed  Notes (the
"Escrowed  Funds").  The Escrowed  Funds so  deposited  shall be invested by the
Trustee at the written  direction  of the Company in Specified  Investments  (i)
maturing no later than any  scheduled  Transfer  Date  relating to the Postponed
Notes or (ii) if no such Transfer Date has been scheduled,  maturing on the next
Business  Day, or (iii) if the Company has given  notice to the Trustee that any
Postponed Notes will not be issued,  with respect to the portion of the Escrowed
Funds relating to such Postponed Notes,  maturing on the next applicable Special
Distribution  Date, if such  investments are reasonably  available for purchase.
The Trustee shall make  withdrawals  from the Escrow Account only as provided in
this  Agreement.  Upon request of the Company on one or more  occasions  and the
satisfaction  of the closing  conditions  specified in the applicable  Financing
Agreements on or prior to the related  Cut-off  Transfer Date, the Trustee shall
purchase the applicable  Postponed  Notes with the Escrowed Funds withdrawn from
the Escrow Account.  The purchase price shall equal the principal amount of such
Postponed Notes.

                  The Trustee  shall hold all  Specified  Investments  until the
maturity thereof and will not sell or otherwise transfer Specified  Investments.
If  Specified  Investments  held  in an  Escrow  Account  mature  prior  to  any
applicable  Transfer  Date,  any  proceeds  received  on the  maturity  of  such
Specified  Investments  (other than any earnings thereon) shall be reinvested by
the Trustee at the written  direction  of the Company in  Specified  Investments
maturing as provided in the preceding paragraph.

                  Any earnings on Specified  Investments  received  from time to
time by the Trustee shall be promptly  distributed  to the Company.  The Company
shall pay to the Trustee for  deposit to the Escrow  Account an amount  equal to
any losses on such Specified Investments as incurred.

                  On the Initial Regular Distribution Date, the Company will pay
(in immediately  available funds) to the Trustee an amount equal to the interest
that would have accrued on any  Postponed  Notes,  if any,  purchased  after the
Issuance Date if such  Postponed  Notes had been purchased on the Issuance Date,
from the Issuance Date to, but not  including,  the date of the purchase of such
Postponed Notes by the Trustee.

                  If the  Company  notifies  the  Trustee  prior to the  Cut-off
Transfer  Date that any  Postponed  Notes  will not be issued on or prior to the
Cut-off  Transfer  Date for any reason,  on the next Special  Distribution  Date
occurring  more than 20 days  following  the date of such notice (i) the Company
shall pay to the  Trustee  for  deposit  in the  Special  Payments  Account,  in
immediately  available  funds,  an amount equal to the interest  that would have
accrued on the Postponed Notes  designated in such notice at a rate equal to the
interest rate applicable to the Certificates  from the Issuance Date to, but not
including, such Special Distribution Date and (ii) the Trustee shall transfer an
amount  equal to that  amount of  Escrowed  Funds  that  would have been used to
purchase the  Postponed  Notes  designated in such notice and the amount paid by
the Company  pursuant  to the  immediately  preceding  clause (i) to the related
Special  Payments  Account for  distribution  as a Special Payment in accordance
with the provisions hereof.

                  If, on the Cut-off Transfer Date, an amount equal to less than
all  of the  Escrowed  Funds  (other  than  Escrowed  Funds  referred  to in the
immediately  preceding  paragraph) has been used to purchase Postponed Notes, on
the next Special  Distribution  Date  occurring  more than 20 days following the
Cut-off  Transfer  Date (i) the Company  shall pay to the Trustee for deposit in
the Special Payments Account, in immediately available funds, an amount equal to
the interest that would have accrued on such Postponed Notes  contemplated to be
purchased with such unused Escrowed Funds (other than Escrowed Funds referred to
in the immediately  preceding paragraph) but not so purchased at a rate equal to
the interest rate applicable to the Certificates  from the Issuance Date to, but
not  including,  such  Special  Distribution  Date and (ii)  the  Trustee  shall
transfer such unused Escrowed Funds and the amount paid by the Company  pursuant
to the immediately  preceding  clause (i) to such Special  Payments  Account for
distribution as a Special Payment in accordance with the provisions hereof.

                  Section  2.02.  Acceptance by Trustee.  The Trustee,  upon the
execution and delivery of this  Agreement,  acknowledges  its  acceptance of all
right,  title and interest in and to the Equipment  Notes  acquired  pursuant to
Section 2.01 hereof and the Financing  Agreements  and declares that the Trustee
holds and will hold such  right,  title and  interest,  together  with all other
property  constituting  the Trust Property,  for the benefit of all then present
and  future  Certificateholders,  upon the trusts  herein set forth.  Subject to
Section 7.14, the Trustee shall take all actions reasonably  necessary to effect
the  registration of all such Equipment  Notes in the name of the  Subordination
Agent. By its payment for and acceptance of each Certificate  issued to it under
this Agreement,  each initial  Certificateholder as grantor of the Trust thereby
joins in the creation and declaration of the Trust.

                  Section 2.03.  Limitation of Powers.  The Trust is constituted
solely for the purpose of making the  investment  in the Equipment  Notes,  and,
except as set forth herein,  the Trustee shall not be authorized or empowered to
acquire  any  other  investments  or  engage in any  other  activities  and,  in
particular, the Trustee shall not be authorized or empowered to do anything that
would  cause such Trust to fail to  qualify  as a  "grantor  trust" for  federal
income tax purposes  (including  as subject to this  restriction,  acquiring any
Aircraft (as defined in the  respective  Indentures)  by bidding such  Equipment
Notes or otherwise,  or taking any action with respect to any such Aircraft once
acquired).


                                   ARTICLE III

                                THE CERTIFICATES

                  Section  3.01.  Title,  Form,  Denomination  and  Execution of
Certificates.  (a) The  Certificates  shall be known as the "7.20%  1997-1A Pass
Through Certificates" of the Trust. Each Certificate will represent a fractional
undivided interest in the Trust and shall be substantially in the form set forth
as Exhibit A hereto, with such appropriate insertions, omissions,  substitutions
and other variations as are required or permitted by this Agreement and may have
such  letters,  numbers or other  marks of  identification  and such  legends or
endorsements  placed  thereon as may be required to comply with the rules of any
securities  exchange or as may,  consistently  herewith,  be  determined  by the
officers  executing such  Certificates,  as evidenced by their  execution of the
Certificates. Any portion of the text of any Certificate may be set forth on the
reverse  thereof,  with an  appropriate  reference  thereto  on the  face of the
Certificate.

                  (b) The Certificates  shall be issued only in fully registered
form without coupons and only in denominations of $100,000 or integral multiples
of $1,000 in excess  thereof,  except  that one  Certificate  may be issued in a
denomination of less than $100,000.  Each Certificate shall be dated the date of
its authentication.  The aggregate Fractional Undivided Interest of Certificates
shall not at any time exceed $57,714,000.

                  (c)  Certificates  offered  and sold in  reliance on Rule 144A
shall be issued initially in the form of a single  permanent global  Certificate
in registered form, substantially in the form set forth as Exhibit A hereto (the
"U.S.  Global  Certificate"),  duly executed and authenticated by the Trustee as
hereinafter provided. The U.S. Global Certificate will be registered in the name
of a nominee for the Depositary and deposited with the Trustee, as custodian for
the Depositary.  The aggregate  principal amount of the U.S. Global  Certificate
may from time to time be  increased  or  decreased  by  adjustments  made on the
records of the  Depositary or its nominee,  or of the Trustee,  as custodian for
the Depositary or its nominee, as hereinafter provided.

                  (d) Certificates offered and sold in offshore  transactions in
reliance  on  Regulation  S shall be  issued  initially  in the form of a single
temporary global  Certificate in registered form,  substantially in the form set
forth as Exhibit A hereto (the  "Temporary  Offshore Global  Certificate")  duly
executed and authenticated by the Trustee as hereinafter provided. The Temporary
Offshore Global  Certificate  will be registered in the name of a nominee of the
Depositary for credit to the account of the Agent Members acting as depositaries
for  Euroclear  and Cedel and  deposited  with the Trustee as custodian  for the
Depositary. At any time on or after November 5, 1997 (the "Offshore Certificates
Exchange Date"),  upon receipt by the Trustee of a certificate  substantially in
the  form of  Exhibit  B  hereto,  a  single  permanent  global  Certificate  in
registered form substantially in the form set forth in Exhibit A (the "Permanent
Offshore Global  Certificate";  and together with the Temporary  Offshore Global
Certificate,   the   "Offshore   Global   Certificates"),   duly   executed  and
authenticated by the Trustee as hereinafter provided, shall be registered in the
name of a  nominee  for the  Depositary  and  deposited  with  the  Trustee,  as
custodian for the  Depositary,  and the Registrar shall reflect on its books and
records the date of such transfer and a decrease in the principal  amount of any
Temporary Offshore Global Certificate in an amount equal to the principal amount
of the  beneficial  interest  in  such  Temporary  Offshore  Global  Certificate
transferred.  The U.S. Global  Certificate and the Offshore Global  Certificates
are sometimes referred to as the "Global Certificates".

                  (e) Certificates offered and sold to Institutional  Accredited
Investors shall be issued in the form of permanent certificated  Certificates in
registered  form in  substantially  the form set forth as Exhibit A hereto  (the
"U.S. Physical  Certificates").  Certificates issued pursuant to Section 3.05(b)
in exchange for  interests in any Offshore  Global  Certificate  shall be in the
form of permanent certificated  Certificates in registered form substantially in
the form set forth in  Exhibit A (the  "Offshore  Physical  Certificates").  The
Offshore  Physical  Certificates  and U.S.  Physical  Certificates are sometimes
collectively herein referred to as the "Physical Certificates".

                  (f) The definitive  Certificates  shall be in registered  form
and shall be  typed,  printed,  lithographed  or  engraved  or  produced  by any
combination  of these  methods or may be  produced in any other  manner,  all as
determined by the officers  executing such  Certificates,  as evidenced by their
execution of such Certificates.

                  Section 3.02.  Restrictive Legends.  (a)  Subject to Section 3.06, each Global
Certificate (other than the Permanent Offshore Global Certificate) and each U.S. Physical Certificate
shall bear the following legend (the "Private Placement Legend") on the face thereof:

                  THIS  CERTIFICATE  HAS NOT  BEEN  REGISTERED  UNDER  THE  U.S.
         SECURITIES  ACT  OF  1933,  AS  AMENDED  (THE  "SECURITIES  ACT"),  AND
         ACCORDINGLY, 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 ITS  ACQUISITION  HEREOF,  THE HOLDER (1)
         REPRESENTS THAT (A) IT IS A "QUALIFIED INSTITUTIONAL BUYER" (AS DEFINED
         IN RULE 144A  UNDER THE  SECURITIES  ACT),  (B) IT IS AN  INSTITUTIONAL
         "ACCREDITED INVESTOR" (AS DEFINED IN RULE 501(a)(1), (2), (3) OR (7) OF
         REGULATION D UNDER THE SECURITIES  ACT) (AN  "INSTITUTIONAL  ACCREDITED
         INVESTOR")  OR  (C)  IT IS NOT A U.S.  PERSON  AND  IS  ACQUIRING  THIS
         CERTIFICATE IN AN OFFSHORE  TRANSACTION IN COMPLIANCE WITH REGULATION S
         UNDER THE SECURITIES  ACT; (2) AGREES THAT IT WILL NOT WITHIN TWO YEARS
         AFTER THE LATER OF THE  ORIGINAL  ISSUANCE OF THIS  CERTIFICATE  OR THE
         LAST DATE ON WHICH THIS CERTIFICATE WAS HELD BY ATLANTIC COAST AIRLINES
         ("ACA") OR ANY  AFFILIATE  OF ACA,  RESELL OR OTHERWISE  TRANSFER  THIS
         CERTIFICATE EXCEPT (A) TO ACA OR ANY SUBSIDIARY THEREOF, (B) INSIDE THE
         UNITED STATES TO A QUALIFIED  INSTITUTIONAL  BUYER IN  COMPLIANCE  WITH
         RULE 144A UNDER THE SECURITIES  ACT, (C) INSIDE THE UNITED STATES TO AN
         INSTITUTIONAL  ACCREDITED INVESTOR ACQUIRING $100,000 OR MORE AGGREGATE
         PRINCIPAL  AMOUNT OF SUCH  CERTIFICATES  THAT,  PRIOR TO SUCH TRANSFER,
         FURNISHES   TO  THE  TRUSTEE  A  SIGNED   LETTER   CONTAINING   CERTAIN
         REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER
         OF THIS  CERTIFICATE (THE FORM OF WHICH LETTER CAN BE OBTAINED FROM THE
         TRUSTEE),  (D) OUTSIDE THE UNITED STATES IN AN OFFSHORE  TRANSACTION IN
         COMPLIANCE  WITH RULE 904 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 AN  EFFECTIVE  REGISTRATION
         STATEMENT UNDER THE SECURITIES ACT; AND (3) AGREES THAT IT WILL DELIVER
         TO EACH  PERSON  TO WHOM  THIS  CERTIFICATE  IS  TRANSFERRED  A  NOTICE
         SUBSTANTIALLY  TO THE EFFECT OF THIS  LEGEND.  IN  CONNECTION  WITH ANY
         TRANSFER  OF THIS  CERTIFICATE  WITHIN TWO YEARS AFTER THE LATER OF THE
         ORIGINAL  ISSUANCE OF THIS  CERTIFICATE  OR THE LAST DATE ON WHICH THIS
         CERTIFICATE  WAS HELD BY ACA OR AN  AFFILIATE  OF ACA,  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 THE TRUSTEE.
         IF THE PROPOSED TRANSFEREE IS AN INSTITUTIONAL ACCREDITED INVESTOR, THE
         HOLDER  MUST,  PRIOR TO SUCH  TRANSFER,  FURNISH TO THE TRUSTEE AND ACA
         SUCH  CERTIFICATIONS,  LEGAL OPINIONS OR OTHER INFORMATION AS EITHER OF
         THEM 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.
         THE PASS THROUGH  TRUST  AGREEMENT  CONTAINS A PROVISION  REQUIRING THE
         TRUSTEE TO REFUSE TO  REGISTER  ANY  TRANSFER  OF THIS  CERTIFICATE  IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.

                  (b)      Each Global Certificate shall also bear the following legend on the face
thereof:

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
         THE DEPOSITORY TRUST COMPANY,  A NEW YORK CORPORATION  ("DTC"),  TO THE
         TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND  ANY  CERTIFICATE  ISSUED  IN  EXCHANGE  FOR  THIS  CERTIFICATE  IS
         REGISTERED  IN THE  NAME OF  CEDE & CO.  OR IN  SUCH  OTHER  NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL  CERTIFICATE  SHALL BE LIMITED TO TRANSFERS IN
         WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR
         SUCH  SUCCESSOR'S  NOMINEE  AND  TRANSFERS  OF  PORTIONS OF THIS GLOBAL
         CERTIFICATE  SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH THE
         RESTRICTIONS  SET FORTH IN SECTIONS  3.05 AND 3.06 OF THE PASS  THROUGH
         TRUST AGREEMENT REFERRED TO HEREIN.

                  Section 3.03. Authentication of Certificates.  (a) The Trustee
shall  duly  execute,   authenticate  and  deliver  Certificates  in  authorized
denominations  equalling in the aggregate the aggregate  principal amount of the
Equipment  Notes  to be  purchased  by the  Trustee  pursuant  to the  Financing
Agreements and evidencing the entire ownership of the Trust.

                  (b) No Certificate shall be entitled to any benefit under this
Agreement or be valid or  obligatory  for any purpose,  unless there  appears on
such  Certificate  a certificate  of  authentication  substantially  in the form
provided  for herein  executed by the Trustee by the manual  signature of one of
its authorized  signatories,  and such certificate upon any Certificate shall be
conclusive evidence, and the only evidence,  that such Certificate has been duly
authenticated and delivered hereunder.

                  Section 3.04.  Transfer and Exchange.  The Trustee shall cause
to be kept at the office or agency to be maintained by it in accordance with the
provisions of Section 7.12 of this Agreement a register (the "Register") for the
Certificates  in  which,  subject  to  such  reasonable  regulations  as it  may
prescribe,  the Trustee shall provide for the  registration of the  Certificates
and of transfers  and  exchanges of the  Certificates  as herein  provided.  The
Trustee shall  initially be the registrar (the  "Registrar")  for the purpose of
registering the  Certificates and transfers and exchanges of the Certificates as
herein  provided.  A  Certificateholder  may transfer a  Certificate  by written
application  to the Registrar  stating the name of the proposed  transferee  and
otherwise  complying  with the terms of this  Agreement,  including  providing a
written  certificate or other evidence of compliance  with any  restrictions  on
transfer.  No such transfer shall be effected until,  and such transferee  shall
succeed to the rights of a  Certificateholder  only upon,  final  acceptance and
registration  of the  transfer by the  Registrar in the  Register.  Prior to the
registration  of any transfer by a  Certificateholder  as provided  herein,  the
Trustee  shall treat the person in whose name the  Certificate  is registered as
the owner  thereof for all  purposes,  and the Trustee  shall not be affected by
notice to the contrary.  Furthermore,  the Depositary  shall, by acceptance of a
Global Certificate,  agree that transfers of beneficial interests in such Global
Certificate may be effected only through a book-entry  system  maintained by the
Depositary (or its agent),  and that  ownership of a beneficial  interest in the
Certificate shall be required to be reflected in a book entry. When Certificates
are  presented  to the  Registrar  with a request to register the transfer or to
exchange  them for an equal  face  amount of  Certificates  of other  authorized
denominations, the Registrar shall register the transfer or make the exchange as
requested  if  its  requirements  for  such  transactions  are  met.  To  permit
registrations   of  transfers  and  exchanges  in  accordance  with  the  terms,
conditions and restrictions  hereof,  the Trustee shall execute and authenticate
Certificates at the Registrar's request. No service charge shall be made for any
registration  of transfer or exchange of the  Certificates,  but the Trustee may
require  payment by the transferor of a sum sufficient to cover any transfer tax
or similar  governmental charge payable in connection  therewith (other than any
such transfer taxes or other similar governmental charges payable upon exchanges
pursuant to Section 3.10 or 9.07).

                  Section   3.05.   Book-Entry   Provisions   for  U.S.   Global
Certificate  and Offshore Global  Certificates.  (a) Members of, or participants
in, the Depositary  ("Agent  Members") shall have no rights under this Agreement
with respect to any Global  Certificate  held on their behalf by the Depositary,
or the  Trustee  as its  custodian,  and the  Depositary  may be  treated by the
Trustee  and any  agent of the  Trustee  as the  absolute  owner of such  Global
Certificate for all purposes whatsoever.  Notwithstanding the foregoing, nothing
herein shall  prevent the Trustee or any agent of the Trustee from giving effect
to any written  certification,  proxy or other  authorization  furnished  by the
Depositary or shall impair, as between the Depositary and its Agent Members, the
operation  of  customary  practices  governing  the  exercise of the rights of a
holder of any  Certificate.  Upon the  issuance of any Global  Certificate,  the
Registrar or its duly  appointed  agent shall record a nominee of the Depositary
as the registered holder of such Global Certificate.

                  (b)  Transfers of any Global  Certificate  shall be limited to
transfers of such Global  Certificate in whole,  but not in part, to nominees of
the Depositary, its successor or such successor's nominees. Beneficial interests
in the U.S.  Global  Certificate  and any  Offshore  Global  Certificate  may be
transferred  in accordance  with the rules and  procedures of the Depositary and
the  provisions  of  Section  3.06.  Beneficial  interests  in the  U.S.  Global
Certificate  or an  Offshore  Global  Certificate  shall  be  delivered  to  all
beneficial owners in the form of U.S. Physical Certificates or Offshore Physical
Certificates,  as the case may be, if (i) the  Company  notifies  the Trustee in
writing that the  Depositary  is  unwilling or unable to discharge  properly its
responsibilities  as Depositary for the U.S. Global Certificate or such Offshore
Global  Certificate,  as the case may be, and the  Company is unable to locate a
qualified  successor  depositary within 90 days of such notice or (ii) after the
occurrence  of an  Event  of  Default,  beneficial  owners  of the  U.S.  Global
Certificate or Offshore  Global  Certificates  evidencing  Fractional  Undivided
Interests  aggregating not less than a majority in interest in the Trust, by Act
of such Certificateholders  delivered to the Company and the Trustee, advise the
Company, the Trustee and the Depositary through its Clearing Agency Participants
in writing that the  continuation of a book-entry  system through the Depositary
is no longer in the best interests of the  Certificateholders,  then the Trustee
shall notify all owners of beneficial  interests in the U.S. Global  Certificate
or an Offshore Global Certificate,  through the Depositary, of the occurrence of
any such event and the availability of definitive Certificates.

                  (c) Any beneficial  interest in one of the Global Certificates
that is transferred to a Person who takes delivery in the form of an interest in
the other Global  Certificate will, upon such transfer,  cease to be an interest
in  such  Global  Certificate  and  become  an  interest  in  the  other  Global
Certificate  and,  accordingly,  will  thereafter  be  subject  to all  transfer
restrictions, if any, and other procedures applicable to beneficial interests in
such other Global Certificate for as long as it remains such an interest.

                  (d)      [Intentionally omitted.]

                  (e) In connection  with the transfer of the entire U.S. Global
Certificate or an entire  Offshore Global  Certificate to the beneficial  owners
thereof  pursuant  to  paragraph  (b) of this  Section  3.05,  such U.S.  Global
Certificate or Offshore Global Certificate,  as the case may be, shall be deemed
to be  surrendered  to the  Trustee  for  cancellation,  and the  Trustee  shall
execute,  authenticate  and deliver,  to each beneficial owner identified by the
Depositary  in  exchange  for  its  beneficial  interest  in  such  U.S.  Global
Certificate  or  Offshore  Global  Certificate,  as the  case  may be,  an equal
aggregate  principal amount of U.S.  Physical  Certificates or Offshore Physical
Certificates, as the case may be, of authorized denominations.

                  (f) Any U.S. Physical Certificate delivered in exchange for an
interest  in the U.S.  Global  Certificate  pursuant  to  paragraph  (b) of this
Section  3.05 shall,  except as otherwise  provided by paragraph  (f) of Section
3.06, bear the Private Placement Legend.

                  (g) Any Offshore  Physical  Certificate  delivered in exchange
for an interest in an Offshore Global  Certificate  pursuant to paragraph (b) of
this Section  shall,  except as otherwise  provided by paragraph  (f) of Section
3.06, bear the applicable  legend regarding  transfer  restrictions set forth in
Section 3.02(a).

                  (h) The registered  holder of the U.S.  Global  Certificate or
any Offshore Global  Certificate  may grant proxies and otherwise  authorize any
Person,  including  Agent  Members and Persons that may hold  interests  through
Agent Members,  to take any action which a Holder is entitled to take under this
Agreement or the Certificates.

                  Section 3.06.  Special Transfer Provisions.  The following provisions shall apply to
the Certificates:

                  (a) Transfers to Non-QIB  Institutional  Accredited Investors.
The following  provisions  shall apply with respect to the  registration  of any
proposed  transfer of a Certificate  to any  Institutional  Accredited  Investor
which is not a QIB (excluding transfers to or by Non-U.S. Persons):

                  (i)  The  Registrar   shall   register  the  transfer  of  any
         Certificate,   whether  or  not  such  Certificate  bears  the  Private
         Placement Legend,  if (x) the requested  transfer is at least two years
         after the later of the original issue date of the  Certificates and the
         last date on which  such  Certificate  was held by the  Company  or any
         affiliate  thereof or (y) the proposed  transferee has delivered to the
         Registrar  a letter  substantially  in the form of Exhibit D hereto and
         the aggregate principal amount of the Certificates being transferred is
         at least $100,000.

                  (ii) If the proposed  transferor is an Agent Member  holding a
         beneficial interest in the U.S. Global Certificate, upon receipt by the
         Registrar of (x) the documents,  if any,  required by paragraph (i) and
         (y)  instructions  given in accordance  with the  Depositary's  and the
         Registrar's  procedures,  the Registrar  shall reflect on its books and
         records the date of the transfer and a decrease in the principal amount
         of such U.S.  Global  Certificate  in an amount equal to the  principal
         amount of the beneficial interest in such U.S. Global Certificate to be
         transferred,  and the Company  shall  execute,  and the  Trustee  shall
         authenticate and deliver to the transferor or at its direction,  one or
         more U.S. Physical Certificates of like tenor and amount.

                  (b)      Transfers to QIBs.  The following provisions shall apply with respect to the
registration of any proposed transfer of a Certificate to a QIB (excluding Non-U.S. Persons):

                  (i) If the  Certificate  to be  transferred  consists  of U.S.
         Physical  Certificates or an interest in any Temporary  Offshore Global
         Certificate, the Registrar shall register the transfer if such transfer
         is being made by a proposed transferor who has checked the box provided
         for on the form of Certificate  stating,  or has otherwise  advised the
         Trustee and the  Registrar  in writing,  that the sale has been made in
         compliance  with the  provisions  of Rule 144A to a transferee  who has
         signed  the  certification  provided  for on the  form  of  Certificate
         stating,  or has  otherwise  advised the Trustee and the  Registrar  in
         writing,  that it is purchasing the  Certificate for its own account or
         an  account  with  respect  to  which  it  exercises  sole   investment
         discretion and that it, or the Person on whose behalf it is acting with
         respect to any such account,  is a QIB within the meaning of Rule 144A,
         and is aware that the sale to it is being made in reliance on Rule 144A
         and acknowledges  that it has received such  information  regarding the
         Trust and/or the Company as it has  requested  pursuant to Rule 144A or
         has  determined  not to request such  information  and that it is aware
         that the  transferor is relying upon its foregoing  representations  in
         order to claim the exemption from registration provided by Rule 144A.

                  (ii) Upon receipt by the Registrar of the  documents  referred
         to in clause (i) above and  instructions  given in accordance  with the
         Depositary's  and the Registrar's  procedures  therefor,  the Registrar
         shall reflect on its books and records the date of such transfer and an
         increase in the principal  amount of the U.S. Global  Certificate in an
         amount equal to the principal amount of the U.S. Physical  Certificates
         or interests in the Temporary Offshore Global Certificate,  as the case
         may be, being  transferred,  and the Trustee shall cancel such Physical
         Certificates  or decrease the amount of such Temporary  Offshore Global
         Certificate so transferred.

                  (c)      [Intentionally omitted.]

                  (d)  Transfers of Interests in the Permanent  Offshore  Global
Certificate or Offshore Physical Certificates.  The Registrar shall register any
transfer of interests in the Permanent  Offshore Global  Certificate or Offshore
Physical Certificates without requiring any additional certification.

                  (e)      Transfers to Non-U.S. Persons at Any Time.  The following provisions shall
apply with respect to any registration of any transfer of a Certificate to a Non-U.S. Person:

                  (i) Prior to the  Offshore  Certificates  Exchange  Date,  the
         Registrar  shall  register any proposed  transfer of a Certificate to a
         Non-U.S. Person upon receipt of a certificate substantially in the form
         set forth as Exhibit C hereto from the proposed transferor.

                  (ii) On and after the Offshore Certificates Exchange Date, the
         Registrar shall register any proposed  transfer to any Non-U.S.  Person
         if the Certificate to be transferred is a U.S. Physical  Certificate or
         an  interest  in  the  U.S.  Global  Certificate,  upon  receipt  of  a
         certificate  substantially  in the form of Exhibit C from the  proposed
         transferor.   The  Registrar   shall  promptly  send  a  copy  of  such
         certificate to the Company.

                  (iii) Upon receipt by the Registrar of (x) the  documents,  if
         any, required by paragraph (ii) and (y) instructions in accordance with
         the  Depositary's and the Registrar's  procedures,  the Registrar shall
         reflect  on its  books  and  records  the date of such  transfer  and a
         decrease in the principal amount of such U.S. Global  Certificate in an
         amount equal to the principal amount of the beneficial interest in such
         U.S. Global Certificate to be transferred,  and (B) upon receipt by the
         Registrar of instructions given in accordance with the Depositary's and
         the  Registrar's  procedures,  the Registrar shall reflect on its books
         and records the date and an  increase  in the  principal  amount of the
         Offshore Global  Certificate in an amount equal to the principal amount
         of the U.S. Physical Certificate or the U.S. Global Certificate, as the
         case may be,  to be  transferred,  and the  Trustee  shall  cancel  the
         Physical Certificate,  if any, so transferred or decrease the amount of
         such U.S. Global Certificate.

                  (f) Private Placement Legend.  Upon the transfer,  exchange or
replacement  of  Certificates  not  bearing the Private  Placement  Legend,  the
Registrar  shall  deliver  Certificates  that do not bear the Private  Placement
Legend. Upon the transfer,  exchange or replacement of Certificates  bearing the
Private  Placement  Legend,  the Registrar shall deliver only  Certificates that
bear  the  Private   Placement  Legend  unless  either  (i)  the   circumstances
contemplated  by  paragraph  (a)(i)(x)  or (e)(ii) of this Section 3.06 exist or
(ii) there is  delivered  to the  Registrar  an Opinion of Counsel to the effect
that neither such legend nor the related  restrictions  on transfer are required
in order to maintain compliance with the provisions of the Securities Act.

                  (g) General.  By its acceptance of any Certificate bearing the
Private  Placement  Legend,  each Holder of such a Certificate  acknowledges the
restrictions  on transfer of such  Certificate  set forth in this  Agreement and
agrees  that  it  will  transfer  such  Certificate  only  as  provided  in this
Agreement. The Registrar shall not register a transfer of any Certificate unless
such transfer complies with the restrictions on transfer of such Certificate set
forth in this Agreement.  In connection with any transfer of Certificates,  each
Certificateholder  agrees by its acceptance of the  Certificates  to furnish the
Registrar  or  the  Trustee  such   certifications,   legal  opinions  or  other
information  as either  of them may  reasonably  require  to  confirm  that such
transfer is being made  pursuant to an  exemption  from,  or a  transaction  not
subject to, the registration  requirements of the Securities Act;  provided that
neither the  Trustee  nor the  Registrar  shall be  required  to  determine  the
sufficiency of any such certifications, legal opinions or other information.

                  Until such time as no  Certificates  remain  Outstanding,  the
Registrar  shall  retain  copies  of all  letters,  notices  and  other  written
communications  received  pursuant to Section  3.05 or this  Section  3.06.  The
Trustee,  if not the Registrar at such time, shall have the right to inspect and
make copies of all such letters,  notices or other written communications at any
reasonable time upon the giving of reasonable written notice to the Registrar.

                  Section   3.07.   Mutilated,   Destroyed,   Lost   or   Stolen
Certificates.  If (a) any mutilated  Certificate is surrendered to the Registrar
or the Registrar receives evidence to its satisfaction of the destruction,  loss
or theft of any  Certificate and (b) there is delivered to the Registrar and the
Trustee such  security,  indemnity  or bond,  as may be required by them to save
each of them  harmless,  then,  in the absence of notice to the Registrar or the
Trustee that such  Certificate has been acquired by a bona fide  purchaser,  the
Trustee shall execute,  authenticate and deliver,  in exchange for or in lieu of
any such mutilated,  destroyed, lost or stolen Certificate, a new Certificate or
Certificates,  in  authorized  denominations  and of like  Fractional  Undivided
Interest and bearing a number not contemporaneously outstanding.

                  In connection with the issuance of any new  Certificate  under
this Section 3.07,  the Trustee shall require the payment of a sum sufficient to
cover any tax or other  governmental  charge  that may be  imposed  in  relation
thereto and any other  expenses  (including the fees and expenses of the Trustee
and the Registrar) connected therewith.

                  Any duplicate Certificate issued pursuant to this Section 3.07
shall constitute  conclusive  evidence of the appropriate  Fractional  Undivided
Interest in the Trust, as if originally issued,  whether or not the lost, stolen
or destroyed Certificate shall be found at any time.

                  The  provisions  of  this  Section  are  exclusive  and  shall
preclude (to the extent  lawful) all other  rights and remedies  with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Certificates.

                  Section 3.08. Persons Deemed Owners.  Prior to due presentment
of a Certificate for  registration of transfer,  the Trustee,  the Registrar and
any  Paying  Agent  may  treat  the  Person  in whose  name any  Certificate  is
registered  as the  owner  of such  Certificate  for the  purpose  of  receiving
distributions pursuant to Article IV and for all other purposes whatsoever,  and
none of the Trustee,  the Registrar or any Paying Agent shall be affected by any
notice to the contrary.

                  Section 3.09.  Cancellation.  All Certificates surrendered for
payment or transfer  or exchange  shall,  if  surrendered  to the Trustee or any
agent of the Trustee other than the Registrar, be delivered to the Registrar for
cancellation  and shall  promptly be cancelled by it. No  Certificates  shall be
authenticated  in  lieu of or in  exchange  for any  Certificates  cancelled  as
provided in this Section,  except as expressly permitted by this Agreement.  All
cancelled   Certificates  held  by  the  Registrar  shall  be  destroyed  and  a
certification of their destruction delivered to the Trustee.

                  Section  3.10.  Limitation  of  Liability  for  Payments.  All
payments and distributions  made to  Certificateholders  shall be made only from
the Trust Property and only to the extent that the Trustee shall have sufficient
income or proceeds  from the Trust  Property to make such payments in accordance
with the terms of Article IV of this Agreement.  Each Certificateholder,  by its
acceptance of a  Certificate,  agrees that it will look solely to the income and
proceeds from the Trust  Property to the extent  available for  distribution  to
such Certificateholder as provided in this Agreement.

                  Section  3.11.   Temporary   Certificates.   Until  definitive
Certificates are ready for delivery,  the Trustee shall  authenticate  temporary
Certificates.  Temporary  Certificates  shall  be  substantially  in the form of
definitive  Certificates but may have insertions,  substitutions,  omissions and
other  variations  determined to be  appropriate  by the officers  executing the
temporary  Certificates,  as  evidenced  by their  execution  of such  temporary
Certificates.  If  temporary  Certificates  are issued,  the Trustee  will cause
definitive  Certificates to be prepared without  unreasonable  delay.  After the
preparation  of definitive  Certificates,  the temporary  Certificates  shall be
exchangeable  for  definitive  Certificates  upon  surrender  of  the  temporary
Certificates at the office or agency of the Trustee  designated for such purpose
pursuant  to  Section  7.12,  without  charge  to  the  Certificateholder.  Upon
surrender  for  cancellation  of any one or  more  temporary  Certificates,  the
Trustee shall execute, authenticate and deliver in exchange therefor a like face
amount  of  definitive  Certificates  of  authorized  denominations.   Until  so
exchanged,  the  temporary  Certificates  shall be entitled to the same benefits
under this Agreement as definitive Certificates.


                                   ARTICLE IV

                          DISTRIBUTIONS; STATEMENTS TO
                               CERTIFICATEHOLDERS

                  Section  4.01.   Certificate   Account  and  Special  Payments
Account.  (a)  The  Trustee  shall  establish  and  maintain  on  behalf  of the
Certificateholders  a  Certificate  Account as one or more  non-interest-bearing
accounts.  The  Trustee  shall  hold the  Certificate  Account  in trust for the
benefit  of  the  Certificateholders,  and  shall  make  or  permit  withdrawals
therefrom  only as  provided  in this  Agreement.  On each day when a  Scheduled
Payment  is  made  to the  Trustee,  the  Trustee  upon  receipt  thereof  shall
immediately  deposit the  aggregate  amount of such  Scheduled  Payment into the
Certificate Account.

                  (b) The Trustee shall  establish and maintain on behalf of the
Certificateholders  a Special  Payments  Account as one or more accounts,  which
shall be  non-interest  bearing  except as provided in Section 4.04. The Trustee
shall  hold the  Special  Payments  Account  in  trust  for the  benefit  of the
Certificateholders  and  shall  make or  permit  withdrawals  therefrom  only as
provided in this  Agreement.  On each day when one or more Special  Payments are
made to the  Trustee,  the  Trustee,  upon receipt  thereof,  shall  immediately
deposit the aggregate  amount of such Special Payments into the Special Payments
Account.

                  (c) The Trustee  shall present to the Loan Trustee to which an
Equipment  Note  relates  such  Equipment  Note on the date of its stated  final
maturity or, in the case of any Equipment  Note which is to be redeemed in whole
pursuant to the relevant Indenture, on the applicable redemption date under such
Indenture.

                  Section  4.02.  Distributions  from  Certificate  Account  and
Special  Payments  Account.  (a) On each  Regular  Distribution  Date or as soon
thereafter as the Trustee has confirmed  receipt of the payment of the Scheduled
Payments due on such date, the Trustee shall  distribute out of the  Certificate
Account the entire amount deposited  therein pursuant to Section 4.01(a).  There
shall be so distributed to each  Certificateholder  of record on the Record Date
with  respect to such  Regular  Distribution  Date  (other  than as  provided in
Section  11.01  concerning  the  final  distribution)  by check  mailed  to such
Certificateholder,   at   the   address   appearing   in  the   Register,   such
Certificateholder's  pro rata share (based on the Fractional  Undivided Interest
in the  Trust  held  by  such  Certificateholder)  of the  total  amount  in the
Certificate Account, except that, with respect to Certificates registered on the
Record  Date in the  name of the  nominee  of the  Depositary  (initially,  such
nominee to be Cede & Co.), such  distribution  shall be made by wire transfer in
immediately available funds to the account designated by such nominee.

                  (b) On each  Special  Distribution  Date with  respect  to any
Special  Payment or as soon  thereafter as the Trustee has confirmed  receipt of
any Special  Payments,  the Trustee shall distribute out of the Special Payments
Account the entire amount of such Special Payment  deposited therein pursuant to
Section  4.01(b).  There shall be so  distributed to each  Certificateholder  of
record on the Record Date with respect to such Special  Distribution Date (other
than as provided in Section 11.01  concerning the final  distribution)  by check
mailed to such Certificateholder, at the address appearing in the Register, such
Certificateholder's  pro rata share (based on the aggregate Fractional Undivided
Interest in the Trust held by such Certificateholder) of the aggregate amount in
the Special Payments  Account on account of such Special  Payment,  except that,
with respect to  Certificates  registered  on the Record Date in the name of the
nominee of the  Depositary  (initially,  such  nominee  to be Cede & Co.),  such
distribution  shall be made by wire transfer in immediately  available  funds to
the account designated by such nominee.

                  (c) The Trustee  shall,  at the expense of the Company,  cause
notice of each  Special  Payment to be mailed to each  Certificateholder  at his
address as it appears in the Register. In the event of redemption, prepayment or
purchase of Equipment  Notes held in the Trust,  such notice shall be mailed not
less than 20 days  prior to the date any  Special  Payment  is  scheduled  to be
distributed.  In the case of any other  Special  Payments,  such notice shall be
mailed  as soon as  practicable  after the  Trustee  has  confirmed  that it has
received funds for such Special Payment,  stating the Special  Distribution Date
for such Special  Payment which shall occur not less than 20 days after the date
of such  notice and as soon as  practicable  thereafter.  Notices  mailed by the
Trustee shall set forth:

                  (i)      the Special Distribution Date and the Record Date therefor (except as
         otherwise provided in Section 11.01),

                  (ii) the amount of the  Special  Payment  for each $1,000 face
         amount  Certificate  (taking into account any payment to be made by the
         Company   pursuant  to  Section   2.01(b))   and  the  amount   thereof
         constituting principal, premium, if any, and interest,

                  (iii)    the reason for the Special Payment, and

                  (iv) if the  Special  Distribution  Date is the same date as a
         Regular Distribution Date, the total amount to be received on such date
         for each $1,000 face amount Certificate.

If the amount of premium,  if any,  payable upon the  redemption,  prepayment or
purchase  of an  Equipment  Note has not been  calculated  at the time  that the
Trustee mails notice of a Special Payment,  it shall be sufficient if the notice
sets forth the other  amounts to be  distributed  and  states  that any  premium
received will also be distributed.

                  If any redemption of the Equipment  Notes held in the Trust is
cancelled,  the Trustee, as soon as possible after learning thereof, shall cause
notice  thereof  to be mailed to each  Certificateholder  at its  address  as it
appears on the Register.

                  Section 4.03.  Statements to  Certificateholders.  (a) On each
Distribution   Date,  the  Trustee  will  include  with  each   distribution  to
Certificateholders  of a Scheduled  Payment or Special Payment,  as the case may
be, a statement setting forth the following  information (per $1,000 face amount
Certificate as to (i) and (ii) below):

                  (i)      the amount of such distribution allocable to principal and the amount
         allocable to premium, if any;

                  (ii)     the amount of such distribution allocable to interest; and

                  (iii) the Pool Balance and the Pool Factor.

                  With respect to the  Certificates  registered in the name of a
Clearing  Agency or its nominee,  on the record date prior to each  Distribution
Date,  the Trustee will request from the Clearing  Agency a securities  position
listing  setting  forth  the  names  of all  the  Clearing  Agency  Participants
reflected  on  the  Clearing   Agency's  books  as  holding   interests  in  the
Certificates  on such record date. On each  Distribution  Date, the Trustee will
mail to each such Clearing Agency Participant the statement  described above and
will make  available  additional  copies as  requested by such  Clearing  Agency
Participant for forwarding to holders of Certificates.

                  (b) Within a  reasonable  period of time after the end of each
calendar  year but not later than the latest date  permitted by law, the Trustee
shall  furnish to each Person who at any time during  such  calendar  year was a
Certificateholder  of  record  a  statement  containing  the sum of the  amounts
determined  pursuant to clauses (a)(i) and (a)(ii) with respect to the Trust for
such  calendar  year or, in the event  such  Person was a  Certificateholder  of
record during a portion of such calendar  year,  for the  applicable  portion of
such year,  and such other  items as are  readily  available  to the Trustee and
which a Certificateholder  shall reasonably request as necessary for the purpose
of such Certificateholder's  preparation of its federal income tax returns. With
respect  to  Certificates  registered  in the name of a  Clearing  Agency or its
nominee,  such  report and such other  items  shall be  prepared on the basis of
information  supplied to the Trustee by the  Clearing  Agency  Participants  and
shall be delivered by the Trustee to such  Clearing  Agency  Participants  to be
available for forwarding by such Clearing Agency Participants.

                  Section 4.04.  Investment of Special Payment Moneys. Any money
received  by the  Trustee  pursuant to Section  4.01(b)  representing  a Special
Payment  which  is  not  to  be  promptly   distributed  shall,  to  the  extent
practicable,  be invested in Permitted Investments by the Trustee as directed in
writing by the Company pending  distribution of such Special Payment pursuant to
Section 4.02. Any investment made pursuant to this Section 4.04 shall be in such
Permitted Investments having maturities not later than the date that such moneys
are required to be used to make the payment  required  under Section 4.02 on the
applicable  Special  Distribution  Date  and the  Trustee  shall  hold  any such
Permitted  Investments until maturity.  The Trustee shall have no liability with
respect to any  investment  made  pursuant to this Section  4.04,  other than by
reason of the willful  misconduct or  negligence of the Trustee.  All income and
earnings from such investments shall be distributed on such Special Distribution
Date as part of such Special Payment.


                                    ARTICLE V

                                   THE COMPANY

                  Section 5.01. Maintenance of Corporate Existence. The Company,
at its own cost and expense, will do or cause to be done all things necessary to
preserve and keep in full force and effect its corporate  existence,  rights and
franchises,   except  as  otherwise  specifically  permitted  in  Section  5.02;
provided,  however, that the Company shall not be required to preserve any right
or franchise if the Company shall determine that the preservation  thereof is no
longer desirable in the conduct of the business of the Company.

                  Section 5.02.  Consolidation, Merger, Etc.  The Company shall not consolidate with or
merge into any other corporation or convey, transfer or lease substantially all of its assets as an
entirety to any Person unless:

                  (a) the corporation formed by such consolidation or into which
         the  Company  is merged or the Person  which  acquires  by  conveyance,
         transfer or lease  substantially all of the assets of the Company as an
         entirety shall be organized and validly  existing under the laws of the
         United  States of  America  or any state  thereof  or the  District  of
         Columbia  and a "citizen  of the United  States" (as defined in Section
         40102(a)(15)  of Title 49 of the  United  States  Code)  holding an air
         carrier   operating   certificate   issued  by  the  Federal   Aviation
         Administration,  or any successor agency thereto (the "FAA"),  pursuant
         to  Chapter  447 of Title  49,  United  States  Code,  authorizing  the
         operation in air  transportation  of aircraft capable of carrying 10 or
         more  individuals or 6,000 pounds or more of cargo pursuant to Part 121
         of the FAA's regulations (14 CFR Part 121);

                  (b) the corporation formed by such consolidation or into which
         the  Company  is merged or the Person  which  acquires  by  conveyance,
         transfer or lease  substantially all of the assets of the Company as an
         entirety  shall  execute and deliver to the Trustee a duly  authorized,
         valid,  binding  and  enforceable   agreement  in  form  and  substance
         reasonably satisfactory to the Trustee containing an assumption by such
         successor corporation or Person of the due and punctual performance and
         observance of each covenant and condition of this Agreement,  the Other
         Pass Through Trust Agreements, the Financing Agreements, and each other
         Financing Document to be performed or observed by the Company;

                  (c) immediately  after giving effect to such  transaction,  no
         Event of Default or event which is, or after notice or passage of time,
         or both,  would be, such an Event of Default shall have occurred and be
         continuing; and

                  (d)  the  Company  shall  have  delivered  to the  Trustee  an
         Officer's  Certificate  of the Company and an Opinion of Counsel of the
         Company reasonably  satisfactory to the Trustee, each stating that such
         consolidation, merger, conveyance, transfer or lease and the assumption
         agreement  mentioned  in clause (b) above comply with this Section 5.02
         and that all conditions  precedent herein provided for relating to such
         transaction have been complied with.

                  Upon any consolidation or merger, or any conveyance,  transfer
or lease of  substantially  all of the assets of the  Company as an  entirety in
accordance with this Section 5.02, the successor corporation or Person formed by
such  consolidation  or into  which  the  Company  is  merged  or to which  such
conveyance,  transfer or lease is made shall succeed to, and be substituted for,
and may exercise every right and power of, the Company under this Agreement with
the same effect as if such successor corporation or Person had been named as the
Company herein.  No such conveyance,  transfer or lease of substantially  all of
the assets of the Company as an entirety  shall have the effect of releasing the
Company or any  successor  corporation  or Person which shall  theretofore  have
become such in the manner  prescribed in this Section 5.02 from its liability in
respect of this Agreement or any Financing Document to which it is a party.


                                   ARTICLE VI

                                     DEFAULT

                  Section 6.01.  Events of Default.  (a)  Exercise of Remedies.  Upon the occurrence and
during the continuation of any Indenture Default under any Indenture, the Trustee may, to the extent it
is the Controlling Party at such time, direct the exercise of remedies as provided in the Intercreditor
Agreement.

                  (b) Purchase Rights of  Certificateholders.  (i) By acceptance
of its  Certificate,  each  Certificateholder  agrees that at any time after the
occurrence  and during the  continuation  of a  Triggering  Event:  each Class B
Certificateholder  shall have the right to purchase  all, but not less than all,
of the Certificates  upon ten days' written notice to the Trustee and each other
Class B Certificateholder, provided that (A) if prior to the end of such ten-day
period any other Class B  Certificateholder  notifies  such  purchasing  Class B
Certificateholder that such other Class B Certificateholder wants to participate
in such purchase,  then such other Class B  Certificateholder  may join with the
purchasing Class B Certificateholder  to purchase all, but not less than all, of
the  Certificates  pro rata based on the  Fractional  Undivided  Interest in the
Class B Trust  held by each such Class B  Certificateholder  and (B) if prior to
the end of such  ten-day  period any other  Class B  Certificateholder  fails to
notify  the  purchasing  Class  B  Certificateholder   of  such  other  Class  B
Certificateholder's  desire to participate  in such a purchase,  then such other
Class B  Certificateholder  shall lose its right to  purchase  the  Certificates
pursuant to this Section 6.01(b).

                  (ii) By acceptance of its Certificate,  each Certificateholder
agrees that at any time after the  occurrence and during the  continuation  of a
Triggering  Event:  each Class C  Certificateholder  shall have the right (which
shall not expire upon any  purchase of the  Certificates  pursuant to clause (i)
above) to purchase all, but not less than all, of the Certificates and the Class
B Certificates upon ten days' written notice to the Trustee, the Class B Trustee
and each other Class C Certificateholder,  provided that (A) if prior to the end
of such  ten-day  period  any  other  Class C  Certificateholder  notifies  such
purchasing Class C  Certificateholder  that such other Class C Certificateholder
wants to participate in such purchase, then such other Class C Certificateholder
may join with the purchasing Class C Certificateholder  to purchase all, but not
less than all, of the  Certificates  and the Class B Certificates pro rata based
on the  Fractional  Undivided  Interest  in the Class C Trust  held by each such
Class C Certificateholder and (B) if prior to the end of such ten day period any
other  Class  C  Certificateholder  fails  to  notify  the  purchasing  Class  C
Certificateholder   of  such  other  Class  C   Certificateholder's   desire  to
participate in such a purchase,  then such other Class C Certificateholder shall
lose  its  right to  purchase  the  Certificates  and the  Class B  Certificates
pursuant to this Section 6.01(b).

                  (iii) By acceptance of its Certificate, each Certificateholder
agrees that at any time after the  occurrence and during the  continuation  of a
Triggering  Event:  each Class D  Certificateholder  shall have the right (which
shall not expire upon any  purchase of the  Certificates  pursuant to clause (i)
above and the Certificates and the Class B Certificates  pursuant to clause (ii)
above) to purchase all, but not less than all, of the Certificates,  the Class B
Certificates  and the Class C Certificates  upon ten days' written notice to the
Trustee,  the  Class B  Trustee,  the  Class C Trustee  and each  other  Class D
Certificateholder,  provided that (A) if prior to the end of such ten-day period
any  other  Class  D   Certificateholder   notifies  such  purchasing   Class  D
Certificateholder that such other Class D Certificateholder wants to participate
in such purchase,  then such other Class D  Certificateholder  may join with the
purchasing Class D Certificateholder  to purchase all, but not less than all, of
the Certificates, the Class B Certificates and the Class C Certificates pro rata
based on the  Fractional  Undivided  Interest  in the Class D Trust held by each
such  Class D  Certificateholder  and (B) if  prior  to the end of such  ten day
period any other Class D Certificateholder  fails to notify the purchasing Class
D  Certificateholder  of  such  other  Class  D  Certificateholder's  desire  to
participate in such a purchase,  then such other Class D Certificateholder shall
lose its right to purchase the  Certificates,  the Class B Certificates  and the
Class C Certificates pursuant to this Section 6.01(b).

                  The purchase price with respect to the  Certificates  shall be
equal to the Pool Balance of the Certificates,  together with accrued and unpaid
interest thereon to the date of such purchase,  without  premium,  but including
any other  amounts  then due and  payable to the  Certificateholders  under this
Agreement,  the Intercreditor Agreement or any other Financing Document or on or
in respect of the  Certificates;  provided,  however,  that no such  purchase of
Certificates  shall be  effective  unless  the  purchaser  shall  certify to the
Trustee that contemporaneously with such purchase, such purchaser is purchasing,
pursuant  to the  terms of this  Agreement  and the  Other  Pass  Through  Trust
Agreements,  the  Certificates,  the  Class  B  Certificates  and  the  Class  C
Certificates  which are senior to the Class of  Certificates  (as defined in the
Intercreditor  Agreement) held by such  purchaser.  Each payment of the purchase
price of the Certificates shall be made to an account or accounts  designated by
the  Trustee  and each  such  purchase  shall be  subject  to the  terms of this
Section. Each Certificateholder agrees by its acceptance of its Certificate that
it will,  subject  to  Section  3.04  hereof,  upon  payment  from such  Class B
Certificateholder(s),     Class    C    Certificateholder(s)    or    Class    D
Certificateholder(s)  of the purchase  price set forth in the first  sentence of
this  paragraph,  forthwith sell,  assign,  transfer and convey to the purchaser
thereof (without recourse, representation or warranty of any kind except for its
own  acts),  all  of  the  right,   title,   interest  and  obligation  of  such
Certificateholder in, this Agreement, the Intercreditor Agreement, the Liquidity
Facility,   the  Financing   Documents  and  all   Certificates   held  by  such
Certificateholder  (excluding  all right,  title and  interest  under any of the
foregoing  to the extent  such right,  title or  interest is with  respect to an
obligation  not then due and payable as respects any action or inaction or state
of affairs  occurring  prior to such sale) and the purchaser shall assume all of
such  Certificateholder's  obligations  under this Agreement,  the Intercreditor
Agreement,  the Liquidity Facility and the Financing Documents. The Certificates
will be deemed to be purchased on the date payment of the purchase price is made
notwithstanding   the   failure  of  the   Certificateholders   to  deliver  any
Certificates  (whether  in the  form  of  Physical  Certificates  or  beneficial
interests in Global Certificates) and, upon such a purchase, (i) the only rights
of the  Certificateholders  will be to deliver the Certificates to the purchaser
and receive the purchase  price for the  Certificates  and (ii) if the purchaser
shall so request, such  Certificateholder will comply with all the provisions of
Section 3.04 hereof to enable new  Certificates to be issued to the purchaser in
such  denominations as it shall request.  All charges and expenses in connection
with the issuance of any such new  Certificates  shall be borne by the purchaser
thereof.

                  As   used    in    this    Section    6.01(b),    the    terms
"Certificateholder",     "Class",    "Class    B    Certificate",    "Class    B
Certificateholder",  "Class B Trust", "Class B Trustee",  "Class C Certificate",
"Class C  Certificateholder",  "Class C  Trust",  "Class  C  Trustee",  "Class D
Certificate",  "Class  D  Certificateholder",  "Class  D  Trust"  and  "Class  D
Trustee",  shall  have the  respective  meanings  assigned  to such terms in the
Intercreditor Agreement.

                  Section 6.02.  Incidents of Sale of Equipment Notes.  Upon any
sale of all or any part of the  Equipment  Notes made either  under the power of
sale  given  under this  Agreement  or  otherwise  for the  enforcement  of this
Agreement, the following shall be applicable:

                  (1)  Certificateholders  and  Trustee May  Purchase  Equipment
         Notes.  Any  Certificateholder,  the Trustee in its  individual  or any
         other  capacity or any other Person may bid for and purchase any of the
         Equipment  Notes, and upon compliance with the terms of sale, may hold,
         retain,  possess  and  dispose  of such  Equipment  Notes in their  own
         absolute right without further accountability.

                  (2) Receipt of Trustee Shall Discharge Purchaser.  The receipt
         of the Trustee or of the officer making such sale shall be a sufficient
         discharge to any purchaser for his purchase  money,  and,  after paying
         such purchase money and receiving  such receipt,  such purchaser or its
         personal  representative  or assigns shall not be obliged to see to the
         application of such purchase money, or be in any way answerable for any
         loss, misapplication or non-application thereof.

                  (3)  Application  of Moneys  Received  upon  Sale.  Any moneys
         received by the Trustee from the  Subordination  Agent  pursuant to the
         Intercreditor  Agreement  upon any sale made either  under the power of
         sale given by this  Agreement or otherwise for the  enforcement of this
         Agreement shall be applied as provided in Section 4.02.

                  Section  6.03.  Judicial  Proceedings  Instituted  by Trustee;
Trustee  May Bring  Suit.  If there  shall be a failure  to make  payment of the
principal of,  premium,  if any, or interest on any Equipment  Note, or if there
shall be any failure to pay Rent (as defined in the  relevant  Lease)  under any
Lease when due and payable,  then the Trustee, in its own name and as trustee of
an express trust, as holder of such Equipment  Notes, to the extent permitted by
and in  accordance  with  the  terms  of the  Intercreditor  Agreement  and  the
Financing  Documents  (subject to the rights of the applicable  Owner Trustee or
Owner  Participant  to cure any such failure in accordance  with Section 8.03 of
the  applicable  Indenture),  shall be entitled and  empowered to institute  any
suits, actions or proceedings at law, in equity or otherwise, for the collection
of the sums so due and  unpaid on such  Equipment  Notes or under such Lease and
may  prosecute  any such claim or  proceeding  to judgment or final  decree with
respect to the whole amount of any such sums so due and unpaid.

                  Section  6.04.  Control  by  Certificateholders.   Subject  to
Section 6.03 and the Intercreditor  Agreement,  the  Certificateholders  holding
Certificates evidencing Fractional Undivided Interests aggregating not less than
a majority  in  interest  in the Trust  shall have the right to direct the time,
method and place of conducting any  proceeding  for any remedy  available to the
Trustee with respect to the Trust or pursuant to the terms of the  Intercreditor
Agreement,  or exercising any trust or power conferred on the Trustee under this
Agreement or the Intercreditor Agreement,  including any right of the Trustee as
Controlling  Party  under  the  Intercreditor  Agreement  or as  holder  of  the
Equipment Notes, provided that

                  (1) such  Direction  shall not be in conflict with any rule of
         law or with this  Agreement  and  would  not  involve  the  Trustee  in
         personal liability or expense,

                  (2) the  Trustee  shall  not  determine  that  the  action  so
         directed would be unjustly  prejudicial to the  Certificateholders  not
         taking part in such Direction, and

                  (3) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such Direction.

                  Section  6.05.  Waiver  of  Past  Defaults.   Subject  to  the
Intercreditor Agreement, the Certificateholders  holding Certificates evidencing
Fractional Undivided Interests  aggregating not less than a majority in interest
in the Trust (i) may on behalf of all of the  Certificateholders  waive any past
Event of Default  hereunder and its  consequences  or (ii) if the Trustee is the
Controlling  Party,  may direct the  Trustee to  instruct  the  applicable  Loan
Trustee  to  waive,  any past  Indenture  Default  under any  Indenture  and its
consequences,  and thereby annul any Direction given by such  Certificateholders
or the Trustee to such Loan Trustee with respect thereto, except a default:

                  (1) in the deposit of any Scheduled Payment or Special Payment
         under Section 4.01 or in the  distribution of any payment under Section
         4.02 on the Certificates, or

                  (2)      in the payment of the principal of (premium, if any) or interest on the
         Equipment Notes, or

                  (3) in respect of a covenant or  provision  hereof which under
         Article IX or X cannot be  modified  or amended  without the consent of
         each  Certificateholder  holding an  Outstanding  Certificate  affected
         thereby.

                  Upon any such waiver,  such default  shall cease to exist with
respect to the Certificates and any Event of Default arising  therefrom shall be
deemed to have  been  cured for every  purpose  and any  direction  given by the
Trustee on behalf of the  Certificateholders  to the relevant Loan Trustee shall
be  annulled  with  respect  thereto;  but no such  waiver  shall  extend to any
subsequent or other  default or Event of Default or impair any right  consequent
thereon. Upon any such waiver, the Trustee shall vote the Equipment Notes issued
under the relevant Indenture to waive the corresponding Indenture Default.

                  Section 6.06. Right of  Certificateholders to Receive Payments
Not to Be Impaired.  Anything in this Agreement to the contrary notwithstanding,
including,  without  limitation,   Section  6.07  hereof,  but  subject  to  the
Intercreditor   Agreement,   the  right  of  any  Certificateholder  to  receive
distributions  of  payments  required  pursuant  to Section  4.02  hereof on the
Certificates  when due, or to  institute  suit for the  enforcement  of any such
payment  on or  after  the  applicable  Regular  Distribution  Date  or  Special
Distribution Date, shall not be impaired or affected without the consent of such
Certificateholder.

                  Section  6.07.  Certificateholders  May Not Bring Suit  Except
Under  Certain  Conditions.  A  Certificateholder  shall  not have the  right to
institute any suit,  action or proceeding at law or in equity or otherwise  with
respect  to  this  Agreement,  for  the  appointment  of a  receiver  or for the
enforcement of any other remedy under this Agreement, unless:

                  (1) such Certificateholder previously shall have given written
         notice to the Trustee of a continuing Event of Default;

                  (2)   Certificateholders   holding   Certificates   evidencing
         Fractional  Undivided  Interests  aggregating  not less than 25% of the
         Trust shall have  requested  the Trustee in writing to  institute  such
         action,  suit or  proceeding  and shall  have  offered  to the  Trustee
         indemnity as provided in Section 7.03(e);

                  (3) the Trustee  shall have  refused or neglected to institute
         such an action,  suit or  proceeding  for 60 days after receipt of such
         notice, request and offer of indemnity; and

                  (4) no direction  inconsistent with such written request shall
         have  been  given  to  the  Trustee   during  such  60-day   period  by
         Certificateholders holding Certificates evidencing Fractional Undivided
         Interests  aggregating  not less than a  majority  in  interest  in the
         Trust.

                  It is  understood  and  intended  that  no one or  more of the
Certificateholders  shall have any right in any manner  whatsoever  hereunder or
under the  Certificates  to (i) surrender,  impair,  waive,  affect,  disturb or
prejudice any property in the Trust Property or the lien of any Indenture on any
property subject thereto, or the rights of the Certificateholders or the holders
of the  Equipment  Notes,  (ii)  obtain  or  seek  to  obtain  priority  over or
preference with respect to any other such Certificateholder or (iii) enforce any
right under this  Agreement,  except in the manner  herein  provided and for the
equal, ratable and common benefit of all the  Certificateholders  subject to the
provisions of this Agreement.

                  Section  6.08.   Remedies   Cumulative.   Every  remedy  given
hereunder  to the  Trustee  or to any of  the  Certificateholders  shall  not be
exclusive  of any other  remedy or  remedies,  and every  such  remedy  shall be
cumulative  and in addition  to every other  remedy  given  hereunder  or now or
hereafter given by statute, law, equity or otherwise.

                  Section  6.09.  Undertaking  for  Costs.  In any  suit for the
enforcement of any right or remedy under this Agreement,  or in any suit against
the Trustee for any action taken,  suffered or omitted by it as Trustee, a court
may require any party  litigant in such suit to file an  undertaking  to pay the
costs of such suit, and may assess costs against any such party litigant, in the
manner and to the extent  provided in the Trust  Indenture  Act;  provided  that
neither  this Section nor the Trust  Indenture  Act shall be deemed to authorize
any court to require such an  undertaking  or to make such an  assessment in any
suit instituted by the Company or the Guarantor.


                                   ARTICLE VII

                                   THE TRUSTEE

                  Section 7.01. Certain Duties and Responsibilities.  (a) Except
during the continuance of an Event of Default, the Trustee undertakes to perform
such  duties as are  specifically  set forth in this  Agreement,  and no implied
covenants or obligations shall be read into this Agreement against the Trustee.

                  (b)  In  case  an  Event  of  Default  has   occurred  and  is
continuing,  the Trustee shall  exercise such of the rights and powers vested in
it by this  Agreement,  and use the  same  degree  of care  and  skill  in their
exercise,  as a prudent man would exercise or use under the circumstances in the
conduct of its own affairs.

                  (c) No  provision  of this  Agreement  shall be  construed  to
relieve  the  Trustee  from  liability  for its own  negligent  action,  its own
negligent failure to act, or its own wilful misconduct, except that

                  (1)      this Subsection shall not be construed to limit the effect of Subsection (a)
         of this Section; and

                  (2) the Trustee  shall not be liable for any error of judgment
         made in good faith by a Responsible  Officer of the Trustee,  unless it
         shall be proved that the  Trustee was  negligent  in  ascertaining  the
         pertinent facts.

                  (d)  Whether  or  not  herein  expressly  so  provided,  every
provision  of this Trust  Agreement  relating  to the conduct or  affecting  the
liability  of or  affording  protection  to the Trustee  shall be subject to the
provisions of this Section.

                  Section 7.02.  Notice of Defaults.  As promptly as practicable
after,  and in any event within 90 days after, the occurrence of any default (as
such term is defined below)  hereunder  known to the Trustee,  the Trustee shall
transmit by mail to the Company, the Owner Trustees, the Owner Participants, the
Loan Trustees and the  Certificateholders  in accordance  with Section 313(c) of
the Trust Indenture Act, notice of such default  hereunder known to the Trustee,
unless such default shall have been cured or waived;  provided,  however,  that,
except in the case of a default in the  payment of the  principal,  premium,  if
any, or interest on any  Equipment  Note,  the  Trustee  shall be  protected  in
withholding such notice if and so long as the board of directors,  the executive
committee or a trust committee of directors and/or  Responsible  Officers of the
Trustee in good faith  determine  that the  withholding of such notice is in the
interests of the  Certificateholders.  For the purpose of this Section, the term
"default"  means  any event  that is,  or after  notice or lapse of time or both
would become, an Event of Default.

                  Section 7.03.  Certain Rights of Trustee.  Subject to the provisions of Section 315 of
the Trust Indenture Act:

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

                  (b)      any request or direction of the Company mentioned herein shall be sufficiently
         evidenced by a Request;

                  (c) whenever in the  administration  of this  Agreement or the
         Intercreditor  Agreement  the Trustee  shall deem it  desirable  that a
         matter be proved or established prior to taking,  suffering or omitting
         any action  hereunder,  the Trustee  (unless  other  evidence be herein
         specifically  prescribed) may, in the absence of bad faith on its part,
         rely upon an Officer's Certificate of the Company, any Owner Trustee or
         any Loan Trustee;

                  (d) the  Trustee may  consult  with  counsel and the advice of
         such  counsel  or any  Opinion of  Counsel  shall be full and  complete
         authorization  and protection in respect of any action taken,  suffered
         or omitted by it hereunder in good faith and in reliance thereon;

                  (e) the Trustee  shall be under no  obligation to exercise any
         of  the  rights  or  powers  vested  in it by  this  Agreement  or  the
         Intercreditor  Agreement  at the  request  or  direction  of any of the
         Certificateholders  pursuant  to this  Agreement  or the  Intercreditor
         Agreement,  unless such  Certificateholders  shall have  offered to the
         Trustee reasonable security or indemnity against the cost, expenses and
         liabilities  which  might be  incurred  by it in  compliance  with such
         request or direction;

                  (f) the Trustee  shall not be bound to make any  investigation
         into the  facts  or  matters  stated  in any  resolution,  certificate,
         statement,  instrument,  opinion,  report, notice, request,  direction,
         consent, order, bond, debenture or other paper or document;

                  (g) the Trustee may execute any of the trusts or powers  under
         this  Agreement  or the  Intercreditor  Agreement or perform any duties
         under this Agreement or the Intercreditor  Agreement 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  with due care by it under this Agreement or the
         Intercreditor Agreement;

                  (h) the Trustee shall not be liable with respect to any action
         taken or omitted to be taken by it in good faith in accordance with the
         direction of the  Certificateholders  holding  Certificates  evidencing
         Fractional Undivided Interests  aggregating not less than a majority in
         interest  in the  Trust  relating  to the  time,  method  and  place of
         conducting any proceeding for any remedy  available to the Trustee,  or
         exercising any trust or power  conferred  upon the Trustee,  under this
         Agreement or the Intercreditor Agreement; and

                  (i) the  Trustee  shall not be  required to expend or risk its
         own funds in the performance of any of its duties under this Agreement,
         or in the  exercise  of any of its rights or  powers,  if it shall have
         reasonable  grounds  for  believing  that  repayment  of such  funds or
         adequate indemnity against such risk is not reasonably assured to it.

                  Section  7.04.  Not  Responsible  for  Recitals or Issuance of
Certificates. The recitals contained herein and in the Certificates,  except the
certificates  of  authentication,  shall not be taken as the  statements  of the
Trustee,  and the  Trustee  assumes  no  responsibility  for their  correctness.
Subject to Section 7.15, the Trustee makes no representations as to the validity
or sufficiency of this Agreement,  any Financing Agreement, any Equipment Notes,
the Certificates or any other Financing Document, except that the Trustee hereby
represents  and warrants  that this  Agreement has been,  and the  Intercreditor
Agreement,  each Financing  Agreement and each  Certificate  will be,  executed,
authenticated  and  delivered by one of its officers who is duly  authorized  to
execute, authenticate and deliver such document on its behalf.

                  Section 7.05. May Hold Certificates.  The Trustee,  any Paying
Agent,  Registrar  or any of  their  Affiliates  or any  other  agent  in  their
respective  individual or any other  capacity may become the owner or pledgee of
Certificates and, subject to Sections 310(b) and 311 of the Trust Indenture Act,
if  applicable,  may otherwise deal with the Company,  the Guarantor,  the Owner
Trustees or the Loan  Trustees with the same rights it would have if it were not
Trustee, Paying Agent, Registrar or such other agent.

                  Section 7.06.  Money Held in Trust.  Money held by the Trustee
or the Paying Agent in trust  hereunder need not be segregated  from other funds
except to the extent  required  herein or by law and neither the Trustee nor the
Paying Agent shall have any  liability  for interest upon any such moneys except
as provided for herein.

                  Section 7.07.  Compensation and Reimbursement.  The Company agrees:

                  (1) to pay, or cause to be paid,  to the Trustee  from time to
         time  compensation (as set out in a separate fee agreement  between the
         Trustee and the  Company)  for all  services  rendered by it  hereunder
         (which  compensation  shall not be limited by any  provision  of law in
         regard to the compensation of a trustee of an express trust);

                  (2)  except  as  otherwise   expressly   provided  herein,  to
         reimburse, or cause to be reimbursed,  the Trustee upon its request for
         all  reasonable  out-of-pocket  expenses,  disbursements  and  advances
         incurred or made by the Trustee in  accordance  with any  provision  of
         this Agreement or the Intercreditor Agreement (including the reasonable
         compensation  and the  expenses  and  disbursements  of its  agents and
         counsel),  except any such expense,  disbursement  or advance as may be
         attributable to its negligence,  willful  misconduct or bad faith or as
         may be incurred due to the Trustee's breach of its  representations and
         warranties set forth in Section 7.15;

                  (3) to indemnify, or cause to be indemnified, the Trustee for,
         and to hold it harmless against,  any loss, liability or expense (other
         than for or with  respect  to any  tax)  incurred  without  negligence,
         willful  misconduct  or bad faith,  on its part,  arising  out of or in
         connection  with  the  acceptance  or  administration  of  this  Trust,
         including the costs and expenses of defending  itself against any claim
         or liability in connection  with the exercise or  performance of any of
         its powers or duties hereunder,  except for any such loss, liability or
         expense   incurred   by   reason  of  the   Trustee's   breach  of  its
         representations  and  warranties set forth in Section 7.15. The Trustee
         shall  notify the Company and the  Guarantor  promptly of any claim for
         which it may seek  indemnity.  The Company  and/or the Guarantor  shall
         defend the claim and the Trustee  shall  cooperate in the defense.  The
         Trustee may have  separate  counsel with the consent of the Company and
         the Guarantor and the Company and the Guarantor will pay the reasonable
         fees  and  expenses  of  such  counsel.  Neither  the  Company  nor the
         Guarantor need pay for any settlement made without its consent; and

                  (4) to  indemnify,  or cause to be  indemnified,  the Trustee,
         solely  in its  individual  capacity,  for,  and to  hold  it  harmless
         against,  any tax  (except  to the extent  the  Trustee  is  reimbursed
         therefor   pursuant   to  the   next   paragraph,   provided   that  no
         indemnification shall be available with respect to any tax attributable
         to the Trustee's  compensation  for serving as such)  incurred  without
         negligence,  willful  misconduct or bad faith, on its part, arising out
         of or in  connection  with the  acceptance  or  administration  of this
         Trust,  including  any costs and expenses  incurred in  contesting  the
         imposition of any such tax. The Trustee,  in its  individual  capacity,
         shall  notify the Company and the  Guarantor  promptly of any claim for
         any tax for which it may seek  indemnity.  The Trustee shall permit the
         Company and the Guarantor to contest the imposition of such tax and the
         Trustee,  in its individual  capacity,  shall cooperate in the defense.
         The Trustee, in its individual capacity, may have separate counsel with
         the consent of the Company  and the  Guarantor  and the Company and the
         Guarantor  will pay the  reasonable  fees and expenses of such counsel.
         Neither the Company nor the  Guarantor  need pay for any taxes paid, in
         settlement or otherwise, without its consent.

                  The Trustee shall be entitled to reimbursement from, and shall
have a lien  prior to the  Certificates  upon,  the Trust  Property  for any tax
incurred  without  negligence,  bad faith or  willful  misconduct,  on its part,
arising out of or in connection  with the acceptance or  administration  of such
Trust (other than any tax attributable to the Trustee's compensation for serving
as such), including any costs and expenses incurred in contesting the imposition
of any such tax. If the  Trustee  reimburses  itself from the Trust  Property of
such Trust for any such tax, it will mail a brief report  within 30 days setting
forth the  circumstances  thereof to all  Certificateholders  as their names and
addresses appear in the Register.

                  Section 7.08. Corporate Trustee Required;  Eligibility.  There
shall at all times be a Trustee  hereunder  which  shall be eligible to act as a
trustee  under  Section  310(a) of the  Trust  Indenture  Act and  shall  have a
combined capital and surplus of at least  $75,000,000 (or a combined capital and
surplus in excess of $5,000,000  and the  obligations  of which,  whether now in
existence or hereafter incurred,  are fully and unconditionally  guaranteed by a
corporation  organized and doing  business  under the laws of the United States,
any state or  territory  thereof or of the  District  of  Columbia  and having a
combined  capital  and  surplus of at least  $75,000,000).  If such  corporation
publishes  reports of  conditions at least  annually,  pursuant to law or to the
requirements of federal, state,  territorial or District of Columbia supervising
or examining authority, then for the purposes of this Section 7.08, the combined
capital  and  surplus  of such  corporation  shall be deemed to be its  combined
capital  and  surplus as set forth in its most recent  report of  conditions  so
published.

                  In case at any time the Trustee  shall cease to be eligible in
accordance  with the  provisions  of this  Section  7.08 to act as Trustee,  the
Trustee  shall resign  immediately  as Trustee in the manner and with the effect
specified in Section 7.09.

                  Section  7.09.   Resignation   and  Removal;   Appointment  of
Successor.  (a) No resignation or removal of the Trustee and no appointment of a
successor  Trustee  pursuant to this Article  shall become  effective  until the
acceptance of appointment by the successor Trustee under Section 7.10.

                  (b) The  Trustee  may  resign at any time as trustee by giving
prior written notice thereof to the Company,  the Authorized  Agents,  the Owner
Trustees and the Loan  Trustees.  If an  instrument of acceptance by a successor
Trustee shall not have been delivered to the Company, the Authorized Agents, the
Owner  Trustees,  the Loan  Trustees  and the  Trustee  within 30 days after the
giving of such notice of  resignation,  the  resigning  Trustee may petition any
court of competent jurisdiction for the appointment of a successor Trustee.

                  (c)  The  Trustee  may be  removed  at any  time by Act of the
Certificateholders   holding   Certificates   evidencing   Fractional  Undivided
Interests  aggregating  not  less  than a  majority  in  interest  in the  Trust
delivered to the Trustee, the Company, the Owner Trustees and the Loan Trustees.

                  (d)      If at any time:

                  (1) the Trustee  shall fail to comply with  Section 310 of the
         Trust Indenture Act, if applicable,  after written request  therefor by
         the  Company  or by any  Certificateholder  who  has  been a bona  fide
         Certificateholder for at least six months; or

                  (2) the Trustee shall cease to be eligible  under Section 7.08
         and shall fail to resign after written request  therefor by the Company
         or by any such Certificateholder; or

                  (3) 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
         rehabilitation, conservation or liquidation;

then,  in any  case,  (i) the  Company  may  remove  the  Trustee  or  (ii)  any
Certificateholder  who has been a bona fide  Certificateholder  for at least six
months may, on behalf of itself and all others similarly situated,  petition any
court  of  competent  jurisdiction  for  the  removal  of the  Trustee  and  the
appointment of a successor Trustee.

                  (e) If a  Responsible  Officer  of the  Trustee  shall  obtain
actual knowledge of an Avoidable Tax which has been or is likely to be asserted,
the Trustee shall promptly notify the Company and shall,  within 30 days of such
notification,  resign  hereunder  unless  within such 30-day  period the Trustee
shall have  received  notice that the  Company  has agreed to pay such tax.  The
Company shall promptly appoint a successor Trustee in a jurisdiction where there
are no Avoidable Taxes.

                  (f)  If  the  Trustee  shall  resign,  be  removed  or  become
incapable of acting as trustee or if a vacancy  shall occur in the office of the
Trustee for any cause, the Company shall promptly  appoint a successor  Trustee.
If, within 90 days after such  resignation,  removal or  incapability,  or other
occurrence of such vacancy, a successor Trustee shall be appointed by Act of the
Certificateholders   holding   Certificates   evidencing   Fractional  Undivided
Interests  aggregating  not  less  than a  majority  in  interest  in the  Trust
delivered to the Company, the Owner Trustees, the Loan Trustees and the retiring
Trustee, and the Company approves such appointment,  which approval shall not be
unreasonably withheld,  then the successor Trustee so appointed shall, forthwith
upon its  acceptance  of such  appointment,  become the  successor  Trustee  and
supersede the successor  Trustee  appointed as provided  above.  If no successor
Trustee shall have been so appointed as provided above and accepted  appointment
in the manner hereinafter  provided,  any  Certificateholder who has been a bona
fide Certificateholder for at least six months may, on behalf of himself and all
others similarly situated,  petition any court of competent jurisdiction for the
appointment of a successor Trustee.

                  (g) The successor Trustee shall give notice of the resignation
and removal of the Trustee and  appointment of the successor  Trustee by mailing
written  notice of such  event by  first-class  mail,  postage  prepaid,  to the
Certificateholders  as their names and addresses  appear in the  Register.  Each
notice shall include the name of such  successor  Trustee and the address of its
Corporate Trust Office.

                  Section 7.10.  Acceptance of Appointment  by Successor.  Every
successor Trustee appointed  hereunder shall execute and deliver to the Company,
the  Authorized  Agents,  the Owner  Trustees  and the Loan  Trustees and to the
retiring  Trustee an instrument  accepting such  appointment,  and thereupon the
resignation or removal of the retiring  Trustee shall become  effective and such
successor  Trustee,  without any further act, deed or  conveyance,  shall become
vested with all the rights,  powers,  trusts and duties of the retiring Trustee;
but, on request of the Company or the successor  Trustee,  such retiring Trustee
shall execute and deliver an instrument  transferring to such successor  Trustee
all such  rights,  powers  and  trusts of the  retiring  Trustee  and shall duly
assign,  transfer and deliver to such successor  Trustee all Trust Property held
by such retiring Trustee  hereunder,  subject  nevertheless to its lien, if any,
provided for in Section 7.07.  Upon request of any such successor  Trustee,  the
Company,  the retiring  Trustee and such  successor  Trustee  shall  execute and
deliver any and all instruments containing such provisions as shall be necessary
or  desirable  to  transfer  and  confirm  to, and for more fully and  certainly
vesting in, such successor Trustee all such rights, powers and trusts.

                  No  institution  shall  accept  its  appointment  as a Trustee
hereunder  unless  at the  time of such  acceptance  such  institution  shall be
qualified and eligible under this Article VII.

                  Section 7.11. Merger, Conversion,  Consolidation or Succession
to Business.  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  of the  Trustee  hereunder,
provided such corporation  shall be otherwise  qualified and eligible under this
Article,  without the execution or filing of any paper or any further act on the
part of any of the  parties  hereto.  In case any  Certificates  shall have been
executed or authenticated, but not delivered, by the Trustee then in office, any
successor by merger,  conversion or consolidation to such authenticating Trustee
may adopt such  execution  or  authentication  and deliver the  Certificates  so
executed or authenticated  with the same effect as if such successor Trustee had
itself executed or authenticated such Certificates.

                  Section 7.12.  Maintenance of Agencies. (a) There shall at all
times be maintained an office or agency where  Certificates  may be presented or
surrendered  for  registration  of  transfer  or for  exchange,  and for payment
thereof and where  notices and demands to or upon the Trustee in respect of such
Certificates  may be served.  Presentations  and demands may be made and notices
may be served at the Corporate Trust Office of the Trustee.

                  (b) There shall at all times be a Registrar and a Paying Agent
hereunder with respect to the Certificates.  Each such Authorized Agent shall be
a bank or trust  company,  shall be a corporation  organized and doing  business
under the laws of the United  States or any state,  with a combined  capital and
surplus of at least $75,000,000,  or a corporation having a combined capital and
surplus in excess of  $5,000,000,  the  obligations of which are guaranteed by a
corporation  organized and doing business under the laws of the United States or
any state,  with a combined  capital  and surplus of at least  $75,000,000,  and
shall be authorized under such laws to exercise corporate trust powers,  subject
to supervision by federal or state  authorities.  The Trustee shall initially be
the Paying  Agent and, as provided in Section  3.04,  Registrar  hereunder  with
respect to the  Certificates.  Each Registrar  shall furnish to the Trustee,  at
stated  intervals  of not more than six  months,  and at such other times as the
Trustee  may  request in  writing,  a copy of the  Register  maintained  by such
Registrar.

                  (c) Any  corporation  into which any  Authorized  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 Authorized
Agent shall be a party,  or any  corporation  succeeding to the corporate  trust
business of any  Authorized  Agent,  shall be the  successor of such  Authorized
Agent hereunder,  if such successor corporation 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  such  Authorized  Agent  or  such  successor
corporation.

                  (d) Any  Authorized  Agent  may at any time  resign  by giving
written notice of resignation  to the Trustee,  the Company,  the Owner Trustees
and the Loan Trustees. The Company may, and at the request of the Trustee shall,
at any time  terminate  the  agency of any  Authorized  Agent by giving  written
notice of  termination  to such  Authorized  Agent and to the Trustee.  Upon the
resignation  or  termination  of an Authorized  Agent or in case at any time any
such  Authorized  Agent shall cease to be eligible under this Section (when,  in
either  case,  no  other  Authorized  Agent  performing  the  functions  of such
Authorized Agent shall have been appointed),  the Company shall promptly appoint
one or more qualified successor  Authorized Agents,  reasonably  satisfactory to
the Trustee, to perform the functions of the Authorized Agent which has resigned
or whose  agency has been  terminated  or who shall have  ceased to be  eligible
under  this  Section.  The  Company  shall  give  written  notice  of  any  such
appointment made by it to the Trustee, the Owner Trustees and the Loan Trustees;
and in each  case the  Trustee  shall  mail  notice of such  appointment  to all
Certificateholders as their names and addresses appear on the Register.

                  (e) The Company agrees to pay, or cause to be paid,  from time
to time to each Authorized Agent reasonable compensation for its services and to
reimburse it for its reasonable expenses.

                  Section  7.13.  Money for  Certificate  Payments to Be Held in
Trust. All moneys deposited with any Paying Agent for the purpose of any payment
on  Certificates  shall be  deposited  and held in trust for the  benefit of the
Certificateholders  entitled to such payment,  subject to the provisions of this
Section. Moneys so deposited and held in trust shall constitute a separate trust
fund for the benefit of the Certificateholders  with respect to which such money
was deposited.

                  The Trustee may at any time,  for the purpose of obtaining the
satisfaction  and discharge of this Agreement or for any other  purpose,  direct
any Paying  Agent to pay to the  Trustee  all sums held in trust by such  Paying
Agent,  such sums to be held by the  Trustee  upon the same trusts as those upon
which such sums were held by such Paying  Agent;  and,  upon such payment by any
Paying  Agent to the  Trustee,  such Paying  Agent  shall be  released  from all
further liability with respect to such money.

                  Section  7.14.  Registration  of  Equipment  Notes  in Name of
Subordination Agent. The Trustee agrees that all Equipment Notes to be purchased
by the  Trust  shall be  issued  in the name of the  Subordination  Agent or its
nominee  and held by the  Subordination  Agent in trust for the  benefit  of the
Certificateholders,  or, if not so held, the Subordination  Agent or its nominee
shall be reflected as the owner of such  Equipment  Notes in the register of the
issuer of such Equipment Notes.

                  Section 7.15.  Representations and Warranties of Trustee.  The Trustee hereby
represents and warrants that:

                  (a) the Trustee is a national  banking  association  organized
         and  validly  existing  in good  standing  under the laws of the United
         States of America;

                  (b) the Trustee has full power,  authority  and legal right to
         execute,   deliver,  and  perform  this  Agreement,  the  Intercreditor
         Agreement  and the  Financing  Agreements  and has taken all  necessary
         action to authorize the execution,  delivery,  and performance by it of
         this  Agreement,   the   Intercreditor   Agreement  and  the  Financing
         Agreements;

                  (c) the execution,  delivery and performance by the Trustee of
         this  Agreement,   the   Intercreditor   Agreement  and  the  Financing
         Agreements  (i) will not violate any provision of United States federal
         law or the law of the state of the  United  States  where it is located
         governing  the  banking  and trust  powers of the Trustee or any order,
         writ,  judgment,  or decree of any court,  arbitrator  or  governmental
         authority applicable to the Trustee or any of its assets, (ii) will not
         violate any provision of the articles of  association or by-laws of the
         Trustee,  or (iii) will not violate any  provision  of, or  constitute,
         with or without notice or lapse of time, a default under,  or result in
         the creation or  imposition of any lien on any  properties  included in
         the  Trust  Property  pursuant  to  the  provisions  of  any  mortgage,
         indenture,  contract,  agreement or other  undertaking to which it is a
         party, which violation, default or lien could reasonably be expected to
         have an  adverse  effect on the  Trustee's  performance  or  ability to
         perform  its duties  hereunder  or  thereunder  or on the  transactions
         contemplated herein or therein;

                  (d) the execution,  delivery and performance by the Trustee of
         this  Agreement,   the   Intercreditor   Agreement  and  the  Financing
         Agreements will not require the authorization, consent, or approval of,
         the giving of notice to, the filing or registration with, or the taking
         of any other action in respect of, any governmental authority or agency
         of the  United  States or the State of the  United  States  where it is
         located  regulating the banking and corporate  trust  activities of the
         Trustee; and

                  (e)  this  Agreement,  the  Intercreditor  Agreement  and  the
         Financing  Agreements  have been duly  executed  and  delivered  by the
         Trustee and constitute the legal,  valid, and binding agreements of the
         Trustee,  enforceable  against it in accordance  with their  respective
         terms,  provided that  enforceability  may be limited by (i) applicable
         bankruptcy,  insolvency,  reorganization,  moratorium  or similar  laws
         affecting the rights of creditors generally and (ii) general principles
         of equity.

                  Section 7.16. Withholding Taxes;  Information  Reporting.  (a)
The Trustee,  as trustee of the grantor trust created by this  Agreement,  shall
exclude and withhold from each distribution of principal,  premium,  if any, and
interest and other  amounts due under this  Agreement or under the  Certificates
any and all withholding taxes applicable thereto as required by law. The Trustee
agrees to act as such withholding agent and, in connection  therewith,  whenever
any present or future taxes or similar  charges are required to be withheld with
respect to any amounts payable in respect of the Certificates,  to withhold such
amounts and timely pay the same to the appropriate  authority in the name of and
on behalf of the Certificateholders, that it will file any necessary withholding
tax returns or statements  when due, and that, as promptly as possible after the
payment  thereof,  it will  deliver to each such  Certificateholder  appropriate
documentation  showing  the  payment  thereof,  together  with  such  additional
documentary evidence as such Certificateholders may reasonably request from time
to time. The Trustee agrees to file any other  information  reports as it may be
required to file under United States law.

                  (b) The Trustee may satisfy  certain of its  obligations  with
respect to this Agreement by retaining, at the expense of the Company, a firm of
independent   public  accountants  (the   "Accountants")   which  shall  (i)  be
responsible for all tax filing  requirements and (ii) perform the obligations of
the Trustee in respect of tax filing  requirements.  The Trustee shall be deemed
to have  discharged  its tax filing  obligations  under this  Agreement upon its
retention of the  Accountants,  and, if the Trustee  shall have  selected in the
Accountants  in good faith and without gross  negligence,  the Trustee shall not
have any liability with respect to the default or misconduct of the Accountants.

                  (c) The Trustee, at the request of the Company, will make such
United  States  federal  income tax elections as may be necessary to prevent the
Trust from being  classified  for federal  income tax purposes as an association
taxable as a corporation.

                  Section 7.17.  Trustee's  Liens. The Trustee in its individual
capacity  agrees  that it will at its own cost  and  expense  promptly  take any
action as may be necessary to duly  discharge  and satisfy in full any mortgage,
pledge,  lien,  charge,  encumbrance,  security  interest  or claim  ("Trustee's
Liens") on or with respect to the Trust  Property which is  attributable  to the
Trustee  either (i) in its  individual  capacity  and which is  unrelated to the
transactions  contemplated by this Agreement,  the Intercreditor  Agreement, the
Financing Agreements or the Financing Documents, or (ii) as Trustee hereunder or
in its individual  capacity and which arises out of acts or omissions  which are
not contemplated by this Agreement.

                  Section 7.18.  Preferential  Collection of Claims. The Trustee
shall comply with  Section  311(a) of the Trust  Indenture  Act,  excluding  any
creditor  relationship  listed in Section 311(b) of the Trust  Indenture Act. If
the  Trustee  shall  resign or be  removed  as  Trustee,  it shall be subject to
Section 311(a) of the Trust Indenture Act to the extent provided therein.


                                  ARTICLE VIII

                CERTIFICATEHOLDERS' LISTS AND REPORTS BY TRUSTEE

                  Section  8.01.  The Company to Furnish  Trustee with Names and
Addresses  of  Certificateholders.  The  Company  will  furnish  or  cause to be
furnished to the Trustee within 15 days after each Record Date with respect to a
Scheduled Payment, and at such other times as the Trustee may request in writing
within 30 days after receipt by the Company of any such request, a list, in such
form as the Trustee may reasonably require, of all information in the possession
or   control   of  the   Company   as  to  the  names  and   addresses   of  the
Certificateholders, in each case as of a date not more than 15 days prior to the
time such list is furnished;  provided,  however, that so long as the Trustee is
the sole  Registrar,  no such  list need be  furnished;  and  provided  further,
however,  that  no such  list  need  be  furnished  for so long as a copy of the
Register is being furnished to the Trustee pursuant to Section 7.12.

                  Section 8.02.  Preservation of Information;  Communications to
Certificateholders.  The  Trustee  shall  preserve,  in as  current a form as is
reasonably practicable,  the names and addresses of Certificateholders contained
in the most recent list  furnished to the Trustee as provided in Section 7.12 or
Section   8.01,   as  the  case  may  be,  and  the  names  and   addresses   of
Certificateholders  received by the Trustee in its capacity as Registrar,  if so
acting.  The Trustee may destroy any list furnished to it as provided in Section
7.12 or  Section  8.01,  as the  case  may be,  upon  receipt  of a new  list so
furnished.

                  Section 8.03. Reports by Trustee.  Within 60 days after May 15
of each year  commencing  with the first full year following the issuance of the
Certificates, the Trustee shall transmit to the Certificateholders,  as provided
in Section  313(c) of the Trust  Indenture  Act, a brief report dated as of such
May 15, if required by Section 313(a) of the Trust Indenture Act.

                  Section 8.04.  Reports by the Guarantor and the Company.  The Guarantor and the
Company shall:

                  (a) file with the Trustee,  within 30 days after the Guarantor
         or the Company is required to file the same with the SEC, copies of the
         annual reports and of the information,  documents and other reports (or
         copies of such  portions  of any of the  foregoing  as the SEC may from
         time to time by rules and regulations prescribe) which the Guarantor or
         the Company is required to file with the SEC  pursuant to section 13 or
         section 15(d) of the Securities  Exchange Act of 1934, as amended;  or,
         if the  Guarantor or the Company is not  required to file  information,
         documents or reports pursuant to either of such sections,  then to file
         with the Trustee and the SEC, in accordance  with rules and regulations
         prescribed  by  the  SEC,  such  of  the   supplementary  and  periodic
         information,  documents and reports  which may be required  pursuant to
         section 13 of the  Securities  Exchange  Act of 1934,  as  amended,  in
         respect of a security  listed and  registered on a national  securities
         exchange as may be prescribed in such rules and regulations;

                  (b) file with the Trustee and the SEC, in accordance  with the
         rules  and   regulations   prescribed  by  the  SEC,  such   additional
         information,  documents  and reports with respect to  compliance by the
         Guarantor  and the Company  with the  conditions  and  covenants of the
         Guarantor  and the Company  provided for in this  Agreement,  as may be
         required  by such  rules  and  regulations,  including,  in the case of
         annual reports, if required by such rules and regulations, certificates
         or opinions of independent public accountants;

                  (c) transmit to all  Certificateholders,  in the manner and to
         the extent  provided in Section 313(c) of the Trust  Indenture Act such
         summaries  of any  information,  documents  and reports  required to be
         filed by the Guarantor and the Company  pursuant to subsections (a) and
         (b) of this  Section  8.04 as may be required by rules and  regulations
         prescribed by the SEC;

                  (d) furnish to the Trustee,  not less often than  annually,  a
         brief  certificate  from the  principal  executive  officer,  principal
         financial  officer  or  principal  accounting  officer as to his or her
         knowledge of the  Guarantor's  and the  Company's  compliance  with all
         conditions and covenants under this Agreement (it being understood that
         for purposes of this paragraph (d), such compliance shall be determined
         without regard to any period of grace or requirement of notice provided
         under this Agreement); and

                  (e) make available to any Certificateholder, upon request, the
         annual  audited and  quarterly  unaudited  financial  statements of the
         Guarantor which are provided to the Trustee.


                                   ARTICLE IX

                             SUPPLEMENTAL AGREEMENTS

                  Section  9.01.  Supplemental  Agreements  Without  Consent  of
Certificateholders. Without the consent of the Certificateholders, the Guarantor
and the Company may and the Trustee (subject to Section 9.03) shall, at any time
and from time to time, enter into one or more agreements supplemental hereto or,
if applicable,  to the Intercreditor Agreement or the Liquidity Facility in form
and substance satisfactory to the Trustee, for any of the following purposes:

                  (1) to evidence the  succession of another  corporation to the
         Company or the  Guarantor and the  assumption by any such  successor of
         the covenants of the Company or the Guarantor herein contained; or

                  (2) to add to the  covenants  of the Company or the  Guarantor
         for the benefit of the Certificateholders, or to surrender any right or
         power in this Agreement conferred upon the Company or the Guarantor; or

                  (3) to correct or supplement any provision in this  Agreement,
         the  Intercreditor  Agreement or the  Liquidity  Facility  which may be
         defective or inconsistent  with any other  provision  herein or to make
         any other provisions with respect to matters or questions arising under
         this Agreement,  the Intercreditor Agreement or the Liquidity Facility,
         provided that any such action shall not adversely  affect the interests
         of the  Certificateholders;  or to cure any  ambiguity  or correct  any
         mistake; or

                  (4) to  modify,  eliminate  or add to the  provisions  of this
         Agreement  to such  extent  as  shall  be  necessary  to  continue  the
         qualification of this Agreement (including any supplemental  agreement)
         under the Trust  Indenture  Act or under any  similar  Federal  statute
         hereafter  enacted,  and to add to this Agreement such other provisions
         as may be expressly  permitted by the Trust  Indenture Act,  excluding,
         however,  the provisions  referred to in Section 316(a)(2) of the Trust
         Indenture Act as in effect at the date as of which this  instrument was
         executed or any corresponding  provision in any similar Federal statute
         hereafter enacted; or

                  (5) to evidence and provide for the  acceptance of appointment
         under this  Agreement by the Trustee of a successor  Trustee and to add
         to or  change  any of the  provisions  of this  Agreement  as  shall be
         necessary to provide for or facilitate the administration of the Trust,
         pursuant to the requirements of Section 7.10;


provided  that no such action  described in this  Section 9.01 shall  materially
adversely affect the interests of the Certificateholders.

                  Section  9.02.   Supplemental   Agreements   with  Consent  of
Certificateholders.   With  the  consent  of  the   Certificateholders   holding
Certificates evidencing Fractional Undivided Interests aggregating not less than
a majority in interest in the Trust, by Act of said Certificateholders delivered
to the Guarantor, the Company and the Trustee, the Guarantor and the Company may
(with the consent of the Owner  Trustees,  if any,  which  consent  shall not be
unreasonably  withheld),  and the Trustee (subject to Section 9.03) shall, enter
into an agreement or  agreements  supplemental  hereto for the purpose of adding
any provisions to or changing in any manner or eliminating any of the provisions
of this Agreement,  the Intercreditor  Agreement,  the Liquidity Facility or any
Financing  Agreement to the extent applicable to such  Certificateholders  or of
modifying in any manner the rights and  obligations  of such  Certificateholders
under this Agreement, the Intercreditor Agreement, the Liquidity Facility or any
Financing  Agreement;  provided,  however,  that no such supplemental  agreement
shall,  without  the  consent  of  the  Certificateholder  of  each  Outstanding
Certificate affected thereby:

                  (1)  reduce in any  manner  the amount of, or delay the timing
         of, any receipt by the Trustee of payments on the Equipment  Notes held
         in the Trust or  distributions  that are  required to be made herein on
         any Certificate,  or change any date of payment of any Certificate,  or
         change the place of payment  where,  or the coin or  currency in which,
         any  Certificate is payable,  or impair the right to institute suit for
         the  enforcement  of any such payment or  distribution  on or after the
         Regular  Distribution  Date or  Special  Distribution  Date  applicable
         thereto; or

                  (2) permit the  disposition  of any Equipment Note included in
         the Trust Property except as permitted by this Agreement,  or otherwise
         deprive such  Certificateholder  of the benefit of the ownership of the
         Equipment Notes in the Trust; or

                  (3)      alter the priority of distributions specified in the Intercreditor Agreement;
         or

                  (4) modify any of the  provisions  of this  Section or Section
         6.05, except to increase any such percentage or to provide that certain
         other provisions of this Agreement cannot be modified or waived without
         the  consent  of the  Certificateholder  of each  Certificate  affected
         thereby.

                  It shall not be  necessary  for any Act of  Certificateholders
under this Section to approve the particular  form of any proposed  supplemental
agreement,  but it shall be  sufficient  if such Act shall approve the substance
thereof.

                  Section 9.03. Documents Affecting Immunity or Indemnity. If in
the opinion of the Trustee any  document  required to be executed by it pursuant
to the terms of Section 9.01 or 9.02 affects any interest, right, duty, immunity
or indemnity in favor of the Trustee  under this  Agreement,  the Trustee may in
its discretion decline to execute such document.

                  Section  9.04.  Execution  of  Supplemental   Agreements.   In
executing,  or accepting  the  additional  trusts  created by, any  supplemental
agreement  permitted by this Article or the modifications  thereby of the trusts
created by this Agreement,  the Trustee shall be entitled to receive,  and shall
be fully  protected  in relying  upon,  an Opinion of Counsel  stating  that the
execution  of such  supplemental  agreement is  authorized  or permitted by this
Agreement.

                  Section  9.05.  Effect of  Supplemental  Agreements.  Upon the
execution of any agreement  supplemental  to this Agreement  under this Article,
this Agreement shall be modified in accordance therewith,  and such supplemental
agreement  shall  form a part of this  Agreement  for all  purposes;  and  every
Certificateholder   theretofore  or  thereafter   authenticated   and  delivered
hereunder shall be bound thereby.

                  Section  9.06.  Conformity  with Trust  Indenture  Act.  Every
supplemental  agreement  executed  pursuant to this Article shall conform to the
requirements of the Trust Indenture Act as then in effect.

                  Section  9.07.   Reference  in  Certificates  to  Supplemental
Agreements.  Certificates authenticated and delivered after the execution of any
supplemental  agreement  pursuant  to this  Article  may bear a notation in form
approved  by the  Trustee as to any  matter  provided  for in such  supplemental
agreement;  and, in such case,  suitable  notation may be made upon  Outstanding
Certificates after proper presentation and demand.


                                    ARTICLE X

                AMENDMENTS TO INDENTURES AND FINANCING DOCUMENTS

                  Section 10.01.  Amendments  and  Supplements to Indentures and
Other  Financing  Documents.  In the event  that the  Trustee,  as holder of any
Equipment  Note  in  trust  for  the  benefit  of the  Certificateholders  or as
Controlling  Party,   receives  a  request  for  a  consent  to  any  amendment,
modification,  waiver or  supplement  under  any  Indenture  or other  Financing
Document,  the Trustee shall forthwith send a notice of such proposed amendment,
modification,  waiver or supplement to each Certificateholder  registered on the
Register as of the date of such  notice.  The  Trustee  shall  request  from the
Certificateholders  a Direction as to (a) whether or not to take or refrain from
taking  any  action  which a holder  of such  Equipment  Note has the  option to
direct, (b) whether or not to give or execute any waivers, consents, amendments,
modifications  or  supplements as a holder of such Equipment Note and (c) how to
vote any  Equipment  Note if a vote has been  called for with  respect  thereto.
Provided such a request for Certificateholder Direction shall have been made, in
directing  any action or casting any vote or giving any consent as the holder of
any  Equipment  Note,  the  Trustee  shall vote for or give  consent to any such
action with respect to such Equipment Note in the same proportion as that of (i)
the aggregate face amounts of all Certificates actually voted in favor of or for
giving  consent  to such  action by such Act of  Certificateholders  to (ii) the
aggregate  face  amount of all  Outstanding  Certificates.  For  purposes of the
immediately  preceding sentence,  a Certificate shall have been "actually voted"
if the Holder of such  Certificate  has  delivered to the Trustee an  instrument
evidencing  such Holder's  consent to such Direction on or prior to the Business
Day  before the  Trustee  directs  such  action or casts such vote or gives such
consent.  Notwithstanding  the  foregoing,  but subject to Section  6.04 and the
Intercreditor  Agreement,  the Trustee may, in its own discretion and at its own
direction,  consent and notify the relevant  Loan Trustee of such consent to any
amendment,  modification,  waiver or supplement under the relevant  Indenture or
any other  Financing  Document,  if an Event of  Default  hereunder  shall  have
occurred and be continuing,  or if such  amendment,  modification or waiver will
not adversely affect the interests of the Certificateholders.


                                   ARTICLE XI

                              TERMINATION OF TRUST

                  Section  11.01.  Termination  of  the  Trust.  The  respective
obligations and  responsibilities of the Company,  the Guarantor and the Trustee
with respect to the Trust shall  terminate upon the  distribution to all Holders
of  Certificates  and the Trustee of all amounts  required to be  distributed to
them pursuant to this Agreement and the disposition of all property held as part
of the  Trust  Property;  provided,  however,  that in no event  shall the Trust
continue  beyond one hundred ten (110) years  following the date of the earliest
execution of this Trust Agreement.

                  Notice of any termination, specifying the Regular Distribution
Date  (or  Special  Distribution  Date,  as the  case  may be)  upon  which  the
Certificateholders  may surrender their  Certificates to the Trustee for payment
of the final  distribution  and  cancellation,  shall be mailed  promptly,  upon
notice to the Trustee, by the Trustee to Certificateholders not earlier than the
60th day and not later than the 20th day next preceding such final  distribution
specifying (A) the Regular  Distribution Date (or Special  Distribution Date, as
the case may be) upon which the proposed final payment of the Certificates  will
be made upon  presentation and surrender of Certificates at the office or agency
of the Trustee  therein  specified,  (B) the amount of any such  proposed  final
payment,  and (C) that the Record  Date  otherwise  applicable  to such  Regular
Distribution  Date (or  Special  Distribution  Date,  as the case may be) is not
applicable,  payments  being made only upon  presentation  and  surrender of the
Certificates  at the  office or agency of the  Trustee  therein  specified.  The
Trustee shall give such notice to the Registrar at the time such notice is given
to  Certificateholders.  Upon  presentation and surrender of the Certificates in
accordance  with such  notice,  the  Trustee  shall cause to be  distributed  to
Certificateholders such final distribution pursuant to Section 4.02.

                  In the  event  that all of the  Certificateholders  shall  not
surrender their  Certificates for cancellation  within six months after the date
specified in the above-mentioned written notice, the Trustee shall give a second
written  notice  to  the  remaining   Certificateholders   to  surrender   their
Certificates for cancellation  and receive the final  distribution  with respect
thereto.  No  additional  interest  shall accrue on the  Certificates  after the
Regular  Distribution  Date (or Special  Distribution  Date, as the case may be)
specified in the first written  notice.  In the event that any money held by the
Trustee  for the  payment of  distributions  on the  Certificates  shall  remain
unclaimed  for two years (or such lesser time as the Trustee shall be satisfied,
after sixty days'  notice  from the  Company,  is one month prior to the escheat
period  provided under  applicable law) after the final  distribution  date with
respect  thereto,  the Trustee  shall pay to each Loan  Trustee the  appropriate
amount of money  relating  to such Loan  Trustee and shall give  written  notice
thereof to the related Owner Trustees, the Owner Participants and the Company.


                                   ARTICLE XII

                            MISCELLANEOUS PROVISIONS

                  Section 12.01. Limitation on Rights of Certificateholders. The
death or incapacity of any Certificateholder shall not operate to terminate this
Agreement   or  the  Trust,   nor   entitle   such   Certificateholder's   legal
representatives  or  heirs  to claim an  accounting  or to take  any  action  or
commence any proceeding in any court for a partition or winding up of the Trust,
nor otherwise  affect the rights,  obligations,  and  liabilities of the parties
hereto or any of them.

                  Section  12.02.  Certificates  Nonassessable  and Fully  Paid.
Except   as  set   forth  in  the  last   sentence   of  this   Section   12.02,
Certificateholders  shall not be personally liable for obligations of the Trust,
the Fractional  Undivided  Interests  represented by the  Certificates  shall be
nonassessable  for any  losses  or  expenses  of the  Trust  or for  any  reason
whatsoever,  and  Certificates,  upon  authentication  thereof  by  the  Trustee
pursuant  to  Section   3.03,   are  and  shall  be  deemed   fully   paid.   No
Certificateholder  shall have any right (except as expressly provided herein) to
vote or in any manner  otherwise  control the  operation  and  management of the
Trust Property,  the Trust, or the obligations of the parties hereto,  nor shall
anything set forth  herein,  or contained in the terms of the  Certificates,  be
construed  so as to  constitute  the  Certificateholders  from  time  to time as
partners or members of an  association.  Neither the  existence of the Trust nor
any  provision   herein  is  intended  to  or  shall  limit  the  liability  the
Certificateholders  would otherwise incur if the Certificateholders  owned Trust
Property as co-owners, or incurred any obligations of the Trust, directly rather
than through the Trust.

                  Section  12.03.  Notices.  (a) Unless  otherwise  specifically
provided  herein,  all notices  required  under the terms and provisions of this
Agreement  shall be in English and in writing,  and any such notice may be given
by United States mail, courier service or telecopy, and any such notice shall be
effective when delivered or received or, if mailed,  three days after deposit in
the United States mail with proper postage for ordinary mail prepaid,

                  if to the Company or the Guarantor, to:

                           Atlantic Coast Airlines
                           515A Shaw Road
                           Dulles, Virginia  20166
                           Attention:  Chief Financial Officer
                           Facsimile:  (703) 925-6294

                  if to the Trustee, to:

                           The First National Bank of Maryland
                           25 South Charles Street
                           Mail Code 101-591
                           Baltimore, Maryland  21201
                           Attention:  Corporate Trust Department
                           Facsimile:  (410) 244-4626
                           Telephone:  (410) 244-4236

                  (b) The Company,  the  Guarantor or the Trustee,  by notice to
the other,  may  designate  additional  or different  addresses  for  subsequent
notices or communications.

                  (c) Any notice or communication to Certificateholders shall be
mailed by first-class mail to the addresses for Certificateholders  shown on the
Register kept by the Registrar.  Failure so to mail a notice or communication or
any defect in such notice or communication shall not affect its sufficiency with
respect to other Certificateholders.

                  (d) If a notice  or  communication  is  mailed  in the  manner
provided above within the time prescribed,  it is conclusively  presumed to have
been duly given, whether or not the addressee receives it.

                  (e) If the  Company  mails a notice  or  communication  to the
Certificateholders,  it shall mail a copy to the Trustee and to the Paying Agent
at the same time.

                  (f)  Notwithstanding  the  foregoing,  all  communications  or
notices  to the  Trustee  shall be deemed to be given  only when  received  by a
Responsible Officer of the Trustee.

                  (g) The Trustee shall promptly furnish the Company with a copy
of any demand, notice or written communication received by the Trustee hereunder
from any Certificateholder, Owner Trustee or Loan Trustee.

                  Section   12.04.   Governing  Law.  THIS  AGREEMENT  HAS  BEEN
DELIVERED IN THE STATE OF NEW YORK AND THIS AGREEMENT AND THE CERTIFICATES SHALL
BE GOVERNED BY AND  CONSTRUED  IN  ACCORDANCE  WITH THE LAWS OF THE STATE OF NEW
YORK WITHOUT REGARD TO CONFLICTS-OF-LAW PRINCIPLES.

                  Section 12.05.  Severability of Provisions. If any one or more
of the covenants, agreements, provisions or terms of this Agreement shall be for
any reason whatsoever held invalid, then such covenants, agreements, provisions,
or terms shall be deemed  severable  from the remaining  covenants,  agreements,
provisions or terms of this Agreement and shall in no way affect the validity or
enforceability of the other provisions of this Agreement or the Trust, or of the
Certificates or the rights of the Certificateholders thereof.

                  Section 12.06.  Effect of Headings and Table of Contents.  The Article and
Section headings herein and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                  Section  12.07.   Successors   and  Assigns.   All  covenants,
agreements, representations and warranties in this Agreement by the Trustee, the
Guarantor and the Company shall bind and, to the extent permitted hereby,  shall
inure to the benefit of and be  enforceable by their  respective  successors and
assigns, whether so expressed or not.

                  Section  12.08.   Benefits  of  Agreement.   Nothing  in  this
Agreement or in the Certificates,  express or implied, shall give to any Person,
other  than  the  parties  hereto  and  their  successors  hereunder,   and  the
Certificateholders, any benefit or any legal or equitable right, remedy or claim
under this Agreement.

                  Section 12.09.  Legal Holidays.  In any case where any Regular
Distribution Date or Special Distribution Date relating to any Certificate shall
not be a  Business  Day,  then  (notwithstanding  any  other  provision  of this
Agreement)  payment  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 such
Regular  Distribution Date or Special  Distribution  Date, and no interest shall
accrue during the intervening period.

                  Section 12.10.  Counterparts.  For the purpose of facilitating
the execution of this  Agreement and for other  purposes,  this Agreement may be
executed   simultaneously   in  any  number  of  counterparts,   each  of  which
counterparts  shall be deemed to be an original,  and all of which  counterparts
shall constitute but one and the same instrument.

                  Section 12.11.  Communication by Certificateholders with Other
Certificateholders.    Certificateholders    may    communicate    with    other
Certificateholders  with  respect to their  rights  under this  Agreement or the
Certificates pursuant to Section 312(b) of the Trust Indenture Act. The Company,
the  Guarantor,  the Trustee and any and all other  persons  benefitted  by this
Agreement  shall have the  protection  afforded  by Section  312(c) of the Trust
Indenture Act.


<PAGE>


                  IN WITNESS WHEREOF,  the parties have caused this Agreement to
be duly executed by their  respective  officers  thereunto duly authorized as of
the day and year first written above.


                                                              ATLANTIC COAST AIRLINES


                                                              By
                                                                  Name:
                                                                       Title:



                                                              ATLANTIC COAST AIRLINES, INC.


                                                              By
                                                                  Name:
                                                                       Title:



                                                              THE FIRST NATIONAL BANK OF MARYLAND, as
                                                              Trustee


                                                              By
                                                                  Name:  Robert D. Brown
                                                                  Title:  Assistant Vice President



<PAGE>


                                       A-1










179212.3/NYL2
179212.3/NYL2




179212.3/NYL2
                                                                                                          EXHIBIT A


<PAGE>


                                       A-7










179212.3/NYL2


                               FORM OF CERTIFICATE



REGISTERED

No. ______________


         [THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND,  ACCORDINGLY,  MAY NOT
         BE OFFERED OR SOLD  WITHIN THE UNITED  STATES OR TO, OR FOR THE ACCOUNT
         OR  BENEFIT  OF,  ANY  PERSONS  EXCEPT  AS SET  FORTH IN THE  FOLLOWING
         SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A)
         IT IS A "QUALIFIED  INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER
         THE SECURITIES ACT), (B) IT IS AN INSTITUTIONAL  "ACCREDITED  INVESTOR"
         (AS DEFINED IN RULE  501(a)(1),  (2), (3) OR (7) OF  REGULATION D UNDER
         THE SECURITIES ACT) (AN "INSTITUTIONAL  ACCREDITED INVESTOR") OR (C) IT
         IS NOT A U.S.  PERSON AND IS ACQUIRING THIS  CERTIFICATE IN AN OFFSHORE
         TRANSACTION IN COMPLIANCE  WITH  REGULATION S UNDER THE SECURITIES ACT;
         (2) AGREES  THAT IT WILL NOT  WITHIN  TWO YEARS  AFTER THE LATER OF THE
         ORIGINAL  ISSUANCE OF THIS  CERTIFICATE  OR THE LAST DATE ON WHICH THIS
         CERTIFICATE  WAS  HELD  BY  ATLANTIC  COAST  AIRLINES  ("ACA")  OR  ANY
         AFFILIATE OF ACA, RESELL OR OTHERWISE  TRANSFER THIS CERTIFICATE EXCEPT
         (A) TO ACA OR ANY SUBSIDIARY THEREOF, (B) INSIDE THE UNITED STATES TO A
         QUALIFIED  INSTITUTIONAL  BUYER IN COMPLIANCE  WITH RULE 144A UNDER THE
         SECURITIES  ACT,  (C)  INSIDE  THE  UNITED  STATES TO AN  INSTITUTIONAL
         ACCREDITED  INVESTOR  ACQUIRING  $100,000 OR MORE  AGGREGATE  PRINCIPAL
         AMOUNT OF SUCH CERTIFICATE  THAT, PRIOR TO SUCH TRANSFER,  FURNISHES TO
         THE TRUSTEE A SIGNED  LETTER  CONTAINING  CERTAIN  REPRESENTATIONS  AND
         AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS CERTIFICATE
         (THE  FORM OF WHICH  LETTER  CAN BE  OBTAINED  FROM THE  TRUSTEE),  (D)
         OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH
         RULE 904 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 AN EFFECTIVE REGISTRATION STATEMENT UNDER
         THE SECURITIES  ACT; AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON
         TO WHOM THIS  CERTIFICATE IS TRANSFERRED A NOTICE  SUBSTANTIALLY TO THE
         EFFECT  OF  THIS  LEGEND.  IN  CONNECTION  WITH  ANY  TRANSFER  OF THIS
         CERTIFICATE  WITHIN TWO YEARS AFTER THE LATER OF THE ORIGINAL  ISSUANCE
         OF THIS CERTIFICATE OR THE LAST DATE ON WHICH THIS CERTIFICATE WAS HELD
         BY ACA OR ANY  AFFILIATE OF ACA, 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 THE TRUSTEE.  IF THE PROPOSED
         TRANSFEREE IS AN INSTITUTIONAL  ACCREDITED  INVESTOR,  THE HOLDER MUST,
         PRIOR  TO  SUCH   TRANSFER,   FURNISH  TO  THE  TRUSTEE  AND  ACA  SUCH
         CERTIFICATIONS,  LEGAL OPINIONS OR OTHER  INFORMATION AS EITHER OF THEM
         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.
         THE PASS THROUGH  TRUST  AGREEMENT  CONTAINS A PROVISION  REQUIRING THE
         TRUSTEE TO REFUSE TO  REGISTER  ANY  TRANSFER  OF THIS  CERTIFICATE  IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.]*

         [UNLESS THIS  CERTIFICATE IS PRESENTED BY AN AUTHORIZED  REPRESENTATIVE
         OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE
         TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND  ANY  CERTIFICATE  ISSUED  IN  EXCHANGE  FOR  THIS  CERTIFICATE  IS
         REGISTERED  IN THE  NAME OF  CEDE & CO.  OR IN  SUCH  OTHER  NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL  CERTIFICATE  SHALL BE LIMITED TO TRANSFERS IN
         WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR
         SUCH  SUCCESSOR'S  NOMINEE  AND  TRANSFERS  OF  PORTIONS OF THIS GLOBAL
         CERTIFICATE  SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH THE
         RESTRICTIONS  SET FORTH IN SECTIONS  3.05 AND 3.06 OF THE PASS  THROUGH
         TRUST AGREEMENT REFERRED TO HEREIN.]*

         ANY PERSON  ACQUIRING THIS PASS THROUGH  CERTIFICATE  WILL BE DEEMED TO
         REPRESENT  AND WARRANT  THAT (i) NO ASSETS OF AN EMPLOYEE  BENEFIT PLAN
         SUBJECT TO TITLE I OF THE EMPLOYEE  RETIREMENT  INCOME  SECURITY ACT OF
         1974, AS AMENDED ("ERISA") OR AN INDIVIDUAL  RETIREMENT ACCOUNT OR PLAN
         SUBJECT TO 4975 OF THE CODE,  OR ANY TRUST  ESTABLISHED  UNDER ANY SUCH
         PLAN OR  ACCOUNT,  HAVE  BEEN USED TO  ACQUIRE  OR HOLD ANY OF THE PASS
         THROUGH  CERTIFICATES  OR  (ii)  THAT  ONE OR  MORE  ADMINISTRATIVE  OR
         STATUTORY  EXEMPTIONS  FROM  THE  PROHIBITED  TRANSACTION  RULES  UNDER
         SECTION  406 OF  ERISA  AND  SECTION  4975 OF THE CODE  APPLIES  TO ITS
         PURCHASE  AND HOLDING OF THIS PASS  THROUGH  CERTIFICATE  SUCH THAT ITS
         PURCHASE AND HOLDING OF THIS PASS THROUGH  CERTIFICATE  WILL NOT RESULT
         IN A NON-EXEMPT  PROHIBITED  TRANSACTION UNDER SECTION 406 OF ERISA AND
         SECTION 4975 OF THE CODE.


<PAGE>


                              [GLOBAL CERTIFICATE]*

               ATLANTIC COAST AIRLINES 1997-1A PASS THROUGH TRUST

             7.20% Atlantic Coast Airlines Pass Through Certificate
                                 Series 1997-1A

                Final Expected Distribution Date: January 1, 2014

evidencing a  fractional  undivided  interest in a trust,  the property of which
includes certain  equipment notes each secured by an Aircraft leased to or owned
by Atlantic Coast Airlines.


                                    $             Fractional Undivided Interest
                                    representing .        % of the Trust per $1,000 face amount

                  THIS  CERTIFIES THAT , for value  received,  is the registered
owner of a $ ( dollars) Fractional Undivided Interest in Atlantic Coast Airlines
1997-1A  Pass Through  Trust (the  "Trust")  created  pursuant to a Pass Through
Trust  Agreement,  dated as of September 25, 1997 (the  "Agreement"),  among The
First  National Bank of Maryland (the  "Trustee"),  Atlantic Coast  Airlines,  a
corporation incorporated under California law (the "Company") and Atlantic Coast
Airlines, Inc., a corporation incorporated under Delaware law (the "Guarantor"),
a summary of certain of the pertinent provisions of which is set forth below. To
the extent not otherwise defined herein,  the capitalized terms used herein have
the meanings  assigned to them in the Agreement.  This Certificate is one of the
duly authorized  Certificates  designated as "7.20% Atlantic Coast Airlines Pass
Through  Certificates Series 1997-1A" (herein called the  "Certificates").  This
Certificate  is issued  under  and is  subject  to the  terms,  provisions,  and
conditions  of  the  Agreement.   By  virtue  of  its   acceptance   hereof  the
Certificateholder  of this Certificate  assents to and agrees to be bound by the
provisions of the Agreement and the Intercreditor Agreement. The property of the
Trust includes  certain  Equipment  Notes and all rights of the Trust to receive
payments  under the  Intercreditor  Agreement  and the  Liquidity  Facility (the
"Trust Property").  Each issue of the Equipment Notes is secured by, among other
things, a security interest in the Aircraft leased to or owned by the Company.

                  The Certificates  represent  fractional undivided interests in
the Trust and the Trust  Property,  and have no rights,  benefits or interest in
respect of any assets or property other than the Trust Property.

                  Subject to and in  accordance  with the terms of the Agreement
and the Intercreditor Agreement,  from and to the extent of funds then available
to the  Trustee,  there  will be  distributed  on each  January  1 and July 1 (a
"Regular  Distribution  Date"),  commencing on January 1, 1998, to the Person in
whose name this  Certificate  is registered at the close of business on the 15th
day  preceding  the  Regular  Distribution  Date,  an amount in  respect  of the
Scheduled Payments on the Equipment Notes due on such Regular Distribution Date,
the receipt of which has been confirmed by the Trustee,  equal to the product of
the percentage interest in the Trust evidenced by this Certificate and an amount
equal to the sum of such Scheduled  Payments.  Subject to and in accordance with
the terms of the Agreement and the  Intercreditor  Agreement,  in the event that
Special Payments on the Equipment Notes are received by the Trustee,  from funds
then  available to the Trustee,  there shall be  distributed  on the  applicable
Special  Distribution  Date,  to the  Person in whose name this  Certificate  is
registered  at the  close of  business  on the 15th day  preceding  the  Special
Distribution  Date,  an  amount  in  respect  of such  Special  Payments  on the
Equipment Notes,  the receipt of which has been confirmed by the Trustee,  equal
to the  product  of the  percentage  interest  in the  Trust  evidenced  by this
Certificate and an amount equal to the sum of such Special Payments so received.
If a Regular  Distribution  Date or Special  Distribution Date is not a Business
Day,  distribution shall be made on the immediately  following Business Day with
the same  force  and  effect  as if made on such  Regular  Distribution  Date or
Special  Distribution  Date and no interest shall accrue during the  intervening
period.  The Trustee  shall mail notice of each Special  Payment and the Special
Distribution Date therefor to the Certificateholder of this Certificate.

                  Except   as   otherwise   provided   in  the   Agreement   and
notwithstanding  the above,  the final  distribution on this Certificate will be
made after notice mailed by the Trustee of the pendency of such distribution and
only upon presentation and surrender of this Certificate at the office or agency
of the Trustee specified in such notice.

                  THE  AGREEMENT AND THIS  CERTIFICATE  SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS-OF-LAW PRINCIPLES.

                  Reference  is hereby  made to the further  provisions  of this
Certificate set forth in the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.


<PAGE>


                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed.

Dated:  _____________,                                        ATLANTIC COAST AIRLINES
                                                                  1997-1A               PASS THROUGH
TRUST

                                                              By:  The First National Bank of Maryland,
                                                                       not in its individual capacity but
                                                                       solely as Trustee


                                                                   By:
                                                                         Name:
                                                                         Title:



<PAGE>


              [FORM OF THE TRUSTEE'S CERTIFICATE OF AUTHENTICATION]


<PAGE>


                                       A-9










179212.3/NYL2


                    This is one of the Certificates referred
                      to in the within-mentioned Agreement.



                                                              The First National Bank of Maryland,
                                                                  not in its individual capacity but
                                                                  solely as Trustee



                                                                   By:
                                                                                  Authorized Officer



<PAGE>


                            [REVERSE OF CERTIFICATE]


                  The  Certificates do not represent a direct  obligation of, or
an obligation  guaranteed  by, or an interest in, the Company,  the Guarantor or
the Trustee or any of their affiliates. The Certificates are limited in right or
payment,  all as more  specifically  set  forth  on the face  hereof  and in the
Agreement.  All payments or distributions made to  Certificateholders  under the
Agreement shall be made only from the Trust Property and only to the extent that
the Trustee shall have sufficient  income or proceeds from the Trust Property to
make  such  payments  in  accordance  with  the  terms  of the  Agreement.  Each
Certificateholder of this Certificate,  by its acceptance hereof, agrees that it
will look  solely to the  income and  proceeds  from the Trust  Property  to the
extent available for distribution to such  Certificateholder  as provided in the
Agreement.  This  Certificate  does not purport to summarize  the  Agreement and
reference  is  made  to  the  Agreement  for  information  with  respect  to the
interests, rights, benefits, obligations, proceeds, and duties evidenced hereby.
A copy of the Agreement  may be examined  during  normal  business  hours at the
principal office of the Trustee, and at such other places, if any, designated by
the Trustee, by any Certificateholder upon request.

                  The  Agreement   permits,   with  certain  exceptions  therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations   of  the  Company  and  the   Guarantor   and  the  rights  of  the
Certificateholders under the Agreement at any time by the Guarantor, the Company
and the Trustee with the consent of the Certificateholders  holding Certificates
evidencing  Fractional Undivided Interests  aggregating not less than a majority
in  interest in the Trust.  Any such  consent by the  Certificateholder  of this
Certificate shall be conclusive and binding on such  Certificateholder  and upon
all future  Certificateholders of this Certificate and of any Certificate issued
upon the transfer  hereof or in exchange hereof or in lieu hereof whether or not
notation  of such  consent is made upon this  Certificate.  The  Agreement  also
permits the amendment  thereof,  in certain limited  circumstances,  without the
consent of the Certificateholders of any of the Certificates.

                  As   provided  in  the   Agreement   and  subject  to  certain
limitations  therein set forth,  the transfer of this Certificate is registrable
in the Register upon surrender of this  Certificate for registration of transfer
at the  offices  or  agencies  maintained  by the  Trustee  in its  capacity  as
Registrar, or by any successor Registrar, in the Borough of Manhattan,  the City
of New York, duly endorsed or accompanied by a written instrument of transfer in
form  satisfactory  to the  Trustee  and  the  Registrar  duly  executed  by the
Certificateholder hereof or such Certificateholder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized  denominations
evidencing the same aggregate Fractional Undivided Interest in the Trust will be
issued to the designated transferee or transferees.

                  The Certificates are issuable only as registered  Certificates
without  coupons in  minimum  denominations  of  $100,000  Fractional  Undivided
Interest and integral multiples of $1,000 in excess thereof.  As provided in the
Agreement and subject to certain limitations therein set forth, the Certificates
are exchangeable for new Certificates of authorized denominations evidencing the
same aggregate  Fractional  Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.


<PAGE>


                                       A-5










179212.3/NYL2



<PAGE>


                                      A-11










179212.3/NYL2
                  No service  charge will be made for any such  registration  of
transfer or exchange,  but the Trustee shall require  payment by the Holder of a
sum  sufficient to cover any tax or  governmental  charge  payable in connection
therewith.

                  The Trustee,  the  Registrar,  and any agent of the Trustee or
the Registrar may treat the person in whose name this  Certificate is registered
as the owner hereof for all purposes,  and neither the Trustee,  the  Registrar,
nor any such agent shall be affected by any notice to the contrary.

                  The obligations and responsibilities  created by the Agreement
and  the  Trust  created  thereby  shall  terminate  upon  the  distribution  to
Certificateholders of all amounts required to be distributed to them pursuant to
the  Agreement  and the  disposition  of all property  held as part of the Trust
Property.




<PAGE>


                             FORM OF TRANSFER NOTICE


                  FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and
transfer(s) unto

Insert Taxpayer Identification No.



please print or typewrite name and address including zip code of assignee


the within Certificate and all rights thereunder, hereby irrevocably constituting and appointing


attorney  to transfer  said  Certificate  on the books of the Trustee  with full
power of substitution in the premises.


                     [THE FOLLOWING PROVISION TO BE INCLUDED
                               ON ALL CERTIFICATES
                      EXCEPT PERMANENT OFFSHORE GLOBAL AND
                         OFFSHORE PHYSICAL CERTIFICATES]

                  In connection with any transfer of this Certificate  occurring
prior to __________, the undersigned confirms that without utilizing any general
solicitation or general advertising that:

                                   [Check One]

[                 ] (a) this Certificate is being transferred in compliance with
                  the exemption  from  registration  under the Securities Act of
                  1933, as amended, provided by Rule 144A thereunder.

                                       or

[                 ] (b) this  Certificate  is being  transferred  other  than in
                  accordance  with (a) above and documents  are being  furnished
                  that comply with the  conditions of transfer set forth in this
                  Certificate and the Agreement.

If neither of the  foregoing  boxes is checked,  the Trustee or other  Registrar
shall not be obligated to register  this  Certificate  in the name of any Person
other  than the  Holder  hereof  unless  and  until the  conditions  to any such
transfer of  registration  set forth herein and in Section 3.06 of the Agreement
shall have been satisfied.


Date:                                                [Name of Transferor]

                                                           NOTE:  The  signature
                                                           must  correspond with
                                                           the  name as  written
                                                           upon  the face of the
                                                           within-mentioned
                                                           instrument  in  every
                                                           particular,   without
                                                           alteration   or   any
                                                           change whatsoever.

Signature Guarantee:

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

                The  undersigned  represents  and warrants that it is purchasing
this  Certificate  for its own  account or an account  with  respect to which it
exercises  sole  investment  discretion  and that it and any such  account  is a
"qualified  institutional  buyer"  within  the  meaning  of Rule 144A  under the
Securities  Act of 1933,  as amended,  and is aware that the sale to it is being
made in  reliance  on Rule  144A  and  acknowledges  that it has  received  such
information  regarding the Company as the undersigned has requested  pursuant to
Rule 144A or has determined not to request such information and that it is aware
that the transferor is relying upon the undersigned's foregoing  representations
in order to claim the exemption from registration provided by Rule 144A.


Dated:
                                                           NOTE:      To be executed by an executive
                                                                      officer.



<PAGE>



                                       A-7










179212.3/NYL2
179212.3/NYL2










179212.3/NYL2
                                                                                                         EXHIBIT B


<PAGE>


                                      A-13










179212.3/NYL2

                 FORM OF CERTIFICATE FOR UNLEGENDED CERTIFICATES


                                                                                        [Date]

[Name and address of Trustee]


Attention:  Corporate Trust Department


                           Re:      Atlantic Coast Airlines 1997-1A Pass Through Trust, ___%
                                    Atlantic Coast Airlines Pass Through Certificates Series
                                    1997-1A (the "Certificates")

Dear Sirs:

                  This letter relates to U.S.  $__________  Fractional Undivided
Interest  of   Certificates   represented   by  a  Certificate   (the  "Legended
Certificate") which bears a legend outlining  restrictions upon transfer of such
Legended  Certificate.  Pursuant  to  Section  3.01 of the  Pass  Through  Trust
Agreement relating to the Certificates dated as of September 25,1997 (the "Trust
Agreement"),  among Atlantic Coast Airlines  ("ACA"),  Atlantic Coast  Airlines,
Inc.  ("ACAI")  and you,  we  hereby  certify  that we are (or we will hold such
securities  on  behalf  of) a  person  outside  the  United  States  to whom the
Certificates  could be transferred  in accordance  with Rule 904 of Regulation S
promulgated under the U.S. Securities Act of 1933, as amended.  Accordingly, you
are hereby  requested  to exchange the legended  certificate  for an  unlegended
certificate  representing an identical principal amount of Certificates,  all in
the manner provided for in the Trust Agreement.

                  You,  ACA and ACAI are  entitled  to rely upon this letter and
are  irrevocably  authorized  to  produce  this  letter or a copy  hereof to any
interested party in any  administrative or legal proceedings or official inquiry
with respect to the matters covered hereby.  Terms used in this certificate have
the meanings set forth in Regulation S.

                                                     Very truly yours,

                                                     [Name of Certificateholder]


                                                                       By:
                                                                                Authorized Signature


<PAGE>



                                       C-1










179212.3/NYL2
179212.3/NYL2










179212.3/NYL2
                                                                                                          EXHIBIT C


<PAGE>


                                       C-2


179212.3/NYL2


                            FORM OF CERTIFICATE TO BE DELIVERED IN CONNECTION
                                 WITH TRANSFERS PURSUANT TO REGULATION S


                                                                                        [date]



[Name and address of Trustee]


Attention:  Corporate Trust Department


                           Re:      Atlantic Coast Airlines 1997-1A Pass Through Trust
                                    (the "Trust"), 7.20% Atlantic Coast Airlines Pass Through
                Certificates Series 1997-1A (the "Certificates")

Sirs:

                  In connection  with our proposed  sale of $_______  Fractional
Undivided  Interest  of the  Certificates,  we  confirm  that such sale has been
effected  pursuant to and in accordance  with  Regulation S under the Securities
Act of 1933, as amended, and, accordingly, we represent that:

                  (1)      the offer of the Certificates was not made to a person in the United States;

                  (2) either (a) at the time the buy order was  originated,  the
         transferee was outside the United States or we and any person acting on
         our behalf  reasonably  believed  that the  transferee  was outside the
         United States or (b) the transaction was executed in, on or through the
         facilities of a designated  off-shore  securities market and neither we
         nor any person acting on our behalf knows that the transaction has been
         pre-arranged with a buyer in the United States;

                  (3) no directed  selling  efforts have been made in the United
         States in  contravention  of the  requirements  of Rule  903(b) or Rule
         904(b) of Regulation S, as applicable; and

                  (4) the  transaction  is not part of a plan or scheme to evade
         the registration requirements of the Securities Act.

                  In addition,  if the sale is made during a  restricted  period
and the  provisions  of Rule  903(c)(3) or Rule  904(c)(1)  of  Regulation S are
applicable  thereto,  we confirm that such sale has been made in accordance with
the applicable  provisions of Rule 903(c)(3) or Rule 904(c)(1),  as the case may
be.

                  You, Atlantic Coast Airlines and Atlantic Coast Airlines, Inc.
are entitled to rely upon this letter and are irrevocably  authorized to produce
this letter or a copy hereof to any interested  party in any  administrative  or
legal  proceedings  or official  inquiry  with  respect to the  matters  covered
hereby. Terms used in this certificate have the meanings set forth in Regulation
S.

                                                              Very truly yours,

                                                              [Name of Transferor]


                                                              By:_______________________
                                                                        Authorized Signature


<PAGE>



                                       D-1


                                                                                               EXHIBIT D


<PAGE>
                                       D-3












                            FORM OF CERTIFICATE TO BE
                          DELIVERED IN CONNECTION WITH
                    TRANSFERS TO NON-QIB ACCREDITED INVESTORS

                                                                                                        [date]


[Name and address of Trustee]


Attention:  Corporate Trust Department


                  Re:      Atlantic Coast Airlines 1997-1A Pass-Through
                           Trust (the "Trust"), 7.20% Atlantic Coast Airlines
                           Pass Through Certificates Series 1997-1A
                           (the "Certificates")

Dear Sirs:

                  In connection with our proposed  purchase of  $_______________
aggregate principal amount of the Certificates, we confirm that:

                  1.  We  understand   that  any  subsequent   transfer  of  the
         Certificates  is subject to certain  restrictions  and  conditions  set
         forth in the Pass Through  Trust  Agreement  dated as of September  25,
         1997 relating to the Certificates  (the "Pass Through Trust Agreement")
         and the undersigned agrees to be bound by, and not to resell, pledge or
         otherwise  transfer the  Certificates  except in compliance  with, such
         restrictions  and conditions and the Securities Act of 1933, as amended
         (the "Securities Act").

                  2.  We  are  purchasing   Certificates   having  an  aggregate
         principal  amount of not less than  $100,000  and each account (if any)
         for which we are  purchasing  Certificates  is purchasing  Certificates
         having an aggregate principal amount of not less than $100,000.

                  3.  We  understand  that  the   Certificates   have  not  been
         registered  under the Securities Act, and that the Certificates may not
         be offered or sold except as permitted in the  following  sentence.  We
         agree, on our own behalf and on behalf of any accounts for which we are
         acting as hereinafter  stated,  that if we should sell any Certificate,
         we  will  do so  only  (A) in  accordance  with  Rule  144A  under  the
         Securities  Act  to  a  "qualified  institutional  buyer"  (as  defined
         therein),  (B) to an  institutional  "accredited  investor" (as defined
         below)  that,  prior to such  transfer,  furnishes  to you and Atlantic
         Coast Airlines, Inc., a signed letter substantially in the form of this
         letter,  (C) outside the United States in  accordance  with Rule 904 of
         Regulation S under the  Securities  Act, (D) pursuant to the  exemption
         from registration provided by Rule 144 under the Securities Act, or (E)
         pursuant to an effective  registration  statement  under the Securities
         Act, and we further  agree to provide to any person  purchasing  any of
         the Certificates  from us a notice advising such purchaser that resales
         of the Notes are  restricted as stated  herein.  We further  understand
         that  the  Certificates  purchased  by us  will  bear a  legend  to the
         foregoing effect.

                  4.  We  understand   that,  on  any  proposed  resale  of  any
         Certificates,  we will be  required to furnish to you,  Atlantic  Coast
         Airlines  ("ACA") and  Atlantic  Coast  Airlines,  Inc.  ("ACAI")  such
         certifications,  legal  opinions and other  information as you, ACA and
         ACAI may reasonably  require to confirm that the proposed sale complies
         with  the  foregoing  restrictions.  We  further  understand  that  the
         Certificates  purchased  by us  will  bear a  legend  to the  foregoing
         effect.

                  5. We are an institutional  "accredited  investor" (as defined
         in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities
         Act) and have such  knowledge and  experience in financial and business
         matters  as to be  capable  of  evaluating  the merits and risks of our
         investment in the Certificates and we and any accounts for which we are
         acting  are  each  able  to  bear  the  economic  risk  of  our  or its
         investment.

                  6. We are acquiring the  Certificates  purchased by us for our
         own  account  or  for  one  or  more  accounts  (each  of  which  is an
         institutional  "accredited  investor")  as to each of which we exercise
         sole investment discretion.

                  You,  ACA and ACAI are  entitled  to rely upon this letter and
are  irrevocably  authorized  to  produce  this  letter or a copy  hereof to any
interested party in any  administrative or legal proceedings or official inquiry
with respect to the matters covered hereby.

                                                              Very truly yours,

                                                              [Name of Transferor]


                                                              By:
                                                                   Authorized Signature


<PAGE>













179212.3/NYL2



<PAGE>













179212.3/NYL2










                                       PASS THROUGH TRUST AGREEMENT

                         Dated as of September 25, 1997


                                      among


                            ATLANTIC COAST AIRLINES,

                          ATLANTIC COAST AIRLINES, INC.


                                       and


                       THE FIRST NATIONAL BANK OF MARYLAND

                                   as Trustee





                            Atlantic Coast Airlines 1997-1A Pass Through Trust

                                 7.20% 1997-1A Pass Through Certificates









<PAGE>



                                                         5



         Section                                                                                               Page









179212.3/NYL2
179212.3/NYL2










179212.3/NYL2
                                TABLE OF CONTENTS


<PAGE>




         Section                                                                                               Page

         ARTICLE I

                                   DEFINITIONS

    1.01.  Definitions..........................................................................................  2
           -----------
    1.02.  Compliance Certificates and Opinions................................................................. 12
           ------------------------------------
    1.03.  Form of Documents Delivered to Trustee............................................................... 13
           --------------------------------------
    1.04.  Acts of Certificateholders........................................................................... 14
           --------------------------

         ARTICLE II

                       ORIGINAL ISSUANCE OF CERTIFICATES;
                         ACQUISITION OF EQUIPMENT NOTES

    2.01.  Issuance of Certificates; Acquisition of Equipment Notes............................................. 15
           --------------------------------------------------------
    2.02.  Acceptance by Trustee................................................................................ 17
           ---------------------
    2.03.  Limitation of Powers................................................................................. 18
           --------------------

         ARTICLE III

                                THE CERTIFICATES

    3.01.  Title, Form, Denomination and Execution of Certificates.............................................. 18
           -------------------------------------------------------
    3.02.  Restrictive Legends.................................................................................. 19
           -------------------
    3.03.  Authentication of Certificates....................................................................... 21
           ------------------------------
    3.04.  Transfer and Exchange................................................................................ 22
           ---------------------
    3.05.  Book-Entry Provisions for U.S. Global Certificate and Offshore Global Certificates................... 22
           ----------------------------------------------------------------------------------
    3.06.  Special Transfer Provisions.......................................................................... 24
           ---------------------------
    3.07.  Mutilated, Destroyed, Lost or Stolen Certificates.................................................... 27
           -------------------------------------------------
    3.08.  Persons Deemed Owners................................................................................ 28
           ---------------------
    3.09.  Cancellation......................................................................................... 28
           ------------
    3.10.  Limitation of Liability for Payments................................................................. 28
           ------------------------------------
    3.11.  Temporary Certificates............................................................................... 28
           ----------------------

         ARTICLE IV

                          DISTRIBUTIONS; STATEMENTS TO
                               CERTIFICATEHOLDERS

    4.01.  Certificate Account and Special Payments Account..................................................... 29
           ------------------------------------------------
    4.02.  Distributions from Certificate Account and Special Payments Account.................................. 29
           -------------------------------------------------------------------
    4.03.  Statements to Certificateholders..................................................................... 31
           --------------------------------
    4.04.  Investment of Special Payment Moneys................................................................. 31
           ------------------------------------

         ARTICLE V

                                   THE COMPANY

    5.01.  Maintenance of Corporate Existence................................................................... 32
           ----------------------------------
    5.02.  Consolidation, Merger, Etc........................................................................... 32
           --------------------------

         ARTICLE VI

                                     DEFAULT

    6.01.  Events of Default.................................................................................... 33
           -----------------
    6.02.  Incidents of Sale of Equipment Notes................................................................. 36
           ------------------------------------
    6.03.  Judicial Proceedings Instituted by Trustee; Trustee May Bring Suit................................... 36
           ------------------------------------------------------------------
    6.04.  Control by Certificateholders........................................................................ 37
           -----------------------------
    6.05.  Waiver of Past Defaults.............................................................................. 37
           -----------------------
    6.06.  Right of Certificateholders to Receive Payments Not to Be Impaired................................... 38
           ------------------------------------------------------------------
    6.07.  Certificateholders May Not Bring Suit Except Under Certain Conditions................................ 38
           ---------------------------------------------------------------------
    6.08.  Remedies Cumulative.................................................................................. 39
           -------------------
    6.09.  Undertaking for Costs................................................................................ 39
           ---------------------

         ARTICLE VII

                                   THE TRUSTEE

    7.01.  Certain Duties and Responsibilities.................................................................. 39
           -----------------------------------
    7.02.  Notice of Defaults................................................................................... 40
           ------------------
    7.03.  Certain Rights of Trustee............................................................................ 40
           -------------------------
    7.04.  Not Responsible for Recitals or Issuance of Certificates............................................. 41
           --------------------------------------------------------
    7.05.  May Hold Certificates................................................................................ 42
           ---------------------
    7.06.  Money Held in Trust.................................................................................. 42
           -------------------
    7.07.  Compensation and Reimbursement....................................................................... 42
           ------------------------------
    7.08.  Corporate Trustee Required; Eligibility.............................................................. 43
           ---------------------------------------
    7.09.  Resignation and Removal; Appointment of Successor.................................................... 44
           -------------------------------------------------
    7.10.  Acceptance of Appointment by Successor............................................................... 45
           --------------------------------------
    7.11.  Merger, Conversion, Consolidation or Succession to Business.......................................... 46
           -----------------------------------------------------------
    7.12.  Maintenance of Agencies.............................................................................. 46
           -----------------------
    7.13.  Money for Certificate Payments to Be Held in Trust................................................... 47
           --------------------------------------------------
    7.14.  Registration of Equipment Notes in Name of Subordination Agent....................................... 47
           --------------------------------------------------------------
    7.15.  Representations and Warranties of Trustee............................................................ 48
           -----------------------------------------
    7.16.  Withholding Taxes; Information Reporting............................................................. 49
           ----------------------------------------
    7.17.  Trustee's Liens...................................................................................... 49
           ---------------
    7.18.  Preferential Collection of Claims.................................................................... 50
           ---------------------------------

         ARTICLE VIII

                CERTIFICATEHOLDERS' LISTS AND REPORTS BY TRUSTEE

    8.01.  The Company to Furnish Trustee with Names and Addresses of Certificateholders........................ 50
           -----------------------------------------------------------------------------
    8.02.  Preservation of Information; Communications to Certificateholders.................................... 50
           -----------------------------------------------------------------
    8.03.  Reports by Trustee................................................................................... 50
           ------------------
    8.04.  Reports by the Guarantor and the Company............................................................. 50
           ----------------------------------------

         ARTICLE IX

                             SUPPLEMENTAL AGREEMENTS

    9.01.  Supplemental Agreements Without Consent of Certificateholders........................................ 52
           -------------------------------------------------------------
    9.02.  Supplemental Agreements with Consent of Certificateholders........................................... 53
           ----------------------------------------------------------
    9.03.  Documents Affecting Immunity or Indemnity............................................................ 54
           -----------------------------------------
    9.04.  Execution of Supplemental Agreements................................................................. 54
           ------------------------------------
    9.05.  Effect of Supplemental Agreements.................................................................... 54
           ---------------------------------
    9.06.  Conformity with Trust Indenture Act.................................................................. 54
           -----------------------------------
    9.07.  Reference in Certificates to Supplemental Agreements................................................. 54
           ----------------------------------------------------

         ARTICLE X

                AMENDMENTS TO INDENTURES AND FINANCING DOCUMENTS

    10.01.  Amendments and Supplements to Indentures and Other Financing Documents.............................. 54
            ----------------------------------------------------------------------

         ARTICLE XI

                              TERMINATION OF TRUST

    11.01.  Termination of the Trust............................................................................ 55
            ------------------------

         ARTICLE XII

                            MISCELLANEOUS PROVISIONS

    12.01.  Limitation on Rights of Certificateholders.......................................................... 56
    12.02.  Certificates Nonassessable and Fully Paid........................................................... 56
    12.03.  Notices 57
    12.04.  Governing Law....................................................................................... 58
            -------------
    12.05.  Severability of Provisions.......................................................................... 58
            --------------------------
    12.06.  Effect of Headings and Table of Contents............................................................ 58
            ----------------------------------------
    12.07.  Successors and Assigns.............................................................................. 58
            ----------------------
    12.08.  Benefits of Agreement............................................................................... 58
            ---------------------
    12.09.  Legal Holidays...................................................................................... 58
            --------------
    12.10.  Counterparts........................................................................................ 59
            ------------
    12.11.  Communication by Certificateholders with Other Certificateholders................................... 59
            -----------------------------------------------------------------

         Schedule 1          -      Indentures
         Schedule 2 -        Financing Agreements


         Exhibit A  -               Form of Certificate
         Exhibit B  -        Form of Certificate for Unlegended Certificates
         Exhibit C  -               Form of Certificate to be Delivered in Connection with
                                    Transfers Pursuant to Regulation S
         Exhibit D  -        Form of Certificate to be Delivered in Connection with
                    Transfers to Non-QIB Accredited Investors


<PAGE>


                                                        17







SS_NYL4/255622 1
</TABLE>

<TABLE>
<S>     <C>     
EXHIBIT 10.50(c)


                             U.S. GLOBAL CERTIFICATE



REGISTERED

No. A-1                                                                                       CUSIP NO. 048395 AA 5


         THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE U.S.  SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND,  ACCORDINGLY,  MAY NOT
         BE OFFERED OR SOLD  WITHIN THE UNITED  STATES OR TO, OR FOR THE ACCOUNT
         OR  BENEFIT  OF,  ANY  PERSONS  EXCEPT  AS SET  FORTH IN THE  FOLLOWING
         SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A)
         IT IS A "QUALIFIED  INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER
         THE SECURITIES ACT), (B) IT IS AN INSTITUTIONAL  "ACCREDITED  INVESTOR"
         (AS DEFINED IN RULE  501(a)(1),  (2), (3) OR (7) OF  REGULATION D UNDER
         THE SECURITIES ACT) (AN "INSTITUTIONAL  ACCREDITED INVESTOR") OR (C) IT
         IS NOT A U.S.  PERSON AND IS ACQUIRING THIS  CERTIFICATE IN AN OFFSHORE
         TRANSACTION IN COMPLIANCE  WITH  REGULATION S UNDER THE SECURITIES ACT;
         (2) AGREES  THAT IT WILL NOT  WITHIN  TWO YEARS  AFTER THE LATER OF THE
         ORIGINAL  ISSUANCE OF THIS  CERTIFICATE  OR THE LAST DATE ON WHICH THIS
         CERTIFICATE  WAS  HELD  BY  ATLANTIC  COAST  AIRLINES  ("ACA")  OR  ANY
         AFFILIATE OF ACA, RESELL OR OTHERWISE  TRANSFER THIS CERTIFICATE EXCEPT
         (A) TO ACA OR ANY SUBSIDIARY THEREOF, (B) INSIDE THE UNITED STATES TO A
         QUALIFIED  INSTITUTIONAL  BUYER IN COMPLIANCE  WITH RULE 144A UNDER THE
         SECURITIES  ACT,  (C)  INSIDE  THE  UNITED  STATES TO AN  INSTITUTIONAL
         ACCREDITED  INVESTOR  ACQUIRING  $100,000 OR MORE  AGGREGATE  PRINCIPAL
         AMOUNT OF SUCH CERTIFICATE  THAT, PRIOR TO SUCH TRANSFER,  FURNISHES TO
         THE TRUSTEE A SIGNED  LETTER  CONTAINING  CERTAIN  REPRESENTATIONS  AND
         AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS CERTIFICATE
         (THE  FORM OF WHICH  LETTER  CAN BE  OBTAINED  FROM THE  TRUSTEE),  (D)
         OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH
         RULE 904 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 AN EFFECTIVE REGISTRATION STATEMENT UNDER
         THE SECURITIES  ACT; AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON
         TO WHOM THIS  CERTIFICATE IS TRANSFERRED A NOTICE  SUBSTANTIALLY TO THE
         EFFECT  OF  THIS  LEGEND.  IN  CONNECTION  WITH  ANY  TRANSFER  OF THIS
         CERTIFICATE  WITHIN TWO YEARS AFTER THE LATER OF THE ORIGINAL  ISSUANCE
         OF THIS CERTIFICATE OR THE LAST DATE ON WHICH THIS CERTIFICATE WAS HELD
         BY ACA OR ANY  AFFILIATE OF ACA, 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 THE TRUSTEE.  IF THE PROPOSED
         TRANSFEREE IS AN INSTITUTIONAL  ACCREDITED  INVESTOR,  THE HOLDER MUST,
         PRIOR  TO  SUCH   TRANSFER,   FURNISH  TO  THE  TRUSTEE  AND  ACA  SUCH
         CERTIFICATIONS,  LEGAL OPINIONS OR OTHER  INFORMATION AS EITHER OF THEM
         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.
         THE PASS THROUGH  TRUST  AGREEMENT  CONTAINS A PROVISION  REQUIRING THE
         TRUSTEE TO REFUSE TO  REGISTER  ANY  TRANSFER  OF THIS  CERTIFICATE  IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
         THE DEPOSITORY TRUST COMPANY,  A NEW YORK CORPORATION  ("DTC"),  TO THE
         TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND  ANY  CERTIFICATE  ISSUED  IN  EXCHANGE  FOR  THIS  CERTIFICATE  IS
         REGISTERED  IN THE  NAME OF  CEDE & CO.  OR IN  SUCH  OTHER  NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL  CERTIFICATE  SHALL BE LIMITED TO TRANSFERS IN
         WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR
         SUCH  SUCCESSOR'S  NOMINEE  AND  TRANSFERS  OF  PORTIONS OF THIS GLOBAL
         CERTIFICATE  SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH THE
         RESTRICTIONS  SET FORTH IN SECTIONS  3.05 AND 3.06 OF THE PASS  THROUGH
         TRUST AGREEMENT REFERRED TO HEREIN.

         ANY PERSON  ACQUIRING THIS PASS THROUGH  CERTIFICATE  WILL BE DEEMED TO
         REPRESENT  AND WARRANT  THAT (i) NO ASSETS OF AN EMPLOYEE  BENEFIT PLAN
         SUBJECT TO TITLE I OF THE EMPLOYEE  RETIREMENT  INCOME  SECURITY ACT OF
         1974, AS AMENDED ("ERISA") OR AN INDIVIDUAL  RETIREMENT ACCOUNT OR PLAN
         SUBJECT TO 4975 OF THE CODE,  OR ANY TRUST  ESTABLISHED  UNDER ANY SUCH
         PLAN OR  ACCOUNT,  HAVE  BEEN USED TO  ACQUIRE  OR HOLD ANY OF THE PASS
         THROUGH  CERTIFICATES  OR  (ii)  THAT  ONE OR  MORE  ADMINISTRATIVE  OR
         STATUTORY  EXEMPTIONS  FROM  THE  PROHIBITED  TRANSACTION  RULES  UNDER
         SECTION  406 OF  ERISA  AND  SECTION  4975 OF THE CODE  APPLIES  TO ITS
         PURCHASE  AND HOLDING OF THIS PASS  THROUGH  CERTIFICATE  SUCH THAT ITS
         PURCHASE AND HOLDING OF THIS PASS THROUGH  CERTIFICATE  WILL NOT RESULT
         IN A NON-EXEMPT  PROHIBITED  TRANSACTION UNDER SECTION 406 OF ERISA AND
         SECTION 4975 OF THE CODE.


<PAGE>




               ATLANTIC COAST AIRLINES 1997-1A PASS THROUGH TRUST

             7.20% Atlantic Coast Airlines Pass Through Certificate
                                 Series 1997-1A

                Final Expected Distribution Date: January 1, 2014

evidencing a  fractional  undivided  interest in a trust,  the property of which
includes certain  equipment notes each secured by an Aircraft leased to or owned
by Atlantic Coast Airlines.


                   $ 57,714,000 Fractional Undivided Interest
           representing .0017327% of the Trust per $1,000 face amount

                  THIS  CERTIFIES  THAT Cede & Co., for value  received,  is the
registered  owner of a $  57,714,000  (Fifty-seven  million,  seven  hundred and
fourteen  thousand  dollars)  Fractional  Undivided  Interest in Atlantic  Coast
Airlines  1997-1A Pass Through  Trust (the "Trust")  created  pursuant to a Pass
Through Trust Agreement, dated as of September 25, 1997 (the "Agreement"), among
The First National Bank of Maryland (the "Trustee"),  Atlantic Coast Airlines, a
corporation incorporated under California law (the "Company") and Atlantic Coast
Airlines, Inc., a corporation incorporated under Delaware law (the "Guarantor"),
a summary of certain of the pertinent provisions of which is set forth below. To
the extent not otherwise defined herein,  the capitalized terms used herein have
the meanings  assigned to them in the Agreement.  This Certificate is one of the
duly authorized  Certificates  designated as "7.20% Atlantic Coast Airlines Pass
Through  Certificates Series 1997-1A" (herein called the  "Certificates").  This
Certificate  is issued  under  and is  subject  to the  terms,  provisions,  and
conditions  of  the  Agreement.   By  virtue  of  its   acceptance   hereof  the
Certificateholder  of this Certificate  assents to and agrees to be bound by the
provisions of the Agreement and the Intercreditor Agreement. The property of the
Trust includes  certain  Equipment  Notes and all rights of the Trust to receive
payments  under the  Intercreditor  Agreement  and the  Liquidity  Facility (the
"Trust Property").  Each issue of the Equipment Notes is secured by, among other
things, a security interest in the Aircraft leased to or owned by the Company.

                  The Certificates  represent  fractional undivided interests in
the Trust and the Trust  Property,  and have no rights,  benefits or interest in
respect of any assets or property other than the Trust Property.

                  Subject to and in  accordance  with the terms of the Agreement
and the Intercreditor Agreement,  from and to the extent of funds then available
to the  Trustee,  there  will be  distributed  on each  January  1 and July 1 (a
"Regular  Distribution  Date"),  commencing on January 1, 1998, to the Person in
whose name this  Certificate  is registered at the close of business on the 15th
day  preceding  the  Regular  Distribution  Date,  an amount in  respect  of the
Scheduled Payments on the Equipment Notes due on such Regular Distribution Date,
the receipt of which has been confirmed by the Trustee,  equal to the product of
the percentage interest in the Trust evidenced by this Certificate and an amount
equal to the sum of such Scheduled  Payments.  Subject to and in accordance with
the terms of the Agreement and the  Intercreditor  Agreement,  in the event that
Special Payments on the Equipment Notes are received by the Trustee,  from funds
then  available to the Trustee,  there shall be  distributed  on the  applicable
Special  Distribution  Date,  to the  Person in whose name this  Certificate  is
registered  at the  close of  business  on the 15th day  preceding  the  Special
Distribution  Date,  an  amount  in  respect  of such  Special  Payments  on the
Equipment Notes,  the receipt of which has been confirmed by the Trustee,  equal
to the  product  of the  percentage  interest  in the  Trust  evidenced  by this
Certificate and an amount equal to the sum of such Special Payments so received.
If a Regular  Distribution  Date or Special  Distribution Date is not a Business
Day,  distribution shall be made on the immediately  following Business Day with
the same  force  and  effect  as if made on such  Regular  Distribution  Date or
Special  Distribution  Date and no interest shall accrue during the  intervening
period.  The Trustee  shall mail notice of each Special  Payment and the Special
Distribution Date therefor to the Certificateholder of this Certificate.

                  Except   as   otherwise   provided   in  the   Agreement   and
notwithstanding  the above,  the final  distribution on this Certificate will be
made after notice mailed by the Trustee of the pendency of such distribution and
only upon presentation and surrender of this Certificate at the office or agency
of the Trustee specified in such notice.

                  THE  AGREEMENT AND THIS  CERTIFICATE  SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS-OF-LAW PRINCIPLES.

                  Reference  is hereby  made to the further  provisions  of this
Certificate set forth in the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.


<PAGE>


                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed.

Dated:  September 25, 1997                                    ATLANTIC COAST AIRLINES
                                                                  1997-1A PASS THROUGH
TRUST

                                                              By:  The First National Bank of Maryland,
                                                                       not in its individual capacity but
                                                                       solely as Trustee


                                                                   By:
                                                                         Name:
                                                                         Title:


<PAGE>


                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION

                    This is one of the Certificates referred
                      to in the within-mentioned Agreement.



                                                              The First National Bank of Maryland,
                                                                  not in its individual capacity but
                                                                  solely as Trustee



                                                                   By:
                                                                                  Authorized Officer



<PAGE>


                            [REVERSE OF CERTIFICATE]


                  The  Certificates do not represent a direct  obligation of, or
an obligation  guaranteed  by, or an interest in, the Company,  the Guarantor or
the Trustee or any of their affiliates. The Certificates are limited in right or
payment,  all as more  specifically  set  forth  on the face  hereof  and in the
Agreement.  All payments or distributions made to  Certificateholders  under the
Agreement shall be made only from the Trust Property and only to the extent that
the Trustee shall have sufficient  income or proceeds from the Trust Property to
make  such  payments  in  accordance  with  the  terms  of the  Agreement.  Each
Certificateholder of this Certificate,  by its acceptance hereof, agrees that it
will look  solely to the  income and  proceeds  from the Trust  Property  to the
extent available for distribution to such  Certificateholder  as provided in the
Agreement.  This  Certificate  does not purport to summarize  the  Agreement and
reference  is  made  to  the  Agreement  for  information  with  respect  to the
interests, rights, benefits, obligations, proceeds, and duties evidenced hereby.
A copy of the Agreement  may be examined  during  normal  business  hours at the
principal office of the Trustee, and at such other places, if any, designated by
the Trustee, by any Certificateholder upon request.

                  The  Agreement   permits,   with  certain  exceptions  therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations   of  the  Company  and  the   Guarantor   and  the  rights  of  the
Certificateholders under the Agreement at any time by the Guarantor, the Company
and the Trustee with the consent of the Certificateholders  holding Certificates
evidencing  Fractional Undivided Interests  aggregating not less than a majority
in  interest in the Trust.  Any such  consent by the  Certificateholder  of this
Certificate shall be conclusive and binding on such  Certificateholder  and upon
all future  Certificateholders of this Certificate and of any Certificate issued
upon the transfer  hereof or in exchange hereof or in lieu hereof whether or not
notation  of such  consent is made upon this  Certificate.  The  Agreement  also
permits the amendment  thereof,  in certain limited  circumstances,  without the
consent of the Certificateholders of any of the Certificates.

                  As   provided  in  the   Agreement   and  subject  to  certain
limitations  therein set forth,  the transfer of this Certificate is registrable
in the Register upon surrender of this  Certificate for registration of transfer
at the  offices  or  agencies  maintained  by the  Trustee  in its  capacity  as
Registrar, or by any successor Registrar, in the Borough of Manhattan,  the City
of New York, duly endorsed or accompanied by a written instrument of transfer in
form  satisfactory  to the  Trustee  and  the  Registrar  duly  executed  by the
Certificateholder hereof or such Certificateholder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized  denominations
evidencing the same aggregate Fractional Undivided Interest in the Trust will be
issued to the designated transferee or transferees.

                  The Certificates are issuable only as registered  Certificates
without  coupons in  minimum  denominations  of  $100,000  Fractional  Undivided
Interest and integral multiples of $1,000 in excess thereof.  As provided in the
Agreement and subject to certain limitations therein set forth, the Certificates
are exchangeable for new Certificates of authorized denominations evidencing the
same aggregate  Fractional  Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.


<PAGE>


                  No service  charge will be made for any such  registration  of
transfer or exchange,  but the Trustee shall require  payment by the Holder of a
sum  sufficient to cover any tax or  governmental  charge  payable in connection
therewith.

                  The Trustee,  the  Registrar,  and any agent of the Trustee or
the Registrar may treat the person in whose name this  Certificate is registered
as the owner hereof for all purposes,  and neither the Trustee,  the  Registrar,
nor any such agent shall be affected by any notice to the contrary.

                  The obligations and responsibilities  created by the Agreement
and  the  Trust  created  thereby  shall  terminate  upon  the  distribution  to
Certificateholders of all amounts required to be distributed to them pursuant to
the  Agreement  and the  disposition  of all property  held as part of the Trust
Property.




<PAGE>


                             FORM OF TRANSFER NOTICE


                  FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and
transfer(s) unto

Insert Taxpayer Identification No.



please print or typewrite name and address including zip code of assignee


the within Certificate and all rights thereunder, hereby irrevocably constituting and appointing


attorney  to transfer  said  Certificate  on the books of the Trustee  with full
power of substitution in the premises.

                  In connection with any transfer of this Certificate  occurring
prior to __________, the undersigned confirms that without utilizing any general
solicitation or general advertising that:

                                   [Check One]

[                 ] (a) this Certificate is being transferred in compliance with
                  the exemption  from  registration  under the Securities Act of
                  1933, as amended, provided by Rule 144A thereunder.

                                       or

[                 ] (b) this  Certificate  is being  transferred  other  than in
                  accordance  with (a) above and documents  are being  furnished
                  that comply with the  conditions of transfer set forth in this
                  Certificate and the Agreement.

If neither of the  foregoing  boxes is checked,  the Trustee or other  Registrar
shall not be obligated to register  this  Certificate  in the name of any Person
other  than the  Holder  hereof  unless  and  until the  conditions  to any such
transfer of  registration  set forth herein and in Section 3.06 of the Agreement
shall have been satisfied.


Date:                                                [Name of Transferor]

                                                           NOTE:  The  signature
                                                           must  correspond with
                                                           the  name as  written
                                                           upon  the face of the
                                                           within-mentioned
                                                           instrument  in  every
                                                           particular,   without
                                                           alteration   or   any
                                                           change whatsoever.

Signature Guarantee:

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

                The  undersigned  represents  and warrants that it is purchasing
this  Certificate  for its own  account or an account  with  respect to which it
exercises  sole  investment  discretion  and that it and any such  account  is a
"qualified  institutional  buyer"  within  the  meaning  of Rule 144A  under the
Securities  Act of 1933,  as amended,  and is aware that the sale to it is being
made in  reliance  on Rule  144A  and  acknowledges  that it has  received  such
information  regarding the Company as the undersigned has requested  pursuant to
Rule 144A or has determined not to request such information and that it is aware
that the transferor is relying upon the undersigned's foregoing  representations
in order to claim the exemption from registration provided by Rule 144A.


Dated:
                                            NOTE:    To be executed by an executive officer.




<PAGE>


                                                        24







SS_NYL4/255613 1


                      TEMPORARY OFFSHORE GLOBAL CERTIFICATE



REGISTERED

No. A-2                                                                                        CINS NO. U04852 AA 4


         THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER THE U.S.  SECURITIES ACT
         OF 1933, AS AMENDED (THE "SECURITIES ACT"), AND,  ACCORDINGLY,  MAY NOT
         BE OFFERED OR SOLD  WITHIN THE UNITED  STATES OR TO, OR FOR THE ACCOUNT
         OR  BENEFIT  OF,  ANY  PERSONS  EXCEPT  AS SET  FORTH IN THE  FOLLOWING
         SENTENCE. BY ITS ACQUISITION HEREOF, THE HOLDER (1) REPRESENTS THAT (A)
         IT IS A "QUALIFIED  INSTITUTIONAL BUYER" (AS DEFINED IN RULE 144A UNDER
         THE SECURITIES ACT), (B) IT IS AN INSTITUTIONAL  "ACCREDITED  INVESTOR"
         (AS DEFINED IN RULE  501(a)(1),  (2), (3) OR (7) OF  REGULATION D UNDER
         THE SECURITIES ACT) (AN "INSTITUTIONAL  ACCREDITED INVESTOR") OR (C) IT
         IS NOT A U.S.  PERSON AND IS ACQUIRING THIS  CERTIFICATE IN AN OFFSHORE
         TRANSACTION IN COMPLIANCE  WITH  REGULATION S UNDER THE SECURITIES ACT;
         (2) AGREES  THAT IT WILL NOT  WITHIN  TWO YEARS  AFTER THE LATER OF THE
         ORIGINAL  ISSUANCE OF THIS  CERTIFICATE  OR THE LAST DATE ON WHICH THIS
         CERTIFICATE  WAS  HELD  BY  ATLANTIC  COAST  AIRLINES  ("ACA")  OR  ANY
         AFFILIATE OF ACA, RESELL OR OTHERWISE  TRANSFER THIS CERTIFICATE EXCEPT
         (A) TO ACA OR ANY SUBSIDIARY THEREOF, (B) INSIDE THE UNITED STATES TO A
         QUALIFIED  INSTITUTIONAL  BUYER IN COMPLIANCE  WITH RULE 144A UNDER THE
         SECURITIES  ACT,  (C)  INSIDE  THE  UNITED  STATES TO AN  INSTITUTIONAL
         ACCREDITED  INVESTOR  ACQUIRING  $100,000 OR MORE  AGGREGATE  PRINCIPAL
         AMOUNT OF SUCH CERTIFICATE  THAT, PRIOR TO SUCH TRANSFER,  FURNISHES TO
         THE TRUSTEE A SIGNED  LETTER  CONTAINING  CERTAIN  REPRESENTATIONS  AND
         AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THIS CERTIFICATE
         (THE  FORM OF WHICH  LETTER  CAN BE  OBTAINED  FROM THE  TRUSTEE),  (D)
         OUTSIDE THE UNITED STATES IN AN OFFSHORE TRANSACTION IN COMPLIANCE WITH
         RULE 904 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 AN EFFECTIVE REGISTRATION STATEMENT UNDER
         THE SECURITIES  ACT; AND (3) AGREES THAT IT WILL DELIVER TO EACH PERSON
         TO WHOM THIS  CERTIFICATE IS TRANSFERRED A NOTICE  SUBSTANTIALLY TO THE
         EFFECT  OF  THIS  LEGEND.  IN  CONNECTION  WITH  ANY  TRANSFER  OF THIS
         CERTIFICATE  WITHIN TWO YEARS AFTER THE LATER OF THE ORIGINAL  ISSUANCE
         OF THIS CERTIFICATE OR THE LAST DATE ON WHICH THIS CERTIFICATE WAS HELD
         BY ACA OR ANY  AFFILIATE OF ACA, 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 THE TRUSTEE.  IF THE PROPOSED
         TRANSFEREE IS AN INSTITUTIONAL  ACCREDITED  INVESTOR,  THE HOLDER MUST,
         PRIOR  TO  SUCH   TRANSFER,   FURNISH  TO  THE  TRUSTEE  AND  ACA  SUCH
         CERTIFICATIONS,  LEGAL OPINIONS OR OTHER  INFORMATION AS EITHER OF THEM
         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.
         THE PASS THROUGH  TRUST  AGREEMENT  CONTAINS A PROVISION  REQUIRING THE
         TRUSTEE TO REFUSE TO  REGISTER  ANY  TRANSFER  OF THIS  CERTIFICATE  IN
         VIOLATION OF THE FOREGOING RESTRICTIONS.

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
         THE DEPOSITORY TRUST COMPANY,  A NEW YORK CORPORATION  ("DTC"),  TO THE
         TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND  ANY  CERTIFICATE  ISSUED  IN  EXCHANGE  FOR  THIS  CERTIFICATE  IS
         REGISTERED  IN THE  NAME OF  CEDE & CO.  OR IN  SUCH  OTHER  NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL  CERTIFICATE  SHALL BE LIMITED TO TRANSFERS IN
         WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR
         SUCH  SUCCESSOR'S  NOMINEE  AND  TRANSFERS  OF  PORTIONS OF THIS GLOBAL
         CERTIFICATE  SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH THE
         RESTRICTIONS  SET FORTH IN SECTIONS  3.05 AND 3.06 OF THE PASS  THROUGH
         TRUST AGREEMENT REFERRED TO HEREIN.

         ANY PERSON  ACQUIRING THIS PASS THROUGH  CERTIFICATE  WILL BE DEEMED TO
         REPRESENT  AND WARRANT  THAT (i) NO ASSETS OF AN EMPLOYEE  BENEFIT PLAN
         SUBJECT TO TITLE I OF THE EMPLOYEE  RETIREMENT  INCOME  SECURITY ACT OF
         1974, AS AMENDED ("ERISA") OR AN INDIVIDUAL  RETIREMENT ACCOUNT OR PLAN
         SUBJECT TO 4975 OF THE CODE,  OR ANY TRUST  ESTABLISHED  UNDER ANY SUCH
         PLAN OR  ACCOUNT,  HAVE  BEEN USED TO  ACQUIRE  OR HOLD ANY OF THE PASS
         THROUGH  CERTIFICATES  OR  (ii)  THAT  ONE OR  MORE  ADMINISTRATIVE  OR
         STATUTORY  EXEMPTIONS  FROM  THE  PROHIBITED  TRANSACTION  RULES  UNDER
         SECTION  406 OF  ERISA  AND  SECTION  4975 OF THE CODE  APPLIES  TO ITS
         PURCHASE  AND HOLDING OF THIS PASS  THROUGH  CERTIFICATE  SUCH THAT ITS
         PURCHASE AND HOLDING OF THIS PASS THROUGH  CERTIFICATE  WILL NOT RESULT
         IN A NON-EXEMPT  PROHIBITED  TRANSACTION UNDER SECTION 406 OF ERISA AND
         SECTION 4975 OF THE CODE.


<PAGE>




               ATLANTIC COAST AIRLINES 1997-1A PASS THROUGH TRUST

             7.20% Atlantic Coast Airlines Pass Through Certificate
                                 Series 1997-1A

                Final Expected Distribution Date: January 1, 2014

evidencing a  fractional  undivided  interest in a trust,  the property of which
includes certain  equipment notes each secured by an Aircraft leased to or owned
by Atlantic Coast Airlines.


                    $57,714,000 Fractional Undivided Interest
           representing .0017327% of the Trust per $1,000 face amount

                  THIS  CERTIFIES  THAT Cede & Co., for value  received,  is the
registered  owner  of a $0  (zero  dollars)  Fractional  Undivided  Interest  in
Atlantic  Coast  Airlines  1997-1A  Pass  Through  Trust (the  "Trust")  created
pursuant to a Pass Through Trust Agreement,  dated as of September 25, 1997 (the
"Agreement"),  among  The  First  National  Bank of  Maryland  (the  "Trustee"),
Atlantic Coast Airlines,  a corporation  incorporated  under California law (the
"Company") and Atlantic Coast Airlines,  Inc., a corporation  incorporated under
Delaware law (the "Guarantor"), a summary of certain of the pertinent provisions
of which is set forth below.  To the extent not otherwise  defined  herein,  the
capitalized  terms  used  herein  have  the  meanings  assigned  to  them in the
Agreement.   This  Certificate  is  one  of  the  duly  authorized  Certificates
designated as "7.20%  Atlantic Coast Airlines Pass Through  Certificates  Series
1997-1A"  (herein called the  "Certificates").  This Certificate is issued under
and is subject to the terms,  provisions,  and conditions of the  Agreement.  By
virtue  of its  acceptance  hereof  the  Certificateholder  of this  Certificate
assents to and agrees to be bound by the  provisions  of the  Agreement  and the
Intercreditor  Agreement.  The property of the Trust includes certain  Equipment
Notes and all rights of the Trust to receive  payments  under the  Intercreditor
Agreement and the Liquidity Facility (the "Trust  Property").  Each issue of the
Equipment  Notes is secured by, among other things,  a security  interest in the
Aircraft leased to or owned by the Company.

                  The Certificates  represent  fractional undivided interests in
the Trust and the Trust  Property,  and have no rights,  benefits or interest in
respect of any assets or property other than the Trust Property.

                  Subject to and in  accordance  with the terms of the Agreement
and the Intercreditor Agreement,  from and to the extent of funds then available
to the  Trustee,  there  will be  distributed  on each  January  1 and July 1 (a
"Regular  Distribution  Date"),  commencing on January 1, 1998, to the Person in
whose name this  Certificate  is registered at the close of business on the 15th
day  preceding  the  Regular  Distribution  Date,  an amount in  respect  of the
Scheduled Payments on the Equipment Notes due on such Regular Distribution Date,
the receipt of which has been confirmed by the Trustee,  equal to the product of
the percentage interest in the Trust evidenced by this Certificate and an amount
equal to the sum of such Scheduled  Payments.  Subject to and in accordance with
the terms of the Agreement and the  Intercreditor  Agreement,  in the event that
Special Payments on the Equipment Notes are received by the Trustee,  from funds
then  available to the Trustee,  there shall be  distributed  on the  applicable
Special  Distribution  Date,  to the  Person in whose name this  Certificate  is
registered  at the  close of  business  on the 15th day  preceding  the  Special
Distribution  Date,  an  amount  in  respect  of such  Special  Payments  on the
Equipment Notes,  the receipt of which has been confirmed by the Trustee,  equal
to the  product  of the  percentage  interest  in the  Trust  evidenced  by this
Certificate and an amount equal to the sum of such Special Payments so received.
If a Regular  Distribution  Date or Special  Distribution Date is not a Business
Day,  distribution shall be made on the immediately  following Business Day with
the same  force  and  effect  as if made on such  Regular  Distribution  Date or
Special  Distribution  Date and no interest shall accrue during the  intervening
period.  The Trustee  shall mail notice of each Special  Payment and the Special
Distribution Date therefor to the Certificateholder of this Certificate.

                  Except   as   otherwise   provided   in  the   Agreement   and
notwithstanding  the above,  the final  distribution on this Certificate will be
made after notice mailed by the Trustee of the pendency of such distribution and
only upon presentation and surrender of this Certificate at the office or agency
of the Trustee specified in such notice.

                  THE  AGREEMENT AND THIS  CERTIFICATE  SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS-OF-LAW PRINCIPLES.

                  Reference  is hereby  made to the further  provisions  of this
Certificate set forth in the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.


<PAGE>


                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed.

Dated:  September 25, 1997                                    ATLANTIC COAST AIRLINES
                                                                  1997-1A               PASS THROUGH
TRUST

                                                              By:  The First National Bank of Maryland,
                                                                       not in its individual capacity but
                                                                       solely as Trustee


                                                                   By:
                                                                         Name:
                                                                         Title:



<PAGE>


                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION


<PAGE>


                                                        26







SS_NYL4/255613 1


                    This is one of the Certificates referred
                      to in the within-mentioned Agreement.



                                                              The First National Bank of Maryland,
                                                                  not in its individual capacity but
                                                                  solely as Trustee



                                                                   By:
                                                                                  Authorized Officer



<PAGE>


                            [REVERSE OF CERTIFICATE]


                  The  Certificates do not represent a direct  obligation of, or
an obligation  guaranteed  by, or an interest in, the Company,  the Guarantor or
the Trustee or any of their affiliates. The Certificates are limited in right or
payment,  all as more  specifically  set  forth  on the face  hereof  and in the
Agreement.  All payments or distributions made to  Certificateholders  under the
Agreement shall be made only from the Trust Property and only to the extent that
the Trustee shall have sufficient  income or proceeds from the Trust Property to
make  such  payments  in  accordance  with  the  terms  of the  Agreement.  Each
Certificateholder of this Certificate,  by its acceptance hereof, agrees that it
will look  solely to the  income and  proceeds  from the Trust  Property  to the
extent available for distribution to such  Certificateholder  as provided in the
Agreement.  This  Certificate  does not purport to summarize  the  Agreement and
reference  is  made  to  the  Agreement  for  information  with  respect  to the
interests, rights, benefits, obligations, proceeds, and duties evidenced hereby.
A copy of the Agreement  may be examined  during  normal  business  hours at the
principal office of the Trustee, and at such other places, if any, designated by
the Trustee, by any Certificateholder upon request.

                  The  Agreement   permits,   with  certain  exceptions  therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations   of  the  Company  and  the   Guarantor   and  the  rights  of  the
Certificateholders under the Agreement at any time by the Guarantor, the Company
and the Trustee with the consent of the Certificateholders  holding Certificates
evidencing  Fractional Undivided Interests  aggregating not less than a majority
in  interest in the Trust.  Any such  consent by the  Certificateholder  of this
Certificate shall be conclusive and binding on such  Certificateholder  and upon
all future  Certificateholders of this Certificate and of any Certificate issued
upon the transfer  hereof or in exchange hereof or in lieu hereof whether or not
notation  of such  consent is made upon this  Certificate.  The  Agreement  also
permits the amendment  thereof,  in certain limited  circumstances,  without the
consent of the Certificateholders of any of the Certificates.

                  As   provided  in  the   Agreement   and  subject  to  certain
limitations  therein set forth,  the transfer of this Certificate is registrable
in the Register upon surrender of this  Certificate for registration of transfer
at the  offices  or  agencies  maintained  by the  Trustee  in its  capacity  as
Registrar, or by any successor Registrar, in the Borough of Manhattan,  the City
of New York, duly endorsed or accompanied by a written instrument of transfer in
form  satisfactory  to the  Trustee  and  the  Registrar  duly  executed  by the
Certificateholder hereof or such Certificateholder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized  denominations
evidencing the same aggregate Fractional Undivided Interest in the Trust will be
issued to the designated transferee or transferees.

                  The Certificates are issuable only as registered  Certificates
without  coupons in  minimum  denominations  of  $100,000  Fractional  Undivided
Interest and integral multiples of $1,000 in excess thereof.  As provided in the
Agreement and subject to certain limitations therein set forth, the Certificates
are exchangeable for new Certificates of authorized denominations evidencing the
same aggregate  Fractional  Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.


<PAGE>


                                                        29










SS_NYL4/255613 1



<PAGE>


                  No service  charge will be made for any such  registration  of
transfer or exchange,  but the Trustee shall require  payment by the Holder of a
sum  sufficient to cover any tax or  governmental  charge  payable in connection
therewith.

                  The Trustee,  the  Registrar,  and any agent of the Trustee or
the Registrar may treat the person in whose name this  Certificate is registered
as the owner hereof for all purposes,  and neither the Trustee,  the  Registrar,
nor any such agent shall be affected by any notice to the contrary.

                  The obligations and responsibilities  created by the Agreement
and  the  Trust  created  thereby  shall  terminate  upon  the  distribution  to
Certificateholders of all amounts required to be distributed to them pursuant to
the  Agreement  and the  disposition  of all property  held as part of the Trust
Property.




<PAGE>


                             FORM OF TRANSFER NOTICE


                  FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and
transfer(s) unto

Insert Taxpayer Identification No.



please print or typewrite name and address including zip code of assignee


the within Certificate and all rights thereunder, hereby irrevocably constituting and appointing


attorney  to transfer  said  Certificate  on the books of the Trustee  with full
power of substitution in the premises.

                  In connection with any transfer of this Certificate  occurring
prior to __________, the undersigned confirms that without utilizing any general
solicitation or general advertising that:

                                   [Check One]

[                 ] (a) this Certificate is being transferred in compliance with
                  the exemption  from  registration  under the Securities Act of
                  1933, as amended, provided by Rule 144A thereunder.

                                       or

[                 ] (b) this  Certificate  is being  transferred  other  than in
                  accordance  with (a) above and documents  are being  furnished
                  that comply with the  conditions of transfer set forth in this
                  Certificate and the Agreement.

If neither of the  foregoing  boxes is checked,  the Trustee or other  Registrar
shall not be obligated to register  this  Certificate  in the name of any Person
other  than the  Holder  hereof  unless  and  until the  conditions  to any such
transfer of  registration  set forth herein and in Section 3.06 of the Agreement
shall have been satisfied.



<PAGE>


Date:                                                [Name of Transferor]

                                                           NOTE:  The  signature
                                                           must  correspond with
                                                           the  name as  written
                                                           upon  the face of the
                                                           within-mentioned
                                                           instrument  in  every
                                                           particular,   without
                                                           alteration   or   any
                                                           change whatsoever.

Signature Guarantee:

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

                The  undersigned  represents  and warrants that it is purchasing
this  Certificate  for its own  account or an account  with  respect to which it
exercises  sole  investment  discretion  and that it and any such  account  is a
"qualified  institutional  buyer"  within  the  meaning  of Rule 144A  under the
Securities  Act of 1933,  as amended,  and is aware that the sale to it is being
made in  reliance  on Rule  144A  and  acknowledges  that it has  received  such
information  regarding the Company as the undersigned has requested  pursuant to
Rule 144A or has determined not to request such information and that it is aware
that the transferor is relying upon the undersigned's foregoing  representations
in order to claim the exemption from registration provided by Rule 144A.


Dated:
                                                           NOTE:      To be executed by an executive
                                                                      officer.



<PAGE>


                                                        34







SS_NYL4/255870 1

                      PERMANENT OFFSHORE GLOBAL CERTIFICATE



REGISTERED

No. A-3                                                                                        CINS NO. U04852 AA 4

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
         THE DEPOSITORY TRUST COMPANY,  A NEW YORK CORPORATION  ("DTC"),  TO THE
         TRUSTEE OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
         AND  ANY  CERTIFICATE  ISSUED  IN  EXCHANGE  FOR  THIS  CERTIFICATE  IS
         REGISTERED  IN THE  NAME OF  CEDE & CO.  OR IN  SUCH  OTHER  NAME AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF DTC (AND  ANY  PAYMENT
         HEREON IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY
         AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE
         HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  INASMUCH
         AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

         TRANSFERS OF THIS GLOBAL  CERTIFICATE  SHALL BE LIMITED TO TRANSFERS IN
         WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR
         SUCH  SUCCESSOR'S  NOMINEE  AND  TRANSFERS  OF  PORTIONS OF THIS GLOBAL
         CERTIFICATE  SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE  WITH THE
         RESTRICTIONS  SET FORTH IN SECTIONS  3.05 AND 3.06 OF THE PASS  THROUGH
         TRUST AGREEMENT REFERRED TO HEREIN.

         ANY PERSON  ACQUIRING THIS PASS THROUGH  CERTIFICATE  WILL BE DEEMED TO
         REPRESENT  AND WARRANT  THAT (i) NO ASSETS OF AN EMPLOYEE  BENEFIT PLAN
         SUBJECT TO TITLE I OF THE EMPLOYEE  RETIREMENT  INCOME  SECURITY ACT OF
         1974, AS AMENDED ("ERISA") OR AN INDIVIDUAL  RETIREMENT ACCOUNT OR PLAN
         SUBJECT TO 4975 OF THE CODE,  OR ANY TRUST  ESTABLISHED  UNDER ANY SUCH
         PLAN OR  ACCOUNT,  HAVE  BEEN USED TO  ACQUIRE  OR HOLD ANY OF THE PASS
         THROUGH  CERTIFICATES  OR  (ii)  THAT  ONE OR  MORE  ADMINISTRATIVE  OR
         STATUTORY  EXEMPTIONS  FROM  THE  PROHIBITED  TRANSACTION  RULES  UNDER
         SECTION  406 OF  ERISA  AND  SECTION  4975 OF THE CODE  APPLIES  TO ITS
         PURCHASE  AND HOLDING OF THIS PASS  THROUGH  CERTIFICATE  SUCH THAT ITS
         PURCHASE AND HOLDING OF THIS PASS THROUGH  CERTIFICATE  WILL NOT RESULT
         IN A NON-EXEMPT  PROHIBITED  TRANSACTION UNDER SECTION 406 OF ERISA AND
         SECTION 4975 OF THE CODE.


<PAGE>




               ATLANTIC COAST AIRLINES 1997-1A PASS THROUGH TRUST

             7.20% Atlantic Coast Airlines Pass Through Certificate
                                 Series 1997-1A

                Final Expected Distribution Date: January 1, 2014

evidencing a  fractional  undivided  interest in a trust,  the property of which
includes certain  equipment notes each secured by an Aircraft leased to or owned
by Atlantic Coast Airlines.


                    $57,714,000 Fractional Undivided Interest
           representing .0017327% of the Trust per $1,000 face amount

                  THIS  CERTIFIES  THAT Cede & Co., for value  received,  is the
registered  owner  of a $0  (zero  dollars)  Fractional  Undivided  Interest  in
Atlantic  Coast  Airlines  1997-1A  Pass  Through  Trust (the  "Trust")  created
pursuant to a Pass Through Trust Agreement,  dated as of September 25, 1997 (the
"Agreement"),  among  The  First  National  Bank of  Maryland  (the  "Trustee"),
Atlantic Coast Airlines,  a corporation  incorporated  under California law (the
"Company") and Atlantic Coast Airlines,  Inc., a corporation  incorporated under
Delaware law (the "Guarantor"), a summary of certain of the pertinent provisions
of which is set forth below.  To the extent not otherwise  defined  herein,  the
capitalized  terms  used  herein  have  the  meanings  assigned  to  them in the
Agreement.   This  Certificate  is  one  of  the  duly  authorized  Certificates
designated as "7.20%  Atlantic Coast Airlines Pass Through  Certificates  Series
1997-1A"  (herein called the  "Certificates").  This Certificate is issued under
and is subject to the terms,  provisions,  and conditions of the  Agreement.  By
virtue  of its  acceptance  hereof  the  Certificateholder  of this  Certificate
assents to and agrees to be bound by the  provisions  of the  Agreement  and the
Intercreditor  Agreement.  The property of the Trust includes certain  Equipment
Notes and all rights of the Trust to receive  payments  under the  Intercreditor
Agreement and the Liquidity Facility (the "Trust  Property").  Each issue of the
Equipment  Notes is secured by, among other things,  a security  interest in the
Aircraft leased to or owned by the Company.

                  The Certificates  represent  fractional undivided interests in
the Trust and the Trust  Property,  and have no rights,  benefits or interest in
respect of any assets or property other than the Trust Property.

                  Subject to and in  accordance  with the terms of the Agreement
and the Intercreditor Agreement,  from and to the extent of funds then available
to the  Trustee,  there  will be  distributed  on each  January  1 and July 1 (a
"Regular  Distribution  Date"),  commencing on January 1, 1998, to the Person in
whose name this  Certificate  is registered at the close of business on the 15th
day  preceding  the  Regular  Distribution  Date,  an amount in  respect  of the
Scheduled Payments on the Equipment Notes due on such Regular Distribution Date,
the receipt of which has been confirmed by the Trustee,  equal to the product of
the percentage interest in the Trust evidenced by this Certificate and an amount
equal to the sum of such Scheduled  Payments.  Subject to and in accordance with
the terms of the Agreement and the  Intercreditor  Agreement,  in the event that
Special Payments on the Equipment Notes are received by the Trustee,  from funds
then  available to the Trustee,  there shall be  distributed  on the  applicable
Special  Distribution  Date,  to the  Person in whose name this  Certificate  is
registered  at the  close of  business  on the 15th day  preceding  the  Special
Distribution  Date,  an  amount  in  respect  of such  Special  Payments  on the
Equipment Notes,  the receipt of which has been confirmed by the Trustee,  equal
to the  product  of the  percentage  interest  in the  Trust  evidenced  by this
Certificate and an amount equal to the sum of such Special Payments so received.
If a Regular  Distribution  Date or Special  Distribution Date is not a Business
Day,  distribution shall be made on the immediately  following Business Day with
the same  force  and  effect  as if made on such  Regular  Distribution  Date or
Special  Distribution  Date and no interest shall accrue during the  intervening
period.  The Trustee  shall mail notice of each Special  Payment and the Special
Distribution Date therefor to the Certificateholder of this Certificate.

                  Except   as   otherwise   provided   in  the   Agreement   and
notwithstanding  the above,  the final  distribution on this Certificate will be
made after notice mailed by the Trustee of the pendency of such distribution and
only upon presentation and surrender of this Certificate at the office or agency
of the Trustee specified in such notice.

                  THE  AGREEMENT AND THIS  CERTIFICATE  SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO
CONFLICTS-OF-LAW PRINCIPLES.

                  Reference  is hereby  made to the further  provisions  of this
Certificate set forth in the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.


<PAGE>


                  Unless  the  certificate  of  authentication  hereon  has been
executed by the Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.

                  IN WITNESS WHEREOF, the Trustee has caused this Certificate to
be duly executed.

Dated:  September 25, 1997                                    ATLANTIC COAST AIRLINES
                                                                  1997-1A               PASS THROUGH
TRUST

                                                              By:  The First National Bank of Maryland,
                                                                       not in its individual capacity but
                                                                       solely as Trustee


                                                                   By:
                                                                         Name:
                                                                         Title:



<PAGE>


                     TRUSTEE'S CERTIFICATE OF AUTHENTICATION


<PAGE>


                                                        36







SS_NYL4/255870 1


                    This is one of the Certificates referred
                      to in the within-mentioned Agreement.



                                                              The First National Bank of Maryland,
                                                                  not in its individual capacity but
                                                                  solely as Trustee



                                                                   By:
                                                                                  Authorized Officer



<PAGE>


                            [REVERSE OF CERTIFICATE]


                  The  Certificates do not represent a direct  obligation of, or
an obligation  guaranteed  by, or an interest in, the Company,  the Guarantor or
the Trustee or any of their affiliates. The Certificates are limited in right or
payment,  all as more  specifically  set  forth  on the face  hereof  and in the
Agreement.  All payments or distributions made to  Certificateholders  under the
Agreement shall be made only from the Trust Property and only to the extent that
the Trustee shall have sufficient  income or proceeds from the Trust Property to
make  such  payments  in  accordance  with  the  terms  of the  Agreement.  Each
Certificateholder of this Certificate,  by its acceptance hereof, agrees that it
will look  solely to the  income and  proceeds  from the Trust  Property  to the
extent available for distribution to such  Certificateholder  as provided in the
Agreement.  This  Certificate  does not purport to summarize  the  Agreement and
reference  is  made  to  the  Agreement  for  information  with  respect  to the
interests, rights, benefits, obligations, proceeds, and duties evidenced hereby.
A copy of the Agreement  may be examined  during  normal  business  hours at the
principal office of the Trustee, and at such other places, if any, designated by
the Trustee, by any Certificateholder upon request.

                  The  Agreement   permits,   with  certain  exceptions  therein
provided,  the  amendment  thereof  and  the  modification  of  the  rights  and
obligations   of  the  Company  and  the   Guarantor   and  the  rights  of  the
Certificateholders under the Agreement at any time by the Guarantor, the Company
and the Trustee with the consent of the Certificateholders  holding Certificates
evidencing  Fractional Undivided Interests  aggregating not less than a majority
in  interest in the Trust.  Any such  consent by the  Certificateholder  of this
Certificate shall be conclusive and binding on such  Certificateholder  and upon
all future  Certificateholders of this Certificate and of any Certificate issued
upon the transfer  hereof or in exchange hereof or in lieu hereof whether or not
notation  of such  consent is made upon this  Certificate.  The  Agreement  also
permits the amendment  thereof,  in certain limited  circumstances,  without the
consent of the Certificateholders of any of the Certificates.

                  As   provided  in  the   Agreement   and  subject  to  certain
limitations  therein set forth,  the transfer of this Certificate is registrable
in the Register upon surrender of this  Certificate for registration of transfer
at the  offices  or  agencies  maintained  by the  Trustee  in its  capacity  as
Registrar, or by any successor Registrar, in the Borough of Manhattan,  the City
of New York, duly endorsed or accompanied by a written instrument of transfer in
form  satisfactory  to the  Trustee  and  the  Registrar  duly  executed  by the
Certificateholder hereof or such Certificateholder's attorney duly authorized in
writing, and thereupon one or more new Certificates of authorized  denominations
evidencing the same aggregate Fractional Undivided Interest in the Trust will be
issued to the designated transferee or transferees.

                  The Certificates are issuable only as registered  Certificates
without  coupons in  minimum  denominations  of  $100,000  Fractional  Undivided
Interest and integral multiples of $1,000 in excess thereof.  As provided in the
Agreement and subject to certain limitations therein set forth, the Certificates
are exchangeable for new Certificates of authorized denominations evidencing the
same aggregate  Fractional  Undivided Interest in the Trust, as requested by the
Certificateholder surrendering the same.


<PAGE>


                                                        39










SS_NYL4/255870 1



<PAGE>


                  No service  charge will be made for any such  registration  of
transfer or exchange,  but the Trustee shall require  payment by the Holder of a
sum  sufficient to cover any tax or  governmental  charge  payable in connection
therewith.

                  The Trustee,  the  Registrar,  and any agent of the Trustee or
the Registrar may treat the person in whose name this  Certificate is registered
as the owner hereof for all purposes,  and neither the Trustee,  the  Registrar,
nor any such agent shall be affected by any notice to the contrary.

                  The obligations and responsibilities  created by the Agreement
and  the  Trust  created  thereby  shall  terminate  upon  the  distribution  to
Certificateholders of all amounts required to be distributed to them pursuant to
the  Agreement  and the  disposition  of all property  held as part of the Trust
Property.




<PAGE>


                             FORM OF TRANSFER NOTICE


                  FOR VALUE RECEIVED the undersigned registered holder hereby sell(s), assign(s) and
transfer(s) unto

Insert Taxpayer Identification No.



please print or typewrite name and address including zip code of assignee


the within Certificate and all rights thereunder, hereby irrevocably constituting and appointing


attorney  to transfer  said  Certificate  on the books of the Trustee  with full
power of substitution in the premises.

                  In connection with any transfer of this Certificate  occurring
prior to __________, the undersigned confirms that without utilizing any general
solicitation or general advertising that:

                                   [Check One]

[                 ] (a) this Certificate is being transferred in compliance with
                  the exemption  from  registration  under the Securities Act of
                  1933, as amended, provided by Rule 144A thereunder.

                                       or

[                 ] (b) this  Certificate  is being  transferred  other  than in
                  accordance  with (a) above and documents  are being  furnished
                  that comply with the  conditions of transfer set forth in this
                  Certificate and the Agreement.

If neither of the  foregoing  boxes is checked,  the Trustee or other  Registrar
shall not be obligated to register  this  Certificate  in the name of any Person
other  than the  Holder  hereof  unless  and  until the  conditions  to any such
transfer of  registration  set forth herein and in Section 3.06 of the Agreement
shall have been satisfied.



<PAGE>


Date:                                                [Name of Transferor]

                                                           NOTE:  The  signature
                                                           must  correspond with
                                                           the  name as  written
                                                           upon  the face of the
                                                           within-mentioned
                                                           instrument  in  every
                                                           particular,   without
                                                           alteration   or   any
                                                           change whatsoever.

Signature Guarantee:

TO BE COMPLETED BY PURCHASER IF (a) ABOVE IS CHECKED.

                The  undersigned  represents  and warrants that it is purchasing
this  Certificate  for its own  account or an account  with  respect to which it
exercises  sole  investment  discretion  and that it and any such  account  is a
"qualified  institutional  buyer"  within  the  meaning  of Rule 144A  under the
Securities  Act of 1933,  as amended,  and is aware that the sale to it is being
made in  reliance  on Rule  144A  and  acknowledges  that it has  received  such
information  regarding the Company as the undersigned has requested  pursuant to
Rule 144A or has determined not to request such information and that it is aware
that the transferor is relying upon the undersigned's foregoing  representations
in order to claim the exemption from registration provided by Rule 144A.


Dated:
                                            NOTE:    To be executed by an executive officer



<PAGE>


SS_NYL4/255622 1


- --------
*        Not to be included on the face of the Permanent Offshore Global 
         Certificate.
*        To be included on the face of each Global Certificate.
*        To be included on the face of each Global Certificate.
</TABLE>

<TABLE>
<S>     <C>    <C>    <C>    <C>    <C>    <C>
EXHIBIT 10.50(d)
===================================================================================================================

                             PARTICIPATION AGREEMENT

                    (ATLANTIC COAST AIRLINES TRUST NO. _____)

                         Dated as of September 30, 1997

                                      among

                            ATLANTIC COAST AIRLINES,
                      Lessee and Initial Owner Participant

                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION,
               not in its individual capacity (except as otherwise
               expressly set forth herein) but solely as trustee,
                                  Owner Trustee

                      THE FIRST NATIONAL BANK OF MARYLAND,
               not in its individual capacity (except as otherwise
               expressly set forth herein) but solely as trustee,
                                Indenture Trustee

                      THE FIRST NATIONAL BANK OF MARYLAND,
                              Pass-Through Trustee

                                       and

                       THE FIRST NATIONAL BANK OF MARYLAND
                               Subordination Agent

================================================================================

                        LEVERAGED LEASE OF ONE CANADAIR REGIONAL JET SERIES 200 ER AIRCRAFT
                    SERIAL NO. _____, REGISTRATION NO. _____

===================================================================================================================



<PAGE>





                                TABLE OF CONTENTS

                                                                                                               Page

Initial Recitals..................................................................................................1

ARTICLE 1  DEFINITIONS............................................................................................3


ARTICLE 2  ISSUANCE OF PASS-THROUGH CERTIFICATES; ISSUANCE AND PURCHASE OF CERTIFICATES...........................3

Section 2.01. Transfer of Funds...................................................................................3
Section 2.02.  Certificates.......................................................................................4
Section 2.03. Amendments on Delivery or Transfer Date.............................................................5

ARTICLE 3  PARTICIPATION IN INVESTMENT ON DELIVERY DATE; DELIVERY OF AIRCRAFT.....................................6

Section 3.01. Lessee's Notice of Delivery Date....................................................................6
Section 3.02. Commitments to Participate in Purchase Price........................................................6
Section 3.03.  Reserved...........................................................................................8
Section 3.04.  Reserved...........................................................................................8
Section 3.05. Postponement of Delivery Date.......................................................................8
Section 3.06. Closing.............................................................................................9

ARTICLE 4  CONDITIONS PRECEDENT...................................................................................9

Section 4.01. Conditions Precedent (Certificate Closing Date).....................................................9
Section 4.02. Conditions Precedent (Delivery Date)...............................................................16
Section 4.03. Opinion of Special Aviation Counsel Upon Registration..............................................24

ARTICLE 5  CONDITIONS PRECEDENT TO LESSEE'S OBLIGATIONS..........................................................24

Section 5.01. Conditions Precedent to Lessee's Obligations.......................................................24

ARTICLE 6  LESSEE'S REPRESENTATIONS, WARRANTIES AND COVENANTS....................................................24

Section 6.01. Lessee's Representations and Warranties............................................................24
Section 6.02. Offering by Lessee.................................................................................29
Section 6.03. Certain Covenants of Lessee........................................................................30
Section 6.04. Survival of Representations and Warranties.........................................................36

ARTICLE 7  OTHER PARTIES' REPRESENTATIONS, WARRANTIES AND COVENANTS..............................................36

Section 7.01.  Reserved..........................................................................................36
Section 7.02.  Citizenship.......................................................................................36
Section 7.03.  Concerning Assignment of Interests of Owner Participant...........................................37
Section 7.04. Representations, Covenants and Warranties of      and the Owner Trustee............................37
Section 7.05. Representations, Warranties and Covenants of the Indenture Trustee.................................39
Section 7.06. Indenture Trustee's Notice of Default..............................................................41
Section 7.07. Releases from Indenture............................................................................41
Section 7.08. Covenant of Quiet Enjoyment........................................................................41
Section 7.09.  Pass-Through Trustee's Representations and Warranties.............................................41
Section 7.10. Survival of Representations, Warranties and Covenants..............................................42
Section 7.11. Lessee's Assumption of the Certificates............................................................42
Section 7.12.  Indebtedness of Owner Trustee.....................................................................44
Section 7.13.  Compliance with Trust Agreement, Etc..............................................................44
Section 7.14. Subordination Agent's Representations, Warranties and Covenants....................................45

ARTICLE 8  TAXES.................................................................................................47

Section 8.01.  Lessee's Obligation to Pay Taxes..................................................................47
Section 8.02. After-Tax Basis....................................................................................51
Section 8.03. Time of Payment....................................................................................52
Section 8.04. Contests...........................................................................................52
Section 8.05.  Refunds...........................................................................................54
Section 8.06. Lessee's Reports...................................................................................55
Section 8.07.  Survival of Obligations...........................................................................55
Section 8.08. Payment of Taxes...................................................................................56
Section 8.09.  Reimbursements by Indemnitees Generally...........................................................56
Section 8.10.  Special Indemnity.................................................................................56
Section 8.11.  Verification......................................................................................56

ARTICLE 9  GENERAL INDEMNITY.....................................................................................56

Section 9.01. Generally..........................................................................................56
Section 9.02.  After-Tax Basis...................................................................................60
Section 9.03. Subrogation........................................................................................60
Section 9.04. Notice and Payment.................................................................................60
Section 9.05. Refunds............................................................................................61
Section 9.06. Defense of Claims..................................................................................61
Section 9.07. Survival of Obligations............................................................................62
Section 9.08. Effect of Other Indemnities........................................................................62
Section 9.09. Interest...........................................................................................62
Section 9.10. Special Indemnity..................................................................................62

ARTICLE 10  TRANSACTION COSTS....................................................................................63

Section 10.01. Transaction Costs and Other Costs.................................................................63

ARTICLE 11  SUCCESSOR OWNER TRUSTEE..............................................................................65

Section 11.01. Appointment of Successor Owner Trustee............................................................65

ARTICLE 12  LIABILITIES AND INTERESTS OF THE OWNER PARTICIPANT AND HOLDERS.......................................66

Section 12.01. Liabilities of the Owner Participant..............................................................66
Section 12.02. Interest of Holders of Certificates...............................................................67

ARTICLE 13  OTHER DOCUMENTS......................................................................................67

Section 13.01. Consent of Lessee to Other Documents..............................................................67
Section 13.02. Further Assurances................................................................................67
Section 13.03.  Pass-Through Trustee's and Subordination Agent's Acknowledgment..................................67

ARTICLE 14  NOTICES..............................................................................................68

Section 14.01. Notices...........................................................................................68

ARTICLE 15  REFINANCING/REOPTIMIZATION...........................................................................69

Section 15.01. Refinancing.......................................................................................69
Section 15.02.  Reoptimization...................................................................................72

ARTICLE 16 CONFIDENTIALITY.......................................................................................73

Section 16.01. Confidentiality...................................................................................73

ARTICLE 17  MISCELLANEOUS........................................................................................74

Section 17.01.  Reserved.........................................................................................74
Section 17.02. Collateral Account................................................................................74
Section 17.03. Counterparts......................................................................................75
Section 17.04. No Oral Modifications.............................................................................75
Section 17.05. Captions..........................................................................................75
Section 17.06. Successors and Assigns............................................................................76
Section 17.07. Concerning the Owner Trustee, Indenture Trustee and the Pass-Through Trustee......................76
Section 17.08. Severability......................................................................................76
Section 17.09. Public Release of Information.....................................................................76
Section 17.10. Certain Limitations on Reorganization.............................................................77
Section 17.11. GOVERNING LAW.....................................................................................77
Section 17.12. Section 1110 Compliance...........................................................................77
Section 17.13. Reliance of Liquidity Providers...................................................................77



SCHEDULE I                          Definitions
SCHEDULE II                         Certificate Information
SCHEDULE III                        Debt Portion
SCHEDULE IV                         Mandatory Economic Terms
SCHEDULE V                          Mandatory Document Terms
EXHIBIT A(1)(a)                     Opinion of Lessee's Counsel (Certificate Closing Date)
EXHIBIT A(1)(b)                     Opinion of Lessee's Special Counsel (Certificate Closing Date)
EXHIBIT A(2)(a)                     [Reserved]
EXHIBIT A(2)(b)                     [Reserved]
EXHIBIT A(3)                        Opinion of Indenture Trustee's Special Counsel
EXHIBIT A(4)(a)                     Opinion of Owner Trustee's Special Counsel (Certificate Closing Date)
EXHIBIT A(5)                        Opinion of Pass-Through Trustee's and Subordination Agent's Special Counsel
EXHIBIT A(6)(A)                     Opinion of Liquidity Provider's Counsel
EXHIBIT A(6)(b)                     Opinion of Liquidity of Provider's Special Counsel
EXHIBIT A(7)                        [Reserved]
EXHIBIT A(8)                        [Reserved]
EXHIBIT B                           Lease Agreement
EXHIBIT C                           Trust Indenture and Security Agreement
EXHIBIT D                           Trust Agreement
EXHIBIT E                           Purchase Agreement Assignment with PAA Consent
EXHIBIT F                           Engine Warranty Assignment with Engine Manufacturer's Consent




<PAGE>






                             PARTICIPATION AGREEMENT
                   (ATLANTIC COAST AIRLINES TRUST NO. ______)


         PARTICIPATION  AGREEMENT  (ATLANTIC  TRUST AIRLINES TRUST NO.  _______)
dated as of September 30, 1997 (this "Agreement") among ATLANTIC COAST AIRLINES,
a California  corporation  (herein,  together with its  successors and permitted
assigns,  the "Lessee" and the "Initial Owner  Participant"),  STATE STREET BANK
AND TRUST  COMPANY OF  CONNECTICUT,  NATIONAL  ASSOCIATION,  a national  banking
association,  not in its  individual  capacity,  except as  otherwise  expressly
stated herein, but solely as owner trustee under the Trust Agreement referred to
below (in such capacity as trustee,  together with its  successors and permitted
assigns,  the "Owner Trustee"),  THE FIRST NATIONAL BANK OF MARYLAND, a national
banking  association,  not in  its  individual  capacity,  except  as  otherwise
expressly  stated  herein,  but solely as indenture  trustee under the Indenture
referred to below (in such capacity as trustee, together with its successors and
permitted  assigns,  the  "Indenture  Trustee"),  THE  FIRST  NATIONAL  BANK  OF
MARYLAND, a national banking association, not in its individual capacity, except
as otherwise expressly stated herein, but solely as pass-through trustee of four
separate  Pass-Through  Trusts (in such  capacity as trustee,  together with its
successors and permitted  assigns,  the "Pass-Through  Trustee"),  and THE FIRST
NATIONAL BANK OF MARYLAND, a national banking association, not in its individual
capacity,   except  as  otherwise   expressly  stated  herein,   but  solely  as
subordination  agent (in such capacity as trustee,  together with its successors
and permitted assigns, the "Subordination Agent").

                                                    W I T N E S S E T H:

         WHEREAS,  capitalized  terms  used  herein  shall  have the  respective
meanings set forth or referred to in Article 1 hereof.

         WHEREAS,  the Initial  Owner  Participant  has  entered  into the Trust
Agreement with the Owner Trustee in its individual  capacity,  substantially  in
the form of  Exhibit D  hereto,  pursuant  to which  Trust  Agreement  the Owner
Trustee agrees,  among other things, to hold the Lessor's Estate for the benefit
of the Initial Owner  Participant on the terms specified in the Trust Agreement,
subject to the Lien of the Indenture.

         WHEREAS,  on the  Pass-Through  Closing  Date, a closing  occurred with
respect to the offering of Pass-Through Certificates issued by each Pass-Through
Trust, an allocable amount of the proceeds of which offering will be used by the
Pass-Through   Trustee  to  purchase  for  each  such  Pass-Through   Trust  the
Certificates of the Series and Maturity applicable thereto.

         WHEREAS,  as of September 26, 1997, the Owner Trustee and the Indenture
Trustee  have  entered into the  Indenture  for the benefit of the  Pass-Through
Trustee,  pursuant to which the Owner Trustee is issuing the Certificates to the
Subordination  Agent on behalf of the  Pass-Through  Trustee as  evidence of the
loans made by the  Pass-Through  Trustee to the Owner  Trustee,  the proceeds of
which loans will be  deposited by the  Indenture  Trustee on behalf of the Owner
Trustee in the Collateral Account.

         WHEREAS,  on the  Pass-Through  Closing Date, (i) ING Bank N.V. entered
into three revolving credit agreements (each, a "Liquidity  Facility"),  one for
the  benefit  of  the  holders  of  Pass-Through  Certificates  of  each  of the
Pass-Through Trusts for the Series A Certificates, the Series B Certificates and
the  Series C  Certificates,  with the  Subordination  Agent,  as agent  for the
Pass-Through  Trustee on behalf of each such  Pass-Through  Trust;  and (ii) the
Pass-Through  Trustees,  each  Liquidity  Provider and the  Subordination  Agent
entered into the Intercreditor Agreement.

         WHEREAS,  the  Certificates  will be held  by the  Subordination  Agent
pursuant to the  Intercreditor  Agreement on behalf of the Pass-Through  Trustee
for each of the Pass-Through Trusts.

         WHEREAS,  prior to the Delivery Date, the Certificates  will be secured
by the Liquid Collateral.

         WHEREAS,  pursuant  to the  terms of the  Trust  Agreement,  the  Owner
Trustee will be authorized and directed by the Initial Owner Participant:

                  (a)      on the Delivery Date, to purchase the Aircraft from the Seller;

                  (b) on the  Delivery  Date,  to execute  and deliver the Lease
         substantially  in the form of  Exhibit  B  hereto,  pursuant  to which,
         subject to the terms and conditions  set forth in the Lease,  the Owner
         Trustee  agrees to lease to the Lessee,  and the Lessee agrees to lease
         from the Owner Trustee,  the Aircraft on the Delivery Date,  such lease
         to be effected by the  execution and delivery on the Delivery Date of a
         Lease Supplement,  in the form of Exhibit A to the Lease,  covering the
         Aircraft and incorporating by reference all of the terms of the Lease;

                  (c) to execute and deliver the Indenture, substantially in the
         form of Exhibit C hereto,  for the benefit of the Holders  from time to
         time of the  Certificates,  pursuant to which the Owner Trustee agrees,
         among  other  things,  (A) to  deposit,  mortgage  and pledge  with the
         Indenture  Trustee,  as part of the Trust Indenture Estate,  all of the
         Lessor's  Estate  but not  Excepted  Payments,  (B) on the  Certificate
         Closing Date, to issue Certificates substantially in the form set forth
         in Exhibit B to the  Indenture,  the proceeds of the sale of which will
         be held by the Indenture  Trustee on behalf of the Owner Trustee in the
         Collateral  Account until released in accordance  with the terms hereof
         and of the  Indenture,  and (C) on the  Delivery  Date,  to execute and
         deliver the Indenture Supplement,  substantially in the form of Exhibit
         A to  the  Indenture,  covering  the  Aircraft  and  supplementing  the
         Indenture; and

                  (d) on the  Delivery  Date,  to execute  and  deliver  (i) the
         Purchase Agreement Assignment,  whereby the Lessee assigns to the Owner
         Trustee the right to purchase the Aircraft  from the Seller and certain
         of the Lessee's  rights and interests  under the Purchase  Agreement to
         the extent that the same relate to the  Aircraft  (except to the extent
         reserved  in  the  Purchase  Agreement   Assignment),   which  Purchase
         Agreement  Assignment is to include as an annex a PAA Consent  executed
         by the Manufacturer,  and (ii) the Engine Warranty  Assignment pursuant
         to which  the  Lessee  assigns  to the  Owner  Trustee  certain  of the
         Lessee's  rights under the General Terms  Agreement with respect to the
         Engines, which Engine Warranty Assignment is to include as an annex the
         Engine Manufacturer's Consent executed by the Engine Manufacturer,  the
         Purchase Agreement  Assignment,  and PAA Consent to be substantially in
         the form of Exhibit E hereto and the Engine Warranty Assignment and the
         Engine  Manufacturer's  Consent  to be in  substantially  the  form  of
         Exhibit F hereto, in each case, as amended or modified on or before the
         Delivery Date in accordance with the terms hereof.

         WHEREAS,  on the Delivery Date pursuant to and subject to the terms and
conditions  of  this  Agreement,  the  Purchase  Agreement  Assignment,  the PAA
Consent, the Engine Warranty Assignment,  the Engine Manufacturer's Consent, the
FAA  Bill of Sale,  and the  Warranty  Bill of  Sale,  the  Owner  Trustee  will
purchase,  and  receive  title to,  the  Aircraft  from the Seller and lease the
Aircraft to the Lessee pursuant to the Lease.

         NOW,  THEREFORE,  in consideration of the mutual covenants contained in
this  Agreement and other good and valuable  consideration,  receipt of which is
hereby acknowledged, the parties hereto agree as follows:



                                    ARTICLE 1

                                   DEFINITIONS

         Unless  otherwise  specifically  provided  herein,  the definitions set
forth in  Schedule I hereto are  incorporated  herein for all  purposes  of this
Agreement  and shall be equally  applicable  to both the singular and the plural
forms of the terms so defined.



                                    ARTICLE 2

                     ISSUANCE OF PASS-THROUGH CERTIFICATES;
                      ISSUANCE AND PURCHASE OF CERTIFICATES

         Section 2.01.  Transfer of Funds.

         (a) On the  Pass-Through  Closing Date: (i) the Lessee shall direct the
Placement  Agent to  execute  a wire  transfer  or  intra-bank  transfer  to the
Pass-Through Trustee in the amount of the total proceeds payable pursuant to the
Placement Agreement with respect to the Pass-Through Certificates,  and (ii) the
Pass-Through  Trustee  shall  deliver  the  Pass-Through   Certificates  to  the
Placement Agent upon receipt by the Pass-Through Trustee of such proceeds.

         (b) Subject to the  satisfaction  or waiver of the conditions set forth
herein, on the Certificate  Closing Date, on behalf of each Pass-Through  Trust,
from an allocable amount of the proceeds of the sale of the related Pass-Through
Certificates, the Pass-Through Trustee shall purchase the Certificates specified
for such Pass-Through Trust on Schedule II hereto. For each Pass-Through  Trust,
the  Pass-Through  Trustee shall pay an amount equal to the principal  amount of
Certificates of the Series and Maturity that relates to such Pass-Through Trust,
which amounts in the aggregate shall equal the aggregate principal amount of the
Certificates as specified in Section 2.04 of the Indenture. The aggregate amount
payable by the  Pass-Through  Trustee  pursuant to this Section 2.01(b) shall be
payable by wire  transfer or  intra-bank  transfer to the  Indenture  Trustee on
behalf of the Owner Trustee.

         (c) On the  Certificate  Closing Date, the Indenture  Trustee shall, on
behalf of the Owner Trustee,  deposit, by wire transfer or intra-bank  transfer,
the amounts  received by it pursuant to Section 2.01(b) hereof in the Collateral
Account pursuant to the Indenture.

         (d) On or before the Certificate Closing Date, the parties hereto shall
execute and deliver, to the extent they are parties thereto,  and consent to the
execution  and  delivery of (if they are not  parties  thereto),  the  Indenture
(other than the Indenture Supplement), and the other documents listed in Section
4.01(d) hereof, and the Owner Trustee shall execute and deliver to the Indenture
Trustee for  authentication,  and the Indenture  Trustee shall  authenticate and
deliver to the  Subordination  Agent on behalf of the  Pass-Through  Trustee for
each of the  Pass-Through  Trusts,  upon the request of the Owner  Trustee,  the
Certificates as provided in Section 2.02 hereof.

         (e)      The Closings shall take place at the offices of Shearman & Sterling,  599 Lexington  Avenue,  New
York, NY 10022.

         Section 2.02.  Certificates.  (a) Subject to the satisfaction or waiver
of the conditions set forth herein, on the Certificate Closing Date, the Initial
Owner  Participant will instruct the Owner Trustee to execute and deliver to the
Indenture  Trustee,  and the Indenture  Trustee shall  authenticate and deliver,
upon the request of the Owner Trustee,  to the Subordination  Agent on behalf of
the Pass-Through  Trustee for each of the Pass-Through  Trusts, the Certificates
specified for such Pass-Through Trust on Schedule II hereto,  which (i) shall be
issued in the principal amount and in the Series and Maturity set forth for such
Certificate in Schedule II hereto, (ii) shall bear interest at the interest rate
set forth for such  Certificate in Schedule II hereto,  (iii) shall be issued in
such form and on such terms as are  specified  in the  Indenture,  (iv) shall be
dated and authenticated on the Certificate  Closing Date and shall bear interest
from the Certificate Closing Date and (v) shall be registered in the name of the
Subordination Agent on behalf of the Pass-Through  Trustee for such Pass-Through
Trust.

         (b) Transfer of Beneficial Interest. If on a date prior to the Delivery
Date,  the Lessee shall have  identified one or more Owner  Participants  ready,
willing  and able to  acquire  the  Beneficial  Interest  of the  Initial  Owner
Participant in consideration for such Owner Participant's or Owner Participants'
agreement to participate  in the Lessor's  payment of the Purchase Price for the
Aircraft on the Delivery Date as provided in Section 3.02(a) hereof, the Initial
Owner  Participant  shall  transfer  its  Beneficial   Interest  to  such  Owner
Participant or Owner  Participants  on such date (the "Transfer  Date").  On the
Delivery  Date (or if  earlier  the  Transfer  Date),  the  document  amendments
contemplated  by Section 2.03 hereof  (subject to the  limitations  set forth in
such Section) shall be effected and such amended documents delivered.



         Section 2.03.  Amendments on Delivery or Transfer  Date.  (a) Amendment
and  Restatement  of Certain  Documents.  Upon any transfer by the initial Owner
Participant of its Beneficial  Interest on the Delivery Date (as contemplated by
Section 3.02(a) hereof (or, if earlier,  the Transfer Date),  the parties hereto
shall enter into amendments and restatements of the Trust Agreement,  the Lease,
the  Indenture and this  Agreement,  which  amendments  and  restatements  shall
reflect  such  changes as shall have been  requested  by the Owner  Participant,
agreed to by the Lessee and, if modified in any  material  respect,  as to which
Rating Agency  Confirmation  shall have been obtained from each Rating Agency by
the Lessee (to be  delivered  by the  Lessee to the Pass  Through  Trustee on or
before the Delivery Date or the Transfer  Date,  as the case may be);  provided,
however,  that in any event such amended and restated  documents  shall not vary
the Mandatory Economic Terms and shall contain the Mandatory Document Terms.

         The Lessee agrees to furnish to each Liquidity  Provider and to Coudert
Brothers (the initial Liquidity  Provider's special New York counsel) at its New
York office,  attention:  David  Schmidt,  as soon as  practicable  prior to the
estimated Delivery Date (or, if earlier,  the estimated Transfer Date), true and
complete  copies  of  drafts  of any such  amended  and  restated  Participation
Agreement,  amended and  restated  Lease  Agreement  and  amended  and  restated
Indenture.  The Lessee further agrees to furnish to each Liquidity  Provider and
to  the  counsel  identified  in the  preceding  sentence  (i)  each  and  every
subsequent  draft of such  documents and (ii)  promptly  following the execution
thereof, true and complete copies of such documents.

         (b) Amendments to Certain Schedules. The schedule of principal payments
on the  Certificates  set  forth in  Section  6.06 of the  Indenture  and in the
Certificate on the Certificate  Closing Date have been calculated  based in part
upon a hypothetical  owner's economic return and certain  assumptions  regarding
the Delivery  Date,  Transaction  Costs,  tax law,  Basic Term and certain other
items (the  "Assumptions").  If the  Initial  Owner  Participant  transfers  its
Beneficial  Interest to one or more Owner  Participants on the Delivery Date (as
contemplated  by Section  3.02(a)  hereof (or, if earlier,  the Transfer  Date),
then,  no  later  than  20  days  following  the  Delivery  Date  (the  "Initial
Reoptimization  Date"),  the Owner  Trustee may elect to amend such  schedule of
principal  payments to reflect the actual Owner's or Owners' Economic Return and
any changes to the Assumptions,  subject to the restrictions set forth below. On
the  Initial  Reoptimization  Date  the  Owner  Trustee  shall  deliver  and the
Subordination  Agent on behalf of the Pass Through  Trustee of each Pass Through
Trust  shall  accept  delivery  of an  amended  Schedule  I to each  Certificate
containing such changed principal installments.

         The  Owner  Trustee  will  give not less  than 10 days'  notice  of the
Initial  Reoptimization  Date. Any amendments to the Indenture and such Schedule
shall not vary the Mandatory  Economic  Terms and on the Initial  Reoptimization
Date the Lessee shall deliver a certificate to the Pass Through  Trustee and the
Liquidity  Providers  signed by the Vice  President  and  Treasurer or any other
authorized  officer of the Lessee  certifying  to such  effect.  If the  Initial
Reoptimization  Date occurs later than the Delivery Date, the Lessee shall cause
any required filing and recording of the affected documents with the Aeronautics
Authority to be effected on the Initial Reoptimization Date.

                                    ARTICLE 3

                  PARTICIPATION IN INVESTMENT ON DELIVERY DATE;
                              DELIVERY OF AIRCRAFT

         Section 3.01.  Lessee's  Notice of Delivery  Date. The Lessee agrees to
give the Owner  Participant,  the  Indenture  Trustee,  the Owner  Trustee,  the
Pass-Through  Trustee and the Liquidity  Providers at least three Business Days'
written or facsimile  notice prior to the Delivery  Date (which  notice shall be
effective only if received not later than 12:00 noon (New York City time) on the
date that is at least three  Business  Days prior to the Delivery  Date),  which
Delivery  Notice shall specify the amount of the Purchase  Price,  the amount of
the Owner Participant's Commitment,  the Debt Portion, the Delivery Date for the
Aircraft, the serial number of the Airframe and each Engine, and the Aeronautics
Authority registration number for the Aircraft.

         Section  3.02.  Commitments  to  Participate  in  Purchase  Price.  (a)
Participation  in Purchase  Price.  Subject to the terms and  conditions of this
Agreement,  on the  Delivery  Date,  (i) subject to the proviso to this  Section
3.02(a), the Indenture Trustee agrees to release the Debt Portion or such lesser
amount as may then be held in the  Collateral  Account  together with the Lessee
Shortfall (as defined in clause (iii)  below),  if any, to the Owner Trustee for
application  to the Purchase  Price as provided  below,  (ii) unless  previously
transferred  on the  Transfer  Date,  the Initial  Owner  Participant  agrees to
transfer its Beneficial  Interest to the Owner  Participant in consideration for
the Owner  Participant's  participation  in the Lessor's payment of the Purchase
Price through an investment in the beneficial  ownership of the Lessor's  Estate
in an amount equal to the Purchase  Price minus the Debt Portion,  (iii) subject
to the  proviso  to  this  Section  3.02(a),  the  Lessee  agrees  to pay to the
Indenture  Trustee the excess,  if any, of (I) the Debt  Portion  over (II) such
amount as may then be held in the Collateral Account (the "Lessee Shortfall") as
provided in Section 17.02(a) hereof, and (iv) the Seller shall sell the Aircraft
to the Owner Trustee and the Owner Trustee shall  immediately  thereafter  lease
the  Aircraft to the Lessee  pursuant  to the Lease.  In  consideration  for the
assignment  to the Owner  Trustee by the  Lessee  under the  Purchase  Agreement
Assignment of the Lessee's  right to purchase the Aircraft,  the transfer by the
Initial Owner  Participant to the Owner  Participant of its Beneficial  Interest
and the transfer of title to the Aircraft from the Seller to the Owner  Trustee,
the  following  cash  payments  will be made by  wire  transfer  of  immediately
available funds on the Delivery Date: (A) by the Owner Trustee to the Seller, an
amount equal to the  remaining  balance due to the Seller for the  Aircraft,  as
evidenced  by the  Invoice,  (B) by the Owner  Trustee to the Lessee,  an amount
equal to the  Purchase  Price minus the cash  payment to the Seller  pursuant to
clause  (A)  above  and (C) by the  Indenture  Trustee,  on  behalf of the Owner
Trustee,  to the  Lessee  the  excess of any  amounts as may then be held in the
Collateral Account over the Debt Portion.

         (b)      Reserved.

         (c) No Obligation to Increase Commitments; Delayed Delivery. (i) If the
Indenture Trustee shall default in its obligation to make the amount of its Debt
Portion  available   pursuant  hereto,  the  Owner  Participant  shall  have  no
obligation to make any portion of such Debt Portion available or to increase the
amount of its  Commitment,  but the obligations of the Owner  Participant  shall
remain subject to the terms and conditions of this Agreement.

         (ii) Subject to the  provisions of Section 3.05 hereof,  if the closing
of the transactions contemplated by the Operative Agreements shall not have been
consummated by 2:00 p.m. (New York City time),  or such earlier time as directed
by the Lessee,  on the Scheduled  Delivery  Date,  the Owner Trustee  shall,  if
instructed  in writing by the  Lessee,  at the  expense of the  Lessee,  use its
reasonable  best  efforts  to cause the  Owner  Participant's  Commitment  to be
invested and reinvested to the extent  practicable at the direction  received by
it from the Lessee  (with a copy to the Owner  Participant),  at the risk of the
Lessee, in Permitted  Investments  consisting of either commercial paper or time
deposits;  provided,  however,  that in the absence of instructions by 2:00 p.m.
(New York City time) the Owner Trustee shall use its  reasonable  [best] efforts
to cause such amount or the proceeds  thereof to be invested and  reinvested  to
the extent  practicable in overnight  Eurodollar time deposits.  Earnings on any
such investments shall be applied to the Lessee's payment  obligations,  if any,
to such Owner  Participant  pursuant to the last two  paragraphs of this Section
3.02, and the balance, if any, of such earnings remaining after such application
shall be paid in accordance with the Lessee's written instructions.

         If for any reason (i) the  Operative  Agreements  shall not be executed
and delivered by the respective parties thereto and/or the delayed Delivery Date
shall not occur  (whether by reason of a failure to meet a  condition  precedent
thereto  set  forth in  Article 4 hereof or  otherwise)  on or before  the third
Business Day after the  Scheduled  Delivery Date (or earlier if requested by the
Owner  Participant)  or, if earlier,  the Cut-Off  Date,  or (ii) the Lessee has
notified the Owner Trustee (with a copy to the Owner  Participant) prior to 2:00
p.m. (New York City time) on any date after the Scheduled  Delivery Date that it
does not intend to go forward to close the transactions  contemplated hereby for
such Delivery Date, the Owner  Participant  may cancel any funding  arrangements
made to fund  its  Commitment  on the  Scheduled  Delivery  Date  but the  Owner
Participant's  Commitment  hereunder  with respect to the Aircraft  shall not be
terminated  thereby  until the Cut-off Date,  whereupon the Owner  Participant's
Commitment  hereunder  shall  terminate.  On such  third  Business  Day (or such
earlier  date)  or the  Cut-Off  Date,  as the  case  may  be,  or the  earliest
practicable Business Day thereafter,  the Owner Trustee shall return the amounts
held  by  it  hereunder  on  behalf  of  the  Owner  Participant  to  the  Owner
Participant, provided that the Owner Trustee shall have had a reasonable time to
liquidate any Permitted Investments it has been authorized to invest in pursuant
to the preceding  paragraph and to obtain the proceeds therefrom in funds of the
type originally received, and the Lessee shall pay interest on such funds to the
Owner  Participant at the Debt Rate,  such interest to be payable for the period
from and including such  Scheduled  Delivery Date to but excluding the date such
funds are returned to the Owner Participant in accordance with the terms hereof;
provided that if any such funds are returned to the Owner Participant after 2:00
p.m.  (New York City  time) on any such  date,  such  funds  shall be deemed for
purposes of this paragraph to have been returned on the next succeeding Business
Day.

         The Lessee  shall  reimburse  the Owner  Trustee on demand for any loss
incurred  by the Owner  Trustee  as a result of the  investment  of funds by the
Owner Trustee in accordance with the terms of this Section 3.02(c). Further, the
Lessee shall  indemnify  the Owner Trustee and hold it harmless from and against
any cost or expense the Owner Trustee may incur as a result of any investment of
funds or  transfer  of funds  referred  to herein in  accordance  with the terms
hereof.  The Owner  Trustee shall not be liable for failure to invest such funds
except  as  otherwise  provided  herein  or for  any  losses  incurred  on  such
investments  except for any losses  arising out of its own gross  negligence  or
willful misconduct.

         Section 3.03.  Reserved.

         Section 3.04.  Reserved.

         Section  3.05.   Postponement   of  Delivery  Date.  (a)  If  no  Owner
Participant  has committed to participate in the  transactions  contemplated  to
occur on the Scheduled  Delivery Date or if an Owner  Participant  shall for any
reason fail or refuse to make the full amount of its Commitment available on the
Scheduled Delivery Date in accordance with the terms of Section 3.02 hereof, the
Owner Trustee will promptly give each party confirmed  facsimile  notice thereof
and the Lessee shall  postpone  the  Delivery  Date to a date not later than the
Cut-off Date. If no Owner  Participant  has committed to participate or an Owner
Participant  shall for any reason  fail or refuse to make the full amount of its
Commitment available in accordance with the terms of Section 3.02 hereof on such
postponed Delivery Date (in which event the Owner Participant's  interest in the
Lessor's  Estate shall be  automatically  reconveyed to the Lessee),  the Lessee
shall endeavor during such period to identify another equity investor to whom it
can assign its Beneficial Interest. If the Lessee identifies an equity investor,
the Lessee shall assign its interest in the Lessor's  Estate as provided  above.
In case of any such conveyance (or any conveyance by the Lessee to another owner
participant on or prior to the Cut-Off Date) (but subject to the satisfaction of
the conditions  precedent specified herein), the Indenture Trustee shall release
the Debt  Portion or such  lesser  amount as may then be held in the  Collateral
Account for  application  to the payments  contemplated  in the last sentence of
Section 3.02(a)  hereof.  If no such equity investor is identified or if for any
reason other than the failure of the Seller to deliver the Aircraft,  the Lessee
does not enter into the Lease and the Lease Supplement with the Owner Trustee on
or  prior to the  Cut-Off  Date,  the  Lessee,  the  Indenture  Trustee  and the
Pass-Through  Trustee  agree that the Lessee  shall  purchase  the  Aircraft and
assume all the  obligations  of the Owner  Trustee under the  Certificates  upon
satisfaction of the  requirements set forth in Sections 4.02 and 7.11(b) (to the
extent applicable) hereof, and as otherwise necessary to reflect a full recourse
secured aircraft financing of the Lessee.

         (b)  Release of  Obligations.  If (i) the Seller  fails to deliver  the
Aircraft on or prior to the Cut-Off  Date or (ii) the Lessee does not enter into
the Lease and the Lease Supplement and the conditions to the Lessee's assumption
of the  Certificates  pursuant to Section  3.05(a) have not been satisfied on or
prior to the Cut-Off  Date,  then,  in such event,  the Owner  Trustee shall not
purchase  the  Aircraft  from  the  Seller,  and the  parties  to the  Operative
Agreements  shall have no further  obligations or  liabilities  under any of the
Operative  Agreements with respect to the Aircraft,  including the obligation of
the Owner  Participant to participate in the payment of the Purchase Price,  and
such documents  shall terminate and have no further force or effect with respect
to the  Aircraft;  provided,  that the Lessee shall  provide,  no later than the
Cut-Off Date, notice of prepayment to the Indenture Trustee and the Certificates
shall be prepaid on the 15th day  following  the  Cut-Off  Date as  provided  in
Section  6.02(a)(vi) of the Indenture and Section  17.02(c)  hereof and provided
further,  that  (i) the  Lessee's  obligation  to pay any  Transaction  Costs as
provided in Section 3.04 hereof (to the extent such section is  applicable)  and
to indemnify such parties to the extent provided in such documents, shall not be
diminished  or modified in any  respect  and (ii) the  obligations  of the Owner
Trustee,  the Indenture Trustee and the Lessee to return funds and pay interest,
costs,  expenses and other amounts  thereon or in respect thereof as provided in
Section 3.02 hereof shall continue.

         (c) Optional  Postponement.  Without limiting the provisions of Section
3.02(c) hereof,  the Scheduled  Delivery Date may be postponed from time to time
(but in no event shall the Delivery Date be later than the Cut-Off Date) for any
reason,  other than pursuant to Section 3.05(a) hereof,  if the Lessee gives the
Owner Participant,  the Indenture Trustee,  the Owner Trustee,  the Pass-Through
Trustee and the Liquidity  Providers  confirmed  facsimile  notice (or telephone
notice followed by written  confirmation) of such postponement and notice of the
date to which the Delivery Date has been postponed,  such notice of postponement
to be  received  by each party no later than 11:00 a.m.  (New York City time) on
the Business Day preceding the Scheduled Delivery Date.

         Section  3.06.  Closing.  The closing  with respect to the purchase and
lease of the  Aircraft on the  Delivery  Date shall take place at the offices of
Troutman Sanders LLP, 600 Peachtree Street, N.E., Atlanta, Georgia 30308 or such
other place as the Lessee, the Owner Participant and the Indenture Trustee shall
mutually agree.



                                    ARTICLE 4

                              CONDITIONS PRECEDENT

         Section 4.01.  Conditions  Precedent  (Certificate  Closing Date).  The
obligations of the Owner Trustee, the Lessee, the Initial Owner Participant, the
Indenture  Trustee,  the  Subordination  Agent and the  Pass-Through  Trustee on
behalf  of  each   Pass-Through   Trust  to  participate  in  the   transactions
contemplated  hereby  on  the  Certificate  Closing  Date  are  subject  to  the
fulfillment  to the  reasonable  satisfaction  of such  party (or waiver by such
party), prior to or on the Certificate Closing Date, of the following conditions
precedent  (it  being  understood  that  receipt  by  the  Lessee  of any of the
following documents shall not be a condition precedent to the obligations of any
party):

                  (a) Certificates.  (i) On the Certificate  Closing Date, there
         shall have been duly issued and  delivered by the Owner  Trustee to the
         Subordination  Agent on behalf  of the  Pass-Through  Trustee  for each
         Pass-Through   Trust,   against   payment   therefor,   a  Certificate,
         substantially in the form set forth in Exhibit B to the Indenture, duly
         authenticated, dated the Certificate Closing Date and registered in the
         name of the Subordination  Agent, in the principal amounts,  Series and
         Maturity,  bearing  the  interest  rate and  otherwise  as  provided in
         Section  2.04 of the  Indenture,  and (ii) on the  Certificate  Closing
         Date, the "Certificates" (as defined in each of the Related Indentures)
         have been duly issued and delivered by the "Owner  Trustee" (as defined
         in each of the Related Indentures) to the Subordination Agent on behalf
         of the Pass-Through Trustee for each Pass-Through Trust.

                  (b) Legal Investment. On the Certificate Closing Date, no fact
         or  condition  shall exist under  applicable  laws or  regulations,  or
         interpretations   of  any  such  laws  or   regulations  by  applicable
         regulatory  authorities,  which,  in the  opinion  of the  Pass-Through
         Trustee, the Subordination Agent, or the Indenture Trustee,  would make
         it illegal for the Initial  Owner  Participant,  the Lessee,  the Owner
         Trustee,  the  Pass-Through  Trustee,  the  Subordination  Agent or the
         Indenture Trustee,  and no change in circumstances  shall have occurred
         which would otherwise make it illegal or otherwise in  contravention of
         guidance  issued  by  regulatory  authorities  for  the  Initial  Owner
         Participant,  the Lessee, the Owner Trustee, the Pass-Through  Trustee,
         the Subordination Agent or the Indenture Trustee, to participate in the
         transactions to be consummated on the Certificate  Closing Date; and no
         action or proceeding shall have been instituted nor shall  governmental
         action before any court, governmental authority or agency be threatened
         which  in the  opinion  of  counsel  for  the  Indenture  Trustee,  the
         Subordination Agent or the Pass-Through  Trustee is not frivolous,  nor
         shall any order have been issued or proposed to be issued by any court,
         or  governmental  authority or agency,  as of the  Certificate  Closing
         Date, to set aside, restrain, enjoin or prevent the consummation of any
         of the  transactions  contemplated  by this  Agreement or by any of the
         other Operative Agreements.

                  (c)  Placement   Agent.   The   Placement   Agent  shall  have
         transferred  the funds  specified  in  Section  2.01(a)  hereof and all
         conditions with respect thereto shall have been satisfied or waived.

                  (d)  Documents.  This  Agreement and the  following  documents
         shall  have  been  duly  authorized,  executed  and  delivered  by  the
         respective  party  or  parties   thereto,   shall  each  be  reasonably
         satisfactory  in form and substance to the Lessee,  the Owner  Trustee,
         the Indenture Trustee,  the Pass-Through  Trustee (each acting directly
         or by  authorization  to its special counsel) and shall each be in full
         force and effect; there shall not have occurred any default thereunder,
         or any event  which  with the lapse of time or the  giving of notice or
         both would be a default thereunder, and copies executed or certified as
         requested by the Lessee, the Owner Trustee,  the Indenture Trustee, the
         Pass-Through Trustee or the Subordination Agent, as the case may be, of
         such documents  shall have been delivered to the Lessee,  the Indenture
         Trustee,  the Pass-Through  Trustee,  the  Subordination  Agent and the
         Owner Trustee (provided,  that the sole  chattel-paper  original of the
         Lease shall be delivered to the Indenture Trustee):

                   (i)     the Indenture;

                  (ii)     the Trust Agreement;

                  (iii)    the ACA Guaranty;

                  (iv)     the Intercreditor Agreement;

                  (v)      the Liquidity  Facility for each of the  Pass-Through
                           Trusts  for the Series A  Certificates,  the Series B
                           Certificates and the Series C Certificates.

                  (e)  Approvals.  All approvals and consents of any trustees or
         holders of any  indebtedness  or obligations of the Lessee or ACA Inc.,
         which in the opinion of the Owner Participant, the Pass-Through Trustee
         or  the  Indenture   Trustee  are  required  in  connection   with  any
         transaction  contemplated  by this  Agreement,  shall  have  been  duly
         obtained.

                  (f)  Financing  Statements.  Uniform  Commercial  Code ("UCC")
         financing  statements  covering all the security  interests  (and other
         interests) intended to be created by or pursuant to the Granting Clause
         of the  Indenture  shall have been  executed and delivered by the Owner
         Trustee, as debtor, and by the Indenture Trustee, as secured party, for
         and on behalf of the Holders, for filing in Connecticut,  and all other
         actions shall have been taken which, in the opinion of the Pass-Through
         Trustee and the Placement  Agent,  are necessary to perfect and protect
         such security interests and other interests.

                  (g)  Corporate  Documents.  Except  when  such  Person  is the
         delivering  party,  the Owner Trustee,  the Pass-Through  Trustee,  the
         Lessee and the Indenture  Trustee (acting  directly or by authorization
         to its counsel) shall have received the following, in each case in form
         and substance reasonably satisfactory to it:

                           (i) a copy of the  certificate of  incorporation  and
                  by-laws  of  the  Lessee,  certified  by the  Secretary  or an
                  Assistant  Secretary  of the  Lessee  and ACA  Inc.  as of the
                  Certificate  Closing Date, and a copy of a resolution  adopted
                  by the board of directors of the Lessee,  certified as such as
                  of the Certificate Closing Date by such Secretary or Assistant
                  Secretary,  duly  authorizing  the lease by the  Lessee of the
                  Aircraft and the  execution,  delivery and  performance by the
                  Lessee of this Agreement,  the Indenture, a lease with respect
                  to the Aircraft,  the Pass-Through  Agreement,  and agreements
                  related thereto to which the Lessee is or is to be a party and
                  each other document to be executed and delivered by the Lessee
                  in connection with the transactions  contemplated hereby and a
                  copy of the resolutions of the board of directors of ACA Inc.,
                  certified  as such as of the  Certificate  Closing Date by the
                  Secretary or an Assistant Secretary, authorizing the execution
                  and  delivery  by ACA Inc. of the ACA  Guaranty  and the other
                  Operative  Agreements to which ACA Inc. is or is to be a party
                  and each other  document to be executed  and  delivered by ACA
                  Inc. in connection with the transactions contemplated hereby;

                           (ii) a copy  of the  articles  of  incorporation  and
                  by-laws and other instruments of the Owner Trustee,  certified
                  by the  Secretary  or an  Assistant  Secretary  of  the  Owner
                  Trustee  as of the  Certificate  Closing  Date (or other  like
                  instruments  satisfactory  to the Lessee and the Initial Owner
                  Participant) and evidence authorizing the execution,  delivery
                  and  performance  by  the  Owner  Trustee  in  its  individual
                  capacity  or as Owner  Trustee,  as the  case may be,  of this
                  Agreement, the Trust Agreement and each of the other Operative
                  Agreements to which it is or is to be a party,  whether in its
                  individual  capacity  or as  Owner  Trustee,  and  each  other
                  document to be executed and  delivered by the Owner Trustee in
                  connection with the transactions contemplated hereby;

                           (iii)  a copy  of the  articles  of  association  and
                  by-laws  and  other  instruments  of  the  Indenture  Trustee,
                  certified by the  Secretary  or an Assistant  Secretary of the
                  Indenture Trustee as of the Certificate Closing Date (or other
                  like  instruments  satisfactory  to the Lessee and the Initial
                  Owner  Participant)  and evidence  authorizing  the execution,
                  delivery and  performance by the Indenture  Trustee of each of
                  this Agreement,  the Indenture and each of the other Operative
                  Agreements to which it is or is to be a party,  and each other
                  document to be executed and delivered by the Indenture Trustee
                  in connection with the transactions contemplated hereby;

                           (iv)  a copy  of  the  articles  of  association  and
                  by-laws and other  instruments  of the  Pass-Through  Trustee,
                  certified by the  Secretary  or an Assistant  Secretary of the
                  Pass-Through  Trustee as of the  Certificate  Closing Date (or
                  other  like  instruments  satisfactory  to the  Lessee and the
                  Initial  Owner  Participant)  and  evidence   authorizing  the
                  execution,   delivery  and  performance  by  the  Pass-Through
                  Trustee of this Agreement,  the  Pass-Through  Agreement,  and
                  each of the other Operative Agreements to which it is or is to
                  be a  party,  and  each  other  document  to be  executed  and
                  delivered by the  Pass-Through  Trustee in connection with the
                  transactions contemplated hereby;

                           (v) a copy of the articles of association and by-laws
                  and other instruments of the Subordination Agent, certified by
                  the Secretary or an Assistant  Secretary of the  Subordination
                  Agent  as of the  Certificate  Closing  Date  (or  other  like
                  instruments  satisfactory  to the Lessee and the Initial Owner
                  Participant) and evidence authorizing the execution,  delivery
                  and performance by the Subordination  Agent of this Agreement,
                  the  Intercreditor  Agreement and each of the other  Operative
                  Agreements to which it is or is to be a party,  and each other
                  document to be executed  and  delivered  by the  Subordination
                  Agent in connection with the transactions contemplated hereby;
                  and

                           (vi) such other documents,  evidences, materials, and
                  information with respect to the Lessee, the Owner Trustee, the
                  Indenture Trustee, and the Pass-Through Trustee as the Initial
                  Owner  Participant,  the Indenture Trustee or the Pass-Through
                  Trustee  may  reasonably  request  in order to  establish  the
                  consummation   of  the   transactions   contemplated  by  this
                  Agreement.

                  (h)  Officer's  Certificate  of  Lessee  and ACA  Inc.  On the
         Certificate  Closing Date, the following  statements shall be true, and
         the Owner Trustee,  the Pass-Through  Trustee,  the Liquidity Providers
         and the Indenture  Trustee  shall have  received a  certificate  of the
         Lessee  and of ACA Inc.  signed  on its  respective  behalf by the Vice
         President  and  Treasurer or any other duly  authorized  officer of the
         Lessee or ACA Inc., as applicable,  dated the Certificate Closing Date,
         stating that:

                           (i) the  representations and warranties of the Lessee
                  and ACA Inc.,  as the case may be,  contained in the Operative
                  Agreements  to  which  it is a  party  and in any  certificate
                  delivered  pursuant  hereto or thereto are true and correct on
                  and as of the  Certificate  Closing Date as though made on and
                  as  of  such   date   (except   to  the   extent   that   such
                  representations  and  warranties  relate  solely to an earlier
                  date,  in which case such  certificate  shall  state that such
                  representations and warranties were true and correct on and as
                  of such earlier date);

                           (ii) except as  disclosed in the  Offering  Memo,  no
                  materially  adverse  change  has  occurred  in  the  financial
                  condition,  business or  operations  of the Lessee or ACA Inc.
                  from that shown in the unaudited  financial  statements of the
                  Lessee  and ACA Inc.  as of July 31,  1997,  and  nothing  has
                  occurred   which  will,  in  the  judgment  of  such  officer,
                  materially  adversely  affect the ability of the Lessee or ACA
                  Inc.,  as the case may be,  to  carry  on its  business  or to
                  perform its  obligations  under this  Agreement and each other
                  Operative Agreement to which it is or is to be a party; and

                           (iii) no event has  occurred  and is  continuing,  or
                  would result from the purchase,  sale,  mortgage,  or lease of
                  the  Aircraft,  which  constitutes  an Event of Loss (or event
                  which with the passage of time would  become an Event of Loss)
                  with respect to the Airframe or any Engine, or a Default under
                  the Lease.

                  (i)      Reserved.

                  (j) Other Officer's  Certificates.  On the Certificate Closing
         Date,  the  following  statements  shall be true,  and the Lessee,  the
         Pass-Through  Trustee, the Liquidity Providers,  the Owner Trustee, the
         Subordination  Agent and the  Indenture  Trustee  shall have received a
         certificate  from each of SSB and the Owner Trustee (in the case of the
         Lessee,  the  Pass-Through  Trustee,  the  Subordination  Agent and the
         Indenture Trustee),  FNBM and the Indenture Trustee (in the case of the
         Lessee, the Pass-Through Trustee, the Subordination Agent and the Owner
         Trustee), FNBM and the Pass-Through Trustee (in the case of the Lessee,
         the Indenture Trustee,  the Subordination Agent and the Owner Trustee),
         and FNBM and the  Subordination  Agent (in the case of the Lessee,  the
         Pass-Through  Trustee,  the Indenture  Trustee and the Owner  Trustee),
         signed by a duly  authorized  officer  of SSB and  FNBM,  respectively,
         dated the Certificate Closing Date, stating with respect to SSB and the
         Owner  Trustee,  with respect to FNBM and the Indenture  Trustee,  with
         respect to FNBM and the Pass-Through  Trustee,  or with respect to FNBM
         and the Subordination Agent, as the case may be, that:

                           (i) the  representations and warranties of SSB in its
                  individual  capacity  and as  Owner  Trustee,  of  FNBM in its
                  individual  capacity and as Indenture Trustee,  of FNBM in its
                  individual capacity and as Pass-Through Trustee, or of FNBM in
                  its individual  capacity and as Subordination  Agent contained
                  in this  Agreement,  the Lease,  the Trust  Agreement  and the
                  Indenture and in any certificate  delivered pursuant hereto or
                  thereto  are true  and  correct  on and as of the  Certificate
                  Closing  Date as though made on and as of such date (except to
                  the extent that such  representations  and  warranties  relate
                  solely to an  earlier  date,  in which  case such  certificate
                  shall state that such representations and warranties were true
                  and correct on and as of such earlier date);

                           (ii) to the  best of its  knowledge,  no  Default  or
                  Indenture  Default exists due to any action or omission on the
                  part of SSB in its individual capacity or as Owner Trustee, of
                  FNBM in its individual  capacity or as Indenture  Trustee,  of
                  FNBM in its individual capacity or as Pass-Through Trustee, or
                  of FNBM in its individual capacity or as Subordination  Agent;
                  and

                           (iii) there are no Lessor's Liens attributable to the
                  Owner Trustee or SSB and no Indenture Trustee's Liens.

                  (k) Legal Opinions. The Placement Agent, the Lessee, the Owner
         Trustee,  the  Pass-Through  Trustee and the Indenture  Trustee (acting
         directly  or by  authorization  to  its  special  counsel)  shall  have
         received from the following  counsel their respective legal opinions in
         each case reasonably  satisfactory to the Placement  Agent, the Lessee,
         the Owner Trustee,  the Pass-Through  Trustee or the Indenture Trustee,
         as the case may be, as to scope and substance  (and covering such other
         matters  as  the  recipient  may  reasonably  request)  and  dated  the
         Certificate Closing Date:

                           (i) Richard J.  Kennedy,  Vice  President and General
                  Counsel  of the  Lessee  and ACA Inc.,  in the form of Exhibit
                  A(l)(a)(i)  hereto and addressed to the Placement  Agent,  the
                  Owner  Trustee,  the  Pass-Through   Trustee,  each  Liquidity
                  Provider and the Indenture Trustee;

                           (ii) Ober, Kaler,  Grimes & Shriver,  special counsel
                  for the Indenture Trustee,  in the form of Exhibit A(3) hereto
                  and addressed to the Placement Agent,  the Indenture  Trustee,
                  the Owner Trustee,  the Pass-Through  Trustee,  each Liquidity
                  Provider and the Lessee;

                           (iii) Bingham,  Dana & Gould LLP, special counsel for
                  the Owner Trustee,  in the form of Exhibit  A(4)(a)(i)  hereto
                  and addressed to the Placement Agent,  the Indenture  Trustee,
                  the Owner Trustee,  the Pass-Through  Trustee,  each Liquidity
                  Provider and the Lessee;

                           (iv) Troutman  Sanders LLP,  special  leasing counsel
                  for  the  Lessee,  and of  Gibson,  Dunn &  Crutcher,  special
                  securities  counsel to the  Lessee,  in the forms  attached as
                  Exhibit  A(l)(b)(i)  hereto  and  addressed  to the  Placement
                  Agent,  the  Indenture   Trustee,   the  Owner  Trustee,   the
                  Pass-Through Trustee, each Liquidity Provider and the Lessee;

                           (v) Ober, Kaler, Grimes & Shriver special counsel for
                  the Pass-Through  Trustee and the Subordination  Agent, in the
                  form of Exhibit A(5) hereto  addressed to the Placement Agent,
                  the Indenture  Trustee,  the Owner Trustee,  the  Pass-Through
                  Trustee, each Liquidity Provider and the Lessee; and

                           (vi)  Clifford  Chance,  special Dutch counsel to ING
                  Bank N.V. in the form of Exhibit A(6)(a)  hereto,  and Coudert
                  Brothers,  special counsel for the Liquidity Providers, in the
                  form  of  Exhibit  A(6)(b)  hereto,   each  addressed  to  the
                  Pass-Through  Trustee, the Subordination Agent, each Liquidity
                  Provider and the Lessee.

                  (l)      No Indenture Default.  No Indenture Default exists.

                  (m) No Lease Default or Event of Loss. No Default exists,  and
         no Event of  Loss,  or event  which  with  the  passage  of time  would
         constitute an Event of Loss, shall exist.

                  (n) Other Agreements.  The Lessee and the Pass-Through Trustee
         shall have entered into the Pass-Through  Agreement,  all conditions to
         the  effectiveness of each thereof shall have been satisfied or waived,
         and the Pass-Through  Certificates  shall have been issued.  The Lessee
         and  the  Placement   Agent  shall  have  entered  into  the  Placement
         Agreement,  all conditions to the effectiveness thereof shall have been
         satisfied or waived, and the Pass-Through  Certificates shall have been
         delivered  pursuant to the Placement  Agreement.  All conditions to the
         effectiveness  of each Liquidity  Facility shall have been satisfied or
         waived.

                  (o)  Payment  of  Taxes.   (A)  All  taxes,   fees,   charges,
         assessments,   costs  and  other  expenses  then  due  and  payable  in
         connection  with the execution,  delivery,  recording and filing of all
         financing  statements  referred to in subparagraph  (f) of this Section
         4.01, or in connection with the issuance of the Certificates shall have
         been duly  paid or caused to be paid in full;  and (B) all sales or use
         taxes  and  duties  related  to the  consummation  of the  transactions
         contemplated  by the Operative  Agreements on the  Certificate  Closing
         Date which are then due and payable shall have been duly paid in full.

                  (p) Governmental  Compliance.  All appropriate action required
         to have  been  taken  by the  FAA,  the  SEC,  or any  governmental  or
         political agency,  subdivision or instrumentality of the United States,
         prior  to  the   Certificate   Closing  Date  in  connection  with  the
         transactions  contemplated by this Agreement shall have been taken, and
         all orders, permits, waivers, authorizations,  exemptions and approvals
         (collectively  "permits") of such entities  required to be in effect on
         the  Certificate  Closing  Date in  connection  with  the  transactions
         contemplated  by this  Agreement  shall have been issued,  and all such
         permits  shall be in full force and effect on the  Certificate  Closing
         Date.

                  (q)  Section  131.3 of the New York State  Banking Law Filing.
         SSB shall have delivered  evidence of its filing made with the New York
         Superintendent  of Banking  pursuant  to Section  131.3 of the New York
         State Banking Law.

                  (r) Letter of  Credit.  The Lessee  shall have  delivered  the
         Letter  of Credit  to the  Indenture  Trustee  in  connection  with the
         obligations  of the Lessee  pursuant  to the first  sentence of Section
         17.02(h) hereof.

         Section 4.02. Conditions Precedent (Delivery Date). Subject to the last
paragraph of this Section 4.02, the obligations of the Owner Trustee,  the Owner
Participant, the Indenture Trustee, the Subordination Agent and the Pass-Through
Trustee on behalf of each Pass-Through  Trust to participate in the transactions
contemplated  hereby on the Delivery Date are subject to the  fulfillment to the
reasonable  satisfaction of each party (or waiver by such party), prior to or on
the Delivery Date, of the following  conditions  precedent (it being  understood
that  receipt by the  Lessee of any of the  following  documents  shall not be a
condition precedent to the obligation of any party):

                  (a)  Notice,  Etc.  Each party  hereto  shall have  received a
         Delivery Notice pursuant to Section 3.01 hereof at least three Business
         Days prior to the Delivery Date.

                  (b) Legal Investment.  No change shall have occurred after the
         Certificate Closing Date (or, in the case of the Owner Participant, the
         Transfer Date) and on or prior to the Delivery Date in applicable  laws
         or regulations,  or  interpretations of any such laws or regulations by
         applicable regulatory  authorities,  which, in the opinion of the Owner
         Participant,  the Pass-Through Trustee, the Subordination Agent, or the
         Indenture Trustee, would make it illegal for the Owner Participant, the
         Lessee, the Owner Trustee, the Pass-Through  Trustee, the Subordination
         Agent or the Indenture  Trustee,  and no change in circumstances  shall
         have  occurred  which would  otherwise  make it illegal or otherwise in
         contravention  of guidance  issued by  regulatory  authorities  for the
         Owner  Participant,  the Lessee,  the Owner Trustee,  the  Pass-Through
         Trustee,   the  Subordination   Agent  or  the  Indenture  Trustee,  to
         participate in the transactions to be consummated on the Delivery Date;
         and no action  or  proceeding  shall  have  been  instituted  nor shall
         governmental action before any court,  governmental authority or agency
         be   threatened   which  in  the  opinion  of  counsel  for  the  Owner
         Participant,  the Indenture  Trustee,  the  Subordination  Agent or the
         Pass-Through  Trustee is not  frivolous,  nor shall any order have been
         issued or proposed to be issued by any court, or governmental authority
         or agency, as of the Delivery Date, to set aside,  restrain,  enjoin or
         prevent the  consummation  of any of the  transactions  contemplated by
         this Agreement or by any of the other Operative Agreements.

                  (c) Documents.  The documents  referred to in Section  4.01(d)
         hereof  shall  each be in  full  force  and  effect  and the  following
         documents  shall have been duly  authorized,  executed and delivered by
         the  respective  party or parties  thereto,  shall  each be  reasonably
         satisfactory  in form and substance to the Lessee,  the Owner  Trustee,
         the Indenture  Trustee,  the Pass-Through  Trustee,  the  Subordination
         Agent  and  the  Owner   Participant   (each  acting   directly  or  by
         authorization  to its special  counsel) and shall each be in full force
         and effect;  there shall not have occurred any default  thereunder,  or
         any event  which with the lapse of time or the giving of notice or both
         would be a default  thereunder,  and copies  executed or  certified  as
         requested by the Lessee, the Owner Trustee,  the Indenture Trustee, the
         Pass-Through  Trustee or the Owner Participant,  as the case may be, of
         such documents shall have been delivered to the Owner Participant,  the
         Lessee, the Indenture Trustee,  the Pass-Through  Trustee and the Owner
         Trustee (provided,  that the sole  chattel-paper  original of the Lease
         (whether  delivered on the Transfer Date or the Delivery  Date) and the
         Lease Supplement shall be delivered to the Indenture Trustee):

                  (i)      this Agreement, as amended and restated as of the Delivery Date;

                  (ii)     the Lease;

                  (iii) the Trust  Agreement,  as amended and restated as of the
Delivery Date;

                  (iv)     the Indenture, as amended and restated as of the Delivery Date;

                  (v)      the Lease Supplement covering the Aircraft, dated the Delivery Date;

                  (vi)     the Indenture Supplement covering the Aircraft, dated the Delivery Date;

                  (vii)    in the case of the Owner  Participant  only,  the Tax
                           Indemnity Agreement (unless delivered on the Transfer
                           Date);

                  (viii)   the Invoice;

                            the FAA Bill of Sale and the Warranty Bill of Sale;

                            the Purchase Agreement Assignment;

                  (xi)     the PAA Consent;

                            the Engine Warranty Assignment;

                            the Engine Manufacturer's Consent;

                            in the case of the Owner Participant only, the RVG;

                            in the case of the Owner Participant only, the Deficiency Agreement;

                            the Owner Participant Guaranty, if any; and

                  (xvii)   the Old Lease Termination;

         unless,  in the case of each of the  documents  listed in  clauses  (i)
         through  (iv) above they shall have been amended and restated as of and
         delivered on the Transfer Date.

                  (d) Legal  Opinions.  The  Owner  Participant,  the  Placement
         Agent, the Lessee, the Owner Trustee,  the Pass-Through Trustee and the
         Indenture  Trustee (acting  directly or by authorization to its special
         counsel)   shall  have  received  from  the  following   counsel  their
         respective  legal opinions in each case reasonably  satisfactory to the
         Owner Participant,  the Placement Agent, the Lessee, the Owner Trustee,
         the Pass-Through  Trustee or the Indenture Trustee, as the case may be,
         as to scope and  substance  (and  covering  such  other  matters as the
         recipient may reasonably request) and dated the Delivery Date:

                           (i)      Richard J. Kennedy,  Vice  President and General  Counsel of the Lessee and ACA
                  Inc.,  addressed  to  the  Placement  Agent,  the  Owner  Participant,  the  Owner  Trustee,  the
                  Pass-Through Trustee, each Liquidity Provider and the Indenture Trustee;

                           (ii) special leasing counsel for the Lessee addressed
                  to the Placement Agent, the Owner  Participant,  the Indenture
                  Trustee,  the Owner Trustee,  the Pass-Through  Trustee,  each
                  Liquidity Provider and the Lessee;

                           (iii) special counsel for the Owner Trustee addressed
                  to the Placement Agent, the Owner  Participant,  the Indenture
                  Trustee,  the Owner Trustee,  the Pass-Through  Trustee,  each
                  Liquidity Provider and the Lessee;

                           (iv) special aviation counsel,  in customary form and
                  addressed to the Placement Agent, the Owner  Participant,  the
                  Indenture  Trustee,   the  Owner  Trustee,   the  Pass-Through
                  Trustee, each Liquidity Provider and the Lessee;

                                             special  counsel  for  the  Manufacturer  addressed  to the  Placement
                  Agent,  the Owner  Participant,  the  Indenture  Trustee,  the Owner  Trustee,  the  Pass-Through
                  Trustee, each Liquidity Provider and the Lessee;

                                             counsel  for  the  Engine  Manufacturer  addressed  to  the  Placement
                  Agent,  the Owner  Participant,  the  Indenture  Trustee,  the Owner  Trustee,  the  Pass-through
                  Trustee, each Liquidity Provider and the Lessee;

                           (vii) in the case of the Owner  Participant only, tax
                  counsel  to the  Owner  Participant,  addressed  to the  Owner
                  Participant, with respect to tax matters;

                           (viii) special counsel for the Manufacturer addressed
to the Owner Participant;

                           (ix) special  counsel for SDIQ addressed to the Owner
                  Participant and the Owner Trustee; and

                           (x) special counsel for the Owner Participant and the
                  Owner Participant Guarantor, if any, and the General Counsel's
                  Office of the Owner Participant and the Owner Participant,  if
                  any,  addressed to the Placement Agent, the Owner Participant,
                  the Indenture  Trustee,  the Owner Trustee , the  Pass-Through
                  Trustee, each Liquidity Provider and the Lessee.

         (e) Title,  Airworthiness and  Registration.  On the Delivery Date, the
following  statements  shall be true, and the Owner  Participant,  the Indenture
Trustee,  the  Pass-Through  Trustee and the Owner  Trustee  shall have received
evidence from the Lessee reasonably  satisfactory to the Owner Participant,  the
Indenture Trustee,  the Pass-Through Trustee and the Owner Trustee to the effect
that:

                           (i) the Owner Trustee has good and  marketable  title
                  (subject to filing and  recording of the FAA Bill of Sale with
                  the Aeronautics Authority) to the Aircraft,  free and clear of
                  Liens,  except the rights of the Owner  Trustee and the Lessee
                  under the Lease, the rights of the Indenture Trustee under the
                  Indenture (including the Indenture Supplement), the beneficial
                  interest  of  the  Owner  Participant  created  by  the  Trust
                  Agreement, and the interest of the Certificate Holders created
                  by the Indenture, which evidence shall include the FAA Bill of
                  Sale and the Warranty Bill of Sale;

                           (ii) the Aircraft has been duly  certificated  by the
                  Aeronautics Authority as to type and airworthiness;

                           (iii) the Old Lease Termination (if applicable and if
                  the Old Lease was filed of record with the FAA),  the FAA Bill
                  of Sale, the amended and restated  Lease  (including the Lease
                  Supplement), the amended and restated Indenture (including the
                  Indenture  Supplement),  and the  amended and  restated  Trust
                  Agreement shall have been duly filed for recordation (or shall
                  be in the process of being so duly filed for recordation) with
                  the FAA pursuant to the Transportation Code; and

                           (iv)  application to the FAA for  registration of the
                  Aircraft in the name of the Owner Trustee shall have been duly
                  filed and the Lessee shall have permanent authority to operate
                  the Aircraft.

                  (f) Financing Statements. (i) a form UCC-3 financing statement
         to amend and restate each  financing  statement  referred to in Section
         4.01(f)  hereof  shall have been  executed  and  delivered by the Owner
         Trustee, as debtor, and by the Indenture Trustee, as secured party, and
         a form UCC-1 financing  statement  covering all the security  interests
         (and other interests)  created by or pursuant to the Granting Clause of
         the  Indenture  shall have been  executed  and  delivered  by the Owner
         Trustee, as debtor, and by the Indenture Trustee, as secured party, for
         and on behalf of the Holders,  and (ii) a UCC notice filing  describing
         the Lease as a lease  shall have been  executed  and  delivered  by the
         Owner Trustee, as lessor, and the Lessee, as lessee (which filing shall
         name the  Indenture  Trustee as  assignee  of the Owner  Trustee),  for
         filing in Virginia.

                  (g) Payments.  The Owner Participant shall have made available
         its   Commitment  to  the  Owner   Trustee,   and  the  other  payments
         contemplated  by Section  3.02 hereof shall have been made and interest
         accrued on the Certificates  prior to (but excluding) the Delivery Date
         shall have been paid on or before the Delivery Date in accordance  with
         Section 17.02 hereof.

                  (h) Report of Aircraft  Expert.  The Owner  Participant  shall
         have received a report  prepared by BK Associates,  Inc.,  addressed to
         the Owner  Participant (with an abbreviated  report to the Lessee),  in
         form and substance reasonably  satisfactory to the Owner Participant to
         the effect that, on the Delivery Date:

                           (i)  (A)  the  estimated  fair  market  value  of the
                  Aircraft net of any cost to the Owner Participant or the Owner
                  Trustee of return at the end of the Basic Term and any Renewal
                  Term (determined  without including in such value any increase
                  or decrease for  inflation  or  deflation  during the Term) is
                  equal to or greater than 20% of the Purchase  Price and (B) at
                  least 20% of the useful  economic life of the Aircraft will be
                  remaining at the end of the Basic Term and any Renewal Term;

                           (ii)     the  estimated  useful life of the  Aircraft is at least 125% of the Basic Term
                  and any Renewal Term;

                           (iii) the Purchase  Price is no greater than the fair
                  market value of the Aircraft on the Delivery Date;

                           (iv) on the  Delivery  Date,  the  Aircraft  will not
                  require any modifications,  improvements or additions in order
                  to be  rendered  complete  for  its  intended  purpose  by the
                  Lessee;

                           (v)  the  amount  payable  by  the  Lessee  upon  the
                  exercise of its purchase option  pursuant to Section  16(a)(1)
                  of the Lease equals or exceeds the  currently  estimated  Fair
                  Market Value of the Aircraft on such date (taking into account
                  inflation or deflation to such date); and

                           (vi)     the Aircraft is not limited use property.

                  (i) Insurance. Each of the Indenture Trustee, the Pass-Through
         Trustee,  the  Owner  Trustee  and the  Owner  Participant  shall  have
         received such evidence as it reasonably deems  appropriate,  including,
         without limitation,  an independent insurance broker's report, together
         with  certificates of insurance from such broker, in form and substance
         reasonably  satisfactory  to the Indenture  Trustee,  the  Pass-Through
         Trustee, the Owner Trustee and the Owner Participant, to establish that
         the insurance required by Section 12 of the Lease is in effect.

                  (j)  Payment  of  Taxes.   (A)  All  taxes,   fees,   charges,
         assessments,   costs  and  other  expenses  then  due  and  payable  in
         connection  with the execution,  delivery,  recording and filing of all
         financing  statements and the documents and instruments  referred to in
         subparagraphs  (e) and (f) of this Section 4.02, or in connection  with
         the purchase of the Aircraft by the Owner Trustee and the making by the
         Owner Participant of its equity investment shall have been duly paid or
         caused to be paid in full;  and (B) all  sales or use taxes and  duties
         related to the  consummation  of the  transactions  contemplated by the
         Operative  Agreements  on the  Delivery  Date  which  are  then due and
         payable shall have been duly paid in full.

                  (k)      No Indenture Default.  No Indenture Default exists.

                  (l) No Lease Default or Event of Loss. No Default exists,  and
         no Event of  Loss,  or event  which  with  the  passage  of time  would
         constitute an Event of Loss, shall exist.

                  (m) Governmental  Compliance.  All appropriate action required
         to have  been  taken  by the  FAA,  the  SEC,  or any  governmental  or
         political agency,  subdivision or instrumentality of the United States,
         prior  to  the  Delivery  Date  in  connection  with  the  transactions
         contemplated by this Agreement  shall have been taken,  and all orders,
         permits,    waivers,    authorizations,    exemptions   and   approvals
         (collectively  "permits") of such entities  required to be in effect on
         the Delivery Date in connection with the  transactions  contemplated by
         this Agreement shall have been issued, and all such permits shall be in
         full force and effect on the Delivery Date.

                  (n)  Officer's  Certificate  of  Lessee  and ACA  Inc.  On the
         Delivery  Date, the following  statements  shall be true, and the Owner
         Participant,  the  Owner  Trustee,  the  Pass-Through  Trustee  and the
         Indenture  Trustee shall have received a certificate  of the Lessee and
         of ACA Inc.,  signed on its respective behalf by the Vice President and
         Treasurer  or any other  duly  authorized  officer of the Lessee or ACA
         Inc., as applicable, dated the Delivery Date, stating that:

                           (i) the  representations and warranties of the Lessee
                  or ACA Inc.,  as the case may be,  contained in the  Operative
                  Agreements to which it is a party (excluding the Tax Indemnity
                  Agreement) and in any certificate delivered pursuant hereto or
                  thereto are true and correct on and as of the Delivery Date as
                  though made on and as of such date  (except to the extent that
                  such  representations  and  warranties  relate  solely  to  an
                  earlier date, in which case such certificate  shall state that
                  such  representations  and warranties were true and correct on
                  and as of such earlier date);

                           (ii) except as  disclosed in the  Offering  Memo,  no
                  materially  adverse  change  has  occurred  in  the  financial
                  condition,  business,  or operations of the Lessee or ACA Inc.
                  from that shown in the unaudited  financial  statements of the
                  Lessee  and ACA Inc.  as of July 31,  1997,  and  nothing  has
                  occurred  which  will,  in the  reasonable  judgment  of  such
                  officer, materially adversely affect the ability of the Lessee
                  or ACA Inc.,  as the case may be, to carry on its  business or
                  to perform its obligations under this Agreement and each other
                  Operative Agreement to which it is or is to be a party; and

                           (iii) no event has  occurred  and is  continuing,  or
                  would result from the purchase,  sale,  mortgage,  or lease of
                  the  Aircraft,  which  constitutes  an Event of Loss (or event
                  which with the passage of time would  become an Event of Loss)
                  with respect to the Airframe or any Engine, or a Default under
                  the Lease.

                  (o) Officer's  Certificate of Owner  Participant and any Owner
         Participant  Guarantor.  On the Delivery Date, the following statements
         shall be true,  and the Lessee,  the  Pass-Through  Trustee,  the Owner
         Trustee and the  Indenture  Trustee  shall have  received a certificate
         from the Owner Participant, signed by a duly authorized officer of (aa)
         the Owner Participant dated the Delivery Date, stating that:

                           (i) the  representations  and warranties of the Owner
                  Participant  contained in this Agreement,  the Trust Agreement
                  and any other Operative Agreement (excluding the Tax Indemnity
                  Agreement)  to  which  it is a  party  and in any  certificate
                  delivered pursuant hereto or thereto,  are true and correct on
                  and as of the  Delivery  Date as though made on and as of such
                  date  (except  to the  extent  that such  representations  and
                  warranties  relate  solely to an earlier  date,  in which case
                  such  certificate  shall state that such  representations  and
                  warranties  were true and  correct  on and as of such  earlier
                  date);

                           (ii)     no Lessor's Liens attributable to the Owner Participant exist; and

                           (iii) no event has occurred and is  continuing  which
                  constitutes  or,  with  notice or lapse of time or both  would
                  constitute,  an  Indenture  Event  of  Default  other  than an
                  Indenture  Event of Default  attributable  to a Lease Event of
                  Default.

         and (bb) from the Owner Participant Guarantor, if any, signed by a duly
         authorized  officer  of such  Owner  Participant  Guarantor  dated  the
         Certificate   Closing  Date,  stating  that  the   representations  and
         warranties of such Owner Participant  Guarantor  contained in its Owner
         Participant  Guaranty and in any  certificate  delivered at the closing
         pursuant  thereto  are true and  correct  on and as of the  Certificate
         Closing  Date as  though  made on and as of such  date  (except  to the
         extent that such  representations  and  warranties  relate solely to an
         earlier  date,  in which case such  certificate  shall  state that such
         representations  and warranties were true and correct on and as of such
         earlier date).

                  (p) Other  Officer's  Certificates.  On the Delivery Date, the
         following  statements  shall be true,  and the Owner  Participant,  the
         Lessee, the Pass-Through  Trustee, the Owner Trustee, the Subordination
         Agent and the Indenture  Trustee shall have received a certificate from
         each of SSB and the  Owner  Trustee  (in the  case of the  Lessee,  the
         Pass-Through  Trustee,  the Owner Participant,  the Subordination Agent
         and the Indenture Trustee), FNBM and the Indenture Trustee (in the case
         of the Lessee, the Pass-Through  Trustee,  the Owner  Participant,  the
         Subordination  Agent and the Owner Trustee),  FNBM and the Pass-Through
         Trustee (in the case of the Lessee,  the Indenture  Trustee,  the Owner
         Participant,  the Subordination Agent and the Owner Trustee),  and FNBM
         and the Subordination  Agent (in the case of the Lessee,  the Indenture
         Trustee, the Owner Participant,  the Pass-Through Trustee and the Owner
         Trustee),  signed  by  a  duly  authorized  officer  of  SS  and  FNBM,
         respectively,  dated the Delivery Date, stating with respect to SSB and
         the Owner Trustee, with respect to FNBM and the Indenture Trustee, with
         respect to FNBM and the Pass-Through  Trustee,  or with respect to FNBM
         and the Subordination Agent, as the case may be, that:

                           (i) the  representations and warranties of SSB in its
                  individual  capacity  and as  Owner  Trustee,  of  FNBM in its
                  individual  capacity and as Indenture Trustee,  of FNBM in its
                  individual capacity and as Pass-Through Trustee, or of FNBM in
                  its individual  capacity and as Subordination  Agent contained
                  in this  Agreement,  the Lease,  the Trust  Agreement  and the
                  Indenture and in any certificate  delivered pursuant hereto or
                  thereto are true and correct on and as of the Delivery Date as
                  though made on and as of such date  (except to the extent that
                  such  representations  and  warranties  relate  solely  to  an
                  earlier date, in which case such certificate  shall state that
                  such  representations  and warranties were true and correct on
                  and as of such earlier date);

                           (ii) to the  best of its  knowledge,  no  Default  or
                  Indenture  Default exists due to any action or omission on the
                  part of SSB in its individual capacity or as Owner Trustee, of
                  FNBM in its individual  capacity or as Indenture  Trustee,  of
                  FNBM in its individual capacity or as Pass-Through Trustee, or
                  of FNBM in its individual capacity or as Subordination  Agent;
                  and

                           (iii) there are no Lessor's Liens attributable to the
                  Owner  Trustee  or  SSB  and  no  Indenture   Trustee's  Liens
                  affecting the Trust Indenture Estate or the Lessor's Estate or
                  any part thereof.

                  (q) Release of Debt Portion.  The Indenture Trustee shall have
         released the Debt  Portion  from (or such lesser  amount as may then be
         held in) the Collateral Account.

                  (r)  Officer's   Certificate  of  Lessee  Regarding  Mandatory
         Economic Terms and Mandatory  Document  Terms. On the Delivery Date, or
         if earlier,  the  Transfer  Date,  in  connection  with the  amendments
         contemplated  by Sections  2.03 and 2.04 hereof,  the Lessee shall have
         delivered a certificate to the  Pass-Through  Trustee and the Liquidity
         Providers  signed by the Vice President and Treasurer or any other duly
         authorized  officer  of the  Lessee  stating  that  (i)  the  Operative
         Agreements  which are amended and restated as of the  Delivery  Date or
         the  Transfer  Date,  as the  case may be,  do not  vary the  Mandatory
         Economic  Terms and contain the Mandatory  Document  Terms and (ii) any
         substantive  modification of such documents from those in effect on the
         Certificate  Closing Date does not materially and adversely  affect the
         Holders of Pass-Through  Certificates  and each Liquidity  Provider and
         such certification shall be true and correct.

Notwithstanding anything else to the contrary in this Section 4.02, it shall not
be a condition  precedent  to the  obligations  of the  Indenture  Trustee,  the
Pass-Through  Trustee or the Subordination  Agent that the conditions in Section
4.02(n) and (o) be satisfied if the Lessee certifies that the failure to fulfill
such condition precedent is not reasonably likely to materially adversely affect
the holders of  Pass-Through  Certificates  and,  in the event of such  failure,
there has been delivered to the Indenture Trustee written confirmation from both
Moody's and S&P of the rating on any class of Pass-Through Certificates.

         Section 4.03.  Opinion of Special Aviation  Counsel Upon  Registration.
Promptly  upon the  registration  of the  Aircraft  and the  filing  and,  where
appropriate,  recordation  pursuant to the Transportation Code, of the Old Lease
Termination (if the Old Lease was filed of record with the FAA), the FAA Bill of
Sale, the Trust Agreement,  the Lease (including the Lease Supplement),  and the
Indenture (including the Indenture  Supplement),  the Lessee shall cause Special
Aviation  Counsel to deliver to the Owner  Participant,  the  Lessee,  the Owner
Trustee, the Pass-Through Trustee and the Indenture Trustee an opinion as to (i)
the due registration of the Aircraft in the name of the Owner Trustee,  (ii) the
due recording pursuant to the  Transportation  Code of the Old Lease Termination
if the Old Lease was filed of record  with the FAA),  the FAA Bill of Sale,  the
amended and restated Trust Agreement,  the amended and restated Lease (including
the Lease Supplement),  and the Indenture (including the Indenture  Supplement),
and (iii),  subject to  customary  qualifications,  the lack of any  intervening
documents with respect to the Aircraft.



                                    ARTICLE 5

                  CONDITIONS PRECEDENT TO LESSEE'S OBLIGATIONS

         Section  5.01.  Conditions  Precedent  to  Lessee's  Obligations.   The
Lessee's  obligation to participate in the transactions  contemplated  hereby on
the Certificate  Closing Date is subject to the conditions  that, prior to or on
the  Certificate  Closing Date, the Lessee shall have received the  certificates
and other documents which are referred to in, or the opinions to be addressed to
it under, as the case may be, paragraphs (d), (g)(ii)-(v),  (j), (k)(ii)-(vi) of
Section  4.01  hereof and the  Placement  Agent  shall have made  available  the
amounts  required  to be paid by it  pursuant to Section  2.01  hereof,  and the
Lessee's  obligation to participate in the transactions  contemplated  hereby on
the  Delivery  Date,  is  subject  to the  conditions  that,  on or prior to the
Delivery Date,  the Lessee shall have received the documents  which are referred
to in,  or the  opinions  to be  addressed  to it  under,  as the  case  may be,
paragraphs (c) and (d)(ii)-(vi) of Section 4.02 hereof and the Indenture Trustee
shall have  released the Debt Portion from (or such lesser amount as may then be
held in) the Collateral Account.



                                    ARTICLE 6

               LESSEE'S REPRESENTATIONS, WARRANTIES AND COVENANTS

         Section  6.01.  Lessee's  Representations  and  Warranties.  The Lessee
represents  and  warrants to the Owner  Participant,  the Owner  Trustee (in its
individual  capacity and as Owner  Trustee),  the  Pass-Through  Trustee (in its
individual capacity and as Pass-Through  Trustee),  the Liquidity Provider,  and
the  Indenture  Trustee (in its  individual  capacity and as Indenture  Trustee)
that, on the date hereof and as of the Certificate Closing Date and the Delivery
Date (unless any such representation is specifically made as of one date):

                  (a) the Lessee is a  corporation  duly  organized  and validly
         existing and is in good standing under the laws of California,  has its
         principal place of business and chief  executive  office (as such terms
         are used in  Article  9 of the  Uniform  Commercial  Code)  in  Dulles,
         Virginia, and is duly qualified to do business as a foreign corporation
         and is in good standing in each jurisdiction where the failure to be so
         qualified or in good standing would have a materially adverse effect on
         its  business or would  impair its  ability to perform its  obligations
         under the Operative Agreements;

                  (b) the Lessee has full  power,  authority  and legal right to
         conduct its business and  operations as currently  conducted and to own
         or hold under  lease its  Properties  and to enter into and perform its
         obligations  under this Agreement,  the other  Operative  Agreements to
         which  it  is a  party,  the  Pass-Through  Agreement  and  the  Series
         Supplements (the "Lessee Documents");

                  (c) the Lessee is an "air  carrier"  within the meaning of the
         Transportation  Code  and  a  holder  of a  certificate  under  Section
         41102(a)  of the  Transportation  Code  and a  "citizen  of the  United
         States"   within   the   meaning  of   Section   40102(a)(15)   of  the
         Transportation  Code  holding an "air  carrier  operating  certificate"
         issued  under  Chapter  447 of the  Transportation  Code  for  aircraft
         capable of carrying ten or more  individuals or 6,000 pounds or more of
         cargo, and each such certificate is in full force and effect;

                  (d)  the  Lessee   possesses   all   necessary   certificates,
         franchises,  licenses,  permits,  rights and  concessions  and consents
         (collectively  "permits")  which are  material to the  operation of the
         routes flown by it and the conduct of its business  and  operations  as
         currently conducted and each such permit is in full force and effect;

                  (e) the  execution,  delivery  and  performance  of the Lessee
         Documents  by the Lessee  have been duly  authorized  by all  necessary
         corporate  action  on the part of the  Lessee  and do not  require  any
         stockholder  approval,  or approval or consent of any trustee or holder
         of any  indebtedness  or  obligations  of the  Lessee,  and  each  such
         document has been duly  executed and delivered or, in the case of those
         Lessee  Documents   constituting  Operative  Agreements  identified  in
         Section  4.02(c)  hereof,  will on the  Delivery  Date be executed  and
         delivered by the Lessee and  constitutes  (or will  constitute,  as the
         case may be) the legal,  valid and  binding  obligations  of the Lessee
         enforceable  against it in accordance  with the terms thereof except as
         such enforceability may be limited by bankruptcy,  insolvency, or other
         similar laws or by general equitable principles;

                  (f) no  authorization,  consent or approval of or other action
         by, and no notice to or filing with, any United States federal or state
         governmental   authority  or  regulatory   body  is  required  for  the
         execution,  delivery  or  performance  by  the  Lessee  of  the  Lessee
         Documents or for the use and  maintenance  of the  Aircraft  except for
         such  registrations,  applications  and  recordings  referred to in the
         opinions  of Special  Aviation  Counsel  delivered  or to be  delivered
         pursuant  to  Sections  4.02(d)(vi)  and 4.03 hereof and except for the
         filings  referred to in Sections  4.01(f)  and 4.02(f)  hereof,  all of
         which  shall be in full force and  effect on and as of the  Certificate
         Closing Date or the Delivery Date, or as contemplated by such Sections;

                  (g) neither the  execution,  delivery  or  performance  by the
         Lessee  of the  Lessee  Documents  nor  compliance  with the  terms and
         provisions  hereof  or  thereof,  conflicts  or will  conflict  with or
         results or will  result in a breach or  violation  of any of the terms,
         conditions  or provisions  of, or will require any consent  (other than
         the PAA  Consent  and the Engine  Manufacturer's  Consent)  or approval
         under,  any  law,  governmental  rule  or  regulation  or  the  charter
         documents,  as amended,  or bylaws,  as  amended,  of the Lessee or any
         order,  writ,  injunction  or  decree  of  any  court  or  governmental
         authority against the Lessee or by which it or any of its Properties is
         bound or any  indenture,  mortgage or contract  or other  agreement  or
         instrument  to which the Lessee is a party or by which it or any of its
         Properties  is  bound,  or  constitutes  or will  constitute  a default
         thereunder or results or will result in the imposition of any Lien upon
         any of its Properties;

                  (h) there are no pending or, to the  knowledge  of the Lessee,
         threatened actions,  suits,  investigations or proceedings  (whether or
         not  purportedly  on behalf of the  Lessee)  against or  affecting  the
         Lessee or any of its Property before or by any court or  administrative
         agency (A) which involve the Aircraft or (B) which (except as disclosed
         in the Offering  Memo),  if adversely  determined,  may  reasonably  be
         expected  to  have  a  materially   adverse   effect  on  the  Lessee's
         consolidated  financial condition,  business, or operations,  or (C) if
         adversely determined,  would materially adversely affect the ability of
         the Lessee to perform its obligations under the Lessee Documents;

                  (i) the  Lessee  has filed or caused to be filed all  federal,
         state and material local and non-U.S. tax returns which are required to
         be filed and has paid or  caused  to be paid all taxes  shown to be due
         and  payable  pursuant to such  returns or  pursuant to any  assessment
         received by the Lessee (other than  assessments the payment of which is
         being contested in good faith by the Lessee by appropriate  proceedings
         that do not involve any material  risk of sale,  forfeiture  or loss of
         the Aircraft or any part  thereof),  and the Lessee has no knowledge of
         any related  actual or proposed  deficiency  or  additional  assessment
         which either in any case or in the aggregate would materially adversely
         affect the Lessee's consolidated financial condition;

                  (j) except  for (A) the  registration  in the Owner  Trustee's
         name  of  the  Aircraft  pursuant  to  the  Transportation  Code  to be
         accomplished  by filing with the FAA, of the Old Lease  Termination (if
         the Old Lease was filed of record  with the FAA,  the FAA Bill of Sale,
         the Trust Agreement, the Affidavits and the Application, (B) the filing
         with and,  where  appropriate,  recordation  by the FAA pursuant to the
         Transportation   Code  of  the  Indenture   (including   the  Indenture
         Supplement),  and the Lease (including the Lease  Supplement),  (C) the
         filing of the financing  statements referred to in Sections 4.01(f) and
         4.02(f) hereof, and (D)(x) on the Certificate  Closing Date, the taking
         of  possession by the Indenture  Trustee of the Liquid  Collateral  and
         maintaining possession by the Indenture Trustee thereof as contemplated
         in Section 2.14(a) of the Indenture,  and (y) on the Delivery Date, the
         taking  of  possession  by  the  Indenture   Trustee  of  the  original
         counterpart of the Lease (including the Lease  Supplement),  no further
         action, including any filing or recording of any document, is necessary
         or advisable in order (i) to establish the Owner Trustee's title to and
         interest in the Aircraft and the Lessor's  Estate as against the Lessee
         and any third parties,  or (ii) to perfect the first security  interest
         in and  mortgage  Lien on the  Trust  Indenture  Estate in favor of the
         Indenture Trustee;

                  (k) on the Delivery  Date, the Owner Trustee has received good
         and  marketable  title to the  Aircraft,  free and clear of all  Liens,
         except  Permitted  Liens except the rights of the Owner Trustee and the
         Lessee  under  the  Lease  and the  Lease  Supplement,  the Lien of the
         Indenture,  the  rights  of  the  Owner  Participant  under  the  Trust
         Agreement and the rights of the  Indenture  Trustee under the Indenture
         and other Permitted Liens not filed of record;

                  (l)      with respect to ERISA:

                           (i) none of the Pension  Plans (as defined at the end
                  of this  Section  6.01(l)) nor their  related  trusts has been
                  terminated  in a  distress  termination  pursuant  to  Section
                  4041(c)  of  ERISA  or  by  the   Pension   Benefit   Guaranty
                  Corporation   (together   with   any   successor   agency   or
                  instrumentality  thereto, the "PBGC") pursuant to Section 4042
                  of ERISA,  nor has any action been taken so to  terminate  any
                  Pension Plan or related trust,  and neither the Lessee nor any
                  ERISA  Affiliate  (as  defined  at  the  end of  this  Section
                  6.01(l)) has incurred or could reasonably be expected to incur
                  any  material  liability  with respect to a Pension Plan under
                  Section 4062, 4063, 4064 or 4069 of ERISA;

                           (ii) there have been no "reportable  events" (as such
                  term is defined in Section  4043(b) of ERISA) with  respect to
                  any Pension Plan which have  resulted or could  reasonably  be
                  expected to result in any material  liability of the Lessee or
                  any ERISA Affiliate;

                           (iii) no  "accumulated  funding  deficiency" (as such
                  term is defined in Section  302 of ERISA or Section 412 of the
                  Code) exists with respect to any Pension Plan,  whether or not
                  waived,  nor has any request for a waiver under Section 412(d)
                  of the Code been,  or is  reasonably  likely to be, filed with
                  respect to any of the Pension Plans;

                           (iv) neither the Lessee nor any ERISA  Affiliate  has
                  failed to make any contribution or payment to any Pension Plan
                  which has resulted or could  reasonably  be expected to result
                  in the  imposition of a Lien under Section  302(f) of ERISA or
                  Section 412(n) of the Code;

                           (v)  all  Pension  Plans  are  in  compliance  in all
                  material respects with all applicable  provisions of ERISA and
                  the Code;

                           (vi) neither the Lessee nor any ERISA  Affiliate  has
                  incurred  or  is  reasonably  likely  to  incur  any  material
                  withdrawal liability pursuant to Section 4201 or 4204 of ERISA
                  or any material liability under Section 515 of ERISA;

                           (vii) to the best of the Lessee's knowledge,  neither
                  the  Lessee  nor  any  ERISA   Affiliate   has  engaged  in  a
                  "prohibited  transaction"  (within the meaning of Section 4975
                  of the Code or Section 406 of ERISA) which could reasonably be
                  expected  to  subject  the Lessee to the tax or  penalties  on
                  prohibited transactions imposed by Section 4975 of the Code or
                  Section 502 of ERISA; and

                           (viii)  assuming  the  truth  of the  representations
                  contained in Section 7.09 hereof and  compliance  with Section
                  10.06 of the  Indenture,  the  execution  and delivery of this
                  Agreement  and  the  other   Operative   Agreements   and  the
                  consummation  of  the  transactions  contemplated  hereby  and
                  thereby will not involve any  transaction  which is prohibited
                  by  Section  406 of ERISA or in  connection  with  which a tax
                  could be imposed pursuant to Section 4975 of the Code. No part
                  of the funds to be used by the Lessee in  satisfaction  of its
                  obligations under this Agreement or any other of the Operative
                  Agreements  to which  the  Lessee  is a party or to which  the
                  Lessee is bound are the assets of any  employee  benefit  plan
                  subject  to Title I of  ERISA,  or any  individual  retirement
                  account or an employee benefit plan subject to Section 4975 of
                  the Code;

         as used in this  Section  6.01(l),  the term  "Pension  Plan"  means an
         employee  pension  benefit  plan as defined  in  Section  3(2) of ERISA
         (other than a multiemployer  plan as defined in Section 4001 (a) (3) of
         ERISA)  which is covered by Title IV of ERISA or subject to the minimum
         funding   standards  under  Section  412  of  the  Code  and  which  is
         maintained,  or contributed  to, by the Lessee or any ERISA  Affiliate,
         and the term "ERISA Affiliate" means any entity which together with the
         Lessee would be treated as a single employer under Section 414(b), (c),
         (m) or (o) of the Code;

                  (m)      the Lessee is a Citizen of the United States;

                  (n) except for the filings  referred  to in Sections  4.01(f),
         4.02(e) and 4.02(f)  hereof,  no  governmental  approval of any kind is
         required  of the  Owner  Participant  or for  the  Owner  Participant's
         execution  of or  performance  under this  Agreement  or any  agreement
         contemplated  hereby  by  reason  of any  fact or  circumstance  of the
         Lessee, the nature of the Aircraft, or the Lessee's proposed operations
         or use of the Aircraft;

                  (o) on the Delivery  Date,  all premiums which have become due
         with respect to the insurance  required to be provided by the Lessee on
         or prior to the Delivery  Date under  Section 12 of the Lease have been
         paid by the Lessee;

                  (p) on the Delivery Date, all sales,  use, transfer or similar
         taxes  relating to the sale of the  Aircraft by the Seller to the Owner
         Trustee which are then or were theretofore due shall have been paid;

                  (q) the Lessee is not in default under any  mortgage,  deed of
         trust,  indenture,  lease or other instrument or agreement to which the
         Lessee is a party or by which it or any of its Properties or assets may
         be bound,  or in  violation of any  applicable  law,  which  default or
         violation  would  have a  materially  adverse  effect on the  financial
         condition,  business  or  operations  of the  Lessee or its  ability to
         perform any of its obligations under the Lessee Documents;

                  (r) no  Default  exists and no Event of Loss,  or event  which
         with the passage of time would constitute an Event of Loss, exists;

                  (s) on  the  Delivery  Date,  the  Aircraft  will  be in  such
         condition  so  as to  enable  the  airworthiness  certificate  of  such
         Aircraft to be in good  standing  under the  Transportation  Code;  the
         Aircraft  will have been  duly  certificated  by the FAA as to type and
         airworthiness;  there will be in effect with  respect to the Aircraft a
         current and valid airworthiness  certificate issued by the FAA pursuant
         to the  Transportation  Code;  and there is no fact known to the Lessee
         which materially adversely affects the value,  utility,  useful life or
         condition of the Aircraft;

                  (t) on the Certificate Closing Date and the Delivery Date, the
         Lessee  shall  not be in  default  in the  performance  of any  term or
         condition of the Purchase Agreement,  and the aggregate amount of loans
         shall not exceed the Debt Portion;

                  (u) neither the Lessee nor any  subsidiary of the Lessee is an
         "investment company" or a company "controlled by an investment company"
         within the meaning of the Investment Company Act of 1940, as amended;

                  (v) on the Delivery Date, the Aircraft will, upon delivery, be
         fully  equipped to operate in  commercial  service and will comply with
         all governmental requirements governing such service;

                  (w) there are no broker's  or  underwriter's  fees  payable on
         behalf of the Lessee in connection with the  transactions  contemplated
         in the Operative Agreements other than those of the Placement Agent and
         Babcock & Brown, Inc. referred to in Article 10 hereof; and

                  (x)  interest  accrued  on  the  Certificates  prior  to  (but
         excluding)  the  Delivery  Date  shall  have been paid on or before the
         Delivery  Date in accordance  with Section 17.02 hereof,  together with
         all other amounts  owing by the Lessee or ACA Inc.  under the Indenture
         or any  other  Operative  Agreement,  to the  Holders  or the  relevant
         Indemnitee, as the case may be, on or prior to such date.

         Section  6.02.  Offering  by  Lessee.  (a) The  Lessee  represents  and
warrants that it has  authorized no one to act on its behalf in connection  with
the offer or sale of any interest in the Lessor's  Estate or the Trust Agreement
other  than   Babcock  &  Brown,   Inc.   Neither  the  Lessee  nor,   based  on
representations  of  Babcock & Brown,  Inc.,  anyone  acting on its  behalf  has
directly or indirectly  offered any interest in the Lessor's Estate or the Trust
Agreement, or similar interests,  for sale to, or solicited any offer to acquire
any of the same from, no more than 80 other  accredited  investors (as such term
is defined in  Regulation D  promulgated  under the  Securities  Act of 1933, as
amended).
         (b) The Lessee represents and warrants that it has authorized no one to
act on its behalf in  connection  with the offer or sale of any  interest in the
Certificates or the Pass-Through Certificates other than the Placement Agent.

         Section 6.03.  Certain  Covenants of Lessee.  The Lessee  covenants and
agrees with the Owner  Participant,  the Owner  Trustee (in its  individual  and
trust  capacities),  the  Pass-Through  Trustee  (in its  individual  and  trust
capacities) and the Indenture  Trustee (in its individual and trust  capacities)
as follows:

                  (a) The Lessee will cause to be done,  executed,  acknowledged
         and  delivered at the Lessee's  cost and expense all such further acts,
         conveyances and assurances as the Owner Trustee, the Indenture Trustee,
         the  Pass-Through  Trustee or the Owner  Participant  shall  reasonably
         require for  accomplishing  the purposes of the  Operative  Agreements.
         Without  limiting the  generality of this Section  6.03(a),  the Lessee
         will  promptly  take,  or cause to be taken,  at the Lessee's  cost and
         expense,   such  action  with   respect  to  the   recording,   filing,
         re-recording and re-filing of the Indenture  (including each supplement
         thereto),  the  Lease  (including  each  supplement  thereto),  and any
         financing  statements or other  instruments as may be necessary,  or as
         reasonably  requested  by the  Indenture  Trustee and  appropriate,  to
         maintain the  perfection  of the first  security  interest and the Lien
         created by the Indenture, and the Owner Trustee's title to and interest
         in the Aircraft and the Lessor's Estate,  as against the Lessee and any
         third parties, or if the Lessee cannot take, or cause to be taken, such
         action,  will furnish to the  Indenture  Trustee and the Owner  Trustee
         timely  notice of the  necessity  of such  action,  together  with such
         instruments,  in execution  form, and such other  information as may be
         required to enable  either of them to take such action at the  Lessee's
         cost and expense in a timely manner.

                  (b) From and after the Delivery  Date,  the Lessee shall cause
         the  Aircraft  to be duly  registered,  and at all times to remain duly
         registered,  in the name of the Owner Trustee  (provided that the Owner
         Trustee and the Owner  Participant  shall be and remain Citizens of the
         United States), under the Transportation Code, and shall furnish to the
         Owner Trustee such  information  as may be required to enable the Owner
         Trustee to make application for such registration;  provided,  however,
         that the Lessee may, at any time after the end of the  Recovery  Period
         (or before that date if the Lessee  prepays in a lump sum any indemnity
         required under the Tax Indemnity  Agreement as a result of such foreign
         registration)  cause the  Aircraft  to be  appropriately  re-registered
         under the laws of a country with which at the time of such registration
         the United States maintains normal  diplomatic  relations and is listed
         on Exhibit E-1 to the Lease; provided that

                  (i)      at the time of  re-registration,  no Specified Default exists or would occur as a result
         of such re-registration,

                  (ii) the Lessee shall pay all fees and expenses (including the
         reasonable fees and expenses of local counsel in such country) relating
         to such re-registration,

                  (iii) the Lessee shall, at its cost, cause the interest of the
         Owner  Trustee as owner of the  Aircraft and the  Indenture  Trustee as
         mortgagee  thereof to be duly  registered or recorded under the laws of
         such country and at all times  thereafter to remain so duly  registered
         or  recorded  unless  and until the  registration  of the  Aircraft  is
         changed as provided herein, and shall cause to be done at all times all
         other acts including the filing, recording and delivery of any document
         or instrument  and the payment of any sum necessary or, by reference to
         prudent  industry  practice  in such  country,  advisable  in  order to
         create,  preserve and protect such interest in the Aircraft  (including
         the first  priority duly perfected Lien under the Indenture) as against
         the Lessee or any third parties in such  jurisdiction,  and the laws of
         such  country  would give  effect to the Owner  Trustee's  title to the
         Aircraft and the Indenture Trustee's Lien thereon  substantially to the
         same effect as in the United States,

                  (iv) the  obligations of the Lessee and each other party under
         the  Operative  Documents  (and  of the  Sublessee,  if  any,  under  a
         Sublease) shall remain or be, as the case may be, legal, valid, binding
         and enforceable in such country and in the United States,

                  (v) The Lessee  shall ensure that all  insurance  provided for
         herein  shall be in full force and effect prior to, at the time of, and
         after such change in registration and the Owner Participant,  the Owner
         Trustee,  and the Indenture  Trustee  shall  receive a  certificate  of
         Lessee's insurance broker to such effect,

                  (vi) any  possessory  rights  in favor of the  Lessee  (or any
         Sublessee)   or  any  third  party,   including   any   government   or
         instrumentality  thereof, taken as whole, are not more restrictive than
         existing in the United States  (other than  immaterial  differences  in
         procedures  of  enforcement),  which would,  upon  bankruptcy  or other
         default by the Lessee (or any  Sublessee)  prevent or delay  beyond the
         recovery  time under the  then-existing  laws of the United  States the
         return of the Aircraft to the Owner Trustee in accordance with and when
         permitted  by the terms of the  Lease  upon the  exercise  by the Owner
         Trust or the Indenture Trustee of its remedies thereunder, and there is
         no adverse effect under the laws of such country of  re-registration to
         the enforceability (other than immaterial  differences in procedures of
         enforcement)  of the material  rights and remedies of the Owner Trustee
         and the  Indenture  Trustee  provided  for  herein  and under the other
         Operative  Agreements  (it being  understood  that,  in the  absence of
         restrictions similar to those imposed under Sections 362 and 363 of the
         Bankruptcy  Code,  rights and remedies similar to those available under
         Section 1110 of the Bankruptcy Code are not required),

                  (vii)  the  Owner  Participant,  the  Owner  Trustee,  and the
         Indenture Trustee shall have received evidence reasonably  satisfactory
         to them  that  such  country  imposes  aircraft  maintenance  standards
         approved by, or at least as stringent as those  approved by, the FAA or
         the central civil  aviation  authority of the United  Kingdom,  France,
         Germany or Canada,

                  (viii)   it  shall  not  be   necessary   by  reason  of  such
         re-registration  or for purposes of enforcing remedies contained in the
         Lease or the Indenture or the related  Sublease for the Owner  Trustee,
         the Indenture  Trustee or the Owner  Participant to register or qualify
         to do business in such country,

                  (ix) no Liens (except  Permitted  Liens) shall arise by reason
         of such  re-registration,  and the Indenture  shall continue as a first
         priority Lien on the collateral thereunder,

                  (x) none of the Owner Trustee,  the Indenture  Trustee and the
         Owner  Participant  shall be subjected to any adverse tax  consequences
         for which the  Lessee is not  required  to and does not then  indemnify
         such Person in a manner  [reasonably]  satisfactory to such Person as a
         result of such  re-registration and, if an additional indemnity is then
         provided  by the Lessee as the result of such  re-registration  and the
         Owner  Trustee,   the  Indenture   Trustee  or  the  Owner  Participant
         reasonably  deems itself insecure with respect to such  indemnity,  the
         Lessee shall have provided  security or collateral  for said  indemnity
         which is reasonably satisfactory to such Person,

                  (xi) in such country,  there is no tort  liability  imposed on
         passive  lessors other than tort liability which might be imposed under
         the  prevailing  rule among the states of the United States of America,
         unless  insurance  reasonably  satisfactory  to the  Owner  Participant
         covering  such risk is  provided  by the Lessee or a  Sublessee  at its
         expense,

                  (xii) any export  licenses and  certificate of  deregistration
         required in connection with any  repossession or return of the Aircraft
         will be readily  obtainable in the normal course without material delay
         or material  burden on the Owner Trustee or the Indenture  Trustee,  it
         being agreed that the Lessee shall be responsible for the cost thereof,

                  (xiii) the laws of such country  require fair  compensation by
         the government of such country payable in currency  freely  convertible
         into Dollars for the loss of use of the Aircraft  (unless the Lessee or
         a Sublessee shall have provided  insurance  reasonably  satisfactory to
         the Owner  Participant  covering the risk of  requisition of use of the
         Aircraft by the  government  of such country so long as the Aircraft is
         registered under the laws of such country), and

                  (xiv)  the  Owner  Participant,  the  Owner  Trustee,  and the
         Indenture  Trustee  shall have  received  opinions  in scope,  form and
         substance  reasonably  satisfactory to them, of counsel,  expert in the
         laws of the United States and such country,  to the effect set forth in
         clauses (iii), (iv), (vi), (viii), (ix), (x), (xii), (xiii) and, if the
         insurance  described  in such clause is not provided by the Lessee or a
         Sublessee,  clause (xi) and to such further effect with respect to such
         other  matters  as the Owner  Participant,  the Owner  Trustee,  or the
         Indenture Trustee may reasonably request.

         Lessee agrees to pay on an After-Tax Basis all reasonable out-of-pocket
         costs and expenses (including,  without limitation,  reasonable counsel
         fees and  disbursements) of the Owner  Participant,  the Owner Trustee,
         and the  Indenture  Trustee  in  connection  with  any  re-registration
         pursuant to this Section.

                  At any time and from time to time  during the Term,  the Owner
         Participant  may  request in writing to the  Lessee,  or the Lessee may
         request in writing to the Owner  Participant,  that  Exhibit E-1 to the
         Lease be amended to delete, or in the case of a request from the Lessee
         be amended to add, one or more  countries on such Exhibit and specified
         in such request, such request to be based upon the reasonable belief by
         the Owner  Participant that changes have occurred after the date hereof
         regarding each such country that could  adversely  affect its interests
         in the  Operative  Documents  or the  Aircraft,  if the  Aircraft  were
         registered  in such  country,  or in the  case of a  request  from  the
         Lessee,  based upon the reasonable  belief of the Lessee that each such
         country   would   adequately   protect  the   interests  of  the  Owner
         Participant,  the  Owner  Trustee,  and the  Indenture  Trustee  in the
         Operative  Documents and the Aircraft  (including,  without limitation,
         having the  characteristics  of and meeting the requirements  specified
         above with respect to the  countries  listed on such  Exhibit),  if the
         Aircraft  were to be registered  in such  country.  Promptly  after the
         receipt of such  request  (and in any event  within ten  Business  Days
         thereof),  the  Lessee  shall  consult  in good  faith  with the  Owner
         Participant as to whether each such country should be so deleted, or as
         to whether such country  should be added,  as the case may be, and each
         party hereto  agrees not to  unreasonably  withhold its consent to such
         request.  In the event that the Lessee and the Owner  Participant shall
         agree as to the deletion or addition of any such country,  such Exhibit
         shall be deemed amended to reflect such agreement (such agreement to be
         so  evidenced  by  a  writing  signed  by  the  Lessee  and  the  Owner
         Participant,  but without the requirement of any action or signature by
         any other Person; otherwise, such Exhibit shall not be so amended.

                  (c) The Lessee shall promptly file any reports,  or furnish to
         the Owner Trustee and the Owner  Participant such information as may be
         required to enable the Owner Trustee and the Owner  Participant  timely
         to file any reports  required  to be filed by the Owner  Trustee as the
         Lessor and the Owner  Participant under the Lease with any governmental
         authority.

                  (d) The Lessee  will  cause the  Special  Aviation  Counsel to
         file, and where appropriate record, on the Delivery Date, the Old Lease
         Termination  (if the Old Lease was filed of record  with the FAA),  the
         FAA Bill of Sale, the Lease (including the Lease Supplement), the Trust
         Agreement, and the Indenture (including the Indenture Supplement).  The
         following documents shall be filed and, where appropriate,  recorded on
         the Delivery Date with the Aeronautics Authority in the following order
         of priority:  first,  the Old Lease  Termination  (if the Old Lease was
         filed of record with the FAA), second, the FAA Bill of Sale, third, the
         Application,  with the Trust Agreement and the Affidavits,  fourth, the
         Indenture with the Indenture  Supplement  attached thereto,  and fifth,
         the Lease with the Lease Supplement,  the Indenture,  and the Indenture
         Supplement attached thereto. So long as the Aircraft remains subject to
         the Lien of the Indenture,  the Lessee will cause the Special  Aviation
         Counsel,  or other  counsel  reasonably  satisfactory  to the Indenture
         Trustee,  to deliver to the  Indenture  Trustee an annual legal opinion
         regarding the continuing perfection of the Lien under the Indenture.

                  (e) The  Lessee  shall at all  times  maintain  its  corporate
         existence  except as permitted by Section 6.03(f) hereof and all of its
         rights,  privileges and  franchises  necessary in the normal conduct of
         its business,  except for any corporate  right,  privilege or franchise
         (i)  that  it  determines,  in  its  reasonable,  good  faith  business
         judgment,  is no longer  necessary  or  desirable in the conduct of its
         business  and  (ii) the loss of  which  will not  materially  adversely
         affect or diminish the rights of the Holders or the Owner Participant.

                  (f)  Neither  the  Lessee  nor ACA Inc.  shall  enter into any
         merger with or into or consolidation  with, or sell, convey,  transfer,
         lease or otherwise dispose of in one or a series of transactions all or
         substantially  all of its assets as an entirety  to any Person,  unless
         the  surviving  corporation  or  Person  which  acquires  by  purchase,
         conveyance, transfer or lease all or substantially all of the assets of
         the Lessee as an entirety (i) is a domestic  corporation  organized and
         existing under the laws of the United States or any State of the United
         States (ii) is a Citizen of the United States,  (iii) is a Section 1110
         Person, (iv) if not the Lessee or ACA Inc., executes a duly authorized,
         legal,   valid,   binding,   and  enforceable   agreement,   reasonably
         satisfactory   in  form  and  substance  to  Owner  Trustee  and  Owner
         Participant,  containing an effective assumption of all of the Lessee's
         or ACA Inc.'s, as applicable, obligations hereunder and under the other
         Operative  Agreements,  and each other document  contemplated hereby or
         thereby and delivers  such  instrument to the  Indenture  Trustee,  the
         Owner  Participant and the Owner Trustee,  (v) provides an opinion from
         outside counsel  delivered to the Owner Trustee,  the Indenture Trustee
         and  the  Owner   Participant,   which   counsel  shall  be  reasonably
         satisfactory  to the Owner  Participant  and the Indenture  Trustee and
         which opinion shall be reasonably satisfactory to the Owner Participant
         and the Indenture Trustee, and an officer's  certificate,  each stating
         that such merger, consolidation,  conveyance,  transfer, lease or other
         disposition  and the instrument  noted in clause (iv) above comply with
         this  Section  6.03(f),  that  such  instrument  is a legal,  valid and
         binding  obligation  of, and is enforceable  against,  such survivor or
         Person, and that all conditions  precedent herein provided for relating
         to such  transaction  have been complied with, (vi)  immediately  after
         such merger,  consolidation  or conveyance,  transfer or lease,  as the
         case may be,  the  surviving  company  (or  Person  which  acquires  by
         conveyance, transfer or lease the assets of the Lessee) has a net worth
         not less  than the  lesser  of (A) the net  worth of the  Lessee on the
         Delivery  Date and (B) 75% of the net worth of the  Lessee  immediately
         prior to such merger, consolidation, conveyance, transfer or lease; and
         (vii) such  survivor or Person makes such filings and  recordings  with
         the FAA as are required pursuant to part A of subtitle VII or Title 49,
         United States Code to evidence such merger or  consolidation;  provided
         that no such merger,  consolidation  or  conveyance,  transfer or lease
         shall  be  permitted  if,  immediately  after  giving  effect  to  such
         consolidation,  merger, purchase, conveyance,  transfer, lease or other
         disposition, no Event of Default shall have occurred and be continuing.

                  Upon any consolidation or merger, or any conveyance,  transfer
         or lease of all or  substantially  all of the  assets of the Lessee and
         the  satisfaction of the conditions  specified in this Section 6.03(f),
         the successor  corporation  formed by such  consolidation or into which
         the Lessee is merged or the Person to which such  conveyance,  transfer
         or lease is made shall  succeed  to, and be  substituted  for,  and may
         exercise  every right and power of, the Lessee under this Agreement and
         the Lease and each other  Operative  Agreement  and any other  document
         contemplated hereby and thereby to which the Lessee is a party with the
         same  effect as if such  successor  corporation  had been  named as the
         Lessee herein and therein. No such conveyance, transfer or lease of all
         or  substantially  all of the assets of the Lessee as an entirety shall
         have the effect of releasing  the Lessee or any  successor  corporation
         which shall  theretofore have become the Lessee hereunder in the manner
         prescribed  in this  Section  6.03(f) from its  liability  hereunder or
         under the other Operative  Agreements.  Nothing  contained herein shall
         permit any lease, sublease, or other arrangement for the use, operation
         or possession of the Aircraft  except in compliance with the applicable
         provisions of the Lease.

                  (g) The Lessee  agrees to give  prompt  written  notice to the
         Owner  Participant,  the Owner Trustee and the Indenture Trustee of any
         change in the  address of its chief  executive  office (as such term is
         used in Section 9-103(3) of the Virginia Uniform Commercial Code) or of
         any change in its corporate name.

                  (h) The Lessee agrees to furnish to the Owner  Participant and
the Indenture Trustee:

                           (A) as soon as available, but in any event within 120
                  days  after  the  end of  each  fiscal  year  of ACA  Inc.,  a
                  consolidated  balance sheet as of the end of such fiscal year,
                  and the  related  consolidated  statements  of income,  common
                  stockholders' equity,  retained earnings and cash flows of ACA
                  Inc. for the fiscal year then ended as prepared and  certified
                  by  ACA  Inc.'s  independent   certified  public  accountants,
                  including  their  certificate  and  accompanying  comments and
                  opinion;

                           (B) within 60 days after the end of the first, second
                  and third quarterly  accounting periods in each fiscal year of
                  ACA Inc., a consolidated balance sheet of ACA Inc. prepared by
                  it as of  the  close  of the  accounting  period  then  ended,
                  together with the related  consolidated  statements of income,
                  retained  earnings and cash flows for such  accounting  period
                  certified by the chief accounting  officer or a financial vice
                  president of ACA Inc.;

                           (C) promptly upon their general transmission,  copies
                  of all reports  and  statements  furnished  by ACA Inc. to its
                  stockholders;

                           (D) promptly after filing with the SEC, copies of ACA
                  Inc.'s annual reports on form 10-K,  quarterly reports on form
                  10-Q,  and,  if  requested,   any  registration  statement  or
                  prospectus  filed by ACA Inc. with any securities  exchange or
                  the SEC;

                           (E)  promptly  upon  (and in any  event  within  five
                  Business  Days  after) any  officer  of the  Lessee  obtaining
                  knowledge of any condition or event which constitutes an Event
                  of Default, an officer's certificate specifying the nature and
                  period of  existence  thereof  and what  action the Lessee has
                  taken or is taking or proposes to take with  respect  thereto;
                  and

                           (F)  from  time  to  time,   such   other   financial
                  information  as  the  Lessor,  the  Owner  Participant  or the
                  Indenture Trustee may reasonably request.

         Concurrently with the delivery of the financial  statements referred to
in  clause  (A)  above,  the  Lessee  shall  deliver  to the  Lessor,  the Owner
Participant, the Indenture Trustee and the Pass-Through Trustee a certificate of
the Lessee, signed by any one of the President, the Chief Financial Officer, the
General  Counsel,  the  Treasurer  or the  principal  accounting  officer of the
Lessee,  stating that the signer, or an employee  reporting to same, is familiar
with the  relevant  terms of this  Agreement  and the Lease and the  signer  has
reviewed,  or has caused to be made under such Person's supervision a review, of
the activities of the Lessee and that, to the best of his or her  knowledge,  no
Default exists, or if a Default does exist,  specifying the nature thereof,  the
period of existence thereof, and what action the Lessee has taken or proposes to
take with respect thereto.

         Section  6.04.   Survival  of  Representations   and  Warranties.   The
representations  and warranties of the Lessee provided in Sections 6.01 and 6.02
hereof  and in  any  other  Operative  Agreement  and  the  representations  and
warranties  of ACA  Inc.  provided  in  Section  6.04  hereof  and is any  other
Operative Agreement shall survive the Closings hereunder and the delivery of the
Aircraft and the expiration or other termination of this Agreement and the other
Operative Agreements.



                                    ARTICLE 7

            OTHER PARTIES' REPRESENTATIONS, WARRANTIES AND COVENANTS

         Section 7.01.  Reserved.

         Section 7.02.  Citizenship.  (a) Generally.  The Owner Trustee,  in its
individual  capacity and as trustee,  represents  and warrants that it is and on
the Delivery Date will be a Citizen of the United  States.  If the Owner Trustee
in its individual capacity does not comply with the requirements of this Section
7.02,  the Owner Trustee and the Indenture  Trustee hereby agree that no Default
shall  be  deemed  to  exist  due to  non-compliance  by  the  Lessee  with  the
registration  requirements in the Lease or in Section 6.03(b) hereof  occasioned
by such the noncompliance of the or the Owner Trustee.

         (b) Owner  Trustee.  The Owner  Trustee,  in its  individual  capacity,
covenants that if at any time on or after the Delivery Date it shall have actual
knowledge  that it has  ceased to be a Citizen  of the  United  States,  it will
resign  immediately  as the Owner Trustee if such  citizenship  is necessary for
registration   of  the   Aircraft  in  the  Owner   Trustee's   name  under  the
Transportation  Code as in effect at such time (such  necessity to be determined
without regard to any provision of law that permits the U.S. registration of the
Aircraft by  restricting  where it is based or used) or, if it is not  necessary
for such  registration,  if the Owner  Trustee  is  informed  in  writing by the
Lessee,  the Indenture Trustee or any Owner Participant that such lack of United
States  citizenship  would have any adverse effect on the Lessee,  the Indenture
Trustee,  the  Holders  or any  Owner  Participant.  The Owner  Trustee,  in its
individual capacity, further covenants that if at any time it appears reasonably
probable  that it will  cease to be a  Citizen  of the  United  States  based on
information  that is (i) known to a Responsible  Officer or (ii) generally known
to the public,  it will promptly so notify,  to the extent permitted by law, all
parties to this Agreement.

         Section 7.03.  Concerning Assignment of Interests of Owner Participant.
In connection  with the transfer by an Owner  Participant to a transferee  Owner
Participant,  the Owner Trustee,  the Lessee and the Indenture  Trustee shall be
entitled to receive an opinion or opinions of counsel reasonably satisfactory to
each of them to the effect that the  obligations  of such  transferee  under the
Operative  Agreements are legal,  valid,  binding and  enforceable in accordance
with their terms, subject to customary  exceptions,  and that such transfer will
not be required to be registered under applicable securities laws.

         Section 7.04. Representations,  Covenants and Warranties of SSB and the
Owner Trustee. (a) In addition to and without limiting its other representations
and warranties  provided for in this Article 7, SSB represents and warrants,  in
its individual  capacity with respect to items (i), (ii),  (iii)(A),  (iv), (v),
(vi),  and (vii) below,  and as the Owner Trustee with respect to items (iii)(B)
and (iv) on the  date  hereof  and as of the  Certificate  Closing  Date and the
Delivery Date that:

                  (i) it is a national  banking  association  duly organized and
         validly  existing in good standing  under the laws of the United States
         of America with its  principal  place of business  and chief  executive
         office (as such terms are used in Article 9 of the  Uniform  Commercial
         Code) in  Hartford,  Connecticut,  and has  full  corporate  power  and
         authority,  in its individual capacity or (assuming the Trust Agreement
         has  been  duly  authorized,   executed  and  delivered  by  the  Owner
         Participant) as the Owner Trustee,  as the case may be, to carry on its
         business as now  conducted,  and to execute,  deliver and perform  this
         Agreement  and the  Operative  Agreements  to which it is or is to be a
         party;

                  (ii) the execution, delivery and performance by SSB, either in
         its individual capacity or as the Owner Trustee, as the case may be, of
         this Agreement and the Operative  Agreements to which it is or is to be
         party have been duly  authorized by all necessary  corporate  action on
         its part, and do not contravene its articles of association or by-laws;
         each of this Agreement and the other  Operative  Agreements to which it
         is or is to be a party  has been  duly  authorized,  and has been  duly
         executed  and  delivered  or, in the case of the  Operative  Agreements
         identified in Section 4.02(c) hereof, will on the Delivery Date be duly
         executed and delivered by SSB, either in its individual  capacity or as
         the Owner  Trustee,  as the case may be, and neither the  execution and
         delivery  thereof nor SSB  performance of or compliance with any of the
         terms and  provisions  thereof will violate any federal or  Connecticut
         law or regulation governing SSB's banking or trust powers,

                  (iii) (A) assuming due  authorization,  execution and delivery
         by each other party thereto,  each of the Operative Agreements to which
         it is or is to be party when duly executed and  delivered  will, to the
         extent  each such  document  is entered  into by SSB in its  individual
         capacity,  constitute the legal, valid and binding obligation of SSB in
         its  individual  capacity  enforceable  against it in such  capacity in
         accordance with its respective terms, except as such enforceability may
         be limited by bankruptcy,  insolvency,  reorganization or other similar
         laws or equitable principles of general application to or affecting the
         enforcement of creditors' rights (regardless of whether  enforceability
         is considered in a proceeding in equity or at law), and the performance
         by SSB in its individual capacity of any of its obligations  thereunder
         does not  contravene any lease,  regulation or contractual  restriction
         binding on SSB in its individual capacity;

                  (B) assuming due authorization, execution and delivery by each
         other party thereto, each of the Operative Agreements to which it is or
         is to be party when duly  executed and  delivered  will,  to the extent
         each such  document is entered  into by the Owner  Trustee in its trust
         capacity,  constitute  the legal,  valid and binding  obligation of the
         Owner  Trustee  enforceable  against it in such  capacity in accordance
         with its respective terms, except as such enforceability may be limited
         by  bankruptcy,  insolvency,  reorganization  or other  similar laws or
         general equitable principles,  and the performance by the Owner Trustee
         of any of its  obligations  thereunder  does not  contravene any lease,
         regulation or contractual restriction binding on the Owner Trustee;

                  (iv) there are no  pending  or, to its  knowledge,  threatened
         actions or proceedings  against SSB before any court or  administrative
         agency  which  would  materially  adversely  affect the ability of SSB,
         either in its individual  capacity or as the Owner Trustee, as the case
         may be, to perform its  obligations  under the Operative  Agreements to
         which it is or is to be party;

                  (v) it shall give the Lessee,  the  Indenture  Trustee and the
         Owner  Participant  at least 30 days' prior written notice in the event
         of any change in its chief executive office or name;

                  (vi) neither the  execution  and delivery by it, either in its
         individual capacity or as the Owner Trustee, as the case may be, of any
         of  the  Operative  Agreements  to  which  it is  or is to be a  party,
         requires  on the part of SSB in its  individual  capacity or any of its
         Affiliates  the  consent or approval of or the giving of notice to, the
         registration with, or the taking of any other action in respect of, any
         federal or Connecticut  governmental  authority or agency governing its
         banking or trust powers; and

                  (vii) on the  Certificate  Closing Date, the proceeds  arising
         from  the  issuance  and  sale  of the  Certificates  shall  be free of
         Lessor's Liens  attributable  to SSB in its individual  capacity and on
         the Delivery Date the Owner Trustee shall be holding  whatever title to
         the Aircraft as was conveyed to it by the Seller, the Aircraft shall be
         free of Lessor's Liens attributable to SSB in its individual  capacity,
         and SSB in its individual capacity is a Citizen of the United States.

                  (b) Lessor's Liens. SSB, in its individual  capacity,  further
         represents,  warrants and  covenants  that there are no Lessor's  Liens
         attributable  to it in its individual  capacity and that there will not
         be any such  Lessor's  Liens  on the  Certificate  Closing  Date or the
         Delivery  Date. The Owner Trustee,  in its trust  capacity,  and at the
         cost and  expense of the  Lessee,  covenants  that it will in its trust
         capacity promptly, and in any event within 30 days after the same shall
         first  become  known to it,  take such  action as may be  necessary  to
         discharge  duly any  Lessor's  Liens  attributable  to it in its  trust
         capacity. SSB, in its individual capacity, covenants and agrees that it
         will at its own expense  take such action as may be  necessary  to duly
         discharge  and satisfy in full,  promptly,  and in any event  within 30
         days after the same shall first become known to it, any Lessor's  Liens
         attributable  to it in its  individual  capacity which may arise at any
         time after the date of this Agreement.

                  (c)  Indemnity  for  Lessor's  Liens.  SSB, in its  individual
         capacity,  agrees  to  indemnify  and hold  harmless  the  Lessee,  the
         Indenture Trustee,  the Owner Participant and the Pass-Through  Trustee
         and the Owner  Trustee  from and  against  any loss,  cost,  expense or
         damage which may be suffered by the Lessee, the Indenture Trustee,  the
         Owner Participant,  the Pass-Through  Trustee or the Owner Trustee as a
         result of the failure of SSB to  discharge  and  satisfy  any  Lessor's
         Liens  attributable to it in its individual  capacity,  as described in
         Section 7.04(b) hereof.

                  (d)  Securities  Act.  None of SSB,  the Owner  Trustee or any
         Person  authorized  by either of them to act on its behalf has directly
         or indirectly  offered or sold or will directly or indirectly  offer or
         sell any interest in the Lessor's  Estate,  or in any similar  security
         relating to the  Lessor's  Estate,  or in any  security the offering of
         which for purposes of the Securities Act of 1933, as amended,  would be
         deemed  to be  part  of  the  same  offering  as  the  offering  of the
         aforementioned  securities to, or solicited any offer to acquire any of
         the same from, any Person.

                  (e) Actions With Respect to Lessor's Estate, Etc. Neither SSB,
         in its individual capacity,  nor the Owner Trustee will take any action
         to subject the Lessor's  Estate or the trust  established  by the Trust
         Agreement,  as debtor, to the reorganization or liquidation  provisions
         of the Bankruptcy Code or any other applicable bankruptcy or insolvency
         statute.

                  (f) Actions With Respect to Lease.  The Owner Trustee will not
         assign any of its rights  under the Lease  without  the  consent of the
         Owner Participant,  which consent will not be unreasonably  withheld or
         delayed.

         Section 7.05.  Representations,  Warranties  and Covenants of the Indenture  Trustee.  (a)  The  Indenture
Trustee in its individual  capacity  represents on the date hereof and as of the  Certificate  Closing Date and the
Delivery Date as follows:

                  (i) it is a national  banking  association  duly organized and
         validly  existing in good standing  under the laws of the United States
         of America  and has the power and  authority  to enter into and perform
         its  obligations  under the  Indenture,  this  Agreement  and the other
         Operative  Agreements  to which it is a party and to  authenticate  the
         Certificates to be delivered on the Certificate Closing Date;

                  (ii) the Indenture and this Agreement and the other  Operative
         Agreements to which it is or is to be a party,  and the  authentication
         of the  Certificates to be delivered on the  Certificate  Closing Date,
         have been duly  authorized  by all  necessary  corporate  action on its
         part,   and  neither  the  execution  and  delivery   thereof  nor  its
         performance of any of the terms and provisions thereof will violate any
         federal or Maryland law or regulation  relating to its banking or trust
         powers or  contravene  or result in any  breach of, or  constitute  any
         default under, its articles of association or by-laws;

                  (iii) each of the Indenture and this Agreement,  and the other
         Operative  Agreements to which it is or is to be a party, has been duly
         executed  and  delivered  or, in the case of the  Operative  Agreements
         identified  in Section  4.02(c)  hereof,  will on the Delivery  Date be
         executed and delivered by it and,  assuming that each such agreement is
         the legal, valid and binding obligation of each other party thereto, is
         (or  will  be,  as the  case may be),  the  legal,  valid  and  binding
         obligation of the Indenture Trustee,  enforceable against the Indenture
         Trustee in accordance with its terms except as such  enforceability may
         be limited by bankruptcy,  insolvency,  reorganization or other similar
         laws or equitable principles of general application to or affecting the
         enforcement of creditors ' rights (regardless of whether enforceability
         is considered in a proceeding in equity or at law);

                  (iv) neither the execution and delivery by it of the Indenture
         and this Agreement and the other Operative Agreements to which it is or
         is to be a party,  nor the performance by it of any of the transactions
         contemplated  hereby or thereby,  requires  the consent or approval of,
         the giving of notice to, the  registration  with,  or the taking of any
         other action in respect of, any Federal or state governmental authority
         or agency governing its banking and trust powers; and

                  (v) on the  Certificate  Closing Date,  the Indenture  Trustee
         holds the Liquid  Collateral  on behalf of the Owner Trustee and on the
         Delivery   Date,   the   Indenture   Trustee  will  hold  the  original
         counterparts of the Lease and the Lease Supplement.

         (b) Indenture Trustee's Liens. The Indenture Trustee, in its individual
capacity, further represents, warrants and covenants that there are no Indenture
Trustee's  Liens  attributable  to it in its individual  capacity and that there
will not be any Indenture Trustee's Liens on the Certificate Closing Date or, as
at and following the Delivery Date, the Aircraft.  The Indenture Trustee, in its
individual  capacity,  covenants and agrees that it will at its own expense take
such action as may be necessary to duly discharge and satisfy in full, promptly,
and in any event within 30 days,  after the same shall first become known to it,
any Indenture Trustee's Liens.

         (c) Indemnity for Indenture  Trustee's Liens. The Indenture Trustee, in
its individual  capacity,  agrees to indemnify and hold harmless the Lessee, the
Owner  Participant,  the Owner  Trustee and the  Pass-Through  Trustee  from and
against any loss,  cost,  expense or damage which may be suffered by the Lessee,
the  Indenture  Trustee,  the  Owner  Participant,  the  Owner  Trustee  or  the
Pass-Through  Trustee  as a result of the  failure of the  Indenture  Trustee to
discharge and satisfy any Indenture  Trustee's  Liens  attributable to it in its
individual capacity, as described in Section 7.05(b) hereof.

         Section  7.06.  Indenture  Trustee's  Notice of Default.  The Indenture
Trustee agrees to give the Owner  Participant  notice of any Default or Event of
Default  promptly upon a Responsible  Officer of the  Indenture  Trustee  having
actual knowledge thereof.

         Section 7.07. Releases from Indenture.  The Indenture Trustee covenants
and agrees, for the benefit of the Lessee and the Owner Participant,  to execute
and deliver the  instruments of release from the Lien of the Indenture  which it
is required to execute and deliver in accordance  with the provisions of Article
XIV of the Indenture,  and the Owner Participant  agrees, for the benefit of the
Lessee,  to cause the Owner Trustee to request the Indenture  Trustee to execute
and deliver such  instruments  of release upon written notice from the Lessee to
make such request.

         Section  7.08.   Covenant  of  Quiet  Enjoyment.   Each  of  the  Owner
Participant,  the  Indenture  Trustee,  the  Pass-Through  Trustee and the Owner
Trustee  covenants  and agrees as to itself  only  that,  so long as no Event of
Default  under the Lease  has  occurred  and is  continuing,  neither  the Owner
Participant  (or the Owner Trustee,  the  Pass-Through  Trustee or the Indenture
Trustee,  as the case may be) nor any Person lawfully claiming through the Owner
Participant  (or the Owner Trustee,  the  Pass-Through  Trustee or the Indenture
Trustee,  as the case may be) shall interfere with the Lessee's right quietly to
enjoy the Aircraft during the Term without hindrance or disturbance by the Owner
Participant  (or the Owner Trustee,  the  Pass-Through  Trustee or the Indenture
Trustee, as the case may be).

         Section 7.09.  Pass-Through  Trustee's  Representations and Warranties.
The  Pass-Through  Trustee,  in its individual  capacity (except with respect to
clause (iii) below),  represents  and warrants as of the date hereof  (except as
otherwise  provided),  as of the  Pass-Through  Closing  Date,  the  Certificate
Closing Date and the Delivery Date that:

                  (i) it is a national  banking  association  duly organized and
         validly  existing in good standing  under the laws of the United States
         of America  and has the power and  authority  to enter into and perform
         its  obligations   under  the   Pass-Through   Agreement,   the  Series
         Supplements,  the  Intercreditor  Agreement  and this  Agreement and to
         execute and authenticate the Pass-Through  Certificates to be delivered
         on the Pass-Through Closing Date;

                  (ii)  the   execution,   delivery  and   performance  of  this
         Agreement,  the Pass-Through  Agreement and the Series  Supplements and
         the performance of its obligations  hereunder and thereunder (including
         the execution and authentication of the Pass-Through Certificates to be
         delivered on the Pass-Through  Closing Date) have been fully authorized
         by  all  necessary  corporate  action  on its  part,  and  neither  the
         execution and delivery  thereof nor its performance of any of the terms
         and  provisions  thereof  will  violate any federal or Maryland  law or
         regulation  relating to its banking or trust  powers or  contravene  or
         result in any breach of, or  constitute  any default under its articles
         of association, or bylaws or the provisions of any indenture, mortgage,
         contract  or other  agreement  to which it is a party or by which it or
         its properties may be bound or affected; and

                  (iii) each of this  Agreement and the  Pass-Through  Agreement
         has  been,  and  as  of  the  Pass-Through   Closing  Date  the  Series
         Supplements  will  be,  duly  executed  and  delivered  by it  (in  its
         individual and trust capacities) and, assuming that each such agreement
         is the legal, valid and binding obligation of each other party thereto,
         is or will  be,  as the case  may be,  the  legal,  valid  and  binding
         obligation of the  Pass-Through  Trustee (in its  individual  and trust
         capacities), enforceable in accordance with its respective terms except
         as limited by bankruptcy,  insolvency,  moratorium,  reorganization  or
         other similar laws or equitable principles of general application to or
         affecting the enforcement of creditors' rights generally (regardless of
         whether such  enforceability is considered in a proceeding in equity or
         at law).

         Section 7.10.  Survival of  Representations,  Warranties and Covenants.
The  representations,  warranties  and covenants of the Owner  Participant,  the
Owner Trustee (in its individual or trust capacity),  the  Pass-Through  Trustee
(in its individual or trust capacity),  the Indenture Trustee (in its individual
or trust  capacity)  and the  Subordination  Agent (in its  individual  or trust
capacity) provided for in this Article 7, and their respective obligations under
any and all of them,  shall survive the  Closings,  the delivery of the Aircraft
and the  expiration  or  other  termination  of this  Agreement,  and the  other
Operative Agreements.

         Section 7.11. Lessee's  Assumption of the Certificates.  (a) Subject to
compliance  by the  Lessee  with  all of its  obligations  under  the  Operative
Agreements,  each of the Owner  Participant,  the Owner  Trustee,  the Indenture
Trustee,  the Pass Through  Trustee and the Lessee  covenants and agrees that if
the  Lessee  elects  to  purchase  the  Aircraft  pursuant  to the  terms of the
Operative Agreements,  if no Event of Default shall exist, then, upon compliance
with the applicable  provisions of the Operative  Agreements,  the Owner Trustee
will  transfer to the  Lessee,  without  recourse or warranty  (except as to the
absence of Lessor's Liens  attributable to the Owner Trustee) but subject to the
Lien of the Indenture,  all of the Owner Trustee's right,  title and interest in
and to the Aircraft, and if the Lessee, in connection with such purchase, elects
to assume the obligations of the Owner Trustee to the Indenture  Trustee and the
Holders under the Indenture,  the Certificates,  and hereunder,  then the Lessee
shall so notify the  Indenture  Trustee (such notice to be given at least 30 and
not more than 60 days prior to the effective date of such assumption),  and each
of the parties shall execute and deliver  appropriate  documentation  permitting
the  Lessee to assume  such  obligations  on the basis of full  recourse  to the
Lessee,  maintaining for the benefit of the Holders the security interest in the
Aircraft  created by the Indenture,  and upon  compliance with the provisions of
this Section 7.11 releasing the Owner Participant and the Owner Trustee from all
obligations in respect of the Certificates,  the Indenture,  this Agreement, and
the other Operative  Agreements,  except any obligations  relating to the period
prior  to such  assumption  and take all such  other  actions,  at the  Lessee's
expense, as are reasonably necessary to permit such assumption by the Lessee.

         (b)      In connection with such assumption:

                  (i) the Lessee  shall  execute and deliver an  instrument  (A)
         pursuant to which the Lessee  irrevocably and  unconditionally  assumes
         and undertakes,  with full recourse to the Lessee, to pay, satisfy, and
         discharge  when  and  as  due  (at  the  stated  maturity  thereof,  by
         acceleration  or otherwise) the principal of,  Make-Whole  Premium,  if
         any, interest, and all other sums owing on all Outstanding Certificates
         (or on the Lessee's  substituted  obligations) in accordance with their
         terms,  and  punctually to perform and observe all of the covenants and
         obligations  hereunder and under the Indenture and the Certificates (as
         the same may be  amended  in  connection  with such  assumption)  to be
         performed  or observed  by the Owner  Trustee,  and (B) which  contains
         amendments  to the  Indenture,  in form  and  substance  as  reasonably
         satisfactory to the Indenture  Trustee,  that incorporate  therein such
         provisions  from the Lease and this  Agreement  as may be  appropriate,
         including,   without  limitation,   events  of  default   substantially
         identical  in scope  and  effect  to those  set  forth in the Lease and
         covenants  substantially  identical  to the  covenants  of  the  Lessee
         hereunder and under the Lease;

                  (ii)  the  instrument  referred  to in  paragraph  (i) of this
         Section  7.11(b),  any Uniform  Commercial  Code  financing  statements
         relating thereto,  and any other documents which shall be necessary (or
         reasonably  requested  by  the  Indenture  Trustee)  to  establish  the
         Lessee's  title to and  interest  in the  Aircraft  or to  reflect  the
         substitution  of the Lessee for the Owner  Trustee  under the Operative
         Agreements or to continue the  perfection of the security  interests in
         the Aircraft and the other, rights, Property, and interests included in
         the Trust  Indenture  Estate  for the  benefit of the  Holders  (or the
         Lessee's substituted  obligations) shall be filed in such form, manner,
         and  places as are  necessary  or,  in the  reasonable  opinion  of the
         Indenture Trustee, advisable for such purpose;

                  (iii) the  Indenture  Trustee shall have received an insurance
         report dated the effective  date of such  assumption of an  independent
         insurance  broker  and  certificates  of  insurance,  each in form  and
         substance  satisfactory  to  the  Indenture  Trustee,  as  to  the  due
         compliance as of the effective date of such  assumption  with the terms
         of Article 1 3 of the Lease (as it relates  to the  Indenture  Trustee)
         relating to the insurance with respect to the Aircraft;

                  (iv) the Indenture  Trustee shall have received  evidence that
         as of  the  effectiveness  of  the  assignment  on  the  date  of  such
         assumption  the  Aircraft is free and clear of all Liens other than the
         Lien of the Indenture and other Permitted Liens;

                  (v) the  Indenture  Trustee  shall have received a certificate
         from the  Lessee  that no Event of Default  exists as of the  effective
         date of such assumption;

                  (vi) the  Indenture  Trustee shall have received a guaranty of
         the Certificates substantially in the form of the ACA Guaranty; and

                  (vii) the  Indenture  Trustee  shall  have  received  (A) from
         counsel  for the Lessee  (who may be the  Lessee's  General  Counsel) a
         legal opinion, in form and substance as reasonably  satisfactory to the
         Indenture Trustee: (w) with respect to the compliance of the assumption
         contemplated  hereby with the terms hereof, (x) with respect to the due
         authorization, execution, delivery, validity, and enforceability of the
         instrument  referred to in paragraph (i) of this Section  7.11(b),  (y)
         with respect to the  continued  perfection  of the first and prior Lien
         and security interest in the Aircraft for the benefit of the Holders of
         the Certificates (or the Lessee's substituted  obligations) referred to
         in paragraph (ii) of this Section 7.11(b),  and (z) with respect to the
         continued   availability  of  the  benefits  of  Section  1110  of  the
         Bankruptcy Code to the Indenture Trustee for the benefit of the Holders
         with respect to the Aircraft  after giving  effect to such  assumption,
         (B) from counsel to the Indenture Trustee and Special Aviation Counsel,
         a legal opinion comparable to the respective  opinions delivered on the
         Certificate Closing Date or the Delivery Date, as the case may be, with
         such changes therein as may be appropriate in light of such assumption,
         and (C) in the case of each  opinion  described  in  clause  (A) or (B)
         above,  covering such additional matters as the Indenture Trustee shall
         reasonably request.

         (c) The Lessee shall pay all reasonable expenses (including  reasonable
fees and expenses of counsel) of the Indenture Trustee,  the Owner Trustee,  the
Pass Through  Trustee,  each  Liquidity  Provider and the Owner  Participant  in
connection with such assumption.

         Section 7.12.  Indebtedness of Owner Trustee.  So long as the Indenture
is in effect, the Owner Trustee, not in its individual  capacity,  but solely as
trustee under the Trust Agreement, shall not incur any indebtedness for borrowed
money  except  as  expressly  contemplated  herein  or in  any  other  Operative
Agreement  (excluding  the Tax Indemnity  Agreement) and shall not engage in any
business or other activity other than the transactions contemplated herein or in
any other Operative  Agreement  (excluding the Tax Indemnity  Agreement) and all
necessary or appropriate activity related thereto.

         Section  7.13.  Compliance  with  Trust  Agreement,  Etc..  Each of the
Initial Owner  Participant,  SSB, and the Owner Trustee  agrees with the Lessee,
the Indenture Trustee, the Liquidity Providers and the Pass-Through Trustee that
so long as the Lien of the Indenture  shall be in effect it will (i) comply with
all of the  terms of the  Trust  Agreement  applicable  to it in its  respective
capacity,  the  noncompliance  with which would materially  adversely affect any
such party and (ii) not take any  action,  or cause any  action to be taken,  to
amend,  modify or  supplement  any other  provision of the Trust  Agreement in a
manner that would  materially  adversely affect any such party without the prior
written consent of such party. The Owner Trustee confirms for the benefit of the
Lessee,  the Indenture  Trustee,  the Liquidity  Providers and the  Pass-Through
Trustee  that it will  comply  with the  provisions  of  Article  2 of the Trust
Agreement. Notwithstanding anything else to the contrary in the Trust Agreement,
so long as the Lease remains in effect, the Initial Owner Participant agrees not
to  terminate  or revoke the trust  created by the Trust  Agreement  without the
consent  of the  Lessee.  If and so long as the  Indenture  shall  not have been
discharged the consent of the Indenture  Trustee shall also be required prior to
any  termination  or  revocation  of  such  trust  and in  addition,  the  Owner
Participant will, at the Lessee's expense, promptly and duly execute and deliver
to the  Indenture  Trustee such  documents  and  assurances  including,  without
limitation,  conveyances,  financing statements and continuation statements with
respect to financing  statements  and take such further  action as the Indenture
Trustee may from time to time reasonably  request in order to protect the rights
and remedies created or intended to be created in favor of the Indenture Trustee
under the Indenture and to create for the benefit of the  Certificate  Holders a
valid  first  priority  Lien with  respect  to, and a first and prior  perfected
security interest in, the Trust Indenture Estate.

         Section 7.14. Subordination Agent's Representations,  Warranties and Covenants.  (a)  Representations and
Warranties.  The  Subordination  Agent  represents  and  warrants  as of  the  date  hereof  (except  as  otherwise
provided), the Pass-Through Closing Date, the Certificate Closing Date, and the Delivery Date, that:

                  (i) it is a national  banking  association  duly organized and
         validly  existing in good standing  under the laws of the United States
         of America and has the corporate  power and authority to enter into and
         perform its obligations under this Agreement,  the Liquidity Facilities
         and the Intercreditor Agreement;

                  (ii)  the   execution,   delivery  and   performance  of  this
         Agreement,  each of the  Liquidity  Facilities  and  the  Intercreditor
         Agreement  and  the  performance  of  its  obligations   hereunder  and
         thereunder  have been  fully  authorized  by all  necessary,  corporate
         action on its part, and, neither the execution and delivery thereof nor
         its performance of any of the terms and provisions thereof will violate
         any federal or Maryland  law or  regulation  relating to its banking or
         trust powers or  contravene  or result in any breach of, or  constitute
         any  default  under  its  articles  of  association,  or  bylaws or the
         provisions of any indenture,  mortgage,  contract or other agreement to
         which it is a party or by  which it or its  properties  may be bound or
         affected;

                  (iii) each of this Agreement, the Liquidity Facilities and the
         Intercreditor Agreement has been duly executed and delivered by it and,
         assuming  that each such  agreement  is the  legal,  valid and  binding
         obligation of each other party thereto,  is or will be, as the case may
         be, the legal, valid and binding obligation of the Subordination Agent,
         enforceable in accordance  with its respective  terms except as limited
         by bankruptcy, insolvency, moratorium,  reorganization or other similar
         laws or equitable principles of general application to or affecting the
         enforcement of creditors' rights generally  (regardless of whether such
         enforceability is considered in a proceeding in equity or at law);

                  (iv)  there are no Taxes  payable by the  Subordination  Agent
         imposed by the State of Maryland or any political subdivision or taxing
         authority  thereof  in  connection  with the  execution,  delivery  and
         performance by the  Subordination  Agent of this Agreement,  any of the
         Liquidity  Facilities  or  the  Intercreditor   Agreement  (other  than
         franchise  or  other  taxes  based  on  or  measured  by  any  fees  or
         compensation  received by the Subordination Agent for services rendered
         in connection with the transactions  contemplated by the  Intercreditor
         Agreement or any of the Liquidity  Facilities),  and there are no Taxes
         payable by the Subordination  Agent imposed by the State of Maryland or
         any political  subdivision  thereof in connection with the acquisition,
         possession  or  ownership  by  the  Subordination  Agent  of any of the
         Certificates  other than  franchise or other taxes based on or measured
         by any fees or  compensation  received by the  Subordination  Agent for
         services  rendered in connection with the transactions  contemplated by
         the Intercreditor Agreement or any of the Liquidity Facilities);

                  (v) there are no pending or threatened  actions or proceedings
         against  the  Subordination  Agent  before any court or  administrative
         agency which individually or in the aggregate,  if determined adversely
         to  it,  would   materially   adversely   affect  the  ability  of  the
         Subordination  Agent to perform its  obligations  under this Agreement,
         the Intercreditor Agreement or any Liquidity Facility;

                  (vi) the  Subordination  Agent has not directly or  indirectly
         offered any  Certificate  for sale to any Person or solicited any offer
         to acquire any Certificates from any Person,  nor has the Subordination
         Agent  authorized  anyone  to act on its  behalf to offer  directly  or
         indirectly any  Certificate  for sale to any Person,  or to solicit any
         offer to acquire any Certificate from any Person; and the Subordination
         Agent is not in default under any Liquidity Facility; and

                  (vii) the  Subordination  Agent is not directly or  indirectly
         controlling,  controlled  by or under  common  control  with the  Owner
         Participant, the Owner Trustee, any Underwriter or the Lessee.

         (b)  Covenants.  (i) The  Subordination  Agent  agrees not to amend any
Liquidity  Facility  without  the  consent of the Lessee (so long as no Event of
Default  shall have  occurred and be  continuing)  and of the Owner  Participant
(such consents not to be unreasonably withheld or delayed).

         (ii) In connection  with the deposit in the applicable  Cash Account of
amounts drawn  pursuant to any Downgrade  Drawing or  Non-Extension  Drawing (as
defined in the Liquidity Facility) under a Liquidity Facility, the Subordination
Agent  agrees,  so long as no  Event  of  Default  shall  have  occurred  and be
continuing,  to pay to the Lessee promptly  following each Regular  Distribution
Date any  Investment  Earnings on the amount so  deposited  which  remain  after
application  of  such  Investment  Earnings  pursuant  to  Section  2.06 of such
Liquidity  Facility to the  interest  payable on such  Downgrade  Drawing  under
Section 3.07 of such Liquidity Facility.  Capitalized terms used in this Section
shall have the meanings specified in the Intercreditor Agreement.



                                    ARTICLE 8

                                      TAXES

         Section 8.01.  Lessee's  Obligation to Pay Taxes.  (a)  Generally.  The
Lessee  agrees  promptly  to pay  when  due,  and to  indemnify  and  hold  each
Indemnitee harmless from all license, recording,  documentary,  registration and
other fees and all taxes (including, without limitation, income, gross receipts,
sales, rental, use, value added, property (tangible and intangible), ad valorem,
excise and stamp  taxes),  fees,  levies,  imposts,  recording  duties,  duties,
charges, assessments or withholdings of any nature whatsoever, together with any
assessments,   penalties,   fines,   additions   to  tax  or  interest   thereon
(individually,  a "Tax," and collectively  called  "Taxes"),  however imposed or
asserted  (whether imposed upon any Indemnitee,  the Lessee,  all or any part of
the Aircraft, Airframe, any Engine or any Part or the Lessor's Estate, the Trust
Indenture  Estate,  Rent, the  Certificates or otherwise upon or with respect to
any  Operative  Agreement,  any payments  thereunder  or otherwise in connection
therewith), by any Federal, state or local government or taxing authority in the
United States,  or by any government or taxing authority of a foreign country or
of any political  subdivision or taxing  authority  thereof or by a territory or
possession of the United States or an international taxing authority relating to
or measured by:

                  (i)  the  construction,  mortgaging,  financing,  refinancing,
         purchase,  acceptance,  rejection,  delivery,  nondelivery,  transport,
         location,  ownership,  registration,  reregistration,   deregistration,
         insuring, assembly, possession, repossession,  operation, use, non-use,
         condition, maintenance, repair, improvement,  conversion, sale, return,
         abandonment,    preparation,    installation,    storage,   redelivery,
         replacement,   manufacture,   leasing,   subleasing,    sub-subleasing,
         modification,  alteration, rebuilding,  importation, transfer of title,
         transfer  of   registration,   exportation  or  other   application  or
         disposition of, or the imposition of any Lien (or the incurrence of any
         liability to refund or pay over any amount as a result of any Lien) on,
         the  Aircraft,  the  Airframe,  any Engine or any Part or any  interest
         therein;

                  (ii)     amounts payable under the Operative Agreements;

                  (iii) the Property,  or the income or other proceeds  received
         with  respect  to  the  Property   attributable  to  the   transactions
         contemplated  by the  Operative  Agreements,  held by the Owner Trustee
         under the Trust Agreement or after an Event of Default under the Lease,
         or by the Indenture Trustee under the Indenture;

                  (iv)  otherwise with respect to any Operative  Agreement,  any
         interest  therein  or by reason  of the  transactions  described  in or
         contemplated by the Operative Agreements;

                  (v)      the principal or interest or other amounts payable with respect to the Certificates;

                  (vi) the Pass-Through  Certificates or the Certificates or the
         issuance, sale, acquisition,  reoptimization, or refinancing thereof or
         the  beneficial  interests in the Trust  Estate or the Trust  Indenture
         Estate  or the  creation  thereof  under  the  Trust  Agreement  or the
         Indenture,  or the security interest created or perfected thereby or by
         any filing thereof;

                  (vii) any assumption by the Lessee pursuant to Section 7.11 of
this Agreement;

                  (viii)   the Aircraft, the Airframe, any Engine or any Part; or

                  (ix) the  rentals  (including  Basic  Rent,  Renewal  Rent and
         Supplemental  Rent),  receipts or earnings  arising from the  Operative
         Agreements.

         (b)      Exceptions.  The  indemnity  provided  for in  Section  8.01 (a) shall  not  extend to any of the
                  ----------
following:

                  (i) With respect to an Indemnitee,  Taxes,  whether imposed by
         withholding  or otherwise,  based upon,  measured by or with respect to
         the net or gross  income,  items of tax  preference  or minimum  tax or
         excess  profits,  receipts,  capital,  franchise,  net worth  (whether,
         denominated income,  excise, capital stock, or doing business taxes) or
         other  similarly-based  taxes  (other  than  sales,  use,  value-added,
         transfer,  rental,  ad  valorem,  stamp,  property,  or similar  taxes)
         ("Income Taxes") imposed by the United States or by any state, local or
         foreign jurisdiction in which such Indemnitee is subject to tax without
         regard to the  transactions  contemplated  by the Operative  Agreement,
         provided,  however,  that this  clause (i) shall not  exclude  from the
         indemnity  described in Section  8.01(a) above any such Income Taxes to
         the extent  such taxes are  imposed  by any  jurisdiction  in which the
         Indemnitee  would not be subject to such taxes of such type but for, or
         would be subject to such taxes of such type  solely as a result of, (x)
         the  operation,  registration,   location,  presence,  or  use  of  the
         Aircraft,   Airframe,   any  Engine  or  any  Part  thereof,   in  such
         jurisdiction or (y) the place of  incorporation  or principal office or
         the activities of the Lessee or any Affiliate  thereof or any sublessee
         in such  jurisdiction  (it being understood that (A) any such indemnity
         would be  payable  only to the extent of the net harm  incurred  by the
         Indemnitee from such Income Taxes,  taking into account any incremental
         current Tax benefit in another tax jurisdiction  resulting from payment
         of  such   Income   Taxes   and  (B)  this   sentence   would   require
         indemnification  in a  jurisdiction  in which the Indemnitee is already
         subject to an Income Tax (an  "Existing  Income  Tax") only if an event
         set forth in Clause (x) or (y) of this sentence  causes the  Indemnitee
         to be  subject  to an Income Tax in that  jurisdiction  (a "New  Income
         Tax") other than an Existing  Income Tax, and such New Income Tax would
         have been imposed even if the activities  contemplated by the Operative
         Agreements  were the  Indemnitee's  sole  nexus  to the  jurisdiction);
         provided,  further,  that  the  provisions  of  this  paragraph  (b)(i)
         relating to Income Taxes shall not exclude from the indemnity described
         in Section  8.01(a)  hereof any Income Taxes for which the Lessee would
         be required to indemnify an  Indemnitee  (x) so that any payment  under
         the Operative Agreements, otherwise required to be made on an After-Tax
         Basis,  is made on an  After-Tax  Basis  or (y)  pursuant  to the  last
         sentence of Section 8.02, 8.05, 9.02 or 9.05 of this Agreement;

                  (ii)     Taxes on items of tax preference or any minimum tax or alternative minimum tax;

                  (iii) Taxes imposed with respect to any period after the later
         of (A) the discharge in full of the Lessee's obligation, if any, to pay
         Stipulated Loss Value or Termination Value under and in accordance with
         the Lease,  and (B) the earliest of (x) the  expiration  of the Term of
         the Lease and return of the  Aircraft in  accordance  with Section 5 of
         the Lease,  (y) the  termination  of the Lease in  accordance  with the
         applicable  provisions  of the Lease  and  return  of the  Aircraft  in
         accordance  with the  Lease,  or (z) the  termination  of the  Lease in
         accordance with the applicable provisions of the Lease and the transfer
         of all right, title and interest in the Aircraft to the Lessee pursuant
         to its exercise of any of its purchase  options set forth in Section 16
         of the Lease,  provided  that this  exclusion  (iii) shall not apply in
         respect of any  payment  made after the dates set forth in clauses  (A)
         and (B) above if such  payment is made with respect to any period prior
         to such return or transfer,  or Taxes  incurred in connection  with the
         exercise of any remedies  pursuant to Section 15 of the Lease following
         the occurrence of an Event of Default;

                  (iv) As to the Owner Trustee,  Taxes imposed against the Owner
         Trustee upon or with  respect to any fees for services  rendered in its
         capacity  as Owner  Trustee  under  the Trust  Agreement  or, as to the
         Indenture Trustee,  Taxes imposed against the Indenture Trustee upon or
         with respect to any fees  received by it for  services  rendered in its
         capacity as Indenture Trustee under the Indenture;

                  (v) With respect to any  Indemnitee,  Taxes resulting from the
         willful  misconduct or gross  negligence of any Indemnitee  (other than
         gross  negligence or willful  misconduct not actually  committed by but
         instead  imputed  to any  Indemnitee  by  reason  of such  Indemnitee's
         participation  in  the  transactions   contemplated  by  the  Operative
         Agreements)  or the  breach by any  Indemnitee  of any  representation,
         warranty or  covenant  contained  in the  Operative  Agreements  or any
         document  delivered in connection  therewith (unless  attributable to a
         breach of representation, warranty or covenant of the Lessee);

                  (vi)  Taxes   imposed  on  the  Owner  Trustee  or  the  Owner
         Participant or any successor,  assign or Affiliate thereof which became
         payable  by  reason  of  any  voluntary  or  involuntary   transfer  or
         disposition  by  such  Indemnitee  subsequent  to  the  Delivery  Date,
         including  revocation  of the Trust,  of any interest in some or all of
         the Aircraft, Airframe, Engines or Parts thereof or its interest in the
         Lessor's  Estate  (not  including  any  transfers  of any  Certificates
         pursuant to Section  15.01 (a) hereof) or a  disposition  in connection
         with a bankruptcy or similar proceedings involving either the Lessor or
         the Owner  Participant  or a transfer or disposition of shares or other
         interests in the Owner Trustee or the Owner  Participant  or a transfer
         or disposition of shares or other interests in the Owner Trustee or the
         Owner  Participant  other  than (A)  transfers  resulting  from a loss,
         substitution or modification of the Aircraft,  Engines or any Part, (B)
         any transfer of the  Aircraft,  Engines or any Part (in each case other
         than at Fair Market Value) to the Lessee, (C) transfers pursuant to the
         Lessor's  exercise  of remedies in  accordance  with  Section 15 of the
         Lease or (D) a transfer pursuant to the Lessee's exercise of its rights
         under  Section  3(g) of the Lease;  the parties  agree to  cooperate to
         minimize any such Taxes covered by this provision;

                  (vii) Taxes subject to  indemnification by the Lessee pursuant
to the Tax Indemnity Agreement;

                  (viii)  Taxes   imposed  on  a  successor,   assign  or  other
         transferee  of any  interest  of  any  Indemnitee  (including,  without
         limitation,  a transferee  which is a new lending office of an original
         Indemnitee)  to the extent that such Taxes would not have been  imposed
         on the  original  Indemnitee  or exceed  the amount of Taxes that would
         have been imposed and would have been indemnifiable pursuant to Section
         8.01(a)  hereof had there not been a  succession,  assignment  or other
         transfer  by such  original  Indemnitee  of any such  interest  of such
         Indemnitee  in the  Aircraft or any Part,  any interest in or under any
         Operative  Agreement,  or any proceeds thereunder,  provided,  however,
         that the  exclusion  provided by this clause  (viii) shall not apply in
         the case of a succession,  transfer or disposition  (A) pursuant to the
         exercise of  remedies  under  Section 15 of the Lease,  (B) which is an
         actual or deemed  transfer  pursuant  to  Section  7.11  hereof or as a
         consequence of a Refinancing  under Section 15.01 hereof, or any actual
         or deemed transfer of a Certificate that as part of a Refinancing under
         Section  15.01 hereof is not retired,  but only to the extent the Taxes
         attributable  to such  transfer  exceed  the amount of Taxes that would
         have been  imposed  on such  transferor  if the debt had  instead  been
         retired,  (C) to the extent  necessary to make payments with respect to
         such Taxes on an After-Tax  Basis,  or (D) to the extent such Taxes are
         directly   attributable   to  the   failure   of  the  Lessee  to  take
         administrative  actions  as have  been  reasonably  requested  of it in
         writing in a timely  manner and which will result in no after-tax  cost
         or expense to the Lessee;

                  (ix)  Taxes  imposed by any  jurisdiction  that would not have
         been imposed on the Owner Trustee or the Owner  Participant but for the
         activities or the status of the Owner Trustee or the Owner  Participant
         in such jurisdiction unrelated to the transactions  contemplated by the
         Operative Agreements;

                  (x)      Any Taxes which have been included in the Purchase Price;

                  (xi) Any Taxes  which  would not have been  imposed  but for a
         Lessor's Lien or an Indenture Trustee's Lien;

                  (xii) Any Taxes imposed on the Owner Participant arising under
         or in connection with any prohibited transaction, within the meaning of
         Section  406 of ERISA or Section  4975(c)(1)  of the Code  ("Prohibited
         Transaction"); and

                  (xiii)  Taxes  that  would not have been  imposed  but for the
         existence or status of any trust used to hold title to the Aircraft.

         (c)  Withholding.  The  Pass-Through  Trustee shall  withhold any Taxes
required to be withheld on payments to any holder of a Pass-Through  Certificate
who is a  Non-U.S.  Person  except  to  the  extent  that  such  a  holder  of a
Pass-Through  Certificate  has furnished  evidence to the  Pass-Through  Trustee
sufficient  under  applicable  law to  entitle  such  holder  of a  Pass-Through
Certificate  to any exemption  from or reduction in the rate of  withholding  on
interest  claimed by such holder of a  Pass-Through  Certificate.  The Indenture
Trustee  shall  withhold  any Taxes  required to be withheld on any payment to a
Holder  pursuant to Section 5.09 of the Indenture.  If the Indenture  Trustee or
the  Pass-Through  Trustee  fails to withhold a Tax required to be withheld with
respect  to  any  Holder  of a  Certificate  or  any  holder  of a  Pass-Through
Certificate or any claim is otherwise asserted by a taxing authority against the
Owner  Trustee or Owner  Participant  for any  withholding  tax, the Lessee will
indemnify the Owner  Trustee and the Owner  Participant  (without  regard to the
exclusions set forth in Section  8.01(b)  hereof) on an After-Tax  Basis against
any such Taxes  required to be withheld  and any  interest  and  penalties  with
respect  thereto,  along with any other costs (including  reasonable  attorney's
fees) incurred in connection with any such claim.  The Indenture  Trustee or the
Pass-Through  Trustee,  as the  case may be,  in its  individual  capacity  (and
without  recourse to the Trust  Indenture  Estate),  shall  indemnify the Lessee
(without  regard to the  exclusions set forth in Section  8.01(b)  hereof) on an
After-Tax  Basis for any  payment  the Lessee  shall have made  pursuant  to the
preceding sentence.

         Section  8.02.  After-Tax  Basis.  The amount which the Lessee shall be
required to pay with respect to any Tax  indemnified  against under Section 8.01
shall be an amount sufficient to restore the Indemnitee,  on an After-Tax Basis,
to the  same  position  such  party  would  have  been in had  such Tax not been
incurred,  provided that the calculation of any additional  amounts owing to any
Indemnitee  as a result of the Lessee's  obligation to indemnify on an After-Tax
Basis  shall be made  without  regard to the  exclusions  set  forth in  Section
8.01(b). If any Indemnitee realizes a Tax benefit (whether by credit,  deduction
or  otherwise),  or would have realized such a benefit if properly  claimed,  by
reason of the payment of any Tax paid or indemnified against by the Lessee, such
Indemnitee shall promptly pay to the Lessee,  to the extent such Tax benefit was
not previously taken into account in computing such payment,  but not before the
Lessee  shall  have made all  payments  then due to such  Indemnitee  under this
Agreement,  the Tax Indemnity  Agreement and any other Operative  Agreement,  an
amount equal to the lesser of (x) the sum of such tax benefit plus any other tax
benefit  realized by such  Indemnitee  that would not have been realized but for
any payment made by such  Indemnitee  pursuant to this  sentence and not already
paid to the Lessee,  and (y) the amount of the payment  made under  Section 8.01
hereof and this Section 8.02 by the Lessee to such Indemnitee plus the amount of
any other payments by the Lessee to such Indemnitee  theretofore  required to be
made under this Section 8.02 and Sections  8.01 and 8.05 hereof (and the excess,
if any, of the Tax benefit over the applicable amount described in clause (x) or
clause (y) above  shall be carried  forward  and applied to reduce pro tanto any
subsequent  obligations  of the  Lessee  to make  payments  to  such  Indemnitee
pursuant to Section 8.01 hereof);  provided,  however,  that notwithstanding the
foregoing  portions of this sentence,  such Indemnitee shall not be obligated to
make any payment to the Lessee  pursuant to this sentence as long as an Event of
Default shall have occurred and be continuing  under the Lease. The Lessee shall
reimburse  on an After-Tax  Basis such  Indemnitee  (subject to Section  8.01(b)
hereof) for any payment of a tax benefit pursuant to the preceding  sentence (or
a tax benefit otherwise taken into account in calculating the Lessee's indemnity
obligation  hereunder)  to the  extent  that such tax  benefit  is  subsequently
disallowed or reduced.

         In determining the order in which any Indemnitee  utilizes  withholding
or other  foreign  taxes as a credit  against such  Indemnitee's  United  States
income taxes,  such Indemnitee shall be deemed to utilize (i) first, all foreign
taxes other than those described in clause (ii) below; provided, that such other
foreign  taxes  which  are  carried  back  to  the  taxable  year  for  which  a
determination  is being  made  shall be  deemed  utilized  after  foreign  taxes
described in clause (ii) below,  and (ii) then, on a pro rata basis, all foreign
taxes  with   respect  to  which  such   Indemnitee   is   entitled   to  obtain
indemnification pursuant to an indemnification provision contained in any lease,
loan  agreement,  or other  financing  document  (including  this  Participation
Agreement) that is similar to the indemnification provision in this Article 8.

         Notwithstanding  the  preceding  paragraph,  if  foreign  taxes  of  an
Indemnitee  have been  indemnified  hereunder and all such  indemnified  foreign
taxes have not been used to produce a credit  against such  Indemnitee's  United
States income taxes  resulting in the  realization  of a tax benefit paid to the
Lessee in  accordance  with the first  paragraph  of this  Section  8.02,  a tax
benefit will be deemed to be attributable to such  indemnified  foreign taxes to
the extent that an item of income derived from the transactions  contemplated in
the Operative  Agreements is allocable to sources  outside the United States and
such allocation  results in an increase in the amount of foreign tax credit such
Indemnitee is entitled to use in any taxable year over the amount of foreign tax
credit such  Indemnitee  would have been entitled to use if such foreign  source
allocation had not occurred.

         Section  8.03.  Time of Payment.  Any amount  payable to an  Indemnitee
pursuant to this  Article 8 shall be paid  promptly,  but in any event within 30
days after receipt of a written demand therefor from such Indemnitee accompanied
by a  written  statement  describing  in  reasonable  detail  the basis for such
indemnity  and the  computation  of the amount so payable,  provided that in the
case of amounts which are being  contested by the Lessee in good faith or by the
Indemnitee in either case pursuant to Section 8.04 hereof,  such amount shall be
payable within 30 days after the time such contest is finally resolved.

         Section  8.04.  Contests.  If a  written  claim  is  made  against  any
Indemnitee for Taxes with respect to which the Lessee is liable for a payment or
indemnity hereunder,  such Indemnitee shall promptly (but in any event within 30
days of receipt  thereof)  give the  Lessee  notice in writing of such claim and
shall  furnish the Lessee with copies of any written  requests  for  information
sent to such  Indemnitee  (and not the Lessee) from any taxing  authority to the
extent  relating to such Taxes with  respect to which the Lessee may be required
to  indemnify  hereunder  and with  respect  to which it would be  necessary  or
beneficial to have information provided by the Lessee;  provided,  however, that
the failure of an  Indemnitee to give such notice or furnish such copy shall not
terminate any of the rights of such Indemnitee  under this Article 8, except (a)
to the  extent  that the  Lessee's  contest  rights  have  been  materially  and
adversely  impaired by the failure to provide  such notice or copy or (b) to the
extent that such  failure  results in the  imposition  of, or an increase in the
amount of, any penalties,  interest or additions to Tax related to the Tax which
is the  subject of such claim or  proceeding.  The Lessee  may,  at its  option,
contest  in its own name or, if  required  by law,  require  the  Indemnitee  to
contest in good faith, with due diligence and at the Lessee's expense, if timely
requested in writing by the Lessee,  the  validity,  applicability  or amount of
such Taxes by:

                           (i)   resisting   payment   thereof   if  lawful  and
                  practicable  or not paying the same  except  under  protest if
                  protest  is  necessary  and  proper  in  each  case so long as
                  non-payment  will not result in a  material  risk of the sale,
                  forfeiture  or loss of, or the creation of a Lien other than a
                  Permitted Lien on the Aircraft,  Airframe or any Engine or any
                  risk of criminal liability; or

                           (ii) if the payment be made, using reasonable efforts
                  to obtain a refund thereof in appropriate  administrative  and
                  judicial proceedings.

Notwithstanding the foregoing,  the Lessee shall not be permitted or entitled to
contest any such Tax in its own name unless the Tax is  reflected in a report or
a return of the Lessee or raised in an audit or other  proceeding  of the Lessee
and the Lessee is allowed to directly  contest such Tax under  applicable law of
the  taxing  jurisdiction  provided,  that if the Lessee is so  permitted  under
applicable  law to  contest a Tax  asserted  against  the Lessee and the same or
similar Tax is also asserted against the Indemnitee, each of the Lessee and such
Indemnitee  shall  conduct  its  contest in its own name and the Lessee and such
Indemnitee will cooperate in a reasonable  manner with respect to the respective
contests of such Tax.

         If the  Indemnitee,  after  reasonable  discussion  with the Lessee and
consideration  in good  faith of any  suggestion  made by the  Lessee  as to the
method of pursuing such contest,  elects to conduct the contest, such Indemnitee
shall  control the contest  and shall  determine  the manner in which to contest
such Taxes and shall periodically or upon the Lessee's request advise the Lessee
of the progress of such contest;  provided,  however, that the Lessee shall have
the right to be  consulted  in good faith with  respect to any contest of claims
subject  to  indemnification  hereunder,  including  governmental  and  judicial
conferences  and the right to be consulted in good faith  regarding the relevant
portions of all related  submissions  to any  governmental  or other  authority,
provided, however, that the Lessee shall be permitted to participate in any such
contest  only (x) with respect to issues that can be separated on audit from any
Taxes  for  which  the  Lessee  is not  required  to  indemnify  the  Indemnitee
hereunder, and (y) if the Indemnitee shall have determined that in its judgment,
exercised in its sole discretion,  neither such participation nor the separation
of issues will adversely  affect the Indemnitee.  Notwithstanding  the foregoing
provisions  of  this  paragraph,  if the  Lessee  acknowledges  in  writing  its
liability to the  Indemnitee  hereunder with respect to the Taxes subject to the
contest if the contest is resolved  adversely,  the Lessee  shall  control  such
contest.  If the Lessee  satisfies the conditions  imposed on it in this Section
8.04 and an Indemnitee  nevertheless  fails to contest and refuses to permit the
Lessee to contest under and as and to the extent  required by this Section 8.04,
then the Lessee shall not be obligated to  indemnify  such  Indemnitee  for such
claim or for any  other  claim  for  which a  successful  contest  is  adversely
affected  because  of such  failure  to  contest  or to  permit a  contest.  The
Indemnitee  will not  settle a contest  that  results  in a final  determination
without  consent  of the  Lessee,  unless  the  Indemnitee  waives  its right to
indemnification  with respect to such contest and any related contest.  Any such
settlement,  concession,  or compromise without the prior written consent of the
Lessee shall constitute a waiver of such Indemnitee's  rights to indemnification
hereunder  with respect to such claim and any other claim for which a successful
contest  is  adversely  affected  because  of such  settlement,  concession,  or
compromise.  Notwithstanding  the preceding sentences of this Section 8.04, such
Indemnitee  shall not be  required  to take or  continue  any action  unless the
Lessee shall have (i) agreed in writing to pay and shall pay the Indemnitee on a
current  basis  and on an  After-Tax  Basis  all  reasonable  fees and  expenses
(including   reasonable  attorneys'  fees  and  accountants'  fees)  which  such
Indemnitee  may incur as a result of  contesting  such Taxes,  and (ii) made all
payments and indemnities  (other than contested  payments and indemnities)  then
due to the  Indemnitee  hereunder  or with  respect  to any of the  transactions
contemplated  by or under  the  Operative  Agreements.  In no event  shall  such
Indemnitee  be required or the Lessee be permitted  to contest  pursuant to this
Section  8.04 the  imposition  of any Tax for which the Lessee is  obligated  to
indemnify  any  Indemnitee  hereunder  unless  (i) such  Indemnitee  shall  have
received,  at the Lessee's  expense,  an opinion of tax counsel  selected by the
Lessee,  such counsel to be  reasonably  satisfactory  to the  Indemnitee  ("Tax
Counsel"),  to the effect that there  exists a reasonable  basis for  contesting
such claim, (ii) such contest will not result in any material risk of loss, sale
or forfeiture of, or the creation of a Lien (other than Permitted Liens) on, the
Aircraft  or any part  thereof  or  interest  thereon  or in a risk of  criminal
liability,  or adversely affect the Trust Indenture Estate, (iii) if a Specified
Default  exists,  the Lessee shall have  provided  security for its  obligations
hereunder reasonably satisfactory to the Indemnitee,  (iv) if such contest shall
be conducted in a manner requiring  payment of the claim in advance,  the Lessee
shall have advanced  sufficient  funds,  on an interest free basis,  to make the
payment required,  and agreed to indemnify the Indemnitee against any additional
net adverse tax  consequences  on an After-Tax  Basis to such Indemnitee of such
advance,  and  (v) the  issue  shall  not be the  same  as an  issue  previously
contested  hereunder and decided  adversely,  unless the  Indemnitee  shall have
received at the Lessee's sole expense, a written opinion,  in form and substance
reasonably  satisfactory to such  Indemnitee,  of Tax Counsel to the effect that
the applicable circumstances or law has changed and that in light thereof, there
is substantial authority for contesting such claim; provided,  that in the event
that such  Indemnitee  is not required  under this  paragraph to contest any Tax
liability  for which the Lessee is obligated to indemnify  any  Indemnitee,  the
Lessee may contest such Tax liability in the name of the Lessee, if permitted by
law.  The Lessee may appeal or require  the  Indemnitee  to appeal any  judicial
decision  provided the foregoing  requirements  of this Section 8.04 are met and
the Indemnitee shall have received,  at the Lessee's expense,  an opinion of Tax
Counsel, to the effect that there is substantial authority for such appeal.

         Nothing  contained in this Section 8.04 shall require any Indemnitee to
contest or continue to contest,  or permit Lessee to contest, a claim which such
Indemnitee would otherwise be required to contest pursuant to this Section 8.04,
if such  Indemnitee  shall  waive  payment  by Lessee of any  amount  that might
otherwise  be payable by Lessee  under this  Article 8 in  connection  with such
claim.

         Section  8.05.  Refunds.  Upon receipt by an Indemnitee of a refund (or
would have received such a refund but for offset by matters not indemnifiable by
the Lessee  under  Section  8.01(a))  of all or any part of any Taxes  which the
Lessee  shall have paid for such  Indemnitee  or for which the Lessee shall have
reimbursed  or  indemnified  such  Indemnitee,  and  provided  that no Specified
Default exists (but if a Specified Default does exist, payment shall not be made
to the Lessee until no Specified  Default exists),  such Indemnitee shall pay to
the Lessee an amount  equal to the amount of such  refund or offset less (x) any
expenses not previously reimbursed, (y) all payments then due to such Indemnitee
under  this  Article 8, and (z) Taxes  imposed  with  respect to the  accrual or
receipt thereof,  including interest received attributable thereto, plus any tax
benefit  realized  by  such  Indemnitee  as a  result  of any  payment  by  such
Indemnitee made pursuant to this sentence;  provided,  however, that such amount
shall not be  payable  (a) before  such time as the  Lessee  shall have made all
payments  or  indemnities  then due and  payable to such  Indemnitee  under this
Article 8 and (b) to the extent that the amount of such payment would exceed (i)
the amount of all prior  payments by the Lessee to such  Indemnitee  pursuant to
this Article 8 less (ii) the amount of all prior payments by such  Indemnitee to
the Lessee pursuant to this Article 8.

         Any subsequent loss of such refund or tax benefit shall be treated as a
Tax subject to  indemnification  under the  provisions of this Article 8 (in the
case of any such tax benefit, subject to Section 8.01 (b) hereof).

         Section  8.06.  Lessee's  Reports.  In case any  report  or  return  is
required to be made with respect to any Taxes against which the Lessee is or may
be  obligated  to  indemnify  the  Indemnitees  under this Article 8, the Lessee
shall,  to the  extent it has  knowledge  thereof,  make such  report or return,
except for any such report or return that the Indemnitee has notified the Lessee
that it  intends  to file,  in such  manner  as will show the  ownership  of the
Aircraft in the Owner Trustee and shall send a copy of the  applicable  portions
of such report or return to the  Indemnitee and the Owner Trustee or will notify
the Indemnitee of such requirement and make such report or return in such manner
as shall be satisfactory  to such  Indemnitee and the Owner Trustee.  The Lessee
will provide such information  within the possession or control of the Lessee as
the Indemnitee  may reasonably  require from the Lessee to enable the Indemnitee
to  fulfill  its  tax  filing  requirements  with  respect  to the  transactions
contemplated by the Operative  Agreements (without duplication of any comparable
requirements of the Tax Indemnity  Agreement) and any audit information  request
arising  from any such filing.  The  Indemnitee  will  provide such  information
within its possession or control as the Lessee may reasonably  require from such
Indemnitee  to enable  the Lessee to fulfill  its tax filing  requirements  with
respect to the  transactions  contemplated  by the Operative  Agreements and any
audit  information  request arising from such filing;  provided that in no event
shall any  Indemnitee be required to provide copies of any of its tax returns or
other confidential information. The Lessee shall hold the Indemnitee harmless on
an  After-Tax  Basis from and  against  any  liabilities,  including  penalties,
additions  to  tax,  fines  and  interest,  imposed  upon  or  incurred  by such
Indemnitee  to  the  extent  directly   attributable  to  any  insufficiency  or
inaccuracy  in any  return,  statement,  or  report  prepared  by the  Lessee or
information  supplied by the Lessee,  or directly  attributable  to the Lessee's
failure  to  supply  information  within  its  possession  or  control  to  such
Indemnitee  as  required  by this  Section  8.06.  If an  Indemnitee  makes  any
representation  regarding  the value of the  Aircraft or any part thereof to any
taxing  authority  without the Lessee's  prior  written  consent as to the value
represented (which consent shall not be unreasonably withheld),  that Indemnitee
shall be  responsible  for any Tax to the  extent  that it would  not have  been
payable if the value used were a value reasonably proposed by the Lessee.

         Section 8.07. Survival of Obligations. The representations, warranties,
indemnities  and agreements of the Lessee provided for in this Article 8 and the
Lessee's  obligations  under any and all of them, in each case,  with respect to
events or periods  prior to the  expiration  or  termination  of the Lease shall
survive the expiration or other termination of the Operative Agreements.

         Section  8.08.  Payment of Taxes.  With  respect  to any Tax  otherwise
indemnifiable hereunder by the Lessee and applicable to the Aircraft,  Airframe,
any Engine or Parts, to the extent permitted by the applicable  federal,  state,
local or foreign  law,  the Lessee  shall pay such tax  directly to the relevant
Taxing  authority and file any returns or reports  required with respect thereto
to the extent legally entitled to do so in its own name; provided, however, that
the Lessee shall not make any statements or take any action which would indicate
that the Lessee or any Person other than the Owner Trustee or Owner  Participant
is the owner of the  Aircraft,  the  Airframe,  any  Engine or any Part or which
would otherwise be inconsistent with the terms of the Lease or the Tax Indemnity
Agreement  and the  position  thereunder  of the  Owner  Trustee  and the  Owner
Participant.  Copies of such  returns or  reports,  together  with  evidence  of
payment  of any tax due,  shall be sent by the  Lessee to the Owner  Participant
within 30 days after the date of each payment by the Lessee of any Tax.

         Section 8.09.  Reimbursements by Indemnitees  Generally.  To the extent
the Lessee is required to pay or withhold  any Tax imposed on or with respect to
an  Indemnitee  in respect of the  transactions  contemplated  by the  Operative
Agreements,  which Tax is not otherwise the  responsibility  of the Lessee under
the Operative Agreements, or any other written agreements between the Lessee and
such Indemnitee,  then such Indemnitee shall pay to the Lessee within 30 days of
the Lessee's  demand therefor an amount which equals the amount actually paid by
the Lessee with respect to such Taxes.

         Section  8.10.  Special  Indemnity.  Notwithstanding  anything  in this
Article 8 to the contrary,  the Lessee shall hold the Owner Participant harmless
on an After-Tax  Basis from any Taxes or losses  arising  from or in  connection
with the transactions  contemplated by Section 17.02 hereof (provided, that this
Section 8.10 shall not require any indemnification for any Loss of Tax Benefits,
as defined in the Tax Indemnity Agreement).

         . At the Lessee's request, the accuracy of any calculation of amount(s)
payable  pursuant  to this  Article 8 shall be verified  by  independent  public
accountants selected by the applicable Indemnitee and reasonably satisfactory to
the Lessee, and such verification  shall bind the applicable  Indemnitee and the
Lessee.  In order,  and to the  extent  necessary,  to enable  such  independent
accountants  to verify  such  amounts,  such  Indemnitee  shall  provide to such
independent  accountants (for their  confidential use and not to be disclosed to
the Lessee or any other person) all  information  reasonably  necessary for such
verification.  Verification  shall be at the expense of the Lessee,  unless such
verification  results in an adjustment in the Lessee's  favor of $10,000 or more
of the amount of the payment as computed by such  Indemnitee,  in which case the
verification shall be at the expense of the Indemnitee.

                                    ARTICLE 9

                                GENERAL INDEMNITY

         Section  9.01.  Generally.  (a) The  Lessee  agrees to  indemnify  each
Indemnitee  against and agrees to protect,  defend,  save and keep harmless each
Indemnitee  against and in respect of, and will pay on an After-Tax Basis,  from
any  and all  liabilities,  obligations,  losses,  damages,  penalties,  claims,
actions,  suits,  costs,   disbursements  and  expenses,  demands  or  judgments
(including  legal  fees and  expenses  and all costs and  expenses  relating  to
amendments,  supplements,  adjustments, consents, refinancings and waivers under
the Operative  Agreements  except as otherwise  provided in Section  10.01(c)(i)
hereof)  of every  kind and  nature,  including  without  limitation  Make-Whole
Premium (other than any Make-Whole  Premium  payable as a result of an Indenture
Event of Default  that is not a Lease Event of  Default),  and  whether  arising
before,  on, or after the Certificate  Closing Date,  (whether or not any of the
transactions contemplated by this Agreement are consummated)  (individually,  an
"Expense,"  collectively,  "Expenses"),  which may be imposed  on,  incurred  or
suffered by or asserted against any Indemnitee, in any way relating to, based on
or arising out of or in connection  with,  in each case directly or  indirectly,
any one or more of the following:

                  (i) any  Operative  Agreement,  any  document  entered into in
         connection   therewith,   any  sublease  or  transfer,   or  any  other
         transaction contemplated hereby or thereby;

                  (ii) the operation,  possession,  use,  non-use,  maintenance,
         storage, overhaul, delivery,  non-delivery,  control, repair or testing
         of  the  Aircraft,  Airframe,  or any  Engine  or any  engine  used  in
         connection  with the Airframe,  or any Part thereof by the Lessee,  any
         sublessee  or  any  other  Person  whatsoever,   whether  or  not  such
         operation,  possession, use, non-use,  maintenance,  storage, overhaul,
         delivery,  non-delivery,  control,  repair or testing is in  compliance
         with the terms of the Lease, including, without limitation,  claims for
         death,  personal injury or property damage or other loss or harm to any
         Person  whatsoever,  including,  without  limitation,  any  passengers,
         shippers  or other  Persons  wherever  located,  and  claims or penalty
         relating  to  any  laws,  rules  or  regulations,   including,  without
         limitation,  environmental  control, noise and pollution laws, rules or
         regulation;

                  (iii)  the  manufacture,   design,  sale,  return,   purchase,
         acceptance,  rejection,  delivery,  non-delivery,   condition,  repair,
         modification,  servicing,  rebuilding,   airworthiness,   registration,
         reregistration,  deregistration,  ownership, financing, import, export,
         performance,     non-performance,     lease,    sublease,     transfer,
         merchantability,   fitness  for  use,   alteration,   substitution   or
         replacement of any Airframe,  Engine,  or Part or other transfer of use
         or possession,  or other disposition of the Aircraft, the Airframe, any
         Engine or any Part  including,  without  limitation,  latent  and other
         defects,  whether or not discoverable,  strict tort liability,  and any
         claims for patent, trademark or copyright infringement;

                  (iv) any breach of or failure  to perform or  observe,  or any
         other non-compliance  with, any condition,  covenant or agreement to be
         performed,  or  other  obligations  of  the  Lessee  under  any  of the
         Operative Agreements or any Pass-Through  Agreement,  or the falsity or
         inaccuracy  of any  representation  or warranty of the Lessee in any of
         the Operative  Agreements  or any  Pass-Through  Agreement  (other than
         representations and warranties in the Tax Indemnity Agreement);

                  (v)      the Collateral Account and the Liquid Collateral;

                  (vi) the enforcement of the terms of the Operative  Agreements
         and the administration of the Trust Indenture Estate; and

                  (vii) the offer,  issuance,  sale,  resale or  delivery of any
         Certificate  or  any  Pass-Through  Certificate,  or any  refunding  or
         refinancing  thereof,  or interest in the Lessor's  Estate or the Trust
         Agreement or any similar  interest or in any way relating to or arising
         out of the Trust  Agreement and the Lessor's  Estate,  the Indenture or
         the Trust Indenture Estate (including,  without  limitation,  any claim
         arising out of the Securities  Act of 1933, as amended,  the Securities
         Exchange  Act of 1934,  as  amended,  or any other  federal or state or
         foreign  statute,  law or  regulation,  or at common  law or  otherwise
         relating to securities), or the action or inaction of the Owner Trustee
         or Indenture  Trustee as trustees,  in the manner  contemplated by this
         Agreement,  the  Indenture,  the  Indenture  Supplement  or  the  Trust
         Agreement  and in the case of the Owner  Participant,  its  obligations
         arising under Section 6.01 of the Trust Agreement.

The foregoing  indemnity by the Lessee is intended to include and cover,  but is
not limited to, any Expense to which the  Indemnitees may be subject as a result
of their  respective  ownership  or leasing of any interest in or holding of any
Lien on the Aircraft,  Airframe,  any Engine or Part during the Term, whether or
not in the Lessee's  possession or control,  insofar as such Expense  relates to
any activity or event whatsoever  involving such item while it is under lease to
the Lessee (or after termination of the Lease in connection with the exercise of
remedies  thereunder  to the extent  that such  Expense is  attributable  to the
transactions  contemplated  hereby and by the other Operative  Agreements),  and
such Expense does not fall within any of the  exceptions  listed in Section 9.01
(b) hereof.

         (b)      Exceptions.  The  indemnity  provided  for in Section 9.01 (a) shall not extend to any Expense of
                  ----------
any Indemnitee to the extent it:

                  (i) results from the willful misconduct or gross negligence of
         any  Indemnitee  (other  than gross  negligence  or willful  misconduct
         imputed to such person by reason of its interest in the Aircraft or any
         transaction documents);

                  (ii) is  attributable  to  acts  or  events  (other  than  the
         performance by Lessee of its  obligations  pursuant to the terms of the
         transaction documents) which occur after the Aircraft is no longer part
         of the  Lessor's  Estate  or,  if the  Aircraft  remains  a part of the
         Lessor's Estate,  after the expiration of the Term (unless the Aircraft
         is being  returned at such time, in which case after return of physical
         possession;  provided that if the Lease has been terminated pursuant to
         Section 15 thereof,  the indemnity  provided in Section  9.01(a) hereof
         shall survive for so long as Lessor or the  Indenture  Trustee shall be
         exercising  remedies under such Section 15), or to acts or events which
         occur  after  return of  possession  of the  Aircraft  by the Lessee in
         accordance  with the  provisions of the Lease (subject to the foregoing
         proviso if the Lessor has  terminated  the Lease pursuant to Section 15
         of the Lease);

                  (iii) is a Tax or loss of a Tax  benefit,  whether  or not the
         Lessee is required to indemnify  therefor  pursuant to Article 8 hereof
         or pursuant to the Tax Indemnity Agreement;

                  (iv) is a cost or expense required to be paid by an Indemnitee
         or its permitted  transferees  (and not by the Lessee) pursuant to this
         Agreement or any other Operative  Agreement and for which the Lessee is
         not  otherwise  obligated to  reimburse  such  Indemnitee,  directly or
         indirectly  pursuant  to the  terms  of this  Agreement  or such  other
         Operative Agreement;

                  (v) results from the incorrectness or breach by any Indemnitee
         of its  representations  or  warranties,  under  any  of the  Operative
         Agreements;

                  (vi) results from the failure by any Indemnitee to perform its
         obligations under any of the Operative Agreements;

                  (vii) is, in the case of the Owner Participant, Lessor's Liens
         to the extent attributable to the Owner Participant; in the case of the
         Owner Trustee,  Lessor's Liens to the extent  attributable to the Owner
         Trustee;  in the case of SSB, Lessor's Liens to the extent attributable
         to SSB; and in the case of the Indenture Trustee,  Indenture  Trustee's
         Liens;

                  (viii) is, in the case of the Owner  Participant  or the Owner
         Trustee, attributable to the offer or sale by such Indemnitee after the
         Certificate Closing Date of any interest in the Aircraft,  the Lessor's
         Estate or the Trust  Agreement or any similar  interest  (including  an
         offer or sale resulting from  bankruptcy or other  proceedings  for the
         relief of debtors in which such  Indemnitee  is the debtor),  unless in
         each case such offer or sale shall occur (x)  pursuant to the  exercise
         of remedies under Section 15 of the Lease or (y) in connection with the
         Lessee's exercise of its early termination option under Section 3(g) of
         the Lease or its purchase  options  under Section 16 of the Lease or in
         connection with Section 11 of the Lease;

                  (ix) is an Expense  arising  under or in  connection  with any
         prohibited  transaction,  within the meaning of Section 406 of ERISA or
         Section 4975(c)(1) of the Code ("Prohibited Transaction");

                  (x)  results  from  any  amendment  to any  of  the  Operative
         Agreements  which is not  requested  by the Lessee and is not  required
         pursuant to the terms of any of the Operative Agreements;

                  (xi) results from the exercise by any  Indemnitee of any right
         to inspect  the  Aircraft  except with  respect to any such  inspection
         conducted while an Event of Default is continuing; and

                  (xii)  constitutes  the  loss  of  future  profits  or  losses
         attributable  to the Owner  Participant's  and/or  the Owner  Trustee's
         overhead.

         Section  9.02.  After-Tax  Basis.  The amount which the Lessee shall be
required to pay with respect to any Expense  indemnified  against  under Section
9.01 shall be an amount  sufficient to restore the  Indemnitee,  on an After-Tax
Basis,  to the same  position such party would have been in had such Expense not
been  incurred.  If any  Indemnitee  realizes a Tax benefit  (whether by credit,
deduction  or  otherwise),  or would have  realized  such a benefit if  properly
claimed, by reason of the payment of such Expense paid or indemnified against by
the Lessee which was not considered in the computation thereof,  such Indemnitee
shall promptly pay to the Lessee,  but not before the Lessee shall have made all
payments theretofore due such Indemnitee under this Agreement, the Tax Indemnity
Agreement and any other  Operative  Agreement,  an amount equal to the lesser of
(x) the sum of such Tax benefit plus any other permanent Tax benefit realized by
such Indemnitee as the result of any payment made by such Indemnitee pursuant to
this sentence and (y) the amount of the payment  pursuant to Section 9.01 by the
Lessee to such Indemnitee plus the amount of any other payments by the Lessee to
such Indemnitee  theretofore  made pursuant to this Section 9.02 less the amount
of any payments by such  Indemnitee to the Lessee  theretofore  made pursuant to
this  Section  9.02  (and  the  excess,  if any,  of the Tax  benefit  over  the
applicable  amount  described in clause (x) or clause (y) above shall be carried
forward and applied to reduce pro tanto any subsequent obligations of the Lessee
to make payments to such  Indemnitee  pursuant to this Section  9.02),  it being
intended that no Indemnitee  should  realize a net Tax benefit  pursuant to this
Section 9.02 unless the Lessee shall first have been made whole for any payments
by it to such Indemnitee pursuant to this Section 9.02; provided,  however, that
notwithstanding  the foregoing portions of this sentence,  such Indemnitee shall
not be obligated to make any payment to the Lessee  pursuant to this sentence so
long as a Specified Default exists. Any Taxes that are imposed on any Indemnitee
as a result of the  disallowance or reduction of such Tax benefit referred to in
the  next  preceding  sentence  in a  taxable  year  subsequent  to the  year of
allowance and  utilization by such  Indemnitee  (including the expiration of any
tax credit  carryovers or carrybacks of such Indemnitee that would not otherwise
have expired) shall be indemnifiable  pursuant to the provisions of Section 8.01
hereof without regard to Section 8.01 (b) hereof.

         Section  9.03.  Subrogation.  Upon the payment in full of any indemnity
pursuant to this Article 9 by the Lessee (but not earlier),  the Lessee shall be
subrogated to any right of the Indemnitee in respect of the matter against which
such indemnity has been made.

         Section 9.04. Notice and Payment.  Each Indemnitee and the Lessee shall
give prompt written notice one to the other of any liability of which such party
has  received  notice  for which the  Lessee  is, or may be,  liable  under this
Article  9;  provided,  however,  that  failure  to give such  notice  shall not
terminate  any of the rights of the  Indemnitees  under this  Article 9,  except
(with  respect to such  Indemnitee)  to the extent that such  failure  adversely
affects any  applicable  defense or  counterclaim,  or otherwise  increases  the
amount the Lessee  would have been liable for in the absence of such  failure to
provide such notice. Unless otherwise provided in the Operative Agreements,  any
amount payable to an Indemnitee  pursuant to this Article 9 shall be paid within
30 days  after  receipt  of a  written  demand  therefor  from  such  Indemnitee
accompanied by a written statement describing in reasonable detail the basis for
such indemnity and the computation of the amount so payable.

         Section 9.05. Refunds. If any Indemnitee shall obtain a recovery of all
or any part of any amount which the Lessee shall have paid to such Indemnitee or
for which the Lessee shall have reimbursed such Indemnitee under this Article 9,
and provided that no Specified  Default exists (but if a Specified  Default does
exist,  payment  shall  not be made to the  Lessee  until no  Specified  Default
exists),  such  Indemnitee  shall  pay to the  Lessee  the  amount  of any  such
recovery,  including interest received with respect to the recovery,  net of any
Taxes paid or payable as a result of the receipt of the recovery  and  interest,
plus any net additional tax benefits realized by the Indemnitee as the result of
any payment made  pursuant to this sentence less  reasonable  costs  incurred by
such Indemnitee and not indemnified by the Lessee; provided,  however, that such
amount  shall not be payable (a) before such time as the Lessee  shall have made
all payments or indemnities  then due and payable to such Indemnitee  under this
Article 9, or (b) to the extent that the amount of such payment would exceed the
amount of all prior payments by the Lessee to such  Indemnitee  pursuant to this
Article  9, less the  amount of all prior  payments  by such  Indemnitee  to the
Lessee  pursuant to this Article 9. Any subsequent  loss of such recovery or tax
benefit shall be subject to  indemnification  under Article 8 or this Article 9,
as the case may be, subject to Section 8.01 (b) hereof.

         Section 9.06.  Defense of Claims. The Lessee or its insurers shall have
the right  (in each such case at the  Lessee's  sole  expense)  to  investigate,
defend (and  control the defense  of) any such claim  covered by  insurance  for
which  indemnification  is sought pursuant to this Article 9 (in the case of any
such  defense  by the  Lessee,  but  not the  Lessee's  insurers,  with  counsel
reasonably  satisfactory to the relevant  Indemnitee) and each Indemnitee  shall
cooperate with the Lessee or its insurers with respect thereto,  provided, that,
without  limiting the right of the  Lessee's  insurers to assume and control the
defense of, or to compromise,  any such claim,  the Lessee shall not be entitled
to assume and control the defense of or compromise any such claim (A) during the
continuance  of any Event of Default  arising  under Section 14(a) of the Lease,
(B) if such Indemnitee  reasonably objects to such control on the ground that an
actual or potential material conflict of interest exists making it advisable (on
the basis of  prevailing  standards  of  professional  responsibility)  for such
Indemnitee  to be  represented  by separate  counsel or on the grounds that such
proceeding  involves  the  potential  imposition  of criminal  liability on such
Indemnitee  or (C) such  proceeding  will involve any material risk of the sale,
forfeiture or loss of, or the creation of any Lien (other than Permitted  Liens)
on the  Aircraft or the Trust  Estate  (unless the Lessee  posts a bond or other
security  reasonably  acceptable  in form and substance to such  Indemnitee)  or
involve any material risk of civil  liability to such Indemnitee for which it is
not indemnified  hereunder and, in any such case, the relevant  Indemnitee will,
in good faith, undertake the defense of such claim at the expense of the Lessee.
Subject to the immediately foregoing sentence,  where the Lessee or the insurers
under a policy of insurance maintained by the Lessee undertake the defense of an
Indemnitee with respect to such a claim, no additional legal fees or expenses of
such  Indemnitee  in  connection  with  the  defense  of  such  claim  shall  be
indemnified  hereunder  unless the fees or expenses were incurred at the written
request of the Lessee or such  insurers or as the result of the  prohibition  of
the  dual  representation  of  Lessee  and the  relevant  Indemnitee  under  the
applicable  rules of legal ethics.  Subject to the  requirement of any policy of
insurance  applicable  to a claim,  an  Indemnitee  may  participate  at its own
expense at any  judicial  proceeding  controlled  by the Lessee or its  insurers
pursuant  to  the  preceding  provisions,   to  the  extent  that  such  party's
participation  does not, in the opinion of the independent  counsel appointed by
the Lessee or its  insurers to conduct  such  proceedings,  interfere  with such
control;   and  such  participation   shall  not  constitute  a  waiver  of  the
indemnification  provided in this Section 9.06.  No Indemnitee  shall enter into
any settlement or other  compromise  with respect to any claim described in this
Section 9.06 without the prior written  consent of the Lessee (except during the
continuance  of an Event of Default  arising  under Section 14(a) of the Lease),
which  consent  shall not be  unreasonably  withheld  or  delayed,  unless  such
Indemnitee  waives its right to be indemnified under this Article 9 with respect
to such claim.  The Lessee  shall not enter into any  settlement  or  compromise
which the Lessee has not agreed to discharge or with respect to which the Lessee
has not agreed to indemnify such Indemnitee to such Indemnitee's satisfaction or
which admits any criminal  violation,  gross negligence or willful misconduct on
the part of any Indemnitee without the prior written consent of such Indemnitee.

         Section 9.07. Survival of Obligations. The representations, warranties,
indemnities  and agreements of the Lessee provided for in this Article 9 and the
Lessee's  obligations  under any and all of them shall survive the expiration or
other  termination of this  Agreement,  the Tax Indemnity  Agreement,  the Trust
Agreement, the Indenture,  the Purchase Agreement Assignment,  the Lease and the
other Operative  Agreements but, as to such indemnities  after the expiration or
other  termination  of the Lease,  only with  respect  to  losses,  liabilities,
obligations,  damages,  penalties,  claims,  actions, suits, costs, Expenses and
disbursements  caused by events  occurring or existing prior to such termination
or expiration or incurred in the process of (i) the return or disposition of the
Aircraft under Section 5 or Section 15 of the Lease,  or (ii) the termination of
the Lease or the Indenture or, if later, the return of the Aircraft.

         Section 9.08.  Effect of Other  Indemnities.  The Lessee's  obligations
under the indemnities provided for in this Agreement shall be those of a primary
obligor  whether or not the Person  indemnified  shall also be indemnified  with
respect to the same matter  under the terms of this  Agreement,  the Lease,  the
Indenture,  the Trust  Agreement,  or any other document or instrument,  and the
Person seeking indemnification from the Lessee pursuant to any provision of this
Agreement  may proceed  directly  against the Lessee  without  first  seeking to
enforce any other right of indemnification.

         Section  9.09.  Interest.  The Lessee  will pay to each  Indemnitee  on
demand,  to the extent  permitted by applicable  law,  interest on any amount of
indemnity  not paid when due  pursuant to this Article 9 until the same shall be
paid, at the Past Due Rate.

         Section  9.10.  Special  Indemnity.  Notwithstanding  anything  in this
Article 9 to the contrary,  the Lessee shall hold the Owner Participant harmless
on an After-Tax  Basis from any losses  arising from or in  connection  with the
transactions contemplated by Section 17.02 hereof.



                                   ARTICLE 10

                                TRANSACTION COSTS

         Section  10.01.  Transaction  Costs and Other  Costs.  (a)  Transaction
Costs.  Except as otherwise  provided in any  amendment to this  Agreement,  the
Lessee (or the Owner  Participant  following  a transfer  of the  Initial  Owner
Participant's  Beneficial  Interest)  shall pay (or  reimburse the Lessee if the
Lessee  shall have  previously  made such  payment) all fees and expenses of the
following  persons  relating to the  offering of the  Pass-Through  Certificates
contemplated  by  the  Placement  Agreement  and  related  to  the  transactions
contemplated  hereby on the Certificate  Closing Date and the Delivery Date: (i)
the fees and  expenses  of  counsel  for any Owner  Participant  (including  any
special  Canadian  counsel);  (ii)  the  fees and  expenses  of the  transaction
documentation  counsel  for the Lessee and counsel  for the Owner  Trustee,  the
Indenture Trustee, the Manufacturer,  SDIQ, the Seller, the Subordination Agent,
the Pass-Through Trustee, each Liquidity Provider and the Placement Agent (other
than those fees,  expenses  and  disbursements  payable by the  Placement  Agent
pursuant to the  Placement  Agreement);  (iii) the fees and  expenses of Special
Aviation Counsel; (iv) any initial fees and expenses of the Pass-Through Trustee
and each Liquidity Provider and the fees and expenses of the Owner Trustee,  the
Subordination Agent and the Indenture Trustee; (v) any compensation, commissions
and  discounts  payable  to  the  Placement  Agent  pursuant  to  the  Placement
Agreement;  (vi)  the  fees,  if any,  incurred  in  printing  the  Pass-Through
Certificates;  (vii) the fees and expenses  incurred in connection with printing
any  offering  memorandum  for the  offering of the  Pass-Through  Certificates;
(viii) the fees and expenses of BDO Seidman  LLP;  (ix) the fees and expenses of
Moody's and S&P;  (x) the fees and  expenses  (including  computer  time-sharing
charges) of Babcock & Brown, Inc.; (xi) the reasonable out-of-pocket expenses of
the Owner  Participant,  including,  without  limitation,  any  amounts  paid in
connection with any appraisal report prepared for the Owner  Participant;  (xii)
reimbursement to the Owner  Participant,  any Owner Participant  Guarantor,  the
Owner Trustee,  the Indenture Trustee,  the Subordination  Agent, each Liquidity
Provider  and the  Pass-Through  Trustee  for any and  all  fees,  expenses  and
disbursements  of the  character  referred  to above or  otherwise  incurred  in
connection with the negotiation, preparation, execution and delivery, filing and
recording of the Operative  Agreements and the documents  contemplated  thereby,
including,  without  limitation,  travel expenses and disbursements  which shall
have been paid by such party;  (xiii) printing and duplicating  expenses and all
fees, Taxes and other charges payable in connection with the recording or filing
on or before the Delivery Date of the  instruments  described in this Agreement;
(xiv) initial fees,  initial  expenses,  initial  disbursements  and the initial
costs of distributing the Certificates  (but not the continuing fees,  expenses,
disbursements  and costs of  distribution) of SSB, as lessor under the Lease and
as  Owner   Trustee   under  the  Trust   Agreement  and  with  respect  to  the
administration of the Lease and the Lessor's Estate, of the Indenture Trustee as
trustee  under the  Indenture  with respect to the  administration  of the Trust
Indenture Estate and of the  Subordination  Agent acting under the Intercreditor
Agreement;  and (xv) any other  amounts  approved  by the  Lessee  and the Owner
Participant. The fees and expenses described in clauses (ii) through (x) of this
paragraph shall be allocable to the Owner  Participant  under this Agreement (1)
to the extent incurred  specifically with respect to the Owner Participant,  and
(2) to the extent such fees and expenses  are incurred but are not  specifically
attributable  to the Owner  Participant,  in the  proportion  that the principal
amount  of the  Certificates  bears  to the  total  amount  of the  Pass-Through
Certificates.

         The Owner  Participant,  the Owner  Trustee and the Lessee  acknowledge
that the  indicative  percentages  for Basic  Rent,  Stipulated  Loss  Value and
Termination Value and the indicative EBO Price to be set forth in the Lease have
been prepared  assuming the aggregate  amount  payable by the Owner  Participant
pursuant  to the  preceding  paragraph  is  2.9%  of  the  Purchase  Price  (the
"Estimated Expense Amount").

         (b)   Continuing   Expenses.   The   continuing   fees,   expenses  and
disbursements  (including  reasonable  counsel fees and  expenses) of the entity
acting as Owner  Trustee,  as lessor under the Lease and as Owner  Trustee under
the Trust  Agreement  with  respect to the  administration  of the Lease and the
Lessor's Estate and the continuing fees,  expenses and disbursements  (including
reasonable   counsel  fees  and  expenses  and  initial  fees  relating  to  the
establishment of any replacement  trustee) of the Indenture Trustee,  as trustee
under the Indenture with respect to the  administration  of the Trust  Indenture
Estate, the continuing fees,  expenses and disbursements  (including  reasonable
counsel fees and initial fees  relating to the  establishment  of a  replacement
trustee)  of the  Pass-Through  Trustee  and  the  Subordination  Agent  and the
continuing fees, expenses and disbursements  (including  reasonable counsel fees
and  initial  fees  relating to the  establishment  of a  replacement  liquidity
provider) of the Liquidity Providers under each Liquidity Facility shall be paid
as Supplemental  Rent by the Lessee,  including  without  limitation any amounts
payable to the  Indenture  Trustee or on account of  requests  by the  Indenture
Trustee for indemnification under Article XI of the Indenture.

         (c) Amendments,  Supplements and Appraisal.  Without  limitation of the
foregoing, the Lessee agrees:

                  (i) to pay as  Supplemental  Rent to the  Owner  Trustee,  the
         Owner  Participant,  any Owner  Participant  Guarantor,  the  Indenture
         Trustee,  the  Subordination  Agent,  the  Liquidity  Providers and the
         Pass-Through Trustee all costs and expenses (including reasonable legal
         fees and expenses)  incurred by any of them in connection  with (a) any
         Default  and  any  enforcement  or  collection   proceedings  resulting
         therefrom,  or (b) the  enforcement  of the  obligations  of the Lessee
         hereunder or under the other Operative Agreements,  including,  without
         limitation,   the  entering  into  or  giving  or  withholding  of  any
         amendments  or  supplements  or waivers  or  consents  (whether  or not
         consummated),  including without limitation, any amendment, supplement,
         waiver or consent resulting from any work-out, restructuring or similar
         proceeding  relating to the performance or nonperformance by the Lessee
         of its obligations under the Operative Agreements or (c) any amendment,
         supplement,  waiver or consent (whether or not entered into) under this
         Agreement,  the  Lease,  the  Indenture,  the  Certificates,   the  Tax
         Indemnity  Agreement,  the Purchase  Agreement  Assignment or any other
         Operative Agreement or document or instrument delivered pursuant to any
         of them, which amendment,  supplement, waiver or consent is required by
         any  provision of any Operative  Agreement  (including  any  adjustment
         pursuant to Section 3(d) of the Lease) or is requested by the Lessee or
         necessitated  by  the  action  or  inaction  of the  Lessee;  provided,
         however,  that the Lessee shall not be responsible for fees or expenses
         incurred in connection with the offer,  sale or other transfer (whether
         pursuant  to  Section   7.03(d)  hereof  or  otherwise)  by  the  Owner
         Participant,  the Owner Trustee,  the Indemnitee Trustee, or any Holder
         after the Certificate Closing Date of any interest in the Aircraft, the
         Lessor's Estate, the Beneficial  Interest or the Trust Agreement or any
         similar  interest  (and the offeror,  seller,  or  transferor  shall be
         responsible for all such fees and expenses), unless such offer, sale or
         transfer  shall occur (A)  pursuant to the  exercise of remedies  under
         Section 15 of the Lease,  or (B) in connection  with the termination of
         the Lease or action or  direction  of the  Lessee  pursuant  to Section
         3(g), 11, or 16 of the Lease; and

                  (ii) to pay  one-half of the fees,  costs and  expenses of all
         appraisers involved in an independent  appraisal of the Aircraft to the
         extent required under Section 16 of the Lease; provided that the Lessee
         shall pay all such fees, costs, and expenses of any appraisal conducted
         pursuant to Section 15 of the Lease.



                                   ARTICLE 11

                             SUCCESSOR OWNER TRUSTEE

         Section 11.01.  Appointment of Successor Owner Trustee. (a) Resignation
and Removal.  The Owner Trustee or any successor Owner Trustee may resign or may
be removed by the applicable  Owner  Participant,  and a successor Owner Trustee
may be appointed and a Person may become Owner Trustee under the Trust Agreement
only in accordance  with the  provisions of Section 3.11 of the Trust  Agreement
and the provisions of paragraphs (b) and (c) of this Section 11.01.

         (b)  Conditions  to  Appointment.  The  appointment  in any manner of a
successor Owner Trustee pursuant to Section 3.11 of the Trust Agreement shall be
subject to the following conditions:

                  (i)      such successor Owner Trustee shall be a Citizen of the United States;

                  (ii) such  successor  Owner Trustee shall be a bank or a trust
         company having combined  capital,  surplus and undivided  profits of at
         least  $100,000,000  or a bank or trust company  fully  guaranteed by a
         direct or indirect  parent thereof having a combined  capital,  surplus
         and undivided profits of at least $100,000,000;

                  (iii) such appointment shall not violate any provisions of the
         Transportation  Code  or  any  applicable  rule  or  regulation  of the
         applicable regulatory agency or body of any other jurisdiction in which
         the  Aircraft may then be  registered  or create a  relationship  which
         would be in violation of the Transportation Code or any applicable rule
         or regulation of the applicable  regulatory agency or body of any other
         jurisdiction in which the Aircraft may then be registered;

                  (iv)  such  successor   Owner  Trustee  shall  enter  into  an
         agreement or agreements,  in form and substance reasonably satisfactory
         to the Lessee, the Owner Participant,  the Pass-Through Trustee and the
         Indenture Trustee whereby such successor Owner Trustee confirms that it
         shall be deemed a party to this  Agreement,  the Trust  Agreement,  the
         Lease, the Lease Supplement,  the Purchase Agreement  Assignment,  [the
         Engine Warranty  Assignment],  the Indenture,  the Indenture Supplement
         and any other Operative Agreement to which the Owner Trustee is a party
         and agrees to be bound by all the terms of such documents applicable to
         the  Owner  Trustee  and  makes  the   representations  and  warranties
         contained  in  Section  7.04  hereof   (except  that  it  may  be  duly
         incorporated,  validly  existing and in good standing under the laws of
         the United States of America or any State thereof); and

                  (v) all  filings  of Uniform  Commercial  Code  financing  and
         continuation statements,  filings in accordance with the Transportation
         Code and amendments thereto shall be made and all further actions taken
         in connection  with such  appointment as may be necessary in connection
         with  maintaining the validity,  perfection and priority of the Lien of
         the Indenture and the valid and continued  registration of the Aircraft
         in accordance with the Transportation Code.

         (c) Appointment.  For so long as the Aircraft remains  registered under
the  Transportation  Code, the Owner  Participant  agrees to appoint  promptly a
successor Owner Trustee meeting the  requirements of Section 11.01 (b) hereof in
the event the Owner Participant has knowledge that the Owner Trustee at any time
shall not be a Citizen of the United States.



                                   ARTICLE 12

                        LIABILITIES AND INTERESTS OF THE
                          OWNER PARTICIPANT AND HOLDERS

         Section  12.01.   Liabilities  of  the  Owner  Participant.   No  Owner
Participant  shall  have any  obligation  or duty to the Lessee or to any Holder
with respect to the  transactions  contemplated by this Agreement,  except those
obligations or duties expressly set forth in this Agreement,  the Indenture, the
Trust Agreement,  the Tax Indemnity Agreement,  the Lease or any other Operative
Agreement  to which the Owner  Participant  is a party and no Owner  Participant
shall be liable  for the  performance  by any other  party  hereto of such other
party's obligations or duties hereunder.  Under no circumstances shall the Owner
Participant as such be liable to the Lessee,  nor shall the Owner Participant be
liable to any Holder, in each case for any action or inaction on the part of the
Owner Trustee or the Indenture  Trustee in connection with this  Agreement,  the
Indenture,  the Lease, the Trust Agreement,  the Purchase Agreement  Assignment,
any other Operative Agreement, the ownership of the Aircraft, the administration
of the Lessor's  Estate or the Trust Indenture  Estate or otherwise,  whether or
not such  action  or  inaction  is  caused by the  willful  misconduct  or gross
negligence of the Owner Trustee or the Indenture  Trustee,  except to the extent
of any action or inaction taken pursuant to the Owner  Participant's  directions
or instructions.

         Section  12.02.  Interest  of  Holders of  Certificates.  A Holder of a
Certificate  shall have no further  interest in, or other right with respect to,
the  Trust  Indenture  Estate  when and if the  principal  and  interest  on all
Certificates held by such Holder and all other sums payable to such Holder under
this Agreement,  under the Indenture and under such Certificates shall have been
paid in full.



                                   ARTICLE 13

                                 OTHER DOCUMENTS

         Section 13.01. Consent of Lessee to Other Documents.  The Lessee hereby
consents in all respects to the  execution  and delivery of the  Indenture,  the
Trust Agreement,  the  Intercreditor  Agreement and the Liquidity  Facilities as
initially  executed  and to all of the terms of such  documents,  and the Lessee
acknowledges  receipt of an executed  counterpart  of such  documents;  it being
agreed that such consent shall not be construed to require the Lessee's  consent
to any future  supplement to, or amendment,  waiver or modification of the terms
of the Indenture,  the Intercreditor Agreement or the Liquidity Facilities,  the
Trust Agreement or the Certificates, in each case as originally executed, except
that prior to the occurrence and continuance of an Event of Default,  no section
of the  Indenture,  the Trust  Agreement,  the  Intercreditor  Agreement  or the
Liquidity Facilities,  in each case as originally executed,  shall be amended or
modified in any manner materially adverse to the Lessee without its consent.

         Section 13.02.  Further  Assurances.  The Lessee hereby confirms to the
Owner  Participant its covenants set forth in and  obligations  under the Lease.
The Lessee agrees that, except as otherwise provided in the Indenture, the Owner
Trustee may not enter into any amendment, modification or supplement of, or give
any waiver or consent  with  respect  to, or approve  any matter or  document as
being  satisfactory  under the Lease  without the prior consent of the Indenture
Trustee and the Owner Participant and that, except as otherwise  provided in the
Indenture,  upon an Indenture Event of Default, the Indenture Trustee may act as
the Lessor  under the Lease to the  exclusion of the Owner  Trustee.  The Lessee
further agrees to deliver to the Indenture  Trustee and the Owner  Participant a
copy of each notice, statement,  request, report or other communication given or
required to be given to the Owner Trustee under the Lease.

         Section  13.03.   Pass-Through   Trustee's  and  Subordination  Agent's
Acknowledgment.  The  Pass-Through  Trustee and the  Subordination  Agent hereby
acknowledge  and  agree to be bound by all of the terms  and  conditions  of the
Indenture,  including  without  limitation,  Section 8.01 thereof  regarding the
rights  of  the  Owner  Participant  to  purchase  the  Certificates  under  the
circumstances specified therein.



                                   ARTICLE 14

                                     NOTICES

         Section 14.01.  Notices. All notices,  demands,  declarations and other
communications  required  by this  Agreement  shall be in  writing  and shall be
deemed received (a) if given by telecopier, when transmitted and the appropriate
telephonic  confirmation  received if  transmitted  on a Business Day and during
normal  business hours of the recipient,  and otherwise on the next Business Day
following  transmission,  or (b) if  given by  certified  mail,  return  receipt
requested,  by courier service,  or by any other  commercially  customary means,
when received or personally delivered, addressed:

                  (a) if to the Lessee, to its office at 515A Shaw Road, Dulles,
         Virginia 20166, Attention:  General Counsel,  telephone (703) 925-6000,
         facsimile (703) 925-6294;  or to such other address as the Lessee shall
         from time to time  designate  in writing to the Lessor,  the  Indenture
         Trustee and any Owner Participant;

                  (b) if to the  Lessor or the Owner  Trustee,  to its office at
         225 Asylum Street  (Goodwin  Square),  Hartford,  CT 06103,  Attention:
         Corporate Trust  Department,  telephone (860) 244-1822  facsimile (860)
         244-1889;  or to such other  address  as the Lessor  shall from time to
         time designate in writing to the Lessee and the Indenture Trustee, with
         a copy to the Owner Participant;

                  (c) if to the Indenture  Trustee,  the Subordination  Agent or
         the  Pass-Through  Trustee,  to its office at 25 South Charles  Street,
         Baltimore, MD 21201, Attention:  Corporate Trust Department,  telephone
         (410) 244-4626,  facsimile (410) 244-4236;  or to such other address as
         the Indenture Trustee or the Pass-Through  Trustee, as the case may be,
         shall from time to time designate in writing to the Lessor,  the Lessee
         and the Owner Participant; and

                  (d) if to the  Liquidity  Provider,  to its office at ING Bank
         N.V., Department of Bankgarantie  Zaken-Jurisdische  Zaken, Amsterdamse
         Poort, Bijlmer plein 888, 1102 MG Amsterdam, The Netherlands, telephone
         011-31-20-652-3260,  facsimile  011-31-20-652-3235,  with a copy to ING
         Lease  (Ireland)  B.V.  48 St.  Stephen's  Green,  Dublin  2,  Ireland,
         telephone 011-353-1-662-2211,  facsimile 011-353-1-662-2240; or to such
         other address as a Liquidity Provider shall from time to time designate
         in writing to the Lessor, the Lessee and the Indenture Trustee.



                                   ARTICLE 15

                           REFINANCING/REOPTIMIZATION

         Section 15.01. Refinancing.  (a) Subject to the terms and conditions of
this Section 15.01,  the Lessee may request an Owner  Participant to participate
in one  refinancing in whole but not in part, of the  Certificates  prior to the
end of the  Basic  Term (a  "Refinancing").  Such  Refinancing  may be placed in
either the private or public  markets and shall be  denominated in United States
dollars and shall be on terms reasonably  satisfactory to the Owner Participant.
The Owner Participant will agree to negotiate promptly in good faith to conclude
an agreement with the Lessee as to the terms of any such Refinancing transaction
(including  the  terms  of  any  debt  to be  issued  in  connection  with  such
refinancing  and the  documentation  to be  executed in  connection  therewith).
Without the prior written consent of the Owner  Participant,  the prospectus and
other  offering  materials  relating to any  Refinancing in the form of a public
offering  shall not  identify  the Owner  Participant  and shall not include any
financial  statements  of the Owner  Participant  or any Affiliate  thereof.  In
connection  with any such  Refinancing  in the  form of a public  offering,  the
Lessee shall indemnify the Owner Participant in a manner  satisfactory to it for
any liabilities under federal,  state or foreign  securities laws resulting from
such offering.  The aggregate principal amount of the new Certificates issued in
connection  with any  Refinancing  shall be the same as the aggregate  principal
amount outstanding on the Certificates being refinanced.

         (b)  Notwithstanding  anything  herein to the contrary,  no Refinancing
will be permitted unless the Owner  Participant and the Indenture  Trustee shall
have  received at least 15 days' prior written  notice of the scheduled  closing
date of such Refinancing and the Owner Participant shall have been provided such
longer period as it shall have required for a reasonable  opportunity  to review
the relevant  documentation  and the Owner  Participant shall have determined in
good  faith  that  neither  it nor the Owner  Trustee  shall  suffer any loss or
expense or bear any increased risk as a result of such  Refinancing  (including,
without limitation, any risk with respect to taxes or other adverse consequences
to the Owner Participant  including the application of Revenue  Procedures 75-21
and  75-28  and  Section  467 of the Code) for which it has not been or will not
have been indemnified by the Lessee in a manner  reasonably  satisfactory to the
Owner Participant and, if an additional indemnity is then provided by the Lessee
as the result of such  Refinancing  and the Owner  Participant  or the Indenture
Trustee  reasonably  deems itself insecure with respect to such  indemnity,  the
Lessee shall have provided  security or collateral for such  indemnity  which is
reasonably satisfactory to such Person nor would such transaction materially and
adversely affect the rights and obligations of Owner Participant.

         Prior to the  consummation of any Refinancing  pursuant to this Section
15.01, the Owner  Participant and the Lessee shall agree upon a schedule setting
forth each  installment of Basic Rent and setting forth  Stipulated  Loss Values
and  Termination  Values  payable  pursuant  to the  Lease  as a  result  of the
Refinancing  in accordance  with Section 3(d) of the Lease,  and  thereafter the
amounts set forth in such  schedule  shall become the amounts  payable under the
Lease.  Upon the consummation of the  Refinancing,  the evidence of indebtedness
issued  pursuant  to the  Refinancing  shall be  considered  "Certificates"  for
purposes of this Agreement, the Lease and the Indenture.

         (c) Notwithstanding the foregoing,  the Owner Participant shall have no
obligation to proceed with any  Refinancing  transaction as contemplated by this
Section  15.01  unless the Lessee  indemnifies  the Owner  Trustee and the Owner
Participant by agreement in form and substance satisfactory to each of them, for
any  liability,  obligation  (other than the  obligation  to pay  principal  and
interest in respect of the refinanced indebtedness), cost or expense (including,
without limitation,  reasonable  attorneys' fees and Make-Whole Premium or other
amounts due under the  Indenture),  including  any adverse tax  consequences  or
impact,  related to or arising out of any such  Refinancing  transaction and, if
the Owner  Participant  reasonably  deems itself  insecure  with respect to such
indemnity,  the Lessee  shall have  provided  security  or  collateral  for such
indemnity which is reasonably satisfactory to the Owner Participant.

         (d) Without the prior written consent of the Owner  Participant,  which
consent may be withheld in its sole discretion,  no such  refinancing  shall (1)
cause the aggregate  principal  amount of the indebtedness to be substituted for
the  Certificates  to  exceed  the  aggregate   principal  amount  of  the  then
outstanding   Certificates,   (2)  cause  the  weighted  average  life  of  such
indebtedness  to be  different  by more than  three  months  than the  remaining
weighted  average life of the then  outstanding  Certificates,  or (3) cause the
date of maturity of such  indebtedness  to be later than the date of maturity of
the Certificates being refinanced.

         (e) Each  party  agrees  to take or cause  to be  taken  all  requested
action,  including,  without  limitation,  the  execution  and  delivery  of any
documents  and  instruments,   including,  without  limitation,   amendments  or
supplements  to the Lease,  which may be  reasonably  necessary  or desirable to
effect  such  Refinancing,  including,  in the  case of the  Owner  Participant,
direction  to  the  Owner  Trustee  by  the  Owner  Participant  to  prepay  the
Certificates then outstanding; provided, however, that such Refinancing shall be
subject to the satisfaction of each of the following conditions:

                  (i) Payment of principal, accrued interest, Make-Whole Premium
         and  breakage  costs,  if any,  and all other sums due and owing on the
         Certificates payable under the Indenture;

                  (ii)  Payment in full of all other  amounts then due and owing
         by the Lessee under this Agreement, the Indenture, the Lease, the Trust
         Agreement,  and the Certificates  then outstanding shall have been made
         by the Lessee;

                  (iii) Such party shall have  received such opinions of counsel
         (including,  without  limitation,  an  opinion  received  by the  Owner
         Participant from independent tax counsel reasonably satisfactory to the
         Lessee  that such  Refinancing  shall not  result  in any  adverse  tax
         consequences  to such Owner  Participant,  unless the Lessee shall have
         agreed  to  provide  an   indemnity  in  respect   thereof   reasonably
         satisfactory   in  form  and  substance  to  the  Owner   Participant),
         certificates and other documents as it may reasonably request,  each in
         form and substance reasonably satisfactory to such party;

                  (iv) All  authorizations,  approvals and consents which in the
         reasonable  judgment of the Owner  Participant  are  necessary for such
         Refinancing shall have been obtained;

                  (v) The Lessee shall have provided or agreed to provide to the
         Owner  Participant,  as Supplemental  Rent under the Lease,  sufficient
         funds to pay any  breakage  costs,  Make-Whole  Premium  and any  other
         amounts due under the Indenture;

                  (vi) The  satisfaction  or waiver by each other  party to this
         Agreement of the  conditions  set forth in this  Section  15.01 to such
         party's obligations under this Section 15.01;

                  (vii)  No  Specified   Default  shall  exist  or  would  occur
         immediately after giving effect to such Refinancing;

                  (viii) In the event the Lessee shall not prohibit the purchase
         of the  Refinancing  loan  certificates  by, or with the  assets of, an
         employee  benefit plan,  as defined in Section 3(3) of ERISA,  which is
         subject to Title I of ERISA or a plan or individual retirement account,
         which is  subject  to Section  4975(c)  of the Code,  (individually  or
         collectively, an "ERISA Plan"), the Lessee will permit the placement of
         the Refinancing loan certificates with an ERISA Plan only if either (A)
         if such placement is in the form of pass-through certificates, the sole
         underwriter or the manager or co-manager of the underwriting  syndicate
         or the selling or  placement  agent of such  pass-through  certificates
         represents to the Lessee that it has a prohibited transaction exemption
         from  the  U.S.  Department  of  Labor  with  respect  to  Pass-Through
         certificates  (such as Prohibited  Transaction  Exemption  89-88 or any
         other  comparable  exemption) or (B) purchasers of the Refinancing loan
         certificates  (or if the Refinancing  involves the issuance and sale of
         pass-through    certificates,    purchasers   of   such    pass-through
         certificates)  provide a representation  (which may be in the form of a
         deemed  representation)   regarding  their  source  of  funds  used  in
         acquiring  the  Refinancing  loan  certificates  (or such  pass-through
         certificates,  as the case may be) and,  if such  purchasers  represent
         that they are using funds of an ERISA Plan in acquiring the Refinancing
         loan certificates (or such pass-through  certificates,  as the case may
         be), such purchasers further represent that (1) either they are relying
         on a prohibited transaction exemption from the U.S. Department of Labor
         with  respect to their  purchase  and holding of the  Refinancing  loan
         certificates (or such  pass-through  certificates,  as the case may be)
         and they provide  representations  regarding  the  satisfaction  of the
         relevant  conditions  of such an  exemption  or (2) their  purchase and
         holding of the  Refinancing  loan  certificates  (or such  pass-through
         certificates,  as the case may be) will  not  constitute  a  non-exempt
         prohibited  transaction  under  Section 406 of ERISA or Section 4975 of
         the Code. The reliance on any such exemption will not be conditional on
         the Owner Participant's representation concerning its party in interest
         or other status with respect to ERISA Plans; and

                  (ix) The Lessee  shall pay all costs and  expenses  (including
         legal  fees)  incurred  in  connection  with any  proposed  or actually
         consummated Refinancing.

 . (a) Upon the Lessee's  request,  at the Lessee's  expense,  and subject to the
conditions in Section 15.02(c),  the Owner Trustee,  any Owner Participant,  the
Lessee and the Indenture  Trustee will  cooperate  with each other to reoptimize
(but not more than twice) the unpaid  principal of the outstanding  Certificates
and the  amortization  schedule  therefor in connection  with any adjustments to
Basic Rent, EBO Price, EBO Date,  Stipulated Loss Values, and Termination Values
pursuant  to  ss.  3(d)  of  the  Lease  as a  result  of a  Refinancing  of the
Certificates in accordance with Section 15.01 hereof, provided that, in any such
reoptimization,  (1) the outstanding  principal amount of the Certificates shall
not be  increased,  (2) the  final  maturity  of the  Certificates  shall not be
extended,  (3) the average life to maturity of the  Certificates  shall not vary
from the average life to maturity of the initial Certificates by more than three
months,  (4) any installment of principal of the  Certificates  will not vary by
more than 5% from such  installment in the initial Loan  Certificate,  (5) there
shall be no change in the Debt Portion,  (6) the adjusted Stipulated Loss Values
and Termination Values shall not exceed the original  Stipulated Loss Values and
Termination  Values under the Lease (as adjusted in accordance  with clauses (1)
and (2) of ss.  3(d) of the  Lease),  and (7) any change to the EBO Price or EBO
Date must be  supported  by an appraisal  reasonably  satisfactory  to the Owner
Participant.  As promptly  as  practicable  following  such  request,  the Owner
Participant  shall deliver to the Lessee,  the Owner Trustee,  and the Indenture
Trustee, a certificate of an authorized  representative of the Owner Participant
(the "Reoptimization  Certificate") setting forth (x) the amortization schedules
which,  taking into account the  requirements  of ss. 3(d) and (e) of the Lease,
would  result in the  lowest  Net  Present  Value of Rents,  and the  lowest net
present  value (to the  Lessee)  of Basic Rent over the Basic  Term,  discounted
semi-annually at the Debt Rate, and (y) the corresponding changes in Basic Rent,
EBO Price, EBO Date, Stipulated Loss Values, and Termination Values, computed in
a manner consistent with ss. 3(d) of the Lease. Upon the Lessee's  acceptance of
the  adjustments   set  forth  in  the   Reoptimization   Certificate,   or  the
redetermination  thereof pursuant to the verification  procedures in ss. 3(d) of
the Lease,  and subject to compliance in full with the  conditions  set forth in
Section  15.02(c),  the  Owner  Participant  shall  (aa)  deliver  a copy of the
Reoptimization  Certificate to the Owner Trustee, and the Indenture Trustee, and
(bb) cause the Owner Trustee (xx) to execute and deliver amendments to the Lease
and Indenture  setting forth the adjustments (the date of such amendment,  being
the  "Reoptimization  Date"),  and (yy) to issue or  exchange  new  Certificates
containing the revised  amortization  thereof for the outstanding  Certificates.
The Lessee shall give to the Owner  Participant  at least 30 days' prior written
notice of the Lessee's intent to effect a reoptimization  hereunder. Such notice
shall be revocable,  and need not specify any  particular  date as of which such
reoptimization shall be effected.

         (b)  Adjustments to  Refinancing  Certificates.  On the  Reoptimization
Date,  subject to the satisfaction on or before the  Reoptimization  Date of the
conditions  set forth in  Section  15.02(c),  the Owner  Trustee  will issue and
deliver  and the  Indenture  Trustee  will  authenticate,  and each  holder of a
Refinancing  Certificate will accept delivery of, a new Refinancing  Certificate
or Refinancing Certificates (in replacement of each Refinancing Certificate then
held by such holder, which Refinancing  Certificates shall be surrendered to the
Indenture   Trustee  for   cancellation)   containing  such  changed   principal
installments (expressed as a percentage of the original principal amount of such
Refinancing   Certificate)  as  shall  have  been   recalculated  by  the  Owner
Participant, but in the same principal amount as, and containing terms identical
to, except as otherwise contemplated by Section 15.02(d) hereof, the Refinancing
Certificates originally issued in connection with the Operative Agreements.

         (c)  Conditions.  Any  such  reoptimization  shall  be  subject  to the
satisfaction of the following conditions:

                  (1)      no Specified Default shall exist;

                  (2) appropriate  agreements,  amendments,  or supplements,  in
         form and substance  reasonably  satisfactory  to the Lessee,  the Owner
         Participant,  the Owner Trustee,  and the Indenture  Trustee,  shall be
         executed and delivered;

                  (3) Basic Rent, EBO Price, EBO Date,  Termination  Values, and
         Stipulated  Loss Values  shall,  subject to ss.  3(e) of the Lease,  be
         adjusted in the manner set forth in ss. 3(d) of the Lease;

                  (4) all  necessary  authorization,  approvals,  consents,  and
         recordings  (including any recordings or filings with the FAA) shall be
         obtained or accomplished; and

                  (5) neither the Owner  Participant  nor the Owner  Trustee nor
         the  Indenture  Trustee shall suffer any loss or expense or adverse tax
         or other consequences  (including with respect to matters arising under
         ERISA and any adverse tax  consequences  resulting from the application
         of  Revenue  Procedure  75-21 or  75-28  or Code  ss.  467) or bear any
         increased risk  (including,  with respect to the Owner  Participant and
         the  Owner  Trustee,  any  material  risk  of a  change  in  accounting
         treatment  of the Lease) as a result of such  reoptimization  for which
         the  Lessee  has  not  agreed  to  indemnify  in  a  manner  reasonably
         satisfactory  to such Person,  and, in connection  with the  foregoing,
         (aa) the Owner  Participant  shall be  entitled  to  receive an opinion
         (reasonably satisfactory to the Owner Participant) of counsel (selected
         by the Owner Participant and reasonably  satisfactory to the Lessee) of
         any   adverse   tax  or  other   consequences   resulting   from   such
         reoptimization,  and (bb) the Owner  Participant  shall be  entitled to
         receive an opinion of the  accounting  firm regularly used by the Owner
         Participant of any material risk of a change in accounting treatment of
         the Lease resulting from such reoptimization.



                                   ARTICLE 16

                                 CONFIDENTIALITY

         Section 16.01. Confidentiality.  Each party hereto agrees (on behalf of
itself and each of its Affiliates,  agents, directors,  officers,  employees and
representatives)  to  use  reasonable  precautions  to  keep  confidential,   in
accordance with its customary procedures for handling  confidential  information
of this  nature,  the  Operative  Agreements  other  than the  Lease,  the Lease
Supplement,  the Indenture, the Indenture Supplement,  and FAA Bill of Sale (the
"Confidential Documents") and any non-public information supplied to it pursuant
to this Agreement which is identified by the Person  supplying the same as being
confidential  at the time the same is  delivered  to such party,  provided  that
nothing herein shall limit the disclosure of any such  Confidential  Document or
any such information (i) to the extent required by statute,  rule, regulation or
judicial process,  (ii) to counsel for any of the parties hereto,  (iii) to bank
examiners or similar regulatory  authorities,  auditors or accountants,  (iv) in
connection with any litigation to which any one or more of the parties hereto is
a  party  relating  to the  transactions  contemplated  hereby  or by any of the
Operative  Agreements,  (v) to an Affiliate of the parties  hereto,  (vi) to any
assignee  or  participant  (or  prospective  assignee or  participant)  or other
transferee so long as such assignee or participant (or  prospective  assignee or
participant) or other  transferee  first executes and delivers to the respective
party  making such  assignment  or  participation  an agreement in writing to be
bound by the  provisions of this Section 16.01 or (vii) in the case of the Owner
Participant  or the Owner Trustee (in its  individual or trust  capacity) to the
Owner Trustee (in its individual or trust capacity) or to the Owner Participant,
as the case may be.



                                   ARTICLE 17

                                  MISCELLANEOUS

         Section 17.01.  Reserved.

         Section  17.02.  Collateral  Account.  (a) The Indenture  Trustee shall
notify the Owner Trustee and the Lessee of any losses  incurred on the Specified
Investments in the Collateral Account promptly upon the realization  thereof, as
well as any fees,  commissions and other costs,  Taxes (other than income taxes)
and expenses,  if any,  incurred by the Indenture Trustee in connection with its
administration of the Collateral Account (collectively, "Losses"). Promptly upon
receipt of such notification but, in any event, no later than the earlier of the
Delivery Date (or, if later,  the last day of any investment  period referred to
in Section  2.14(b) of the Indenture  during which the Delivery Date occurs) and
the 15th day after the  Cut-Off  Date,  the  Lessee  shall pay to the  Indenture
Trustee,  on  behalf of the  Owner  Trustee,  for  deposit  into the  Collateral
Account,  an amount  equal to such Losses (net of any  investment  earnings  not
previously applied pursuant to this Section 17.02).

         (b) The Lessee shall pay to the Indenture  Trustee (or will provide for
payment thereof pursuant to a permitted  drawing by the Indenture  Trustee under
the Letter of Credit),  on behalf of the Owner  Trustee (A) on each Payment Date
prior to the Delivery Date an amount equal to the  aggregate  amount of interest
accrued on the Certificates from (and including) the Certificate Closing Date or
previous Payment Date, as the case may be, to, but excluding,  such Payment Date
(net of any investment earnings in the Collateral Account not previously applied
pursuant to this Section 17.02) and (B) on the Delivery Date,  interest  accrued
on the  Certificates  from and including the last Payment Date (or, if none, the
Certificate  Closing  Date),  to, but  excluding,  the Delivery Date (net of any
investment earnings in the Collateral Account not previously applied pursuant to
this Section  17.02) (and the  Indenture  Trustee shall provide the Lessee prior
written  notice of any such amount due from the Lessee on any such  Payment Date
or the Delivery Date). In addition, the Lessee will pay to the Indenture Trustee
on behalf of the Owner Trustee all amounts owed by the Owner Trustee pursuant to
clause (b) of the last paragraph of Section 2.04 of the Indenture.

         (c) If the Aircraft has not been  purchased by the Owner  Trustee on or
before the Cut-Off Date and the Certificates have not been assumed by the Lessee
in  accordance  with Section  3.05(a)  hereof,  the Lessee  agrees to pay to the
Indenture Trustee, on behalf of the Owner Trustee, on the 15th day following the
Cut-Off Date the excess, if any, of the amounts payable under Section 6.02(b)(1)
of the Indenture  over the amounts  released from the  Collateral  Account under
Section 2.16 of the Indenture.

         (d) All amounts  payable by the Lessee  pursuant to this Section  17.02
shall be paid to the  Indenture  Trustee  at its  principal  office  at 25 South
Charles  Street,   Baltimore,   Maryland  21201,   Attention:   Corporate  Trust
Department,  or as the Indenture  Trustee may otherwise direct within the United
States, by wire transfer of immediately available funds in U.S. Dollars no later
than 10:30 a.m., New York City time, on the due date of such payment.

         Section  17.03.  Counterparts.  This  Agreement  may be executed by the
parties in separate  counterparts,  each of which when so executed and delivered
shall be an original,  but all such counterparts  shall together  constitute but
one and the same instrument.

         Section 17.04. No Oral Modifications. Neither this Agreement nor any of
its terms may be terminated,  amended, supplemented,  waived or modified orally,
but only by an  instrument  in  writing  signed by the party  against  which the
enforcement of the termination, amendment, supplement, waiver or modification is
sought.  No  such  written  termination,   amendment,   supplement,   waiver  or
modification  shall be effective  unless a signed copy shall have been delivered
to and executed by the Owner Trustee and the Indenture  Trustee.  A copy of each
such termination,  amendment,  supplement,  waiver or modification shall also be
delivered to each other party to this Agreement.

         The consent of each of the Pass-Through  Trustee and the  Subordination
Agent,  in its capacity as a party to this Agreement and not as a Holder,  shall
not be required to modify,  amend or  supplement  this  Agreement or to give any
consent, waiver,  authorization or approval with respect to this Agreement under
the  circumstances  in which the consent of the  Indenture  Trustee would not be
required  for such  modification,  amendment,  supplement,  consent,  waiver  or
approval in accordance with Section 8.01(b) of the Indenture,  provided that the
Pass-Through  Trustee  shall be  entitled  to receive an Opinion of Counsel  (as
defined in the Pass-Through  Agreement)  necessary,  in its sole discretion,  to
establish that the Indenture  Trustee's consent would not be required under such
circumstances.

         Section 17.05. Captions. The table of contents preceding this Agreement
and the headings of the various  Articles and Sections of this Agreement are for
convenience of reference only and shall not modify,  define, expand or limit any
of the terms or provisions of this Agreement.

         Section  17.06.  Successors  and Assigns.  The terms of this  Agreement
shall be binding  upon,  and shall  inure to the  benefit of, the Lessee and its
successors and permitted assigns, the Subordination Agent and its successors and
permitted  assigns,  including without  limitation each Holder of a Certificate,
the Owner  Participant  and its  successors  and  permitted  assigns,  the Owner
Trustee and its  successors as Owner Trustee (and any  additional  owner trustee
appointed) under the Trust Agreement,  the Indenture  Trustee and its successors
as Indenture Trustee (and any additional  indenture trustee appointed) under the
Indenture  and the  Pass-Through  Trustee  and its  successors  as  Pass-Through
Trustee (and any additional Pass-Through trustee appointed).

         Section 17.07. Concerning the Owner Trustee,  Indenture Trustee and the
Pass-Through  Trustee.  Each of SSB and FNBM is  entering  into  this  Agreement
solely in its capacities (except to the extent otherwise  expressly  indicated),
in the case of SSB, not in its  individual  capacity but solely as Owner Trustee
under the Trust Agreement,  in the case of FNBM, not in its individual  capacity
but solely as Indenture Trustee under the Indenture and as Pass-Through  Trustee
under the Pass-Through Agreement,  and except as otherwise expressly provided in
this Agreement or in the Lease, the Indenture, the Pass-Through Agreement or the
Trust  Agreement,  neither  SSB nor FNBM  shall be  personally  liable for or on
account of its statements, representations, warranties, covenants or obligations
under this Agreement;  provided,  however, that each of SSB and FNBM accepts the
benefits  running to it under this  Agreement,  and each agrees that  (except as
otherwise  expressly provided in this Agreement or any other Operative Agreement
to which it is a party) it shall be liable in its  individual  capacity  for (a)
its own gross  negligence  or willful  misconduct  (whether  in its  capacity as
trustee or in its individual  capacity),  (b) any breach of representations  and
warranties or any breach of covenants made in its individual  capacity  pursuant
to or in connection  with this  Agreement or the other  Operative  Agreements to
which it is a party,  (c) any breach,  in the case of the Owner Trustee,  of its
covenants contained in Sections 3.05 and 3.08 of the Indenture,  (d) the failure
to use ordinary care in receiving,  handling and  disbursing  funds,  (e) in the
case of the Owner Trustee,  Lessor's Liens  attributable to it in its individual
capacity,  (f) in the case of the Indenture Trustee,  Indenture Trustee's Liens,
and (g) taxes,  fees or other charges on, or based on, or measured by, any fees,
commissions or compensation  received by it in connection with the  transactions
contemplated by the Operative Agreements.

         Section 17.08.  Severability.  Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction  shall, as to such jurisdiction,
be ineffective to the extent of such  prohibition  or  unenforceability  without
invalidating   the   remaining   provisions,   and  any  such   prohibition   or
unenforceability   in  any   jurisdiction   shall  not   invalidate   or  render
unenforceable such provision in any other jurisdiction.

         Section  17.09.  Public Release of  Information.  Subject to applicable
legal requirements (including, without limitation, securities laws requirements,
other regulatory requirements and other legally compelled disclosures),  so long
as there  shall not have  occurred  an Event of  Default or  Indenture  Event of
Default,  each party to this Agreement  shall in each instance  obtain the prior
written approval of each other party to this Agreement concerning the exact text
and timing of news  releases,  articles  and other  information  releases to the
public media  concerning  any  Operative  Agreements [; provided that the Lessee
may,  without the prior written  approval of each other party hereto,  make such
disclosures and announcements concerning its fleet constitution as are customary
in  the  airline  industry  so  long  as  no  such  disclosure  or  announcement
specifically identifies any other party hereby by name without the prior written
consent of such party].

         Section 17.10.  Certain  Limitations on  Reorganization.  The Indenture
Trustee  and the  Pass-Through  Trustee  agree  that,  if (i) the Owner  Trustee
becomes or all or any part of the  Lessor's  Estate or the trust  created by the
Trust Agreement becomes the property of, a debtor subject to the  reorganization
provisions  of  the  Bankruptcy  Code  or any  other  applicable  bankruptcy  or
insolvency statutes,  (ii) pursuant to any such reorganization  provisions,  the
Owner  Participant is held to have recourse  liability to the debtor,  the Owner
Trustee or the trustee of the debtor  directly or  indirectly  on account of any
amount payable as Make-Whole Premium, principal or interest on the Certificates,
or any other amount payable on any Certificate that is provided in the Operative
Agreements to be  nonrecourse to the Owner  Participant  and (iii) the Indenture
Trustee actually  receives any Recourse Amount which reflects any payment by the
Owner  Participant  on account of (ii) above,  then the Indenture  Trustee shall
promptly refund to the Owner  Participant such Recourse Amount.  For purposes of
this Section 17.10,  "Recourse  Amount" means the amount by which the portion of
such payment by the Owner  Participant  on account of clause (ii) above received
by the  Indenture  Trustee  exceeds the amount which would have been received by
the Indenture  Trustee if the Owner  Participant  had not become  subject to the
recourse liability referred to in (ii) above.  Nothing contained in this Section
shall prevent the Indenture  Trustee from  enforcing any  individual  obligation
(and  retaining  the  proceeds  thereof)  of the Owner  Participant  under  this
Agreement  or, any other  Operative  Agreement  to the extent  herein or therein
provided,  for which the Owner  Participant has expressly agreed by the terms of
this Agreement to accept individual responsibility.

         Section 17.11.  GOVERNING LAW. THIS AGREEMENT IS BEING DELIVERED IN THE
SATE OF NEW YORK,  AND SHALL IN ALL  RESPECTS BE GOVERNED  BY, AND  CONSTRUED IN
ACCORDANCE  WITH,  THE LAWS OF THE STATE OF NEW YORK,  INCLUDING  ALL MATTERS OF
CONSTRUCTION,  VALIDITY AND PERFORMANCE,  WITHOUT GIVING EFFECT TO PRINCIPLES OF
CONFLICTS OF LAWS.

         Section 17.12.  Section 1110 Compliance.  The parties hereto agree that
the transactions contemplated by the Operative Agreements are expressly intended
to be,  shall be, and should be  construed  so as to be entitled to the benefits
and protection of Section 1110 of the Bankruptcy Code.

         Section  17.13.  Reliance of Liquidity  Providers.  Each of the parties
hereto agrees and  acknowledges  that each  Liquidity  Provider shall be a third
party beneficiary of each of the  representations  and warranties made herein by
such party (and of each  covenant  herein  made by such party to each  Liquidity
Provider),  and that each Liquidity  Provider may rely on such  representations,
warranties  and  covenants  to  the  same  extent  as if  such  representations,
warranties  and covenants  were made to such Liquidity  Provider  directly.  The
terms of this Agreement  shall inure to the benefit of each Liquidity  Provider,
their respective successors and permitted assigns.


<PAGE>


         IN  WITNESS  WHEREOF,   the  parties  have  caused  this  Participation
Agreement to be executed by their respective,  duly authorized officers and this
Participation Agreement shall be effective this __ day of September, 1997.

                                                              Lessee:

                                                              ATLANTIC COAST AIRLINES


                                                              By:
                                                                   Name:
                                                                   Title:


                                                              By:
                                                                   Name:
                                                                   Title:



                                                              Initial Owner Participant:

                                                              ATLANTIC COAST AIRLINES


                                                              By:
                                                                   Name:
                                                                   Title:


                                                              By:
                                                                   Name:
                                                                   Title:





<PAGE>


                                                              Owner Trustee:

                                                              STATE  STREET BANK
                                                              AND TRUST  COMPANY
                                                              OF    CONNECTICUT,
                                                              NATIONAL
                                                              ASSOCIATION not in
                                                              its     individual
                                                              capacity,   except
                                                              as       otherwise
                                                              expressly provided
                                                              herein  but solely
                                                              as Owner Trustee


                                                              By:
                                                                   Name:
                                                                   Title:


                                                              Indenture Trustee:

                                                              THE FIRST NATIONAL
                                                              BANK OF  MARYLAND,
                                                              not     in     its
                                                              individual
                                                              capacity except as
                                                              otherwise
                                                              expressly provided
                                                              herein, but solely
                                                              as       Indenture
                                                              Trustee


                                                              By:                                                ,
                                                                   Name:
                                                                   Title:


                                                              Pass-Through Trustee:

                                                              THE FIRST NATIONAL
                                                              BANK OF  MARYLAND,
                                                              not     in     its
                                                              individual
                                                              capacity except as
                                                              otherwise
                                                              expressly provided
                                                              herein, but solely
                                                              as    Pass-Through
                                                              Trustee


                                                              By:
                                                                   Name:
                                                                   Title:




<PAGE>


                                                              Subordination Agent:

                                                              THE FIRST NATIONAL
                                                              BANK OF  MARYLAND,
                                                              not     in     its
                                                              individual
                                                              capacity except as
                                                              otherwise
                                                              expressly provided
                                                              herein, but solely
                                                              as   Subordination
                                                              Agent


                                                              By:
                                                                   Name:
                                                                   Title:


<PAGE>





                                   SCHEDULE II

                             CERTIFICATE INFORMATION




1        Atlantic Coast Airlines 1997-1 Pass-Through Trust Class A Atlantic Coast Airlines Trust No. _____
                                                                   ---------------------------------------

         Interest Rate:
         Maturity:
         Principal Amount:


2.       Atlantic Coast Airlines 1997-1 Pass-Through Trust Class B Atlantic Coast Airlines Trust No._____

         Interest Rate:
         Maturity:
         Principal Amount:


3.       Atlantic Coast Airlines 1997-1 Pass-Through Trust Class C Atlantic Coast Airlines Trust No. _____

         Interest Rate:
         Maturity:
         Principal Amount:

4.       Atlantic Coast Airlines 1997-1 Pass-Through Trust Class D Atlantic Coast Airlines Trust No. _____

         Interest Rate:
         Maturity:
         Principal Amount:





<PAGE>





                                  SCHEDULE III

                                  DEBT PORTION


Debt Portion




<PAGE>



                                                        SCHEDULE IV

                                                  MANDATORY ECONOMIC TERMS



         Any  amendment  and  restatement  of  the  Operative  Documents  on the
Delivery Date or, if earlier, the Transfer Date shall require that:

         (i)      with  respect  to each  series  of  Certificates  issued  with
                  respect to the Aircraft the schedule of principal payments may
                  be changed but:

                  (a)      the final maturity may not be extended beyond January
                           1, 2014,  for the Series A  Certificates,  January 1,
                           2011, for the Series B Certificates, January 1, 2007,
                           for the Series C  Certificates,  and January 1, 2000,
                           for the Series D Certificates;

                  (b)      the average  life of any series of  Certificates  may
                           not be so great as to cause the  average  life of the
                           corresponding  Class of Pass-Through  Certificates to
                           be more  than  10.2  years  in the  case  of  Class A
                           Pass-Through  Certificates,  8.3 years in the case of
                           Class B Pass-Through  Certificates,  5.6 years in the
                           case of the Class C Pass-Through Certificates and 1.0
                           years   in  the   case  of   Class   D   Pass-Through
                           Certificates  (but in each case may be  decreased  by
                           any amount);

                  (c)      the interest rate and the January 1 and July 1 payment dates may not be changed; and

                  (d)      the  loan  to  aircraft  value  ratio  on any  July 1
                           Distribution  Date (as  defined  in the  Pass-Through
                           Agreement)  shall not exceed 35.0% in the case of the
                           Series  A  Certificates,  50.0%  in the  case  of the
                           Series  B  Certificates,  65.0%  in the  case  of the
                           Series C  Certificates  and  70.0% in the case of the
                           Series D Certificates.

         (ii)     Basic  Rent,  Stipulated  Loss Values and  Termination  Values
                  under the Lease must be  sufficient  to pay  amounts  due with
                  respect to the Certificates;

         (iii)    the amounts payable under the all-risk aircraft hull insurance
                  maintained  with respect to the Aircraft must be sufficient to
                  pay  the   Stipulated   Loss  Value,   subject  to  rights  of
                  self-insurance; and

         (iv)     (a)      the Past Due Rate in the Indenture and the Lease;

                  (b)      the Make-Whole Premium payable under the Indenture;

                  (c)      the  provisions  relating to the  prepayment  and  purchase of the  Certificates  in the
                           Indenture;

                  (d)      the minimum liability insurance amount on the Aircraft in the Lease; and

                  (e)      the   indemnification   of  the  Indenture   Trustee,
                           Subordination     Agent,     Liquidity     Providers,
                           Pass-Through  Trustee and Holders of the Certificates
                           with respect to certain taxes and expenses;

         in each  case,  must be  provided  as set  forth  in the  Participation
         Agreement,  Lease and Indenture, as the case may be as in effect on the
         Certificate Closing Date.



<PAGE>





                                                         SCHEDULE V

                                                  MANDATORY DOCUMENT TERMS



         Any  amendment  and  restatement  of the  Operative  Agreements  on the
Delivery Date or, if earlier, the Transfer Date:

         1.       May not modify in any  material  adverse  respect the Granting
                  Clause of the  Indenture  so as to  deprive  the  Holders of a
                  first priority  security  interest in and mortgage lien on the
                  Aircraft and the Lease or to eliminate any of the  obligations
                  secured  thereby or otherwise  modify in any material  adverse
                  respect  as  regards  the   interests  of  the  Holders,   the
                  Subordination  Agent, the Liquidity Providers or the Indenture
                  Trustee  the  provisions  of  Article  II, V, or VI or Section
                  7.01, 7.02, 7.10, 7.11, 9.08, 13.01,  13.02, 13.07 or 15.04 or
                  Article VIII of the Indenture;

         2.       May not modify in any material  adverse respect as regards the
                  interests  of  the  Holders,   the  Subordination  Agent,  the
                  Liquidity Providers or the Indenture Trustee the provisions of
                  Section 3(e), 3(f), 4, 7, 11(a)(i)(dd),  12(c)(1),  the second
                  sentence of 23(f) or 26 of the Lease or  otherwise  modify the
                  terms of the Lease so as to deprive the  Indenture  Trustee of
                  rights expressly granted to the "Indenture Trustee" therein;

         3.       May not modify in any material  adverse  respect as regards the  interests  of the  Holders,  the
                  Subordination  Agent, the Liquidity  Providers or the Indenture Trustee the provisions of Section
                  4.02(e),  4.02(f),  17.02,  17.11,  17.12  or  17.13  of the  Participation  Agreement  or of the
                  provisions of Section 4.01(k) of the  Participation  Agreement so as to eliminate the requirement
                  to  deliver  to the  Indenture  Trustee  the  legal  opinions  to be  provided  to  such  Persons
                  thereunder  (recognizing  that the  lawyers  rendering  such  opinions  may be changed) or of the
                  provisions  of  Section  6.03(b) of the  Participation  Agreement  as  regards  the rights of the
                  Indenture  Trustee  thereunder or otherwise  modify the terms of the  Participation  Agreement to
                  deprive  the  Subordination  Agent,  the  Liquidity  Providers  or the  Indenture  Trustee of any
                  indemnity or right of reimbursement in its favor for Expenses or Taxes.

         4.       May not modify in any material  adverse respect as regards the
                  interests of the holders of the Pass Through Certificates, the
                  Subordination  Agent, the Liquidity Providers or the Indenture
                  Trustee,   the   definition   of   "Make-Whole   Premium"   or
                  "Supplemental   Rent"  in  Schedule  I  to  the  Participation
                  Agreement; and

         5.       Shall  contain  representations  and  warranties  of the Owner
                  Participant  substantially  similar  to  those  set  forth  on
                  Exhibit A attached hereto.

         Notwithstanding the foregoing,  any such Mandatory Document Term may be
modified to correct or supplement any such  provision  which may be defective or
to cure any  ambiguity  or correct any  mistake,  provided  that any such action
shall  not  materially  adversely  affect  the  interests  of the  Holders,  the
Subordination  Agent,  the Liquidity  Providers,  the  Indenture  Trustee or the
holders of the Pass Through Certificates.





<PAGE>


                                                  EXHIBIT A TO SCHEDULE V

         Section ___.  Representations,  Warranties  and  Covenants of Owner  Participant.  (a)  Representations,
Warranties and Covenants.  In addition to and without limiting its other  representations  and warranties  provided
for in this Article __, the Owner Participant represents and warrants that:

                  (i) it is a corporation duly incorporated and validly existing
         in good standing  under the laws of the State of __________  and it has
         full corporate power, authority and legal right to carry on its present
         business and  operations,  to own or lease its  Properties and to enter
         into and to carry out the transactions  contemplated by this Agreement,
         the  Tax  Indemnity  Agreement,  the  Trust  Agreement  and  the  other
         Operative Agreements to which it is party;

                  (ii) the  execution,  delivery and  performance  by it of this
         Agreement, the Tax Indemnity Agreement, and the Trust Agreement and the
         other  Operative  Agreements  to  which  it is  party  have  been  duly
         authorized by all necessary  corporate action on its part and, assuming
         the accuracy of the Lessee's representations in Section 6.01(n) hereof,
         do not require any governmental  approvals that would be required to be
         obtained by the Owner Participant;

                  (iii) based on the  representations,  warranties and covenants
         contained  in  Sections   6.01(l)(viii),   6.02  and  7.09  hereof  and
         compliance with Section 10.06 of the Indenture,  neither the execution,
         delivery  or  performance  by the Owner  Participant  of the  Operative
         Agreements  to which it is  party,  nor  compliance  with the terms and
         provisions  hereof  or  thereof,  conflicts  or will  conflict  with or
         results or will  result in a breach or  violation  of any of the terms,
         conditions  or  provisions  of, or will require any consent or approval
         under any law,  governmental rule or regulation applicable to the Owner
         Participant  or the  charter  documents,  as  amended,  or  bylaws,  as
         amended,  of the Owner  Participant or any order,  writ,  injunction or
         decree  of any  court  or  governmental  authority  against  the  Owner
         Participant  or by  which it or any of its  Properties  is bound or any
         indenture,  mortgage or contract or other  agreement or  instrument  to
         which  the  Owner  Participant  is a party or by which it or any of its
         Properties  is  bound,  or  constitutes  or will  constitute  a default
         thereunder or results or will result in the imposition of any Lien upon
         any of its Properties;

                  (iv) the  Operative  Agreements to which it is party have been
         or on the Certificate  Closing Date will be duly executed and delivered
         by the Owner  Participant and constitute or on the Certificate  Closing
         Date will  constitute  the legal,  valid and binding  obligation of the
         Owner Participant enforceable against it in accordance with their terms
         except as such enforceability may be limited by bankruptcy, insolvency,
         or other similar laws or general equitable principles;

                  (v) it is not in default  under any  mortgage,  deed of trust,
         indenture,  lease or other  instrument  or agreement to which the Owner
         Participant  is a party or by which it or any of its  Properties may be
         bound,  or in  violation  of  any  applicable  law,  which  default  or
         violation  would  have a  material  adverse  effect  on  the  financial
         condition,  business  or  operations  of the  Owner  Participant  or an
         adverse  effect on the ability of the Owner  Participant to perform its
         obligations under this Agreement and the other Operative  Agreements to
         which it is or is to be a party;

                  (vi) there are no pending  or, to the  knowledge  of the Owner
         Participant,  threatened actions, suits,  investigations or proceedings
         against the Owner Participant before any court,  administrative  agency
         or tribunal  which are  expected  to  materially  adversely  affect the
         ability of the Owner  Participant to perform its obligations under this
         Agreement and the other Operative Agreements to which it is or is to be
         a party and the Owner  Participant  knows of no pending  or  threatened
         actions  or  proceedings  before any  court,  administrative  agency or
         tribunal involving it in connection with the transactions  contemplated
         by the Operative Agreements;

                  (vii)  neither  the  execution  and  delivery  by it  of  this
         Agreement or the other Operative  Agreements to which it is a party nor
         the performance of its obligations hereunder or thereunder requires the
         consent or  approval  of or the  giving of notice to, the  registration
         with, or the taking of any other action in respect of, any governmental
         authority  or agency  that would be required to be obtained or taken by
         the  Owner  Participant   except  for  filings   contemplated  by  this
         Agreement;

                  (viii)  no part of the funds to be used by it to  acquire  the
         interests to be acquired by the Owner  Participant under this Agreement
         constitutes  assets  (within  the  meaning of ERISA and any  applicable
         rules and  regulations) of any employee benefit plan subject to Title I
         of  ERISA or any  applicable  regulation  thereunder  or of any plan or
         individual retirement account subject to Section 4975 of the Code; and

                  (ix) it is a "U.S.  Person" as defined in Section  7701(a)(30)
         of the Code and is not a tax resident of another country.

                  Notwithstanding  the foregoing or anything  else  contained in
         this  Agreement,  the  Owner  Participant  makes no  representation  or
         warranty in this Agreement  with respect to laws,  rules or regulations
         relating to aviation or to the nature or use of the equipment  owned by
         the Owner Trustee,  including,  without limitation,  the airworthiness,
         value,   condition,    workmanship,   design,   patent   or   trademark
         infringement,  operation,  merchantability  or  fitness  for use of the
         Aircraft,  other than such laws,  rules or regulations  relating to the
         citizenship  requirements  of the Owner  Participant  under  applicable
         aviation law.

         (b) Lessor's Liens. The Owner Participant further represents,  warrants
and  covenants  that  there  are no  Lessor's  Liens  attributable  to it (or an
Affiliate  thereof) and that there will not be any Lessor's Lien attributable to
it (or an  Affiliate  thereof)  on  the  Certificate  Closing  Date.  The  Owner
Participant  agrees with and for the benefit of the Lessee,  the Owner  Trustee,
the Indenture  Trustee and the Pass-Through  Trustee that the Owner  Participant
will, at its own cost and expense,  take such action as may be necessary to duly
discharge  and satisfy in full,  promptly  after the same first becomes known to
the  Owner   Participant,   any  Lessor's   Lien   attributable   to  the  Owner
Participant(or  an  Affiliate  thereof),   provided,  however,  that  the  Owner
Participant  shall not be required to discharge or satisfy  such  Lessor's  Lien
which  is  being  contested  by the  Owner  Participant  in  good  faith  and by
appropriate  proceedings so long as such proceedings do not involve any material
risk of the sale,  forfeiture or loss of the Aircraft or the Lessor's  Estate or
the  Trust  Indenture  Estate  or any  interest  in  any  thereof  or  otherwise
materially  adversely  affect  the  validity  or  priority  of the  Lien  of the
Indenture.

         (c) Reimbursement. Without limiting any other rights the parties hereto
may have as a result of any breach by the Owner  Participant of its  obligations
in Section ____(b) hereof,  the Owner Participant agrees to reimburse each other
party hereto for all  reasonable  legal fees and expenses of counsel that may be
incurred by any such party as a result of the  failure of the Owner  Participant
to discharge and satisfy any such Lessor's Lien in accordance  with the terms of
Section ____(b) hereof.

         (d) Assignment of Interests of Owner Participant. At any time after the
Delivery Date and subject to Section  _____(f) and the  conditions  set forth in
this Section  ____(d),  the Owner  Participant  may assign,  convey or otherwise
transfer to a single institutional  investor or an Affiliate of an institutional
investor all (but not less than all) of the Beneficial  Interest,  provided that
it gives the Lessee and the  Indenture  Trustee at least 10 days' notice of such
assignment, conveyance or other transfer and provided that the Owner Participant
and any Owner  Participant  Guarantor shall remain liable for all obligations of
the Owner Participant under the Trust Agreement and the Operative  Agreements to
which the Owner  Participant  is a party to the extent  (but only to the extent)
relating to the period on or before the date of such  transfer and provided that
the transferee agrees by a written instrument substantially in the form attached
hereto  as  Exhibit  F-1 to assume  liability  for all  obligations  as an Owner
Participant  under the Trust  Agreement  and the other  Operative  Agreements to
which such Owner Participant is a party relating to the period after the date of
transfer.  Any such  transferee  shall (a) be (i) a bank,  savings  institution,
finance company, leasing company or trust company,  national banking association
acting for its own account or in a fiduciary  capacity as trustee or agent under
any pension,  retirement,  profit  sharing or similar  trust or fund,  insurance
company,  fraternal  benefit  society or corporation  acting for its own account
having a combined capital and surplus (or, if applicable, consolidated net worth
or its equivalent) of not less than $50,000,000, (ii) a subsidiary of any Person
described  in  clause  (i)  where  such  Person  provides  (A)  support  for the
obligations assumed by such transferee subsidiary reasonably satisfactory to the
Lessee,  the Owner  Trustee and the  Indenture  Trustee or (B) an  unconditional
guaranty  substantially  in the form of  Exhibit  F-2  attached  hereto  of such
transferee subsidiary's  obligations,  or (iii) an Affiliate of the transferring
Owner Participant,  so long as such Affiliate has a combined capital and surplus
(or, if applicable,  consolidated  net worth or its equivalent) of not less than
$50,000,000,  (b) be legally capable of binding itself to the obligations of the
Owner  Participant  and shall  expressly  agree to assume all obligations of the
Owner  Participant  under the Trust Agreement and this Agreement and (c) provide
representations,  warranties,  and  covenants  substantially  similar  to  those
contained  in  Sections  7.02(a),  7.03(a) and 7.03(f)  hereof;  provided  that,
without  the prior  written  consent of the  Lessee  (unless an Event of Default
described in ss. 14(a),  (b), (f), (g), (h), or (i) of the Lease is continuing),
such transferee shall not be an airline or other aircraft operator or competitor
of the Lessee or an Affiliate of any thereof;  and provided further that neither
such transferee nor any Affiliate thereof shall (x) be a party to any litigation
or  arbitration  (whether  as  plaintiff  or  defendant)  with the Lessee or any
Affiliate of the Lessee or (y) be attempting a hostile takeover of the Lessee or
any Affiliate of the Lessee. In the event of any such assignment,  conveyance or
transfer,  the transferee  shall become a party to the Trust Agreement and shall
agree to be bound by all the terms of and will undertake all of the  obligations
of the  Owner  Participant  contained  in the  Trust  Agreement  and  the  other
Operative  Agreements  in the manner set forth in the form  attached  as Exhibit
F-1. A transferee  hereunder shall be (i) a "U.S.  Person" as defined in Section
7701(a)(30) of the Code (or any successor provision thereto) and such transferee
shall be  personally  liable for any debt service to the extent that its receipt
of rentals is reduced by reason of any  withholding  Taxes that result from such
transferee's failure to be such a "U.S. Person" and (ii) a Citizen of the United
States or has  established  a voting trust,  voting powers or other  arrangement
reasonably  satisfactory to the Indenture  Trustee,  the Owner Trustee,  and the
Lessee to permit the Owner  Trustee to be the  registered  owner of the Aircraft
under the  Transportation  Code.  A  transferee  hereunder  shall not be, and in
acquiring  the  Beneficial  Interest  shall not use the assets  of, an  employee
benefit plan subject to Title I of ERISA or an individual  retirement account or
a plan  subject  to  Section  4975  of  the  Code.  Assuming  the  truth  of the
representations  made in Sections  6.01(l) and 7.06 hereof and  compliance  with
Section 10.06 of the Indenture, no such assignment, conveyance or transfer shall
violate any provision of law or regulation or create a relationship  which would
be in  violation  thereof.  The  Owner  Trustee  shall  not be on  notice  of or
otherwise bound by any such assignment,  conveyance or transfer unless and until
it shall  have  received  an  executed  counterpart  of the  instrument  of such
assignment,  conveyance  or  transfer.  Upon any such  disposition  by the Owner
Participant to a transferee as above  provided,  the transferee  shall be deemed
the  "Owner  Participant"  or  "Trustor"  for  all  purposes  of  the  Operative
Agreements, and shall be deemed to have made all the payments previously made by
its transferor and to have acquired the same interest in the Lessor's  Estate as
theretofore  held by its  transferor;  and each reference  therein to the "Owner
Participant"  or  "Trustor"  shall  thereafter  be  deemed a  reference  to such
transferee.  No assignment,  conveyance or transfer by the Owner  Participant of
the Beneficial Interest shall increase the amount of the liability of the Lessee
under Article 8 hereof or under the Tax Indemnity  Agreement  over the amount of
liability  the Lessee would have  incurred had such  assignment,  conveyance  or
transfer not  occurred.  Notwithstanding  the other  provisions  of this Section
___(d),  the right of the Owner  Participant  to assign,  convey or transfer the
Beneficial  Interest  shall be  subject  to the right of the Lessee to match any
bona fide offer (other than by an Affiliate of the Owner Participant to purchase
the Beneficial  Interest).  The Lessee agrees that it will reasonably  cooperate
with the Owner Participant in effecting an assignment of the Owner Participant's
interests  including,  without  limitation,  providing  letters to any successor
Owner  Participant  permitting such successor  Owner  Participant to rely on any
opinions  provided by the Lessee on the  Delivery  Date.  The Owner  Participant
shall pay all costs  (including the Lessee's  costs) in connection with any such
assignment,  conveyance  or transfer  (other than an  assignment,  conveyance or
transfer  which occurs  pursuant to the exercise of remedies under Section 15 of
the Lease while an Event of Default is continuing).

         (e) Actions with Respect to Lessor's Estate, Etc. The Owner Participant
agrees  that it will not take any action to subject the  Lessor's  Estate or the
trust established by the Trust Agreement,  as debtor,  to the  reorganization or
liquidation provisions of the Bankruptcy Code or any other applicable bankruptcy
or insolvency statute.

         (f) ERISA. The Owner Participant agrees and covenants that it will take
no action with respect to its  participation  in the  transactions  contemplated
hereby  and  by  the  other   Operative   Agreements   which  would  cause  such
participation to be a "Prohibited Transaction" within the meaning of Section 406
of ERISA or Section 4975 of the Code or any  applicable  regulations  under such
sections.

         (g) Citizenship.  The Owner Participant agrees,  solely for the benefit
of the Lessee,  the Pass-Through  Trustee,  the Indenture  Trustee and the Owner
Trustee,  that if at any time on or after the Delivery Date when the Aircraft is
registered or the Lessee  proposes to register the Aircraft in the United States
(i) either the Owner  Participant  shall cease to be, or an event which has been
publicly disclosed has occurred of which the Owner Participant has knowledge and
which will cause the Owner  Participant  to cease to be, a Citizen of the United
States,  and (ii) the Aircraft shall or would  therefore  become  ineligible for
registration in the name of the Owner Trustee under the Transportation  Code and
regulations  then  applicable  thereunder  (such  eligibility  to be  determined
without regard to any provision of law that permits the U.S. registration of the
Aircraft by restricting  where it is based or used),  then the Owner Participant
shall give notice  thereof to the Lessee,  the Owner  Trustee and the  Indenture
Trustee  and  shall  (at  its own  expense  and  without  any  reimbursement  or
indemnification  from the Lessee)  promptly  effect (x) effect a voting trust or
other similar  arrangement,  (y) transfer in  accordance  with the terms of this
Agreement and the Trust  Agreement all its rights,  title and interest in and to
such Trust  Agreement,  the Lessor's Estate and this Agreement,  or (z) take any
other alternative action that would prevent any  deregistration,  or maintain or
permit the United  States  registration,  of the  Aircraft  (determined  without
regard  to any  provision  of law  that  permits  the U.S.  registration  of the
Aircraft by restricting  where it is based or used). It is agreed that the Owner
Participant  shall be liable to pay promptly on request (A) to each of the other
parties hereto any actual damages (but not  consequential  damages)  suffered by
any such other party to the extent the same shall result from the representation
and warranty of the Owner  Participant in the first sentence of Section  7.02(a)
hereof proving to be untrue as of the Delivery Date; and (B) to the Lessee,  the
Indenture Trustee and the Pass-Through Trustee for any damages actually (but not
consequentially)   incurred  by  the  Lessee,  the  Indenture  Trustee  and  the
Pass-Through  Trustee as a result of the Owner  Participant's  failure to comply
with its  obligations  pursuant to the first  sentence of this Section  7.02(c);
provided, that, the foregoing shall not restrict the Pass-Through Trustee or the
Indenture  Trustee  from  asserting  against the Owner  Participant  any damages
actually  incurred by the holders of any Pass-Through  Certificates.  Each party
hereto  agrees,  upon  the  request  and  at  the  sole  expense  of  the  Owner
Participant,  to cooperate  with the Owner  Participant  in  complying  with its
obligations  under the provisions of the first sentence of this Section 7.02(c),
but  without any  obligation  on the part of such other party to take any action
believed  by it in good  faith to be  unreasonably  burdensome  to such party or
materially adverse to its business interests.



<PAGE>


Certain of the  Lessor's  rights  under this Lease and in the  Aircraft  covered
hereby have been  assigned  to, and are subject to a security  interest in favor
of, The First  National  Bank of Maryland,  as Indenture  Trustee  under a Trust
Indenture and Security Agreement.  This Lease has been executed in counterparts;
see ss. 23(e) for  information  concerning  the rights of holders of the various
counterparts.


===================================================================================================================



                                 LEASE AGREEMENT
                     (Atlantic Coast Airlines Trust No. ___)


                                         dated as of                 , 199_


                                     between




                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION,
                            as Owner Trustee, Lessor


                                       and

                            ATLANTIC COAST AIRLINES,
                                     Lessee





                One Canadair Regional Jet Series 200 ER Aircraft


===================================================================================================================




<PAGE>


iii
EX10_50D.DOC 0108996.01

                                TABLE OF CONTENTS

                                                                                                               Page


1. Definitions; Usage.............................................................................................1

(a) Definitions...................................................................................................1
(b) Usage.........................................................................................................1

2. Agreement to Lease Aircraft; Delivery..........................................................................1

(a) Agreement to Lease............................................................................................1
(b) Delivery......................................................................................................1

3. Term and Rent; Voluntary Termination; Renewal..................................................................1

(a) Term..........................................................................................................1
(b) Basic Rent....................................................................................................1
(c) Supplemental Rent.............................................................................................1
(d) Adjustments to Basic Rent, EBO, SLV, and TV After the Delivery Date...........................................2
(e) Minimum Rent..................................................................................................2
(f) Payment.......................................................................................................3
(g) Voluntary Termination.........................................................................................3
(h) Renewal Option................................................................................................5
(i) Termination with Respect to Engines...........................................................................5

4. Net Lease......................................................................................................5


5. Return of Aircraft.............................................................................................6


6. Lessor Disclaimer..............................................................................................6


7. Ownership by Lessor............................................................................................7


8. Liens..........................................................................................................7


   9. Registration; Maintenance; Records; Compliance and Use; Replacement Parts; Improvements; Pooling of Parts;
Insignia..........................................................................................................7

(a) Registration..................................................................................................7
(b) Maintenance; Records..........................................................................................7
(c) Compliance and Use............................................................................................8
(d) Replacement of Parts..........................................................................................8
(e) Improvements..................................................................................................9
(f) Pooling of Parts.............................................................................................10
(g) Insignia.....................................................................................................10

10. Inspection...................................................................................................10


11. Loss or Destruction; Requisition of Use......................................................................11

(a) Event of Loss to the Airframe................................................................................11
(b) Event of Loss to an Engine...................................................................................13
(c) Risk of Loss; No Release of Obligations......................................................................13
(d) Requisition of Use...........................................................................................13
(e) Application of Proceeds for Events of Loss...................................................................14
(f) Payments During Default......................................................................................14

12. Insurance....................................................................................................15

(a) Liability Insurance..........................................................................................15
(b) Casualty Insurance...........................................................................................15
(c) Endorsements.................................................................................................15
(d) Reports, etc.................................................................................................16
(e) Other Insurance..............................................................................................16
(f) Indemnification by United States Government..................................................................16

13. Subleasing; Possession.......................................................................................16

(a) Subleasing, Pooling, etc.....................................................................................16
(b) Security Assignment of Subleases.............................................................................18
(c) Lessor Waiver................................................................................................18

14. Events of Default............................................................................................19


15. Remedies.....................................................................................................20

(a) Generally....................................................................................................20
(b) Expenses.....................................................................................................21
(c) Lessee Waiver................................................................................................21
(d) Remedies Cumulative..........................................................................................21

16. Purchase Options.............................................................................................21

(a) Options......................................................................................................21
(b) Purchase.....................................................................................................22

17. Notices......................................................................................................22


18. Successors, Assigns, and Indemnified Parties.................................................................23


19. Lessor's Right to Perform for Lessee.........................................................................23


20. Further Assurances...........................................................................................23


21. Successor Trustee and Rights of Trustee as Lessor............................................................23


22. Capacity of Lessor...........................................................................................24


23. Amendments and Miscellaneous.................................................................................24

(a) Amendments...................................................................................................24
(b) Survival of Agreements.......................................................................................24
(c) Severability.................................................................................................24
(d) Entire Agreement.............................................................................................24
(e) Counterparts.................................................................................................24
(f) Governing Law................................................................................................24
(g) Headings.....................................................................................................24

24. Performance by Sublessee.....................................................................................25


25. Quiet Enjoyment..............................................................................................25


26. Security For Lessor's Obligations............................................................................25


27. Submission to Jurisdiction; Venue............................................................................25



Schedule I        -        Definitions

Exhibit A         -        Lease Supplement
Exhibit B         -        Financial Terms
Exhibit C         -        Stipulated Loss Values
Exhibit D         -        Termination Values
Exhibit E         -        Lists of Countries
Exhibit F         -        Return Conditions


<PAGE>


                                                         25


                                 LEASE AGREEMENT
                     (Atlantic Coast Airlines Trust No. ___)


         This Lease Agreement (Atlantic Coast Airlines Trust No. ___) is entered
into as of  ___________,  199_  by  State  Street  Bank  and  Trust  Company  of
Connecticut,  National Association,  a national banking association,  not in its
individual  capacity,  except as expressly set forth herein, but solely as owner
trustee under the Trust  Agreement as defined in ss. 1(a) of this Agreement (the
"Lessor"), and Atlantic Coast Airlines, a California corporation (the "Lessee").

 .        1.       Definitions; Usage

 . Unless the context otherwise requires, the capitalized terms herein shall have
the  meanings  given in  Schedule I hereto,  for all  purposes of this Lease and
shall be equally  applicable  to both the singular and plural forms of the terms
defined.

 . Unless the context otherwise  requires,  any agreement or instrument  referred to herein, or the term "Agreement"
or "Lease",  means such agreement or instrument as from time to time  supplemented and amended.  "Including"  means
"including  but not  limited  to".  "Or"  means one or more,  or all,  of the  alternatives  listed  or  described.
"Herein", "hereof",  "hereunder",  etc. mean in, of, under, etc. this Agreement (and not merely in, of, under, etc.
the section or provision  where the reference  appears).  References to sections,  exhibits,  and the like refer to
those in or attached to this Agreement unless otherwise specified.

 .        2.       Agreement to Lease Aircraft; Delivery

 .  Subject  to  satisfaction  or  waiver  of the  conditions  set  forth  in the
Participation  Agreement, on the Delivery Date the Lessor hereby agrees to lease
the Aircraft to the Lessee hereunder,  and the Lessee hereby agrees to lease the
Aircraft from the Lessor hereunder,  such lease to be evidenced by the execution
by the Lessor and the Lessee of a Lease Supplement.

 . The Lessor hereby  authorizes one or more persons  designated by the Lessee as
the  authorized  representative  or  representatives  of the  Lessor  to  accept
delivery of the Aircraft.  By executing and delivering  Lease  Supplement No. 1,
Lessee  confirms to Lessor  that  Lessee has, on behalf of the Lessor,  duly and
irrevocably accepted delivery of the Aircraft from the Seller in accordance with
Lessee's normal practices under the Purchase  Agreement for all purposes of this
Agreement.

 .        3.       Term and Rent; Voluntary Termination; Renewal

 . The basic term of this Lease (the "Basic Term") shall commence on the Delivery
Date and end on the Expiration Date unless this Lease is terminated  earlier, or
cancelled, in accordance with its terms.

 . The Lessee  shall pay to the  Lessor,  as Basic Rent for the  Aircraft on each
Rent Payment Date during the Basic Term, an amount for that Rent Payment Date as
set forth in Exhibit B and  allocated to the Payment  Period ending on such Rent
Payment Date, if designated as a payment in arrears, or allocated to the Payment
Period  commencing  on such Rent Payment  Date,  if  designated  as a payment in
advance,  in each case as specified in Exhibit B, as such amount may be adjusted
pursuant to ss. 3(d) hereof.

 . The Lessee shall pay or cause to be paid to the Lessor,  or to whomever  shall
be  entitled  to it, any and all  Supplemental  Rent  promptly as the same shall
become  due.  The  Lessee  will also pay to  Lessor,  on  demand,  to the extent
permitted by applicable law,  interest  (computed on the basis of a 360-day year
of twelve  30-day  months)  at the Past Due Rate on any  payment  of Rent to the
extent  not paid  when due,  for any  period  during  which it is  overdue.  The
expiration  or other  termination  of the Lessee's  obligation to pay Basic Rent
shall not limit or modify the Lessee's obligations to pay Supplemental Rent.

 . If (1) prior to the first Rent Payment Date, the aggregate of all  Transaction
Costs  shall be other  than as shown on  Exhibit B  (unless,  if such  aggregate
exceeds  the  amount  shown on  Exhibit  B, the  Lessee  elects  (with the Owner
Participant's  consent)  to pay such  excess  directly,  in which case the Owner
Participant  shall  identify  those  transaction  costs payable  directly by the
Lessee) or (2) a Refinancing of the  Certificates is effected in accordance with
ss.  15 of  the  Participation  Agreement,  then  the  amounts  of  Basic  Rent,
Stipulated Loss Value,  and Termination  Value,  the EBO Price and the EBO Date,
shall be  appropriately  adjusted upwards or downwards by such amount or amounts
as will (aa) cause the Owner's  Economic  Return through the EBO Date as well as
the end of the Basic Term to be at least  equal to the Owner's  Economic  Return
computed using the same assumptions  (other than the changed  assumptions giving
rise to the  adjustment in question),  constraints  (including tax and appraisal
constraints,  taking  into  account the law (with  respect to Code ss. 467,  any
proposed regulation issued thereunder or administrative  interpretation thereof)
applicable at the time of adjustment),  and  methodology  originally used by the
Owner Participant in computing Basic Rent,  Stipulated Loss Values,  Termination
Values,  and the EBO Price, and (bb) to the extent consistent with the preceding
clause (aa),  minimize the Net Present Value of Rents to the Lessee.  Stipulated
Loss  Values,  Termination  Values,  and the EBO Price also shall be adjusted to
reflect any loss,  recapture,  or  unavailability  of Assumed Tax  Benefits  (as
defined in the Tax Indemnity Agreement).

         Any such adjustment of Basic Rent, EBO Price, EBO Date, Stipulated Loss
Values,  or  Termination  Values shall be  determined in good faith by the Owner
Participant,  subject to verification on a confidential  basis by the Lessee and
Babcock & Brown,  Inc., or such other financial advisor chosen by the Lessee and
shall be effective as soon as possible.  Such  adjustment  shall be evidenced by
the  execution  and delivery by the Lessor and the Lessee of a lease  amendment,
but failure to execute and deliver such an amendment  shall not prevent or delay
the  effectiveness  of the adjustment  required by the preceding  paragraph.  If
requested by the Lessee,  any  computation  of the amount  payable by the Lessee
under this ss. 3(d) shall be provided by the Owner  Participant to the Lessee in
a notice setting forth in reasonable detail the computations and methods used in
computing such amount (not including confidential  methodology and assumptions).
Within 30 days  following  the Lessee's  receipt of such notice,  the Lessee may
request that a "Big 6" (or successor)  accounting firm or nationally  recognized
lease   advisory  firm  selected  by  the  Owner   Participant   and  reasonably
satisfactory  to  the  Lessee  (the  "Verifying   Firm"),   verify  whether  the
calculations  submitted  by the  Owner  Participant  are  based  on the  correct
assumptions and are mathematically  correct. The Verifying Firm shall enter into
a confidentiality  agreement reasonably  acceptable to the Owner Participant and
shall  be  requested  to make  its  determination  within  30  days.  The  Owner
Participant shall provide to the Verifying Firm, on a confidential basis, within
three days of its  appointment,  all the  information  within the  possession or
control of the Owner  Participant and reasonably  necessary for the verification
of  the  Owner  Participant's   calculation   (including  any  and  all  related
confidential  methodology  and  assumptions);  provided that the Verifying  Firm
shall  not  release  such  confidential  methodology  or  assumptions  or  other
confidential  information  except  as  and  to  the  extent  permitted  in  such
confidentiality   agreement.   If  the  Verifying  Firm   determines  that  such
computations  are  inaccurate  or  based  on  incorrect  assumptions,  then  the
Verifying  Firm  shall   determine  what  it  believes  to  be  the  appropriate
computations.  The Verifying  Firm shall make  available  for  inspection by the
Lessee and the Lessor such Verifying Firm's working papers and shall discuss the
verification   with  the  Lessor.   In  the  absence  of  manifest  error,  such
verification  shall be final and  binding on the parties  hereto.  The costs and
expenses of such  verification  shall be paid by the Lessee unless, as result of
such verification,  the Owner Participant's computation of the Net Present Value
of Rents or the EBO  Price is  adjusted  by more  than  $10,000  in favor of the
Lessee (in which case the Owner  Participant shall pay such costs and expenses).
The Lessor and the Lessee  shall  execute and deliver an amendment to this Lease
to reflect each such adjustment under this ss. 3(d).

 .  Notwithstanding  any other  provisions  of the  Operative  Agreements  to the
contrary,  both before and after giving effect to any adjustment  referred to in
this ss. 3, under any  circumstances and in any event, (1) Stipulated Loss Value
and Termination  Value,  and the EBO Price,  on any date,  shall be an amount at
least  sufficient  to pay in full on that date the  aggregate  unpaid  principal
amount  of the  Certificates  then  scheduled  to be  outstanding,  as  adjusted
pursuant  to ss. 15 of the  Participation  Agreement,  and  accrued  and  unpaid
interest  (assuming  interest has been timely paid) and any  Make-Whole  Premium
thereon,  and (2) Basic Rent  payable on any Rent  Payment  Date shall  (without
giving  effect  to  any  acceleration  of the  Certificates  as a  result  of an
Indenture Event of Default) at least equal the aggregate amount of principal and
interest  scheduled  to be paid on the  Certificates  outstanding  on such  Rent
Payment Date, as adjusted pursuant to ss. 15 of the Participation Agreement.

 . All payments of Rent hereunder  shall be made in immediately  available  funds
and in U.S.  dollars no later than 12:00 noon,  New York City time,  on the date
payable hereunder. So long as any Certificate is outstanding, all Rent due or to
become  due  hereunder  (other  than  Excepted  Payments)  shall  be paid to the
Indenture  Trustee  in  accordance  with the  payment  instruction  set forth in
Schedule  II to the  Participation  Agreement  or at such  other  address in the
United States or to such other Person as the  Indenture  Trustee shall direct by
written  notice to the Lessee.  All Excepted  Payments  and, upon payment of all
outstanding Certificates,  all payments of Rent thereafter made hereunder, shall
be paid to the  Lessor  or,  in the case of any  payment  of  Supplemental  Rent
expressly  payable to a Person  other than  Lessor,  to such  other  Person,  as
appropriate,  in accordance with the payment  instructions set forth in Schedule
II to the  Participation  Agreement or at such other  address or to such further
Person as the Lessor or such other Person shall direct by written  notice to the
Lessee,  except that all indemnity payments under any Operative  Agreement shall
be paid to the  appropriate  Indemnitee at its payment  address set forth in the
Participation  Agreement or as otherwise  directed by such Indemnitee by written
notice to the  Lessee.  If any date on which any Rent  becomes  payable is not a
Business Day, then the applicable payment of Rent shall be made on the following
Business Day without  additional  interest or penalty  (provided that payment is
made on such following Business Day).

 . So long as no Specified  Default  shall have occurred and be  continuing,  the
Lessee shall have the right at its option (not  exercisable  more than twice) to
terminate  this  Lease,  on any Rent  Payment  Date  occurring  after  the fifth
anniversary of the Delivery Date (a "Termination  Date"),  on at least 120 days'
prior written notice given by the Lessee to the Lessor, provided that the Lessor
has received a  certificate  from the  president or chairman of the board of the
Lessee  certifying  that the  Aircraft  is  obsolete,  surplus  to the  Lessee's
business,  or to be disposed of as part of a program of jet fleet  renewal  that
has been  implemented for valid business  reasons and not with a  discriminatory
purpose of terminating only the Aircraft and aircraft under Related Leases. That
notice shall  specify the Payment Date on which the Lessee  intends to terminate
this Lease in accordance  with this ss. 3(g). The Lessee shall have the right to
revoke its notice of termination  (but not more than twice) not less than 5 days
prior to the Termination Date so specified.

         Until the 60th day before the proposed Termination Date, the Lessor may
notify the Lessee that the Lessor  elects to take  possession of the Aircraft on
the Termination  Date instead of receiving any payment of Termination  Value. In
that event,  the Lessee shall have no  obligation  to obtain bids under this ss.
3(g).

         Commencing  on the date the Lessee gives such notice,  the Lessee (or a
Person  authorized  by  the  Lessee,  acting  as  agent  for  the  Lessor  for a
commercially reasonable commission) shall use commercially reasonable efforts to
obtain the  highest bid for the cash  purchase of the  Aircraft on or before the
Termination  Date. The Lessee shall have no liability to the Lessor or any other
Person for failure to obtain the best price for the  Aircraft,  shall act in its
sole  discretion,  and shall be under no duty to solicit bids publicly or in any
particular  market.  The  Manufacturer  or  an  Affiliate  thereof,   the  Owner
Participant, and any Person contacted by the Lessor or the Owner Participant may
submit a bid. The Lessee  shall  certify to the Lessor in writing the amount and
terms of each bid submitted to the Lessee, and the name and address of the party
or parties  submitting  such bid.  Neither the Lessee nor any  Affiliate  of the
Lessee may (directly or through any agreement  with any other Person  concerning
the  purchase or use of the  Aircraft by the Lessee) bid for or buy the Aircraft
under this ss. 3(g).

         If the Lessor  exercises its option to take  possession of the Aircraft
as provided  above,  then,  provided  the Lessee does not  exercise its right to
revoke its notice of termination,  on the Termination Date, (x) the Lessor shall
pay the then-unpaid  principal amount of all Certificates then outstanding,  and
all interest thereon; and (y) the Lessee shall pay any Make-Whole Premium on the
Certificates,  and shall  deliver  the  Aircraft to or at the  direction  of the
Lessor in the same manner and  condition as if delivery  were made to the Lessor
pursuant  to ss. 5 and shall pay to the  Lessor  (A) any  unpaid  Basic  Rent in
respect of Rent Payment Dates occurring  before the  Termination  Date (less, if
the  Termination  Date is not a Rent Payment Date, the pro rata portion of Basic
Rent payable in advance in respect of the period  commencing on the  Termination
Date and  ending on the next Rent  Payment  Date),  plus (B)  either  (i) if the
Termination  Date is a Rent Payment Date,  that portion of Basic Rent payable in
arrears on such Rent Payment Date, or (ii) if the Termination Date is not a Rent
Payment Date,  that pro rata portion of Basic Rent payable in arrears due on the
following  Rent  Payment  Date in respect of the period  commencing  on the Rent
Payment  Date  immediately  preceding  the  Termination  Date and  ending on the
Termination  Date,  plus (C) any unpaid  Supplemental  Rent due on or before the
Termination Date, whereupon the Term shall terminate as of the Termination Date,
and the Lessee's  obligation to pay all installments of Basic Rent due after the
Termination  Date shall  terminate.  If the Lessor elects to retain the Aircraft
pursuant to this ss. 3(g), the Lessee shall deliver the Airframe and the Engines
(provided  that  the  Airframe  may  be  delivered  with  engines   meeting  the
requirements set forth herein for Replacement  Engines in lieu of the Engines so
long as the  aggregate  number of Engines and engines being  delivered  with the
Airframe  equals two) to the Lessor in the same manner as if delivery  were made
to the Lessor  pursuant to ss. 5 hereof,  and shall duly  transfer to the Lessor
right,  title and interest to any such  engines not owned by the Lessor,  all in
accordance  with ss. 5. Upon  delivery of the Airframe and Engines or engines to
the Lessor and payment by the Lessee of any  amounts  required to be paid by the
Lessee  pursuant  to this ss.  3(g),  the Lessor  will  transfer  to the Lessee,
without recourse or warranty  (except as to the absence of Lessor's Liens),  all
of the  Lessor's  right,  title and  interest in and to any  Engines  which were
replaced by engines  pursuant to this ss. 3(g),  and shall deliver to the Lessee
such  instrument as the Lessor shall have  received from the Indenture  Trustee,
releasing such Engines from the Lien of the Indenture.

         If the Lessor does not  exercise its option to take  possession  of the
Aircraft,  then, on the Termination Date, the Lessor shall sell the Aircraft for
immediately  available funds to the purchaser named in the highest bid certified
to it by the Lessee,  "as is, where is" and without recourse or warranty (except
as to the absence of  Lessor's  Liens) and subject to the payment of all amounts
due under this ss.  3(g).  The total sales price  realized at such sale shall be
retained by the Lessor or its assignee  and, in addition,  on or before the date
of such sale,  the Lessee shall pay to the Lessor the sum of (1) the amount,  if
any, by which (aa) the Termination Value (including any Make-Whole  Premium with
respect to the Certificates),  computed as of the Termination Date, exceeds (bb)
the  sales  price  of the  Aircraft  sold  by the  Lessor  less  all  reasonable
out-of-pocket  expenses  incurred  by the  Lessor and the Owner  Participant  in
connection  with such sale and any sales  taxes or similar  transfer  taxes (and
without  deducting any sales  commissions  or marketing  expenses for brokers or
agents  engaged by the Lessor  unless  engaged by the Lessee or a  Sublessee  on
behalf of, and with the consent of, the  Lessor),  (2) any unpaid Basic Rent due
before the Termination Date (less, if the Termination Date is not a Rent Payment
Date,  the pro rata  portion of Basic Rent  payable in advance in respect of the
period  commencing on the  Termination  Date and ending on the next Rent Payment
Date),  plus (3) either (i) if the Termination Date is a Rent Payment Date, that
portion of Basic Rent payable in arrears on such Rent Payment  Date,  or (ii) if
the  Termination  Date is not a Rent Payment Date, the pro rata portion of Basic
Rent payable in arrears due on the following Rent Payment Date in respect of the
period commencing on the Rent Payment Date immediately preceding the Termination
Date and ending on the Termination  Date, plus (4) unpaid  Supplemental Rent due
on or before the Termination Date.  Except as provided in the next paragraph,  a
sale of the  Aircraft  pursuant  to this ss.  3(g)  shall  take  place only on a
Termination Date.

         If the  Lessee  revokes  its  notice of intent to  terminate  (any such
notice of  revocation  to be effective  only if given at least 5 days before the
Termination  Date), or if no sale occurs or the Lessor  retention fails to occur
on or before the  Termination  Date, (x) the Lessee shall  reimburse the Lessor,
the Owner  Participant,  and the Indenture Trustee for any reasonable costs that
such Person incurs in  connection  with the proposed  termination,  and (y) this
Lease shall  continue in full force and  effect,  and the Lessee  shall have the
right to reinstate the termination  procedure  described in this ss. 3(g). If no
sale has occurred on the  Termination  Date because the proposed buyer failed to
purchase on that date,  a sale to that buyer may be  consummated  within 30 days
thereafter,  and the Lessee  shall be liable for Basic Rent  during  that period
equal to the daily  equivalent  (per day) of the  average  Basic Rent during the
Basic Term. Neither the Lessor nor the Owner Participant shall be under any duty
to solicit  bids,  to inquire into the efforts of the Lessee to obtain bids,  or
otherwise to take action in connection  with any sale pursuant to this ss. 3(g),
other than the Lessor's duty to transfer to the  purchaser  named in the highest
bid certified by the Lessee to the Lessor,  "as is, where is",  without recourse
or warranty,  express or implied  (except as to the absence of Lessor's  Liens),
all right,  title,  and interest in and to the Aircraft  against  receipt of the
payment  provided  in  this  ss.  3(g).  Effective  on full  payment  of all the
foregoing  amounts in  connection  with the sale or retention of the Aircraft by
the Lessor  under this ss.  3(g),  the Term shall  terminate,  and the  Lessee's
obligation  to pay all  installments  of Basic Rent due after such  payment date
shall  terminate,  whereupon  the  Lessee  shall  deliver  the  Aircraft  to the
purchaser or (in the case of a Lessor retention) to the Lessor.

 . Subject to the conditions set forth below in this ss. 3(h), the Lessee, at its
option,  may renew this Lease for one or more successive  one-year renewal terms
(each a "Renewal Term") not to exceed six years in the aggregate, with each such
Renewal Term to commence upon the expiration of the Basic Term or  then-expiring
Renewal  Term,  as the case may be. This renewal  right shall be exercised  upon
irrevocable  written  notice  from the  Lessee  to the  Lessor  of the  Lessee's
election  so to renew this Lease  given not less than 180 days before the end of
the Basic Term or any Renewal  Term.  If the Lessee fails to exercise any option
to extend the term of this Lease for any  Renewal  Term in  accordance  with the
provisions  of this  paragraph,  all of the  Lessee's  rights to extend the term
hereof for such Renewal Term and any subsequent Renewal Term shall expire.

         All  provisions  of this Lease shall apply  during each  Renewal  Term,
except that (1) the Lessee shall pay to the Lessor for each  semi-annual  period
during the Renewal Term, on the applicable Rent Payment Date during that Renewal
Term,  an amount equal to (i) with respect to the first two such Renewal  Terms,
the lower of (x) $66,000 per month ($396,000 for such semi-annual period and (y)
the Fair Market  Rental of the Aircraft for such period and (ii) with respect to
each other such Renewal  Term,  the Fair Market  Rental of the Aircraft for such
period  (provided  that, if prior to the  commencement of the third such Renewal
Period  the  Lessee  provides  to the  Lessor  a  "20-20"  appraisal  reasonably
acceptable to the Lessor,  the holder of fixed rate renewals  shall be increased
to the number  supported  by such  appraisal;  provided  further  that the total
number of renewal  periods  shall not exceed six in total),  and (2)  Stipulated
Loss Value and Termination  Value for the Aircraft shall be equal to such Values
as of the last day of the Basic Term.

         The Lessee's  right to renew this Lease pursuant to this ss. 3(h) shall
be subject to the following conditions:  (i) no Specified Default shall exist on
the date of the Lessee's  notice of renewal or the date of  commencement  of the
Renewal Term; and (ii) the Lessee shall have caused to be delivered to the Owner
Participant a residual value  agreement which is either (a) a renewal of the RVG
or (b) a residual value agreement that is substantially  identical to the RVG or
otherwise  fully  acceptable to the Owner  Participant  from or guaranteed by an
institution rated "A" or better by S&P or Moody's,  and which (as to clauses (a)
and (b)) is in an amount which protects the Owner's  Economic Return through the
end of the applicable  Renewal Term and providing  residual value  protection as
provided in Exhibit B hereto.

 . On any date  selected  by the Lessee,  the Lessee  shall have the right at its
option at any time during the Term, if no Specified  Default exists, on at least
five Business Days' prior written notice to the Lessor,  to terminate this Lease
with respect to any Engine by replacing such Engine,  effective the  termination
date, by complying with the terms of ss. 11(b) to the same extent as if an Event
of Loss had occurred to such Engine.  Such  termination  and  replacement  shall
occur  simultaneously.  Upon the Lessee's  compliance with its obligations under
the  previous  sentence,  the Lessor  will  transfer  to the Lessee (or a Person
designated  by the Lessee) the Engine so  terminated,  "as is, where is" without
recourse or warranty,  express or implied  (except as to the absence of Lessor's
Liens),  each  such  Engine  shall no  longer  be an  "Engine,"  and  each  such
Replacement Engine substituted therefor shall become an Engine. The Lessee shall
be responsible for any sales taxes or similar transfer taxes resulting from such
replacement.

 . This Lease is a net lease,  and the Lessee's  obligation  to pay all costs and
expenses  of  every   character,   whether  seen  or  unforeseen,   ordinary  or
extraordinary,  or structural  or  nonstructural,  in  connection  with the use,
operation,  maintenance,  repair and  reconstruction  of the  Airframe  and each
Engine  by the  Lessee  and the  Lessee's  obligation  to pay all  Rent  payable
hereunder,  and the rights of the Lessor in and to such Rent,  shall be absolute
and  unconditional  and  shall  not  be  subject  to any  abatement,  reduction,
suspension,  deferment,  set-off,  or recoupment  ("Abatements")  for any reason
whatsoever,  including  Abatements  due to any  present or future  claims of the
Lessee against the Lessor or any other Indemnitee under this Lease or otherwise,
or against any other Person for whatever reason.  Except as otherwise  expressly
provided  herein,  this Lease shall not terminate,  nor shall the obligations of
the Lessee be affected, by reason of (a) any defect in or damage to, or any loss
or  destruction  of, the  Aircraft  or any part  thereof,  (b) any defect in the
title, airworthiness, condition, design, merchantability,  operation, or fitness
for use of the Aircraft or any interest  therein,  (c) the interference with the
use thereof by any Person, (d) the invalidity or unenforceability or lack of due
authorization of this Lease, any other Operative Agreement, or any instrument or
document  executed  in  connection  herewith,  (e) any  insolvency,  bankruptcy,
reorganization, or similar proceeding by or against the Lessee or any Sublessee,
or (f) any other cause, whether similar or dissimilar to the foregoing,  and, to
the extent  permitted  thereby,  any present or future law or  regulation to the
contrary  notwithstanding,  it being the express intention of the Lessor and the
Lessee  that all Basic  Rent  payable  by the  Lessee  hereunder  shall be,  and
continue to be,  payable in all events  unless the  obligation to pay that Basic
Rent is terminated  pursuant to the express provisions of this Lease. If for any
reason  whatsoever  this Lease is terminated in whole or in part by operation of
law or otherwise, except as specifically provided herein, the Lessee nonetheless
agrees,  to the extent  permitted  by law, to pay to the Lessor or to the Person
entitled  thereto an amount  equal to each  Basic Rent  payment at the time such
payment  would have become due and payable in  accordance  with the terms hereof
had this Lease not been terminated in whole or in part. To the extent  permitted
by  applicable  law, the Lessee hereby waives any and all rights that it may now
have or that at any time  hereafter  may be  conferred  upon it, by  statute  or
otherwise,  to  terminate,  cancel,  quit,  or  surrender  this Lease  except in
accordance with the express terms hereof. Each payment of Basic Rent made by the
Lessee shall be final,  and the Lessee shall not seek to recover all or any part
of such  payment  for any reason  whatsoever,  except for any  payments  made in
error.  Notwithstanding  the foregoing,  the Lessee may assert any claims it may
have against any Person in an independent proceeding.

 . Unless the Aircraft is purchased pursuant to ss. 3(g) or 16, at the expiration
of the Term or upon  termination  of this Lease  pursuant to ss. 3(g) or 15, the
Lessee,  at its own risk and expense,  shall  return the Aircraft in  accordance
with Exhibit F.

 . The Lessor's  warranties  in the  Participation  Agreement  are in lieu of all
other  warranties  of the Lessor with  respect to the  Aircraft,  and the Lessor
shall not be deemed to have  modified in any respect  the  Lessee's  obligations
pursuant to ss. 4, which  obligations  are  absolute and  unconditional.  LESSOR
LEASES AND LESSEE TAKES THE AIRCRAFT "AS-IS,  WHERE-IS." LESSEE ACKNOWLEDGES AND
AGREES THAT AS BETWEEN LESSEE AND EACH OF LESSOR,  THE INDENTURE TRUSTEE AND THE
OWNER PARTICIPANT (i) LESSEE HAS SELECTED THE AIRCRAFT AND MANUFACTURER THEREOF,
(ii) THE AIRFRAME AND ENGINES ARE OF A DESIGN, CAPACITY AND MANUFACTURE SELECTED
BY AND  ACCEPTABLE  TO LESSEE,  (iii) LESSEE IS SATISFIED  THAT THE AIRFRAME AND
EACH ENGINE ARE SUITABLE FOR THEIR RESPECTIVE  PURPOSES AND (iv) NONE OF LESSOR,
THE INDENTURE  TRUSTEE,  OR THE OWNER  PARTICIPANT  MAKES,  HAS MADE OR SHALL BE
DEEMED TO HAVE MADE, AND EACH WILL BE DEEMED TO HAVE EXPRESSLY  DISCLAIMED,  ANY
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AS TO:

         (v) THE AIRWORTHINESS, VALUE, CONDITION, DESIGN, OPERATION, ANY IMPLIED
         WARRANTY OF  MERCHANTABILITY  OR FITNESS FOR USE OR FOR ANY  PARTICULAR
         PURPOSE OF THE AIRFRAME, ANY ENGINE OR ANY PART THEREOF;

         (w)      THE QUALITY OF THE MATERIAL OR WORKMANSHIP  WITH RESPECT TO THE AIRFRAME,  ANY ENGINE OR ANY PART
         THEREOF;

         (x)      THE  ABSENCE  OF LATENT OR ANY OTHER  DEFECT IN THE  AIRFRAME,  ANY  ENGINEOR  ANY PART  THEREOF,
         WHETHER OR NOT DISCOVERABLE;

         (y)      THE ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK OR COPYRIGHT OR THE LIKE; OR

         (z) THE ABSENCE OF  OBLIGATIONS  BASED ON STRICT  LIABILITY IN TORT, OR
         ANY OTHER  REPRESENTATION OR WARRANTY  WHATSOEVER,  EXPRESS OR IMPLIED,
         WITH RESPECT TO THE AIRFRAME, ANY ENGINE OR ANY PART THEREOF.

LESSEE FURTHER WAIVES, DISCLAIMS,  RELEASES AND RENOUNCES ANY LIABILITY,  RIGHT,
CLAIM,  REMEDY OR OBLIGATION WHETHER OR NOT ARISING FROM THE NEGLIGENCE (WHETHER
ACTIVE,  PASSIVE OR  IMPUTED)  OF  LESSOR,  THE  INDENTURE  TRUSTEE OR THE OWNER
PARTICIPANT, ARISING OUT OF OR ATTRIBUTABLE TO THE USE, OPERATION OR PERFORMANCE
OF THE AIRFRAME, ANY ENGINEOR ANY PART.

 . The  Aircraft  is and shall at all times  remain the  property  of the Lessor,
except as otherwise expressly provided in the Operative Agreements.

 . The Lessee shall not directly or indirectly create,  incur,  assume, or suffer
to exist any Lien on or with respect to the Lessor's Estate or this Lease or the
Aircraft,  the  Airframe  or any  Engine  or any  Part or title  thereto  or any
interest therein except:  (a) the rights of the Lessor,  the Owner  Participant,
the  Indenture  Trustee,  the  Holders,  and the Lessee as  contemplated  by the
Operative Agreements,  (b) the rights of others under agreements or arrangements
to the  extent  permitted  by ss.  9(f) and ss.  13,  (c)  Lessor's  Liens,  (d)
Indenture  Trustee's  Liens,  (e) Liens for  Taxes  either  not yet due or being
contested in good faith with due diligence  and by  appropriate  proceedings  so
long as there is no material risk of sale,  forfeiture,  loss, or loss of use of
any Item and so long as such contest does not extend beyond the end of the Term,
(f) inchoate materialmen's,  mechanics',  worker's,  repairer's,  employees', or
other like Liens arising in the ordinary  course of business and for amounts the
payment of which either is not yet due or is being  contested in good faith with
due diligence  and by  appropriate  proceedings  so long as there is no material
risk of sale, forfeiture,  loss, or loss of use of the Aircraft, the Airframe or
any Engine or any  interest  therein and so long as such contest does not extend
beyond the end of the Term,  (g) any Lien  arising out of any  judgment or award
with  respect to which at the time an appeal or  proceeding  for review is being
prosecuted in good faith by  appropriate  proceedings  diligently  conducted and
with respect to which there shall have been secured a stay of execution  pending
such appeal or  proceeding  for review and so long as such appeal or  proceeding
does not extend  beyond the end of the Term,  and (h) any Lien against which the
Lessee  causes to be  provided  a bond in such  amount  and under such terms and
conditions  as are  reasonably  satisfactory  to the  Lessor.  The  Lessee  will
promptly,  at its own  expense,  take or cause to be taken such action as may be
necessary to discharge any Lien which is not permitted by this ss. 8.

         9.       Registration;   Maintenance;  Records;  Compliance  and  Use;  Replacement  Parts;  Improvements;
 .ooling of Parts; Insignia

 . The Lessee shall, at its expense, cause the Aircraft to be duly registered, at
all  times  (except  as  provided  below  and  except  to the  extent  that such
registration  is prevented by the legal  status,  or an act or omission,  of the
Lessor,  the Owner Participant,  the Indenture Trustee,  or any Holder) from and
after the Delivery  Date,  in the United  States in the Lessor's name (except as
otherwise  required by the Transportation  Code) under the Transportation  Code,
shall not (except as provided below) register the Aircraft under the laws of any
jurisdiction  other than the United States,  and shall not cause the Aircraft to
be  ineligible  for  such  registration;  provided,  that  the  Lessee  may,  in
connection with any Sublease,  and in accordance with and subject to ss. 6.03(b)
of the  Participation  Agreement,  cause the Aircraft to be registered under the
laws of a foreign jurisdiction.

 . The  Lessee  shall  cause  each Item to be  maintained,  inspected,  serviced,
repaired,  overhauled, and tested (1) in accordance with an FAA-approved program
or (if the Aircraft has been re-registered in accordance with ss. 6.03(b) of the
Participation  Agreement)  a program of another  governmental  authority  having
jurisdiction (but in any event in accordance with maintenance standards at least
comparable  to  those   required  by  the  FAA  or  JAA  ("Minimum   Maintenance
Standards")),  (2) so as to keep each Item in as good operating  condition as it
was in when  delivered to the Lessee by the  Manufacturer,  reasonable  wear and
tear  excepted,  and so as to  enable  the  airworthiness  certificate  for  the
Aircraft to remain in good standing at all times, except when the FAA or (if the
Aircraft  has  been   re-registered  in  accordance  with  ss.  6.03(b)  of  the
Participation  Agreement) other applicable  aeronautical  authority  grounds all
Canadair  Regional Jet, 200 ER Series Aircraft,  (3) in the same manner and with
the same care as used by the Lessee (or a Permitted  Sublessee)  with respect to
similar aircraft and engines owned or leased and operated by the Lessee (or such
Permitted Sublessee), and (4) so as to comply with the applicable regulations of
the FAA or (if the  Aircraft  has  been  re-registered  in  accordance  with ss.
6.03(b) of the  Participation  Agreement)  other  governmental  authority having
jurisdiction   (but  in  any  event  in  accordance  with  Minimum   Maintenance
Standards),  except during a good-faith contest of the validity,  applicability,
or alleged  violation of the  pertinent  rule or  regulation  in any  reasonable
manner that does not involve any material  risk of sale,  forfeiture  or loss of
the  Aircraft or any Engine or the  interests  of the  Indenture  Trustee or the
Owner Participant  therein, and that does not involve any material risk of civil
liability  or any risk of  criminal  liability  against  Lessor,  the  Indenture
Trustee or the Owner Participant and which does not extend beyond the end of the
Term if the pendency of such contest would adversely  affect the Aircraft or the
remarketing  thereof in any material  respect;  provided,  that no contest shall
excuse the failure to maintain the airworthiness  certification for the Aircraft
in good standing without the Lessor's written consent, nor shall the pendency of
any contest  prevent a prohibition  of use from  becoming an Event of Loss.  The
Lessee shall maintain all logs,  manuals,  certificates,  data, and  inspection,
modification,  repair,  and overhaul  records  required by the FAA (or any other
governmental body having  jurisdiction) to be maintained in respect of each Item
(collectively,  the  "Manuals  and  Technical  Records"),  and such  Manuals and
Technical  Records shall be maintained in English (or be translated into English
on an  ongoing  basis) to the  extent  that they  would need to be in English in
order to place  the  Aircraft  on an  FAA-approved  maintenance  program.  Those
Manuals and Technical  Records which are specific to the Aircraft (but not those
Manuals and Technical  Records which are applicable to Canadair Regional Jet 200
ER series  aircraft in general)  shall, as between the Lessor and the Lessee and
all parties claiming through the Lessee, be the property of the Lessor but shall
become the  property of the Lessee upon  purchase by the Lessee of the  Aircraft
pursuant to the terms of this Lease or upon the  occurrence  of an Event of Loss
and the Lessee's compliance with ss. 11(a)(1).  The Lessee shall prepare for the
Lessor, and file, any reports required by any governmental authority as a result
of the Lessor's  ownership of the Aircraft  (and the Lessor shall furnish to the
Lessee and any Permitted  Sublessee all  reasonable  co-operation  in connection
therewith, at the Lessee's expense).

 . The Lessee shall not cause or permit the Aircraft to be maintained,  operated,
or used in violation of any law or any rule,  regulation,  treaty,  statute,  or
order of any government or governmental  authority  having  jurisdiction,  or in
violation of any airworthiness certificate, license, or registration relating to
the Aircraft issued by any such authority, except during a good-faith contest of
the validity, application, or alleged violation thereof in any reasonable manner
that does not  involve  any  material  risk of sale,  forfeiture  or loss of the
Aircraft or any Engine or the  interests of the  Indenture  Trustee or the Owner
Participant  therein  (excluding  any  interests  indemnified  for under the Tax
Indemnity  Agreement)  and that  does not  involve  any  material  risk of civil
liability or any risk of criminal  liability  against the Lessor,  the Indenture
Trustee,  or the Owner Participant,  and which does not extend beyond the end of
the Term if the pendency of such contest would adversely  affect the Aircraft or
the  remarketing  thereof  in any  material  respect.  If any  such  law,  rule,
regulation,  treaty,  statute,  order,  certificate,  license,  or  registration
requires  alteration  of the  Aircraft,  the  Lessee  shall  obtain  conformance
therewith  at no  expense  to the  Lessor  and shall  cause the  Aircraft  to be
maintained  in  proper  operating  condition  thereunder.  The  Lessee  and  any
Sublessee  shall have the right to  operate  the  Aircraft  or any Engine in any
geographical  area;  provided  that neither the Lessee nor any  Sublessee  shall
operate the  Aircraft or any Engine in any area  excluded  from  coverage by any
insurance  policy  required  by the terms of ss.  12,  unless the Lessee or such
Sublessee has obtained,  prior to such  operation in such area,  indemnification
from the Government,  or other  insurance,  against the risks and in the amounts
required by ss. 12 covering  such area or unless the  Aircraft or Engine is only
temporarily  located  in  such  area  as a  result  of  an  isolated  occurrence
attributable to a hijacking, medical emergency,  equipment malfunction,  weather
conditions, navigational error or other similar unforeseen circumstances and the
Lessee or Sublessee is using good faith efforts to remove the Aircraft or Engine
from such area.  Throughout the Term, as between the Lessee and the Lessor,  the
possession,  use,  and  maintenance  of the  Aircraft  shall  be at the risk and
expense of the Lessee. The Aircraft may not be operated, used, or located in any
declared  war zone or in any area  which  is an area of  recognized  hostilities
(except to leave such a zone or area).

 . Except as otherwise  provided in ss. 11(e),  the Lessee shall, at its own cost
and  expense,  promptly  replace all Parts (other than  Removable  Improvements)
which become worn out, lost, stolen,  destroyed,  seized,  confiscated,  damaged
beyond repair,  or permanently  rendered unfit for use for any reason whatsoever
(such substituted parts being "Replacement Parts"). In addition, in the ordinary
course of maintenance, overhaul, or testing, the Lessee may, at its own cost and
expense,  remove any Parts,  whether or not worn out, lost,  stolen,  destroyed,
seized,  confiscated,  damaged beyond repair, or permanently  rendered unfit for
use,  provided that such Parts (other than Removable  Improvements) are promptly
replaced.  All Replacement  Parts (other than Removable  Improvements)  shall be
free and clear of all Liens  (except  for  pooling  arrangements  to the  extent
permitted  by ss.  9(f) and  other  Permitted  Liens)  and  shall be in good and
operable  condition  and capable of performing  their  intended  purpose  within
manufacturer's specifications. All Parts at any time removed from any Item shall
remain the property of the Lessor, no matter where located, until they have been
replaced  by  Replacement  Parts which have been  incorporated  in such Item and
which meet the requirements for Replacement  Parts specified above.  Immediately
upon  the   incorporation   of  any  Replacement   Part  (other  than  Removable
Improvements) in such Item as above provided,  without further act, (1) title to
the removed  Part shall vest in the Lessee,  free and clear of all rights of the
Lessor, and such replaced Part shall no longer be a "Part" hereunder,  (2) title
to such  Replacement  Part shall vest in the Lessor,  subject  only to a pooling
arrangement to the extent  permitted by ss. 9(f), and (3) such  Replacement Part
shall  become  subject  to this Lease and shall be part of such Item to the same
extent as the removed Part.  Notwithstanding  the  foregoing,  the Lessee or any
Permitted  Sublessee  may remove,  and not replace,  up to $100,000 in aggregate
original cost (cumulative throughout the Term) of Parts that it reasonably deems
to be  obsolete,  the  removal  of which does not  materially  impair the value,
remaining useful life or utility of the Aircraft.

 . The Lessee shall  incorporate  in the Aircraft any  accessory,  equipment,  or
device, or make any improvement,  modification,  alteration, or addition thereto
(any such accessory, equipment, device, improvement,  modification,  alteration,
or addition being an  "Improvement"),  as is necessary from time to time to meet
the  requirements  of  the  FAA  or  any  other  governmental  authority  having
jurisdiction  over the Aircraft.  In addition,  the Lessee may from time to time
install  (or allow a Permitted  Sublessee  to install)  any  Improvement  as the
Lessee (or any Permitted Sublessee) deems desirable in the proper conduct of its
business,  provided that no such Improvement  diminishes the value,  utility, or
remaining useful life of any Item below the value, utility, and remaining useful
life that it would have had if that  Improvement had not been made. Title to all
Improvements  (other than Removable  Improvements)  shall,  without further act,
vest in the Lessor.

         Any  Improvement  that (1) is in addition to, and not in replacement of
or in  substitution  for, any Part  originally  incorporated  in any Item or any
Replacement  Part that replaced such an original Part, (2) is not required to be
incorporated  in any Item pursuant to the first  sentence of this ss. 9(e),  and
(3) can be removed  from such Item  without  impairing  the value,  utility,  or
remaining  useful  life  that  such  Item  would  have had at such time had such
Improvement  not been  made (a  "Removable  Improvement")  shall  not  become an
accession to that Item or be subject to the Lien of the Indenture.  At or before
the time that the  Aircraft is returned to the Lessor,  the Lessee may remove or
cause to be removed any  Removable  Improvement  and shall repair or cause to be
repaired any damage to the Aircraft  resulting from the  installation or removal
of such  Removable  Improvement  so as to  restore  the  Aircraft  to the value,
utility,  and remaining useful life that it would have had at such time had such
Removable  Improvement  not been made,  reasonable  wear and tear excepted.  Any
Removable  Improvement  not so removed before the time of return of the Aircraft
shall, at such time, become the property of the Lessor without further action by
the parties hereto.

         If any Removable  Improvement is owned by any third party or is subject
to a  conditional  sale  contract or other  security  interest,  then the Lessor
hereby agrees for the benefit of any such owner,  conditional vendor, or secured
party  that the  Lessor  will not  acquire  or claim,  as  against  such  owner,
conditional  vendor, or secured party, any right, title, or interest in any such
Removable  Improvement as the result of its installation on any Item;  provided,
that the Lessor's  agreement in this sentence shall be  ineffective  unless such
owner, conditional vendor, or secured party agrees in writing (a copy thereof to
be provided by the Lessee to the Lessor) and in a legally enforceable manner (a)
not to acquire or claim, as against the Lessor, any right, title, or interest in
any Item by reason of the  installation of such Removable  Improvement  thereon,
and (b) promptly,  after notice,  to remove such  Removable  Improvement  if the
Lessor declares this Lease to be in default.

 . Any Part  removed  from any Item as provided in ss. 9(d) may be subjected to a
normal pooling arrangement customary in the airline industry entered into in the
ordinary course of the Lessee's or a Permitted  Sublessee's  business,  provided
that (except for any removed Part that is a Removable Improvement) a Replacement
Part is incorporated in that Item in accordance with ss. 9(d) promptly after the
removal of the removed Part. In addition, any Replacement Part when incorporated
in an Item in  accordance  with ss. 9(d) may be owned by a Permitted Air Carrier
or a  lessor  to a  Permitted  Air  Carrier  subject  to such a  normal  pooling
arrangement,  provided  that (unless the  Replacement  Part replaces a Removable
Improvement) the Lessee,  promptly,  either (1) causes title to such Replacement
Part to vest in the  Lessor  in  accordance  with ss.  9(d) by  acquiring  title
thereto for the benefit of, and transferring  such title to, the Lessor free and
clear  of  all  Liens  (other  than  Permitted  Liens),  or  (2)  replaces  such
Replacement Part by incorporating in that Item a further  Replacement Part owned
by the Lessee free and clear of all Liens  (other than  Permitted  Liens) and by
causing  title  to such  further  Replacement  Part to  vest  in the  Lessor  in
accordance with ss. 9(d).

 .  The  Lessee  shall  (1)  cause  each  Item  to  be  kept  numbered  with  the
identification  or serial numbers  therefor as specified in the applicable Lease
Supplement,  and (2) before  locating  the  Airframe  or any Engine  outside the
United  States,  affix and  maintain in such  Airframe  adjacent to and not less
prominent than the airworthiness  certificate,  or on such Engine in a prominent
location, a nameplate or stencil bearing the following legend:

                  This [Aircraft]  [Engine] is subject to a security interest in
                  favor of The First National Bank of Maryland (as loan trustee)
                  and is leased  from  State  Street  Bank and Trust  Company of
                  Connecticut, National Association (as owner trustee).

and such other  markings as from time to time are  required by law or  otherwise
deemed necessary by the Lessor or the Indenture  Trustee in order to protect the
Lessor's title to the Aircraft,  the Lessor's  rights under this Lease,  and the
Indenture  Trustee's  rights  with  respect to the  Aircraft.  The Lessee  shall
promptly  replace any such  required  nameplate  marking which has been removed,
defaced, or destroyed.  Except as above provided,  the Lessee will not allow the
name of any  Person  to be  placed  on any  Item  as a  designation  that  might
reasonably be  interpreted  as a claim of ownership;  provided,  that nothing in
this ss.  9(g)  shall  prohibit  the Lessee (or any  Permitted  Sublessee)  from
placing appropriate  lettering,  painting,  or markings (including its customary
colors and insignia, or those of any code-sharing affiliate) on any Item.

 . At all reasonable times during the Term (but,  except when a Specified Default
is then  continuing,  and except during the last six months of the Term, no more
than once per year for the  Lessor  and the Owner  Participant  and no more than
once per year for the Indenture Trustee),  the Lessor, the Owner Participant and
the  Indenture  Trustee  (or not more  than two of their  agents  or  authorized
representatives)  may,  upon not less than five days' prior written  notice,  at
their own cost and expense, inspect the Aircraft, the Airframe or any Engine and
the Lessee's books and records  related  thereto;  provided,  that,  unless this
Lease has been  declared  to be in default in  accordance  with its terms,  such
inspection  shall be conducted  so as not to interfere  with the business of the
Lessee or the operation or maintenance by the Lessee (or a Permitted  Sublessee)
of any  aircraft  and,  as to  any  aircraft,  shall  be a  visual,  walk-around
inspection which may include going on board the aircraft,  and shall not include
opening any panels,  bays, or other apertures (but may include  inspecting those
that are open); provided further, that the costs of inspection shall be borne by
the  Lessee  (and  paid  promptly  upon  demand)  in the  case of an  inspection
conducted by such inspecting  party after the occurrence of a Specified  Default
which is then  continuing.  Promptly after the request of the Lessor,  the Owner
Participant,  or the Indenture  Trustee,  the Lessee or any Permitted  Sublessee
shall provide the Lessee's or such Permitted  Sublessee's  schedule for upcoming
heavy maintenance checks and shall use commercially reasonable efforts to permit
such inspections by the Lessor,  the Owner  Participant or the Indenture Trustee
during  such  maintenance  checks.  Upon the  request of the  Lessor,  the Owner
Participant,  or the Indenture Trustee, the Lessee shall confirm the location of
any Item and shall,  at any reasonable  time,  make any Item and all Manuals and
Technical  Records relative  thereto  available to such requesting party (or its
agents or authorized  representatives)  for inspection and copying.  The Lessor,
the Owner  Participant and the Indenture  Trustee shall have no duty to make any
such  inspection  nor shall the Lessor,  the Owner  Participant or the Indenture
Trustee  incur any  liability  or  obligation  by reason of not  making any such
inspection.  Upon the request of the  Lessor,  the Lessee  shall  provide to the
Lessor,  not more frequently than once per calendar month, a written report with
respect to the flight  hours and cycles of  operation  of the  Airframe and each
Engine  during the period  since the end of the period to which the most  recent
such report  related (or, if there has been no such previous  report,  since the
commencement  of the  Term)  through  the last day of the  calendar  month  most
recently ended prior to the date of the current report.

 .        11.      Loss or Destruction; Requisition of Use

 . If an Event of Loss occurs to the  Airframe,  the Lessee  shall within 15 days
after  such  occurrence  give to the Lessor and the  Indenture  Trustee  written
notice of such  Event of Loss  and,  within 60 days  after  such  Event of Loss,
written  notice of its election to perform one of the following two options (and
if the Lessee does not give the Lessor and the  Indenture  Trustee the notice of
such  election  within 60 days,  the Lessee  shall be deemed to have  elected to
perform the option set forth in clause (2) of this ss. 11(a)):

                  (1) If this  clause  (1) is  elected  and no Event of  Default
         shall have occurred and then be  continuing,  the Lessee shall,  within
         180 days following  such Event of Loss,  convey or cause to be conveyed
         to the Lessor,  as  replacement  for the Airframe,  good and marketable
         title to an airframe of the same make and the same or a later model and
         year of manufacture,  having at least the value, utility, and remaining
         useful  life,  and  being  in as good an  operating  condition,  as the
         Airframe  subject to such Event of Loss (assuming that the Airframe had
         been  maintained and was in the condition  required in accordance  with
         the terms of this Lease so as to enable the  airworthiness  certificate
         for the Aircraft to remain in good standing) and otherwise  meeting the
         requirements  set  forth  below (a  "Replacement  Airframe"),  good and
         marketable  title to the same  number  of  Replacement  Engines  as the
         Engines,  if any,  installed  on the  Airframe  when such Event of Loss
         occurred,  such Replacement Airframe and any such Replacement Engine(s)
         to be free and clear of all Liens (other than Permitted Liens). In such
         case,  the Lessee  shall  promptly,  at its  expense:  (aa) furnish the
         Lessor  with  bills  of  sale,   in  form  and   substance   reasonably
         satisfactory to the Lessor,  with respect to such Replacement  Airframe
         and  any  such  Replacement  Engine(s),  (bb)  cause  such  Replacement
         Airframe to be duly registered in the Lessor's name at the FAA (or such
         foreign   jurisdiction  as  is  permitted  by  ss.  9(a)),  (cc)  cause
         amendments and/or supplements  hereto and to the Indenture  (subjecting
         such Replacement  Airframe and any such Replacement Engines to the Lien
         of the Indenture), in form and substance reasonably satisfactory to the
         Lessor and the  Indenture  Trustee,  with  respect to such  Replacement
         Airframe and any such Replacement  Engine(s) to be duly executed by the
         appropriate   parties  and   recorded  at  the  FAA  (or  such  foreign
         jurisdiction),  (dd) furnish the Lessor and the Indenture  Trustee with
         evidence reasonably satisfactory to each of them of the value, utility,
         and  remaining  useful  life of,  and good title to,  such  Replacement
         Airframe and any such Replacement  Engine(s) (including an appraisal by
         a qualified independent appraiser reasonably  satisfactory to the Owner
         Participant  certifying  that such  Replacement  Airframe  has a value,
         utility and remaining  useful life at least equal to, and is in as good
         operating  condition as, the Airframe replaced,  assuming such Airframe
         was in the  condition  required by the terms of this Lease  immediately
         prior  to the  occurrence  of such  Event  of Loss  and  that  any such
         Replacement  Engine  satisfies  the  requirements  for  a  "Replacement
         Engine" as set forth in the definition thereof in Schedule I hereto, an
         opinion of counsel  addressed to the Lessor and the  Indenture  Trustee
         that such  Replacement  Airframe  and  Replacement  Engine(s)  shall be
         subject to the Lien of the Indenture,  and an opinion of counsel expert
         in FAA (or such foreign  jurisdiction) matters as to the absence of all
         Liens of record),  (ee)  furnish the Lessor and the  Indenture  Trustee
         with  evidence of compliance  with the  insurance  provisions of ss. 12
         with  respect to such  Replacement  Airframe  and any such  Replacement
         Engine(s)  as such party may  reasonably  request,  (ff)  assign to the
         Lessor  the  benefit  of all  assignable  manufacturer's  and  vendor's
         warranties  with  respect  to such  Replacement  Airframe  and any such
         Replacement Engines,  (gg) furnish the Lessor and the Indenture Trustee
         with a certificate of the Lessee  certifying  compliance  with this ss.
         11(a)(1) and to the effect that, upon consummation of such replacement,
         no Event of  Default  will  exist,  (hh)  furnish  the  Lessor  and the
         Indenture Trustee with an opinion of counsel  reasonably  acceptable to
         such party to the effect that, upon such conveyance, the Lessor's title
         to such Replacement  Airframe and any such Replacement  Engines will be
         free and  clear  of all  Liens of  record  at the FAA (or such  foreign
         jurisdiction)   and  that  such  Replacement   Airframe  and  any  such
         Replacement Engines will be leased hereunder and be subject to the Lien
         of the Indenture to the same extent as the Aircraft  replaced  thereby,
         (ii)  furnish the Lessor with all  documents,  certificates,  and other
         opinions necessary to enable the Lessor to comply with the requirements
         of ss. 9.08 of the  Indenture,  and (jj) take such other  action as the
         Lessor or the Indenture Trustee reasonably  requests in order that such
         Replacement  Airframe  and any such  Replacement  Engine(s) be properly
         titled in the  Lessor  free and clear of all  Liens  (except  Permitted
         Liens), leased hereunder, and subjected to the Lien of the Indenture to
         the same extent as the Airframe  and any  Engine(s)  replaced  thereby.
         Upon compliance by the Lessee with this ss. 11(a) (1), the Lessor shall
         transfer  to the  Lessee  or its  designee  (subject  to any  insurer's
         salvage  rights),  "as is,  where is",  without  recourse or  warranty,
         express or implied  (except as to the absence of Lessor's  Liens),  all
         right,  title,  and  interest  conveyed  to  the  Lessor  in and to the
         Airframe  and any  Engine(s)  with  respect to which such Event of Loss
         occurred,  together  with any insurance  proceeds  relating to property
         damage,  if any. In  connection  with such  transfer,  the Lessee shall
         prepare and the Lessor shall execute, all in recordable form, a bill of
         sale  evidencing  such  transfer,  a release  of the  Airframe  and any
         Engine(s)  to  which  such  Event  of Loss  occurred,  and  such  other
         documents as the Lessee reasonably  requests (all at the expense of the
         Lessee).  Any Engine not  installed on the Airframe  when such Event of
         Loss  occurred  shall  continue  to be the  property  of the Lessor and
         leased hereunder as part of the Aircraft.  Upon such replacement,  each
         such Replacement  Airframe and Replacement  Engine shall be deemed part
         of the property leased hereunder;  the Replacement Airframe shall be an
         "Airframe"  and each such  Replacement  Engine  shall be an "Engine" as
         defined  herein;  and each such  Replacement  Airframe and  Replacement
         Engine shall be deemed part of the  Aircraft.  An Event of Loss covered
         by this ss.  11(a)(1)  shall not  result in any  change in Basic  Rent,
         Stipulated Loss Value,  Termination Value,  Renewal Rent and EBO Price.
         The Lessee shall be responsible for any sales taxes or similar transfer
         taxes resulting from such replacement.

                  (2) If the  Lessee  does not  elect  (or is deemed to have not
         elected)  to  perform  clause (1) of this ss.  11(a),  or if the Lessee
         fails to perform its  obligations  under clause (1) of this ss.  11(a),
         the Lessee  shall pay or cause to be paid to the Lessor an amount equal
         to (v) the Stipulated Loss Value of the Aircraft,  determined as of the
         applicable date determined in accordance with the following sentence if
         such date is a  Stipulated  Loss  Value  Date or, if such date is not a
         Stipulated Loss Value Date,  determined as of the following  Stipulated
         Loss  Value  Date  (the  date as of  which  Stipulated  Loss  Value  is
         determined   as  provided   herein  being   referred  to  as  the  "SLV
         Determination   Date"),  plus  (w)  all  unpaid  Basic  Rent  (and,  if
         applicable, Renewal Rent) due prior to the SLV Determination Date, less
         (x) if such SLV Determination  Date is not a Rent Payment Date, the pro
         rata portion of Basic Rent (or, if  applicable,  Renewal  Rent) paid in
         advance on the most recent Rent  Payment  Date in respect of the period
         commencing  on the Loss Payment  Date (as defined  below) and ending on
         the next Rent Payment Date, plus (y) that portion of Basic Rent (or, if
         applicable,  Renewal Rent) payable in arrears on such SLV Determination
         Date,  or, if such SLV  Determination  Date is not a Rent Payment Date,
         the pro rata  portion of the Basic  Rent (or,  if  applicable,  Renewal
         Rent) payable in arrears on the following  Rent Payment Date in respect
         of the period commencing on the Rent Payment Date immediately preceding
         the SLV Determination  Date and ending on such SLV Determination  Date,
         plus (z) all other  amounts of  Supplemental  Rent due on or before the
         Loss Payment  Date and any  reasonable  expenses and costs  incurred in
         connection with such Event of Loss by the Lessor, the Owner Participant
         or the  Indenture  Trustee  (including  with  respect  to  the  related
         prepayment of the  Certificates).  Such amount shall be paid (including
         by application  of proceeds from insurance  carried under ss. 12(b)) on
         the  earlier of (x) the date within 180 days after the Event of Loss as
         designated by the Lessee, and (y) three Business Days following receipt
         of all proceeds  (or, if earlier,  proceeds in an amount at least equal
         to  Stipulated  Loss Value) of the  insurance  carried  under ss. 12(b)
         (provided,  that if the Lessee has not yet determined  whether to elect
         to perform the replacement  option  described in clause (1) of this ss.
         11(a),  then this clause (y) shall not require payment earlier than the
         Business  Day after  the  Lessee  makes (or is deemed to have  made) an
         election of clause (2) of this ss. 11(a)) (the applicable date on which
         Stipulated  Loss  Value is paid being  referred  to herein as the "Loss
         Payment Date").  Upon payment in full of such Stipulated Loss Value and
         all  such  other  amounts,  (aa)  the  Lessee's  obligation  to pay all
         succeeding  installments of Basic Rent, and the Term,  shall terminate,
         and (bb) the  Lessor  shall  transfer  to the  Lessee  or its  designee
         (subject to any insurer's  salvage  rights) "as is, where is",  without
         recourse or warranty,  express or implied  (except as to the absence of
         Lessor's Liens), all right,  title, and interest conveyed to the Lessor
         in and to the  Aircraft  (and in  connection  with such  transfer,  the
         Lessee shall  prepare and the Lessor shall  execute,  all in recordable
         form, a bill of sale  evidencing  such  transfer,  and a termination of
         this Lease,  and the Lessee  shall  prepare and the  Indenture  Trustee
         shall execute,  in recordable  form, an Indenture  release,  all at the
         Lessee's expense).  The Lessee shall be responsible for any sales taxes
         or similar transfer taxes resulting from such transfer.

 . If an Event of Loss occurs to any Engine under circumstances in which no Event
of Loss  occurs to the  Airframe,  the  Lessee  shall  notify the Lessor and the
Indenture  Trustee  thereof  within 30 days of obtaining  knowledge  thereof and
shall,  within 90 days after the date of occurrence of such Event of Loss,  duly
convey to the Lessor,  as  replacement  for such Engine,  title to a Replacement
Engine, free and clear of all Liens (other than Permitted Liens). At the time of
any such  conveyance,  the Lessee shall, at its expense:  (1) furnish the Lessor
with a bill of  sale,  in form  and  substance  reasonably  satisfactory  to the
Lessor,  for such Replacement  Engine,  (2) cause supplements  hereto and to the
Indenture  (subjecting such Replacement Engine(s) to the Lien of the Indenture),
in  form  and  substance  reasonably   satisfactory  to  the  Lessor,  for  such
Replacement  Engine to be duly executed by the appropriate  parties and recorded
at the FAA or as  appropriate  under the laws of the country of registry for the
Aircraft,  (3) execute  and, if  necessary,  file such  documents  as the Lessor
reasonably  requests to confirm the Lessor's  ownership  of, and title,  to such
Replacement  Engine,  (4) furnish the Lessor and the Indenture Trustee with such
evidence  of  compliance  with  the  insurance  provisions  of ss.  12 for  such
Replacement Engine as such party reasonably  requests,  (5) assign to the Lessor
the  benefit of all  assignable  manufacturer's  and  vendor's  warranties  with
respect  to  such  Replacement  Engine(s),  (6)  furnish  the  Lessor  with  all
documents,  certificates,  and opinions necessary to enable the Lessor to comply
with the  requirements of ss. 9.08 of the Indenture,  (7) upon request,  furnish
the  Lessor and the  Indenture  Trustee  with an  opinion of counsel  reasonably
acceptable  to each such party to the effect  that,  upon such  conveyance,  the
Lessor's title to such Replacement Engine will be free and clear of all Liens of
record at the FAA or in the country of registry  for the  Aircraft and that such
engine will be leased  hereunder  and be subject to the Lien of the Indenture to
the same extent as the Engine  replaced  thereby,  (8) furnish the Lessor with a
certificate  of the  Lessee  or any  Permitted  Sublessee  certifying  that such
Replacement  Engine has a value,  utility,  and  remaining  useful life at least
equal to, and is in as good  operating  condition as, the Engine so replaced (in
each case without  regard to the number of hours or cycles  remaining  until the
next  scheduled  maintenance  visit,  and  assuming  that such Engine was in the
condition and repair required by the terms hereof  immediately before such Event
of Loss),  (9)  furnish  the Lessor with a  certificate  of an aircraft  advisor
reasonably  satisfactory  to the Owner  Participant  (who  must be a  nationally
recognized aircraft authority) certifying that such Replacement Engine satisfies
the  requirements  for a  "Replacement  Engine"  as set forth in the  definition
thereof in Schedule I hereto,  (10) furnish the Lessor and the Indenture Trustee
with a  certificate  of the Lessee or any Permitted  Sublessee  certifying as to
compliance with this ss. 11(b), and (11) take such other action as the Lessor or
the Indenture Trustee reasonably  requests in order that such Replacement Engine
be properly  titled in the Lessor free and clear of all Liens (except  Permitted
Liens), leased hereunder, and subjected to the Lien of the Indenture to the same
extent as the Engine replaced thereby.

         Upon compliance by the Lessee with the terms of this ss. 11(b), (x) the
Lessor shall  transfer to the Lessee or its designee  (subject to any  insurer's
salvage rights),  "as is, where is",  without  recourse or warranty,  express or
implied  (except as to the absence of Lessor's  Liens),  all right,  title,  and
interest conveyed to the Lessor in and to the Engine to which such Event of Loss
occurred,  together with any insurance  proceeds relating to property damage, if
any,  and (y) the  Lessor  and the  Indenture  Trustee  shall  (at the  Lessee's
expense)  release such replaced  Engine from this Lease and the Indenture.  Each
such  Replacement  Engine  shall,  upon such  conveyance,  be deemed part of the
property leased hereunder,  shall be deemed an "Engine" and shall be deemed part
of the  Aircraft.  No  Event  of  Loss  to an  Engine  under  the  circumstances
contemplated  by the terms of this ss.  11(b) shall  result in any  reduction in
Basic  Rent.  The Lessee  shall be  responsible  for any sales  taxes or similar
transfer taxes resulting from any such replacement.

 . The  Lessee  hereby  assumes  and agrees to bear the risk of loss to each Item
and,  except as provided in ss. 11(a) and ss. 11(b),  shall not be released from
its obligations hereunder in the event of any damage to the Aircraft or any part
thereof or any Event of Loss relating thereto.

 . A  requisition  of use which  does not  constitute  an Event of Loss shall not
terminate this Lease,  and each and every  obligation of the Lessee with respect
thereto shall remain in force to the same extent as if such  requisition had not
occurred,  except to the extent that any failure or delay in the  performance of
such  obligations  (other  than any  obligations  for the  payment of money) are
prevented or delayed by such requisition of use. The Lessee shall be entitled to
all sums, attributable to the period the Item(s) involved is/are subject to this
Lease,  received by reason of any such requisition of use. All payments received
for the use of any Item  after the Term shall be paid over to, or  retained  by,
the  Lessor  in the same  manner  as Rent  under  ss.  3(f) (or paid  over to or
retained  by the Lessee if it  purchases  the  Aircraft in  accordance  with the
provisions  hereof).  The Lessee  shall  promptly  notify the Lessor of any such
requisition.

 . Any payments received at any time by the Indenture Trustee, the Lessor, or the
Lessee from any insurer  under  insurance  (other than  liability  insurance and
other than  insurance  carried by the Lessee  (or any  Permitted  Sublessee)  in
excess of the insurance  required to be maintained by the Lessee pursuant to ss.
12(b) or  insurance  maintained  by the  Lessor,  the Owner  Participant  or the
Indenture  Trustee  at  its  own  expense)  maintained  hereunder  or  from  any
governmental  authority or other Person with respect to an Event of Loss will be
applied as follows:

                  (1) if such  payments  are received as a result of an Event of
         Loss to the Airframe (and any Engine then installed  thereon),  and the
         Lessee does not make a replacement  pursuant to ss.  11(a)(1),  (aa) so
         much of such payments as shall not exceed the Stipulated Loss Value for
         the Aircraft  shall be applied in reduction of the Lessee's  obligation
         to pay such  Stipulated  Loss Value if not already paid, or, if already
         paid, shall be applied by the Lessor (or its assignee) to reimburse the
         Lessee or its designee for the payment of such  Stipulated  Loss Value,
         and (bb) the balance,  if any, of such  payments  remaining  thereafter
         shall be paid over to, or retained by, the Lessee;

                  (2) if such payments are received as the result of an Event of
         Loss  to  the  Airframe,  and  the  Lessee  has  made  or is  making  a
         replacement  thereof pursuant to ss.  11(a)(1),  such payments shall be
         paid over to, or  retained  by, the  Lessor in the same  manner as Rent
         under  ss.  3(f),  until the  Lessee  fully  performs  the terms of ss.
         11(a)(1),  after which such payments shall be paid over to, or retained
         by, the Lessee; and

                  (3) if such payments are received as the result of an Event of
         Loss to an Engine under the  circumstances  contemplated  by ss. 11(b),
         such payments  shall be paid over to, or retained by, the Lessor in the
         same manner as Rent under ss. 3(f), until the Lessee fully performs the
         terms of ss. 11(b) with respect to that Event of Loss, after which such
         payments shall be paid over to, or retained by, the Lessee.

         If (x) the Lessor and the Indenture  Trustee have received  notice from
the Lessee  pursuant to ss. 11(a) that, in connection with an Event of Loss, the
Lessee  elects to replace  the  Airframe,  or (y) an Event of Loss  occurs to an
Engine under the  circumstances  contemplated by ss. 11(b), or (z) the Lessor or
the Indenture  Trustee  receives any proceeds of insurance  maintained under ss.
12(b) pending  completion of repairs to an Item, then each of the Lessor and the
Indenture  Trustee shall use its reasonable  efforts to invest,  at the Lessee's
written request, direction, and risk, any payments that it receives with respect
to such  Item  from  any  insurer  under  insurance  required  to be  maintained
hereunder or from the Lessee or any Permitted Sublessee or from any governmental
authority or other party.  Any such  investments  shall be in obligations of the
type described in clause (a) of the definition of Permitted Investments,  except
to the extent that another  Permitted  Investment  is selected in writing by the
Lessee.  All  profits  and losses on such  investments  and any taxes in respect
thereof shall be for the account of the Lessee. In order to make the payments to
the  Lessee  provided  for in  clauses  (2) and (3) of this ss.  11(e) or in ss.
12(c),  the  Lessor  and the  Indenture  Trustee  are  authorized  to  sell  any
obligations  so purchased and shall not be required to make such payments to the
Lessee until the Lessor or the Indenture  Trustee (as the case may be) has had a
reasonable time to sell such obligations and to obtain the sale proceeds.

 . Any  amount  referred  to in this  ss.  11 or in ss.  12(b)  or (f)  which  is
otherwise  payable to the Lessee  shall not be paid to the Lessee if a Specified
Default  exists  at the time of  payment,  but  shall be paid to and held by the
Lessor as security for the Lessee's obligations  hereunder,  and at such time as
no Specified Default exists, such amount shall be paid to the Lessee.

 .        12.      Insurance

 .  The  Lessee  shall  maintain  in  effect,  at  all  times  during  the  Term,
comprehensive  aircraft and general  liability  insurance  (including  passenger
legal   liability   insurance   and   property   damage   insurance   (excluding
manufacturer's product liability insurance)) with respect to the Aircraft (1) in
amounts which are not less than the comprehensive aircraft and general liability
and property damage  insurance  applicable from time to time to similar aircraft
and engines which then comprise the Lessee's (or a  Sublessee's)  fleet on which
the  Lessee (or such  Sublessee)  carries  insurance,  but in no event less than
$200,000,000  combined single limit per  occurrence,  (2) of the types and which
cover risks of the kind  customarily  insured against by the Lessee with respect
to similar  aircraft and engines  which it  operates,  and (3)  maintained  with
independent insurers of favorably-recognized responsibility (or, as to a foreign
Sublessee,  recognized as  responsible  in the world  aviation  community).  The
insurance  required by this ss. 12(a) may be subject to  self-insurance on a per
occurrence or  fleet-wide  basis,  by way of  deductible  or premium  adjustment
provisions in insurance policies or otherwise,  in any amounts not to exceed the
greater of 5% of the net worth of ACA Inc. (based on the  most-recent  quarterly
financial statements of ACA Inc.) and $1,000,000.

         During any period that the  Aircraft is grounded  and not in  operation
for any reason,  the Lessee may modify the insurance  required by this ss. 12(a)
(i) to reduce the amounts of public  liability and property damage insurance and
(ii) to modify the scope of the risks covered and the type of insurance, in both
circumstances  to  conform to such  insurance  customary  in the  United  States
airlines industry for regional air carriers  similarly  situated with the Lessee
in respect of similar aircraft which are grounded, not in operation,  and stored
or  hangared,  except that the amounts of coverage and scope of risk covered and
the  type of  insurance  shall be the same as from  time to time  applicable  to
aircraft owned or leased by Lessee on the ground,  not in operation,  and stored
or hangared.

 . The Lessee  shall  maintain  or cause a  Permitted  Sublessee  to  maintain in
effect,  at all times  during the Term  (including  any period  during which the
Aircraft is grounded  for any  reason),  with  insurers of  favorably-recognized
responsibility (or, as to a foreign Sublessee,  recognized as responsible in the
world aviation  community),  all-risk  ground and flight aircraft hull insurance
covering  the  Airframe  and  all-risk  coverage for Engines and Parts while not
incorporated  in the  Airframe  or an  Engine,  in an  amount  which,  when paid
hereunder  for an Event of Loss to the Airframe and any  Engine(s) and engine(s)
then installed thereon,  will be not less than the Stipulated Loss Value for the
Aircraft  (computed for the following  Payment Date);  provided that neither the
Lessee nor any Permitted Sublessee shall be required to maintain all-risk flight
aircraft  hull  insurance  with  respect to any period in which the  Aircraft is
grounded  for any  reason  and  properly  stored or  hangared.  The  Lessee  may
self-insure,  by way of deductible or premium adjustment provisions in insurance
policies or otherwise,  the risks required to be insured  against under this ss.
12(b), in any amounts not to exceed the greater of (x) $1,000,000,  or (y) 5% of
the  net  worth  of ACA  Inc.  (based  on the  most-recent  quarterly  financial
statements  of ACA Inc.)  (or,  in either  case,  such  higher  amount as may be
approved by the Owner Participant). The Lessee shall maintain war risk insurance
(including  political  hijacking  and  governmental  confiscation  insurance) or
obtain  indemnification from the Government with respect to the Aircraft only if
and to the  extent  that  the  Aircraft  is  operated  in a war  zone or area of
recognized hostilities.

 . Any policies of insurance  carried in  accordance  with this ss. 12: (1) shall
include  the  Additional  Insureds  as  their  interests  appear  as  additional
insureds,  (2) with respect to insurance  carried in accordance  with ss. 12(b),
shall be payable to the  Indenture  Trustee so long as the Lien of the Indenture
shall not have  been  discharged,  and  thereafter  to the  Lessor,  and,  if no
Specified Default exists, shall be disbursed to the Lessee (or other appropriate
Person  specified by the Lessee) upon completion of repairs made to the Aircraft
so as to restore it to the  operating  condition  required  by ss. 9 or shall be
disbursed as otherwise required by this Lease; provided,  that unless the Lessor
or the  Indenture  Trustee has notified the  insurers  that a Specified  Default
exists,  insurance  proceeds not exceeding  $3,000,000 for any single occurrence
and not  involving an Event of Loss to the  Aircraft may be payable  directly to
the Lessee or any  Permitted  Sublessee,  (3) shall provide that if the insurers
cancel such  insurance  for any reason  whatever,  or any change  adverse to any
Additional  Insured is made in policy terms or  provisions,  or the insurance is
allowed  to lapse for  nonpayment  of  premium  or such  insurance  coverage  is
reduced,  such cancellation,  change, lapse, or reduction shall not be effective
as to any Additional Insured for 30 days (seven days, or such other period as is
then customary in the airline  insurance  industry,  in the case of any war risk
coverage)  after  such  Additional  Insured  receives  written  notice  of  such
cancellation, change, lapse, or reduction, (4) shall provide that, in respect of
the interest of each  Additional  Insured in such policies,  the insurance shall
not be  invalidated by any action or inaction of the Lessee,  any Sublessee,  or
any other Person  except such  Additional  Insured,  (5) shall  provide that the
insurers waive any rights of subrogation against the Additional Insureds, except
to the extent of any loss caused by the gross  negligence or willful  misconduct
of an Additional  Insured,  (6) shall provide that the Additional Insureds shall
have no obligation or liability for payment of any premiums, commissions, calls,
or assessments,  and (7) shall provide that all proceeds in excess of $3,000,000
shall be paid to the  Indenture  Trustee  so long as the  Lien of the  Indenture
shall not have been discharged, and thereafter to the Lessor, unless the insurer
has received notice that a Specified  Default exists, in which case all proceeds
shall be paid to the  Indenture  Trustee  so long as the  Lien of the  Indenture
shall not have been  discharged,  and  thereafter to the Lessor.  Each liability
policy  (x)  shall be  primary  without  right of  contribution  from any  other
insurance  which is  carried by the  Additional  Insureds,  (y) shall  expressly
provide  that all of the  provisions  thereof,  except the limits of  liability,
shall  operate in the same  manner as if there were a separate  policy  covering
each insured, and (z) shall provide that the insurers waive any right of setoff,
counterclaim,  or other deduction against the Additional Insureds. In connection
with any insurance proceeds payable to the Additional Insureds for the repair of
any Item, the Additional  Insureds shall respond as soon as possible to requests
of the Lessee to turn over such funds for the repair of such Item.  With respect
to any Item, any amount received by an Additional  Insured pursuant to insurance
carried under ss. 12 which exceeds such Item's Stipulated Loss Value on the date
such  payment  is  received  shall be  promptly  remitted  to the  Lessee or its
designee.

 . At least once each year  during  the Term,  the  Lessee  shall  furnish to the
Additional  Insureds a report signed by an independent  broker  certifying  that
policies  of  insurance  in the forms,  covering  the risks,  and in the amounts
required by this ss. 12 are in full force and effect and that, in the opinion of
such  broker,  the  insurance  then  carried  and  maintained  in respect of the
Aircraft  complies with the terms of this ss. 12, and including (i) confirmation
that the  insurance  has been  placed  with  insurers,  giving  the name of each
insurer,  the amount  for which it insures  (and any  portion  thereof  which is
subject to a deductible),  and the period of the policy,  and (ii)  confirmation
that all  premiums  due to the  insurers  have been  paid.  The  Lessee  (or any
Sublessee) shall instruct such firm to notify the Additional Insureds in writing
promptly  of any  defaults in the payment of any premium and of any other act or
omission  on the part of the  Lessee or any  Sublessee  or of any event of which
such broker has knowledge  which might  invalidate or render  unenforceable,  in
whole or in part, any insurance for the Airframe or any Engine.

 . If the Lessee fails to cause  insurance to be  maintained  as required by this
ss. 12, any Additional  Insured may, after giving  reasonable  advance notice to
the Lessee of such Additional  Insured's intent to do so, provide such insurance
and, in such event,  the Lessee shall,  upon demand,  reimburse such  Additional
Insured, as Supplemental Rent, for the cost thereof, without waiver of any other
rights such  Additional  Insured may have.  Nothing in this Lease shall prohibit
the Lessor,  the Owner  Participant  or the Indenture  Trustee from insuring the
Airframe or any Engine,  or its interest therein at its own expense in an amount
in excess of that required to be maintained hereunder, provided that such excess
insurance  in no way  increases  the  cost or  limits  the  availability  of any
insurance  required  to be  maintained  hereunder;  provided  further,  that any
insurance policies of the Lessor, the Owner Participant or the Indenture Trustee
insuring the Airframe or any Engine shall provide for a release to the Lessee of
any and all salvage rights in and to the Airframe or any Engine.

 . The  Lessor  (and the other  Additional  Insureds)  shall  accept,  in lieu of
insurance  against any risk with respect to any Item,  indemnification  from the
United States  government  against such risk in any amount which,  when added to
the amount of any insurance  against such risk  maintained by or for the benefit
of the Lessee (including permitted  deductibles and self-insurance) with respect
to any Item, shall be to the combined effect substantially the same as to amount
and risk (and in favor of the same parties) as insurance  otherwise  required by
this ss. 12.

 .        13.      Subleasing; Possession

 . The Lessee shall not, without the Lessor's prior written consent, sublease, or
sublet or otherwise relinquish  possession of the Aircraft,  the Airframe or any
Engine,  or permit any Engine to be  installed  on any  airframe  other than the
Airframe;  provided  that if no  Specified  Default  shall have  occurred and be
continuing at the time of  commencement of such sublease or subletting or at the
time of such relinquishment of possession or such installation, the Lessee (and,
except as otherwise  provided in this ss. 13(a) as to clause (6), any Sublessee)
may, without the Lessor's prior written consent:

                  (1)  subject  any  Engine to  normal  interchange  or  pooling
         arrangements  customary in the airline industry and entered into in the
         ordinary course of its business (and with any Permitted Air Carrier, in
         the case of interchange arrangements), provided that no transfer of the
         title of such Engine is required in  connection  therewith  (but if the
         Lessor's   title  to  any  such  Engine  is  divested  under  any  such
         arrangement, such divestiture shall be deemed to be an Event of Loss to
         such Engine and the Lessee  shall  comply with ss.  11(b) in respect of
         such deemed Event of Loss);

                  (2)  deliver   possession   of  any  Item  to  any   qualified
         organization  for  testing,   maintenance,  or  overhaul  work  or  for
         Improvements to the extent required or permitted by ss. 9(e);

                  (3) install any Engine on an airframe  owned by the Lessee (or
         such  Sublessee)  free and clear of all Liens,  except  (aa)  Permitted
         Liens,  (bb) Liens that do not apply to such  Engine,  (cc) the Lien of
         any  agreement  which  effectively  provides that such Engine shall not
         become subject to the Lien thereof, notwithstanding the installation of
         such  Engine on any  airframe  subject  to the Lien of such  agreement,
         unless and until the Lessee (or such  Sublessee)  becomes  the owner of
         such Engine, and (dd) those created by the rights of other air carriers
         under normal  interchange or pooling  agreements which are customary in
         the airline  industry  and do not require the transfer of title to such
         Engine;

                  (4) install any Engine on an airframe leased to the Lessee (or
         such Sublessee) or owned by the Lessee (or such Sublessee) subject to a
         conditional  sale or other security  agreement,  so long as such Engine
         does not become subject to a Lien (other than a Permitted Lien);

                  (5) install any Engine on an airframe  owned by the Lessee (or
         such Sublessee),  leased to the Lessee (or such Sublessee), or owned by
         the Lessee (or such Sublessee)  subject to a conditional  sale or other
         security  agreement  under  circumstances  where neither clause (3) nor
         clause (4) above  applies (but if the Lessor's  title to such Engine is
         divested in connection with such  installation,  such divestiture shall
         be deemed an Event of Loss to such Engine and the Lessee  shall  comply
         with ss. 11(b) in respect of such deemed Event of Loss,  the Lessor not
         intending  hereby to waive any right or  interest  it may have to or in
         such Engine under  applicable  law until  compliance by the Lessee with
         such ss. 11(b));

                  (6)      sublease any Item to any Permitted Sublessee; and

                  (7) subject any Item to (a)  contracts  with the United States
         of America or any  instrumentality  or agency  thereof,  (b) wet leases
         with third parties under which the Lessee has effective  control of the
         Aircraft in the ordinary  course of the Lessee's  business  which shall
         not be considered a transfer of possession hereunder, provided that the
         Lessee's  obligations under this Lease shall continue in full force and
         effect notwithstanding any such wet lease, or (c) the CRAF Program;

provided,  further,  that (aa) the rights of any transferee shall be effectively
subject and subordinate (and, in the case of a sublease, shall be made expressly
subject and  subordinate)  to all the terms of this Lease including the Lessor's
right to  repossession  pursuant to ss. 15 and to avoid such  sublease upon such
repossession,  (bb) the Lessee shall remain  primarily  liable hereunder for the
performance  of all the  terms  of this  Lease  to the  same  extent  as if such
transfer  had not  occurred,  (cc) any such  Sublease  shall be for a period  or
periods not to exceed the Term unless the Lessee has  notified the Lessor of its
exercise of the purchase  option  pursuant to ss. 16, and (dd) no Sublessee  may
sub-sublease any Item,  except that a Permitted  Sublessee who is an airframe or
engine  manufacturer,  or Affiliate  thereof,  may sub-sublease to any Permitted
Sublessee to whom a sublease would be permitted  under this ss. 13(a).  Any such
Sublease will require  maintenance,  use, and operation  standards in accordance
with this Lease. The Lessee shall notify the Lessor and the Indenture Trustee of
any sublease  promptly  after entering into it, and shall provide the Lessor and
the  Indenture  Trustee  with a copy  of such  Sublease.  No  relinquishment  of
possession of any Item or Part shall in any way discharge or diminish any of the
Lessee's obligations.

  As  security  for the  Lessee's  due and  punctual  payment  of all  Rent  and
performance  of all of its other  covenants  and  obligations  in the  Operative
Documents,  the Lessee hereby grants to the Lessor a security interest in all of
the  Lessee's  right,  title,  and  interest  in and to each  Sublease,  and all
payments,  including  payments of rent,  insurance  proceeds  (other than public
liability  insurance  proceeds),   and  other  amounts  due  or  to  become  due
thereunder.  The Lessee shall enter into a "Sublease Assignment" with respect to
each  Sublease of the Airframe  having a term of one year or longer.  The Lessee
hereby (1)  acknowledges  and  consents to the  Lessor's  assignment  of all the
Lessor's right,  title,  and interest in and to the Lessee's right,  title,  and
interest in and to each Sublease,  and all payments,  including rent,  insurance
proceeds (other than public liability insurance proceeds), and other amounts due
or to become due  thereunder  (excluding  Excepted  Payments),  to the Indenture
Trustee under and pursuant to the Indenture,  and (2) acknowledges  that so long
as the Lien of the Indenture has not been discharged, all the Lessor's rights in
respect of such Sublease shall be exercisable as set forth in the Indenture.  In
furtherance  of the  provisions of this  paragraph,  the Lessee agrees that each
Sublease for more than one year of the  Airframe  (x) shall  contain a provision
substantially  to the effect  that the  Sublessee  agrees to pay all amounts due
under the Sublease to the  Indenture  Trustee (or to the Owner Trustee after the
Lien of the Indenture is discharged) after the Sublessee receives written notice
from the  Indenture  Trustee  or the Owner  Trustee  to such  effect  (until the
Sublessee receives written notice from the Indenture Trustee to contrary effect)
and stating that a Specified  Default  exists under the Lease,  and (y) shall be
accompanied by such Uniform  Commercial  Code financing  statements as shall, in
the Lessor's reasonable opinion, be required to perfect and protect the security
interests of the Lessor and the Indenture Trustee in such Sublease.

 . The Lessor  hereby  agrees for the benefit of each lessor or secured  party of
any engine leased to the Lessee or owned by the Lessee  subject to a conditional
sale or other security  agreement that the Lessor shall not acquire or claim, as
against  such  lessor or secured  party,  any right,  title,  or interest in any
engine as the result of the  installation  of such engine on the Airframe at any
time while such  engine is  subject to such lease or  conditional  sale or other
security agreement and owned by such lessor or subject to a security interest in
favor of such secured party.

         (d) Civil Reserve Air Fleet Program. The other provisions of this Lease
to the  contrary  notwithstanding,  the Lessee may  transfer  possession  of the
Aircraft  or  any  Engine  to  the  United   States  of  America  or  any  other
instrumentality or agency thereof as part of the Civil Reserve Air Fleet Program
("CRAF  Program")  for a  period  not to  extend  beyond  the  end of the  Term;
provided,  that if, at any time  during the Term,  the  Aircraft  is called into
service by the  Government  pursuant to the CRAF  Program and is not returned or
released by the  Government on or before the last scheduled day of the Term, the
Term  shall  be  extended  automatically  for  up to an  additional  six  months
thereafter.  The Lessee will promptly  notify the Lessor in writing in the event
of the requisition for use of the Aircraft under CRAF Program  activation by the
Government  ("Civil  Reserve  Air  Fleet  Requisition").  All  of  the  Lessee's
obligations  under  this  Lease  will  continue  to the same  extent  as if such
requisition had not occurred.  If there is a requisition for use of the Aircraft
pursuant  to  the  CRAF  Program  or  CRAF  Program  activation,  there  may  be
substituted  for all or any part of the  insurance  required by ss. 12 insurance
provided  under 49  U.S.C.  ss.  44301 et seq.  or  Government  indemnification;
provided,  that the Lessee will remain  responsible for full compliance with all
the provisions of this Lease whether or not  Government  insurance or Government
indemnification satisfies the Lessee's obligations under this Lease. If there is
a  requisition  for use of the  Aircraft  pursuant  to the CRAF  Program or CRAF
Program activation,  there will be no limitation on the geographic area in which
the Aircraft may be operated. The Lessee hereby assigns to the Lessor all rights
to payment for the Aircraft by the  Government  under the CRAF Program to secure
all the Lessee's  obligations  to pay Rent and to perform its other  obligations
under the Operative  Agreements.  At such time as the Lessor is paid in full for
all amounts it is due and owed by the Lessee,  the  aforesaid  assignment  shall
terminate  without  further act of the parties and all such  amounts owed by the
Government  under the CRAF  Program to the Lessee but paid to the Lessor,  which
the Lessor has not  previously  applied to  compensate  itself for  amounts  due
hereunder from the Lessee, shall be paid to the Lessee.

 . Each of the following shall constitute an "Event of Default" (whether any such
event  shall  be  voluntary  or  involuntary  or come  about or be  effected  by
operation of law or pursuant to or in compliance  with any  judgment,  decree or
order of any court or any order,  rule or  regulation of any  administrative  or
governmental body) so long as it has not been remedied:

         (a) Basic  Rent.  The Lessee  fails to make any  payment of Basic Rent,
Renewal  Rent,  Stipulated  Loss  Value or  Termination  Value or a  payment  of
Supplemental  Rent  constituting any Make-Whole  Premium payable with respect to
any  Certificate  under the  terms of the  Indenture  when due and such  failure
continues for five Business Days after the due date.

         (b) Other Supplemental Rent. The Lessee fails to make any other payment
of Supplemental Rent (other than Stipulated Loss Value, Termination Value or any
Make-Whole  Premium payable with respect to any  Certificate  under the terms of
the Indenture)  when due and such failure  continues for ten Business Days after
the Lessee  receives  written  notice  thereof  (except that with respect to any
failure to pay Excepted Payments for such period,  such failure shall constitute
an Event of Default at the discretion of the Owner Participant).

         (c) Insurance.  The Lessee fails to cause insurance to be maintained in
accordance with ss. 12.

         (d)  Covenants.  The Lessee or ACA Inc. fails to perform or observe any
of the other  covenants to be performed or observed by it hereunder or under any
Operative  Agreement  and such failure  continues for at least 30 days after the
Lessee receives  written notice thereof,  unless such failure cannot be remedied
with diligent  effort during such 30-day period and the Lessee (i) determines in
good faith that such failure may be remedied with additional efforts and (ii) is
diligently  proceeding by appropriate  proceedings  to correct such failure,  in
which case such failure continues for such longer period (not exceeding 180 days
from the date of  notice)  as may be  necessary  to  remedy  such  failure  with
diligent effort of the Lessee.

         (e)  Representations.  Any  representation or warranty of the Lessee or
ACA Inc.  in any  Operative  Agreement  (excluding  those  in the Tax  Indemnity
Agreement) is incorrect in a material  respect when made,  remains material when
discovered,  and, if the effect of such  misrepresentation  is  curable,  is not
cured  within 30 days after the  Lessee's  receipt of  written  notice  from the
Lessor.

         (f)  Appointment of Receiver,  etc. The Lessee or ACA Inc.  consents to
the appointment of a receiver, trustee, or liquidator of itself or substantially
all of its property,  shall generally not pay its debts as they come due, admits
in writing its inability to pay its debts generally as they come due, or makes a
general assignment for the benefit of creditors.

         (g) Voluntary Bankruptcy. The Lessee or ACA, Inc. (1) files a voluntary
petition  in   bankruptcy  or  a  voluntary   petition  or  an  answer   seeking
reorganization, liquidation or other relief in a proceeding under any bankruptcy
laws or other  insolvency  laws,  as now or  hereafter  in effect,  or an answer
admitting  the material  allegations  of a petition  filed against the Lessee or
ACA,  Inc. in any such  proceeding,  or (2) by voluntary  petition,  answer,  or
consent,  the Lessee or ACA Inc.  seeks relief under the provisions of any other
existing  or  future   bankruptcy   or  other  similar  law  providing  for  the
reorganization  or  winding-up  of  corporations  or providing for an agreement,
composition, extension, or adjustment with its creditors.

         (h) Involuntary  Appointment.  An order, judgment, or decree is entered
in any proceeding by any court of competent jurisdiction appointing, without the
Lessee's or ACA Inc.'s consent, a receiver, trustee, or liquidator of the Lessee
or  ACA,  Inc.  or  of  substantially  all  of  its  property,  or  sequestering
substantially  all of the Lessee's or ACA, Inc.'s property,  and any such order,
judgment,  decree, or sequestration remains in force undismissed,  unstayed, and
unvacated for at least 90 days after the date of entry.

         (i) Involuntary Bankruptcy.  A petition against the Lessee or ACA, Inc.
in a proceeding  under  applicable  bankruptcy laws or other insolvency laws, as
now or hereafter in effect, is filed and is not withdrawn or dismissed within 90
days thereafter,  or, under any law providing for  reorganization or liquidation
of  corporations  which  shall  apply to the Lessee or ACA,  Inc.,  any court of
competent  jurisdiction assumes jurisdiction,  custody, or control of the Lessee
or ACA,  Inc. or of  substantially  all of its property  and such  jurisdiction,
custody, or control remains in force unrelinquished,  unstayed, and unterminated
for at least 90 days.

         (j) Air Carrier Status. The Lessee fails or ceases to be a Section 1110
Person.

         (k) ACA  Guaranty.  The ACA  Guaranty  ceases  to be in full  force and
effect, or ACA Inc.  repudiates the validity of the ACA Guaranty,  in each case,
at any time prior to the termination of such ACA Guaranty in accordance with its
terms.

 .        15.      Remedies

 . Upon the occurrence of (x) any Event of Default  specified in ss. 14(f),  (g),
(h),  or (i),  this Lease  shall be deemed to be in default  without  any act or
notice of any kind, all of which are hereby  waived,  and (y) any other Event of
Default,  so long as it continues,  the Lessor may, at its option,  declare this
Lease to be in default,  and in either case at any time  thereafter,  the Lessor
may  exercise  one or more of the  following  remedies as the Lessor in its sole
discretion shall lawfully elect:

                  (1) cancel (in the sense of UCC ss. 2A 505(1)),  terminate  or
         rescind  this  Lease or cause the  Lessee,  upon the  Lessor's  written
         demand and at the Lessee's  cost and expense,  to return  promptly (and
         the Lessee  thereupon shall return  promptly),  all or such part of the
         Aircraft  as the Lessor so  demands,  to the Lessor or its order in the
         manner and condition  required by, and otherwise in accordance with all
         the  provisions of, ss. 5 as if the Aircraft were being returned at the
         end of the Term, or if the Lessee does not so deliver such Item(s), the
         Lessor  may  enter  upon  the  premises  where  all or any  part of the
         Aircraft is located  and take  immediate  possession  of and remove the
         same  (together  with any engine  that is  installed  on the  Airframe,
         subject to the rights of any owner, lessor, lienor, or secured party of
         such engine) by summary proceedings or otherwise,  all without becoming
         liable  for or by reason  of such  entry or  taking  of  possession  or
         removal,  whether for the  restoration of damage to property  caused by
         such action or otherwise;

                  (2) with or without taking possession  thereof,  sell any Item
         at public or private sale,  free and clear of any rights of the Lessee,
         or otherwise dispose of, hold, use,  operate,  lease to others, or keep
         idle any Item as the Lessor, in its sole discretion, may determine, all
         free and clear of any rights or claims of the  Lessee or any  Sublessee
         and  without  any duty to account to the  Lessee  with  respect to such
         action or inaction or for any proceeds with respect thereto,  except as
         otherwise provided herein;

                  (3) whether or not the Lessor shall have  exercised,  or shall
         thereafter at any time exercise,  any of its rights under clause (1) or
         (2) above with respect to any Item,  the Lessor,  by written  notice to
         the Lessee specifying a payment date (the "Default Payment Date") which
         shall be the Stipulated Loss Value Date next occurring not less than 10
         days after the date of such notice,  may cause the Lessee to pay to the
         Lessor,  and the Lessee shall pay to the Lessor, on the Default Payment
         Date, as liquidated  damages for loss of a bargain and not as a penalty
         (in lieu of all Basic Rent  accruing  on or after the  Default  Payment
         Date),  any unpaid  Basic Rent due prior to the  Default  Payment  Date
         (together  with  interest  on such amount at the Past Due Rate from the
         Payment  Date as of which such Basic Rent was not paid until the actual
         date of payment of such amount) plus an amount equal to the excess,  if
         any, of (aa) the Basic Rent for the Aircraft  for the  remainder of the
         Basic  Term  or  then   effective   Renewal  Term   (disregarding   any
         cancellation  under this ss. 15) over (bb) the  aggregate  Fair  Market
         Rental of the Aircraft for such period,  after  discounting  such Basic
         Rent and Fair Market  Rental  semi-annually  to present value as of the
         Default Payment Date at the rate per annum equal to the Debt Rate;

                  (4) if the Lessor sells the Aircraft, the Lessor may elect, in
         lieu of  exercising  its rights under clause (3), to require the Lessee
         to pay to the  Lessor,  and the Lessee in such  event  shall pay to the
         Lessor,  on the date of such sale, as liquidated  damages for loss of a
         bargain and not as a penalty (in lieu of all Basic Rent accruing  after
         such sale  occurs),  any unpaid  Basic  Rent due before  such sale date
         less,  if such  sale  date is not a Rent  Payment  Date,  the pro  rata
         portion  of Basic  Rent  payable  in  advance  in respect of the period
         commencing  on the sale date and ending on the next Rent  Payment  Date
         (together  with  interest  on such amount at the Past Due Rate from the
         Payment  Date(s)  as of which  such  Basic  Rent was not paid until the
         actual  date  of  payment  of  such  amount)  plus  the  amount  of any
         deficiency  between the net  proceeds  of such sale and the  Stipulated
         Loss  Value of the  Aircraft  as of the date of such sale (or,  if such
         date is not a  Stipulated  Loss Value Date,  then the  Stipulated  Loss
         Value Date following the sale date,  which Stipulated Loss Value shall,
         if such sale date is a Rent Payment Date, include that portion of Basic
         Rent  payable in  arrears on such date,  and if such sale date is not a
         Rent Payment  Date,  include the pro rata portion of Basic Rent payable
         in  arrears  on the next Rent  Payment  Date in  respect  of the period
         commencing on the Rent Payment Date immediately preceding the sale date
         and  ending  on  such  sale  date),  together  with  interest  on  such
         Stipulated  Loss  Value at the Past Due Rate from the  Stipulated  Loss
         Value Date as of which such Stipulated  Loss Value is determined  until
         the date of actual payment of such amount;

                  (5) the Lessor  may  proceed by  appropriate  court  action or
         otherwise  to enforce  the terms  hereof or to recover  damages for the
         breach hereof, including payment of Basic Rent and Renewal Rent;

                  (6)      the Lessor may  exercise  any other  right or remedy  available  to it under  applicable
         laws; or

                  (7) the Lessor or any other  Indemnitee may enforce payment of
Supplemental Rent.

         In addition,  the Lessee shall be liable,  except as otherwise provided
above,  to the Lessor and any other  Indemnitee  for any and all unpaid Rent due
hereunder  before,  during,  and  after  the  exercise  of any of the  foregoing
remedies,  and for all  reasonable  legal  fees and  other  costs  and  expenses
incurred by reason of the  occurrence of any Event of Default or the exercise of
remedies with respect  thereto,  including any Make-Whole  Premium and including
all costs and  expenses  incurred  in  connection  with (xx) any  bankruptcy  or
insolvency proceeding,  (yy) any retaking of any Item, or the return of any Item
in  accordance  with the  terms  of ss.  5, or (zz) in  placing  any Item in the
condition and airworthiness required by ss. 5.

 . The Lessee shall be liable for all costs,  charges,  and  expenses,  including
reasonable  legal fees and  disbursements,  incurred  by the Lessor or any other
Indemnitee  by reason of the  occurrence of any Event of Default or the exercise
of remedies  with respect  thereto,  which  amounts  shall be  reimbursed  on an
After-Tax Basis.

 . To the extent  permitted by  applicable  law, the Lessee hereby waives any and
all rights that the Lessee may have under any bankruptcy, insolvency, or similar
laws, rules, or regulations to the continued  possession or use of the Aircraft,
or with respect to the payment of Rent therefor, or with respect to this Lease.

 . No remedy  referred to herein is intended to be  exclusive,  but each shall be
cumulative  and in  addition to any other  remedy  referred to in this ss. 15 or
otherwise  available  to the Lessor at law or in  equity.  No express or implied
waiver by the Lessor of any Default  shall in any way be, or be construed to be,
a waiver of any future or subsequent Default. The failure or delay of the Lessor
in exercising any rights  granted to it hereunder  shall not constitute a waiver
of any such right upon the continuation or recurrence of the underlying event or
circumstance,  and any single or partial exercise of any particular right by the
Lessor  shall not exhaust  that right or  constitute a waiver of any other right
provided herein.

 .        16.      Purchase Options

 . Provided that no Specified  Default  exists on the purchase  date,  the Lessee
shall  have the option to  purchase  the  Aircraft  (i) on the EBO Date shown on
Exhibit  B (the  "EBO  Date")  for the EBO  Price  shown on  Exhibit B (the "EBO
Price")  plus any  applicable  Make-Whole  Premium  owing  with  respect  to the
Certificates and, if such EBO Date is not a Rent Payment Date, less the pro rata
portion of Basic Rent (or Renewal  Rent,  as the case may be) payable in advance
in respect of the period  commencing on the EBO Date and ending on the next Rent
Payment Date,  and plus the pro rata portion of Basic Rent payable in arrears on
such next Rent  Payment  Date in respect of the  period  commencing  on the Rent
Payment Date immediately preceding the EBO Date and ending on such EBO Date (and
if such option is exercised,  any Basic Rent otherwise payable in advance on the
date of purchase shall not be due or payable); (ii) at the end of the Basic Term
or any Renewal Term, for the then-current Fair Market Value of the Aircraft; and
(iii) if a Materially Adverse Tax Event occurs with respect to the Aircraft, for
an amount equal to the  then-current  Fair Market Value of the Aircraft  (or, if
greater, the Termination Value thereof),  determined as of the date of purchase,
plus all accrued and unpaid  Rent with  respect to periods  prior to the date of
purchase,  less the pro rata portion of Basic Rent or Renewal  Rent, as the case
may be, paid in advance on the Rent Payment Date immediately  preceding the date
of purchase in respect of the period commencing on such purchase date and ending
on the next Rent Payment Date (including any applicable Make-Whole Premium owing
with  respect to the  Certificates),  but  excluding  any Basic Rent  payable in
advance on such payment date.

         The Lessee may elect to exercise any such purchase  option by providing
to the Lessor and the Indenture Trustee, in the case of the options described in
clauses (i) and (iii) above, not less than 30 days' prior written notice, in the
case of the option described in clause (ii) above, not less than 270 days' prior
written notice (which notice shall become  irrevocable 180 days prior to the end
of the  Basic  Term  or the  applicable  Renewal  Term,  as  applicable,  if not
previously  revoked,  and in the case of the option  described  in clause  (iii)
above,  not  less  than 90 days'  prior  written  notice.  Any  purchase  option
described in this ss. 16 may, at the  election of the Lessee,  be exercised by a
designee of the Lessee.

 . On the purchase date specified by the Lessee under ss. 16(a), the Lessee shall
purchase the Aircraft  from the Lessor and the Lessor shall sell the Aircraft to
the Lessee or its assignee or nominee,  on an "as is,  where is" basis,  without
representation  or  warranty,  express or implied  (except as to the  absence of
Lessor's Liens), for immediately available funds (U.S. dollars). Upon payment of
(1) such purchase price, and (2) all  Supplemental  Rent then due and owing, the
Lessor shall execute and deliver to the Lessee,  or to the Lessee's  assignee or
nominee,  a bill of sale,  without  representations  or  warranties,  express or
implied (except as to the absence of Lessor's Liens), for the Aircraft, together
with such other  documents as may be required to release the  Aircraft  from the
terms and scope of this  Lease and to  transfer  title  thereto to the Lessee or
such assignee or nominee, and the Indenture Trustee shall execute and deliver an
Indenture  release for the Aircraft,  all in such form as the Lessee  reasonably
requests and all at the Lessee's expense. If no purchase under this ss. 16 shall
have  occurred on the  applicable  purchase  date as the result of the  Lessee's
failure  to meet any  condition  to such  purchase  set  forth in any  Operative
Agreement,  this Lease  shall  continue in full force and effect as if no notice
had been given by the Lessee.

 . All notices or consents  under this Agreement  shall be in writing  (including
telecopies),  shall be in English,  shall be effective on delivery, and shall be
addressed as follows (or to such other address as an addressee  shall  designate
by notice to the other party):

                           (a) if to the Lessee:

                           Atlantic Coast Airlines
                           515A Shaw Road
                           Dulles, VA  20166
                           Attention:  General Counsel
                           Fax: (703) 925-6294

                           (b) if to the Lessor:

                           State Street Bank and Trust Company
                              of Connecticut, National Association
                           225 Asylum Street (Goodwin Square)
                           Hartford, CT  06103
                           Attn: Corporate Trust Department
                           Fax:  (860) 986-7920

                           (with copies to the Indenture  Trustee and to the Owner Participant at
                           its address specified in the Participation Agreement)

                           (c) if to the Indenture Trustee:

                           The First National Bank of Maryland
                           25 South Charles Street
                           Baltimore, MD  21201
                           Attn:  Corporate Trust Department
                           Fax:  (410) 244-4236

 .  This  Lease  shall  bind,  and  (subject  to  limitations  in  the  Operative
Agreements)  shall  benefit  and may be  enforced  by,  (a) the  Lessor  and its
successors  and  assigns,  and (b) the Lessee and its  successors  and  assigns.
Lessee will not, without the prior written consent of Lessor,  assign any of its
rights or obligations  hereunder or in the Aircraft except as otherwise provided
in the Operative Agreements. Lessor agrees that it will not assign or convey its
right, title and interest in or to this Lease or the Aircraft except as provided
in the Operative Agreements.

 . If the  Lessee  fails to make any  required  payment  of Rent or to perform or
comply  with  any of its  other  agreements  herein,  the  Lessor  or the  Owner
Participant may (but shall not be obligated to), after giving reasonable advance
notice to the  Lessee of the  Lessor's  intent to do so,  make such  payment  or
perform or comply with such agreement, and the amount of such payment and of the
Lessor's and the Owner Participant's  reasonable expenses incurred in connection
with such  payment or the  performance  of or  compliance  with such  agreement,
together with  interest  thereon at the Past Due Rate from (and  including)  the
date of making such payment or incurring such expenses to the date of payment by
the Lessee,  shall be Supplemental  Rent,  payable by the Lessee upon demand. No
such payment or performance by the Lessor or the Owner  Participant  shall waive
any Default or relieve the Lessee of its obligations hereunder.

 . On the Delivery  Date,  the Lessee will cause this Lease  (including the Lease
Supplement)  and the Indenture  (including the Indenture  Supplement) to be duly
filed and  recorded at the FAA. In addition,  the Lessee will  promptly and duly
execute and deliver to the Lessor such further documents and assurances and take
such further action as the Lessor from time to time reasonably requests in order
to carry out more  effectively  the  intent of this Lease and to  establish  and
protect  the rights and  remedies  created or intended to be created in favor of
the Lessor  hereunder,  including the execution and delivery of  supplements  or
amendments   hereto,  in  recordable  form,  and  the  recording  or  filing  of
counterparts   hereof  or  thereof,   in  accordance   with  the  laws  of  such
jurisdictions  the Lessor from time to time  reasonably  deems advisable and, if
requested by the Lessor,  the execution and delivery of terminations or releases
in connection with any transfer of any Item upon the termination, expiration, or
cancellation of this Lease in accordance with the terms hereof.

 . If any successor trustee for the Lessor is appointed  pursuant to the terms of
the Trust Agreement, such successor trustee shall, upon giving written notice to
the Lessee, succeed to all the rights, powers, and title of the Lessor hereunder
and shall be the Lessor and the owner of the Aircraft  for all purposes  hereof,
without  the  necessity  of any consent or approval by the Lessee and without in
any way altering the terms of this Lease or the Lessee's obligations  hereunder.
One such  appointment and  designation of a successor  trustee shall not exhaust
the right to appoint and designate  further  successor  trustees pursuant to the
Trust  Agreement,  but such right may be  exercised  repeatedly  so long as this
Lease is in effect.

 . State Street Bank and Trust Company of  Connecticut,  National  Association is
entering into this Lease solely as trustee under the Trust  Agreement and not in
its  individual  capacity,  and shall not be  personally  liable  for any of the
statements,  representations,  warranties,  agreements,  or  obligations  of the
Lessor  hereunder or for any loss with respect  thereto,  as to all of which the
Lessee  agrees to look solely to the Trust Estate;  provided,  that SSB shall be
liable  hereunder for its own gross  negligence  or willful  misconduct or for a
breach of its  representations  and warranties made in its individual  capacity,
and SSB accepts the benefits of the indemnification granted, and representations
and warranties made, to it hereunder.

 .        23.      Amendments and Miscellaneous

 . The terms of this Lease shall not be waived, modified, amended,  supplemented,
or terminated in any manner  whatsoever  except by written  instrument signed by
the Lessor and the Lessee.

 . Except as otherwise provided herein or therein,  all agreements,  indemnities,
representations,  and warranties in this Lease or the other Operative Agreements
shall  survive the  execution  and  delivery of this Lease and,  with respect to
events (or, in the case of Taxes, to periods of time) occurring during the Term,
or relating to a Default or exercise of  remedies  with  respect  thereto  which
extends beyond the Term, the expiration,  cancellation,  or other termination of
this Lease.

 . Any provision of this Lease that is or becomes  prohibited or unenforceable in
any jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such  prohibition  or  unenforceability   without   invalidating  the  remaining
provisions  hereof,  and  any  such  prohibition  or   unenforceability  in  any
jurisdiction shall not invalidate or render  unenforceable such provision in any
other  jurisdiction.  To the extent  permitted by applicable law, the Lessee and
the Lessor hereby waive any provision of law which renders any provision  hereof
prohibited or unenforceable in any respect.

 . This Lease and the other Operative  Agreements  represent the entire agreement
of the parties hereto with respect to the subject  matter hereof,  and supersede
any and all prior  understandings.  This  Lease is an  agreement  of lease,  and
nothing  herein shall be construed as conveying to the Lessee any right,  title,
or interest in or to the Aircraft, except as lessee only.

 . This Lease  Agreement may be executed in any number of  counterparts , each of
which shall be an original (except that only the counterpart bearing the receipt
executed  by the  Indenture  Trustee  shall  be the  original  for  purposes  of
perfecting  a  security  interest  therein as chattel  paper  under the  Uniform
Commercial  Code),  but all of which taken together shall constitute one and the
same  instrument and any of the parties hereto may execute this Lease  Agreement
by  signing  any such  counterpart.  To the  extent  that this  Lease  Agreement
constitutes  chattel  paper (as such term is defined in the  Uniform  Commercial
Code as in effect in any applicable jurisdiction),  no security interest in this
Lease  Agreement  may be created  through  the  transfer  or  possession  of any
counterpart other than the original  chattel-paper  counterpart,  which shall be
the counterpart  containing the receipt executed by the Indenture Trustee on its
signature page.

 . THIS LEASE IS BEING  DELIVERED IN THE STATE OF NEW YORK, AND SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK (EXCLUDING
ANY  CONFLICTS-OF-LAWS  PRINCIPLE  THAT  WOULD  APPLY  THE  LAWS  OF  ANY  OTHER
JURISDICTION).

 .  The headings in this Lease are for convenience of reference only, and are not a substantive part of this Lease.

 .        24.      Performance by Sublessee

         Performance of any or all of the Lessee's  obligations under this Lease
by any Sublessee shall, for all purposes hereof,  constitute  performance by the
Lessee of such obligations to the extent of such performance;  provided that the
Lessee shall remain  primarily  liable  hereunder for the performance of all the
terms of this Lease to the same extent as if such sublease had not occurred.

         25.      Quiet Enjoyment.

         So long as no Event of Default shall have  occurred and be  continuing,
the Lessor  covenants  that  neither it nor any other Person  lawfully  claiming
through it shall interfere with the Lessee's or any Permitted  Sublessee's right
to possess and use the Aircraft or the  Lessee's  ability to exercise its rights
and  privileges  under this Lease without  hindrance or disturbance by it or any
such other Person.

         26.      Security For Lessor's Obligations.

         (a) Security for Lessor's  Obligations  to Holders.  In order to secure
the indebtedness  evidenced by the Certificates,  the Indenture provides for the
assignment  by the  Lessor to the  Indenture  Trustee  of this Lease and for the
creation of a first  mortgage  and security  interest in favor of the  Indenture
Trustee on the Aircraft. The Lessee consents to and acknowledges such assignment
(subject to the reservations  and conditions  therein set forth) and the receipt
of a copy of the Indenture.

         (b) Consent of Lessee to  Assignment  of Lease as Security.  The Lessee
hereby  acknowledges and consents to the Indenture  Trustee's rights pursuant to
the terms of the Indenture to receive  payments  (other than Excepted  Payments)
due under this Lease,  to transfer or assign  title to the  Aircraft  subject to
this Lease,  to make (jointly with the Lessor where  provided in the  Indenture)
all  waivers  and  agreements  except as  otherwise  provided  in the  Indenture
(including ss. 8.01 thereof), to give all notices, consents, and releases and to
take all action upon the  happening of an Event of Default  (except as otherwise
specifically  provided in the Indenture,  including ss. 8.01 thereof),  or to do
any and all other things  whatsoever  which the Lessor is or may become entitled
to do under this Lease (except as otherwise provided in the Indenture, including
ss.  8.01  thereof);  all or any of which  rights,  obligations,  benefits,  and
interests  may,  pursuant  to the  terms  of the  Indenture,  be  reassigned  or
retransferred by the Indenture Trustee at any time and from time to time (except
as otherwise provided in the Indenture);  provided,  that the Lessor,  except to
the  extent,  and for such  time as,  it is  unable  to do so by  virtue  of the
Indenture,  shall remain  liable for the  performance  of all the  covenants for
which it is obligated under this Lease notwithstanding such assignment.

 .        27.      Submission to Jurisdiction; Venue

         (a) EACH PARTY HERETO HEREBY  IRREVOCABLY  AGREES,  ACCEPTS AND SUBMITS
ITSELF TO THE  NON-EXCLUSIVE  JURISDICTION OF THE COURTSOF THE STATE OF NEW YORK
IN THE COUNTY OF NEW YORK AND OF THE UNITED STATES FOR THE SOUTHERN  DISTRICT OF
NEW YORK, IN CONNECTION  WITH ANY LEGAL ACTION,  SUIT OR PROCEEDING WITH RESPECT
TO  ANY  MATTER  RELATING  TO OR  ARISING  OUT  OF OR IN  CONNECTION  WITH  THIS
AGREEMENT.

         (b)  EACH  PARTY  HERETO  HEREBY  IRREVOCABLY  WAIVES,  TO  THE  EXTENT
PERMITTED BY APPLICABLE  LAW, AND AGREES NOT TO ASSERT,  BY WAY OF MOTION,  AS A
DEFENSE,  OR OTHERWISE,  IN ANY LEGAL ACTION OR PROCEEDING  BROUGHT HEREUNDER IN
ANY OF THE ABOVE-NAMED  COURTS,  THAT SUCH ACTION OR PROCEEDING IS BROUGHT IN AN
INCONVENIENT  FORUM, THAT VENUE FOR THE ACTION OR PROCEEDING IS IMPROPER OR THAT
THIS  AGREEMENT OR ANY OTHER  OPERATIVE  AGREEMENT  MAY NOT BE ENFORCED IN OR BY
SUCH COURTS.

         (c) EACH PARTY HERETO  HEREBY  WAIVES ITS  RESPECTIVE  RIGHTS TO A JURY
TRIAL OF ANY CLAIM OR CAUSE OF ACTION  IN ANY  COURT IN ANY  JURISDICTION  BASED
UPON OR ARRISING OUT OF OR RELATING TO THIS AGREEMENT.




<PAGE>







         IN WITNESS  WHEREOF,  the Lessee  and the Lessor  have  executed  this  Lease  Agreement  (Atlantic  Coast
Airlines Trust No. ____).


                                                     ATLANTIC COAST AIRLINES, Lessee



                                                     By:

                                     Title:



                                                     By:

                                     Title:


                                                     STATE STREET BANK AND TRUST
                                                     COMPANY   OF   CONNECTICUT,
                                                     NATIONAL  ASSOCIATION  (not
                                                     in its individual  capacity
                                                     (except    as     expressly
                                                     otherwise  provided herein)
                                                     but    solely    as   owner
                                                     trustee), Lessor


                                                     By:

                                     Title:



               [This is the Original counterpart of the Lease Agreement for chattel paper purposes.]

                                      [or]

                   [This is a Duplicate executed counterpart of the Lease Agreement, and is not
                                     the original for chattel paper purposes.]




<PAGE>



                                                                                                          EXHIBIT A



                  LESSOR'S INTEREST UNDER THIS LEASE SUPPLEMENT
                        IS SUBJECT TO A SECURITY INTEREST

                             LEASE SUPPLEMENT NO. 1
                  (Atlantic Coast Airlines Trust No. ________)




                  This Lease Supplement No. 1 (Atlantic Coast Airlines Trust No.
_______),  dated ___________ __, ____, is entered into between State Street Bank
and Trust  Company of  Connecticut,  National  Association,  a national  banking
association,  not in its individual capacity,  but solely as Owner Trustee under
the Trust  Agreement  (Atlantic  Coast Airlines  Trust No.  _______) dated as of
September 1, 1997 (the  "Lessor"),  and Atlantic  Coast  Airlines,  a California
corporation (the "Lessee").

         Recitals:

         The Lessor and the Lessee have entered into a Lease Agreement (Atlantic
Coast Airlines Trust No.  ______),  dated as of __________,  199_ (the "Aircraft
Lease",  the  defined  terms in the  Aircraft  Lease  being  used in this  Lease
Supplement with the same meaning as in the Aircraft  Lease),  which provides for
the execution and delivery of a  supplement,  substantially  in the form of this
Lease  Supplement,  for the  purpose of  leasing  under the  Aircraft  Lease the
aircraft and engines  described below  ("Aircraft") as and when delivered by the
Lessor to the Lessee in accordance with the terms of the Aircraft Lease.

         The Aircraft Lease relates to the Aircraft.

         A counterpart  of the Aircraft  Lease is attached to and made a part of
this Lease Supplement, and this Lease Supplement, together with such attachment,
is being filed for recordation on this date with the FAA as one document.

         The Lessor and the Lessee agree as follows:

         1.  Delivered  Aircraft.  The Lessor hereby  delivers and leases to the
Lessee under the Lease, and the Lessee hereby accepts and leases from the Lessor
under the Lease,  the following  described  Canadair  Regional Jet, Series 200ER
Aircraft (the "Delivered Aircraft"),  which Delivered Aircraft as of the date of
this Lease Supplement consists of the following:

         (a)      Canadair  Regional Jet, Series 200ER Airframe;  U.S.  Registration  Number _____;  Manufacturer's
Serial No. ___; and

         (b) Two General Electric CF34-3B1 engines bearing manufacturer's serial
nos. _______ and ______ (each of which has 750 or more rated takeoff  horsepower
or the equivalent of such horsepower).

         2.       Delivery  Date.  The  Delivery  Date  of  the  Delivered  Aircraft  is the  date  of  this  Lease
Supplement.

         3. Lessor's Cost.  The Lessor's Cost of the Delivery  Aircraft shall be
the amount set forth in Exhibit B to the Lease.

         4. Term.  The Term for the  Delivered  Aircraft  shall  commence on the
Delivery Date, and shall terminate on ______, 201_, unless earlier terminated or
extended pursuant to the terms of the Lease.

         5.       Rent.  The  Lessee  hereby  confirms  its  obligation  to pay  Rent  for the  Delivered  Aircraft
throughout the Term thereof in accordance with the terms and provisions of the Lease.

         6.  Lessee's  Acceptance  of  Delivered  Aircraft.  The  Lessee  hereby
confirms  that the Lessee has accepted the  Delivered  Aircraft for all purposes
hereof  and of the  Lease.  Such  acceptance  by the  Lessee  shall  be  without
prejudice  to any rights of the Lessor or the Lessee  against  the  Seller,  the
Manufacturer,  the Engine  Manufacturer,  or any vendor of equipment included in
the Aircraft.

         7.  Incorporation  of Lease By  Reference.  All the  provisions  of the
Aircraft Lease are hereby  incorporated by reference in this Lease Supplement to
the same extent as if fully set forth in this Lease Supplement.

         8. Governing Law. THIS LEASE SUPPLEMENT IS BEING DELIVERED IN THE STATE
OF NEW YORK, AND SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE  WITH THE LAWS
OF THE STATE OF NEW YORK (EXCLUDING ANY  CONFLICTS-OF-LAWS  PRINCIPLE THAT WOULD
APPLY THE LAWS OF ANY OTHER JURISDICTION).

         9. Agreement as Chattel Paper. To the extent that this Lease Supplement
constitutes  chattel  paper (as  defined in the  Uniform  Commercial  Code),  no
security  interest  in  this  Lease  Supplement  may be  perfected  through  the
possession of any counterpart other than the original chattel paper counterpart,
which shall be the counterpart marked "Original" in its signature page.

         10.  Counterparts.  This Lease Supplement may be executed in any number
of  counterparts,  each of which  shall be an  original  (except  that  only the
counterpart marked "Original" shall be the original for purposes of perfecting a
security  interest therein as chattel paper under the Uniform  Commercial Code),
but all of which taken together shall constitute one and the same instrument and
any of the parties hereto may execute this Lease  Supplement by signing any such
counterpart.


<PAGE>



         IN WITNESS WHEREOF, the Lessor and the Lessee have executed this Lease Supplement No. 1.


                                                     STATE  STREET  BANK AND  TRUST  COMPANY  OF  CONNECTICUT,
                                                     NATIONAL  ASSOCIATION,  not in its  individual  capacity,
                                                     but solely as Owner Trustee (Lessor)


                                                     By:

                                     Title:


                                                     ATLANTIC COAST AIRLINES (Lessee)


                                                     By:

                                     Title:


                                                     By:

                                     Title:





<PAGE>


24

                                                                                           Draft 6  -  Sept. 29 '97
                                                                                           ------------------------

                                   SCHEDULE I

                                   DEFINITIONS
                   (ATLANTIC COAST AIRLINES TRUST NO. ______)


GENERAL PROVISIONS

The following  terms shall have the  following  meanings for all purposes of the
Operative Agreements (other than the Pass Through Agreements,  the Intercreditor
Agreement,  and the Liquidity  Facilities)  referred to below,  unless otherwise
defined  in an  Operative  Agreement  or the  context  thereof  shall  otherwise
require. In the case of any conflict between the provisions of this Schedule and
the  provisions of any Operative  Agreement,  the  provisions of such  Operative
Agreement shall control the construction of such Operative Agreement.

Unless the context  otherwise  requires,  (i) references to agreements  shall be
deemed to mean such  agreements as amended and  supplemented  from time to time,
and (ii)  references  to parties to  agreements  shall be deemed to include  the
successors and permitted assigns of such parties.

DEFINED TERMS:

         Abatements: defined in ss. 4 of the Lease.

         ACA Guaranty:  the Guaranty,  dated as of the Certificate Closing Date, issued by ACA Inc. in favor of the
Lessor, the Indenture Trustee, and the Liquidity Providers, pertaining to the Aircraft.

         ACA Inc.: Atlantic Coast Airlines, Inc., a Delaware corporation.

         Additional   Insureds:   the  Lessor  (in  its   individual  and  trust
capacities), the Owner Participant, the Indenture Trustee (in its individual and
trust capacities),  each Liquidity  Provider,  and their successors and assigns,
and the  directors,  officers,  members,  employees,  and  agents of each of the
foregoing.

         Aeronautics  Authority:  as appropriate,  the Federal Aviation  Administration and/or the Administrator of
the Federal Aviation Administration,  or any Person, governmental department,  bureau, commission or agency located
in the United States succeeding to the functions, of the foregoing.

         Affidavits: the affidavits of citizenship of the Owner Trustee and the Owner Participant.

         Affiliate:  with respect to any Person,  any other  Person  directly or
indirectly  controlling  50% or more of any class of voting  securities  of such
Person or otherwise controlling, controlled by or under common control with such
Person. For the purposes of this definition,  "control"  (including  "controlled
by" and  "under  common  control  with")  shall  mean  the  power,  directly  or
indirectly,  to direct or cause the direction of the  management and policies of
such Person whether through the ownership of voting securities or by contract or
otherwise.  In no event  shall  the  Owner  Trustee  or the  Lessor be deemed an
Affiliate of the Owner Participant.

         After-Tax  Basis:  a basis such that any  payment to be  received  by a
Person shall be supplemented by a further payment to such Person so that the sum
of the two  payments,  after  deduction  of all Taxes  (taking  into account any
related  current  credits or deductions  actually  realized)  resulting from the
receipt  or  accrual  of such  payments,  shall be equal  to the  payment  to be
received.

         Air Carrier:  any U.S. Air Carrier and any 1'foreign air carrier" (as defined in the Transportation  Code)
as to which there is in force a permit granted under ss. 41302 of the Transportation Code.

         Aircraft: the Airframe and the two Engines.

         Airframe:  the Canadair  Regional Jet Series 200ER aircraft  (excluding
the Engines or engines from time to time installed  thereon) to be leased by the
Lessor to the Lessee  pursuant to the Lease and the Lease  Supplement and having
the United States FAA registration  number initially and  manufacturer's  serial
number  specified in the Lease  Supplement,  including  (i) all Parts in respect
thereof and (ii) any Replacement  Airframe  substituted pursuant to ss. 11(a)(1)
of the Lease.

         Application:  the  application  for  registration  of the  Aircraft  with the FAA in the name of the Owner
Trustee.

         Appraisal:  the report prepared by BK Associates,  Inc. and to be delivered to the Owner Participant (with
an abbreviated report to the Lessee) on the Delivery Date pursuant to ss. 4.02(h) of the Participation Agreement.

         Appraisal  Procedure:  a procedure  whereby an  independent  appraiser,
chosen by the Lessor from the three appraisers  selected by the Lessee as herein
provided  and  reasonably  acceptable  to the Lessor,  determines  the amount in
question.  The Lessee shall, within 15 days of a request by the Lessor,  provide
the Lessor with the names of three independent  appraisers.  If any appraiser so
nominated is not reasonably  acceptable to the Lessor, the Lessor shall promptly
notify the  Lessee,  and the Lessee  shall have five  Business  Days to nominate
another  appraiser  reasonably   acceptable  to  the  Lessor.   Within  15  days
thereafter,  the Lessor shall select and employ one of such  appraisers.  If the
Lessee or the Lessor fails to make its selection in a timely  manner,  the other
party may make such  selection and proceed with the  appraisal.  The decision of
the appraiser so appointed shall be given within 10 days after being  appointed.
Such appraiser's  decision shall be binding and conclusive on the Lessor and the
Lessee.  The  Lessee  and the Lessor  shall  each pay  one-half  of the fees and
expenses of such appraiser, provided that the Lessee shall pay all such fees and
expenses in the case of any appraisal pursuant to ss. 15 of the Lease.

         Average Life Date: for any  Certificate,  the date which follows the prepayment  date by a period equal to
the Remaining Weighted Average Life of such Certificate.

         Bankruptcy Code: Title 11 of the United States Code, as amended, and any successor thereto.

         Basic Rent:  the aggregate  periodic rent payable for the Aircraft  throughout  the Basic Term pursuant to
ss. 3(b) of the Lease, adjusted pursuant to ss.ss. 3(d) and 3(e) of the Lease.

         Basic Rent Rate: set forth in Exhibit D to the Lease.

         Basic Term:  the period  commencing at the beginning of the day on the Delivery Date and ending at the end
of the day on the  Expiration  Date,  or such  earlier  date on which the Lease  shall be  terminated  as  provided
therein.

         Beneficial  Interest:  the interest of the Owner  Participant  (or the Initial Owner  Participant,  as the
case may be) under the Trust Agreement.

         Business  Day:  any day  other  than a  Saturday  or  Sunday  on  which
commercial  banks are not  authorized  or  required  to close in New  York,  NY,
Washington, D.C. and the city in the United States in which the office or agency
is  maintained  by the Pass Through  Trustee for the payment of the Pass Through
Certificates, and after the Lien of the Indenture is discharged, Hartford, CT.

         Certificate  Closing  Date:  the date of the closing with respect to the purchase of  Certificates  by the
Pass-Through Trustee contemplated by ss. 2.01(b) of the Participation Agreement.

         Certificate Holder:  see "Holder".

         Certificates:  the Equipment Trust Certificates  (Atlantic Coast Airlines Trust No. _________),  issued by
the Owner  Trustee  pursuant  to the  Indenture  and any  certificate  issued in exchange  therefor or  replacement
thereof pursuant to the Indenture.

         Citizen  of the  United  States:  a citizen of the  United  States as  defined  in  ss. 40102(a)(15)  of the
Transportation  Code, or any analogous part of any successor or  substituted  legislation or regulation at the time
in effect.

         Class A Liquidity Provider has the meaning specified in ss. 1.01 of the
lntercreditor Agreement.

         Class B Liquidity Provider has the meaning specified in ss. 1.01 of the
lntercreditor Agreement.

         Class C Liquidity Provider has the meaning specified in ss. 1.01 of the
Intercreditor Agreement.

         Closings:  the closing with respect to the  acquisition of the Pass Through  Certificates by the Placement
Agent and the closing with respect to the acquisition of Certificates by the Pass Through Trustee.

         Code: the Internal  Revenue Code of 1986, as amended from time to time,
or any similar legislation of the United States enacted to supersede,  amend, or
supplement  such Code (and any  reference to a provision of the Code shall refer
to any successor provision(s), however designated).

         Collateral Account: the deposit account established and maintained pursuant to ss. 2.13 of the Indenture.

         Collateral Account Control  Agreement:  the Collateral Account Control Agreement dated as of September 30,
1997 among SSB, the Indenture Trustee, and the Owner Trustee.

         Commitment:  the amount of the Owner  Participant's  participation  in the Purchase  Price  required to be
made available or paid as provided in ss. 3.02 of the Participation Agreement.

         Corporate  Trust  Administration:  the Corporate  Trust  Administration
office of the Owner  Trustee  located at 225  Asylum  Street  (Goodwin  Square),
Hartford, CT 06103, Attention:  Corporation Trust Administration,  or such other
office  at  which  the  Owner  Trustee's   corporate  trust  business  shall  be
administered  which the Owner Trustee shall have  specified by notice in writing
to the Lessee, the Owner Participant and the Indenture Trustee.

         Corporate Trust  Department:  the Corporate Trust Department  office of
the Indenture Trustee located at 26 South Charles Street,  Baltimore,  MD 21201,
Attention:  Corporate  Trust  Department,  or such  other  office  at which  the
Indenture  Trustee's  corporate trust business shall be  administered  which the
Indenture  Trustee shall have specified by notice in writing to the Lessee,  the
Owner Participant and the Owner Trustee.
         CRAF Program has the meaning specified in ss. 13(d) of the Lease.
         Cut-Off Date: June 30, 1998.

         DOT: the U.S. Department of Transportation or any successor thereto.

         Debt Portion: the amount specified as such on Schedule III to the Participation Agreement.

         Debt  Rate.  the  weighted  average  (based on  Outstanding  principal  amount)  rate of  interest  on the
Certificates issued pursuant to the Indenture.

         Default:  (a) any event or  condition  which,  with the lapse of time or the  giving of  notice,  or both,
would constitute an Event of Default or (b) an Event of Default.

         Default Payment Date: defined in ss. 15(a)(3) of the Lease.

         Deficiency  Agreement.  The Deficiency  Agreement,  dated as of the Delivery  Date,  among SDIQ, the Owner
Participant, and the Owner Trustee, pertaining to the Aircraft.

         Delivery  Date:  the date on which the  Aircraft  is  delivered  and sold by the  Seller to the Lessor and
leased by the  Lessor to the  Lessee  under the Lease,  which  date  shall  also be the date of the  initial  Lease
Supplement.

         Delivery Notice:  notice of the Aircraft's  Delivery Date, given by the
Lessee as provided in ss. 3.01 of the Participation  Agreement and including any
notice with respect to a postponed Delivery Date given by the Lessee pursuant to
ss. 3.05(c) of the Participation Agreement.

         Downgrade  Drawing  has  the  meaning  specified  in  ss.  1.01  of the
Intercreditor Agreement.

         EBO: the early buy-out purchase option specified in ss. 16(a)(i) of the Lease.

         EBO Date has the meaning set forth in ss. 16(a) of the Lease.

         EBO Price has the meaning set forth in ss. 16(a) of the Lease.

         Eligible  Deposit  Account:  either (a) a  segregated  account  with an
Eligible  Institution or (b) a segregated trust account with the corporate trust
department of a depository  institution  with corporate  trust powers  organized
under the laws of the United  States or any state  thereof,  or the  District of
Columbia,  and whose  deposits  are  insured by the  Federal  Deposit  Insurance
Corporation,  provided  that such  institution  also has a combined  capital and
surplus of at least  $100,000,000  and a rating of A or better  from the Thomson
Bank Watch.

         Eligible Institution: a depository institution organized under the laws
of the  United  States or any one of the  states  thereof,  or the  District  of
Columbia,  or any domestic  branch of a foreign bank,  which in any such case at
all times (a) has either (x) a long-term  unsecured  debt rating of at least Aa2
by Moody's or (y) a short-term  certificate of deposit rating of P-1 by Moody's,
(b) has either (x) a long-term unsecured debt rating of a least AA by S&P or (y)
a short-term  certificate  of deposit rating of A-1+ by S&P, and (c) is a member
of the Federal Deposit Insurance Corporation.

         Engine:  each of the two General Electric  CF34-3-B1  engines listed by
its manufacturer's  serial number in the Lease Supplement and leased pursuant to
the  Lease,  whether  or not from  time to time  installed  on the  Airframe  or
installed on any other airframe or on any other  aircraft,  and any  Replacement
Engine which may from time to time be substituted  for an Engine pursuant to the
Lease, together with all Parts related thereto. Except as otherwise provided, at
such time as a  Replacement  Engine shall be so  substituted  and the Engine for
which the substitution is made shall be released from the Lien of the Indenture,
such  replaced  Engine shall cease to be an "Engine"  under the Lease.  The term
"Engines"  means, as of any date of  determination,  both Engines then leased to
the Lessee pursuant to the Lease.

         Engine Manufacturer: General Electric Company, a New York corporation.

         Engine  Manufacturer's  Consent: The General Electric Company Engine Consent and Agreement with respect to
the Engine Warranty Assignment, dated as of the Delivery Date, executed by the Engine Manufacturer.

         Engine Warranty  Assignment:  The Warranty  Assignment  (Atlantic Coast
Airlines  Trust No. __) dated as of the Delivery Date between the Lessor and the
Lessee with respect to the Engine  warranties under the GTA in substantially the
form of Exhibit F to the Participation Agreement, as such form may be amended on
or prior to the Delivery Date;  provided that no such amendment shall materially
adversely affect the interests of the Holders of the Certificates.

             ERISA: the Employee Retirement Income Security Act of 1974, as amended.

         Estimated  Expense Amount has the meaning  specified in ss. 10.01(a) of
the Participation Agreement.

         Event of Default: each of the events specified in ss. 14 of the Lease.

         Event  of  Loss:  any of  the  following  events  with  respect  to the
Aircraft, the Airframe or any Engine: (i) theft or disappearance for a period in
excess of 90 consecutive days; (ii)  destruction,  damage beyond economic repair
or rendition of such  property  permanently  unfit for normal use for any reason
whatsoever;  (iii) any event  which  results  in an  insurance  settlement  with
respect to such property on the basis of an actual,  constructive or compromised
total loss;  (iv)  condemnation,  confiscation  or seizure of, or requisition of
title to or use of such  property  by any  foreign  government  or any agency or
instrumentality  thereof,  for a period in excess of 180 consecutive days (or 30
consecutive days for the appropriation of title, or, in any of the cases in this
clause (iv),  such shorter  period ending on the  expiration  of the Term);  (v)
condemnation,  confiscation  or seizure of, or requisition of title to or use of
such property by the  Government for a period  extending  beyond the term of the
Lease (as the same may be extended pursuant to the terms thereof), provided that
no Event of Loss  shall be  deemed to have  occurred,  and the term of the Lease
shall be extended automatically for a period of six months in the event that the
Aircraft is requisitioned by the Government  pursuant to an activation under the
CRAF Program; and (vi) as a result of any law, rule, regulation,  order or other
action  by  the  Aeronautics   Authority  or  other   governmental  body  having
jurisdiction,  the use of the  Aircraft or Airframe in the normal  course of air
transportation of passengers shall have been prohibited by virtue of a condition
affecting all Canadair  Regional Jet Series 200ER aircraft equipped with engines
of the same make and model as the Engines for a period of 180  consecutive  days
(or beyond the end of the Term),  unless the Lessee,  prior to the expiration of
such 180-day  period,  shall be  diligently  carrying  forward all necessary and
desirable  steps to permit normal use of the Aircraft and shall within 12 months
have conformed at least one Canadair Regional Jet Series 200ER aircraft (but not
necessarily the Aircraft) to the requirements of any such law, rule, regulation,
order or action, and shall be diligently pursuing conformance of the Aircraft in
a  non-discriminatory  manner.  The date of such Event of Loss shall be (aa) the
91st  day  following  loss  of  such  property  or  its  use  due  to  theft  or
disappearance  (or  the  end of the  Term  if  earlier);  (bb)  the  date of any
destruction,  damage  beyond  economic  repair  or  rendition  of such  property
permanently  unfit for normal use; (cc) the date of any insurance  settlement on
the basis of an actual,  constructive or compromised  total loss; (dd) the 181st
day following condemnation,  confiscation, seizure or requisition of title to or
use of such  property by a foreign  government  referred to in clause (iv) above
(or the 31st day in the case of  appropriation  of title, or the end of the Term
if  earlier  than  such  181st or 31st  day);  (ee) the last day of the Term (as
automatically extended by six months in the case of an activation under the CRAF
Program) in the case of  requisition  of title to or use of such property by the
Government; and (ff) the last day of the applicable period referred to in clause
(vi) above (or if  earlier,  the end of the Term  without  the  Lessee's  having
conformed  at least one  Canadair  Regional  Jet Series  200ER  aircraft  to the
applicable requirements). An Event of Loss with respect to the Aircraft shall be
deemed  to have  occurred  if any  Event  of Loss  occurs  with  respect  to the
Airframe.

         Excepted Payments:  collectively, (i) indemnity, expense, reimbursement
or other  payments  paid or  payable  by the  Lessee  in  respect  of the  Owner
Participant,  the  Owner  Trustee  in its  individual  capacity  or any of their
respective  successors,   permitted  assigns,  directors,  officers,  employees,
servants and agents or Affiliates,  pursuant to the  Participation  Agreement or
any other Operative  Agreement or any indemnity  hereafter  granted to the Owner
Participant  or the Owner  Trustee in its  individual  capacity  pursuant to the
Lease  or  the  Participation  Agreement,  (ii)  proceeds  of  public  liability
insurance (or government indemnities in lieu thereof) in respect of the Aircraft
payable  as a result of  insurance  claims  paid for the  benefit  of, or losses
suffered  by, the Owner  Trustee or the  Indenture  Trustee in their  respective
individual  capacities  or  by  the  Owner  Participant,   or  their  respective
successors,  permitted  assigns  or  Affiliates,  (iii)  proceeds  of  insurance
maintained  with  respect  to the  Aircraft  by the Owner  Participant  (whether
directly or through the Owner  Trustee) or any Affiliate  thereof  maintained in
accordance  with ss.  12(e) of the  Lease but not  required  under ss. 12 of the
Lease, (iv) all right,  title and interest of the Owner Participant or the Owner
Trustee  in, to and under the Tax  Indemnity  Agreement,  including  payments of
Supplemental  Rent by the Lessee in respect of any amounts payable under the Tax
Indemnity  Agreement,  (v) any  purchase  price  paid or  payable  to the  Owner
Participant  for its interest in the Trust Estate pursuant to ss. 7.03(d) of the
Participation  Agreement,  (vi) any  Transaction  Costs  paid or  payable by the
Lessee to the Owner  Trustee  (to the extent for its sole  benefit) or the Owner
Participant pursuant to the Lease or the Participation Agreement, (vii) payments
under the RVG and/or the Deficiency Agreement, (viii) any payments in respect of
interest  to the extent  attributable  to  payments  referred  to in clauses (i)
through (vi) above, (ix) any amount payable under the ACA Guaranty in respect of
the foregoing, (x) any right to demand, collect or otherwise receive and enforce
the payment of any amount  described in clauses (i) through (v) and (vii) above,
and (xi) any right to exercise  any  election or option or make any  decision or
determination, or to give or receive any notice, consent, waiver or approval, or
to take any other  action in respect  of,  but in each case,  only to the extent
relating to, any Excluded Payments specified in clauses (i) through (x) above.

         Expenses has the meaning  specified in ss. 9.01(a) of the Participation
Agreement.

         Expiration Date: _____________, 201__.

         FAA:  see "Federal Aviation Administration".

         FAA Bill of Sale:  the bill of sale for the Airframe on AC Form 8050-2,
or such other form as may be approved by the Aeronautics Authority,  executed by
the Seller in favor of the Owner Trustee and dated the Delivery Date.

         Fair  Market  Rental:   the  amount   obtainable  in  an   arm's-length
transaction  between an informed and willing lessee under no compulsion to lease
and an informed and willing  lessor under no compulsion to lease,  in accordance
with a net lease on terms and conditions (except as to the amount of Basic Rent)
as provided in the Lease.  Such amount  shall be  determined  assuming  that the
Aircraft  is in the  condition  required by the Lease,  excluding  Airworthiness
Directives  that would not be  required  to be made until  after the  applicable
renewal  period  begins  (except  that a  determination  of Fair  Market  Rental
pursuant to ss. 15(a)(3) of the Lease shall be based on the actual  condition of
such property),  and assuming that all Removable Improvements have been removed.
If the Lessor and the Lessee do not agree upon Fair Market  Rental,  it shall be
determined in accordance with the Appraisal Procedure.

         Fair Market Value: the amount obtainable in an arm's-length transaction
between an informed and willing buyer under no compulsion to buy and an informed
and willing seller under no compulsion to sell.  Such amount shall be determined
assuming that the Aircraft is in the condition required by the Lease,  excluding
Airworthiness  Directives  that would not be required to be made until after the
valuation date (except that a determination of Fair Market Value pursuant to ss.
15(a)(3) of the Lease shall be based on the actual  condition of such property),
and assuming that all Removable  Improvements  have been removed.  If the Lessor
and the Lessee do not agree upon Fair Market  Value,  it shall be  determined in
accordance with the Appraisal Procedure.

         Federal  Aviation  Administration:  the United States Federal  Aviation  Administration  and any successor
agency or agencies thereto.

         Final   Drawing  has  the  meaning   specified   in  ss.  1.01  of  the
lntercreditor Agreement.

         FNBM: The First National Bank of Maryland, a national banking association.

         Government:  the United  States of America or an agency or  instrumentality  thereof  the  obligations  of
which bear the full faith and credit of the United States of America.

         GTA: the General Terms Agreement dated as of October,  1996 between the
Engine  Manufacturer and the Lessee with respect to certain support services for
the Engines, as originally  executed or as modified,  amended or supplemented in
accordance  with the  terms  thereof,  but only  insofar  as the  General  Terms
Agreement  related to the Engines,  to the extent  assigned to the Owner Trustee
pursuant as the Engine Warranty Assignment.

         Holder or Holder  of a  Certificate:  as of any  particular  time,  the
Person in whose name a Certificate  shall be  registered  (but not including the
holder of any Pass Through Certificate).

         Improvement has the meaning set forth in ss. 9(e) of the Lease.

         incorporated in: incorporated or installed in, attached to, or otherwise made a part of.

         Indemnitee:  each of  SSB,  in its  individual  capacity  and as  Owner
Trustee and Lessor, the Subordination  Agent, in its individual  capacity and in
its  capacity  as  Subordination  Agent,  each  Liquidity  Provider,  the  Owner
Participant,  the Indenture Trustee,  in its individual capacity and as trustee,
any Owner Participant Guarantor,  and any successor (including any trustee which
may succeed to the Lessor's  interest  under the Lease) and  Affiliate,  and, in
each case, any assign, officer, director,  employee, agent and servant of any of
the foregoing,  the Lessor's Estate, and the Trust Indenture Estate. Neither the
Pass  Through  Trustee  nor any holder of a Pass  Through  Certificate  shall be
deemed to be an Indemnitee.

         Indenture:  the Trust Indenture and Security Agreement  (Atlantic Coast Airlines Trust No. ______),  dated
as of  September  26,  1997,  between  the Lessor and the  Indenture  Trustee,  as  supplemented  by the  Indenture
Supplement.

         Indenture  Default:  (a) any event or condition which,  with the lapse of time or the giving of notice, or
both, would constitute an Indenture Event of Default, or (b) any Indenture Event of Default.

         Indenture Documents has the meaning specified in the Granting Clause of
the Indenture.

         Indenture Event of Default: each of the events specified in ss. 7.01 of the Indenture.

         Indenture  Supplement:  Indenture  Supplement No. 1 (Atlantic  Coast Airlines Trust No. ____), to be dated
the Delivery Date, substantially in the form of Exhibit A to the Indenture.

         Indenture  Trustee:  The First  National  Bank of Maryland,  a national  banking  association,  not in its
individual capacity but solely as trustee under the Indenture.

         Indenture  Trustee's Liens: any Lien against, on or with respect to the
Aircraft,  any Engine,  the Lessor's Estate or the Trust Indenture Estate or any
part thereof resulting from (i) claims against the Indenture Trustee not related
to the administration of the Trust Indenture Estate or any transactions pursuant
to the Indenture or any document  included in the Trust Indenture  Estate,  (ii)
any act or  omission  of the  Indenture  Trustee  which  is not  related  to the
transactions  contemplated by the Operative Agreements or is in violation of any
of the terms of the Operative  Agreements,  or (iii) Taxes  imposed  against the
Indenture Trustee in its individual  capacity in respect of which the Lessee has
not  indemnified  (and is not obligated to indemnify)  the Indenture  Trustee in
such capacity.

         Independent   Investment  Banker:  an  independent  investment  banking
institution of national standing  appointed by the Lessee that is independent in
fact, does not have any direct  financial  interests,  or any material  indirect
financial  interest,  in the Lessee or any  Affiliate of the Lessee,  and is not
connected  with the  Lessee  or any  Affiliate  of the  Lessee,  as an  officer,
employee, promoter, underwriter, trustee, partner, director or Person performing
similar  functions;  provided,  that if the  Indenture  Trustee  shall  not have
received  written  notice of such an  appointment  at least 10 days prior to the
Prepayment Date,  "Independent Investment Banker" shall mean such an institution
appointed by the Indenture Trustee.

         Initial Owner Participant: Atlantic Coast Airlines, a California corporation.

         Initial Reoptimization Date: has the meaning specified in ss. 2.03(b) of the Participation Agreement.

         Intercreditor  Agreement:  the  Intercreditor  Agreement  dated as of September  25, 1997,  among the Pass
Through Trustees,  the Class A Liquidity Provider,  the Class B Liquidity Provider,  the Class C Liquidity Provider
and the Subordination Agent.

         Interest  Drawing  has  the  meaning  specified  in  ss.  1.01  of  the
lntercreditor Agreement.

         Invoice: the invoice for the Aircraft given by the Seller to the Lessor.

         Item or Item of Equipment: the Airframe or an Engine.

         JAA: the Joint Aviation Authority (or any successor thereto) of the European Union.

         Lease:  the Lease  Agreement  (Atlantic  Coast Airlines Trust No. ____)
dated  as of the  Delivery  Date,  entered  into by the  Lessor  and the  Lessee
concurrently  with the execution and delivery of the  Indenture  Supplement,  in
substantially the form of Exhibit B to the Participation Agreement, as such form
may be amended on or prior to the Delivery Date as provided in the Participation
Agreement,  including, without limitation,  supplementation by one or more Lease
Supplements entered into pursuant to the applicable provisions of the Lease.

         Lease  Supplement:.  Lease  Supplement No. 1 (Atlantic  Coast  Airlines  Trust No. ____),  to be dated the
Delivery Date, substantially in the form of Exhibit A to the Lease.

         Lease Term: the period commencing on the Delivery Date and ending at the end of the Basic Term.

         Lessee: Atlantic Coast Airlines, a California corporation.

         Lessee  Documents  has the  meaning  set  forth in ss.  6.01(b)  of the
Participation Agreement.

         Lessor:  State  Street Bank and Trust  Company,  a  Massachusetts  trust  company,  not in its  individual
capacity but solely as Owner Trustee under the Trust Agreement.

         Lessor's Cost: has the meaning set forth in Exhibit B of the Lease.

         Lessor's  Estate:  all estate,  right,  title and interest of the Owner
Trustee in and to the Collateral Account,  the Liquid Collateral,  the Aircraft,
the Lease,  any Lease  Supplement,  the FAA Bill of Sale,  the Warranty  Bill of
Sale,  the  Purchase  Agreement,  the  Purchase  Agreement  Assignment,  the PAA
Consent,  any warranty with respect to the Airframe and the Engines, all amounts
of Basic Rent and Supplemental  Rent,  including without  limitation,  insurance
proceeds  (other than  insurance  proceeds  payable to or for the benefit of the
Owner  Trustee  in  its  individual  capacity  or  the  Owner  Participant)  and
requisition,  indemnity or other payments of any kind for or with respect to the
Aircraft  (except  amounts  owing to the  Owner  Participant,  to the  Indenture
Trustee,  to the Owner Trustee in its  individual  capacity,  or to any of their
respective directors,  officers, employees and agents pursuant to Articles 8 and
9 of the Participation  Agreement),  and all other property of the Owner Trustee
purportedly  subjected  to the  Lien of the  Indenture  by the  Granting  Clause
thereof;  provided that in no event shall "Lessor's Estate" include any Excepted
Payment.

         Lessor's Liens: Liens against, on or with respect to the Aircraft,  any
Engine,  the Lessor's Estate or the Trust Indenture  Estate or any part thereof,
title thereto or any interest  therein arising as a result of (i) claims against
the  Lessor,  in its  individual  capacity  or as Owner  Trustee,  or the  Owner
Participant or any Affiliate of such Owner Participant, in each case not related
to the Operative Agreements or the transactions  contemplated thereby, (ii) acts
or omissions of the Lessor in its individual capacity or as Owner Trustee, or of
the  Owner   Participant  or  any  Affiliate  of  such  Owner   Participant  not
contemplated  or permitted  under the terms of the Operative  Agreements,  (iii)
Taxes or Expenses imposed against the Lessor,  in its individual  capacity or as
Owner Trustee,  Owner  Participant  or any Affiliate of such Owner  Participant,
Lessor's  Estate  or the trust  created  by the  Trust  Agreement  which are not
required to be indemnified  against by the Lessee pursuant to the  Participation
Agreement by reason of ss. 8.01(b) or 9.01(b) thereof and which are not required
to be indemnified against by the Lessee pursuant to the Tax Indemnity Agreement,
or (iv)  claims  against  the  Lessor,  in its  individual  capacity or as Owner
Trustee, or the Owner Participant arising from the transfer by the Lessor or the
Owner  Participant  of its  interests in the Aircraft or any Engine other than a
transfer of the Aircraft pursuant to ss. 3(g), 3(i), 11, 13(a), 15, or 16 of the
Lease and other than a transfer  pursuant to the  exercise of the  remedies  set
forth in ss. 15 of the Lease.

         Letter of  Credit:  the  Letter of Credit  issued by  CrestarBank  in favor of the  Indenture  Trustee  as
security for the obligations of the Lessee  pursuant to the first sentence of Section 7.02(b) of the  Participation
Agreement.

         Lien: any mortgage, pledge, lien, charge, encumbrance,  lease, security
interest  (including any conditional sale agreement,  equipment trust agreement,
or other title  retention  agreement),  statutory  right in rem, claim, or other
similar interest of any nature whatsoever.

         Liquid  Collateral:  all amounts and securities  deposited from time to
time in the Collateral Account and all the products,  investments,  earnings and
proceeds of the  foregoing,  including,  but not limited to, all proceeds of the
investment or conversion thereof, voluntary or involuntary, into cash, Specified
Investments or other property,  all rights to payment of any and every kind, and
other forms of obligations, and instruments and other property which at any time
constitute all or part or are included in the proceeds of any of the foregoing.

         Liquidity  Facility  has  the  meaning  specified  in ss.  1.01  of the
lntercreditor Agreement.

         Liquidity  Provider  has  the  meaning  specified  in ss.  1.01  of the
Intercreditor Agreement.

         Losses has the meaning  specified in ss. 17.02(a) of the  Participation
Agreement.

         Loss  Payment  Date has the meaning  specified  in ss.  11(a)(2) of the
Lease.

         Majority in Interest of Certificate Holders: as of a particular date of
determination,  the Holders of more than 50% of the aggregate  unpaid  principal
amount of all  Certificates  outstanding as of such date (excluding for purposes
of this definition any  Certificates  held by (i) the Owner Trustee or the Owner
Participant or any interests of the Owner  Participant  unless all  Certificates
then outstanding are held by the Owner  Participant,  (ii) the Lessee,  or (iii)
any Affiliate of any thereof).

         Make-Whole  Premium:  an amount determined as of the third Business Day
before the applicable  Prepayment Date (or date of purchase, as the case may be)
which an Independent  Investment Banker determines to be equal to the excess, if
any,  of (i) the  present  value of the  remaining  scheduled  payments  of such
principal amount or portion thereof and interest thereon to the Maturity of such
Certificate computed by discounting such payments on a semi-annual basis on each
Payment Date  (assuming a 360-day year  consisting of twelve 30-day months) at a
discount rate equal to the Treasury Yield,  all as determined by the Independent
Investment Banker over (ii) the outstanding principal amount of such Certificate
plus accrued interest.

         Mandatory Document Terms. The terms set forth on Schedule V to the Participation Agreement.

         Mandatory Economic Terms. The terms set forth on Schedule IV to the Participation Agreement.

         Manuals and Technical  Records has the meaning set forth in ss. 9(b) of
the Lease.

         Manufacturer: Bombardier Inc., a Canadian corporation.

         Materially  Adverse Tax Event: any event (other than excessive  foreign
usage of the  Aircraft)  that makes it more likely than not that the Lessee will
be required to indemnify  any  Indemnitee  for Taxes under any of the  Operative
Agreements or the Owner Participant under the Tax Indemnity Agreement,  or both,
provided that (i) the estimated  aggregate of such indemnity  payments (computed
as a hypothetical  adjustment of Basic Rent or, if applicable,  Renewal Rent and
disregarding  any  indemnity  payments  waived  by  such  Indemnitee)  over  the
then-remaining  Term is equal to at least 5% of Basic Rent (and, if  applicable,
Renewal Rent) payable over the remaining  Term, and (ii) future  payments of the
Taxes giving rise to the  indemnity or  indemnities  will not be required if the
Lessee purchases the Aircraft.

         Maturity:  with  respect  to any  Certificate,  the date on  which  the  final  principal  amount  of such
Certificate is scheduled to be due and payable.

         Minimum Maintenance  Standards has the meaning specified in ss. 9(b) of
the Lease.

         Moody's: Moody's Investors Service, Inc.

         Net Present Value of Rents:  the net present cost to the Lessee,  as of
the Delivery Date, of all Basic Rent payments through the EBO Date, plus the EBO
Price, discounted at the Debt Rate compounded semi-annually.

         Non-U.S. Person: any Person other than a U.S. Person.

         Obsolete Parts:  Parts which the Lessee in good faith  determines to be
obsolete or no longer  suitable or  appropriate  for use on the  Airframe or any
Engine and which the Lessee is authorized  to remove from the Aircraft,  and not
replace, pursuant to the last sentence of ss. 9(d) of the Lease.

         Offering  Memo:  the  Lessee's  September  19,  1997  Offering  Memorandum   concerning  the  Pass-Through
Certificates.

         Officer's  Certificate:  when delivered  pursuant to the Indenture,  a certificate signed by a Responsible
Officer of the Lessee or the Owner Trustee,  as the case may be, and delivered to the Indenture Trustee.  Each such
certificate shall include the statements provided for in ss. 15.07 of the Indenture.

         Old Lease:  the  ________,  1997  Aircraft  Interim  Lease  Agreement,  between the Seller and the Lessee,
concerning the Aircraft.

         Old Lease Termination:  the Lease Termination Agreement,  dated the date of the Lease Supplement,  between
the Seller and the Lessee, pertaining to the Old Lease.

         Operative Agreements: the Participation Agreement, the Trust Agreement,
the FAA Bill of Sale, the Warranty Bill of Sale, the ACA Guaranty,  the Purchase
Agreement,  the  Purchase  Agreement  Assignment,  the PAA  Consent,  the Engine
Warranty  Assignment,  the Lease  (including  the Lease  Supplement),  the Owner
Participant  Guaranty,  if any,  the  Certificates  outstanding  at the  time of
reference, the Indenture (including the Indenture Supplement), the Tax Indemnity
Agreement,  each Liquidity Facility, the Intercreditor Agreement, the Deficiency
Agreement, the RVG, the Collateral Account Control Agreement, and any Assignment
and Assumption Agreement.

         Opinion of Counsel: when delivered pursuant to the Indenture, a written
opinion of legal  counsel,  who in the case of counsel (a) for the Lessee may be
(i) the general counsel of the Lessee,  (ii) Troutman Sanders LLP or a successor
firm, or (iii) other  outside  counsel  designated by the Lessee and  reasonably
satisfactory  to the  Indenture  Trustee,  and (b) for the Owner  Trustee or the
Indenture   Trustee,   an  attorney  selected  by  such  Person  and  reasonably
satisfactory  to the Lessee  and, in the case of the Owner  Trustee,  reasonably
satisfactory to the Indenture Trustee.

         Outstanding:  when used with respect to Certificates,  as of the date of determination  and subject to the
provisions of ss. 10.04 of the Indenture,  all Certificates  theretofore  executed and delivered under the Indenture,
with the exception of the following:

                  (i) Certificates theretofore canceled by the Indenture Trustee
                  or  delivered  to  the  Indenture   Trustee  for  cancellation
                  pursuant to ss. 2.08 of the Indenture or otherwise;

                  (ii)  Certificates for which prepayment money in the necessary
                  amount  has been  theretofore  deposited  with  the  Indenture
                  Trustee in trust for the Holders of such Certificates pursuant
                  to  ss.  14.01  of  the  Indenture;  provided,  that  if  such
                  Certificates are to be prepaid,  notice of such prepayment has
                  been  duly  given  pursuant  to  the  Indenture  or  provision
                  therefor  satisfactory to the Indenture Trustee has been made;
                  and

                  (iii)  Certificates  in exchange for or in lieu of which other
                  Certificates  have been  executed  and  delivered  pursuant to
                  Article II of the Indenture.

         Owner  Participant:  the Person to whom on the  Delivery  Date (or,  if
earlier,  the Transfer  Date) the Initial Owner  Participant  shall transfer its
Beneficial Interest pursuant to Section 3.02 of the Participation  Agreement and
any successors thereto, and any Person to which the Owner Participant transfers,
in accordance  with the Trust  Agreement and the  Participation  Agreement,  its
right,  title and interest in and to the Operative  Agreements  and the Lessor's
Estate.

         Owner Participant Guarantor:  the provider of an Owner Participant Guaranty.

         Owner  Participant  Guaranty:  any  guaranty  delivered  in  compliance  with ss.__(d) of the  Participation
Agreement.

         Owner  Trustee:  State  Street Bank and Trust  Company of  Connecticut,
National  Association,  not in  its  individual  capacity  except  as  otherwise
expressly stated, but solely as trustee under the Trust Agreement.

         Owner Trustee Guarantor: the provider of an Owner Trustee Guaranty.

         Owner Trustee  Guaranty:  any guaranty  delivered in compliance with  ss. 11.01(b)(ii)  of the Participation
Agreement.

         Owner's  Economic  Return:  the  Owner  Participant's  anticipated  net
after-tax yield and aggregate  after-tax cash flow during the Basic Term,  using
the multiple  investment sinking fund method of analysis,  computed on the basis
of the same  methodology and  assumptions,  including tax  assumptions,  as were
utilized by the initial Owner  Participant  in  determining  the Basic Rent, EBO
Price, EBO Date,  Stipulated Loss Values and Termination Values, as the case may
be, as in effect on the date of execution of the Participation  Agreement by the
Owner Participant as such assumptions may be adjusted for events which have been
the basis of adjustments to Rent pursuant to ss. 3(d) of the Lease.

         PAA Consent:  the PAA Consent,  dated as of the Delivery Date, executed by the Manufacturer and pertaining
to the Aircraft.

         Participation  Agreement:  the Participation  Agreement (Atlantic Coast
Airlines Trust No. ____),  dated as of September 30, 1997, among the Lessee, the
Owner  Trustee not in its  individual  capacity  except as  otherwise  expressly
provided therein,  but solely as owner trustee,  the Initial Owner  Participant,
the  Indenture  Trustee  not in its  individual  capacity  except  as  otherwise
expressly provided therein,  but solely as indenture  trustee,  the Pass-Through
Trustee not in its individual  capacity except as otherwise  expressly  provided
therein,  but solely as Pass-Through  trustee and the Subordination Agent not in
its individual  capacity except as otherwise  expressly  provided  therein,  but
solely as subordination agent.

         Parts: all appliances, parts, components,  instruments,  appurtenances,
accessories,  furnishings  and other  equipment of whatever  nature  (other than
complete  Engines or engines) which may from time to time be incorporated in the
Airframe or any Engine or title to which remains  vested in the Lessor  pursuant
to ss. 9(d) of the Lease.

         Pass-Through  Agreement:  each of the four  Pass-Through  Trust Agreements dated as of September 25,  1997
among the Lessee, ACA Inc. and the Pass-Through Trustee.

         Pass-Through  Certificates:   any  of  the  Pass-Through  Certificates,
1997-1-A,   the   Pass-Through   Certificates,    1997-1-B,   the   Pass-Through
Certificates, 1997-1-C, or the Pass-Through Certificates, 1997-1-D, in each case
as issued by the related  Pass-Through  Trust; and  "Pass-Through  Certificates"
means all of the  Pass-Through  Certificates  issued by each of the Pass-Through
Trusts.

         Pass-Through  Closing Date:  the Business Day on which the sale of the  Pass-Through  Certificates  to the
Placement Agent pursuant to the Placement Agreement takes place.

         Pass-Through  Trust:.  the Atlantic Coast Airlines 1997-1  Pass-Through
Trust  Class A,  Atlantic  Coast  Airlines  1997-1  Pass-Through  Trust Class B,
Atlantic Coast Airlines  1997-1  Pass-Through  Trust Class C, and Atlantic Coast
Airlines 1997-1  Pass-Through Trust Class D, in each case formed pursuant to the
Pass-Through Agreement; and "Pass-Through Trusts" means all of such Pass-Through
Trusts.

         Pass-Through  Trustee:  The First National Bank of Maryland, a national
banking  association,  in  its  capacity  as  Pass-Through  Trustee  under  each
Pass-Through Agreement and each Pass-Through Trust.

         Past Due  Rate:  in  respect  of (a) any  amount  payable  to the Owner
Participant  or the Owner  Trustee a rate per annum  during the period  from and
including the due date to but excluding the date on which such amount is paid in
full equal to 2% plus the Debt Rate, and (b) any principal of or interest on any
Certificate or any other amount payable under the Indenture,  any Certificate or
any other Operative Agreement that is not paid when due (whether at Maturity, by
acceleration,  by optional or mandatory  prepayment or otherwise) to any Holder,
the Indenture Trustee or the Pass-Through  Trustee,  a rate per annum during the
period from and  including  the due date to but excluding the date on which such
amount is paid in full  equal to (i) in the case of any such  amount  payable to
the Holder of any  Certificate,  2% plus the interest  rate  applicable  to such
Certificate,  and (ii) in the case of any other  such  amount,  2% plus the Debt
Rate (but,  in each case,  in no event  greater than the maximum  interest  rate
permitted by applicable law).

         Payment Date: each January 1 and July 1, commencing on January 1, 1998.

         Permitted Air Carrier:  (1) any Section 1110 Person that is not subject
to bankruptcy or similar proceedings when the sublease begins, (2) after the end
of the Recovery Period (or before that date, if the Lessee prepays in a lump sum
any  indemnity  required  under  the Tax  Indemnity  Agreement  as a result of a
sublease to such  foreign  air  carrier),  any  foreign air carrier  that is not
subject to bankruptcy or similar  proceedings  when the sublease term begins and
that is principally  based in and a domiciliary of any foreign country listed on
Exhibit E-2 to the Lease,  except those that do not maintain  normal  diplomatic
relations  with the United States or with which it would  constitute a breach of
applicable laws for the Lessor, the Indenture Trustee,  or the Owner Participant
to  engage  directly  or  indirectly  in  business,  or (3) after the end of the
Recovery  Period (or before that date,  if the Lessee  prepays in a lump sum any
indemnity  required under the Tax Indemnity  Agreement as a result of a sublease
to such foreign carrier),  with the Owner  Participant's  prior written consent,
any foreign air carrier that is not principally  based in and a domiciliary of a
country listed on Exhibit E-2 to the Lease,  if at the time of such sublease the
Owner Participant receives an opinion satisfactory to the Owner Participant from
counsel satisfactory to the Owner Participant to the effect that there exists no
possessory  rights in favor of such sublessee under the laws of such sublessee's
country which would,  upon the bankruptcy of or other default by the Lessee (and
assuming that at such time the  sublessee is not insolvent or bankrupt)  prevent
the return of the Aircraft or part thereof to the Lessor in accordance  with and
when  permitted by the terms of the Lease upon the exercise by the Lessor of its
remedies thereunder, provided that at the time of the sublease the United States
maintains  diplomatic  relations  with the  country  in which such  foreign  air
carrier is based.

         Permitted  Investments:  (a) direct obligations of the United States of
America  or  any  agency  or  instrumentality  thereof,  (b)  obligations  fully
guaranteed  by the United  States of  America  or any agency or  instrumentality
thereof,  (c) certificates of deposit issued by, or bankers'  acceptances of, or
time deposits or a deposit  account with, any bank,  trust company,  or national
banking association  incorporated or doing business under the laws of the United
States of America or one of the states  thereof,  having a combined  capital and
surplus of at least  $100,000,000  and having a rating of "A" or better from the
Keefe Bank Watch Service, (d) commercial paper issued by companies in the United
States  which  directly  issue  their own  commercial  paper and which are doing
business  under the laws of the  United  States of  America or one of the states
thereof and in each case having a rating assigned to such commercial  paper by a
nationally  recognized rating organization in the United States of America equal
to the highest rating assigned by such  organization,  or (e) obligations of the
type described in clauses (a) through (d) above,  purchased from any bank, trust
company,  or banking  association  referred  to in clause (c) above  pursuant to
repurchase   agreements   obligating  such  bank,  trust  company,   or  banking
association to repurchase  any such  obligation not later than 30 days after the
purchase of any such obligation.  Unless  otherwise  specified in writing by the
Owner  Trustee,  all such Permitted  Investments  shall mature not later than 30
days from the date of purchase.

         Permitted Lien: a Lien permitted under ss. 8 of the Lease.

         Permitted  Sublessee:  any  Permitted  Air Carrier;  or any airframe or
engine manufacturer, or Affiliate of such a manufacturer,  which is domiciled in
the United States of America or, after the end of the Recovery Period (or before
that date, if the Lessee prepays in a lump sum any indemnity  required under the
Tax Indemnity Agreement as a result of a sublease to such foreign  manufacturer)
domiciled  in a country  listed on  Exhibit  E-2 to the  Lease,  or in any other
country to which the Owner  Participant  gives its prior written  consent (which
shall not be unreasonably withheld or delayed).

         Person:  any  individual,  sole  proprietorship,   partnership,   joint
venture, joint stock company, trust, unincorporated  organization,  association,
corporation,  institution,  entity or government (federal, state, local, foreign
or any agency, instrumentality, division or body thereof).

         Placement Agent: Morgan Stanley & Co. Incorporated.

         Placement  Agreement:  the Placement Agreement dated September 19, 1997 among the Lessee and the Placement
         --------------------
Agent.

         Prepayment  Date  has  the  meaning  specified  in ss.  6.02(b)  of the
Indenture.

         Prepayment  Price  has the  meaning  specified  in ss.  6.02(b)  of the
Indenture.

         Principal  Amount:  with  respect to a  Certificate  means the stated  original  principal  amount of such
Certificate and, with respect to all  Certificates,  means the aggregate stated original  principal  amounts of all
Certificates.

         Property:  any right or  interest  in or to property of any kind  whatsoever,  whether  real,  personal or
mixed and whether tangible or intangible.

         Purchase  Agreement:  the  Purchase  Agreement  (No.  RJ 350),  dated as of January 8, 1997,  between  the
Manufacturer  and the Lessee,  including all exhibits,  appendices  and letter  agreements,  but only to the extent
that  the  foregoing  relate  to the  Aircraft  and to the  extent  assigned  pursuant  to the  Purchase  Agreement
Assignment.

         Purchase  Agreement  Assignment:  the Purchase  Agreement  Assignment  (Atlantic  Coast Airlines Trust No.
__________),  dated as of the Delivery Date between the Lessor and the Lessee in substantially  the form of Exhibit
E of the Participation  Agreement,  as such form may be amended on or prior to the Delivery Date;  provided that no
such amendment shall materially adversely affect the interests of the Holders of the Certificates.

         Purchase Price: the Lessor's Cost as set forth on Exhibit B to the Lease.

         Rating Agencies:  collectively, at any time, each nationally recognized
rating  agency  which  shall  have  been  requested  to  rate  the  Pass-Through
Certificates and which shall then be rating the Pass-Through  Certificates.  The
initial Rating Agencies will be Moody's and S&P.

         Rating Agency  Confirmation:  with respect to any  Operative  Agreement
that is to be  modified  in any  material  respect on the  Delivery  Date or the
Transfer Date, if  applicable,  a written  confirmation  from each of the Rating
Agencies that the use of such Operative  Agreement with such modifications would
not  result in (i) a  reduction  of the  rating  for any  Class of Pass  Through
Certificates  below  the then  current  rating  for such  Class of Pass  Through
Certificates  or (ii) a withdrawal  or  suspension of the rating of any Class of
Pass Through Certificates.

         Record Date: with respect to Payment Dates under the Indenture  (except
a date for  payment of  defaulted  interest),  December 15 for January 1 Payment
Dates  and June 15 for  July 1  Payment  Dates,  whether  or not such  date is a
Business Day.

         Recourse  Amount  has  the  meaning  specified  in  ss.  17.10  of  the
Participation Agreement.

         Recovery Period:  the period prior to the end of the Owner  Participant's  taxable year which includes the
seventh anniversary of the Delivery Date.

         Refinancing:  a  non-recourse  loan to the  Lessor  arranged  pursuant  to  ss. 15.01  of the  Participation
Agreement.

         Register has the meaning set forth in ss. 3.02 of the Indenture.

         Registrar has the meaning set forth in ss. 3.02 of the Indenture.

         Regulation  D:  Regulation  D of the Board of  Governors of the Federal
Reserve System (or any successor),  as the same may be modified and supplemented
and in effect from time to time.

         Related Indentures:  collectively, (i) the Trust Indenture and Security
Agreement for each of Atlantic  Coast Airlines  Trust Nos.  _______,  _________,
________,  _________, and ________, each dated as of September 26, 1997, between
the Owner  Trustee  and the  Indenture  Trustee,  (ii) the Trust  Indenture  and
Security  Agreement  for each of  Atlantic  Coast  Airlines  Trust Nos.  N306UE,
N310UE,  N311UE,  and N314UE,  each dated as of September 26, 1997,  between the
Owner Trustee and the Indenture  Trustee,  each with respect to a Jetstream J-41
aircraft,  and (iii) the Trust  Indenture  and  Security  Agreement  dated as of
September 26, 1997 between Atlantic Coast Airlines and the Indenture Trustee.

         Related  Leases:  the other lease  agreements  between the Lessor (acting as Owner Trustee for the benefit
of the Owner Participant) and the Lessee, each with respect to a Canadair Regional Jet Series 200ER aircraft.

         Remaining  Weighted  Average  Life: on a given date with respect to any
Certificate  the number of days equal to the  quotient  obtained by dividing (i)
the sum of each of the products  obtained by multiplying  (a) the amount of each
then  remaining  scheduled  payment of principal of such  Certificate by (b) the
number of days from and  including  such  prepayment  date to but  excluding the
dates on which each such payment of  principal is scheduled to be made;  by (ii)
the then outstanding principal amount of such Certificate.

         Removable  Improvements  has the  meaning  set forth in ss. 9(e) of the
Lease.

         Renewal Rent: the amount  payable by the Lessee as rent in accordance  with ss. 3(h) of the Lease during any
Renewal Term.

         Renewal  Term:  one or more terms with respect to which the Lessee has  exercised  its option to renew the
Lease pursuant to ss. 3(h) thereof.

         Rent:  all payments  due from the Lessee under the Lease as Basic Rent,  Renewal  Rent,  and  Supplemental
Rent, collectively.

         Rent Payment Date: each Payment Date during the Term.

         Reoptimization  Date has the meaning  specified in ss.  15.02(a) of the
Participation Agreement.

         Replacement Aircraft: any aircraft substituted for the Aircraft pursuant to ss. 11(a)(1) of the Lease.

         Replacement Airframe: has the meaning set forth in ss. 11(a)(1) of the Lease.

         Replacement Engine: a General Electric CF34-3B1 engine (or an engine of
the same or  another  manufacturer)  of equal or greater  value,  airworthiness,
remaining  useful  life and  utility as the Engine  being  replaced  (determined
without regard to hours or cycles  remaining until the next scheduled  overhaul,
but  assuming  that the Engine  replaced  was in the  condition  required by the
Lease),  together with all Parts  relating to such engine,  which is substituted
for an Engine  pursuant to the terms of the Lease;  provided,  however,  that if
such  replacement  engine  is  not a  General  Electric  CF34-3B1  engine,  such
replacement  engine  must  then  be  commonly  used in the  commercial  aviation
industry on Canadair Regional Jet Series 200ER airframes;  and provided further,
that the  Engines  subject  to the Lease at any given  time shall be of the same
make and model.

         Replacement Parts has the meaning set forth in ss. 9(d) of the Lease.

         Responsible  Officer:  with  respect to the Owner  Trustee  (except for
purposes of the Trust  Agreement  in which case the  definition  of  Responsible
Officer  set forth in ss.  3.10 of the Trust  Agreement  is  applicable)  or the
Indenture  Trustee,  any officer in its Corporate Trust  Administration,  as the
case  may be,  designated  by such  Person  to  perform  obligations  under  the
Operative Agreements, and with respect to any other party, any corporate officer
of  a  party  who,  in  the  normal   performance  of  his  or  her  operational
responsibilities,  with respect to the subject matter of any covenant, agreement
or obligation  of such party  pursuant to any  Operative  Agreement,  would have
responsibility  for and  knowledge  of such matter and the  requirements  of any
Operative Agreement with respect thereto.

         RVG: the Residual  Agreement,  dated as of the Delivery  Date,  between the  Manufacturer  and the Lessor,
pertaining to the Aircraft.

         S&P: Standard & Poor's Ratings Group.

         Scheduled  Delivery  Date: the Delivery Date  specified in the Delivery  Notice  pursuant to ss. 3.01 of the
Participation Agreement.

         SDIQ: Societe de Developpment Industriel du Quebec, a Quebec corporation.

         SEC:  the  Securities  and  Exchange  Commission  of the  United  States  and any  successor  agencies  or
authorities.

         Section  1110  Person:  a Citizen of the United  States who is an air carrier  holding a valid air carrier
operating  certificate  issued  pursuant  to 49  U.S.C.  ch.  447  for  aircraft  capable  of  carrying  10 or more
individuals.

         Secured Obligations has the meaning specified in the Granting Clause of
the Indenture.

         Securities Act: the Securities Act of 1933, as amended.

         Seller: [Bombardier Capital Inc./First Security Bank, National Association] [the Manufacturer].

         Series  "A"  or  "Series  A  Certificates":   Certificates  issued  and
designated  as  "Series  A" under the  Indenture,  in the  Principal  Amount and
maturities and bearing interest as specified in Exhibit B to the Indenture under
the heading "Series A".

         Series  "B"  or  "Series  B  Certificates":   Certificates  issued  and
designated  as  "Series  B" under the  Indenture,  in the  Principal  Amount and
maturities and bearing interest as specified in Exhibit B to the Indenture under
the heading "Series B".

         Series  "C"  or  "Series  C  Certificates":   Certificates  issued  and
designated  as  "Series  C" under the  Indenture,  in the  Principal  Amount and
maturities and bearing interest as specified in Exhibit B to the Indenture under
the heading "Series C".

         Series  "D"  or  "Series  D  Certificates":   Certificates  issued  and
designated  as  "Series  D" under the  Indenture,  in the  Principal  Amount and
maturities and bearing interest as specified in Exhibit B to the Indenture under
the heading "Series D".

         Sinking Fund Redemption  Date has the meaning  specified in ss. 6.06 of
the Indenture.

         Sinking Fund Redemption Price has the meaning  specified in ss. 6.06 of
the Indenture.

         SLV Determination Date has the meaning set forth in ss. 11(a)(2) of the
Lease.

         Special Aviation Counsel: Daugherty, Fowler & Peregrin.

         Specified  Default:  (a) an event or condition  described in ss. 14(a),  (b), (h), or (i) of the Lease that,
after the giving of notice or lapse of time,  or both,  would  mature into an Event of Default,  or (b) an Event of
Default.

         Specified  Investments:  (a) direct obligations of the United States of
America or  obligations  fully  guaranteed by the United States of America;  (b)
commercial  paper rated  A-1/P-1 by S&P and  Moody's,  respectively  or, if such
ratings are unavailable,  rated by any nationally recognized rating organization
in the  United  States  equal to the  highest  rating  assigned  by such  rating
organization;  (c)  investments  in  negotiable  certificates  of deposit,  time
deposits, banker's acceptances, commercial paper or other direct obligations of,
or obligations  guaranteed by,  commercial banks organized under the laws of the
United States or of any political  subdivision  thereof (or any U.S. branch of a
foreign bank) with issuer ratings of at least B/C by Thomson  Bankwatch,  having
maturities  no later than 90 days  following  the date of such  investment;  (d)
overnight federal funds  transactions with members of the Federal Reserve System
arranged by federal funds brokers; or (e) overnight  repurchase  agreements with
respect to the  securities  described  in clause (a) above  entered into with an
office of a bank or trust  company  which is  located  in the  United  States of
America or any bank or trust  company  which is organized  under the laws of the
United  States or any state  thereof  and has  capital,  surplus  and  undivided
profits aggregating at least $500 million.

         SSB:  State  Street  Bank and Trust  Company of  Connecticut,  National  Association,  a national  banking
association.

         Stipulated Loss Value:  (1) as of any Stipulated Loss Value Date during
the Basic Term, the amount determined as set forth in Exhibit C to the Lease for
that  Payment  Date,  and (2) during any Renewal  Term,  the amount for the date
involved, determined in accordance with ss. 3(h) of the Lease.

         Stipulated  Loss Value Date: for any month,  the day in such month specified in Exhibit C to the Lease or,
if such day is not a Business Day, the immediately succeeding Business Day.

         Sublease: any sublease agreement covering any Item(s) between the Lessee and a Permitted Sublessee.

         Sublessee: a Permitted Sublessee under a Sublease in effect at the time in question.

         Subordination  Agent:  The First National Bank of Maryland,  a national  banking  association,  not in its
individual capacity but solely as Subordination Agent.

         Supplemental  Rent:  (a)  all  amounts,  liabilities,  indemnities  and
obligations  (other than Basic Rent or Renewal Rent) which the Lessee assumes or
agrees  to pay  under the  Lease or under  the  Participation  Agreement  or Tax
Indemnity  Agreement or any other Operative  Agreement to the Lessor,  the Owner
Participant,  the Indenture  Trustee,  the  Subordination  Agent,  any Liquidity
Provider or others, including,  without limitation,  payments of Stipulated Loss
Value, EBO Price, and amounts  calculated by reference to Termination Value, any
amounts of  Make-Whole  Premium  payable  under the  Indenture  (other  than any
Make-Whole  Premium payable as a result of an Indenture Event of Default that is
not a Lessee  Event of Default,  and all  amounts  required to be paid by Lessee
under the agreements,  covenants,  and indemnities  contained in the Lease or in
the  Participation  Agreement  or the  Tax  Indemnity  Agreement  or  any  other
Operative  Agreement,  but excluding  Basic Rent and Renewal  Rent,  and (b) all
amounts that the Owner Trustee is obligated to pay in accordance with clause (b)
of the last paragraph of ss. 2.04 of the Indenture.

         Tax  or  Taxes  has  the  meaning  set  forth  in  ss.  8.01(a)  of the
Participation Agreement.

         Tax Indemnity  Agreement:  the Tax Indemnity Agreement  (Atlantic Coast Airlines Trust No. ______),  dated
as of the Delivery Date or the Transfer Date, between the Lessee and the Owner Participant.

         Term: the Basic Term of the lease for the Aircraft  under the Lease and, if renewed  pursuant to ss. 3(h) of
the Lease, each Renewal Term for the Aircraft for which the Lease is renewed.

         Termination  Date:  the date of  termination  of the Lease as  specified by the Lessee in its notice given
pursuant to ss. 3(g) thereof.

         Termination Value: as of any Payment Date, the amount determined as set
forth in Exhibit D to the Lease for that Payment  Date,  adjusted as required by
ss. 3(d) of the Lease.  Notwithstanding any other provisions of the Lease or the
Participation  Agreement  or the  Indenture,  each  Termination  Value  for  the
Aircraft shall be, under any circumstances and in any event, an amount, together
with Basic Rent due and owing through the date of payment of Termination  Value,
at least  sufficient  to pay in full as of such date of  payment  the  aggregate
unpaid principal amount of and accrued interest on the Certificates  outstanding
on such date of payment  (assuming  that  principal  and interest  payments with
respect to the Certificates have been paid when due).

         Termination  Value Date: for any month,  the day in such month  specified in Exhibit D to the Lease or, if
such day is not a Business Day, the immediately succeeding Business Day.

         Transaction Costs:  those costs and expenses set forth in ss. 10.01(a) of the Participation  Agreement to be
borne by the Owner Participant.

         Transfer Date: has the meaning set forth in Section 2.02(b) of the Participation Agreement.

         Transportation  Code: Title 49 of the United States Code, subtitle VII,
as amended and in effect on the date of the Lease or as subsequently amended, or
any successor or substituted  legislation at the time in effect and  applicable,
and the regulations promulgated pursuant thereto.

         Treasury  Yield:  at the  time of  determination  with  respect  to any
Certificate,  the interest rate (expressed as a semi-annual  equivalent and as a
decimal and, in the case of United States  Treasury  bills,  converted to a bond
equivalent  yield)  determined to be the per annum rate equal to the semi-annual
yield to maturity for United States Treasury  securities maturing on the Average
Life Date of such  Certificate  and  trading  in the public  securities  markets
either as determined  by  interpolation  between the most recent weekly  average
yield to maturity for two series of United States Treasury  securities,  trading
in public  securities  markets,  (i) one  maturing as close as possible  to, but
earlier  than,  the  Average  Life Date of such  Certificate  and (ii) the other
maturing as close as possible to, but later than,  the Average Life Date of such
Certificate,  in each case as  published in the most recent  H.15(519)  or, if a
weekly average yield to maturity for United States Treasury  securities maturing
on the Average Life Date of such Certificate is reported on the most recent H.15
(519),  such weekly  average  yield to maturity as published in such  H.15(919).
"H.15(519)"  means the weekly  statistical  release  designated  as such, or any
successor  publication,  published  by the  Board of  Governors  of the  Federal
Reserve System.  The date of determination  of a Make-Whole  Premium will be the
third Business Day prior to the applicable  prepayment date and the "most recent
H.15(519)"  means the H.15(519)  published prior to the close of business on the
third Business Day prior to the applicable prepayment date.

         Trust  Agreement:  the  Trust  Agreement  (Atlantic  Coast  Airlines  Trust No.  __________),  dated as of
September 1, 1997, between the Initial Owner Participant and the Owner Trustee in its individual capacity.

         Trust Estate: the Lessor's Estate.

         Trust Indenture Act: the Trust Indenture Act of 1939, as amended.

         Trust Indenture Estate:  all estate,  right,  title and interest of the
Indenture  Trustee  in  and  to  any of  the  property,  rights,  interests  and
privileges  granted to the Indenture  Trustee pursuant to the Granting Clause of
the Indenture,  other than Excepted Payments and any and all other rights of the
Owner Trustee or the Owner Participant  expressly  reserved to the Owner Trustee
or the Owner Participant pursuant to the Indenture.

         United States, U.S., or US: the United States of America.

         U.S. Person: a Person described in ss. 7701(a)(30) of the Code.

         Warranty  Bill of Sale:  the full  warranty  bill of sale  covering the
Aircraft (and  specifically  referring to each Engine) executed by the Seller as
owner of the Aircraft in favor of the Owner Trustee and to be dated the Delivery
Date.


<PAGE>


iv



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




                     TRUST INDENTURE AND SECURITY AGREEMENT

                    (Atlantic Coast Airlines Trust No. ____)

                         dated as of September 26, 1997


                                     between

                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION,
             not in its individual capacity, but solely as trustee,
                                  Owner Trustee


                                       and

                      THE FIRST NATIONAL BANK OF MARYLAND,
             not in its individual capacity, but solely as trustee,
                                Indenture Trustee



                             COVERING ONE CANADAIR REGIONAL JET, SERIES 200ER AIRCRAFT
                  SERIAL NO. _____, REGISTRATION NO. __________




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




<PAGE>



iv

                                TABLE OF CONTENTS



                                                                                                               Page


Initial Recitals
Granting Clause

HABENDUM CLAUSE...................................................................................................5


ARTICLE I - DEFINITIONS...........................................................................................7

Section 1.01. Definitions.........................................................................................7

ARTICLE II - ISSUE, EXECUTION, FORM AND REGISTRATION OF CERTIFICATES; COLLATERAL ACCOUNT..........................7

Section 2.01. Authentication and Delivery of Certificates.........................................................7
Section 2.02. Execution of Certificates...........................................................................7
Section 2.03. Certificate of Authentication.......................................................................7
Section 2.04. Form and Terms of Certificates; Payments on Certificates............................................8
Section 2.05. Payments from Trust Indenture Estate Only..........................................................10
Section 2.06. Registration. Transfer and Exchange................................................................10
Section 2.07. Mutilated. Defaced, Destroyed, Lost and Stolen Certificates........................................11
Section 2.08. Cancellation of Certificates: Destruction Thereof..................................................12
Section 2.09. Temporary Certificates.............................................................................12
Section 2.10. Termination of Interest in Trust Indenture Estate..................................................13
Section 2.11. Certificates in Respect of Replacement Aircraft....................................................13
Section 2.12. Assumption of Obligations Under Certificates and Other Operative Agreements........................13
Section 2.13. Establishment of Collateral Account................................................................13
Section 2.14. Investment of Funds on Deposit in the Collateral Account...........................................14
Section 2.15. Release of Collateral Account on Delivery Date or Assumption of Certificates.......................14
Section 2.16. Cut-Off Date.......................................................................................15
Section 2.17. Subordination......................................................................................15
Section 2.18. Reoptimization.....................................................................................16

ARTICLE III - COVENANTS..........................................................................................16

Section 3.01. Payment of Principal. Make-Whole Premium and Interest..............................................16
Section 3.02. Offices for Payments, etc..........................................................................16
Section 3.03. Appointment to Fill a Vacancy in Office of Indenture Trustee.......................................16
Section 3.04. Paying Agents......................................................................................16
Section 3.05. Covenants of SSB and the Owner Trustee.............................................................17
Section 3.06. [Reserved].........................................................................................17
Section 3.07. Disposal of Trust Indenture Estate.................................................................18
Section 3.08. No Representations or Warranties as to Aircraft or Documents.......................................18
Section 3.09. Further Assurances: Financing Statements...........................................................18

ARTICLE IV - HOLDER LISTS........................................................................................18

Section 4.01. Holder Lists: Ownership of Certificates............................................................18

ARTICLE V - RECEIPT, DISTRIBUTION AND APPLICATION OF INCOME FROM THE TRUST INDENTURE ESTATE......................19

Section 5.01. Basic Rent Distribution............................................................................19
Section 5.02. Event of Loss and Replacement; Prepayment..........................................................20
Section 5.03. Payment After Indenture Event of Default. etc......................................................21
Section 5.04. Certain Payments...................................................................................23
Section 5.05. Other Payments.....................................................................................23
Section 5.06. Payments to Owner Trustee..........................................................................23
Section 5.07. Application of Payments............................................................................23
Section 5.08. Investment of Amounts Held by Indenture Trustee....................................................24
Section 5.09. Withholding Taxes..................................................................................25
Section 5.10. Letter of Credit...................................................................................25

ARTICLE VI - PREPAYMENT OF CERTIFICATES..........................................................................25

Section 6.01. No Prepayment Except as Specified..................................................................25
Section 6.02. Prepayment of Certificates.........................................................................25
Section 6.03. Notice of Prepayment to Holders....................................................................27
Section 6.04. Deposit of Prepayment Price and Sinking Fund Redemption Price......................................27
Section 6.05. Certificates Payable on Prepayment Date............................................................28
Section 6.06. Mandatory Sinking Fund Redemption..................................................................28

ARTICLE VI - INDENTURE EVENTS OF DEFAULT; REMEDIES OF INDENTURE TRUSTEE AND HOLDERS..............................28

Section 7.01. Indenture Event of Default.........................................................................28
Section 7.02. Remedies...........................................................................................30
Section 7.03. Return of Aircraft. etc............................................................................32
Section 7.04. Indenture Trustee May Prove Debt...................................................................34
Section 7.05. Remedies Cumulative................................................................................35
Section 7.06. Suits for Enforcement..............................................................................35
Section 7.07 Discontinuance of Proceedings.......................................................................36
Section 7.08. Limitations on Suits by Holders....................................................................36
Section 7.09. Unconditional Right of Holders to Payments on Certificates.........................................36
Section 7.10. Control by Holders.................................................................................36
Section 7.11. Waiver of Past Indenture Default...................................................................37
Section 7.12. Notice of Indenture Default........................................................................37

ARTICLE VIII  - RIGHTS OF THE OWNER TRUSTEE AND THE OWNER PARTICIPANT............................................38

Section 8.01. Certain Rights of Owner Trustee and Owner Participant..............................................38
Section 8.02. Owner Participant's Right to Prepay or Purchase the Certificates...................................40
Section 8.03. Certain Rights of Owner Participant................................................................41

ARTICLE IX - CONCERNING THE INDENTURE TRUSTEE....................................................................43

Section 9.01. Acceptance of Trusts...............................................................................43
Section 9.02 Duties Before;  and During, Existence of Indenture Event of Default.................................43
Section 9.03. Certain Rights of the Indenture Trustee............................................................44
Section 9.04. Indenture Trustee Not Responsible for Recitals, Certificates or Proceeds...........................45
Section 9.05. Indenture Trustee and Agents May Hold Certificates; Collections, etc...............................46
Section 9.06. Moneys Held by Indenture Trustee...................................................................46
Section 9.07. Right of Indenture Trustee to Rely on Officer's Certificate, etc...................................46
Section 9.08. Replacement Airframes and Replacement Engines......................................................46
Section 9.09 Indenture Supplement for Replacements...............................................................49
Section 9.10. Effect of Replacement..............................................................................49
Section 9.11. Compensation.......................................................................................49

ARTICLE X - CONCERNING THE HOLDERS...............................................................................49

Section 10.01. Evidence of Action Taken by Holders...............................................................49
Section 10.02. Proof of Execution of Instruments and of Holding of Certificates..................................50
Section 10.03. Holders to Be Treated as Owners...................................................................50
Section 10.04. Certificates Owned by Owner Trustee or Lessee Deemed Not Outstanding..............................50
Section 10.05. Right of Revocation of Action Taken...............................................................51
Section 10.06. ERISA.............................................................................................51

ARTICLE XI - INDEMNIFICATION OF INDENTURE TRUSTEE BY OWNER TRUSTEE...............................................51


ARTICLE XII - SUCCESSOR TRUSTEES.................................................................................52

Section 12.01. Notice of Successor Owner Trustee.................................................................52
Section 12.02. Resignation and Removal of Indenture Trustee: Appointment of Successor............................52
Section 12.03. Persons Eligible for Appointment as Indenture Trustee.............................................53
Section 12.04. Acceptance of Appointment by Successor Trustee....................................................54
Section 12.05. Merger, Consolidation or Succession to Business of Indenture Trustee..............................54
Section 12.06. Appointment of Separate Trustees..................................................................55

ARTICLE XIII -  SUPPLEMENTS AND AMENDMENTS TO THIS TRUST INDENTURE AND OTHER DOCUMENTS...........................56

Section 13.01. Supplemental Indentures Without Consent of Holders................................................56
Section 13.02. Supplemental Indentures With Consent of Holders...................................................58
Section 13.03. Effect of Supplemental Indenture..................................................................59
Section 13.04. Documents to Be Given to Indenture Trustee........................................................59
Section 13.05. Notation on Certificates in Respect of Supplemental Indentures....................................59
Section 13.06. No Request Necessary for Lease Supplement or Indenture Supplement.................................59
Section 13.07. Notices to Liquidity Providers....................................................................59

ARTICLE XIV - SATISFACTION AND DISCHARGE OF INDENTURE;UNCLAIMED MONEYS...........................................60

Section 14.01. Satisfaction and Discharge of Indenture: Termination of Indenture.................................60
Section 14.02. Application by Indenture Trustee of Funds Deposited for Payment of Certificates...................61
Section 14.03. Repayment of Moneys Held by Paying Agent..........................................................61
Section 14.04. Transfer of Unclaimed Money Held by Indenture Trustee and Paying Agent............................61

ARTICLE XV - MISCELLANEOUS.......................................................................................61

Section 15.01. Capacity in Which Acting..........................................................................61
Section 15.02. No Legal Title to Trust Indenture Estate in Holders...............................................61
Section 15.03. Sale of Trust Indenture Estate by Indenture Trustee is Binding....................................62
Section 15.04. Indenture Benefits Trustees, Participants, Lessee, and Liquidity Providers Only...................62
Section 15.05. No Action Contrary to Lessee's Rights Under the Lease.............................................62
Section 15.06. Notices...........................................................................................62
Section 15.07. Officer's Certificates and Opinions of Counsel....................................................62
Section 15.08. Severability......................................................................................63
Section 15.09. No Oral Modifications or Continuing Waivers.......................................................63
Section 15.10. Successors and Assigns............................................................................63
Section 15.11. Headings..........................................................................................63
Section 15.12. Normal Commercial Relations.......................................................................63
Section 15.13. Governing Law; Counterparts.......................................................................64




Exhibit A         --       Form of Indenture and Security Agreement Supplement
Exhibit B         --       Form of Certificate

Schedule I        --       Definitions

Schedule II       --       Amortization Schedule



<PAGE>



66



                     TRUST INDENTURE AND SECURITY AGREEMENT
                      (ATLANTIC COAST AIRLINES TRUST NO. )



               TRUST INDENTURE AND SECURITY  AGREEMENT  (ATLANTIC COAST AIRLINES
TRUST NO. _________) dated as of September 26, 1997 (the  "Indenture"),  between
STATE STREET BANK AND TRUST  COMPANY OF  CONNECTICUT,  NATIONAL  ASSOCIATION,  a
national  banking  association,  not  in  its  individual  capacity,  except  as
otherwise  specifically  set  forth  herein  (when  acting  in  such  individual
capacity,  "SSB"),  but solely as owner trustee (the "Owner  Trustee") under the
Trust Agreement,  as defined herein, and THE FIRST NATIONAL BANK OF MARYLAND,  a
national banking association (when acting in its individual  capacity,  "FNBM"),
as Indenture Trustee hereunder (the "Indenture Trustee").


    W I T N E S S E T H:


         WHEREAS,  capitalized  terms  used  herein  shall  have the  respective
meanings set forth or referred to in Article I hereof;

         WHEREAS,  the  Initial  Owner  Participant  and SSB have,  prior to the
execution  and  delivery  of this  Indenture,  entered  into a  Trust  Agreement
(Atlantic Coast Airlines Trust No.  ___________) dated as of September 26, 1997,
(as  amended or  otherwise  modified  from time to time in  accordance  with the
provisions thereof and of the Participation  Agreement,  the "Trust Agreement"),
whereby,  among other  things,  SSB has declared a certain trust for the use and
benefit of the Initial Owner Participant,  subject, however, to the Lien of this
Indenture  for the use and benefit of, and with the  priority of payment to, the
holders  of  the  Certificates  issued  hereunder,  and  the  Owner  Trustee  is
authorized and directed to execute and deliver this Indenture;

         WHEREAS,  the Owner  Trustee  desires by this  Indenture,  among  other
things (i) to provide for the issuance by the Owner Trustee of  Certificates  as
provided in the Participation Agreement, and (ii) to provide for the assignment,
mortgage and pledge by the Owner  Trustee to the Indenture  Trustee,  as part of
the Trust Indenture  Estate  hereunder of the Owner Trustee's  right,  title and
interest  in  the  Liquid  Collateral  and  after  the  Delivery  Date  for  the
assignment,  mortgage and pledge by the Owner Trustee to the Indenture  Trustee,
as part of the Trust Indenture Estate hereunder,  of among other things, certain
of the Owner Trustee's estate,  right, title and interest in and to the Aircraft
and the Indenture  Documents and certain  payments and other amounts (other than
Excepted Payments) received hereunder or thereunder in accordance with the terms
hereof, as security for, among other things, the Owner Trustee's  obligations to
the Certificate Holders and for the benefit and security of such Holders;

         WHEREAS,  all  things  have  been done to make the  Certificates,  when
executed  by  the  Owner  Trustee,  and  authenticated,   issued  and  delivered
hereunder, the valid obligations of the Owner Trustee; and

         WHEREAS, all things necessary to make this Indenture the valid, binding
and legal  obligation of the Owner Trustee,  enforceable in accordance  with its
terms, have been done and performed and have happened.

         NOW, THEREFORE, the parties agree as follows:


    GRANTING CLAUSE

         NOW,  THEREFORE,  in  consideration  of the mutual  promises  contained
herein and to secure (i) the prompt  payment of the principal of and  Make-Whole
Premium, if any, and interest on, and all other amounts due with respect to, all
the  Certificates  from time to time  outstanding  under this  Indenture and all
other amounts due hereunder and (ii) the performance and observance by the Owner
Trustee of all the agreements,  covenants and provisions in this  Indenture,  in
the Certificates,  in the Participation Agreement and in the Lease contained for
the benefit of the Holders of the  Certificates,  and the prompt  payment of any
and all amounts from time to time owing under the Participation Agreement by the
Owner Trustee, any Owner Participant or the Lessee to the Holders  (collectively
the  "Secured  Obligations")  and for the uses and  purposes  and subject to the
terms and provisions of this Indenture, and in consideration of the premises and
of the covenants in this Indenture and in the  Certificates  and of the purchase
of the  Certificates  by their  Holders,  and of the sum of $1 paid to the Owner
Trustee by the  Indenture  Trustee at or before the delivery of this  Indenture,
the receipt and sufficiency of which are hereby acknowledged,  the Owner Trustee
has  granted,  bargained,  sold,  assigned,  transferred,  conveyed,  mortgaged,
pledged,  granted a first priority security interest in and confirmed,  and does
hereby grant, bargain,  sell, assign,  transfer,  convey,  mortgage,  pledge and
grant a  first  priority  security  interest  in and  confirm  to the  Indenture
Trustee, its successors and assigns, in trust for the equal and ratable security
and  benefit  of the  Holders  from  time to time of the  Certificates,  a first
priority  security  interest in and first  mortgage  Lien on all estate,  right,
title and interest of the Owner Trustee in, to and under the following described
property,   rights  and   privileges   other  than  Excepted   Payments,   which
collectively,   excluding   Excepted   Payments  but   including   all  property
specifically subjected to the Lien of this Indenture by the terms hereof, by any
supplement  to  this  Indenture  (including  the  Indenture  Supplement)  or any
mortgage supplemental to this Indenture, are included within the Trust Indenture
Estate,  subject  always to the rights granted to the Owner Trustee or any Owner
Participant hereunder and to the other terms and conditions of this Indenture:

         (1) The  Airframe,  as described in the Indenture  Supplement,  and any
airframe  substituted in replacement  thereof pursuant to the provisions of this
Indenture;  the  Engines,  as the same are more  particularly  described  in the
Indenture  Supplement,  whether or not such  Engines  shall be  installed  in or
attached  to the  Airframe or any other  airframe,  and any  Replacement  Engine
therefor;  and all Parts in  respect of the  Airframe  and the  Engines  and all
records,  logs and other  documents at any time  maintained  with respect to the
foregoing property;

         (2) The Lease and all Rent thereunder,  including,  without limitation,
all  amounts of Basic  Rent and  Supplemental  Rent,  and  payments  of any kind
thereunder and including all rights of the Owner Trustee to execute any election
or option or to give or receive any notice, consent, waiver or approval under or
in respect of the Lease or to accept any  surrender  of the Aircraft or any part
thereof  as well as any  rights,  powers  or  remedies  on the part of the Owner
Trustee, whether arising under the Lease or by statute or at law or in equity or
otherwise arising out of any Event of Default;

         (3) The  Purchase  Agreement  (to the extent  assigned by the  Purchase
Agreement Assignment),  the Purchase Agreement Assignment,  the PAA Consent, the
Engine Manufacturer's  Consent, the FAA Bill of Sale, the Warranty Bill of Sale,
and the  Participation  Agreement (to the extent of amounts payable to the Owner
Trustee  thereunder)  (collectively,  and  together  with the  Lease,  the Trust
Agreement,  and the  Certificates,  the  "Indenture  Documents"),  including all
rights of the Owner  Trustee to  execute  any  election  or option or to give or
receive any notice,  consent,  waiver or approval  under or in respect of any of
the foregoing documents and instruments;

         (4) All the tolls, rents, issues, profits, products, revenues and other
income  (including  sales proceeds) of the property  subjected or required to be
subjected to the Lien of this Indenture, and all of the estate, right, title and
interest  of the  Owner  Trustee  in and to the  same  and  every  part  of said
property;

         (5) The Collateral Account,  the Liquid Collateral and all other moneys
and  securities  (including  Permitted  Investments)  now or  hereafter  paid or
deposited or required to be paid or deposited to or with the  Indenture  Trustee
by or for the account of the Owner Trustee pursuant to any term of any Operative
Agreement,  except the Tax Indemnity Agreement,  and held or required to be held
by the Indenture Trustee hereunder;

         (6) All  requisition  proceeds with respect to the Aircraft or any part
thereof (to the extent of the Owner Trustee's  interest  therein pursuant to the
terms of the Lease) and all  insurance  proceeds with respect to the Aircraft or
any part thereof from  insurance  required to be  maintained by the Lessee under
Section 12 of the Lease,  but excluding  any insurance  maintained by the Lessee
and not required under Section 12 of the Lease; and

         (7)      All proceeds of the foregoing.

         EXCLUDING,  HOWEVER,  from the foregoing grant of the Lien and security
interest of this Indenture and from the Trust Indenture Estate, (i) all Excepted
Payments,  including  without  limitation  all right,  title and interest of any
Owner  Participant  in, to and under the Tax Indemnity  Agreement and any moneys
due or to become due under the Tax Indemnity Agreement and all rights to collect
and enforce  Excepted  Payments  and (ii)  rights  granted to or retained by the
Owner  Trustee or any Owner  Participant  hereunder and SUBJECT TO the following
provisions:

         (a) (i) whether or not an Indenture Event of Default shall occur and be
continuing,  the  Owner  Trustee  and any Owner  Participant  shall at all times
retain the right,  to the  exclusion of the Indenture  Trustee:  (A) to Excepted
Payments and to commence an action at law to obtain or otherwise demand, sue for
or receive and enforce the payment of such  Excepted  Payments,  (B) to exercise
any  election  or option or make any  decision  or  determination  or to give or
receive any notice (including notice of Default), consent, waiver or approval in
respect of any such  Excepted  Payment,  (C) to adjust (and make any decision or
determination  or give any notice or consent with respect to) Basic Rent and the
percentages  relating to Stipulated Loss Value and Termination Value and the EBO
Price,  and the EBO Date,  as provided in Section  3(d) of the Lease and Section
15.01 of the Participation  Agreement, (D) to exercise any election or option to
make any decision or determination,  or to give or receive any notice,  consent,
waiver or approval,  or to take any other action in respect of, but in each case
only to the extent relating to, Excepted Payments (except for, in respect of any
portion of Basic Rent constituting an Excepted Payment,  any action changing the
manner by which such Basic Rent is to be paid),  (E) to retain the rights of the
"Lessor" with respect to  solicitations  of bids, and the election to retain the
Aircraft  pursuant  to  Section  3(g) of the  Lease,  (F) to retain the right of
"Lessor" to determine  the Fair Market  Rental or Fair Market Value  pursuant to
the  respective  definitions  thereof,  (G) to exercise  all other rights of the
Lessor under  Sections 3(h) and 16 of the Lease with respect to the retention or
purchase  by the Lessee or the Lessor of the  Aircraft  or the  exercise  by the
Lessee of the  Lessee's  renewal or purchase  options,  (H) to retain all rights
with respect to insurance  maintained for its own account which Section 12(e) of
the Lease  specifically  confers  on the  "Owner  Participant",  (I) to  approve
appraisers,  lawyers and other professionals and receive notices,  certificates,
reports,  filings,  opinions and other  documents,  in each case with respect to
matters  relating to the Owner  Participant's  tax position,  (J) to approve any
accountants  to be used  in the  verification  of any  Rent  adjustment,  (K) to
exercise,  to the extent  necessary  to enable it to exercise  its rights  under
Section 8.03 hereof,  the rights of the "Lessor"  under Section 19 of the Lease,
and (L) to  consent  to  changes  to the list of  countries  on Exhibit E of the
Lease, and to Permitted Air Carriers and Permitted Sublessees;

         (ii)  whether or not an Indenture  Event of Default  shall occur and be
continuing,  the Owner  Trustee and the  Indenture  Trustee  shall each have the
rights separately but not to the exclusion of the other: (A) to receive from the
Lessee all notices, certificates,  reports, filings, opinions of counsel, copies
of all documents and all  information  which the Lessee is permitted or required
to give or furnish to the "Lessor" pursuant to the Lease or to the Owner Trustee
pursuant to any other Operative  Agreement,  (B) to exercise  inspection  rights
pursuant  to Section 10 of the Lease  (provided  that if an  Indenture  Event of
Default  shall be  continuing,  no  inspection  right of the Owner Trustee shall
interfere with the efforts of the Indenture  Trustee to exercise  remedies under
the Lease or this Indenture),  (C) to maintain  separate  insurance  pursuant to
Section  12(e) of the  Lease and to  retain  all  rights  with  respect  to such
insurance  maintained for its own account, and (D) to give any notice of default
under Section 14 of the Lease;

         (iii)  subject to the last  sentence of this clause (a), (A) so long as
no Indenture  Event of Default not  constituting  an Event of Default shall have
occurred  and be  continuing  (but  subject to the  provisions  of Section  8.01
hereof),  the Owner  Trustee  shall  retain the right,  to the  exclusion of the
Indenture Trustee (or, if an Indenture Event of Default that is also an Event of
Default shall have occurred and be  continuing,  acting  jointly with and not to
the exclusion of the Indenture Trustee),  to exercise all rights,  elections and
options  of the  Lessor in  connection  with the  return of the  Aircraft  under
Section 5 of the Lease (but not Section 15 thereof, it being understood that the
Indenture  Trustee shall have the exclusive right to exercise  remedies pursuant
to such Section 15,  including in respect of any related  return of the Aircraft
pursuant  to  Section  5 of the  Lease),  including  the  right  to  approve  as
satisfactory  any  accountants,  engineers,  appraisers  or  counsel  to  render
services for or issue appraisals, reports, certificates or opinions to the Owner
Trustee  and to  exercise  all  rights,  elections  and options of the Lessor in
connection with the return of the Aircraft pursuant to the express provisions of
the Operative  Agreements,  and (B) so long as no Indenture Event of Default not
constituting  an Event of Default  shall have  occurred and be  continuing  (but
subject to the  provisions  of Section 8.01  hereof),  the Owner  Trustee  shall
retain the right,  jointly with the  Indenture  Trustee  (agreement  of both not
being required), to further assurances and financial information from the Lessee
pursuant  to Section 20 of the Lease  (other than the right to receive any funds
to be delivered to the "Lessor"  under the Lease  (except funds  delivered  with
respect to Excepted Payments);

         (iv) subject to the last  sentence of this clause (a), at all times the
Owner  Trustee  shall have the right as Lessor,  but not to the exclusion of the
Indenture Trustee,  to seek specific  performance of the covenants of the Lessee
under the Lease relating to the protection, insurance,  maintenance,  possession
and use of the Aircraft; and

         (v) at all times the Owner Trustee and any Owner Participant shall have
the rights  granted to them  under  Articles  VI,  VIII and X and  Section  7.02
hereof.

         Notwithstanding the foregoing,  but subject always to the provisions of
Section 15.05 hereof,  the Indenture  Trustee shall at all times have the right,
to the exclusion of the Owner Trustee and any Owner  Participant,  to (A) (other
than with respect to Excepted Payments) declare the Lease to be in default under
Section 15 thereof or any statute (including,  without limitation, Article 2A of
the Uniform  Commercial  Code) and (B) subject  only to the  provisions  of this
Indenture  (other than in  connection  with  Excepted  Payments),  exercise  the
remedies  set forth in such Section 15 of the Lease,  in any statute  (including
without  limitation  Article 2A of the Uniform  Commercial  Code), at law and in
Article 7 hereof.

         (b) The leasehold interest granted to the Lessee by the Lease shall not
be subject to the security  interest  granted by this Indenture,  and nothing in
this Indenture  shall affect the rights of the Lessee under the Lease so long as
no Event of Default has occurred and is continuing.


HABENDUM CLAUSE

         TO HAVE AND TO HOLD the aforesaid  property unto the Indenture Trustee,
its  successors  and  assigns,  in trust for the equal and  ratable  benefit and
security  of the  Holders  from time to time of the  Certificates,  without  any
priority of any one Certificate over any other and for the uses and purposes and
subject to the terms and  conditions  set forth in this Indenture and the rights
of the Owner Trustee and the Owner Participant under this Indenture.

         It is expressly agreed that anything contained in this Indenture to the
contrary  notwithstanding,  the Owner  Trustee  shall  remain  liable  under the
Indenture Documents to perform all of the obligations assumed by it under any of
those documents, all in accordance with and pursuant to the terms and provisions
of  those  documents,   and  the  Indenture  Trustee  and  the  Holders  of  the
Certificates shall have no obligation or liability under the Indenture Documents
by reason of or arising out of the assignment  under this  Indenture,  nor shall
the  Indenture  Trustee  or the  Holders  of the  Certificates  be  required  or
obligated  in any  manner to perform or  fulfill  any  obligations  of the Owner
Trustee  under or pursuant to the  Indenture  Documents  or, except as expressly
provided in this  Indenture,  to make any payment,  or to make any inquiry as to
the nature or sufficiency of any payment  received by it, or present or file any
claim, or take any action to collect or enforce the payment of any amounts which
may have  been  assigned  to it or to which  it may be  entitled  at any time or
times.

         Effective upon the occurrence and  continuance of an Indenture Event of
Default, the Owner Trustee hereby constitutes the Indenture Trustee the true and
lawful attorney of the Owner Trustee,  irrevocably, with full power (in the name
of the Owner Trustee or otherwise),  subject to the terms and conditions of this
Indenture, to ask, require,  demand, receive,  compound and give acquittance for
any  and all  Basic  Rent,  Supplemental  Rent  payable  to the  Owner  Trustee,
Stipulated Loss Value and Termination Value payments, insurance proceeds and any
and all moneys and claims for moneys due and to become due under or arising  out
of the Lease (subject to Section 8.01 hereof) or the other  Indenture  Documents
(other than Excepted  Payments),  to endorse any checks or other  instruments or
orders in  connection  with the same and to file any claims,  take any action or
institute any proceeding which the Indenture Trustee may deem to be necessary or
advisable in the premises.

         Under the Lease the Lessee is  directed  to make all  payments  of Rent
(other than Excepted Payments not constituting  Basic Rent) payable to the Owner
Trustee and all other  amounts  (other than Excepted  Payments not  constituting
Basic Rent) which are required to be paid to or deposited with the Owner Trustee
pursuant to the Lease  directly to the Indenture  Trustee at such address in the
United States of America as the Indenture  Trustee shall specify for application
as provided in this Indenture. The Owner Trustee agrees that if, notwithstanding
such provision, it shall have received any such amounts,  promptly on receipt of
any such payment,  it will transfer to the Indenture  Trustee any and all moneys
from time to time received by the Owner Trustee  constituting  part of the Trust
Indenture  Estate for  distribution  by the Indenture  Trustee  pursuant to this
Indenture,  except that the Owner Trustee shall accept for distribution pursuant
to the  Trust  Agreement  (i) any  amounts  distributed  to it by the  Indenture
Trustee under this Indenture,  and (ii) any Excepted  Payments not  constituting
Basic Rent.

         The Owner Trustee  agrees that at any time and from time to time,  upon
the written  request of the  Indenture  Trustee,  the Owner Trustee will, at the
expense of the Lessee, promptly and duly execute and deliver or cause to be duly
executed and delivered any and all such further instruments and documents as the
Indenture  Trustee may reasonably  deem desirable in obtaining the full benefits
of the  assignment  hereunder  and of the  rights  and  powers  herein  granted;
provided,  however,  that the Owner  Trustee shall have no obligation to execute
and deliver or cause to be executed or  delivered to the  Indenture  Trustee any
such  instrument or document if such  execution and delivery would result in the
imposition  of  additional  liabilities  on  the  Owner  Trustee  or  any  Owner
Participant  or would  result in a burden on such Owner  Participant's  business
activities,  unless the Owner Trustee or such Owner Participant, as the case may
be,  is  indemnified  to  its  reasonable   satisfaction   against  any  losses,
liabilities  and  expenses  incurred  in  connection  with  such  execution  and
delivery.

         The Owner  Trustee does hereby  warrant and  represent  that it has not
assigned,  pledged or otherwise  disposed of, and hereby  covenants that it will
not  assign  or  pledge  or  otherwise  dispose  of,  so long as the  assignment
hereunder shall remain in effect and shall not have been terminated  pursuant to
Section 14.01 hereof,  any of its right,  title or interest hereby assigned,  to
anyone other than the Indenture Trustee, and that it will not, except in respect
of Excepted Payments or otherwise as provided in or permitted by this Indenture,
enter  into  an  agreement  amending  or  supplementing  any  of  the  Indenture
Documents,  settle or  compromise  any claim  (other  than  claims in respect of
Excepted  Payments)  against  the  Lessee  arising  under  any of the  Indenture
Documents, or submit or consent to the submission of any dispute,  difference or
other matter arising under or in respect of any of the Indenture  Documents,  to
arbitration thereunder.

         Concurrently with the delivery of this Indenture, the Owner Trustee has
delivered to the Indenture Trustee executed counterparts of the Trust Agreement.

         It is hereby  further  covenanted and agreed by and between the parties
as follows:


                                    ARTICLE I

                                   DEFINITIONS

         Section  1.01.  Definitions.  Unless the  context  otherwise  requires,
capitalized  terms utilized herein shall have the meanings set forth in Schedule
I hereto for all purposes of this  Indenture and shall be equally  applicable to
both the singular and plural forms of the terms defined.


                                   ARTICLE II

                           ISSUE, EXECUTION, FORM AND
                          REGISTRATION OF CERTIFICATES;
                               COLLATERAL ACCOUNT

         Section 2.01.  Authentication  and Delivery of Certificates.  Forthwith
upon the  execution  and  delivery  of this  Indenture,  and  from  time to time
thereafter,  Certificates in an aggregate  principal amount not in excess of the
amount  specified  in Section  2.04  hereof  (except as  otherwise  provided  in
Sections  2.06 and 2.07  hereof)  shall be  executed  by the Owner  Trustee  and
delivered to the Indenture Trustee for authentication, and the Indenture Trustee
shall thereupon  authenticate and deliver said  Certificates to or upon the oral
or written  order of the Owner  Trustee,  signed,  if written,  by an authorized
officer of the Owner Trustee, without any further action by the Owner Trustee.

         Section 2.02.  Execution of  Certificates.  The  Certificates  shall be
signed on behalf of the Owner  Trustee by an  authorized  officer  of SSB.  Such
signatures  may be the manual or facsimile  signatures of such officer and minor
errors or defects in any reproduction of any such signature shall not affect the
validity or enforceability of any Certificate which has been duly  authenticated
and delivered by the Indenture Trustee.

         In  case  any  officer  of  SSB  who  shall  have  signed  any  of  the
Certificates  shall cease to be such officer  before the  Certificate  so signed
shall be authenticated  and delivered by the Indenture Trustee or disposed of by
SSB,  such  Certificate  nevertheless  may be  authenticated  and  delivered  or
disposed of as though the person who signed such  Certificate  had not ceased to
be such officer of SSB; and any Certificate may be signed on behalf of the Owner
Trustee by such  person or persons as, at the actual  date of the  execution  of
such  Certificate,  shall be the proper officers of SSB, although at the date of
the  execution  and delivery of this  Indenture  any such person was not such an
officer.  Certificates  bearing the facsimile signatures of individuals who were
authorized  officers of SSB at the time such Certificates were issued shall bind
the Owner  Trustee,  notwithstanding  that such  individuals or any of them have
ceased to hold such  offices  prior to the  authentication  and delivery of such
Certificates  or did not  hold  such  offices  at the  respective  dates of such
Certificates.

         Section 2.03. Certificate of Authentication.  Only such Certificates as
shall bear thereon a certificate of authentication substantially in the form set
forth in Exhibit B, executed by the Indenture Trustee by manual signature of one
of its  authorized  officers,  shall be entitled to the security and benefits of
this  Indenture or be valid or obligatory for any purpose.  Such  certificate by
the Indenture  Trustee upon any Certificate  executed by the Owner Trustee shall
be  conclusive  evidence that the  Certificate  so  authenticated  has been duly
authenticated  and delivered  hereunder and that the Holder, as evidenced on the
Register, is entitled to the security and benefits of this Indenture.

         Section 2.04. Form and Terms of Certificates; Payments on Certificates.
The Certificates and the Indenture Trustee's certificate of authentication shall
be  substantially  in the form set forth in Exhibit B hereto.  Certificates  may
differ  with   respect  to  Maturity   (subject  to  Section   15.01(d)  of  the
Participation  Agreement)  and as to  other  terms.  The  Certificates  shall be
issuable  as  registered  securities  without  coupons  and  shall be  numbered,
lettered,  or otherwise  distinguished in such manner or in accordance with such
plans as the Owner Trustee executing the same may determine with the approval of
the Indenture Trustee.

         The   aggregate   principal   amount  of   Certificates   that  may  be
authenticated  and delivered  under this Indenture is limited as provided in the
form of  Certificate  attached as Exhibit B hereto.  The  Certificates  shall be
issued in registered form only and in  denominations  of $1,000 and any integral
multiple thereof,  shall be dated the Certificate  Closing Date, shall be issued
in four separate series consisting of Series A, Series B, Series C, and Series D
and shall be issued in the  Maturities  and  principal  amounts,  and shall bear
interest at the rates per annum,  specified in the form of Certificate set forth
in Exhibit B.

         Any of the  Certificates  may be issued  with  appropriate  insertions,
omissions,  substitutions  and  variations,  and may have imprinted or otherwise
reproduced thereon such legend or legends,  not inconsistent with the provisions
of this  Indenture,  as may be required to comply with any law or with any rules
or regulations  pursuant thereto,  or with the rules of any securities market in
which the Certificates are admitted to trading, or to conform to general usage.

         Each Certificate shall bear interest from the date of original issuance
thereof or from the most  recent date to which  interest  has been paid and duly
provided for, as the case may be, which shall be payable on the dates  specified
on the face of the form of  Certificate  set forth in Exhibit B hereto until the
principal  thereof  is paid.  Interest  shall be  calculated  on the  basis of a
360-day year of twelve 30-day months.

         Notwithstanding  the preceding  paragraph,  each Certificate shall bear
interest at the Past Due Rate on any  principal,  interest  and any other amount
payable  hereunder  or under such  Certificate,  which shall not be paid in full
when due (whether at stated maturity,  by acceleration,  by mandatory prepayment
or  otherwise),  for the period from and  including  the due date thereof to but
excluding the date the same is paid in full, payable from time to time on demand
of the Indenture Trustee.

         The principal of, and Make-Whole  Premium, if any, and interest on, the
Certificates shall be payable at the Corporate Trust Department of the Indenture
Trustee or at any  office or agency  maintained  for such  purpose  pursuant  to
Section 3.02 hereof in immediately available funds prior to 10:30 A.M. (New York
time) on the due date  thereof and the  Indenture  Trustee  shall remit all such
amounts  received  by it to the  Holders  at such  account or  accounts  at such
financial  institution or  institutions  as the Holders shall have designated to
the Indenture Trustee in writing,  in immediately  available funds, such payment
to be made if the payment was received  prior to 10:30 A.M. New York time by the
Indenture  Trustee  on any  Business  Day,  by 12:00  noon New York time on such
Business Day; otherwise,  the Indenture Trustee shall make payment promptly, but
not later than 11:00 A.M.  New York time on the next  succeeding  Business  Day;
provided,  however,  that interest may be payable at the option of the Indenture
Trustee or its Paying Agent,  as defined in Section 3.04, by mailing  checks for
such  interest  payable to or upon the  written  order of the  Holders  entitled
thereto as they shall appear on the  Register.  If any amount  payable under the
Certificates, or under this Indenture, falls due on a day that is not a Business
Day, then such sum shall be payable on the next succeeding Business Day, without
(provided that payment is made on such next succeeding  Business Day) additional
interest thereon for the period of such extension.

         The Holder at the close of business on any Record Date with  respect to
any Payment  Date shall be  entitled  to receive the  interest if any payable on
such Payment Date  notwithstanding  any transfer or exchange of such Certificate
subsequent to the Record Date and prior to such Payment  Date,  except if and to
the extent the Owner Trustee shall default in the payment of the interest due on
such Payment Date, in which case such  defaulted  interest  shall be paid to the
Holder at the close of business on a subsequent  Record Date (which shall be not
less than five or more than 15  Business  Days  prior to the date of  payment of
such defaulted interest)  established by notice given by mail by or on behalf of
the Owner Trustee to the Holders not less than 15 days preceding such subsequent
Record Date.

         The  Owner  Trustee  agrees  to  pay  to  the  Indenture   Trustee  for
distribution  in  accordance  with Section 5.04 hereof (a) any and all indemnity
amounts received by the Owner Trustee which are payable by the Lessee to (i) the
Indenture Trustee in its individual  capacity,  (ii) the Subordination  Agent or
(iii) each  Liquidity  Provider,  in each case pursuant to Article 8 or 9 of the
Participation  Agreement  (it  being  acknowledged  that  the  Lessee  has  been
instructed  to pay such amounts to the Person or Persons  entitled  thereto) and
(b) the Owner  Trustee's  pro rata share of all amounts  owed to each  Liquidity
Provider by the  Subordination  Agent under each  Liquidity  Facility other than
amounts due as (i) repayments of the principal of advances thereunder,  and (ii)
interest on Interest  Drawings and Final Drawings  except to the extent included
in Net  Interest  and  Related  Charges.  As  used in this  Section,  the  Owner
Trustee's pro rata share means as of any time:

                  (A) with  respect to all amounts  other than Net  Interest and
         Related  Charges,  a fraction the  numerator of which is the  aggregate
         principal  balance then  outstanding of the  Certificates  issued under
         this Indenture other than the Series D Certificates and the denominator
         of which is the aggregate  principal balance of all Certificates issued
         under this Indenture and the Related Indentures other than the Series D
         Certificates, plus

                  (B) with respect to all Net  Interest and Related  Charges (x)
         if there exists a Payment  Default under any  Certificate  issued under
         this  Indenture a fraction,  the  numerator  of which is the  aggregate
         principal  balance then  outstanding of Certificates  issued under this
         Indenture  other than the Series D Certificates  and the denominator of
         which  is the  aggregate  principal  balance  then  outstanding  of all
         Certificates  issued under this  Indenture  and the Related  Indentures
         other than the Series D Certificates under which there exists a Payment
         Default or (y) at all other times, zero.

As used in this Section, "Net Interest and Related Charges" means the sum of (i)
the amount, if any, by which interest payable to each Liquidity  Provider on any
Interest  Drawing and Final Drawing exceeds the amount which would be payable if
such drawings bore interest at the weighted  average Past Due Rate applicable to
amounts in default  on all  Certificates  plus (ii) any  amounts  payable  under
Section  3.1,  Section  3.2,  Section  3.3,  Section  3.9 or Section 7.7 of each
Liquidity Facility (or similar provisions of any replacement Liquidity Facility)
which  result  from  any  Interest  Drawing  or Final  Drawing.  As used in this
Section,  a "Payment Default" when used in connection with a Certificate  issued
hereunder or a Certificate issued under any Related Indenture means a default in
the payment of principal thereof or interest thereon (which default has not been
cured), other than solely because of acceleration.

         Section 2.05.  Payments from Trust Indenture  Estate Only. All payments
to be made by the Owner Trustee under this Indenture shall be made only from the
income and the proceeds from the Lessor's  Estate to the extent  included in the
Trust  Indenture  Estate  and from any other  amounts of the type  described  in
Section 5.01 hereof (but only to the extent  actually  received by the Indenture
Trustee)  and only to the extent that the Owner  Trustee  shall have  sufficient
income or proceeds from the Lessor's  Estate to the extent included in the Trust
Indenture  Estate (and such other  amounts) to enable the  Indenture  Trustee to
make  distributions  of the  amounts  due in  respect  of  the  Certificates  in
accordance with the terms hereof and thereof. Each Holder by its acceptance of a
Certificate  agrees that it will look solely to the income and proceeds from the
Trust Indenture  Estate (and such other amounts of the type described in Section
5.01 hereof but only to the extent actually  received by the Indenture  Trustee)
to the extent  available  for  distribution  to it as  provided  herein and that
neither the Owner Participant, nor the Owner Trustee, nor SSB, nor the Indenture
Trustee is personally  liable to such Holder for any amounts  payable under this
Indenture or such  Certificate or for any amounts payable or liability under any
Certificate or this Indenture,  except as expressly  provided herein in the case
of SSB, the Owner Trustee or the Indenture Trustee.

         SSB is not  personally  liable to any  Holder,  the  Lessee,  the Owner
Participant  or the  Indenture  Trustee  for  any  amounts  payable  under  this
Indenture or for any liability under this Indenture or the Certificates,  except
as a result of SSB's gross  negligence  or willful  misconduct,  or as otherwise
expressly provided herein or in the Participation Agreement.

         If (1) all or any part of the Lessor's Estate becomes the property of a
debtor  subject to the  reorganization  provisions of the  Bankruptcy  Code, (2)
pursuant to such reorganization provisions any Owner Participant is required, by
reason of such Owner  Participant  being held to have recourse  liability to the
debtor or the trustee of the debtor  directly or indirectly,  to make payment on
account of any amount payable as principal of or interest, Make-Whole Premium or
other  amounts  payable  on the  Certificates,  and  (3) the  Indenture  Trustee
actually  receives  any Recourse  Amount which  reflects any payment by an Owner
Participant on account of (2) above,  then the Indenture  Trustee shall promptly
refund to such Owner Participant such Recourse Amount. Nothing contained in this
paragraph  shall  prevent the  Indenture  Trustee  from  enforcing  any personal
recourse   obligation  (and  retaining  the  proceeds   thereof)  of  any  Owner
Participant under the Participation Agreement, or from retaining any amount paid
by any Owner Participant under Sections 5.01, 8.02 and 8.03 hereof.

         Section  2.06.  Registration.  Transfer  and  Exchange.  The  Indenture
Trustee will keep, on behalf of the Owner  Trustee,  at each office or agency to
be  maintained  for the purpose as provided in Section 3.02 hereof a Register or
Registers on which, subject to such reasonable  regulations as it may prescribe,
it will register, and will register the transfer of, Certificates as provided in
this Article.  Such Register shall be in written form in the English language or
in any other form capable of being  converted into such form within a reasonable
period of time.

         Upon due  presentation  for registration of transfer of any Certificate
at any such office or agency,  the Owner Trustee shall execute and the Indenture
Trustee  shall  authenticate  and  deliver  in the  name  of the  transferee  or
transferees a new  Certificate or  Certificates of the same Series and Maturity,
principal amount and interest rate and in authorized  denominations for an equal
aggregate  principal amount;  provided,  that such Certificate being transferred
shall be canceled in accordance with Section 2.08 hereof simultaneously with the
issuance of the new Certificate.

         Any Certificate or  Certificates  may be exchanged for a Certificate or
Certificates  of the same Series and  Maturity  and  interest  rate but in other
authorized denominations,  in an equal aggregate principal amount.  Certificates
to be exchanged shall be surrendered at any office or agency to be maintained by
the  Indenture  Trustee for the purpose as provided in Section 3.02 hereof,  and
the Owner Trustee shall execute and the Indenture Trustee shall authenticate and
deliver in exchange  therefor the Certificate or  Certificates  which the Holder
making  the  exchange  shall  be  entitled  to  receive,   bearing  numbers  not
contemporaneously or previously outstanding.

         All  Certificates  presented for  registration  of transfer,  exchange,
prepayment  or  payment  shall  (if so  required  by the  Owner  Trustee  or the
Indenture  Trustee)  be  duly  endorsed  by,  or  be  accompanied  by a  written
instrument or instruments of transfer in form  satisfactory to the Owner Trustee
and the  Indenture  Trustee  duly  executed by the Holder or its  attorney  duly
authorized  in writing and (except in the case of transfers  pursuant to Article
15 of the  Participation  Agreement) the Indenture  Trustee may require evidence
satisfactory to it as to the compliance of any such transfer with the Securities
Act.

         The  Indenture  Trustee  may require  payment  from the Holder of a sum
sufficient to cover any tax or other governmental  charge that may be imposed in
connection  with any exchange or registration  of transfer of  Certificates.  No
service charge shall be levied for any such transaction.

         The  Indenture  Trustee shall not be required to exchange or register a
transfer of any Certificates  (a) for a period of 15 days immediately  preceding
the first  mailing  of notice of  prepayment  of such  Certificates  or (b) with
respect to which notice of  prepayment  has been given  pursuant to Section 6.03
hereof and such notice has not been revoked.

         All  Certificates  issued upon any transfer or exchange of Certificates
shall be valid  obligations of the Owner Trustee,  evidencing the same debt, and
entitled  to the  same  security  and  benefits  under  this  Indenture,  as the
Certificates surrendered upon such transfer or exchange.

         Section  2.07.   Mutilated.   Defaced,   Destroyed,   Lost  and  Stolen
Certificates.  In case any  temporary  or  definitive  Certificate  shall become
mutilated, defaced or be apparently destroyed, lost or stolen, the Owner Trustee
in its  discretion  may  execute,  and upon the oral or  written  request of any
officer of SSB,  principal  amount and interest  rate as the  Certificate  being
replaced,  bearing a number not contemporaneously or previously outstanding,  in
exchange and substitution for the mutilated or defaced  Certificate,  or in lieu
of and substitution for the Certificate so apparently destroyed, lost or stolen.
In the case of any  Certificate  so apparently  destroyed,  lost or stolen,  the
applicant for a substitute Certificate shall furnish to the Owner Trustee and to
the  Indenture  Trustee such security or indemnity as may be required by them to
indemnify  and defend and to hold each of them  harmless  and  evidence to their
satisfaction of the apparent destruction,  loss or theft of such Certificate and
of the ownership thereof.

         Upon the issuance of any substitute  Certificate,  the Owner Trustee or
the Indenture Trustee may require payment from the Holder of a sum sufficient to
cover any tax or other  governmental  charge  that may be  imposed  in  relation
thereto and any other reasonable expenses incurred in connection  therewith.  In
case any Certificate which has matured or is about to mature, or has been called
for  prepayment  in full,  shall become  mutilated  or defaced or be  apparently
destroyed,  lost or  stolen,  the  Owner  Trustee  may,  instead  of  issuing  a
substitute  Certificate,  pay or  authorize  the  payment  of the same  (without
surrender thereof except in the case of a mutilated or defaced Certificate),  if
the applicant of any Certificate so apparently  destroyed,  lost or stolen,  for
such payment shall  furnish to the Owner  Trustee and to the  Indenture  Trustee
such  security  or  indemnity  as any of them may  require  to hold each of them
harmless  and the  applicant  shall also  furnish to the Owner  Trustee  and the
Indenture  Trustee evidence to their  satisfaction of the apparent  destruction,
loss or theft of such Certificate and of the ownership thereof.

         Every substitute  Certificate issued pursuant to the provisions of this
Section by virtue of the fact that any Certificate is apparently destroyed, lost
or stolen shall constitute an original additional  contractual obligation of the
Owner  Trustee,  whether  or  not  the  apparently  destroyed,  lost  or  stolen
Certificate  shall be enforceable at any time by anyone and shall be entitled to
all the security and benefits of (but shall be subject to all the limitations of
rights set forth in) this Indenture equally and proportionately with any and all
other Certificates duly authenticated and delivered hereunder.  All Certificates
shall be held and owned upon the express condition that, to the extent permitted
by law, the foregoing  provisions are exclusive with respect to the  replacement
or  payment of  mutilated,  defaced,  or  apparently  destroyed,  lost or stolen
Certificates   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 of negotiable  instruments or other
securities without their surrender.

         Section 2.08.  Cancellation of Certificates:  Destruction  Thereof. All
Certificates  surrendered for payment,  prepayment,  registration of transfer or
exchange,  if surrendered to the Owner Trustee or any agent of the Owner Trustee
or the  Indenture  Trustee,  shall be  delivered  to the  Indenture  Trustee for
cancellation or, if surrendered to the Indenture  Trustee,  shall be canceled by
it; and no  Certificates  shall be issued in lieu  thereof  except as  expressly
permitted by any of the  provisions of this  Indenture.  The  Indenture  Trustee
shall destroy  cancelled  Certificates  held by it and deliver a certificate  of
destruction to the Owner Trustee.  If the Owner Trustee shall acquire any of the
Certificates, such acquisition shall not operate as a prepayment or satisfaction
of the indebtedness  represented by such Certificates  unless and until the same
are delivered to the Indenture Trustee for cancellation.

         Section  2.09.  Temporary  Certificates.  Pending  the  preparation  of
definitive  Certificates,  the Owner  Trustee may execute and,  upon the oral or
written request of an officer of SSB, the Indenture  Trustee shall  authenticate
and  deliver  temporary  Certificates  (printed,  lithographed,  typewritten  or
otherwise  reproduced,  in  each  case  in form  satisfactory  to the  Indenture
Trustee).  Temporary  Certificates shall be issuable as registered  Certificates
without coupons, of any authorized  denomination,  and substantially in the form
of  the  definitive  Certificates  but  with  such  omissions,   insertions  and
variations  as may be  appropriate  for  temporary  Certificates,  all as may be
determined by the Owner Trustee with the  concurrence of the Indenture  Trustee.
Temporary  Certificates  may contain such  reference to any  provisions  of this
Indenture as may be appropriate.  Every temporary  Certificate shall be executed
by the Owner  Trustee  and,  upon the oral or written  request of an  authorized
officer of the Owner Trustee, be authenticated by the Indenture Trustee upon the
same conditions and in substantially  the same manner,  and with like effect, as
the definitive Certificates.  Without unreasonable delay the Owner Trustee shall
execute  and shall  furnish  definitive  Certificates  and  thereupon  temporary
Certificates  shall be  surrendered in exchange  therefor  without charge at any
office or agency to be  maintained  by the  Indenture  Trustee  for the  purpose
pursuant to Section 3.02  hereof,  and,  upon the oral or written  request of an
authorized   officer  of  the  Owner  Trustee,   the  Indenture   Trustee  shall
authenticate  and deliver in exchange for such temporary  Certificates  an equal
aggregate  principal  amount of definitive  Certificates  of the same Series and
Maturities  and  interest  rates  and  in  authorized  denominations.  Until  so
exchanged,  temporary  Certificates  shall be entitled to the same  security and
benefits under this Indenture as definitive Certificates.

         Section 2.10.  Termination  of Interest in Trust  Indenture  Estate.  A
Holder  shall not, as such,  have any further  interest  in, or other right with
respect to, the Trust Indenture  Estate when and if the principal  amount of and
Make-Whole  Premium,  if any,  and  interest on and other  amounts due under all
Certificates  held by such  Holder  and all other sums  payable  to such  Holder
hereunder and under the other Operative Agreements shall have been paid in full.

         Section 2.11. Certificates in Respect of Replacement Aircraft. Upon the
execution and delivery of a supplement to this Indenture  covering a Replacement
Airframe and/or  Replacement  Engine,  as provided in Section 9.09 hereof,  each
Certificate  shall be  deemed  to have  been  issued  in  connection  with  such
Replacement Airframe and/or Replacement Engine and (in the case of a Replacement
Airframe) each Certificate  issued thereafter upon a transfer or exchange of, or
as a replacement  for, a Certificate,  shall be designated as having been issued
in  connection  with such  Replacement  Airframe,  but without any other  change
therein except as provided for in this Article II.

         Section 2.12.  Assumption of Obligations  Under  Certificates and Other
Operative Agreements.  If, in accordance with and subject to the satisfaction of
the conditions  set forth in Section 7.11 of the  Participation  Agreement,  the
Lessee shall assume all of the obligations of the Owner Trustee hereunder, under
the  Certificates,   and  under  all  other  Operative  Agreements,   the  Owner
Participant  and the Owner  Trustee  shall be released and  discharged  from any
further obligations hereunder and under the Certificates and all other Operative
Agreements (except for any recourse  obligations of the Owner Participant or the
Owner Trustee in its individual  capacity with respect to matters arising out of
events occurring prior to such assumption).

         Section 2.13.  Establishment of Collateral  Account.  (a) The Indenture
Trustee shall, pursuant to the Collateral Account Control Agreement,  establish,
or cause  to be  established,  with  State  Street  Bank and  Trust  Company  of
Connecticut,  National Association, who shall represent and warrant that it is a
financial  intermediary  (as  defined in  Section  8-313(4)  of the  Connecticut
Uniform  Commercial  Code),  in its name as secured party  hereunder an Eligible
Deposit Account entitled "The First National Bank of Maryland,  as secured party
under the Trust Indenture and Security Agreement  (Atlantic Coast Airlines Trust
No.  __________) dated as of September 26, 1997, with the Owner Trustee referred
to therein".

         (b) If at any time the  Collateral  Account  ceases  to be an  Eligible
Deposit Account, the Indenture Trustee shall within two Business Days, establish
a new Collateral  Account meeting the conditions  specified in the definition of
Eligible Deposit Account,  and shall transfer any cash or any investments in the
Collateral Account to such new Collateral Account.

         (c) The Indenture Trustee shall have exclusive  dominion and control of
the Collateral  Account and all funds therein,  and shall make  withdrawals from
the Collateral Account only in accordance with this Indenture.

         (d) The Collateral Account Control Agreement shall require FNBM to send
confirmation  to the  Indenture  Trustee and the Lessee that it has credited the
Specified  Investments to the Collateral Account and to make appropriate entries
on its books  identifying the Specified  Investments as pledged to the Indenture
Trustee.

         Section 2.14. Investment of Funds on Deposit in the Collateral Account.
(a) Funds  deposited in the Collateral  Account shall be invested and reinvested
by the  Indenture  Trustee,  subject  to  Section  17.02  of  the  Participation
Agreement,  at the risk of the Owner Trustee, in Specified  Investments selected
by the Lessee and approved by the Indenture Trustee for the account of the Owner
Trustee in accordance with Section  2.14(b) below;  provided,  however,  that if
Specified  Investments  meeting  the  requirements  of Section  2.14(b)  are not
available  on any day on which funds are to be invested as  contemplated  by the
preceding  provisions of this Section 2.14(a),  the Indenture  Trustee may leave
such funds in the Collateral  Account  uninvested  until the earliest of (i) the
date on which an appropriate  Specified  Investment becomes available,  (ii) the
Delivery Date and (iii) the Cut-Off Date.  The Indenture  Trustee shall maintain
possession of the negotiable instruments or securities,  if any, evidencing such
Specified  Investments  and,  in  the  case  of  any  Specified  Investments  in
book-entry form, such Specified  Investments  shall be credited to an account of
the Indenture Trustee or a financial  intermediary  with the applicable  Federal
Reserve Bank; provided, however, if the Specified Investments are credited to an
account of the financial  intermediary,  the financial  intermediary  shall make
written  confirmation  thereof to the Indenture  Trustee and make an appropriate
entry on its books  identifying  the  Specified  Investments  as  pledged to the
Indenture Trustee.  All proceeds of and any income,  interest and other payments
and  distributions  on or with  respect to any  Specified  Investments  shall be
deposited in or credited to the Collateral Account and thereafter shall be held,
invested and applied by the Indenture Trustee in accordance with this Indenture.
The Indenture  Trustee shall promptly notify the Owner Trustee and the Lessee of
any Losses.

         (b) On the Certificate Closing Date, the Indenture Trustee shall invest
the amount  deposited in the Collateral  Account  pursuant to Section 2.01(c) of
the Participation  Agreement in Specified Investments selected by the Lessee and
approved by the  Indenture  Trustee for the account of the Owner  Trustee  which
mature on or prior to  ___________,  199_.  If the  Delivery  Date is  postponed
pursuant to Section 3.02(c) or Section 3.05 of the Participation  Agreement, the
proceeds of the Specified  Investments referred to in the preceding sentence may
be invested  in  Specified  Investments  which  mature  within 14 days after the
rescheduled  Delivery  Date.  If no Delivery  Date  occurs,  then any  Specified
Investment shall mature no later than the 15th day after the Cut-Off Date.

         (c) If for any reason the  Indenture  Trustee shall be required to make
any  distributions  of the Liquid  Collateral  prior to the maturity date of any
Specified  Investment,  the Indenture Trustee shall cause the same to be sold in
accordance with standard commercial  practices,  and the Lessee, for the account
of the Owner Trustee,  shall forthwith  compensate the Indenture Trustee for any
Losses as provided in Section 17.02(a) of the Participation Agreement.

         (d)  Pursuant  to  Section  17.02(b)  of the  Participation  Agreement,
interest  payable on the  Certificates  during the period in which  funds are on
deposit in the Collateral  Account shall, to the extent  investment  earnings in
the Collateral  Account are  insufficient to fund such interest,  be paid by the
Lessee.

         Section  2.15.  Release  of  Collateral  Account  on  Delivery  Date or
Assumption of  Certificates.  (a) Subject to the  satisfaction  or waiver of the
conditions precedent to the Indenture Trustee's obligations set forth in Section
4.02 of the Participation Agreement, on the Delivery Date or, if applicable, the
date  the  Lessee  assumes  the  obligations  of the  Owner  Trustee  under  the
Certificates  pursuant to Section 3.05(a) of the  Participation  Agreement,  the
Indenture Trustee shall release from the Collateral  Account an amount of Liquid
Collateral,  equal to the  lesser  of (A) the Debt  Portion  and (B) the  amount
actually  in the  Collateral  Account  on the  Delivery  Date.  Such  amount  so
released,  together  with the  amount of any  Losses  received  from the  Lessee
pursuant to Section 17.02(a) of the  Participation  Agreement,  shall be used to
finance a portion of the Purchase Price as  contemplated  by Section  3.02(a) or
Section 3.05(a), as the case may be, of the Participation  Agreement. Any amount
remaining in the Collateral Account after such release (net of any uncompensated
Losses)  shall be  remitted  by the  Indenture  Trustee  on  behalf of the Owner
Trustee  to the  Lessee  pursuant  to Section  3.02(a)(C)  of the  Participation
Agreement.

         (b) The Lien of this Indenture on the Collateral Account and the Liquid
Collateral  shall  terminate on (i) the Delivery Date  following the transfer of
amounts described in Section 3.02(a) or Section 3.05(a),  as the case may be, of
the  Participation  Agreement,   (ii)  the  assumption  by  the  Lessee  of  the
obligations  of the Owner  Trustee  under the  Certificates  pursuant to Section
3.05(a)  of  the  Participation   Agreement  or  (iii)  the  prepayment  of  the
Certificates pursuant to Section 3.05(b) of the Participation Agreement.

         Section 2.16.  Cut-Off Date. In the case of a prepayment  under Section
6.02(a)(vi)  hereof,  the Indenture  Trustee  shall release from the  Collateral
Account all amounts held in the Collateral  Account on such date. Such amount so
released,  together  with the  amount of any  Losses  received  from the  Lessee
pursuant to Sections  17.02(a) and 17.02(c) of the  Participation  Agreement not
then  deposited in the Collateral  Account,  shall be applied to pay amounts due
under Section  6.02(b)(1) hereof on the 15th day following the Cut-Off Date, and
any amount (net of any  uncompensated  Losses)  remaining after such release and
application shall be remitted by the Indenture  Trustee,  on behalf of the Owner
Trustee, to the Lessee.

         Section 2.17.  Subordination.  (a) The Owner Trustee and, by acceptance
of its Certificates of any Series, each Holder of such Series, hereby agree that
no  payment  or  distribution  shall  be made on or in  respect  of the  Secured
Obligations  owed to such  Certificate  Holder  of such  Series,  including  any
payment or distribution of cash,  property or securities  after the commencement
of a proceeding  of the type referred to in clause (v), (vi) or (vii) of Section
7.01 hereof, except as expressly provided in Article V hereof.

         (b) By the  acceptance  of its  Certificates  of any Series (other than
Series A), each Holder of such Series agrees that in the event that such Holder,
in its capacity as a Holder,  shall receive any payment or  distribution  on any
Secured  Obligations  in  respect of such  Series  which it is not  entitled  to
receive under this Section 2.17 or Article V hereof,  it will hold any amount so
received in trust for the Senior Holder (as defined in Section  2.17(c)  hereof)
and will forthwith  turn over such payment to the Indenture  Trustee in the form
received to be applied as provided in Article V hereof.

         (c) As used in this Section 2.17, the term "Senior  Holder" shall mean,
(i) the  Holders  of Series A  Certificates  until the  Secured  Obligations  in
respect of Series A Certificates  have been paid in full, (ii) after the Secured
Obligations  in respect  of Series A  Certificates  have been paid in full,  the
Holders of Series B  Certificates  until the Secured  Obligations  in respect of
Series  B  Certificates  have  been  paid  in  full,  (iii)  after  the  Secured
Obligations  in respect  of Series B  Certificates  have been paid in full,  the
Holders of Series C  Certificates  until the Secured  Obligations  in respect of
Series C  Certificates  have  been  paid in full,  and (iv)  after  the  Secured
Obligations  in respect  of Series C  Certificates  have been paid in full,  the
Holders of Series D  Certificates  until the Secured  Obligations  in respect of
Series D Certificates have been paid in full.

         Section 2.18.  Reoptimization.  The Owner Trustee shall have the right,
on the Initial  Reoptimization  Date and the Reoptimization  Date, to modify the
schedule  of  principal  payments of the  Certificates  subject to the terms and
conditions set forth in Section 2.03(b) or Section 15.02, as applicable,  of the
Participation  Agreement.  To give effect to the foregoing the Indenture Trustee
shall execute an amendment to this Indenture  which shall amend Section 6.06 and
Schedule  II hereof to set forth the new  schedule  of  principal  payments  and
Schedule I to each  Certificate  shall be  amended  accordingly.  The  Indenture
Trustee shall deliver such  amendments to the  Subordination  Agent on behalf of
the Pass Through Trustee for each of the Pass Through Trusts. To the extent that
such  amendment of this  Indenture  occurs later than the  Delivery  Date,  this
Indenture,  as amended,  shall, if required,  be duly filed for recordation with
the Aeronautics Authority.


                                   ARTICLE III

                                    COVENANTS

         Section 3.01.  Payment of Principal.  Make-Whole  Premium and Interest.
The Owner  Trustee  covenants  and agrees that it will,  subject to Section 2.05
hereof,  duly and  punctually  pay or cause to be paid  the  principal  of,  and
interest and Make-Whole  Premium,  if any, and all other amounts due on, each of
the  Certificates  and  under  this  Indenture  at the place or  places,  at the
respective  times  and in the  manner  provided  in  this  Indenture  and in the
Certificates.

         Principal  and  interest and other  amounts due  hereunder or under the
Certificates  shall  be  payable  in  dollars  on the due date  thereof,  to the
Indenture  Trustee at the Corporate  Trust  Department (or such other account at
such other financial  institution as the Indenture Trustee may designate for the
purpose).  If any amount payable under the  Certificates or under this Indenture
falls due on a day which is not a Business  Day,  then such sum shall be payable
on the next succeeding  Business Day, without  (provided that payment is made on
such next succeeding Business Day) additional interest thereon for the period of
such extension.

         Section  3.02.  Offices  for  Payments,  etc.  So  long  as  any of the
Certificates  remain  outstanding,  the  Indenture  Trustee  will  maintain  the
following:  (a) an office or agency where the  Certificates may be presented for
payment and (b) a facility or agency where the Certificates may be presented for
registration of transfer and for exchange and for prepayment as provided in this
Indenture  (the   "Registrar").   The  Registrar  shall  keep  a  register  (the
"Register")  with respect to the  Certificates  and their transfer and exchange.
The Indenture  Trustee may appoint one or more  co-registrars  ("Co-Registrars")
for the  Certificates  and may terminate any such  appointment  at any time upon
written notice. The term "Registrar" includes any Co-Registrar.

         The Indenture Trustee shall initially act as Registrar.

         Section  3.03.  Appointment  to Fill a Vacancy  in Office of  Indenture
Trustee. The Owner Trustee, whenever necessary to avoid or fill a vacancy in the
office of Indenture Trustee,  will, with the consent of the Lessee,  appoint, in
the manner provided in Section 12.02 hereof, an Indenture Trustee, so that there
shall at all times be an Indenture Trustee hereunder.

         Section 3.04. Paying Agents. Whenever the Indenture Trustee in its sole
discretion shall appoint a paying agent (the "Paying Agent"),  it will cause the
Paying  Agent to execute and  deliver an  instrument  in which the Paying  Agent
shall  agree  with the  Indenture  Trustee,  subject to the  provisions  of this
Section:

                  (a) that it will hold all sums  received  by it as such  agent
         for the  payment of the  principal  of,  and  interest  and  Make-Whole
         Premium, if any, on the Certificates  (whether such sums have been paid
         to it by the Indenture  Trustee or the Owner  Trustee) in trust for the
         benefit of the Holders or of the Indenture Trustee, and

                  (b) that it will  give the  Indenture  Trustee  notice  of any
         failure by the Owner Trustee to make any payment of the principal of or
         interest or Make-Whole  Premium,  if any, on the Certificates  when the
         same shall be due and payable.

         Anything  in  this  Section  to  the  contrary   notwithstanding,   the
agreements  to hold sums in trust as provided in this Section are subject to the
provisions of Sections 14.03 and 14.04 hereof.

         Section 3.05.     Covenants of SSB and the Owner Trustee.

         (a)      SSB hereby  covenants  and agrees to perform  its  covenants  set forth in  Sections  7.04(b) and
7.04(c) of the Participation Agreement.

         (b) The Owner Trustee hereby covenants and agrees as follows:

                  (i) in the event a  Responsible  Officer of the Owner  Trustee
         shall have  actual  knowledge  of an  Indenture  Event of  Default,  an
         Indenture  Default  or an Event of Loss,  the Owner  Trustee  will give
         prompt  written notice of such  Indenture  Event of Default,  Indenture
         Default or Event of Loss to the Indenture  Trustee,  the Lessee and the
         Owner Participant;

                  (ii) the Owner Trustee will furnish to the Indenture  Trustee,
         promptly  upon receipt  thereof,  duplicates  or copies of all reports,
         notices,  requests,  demands,  certificates,  financial  statements and
         other  instruments  furnished  to the Owner  Trustee  under the  Lease,
         including,  without limitation, a copy of each report or notice from an
         insurer or an insurance  broker received  pursuant to Section 12 of the
         Lease, to the extent that the same shall not have been furnished to the
         Indenture Trustee;

                  (iii) the Owner  Trustee  will not enter into any  business or
         other  activity  other than the  business of owning the  Aircraft,  the
         leasing thereof to the Lessee and the carrying out of the  transactions
         contemplated hereby and by the Lease, the Participation  Agreement, the
         Trust Agreement and the other Indenture Documents; and

                  (iv) except as contemplated by the Operative  Agreements,  the
         Owner Trustee will not contract for, create,  incur or assume any debt,
         and will not  guarantee  (directly or  indirectly  or by an  instrument
         having the effect of assuring  another's  payment or performance on any
         obligation  or  capability  of so  doing,  or  otherwise),  endorse  or
         otherwise  take  action  to become  contingently  liable,  directly  or
         indirectly, in connection with the debt of any other Person.

         Section 3.06.     [Reserved]

         Section 3.07.  Disposal of Trust Indenture Estate. At any time and from
time to time any part of the Trust  Indenture  Estate may be sold or disposed of
in accordance with the provisions of this Indenture and the Lease. The Indenture
Trustee shall, from time to time, release any part of the Trust Indenture Estate
so sold or  disposed  of or as to which an Event of Loss has  occurred  or as to
which  the  Lease  has  been  terminated  from the  Lien of this  Indenture.  In
addition,  to the extent that such property  constitutes  an Airframe or Engine,
the further requirements of Section 9.08 hereof shall be complied with.

         Section  3.08.  No  Representations  or  Warranties  as to  Aircraft or
Documents.  NEITHER THE INDENTURE  TRUSTEE NOR THE OWNER TRUSTEE NOR SSB NOR THE
OWNER  PARTICIPANT  MAKES OR SHALL BE DEEMED TO HAVE MADE ANY  REPRESENTATION OR
WARRANTY,  EXPRESS  OR  IMPLIED,  AS TO THE TITLE,  AIRWORTHINESS,  WORKMANSHIP,
VALUE,  CONDITION,  DESIGN,  COMPLIANCE WITH SPECIFICATIONS,  MERCHANTABILITY OR
FITNESS FOR ANY PARTICULAR  USE OR PURPOSE OF THE AIRCRAFT OR ANY ENGINE,  AS TO
THE ABSENCE OF ANY INFRINGEMENT OF ANY PATENT, TRADEMARK OR COPYRIGHT, AS TO THE
ABSENCE  OF  OBLIGATIONS  BASED  ON  STRICT  LIABILITY  IN  TORT  OR  ANY  OTHER
REPRESENTATION   OR  WARRANTY  WITH  RESPECT  TO  THE  AIRCRAFT  OR  ANY  ENGINE
WHATSOEVER,  except that SSB warrants  that on the  Delivery  Date (a) the Owner
Trustee shall have received whatever title was conveyed to it by the Seller, and
(b) the Aircraft shall be free and clear of Lessor's Liens  attributable to SSB.
Neither SSB nor the Indenture  Trustee makes or shall be deemed to have made any
representation  or warranty as to the validity,  legality or  enforceability  of
this Indenture,  the Trust Agreement, the Certificates or any Indenture Document
or as to the correctness of any statement  contained in any thereof,  except for
the  representations  and warranties of SSB and the Indenture Trustee made under
this  Indenture or in the  Participation  Agreement or of the Owner  Participant
made under the Participation Agreement.

         Section 3.09.     Further Assurances:  Financing  Statements.  At any time and from time to time, upon the
request of the Indenture  Trustee or the Lessee,  at the expense of the Lessee,  the Owner  Trustee shall  promptly
and duly  execute and deliver any and all such  further  instruments  and  documents  as may be  specified  in such
request and as are  necessary  or advisable to perfect,  preserve or protect the Liens and  assignments  created or
intended to be created hereby,  or to obtain for the Indenture  Trustee the full benefit of the specific rights and
powers  granted  herein,  including,  without  limitation,  the execution and delivery of Uniform  Commercial  Code
financing  statements and continuation  statements with respect  thereto,  or similar  instruments  relating to the
perfection of the Liens or assignments created or intended to be created hereby.


                                   ARTICLE IV

                                  HOLDER LISTS

         Section  4.01.  Holder  Lists:  Ownership  of  Certificates.   (a)  The
Indenture  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
the Holders. If the Indenture Trustee is not the Registrar,  the Registrar shall
furnish to the Indenture Trustee semi-annually not more than ten days after each
Record  Date,  as of such Record Date,  or at such other times as the  Indenture
Trustee may request in writing,  a list, in such form and as of such date as the
Indenture Trustee may reasonably require,  containing all the information in the
possession  or control of the  Registrar  as to the names and  addresses  of the
Holders and the amounts and Maturities of the Certificates held by such Holders.

         (b)      Ownership of the Certificates shall be proved by the Register kept by the Registrar.


                                    ARTICLE V

                    RECEIPT, DISTRIBUTION AND APPLICATION OF
                     INCOME FROM THE TRUST INDENTURE ESTATE


         Section 5.01. Basic Rent Distribution.  Except as otherwise provided in
Section 5.03 hereof,  each installment of Basic Rent, any payment of interest on
overdue  installments  of Basic  Rent,  any payment  received  by the  Indenture
Trustee  pursuant  to Section  8.03(a)  hereof and any  payment  received by the
Indenture Trustee pursuant to Section 17.02(b) (including any amount received by
the  Indenture  Trustee  pursuant to a draw on the Letter of Credit  pursuant to
such Section 17.02(b) and Section 5.10 hereof) or 17.02(c) of the  Participation
Agreement  shall be distributed by the Indenture  Trustee no later than the time
herein provided in the following order of priority:

first,   (i) so much of such  installment or payment as shall be required to pay
         in full the  aggregate  amount of the payment or payments of  Principal
         Amount and interest  and other  amounts (as well as any interest on any
         overdue  Principal  Amount and, to the extent  permitted by  applicable
         law, on any overdue  interest and any other  overdue  amounts) then due
         under all Series A Certificates  shall be distributed to the Holders of
         Series A Certificates ratably,  without priority of one over the other,
         in the proportion  that the amount of such payment or payments then due
         under each Series A Certificate  bears to the  aggregate  amount of the
         payments then due under all Series A Certificates;

                  (ii) after giving  effect to paragraph  (i) above,  so much of
         such  installment  or payment as shall be  required  to pay in full the
         aggregate  amount of the payment or payments  of  Principal  Amount and
         interest  and other  amounts  (as well as any  interest  on any overdue
         Principal Amount and, to the extent permitted by applicable law, on any
         overdue  interest  and any other  overdue  amounts)  then due under all
         Series B  Certificates  shall be distributed to the Holders of Series B
         Certificates  ratably,  without  priority of one over the other, in the
         proportion  that the amount of such payment or payments  then due under
         each Series B Certificate bears to the aggregate amount of the payments
         then due under all Series B Certificates;

                  (iii) after giving effect to paragraph (ii) above,  so much of
         such  installment  or payment as shall be  required  to pay in full the
         aggregate  amount of the payment or payments  of  Principal  Amount and
         interest  and other  amounts  (as well as any  interest  on any overdue
         Principal Amount and, to the extent permitted by applicable law, on any
         overdue  interest  and any other  overdue  amounts)  then due under all
         Series C  Certificates  shall be distributed to the Holders of Series C
         Certificates  ratably,  without  priority of one over the other, in the
         proportion  that the amount of such payment or payments  then due under
         each Series C Certificate bears to the aggregate amount of the payments
         then due under all Series C Certificates; and

                  (iv) after giving effect to paragraph  (iii) above, so much of
         such  installment  or payment as shall be  required  to pay in full the
         aggregate  amount of the payment or payments  of  Principal  Amount and
         interest  and other  amounts  (as well as any  interest  on any overdue
         Principal Amount and, to the extent permitted by applicable law, on any
         overdue  interest  and any other  overdue  amounts)  then due under all
         Series D  Certificates  shall be distributed to the Holders of Series D
         Certificates  ratably,  without  priority of one over the other, in the
         proportion  that the amount of such payment or payments  then due under
         each Series D Certificate bears to the aggregate amount of the payments
         then due under all Series D Certificates; and

second,  the balance if any of such installment or payment remaining  thereafter
         shall be distributed to the Owner Trustee,  or as the Owner Trustee may
         request, for distribution pursuant to the Trust Agreement.

         Section 5.02. Event of Loss and Replacement;  Prepayment. (a) Except as
otherwise provided in Section 5.03 hereof, any payment received by the Indenture
Trustee  as the  result  of an  Event  of  Loss  with  respect  to the  Aircraft
(including  pursuant to Section 11(a)(2) of the Lease,  but, in the case of such
Section 11(a)(2), subject to the time limits specified therein) or as the result
of, or in connection with any event under the Lease giving rise to, a prepayment
pursuant to Section 6.02 hereof,  shall be promptly distributed by the Indenture
Trustee in the following order of priority:

first,            to reimburse the Indenture  Trustee for any costs or expenses  reasonably  incurred in connection
         with such prepayment,

second,  (i)      to pay the amounts  specified  in  paragraph  (i) of clause  "second" of Section 5.03 hereof then
         due and payable in respect of the Series A Certificates;

                  (ii) after giving  effect to paragraph  (i) above,  to pay the
         amounts  specified in paragraph (ii) of clause "second" of Section 5.03
         hereof then due and payable in respect of the Series B Certificates;

                  (iii) after giving effect to paragraph (ii) above,  to pay the
         amounts specified in paragraph (iii) of clause "second" of Section 5.03
         hereof  then due and  payable in respect of the Series C  Certificates;
         and

                  (iv) after giving effect to paragraph  (iii) above, to pay the
         amounts  specified in paragraph (iv) of clause "second" of Section 5.03
         hereof then due and payable in respect of the Series D Certificates;

         provided,  that payments  pursuant to this clause "second" shall be made without the payment of Make-Whole
         Premium; and

third,   as provided in clause "third" of Section 5.03 hereof;

provided that if a Replacement  Airframe  shall be  substituted  for an Airframe
subject to an Event of Loss as  provided  in Section  11(a)(1)  of the Lease and
Section 9.08 hereof,  any proceeds  which result from such Event of Loss and are
paid to the Indenture  Trustee shall be held by the Indenture Trustee as part of
the Trust Indenture  Estate and, unless  otherwise  applied  pursuant to Section
5.01 or 5.03  hereof,  such  proceeds  shall be  released to the Lessee upon the
release of such damaged Airframe and the replacement thereof as herein provided.

         (b) Any amounts  received  directly or indirectly from any governmental
authority,  insurer or other party pursuant to any provision of Section 11 or 12
of the Lease as the result of loss or damage not  constituting  an Event of Loss
with respect to the Aircraft, or as a result of such loss or damage constituting
an Event of Loss if and to the  extent  that such  amounts  would at the time be
required to be paid to the Lessee  pursuant to Section 11 or 12 but for the fact
that a  Specified  Default  exists  shall be held by the  Indenture  Trustee  as
security for the obligations of the Lessee under the Lease and the Participation
Agreement  and shall be invested in  accordance  with the terms of Section  5.08
hereof and at such time as the conditions for payment to the Lessee specified in
Section  11 or 12,  as the case  may be,  shall be  fulfilled  and no  Specified
Default exists, such amount, and the proceeds of any investment thereof,  shall,
to the  extent  not  theretofore  applied,  be paid to the  Lessee to the extent
provided in the Lease.

         Section 5.03. Payment After Indenture Event of Default.  etc. Except as
otherwise  provided in Sections 5.02(b),  5.04(b),  5.04(c) and 5.05 hereof, all
payments  (other  than  Excepted  Payments)  received  and all  amounts  held or
realized by the Indenture Trustee after an Indenture Event of Default shall have
occurred and so long as such an Indenture  Event of Default shall be continuing,
and after the  Certificates  shall have  become due and  payable as  provided in
Section  7.02(b) or (c) hereof,  shall be promptly  distributed by the Indenture
Trustee in the following order of priority:

first,            so much of such payments or amounts as shall be required to reimburse  the Indenture  Trustee for
- -----
                  any tax,  expense,  charge or other  loss  (including,  without  limitation,  all  amounts  to be
                  expended at the expense of, or charged  upon the tolls,  rents,  revenues,  issues,  products and
                  profits of, the  property  included in the Trust  Indenture  Estate  pursuant to Section  7.03(b)
                  hereof) incurred by the Indenture Trustee (to the extent not previously  reimbursed)  (including,
                  without  limitation,  the expenses of any sale, taking or other  proceeding,  attorneys' fees and
                  expenses,  court costs, and any other  expenditures  incurred or expenditures or advances made by
                  the Indenture  Trustee or the Holders in the  protection,  exercise or  enforcement of any right,
                  power or remedy or any damages sustained by the Indenture  Trustee or the Holders,  liquidated or
                  otherwise,  upon such Indenture  Event of Default)  shall be applied by the Indenture  Trustee as
                  between itself and the Holders in reimbursement of such expenses;

second,           (i)      so much of such  payments or amounts  remaining  as shall be required to pay in full the
- ------
                  aggregate  unpaid  Principal  Amount of all Series A  Certificates,  and the  accrued  but unpaid
                  interest and other amounts due thereon and all other Secured  Obligations  (other than Make-Whole
                  Premium)  in  respect  of the  Series  A  Certificates  to the  date of  distribution,  shall  be
                  distributed to the Holders of Series A  Certificates,  and in case the aggregate  amount so to be
                  distributed  shall be insufficient to pay in full as aforesaid,  then ratably,  without  priority
                  of one over the other,  in the  proportion  that the  aggregate  unpaid  Principal  Amount of all
                  Series A  Certificates  held by each  Holder  plus the  accrued  but  unpaid  interest  and other
                  amounts  due  hereunder  or  thereunder   (other  than   Make-Whole   Premium)  to  the  date  of
                  distribution,  bears to the aggregate unpaid  Principal Amount of all Series A Certificates  held
                  by all such Holders plus the accrued but unpaid  interest  and other  amounts due thereon  (other
                  than Make-Whole Premium) to the date of distribution;

                  (ii) after giving  effect to paragraph  (i) above,  so much of
                  such payments or amounts remaining as shall be required to pay
                  in full the aggregate  unpaid Principal Amount of all Series B
                  Certificates,  and the accrued but unpaid  interest  and other
                  amounts due thereon and all other Secured  Obligations  (other
                  than   Make-Whole   Premium)   in  respect  of  the  Series  B
                  Certificates to the date of distribution, shall be distributed
                  to the  Holders  of  Series  B  Certificates,  and in case the
                  aggregate amount so to be distributed shall be insufficient to
                  pay in full as aforesaid,  then ratably,  without  priority of
                  one over  the  other,  in the  proportion  that the  aggregate
                  unpaid Principal  Amount of all Series B Certificates  held by
                  each Holder plus the  accrued  but unpaid  interest  and other
                  amounts due  hereunder or  thereunder  (other than  Make-Whole
                  Premium) to the date of  distribution,  bears to the aggregate
                  unpaid Principal  Amount of all Series B Certificates  held by
                  all such  Holders  plus the  accrued but unpaid  interest  and
                  other amounts due thereon (other than  Make-Whole  Premium) to
                  the date of distribution;

                  (iii) after giving effect to paragraph (ii) above,  so much of
                  such payments or amounts remaining as shall be required to pay
                  in full the aggregate  unpaid Principal Amount of all Series C
                  Certificates,  and the accrued but unpaid  interest  and other
                  amounts due thereon and all other Secured  Obligations  (other
                  than   Make-Whole   Premium)   in  respect  of  the  Series  C
                  Certificates to the date of distribution, shall be distributed
                  to the  Holders  of  Series  C  Certificates,  and in case the
                  aggregate amount so to be distributed shall be insufficient to
                  pay in full as aforesaid,  then ratably,  without  priority of
                  one over  the  other,  in the  proportion  that the  aggregate
                  unpaid Principal  Amount of all Series C Certificates  held by
                  each Holder plus the  accrued  but unpaid  interest  and other
                  amounts due  hereunder or  thereunder  (other than  Make-Whole
                  Premium) to the date of  distribution,  bears to the aggregate
                  unpaid Principal  Amount of all Series C Certificates  held by
                  all such  Holders  plus the  accrued but unpaid  interest  and
                  other amounts due thereon (other than  Make-Whole  Premium) to
                  the date of distribution; and

                  (iv) after giving effect to paragraph  (iii) above, so much of
                  such payments or amounts remaining as shall be required to pay
                  in full the aggregate  unpaid Principal Amount of all Series D
                  Certificates,  and the accrued but unpaid  interest  and other
                  amounts due thereon and all other Secured  Obligations  (other
                  than   Make-Whole   Premium)   in  respect  of  the  Series  D
                  Certificates to the date of distribution, shall be distributed
                  to the  Holders  of  Series  D  Certificates,  and in case the
                  aggregate amount so to be distributed shall be insufficient to
                  pay in full as aforesaid,  then ratably,  without  priority of
                  one over  the  other,  in the  proportion  that the  aggregate
                  unpaid Principal  Amount of all Series D Certificates  held by
                  each Holder plus the  accrued  but unpaid  interest  and other
                  amounts due  hereunder or  thereunder  (other than  Make-Whole
                  Premium) to the date of  distribution,  bears to the aggregate
                  unpaid Principal  Amount of all Series D Certificates  held by
                  all such  Holders  plus the  accrued but unpaid  interest  and
                  other amounts due thereon (other than  Make-Whole  Premium) to
                  the date of distribution;

                  (it being  understood  that amounts  payable under this clause
                  "second" shall not in any event include  Make-Whole  Premium);
                  and

third,            the  balance,  if any of such  payments  or amounts  remaining
                  thereafter  shall be  distributed  to the  Owner  Trustee  for
                  distribution pursuant to the Trust Agreement.

         Section 5.04.     Certain  Payments.  (a) Except as  otherwise  provided in this  Indenture,  any payments
received  by the  Indenture  Trustee  which  are to be held or  applied  according  to any  provision  in any other
Indenture Document shall be held or applied thereunder in accordance therewith.

         (b) The Indenture Trustee will distribute,  promptly upon receipt,  any
indemnity or other  payment  received by it from the Owner Trustee or the Lessee
in respect of (i) the Indenture  Trustee in its  individual  capacity,  (ii) the
Subordination  Agent, (iii) each Liquidity  Provider,  and (iv) the Pass-Through
Trustee,  in each case whether  pursuant to Article 8 or 9 of the  Participation
Agreement or as Supplemental Rent, directly to the Person (which may include the
Indenture  Trustee)  entitled  thereto.  Any payment  received by the  Indenture
Trustee  under  clause  (b) of the  last  paragraph  of  Section  2.04  shall be
distributed to the Subordination  Agent to be distributed in accordance with the
terms of the Intercreditor Agreement.

         (c) Notwithstanding anything to the contrary contained herein, any sums
received by the Indenture  Trustee which constitute  Excepted  Payments shall be
distributed  promptly  upon  receipt by the  Indenture  Trustee  directly to the
Person or Persons entitled thereto.

         Section 5.05.  Other Payments.  Any payments  received by the Indenture
Trustee for which no provision as to the  application  thereof is made elsewhere
in this Indenture or in any other Indenture Document shall be distributed by the
Indenture  Trustee  (a) to the extent  received or realized at any time prior to
the payment in full of all obligations to the Holders,  in the order of priority
specified in Section 5.01 hereof,  and (b) to the extent received or realized at
any  time  after  payment  in full of all  obligations  to the  Holders,  in the
following order of priority:

first,            in the manner provided in clause "first" of Section 5.03 hereof, and
- -----                                               -----

second,  in the manner provided in clause "third" of Section 5.03 hereof.

         Section  5.06.  Payments  to Owner  Trustee.  Any  amounts  distributed
hereunder by the  Indenture  Trustee to the Owner  Trustee  shall be paid to the
Owner  Trustee  by wire  transfer  of  immediately  available  funds of the type
received by the Indenture Trustee at such office and to such account or accounts
of such  entity or  entities  as shall be  designated  by notice  from the Owner
Trustee to the Indenture  Trustee from time to time.  The Owner  Trustee  hereby
notifies  the  Indenture  Trustee  that unless and until the  Indenture  Trustee
receives  notice to the  contrary  from the Owner  Trustee,  all  amounts  to be
distributed to the Owner Trustee  hereunder for  distribution in accordance with
the  Trust  Agreement  shall be  distributed  by wire  transfer  of  immediately
available funds of the type received by the Indenture Trustee to such account of
the Owner Participant as may be specified  pursuant to Section 2.06 of the Trust
Agreement.

         Section 5.07.     Application  of Payments.  Each  payment of  principal of and interest or other  amounts
due on each Certificate shall, except as otherwise provided herein, be applied, first, to the payment of interest on 
such Certificate due and payable
                  to the date of such payment,  as provided in such Certificate,
                  as well as any interest on overdue  principal  and  Make-Whole
                  Premium, if any, and, to the extent permitted by law, interest
                  and other amounts due thereunder, second, to the payment of any other amount (other than the principal of such  
                  Certificate)  due hereunder
                  to the Holder of such Certificate or under such Certificate, third, to the  payment  of the  principal  of such  
                  Certificate  if then due  hereunder  or  under  such
- -----
                  Certificate and fourth, the balance,  if any remaining  thereafter,  to the payment of the principal of such 
                  Certificate remaining  unpaid (applied to the  installments of principal amount in the inverse order of their
                  normal maturity)  (provided that such Certificate shall not be subject to prepayment  without the
                  consent of the  affected  Holder  except as permitted by Sections  6.02,  6.06 and 8.02  hereof);
                  provided  that,  solely for the  purpose of  determining  whether an  Indenture  Event of Default
                  shall  have  occurred  and be  continuing,  each  such  payment  shall be deemed  applied  in the
                  following order of priority:  first, in the manner provided in clause "first" above,  second,  in
                                                -----                                    -----
                  the manner  provided in clause "third" above,  third,  in the manner  provided in clause "second"
                                                  -----                                                     ------
                  above and fourth, in the manner provided in clause "fourth" above.
                                                                      ------

         Section 5.08. Investment of Amounts Held by Indenture Trustee.  Amounts
held by the Indenture  Trustee pursuant to Section 5.02(b) hereof or pursuant to
any  provision  of  any  Indenture  Document  providing  for  investment  by the
Indenture Trustee of sums pursuant to Section 11(e) of the Lease or this Section
5.08 shall be invested by the Indenture  Trustee from time to time in securities
selected  by (i) so long as no Event  of  Default  shall  have  occurred  and be
continuing,  the Lessee (and in the absence of written  direction by the Lessee,
the  Indenture  Trustee  shall invest such monies in direct  obligations  of the
United  States of  America)  or (ii) so long as an Event of  Default  shall have
occurred and be continuing,  the Indenture  Trustee and in each case shall be of
the type  meeting the  criteria  for  Permitted  Investments.  Unless  otherwise
expressly  provided in this  Indenture,  any income  realized as a result of any
such investment,  net of the Indenture Trustee's reasonable fees and expenses in
making such  investment,  shall be held and applied by the Indenture  Trustee in
the same manner as the principal  amount of such investment is to be applied and
any losses,  net of earnings and such  reasonable  fees and  expenses,  shall be
charged against the principal amount  invested.  The Lessee shall be responsible
for and will promptly pay to the Indenture Trustee or the Owner Trustee,  as the
case may be, on  demand,  the amount of any loss  realized  as the result of any
such  investment  (together  with any  fees,  commissions  and  other  costs and
expenses,  if any,  incurred by the  Indenture  Trustee or the Owner  Trustee in
connection  with such  investment),  such amount to be disposed of in accordance
with the terms hereof or the Lease,  as the case may be. The  Indenture  Trustee
shall not be liable for any loss resulting from any investment made by it or any
investment sold by it under this Indenture in accordance with  instructions from
the Lessee other than by reason of its willful  misconduct or gross  negligence,
and any such  investment  may be sold  (without  regard to its  maturity) by the
Indenture Trustee without instructions whenever the Indenture Trustee reasonably
believes  such  sale  is  necessary  to  make a  distribution  required  by this
Indenture.  Notwithstanding the foregoing, amounts paid to the Indenture Trustee
pursuant  to the  first  sentence  of  Section  17.02(b)  of  the  Participation
Agreement  or Section 5.10 hereof  shall be held by the  Indenture  Trustee in a
non-interest  bearing account until  distributed by the Pass-Through  Trustee on
the next succeeding Payment Date.

         Unless otherwise  confirmed in writing,  an account statement delivered
by the Indenture  Trustee to the Owner Trustee (with a copy to the Lessee) shall
be  deemed  written  confirmation  by the  Owner  Trustee  that  the  investment
transactions  identified therein  accurately  reflect the investment  directions
given to the Indenture Trustee by or on behalf of the Lessee,  unless the Lessee
notifies the Indenture  Trustee in writing to the contrary within 30 days of the
date of receipt of such statement.

         Section 5.09.  Withholding  Taxes. The Indenture Trustee shall withhold
any Taxes  required  to be  withheld,  except to the extent  that the Holder has
furnished  evidence  satisfactory to the Indenture Trustee of any exemption from
withholding  claimed by such Holder and under no circumstances shall the failure
of any such Holder to receive any amounts so withheld  constitute  an  Indenture
Event of Default. Notwithstanding any provision to the contrary in Sections 5.01
through 5.05 hereof and subject to Article 8 of the Participation  Agreement, if
the Lessee is required to pay any such Tax, or any interest or penalty  thereon,
or to indemnify the Owner  Participant or the Owner Trustee with respect thereto
pursuant to Section 8.01(c) of the Participation  Agreement, the Lessee shall be
entitled to receive any payments  otherwise  distributable  to the Holder of any
Certificate who was subject to such Tax pursuant to Sections 5.01 to 5.05 hereof
until the  amounts  the  Lessee  shall  have so paid in  respect of any such Tax
[(together with interest thereon at the Debt Rate)] shall have been recovered in
full by the Lessee.

         Section 5.10.  Letter of Credit. If an amount is due and payable by the
Lessee pursuant to the first sentence of Section  17.02(b) of the  Participation
Agreement,  the  Indenture  Trustee  shall  draw upon the Letter of Credit in an
amount equal to such amount due from the Lessee, and such draw shall satisfy the
obligation of the Lessee under such section with respect to such amount.


                                   ARTICLE VI

                           PREPAYMENT OF CERTIFICATES

         Section 6.01.     No Prepayment  Except as Specified.  Except as provided in Sections 6.02,  6.06 and 8.02
hereof, the Certificates may not be prepaid prior to their respective Maturities.

         Section 6.02.     Prepayment of Certificates.  (a) The Outstanding  Certificates  shall be prepaid in full
(and not in part):

                  (i) If an Event of Loss occurs with respect to the Airframe or
         with respect to the Airframe and the Engines or engines then  installed
         on the Airframe  (unless  pursuant to Section 11(a)(1) of the Lease and
         Section 9.08 hereof replacement equipment is substituted therefor).

                  (ii) If the Lessee,  pursuant  to Section  16(a) of the Lease,
         gives  notice of purchase of the  Aircraft  (and Section 2.12 hereof is
         not  applicable  in  connection  with such  purchase),  but  subject to
         Section 6.02(c) below.

                  (iii) If the Owner Participant, or the Owner Trustee on behalf
         of the Owner  Participant,  gives notice of prepayment to the Indenture
         Trustee  pursuant to Section 8.02 hereof (unless such notice is revoked
         in accordance with such Section).

                  (iv) If the  Lessee,  pursuant  to Section  3(g) of the Lease,
         gives notice of a voluntary  termination  for  obsolescence or surplus,
         but subject to Section 6.02(c) below.

                  (v) Pursuant to Section 15.01 of the  Participation  Agreement
         in connection  with a refinancing of the  Certificates,  but subject to
         Section 6.02(c) below.

                  (vi) As  contemplated  by  Section  2.16  hereof  and  Section
         3.05(b) of the  Participation  Agreement if the  Delivery  Date has not
         occurred on or prior to the Cut-Off Date.

                  (vii) At the  option  of the  Owner  Trustee,  with the  prior
         written consent of the Lessee and the Owner Participant,  upon not less
         than 25 days' prior written notice.

                  (viii) If a Triggering Event (as defined in the  Intercreditor
         Agreement)  occurs prior to the earliest of (A) the Delivery  Date, (B)
         the date the  obligations  of the Owner Trustee under the  Certificates
         are  assumed  by  the  Lessee   pursuant  to  Section  3.05(a)  of  the
         Participation Agreement and (iii) the Cut-Off Date.

         (b) In the  event  of a  prepayment  of the  Certificates  pursuant  to
Sections  6.02(a)(ii),  (iv) and (v) above,  the Owner Trustee,  having received
notice  from the Lessee in  accordance  with and subject to the terms of Section
16(a) or 3(g) of the Lease or Article 15 of the Participation  Agreement, as the
case may be, shall give irrevocable  (subject to Section 6.02(c) hereof) written
notice to the  Indenture  Trustee and to the Holders of all of the  Certificates
specifying the Business Day on which the Certificates  shall be prepaid.  In the
case of a prepayment of the Certificates  pursuant to Section  6.02(a)(i) above,
the Certificates shall be prepaid in full on the Loss Payment Date as defined in
Section  11(a)(2) of the Lease. In the case of a prepayment of the  Certificates
pursuant to Section  6.02(a)(iii)  above, the  Certificates  shall be prepaid in
full on the date so designated in the notice referred to in Section 8.02 hereof.
In the case of a prepayment of the Certificates  pursuant to Section 6.02(a)(ii)
or (iv)  above,  the  Certificates  shall be prepaid in full on the  Termination
Date.  In the case of a  prepayment  of the  Certificates  pursuant  to  Section
6.02(a)(v) above, the Certificates shall be prepaid on the effective date of the
Refinancing. In the case of a prepayment of the Certificates pursuant to Section
6.02(a)(vi)  above, the Certificates  shall be prepaid on the 15th day following
the Cut-Off Date. In the case of a prepayment  of the  Certificates  pursuant to
Section  6.02(a)(vii)  above,  the  Certificates  shall be  prepaid  on the date
designated in the notice referred to therein. In the case of a prepayment of the
Certificates pursuant to Section 6.02(a) (viii) above, the Certificates shall be
prepaid  on the  Special  Distribution  Date (as  defined  in the  Intercreditor
Agreement) as provided in Section 2.4(b)(ii) of the Intercreditor Agreement. The
day on which the Certificates are to be prepaid pursuant to this Section 6.01(b)
is herein referred to as the "Prepayment Date".

         On or prior to the Prepayment Date,  immediately  available funds shall
be  deposited  with  the  Indenture  Trustee  in an  amount  in  respect  of the
Certificates equal to:

                  (1) if such prepayment is made pursuant to Section 6.02(a)(i),
         (iii) (if clause (i),  but not clause (ii) or clause (iii) of the first
         sentence of Section  8.02(a) of the  Indenture is  applicable  and such
         prepayment  is made  when an Event of  Default  has  occurred  and been
         continuing  for 180 days or more,  or if clause (ii) or clause (iii) of
         the  first  sentence  of  Section   8.02(a)   hereof  is   applicable),
         6.02(a)(vi)  or  6.02(a)(viii)  above,  the  sum of (A)  the  aggregate
         principal amount of such  Certificates  then  Outstanding,  (B) accrued
         interest on the  Certificates  to the Prepayment Date and (C) all other
         aggregate  sums  due the  Indenture  Trustee  hereunder  or  under  the
         Participation  Agreement or the Lease,  but  excluding  any  Make-Whole
         Premium or other premium or penalty, or

                  (2)  if  such   prepayment   is  made   pursuant   to  Section
         6.02(a)(ii), 6.02(a)(iii) (if clause (i), but not clause (ii) or clause
         (iii) of the first  sentence  of Section  8.02(a) of the  Indenture  is
         applicable  and such  prepayment  is made when an Event of Default  has
         occurred  and been  continuing  for less  than 180  days)  6.02(a)(iv),
         6.02(a)(v) or 6.02(a)(vii)  above, the sum of the amounts  specified in
         clauses  (A),  (B)  and  (C) of  the  preceding  clause  (1)  plus  any
         Make-Whole Premium payable in respect of all Certificates

(the aggregate amount required to be paid pursuant to this sentence being herein
referred to as the "Prepayment Price").

         (c) If, pursuant to the last paragraph of Section 3(g) of the Lease, no
Termination  Date shall  occur,  or if no  refinancing  shall occur  pursuant to
Article 15 of the Participation  Agreement, the Lessee shall give notice thereof
to the Indenture Trustee,  and the prepayment proposed to be effected in respect
thereof shall not occur.

         Section 6.03.  Notice of Prepayment to Holders.  In order to effect any
prepayment set forth in Section 6.02(a) hereof, the Indenture Trustee shall give
prompt notice by first class mail of prepayment to each Holder of an Outstanding
Certificate.  Any notice of prepayment given by the Owner Trustee may be revoked
by the Owner  Trustee  at any time on or before  the  Prepayment  Date by prompt
notice  to  the  Holders  except  as  otherwise  provided  in the  Lease  or the
Participation Agreement.

         All notices of prepayment shall state:

                  (1)      the Prepayment Date,

                  (2)      the applicable basis for determining the Prepayment Price,

                  (3) that on the  Prepayment  Date,  subject to the  provisions
         hereof,  the  Prepayment  Price will become due and  payable,  and that
         interest  on the  Certificates  shall cease to accrue on and after such
         Prepayment Date, and

                  (4) the  place or places  where  such  Certificates  are to be
surrendered for payment.

         Section 6.04.  Deposit of Prepayment  Price and Sinking Fund Redemption
Price. On the Prepayment Date or the Sinking Fund Redemption Date (as defined in
Section 6.06 hereof),  the Owner Trustee shall, to the extent an amount equal to
the Prepayment Price or the Sinking Fund Redemption Price (as defined in Section
6.06  hereof),  as the case may be,  shall not then be held in cash or Permitted
Investments  (marked-to-market  net of all costs  and  expenses  of  liquidation
thereof) by the Indenture  Trustee in immediately  available funds and deposited
for the purpose,  pay to the Indenture Trustee an amount equal to the difference
between (a) the amount then so held and (b) the Prepayment  Price or the Sinking
Fund  Redemption  Price,  as the case may be.  If there  shall so be on  deposit
and/or  deposited the  applicable  Prepayment  Price or Sinking Fund  Redemption
Price on or prior to a Prepayment Date or Sinking Fund Redemption Date, interest
shall cease to accrue in respect of all or, in the case of a  mandatory  sinking
fund  redemption,  the  relevant  portion  being  prepaid  of,  the  Outstanding
Certificates  on and after such  Prepayment Date or such Sinking Fund Redemption
Date.

         Section  6.05.   Certificates   Payable  on  Prepayment  Date.  On  the
Prepayment  Date, the  Outstanding  Certificates  shall (except (A) if the Owner
Trustee has requested the Indenture  Trustee to revoke such notice of prepayment
in  accordance  with  Section  6.03 hereof or (B) as  otherwise  provided in the
Lease)  become due and payable and from and after such  Prepayment  Date (unless
there  shall  be a  default  in  the  payment  of  the  Prepayment  Price)  such
Certificates  shall cease to bear interest.  Upon surrender by any Holder of its
Certificate for prepayment in accordance with said notice,  such Holder shall be
paid the principal amount of its Certificate then outstanding,  accrued interest
thereon to the  Prepayment  Date,  all other sums due to such Holder  hereunder,
under the Participation Agreement or the Lease, plus, if a Make-Whole Premium is
payable pursuant to Section 6.02(b) hereof, the Make-Whole Premium in respect of
such Certificate.

         If any  Certificate  called  for  prepayment  shall not be so paid upon
timely  surrender  thereof for  prepayment,  the  principal  shall,  until paid,
continue  to  bear  interest  from  the  Prepayment  Date at the  interest  rate
applicable to such Certificate.

         Section 6.06. Mandatory Sinking Fund Redemption. The Certificates shall
be subject to partial  redemption,  at the aggregate  principal amount set forth
for the Certificates of the respective Series and Maturity, on a pro rata basis,
on each date  specified in this Section (a "Sinking Fund  Redemption  Date") for
such payment on the Certificates of such Series and Maturity.  The Owner Trustee
shall deposit funds sufficient to pay the Sinking Fund Redemption Price with the
Indenture  Trustee as provided in Section 6.04  hereof.  The  Indenture  Trustee
shall  pay from  the  amounts  so  deposited  on each  applicable  Sinking  Fund
Redemption Date to the  Certificates of each Series in the order of priority set
forth  in  clause  "first"  of  Section  5.01  and  among  the  Holders  of  the
Certificates  of each Series then  Outstanding on a pro rata basis the aggregate
principal amount set forth in Schedule II hereto, together with accrued interest
to such  Sinking  Fund  Redemption  Date,  but without  Make-Whole  Premium (the
"Sinking Fund Redemption Price"):



                                   ARTICLE VII

                      INDENTURE EVENTS OF DEFAULT; REMEDIES
                        OF INDENTURE TRUSTEE AND HOLDERS

         Section 7.01. Indenture Event of Default.  "Indenture Event of Default"
means any of the following  events (whatever the reason for such Indenture Event
of Default and whether it shall be voluntary or  involuntary or come about or be
effected by operation of law or pursuant to or in compliance  with any judgment,
decree  or  order  of  any  court  or  any  order,  rule  or  regulation  of any
administrative or governmental body):

                  (i) any Event of Default  specified in Section 14 of the Lease
         (other  than an Event of  Default  arising  solely as the result of the
         failure to make an Excepted Payment unless the Owner  Participant shall
         notify  the  Indenture  Trustee  in  writing  that such  failure  shall
         constitute an Indenture Event of Default); or

                  (ii) the failure of the Owner  Trustee other than by reason of
         a Default  or an Event of Default  (i) to pay  principal,  interest  or
         Make-Whole  Premium,  if any,  on any  Certificate  when due,  and such
         failure shall have continued unremedied for ten Business Days after the
         date when due or (ii) to pay any other  amounts  hereunder or under the
         Certificates when due and such failure shall have continued  unremedied
         for a  period  of 30  days  after  the  Owner  Trustee  and  the  Owner
         Participant  shall receive  written demand  therefor from the Indenture
         Trustee or by the Holders of not less than 25% in  aggregate  principal
         amount of Outstanding Certificates; or

                  (iii) (A) any  representation  or  warranty  made by SSB,  the
         Owner Trustee, the Owner Participant or any Owner Participant Guarantor
         or any Owner Trustee  Guarantor,  in any Operative  Agreement or in any
         certificate of SSB, the Owner Trustee,  the Owner  Participant,  or any
         Owner Participant  Guarantor  furnished to the Indenture Trustee or any
         Holder in  connection  herewith  or  therewith  or  pursuant  hereto or
         thereto  shall  prove  to have  been  incorrect  when  made and was and
         remains  in  any   respect   material   to  the  Holders  and  if  such
         misrepresentation is capable of being corrected as of a subsequent date
         and  if  such   correction  is  being  sought   diligently,   and  such
         misrepresentation   shall  not  have  been  corrected  within  30  days
         following notice thereof  identified as a "Notice of Indenture Event of
         Default" being given to the Owner Trustee and the Owner  Participant by
         the  Indenture  Trustee or by a Majority  in  Interest  of  Certificate
         Holders; or

                  (B) any (x)  covenant  made by the Owner  Trustee in the fifth
         paragraph following the Habendum Clause hereof or Section  3.05(b)(iii)
         hereof or Section 7.02(b) or 7.12 of the Participation  Agreement shall
         be breached in any respect,  (y) covenant made by the Owner Participant
         in Section 7.02(c) or Section 7.13 of the Participation Agreement shall
         be breached in any  respect,  or (z) other  covenant  made by the Owner
         Trustee,  in its  individual  capacity or as Owner  Trustee,  or by any
         Owner Trustee  Guarantor,  or by any Owner  Participant or by any Owner
         Participant  Guarantor in any Operative  Agreement shall be breached in
         any respect and such breach shall remain  unremedied for a period of 30
         days  after  there has been  given to the Owner  Trustee  and any Owner
         Participant  by the  Indenture  Trustee or by Holders  holding not less
         than 25% in aggregate  principal  amount of Outstanding  Certificates a
         written notice  identified as a "Notice of Indenture  Event of Default"
         specifying such breach and requiring it to be remedied; or

                  (iv) the Owner Trustee, the Lessor's Estate, any Owner Trustee
         Guarantor,  any Owner  Participant or any Owner  Participant  Guarantor
         shall   file  any   petition   or  answer   seeking   for   itself  any
         reorganization,  arrangement, composition,  readjustment,  liquidation,
         dissolution or similar  relief under any present or future  bankruptcy,
         insolvency or similar statute, law or regulation;

                  (v) an order for  relief  shall be  entered  in respect of the
         Owner Trustee or any Owner Trustee  Guarantor or any Owner  Participant
         or any Owner  Participant  Guarantor or the Lessor's  Estate by a court
         having  jurisdiction  in the premises in an involuntary  case under the
         federal  bankruptcy  laws as now or hereafter  in effect;  or the Owner
         Trustee or any Owner Trustee  Guarantor or any Owner Participant or any
         Owner  Participant  Guarantor  or the  Lessor's  Estate  shall file any
         answer  admitting  or not  contesting  the  material  allegations  of a
         petition filed against the Owner Trustee or any Owner Trustee Guarantor
         or any Owner  Participant  or any Owner  Participant  Guarantor  or the
         Lessor's  Estate in any proceeding  referred to in clause (vi) below or
         seek  or  consent  or  acquiesce  in the  appointment  of any  trustee,
         custodian,  receiver or  liquidator  of the Owner  Trustee or any Owner
         Trustee  Guarantor or any Owner  Participant  or any Owner  Participant
         Guarantor or the Lessor's Estate,  as the case may be, or of all or any
         substantial part of its properties; or

                  (vi) without the consent or  acquiescence of the Owner Trustee
         or any Owner Trustee  Guarantor or any Owner  Participant  or any Owner
         Participant  Guarantor or the Lessor's  Estate,  as the case may be, an
         order shall be entered  constituting an order for relief or approving a
         petition for relief or reorganization or any other petition seeking any
         reorganization,  arrangement, composition,  readjustment,  liquidation,
         dissolution  or other  similar  relief  under  any  present  or  future
         bankruptcy, insolvency or similar statute, law or regulation, or if any
         such  petition  shall be filed  against the Owner  Trustee or any Owner
         Trustee  Guarantor or any Owner  Participant  or any Owner  Participant
         Guarantor or the Lessor's Estate, as the case may be, and such petition
         shall not be dismissed  within 60 days,  or if,  without the consent or
         acquiescence of the Owner Trustee or any Owner Trustee Guarantor or any
         Owner  Participant or any Owner  Participant  Guarantor or the Lessor's
         Estate,  as the case may be, an order  shall be  entered  appointing  a
         trustee, custodian,  receiver or liquidator of the Owner Trustee or any
         Owner  Trustee   Guarantor  or  any  Owner  Participant  or  any  Owner
         Participant Guarantor or the Lessor's Estate, as the case may be, or of
         all or any  substantial  part of the properties of the Owner Trustee or
         any  Owner  Trustee  Guarantor  or any Owner  Participant  or any Owner
         Participant  Guarantor or the Lessor's Estate,  as the case may be, and
         such order shall not be dismissed within 60 days; or

                  (vii)  any Owner  Trustee  Guaranty  or any Owner  Participant
         Guaranty  shall cease to be a valid and  enforceable  obligation of any
         Owner Trustee Guarantor or any Owner Participant Guarantor, as the case
         may be, or otherwise shall not be in full force and effect.

         Section 7.02. Remedies. (a) If an Indenture Event of Default shall have
occurred  and be  continuing  and  so  long  as the  same  shall  be  continuing
unremedied,  then and in every such case,  the  Indenture  Trustee may, and when
required by the provisions of Article IX or Section  7.02(c)  hereof,  shall (i)
exercise  any or all of the  rights  and  powers  and  pursue any and all of the
remedies  pursuant to this  Article  VII,  and (ii) in the event such  Indenture
Event of Default is an Indenture  Event of Default  referred to in clause (i) of
Section 7.01 hereof, exercise any and all of the remedies pursuant to Section 15
of the Lease;  provided  that  without the consent of the Owner  Trustee and the
Owner  Participant  such  exercise of  remedies  shall not occur until after the
latest date on which the Owner  Trustee  may cure the  related  Event of Default
pursuant to Section  8.03  hereof.  The  Indenture  Trustee may  (subject to the
provisions of the next succeeding  paragraph) take possession of all or any part
of the  properties  covered or intended  to be covered by the Lien and  security
interest   created  hereby  or  pursuant   hereto  and  may  exclude  the  Owner
Participant,  the Owner  Trustee,  the Lessee and any  transferee  of the Lessee
(subject to Section 15.05  hereof),  and all Persons  claiming under any of them
wholly or partly therefrom.  In addition,  the Indenture Trustee may (subject to
the  provisions of the next  succeeding  paragraph)  exercise any other right or
remedy in lieu of or in addition to the  foregoing  that may be  available to it
under  applicable  law, or proceed by  appropriate  court  action to enforce the
terms hereof,  of the Lease, or both, or to rescind the Lease.  Without limiting
any of the foregoing, it is understood and agreed that the Indenture Trustee may
exercise any right of sale of the Aircraft available to it, even though it shall
not have taken possession of the Aircraft and shall not have possession  thereof
at the time of such sale.

         Notwithstanding the foregoing,  it is understood and agreed that if the
Indenture  Trustee  shall proceed to foreclose  the Lien of this  Indenture,  it
shall  substantially  simultaneously  therewith,  to the  extent  the  Indenture
Trustee is then entitled to do so hereunder and under the Lease, and is not then
stayed or otherwise  prevented  from doing so, proceed (to the extent it has not
already  done so) to declare the Lease in default and  commence  the exercise in
good faith of one or more of the  significant  remedies  under Section 15 of the
Lease (as the  Indenture  Trustee  determines  in its sole  discretion)  for the
purpose of recovering the Aircraft.  It is further understood and agreed that if
the Indenture  Trustee is unable to exercise one or more remedies  under Section
15 of the  Lease  because  of any stay or  operation  of law or  otherwise,  the
Indenture  Trustee shall not be entitled to foreclose the Lien of this Indenture
(A)  until  the  earlier  of (i) 60  days  from  the  date of any  such  stay or
applicable  order under Section 1110 of the  Bankruptcy  Code plus any extension
consented to by the  Indenture  Trustee or the Holders of  Certificates  of such
period as permitted  under Section  1110(b) of the Bankruptcy  Code and (ii) the
date of actual  repossession of the Aircraft by the Indenture  Trustee or (B) if
the Lessee has agreed to perform or assume the Lease  pursuant to Section 365 or
1110 of the Bankruptcy  Code and no Event of Default (other than as specified in
Section  14(f),  (g),  (h) or (i) of the  Lease,  or other  Event of  Default in
respect of which the 30-day  period  referred to in clause  (a)(1)(B)(ii)(l)  of
Section  1110 of the  Bankruptcy  Code  shall  not yet  have  expired)  shall be
continuing.  For the avoidance of doubt,  it is expressly  understood and agreed
that except as aforesaid the above-described  inability of the Indenture Trustee
to exercise  any right or remedy  under the Lease shall in no event and under no
circumstances  prevent the Indenture  Trustee from exercising all of its rights,
powers and remedies under this Indenture,  including,  without limitation,  this
Article  VII.  The  Indenture  Trustee  further  agrees that notice of intent to
foreclose shall be given to the Owner Trustee at the earlier of the commencement
of any proceeding or at least 30 days prior to the  consummation  of foreclosure
of the Lien of this Indenture.

         (b) If an Indenture  Event of Default under clause (iv), (v) or (vi) of
Section 7.01 hereof shall occur and be continuing,  the unpaid  principal of all
Outstanding Certificates,  together with interest accrued but unpaid thereon and
all  other  amounts  due  thereunder,  but  without  Make-Whole  Premium,  shall
immediately  become due and payable,  without  presentment,  demand,  protest or
notice, all of which are hereby waived.

         (c) If any  Indenture  Event of Default not  described in the preceding
paragraph  (b) shall have  occurred  and be  continuing,  then and in every such
case,  the  Indenture  Trustee  may on its own accord or at the  direction  of a
Majority in Interest of Certificate  Holders,  at any time, by written notice to
the Owner Trustee,  the Owner Participant and the Lessee,  declare the principal
of all the  Certificates to be due and payable,  whereupon the unpaid  principal
amount of all Outstanding  Certificates,  together with accrued interest thereon
and all other amounts due  thereunder,  but without  Make-Whole  Premium,  shall
immediately become due and payable without presentment, demand, protest or other
notice,  all of which are hereby waived.  At any time after such declaration and
prior to the sale or disposition of the Trust  Indenture  Estate,  however,  the
Holders  of not less  than 50% in  aggregate  principal  amount  of  Outstanding
Certificates,  by notice to the  Indenture  Trustee,  the Owner  Trustee and the
Lessee,  may rescind such declaration,  whether made by the Indenture Trustee on
its own accord or as directed,  if (x) there has been paid or deposited with the
Indenture  Trustee a sum sufficient to pay all overdue  installments of interest
on all Certificates  (together, to the extent permitted by law, with interest on
such overdue  installments of interest),  the principal on any Certificates that
would have become due otherwise than by such  declaration of  acceleration,  all
sums paid or advanced by the  Indenture  Trustee  hereunder  and the  reasonable
compensation, expenses, disbursements and advances of the Indenture Trustee, its
agents and  counsel,  or (y) all  Indenture  Events of Default  (other  than the
nonpayment of principal that has become due solely because of such acceleration)
have been either  cured or waived as provided in Section  7.11  hereof.  No such
rescission  shall affect any subsequent  default or impair any right  consequent
thereon.

         (d) Each Holder  shall be  entitled  at any sale to credit  against any
purchase  price bid at such sale by such  Holder  all or any part of the  unpaid
obligations owing to such Holder secured by the Lien of this Indenture (but only
to the extent that an amount equal to such  purchase  price would have been paid
to such Holder  pursuant to Article V hereof if such purchase price were paid in
cash and the foregoing provisions of this subsection (d) were not given effect).

         Section  7.03.  Return of  Aircraft.  etc.  (a) Subject to Section 7.02
hereof,  if an Indenture Event of Default shall have occurred and be continuing,
at the  request of the  Indenture  Trustee,  the Owner  Trustee  shall  promptly
execute and deliver to the  Indenture  Trustee such  documents as the  Indenture
Trustee may deem  necessary or advisable to enable the  Indenture  Trustee or an
agent or  representative  designated by the Indenture  Trustee,  at such time or
times and  place or  places as the  Indenture  Trustee  may  specify,  to obtain
possession  of all or any  part of the  Trust  Indenture  Estate  to  which  the
Indenture Trustee shall at the time be entitled under this Indenture. Subject to
the  foregoing,  if the Owner  Trustee  shall for any reason fail to execute and
deliver  such  documents  after  such  request  by the  Indenture  Trustee,  the
Indenture Trustee may pursue all or part of such Trust Indenture Estate wherever
it may be found and enter any of the premises of the Lessee or the Owner Trustee
wherever such Trust Indenture  Estate may be or be supposed to be and search for
such  Trust  Indenture  Estate  and take  possession  of and  remove  such Trust
Indenture Estate. All expenses of pursuing,  searching for and taking such Trust
Indenture Estate shall, until paid, be secured by the Lien of this Indenture.

         (b) Upon every such taking of  possession,  the Indenture  Trustee may,
from time to time, at the expense of the Trust Indenture  Estate,  make all such
expenditures  for  maintenance,  insurance  and  repairs  to and of  such  Trust
Indenture  Estate,  as the Indenture Trustee may reasonably deem proper. In each
case subject to Section 7.02 hereof,  the Indenture Trustee shall have the right
to maintain,  use, operate,  store, lease, control or manage the Trust Indenture
Estate and to carry on the business and to exercise all rights and powers of the
Owner  Participant and the Owner Trustee relating to the Trust Indenture Estate,
as the Indenture Trustee may reasonably deem best,  including the right to enter
into any and all such  agreements  with respect to the  maintenance,  insurance,
use, operation,  storage, leasing, control,  management or disposition of all or
any part of the Trust Indenture  Estate as the Indenture  Trustee may determine.
Further, the Indenture Trustee shall be entitled to collect and receive directly
all tolls,  rents  (including  Rent),  revenues,  issues,  income,  products and
profits of the Trust  Indenture  Estate other than  Excepted  Payments,  without
prejudice, however, to the right of the Indenture Trustee under any provision of
this  Indenture  to collect  and  receive  all cash held by, or  required  to be
deposited with, the Indenture  Trustee under this Indenture.  Such tolls,  rents
(including  Rent),  revenues,  issues,  income,  products  and profits  shall be
applied to pay the expenses of the use, operation,  storage,  leasing,  control,
management, or disposition of the Trust Indenture Estate, and of all maintenance
and  repairs,  and to make all  payments  which  the  Indenture  Trustee  may be
required or may reasonably elect to make for any taxes,  assessments,  insurance
or  other  proper  charges  upon  the  Trust  Indenture  Estate  (including  the
employment of engineers  and  accountants  to examine,  inspect and make reports
upon the  properties and books and records of the Owner Trustee and the Lessee),
and all other payments which the Indenture Trustee may be required or authorized
to make under any provision of this  Indenture,  as well as just and  reasonable
compensation  for the  services  of the  Indenture  Trustee  and of all  persons
properly  engaged  and  employed  for such  purposes by the  Indenture  Trustee;
provided,  that any excess  amounts shall be promptly  distributed in accordance
with Section 5.03 hereof.

         (c) Subject to Section  7.02 hereof,  if an Indenture  Event of Default
shall  have  occurred  and be  continuing  and the  Indenture  Trustee  shall be
entitled to exercise remedies hereunder, and subject to Article VIII hereof, the
Indenture Trustee,  either with or without taking possession,  and either before
or after  taking  possession,  and  without  instituting  any legal  proceedings
whatsoever,  may sell,  assign,  transfer and deliver the whole or, from time to
time, to the extent permitted by law, any part of the Trust Indenture Estate, or
any part thereof,  or interest therein, at any private sale or public auction to
the highest bidder, with or without demand, advertisement or notice, except that
in respect of any private sale 30 days' prior written notice by registered  mail
to the Owner Trustee and any Owner  Participant  will be provided,  for cash or,
with the consent of the Owner Trustee and any Owner  Participant,  credit or for
other property,  for immediate or future delivery,  and for such price or prices
and on such terms as the Indenture Trustee in exercising  reasonable  commercial
discretion  may determine;  provided,  that any such action shall be at the time
lawful and that all mandatory  legal  requirements  shall be complied  with. Any
notice required pursuant to the terms hereof in the case of a public sale, shall
state the time and place fixed for such sale. Any such public sale shall be held
at such time or times within  ordinary  business hours as the Indenture  Trustee
shall fix in the notice of such  sale.  At any such  sale,  the Trust  Indenture
Estate may be sold in one lot as an entirety or in separate  lots. The Indenture
Trustee  shall not be  obligated to make any sale  pursuant to such notice.  The
Indenture  Trustee may,  without  notice or  publication,  adjourn any public or
private sale or cause the same to be adjourned from time to time by announcement
at the time and place fixed for such sale,  and any such sale may be made at any
time or place to which the same may be so adjourned  without  further  notice or
publication.  The  Indenture  Trustee may  exercise  such right of sale  without
possession or production of the Certificates or proof of ownership thereof,  and
as  representative  of the Holders may exercise such right without notice to the
Holders or without  including the Holders as parties to any suit or  proceedings
relating to the foreclosure of any part of the Trust Indenture Estate. The Owner
Trustee  shall  execute  any and all such bills of sale,  assignments  and other
documents,  and  perform  and do all  other  acts and  things  requested  by the
Indenture  Trustee  in order to  permit  consummation  of any sale of the  Trust
Indenture  Estate in accordance  with this Section 7.03(c) and to effectuate the
transfer  or  conveyance  referred  to in the  first  sentence  of this  Section
7.03(c).  Notwithstanding  any other provision of this Indenture,  the Indenture
Trustee shall not sell the Trust Indenture Estate or any part thereof unless the
Certificates shall have been accelerated.

         (d) To the extent  permitted by applicable  law, and subject to Section
7.02 hereof, the Indenture Trustee or any Holder may be a purchaser of the Trust
Indenture  Estate  or any  part  thereof  or any  interest  therein  at any sale
thereof,  whether  pursuant to  foreclosure  or power of sale or otherwise.  The
Indenture  Trustee may apply against the purchase price therefor the amount then
due hereunder or under any of the Certificates secured hereby and any Holder may
apply against the purchase  price  therefor the amount then due to it hereunder,
under any other Indenture Document or under the Certificates held by such Holder
to the extent of such  portion of the purchase  price as it would have  received
had it been entitled to share any distribution thereof. The Indenture Trustee or
any Holder or nominee thereof shall, upon any such purchase,  acquire good title
to the property so  purchased,  free of the Lien of this  Indenture  and, to the
extent  permitted by  applicable  law,  free of all rights of  redemption in the
Owner Trustee or the Owner Participant in respect of the property so purchased.

         (e) The Indenture  Trustee shall,  as a matter of right, be entitled to
the appointment of a receiver (who may be the Indenture Trustee or any successor
or nominee)  for all or any part of the Trust  Indenture  Estate,  whether  such
receivership be incidental to a proposed sale of the Trust  Indenture  Estate or
the taking of  possession  thereof or otherwise,  and the Owner  Trustee  hereby
consents  to the  appointment  of such  receiver  and will not  oppose  any such
appointment.  Any receiver  appointed for all or any part of the Trust Indenture
Estate  shall be  entitled  to  exercise  all of the  rights  and  powers of the
Indenture Trustee with respect to the Trust Indenture Estate.

         Section  7.04.  Indenture  Trustee May Prove Debt. If the Owner Trustee
shall fail to pay any amount payable  hereunder or under the  Certificates,  the
Indenture Trustee,  in its own name and as trustee of an express trust, shall be
entitled  and  empowered  to institute  any action or  proceedings  at law or in
equity for the  collection of the sums so due and unpaid,  and may prosecute any
such action or proceedings to judgment or final decree, and may enforce any such
judgment or final  decree  against  the Owner  Trustee and collect in the manner
provided by law out of the property of the Owner Trustee wherever situated,  the
moneys adjudged or decreed to be payable; provided, that any sale of any portion
of the Trust Indenture Estate shall be done in accordance with Sections 7.02 and
7.03(c) hereof.

         In case  there  shall be  pending  proceedings  relative  to the  Owner
Trustee  under the  Bankruptcy  Code or any other  applicable  Federal  or state
bankruptcy,  insolvency or other similar 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  possession of the Owner Trustee
or its  property,  or in  case  of any  other  comparable  judicial  proceedings
relative  to the Owner  Trustee,  or to the  creditors  or property of the Owner
Trustee,  the Indenture  Trustee,  irrespective  of whether the principal of the
Certificates  shall then be due and payable as therein or herein expressed or by
declaration or otherwise and irrespective of whether the Indenture Trustee shall
have made any  demand  pursuant  to the  provisions  of this  Section,  shall be
entitled and empowered, by intervention in such proceedings or otherwise:

                  (a) to file and prove a claim or claims  for the whole  amount
         of principal, interest and other amounts owing and unpaid in respect of
         the  Certificates  or  hereunder,  and to file  such  other  papers  or
         documents  as may be necessary or advisable in order to have the claims
         of  the  Indenture   Trustee   (including   any  claim  for  reasonable
         compensation to the Indenture  Trustee and each  predecessor  Indenture
         Trustee,  and their respective agents,  attorneys and counsel,  and for
         reimbursement of the Indenture  Trustee and each predecessor  Indenture
         Trustee,  except as a result of  negligence  or bad  faith)  and of the
         Holders  allowed  in any  judicial  proceedings  relative  to the Owner
         Trustee or to the creditors or property of the Owner Trustee,

                  (b) unless  prohibited by applicable law and  regulations,  to
         vote on behalf of the Holders in any election of a trustee or a standby
         trustee in arrangement, reorganization, liquidation or other bankruptcy
         or insolvency  proceedings or person  performing  similar  functions in
         comparable proceedings, and

                  (c) to  collect  and  receive  any  moneys  or other  property
         payable  or  deliverable  on any such  claims,  and to  distribute  all
         amounts  received  with respect to the claims of the Holders and of the
         Indenture Trustee on their behalf;

and any trustee, receiver, or liquidator, custodian or other similar official is
hereby  authorized  by each of the  Holders to make  payments  to the  Indenture
Trustee,  and,  in the event that the  Indenture  Trustee  shall  consent to the
making of payments directly to the Holders, to pay to the Indenture Trustee such
amounts as shall be sufficient to cover reasonable compensation to the Indenture
Trustee,  each  predecessor  Indenture  Trustee  and  their  respective  agents,
attorneys and counsel, and all other expenses and liabilities incurred,  and all
advances made, by the Indenture  Trustee and each predecessor  Indenture Trustee
except as a result of negligence or willful misconduct.

         Nothing  contained  herein shall be deemed to authorize  the  Indenture
Trustee to  authorize  or consent to or vote for or accept or adopt on behalf of
any Holder any plan of  reorganization,  arrangement,  adjustment or composition
affecting the Certificates or the rights of any Holder thereof,  or to authorize
the Indenture  Trustee to vote in respect of the claim of any Holder in any such
proceeding  except,  as  aforesaid,  to vote for the  election  of a trustee  in
bankruptcy or similar person.

         All rights of action and rights to assert claims under this  Indenture,
or under any of the  Certificates,  may be  enforced  by the  Indenture  Trustee
without the  possession  of such  Certificates.  Any trial or other  proceedings
instituted by the Indenture  Trustee shall be brought in its own name as trustee
of an express trust, and any recovery of judgment, subject to the payment of the
expenses,   disbursements  and  compensation  of  the  Indenture  Trustee,  each
predecessor  Indenture Trustee and their respective agents and attorneys,  shall
be for the ratable benefit of the Holders, as provided herein.

         In any  proceedings  brought  by the  Indenture  Trustee  (and also any
proceedings  involving the  interpretation of any provision of this Indenture to
which the Indenture  Trustee  shall be a party) the  Indenture  Trustee shall be
held to  represent  all the  Holders  of the  Certificates,  and it shall not be
necessary to make any Holders parties to such proceedings.

         Section  7.05.  Remedies  Cumulative.  Each and every right,  power and
remedy given to the Indenture  Trustee in this Indenture shall be cumulative and
shall be in addition to every other right,  power and remedy  specifically given
herein or now or  hereafter  existing at law, in equity or by statute,  and each
and every right, power and remedy whether specifically given herein or otherwise
existing  may be  exercised  from time to time and as often and in such order as
may be  deemed  expedient  by the  Indenture  Trustee  or the  Holders,  and the
exercise or the  beginning  of the  exercise of any power or remedy shall not be
construed  to be a waiver of the right to exercise at the same time or later any
other right,  power or remedy.  No delay or omission by the Indenture Trustee or
of any Holder in the exercise of any right,  remedy or power or in the pursuance
of any remedy shall impair any such right, power or remedy or be construed to be
a waiver of any default on the part of the Owner  Trustee or the Lessee or to be
an acquiescence in any such default.

         Section 7.06. Suits for  Enforcement.  If an Indenture Event of Default
has occurred,  has not been waived and is continuing,  the Indenture Trustee may
in its discretion and subject to its rights of appropriate indemnification under
Sections 7.08 and 9.03 and Article XI hereof  proceed to protect and enforce its
rights and rights of the Holders by such appropriate judicial proceedings as the
Indenture  Trustee shall deem most  effectual to protect and enforce any of such
rights,  either at law or in equity or 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  Indenture  Trustee or
the Holders by this Indenture or by law; provided,  that any sale of any portion
of the Trust Indenture Estate shall be done in accordance with Sections 7.02 and
7.03(c) hereof.

         Section  7.07  Discontinuance  of  Proceedings.  In case the  Indenture
Trustee or any Holder shall have instituted any proceeding to enforce any right,
power or remedy under this  Indenture by  foreclosure,  entry or otherwise,  and
such  proceeding  shall have been  discontinued  or abandoned  for any reason or
shall have been  determined  adversely to the Indenture  Trustee or such Holder,
then the Owner  Trustee,  the  Indenture  Trustee,  any Owner  Participant,  the
Holders  and the Lessee  shall,  subject to any  binding  determination  in such
proceeding,  be  restored  to their  former  positions  and  rights  under  this
Indenture with respect to the Trust Indenture Estate,  and all rights,  remedies
and powers of the Indenture Trustee and the Holders shall continue as if no such
proceeding had been instituted.

         Section  7.08.  Limitations  on  Suits by  Holders.  No  Holder  of any
Certificate  shall have any right by virtue or by availing of any  provision  of
this  Indenture to institute  any action or proceeding at law or in equity or in
bankruptcy or otherwise upon or under or with respect to this Indenture,  or for
the appointment of a trustee, receiver,  liquidator,  custodian or other similar
official or for any other remedy hereunder,  unless such Holder previously shall
have given to the Indenture  Trustee  written notice that an Indenture  Event of
Default shall then have occurred and be continuing,  as  hereinbefore  provided,
and a Majority  in  Interest  of  Certificate  Holders  shall have made  written
request upon the Indenture  Trustee to institute  such action or  proceedings in
its own name as  trustee  hereunder  and shall  have  offered  to the  Indenture
Trustee such reasonable indemnity as it may require against the costs,  expenses
and liabilities to be incurred therein or thereby and the Indenture  Trustee for
60 days after its receipt of such notice,  request and offer of indemnity  shall
have  failed to  institute  any such  action  or  proceedings  and no  direction
inconsistent  with such written  request  shall have been given to the Indenture
Trustee pursuant to Section 7.10 hereof;  it being understood and intended,  and
being expressly  covenanted by the Holder of each  Certificate  with every other
Holder of each other Certificate and the Indenture Trustee,  that no one or more
Holders  shall  have any right in any  manner  whatever  to  affect,  disturb or
prejudice  the rights of any other  Holder or the Lien of this  Indenture or any
part of the Trust Indenture  Estate or 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 provided herein and for the equal,  ratable and
common  benefit  of all  Holders.  For the  protection  and  enforcement  of the
provisions  of this  Section,  each and every Holder and the  Indenture  Trustee
shall be entitled to such relief as can be given either at law or in equity.

         Section   7.09.   Unconditional   Right  of  Holders  to   Payments  on
Certificates.  Notwithstanding  any other  provision in this  Indenture  and any
provision of any Certificate,  the right of any Holder to receive payment of the
principal of and interest and Make-Whole Premium, if any, on such Certificate on
or  after  the  respective  due  dates  and  in the  manner  expressed  in  such
Certificate,  or,  subject to Section  7.08 hereof,  to  institute  suit for the
enforcement  of any such payment on or after such  respective  dates as provided
herein, shall not be impaired or affected without the consent of such Holder.

         Section  7.10.  Control  by  Holders.   The  Majority  in  Interest  of
Certificate  Holders shall have the right to direct the Indenture  Trustee as to
the  time,  method,  and  place of  conducting  any  proceeding  for any  remedy
available to the Indenture  Trustee,  or exercising any trust or power conferred
on the Indenture  Trustee by this Indenture;  provided that such direction shall
not be  otherwise  than  in  accordance  with  law and  the  provisions  of this
Indenture and the Indenture Trustee shall have received,  to the extent provided
in Sections 7.08 and 9.03 and Article XI hereof, such reasonable indemnification
as it may require against the costs,  expenses and liabilities to be incurred by
the Indenture  Trustee;  and provided further that (subject to the provisions of
Section 9.02 hereof) the  Indenture  Trustee  shall have the right to decline to
follow any such  direction if the Indenture  Trustee,  being advised by counsel,
shall  determine  that the action or  proceeding so directed may not lawfully be
taken or if the Indenture  Trustee in good faith by its board of directors,  the
executive  committee,  or a trust committee of directors or Responsible Officers
of the  Indenture  Trustee shall  determine  that the action or  proceedings  so
directed  would  involve the Indenture  Trustee in personal  liability or if the
Indenture  Trustee  in good  faith  shall  so  determine  that  the  actions  or
forebearances  specified  in or  pursuant  to such  direction  shall  be  unduly
prejudicial  to the  interests  of  Holders  not  joining  in the giving of said
direction,  it being  understood  that  (subject  to Section  9.02  hereof)  the
Indenture Trustee shall have no duty to ascertain whether or not such actions or
forebearances are unduly prejudicial to such Holders.

         Nothing  in this  Indenture  shall  impair  the right of the  Indenture
Trustee in its  discretion  to take any action  deemed  proper by the  Indenture
Trustee and which is not  inconsistent  with the  direction  by the  Majority in
Interest of Certificate Holders.

         Section  7.11.   Waiver  of  Past  Indenture   Default.   Upon  written
instructions from the Majority in Interest of Certificate Holders, the Indenture
Trustee shall waive any past Indenture Default and its consequences and upon any
such waiver such Indenture  Default shall cease to exist and any Indenture Event
of  Default  arising  therefrom  shall be deemed  to have  been  cured for every
purpose of this Indenture,  but no such waiver shall extend to any subsequent or
other  Indenture  Default  or impair  any right  consequent  thereon;  provided,
however,  that in the absence of written  instructions from all Holders and each
Liquidity Provider,  the Indenture Trustee shall not waive any Indenture Default
(a) in the  payment  of the  principal  of or  Make-Whole  Premium,  if any,  or
interest on, or other amounts due under,  any Certificate then  Outstanding,  or
(b) in respect of a covenant or provision of this Indenture which, under Article
XIII hereof, cannot be modified or amended without the consent of each Holder.

         Section 7.12. Notice of Indenture Default.  The Indenture Trustee shall
transmit to the Owner Trustee,  the Holders and to any Owner Participant  notice
of any  Indenture  Defaults  actually  known  to a  Responsible  Officer  of the
Indenture  Trustee,  such notice to be transmitted by mail to the Holders within
90 days, and to the Owner Trustee and any Owner  Participant  promptly after the
occurrence  thereof,  unless such Indenture Default shall have been cured before
the giving of such notice;  provided that except in the case of a default in the
payment  of  the  principal  of  or  interest  on  any  Certificate,   under  no
circumstances  shall the Indenture Trustee give such notice to the Holders until
the  expiration  of a period of 60 days from the  occurrence  of such  Indenture
Default; and provided further that, except in the case of default in the payment
of the  principal  of or  interest  on or any other  amount due under any of the
Certificates,  the  Indenture  Trustee  shall be protected in  withholding  such
notice to the Holders if and so long as the board of  directors,  the  executive
committee,  or a trust  committee of directors  or trustees  and/or  Responsible
Officers of the Indenture  Trustee in good faith determines that the withholding
of such notice is in the interests of the Holders.


                                  ARTICLE VIII

                           RIGHTS OF THE OWNER TRUSTEE
                            AND THE OWNER PARTICIPANT


         Section 8.01.  Certain  Rights of Owner Trustee and Owner  Participant.
(a)  Subject to  Section  13.01  hereof  and the  provisions  of  paragraph  (a)
immediately  following  the  Granting  Clause  hereof,  without the consent of a
Majority in Interest  of  Certificate  Holders,  the  respective  parties to the
Indenture Documents may not modify,  amend or supplement any of said agreements,
or give any  consent,  waiver,  authorization  or approval  thereunder,  for the
purpose of adding any provisions to or changing in any manner or eliminating any
of the  provisions  thereof  or of  modifying  in any  manner  the rights of the
respective parties thereunder;  provided, however, that the actions specified in
subsection  (b) of this  Section  8.01,  the actions  specified  in Section 2.18
hereof,  and the amendments  contemplated  by Section 2.03 of the  Participation
Agreement  (subject to the  limitations  set forth therein) may be taken without
the consent of the Indenture Trustee or any Holder.

         (b) Subject to the  provisions of subsection  (c) of this Section 8.01,
the Lessor and the respective  parties to the Indenture  Documents,  at any time
and from time to time,  without the consent of the  Indenture  Trustee or of any
Holder, may:

                  (1) so  long as no  Indenture  Event  of  Default  shall  have
         occurred and be continuing,  modify,  amend or supplement the Lease, or
         give any waiver with respect  thereto,  except that without  compliance
         with subsection (a) of this Section 8.01 the parties to the Lease shall
         not modify, amend or supplement,  or give any waiver for the purpose of
         adding any provisions to or changing in any manner or  eliminating  any
         of the  provisions  thereof or of modifying in any manner the rights of
         the  respective  parties  thereunder,  with  respect  to the  following
         provisions  of the  Lease as in effect on the  effective  date  hereof:
         Sections 2, 3(c) (except to the extent such Section  relates to amounts
         payable  (whether  directly or pursuant to this  Indenture)  to Persons
         other than Holders,  each Liquidity  Provider,  the Subordination Agent
         and the  Indenture  Trustee in its  individual  capacity),  3(e),  3(f)
         (except insofar as it relates to the address or account  information of
         the  Owner  Trustee  or the  Indenture  Trustee)  (other  than  as such
         Sections 3(c), 3(e) and 3(f) may be amended pursuant to Section 3(d) of
         the Lease as in effect on the effective date hereof), 3(g) (except that
         further restrictions may be imposed on the Lessee), 4, 6, 8, 10 (except
         in order to increase the Lessee's  liabilities  or enhance the Lessor's
         rights  thereunder),  11 (except that  additional  requirements  may be
         imposed on the  Lessee),  12 (except for Section  12(e) and except that
         additional  insurance  requirements  may be imposed on the Lessee),  14
         (except to impose  additional or more stringent Events of Default),  15
         (except to impose additional remedies), 20 (except to impose additional
         requirements on the Lessee), 23(f), and 26, and any definition of terms
         used  in the  Lease,  to the  extent  that  any  modification  of  such
         definition  would result in a  modification  of the Lease not permitted
         pursuant to this subsection (b); provided that the parties to the Lease
         may take any such action  without the consent of the Indenture  Trustee
         or any  Holder to the extent  such  action  relates  to the  payment of
         amounts constituting,  or the Owner Trustee's,  the Owner Participant's
         or the  Lessee's  rights  or  obligations  with  respect  to,  Excepted
         Payments  (other  than the  place,  time and  manner of  payment of any
         portion of Basic Rent constituting an Excepted Payment);

                  (2) modify,  amend or supplement  the Trust  Agreement and any
         other Indenture  Document  (other than the Lease and the  Participation
         Agreement), or give any consent, waiver, authorization or approval with
         respect thereto,  in each case only to the extent any such action shall
         not materially adversely impact the interests of the Holders;

                  (3) modify,  amend or supplement the Participation  Agreement,
         or give any consent,  waiver,  authorization  or approval  with respect
         thereto,  except that without  compliance  with  subsection (a) of this
         Section  8.01 the  parties  to the  Participation  Agreement  shall not
         modify, amend or supplement, or give any consent, waiver, authorization
         or approval for the purpose of adding  provisions to or changing in any
         manner or eliminating any of the provisions  thereof or of modifying in
         any  manner  the  rights of the  respective  parties  thereunder,  with
         respect to the following  provisions of the Participation  Agreement as
         in effect on the effective date hereof:  Article 6 and Section 10.01(b)
         (insofar as such Article 6 and Section 10.01(b) relate to the Indenture
         Trustee,  the  Pass-Through  Trustee  and the  Holders),  Article 7 and
         Sections 3.05, 15.01,  17.02 and 17.10 and Articles 8 and 9 (insofar as
         such Articles relate to the Indenture Trustee; it being understood that
         only  the  Indenture  Trustee's  consent  in  respect  thereof  need be
         obtained)  and  any  definition  of  terms  used  in the  Participation
         Agreement, to the extent that any modification of such definition would
         result in a modification of the  Participation  Agreement not permitted
         pursuant to this subsection (b); and

                  (4) modify,  amend or  supplement  any of said  agreements  in
         order to cure any  ambiguity,  to correct or supplement  any provisions
         thereof which may be defective or inconsistent with any other provision
         thereof or of any  provision  of this  Indenture,  or to make any other
         provision  with respect to matters or questions  arising  thereunder or
         under  this  Indenture  which  shall  not  be  inconsistent   with  the
         provisions  of this  Indenture,  provided  the making of any such other
         provision shall not adversely affect the interests of the Holders.

         (c)  No   modification,   amendment,   supplement,   consent,   waiver,
authorization  or  approval  with  respect  to the  Lease  or the  Participation
Agreement, whether effected pursuant to subsection (a) or pursuant to subsection
(b) of this Section 8.01 and anything in such  subsections  or elsewhere in this
Indenture to the  contrary  notwithstanding,  shall,  without the consent of the
Holder of each  Outstanding  Certificate  affected  thereby,  and each Liquidity
Provider,

                  (1) modify,  amend or supplement the Lease in such a way as to
         extend the time of payment  of Basic Rent or  Stipulated  Loss Value or
         Supplemental  Rent payable to the Holders or any Liquidity  Provider or
         any  other  amounts  payable  for the  account  of the  Holders  or any
         Liquidity  Provider (subject in any event to Section 3(e) of the Lease)
         upon the  occurrence of an Event of Loss or  Termination  Value and any
         other  amounts  payable for the account of the Holders  (subject in any
         event to Section 3(e) of the Lease) upon  termination of the Lease with
         respect to the Aircraft  payable under, or as provided in, the Lease as
         in effect on the  effective  date  hereof,  or reduce the amount of any
         installment of Basic Rent or Supplemental Rent so that the same is less
         than the payment of principal of, and interest on the  Certificates and
         Make-Whole Premium, if any, and amounts due to each Liquidity Provider,
         as the case may be, to be made from such  installment  of Basic Rent or
         Supplemental  Rent, or reduce the aggregate  amount of Stipulated  Loss
         Value, or any other amounts payable under, or as provided in, the Lease
         as in  effect  on  the  date  of  the  Indenture  Supplement  upon  the
         occurrence  of an  Event  of Loss so that  the  same is less  than  the
         accrued  interest on and the  principal as of the Loss Payment Date, of
         the  Certificates  at the time  Outstanding  or  reduce  the  amount of
         Termination  Value and any other amounts  payable under, or as provided
         in, the Lease as in effect on the date of the Indenture Supplement upon
         termination  of the Lease with respect to the Aircraft so that the same
         is less than the  accrued  interest  on and  principal  as of the Lease
         Termination Date and Make-Whole Premium, if any, of Certificates at the
         time Outstanding, or

                  (2) modify, amend or supplement the Lease in such a way as to,
         or consent to any assignment of the Lease or give any consent,  waiver,
         authorization  or  approval  which  would,  release the Lessee from its
         absolute and  unconditional  obligations in respect of payment of Basic
         Rent or  Supplemental  Rent,  or  Stipulated  Loss  Value and any other
         amounts payable for the account of the Holders (subject in any event to
         Section 3(e) of the Lease) upon the  occurrence of an Event of Loss, or
         Termination  Value and any other amounts payable for the account of the
         Holders  (subject  in any  event to  Section  3(e) of the  Lease)  with
         respect to the Aircraft, payable under, or as provided in, the Lease as
         in effect on the date of the Indenture Supplement,  except for any such
         assignment  pursuant to Section 2.12 hereof,  and except as provided in
         the Lease as in effect on the date of the Indenture Supplement.

         (d) At all times so long as this Indenture is in effect, the consent of
the Owner Trustee (at the direction of the Owner  Participant) shall be required
in order (i) to amend,  modify or  supplement  the Lease or any other  Operative
Document  to which the Owner  Trustee is a party or to waive  compliance  by the
Lessee  with any of its  obligations  thereunder  and (ii) to grant any  consent
requested under the Lease.

Notwithstanding  the  foregoing,  but subject always to the provision of Section
15.05 hereof,  the Indenture  Trustee shall at all times have the right,  to the
exclusion  of the Owner  Trustee and the Owner  Participant,  to (A) declare the
Lease to be in default  under  Section 15 (other  than with  respect to Excepted
Payments)  thereof and (B) subject  only to the  provisions  of this  Indenture,
exercise  the  remedies  set forth in  Section  15 of the Lease  (other  than in
connection with Excepted Payments) and in Article 7 hereof.

         Nothing  in this  Indenture  shall be  deemed  to  prohibit  the  Owner
Participant  or the Owner  Trustee from making demand on the Lessee for, or from
commencing an action at law to obtain the payment of, or from receiving  payment
of,  any  Excepted  Payment;  provided,  however,  that if the Owner  Trustee is
proceeding  under the Lease, the Owner Trustee shall proceed pursuant to Section
15(a)(5), and only Section 15(a)(5), of the Lease.

         Section  8.02.  Owner  Participant's  Right to Prepay or  Purchase  the
Certificates.  (a) If  (i) an  Event  of  Default  shall  have  occurred  and be
continuing  or (ii) the Indenture  Trustee shall have taken action,  or notified
the Owner  Participant that it intends to take action,  to foreclose the Lien of
this  Indenture or otherwise  commence  the exercise of any  significant  remedy
under  Section 7.02 of this  Indenture or Section 15 of the Lease,  or (iii) the
Certificates  shall have become due and payable  pursuant to Section  7.02(b) or
(c) hereof,  the Owner  Participant (or the Owner Trustee on behalf of the Owner
Participant)  may,  but  shall  be  under  no  obligation  to do  either  of the
following:

         (1) direct the Owner  Trustee to cause the  prepayment  of all, but not
less than all, of the  Certificates  then Outstanding by notifying the Indenture
Trustee of such election, which notice in order to be effective shall state that
it is irrevocable  (except as provided  below) and shall  designate a Prepayment
Date which  shall be a Business  Day which  shall be not less than 15 days after
the date of such notice on which the Owner Trustee shall, in the manner provided
for in Section 6.04 hereof, deposit the sum of amounts contemplated by paragraph
"first" under Section 5.03 and the aggregate  Prepayment  Price  (determined  in
accordance  with  Section  6.02(b)  hereof)  of all such  Certificates  with the
Indenture Trustee. If such payment by the Owner Trustee to the Indenture Trustee
is made,  the  Certificates  shall cease to accrue  interest  from and after the
Prepayment  Date,  and after  distribution  of such payment to the Holders,  the
Indenture Trustee shall release the Trust Indenture Estate from the Lien of this
Indenture; or

         (2)  purchase   all,  but  not  less  than  all,  of  the   Outstanding
Certificates by notifying the Indenture  Trustee of such election,  which notice
in order to be effective shall state that it is irrevocable  (except as provided
below) and shall  designate a date which shall be a Business  Day which shall be
not less than 15 days after the date of such  notice on which the Owner  Trustee
shall pay to the  Indenture  Trustee  an amount  equal to the  aggregate  unpaid
principal amount of all Outstanding Certificates, together with accrued interest
on such  amount to the date of  purchase,  plus all other sums due any Holder or
the  Indenture  Trustee  hereunder or under the  Participation  Agreement or the
Lease, but without any Make-Whole  Premium (provided that the Make-Whole Premium
shall be included if the purchase is made  pursuant to clause  (a)(i) above (but
not  pursuant  to clause  (a)(ii) or  (a)(iii)  above) when the Event of Default
shall have occurred and been continuing for less than 180 days). Upon receipt by
the Indenture Trustee of such amount, each Holder will be deemed, whether or not
Certificates shall have been delivered to the Indenture Trustee on such date, to
have thereupon sold, assigned, transferred and conveyed (and shall promptly take
such actions as the Owner Participant shall reasonably  request to evidence such
sale,  assignment,  transfer and conveyance) to the Owner  Participant  (without
recourse or  warranty  of any kind  except for its own acts),  all of the right,
title and interest of such Holder in and to the Trust Indenture  Estate and this
Indenture and all Certificates  held by such Holder and the former Holders shall
not be  entitled  to  receive  any  interest  on the  principal  amount  of such
Certificates  after the purchase date, and the Owner Participant shall be deemed
to have  assumed  (and shall  promptly  take such  actions  as any Holder  shall
reasonably request to evidence such assumption) all of such Holder's obligations
under the Participation  Agreement and this Indenture arising subsequent to such
sale. If the Owner  Trustee  shall so request,  such Holder will comply with all
the provisions of Section 2.06 of this Indenture to enable new  Certificates  to
be issued to the Owner Participant in such authorized denominations as the Owner
Participant shall request. All charges and expenses required pursuant to Section
2.06 hereof in connection with the issuance of any such new  Certificates  shall
be borne by the Owner Participant.

         (b) From and after the deposit by the Owner  Trustee of the  applicable
Prepayment  Price or  purchase  price with the  Indenture  Trustee  pursuant  to
Section  8.02(a)  hereof,  the Owner  Trustee  shall be entitled to exercise all
remedies of the  Indenture  Trustee  under  Article VII hereof as well as of the
Lessor under the Lease.

         (c) Any  election to prepay or  purchase  the  Certificates  under this
Section 8.02 shall be  irrevocable,  provided that if on the specified  date for
prepayment or purchase,  the Event of Default giving rise to such election shall
no longer be  continuing  under the Lease  such  election  shall be deemed to be
automatically withdrawn.

         Section 8.03.  Certain  Rights of Owner  Participant.  (a) If (A) there
shall  occur an Event of  Default  under the  Lease as a result of the  Lessee's
failure to make any payment of an  installment  of Basic Rent, and (B) the Owner
Trustee shall have paid or caused to be paid on or prior to the date which is 15
Business Days after the Owner  Participant's  receipt of written  notice of such
Event of Default all  principal  and interest on the  Certificates  then due (as
well as any  interest  on  overdue  principal  and (to the extent  permitted  by
applicable law) interest),  but not including any principal or interest becoming
due on account of such Event of Default,  then the failure of the Lessee to make
the payment of such  installment of Basic Rent or of interest on account of such
installment's being overdue shall not constitute or result in an Indenture Event
of Default  under this  Indenture and any  declaration  based solely on the same
shall  be  deemed  to be  automatically  rescinded.  Nothing  contained  in  the
preceding  sentence shall be deemed to entitle the Owner Trustee to exercise any
rights and powers or pursue any remedies  pursuant to Article 15 of the Lease or
otherwise  except  as set forth in this  Indenture,  and  except  that the Owner
Trustee or the Owner Participant may attempt to recover any amount paid by it or
them under this Indenture by demanding of the Lessee payment of such amount,  or
by commencing  an action at law or equity  against the Lessee for the payment of
such amount or taking  appropriate action in a pending action at law against the
Lessee  pursuant to Section  15(a)(5),  but only said Section  15(a)(5),  of the
Lease.  Upon curing any such Event of Default pursuant to this Section 8.03, the
Owner Trustee or the Owner Participant,  as the case may be, shall be subrogated
on an unsecured basis to all the rights of the Indenture Trustee under the Lease
in respect of the payment giving rise to such Event of Default, and any right to
any  interest  in respect of the same,  and shall be  entitled to any payment of
Basic Rent (or interest  thereon) actually made by the Lessee in respect of such
cured  payment  upon receipt by the  Indenture  Trustee;  provided  that no such
amount  shall be paid to the Owner  Trustee or the Owner  Participant  until all
amounts then due and payable to each Certificate Holder hereunder and thereunder
shall  have been  paid in full and no  Indenture  Event of  Default  shall  have
occurred and be  continuing.  Notwithstanding  anything in this Indenture or the
Lease to the contrary, the Owner Participant and the Owner Trustee collectively,
shall not be  entitled  to cure more than six  Events of  Default  (no more than
three of which may be  consecutive)  occasioned  by  defaults  in the payment of
Basic Rent.

         (b) If (A) there  shall  occur an Event of Default  under the Lease for
any reason other than the Lessee's failure to make any payment of an installment
of Basic Rent and (B) the Owner  Trustee  shall have taken or caused to be taken
such action  necessary to cure and shall have cured such Event of Default  prior
to the date which is 15 Business Days after the Owner  Participant's  receipt of
the written  notice of such Event of Default,  then the failure of the Lessee to
perform such covenant,  condition or agreement, the observance or performance of
which was  accomplished  by the Owner Trustee  hereunder shall not constitute or
result in an Indenture Event of Default under this Indenture and any declaration
based solely on the same shall be deemed to be automatically rescinded.  Nothing
contained in the preceding sentence shall be deemed to entitle the Owner Trustee
or the Owner  Participant  to  exercise  any  rights  and  powers or pursue  any
remedies pursuant to Section 15 of the Lease or otherwise except as set forth in
this Indenture,  and except that the Owner Trustee or the Owner  Participant may
attempt  to  recover  any amount  paid by it or them in  effecting  such cure by
demanding  of the Lessee  payment of such amount,  plus any interest  due, or by
commencing  an action at law or in equity  against the Lessee for the payment of
such amount or taking appropriate action in a pending action at law or in equity
against the Lessee pursuant to Section 15(a)(5),  but only Section 15(a)(5),  of
the  Lease.  Upon  curing any such Event of  Default  pursuant  to this  Section
8.03(b),  the Owner Trustee or the Owner Participant,  as the case may be, shall
be  subrogated  to all the rights of the  Indenture  Trustee  under the Lease in
respect of the  payment,  agreement  or  covenant  giving  rise to such Event of
Default,  and any right to any  interest  in respect  of the same,  and shall be
entitled  to any  payment or other  performance  upon  receipt by the  Indenture
Trustee;  provided that no such amount shall be paid to the Owner Trustee or the
Owner  Participant  until all amounts  then due and payable to each  Certificate
Holder  hereunder and  thereunder  shall have been paid in full and no Indenture
Event of Default shall have occurred and be continuing.


                                   ARTICLE IX

                        CONCERNING THE INDENTURE TRUSTEE

         Section  9.01.  Acceptance  of  Trusts.  The  Indenture  Trustee in its
individual capacity hereby accepts the trusts imposed upon it by this Indenture,
and covenants  and agrees to perform the same as expressed  herein and agrees to
receive and disburse all moneys  constituting part of the Trust Indenture Estate
in accordance with the terms hereof.

         Section 9.02 Duties Before, and During, Existence of Indenture Event of
Default.  (a) The  Indenture  Trustee,  prior to the  occurrence of an Indenture
Event of Default  and after the curing or  waiving  of all  Indenture  Events of
Default which may have occurred, undertakes to perform such duties and only such
duties as are specifically set forth in this Indenture.  So long as an Indenture
Event of Default has  occurred and has not been cured or waived,  the  Indenture
Trustee  shall  exercise  such of the  rights  and  powers  vested in it by this
Indenture,  and use the same  degree of care and skill in their  exercise,  as a
prudent man would exercise or use under the  circumstances in the conduct of his
own affairs.  No provision of this  Indenture  shall be construed to relieve the
Indenture Trustee from liability for its own negligent action, its own negligent
failure to act or its own willful misconduct, except that:

         (i) prior to the occurrence of an Indenture  Event of Default and after
the  curing  or  waiving  of all  Indenture  Events  of  Default  which may have
occurred:

                  (x) the duties and obligations of the Indenture  Trustee shall
         be determined solely by the express  provisions of this Indenture,  and
         the Indenture Trustee shall not be liable except for the performance of
         such  duties  and  obligations  as are  specifically  set forth in this
         Indenture,  and no implied covenants or obligations shall be read in to
         this Indenture against the Indenture Trustee; and

                  (y) in the  absence of bad faith on the part of the  Indenture
         Trustee,  the Indenture Trustee may conclusively  rely, as to the truth
         of  the  statements  and  the  correctness  of the  opinions  expressed
         therein, upon any statements, certificates or opinions furnished to the
         Indenture Trustee and conforming to the requirements of this Indenture;
         but in the case of any such  statements,  certificate or opinions which
         by any provision  hereof are  specifically  required to be furnished to
         the Indenture  Trustee,  the Indenture Trustee shall be under a duty to
         examine  the  same to  determine  whether  or not they  conform  to the
         requirements of this Indenture;

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

         (iii) the  Indenture  Trustee  shall not be liable with  respect to any
action taken or not taken by it in good faith in  accordance  with the direction
of the  Holders of not less than a majority  in  aggregate  principal  amount of
Outstanding  Certificates  relating to the time,  method and place of conducting
any proceeding for any remedy available to the Indenture Trustee,  or exercising
any trust or power conferred upon the Indenture Trustee, under this Indenture.

         None of the provisions  contained in this  Indenture  shall require the
Indenture  Trustee to expend or risk its own funds or otherwise  incur  personal
financial  liability in the  performance of any of its duties or in the exercise
of any of its rights or powers,  if the Indenture  Trustee shall have determined
in good faith that the  repayment  of such funds or adequate  indemnity  against
such liability is not reasonably assured to it.

         The Indenture Trustee agrees that it will execute and the Owner Trustee
agrees that it will,  at the  expense of the  Lessee,  file or cause to be filed
such continuation  statements with respect to financing  statements  relating to
the security  interest created hereunder in the Trust Indenture Estate as may be
specified from time to time in written  instructions  of the Holders of not less
than 25% in aggregate  principal amount of Certificates (which instructions may,
by  their  terms,  be  operative  only at a  future  date  and  which  shall  be
accompanied  by the  execution  form of  such  continuation  statement  so to be
filed); provided that,  notwithstanding the foregoing, the Indenture Trustee may
execute and file or cause to be filed any financing statement which it from time
to time deems appropriate.

         (b) If any Event of Default shall have occurred and be continuing  and,
after the latest date on which the Owner  Trustee may cure such Event of Default
pursuant to Section 8.03 hereof,  on request of the Holders of not less than 25%
in aggregate  principal  amount of outstanding  Certificates  (unless  otherwise
instructed  by a greater  percentage)  and  subject to  indemnification,  to the
extent  provided  in  Sections  7.08 and 9.03 and  Article XI hereof,  as it may
require  against  the  costs,  expenses  and  liabilities  to be  incurred,  the
Indenture  Trustee shall exercise such remedies under Section 15 of the Lease as
shall be specified in such request.

         (c) The  Indenture  Trustee  agrees  that it  will,  in its  individual
capacity  and at its own cost and expense (but without any right of indemnity in
respect of any such cost or expense  under  Article XI hereof or under any other
Operative  Agreement)  promptly  take such  action as may be  necessary  duly to
discharge  all  Indenture  Trustee's  Liens on any part of the  Trust  Indenture
Estate.

         (d) The  Indenture  Trustee  will execute and deliver to the Lessee for
filing  in  accordance  with  Section  20 of the Lease  any  properly  presented
document,  instrument or financing or  continuation  statement  specified in any
opinion delivered  pursuant to Section 6.03(e) of the  Participation  Agreement.
The Indenture  Trustee may rely on the act of presentation of any such document,
instrument,  financing or continuation  statement as evidencing the fact that it
is properly  prepared and presented,  provided that the Indenture  Trustee shall
promptly  correct  any  error in any such  document,  instrument,  financing  or
continuation  statement of which a Responsible  Officer of the Indenture Trustee
has actual knowledge.

         (e) The  Indenture  Trustee will furnish to each Holder  promptly  upon
receipt  thereof,  duplicates  or  copies  of all  reports,  notices,  requests,
demands,  certificates,  financial statements and other instruments furnished to
the Indenture Trustee, to the extent that the same shall not have been otherwise
furnished  to such  Holder  pursuant  to this  Indenture  or to the  extent  the
Indenture  Trustee  does not  reasonably  believe  that the same shall have been
furnished by the Lessee directly to such Holder.

         Section 9.03.     Certain Rights of the Indenture Trustee. Subject to Section 9.02 hereof:

         (a) the Indenture  Trustee may rely and shall be protected in acting or
refraining from acting upon any resolution,  Officer's  Certificate or any other
certificate,  statement,  instrument, opinion, report, notice, request, consent,
order,  bond,  debenture,  note,  coupon,  security  or other  paper or document
believed by it 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  Owner  Trustee
mentioned  herein shall be  sufficiently  evidenced by an Officer's  Certificate
(unless other  evidence in respect  thereof be herein  specifically  prescribed)
upon which the  Indenture  Trustee  may rely to prove or  establish a matter set
forth therein;

         (c) the  Indenture  Trustee may consult  with counsel and any advice or
Opinion of Counsel shall be full and complete  authorization  and  protection in
respect of any action taken,  suffered or omitted to be taken by it hereunder in
good faith and in accordance with such advice or Opinion of Counsel;

         (d) the Indenture  Trustee shall be under no obligation to exercise any
of the trusts or powers vested in it by this Indenture at the request,  order or
direction of any of the Holders  pursuant to the  provisions of this  Indenture,
unless such  Holders  shall have  offered to the  Indenture  Trustee  reasonable
security or indemnity against the costs, expenses and liabilities which might be
incurred therein or thereby;

         (e) the  Indenture  Trustee shall not be liable for any action taken or
omitted by it in good faith and  believed by it to be  authorized  or within the
discretion, rights or powers conferred upon it by this Indenture;

         (f) prior to the occurrence of an Indenture Event of Default  hereunder
and after  the  curing or  waiving  of all  Indenture  Events  of  Default,  the
Indenture Trustee shall not be bound to make any investigation into the facts or
matters stated in any resolution,  certificate,  statement, instrument, opinion,
report, notice, request, consent, order, approval,  appraisal,  bond, debenture,
note, coupon,  security,  or other paper or document unless requested in writing
to do so by the Majority in Interest of Certificate  Holders;  provided that, if
the payment  within a  reasonable  time to the  Indenture  Trustee of the costs,
expenses  or  liabilities  likely  to be  incurred  by it in the  making of such
investigation  is, in the  opinion  of the  Indenture  Trustee,  not  reasonably
assured to the Indenture  Trustee by the security afforded to it by the terms of
this Indenture,  the Indenture Trustee may require reasonable  indemnity against
such costs, expenses or liabilities as a condition to proceeding; the reasonable
expenses  of every such  examination  shall be paid by the Owner  Trustee or, if
paid by the Indenture Trustee or any predecessor trustee, shall be repaid by the
Owner Trustee upon demand; and

         (g) the  Indenture  Trustee  may  execute  any of the  trusts or powers
hereunder  or perform  any duties  hereunder  either  directly  or by or through
agents or attorneys not regularly in its employ and the Indenture  Trustee shall
not be  responsible  for any  misconduct  or  negligence on the part of any such
agent or attorney appointed with due care by it hereunder.

         Section  9.04.   Indenture   Trustee  Not   Responsible  for  Recitals,
Certificates,  or Proceeds.. The Indenture Trustee assumes no responsibility for
the correctness of the recitals contained herein and in the Certificates, except
the Indenture  Trustee's  certificates of authentication.  The Indenture Trustee
makes no  representation  as to the validity or sufficiency of this Indenture or
of the Certificates.  The Indenture Trustee shall not be accountable for the use
or  application  by the  Owner  Trustee  of any  of the  Certificates  or of the
proceeds thereof.

         Section  9.05.  Indenture  Trustee  and Agents  May Hold  Certificates;
Collections, etc. The Indenture Trustee or any agent of the Indenture Trustee in
its  individual  or any  other  capacity  may  become  the owner or  pledgee  of
Certificates  with the same  rights it would  have if it were not the  Indenture
Trustee or such agent and may otherwise deal with the Owner Trustee and receive,
collect, hold and retain collections from the Owner Trustee with the same rights
it would have if it were not the Indenture Trustee or such agent.

         Section  9.06.  Moneys Held by Indenture  Trustee.  Subject to Sections
5.08  hereof and 14.04  hereof,  all moneys  received by the  Indenture  Trustee
shall,  until  used or  applied  as  herein  provided,  be held in trust for the
purposes for which they were  received,  but need not be  segregated  from other
funds except to the extent required by mandatory  provisions of law. Neither the
Owner Trustee nor, subject to Section 5.08 hereof, the Indenture Trustee nor any
agent thereof  shall be under any liability for interest on any moneys  received
by it hereunder.

         Section  9.07.  Right  of  Indenture   Trustee  to  Rely  on  Officer's
Certificate,  etc.  Subject to Sections  9.02 and 9.03  hereof,  whenever in the
administration  of the trusts of this Indenture the Indenture Trustee shall deem
it necessary or desirable that a matter be proved or established prior to taking
or  suffering  or  omitting  any action  hereunder,  such matter  (unless  other
evidence  in respect  thereof be  specifically  prescribed  herein)  may, in the
absence  of bad  faith on the part of the  Indenture  Trustee,  be  deemed to be
conclusively proved and established by an Officer's Certificate delivered to the
Indenture Trustee, and such certificate, in the absence of bad faith on the part
of the Indenture Trustee, shall be full warrant to the Indenture Trustee for any
action taken,  suffered or omitted by it under the  provisions of this Indenture
upon the faith thereof.

         Section 9.08.  Replacement  Airframes and Replacement  Engines.  At any
time and from time to time any  Airframe or Engine  may,  or is required  to, be
replaced  under  Section  3(i),  11(a),  or 11(b) of the Lease by a  Replacement
Airframe  or  Replacement  Engine,  as the case may be,  shall  be  replaced  in
accordance  with the  provisions of this Section 9.08 and the provisions of such
Sections of the Lease,  the Owner Trustee shall,  from time to time,  direct the
Indenture  Trustee to execute  and  deliver to or as  directed in writing by the
Owner Trustee an appropriate instrument releasing such Airframe and/or Engine as
appropriate  from the Lien of this  Indenture  and the  Indenture  Trustee shall
execute and deliver such instrument as aforesaid  without  recourse or warranty,
but only upon receipt by or deposit with the Indenture Trustee of the following:

         (1) A written  request from the Owner Trustee  requesting  such release
and specifically describing the Airframe and/or Engine(s) to be so released.

         (2) A  certificate  signed by a duly  authorized  officer of the Lessee
stating the following:

         A.       With respect to the replacement of any Airframe:

                  (i) a description of the Airframe subject to the Event of Loss
         including the  manufacturer,  model, FAA registration  number (or other
         applicable registration information) and manufacturer's serial number;

                  (ii) a description of the Replacement Airframe,  including the
         manufacturer,  model,  FAA  registration  number  (or other  applicable
         registration information) and manufacturer's serial number;

                  (iii)  that on the date of the  supplement  to this  Indenture
         relating to the  Replacement  Airframe  the Owner  Trustee  will be the
         legal owner of and have good title to such  Replacement  Airframe  free
         and clear of all Liens except Liens  permitted  under  Section 8 of the
         Lease, that such Replacement  Airframe will on such date be in at least
         as good operating  condition and repair as required by the terms of the
         Lease,  and that such Replacement  Airframe has been or,  substantially
         concurrently with such replacement, will be duly registered in the name
         of the Owner  Trustee  under the  Transportation  Code or under the law
         then  applicable  to the  registration  of the Airframe  subject to the
         Event of Loss  and  that an  airworthiness  certificate  has been  duly
         issued  under the  Aviation  Act (or such  other  applicable  law) with
         respect to such  Replacement  Airframe and that such  registration  and
         certificate  is, or will be, in full  force  and  effect,  and that the
         Lessee will have the full right and  authority to use such  Replacement
         Airframe;

                  (iv) that the insurance required by Section 12 of the Lease is
         in full force and effect with respect to such Replacement Airframe;

                  (v)  that  the  Replacement  Airframe  is of  the  same  or an
         improved  make or model as the Airframe  requested to be released  from
         this Indenture;

                  (vi) that the value of the Replacement Airframe as of the date
         of  such  certificate  is not  less  than  the  value  of the  Airframe
         requested to be released  (assuming  such Airframe was in the condition
         and repair required to be maintained under the Lease);

                  (vii) that no Event of Default exists or would result from the
         making and  granting of the  request for release and the  addition of a
         Replacement Airframe;

                  (viii) that the release of the  Airframe  subject to the Event
         of Loss will not impair the security of the Indenture in  contravention
         of any of the provisions of this Indenture;

                  (ix) that upon such  replacement,  the Lien of this  Indenture
         will apply to the  Replacement  Airframe  and such Lien will be a first
         priority security interest in favor of the Indenture Trustee; and

                  (x) that each of the conditions  specified in Section 11(a)(1)
         of the  Lease  with  respect  to such  Replacement  Airframe  has  been
         satisfied.

         B.       With respect to the replacement of any Engine:

                  (i)      a description of the Engine  subject to the Event of Loss  including the  manufacturer's
         serial number;

                  (ii) a description  of the  Replacement  Engine  including the
         manufacturer's name, the engine model and serial number;

                  (iii)  that on the date of the  supplement  to this  Indenture
         relating to the Replacement  Engine the Owner Trustee will be the legal
         owner of such  Replacement  Engine  free and clear of all Liens  except
         Liens permitted under Section 8 of the Lease, and that such Replacement
         Engine will on such date be in at least as good operating condition and
         repair as required by the terms of the Lease and will otherwise conform
         to the  requirements  set  forth  in  the  definition  of  "Replacement
         Engine";

                  (iv) that the value of the  Replacement  Engine as of the date
         of such  certificate  is not less  than the  value of the  Engine to be
         released  (without  regard to the  number of hours or cycles  remaining
         until the next scheduled  maintenance  visit,  and assuming such Engine
         was in the  condition and repair  required to be  maintained  under the
         Lease);

                  (v) that the  release  of the  Engine  subject to the Event of
         Loss will not impair the security of the Indenture in  contravention of
         any of the provisions of this Indenture;

                  (vi) that upon such  replacement,  the Lien of this  Indenture
         will  apply to the  Replacement  Engine  and such  Lien will be a first
         priority security interest in favor of the Indenture Trustee; and

                  (vii)    that each of the  conditions  specified  in  Section  11(a) or 11(b) of the  Lease  with
         respect to such Replacement Engine has been satisfied.

         (3) The appropriate  instruments (i)  transferring to the Owner Trustee
title to the  Replacement  Airframe  or  Replacement  Engine to be  received  as
consideration  for the Airframe or Engine to be released  and (ii)  assigning to
the Owner Trustee the benefit of all manufacturer's and vendor's warranties,  if
any,  generally   available  with  respect  to  such  Replacement   Airframe  or
Replacement  Engine,  and  a  supplement  to  this  Indenture   subjecting  such
Replacement  Airframe or  Replacement  Engine to the Trust  Agreement and to the
Lien of this Indenture.

         (4) A certificate  from a firm of  independent  aircraft  appraisers of
national standing reasonably satisfactory to the Indenture Trustee and the Owner
Trustee  confirming the accuracy of the information set forth in clause (2)A(vi)
of this Section 9.08.

         (5) The  opinions  of  Troutman  Sanders  LLP,  special  counsel to the
Lessee,  and of Special  Aviation  Counsel,  or (in either  case) other  counsel
reasonably satisfactory to the Indenture Trustee, stating that:

                  (i) the certificates,  opinions and other  instruments  and/or
         property  which have been or are  therewith  delivered to and deposited
         with  the  Indenture  Trustee  conform  to  the  requirements  of  this
         Indenture  and the Lease and, upon the basis of such  application,  the
         property so sold or disposed of may be properly  released from the Lien
         of this  Indenture and all  conditions  precedent  herein  provided for
         relating to such release have been complied with; and

                  (ii) the Replacement  Airframe or Replacement  Engine has been
         validly  subjected  to the Lien of this  Indenture  and  covered by the
         Lease,  the  instruments   subjecting  such  Replacement   Airframe  or
         Replacement  Engine to the Lease and to the Lien of this Indenture,  as
         the case may be, have been duly filed for  recordation  pursuant to the
         Transportation   Code  or  any  other  law  then   applicable   to  the
         registration  of  the  Aircraft,  and  no  further  action,  filing  or
         recording  of any  document  is  necessary  or  advisable  in  order to
         establish and perfect the title of the Owner Trustee to and the Lien of
         this Indenture on such Replacement  Airframe or Replacement  Engine and
         the Indenture Trustee would be entitled to the benefits of Section 1110
         of the  Bankruptcy  Code with respect to such  Replacement  Airframe or
         Replacement  Engine,  provided,  that such  opinion  need not be to the
         effect  specified  in the  foregoing  clause  to the  extent  that  the
         benefits  of such  Section  1110  would not have  been,  by reason of a
         change in law or  governmental  interpretation  thereof  after the date
         hereof, available to the Indenture Trustee with respect to the Aircraft
         immediately  prior  to such  substitution  had  such  Event of Loss not
         occurred.

         Section 9.09 Indenture Supplement for Replacements. In the event of the
substitution of a Replacement  Airframe or a Replacement  Engine as contemplated
by Section 11 of the Lease,  the Owner Trustee and the  Indenture  Trustee agree
for the benefit of the Holders and the  Lessee,  subject to  fulfillment  of the
conditions precedent and compliance by the Lessee with its obligations set forth
in  Section  11 of the  Lease,  to  execute  and  deliver a  supplement  to this
Indenture as contemplated  by Section  9.08(3) hereof and,  provided no Event of
Default shall have occurred and be continuing, execute and deliver to the Lessee
an appropriate  instrument  releasing the Airframe or Engine being replaced from
the Lien of this Indenture.

         Section 9.10.  Effect of Replacement.  In the event of the substitution
of a Replacement  Airframe or a Replacement Engine as contemplated by Section 11
of the Lease and Section 9.08 hereof,  all provisions of this Indenture relating
to the Airframe or Engine or Engines being  replaced shall be applicable to such
Replacement  Airframe or  Replacement  Engine or Engines with the same force and
effect as if such Replacement Airframe or Replacement Engine or Engines were the
same  Airframe  or engine or  engines,  as the case may be, as the  Airframe  or
Engine or Engines  being  replaced but for any Event of Loss with respect to the
Airframe or Engine or Engines being replaced.

         Section 9.11.  Compensation.  The Owner Trustee covenants and agrees to
pay,  and the  Indenture  Trustee  shall  be  entitled  to  receive,  reasonable
compensation and payment or reimbursement for its reasonable advances,  expenses
and  disbursements  (including  the  reasonable  compensation  and  expenses and
disbursements  of its  counsel,  agents and other  persons not  regularly in its
employ)  in  connection  with  its  services  rendered  hereunder  or in any way
relating to or arising out of the  administration  of the Trust Indenture Estate
and shall have a priority claim on the Trust Indenture Estate for the payment of
such compensation,  advances, expenses and disbursements to the extent that such
compensation,  advances,  expenses  and  disbursements  shall not be paid by the
Lessee, and shall have the right to use or apply any moneys held by it hereunder
in the Trust  Indenture  Estate toward such payments;  provided that, so long as
the  Lease is in  effect,  the  Indenture  Trustee  shall not make any claim for
payment under this Section 9.11 against the Owner  Trustee  without first making
demand on the Lessee for payment of such claim.  The  Indenture  Trustee  agrees
that it shall have no right  against any Holder,  SSB, or the Owner  Participant
for any fee as compensation for its services as trustee under this Indenture.


                                    ARTICLE X

                             CONCERNING THE HOLDERS

         Section  10.01.  Evidence of Action Taken by Holders.  (a) Any request,
demand,  authorization,  direction,  notice,  consent,  waiver  or other  action
provided  by this  Indenture  to be given or taken by Holders may be embodied in
and evidenced by one or more instruments of  substantially  similar tenor signed
by such Holders in person or by an agent duly appointed in writing,  and, except
as otherwise  expressly provided herein, such action shall become effective when
such  instrument or instruments  are delivered to the Indenture  Trustee and, if
expressly  required  herein,  to the Owner  Trustee.  Proof of  execution of any
instrument or of a writing appointing any such agent shall be sufficient for any
purpose  of this  Indenture  and  (subject  to  Sections  9.02 and 9.03  hereof)
conclusive in favor of the Indenture  Trustee and the Owner Trustee,  if made in
the manner provided in this Article.

         (b) For the  purpose of  determining  the  Holders  entitled to vote or
consent to any  direction,  waiver or other action of such Holders under Section
7.10 or 7.11  hereof,  the Lessee may set a record date for such vote or consent
by  specifying  such record date in an  Officer's  Certificate  delivered to the
Indenture Trustee.  Such record date shall be a date not more than 15 days prior
to the first solicitation of such vote or consent.

         Section  10.02.  Proof of  Execution of  Instruments  and of Holding of
Certificates.  Subject to Sections  9.02 and 9.03 hereof,  the  execution of any
instrument  by a Holder or his agent or proxy may be proved in  accordance  with
such  reasonable  rules and  regulations  as may be  prescribed by the Indenture
Trustee.  The holding of  Certificates  shall be proved by the  Register or by a
certificate of the Registrar.

         Section  10.03.   Holders  to  Be  Treated  as  Owners.  Prior  to  due
presentment for registration of transfer of any Certificate,  the Owner Trustee,
the Indenture Trustee,  any agent of the Owner Trustee or the Indenture Trustee,
the Paying Agent,  if any, the Registrar and the Lessee shall deem and treat the
Person in whose name such  Certificate  shall be registered upon the Register as
the absolute owner of such Certificate (whether or not such Certificate 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 and,
subject to the provisions of this  Indenture,  interest on such  Certificate and
for all other purposes;  and neither the Owner Trustee nor the Indenture Trustee
(nor any agent of the Owner  Trustee or the  Indenture  Trustee)  nor the Paying
Agent,  if any, nor the Registrar nor the Lessee shall be affected by any notice
to the  contrary.  All such  payments  so made to any such  person,  or upon his
order, shall be valid, and, to the extent of the sum or sums so paid,  effectual
to  satisfy  and  discharge  the  liability  for  moneys  payable  upon any such
Certificate.

         Section 10.04. Certificates Owned by Owner Trustee or Lessee Deemed Not
Outstanding.  In  determining  whether  the Holders of the  requisite  aggregate
principal  amount of  Certificates  have concurred in any direction,  consent or
waiver under this Indenture,  Certificates which are owned by the Owner Trustee,
any Owner  Participant,  SSB,  the  Lessee  or any  Affiliate  thereof  shall be
disregarded  and  deemed  not to be  Outstanding  for the  purpose  of any  such
determination;  provided  that  for  the  purpose  of  determining  whether  the
Indenture  Trustee shall be protected in relying on any such direction,  consent
or waiver,  only if a Responsible  Officer of the  Indenture  Trustee has actual
knowledge  that  certain  Certificates  are so owned by any person  directly  or
indirectly  controlling  or  controlled  by or under  direct or indirect  common
control with the Owner Trustee, such Owner Participant,  SSB or the Lessee shall
such  Certificates  be  so  disregarded;   and  provided  further  that  if  all
Certificates  which would be deemed  Outstanding in the absence of the foregoing
provision are owned by the Owner Trustee, SSB or any Owner Participant or by any
Affiliate  thereof,  then such Certificates  shall be deemed Outstanding for the
purpose of any such determination. Certificates so owned which have been pledged
in good faith may be regarded as Outstanding  if the pledgee  establishes to the
satisfaction of the Indenture Trustee the pledgee's right so to act with respect
to such  Certificates  and that the pledgee is not the Owner Trustee,  the Owner
Participant,  SSB or the Lessee or any Person directly or indirectly controlling
or  controlled  by or under  direct or indirect  common  control  with the Owner
Trustee,  the Owner  Participant,  SSB or the Lessee. In case of a dispute as to
such right,  the advice of counsel  shall be full  protection  in respect of any
decision made by the Indenture  Trustee in accordance  with such advice,  unless
the Lessee, the Owner Trustee,  SSB, or the Owner Participant are actually named
in the Register.  Upon request of the Indenture Trustee,  the Owner Trustee, the
Owner  Participant,  SSB and the Lessee shall furnish to the  Indenture  Trustee
promptly an Officer's  Certificate listing and identifying all Certificates,  if
any, known by the Owner Trustee, the Owner Participant,  SSB or the Lessee to be
owned or held by or for the account of any of the above-described  persons; and,
subject  to  Sections  9.02 and 9.03  hereof,  the  Indenture  Trustee  shall be
entitled to accept such  Officer's  Certificate  as  conclusive  evidence of the
facts set forth therein and of the fact that all Certificates not listed therein
are outstanding for the purpose of any such determination.

         Section 10.05.  Right of Revocation of Action Taken.  At any time prior
to (but not after) the  evidencing  to the  Indenture  Trustee,  as  provided in
Section  10.01,  of the taking of any action by the Holders of the percentage in
aggregate  principal amount of the  Certificates  specified in this Indenture in
connection with such action,  any Holder of a Certificate,  the serial number of
which is shown by the  evidence to be included  among the serial  numbers of the
Certificates the Holders of which have consented to such action,  may, by filing
written  notice at the Corporate  Trust  Department and upon proof of holding as
provided  in  this  Article,   revoke  such  action  so  far  as  concerns  such
Certificate.  Except as aforesaid,  any such action taken by the Holder shall be
conclusive  and binding upon such Holder and upon all future  Holders and owners
of such Certificate and of any  Certificates  issued in exchange or substitution
therefor,  irrespective of whether or not any notation in regard thereto is made
upon any such  Certificate or otherwise.  Any action taken by the Holders of the
percentage in aggregate  principal amount of the Certificates  specified in this
Indenture in connection with such action shall be conclusively  binding upon the
Owner Trustee, the Indenture Trustee and the Holders of all the Certificates.

         Section 10.06. ERISA. Any Person,  other than the Subordination  Agent,
any  Pass-Through   Trustee,   and  any  pass-through   trustee  in  respect  of
pass-through  certificates,  if any,  issued in accordance with Section 15.01 of
the Participation Agreement, who is acquiring the Certificates will be deemed to
represent and warrant that (i) no assets of an employee  benefit plan subject to
Title I of ERISA or an individual  retirement account or plan subject to Section
4975 of the Code, or any trust established under any such plan or account,  have
been used to acquire or hold any of the  Certificates,  or (ii) that one or more
administrative  or statutory  exemptions from the prohibited  transaction  rules
under  Section 406 of ERISA and Section 4975 of the Code applies to its purchase
and  holding  of the  Certificates  such that its  purchase  and  holding of the
Certificates  will not  result  in a  non-exempt  prohibited  transaction  under
Section 406 of ERISA and Section 4975 of the Code.


                                   ARTICLE XI

                          INDEMNIFICATION OF INDENTURE
                            TRUSTEE BY OWNER TRUSTEE

         The Owner Trustee, not individually but solely in its capacity as Owner
Trustee  under the Trust  Agreement,  hereby  agrees,  whether or not any of the
transactions contemplated hereby shall be consummated,  to assume liability for,
and  does  hereby  indemnify,  protect,  save and keep  harmless  the  Indenture
Trustee, in its individual  capacity,  and its successors,  assigns,  agents and
servants  solely from the  Lessor's  Estate,  with  respect to the claims of the
Indenture  Trustee for payment or  reimbursement  under  Section 9.11 hereof and
from  and  against  any  and  all  liabilities,  obligations,  losses,  damages,
penalties,  taxes  (excluding  any taxes payable by the Indenture  Trustee on or
measured by any compensation  received by the Indenture Trustee for its services
under  this  Indenture  and any  taxes  excluded  from  the  Lessee's  indemnity
obligation  under  Section  8.01(b)  of the  Participation  Agreement),  claims,
actions,  suits,  costs,  expenses or  disbursements  (including  legal fees and
expenses) of any kind and nature whatsoever which may be imposed on, incurred by
or asserted  against  the  Indenture  Trustee  (whether or not also agreed to be
indemnified  against by any other  person  under any other  document) in any way
relating to or arising out of this Indenture,  or any other Indenture  Documents
or the enforcement of any of the terms of any thereof, or in any way relating to
or  arising  out  of  the  manufacture,  purchase,  acceptance,   nonacceptance,
rejection,  ownership,  delivery, lease, possession, use, operation,  condition,
sale,  return or other  disposition  of the  Aircraft or any Engine  (including,
without limitation,  latent and other defects, whether or not discoverable,  and
any  claim for  patent,  trademark  or  copyright  infringement),  or in any way
relating to or arising out of the  administration  of the Trust Indenture Estate
or the action or inaction of the Indenture Trustee hereunder, except only (a) in
the case of willful  misconduct or gross negligence of the Indenture  Trustee in
the performance of its duties  hereunder,  (b) as may result from the inaccuracy
of any  representation or warranty of the Indenture Trustee in the Participation
Agreement,  (c) as  otherwise  provided  in  Section  9.02(c)  hereof  or (d) as
otherwise  excluded by the terms of Article 8 or Article 9 of the  Participation
Agreement  from the Lessee's  general  indemnity or general tax indemnity to the
Indenture  Trustee under said Article;  provided that so long as the Lease is in
effect, the Indenture Trustee shall not make any claim under this Article XI for
any claim or expense indemnified by the Lessee under the Participation Agreement
without  first making demand on the Lessee for payment of such claim or expense.
The  Indenture  Trustee  shall be  entitled to  indemnification,  from the Trust
Indenture Estate, for any liability,  obligation,  loss, damage, penalty, claim,
action, suit, cost, expense or disbursement indemnified against pursuant to this
Article XI to the extent not  reimbursed  by the Lessee or others,  but  without
releasing any of them from their respective agreements of reimbursement;  and to
secure  the same the  Indenture  Trustee  shall  have a prior  Lien on the Trust
Indenture Estate. The indemnities contained in this Article XI shall survive the
termination  of this  Indenture and the  resignation or removal of the Indenture
Trustee.  Upon payment in full by the Owner Trustee of any indemnity pursuant to
this  Article XI, the Owner  Trustee  shall,  so long as no  Indenture  Event of
Default  shall have occurred and be  continuing,  be subrogated to the rights of
the  Indenture  Trustee,  if any,  in  respect  of the  matter  as to which  the
indemnity was paid.


                                   ARTICLE XII

                               SUCCESSOR TRUSTEES

         Section 12.01.  Notice of Successor  Owner Trustee.  In the case of any
appointment of a successor to the Owner Trustee  pursuant to the Trust Agreement
or any merger,  conversion,  consolidation or sale of  substantially  all of the
corporate trust business of the Owner Trustee  pursuant to the Trust  Agreement,
the  successor  Owner Trustee shall give prompt  written  notice  thereof to the
Indenture Trustee.

         Section   12.02.   Resignation   and  Removal  of  Indenture   Trustee:
Appointment of Successor. (a) The Indenture Trustee or any successor thereto may
resign  at any time  without  cause by giving  at least 30 days'  prior  written
notice to the Owner Trustee, the Owner Participant,  the Lessee and each Holder,
such  resignation to be effective  upon the  acceptance of the  trusteeship by a
successor  Indenture  Trustee.  In  addition,  the  Majority  in Interest of the
Certificate Holders or the Owner Trustee, with the consent of the Lessee and the
Majority  in  Interest  of the  Certificate  Holders  may at any time remove the
Indenture  Trustee  without cause by an  instrument in writing  delivered to the
Lessee, the Owner Trustee, the Owner Participant, and the Indenture Trustee, and
the Indenture  Trustee shall promptly  notify each Holder thereof of such action
in writing,  such removal to be effective upon the acceptance of the trusteeship
by a successor  Indenture Trustee.  In the case of the resignation or removal of
the Indenture Trustee,  the Majority in Interest of the Certificate  Holders, or
the Owner  Trustee,  with the consent of the Lessee and the Majority in Interest
of the  Certificate  Holders,  may appoint a successor  Indenture  Trustee by an
instrument  signed by such Holders.  If a successor  Indenture Trustee shall not
have been appointed  within 30 days after such notice of resignation or removal,
the Indenture Trustee, the Owner Trustee, the Lessee, the Owner Participant,  or
any  Holder  may  apply to any  court of  competent  jurisdiction  to  appoint a
successor Indenture Trustee to act until such time, if any, as a successor shall
have been  appointed  as provided  above.  The  successor  Indenture  Trustee so
appointed by such court shall  immediately and without further act be superseded
by any successor Indenture Trustee appointed as provided above.

         (b)      In case at any time any of the following shall occur:

                  (i) the  Indenture  Trustee  shall  cease  to be  eligible  in
         accordance  with the  provisions of Section 12.03 hereof and shall fail
         to resign after written request therefor by the Owner Trustee or by any
         Holder; or

                  (ii) the Indenture  Trustee shall become  incapable of acting,
         or  shall be  adjudged  a  bankrupt  or  insolvent,  or a  receiver  or
         liquidator  of the  Indenture  Trustee  or of  its  property  shall  be
         appointed,  or any public  officer  shall take charge or control of the
         Indenture  Trustee or of its  property  or affairs  for the  purpose of
         rehabilitation, conservation or liquidation;

then the Owner Trustee may remove the Indenture Trustee and, with the consent of
the Lessee,  appoint a successor  trustee by written  instrument,  in duplicate,
executed  by a  Responsible  Officer  of the  Owner  Trustee,  one copy of which
instrument  shall be delivered to the Indenture  Trustee so removed and one copy
to the successor trustee,  or, subject to the provisions of Section 7.13 hereof,
any Holder  who has been a bona fide  Holder  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  Indenture  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 Indenture  Trustee and
appoint  a  successor  trustee,  which  removal  and  appointment  shall  become
effective upon acceptance of appointment by the successor trustee as provided in
Section 12.04 hereof. The successor Indenture Trustee so appointed by such court
shall  immediately  and  without  further  act be  superseded  by any  successor
Indenture  Trustee  appointed as provided above within one year from the date of
appointment by such court.

         Section 12.03.  Persons Eligible for Appointment as Indenture  Trustee.
There shall at all times be an Indenture Trustee hereunder which shall be (i)(x)
a bank or trust  company  organized  and  doing  business  under the laws of the
United  States of  America or any state or the  District  of  Columbia  having a
combined  capital  and surplus of at least  $100,000,000  or (y) a bank or trust
company whose obligations hereunder are fully guaranteed by a direct or indirect
parent  thereof having a combined  capital and surplus of at least  $100,000,000
and (ii) a Citizen of the  United  States  authorized  under  applicable  law to
exercise  corporate  trust powers and subject to  supervision  of examination by
Federal, state or District of Columbia authority.  If such corporation publishes
reports of condition at least annually,  pursuant to law or to the  requirements
of the aforesaid  supervising or examining  authority,  then for the purposes of
this  Section,  the combined  capital and surplus of such  corporation  shall be
deemed to be its  combined  capital  and surplus as set forth in its most recent
report of  condition so  published.  In case at any time the  Indenture  Trustee
shall cease to be eligible in  accordance  with the  provisions of this Section,
the Indenture Trustee shall resign immediately in the manner and with the effect
specified in Section 12.02 hereof.

         Section  12.04.  Acceptance of Appointment  by Successor  Trustee.  Any
successor  trustee  appointed as provided in Section  12.02 hereof shall execute
and deliver to the Owner Trustee,  the Lessee, and to its predecessor trustee an
instrument  accepting  such  appointment   hereunder,   in  form  and  substance
reasonably  satisfactory to the Owner Trustee,  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 rights,  powers, duties and obligations of its predecessor  hereunder,  with
like effect as if originally named as trustee herein; but, nevertheless,  on the
written request of the Owner Trustee or of the successor  trustee,  upon payment
of its charges then unpaid, the trustee ceasing to act shall, subject to Section
14.04 hereof,  pay over to the successor  trustee all moneys at the time held by
it hereunder and shall execute and deliver an  instrument  transferring  to such
successor trustee all such rights, powers, duties and obligations.  Upon request
of any such  successor  trustee,  the Owner  Trustee  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 prior  claim upon all  property or funds held or
collected  by such  trustee to secure any  amounts  then due it  pursuant to the
provisions of Article XI hereof.

         No  successor  trustee  shall  accept  appointment  as provided in this
Section 12.04 unless at the time of such acceptance such successor trustee shall
be eligible under the provisions of Section 12.03 hereof.

         Upon  acceptance of appointment  by a successor  trustee as provided in
this  Section  12.04,  the  successor  trustee  shall  mail  notice  thereof  by
first-class  mail to the Holders at their last addresses as they shall appear in
the  Register,  and shall mail a copy of such notice to the Lessee and the Owner
Trustee. If the acceptance of appointment is substantially  contemporaneous with
the  resignation,  then the notice called for by the  preceding  sentence may be
combined with the notice called for by Section 12.02 hereof.

         Section  12.05.  Merger,  Consolidation  or  Succession  to Business of
Indenture  Trustee.  Any  corporation  into which the  Indenture  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 Indenture
Trustee shall be a party, or any  corporation  succeeding to the corporate trust
business of the  Indenture  Trustee,  shall be the  successor  to the  Indenture
Trustee   hereunder,   provided   that,   anything   herein   to  the   contrary
notwithstanding,  such  corporation  shall be eligible  under the  provisions of
Section  12.03  hereof,  without  the  execution  or  filing of any paper or any
further act on the part of any of the parties hereto.

         In case at the time  such  successor  to the  Indenture  Trustee  shall
succeed to the trusts  created by this Indenture any of the  Certificates  shall
have been  authenticated but not delivered,  any such successor to the Indenture
Trustee may adopt the certificate of authentication of any predecessor Indenture
Trustee and deliver such  Certificates  so  authenticated;  and, in case at that
time any of the Certificates shall not have been authenticated, any successor to
the Indenture Trustee may authenticate  such Certificates  either in the name of
any predecessor hereunder or in the name of the successor Indenture Trustee; and
in all such  cases  such  certificate  shall  have the  full  force  which it is
anywhere in the Certificates or in this Indenture  provided that the certificate
of the  Indenture  Trustee  shall  have;  provided,  that the right to adopt the
certificate  of  authentication  of  any  predecessor  Indenture  Trustee  or to
authenticate Certificates in the name of any predecessor Indenture Trustee shall
apply  only  to  its   successor  or   successors   by  merger,   conversion  or
consolidation.

         Section  12.06.  Appointment of Separate  Trustees.  (a) At any time or
times, for the purpose of meeting any legal  requirements of any jurisdiction in
which any part of the Trust  Indenture  Estate  may at the time be located or in
which any action of the  Indenture  Trustee may be required to be  performed  or
taken,  the Indenture  Trustee,  by an  instrument in writing  signed by it, may
appoint one or more  individuals or corporations to act as a separate trustee or
separate trustees or co-trustee,  acting jointly with the Indenture Trustee,  of
all or any part of the Trust Indenture Estate, to the full extent that local law
makes it necessary for such separate trustee or separate  trustees or co-trustee
acting jointly with the Indenture Trustee to act.

         (b) The Indenture Trustee and, at the request of the Indenture Trustee,
the Owner Trustee,  shall execute,  acknowledge and deliver all such instruments
as may be required by the legal  requirements of any jurisdiction or by any such
separate  trustee or  separate  trustees or  co-trustee  for the purpose of more
fully  confirming  such  title,  rights or duties to such  separate  trustee  or
separate  trustees  or  co-trustee.  Upon  the  acceptance  in  writing  of such
appointment by any such separate trustee or separate trustees or co-trustee, it,
he or they shall be vested with such title to the Trust Indenture  Estate or any
part thereof, and with such rights, powers, duties and obligations,  as shall be
specified in the instrument of appointment,  and such rights, powers, duties and
obligations shall be conferred or imposed upon and exercised or performed by the
Indenture  Trustee,  or the  Indenture  Trustee  and such  separate  trustee  or
separate  trustees or co-trustee  jointly with the Indenture  Trustee subject to
all the terms of this Indenture,  except to the extent that under any law of any
jurisdiction  in  which  any  particular  act or acts  are to be  performed  the
Indenture  Trustee shall be  incompetent  or  unqualified to perform such act or
acts,  in which  event such  rights,  powers,  duties and  obligations  shall be
exercised  and  performed  by such  separate  trustee or  separate  trustees  or
co-trustee,  as the case may be. Any  separate  trustee or separate  trustees or
co-trustee  may,  at any  time  by an  instrument  in  writing,  constitute  the
Indenture  Trustee  its or his  attorney-in-fact  and agent  with full power and
authority to do all acts and things and to exercise all discretion on its or his
behalf and in its or his name. In case any such  separate  trustee or co-trustee
shall die, become  incapable of acting,  resign or be removed,  the title to the
Trust Indenture  Estate and all assets,  property,  rights,  powers,  duties and
obligations and duties of such separate  trustee or co-trustee  shall, so far as
permitted by law, vest in and be exercised by the Indenture Trustee, without the
appointment  of a successor to such separate  trustee or  co-trustee  unless and
until a successor is appointed.

         (c) All provisions of this  Indenture  which are for the benefit of the
Indenture Trustee  (including without limitation Article XI hereof) shall extend
to and apply to each separate  trustee or co-trustee  appointed  pursuant to the
foregoing provisions of this Section 12.06.

         (d) Every additional  trustee and separate trustee  hereunder shall, to
the extent  permitted by law, be  appointed  and act and the  Indenture  Trustee
shall act, subject to the following provisions and conditions:

                  (i) all powers, duties,  obligations and rights conferred upon
         the Indenture  Trustee in respect of the receipt,  custody,  investment
         and  payment  of moneys  shall be  exercised  solely  by the  Indenture
         Trustee;

                  (ii)  all  other  rights,   powers,   duties  and  obligations
         conferred or imposed upon the  Indenture  Trustee shall be conferred or
         imposed and  exercised or performed by the  Indenture  Trustee and such
         additional trustee or trustees and separate trustee or trustees jointly
         except to the extent  that under any law of any  jurisdiction  in which
         any particular act or acts are to be performed,  the Indenture  Trustee
         shall be  incompetent  or  unqualified  to perform such act or acts, in
         which event such rights,  powers, duties and obligations (including the
         holding   of  title  to  the  Trust   Indenture   Estate  in  any  such
         jurisdiction)  shall be  exercised  and  performed  by such  additional
         trustee or trustees or separate trustee or trustees;

                  (iii) no power  hereby given to, or  exercisable  by, any such
         additional trustee or separate trustee shall be exercised  hereunder by
         such  additional  trustee or separate  trustee  except jointly with, or
         with the consent of, the Indenture Trustee; and

                  (iv) no trustee hereunder shall be liable either personally or
         in its  capacity as such  trustee,  by reason of any act or omission of
         any other trustee hereunder.

If at any time the  Indenture  Trustee  shall  deem it no  longer  necessary  or
prudent in order to conform to any such law, the Indenture Trustee shall execute
and  deliver an  indenture  supplemental  hereto and all other  instruments  and
agreements  necessary  or proper to remove any  additional  trustee or  separate
trustee.

         (e) Any  request,  approval  or consent  in  writing  by the  Indenture
Trustee  to any  additional  trustee or  separate  trustee  shall be  sufficient
warrant to such additional  trustee or separate trustee,  as the case may be, to
take such action as may be so requested, approved or consented to.

         (f)  Notwithstanding  any other  provision of this Section  12.06,  the
powers of any additional  trustee or separate  trustee shall not exceed those of
the Indenture Trustee hereunder.


                                  ARTICLE XIII

                       SUPPLEMENTS AND AMENDMENTS TO THIS
                       TRUST INDENTURE AND OTHER DOCUMENTS

         Section 13.01.  Supplemental Indentures Without Consent of Holders. The
Owner  Trustee  (when  authorized  by the Owner  Participant)  and the Indenture
Trustee,  without  consent  of the  Holders,  may  enter  into an  indenture  or
indentures supplemental hereto for one or more of the following purposes:

         (a)      to convey,  transfer,  assign, mortgage or pledge any property or assets to the Indenture Trustee
as security for the Certificates;

         (b) to evidence  the  succession  of another  corporation  to the Owner
Trustee  or  successive  successions,   and  the  assumption  by  the  successor
corporation  of the covenants,  agreements and  obligations of the Owner Trustee
herein and in the Certificates;

         (c)  to add  to  the  covenants  of  the  Owner  Trustee  such  further
covenants,  restrictions,  conditions  or  provisions  as it and  the  Indenture
Trustee shall consider to be for the protection of the Holders,  and to make the
occurrence,  or the  occurrence  and  continuance,  of a  default  in  any  such
additional covenants, restrictions,  conditions or provisions an Indenture Event
of Default  permitting  the  enforcement  of all or any of the several  remedies
provided  herein;  provided,  that in respect of any such  additional  covenant,
restriction,  condition or provision 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 an Indenture Event of Default or may limit the
remedies  available to the  Indenture  Trustee  upon such an Indenture  Event of
Default  or may limit the right of not less than the  Majority  in  Interest  of
Certificate Holders to waive such an Indenture Event of Default;

         (d) to  surrender  any right or power  conferred  herein upon the Owner
Trustee or the Owner Participant;

         (e) to cure any  ambiguity or to correct or  supplement  any  provision
contained  herein or in any  supplemental  indenture  which 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 or under any  supplemental  indenture as the Owner
Trustee may deem necessary or desirable and which shall not adversely affect the
interests of the Holders;

         (f) to correct or amplify the  description  of any property at any time
subject to the Lien of this  Indenture  or better to assure,  convey and confirm
unto the Indenture Trustee any property subject or required to be subject to the
Lien of this  Indenture or to subject any  Replacement  Airframe or  Replacement
Engine to the Lien of this Indenture in accordance with the provisions hereof or
with the Lease or to release from the Lien of this  Indenture  property that has
been substituted on or removed from the Aircraft as contemplated in Section 3.07
hereof; provided that supplements to this Indenture entered into for the purpose
of subjecting any Replacement Airframe or Replacement Engine to the Lien of this
Indenture need only be executed by the Owner Trustee and the Indenture Trustee;

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

         (h)      to effect the  re-registration  of the Aircraft  pursuant to Section 6.03(b) of the Participation
Agreement;

         (i) to add, eliminate or change any provision hereunder so long as such
action shall not adversely affect the interests of the Holders; and

         (j) to  effect  the  amendments  contemplated  by  Section  2.03 of the
Participation  Agreement and/or Section 2.18 hereof,  subject to the limitations
set forth therein.

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

         Any such supplemental  indenture may be executed without the consent of
the Holders of Outstanding  Certificates,  notwithstanding any of the provisions
of Section 13.02 hereof.

         Section 13.02.  Supplemental  Indentures With Consent of Holders.  With
the consent  (evidenced as provided in Article X) of the Majority in Interest of
Certificate   Holders,   the  Owner  Trustee  (when   authorized  by  the  Owner
Participant)  and the Indenture  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 of any supplemental indenture or of modifying in
any manner the rights of the  Holders;  provided,  however,  that,  without  the
consent of each and every Holder and each Liquidity Provider,  no such amendment
of or supplement  to this  Indenture or any indenture  supplemental  hereto,  or
modification  of the terms of, or consent under,  any thereof,  shall (a) modify
any of the provisions of Section 7.11 hereof or this Section  13.02,  (b) reduce
the amount or extend the time of  payment of any amount  owing or payable  under
any Certificate or reduce the interest  payable on any Certificate  (except that
only the consent of the Holder shall be required for any decrease in any amounts
of or the rate of interest  payable on such Certificate or any extension for the
time of payment  of any amount  payable  under  such  Certificate),  or alter or
modify  the  provisions  of  Article  V  hereof  with  respect  to the  order of
priorities in which  distributions  thereunder shall be made as among Holders of
different  Series of Certificates or as between the Holder and the Owner Trustee
or the Owner Participant or with respect to the amount or time of payment of any
such distribution, or alter or modify the circumstances under which a Make-Whole
Premium  shall be payable,  or alter the  currency  in which any amount  payable
under  any  Certificate  is to be paid,  or impair  the  right of any  Holder to
commence legal proceedings to enforce a right to receive payment hereunder,  (c)
reduce, modify or amend any indemnities in favor of any Holder or in favor of or
to be paid by the Owner  Participant  (except  as  consented  to by each  Person
adversely affected thereby), or (d) create or permit the creation of any Lien on
the Trust  Indenture  Estate or any part thereof prior to or pari passu with the
Lien of this Indenture,  except as expressly  permitted  herein,  or deprive any
Holder of the  benefit  of the Lien of this  Indenture  on the  Trust  Indenture
Estate,  except as provided in Section  7.02  hereof or in  connection  with the
exercise of remedies  under  Article VII.  This Section 13.02 shall not apply to
any indenture or indentures supplemental hereto permitted by, and complying with
the terms of, Section 13.06 hereof.

         Upon the request of the Owner  Trustee (at the  direction  of the Owner
Participant)  and upon the filing with the Indenture  Trustee of evidence of the
consent of Holders and other documents,  if any,  required by Section 10.01, the
Indenture  Trustee  shall  join with the  Owner  Trustee  and the  Lessee in the
execution of such  supplemental  indenture  unless such  supplemental  indenture
affects the  Indenture  Trustee's own rights,  duties or  immunities  under this
Indenture  or  otherwise,  in  which  case  the  Indenture  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  Holders  under this
Section to approve the particular form of any proposed  supplemental  indenture,
but it shall be sufficient if such consent shall approve the substance thereof.

         Promptly  after the  execution  by the  Owner  Trustee,  the  Indenture
Trustee and the Lessee of any supplemental  indenture pursuant to the provisions
of  this  Section,  the  Indenture  Trustee  shall  mail  a  notice  thereof  by
first-class  mail to the Holders at their  addresses as they shall appear on the
registry books of the Registrar, setting forth in general terms the substance of
such supplemental  indenture.  Any failure of the Indenture Trustee to mail such
notice, or any defect therein,  shall not, however,  in any way impair or affect
the validity of any such supplemental indenture.

         Section 13.03. Effect of Supplemental Indenture.  Upon the execution of
any supplemental  indenture  pursuant to the provisions  hereof,  this Indenture
shall be and be deemed to be modified and amended in  accordance  therewith  and
the respective rights, limitations of rights, obligations, duties and immunities
under this Indenture of the Indenture Trustee, the Owner Trustee, the Lessee and
the Holders 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  13.04.  Documents  to  Be  Given  to  Indenture  Trustee.  The
Indenture  Trustee,  subject to the  provisions of Sections  9.02 and 9.03,  may
receive an  Officer's  Certificate  and an  Opinion  of  Counsel  as  conclusive
evidence  that any such  supplemental  indenture  complies  with the  applicable
provisions of this Indenture.

         Section  13.05.  Notation on  Certificates  in Respect of  Supplemental
Indentures.  Certificates authenticated and delivered after the execution of any
supplemental  indenture  pursuant to the  provisions  of this Article may bear a
notation in form approved by the Indenture Trustee as to any matter provided for
by such  supplemental  indenture.  If the Owner Trustee or the Indenture Trustee
shall so determine,  new Certificates so modified as to conform,  in the opinion
of the Owner  Trustee and the Indenture  Trustee,  to any  modification  of this
Indenture  contained in any such  supplemental  indenture may be prepared by the
Owner Trustee,  authenticated by the Indenture Trustee and delivered in exchange
for the Outstanding Certificates.

         Section 13.06. No Request  Necessary for Lease  Supplement or Indenture
Supplement.  Notwithstanding  anything  contained in Section  13.02  hereof,  no
written  request or consent of the  Indenture  Trustee,  any Holder or the Owner
Participant  pursuant to Section  13.02  hereof  shall be required to enable the
Owner  Trustee  to enter  into any  supplement  to the Lease  with the Lessee in
accordance  with the terms and  conditions of the Lease to subject a Replacement
Airframe or Replacement  Engine thereto or to execute and deliver any supplement
to the  Indenture  (including  the Indenture  Supplement)  pursuant to the terms
hereof.

         Section 13.07. Notices to Liquidity Providers.  Any request made to any
Holder for consent to any  amendment,  supplement or waiver  pursuant to Section
7.11,  8.01 or this  Article XIII shall be promptly  furnished by the  Indenture
Trustee to each Liquidity Provider.


                                   ARTICLE XIV

                    SATISFACTION AND DISCHARGE OF INDENTURE;
                                UNCLAIMED MONEYS

         Section 14.01. Satisfaction and Discharge of Indenture:  Termination of
Indenture.  If at any time after (a) the Owner Trustee shall have paid or caused
to be paid the  principal  of and interest on all the  Certificates  outstanding
hereunder,  as and when the same shall have become due and  payable,  or (b) the
Owner Trustee shall have delivered to the Indenture Trustee for cancellation all
Certificates theretofore  authenticated (other than any Certificates which shall
have been  destroyed,  lost or stolen and which shall have been replaced or paid
as  provided  in  Section  2.07  hereof)  or (c) (i) all such  Certificates  not
theretofore  delivered  to the  Indenture  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 prepayment  within one year under  arrangements
satisfactory to the Indenture  Trustee for the giving of notice of prepayment by
the Indenture  Trustee in the name and at the expense of the Owner Trustee,  and
(ii) the  Owner  Trustee  shall  have  irrevocably  deposited  or  caused  to be
deposited  with the  Indenture  Trustee as trust funds the entire amount in cash
(other than moneys  repaid by the  Indenture  Trustee or any paying agent to the
Owner Trustee in accordance with Section 14.04 hereof) or Government obligations
maturing as to principal  and interest in such amounts and at such times as will
insure  the  availability  of  cash  sufficient  to pay  at  maturity  all  such
Certificates   not   theretofore   delivered  to  the   Indenture   Trustee  for
cancellation, including principal and interest due or to become due to such date
of  maturity  as the case may be,  and if, in any such case,  the Owner  Trustee
shall also pay or cause to be paid all other sums then payable  hereunder by the
Owner Trustee,  then this Indenture  shall cease to be of further effect (except
in the case of (c)  above as to (A)  rights  of  registration  of  transfer  and
exchange,  and the Owner  Trustee's  right of  optional  prepayment  pursuant to
Section 6.02(a)(ii) hereof, (B) substitution of mutilated,  defaced,  destroyed,
lost or stolen  Certificates,  (C)  rights of Holders  to  receive  payments  of
principal  thereof and  interest  thereon,  upon the  original  stated due dates
therefor (but not upon acceleration),  (D) the rights, obligations,  indemnities
and  immunities of the Indenture  Trustee  hereunder,  and (E) the rights of the
Holders as  beneficiaries  hereof with respect to the property so deposited with
the Indenture Trustee payable to all or any of them), and the Indenture Trustee,
on demand of the Owner Trustee  accompanied by an Officer's  Certificate  and an
Opinion of Counsel (covering such matters  reasonably  requested by, and in form
and substance reasonably satisfactory to, the Indenture Trustee) and at the cost
and expense of the Owner Trustee, shall execute proper instruments acknowledging
such satisfaction of and discharging this Indenture. The Owner Trustee agrees to
reimburse  and  indemnify  the  Indenture  Trustee  for any  costs  or  expenses
thereafter  reasonably  and properly  incurred and to  compensate  the Indenture
Trustee for any services  thereafter  reasonably  and  properly  rendered by the
Indenture Trustee in connection with this Indenture or the Certificates.

         Upon (or at any time after)  payment in full to the Indenture  Trustee,
as trust funds, of the principal of and interest on and Make-Whole  Premium,  if
any,  and all other  amounts  due  hereunder  and under  all  Certificates,  and
provided that there shall then be no other amounts due to the Indenture  Trustee
hereunder or under the Participation  Agreement or otherwise secured hereby, the
Owner Trustee shall direct the Indenture Trustee to execute and deliver to or as
directed in writing by the Owner Trustee an appropriate instrument releasing the
Aircraft from the Lien of this  Indenture and releasing the Indenture  Documents
from the assignment thereof  hereunder,  and the Indenture Trustee shall execute
and deliver such  instrument as aforesaid and, at the Owner  Trustee's  expense,
will  execute  and  deliver  such  other  instruments  or  documents  as  may be
reasonably  requested  by the Owner  Trustee  to give  effect  to such  release;
provided,  however,  that this  Indenture  and the trusts  created  hereby shall
terminate earlier and this Indenture shall be of no further force or effect upon
any sale or other final  disposition  by the  Indenture  Trustee of all property
forming a part of the Trust Indenture  Estate and the final  distribution by the
Indenture Trustee of all moneys or other property or proceeds  constituting part
of the Trust  Indenture  Estate in accordance  with the terms hereof.  Except as
aforesaid otherwise provided, this Indenture and the trusts created hereby shall
continue in full force and effect in accordance with the terms hereof.

         Section 14.02.  Application by Indenture Trustee of Funds Deposited for
Payment of Certificates.  Subject to Section 14.04 hereof,  all moneys deposited
with the  Indenture  Trustee  pursuant to Section  14.01 hereof shall be held in
trust and applied by it to the prompt  payment,  either  directly or through any
Paying Agent, to the Holders of the particular  Certificates  for the payment or
prepayment of which such moneys have been deposited with the Indenture  Trustee,
of all sums due and to become due thereon for principal, interest and Make-Whole
Premium,  if any, but such money need not be segregated  from other funds except
to the extent required by law.

         Section  14.03.  Repayment  of Moneys  Held by Paying  Agent.  Upon the
satisfaction  and discharge of this Indenture all moneys then held by any Paying
Agent under the  provisions of this  Indenture  shall,  upon demand of the Owner
Trustee,  be repaid to it or paid to the Indenture  Trustee and  thereupon  such
Paying Agent shall be released from all further  liability  with respect to such
moneys.

         Section 14.04.  Transfer of Unclaimed  Money Held by Indenture  Trustee
and Paying Agent.. Any moneys deposited with or paid to the Indenture Trustee or
any Paying Agent for the payment of the  principal of or interest or  Make-Whole
Premium on any Certificate and not applied but remaining unclaimed for two years
and  eleven  months  after the date  upon  which  such  principal,  interest  or
Make-Whole  Premium shall have become due and payable,  shall,  unless otherwise
required by mandatory provisions of applicable escheat or abandoned or unclaimed
property law, be paid to the Owner Trustee (or, if the Trust  Agreement shall no
longer be in effect, to the Owner  Participant) by the Indenture Trustee or such
Paying  Agent  and  the  Holder  of such  Certificate,  as a  general  unsecured
creditor, shall, unless otherwise required by mandatory provisions of applicable
escheat or abandoned or unclaimed  property  laws,  thereafter  look only to the
Owner Trustee (or the Owner  Participant)  for any payment which such Holder may
be entitled to collect,  and all  liability  of the  Indenture  Trustee,  or any
Paying Agent with respect to such moneys shall thereupon cease.


                                   ARTICLE XV

                                  MISCELLANEOUS

         Section 15.01.  Capacity in Which Acting. Each of SSB (or its permitted
successors or assigns) and FNBM acts  hereunder not in its  individual  capacity
but  solely as  trustee  except as  expressly  provided  herein and in the other
Operative  Documents,  and, in the case of SSB (or its  permitted  successors or
assigns), in the Trust Agreement.

         Section 15.02. No Legal Title to Trust Indenture Estate in Holders.  No
Holder  shall have legal  title to any part of the Trust  Indenture  Estate.  No
transfer,  by operation of law or otherwise,  of any Certificate or other right,
title  and  interest  of any  Holder  in and to the  Trust  Indenture  Estate or
hereunder  shall operate to terminate  this  Indenture or entitle such Holder or
any  successor or  transferee of such Holder to an accounting or to the transfer
to it of legal title to any part of the Trust Indenture Estate.

         Section 15.03.  Sale of Trust Indenture Estate by Indenture  Trustee is
Binding.  Any sale or other conveyance of all or any part of the Trust Indenture
Estate by the Indenture  Trustee made pursuant to the terms of this Indenture or
of the Lease shall bind the Lessee, the Owner Trustee, the Holders and the Owner
Participant  and shall be effective  to transfer or convey all right,  title and
interest of the Indenture Trustee,  the Owner Trustee, the Owner Participant and
such  Holders  therein and  thereto.  No  purchaser  or other  grantee  shall be
required to inquire as to the authorization, necessity, expediency or regularity
of  such  sale or  conveyance  or as to the  application  of any  sale or  other
proceeds with respect thereto by the Indenture Trustee.

         Section 15.04. Indenture Benefits Trustees,  Participants,  Lessee, and
Liquidity Providers Only. Nothing in this Indenture, whether express or implied,
shall be construed to give to any person other than SSB, the Owner Trustee,  the
Lessee,  FNBM,  the Indenture  Trustee,  the Owner  Participant,  each Liquidity
Provider and the Holders any legal or equitable right,  remedy or claim under or
in respect of this  Indenture.  Upon  termination of this Indenture  pursuant to
Article XIV hereof, the Indenture Trustee in connection with the satisfaction of
the  Indenture  shall  return to the Owner  Trustee all  property  (and  related
documents  and  instruments)  constituting  or  evidencing  the Trust  Indenture
Estate.

         Section 15.05.  No Action  Contrary to Lessee's Rights Under the Lease.
Notwithstanding  any of the provisions of this Indenture or the Trust  Agreement
to the  contrary,  so long as no Event of  Default  shall have  occurred  and be
continuing,  neither the  Indenture  Trustee nor the Owner Trustee will take any
affirmative  acts that  interfere  with the  peaceful and quiet  possession  and
enjoyment of the Aircraft by the Lessee or any Permitted Sublessee.

         Section  15.06.  Notices.   Unless  otherwise  expressly  specified  or
permitted by the terms hereof, all notices, requests,  demands,  authorizations,
directions,  consents,  waivers  or  documents  provided  or  permitted  by this
Indenture to be made, given,  furnished or filed shall be in writing,  and shall
be given and become  effective  in the manner set forth in Section  14.01 of the
Participation  Agreement.  Any party  hereto  may  change  the  address to which
notices to such party will be sent by giving  notice of such change to the other
parties to this Indenture.

         Section 15.07.  Officer's  Certificates and Opinions of Counsel..  Upon
any  application  or demand by the Lessee or the Owner  Trustee to the Indenture
Trustee to take any action under any of the  provisions of this  Indenture,  the
Lessee or the Owner Trustee,  as the case may be, shall furnish to the Indenture
Trustee upon request (a) an Officer's  Certificate  stating that all  conditions
precedent  provided for in this Indenture  relating to the proposed  action have
been  complied  with and that the  proposed  action  is in  conformity  with the
requirements  of this  Indenture,  and (b) an Opinion of Counsel stating that in
the opinion of such counsel all such  conditions  precedent,  if any,  have been
complied with,  except that in the case of any such  application or demand as to
which the furnishing of such documents is specifically required by any provision
of this  Indenture  relating  to  such  particular  application  or  demand,  no
additional certificate or opinion need be furnished.

         Any  certificate,  statement  or  opinion  of an  officer of SSB may be
based, insofar as it relates to legal matters,  upon a certificate or opinion of
or representations by counsel, unless such officer knows that the certificate or
opinion  or  representations   with  respect  to  the  matters  upon  which  his
certificate, statement or opinion may be based as aforesaid are erroneous, or in
the exercise of  reasonable  care should know that the same are  erroneous.  Any
certificate, statement or opinion of counsel may be based, insofar as it relates
to factual matters information with respect to which is in the possession of the
Lessee or SSB, upon the certificate,  statement or opinion of or representations
by an officer or officers of the Lessee or SSB, as the case may be,  unless such
counsel knows that the certificate, statement or opinion or representations with
respect to the matters upon which his  certificate,  statement or opinion may be
based as aforesaid are erroneous,  or in the exercise of reasonable  care should
know that the same are erroneous.

         Any  certificate,  statement  or opinion of an officer of the Lessee or
SSB or of counsel  thereto  may be based,  insofar  as it relates to  accounting
matters, upon a certificate or opinion of or representations by an accountant or
firm of accountants employed by the Lessee or the Owner Trustee, as the case may
be,  unless  such  officer  or  counsel,  as the  case  may be,  knows  that the
certificate or opinion or representations with respect to the accounting matters
upon which his  certificate,  statement or opinion may be based as aforesaid are
erroneous,  or in the exercise of reasonable  care should know that the same are
erroneous.

         Any  certificate  or  opinion  of  any   independent   firm  of  public
accountants filed with the Indenture Trustee shall contain a statement that such
firm is independent.

         Section 15.08.  Severability.  Any provision of this Indenture which is
prohibited or unenforceable in any jurisdiction  shall, as to such jurisdiction,
be ineffective to the extent of such  prohibition  or  unenforceability  without
invalidating  the  remaining  provisions  hereof,  and any such  prohibition  or
unenforceability   in  any   jurisdiction   shall  not   invalidate   or  render
unenforceable such provision in any other jurisdiction.

         Section 15.09. No Oral Modifications or Continuing Waivers. No terms or
provisions  of  this  Indenture  or the  Certificates  may be  changed,  waived,
discharged or terminated  orally, but only by an instrument in writing signed by
the party or other  person  against  whom  enforcement  of the  change,  waiver,
discharge or termination is sought; and any waiver of the terms hereof or of any
Certificate  shall  be  effective  only  in the  specific  instance  and for the
specific purpose given.

         Section  15.10.  Successors  and Assigns.  All covenants and agreements
contained herein shall be binding upon, and inure to the benefit of, each of the
parties hereto and the  successors and permitted  assigns of each, all as herein
provided. Any request, notice, direction, consent, waiver or other instrument or
action by any Holder shall bind the successors and assigns of such Holder.  This
Indenture and the Trust Indenture  Estate shall not be affected by any amendment
or  supplement  to the Trust  Agreement or by any other action taken under or in
respect of the Trust Agreement,  except that each reference in this Indenture to
the Trust Agreement  shall mean the Trust Agreement as amended and  supplemented
from time to time to the extent permitted hereby and thereby.

         Section 15.11.    Headings.  The headings of the various  Articles and Sections herein and in the table of
contents  hereto  are for the  convenience  of  reference  only and shall  not  define or limit any of the terms or
provisions hereof.

         Section 15.12. Normal Commercial Relations.  Anything contained in this
Indenture to the contrary notwithstanding,  the Owner Participant, the Indenture
Trustee and any Holder,  or any bank or other  affiliate of any such party,  may
conduct any banking or other financial  transactions,  and have banking or other
commercial  relationships,  with the Lessee  fully to the same extent as if this
Indenture were not in effect,  including without  limitation the making of loans
or other extensions of credit to the Lessee for any purpose whatsoever,  whether
related to any of the transactions contemplated hereby or otherwise.

         Section  15.13.  Governing Law;  Counterparts.  THIS INDENTURE AND EACH
CERTIFICATE  SHALL IN ALL RESPECTS BE GOVERNED BY, AND  CONSTRUED IN  ACCORDANCE
WITH, THE LAW OF THE STATE OF NEW YORK,  INCLUDING ALL MATTERS OF  CONSTRUCTION,
VALIDITY AND  PERFORMANCE.  This Indenture may be executed by the parties hereto
in separate counterparts,  each of which when so executed and delivered shall be
an original, but all such counterparts shall together constitute but one and the
same instrument.



<PAGE>


         IN WITNESS WHEREOF, the parties hereto have caused this Trust Indenture
and Security Agreement to be duly executed this ___th day of September,  1997 by
their  respective  officers  thereunto duly authorized and acknowledge that this
Indenture has been made and delivered in the State of New York.


                                                     STATE STREET BANK AND TRUST
                                                     COMPANY   OF   CONNECTICUT,
                                                     NATIONAL  ASSOCIATION,  not
                                                     in its individual capacity,
                                                     except as specifically  set
                                                     forth  herein but solely as
                                                     Owner Trustee


                                                     By
                                      Name:
                                     Title:



                                                     THE  FIRST   NATIONAL  BANK  OF  MARYLAND,   not  in  its
                                                     individual capacity, but solely as Indenture Trustee


                                                     By
                                                              Name:
                                                              Title:



<PAGE>



9



                                                                                                          Exhibit A
                                                                                                                 to
                                                                                                Trust Indenture and
                                                                                                 Security Agreement


                           Indenture Supplement No. 1


         This  Indenture  Supplement  No. 1 (Atlantic  Coast  Airlines Trust No.
___________) dated ____________, 199_, of State Street Bank and Trust Company of
Connecticut,  National Association,  a national banking association,  not in its
individual  capacity  but  solely as owner  trustee  (herein  called  the "Owner
Trustee")  under the Trust  Agreement dated as of September __, 1997 (the "Trust
Agreement")   between  State  Street  Bank  and  Trust  Company  and  the  Owner
Participant named therein,


                                   WITNESSETH:


         WHEREAS, the Trust Agreement provides for the execution and delivery of
this  Indenture  Supplement  which  shall  particularly  describe  the  Aircraft
included in the property covered by the Trust Agreement.

         WHEREAS,  the Trust  Indenture and Security  Agreement  (Atlantic Coast
Airlines Trust No.  __________) dated as of September 26, 1997 (the "Indenture")
between the Owner Trustee and The First National Bank of Maryland (herein called
the "Indenture Trustee") provides for the execution and delivery of an Indenture
Supplement  substantially in the form of this Indenture  Supplement No. 1, which
Supplement  shall  particularly  describe  the  Aircraft  included  in the Trust
Indenture Estate, and shall specifically mortgage such Aircraft to the Indenture
Trustee.

         WHEREAS,  the  Indenture  relates  to  the  Aircraft  and  the  Engines
described in the  following  paragraph  and a  counterpart  of the  Indenture is
attached  to and  made a part of this  Indenture  Supplement  No.  1,  and  this
Indenture  Supplement No. 1, together with such  attachment,  is being filed for
recordation  on or  promptly  after the date of this  Supplement  No. 1 with the
Federal Aviation Administration as one document.

         NOW, THEREFORE, this Supplement witnesseth,  that, to secure the prompt
payment of the principal of and Make-Whole Premium, if any, and interest on, and
all other amounts due with respect to, all  Outstanding  Certificates  under the
Indenture and all other amounts due hereunder and the performance and observance
by the Owner Trustee of all the  agreements,  covenants and  provisions  for the
benefit  of the  Holders  contained  in the  Indenture,  in  the  Lease,  in the
Participation Agreement and the Certificates,  and the prompt payment of any and
all amounts  from time to time owing under the  Participation  Agreement  by the
Owner  Trustee,  the Owner  Participant or the Lessee to the Holders and for the
uses and purposes and subject to the terms and  provisions  of the Indenture and
the  Certificates,  and in  consideration  of the premises and of the  covenants
contained  in the  Indenture,  and of the  purchase of the  Certificates  by the
Holders, and of the sum of $1 paid to the Owner Trustee by the Indenture Trustee
at or before  the  delivery  of the  Indenture,  the  receipt of which is hereby
acknowledged,   the  Owner  Trustee  has  granted,  bargained,  sold,  assigned,
transferred,  conveyed,  mortgaged, pledged, granted a security interest in, and
confirmed,  and does hereby grant,  bargain,  sell,  assign,  transfer,  convey,
mortgage,  pledge, grant a security interest in, and confirm, unto the Indenture
Trustee, its successors and assigns, in trust for the equal and ratable security
and benefit of the Holders,  in the trust created by the Indenture,  and subject
to all of the terms,  conditions,  provisions and  limitations  set forth in the
Indenture,  a first  priority  security  interest  in and  mortgage  lien on all
estate,  right,  title and  interest  of the Owner  Trustee in, to and under the
following described property:


                                    AIRFRAME

One Airframe identified as follows:

                                                     FAA                        Manufacturer's
                                                     Registration               Serial
Manufacturer               Model                     Number                     Number

Canadair          CL600-2B19                N___                       ____________



together with all appliances, equipment, instruments and accessories (including,
without limitation,  radio and radar) from time to time belonging thereto, owned
by the Owner Trustee and installed in or appurtenant to said aircraft.

                                AIRCRAFT ENGINES

Two  aircraft  engines,  each  such  engine  having  750 or more  rated  takeoff
horsepower or the equivalent thereof, identified as follows:

                                                                                Manufacturer's
                                                                                Serial
Manufacturer                                Model                               Number

General Electric                    CF34-3B1


together with all equipment and  accessories  belonging  thereto,  by whomsoever
manufactured, owned by the Owner Trustee and installed in or appurtenant to such
aircraft engines.

         Together  with all  substitutions,  replacements  and  renewals  of the
property  described  above,  and all property  owned by the Owner  Trustee which
shall hereafter  become  physically  attached to or incorporated in the property
described  above,  whether the same are now owned by the Owner  Trustee or shall
hereafter be acquired by it.

         As further  security for the obligations  referred to above and secured
by the Indenture and hereby,  the Owner  Trustee has granted,  bargained,  sold,
assigned,  transferred,  conveyed,  mortgaged,  pledged and confirmed,  and does
hereby grant, bargain,  sell, assign,  transfer,  convey,  mortgage,  pledge and
confirm,  unto the  Indenture  Trustee,  its  successors  and  assigns,  for the
security and benefit of the Holders, in the trust created by the Indenture,  and
subject to all of the terms, conditions, provisions and limitations set forth in
the Indenture, all of the estate, right, title and interest of the Owner Trustee
in, to and under the Lease  Supplement  (other than Excepted  Payments,  if any)
covering the property described above.

         TO HAVE AND TO HOLD all and singular the  aforesaid  property  unto the
Indenture Trustee,  its successors and assigns,  for the benefit and security of
the Holders for the uses and  purposes  and subject to the terms and  provisions
set forth in the Indenture.

         This Supplement shall be construed as supplemental to the Indenture and
shall form a part thereof, and the Indenture is hereby incorporated by reference
herein and is hereby ratified, approved and confirmed.

         This Supplement is being delivered in the State of New York.

         AND, FURTHER,  the Owner Trustee hereby  acknowledges that the Aircraft
(including  Engines)  referred to in this  Supplement  and the  aforesaid  Lease
Supplement  has been  delivered  to the Owner  Trustee  and is  included  in the
property of the Owner Trustee and covered by all the terms and conditions of the
Trust Agreement, subject to the Lien of the Indenture.



<PAGE>



         IN  WITNESS  WHEREOF,  the Owner  Trustee  has  caused  this  Indenture
Supplement  No. 1 to be duly  executed as of the date first written above by one
of its officers thereunto duly authorized.


                                                     STATE STREET BANK AND TRUST
                                                     COMPANY   OF   CONNECTICUT,
                                                     NATIONAL  ASSOCIATION,  not
                                                     in its individual capacity,
                                                     except as specifically  set
                                                     forth herein, but solely as
                                                     Owner Trustee


                                                     By
                                                              Name:
                                                              Title:



<PAGE>



                                                                                                          Exhibit B
                                                                                                                 to
                                                                                                Trust Indenture and
                                                                                                 Security Agreement


                              [Form of Certificate]


                 THIS CERTIFICATE HAS NOT BEEN REGISTERED UNDER
                 THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY
          NOT BE SOLD OR OFFERED FOR SALE IN CONTRAVENTION OF SAID ACT


No. _________                                                                             $____________

                           EQUIPMENT TRUST CERTIFICATE
                 (Atlantic Coast Airlines Trust No. __________)

                       STATE STREET BANK AND TRUST COMPANY
                      OF CONNECTICUT, NATIONAL ASSOCIATION
                  not in its individual capacity but solely as
                       OWNER TRUSTEE UNDER TRUST AGREEMENT
                 (Atlantic Coast Airlines Trust No. __________)
                         dated as of September __, 1997

                                  SERIES _____

Interest Rate                                                                                    Maturity

     ___%                                                                               ____________, 2___


         State  Street  Bank  and  Trust   Company  of   Connecticut,   National
Association, a national banking association,  not in its individual capacity but
solely as Owner  Trustee  (herein in such capacity  called the "Owner  Trustee")
under that certain Trust Agreement (Atlantic Coast Airlines Trust No. _________)
dated as of September __, 1997,  between the Owner Participant named therein and
State Street Bank and Trust Company of Connecticut, National Association (herein
as such Trust Agreement may be amended or supplemented  from time to time called
the "Trust  Agreement"),  hereby  promises to pay to The First  National Bank of
Maryland,  as Subordination  Agent, or its registered assigns, the principal sum
of  ______________________  ________________ Dollars, payable as set forth below
for the Maturity  specified above, 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 on the principal  outstanding from
time to time,  semiannually  on each January 1 and July 1, on such principal sum
in like coin or  currency at the rate per annum set forth above from the January
1 or the July 1, as the case may be, next preceding the date of this Certificate
to which interest on the Certificates has been paid or duly provided for, unless
the date hereof is a date to which interest on the Certificates has been paid or
duly  provided   for,  in  which  case  from  the  date  of  this   Certificate.
Notwithstanding the foregoing, if the date hereof is after any January 1 or July
1 and  before  the  following  January  1 or July 1, as the  case  may be,  this
Certificate shall bear interest from such January 1 or July 1; provided that, if
the Owner Trustee shall default in the payment of interest due on such January 1
or July 1, then this  Certificate  shall bear interest  from the next  preceding
January 1 or July 1 to which interest on this  Certificate has been paid or duly
provided for. The interest so payable on any January 1 or July 1 will, except as
otherwise  provided in the Indenture referred to below, be paid to the person in
whose  name this  Certificate  is  registered  at the close of  business  on the
December 15 or June 15  preceding  such January 1 or July 1, whether or not such
day is a Business Day.

         This  Certificate  shall  bear  interest  at the  Past  Due Rate on any
principal  hereof  and on any  other  amount  payable  hereunder  or  under  the
Indenture which shall not be paid in full when due (whether at stated  maturity,
by acceleration,  by mandatory prepayment or otherwise), for the period from and
including  the date thereof to but  excluding the date the same is paid in full,
payable from time to time on demand of the Indenture Trustee.

         Principal and interest and other amounts due hereunder shall be payable
at the office or agency of The First  National Bank of Maryland (the  "Indenture
Trustee")  maintained for such purpose in immediately  available  funds prior to
10:30 A.M.  (New York time) on the due date  thereof and the  Indenture  Trustee
shall remit all such  amounts  received by it to the Holders at such  account or
accounts at such financial institution or institutions as the Holders shall have
designated to the Indenture Trustee in writing, in immediately  available funds,
such payment to be made if the payment was received prior to 10:30 A.M. New York
time by the  Indenture  Trustee on any Business Day, by 12:00 noon New York time
on such  Business  Day;  otherwise,  the  Indenture  Trustee  shall make payment
promptly,  but not later than 11:00  A.M.  New York time on the next  succeeding
Business  Day;  provided  that,  at the option of the  Indenture  Trustee or its
Paying  Agent,  interest may be paid by mailing a check  therefor  payable to or
upon the written order of the  registered  holder  entitled  thereto at his last
address  as it  appears  on the  Register.  If any  amount  payable  under  this
Certificate,  or under the Indenture,  falls due on a day that is not a Business
Day, then such sum shall be payable on the next succeeding Business Day, without
(provided that payment is made on such next succeeding  Business Day) additional
interest thereon for the period of such extension.

         State  Street  Bank  and  Trust   Company  of   Connecticut,   National
Association, and The First National Bank of Maryland are not acting individually
hereunder, but solely as Owner Trustee and Indenture Trustee, respectively.

         Any  Person,  other  than the  Subordination  Agent,  any  Pass-Through
Trustee and any pass-through trustee in respect of pass-through certificates, if
any, issued in accordance with Section 15.01 of the Participation Agreement, who
is acquiring the  Certificates  will be deemed to represent and warrant that (i)
no  assets  of an  employee  benefit  plan  subject  to  Title I of  ERISA or an
individual  retirement  account or plan subject to Section 4975 of the Code,  or
any trust established under any such plan or account,  have been used to acquire
or hold any of the  Certificates,  or (ii)  that one or more  administrative  or
statutory exemptions from the prohibited  transaction rules under Section 406 of
ERISA and Section  4975 of the Code  applies to its  purchase and holding of the
Certificates  such that its  purchase and holding of the  Certificates  will not
result in a non-exempt  prohibited  transaction  under  Section 406 of ERISA and
Section 4975 of the Code.

         This  Certificate  is one of a duly  authorized  issue of  Certificates
issued  and to be issued  under  the  Trust  Indenture  and  Security  Agreement
(Atlantic  Coast  Airlines Trust No.  _________)  dated as of September 26, 1997
(herein  as  amended,  supplemented  or  modified  from time to time  called the
"Indenture") between the Owner Trustee and the Indenture Trustee,  designated as
Equipment  Trust  Certificates  (Atlantic  Coast  Airlines  Trust No.  ________)
limited in aggregate initial principal amount to $_______________  consisting of
the following  aggregate  principal  amounts of  Certificates  with the interest
rates per annum and Maturities shown:


                                     Initial
                                    Aggregate
                                    Principal
         Series            Maturity         Amount                     Interest Rate

            A
            B
            C
            D

         Reference is made to the Indenture and all  supplements  and amendments
thereto (a copy of which is on file with the Indenture  Trustee at its principal
corporate  trust  office)  for a  more  complete  statement  of  the  terms  and
provisions thereof,  including a statement of the properties  conveyed,  pledged
and assigned  thereby,  the nature and extent of the  security,  the  respective
rights of the Owner Trustee,  the Owner  Participant,  the Lessee, the Indenture
Trustee and the Holders,  and the terms upon which the Certificates are, and are
to be,  executed  and  delivered,  to all of which terms and  conditions  in the
Indenture each Holder hereof agrees by its acceptance of this Certificate.

         Capitalized  terms not otherwise defined herein shall have the meanings
given to them in the Indenture.

         The principal  amounts of the  Certificates are payable as set forth in
Schedule I attached  hereto,  which schedule is subject to amendment as provided
in Section 2.18 of the Indenture.  The Certificates are subject to redemption in
part,  pro rata  (based  on the  face  amount  thereof),  in each  case  through
mandatory  sinking fund redemptions  providing for the redemption on the Sinking
Fund  Redemption  Dates of the  aggregate  principal  amounts  set forth  below,
together with interest accrued thereon to the applicable Sinking Fund Redemption
Date, but without Make-Whole Premium.

         Except  as  expressly  provided  in  the  Indenture,  all  payments  of
principal, Make-Whole Premium, if any, and interest and other amounts to be made
to the Holder hereof by or at the behest of the Owner Trustee hereunder or under
the Indenture  shall be made only from the income and proceeds from the Lessor's
Estate to the  extent  included  in the Trust  Indenture  Estate and only to the
extent that the Owner Trustee shall have sufficient  income or proceeds from the
Lessor's Estate to the extent  included in the Trust Indenture  Estate to enable
the Indenture Trustee to make such distributions in accordance with the terms of
the Indenture;  provided that under the Lease, the Lessee is obligated to pay or
cause to be paid,  to the extent such  payments are not required to be made from
the assets  subject  to the Lien of this  Indenture  or the income and  proceeds
received by the  Indenture  Trustee  therefrom,  any net loss  arising  from the
investment  of funds  held by the  Indenture  Trustee  which but for an Event of
Default would be payable to Lessee, and each Holder hereof, by its acceptance of
this  Certificate,  agrees that it will (except as aforesaid) look solely to the
income and proceeds from the Trust Indenture  Estate to the extent available for
distribution  to the Holder hereof as provided  above and that neither the Owner
Participant,  nor the Owner Trustee,  nor State Street Bank and Trust Company of
Connecticut,  National  Association,  nor the  Indenture  Trustee is  personally
liable to the Holder hereof for any amounts  payable or any liability under this
Certificate  or  under  the  Indenture,  except  as  expressly  provided  in the
Indenture,  in the case of State Street Bank and Trust  Company of  Connecticut,
National Association, the Owner Trustee and the Indenture Trustee.

         The   Certificates   are  subject  to   prepayment   in  the  following
circumstances at the price determined as set forth below.

         (i) If an Event of Loss  occurs  with  respect to the  Airframe or with
respect  to the  Airframe  and the  Engines  or engines  then  installed  on the
Airframe  (unless  pursuant to Section 11(a)(1) of the Lease and Section 9.08 of
the Indenture replacement equipment is substituted therefor).

         (ii) If the Lessee,  pursuant to Section 16 of the Lease,  gives notice
of purchase of the  Aircraft  (and the Lessee shall not have revoked such notice
or effected an assumption of the Certificates as provided in Section 2.12 of the
Indenture).

         (iii) If the Owner  Participant,  or the Owner Trustee on behalf of the
Owner Participant,  gives notice of prepayment to the Indenture Trustee pursuant
to Section 8.02 of the Indenture.

         (iv) If the Lessee, pursuant to Section 3(g) of the Lease, gives notice
of a voluntary  termination for obsolescence or surplus,  but subject to Section
6.02(c) of Indenture.

         (v)  Pursuant  to  Section  15.01  of the  Participation  Agreement  in
connection with a Refinancing of the Certificates.

         (vi) As  contemplated  by Section  2.16 of the  Indenture  and  Section
3.05(b) of the Participation  Agreement if the Delivery Date has not occurred on
or prior to the Cut-Off Date.

         (vii) At the option of the Owner Trustee with the prior written consent
of the  Lessee  and the  Owner  Participant  upon not less  than 25 days'  prior
written notice.

         (viii)  If  a  Triggering  Event  (as  defined  in  the   Intercreditor
Agreement)  occurs prior to the earliest of (A) the Delivery  Date, (B) the date
the obligations of the Owner Trustee under the  Certificates  are assumed by the
Lessee pursuant to Section 3.05(a) of the Participation  Agreement and (iii) the
Cut-Off Date.

         In the case of a  prepayment  of the  Certificates  pursuant to clauses
(ii),  (iv) and (v) above,  the Lessee,  in  accordance  with and subject to the
terms (including timing of notice) of Section 3(g) or Section 16 of the Lease or
Article  15 of the  Participation  Agreement,  as the  case may be,  shall  give
irrevocable  (subject to Section 6.02(c) of the Indenture) written notice to the
Owner  Trustee  and  the  Indenture  Trustee  and to the  Holders  of all of the
Certificates  specifying the Business Day on which the Owner Trustee is directed
to prepay the Certificates.  In the case of a prepayment  pursuant to clause (i)
above, the Certificates shall be prepaid on the Loss Payment Date (as defined in
Section 11(a)(2) of the Lease).  In the case of a prepayment  pursuant to clause
(iii) above,  the  Certificates  shall be prepaid on the date  designated in the
notice of prepayment required by Section 8.02 of the Indenture. In the case of a
prepayment  of the  Certificates  pursuant to clauses  (ii) and (iv) above,  the
Certificates  shall be prepaid in full on the Termination Date. In the case of a
prepayment of the  Certificates  pursuant to clause (v) above,  the Certificates
shall be  prepaid on the  effective  date of the  Refinancing.  In the case of a
prepayment of the  Certificates  pursuant to clause (vi) above, the Certificates
shall be prepaid on the 15th day  following  the Cut-Off  Date. In the case of a
prepayment of the Certificates  pursuant to clause (vii) above, the Certificates
shall be prepaid on the date  designated in the notice  referred to therein.  In
the case of a prepayment of the Certificates  pursuant to Section  6.02(a)(viii)
above, the Certificates  shall be prepaid on the Special  Distribution  Date (as
defined in the Intercreditor Agreement) as provided in Section 2.4(b)(ii) of the
Intercreditor  Agreement. The day on which the Certificates are to be prepaid is
herein referred to as the "Prepayment Date". On or prior to the Prepayment Date,
immediately  available funds shall be deposited with the Indenture Trustee in an
amount in respect of the Certificates equal to:

                  (1) if such  prepayment is made pursuant to clause (i),  (iii)
         (if  clause  (i),  but not  clause  (ii) or  clause  (iii) of the first
         sentence of Section  8.02(a) of the  Indenture is  applicable  and such
         prepayment  is made  when an Event of  Default  has  occurred  and been
         continuing  for 180 days or more or if clause  (ii) or clause  (iii) of
         the first sentence of Section  8.02(a) hereof is  applicable),  (vi) or
         (viii)  above,  the sum of (A) the aggregate  principal  amount of such
         Certificates then Outstanding, (B) accrued interest on the Certificates
         to the  Prepayment  Date  and  (C) all  other  aggregate  sums  due the
         Indenture  Trustee  under  the  Indenture  or under  the  Participation
         Agreement or the Lease,  but excluding any Make-Whole  Premium or other
         premium or penalty, or

                  (2) if such prepayment is made pursuant to clause (ii),  (iii)
         (if  clause  (i),  but not  clause  (ii) or  clause  (iii) of the first
         sentence of Section  8.02(a) of the  Indenture is  applicable  and such
         prepayment  is made  when an Event of  Default  has  occurred  and been
         continuing for less than 180 days),  (iv), (v) or (vii) above,  the sum
         of the amounts  specified in clauses (A), (B) and (C) of the  preceding
         clause  (1) plus any  Make-Whole  Premium  payable  in  respect  of all
         Certificates

(the aggregate amount required to be paid pursuant to this sentence being herein
referred to as the "Prepayment Price").

         If,  in  accordance  with  and  subject  to  the  satisfaction  of  the
conditions set forth in Section 7.11 of the Participation  Agreement, the Lessee
shall assume all of the  obligations of the Owner Trustee  hereunder,  under the
Certificates and all other Operative  Agreements,  the Owner Participant and the
Owner Trustee shall (except for prior acts) be released and discharged  from any
further obligations hereunder and under the Certificates and all other Operative
Agreements (except any obligations that have accrued prior to such assumption).

         If an Indenture Event of Default under the Indenture shall occur and be
continuing, the principal of the Certificates may be declared due and payable in
the manner and with the effect provided in the Indenture. The Indenture provides
that in certain events such  declaration and its  consequences  may be waived by
the  Majority  in  Interest  of  Holders.  Any such  consent or waiver  shall be
conclusive and binding upon the Holder of this  Certificate  and upon all future
Holders and owners of this Certificate and any Certificate that may be issued in
exchange or substitution  therefor,  whether or not any notation thereof is made
upon this Certificate or such other Certificates.  Moreover, if, and only if, an
Event of Default shall occur, the Indenture  Trustee may declare the Lease to be
in default, and may, to the exclusion of the Owner Trustee, exercise one or more
of the remedies of the Owner Trustee provided in the Lease.

         The Owner  Trustee or the Owner  Participant  may cure a default by the
Lessee under the Lease  arising from the failure of the Lessee to make any Basic
Rent payments under the Lease, but the Owner Trustee and the Owner  Participant,
collectively,  may not cure more than three  consecutive  such  failures or more
than six such failures in total. The Owner Trustee or the Owner  Participant may
cure any other default by the Lessee in the performance of its obligations under
the Lease, provided that such default can be cured by the payment of money.

         If (A) an Event of Default shall have occurred and be continuing or (B)
the Indenture Trustee shall have taken action, or notified the Owner Participant
that it  intends to take  action,  to  foreclose  the Lien of the  Indenture  or
otherwise  commence the exercise of any significant remedy under Section 7.02 of
the  Indenture or Section 15 of the Lease,  or (C) the  Certificates  shall have
been  accelerated,  the Owner Participant (or the Owner Trustee on behalf of the
Owner Participant) may:

                  (1) direct the Owner  Trustee to cause the  prepayment  of all
the Outstanding Certificates by notifying the Indenture Trustee of such election
and  depositing  the sum of amounts  contemplated  by  paragraph  "first"  under
Section 5.03 of the  Indenture and the  aggregate  Prepayment  Price of all such
Certificates with the Indenture Trustee for distribution to the Holders; or

                  (2) purchase all of the Outstanding  Certificates by paying to
the Indenture  Trustee an amount equal to the aggregate  unpaid principal amount
of all  Outstanding  Certificates,  plus accrued  interest on such amount to the
date of purchase,  plus all other sums due any Holder or the  Indenture  Trustee
under the Indenture,  the Participation  Agreement or the Lease, but without any
Make-Whole  Premium  (provided that the Make-Whole  Premium shall be included if
such purchase is made pursuant to clause (i) of Section 8.02(a) of the Indenture
(but not  pursuant  to clause  (ii) or clause  (iii) of  Section  8.02(a) of the
Indenture) when the Event of Default shall have occurred and been continuing for
less than 180 days).

         The right of the Holder  hereof to  institute  an action for any remedy
under  the  Indenture  is  subject  to  certain  restrictions  specified  in the
Indenture,  except that the right of the Holder of this  Certificate  to receive
payment of the principal of and interest and Make-Whole Premium, if any, on this
Certificate on or after the  respective due dates,  or to institute suit for the
enforcement of any such payment,  shall not be impaired or affected  without the
consent of such Holder.

         The Certificates are issuable only as registered  Certificates  without
coupons in denominations of $1,000 and integral  multiples  thereof.  So long as
any of the Certificates remain Outstanding,  the Indenture Trustee will maintain
an office or agency where the  Certificates  may be presented  for payment and a
facility or agency in New York, New York where the Certificates may be presented
for  registration of transfer and for exchange as provided in the Indenture.  As
provided in the  Indenture  and  subject to certain  limitations  therein,  this
Certificate  is  transferable,  and  upon  surrender  of  this  Certificate  for
registration  of  transfer  at  the  principal  corporate  trust  office  of the
Indenture Trustee, or at the office or agency maintained for such purposes, duly
endorsed  by,  or  accompanied  by a  written  instrument  of  transfer  in form
satisfactory  to the Owner Trustee and the  Indenture  Trustee duly executed by,
the  Holder  or his  attorney  duly  authorized  in  writing,  one or  more  new
Certificates of the same Series and Maturity and interest rate and of authorized
denominations and for the same aggregate  principal amount will be issued to the
designated transferee or transferees.

         As  provided  in the  Indenture  and  subject  to  certain  limitations
therein,  the Certificates  are  exchangeable  for an equal aggregate  principal
amount of  Certificates of the same Series and Maturity and interest rate and of
authorized denominations, as requested by the Holder surrendering the same, upon
presentation thereof for such purpose at the principal corporate trust office of
the Indenture Trustee, or at an office or agency maintained for such purpose.

         No service charge shall be levied for any such registration of transfer
or exchange,  but the Indenture  Trustee may require payment of a sum sufficient
to cover any tax or other governmental charge payable in connection therewith.

         Prior to the due  presentment  for  registration  of  transfer  of this
Certificate,  the Owner Trustee,  the Indenture Trustee,  any agent of the Owner
Trustee or the Indenture  Trustee,  the Paying Agent,  if any, the Registrar and
the Lessee  shall deem and treat the  person in whose name this  Certificate  is
registered  as the absolute  owner  hereof for all purposes  whether or not this
Certificate  is overdue,  and neither the Owner Trustee,  the Indenture  Trustee
(nor any agent of the Owner  Trustee or the Indenture  Trustee),  nor the Paying
Agent,  if any, the  Registrar nor the Lessee shall be affected by notice to the
contrary.

         The indebtedness evidenced by this Certificate is, to the extent and in
the  manner  provided  in the  Indenture,  subordinate  and  subject in right of
payment to the prior payment in full of the Secured  Obligations  (as defined in
the  Indenture) in respect of [Series A  Certificates]1,  [Series A and Series B
Certificates]2  [Series  A,  Series  B,  and  Series C  Certificates]3  and this
Certificate  is  issued  subject  to  such   provisions.   The  Holder  of  this
Certificate,  by  accepting  the same,  (a) agrees to and shall be bound by such
provisions,  (b) authorizes  and directs the Indenture  Trustee on such Holder's
behalf to take such action as may be necessary or  appropriate to effectuate the
subordination  as provided in the  Indenture,  and (c)  appoints  the  Indenture
Trustee such Holder's attorney-in-fact for such purpose.*

         As provided in the Indenture,  the Indenture and the Certificates shall
be  construed  in  accordance  with and governed by the laws of the State of New
York.

         This Certificate  shall not be secured by or be entitled to any benefit
under  the  Indenture  or  be  valid  or  obligatory   for  any  purpose  unless
authenticated  by the Indenture  Trustee as evidenced by the manual signature of
one of its authorized officers on the certificate below.


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

         1To be inserted in the case of a Series B Certificate.  2To be inserted
         in the case of a Series C Certificate. 3To be inserted in the case of a
         Series D Certificate.

         *To be inserted for each Certificate other than any Series A Certificate.


<PAGE>



         IN WITNESS  WHEREOF,  the Owner Trustee has caused this Equipment Trust
Certificate (Atlantic Coast Airlines Trust No. ____________) to be duly executed
in its corporate name by its officer thereunto duly authorized.


Dated: September  __, 1997                           STATE  STREET  BANK AND  TRUST  COMPANY  OF  CONNECTICUT,
                                                     NATIONAL  ASSOCIATION,  not in its  individual  capacity,
                                                     but solely as Owner Trustee


                                                     By
                                      Name:
                                     Title:


                                                         FORM OF INDENTURE TRUSTEE'S CERTIFICATE OF AUTHENTICATION]


         This is one of the Equipment Trust  Certificates  (Atlantic Coast Airlines Trust No.  _________)  referred
to in the within mentioned Indenture.


Dated:  September __, 1997                           THE FIRST  NATIONAL  BANK OF MARYLAND,  not in its  individual
                                                     capacity, but solely as Indenture Trustee


                                                     By
                                      Name:
                                     Title:


<PAGE>


1
O7853/O59/N670FE/TRUST/trust.agt
Federal Express Corporation Trust No. N67OFE
0156828.07


===================================================================================================================



                                 TRUST AGREEMENT

                (ATLANTIC COAST AIRLINES TRUST NO. ____________)

                          Dated as of September 1, 1997

                                     between

                            ATLANTIC COAST AIRLINES,
                                     Trustor

                                       and

               STATE STREET BANK AND TRUST COMPANY OF CONNECTICUT,
                              NATIONAL ASSOCIATION,
                                  Owner Trustee



                            COVERING ONE CANADAIR REGIONAL JET, SERIES 200 ER AIRCRAFT
                 SERIAL NO._______, REGISTRATION NO. ___________




===================================================================================================================


<PAGE>



16

                                 TRUST AGREEMENT
                  (ATLANTIC COAST AIRLINES TRUST NO.__________)



         TRUST AGREEMENT (ATLANTIC COAST AIRLINES TRUST  NO.____________)  dated
as of September 1, 1997 (this  "Agreement")  between STATE STREET BANK AND TRUST
COMPANY OF CONNECTICUT, NATIONAL ASSOCIATION, a national banking association (in
its individual capacity, "SSB", and not in its individual capacity but solely as
trustee  hereunder,  the  "Owner  Trustee"),  and  ATLANTIC  COAST  AIRLINES,  a
California  corporation (together with its successors and permitted assigns, the
"Trustor").  The capitalized terms used herein,  unless otherwise herein defined
or the  context  hereof  shall  otherwise  require,  shall  have the  respective
meanings set forth in Schedule I attached hereto.


                                               W I T N E S S E T H:

         WHEREAS,  the  Trustor  desires  to create a trust for the  purpose  of
issuing Certificates,  the proceeds of which issuance shall initially be held by
the Indenture  Trustee on behalf of the Owner Trustee in the Collateral  Account
and  released,  subject to the proviso to Section  3.02(b) of the  Participation
Agreement,  on the  Delivery  Date in order to finance a portion of the Purchase
Price of the Aircraft, to acquire the Aircraft from Seller on the Delivery Date,
to lease the  Aircraft  to the Lessee on the  Delivery  Date and to receive  the
benefits provided for herein.

         WHEREAS,  SSB is willing to accept the trust as herein  provided and to
perform its  obligations  hereunder in its  individual  capacity or as the Owner
Trustee as the case may be.

         NOW THEREFORE,  in consideration of the mutual covenants and agreements
contained herein, SSB and the Trustor agree as follows:

                                    ARTICLE 1

                               THE LESSOR'S ESTATE

         Section 1.01. Authorization and Direction to Owner Trustee. The Trustor
hereby  authorizes  and  directs  (or has  authorized  and  directed)  the Owner
Trustee, not individually but solely as the Owner Trustee hereunder:

                  (a) to execute and deliver as and when  specified  in Sections
         4.01  and  4.02  of  the  Participation  Agreement,  the  Participation
         Agreement and each of the other Operative Agreements to which the Owner
         Trustee  is a party  and to enter  into and  perform  the  transactions
         contemplated thereby including, without limitation, accepting title to,
         and  delivery of, the Aircraft  from Seller on the Delivery  Date,  and
         taking all  appropriate  action to cause the Airframe to be  registered
         with the  Federal  Aviation  Administration  in the  name of the  Owner
         Trustee;

                  (b) to execute and deliver from time to time the  Certificates
         in the manner and subject to the terms and  conditions  provided in the
         Participation Agreement and the Indenture;

                  (c) to execute and deliver each other document  referred to in
         the Operative Agreements to which the Owner Trustee is a party or which
         the Owner  Trustee is  required to deliver  pursuant  to the  Operative
         Agreements;

                  (d)  subject to the terms of this  Agreement,  to perform  the
         obligations and duties and, upon  instruction of the Trustor,  exercise
         the rights of the Owner Trustee under the Operative Agreements; and

                  (e)  to  execute  and  deliver  all  such  other  instruments,
         documents or certificates and take all such other actions in accordance
         with the  directions of the Trustor,  as the Trustor may deem necessary
         or advisable in connection  with the  Certificate  Closing Date and the
         Delivery Date and the transactions  contemplated  hereby, the taking of
         any such action by the Owner  Trustee in the presence of the Trustor or
         its counsel to evidence, conclusively, the direction of the Trustor.

         Section 1.02.  Declaration of Trust. SSB hereby declares and agrees, in
its individual capacity,  that it will, and in its capacity as the Owner Trustee
does,  hold the Lessor's  Estate upon the trust herein set forth for the use and
benefit of the Trustor,  subject,  however,  to the  provisions of, and the Lien
created by, the  Indenture.  This  Agreement  is not  intended by the Trustor to
create,  and the trust  created  hereby is not  intended  by the Trustor and the
other parties  interested  herein to constitute a business trust for purposes of
the Bankruptcy Code.

         Section 1.03.  Conditions  Precedent.  The right and  obligation of the
Owner  Trustee to take the  actions  required by Section  1.01  hereof  shall be
subject to the condition  that the terms and conditions of Section 4.01 or 4.02,
as the case may be, of the Participation Agreement shall have been complied with
in a manner satisfactory to the Owner Trustee and the Trustor.

                                    ARTICLE 2

                                  DISTRIBUTIONS

         Section 2.01.  Predelivery Funding;  Rent, Etc. (a) The Trustor and the
Owner Trustee acknowledge that the proceeds from the sale of the Certificates to
be  effected on the  Certificate  Closing  Date are to be held by the  Indenture
Trustee in the Collateral  Account in the manner  specified in the Indenture for
application  as  provided  therein  and in  Section  3.02  of the  Participation
Agreement.

                  (b) The Trustor  and the Owner  Trustee  acknowledge  that the
         Lease will be security for the  Certificates  pursuant to the Indenture
         which  provides  that all  moneys  payable  by the  Lessee to the Owner
         Trustee under the Lease (other than Excepted  Payments) are to be first
         paid to the  Indenture  Trustee  while the Lien of the  Indenture is in
         effect,  for  distribution in accordance with the terms of Article V of
         the Indenture.  Except for amounts received from the Indenture Trustee,
         which shall be applicable  only in accordance  with clause (iii) below,
         the Owner Trustee shall  promptly apply each payment of the Rent (other
         than Excepted Payments),  Stipulated Loss Value, Termination Value, and
         any proceeds from the sale,  requisition or disposition of the Aircraft
         received by it as follows:

                           (i)  prior  to  the   release  of  the  Lien  of  the
                  Indenture,  each such payment shall be payable directly to the
                  Indenture  Trustee (and if any of the same are received by the
                  Owner  Trustee  shall,  upon  receipt,  be  paid  over  to the
                  Indenture Trustee without deduction,  set off or adjustment of
                  any kind) for  distribution  in accordance with the provisions
                  of Article V of the  Indenture;  provided,  that any  payments
                  received by the Owner Trustee from (x) the Lessee with respect
                  to SSB's or the Owner Trustee's fees and  disbursements  under
                  this  Agreement,  or (y) the Trustor  pursuant to Section 5.01
                  hereof  shall not be paid over to the  Indenture  Trustee  but
                  shall be retained by the Owner Trustee and applied  toward the
                  purpose for which such payments were made;

                           (ii) after the release of the Lien of the  Indenture,
                  any amount  remaining after  application in full in accordance
                  with   paragraph   (b)(i)  of  this  Section  2.01  and  which
                  represents  payments for which provision as to the application
                  thereof  is made in any  other  Operative  Agreement  shall be
                  applied  promptly to the purpose for which such payment  shall
                  have been made in accordance  with the terms of such Operative
                  Agreement; and

                  (iii) after  application in accordance with paragraphs (i) and
                  (ii) of this Section  2.01(b),  or to the extent received from
                  the Indenture  Trustee under the terms of the  Indenture,  the
                  balance, if any, remaining shall be paid to the Trustor.

         Section 2.02.  Excepted Payments.  Notwithstanding  any other provision
contained  herein,  all  Excepted  Payments  at any time  received  by the Owner
Trustee shall be distributed promptly to the applicable Person entitled thereto,
and such payment shall not be deemed under any  circumstances  to be part of the
Lessor's Estate.

         Section  2.03.  Distributions  after  Release  of Lien of  Indenture.  Except  as  otherwise  provided  in
Sections 2.01 and 2.02 hereof:

                  (a) all payments  received  and amounts  realized by the Owner
         Trustee  under the Lease or  otherwise  with respect to the Aircraft or
         any part thereof (including,  without limitation, all payments received
         pursuant to Section  15(a) of the Lease and amounts  realized  upon the
         sale or lease of the Aircraft or any part thereof after the termination
         of the Lease with respect thereto),  to the extent received or realized
         at any time after the Lien of the  Indenture  shall have been  released
         pursuant to the terms of the Indenture, and

                  (b) moneys not included in paragraph  (a) of this Section 2.03
         remaining  as  part  of the  Lessor's  Estate  after  the  Lien  of the
         Indenture has been released,

                    shall,  to the extent  required,  be  retained  by the Owner
    Trustee as reimbursement  for all expenses  hereunder or under the Lease not
    theretofore  reimbursed under this Agreement,  the Lease or otherwise and to
    which the  Owner  Trustee  is  entitled  to be  reimbursed  pursuant  to the
    provisions   thereof,   and  any  balance  remaining   thereafter  shall  be
    distributed to the Trustor.

         Section 2.04. Manner of Making  Distributions.  The Owner Trustee shall
make distributions or cause distributions to be made to (i) the Trustor pursuant
to this Article 2 by  transferring  by wire  transfer in  immediately  available
funds the amount to be distributed to the account set forth in the Participation
Agreement  or to  such  other  account  or  accounts  of the  Trustor  as it may
designate  from time to time by  written  notice to the Owner  Trustee  (and the
Owner  Trustee shall use best efforts to cause such funds to be  transferred  by
wire  transfer on the same day as  received,  but in any case not later than the
next succeeding  Business Day), and (ii) the Indenture  Trustee pursuant to this
Article 2 by paying the amount to be distributed to the Indenture Trustee in the
manner specified in the Indenture; provided, that the Owner Trustee shall invest
overnight,  for the  benefit  of the  Trustor,  in  investments  that  would  be
permitted  by  Section  11(e) of the  Lease  (but only to the  extent  funds are
received  on or prior to 2:00  P.M.  (Eastern  Time)  and such  investments  are
available  and, if such  investments  are not  available to the Owner Trustee in
investments  which,  after  consultation  with the  Trustor,  the Trustor  shall
direct) all funds not  transferred by wire transfer on the same day as they were
received. Notwithstanding the foregoing but subject always to the provisions of,
and the Lien created by, the Indenture,  the Owner Trustee will, if so requested
by the Trustor by written notice, pay in immediately available funds any and all
amounts payable by the Owner Trustee hereunder to the Trustor as directed by the
Trustor.

                                    ARTICLE 3

                                THE OWNER TRUSTEE

         Section  3.01.  Acceptance  of Trust and Duties.  SSB accepts the trust
hereby created and, subject to Section 1.03 hereof, in its capacity as the Owner
Trustee agrees to perform the same,  including  without  limitation,  subject to
Section  1.03  hereof,  the actions  specified  in Section 1.01 hereof as herein
provided. The Owner Trustee agrees to disburse all monies that it receives under
the Operative  Agreements in accordance with the terms hereof. The Owner Trustee
shall not be answerable or accountable in its  individual  capacity  except as a
result of or arising from (a) the Owner  Trustee's  willful  misconduct or gross
negligence  (in its  individual  capacity or as trustee),  (b) any breach by the
Owner Trustee of its  representations,  warranties  and  covenants  given in its
individual  capacity in this  Agreement,  Section 6 of the Lease,  and  Sections
7.02(a) and (b) and 7.04 of the Participation  Agreement or its representations,
warranties and covenants  given in its individual  capacity in Sections 3.05 and
3.08 of the  Indenture,  (c) the  failure  to use  ordinary  care in  receiving,
handling and  disbursing  funds,  (d) Lessor's Liens  attributable  to it in its
individual  capacity,  and (e) taxes,  fees,  or other  charges on, based on, or
measured by, any fees,  commissions or compensation received by SSB or the Owner
Trustee in  connection  with the  transactions  contemplated  by the Lease,  the
Indenture and the Operative Agreements including this Agreement.

         Section  3.02.  Limitation  on  Authority of Owner  Trustee.  The Owner
Trustee  shall have no power,  right,  duty or authority  to, and agrees that it
will not, manage,  control,  possess,  use, sell, lease, dispose of or otherwise
deal  with the  Aircraft,  Airframe,  Engines,  any Part  thereof  or any  other
property at any time constituting a part of the Lessor's Estate, or otherwise to
take or refrain from taking any action under or in connection with the Operative
Agreements,  except (i) to execute and deliver the Operative Agreements to which
it is a party,  (ii) to  exercise  and  carry  out or cause to be  exercised  or
carried out the rights,  duties and  obligations of the Owner Trustee  hereunder
and under the other  Operative  Agreements,  or (iii) as  expressly  provided in
written  instructions  from the Trustor  given  pursuant to Section 3.03 or 3.04
hereof;  provided,  that  nothing in this Section 3.02 shall limit in any manner
the obligations of the Owner Trustee hereunder.

         Section  3.03.  Notice  of  Default.  In the event  that a  Responsible
Officer in the Corporate Trust Department of the Owner Trustee shall have actual
knowledge  of a Default or an Event of Default,  or an  Indenture  Default or an
Indenture Event of Default, the Owner Trustee shall give or cause to be given to
the Trustor and the  Indenture  Trustee  prompt  telephone or facsimile  notice,
followed by prompt  confirmation  thereof by certified mail, postage prepaid (in
any event within two Business Days of the discovery thereof), in accordance with
Article 14 of the Participation  Agreement,  of such Default,  Event of Default,
Indenture Default or Indenture Event of Default. Subject to the terms of Section
3.06(e) hereof and the rights of the Indenture Trustee under the Indenture,  the
Owner  Trustee  shall take such action with  respect to such  Default,  Event of
Default,  Indenture  Default or Indenture Event of Default as shall be specified
in written instructions from the Trustor;  provided that the Owner Trustee shall
have no duty to take any (and shall take no) action whatsoever in the absence of
written  instructions  from the Trustor.  For all purposes of this Agreement and
the Lease,  in the absence of actual  knowledge of a Responsible  Officer of the
Owner  Trustee,  the Owner  Trustee  shall not be deemed to have  knowledge of a
Default,  Event of  Default,  Indenture  Default or  Indenture  Event of Default
unless notified in writing by the Lessee, the Trustor,  the Indenture Trustee or
any Certificate Holder.

         Section 3.04. Action Upon Instructions.  Upon the written  instructions
at any time and from time to time of the Trustor, the Owner Trustee will take or
refrain  from  taking such  action,  not  inconsistent  with  provisions  of the
Indenture, as may be specified in such instructions.

         Section 3.05.  Certain  Duties and  Responsibilities  of Owner Trustee.
(a)(i) The Owner Trustee  undertakes to perform such duties and only such duties
as are specifically  set forth herein,  and with the degree of care specified in
Section 3.01 hereof,  and in accordance with written  instructions  given by the
Trustor hereunder, and no implied duties, covenants or obligations shall be read
into this Agreement,  any such instructions or the Operative  Agreements against
the  Owner  Trustee,  and the  Owner  Trustee  agrees  that it will not  manage,
control,  possess,  use,  sell,  lease,  dispose of or  otherwise  deal with the
Aircraft or any part of the Lessor's  Estate  except as required by the terms of
the  Operative  Agreements,  any such  instructions  and as  otherwise  provided
herein; and

                           (ii) in the  absence  of bad faith on its  part,  the
                  Owner  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 Owner
                  Trustee and conforming to the  requirements  of this Agreement
                  or the other Operative Agreements, but in the case of any such
                  certificates  or opinions  which by any  provisions  hereof or
                  thereof are specifically required to be furnished to the Owner
                  Trustee,  the Owner  Trustee  shall be under a duty to examine
                  the  same to  determine  whether  or not they  conform  to the
                  requirements   of  this  Trust   Agreement  or  the  Operative
                  Agreements.

                  (b) No provision  hereof shall  require SSB in its  individual
         capacity  to  expend  or risk its own  funds  or  otherwise  incur  any
         financial  liability in the performance of any of its duties hereunder,
         or in the  exercise  of any of its rights or  powers,  if it shall have
         reasonable  grounds  for  believing  that  repayment  of such  funds or
         adequate  indemnity  against such risk or  liability is not  reasonably
         assured  to  it.  Notwithstanding  the  foregoing,  SSB  agrees  in its
         individual capacity that it will, at its own cost and expense, promptly
         take such action as may be  necessary  to  discharge  duly all Lessor's
         Liens  attributable to it in its individual  capacity and will claim no
         indemnity therefor hereunder,  or under the Participation  Agreement or
         any Operative Agreement.

                  (c)  Whether  or not  therein  expressly  so  provided,  every
         provision of this  Agreement  relating to the conduct or affecting  the
         liability  of or affording  protection  to the Owner  Trustee  shall be
         subject to the  provisions  of this  Section  3.05,  except that in the
         event of a conflict  between this Section 3.05 and Section 3.01 hereof,
         Section 3.01 hereof shall be controlling.

                  (d) The Owner  Trustee will  furnish to the Trustor,  promptly
         upon receipt  thereof,  duplicates  or copies of all reports,  notices,
         requests,  demands,  certificates,  financial  statements and any other
         instruments furnished to the Owner Trustee hereunder or under the other
         Operative  Agreements  (including  those  furnished  to  the  Indenture
         Trustee  pursuant  to the  terms of the  Indenture)  and not  otherwise
         furnished to the Trustor.

                  (e) Notwithstanding anything herein to the contrary, the Owner
         Trustee  shall not be  authorized  and shall have no power to "vary the
         investment" of the Trustor  within the meaning of Treasury  Regulations
         Section  301.7701-4(c)(1),  it being  understood that the Owner Trustee
         shall have the power and  authority  to fulfill its  obligations  under
         Section 2.06 hereof and Section 11(e) of the Lease.

         Section 3.06.  Certain Rights of Owner Trustee. Except as otherwise provided in Section 3.05 hereof:

                  (a) in the absence of bad faith on its part, the Owner Trustee
         may rely and shall be  protected  in acting or  refraining  from acting
         upon  any  resolution,  certificate,  statement,  instrument,  opinion,
         report, notice,  request,  direction,  consent, order or other paper or
         document  reasonably  believed  by it to be  genuine  and to have  been
         signed or presented by the proper party or parties;

                  (b) any request,  direction or authorization by the Trustor or
         any other party to any other Operative  Agreement shall be sufficiently
         evidenced  by  a  request,   direction  or  authorization  in  writing,
         delivered to the Owner Trustee, and signed in the name of such party by
         any of the Chairman of the Board,  the President,  any Vice  President,
         the  Treasurer  or Assistant  Treasurer  or the  Secretary or Assistant
         Secretary  or other  duly  authorized  officer of such  party;  and any
         resolution of the Board of Directors or committee thereof of such party
         shall be sufficiently  evidenced by a copy of such resolution certified
         by the Secretary or an Assistant  Secretary of such party, to have been
         duly  adopted  and to be in full  force and  effect on the date of such
         certification, and delivered to the Owner Trustee;

                  (c) whenever in the administration of this Agreement the Owner
         Trustee shall deem it desirable  that a matter be proved or established
         prior to taking,  suffering or omitting  any action  hereunder or under
         any of the other Operative Agreements,  the Owner Trustee (unless other
         evidence be herein or therein specifically  prescribed),  absent actual
         knowledge  of a  Responsible  Officer  of  the  Owner  Trustee  to  the
         contrary,  may  rely in  good  faith  upon a  certificate  in  writing,
         delivered to the Owner Trustee and signed by any of the Chairman of the
         Board,  the President,  any Vice President,  the Treasurer or Assistant
         Treasurer or the  Secretary or Assistant  Secretary of the Lessee,  the
         Trustor,  or the  Indenture  Trustee  and  notice of such need for such
         proof or  establishment  shall be  delivered  to the  Trustor,  who may
         advise  the Owner  Trustee  in  respect  of such  matter  and the Owner
         Trustee shall act in conformity with such advice;

                  (d) the Owner  Trustee may exercise its powers and perform its
         duties by or through  such  attorneys,  agents and servants as it shall
         appoint with due care, and it shall be entitled to rely upon the advice
         of  counsel  reasonably  selected  by it with  due  care  and  shall be
         protected by the advice of such counsel in anything  done or omitted to
         be done in accordance with such advice;

                  (e) the Owner  Trustee  shall not be under any  obligation  to
         take  any  action  under  this  Agreement  or  under  any of the  other
         Operative  Agreements at the request or direction of the Trustor unless
         the Persons making such request or direction  shall have offered to the
         Owner  Trustee  reasonable  security  or  indemnity  against the costs,
         expenses and  liabilities  which might be incurred by it in  compliance
         with such request or direction; nor shall the Owner Trustee be required
         to take any action deemed to impose on the Owner Trustee any obligation
         to take any action, if the Owner Trustee shall have been advised by its
         counsel  that such  action is  unlawful  or is contrary to the terms of
         this Agreement or the other Operative Agreements;

                  (f)  the  Owner  Trustee  shall  not  be  bound  to  make  any
         investigation  into the  facts or  matters  stated  in any  resolution,
         certificate,  statement,  instrument, opinion, report, notice, request,
         direction,   consent,  order  or  other  paper  or  document  unless  a
         Responsible  Officer of the Owner Trustee has actual knowledge that the
         facts or matters stated therein are false or inaccurate,  but the Owner
         Trustee  in  its   discretion   may  make  such   further   inquiry  or
         investigation into such facts or matters as it may see fit, and, if the
         Owner  Trustee  shall   determine  to  make  such  further  inquiry  or
         investigation,  it shall be entitled,  to the same extent  permitted to
         the Lessor  under the Lease,  to examine  the books and  records of the
         Lessee to reasonably determine whether the Lessee is in compliance with
         the terms and  conditions  of the Lease and to  examine  the  Aircraft,
         Airframe,  Engines  or any  Part  thereof  personally  or by  agent  or
         attorney; and

                  (g) without  limiting the  generality  of Section 3.05 hereof,
         except as otherwise provided in written instructions given to the Owner
         Trustee by the Trustor or as otherwise provided in the Indenture or the
         Participation  Agreement, the Owner Trustee shall not have any duty (i)
         to see to any recording or filing of the Lease or of this  Agreement or
         any financing statement or other notice or document relating thereto or
         contemplated   under  the  Operative   Agreements  or  to  see  to  the
         maintenance  of any such  recording or filing (other than FAA reporting
         requirements  contained in 14 C.F.R. Sections 47.45 and 47.51), (ii) to
         see to any  insurance  on the Aircraft or any part thereof or to effect
         or maintain any such  insurance,  whether or not the Lessee shall be in
         default with respect thereto,  other than to forward to the Trustor and
         (to the extent provided in the Indenture) the Indenture  Trustee copies
         of all  certificates,  reports and other written  information  which it
         receives  from the Lessee  pursuant  to the Lease,  (iii) to see to the
         payment  or  discharge  of any tax,  assessment  or other  governmental
         charges or any Lien (except any Lessor's Lien attributable to it in its
         individual  capacity)  owing with  respect  to, or  assessed  or levied
         against any part of the Lessor's Estate,  (iv) to confirm or verify any
         financial  statements  or reports of the Lessee,  or (v) to inspect the
         Aircraft at any time or ascertain or inquire as to the  performance  or
         observance of any of the Lessee's covenants under the Lease.

         Section 3.07. No  Representations  or Warranties as to Certain Matters.
NEITHER THE OWNER  TRUSTEE NOR SSB MAKES OR SHALL BE DEEMED TO HAVE MADE (a) ANY
REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AS TO THE TITLE,  AIRWORTHINESS,
VALUE,   CONDITION,   WORKMANSHIP,   DESIGN,   COMPLIANCE  WITH  SPECIFICATIONS,
CONSTRUCTION,  OPERATION,  MERCHANTABILITY  OR FITNESS FOR USE FOR A  PARTICULAR
PURPOSE OF THE AIRCRAFT,  AS TO THE ABSENCE OF LATENT OR OTHER DEFECTS,  WHETHER
OR NOT  DISCOVERABLE,  AS TO THE  ABSENCE  OF ANY  INFRINGEMENT  OF ANY  PATENT,
TRADEMARK  OR  COPYRIGHT,  AS TO THE  ABSENCE  OF  OBLIGATIONS  BASED ON  STRICT
LIABILITY IN TORT, OR ANY OTHER REPRESENTATION OR WARRANTY  WHATSOEVER,  EXPRESS
OR IMPLIED,  WITH RESPECT TO THE AIRCRAFT OR ANY PART  THEREOF,  except that SSB
represents  and warrants  that on the Delivery Date the Owner Trustee shall have
received whatever right,  title and interests in, to and under the Aircraft that
were  conveyed to it by the Seller and SSB  represents,  warrants and  covenants
that at all times on and after the Delivery  Date the Aircraft  shall be free of
all Lessor's Liens  attributable  to it, and that the Owner Trustee shall comply
with the last sentence of Section 3.05(b) hereof,  or (b) any  representation or
warranty as to the validity, legality or enforceability of this Agreement or any
other  Operative  Agreement to which the Owner Trustee is a party,  or any other
document or instrument,  or as to the correctness of any statement  contained in
any  thereof,  except to the extent  that any such  representation,  warranty or
statement is expressly made herein or therein as a representation or warranty by
the Owner Trustee or SSB and except that SSB hereby represents and warrants that
this  Agreement has been,  and (assuming  the due  authorization,  execution and
delivery of this  Agreement by the Trustor) the other  Operative  Agreements  to
which the Owner  Trustee is a party have been (or at the time of  execution  and
delivery of any such  instrument by the Owner  Trustee  hereunder or pursuant to
the terms of the  Participation  Agreement that such an instrument will be) duly
executed and delivered by one of its officers who is or will be, as the case may
be, duly  authorized  to execute and deliver such  instruments  on behalf of the
Owner  Trustee and that this  Agreement has been duly  authorized,  executed and
delivered by SSB and (assuming due authorization, execution and delivery of this
Trust  Agreement  by the  Trustor)  constitutes  the  legal,  valid and  binding
obligation of SSB enforceable against it in accordance with its terms, except as
such  enforceability may be limited by bankruptcy,  insolvency,  reorganization,
moratorium or other similar laws affecting the rights of creditors generally and
by general principles of equity.

         Section 3.08.  Status of Moneys  Received.  All moneys  received by the
Owner  Trustee  under or  pursuant to any  provision  of this  Agreement  or any
Operative  Agreement shall constitute trust funds for the purpose for which they
were paid or are held,  but need not be  segregated in any manner from any other
moneys  except to the extent  required by law and may be  deposited by the Owner
Trustee under such conditions as may be prescribed or permitted by law for trust
funds, or may be invested in direct obligations of the United States.

         Section  3.09.  Self-Dealing.  The  Owner  Trustee  in  its  individual
capacity,  or  any  corporation  in or  with  which  the  Owner  Trustee  may be
interested or  affiliated,  or any officer or director of any such  corporation,
may have normal commercial relations, and otherwise deal, in the ordinary course
of business,  with the Lessee or any other corporation having relations with the
Lessee to the full extent permitted by law.

         Section 3.10. Definition of a Responsible Officer. For purposes of this
Trust Agreement only,  "Responsible Officer" when used with respect to the Owner
Trustee means the Chairman or the  Vice-Chairman of the Board of Directors,  the
Chairman or Vice-Chairman of the Executive  Committee of the Board of Directors,
the President,  any Vice  President  (whether or not designated by a number or a
word or words added before or after the title "Vice President"),  the Secretary,
any Assistant Secretary,  or any other officer in the Corporate Trust Department
of SSB customarily performing functions similar to those performed by any of the
above designated officers.

         Section  3.11.  Resignation  or  Removal  of Owner  Trustee.  The Owner
Trustee or any successor  thereof (a) shall resign if required to do so pursuant
to Section 7.02(b) of the Participation Agreement and (b) may resign at any time
without  cause by giving at least 60 days' prior  written  notice to the Trustor
and the Indenture  Trustee,  such  resignation in each case to be effective only
upon  the  appointment  of a  successor  trustee  and  the  acceptance  of  such
appointment by such successor.  In addition,  the Trustor may at any time remove
the Owner Trustee  without  cause by an  instrument in writing  delivered to the
Owner Trustee and the Indenture Trustee,  such removal to be effective only upon
the  appointment by the Trustor of a successor  Owner Trustee and the acceptance
of such appointment by such successor.  Upon the giving of notice of resignation
or removal of the Owner  Trustee,  the Trustor  may  appoint a  successor  Owner
Trustee by an instrument signed by the Trustor. If the Trustor shall not have so
appointed a successor  Owner Trustee  within 30 days after such  resignation  or
removal,  the Owner Trustee,  the Indenture  Trustee or the Trustor may apply to
any court of competent  jurisdiction to appoint a successor Owner Trustee to act
until such time, if any, as a successor or successors  shall have been appointed
by the Trustor as above provided.  Any successor Owner Trustee so appointed by a
court shall be superseded by any successor Owner Trustee subsequently  appointed
by the Trustor.

         The  appointment of any successor Owner Trustee shall be subject to the
conditions set forth in Section 11.01 of the Participation Agreement.

         Section  3.12.  Estate  and  Rights of  Successor  Owner  Trustee.  Any
successor  Owner Trustee,  however  appointed,  shall execute and deliver to the
predecessor Owner Trustee, with a copy to the Trustor and the Indenture Trustee,
an instrument  accepting such appointment,  in form and substance  acceptable to
the predecessor Owner Trustee and the Trustor and thereupon each successor Owner
Trustee,  without  further  act,  shall  become  vested  with  all the  estates,
properties, rights, powers, duties and trust of the predecessor Owner Trustee in
the trust hereunder with like effect as if originally  named as an Owner Trustee
herein,  but  nevertheless  upon the  written  request of such  successor  Owner
Trustee,  such predecessor Owner Trustee shall execute and deliver an instrument
transferring to such successor Owner Trustee,  upon the trust herein  expressed,
all estates, properties, rights, powers, duties, property or moneys then held by
such predecessor  Owner Trustee upon the trust herein  expressed.  Upon any such
transfer by a predecessor  Owner Trustee,  such predecessor  Owner Trustee shall
provide the  successor  Owner  Trustee and Trustor an accounting of the Lessor's
Estate and the trust hereunder.

         Upon the  appointment  of any successor  Owner Trustee  hereunder,  the
predecessor Owner Trustee will use its best efforts to cause registration of the
Aircraft  included in the Lessor's Estate to be transferred  upon the records of
the  Aeronautics  Authority  or other  registry  where the  Aircraft may then be
registered  into the name of the successor Owner Trustee and shall otherwise use
its best efforts to comply,  or assist the successor Owner Trustee in complying,
with the provisions of Section 11.01 of the Participation Agreement.

         Section 3.13.  Merger or  Consolidation  of SSB. Any  corporation  into
which SSB in its  individual  capacity  may be  merged  or with  which it may be
consolidated,  or any corporation  resulting from any merger or consolidation to
which SSB shall be a party,  or any corporation to which  substantially  all the
business of the Owner  Trustee in its  individual  capacity may be  transferred,
shall,  subject to Section 11.01 of the  Participation  Agreement,  be the Owner
Trustee  under  this  Agreement  without  further  act;   provided,   that  such
corporation shall not also be the Indenture Trustee.

         Section  3.14.  Co-Trustees.  At any time,  if the Owner Trustee or the
Trustor  shall deem it  necessary or prudent or desirable in order to conform to
legal  requirements of any jurisdiction in which any part of the Lessor's Estate
may at the time be located, the Owner Trustee by an instrument in writing signed
by it,  shall  appoint  one or more  Persons  approved  by the Trustor to act as
co-trustee, or co-trustees,  jointly with the Owner Trustee, or separate trustee
or separate  trustees (except insofar as local law makes it necessary or prudent
or desirable for any such co-trustee or separate  trustee to act alone),  of all
or any part of the Lessor's  Estate,  and to vest in such Person or Persons,  in
such capacity,  such title to the Lessor's Estate or any part thereof,  and such
rights,  powers,  duties,  trusts or  obligations  as the Trustor  may  consider
necessary or prudent or desirable. The Owner Trustee shall not be liable for any
act or  omission of any  co-trustee  or separate  trustee  appointed  under this
Section  3.14.  No  appointment  of, or action by, any  co-trustee  or  separate
trustee  appointed under this Section 3.14 will relieve the Owner Trustee of any
of its obligations under any Operative  Agreement or otherwise affect any of the
terms of the  Indenture  or  adversely  affect the  interests  of the  Indenture
Trustee or the Certificate Holders in the Trust Indenture Estate.

         Any co-trustee or separate trustee may, at any time by an instrument in
writing, constitute the Owner Trustee its or his attorney-in-fact and agent with
full  power  and  authority  to do all  acts  and  things  and to  exercise  all
discretion on its or his behalf and in its or his name subject to the conditions
of this Agreement.

         Every  additional  trustee  hereunder  shall be a Citizen of the United
States and, to the extent  permitted by law, be appointed and act, and the Owner
Trustee and its successors  shall act,  subject to the following  provisions and
conditions:

                  (A) all powers, duties,  obligations and rights conferred upon
         the Owner Trustee in respect of the custody,  control and management of
         monies, the Aircraft or documents  authorized to be delivered hereunder
         or under the  Participation  Agreement shall be exercised solely by the
         Owner Trustee;

                  (B) all other rights, powers, duties and obligations conferred
         or imposed  upon the Owner  Trustee  shall be conferred or imposed upon
         and  exercised or performed  by the Owner  Trustee and such  additional
         trustee  jointly,  except  to the  extent  that  under  any  law of any
         jurisdiction  in which any  particular  act or acts are to be performed
         (including  the  holding  of title to the  Lessor's  Estate)  the Owner
         Trustee  shall be  incompetent  or  unqualified  to perform such act or
         acts, in which event such rights,  powers, duties and obligations shall
         be exercised and performed by such additional trustee;

                  (c) no power  given to,  or which is  provided  hereby  may be
         exercised by, any such additional trustee, except jointly with, or with
         the consent in writing of, the Owner Trustee;

                  (D) no trustee  hereunder shall be personally liable by reason
         of any  act or  omission  of any  other  trustee  hereunder  except  as
         otherwise provided hereunder; and

                  (E) the Trustor,  at any time, by an instrument in writing may
         remove any such additional trustee.

         Section 3.15. Interpretation of Agreements. In the event that the Owner
Trustee is unsure as to the  application  of any provision of this  Agreement or
any  other  Operative   Agreement  or  any  other  agreement   relating  to  the
transactions  contemplated  by the  Operative  Agreements  or such  provision is
ambiguous as to its  application,  or is, or appears to be, in conflict with any
other  applicable  provision,  or in the event that this  Agreement or any other
Operative  Agreement permits any determination by the Owner Trustee or is silent
or  incomplete as to the course of action which the Owner Trustee is required to
take with respect to a particular set of facts,  the Owner Trustee shall request
in writing sent in  accordance  with Article 14 of the  Participation  Agreement
instructions  of the Trustor  and, to the extent that the Owner  Trustee acts in
good faith in accordance with any instructions received from the Trustor,  shall
not be liable to any  Person;  provided,  that in the event that no  response is
made to the Owner  Trustee by the  Trustor  within 25  Business  Days after such
request,  the Owner  Trustee shall not be liable to any Person for acts taken by
the Owner Trustee in good faith in what it deems to be the best interests of the
Trustor  or for any  failure  to act in any  situation  described  above in this
Section 3.15. The provisions of this Section 3.15 shall not be applicable to the
Owner  Trustee's  obligations  set forth in the last  sentence  of Section  3.01
hereof.

         Section 3.16.  Not Acting in Individual  Capacity.  In carrying out the
trust hereby created, the Owner Trustee will act solely as trustee hereunder and
not in its individual  capacity  except as expressly  provided  herein or in the
other Operative  Agreements to which it is a party; and all Persons,  other than
the Trustor as provided in this  Agreement,  having any claim  against the Owner
Trustee by reason of the transactions contemplated hereby shall look only to the
Lessor's  Estate  for  payment  or  satisfaction  thereof,  except to the extent
provided in the last sentence of Section 3.01 hereof.

         Section 3.17. Books and Records:  Tax Returns.  The Owner Trustee shall
be responsible for the keeping of all appropriate  books and records relating to
its receipt and disbursement of all moneys under this Agreement or any Operative
Agreement  and shall,  upon the  request of the  Trustor or its duly  authorized
representative,  make  available  such books and records at its principal  trust
office  during  normal  business  hours for  inspection  and copying.  The Owner
Trustee  agrees to sign and file all  returns  with  respect  to Taxes  that the
Trustor  prepares  (or causes to be prepared)  and directs the Owner  Trustee to
sign and file.  The Owner Trustee,  upon request,  will furnish the Trustor with
all such  information as may be reasonably  required or necessary from the Owner
Trustee in connection with the preparation of such tax returns and in connection
with any other  filing  or audit  and  related  litigation  obligations.  At the
request of the  Trustor,  and at the  expense of the Lessee,  the Owner  Trustee
shall file an  application  with the  Internal  Revenue  Service  for a taxpayer
identification number with respect to the trust created hereunder and prepare or
cause to be prepared and sign and/or file the Federal  fiduciary tax return with
respect  to  Taxes  due  and  payable  by  the  Trust  in  connection  with  the
transactions contemplated hereby or by any other Operative Agreement;  provided,
however,  that the Owner Trustee shall send a completed copy of each such return
to the  Trustor  not more than 60 nor less than 30 days prior to the due date of
such return;  provided  that the Owner  Trustee  shall have timely  received all
necessary  information  to complete and deliver to the Trustor such return.  The
Trustor,  upon request, will furnish the Owner Trustee with all such information
as may be required from the Trustor in connection  with the  preparation of such
income tax returns.
The Owner Trustee shall keep copies of all returns delivered to or filed by it.

                                    ARTICLE 4

                              TERMINATION OF TRUST

         Section  4.01.  Termination.  This  Agreement  and the trust  created and  provided for hereby shall cease
and be terminated in any one of the following events, whichever shall first occur:

                  (a) The sale or other final  disposition  by the Owner Trustee
         of all of its interest in all property  constituting or included in the
         Lessor's Estate and, if the Indenture shall then be in effect, the sale
         or other disposition by the Indenture Trustee of all of its interest in
         all property  constituting or included in the Lessor's Estate,  and the
         final disposition by the Owner Trustee and, if the Indenture shall then
         be in effect, the Indenture Trustee, of all moneys or other property or
         proceeds  constituting  part of the Lessor's  Estate in accordance with
         the terms hereof; or

                  (b) 21 years less one day from the death of the last  survivor
         of the  descendants  of Queen Victoria of England living on the date of
         this Agreement; provided, however, that if the Trust shall be or become
         valid under applicable law for a period subsequent to 21 years less one
         day from the death of the last  survivor  of the  descendants  of Queen
         Victoria of England  living on the date of this  Agreement or,  without
         limiting the generality of the foregoing,  if legislation  shall become
         effective  providing for the validity or permitting the effective grant
         of such trust for a period,  in gross,  exceeding  the period for which
         such  trust is  hereinabove  stated to extend  and be valid,  then such
         trust  shall  not  terminate  as  provided  in the  first  part of this
         sentence but shall extend to and continue in effect until,  but only if
         such non-termination and extension shall then be valid under applicable
         law, such time as the same shall,  under  applicable  law,  cease to be
         valid.

         Section  4.02.  Termination  at Option of the Trustor.  Notwithstanding
Section 4.01 hereof, this Agreement and the trust created hereby shall terminate
and the Trust Estate shall be  distributed  to the Trustor,  and this  Agreement
shall be of no further  force and  effect,  upon the  election of the Trustor by
notice to the Owner Trustee,  if such notice shall be accompanied by the written
agreement  (in form and  substance  satisfactory  to the Owner  Trustee)  of the
Trustor  assuming all the obligations of the Owner Trustee under or contemplated
by the Operative Agreements or incurred by it as trustee hereunder and releasing
the Owner Trustee therefrom;  provided,  however,  that such notice may be given
only after the time the Lien of the Indenture is discharged  under Section 14.01
of the  Indenture  and the Lease has  terminated  unless the Trustor  shall have
received  the  prior  written  consent  of the  Indenture  Trustee  to any  such
termination  in  which  case  such  notice  may be given  while  the Lien of the
Indenture is outstanding.

         Section 4.03.  Distribution of Lessor's Estate upon  Termination.  Upon
any termination of this trust pursuant to the provisions of Section 4.01 hereof,
the Owner Trustee shall convey the Lessor's Estate (subject to all  obligations,
if any, of the Owner  Trustee then existing  under the  Operative  Agreements to
which the Owner  Trustee  is a party) to such  purchaser  or  purchasers  or the
Trustor,  as the case may be, and for such  amount and on such terms as shall be
specified  in  written  instructions  from the  Trustor  delivered  to the Owner
Trustee prior to the date of termination;  provided,  that (i) if at the time of
any termination the Lease remains in force and effect,  then the Lessor's Estate
shall be sold as a unit (and not in parcels) and subject to the Lease,  and (ii)
in the event such written instructions are not delivered to the Owner Trustee on
or before the date of termination, the Owner Trustee shall transfer title to the
Lessor's Estate to the Trustor. Upon making such transfer or sale and accounting
for all funds  which  have  come into its  hands,  the  Owner  Trustee  shall be
entitled to receipt of any sums due and owing to the Owner  Trustee for expenses
incurred pursuant hereto as set forth in Section 2.05 hereof.

                                                         ARTICLE 5

                                              TRANSFER OF BENEFICIAL INTEREST

         The  Initial  Owner  Participant  may,  on the  Delivery  Date (or,  if
earlier, the Transfer Date), assign, convey or otherwise transfer its Beneficial
Interest  to one or more  Persons to enable the Owner  Trustee to  purchase  the
Aircraft pursuant to Section 3.02 of the Participation Agreement.

                                                         ARTICLE 6

                                                       MISCELLANEOUS

         Section 6.01. Indemnification.  The Trustor shall assume liability for,
and shall  indemnify,  protect,  save and keep harmless SSB from and against any
and all liabilities,  obligations,  losses, damages,  penalties,  taxes, claims,
actions,  proceedings,  suits,  costs (including  reasonable  attorneys'  fees),
expenses and  disbursements of any kind and nature  whatsoever  ("Trust Claims")
imposed on,  incurred by or  asserted  against the Owner  Trustee or SSB, as the
case may be (but only to the  extent the Owner  Trustee or SSB,  as the case may
be, is not  indemnified  by the Lessee for such Trust Claims under any Operative
Document or is not indemnified by any other Person for such Trust Claims, within
a reasonable time after demand therefor),  in any way relating to or arising out
of (X) the Trust Estate or any of the  properties  included  therein and (Y) the
administration  of the Trust  Estate  or the  action  of  inaction  of the Owner
Trustee hereunder or under the Operative  Documents  including,  but not limited
to, claims under any Environmental Laws; provided, however, that (a) the Trustor
shall not be required to indemnify  the Owner  Trustee or SSB in the case of (i)
willful  misconduct,  negligence  with  respect  to  handling  of  funds,  gross
negligence  or bad faith of the Owner  Trustee or SSB,  as the case may be, (ii)
the Owner  Trustee's or SSB's  failure to use  ordinary  care in the handling of
monies  constituting part of the Trust Estate,  (iii) Taxes of the Owner Trustee
or SSB, as the case may be,  that are based on or  measured by the  compensation
received by SSB for acting as Owner Trustee  hereunder,  and (iv) items excluded
from  indemnification  by the Lessee as, as to the  extent,  provided in Section
8.01(b)(i)-(xiii) and 9.01(b)(i)-(xii) of the Participation  Agreement,  and (b)
the Trustor  shall not be required to  indemnify  with  respect to Trust  Claims
resulting  from a breach of the  covenants  by SSB in  Article 3 hereof or Trust
Claims resulting because any  representation or warranty of the Owner Trustee or
SSB, as the case may be, contained in any Operative Document proves to be untrue
or inaccurate or the failure by the Owner Trustee or SSB, as the case may be, to
perform or observe any  agreements,  covenants or  conditions to be performed or
observed  by it in  any of  the  Operative  Documents.  None  of  the  foregoing
exclusions  shall limit the  obligation of the Trustor to indemnify SSB (but SSB
shall still be required to seek  indemnification from the Lessee before making a
claim against the Trustor  hereunder unless such exclusion is otherwise  limited
under  Sections  8.01(b) and 9.01(b) of the  Participation  Agreement),  (i) for
actions taken in accordance with written instructions received from the Trustor,
and (ii) to the extent such exclusions are  attributable to acts or omissions of
the  Trustor.  The payor of any  indemnity  under  this  Section  5.01  shall be
surrogated to any right of the person indemnified in respect of the matter as to
which such  indemnity was paid. The  indemnities  contained in this Section 6.01
shall survive the termination of this Agreement.

         Section 6.02. Limitations on the Trustor's Liability. The Trustor shall
not have any liability for the performance of this Agreement except as expressly
set forth herein.

         Section 6.03. Fees; Compensation. Except as provided in Section 3.06(e)
or 6.01 hereof, the Owner Trustee agrees that it shall have no right against the
Trustor  or the  Trust  Estate  for any  fee as  compensation  for its  services
hereunder.

         Section 6.04. Supplements and Amendments.  At any time and from time to
time, only upon the written request of the Trustor (a) SSB and the Trustor shall
execute a supplement hereto for the purpose of adding provisions to, or changing
or  eliminating  provisions  of, this Agreement as specified in such request and
(b) the Owner Trustee  shall,  subject to the  provisions of Section 8.01 of the
Indenture, enter into or consent to such written amendment or modification of or
supplement  to any of the  Operative  Agreements  as the  Trustor  and any other
necessary  parties  may  agree to in  writing  and as may be  specified  in such
request,  or execute and deliver such written  waiver of the terms of any of the
Operative Agreements as may be agreed to in writing by the Trustor and as may be
specified  in such  request;  provided,  that (i) the  Owner  Trustee  shall not
execute any such supplement, amendment, waiver or modification without the prior
written consent of the Trustor,  (ii) if in the reasonable  opinion of the Owner
Trustee any  document  required  to be  executed by it pursuant to this  Section
adversely  affects any right or duty of, or immunity or  indemnity  in favor of,
the Owner Trustee under this  Agreement or any other  Operative  Agreement,  the
Owner Trustee may in its  discretion  decline to execute such document and (iii)
any amendment or supplement to this  Agreement  shall comply with the provisions
of Section 7.13 of the Participation  Agreement.  It shall not be necessary that
any request pursuant to this Section specify the particular form of the proposed
document to be executed pursuant to such request,  but it shall be sufficient if
such request shall indicate the substance thereof.  Promptly after the execution
by SSB or the Owner Trustee of any document pursuant to this Section,  the Owner
Trustee  shall mail a  conformed  copy  thereof to the  Trustor,  the  Indenture
Trustee  and the  Lessee,  but the  failure  of the Owner  Trustee  to mail such
conformed copies shall not impair or affect the validity of such document.

         Section  6.05.  Nature of Title of Trustor.  The Trustor shall not have
any legal title to any part of the Lessor's Estate. No transfer, by operation of
law or otherwise,  of the right, title and interest of the Trustor in and to the
Lessor's Estate or the trust hereunder shall operate to terminate this Agreement
or Lessor's Estate.

         Section 6.06. Power of Owner Trustee to Convey.  Any assignment,  sale,
transfer or other  conveyance  by the Owner Trustee of the interest of the Owner
Trustee in the  Operative  Agreements  or in the  Aircraft  or any part  thereof
pursuant to and in compliance  with the terms of this Agreement or the Operative
Agreements  shall bind the Trustor and shall be  effective to transfer or convey
all right,  title and  interest  of the Owner  Trustee  in and to the  Operative
Agreements or the right, title and interest of the Owner Trustee and the Trustor
in and to the Aircraft or such part thereof. No purchaser or other grantee shall
be  required  to  inquire  as to the  authorization,  necessity,  expediency  or
regularity  of  such  assignment,  sale,  transfer  or  conveyance  or as to the
application  of any sale or other  proceeds  with  respect  thereto by the Owner
Trustee.

         Section 6.07.  Notices.  All notices,  demands,  declarations  and other  communications  required by this
Agreement shall be given and become effective in the manner prescribed in the Participation Agreement.

         Section  6.08.  Situs of  Trust;  Applicable  Law;  Severability.  THIS
AGREEMENT  SHALL IN ALL  RESPECTS BE GOVERNED BY, AND  CONSTRUED  IN  ACCORDANCE
WITH,  THE INTERNAL LAWS OF THE STATE OF  CONNECTICUT,  INCLUDING ALL MATTERS OF
VALIDITY, CONSTRUCTION AND PERFORMANCE. If any provision of this Agreement shall
be invalid or unenforceable,  the remaining  provisions hereof shall continue to
be fully effective; provided, that such remaining provisions do not increase the
obligations or liabilities of the Owner Trustee or the Trustor.

         Section 6.09.  Successors and Assigns.  This Agreement shall be binding
upon and shall inure to the benefit of, and shall be enforceable by, the parties
hereto and their  respective  successors  and permitted  assigns,  including any
successive  holder  of the  Beneficial  Interest,  but  only to the  extent  the
Beneficial  Interest has been  transferred  or assigned in  accordance  with the
limitations of Section 7.03(d) of the Participation Agreement.

         Section  6.10.  Headings  and Table of  Contents.  The  headings of the
Articles and Sections of this  Agreement  and the Table of Contents are inserted
for convenience  only and shall not affect the meaning or construction of any of
the provisions hereof.

         Section 6.11.  Identification  of Trust.  This trust may for  convenience  be referred to as the "Atlantic
Coast Airlines Trust No. _______________."

         Section  6.12.  Counterparts.  This  instrument  may be executed in any
number of  counterparts  or upon  separate  signature  pages  bound  together in
several counterparts, each fully-executed set of which when so executed shall be
deemed to be an original, and such counterparts together shall constitute and be
one and the same instrument.

         Section  6.13.  Trustor  Interest.  The Trustor  has only a  beneficial
interest in any  specific  property  of this  Trust.  No creditor of the Trustor
shall have any right to obtain  possession  of, or otherwise  exercise  legal or
equitable  remedies  with  respect to, the property of this trust (as opposed to
the Trustor's beneficial interest in this trust).

         Section 6.14.  Performance by the Trustor.  Any obligation of the Owner
Trustee   hereunder  or  under  any  Operative   Agreement  or  other   document
contemplated  herein may be  performed  by the Trustor and any such  performance
shall not be construed as a revocation of the trust created hereby.



<PAGE>


         IN WITNESS  WHEREOF,  SSB and the Trustor have caused this Agreement to
be duly executed all as of the date first above written.

                                                     ATLANTIC COAST AIRLINES



                                                     By:
                                                          Name:  ______________________
                                                          Title:  _______________________



                                                     STATE STREET BANK AND TRUST COMPANY
                                                     OF CONNECTICUT, NATIONAL ASSOCIATION



                                                     By:
                                                          Name:  ______________________
                                                          Title:  _______________________

</TABLE>

<TABLE>
<S>     <C>      
EXHIBIT 10.50 (e)


                                    GUARANTY

                     (Atlantic Coast Airlines Trust No. N__)



                         dated as of September 30, 1997



                                       of



                          ATLANTIC COAST AIRLINES, INC.










                 One Canadair Regional Jet Series 200ER Aircraft





===================================================================================================================





<PAGE>



                                       ii

                                TABLE OF CONTENTS

                                                                                                          Page



1. Guarantee of Obligations.......................................................................................1
         (a) Guarantee............................................................................................1
         (b) Absolute Guarantee...................................................................................2
         (c) Guarantee of Payment and Performance.................................................................3
         (d) Waiver...............................................................................................3
         (e) Termination..........................................................................................3


2. Rights Limited to Guaranteed Parties...........................................................................4


3. Bankruptcy, etc................................................................................................4


4. Subrogation....................................................................................................4


5. Amendments and Other Actions...................................................................................4


6. Assignment.....................................................................................................4


7. Written Changes Only...........................................................................................5


8. Payments.......................................................................................................5


9. Representations, Warranties, and Covenants.....................................................................5
         (a) Organization.........................................................................................5
         (b) Authorization; Compliance............................................................................5
         (c) Approvals............................................................................................6
         (d) Validity of Guaranty.................................................................................6
         (e) Litigation...........................................................................................6
         (f) Financial Statements.................................................................................6
         (g) Tax Assessments......................................................................................6
         (h) Annual Reporting.....................................................................................6
         (i) ERISA................................................................................................6


10. Consent to Jurisdiction.......................................................................................7


11. Integration; Successors and Assigns...........................................................................7


12. Notices.......................................................................................................7


13. Governing Law.................................................................................................8


14. Costs and Expenses............................................................................................8


15. Performance...................................................................................................8



<PAGE>


8


                                    GUARANTY
                     (Atlantic Coast Airlines Trust No. N__)


         This Guaranty  (Atlantic Coast Airlines Trust No. N___) is issued as of
September  30,  1997 by Atlantic  Coast  Airlines,  Inc.  (the  "Guarantor"),  a
Delaware  corporation,  in favor of the parties listed in Schedule I hereto (the
"Guaranteed Parties").

         The terms in this  Guaranty  have the same meanings and usage as in the
Participation  Agreement  (Atlantic  Coast  Airlines  Trust  No.  _______)  (the
"Participation  Agreement"),  dated as of the date of this  Guaranty,  among the
Guaranteed  Parties and Atlantic  Coast  Airlines (the  "Lessee"),  a California
corporation.

         The  Guarantor  is the  direct or  indirect  owner of all of the common
stock of the Lessee.

         The  Guaranteed  Parties are unwilling to consummate  the  transactions
contemplated by the  Participation  Agreement  unless the Guarantor  issues this
Guaranty.

         The Guarantor therefore agrees as follows:


 .        1.       Guarantee of Obligations

         (a) Guarantee. The Guarantor acknowledges that it is fully aware of the
terms  and  conditions  of  the  Participation  Agreement,  the  Lease  (in  the
unexecuted  form  attached  to  the  Participation  Agreement),  and  the  other
Operative Agreements in effect on the date hereof (the "Guaranteed  Documents"),
and hereby irrevocably and unconditionally guarantees to the Guaranteed Parties,
as primary  obligor and not merely as surety,  without offset or deduction,  (1)
the  Lessee's  payment  of all its  payment  obligations  under  the  Guaranteed
Documents when due (including when due by virtue of the declaration of the Lease
to  be  in  default)  (the  "Financial  Obligations"),   and  (2)  the  Lessee's
performance of all its other  obligations  under the  Guaranteed  Documents (the
"Nonfinancial   Obligations")   (the  Financial   Obligations  and  Nonfinancial
Obligations being the "Obligations").

         If the  Lessee  fails  to  pay  any  Financial  Obligation  within  the
applicable grace period after it becomes due and payable, the Guarantor will pay
all  Financial  Obligations  then due and  payable,  upon  first  demand  of any
Guaranteed  Party  (such  demand  to be sent to the  Lessee  and the  Guarantor;
provided,  that the  failure  to make any such  demand  shall  not  relieve  the
Guarantor of its  obligations or  liabilities  hereunder and shall not impair or
affect the rights and  remedies,  express or implied,  or as a matter of law, of
any Guaranteed Party against the Guarantor).

         If the Lessee  fails to perform  any  Nonfinancial  Obligation  for any
reason when it is required to be performed and any  applicable  grace period has
expired,  the Guarantor will cause such Nonfinancial  Obligation to be performed
within five Business Days  following any  Guaranteed  Party's first demand (such
demand to be sent to the Lessee and the Guarantor; provided, that the failure to
make any such demand  shall not  relieve the  Guarantor  of its  obligations  or
liabilities  hereunder  and shall not impair or affect the rights and  remedies,
express or implied,  or as a matter of law, of any Guaranteed  Party against the
Guarantor).

         (b) Absolute Guarantee. The Guarantor's obligations under this Guaranty
shall be absolute and unconditional, shall remain in full force and effect until
irrevocable  payment,   performance,  or  observance  in  full  of  all  of  the
Obligations,  and shall not be affected by any action  taken or not taken by any
Guaranteed  Party,  by any lack of prior  enforcement or retention of any rights
against the Lessee or the Guarantor,  by any  illegality,  unenforceability,  or
invalidity of the Obligations or the Guaranteed Documents, by any other guaranty
or other obligations,  or by any other circumstance or condition (whether or not
the  Guarantor  or the  Lessee  shall  have any  knowledge  or notice  thereof),
including: (1) any termination,  amendment, modification, or other change in, or
supplement to, any of the Guaranteed Documents or any other agreement, or to the
Aircraft or any part thereof, or any assignment,  mortgage, or transfer thereof,
or any leasing or subleasing of the Aircraft, or any furnishing or acceptance of
additional  security,  or release of any security,  for the  obligations  of the
Lessee  under the  Guaranteed  Documents,  or the failure of any security or any
failure to perfect any interest in any collateral  given by the Lessee under the
Guaranteed  Documents;  (2) any failure,  omission,  or delay on the part of any
Person to  conform or comply  with any term of any  Guaranteed  Document  or any
other  agreement,  including  failure  to give  notice to the  Guarantor  of the
occurrence  of a  Default;  (3)  any  waiver  of the  payment,  performance,  or
observance  of any of the  obligations,  conditions,  covenants,  or  agreements
contained in any Guaranteed Document or any other agreement or any other waiver,
consent, extension, indulgence, compromise, settlement, release, or other action
or inaction under or in respect of any Guaranteed  Document,  or any exercise or
nonexercise  of any  right  or  remedy  under  any  Guaranteed  Document  or any
obligation or liability of the Lessee or any Guaranteed  Party,  or any exercise
or nonexercise of any right, remedy,  power, or privilege under or in respect of
any Guaranteed  Document or any such obligation or liability;  (4) any extension
of time  for  payment  or  performance  of any  Obligation;  (5)  the  exchange,
modification,  substitution,  or surrender of any  collateral;  (6) any failure,
omission,  or delay on the part of any Guaranteed Party to enforce,  assert,  or
exercise any right,  power,  or remedy  conferred on it in  connection  with any
Guaranteed  Document,  or any other action on the part of any Guaranteed  Party;
(7) any voluntary or  involuntary  bankruptcy,  insolvency,  assignment  for the
benefit of creditors, receivership, conservatorship, custodianship, liquidation,
marshalling of assets and liabilities, or similar proceeding with respect to the
Lessee, the Guarantor, or any other Person or any of their respective properties
or creditors,  or the disaffirmance in whole or in part of any of the Guaranteed
Documents in any such proceeding, or any action taken by any trustee or receiver
or by any  court in any such  proceeding;  (8) any  limitation  on the  Lessee's
liability  or  obligations  (or the  liabilities  and  obligations  of any other
Person) or any discharge, termination, cancellation,  frustration, irregularity,
invalidity,  or unenforceability,  in whole or in part, of any of the Guaranteed
Documents or any other agreement;  (9) any defect in the title,  compliance with
specifications,  condition,  design,  operation,  or  fitness  for  use  of  the
Aircraft,  or any  damage  to or loss or  destruction  of the  Aircraft,  or any
interruption  or cessation of the use of the Aircraft for any reason  (including
any force majeure and any act of a governmental or military authority); (10) any
merger or  consolidation  of the Lessee or the Guarantor  into or with any other
corporation,  or any sale,  lease, or other transfer of any of the assets of the
Lessee or the  Guarantor to any other  Person or any change in the  ownership of
the Guarantor or in the control of any such owner;  (11) to the extent permitted
by law, any release or discharge, by operation of law, of the Guarantor from the
performance or observance of any obligation, covenant, or agreement contained in
this  Guaranty;  and  (12) any  other  condition  or  circumstance  which  might
otherwise  constitute a legal or equitable  discharge,  release, or defense of a
surety or  guarantor,  or which  might  otherwise  limit  recourse  against  the
Guarantor,  including any discharge, release, defense, or limitation arising out
of any laws of the United  States of  America or any state  thereof or any other
governmental  entity having authority  thereover which would exempt,  modify, or
delay the due or punctual  payment and  performance  of the  obligations  of the
Guarantor  hereunder  (it being  agreed that the  obligations  of the  Guarantor
hereunder shall not be discharged except by payment or performance).  No failure
or delay in exercising  any right under this Guaranty  shall operate as a waiver
thereof, nor shall any single or partial exercise of any such right preclude any
other or further  exercise  thereof or the  exercise  of any other  right of any
Guaranteed Party under this Guaranty or the Guaranteed Documents.

         (c) Guarantee of Payment and Performance.  This Guaranty is a guarantee
of payment  and  performance  and not merely of  collection,  and the  Guarantor
waives any right to  require  that any  action  against  the Lessee or any other
Person or any  collateral  or security be taken or  exhausted  before  action is
taken against the Guarantor.  No Guaranteed  Party shall be required (1) to file
suit or to  proceed  to obtain  or assert a claim  against  the  Lessee  for the
Obligations,  (2) to make any effort at collection of the  Obligations  from the
Lessee,  (3) to foreclose  against or seek to realize upon any present or future
security for the Obligations, (4) to file suit or to proceed to obtain or assert
a  claim  for  personal  judgment  against  any  other  Person  liable  for  the
Obligations,  or to make any effort at collecting the Obligations  from any such
other  Person,  or to  exercise or assert any other right or remedy to which any
Guaranteed  Party is or becomes  entitled in connection  with the Obligations or
any security or other guarantee therefor,  or (5) to assert or to file any claim
against  the assets of the  Lessee or any other  guarantor  or any other  Person
liable for the Obligations, or any part thereof, either before or as a condition
to enforcing  the  Guarantor's  liability  under this Guaranty or to require the
Guarantor to pay or perform the Obligations at any time thereafter.

         (d) Waiver.  Except as otherwise expressly provided in this Guaranty or
any  other  Operative   Agreement,   the  Guarantor  hereby  waives   diligence,
presentment,  demand, protest, and notice of any kind whatsoever with respect to
this  Guaranty or the  Obligations,  including  (1) notice of acceptance of this
Guaranty, notice of nonpayment or nonperformance of any of the Obligations,  and
notice of a Default;  (2) any  requirement  to exhaust any remedies  exercisable
upon a default under any Guaranteed Document or other agreement;  (3) any notice
of any sale, transfer, or other disposition of any right or title to or interest
in the Aircraft or any part thereof;  and (4) any other circumstance  whatsoever
which might otherwise  constitute a legal or equitable  discharge,  release,  or
defense of a guarantor or surety or which might otherwise limit recourse against
the Guarantor.

         (e)  Termination.  The Guarantor's  obligations  under this ss. 1 shall
terminate  (subject to  reinstatement  under ss. 3 hereof) when the  Obligations
have been irrevocably paid and performed in full.


         2. Rights Limited to Guaranteed Parties. This Guaranty shall not create
any right in any  Person  except the  Guaranteed  Parties  (and their  permitted
successors  and  assigns),  and shall not be  construed  in any  respect to be a
contract in whole or in part for the benefit of any other Person.


  If at any time  all or any  part of any  payment  or  performance  theretofore
applied to any of the  Obligations  is or must be  rescinded or returned for any
reason whatsoever  (including the bankruptcy,  insolvency,  or reorganization of
the Lessee),  such  Obligations  shall,  for purposes of this  Guaranty,  to the
extent  rescinded  or  returned,  be  deemed  to have  continued  in  existence,
notwithstanding  such  application  by any Guaranteed  Party,  and this Guaranty
shall continue to be effective or be reinstated,  as the case may be, as to such
Obligations all as though such  application by any Guaranteed Party had not been
made.  If an event  permitting  the  declaration  of default  under a Guaranteed
Document exists at any time, and such declaration of default is prevented by the
pendency  against  Lessee or any other  Person of a case or  proceeding  under a
bankruptcy  or  insolvency  law,  then for  purposes  of this  Guaranty  and the
Guarantor's  obligations hereunder,  such Guaranteed Document shall be deemed to
have  been  declared  in  default  with the same  effect  as if such  Guaranteed
Document had been  enforceable  in accordance  with the terms  thereof,  and the
Guarantor  shall  forthwith  pay the amounts due  hereunder  as specified by any
Guaranteed  Party,  any  interest  thereon,  and any  other  amounts  guaranteed
hereunder, without further notice or demand.


         4. Subrogation.  If the Guarantor makes a payment to a Guaranteed Party
under this  Guaranty,  the  Guarantor  shall be  subrogated  to that  Guaranteed
Party's claims against the Lessee or any other Person  relating to that payment.
Any such  subrogation  right shall be subject and  subordinate to the Guaranteed
Parties'  rights  under the  Guaranteed  Documents.  No payment  or  performance
hereunder by the Guarantor shall give rise to any claim of the Guarantor against
any of the Guaranteed  Parties;  provided,  that this sentence shall not prevent
the Guarantor from being subrogated to any claim available to the Lessee.


         5.  Amendments  and Other  Actions.  Any  Guaranteed  Party may, in its
discretion,  and without  affecting the Guarantor's  absolute and  unconditional
liability  under  this  Guaranty,   agree  to  amendments,   modifications,   or
supplements to the Lease, the Indenture,  the other Guaranteed Documents, or any
other agreement, give or withhold consents,  waivers, or approvals, and exercise
or refrain from  exercising  rights under the Lease,  the  Indenture,  the other
Guaranteed Documents, or any other agreement.


         6.  Assignment.  Any  Guaranteed  Party may at any time  sell,  assign,
transfer,  or  otherwise  dispose  of its  interest  in all or any  part of this
Guaranty, the Lease, the Indenture, the other Guaranteed Documents, or any other
agreement and in the property and interests subject thereto and hereto,  subject
to any  limitations and conditions  thereon in any such  Guaranteed  Document or
other  agreement.  To the extent of the interest  acquired by it, any purchaser,
assignee,  transferee,  or  other  party so  acquiring  any  Guaranteed  Party's
interest  shall have the same rights as such assigning  Guaranteed  Party hereby
and shall be deemed and declared a "Guaranteed  Party" hereunder.  The Guarantor
shall not assign any of its rights or obligations hereunder, including any claim
arising by subrogation.


 . No amendment,  waiver,  or consent  under the terms of this Guaranty  shall be
effective  unless  evidenced by an instrument in writing signed by the Guarantor
and each Guaranteed Party.


 . All payments by the Guarantor  hereunder shall be made in the United States in
U.S.  dollars and in immediately  available  funds, and otherwise as provided in
the Guaranteed Documents pursuant to which the relevant Obligations are created.
All payments hereunder shall be made free and clear of, and without deduction or
withholding  for or on account of, any taxes,  levies,  fees,  imposts,  duties,
expenses,  commissions,  withholdings,  assessments,  or other charges, together
with all penalties, fines, additions to tax, and interest thereon (collectively,
"Taxes")  to the extent  that any such Taxes  would  reduce the amount  that the
Guaranteed  Party  receiving the payment  otherwise  would have received had the
Lessee made such  payment.  If any Taxes must be  deducted or withheld  from any
payment  hereunder,  the  Guarantor  shall  increase the amount paid so that the
Guaranteed  Party receiving the payment  receives the full amount of the payment
provided for in this Guaranty on an After-Tax Basis.


         9.       Representations,  Warranties,  and Covenants.  The Guarantor  hereby  represents,  warrants,  and
covenants to the Guaranteed Parties as follows:

         (a)  Organization.  The Guarantor is a corporation  duly  organized and
existing under the laws of Delaware, and has the power and authority to carry on
its business as now  conducted,  to own or to hold under lease the properties it
holds  itself  out as owning  or  leasing,  and to enter  into and  perform  its
obligations under this Guaranty.

         (b)  Authorization;   Compliance.  The  Guarantor  has  the  power  and
authority to issue this Guaranty.  This Guaranty has been duly authorized by all
necessary  action on the Guarantor's  part, and does not require any approval or
other action of the  shareholders of the Guarantor or approval or consent of any
trustee or holders of any indebtedness or obligations of the Guarantor or of any
other  Person,  except such as have been  obtained,  and the  Guarantor has duly
executed and delivered this Guaranty. The Guarantor's  execution,  delivery, and
performance  of  this  Guaranty  are  not  inconsistent   with  the  Guarantor's
certificate of  incorporation or by-laws,  do not contravene any law,  judgment,
decree,  governmental rule, regulation, or order applicable to or binding on the
Guarantor,  and do not  contravene,  result in any breach of, or constitute  any
default or result in the creation of any Lien under,  any  indenture,  mortgage,
security agreement, deed of trust, or other agreement or instrument to which the
Guarantor is a party or by which the Guarantor or its properties are bound which
reasonably  may  be  expected  to  have  a  materially  adverse  effect  on  the
Guarantor's financial condition or ability to perform its obligations under this
Guaranty.

         (c) Approvals.  Neither the Guarantor's  execution and delivery of this
Guaranty,   nor  the  Guarantor's   consummation  of  any  of  the  transactions
contemplated  hereby,  requires  the  consent or approval  of,  giving of notice
(other than subsequent reporting  requirements) to, registration with, or taking
of any other action in respect of, any governmental  authority or agency, except
any which are in full force and effect.

         (d) Validity of  Guaranty.  This  Guaranty has been duly entered  into,
executed,  and delivered and constitutes a legal,  valid, and binding obligation
of the  Guarantor,  enforceable  against the  Guarantor in  accordance  with its
terms.  The  Guarantor's   obligations  under  this  Guaranty  rank,  and  until
discharged  in full will  continue to rank,  in right of payment  and  security,
equally and ratably in all respects with all the Guarantor's  present and future
unsecured and unsubordinated indebtedness for borrowed money.

         (e) Litigation.  There are no pending or, to the Guarantor's knowledge,
threatened actions or proceedings  before any court or administrative  agency of
the  United  States  or any  state  thereof,  which  may be  expected  to have a
materially adverse effect on the Guarantor's  financial  condition or ability to
perform its obligations under this Guaranty.

         (f) Financial  Statements.  All  financial  statements of the Guarantor
that the Guarantor or its agents  delivered to any  Guaranteed  Party before the
date of this Guaranty have been prepared in accordance  with generally  accepted
accounting  principles  and are true and  correct  as of the  date  thereof.  No
materially  adverse change has occurred in the Guarantor's  financial  condition
since the latest date of such financial statements.

         (g) Tax  Assessments.  The Guarantor  does not know of any proposed tax
assessment against it and, in the Guarantor's  opinion,  all the Guarantor's tax
liabilities are adequately provided for.

         (h) Annual  Reporting.  During the Term, the Guarantor shall furnish to
each  Guaranteed  Party:  (x)  in  such  quantities  as  each  Guaranteed  Party
reasonably requests, within 120 days after close of each fiscal year, an audited
balance  sheet and related  statements  of  operations  and changes in financial
position of the Guarantor as of the end of such fiscal year,  and (y) within the
period set forth in clause (x) above, a certificate  of the Guarantor  signed on
its behalf by the President or a financial  officer stating that it has reviewed
the activities of the Lessee and that, to the best of its knowledge,  no Default
exists (or if a Default  exists,  specifying  the nature and period of existence
thereof and the action  that  Lessee has taken or proposes to take with  respect
thereto).

         (i) ERISA. The Guarantor does not maintain or contribute to, and is not
obligated to contribute to, any Plan.


         10. Consent to Jurisdiction.  The Guarantor irrevocably agrees that any
legal action or proceeding  brought  against the Guarantor  with respect to this
Guaranty may be brought and  determined in the Supreme Court of the State of New
York, New York County,  or in the United States  District Court for the Southern
District of New York, and the Guarantor hereby  irrevocably  accepts with regard
to any such action or proceeding,  for itself and in respect of its  properties,
generally and  unconditionally,  the nonexclusive  jurisdiction of those courts.
The Guarantor hereby  irrevocably  waives,  and agrees not to assert,  by way of
motion,  as a defense  or  counterclaim,  or  otherwise,  in any such  action or
proceeding,  any claim that it is not personally  subject to the jurisdiction of
the  foregoing  courts,  that  it or its  property  is  exempt  or  immune  from
jurisdiction of any court or from any legal process  (whether through service of
notice,  attachment  prior  to  judgment,  attachment  in aid of  execution,  or
otherwise),  and, to the extent  permitted  by law,  that the suit,  action,  or
proceeding  is brought  in an  inconvenient  forum,  that the venue of the suit,
action,  or proceeding is improper,  or that this Guaranty or the subject matter
hereof may not be enforced in or by such courts, and further irrevocably waives,
to the extent  permitted by law, the benefit of any defense that would hinder or
delay the levy,  execution,  or collection of any amount to which any Guaranteed
Party is entitled pursuant to a final judgment of any court having  jurisdiction
(provided,  that this  sentence  shall not waive any  requirement  of service of
process).  Nothing herein shall affect any Guaranteed  Party's right to commence
legal  proceedings  or  otherwise  proceed  against the  Guarantor  in any other
jurisdiction in which the Guarantor shall be subject to suit.


         11. Integration;  Successors and Assigns. This Guaranty constitutes the
entire agreement,  and supersedes all prior agreements and understandings,  both
written and oral, among the Guarantor and the Guaranteed  Parties,  with respect
to  the  subject  matter  hereof.  This  Guaranty  shall  bind  the  Guarantor's
successors and assigns, and shall benefit, and be enforceable by, the Guaranteed
Parties and their successors and assigns.


         12. Notices. All requests,  demands,  notices, and other communications
hereunder shall be in writing (including telecopies), shall be in English, shall
be effective  on  delivery,  and shall be addressed as follows (or to such other
address as any such person shall designate by notice to each other such person):

         if to the Guarantor:

                  Atlantic Coast Airlines, Inc.
                  515A Shaw Road
                  Dulles, VA 20166
                  Attention:  General Counsel
                  Fax:  (703) 925-6294
                  Tel:  (703) 925-6006

         if to any Guaranteed Party:

                  to its address set forth in the Participation Agreement.


 . This  Guaranty is  delivered  in, and shall in all respects be governed by and
construed  in  accordance  with the  laws of,  the  state  of New  York,  U.S.A.
(excluding  any  conflicts-of-laws  rule that would  apply the laws of any other
jurisdiction).


 . The Guarantor  agrees to pay to any  Guaranteed  Party any and all  reasonable
expenses  (including  reasonable  legal  fees  and  expenses)  incurred  by such
Guaranteed  Party in  enforcing  this  Guaranty,  together  with any  reasonable
expenses   (including   reasonable  legal  fees)  incurred  on  account  of  the
Guarantor's bankruptcy or insolvency.


 . The Guarantor's  performance of any or all of the Obligations  shall,  for all
purposes of the Guaranteed  Documents,  constitute  performance by the Lessee of
such Obligations.




<PAGE>







         IN WITNESS WHEREOF, the Guarantor has executed this Guaranty (Atlantic Coast Airlines Trust No. N___).


                                                     ATLANTIC COAST AIRLINES, INC.



                                                     By:      ___________________________


                                                     Title:   ___________________________



<PAGE>




                                                                                                         Schedule I
                                                                                                        to Guaranty



                               Guaranteed Parties


State Street Bank and Trust  Company of  Connecticut,  National  Association,  individually  and as trustee  [Owner
Trustee and Lessor]

The First National Bank of Maryland,  individually  and as trustee  [Indenture  Trustee,  Pass-Through  Trustee and
Subordination Agent]


ING Bank N.V. [Liquidity Provider]

</TABLE>

<TABLE>
<S>     <C>  
EXHIBIT 10.80

                             GROUND LEASE AGREEMENT

                                     BETWEEN

                                       THE

                   METROPOLITAN WASHINGTON AIRPORTS AUTHORITY

                                       AND

                             ATLANTIC COAST AIRLINES

                                       TO

                     DESIGN, CONSTRUCT, OPERATE AND MAINTAIN

                        AN AIRCRAFT MAINTENANCE FACILITY

                                       AT

                     WASHINGTON DULLES INTERNATIONAL AIRPORT



<PAGE>


                                      INDEX

                             ATLANTIC COAST AIRLINES
                          AIRCRAFT MAINTENANCE FACILITY


ARTICLE  SUBJECT                                                                        PAGE

I                 Airport Premises . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2

II                Rights and Obligations of the Lessee . . . . . . . . . . . . . . . . . . . . . . .          2

III               Term of Lease . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10

IV                Rental Fees and Other Charges . . . . . . . . . . . . . . . . . . . . . . . . . . .        12

V                 Establishment of Facility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25

VI                Schedule for Submitting Plans and Specifications . . . . . . . . . . . . .              29

VII               Title to the Facility, Fixed Improvements,
                    and Operating Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31

VIII              Certified Cost of Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33

IX                Maintenance of the Aircraft Maintenance Premises. . . . . . . . . . . . .               35

X                 Leasehold Mortgages  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39

XI                Assignment and Subletting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
64

XII               Termination by the Authority . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
68

XIII              Termination by the Lessee  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
71

XIV               Destruction and Improvements  . . . . . . . . . . . . . . . . . . . . . . . . . . . .      72

XV                Insurance and Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    75

XVI               Performance Guarantee and Bonds  . . . . . . . . . . . . . . . . . . . . . . . .           79

XVII              Late Charges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
81



<PAGE>


                                                                                                           Page 2

ARTICLE  SUBJECT                                                                        PAGE

XVIII             Airport Rules and Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    82

XIX               Copartnership  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
82

XX                Participation in Lease . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
82

XXI               Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 . . .             83

XXII              Signs  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
 . . . .           83

XXIII             Quiet Enjoyment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
83

XXIV              Right of Inspection of Premises . . . . . . . . . . . . . . . . . . . . . . . . . . . .    84

XXV               Saving Provision  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84

XXVI              Waiver of Performance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84

XXVII             Certification of the Lessee's Status . . . . . . . . . . . . . . . . . . . . . . .         85

XXVIII   Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
85

XXIX              Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86

XXX               Federal Requirements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93


<PAGE>



Lease No. MWAA-LD-97-04
Page 1 of 97 Pages
         This Ground Lease Agreement  (hereinafter  referred to as the "Lease"),
entered  into by and  between the  Metropolitan  Washington  Airports  Authority
(hereinafter  referred to as the  "Authority")  and Atlantic Coast  Airlines,  a
California  corporation  qualified to transact  business in the  Commonwealth of
Virginia d.b.a United  Express  (hereinafter  referred to as the "Lessee").  The
Authority and the Lessee together are referred to as the "Parties."
                               W I T N E S S E T H
         WHEREAS, pursuant to the lease agreement,  dated March 2, 1987, between
the United States of America,  acting  through the Secretary of  Transportation,
and the  Authority,  the  Authority  controls  certain  real  property  known as
Washington  Dulles  International   Airport  (hereinafter  referred  to  as  the
"Airport")  and,  subject to the lease,  has full power and dominion  over,  and
discretion in the operation and development of the Airport; and
         WHEREAS,  the Lessee  desires to  construct,  operate  and  maintain an
aircraft  maintenance facility for the purpose of performing routine and special
maintenance  on its fleet of aircraft and aircraft  operated by other  scheduled
air carriers; and
         WHEREAS,  the Authority has an aircraft  maintenance site available for
         development  on the Airport;  and WHEREAS,  the Lessee has  submitted a
         proposal to design, construct, operate, and maintain such an
aircraft maintenance facility, and the Authority has accepted the Lessee's proposal to do so on the terms and
conditions expressed herein; and


<PAGE>


         WHEREAS,  the Lessee intends to utilize the proceeds of bonds issued by
the Industrial Development Authority of Loudoun County, Virginia, to finance the
development of the aircraft maintenance facility.
         NOW,  THEREFORE,   in  consideration  of  the  charges,   fees,  mutual
covenants, conditions, and agreements contained herein, the Parties hereto agree
as follows:

                          ARTICLE I - AIRPORT PREMISES
         For the  purpose  of  designing,  constructing,  financing,  operating,
maintaining,  repairing,  replacing,  renovating,  and  restoring,  an  aircraft
maintenance  facility that includes an aircraft  maintenance hangar with office,
shops,  and parts warehouse  storage,  a concrete  aircraft  parking apron,  and
automobile  parking area, the Authority  hereby demises and leases to the Lessee
and the Lessee hereby accepts and leases from the  Authority,  subject to all of
the terms  and  conditions  expressed  herein,  the plot of land on the  Airport
containing  5.64  acres  and  the  aircraft  maintenance  facility  and  related
improvements to be constructed thereon (hereinafter referred to as the "Aircraft
Maintenance  Premises") as shown on Drawing No.  2231-001,  attached  hereto and
made a part hereof as Exhibit A,  together with rights of ingress,  egress,  and
access from the North Service Road to the Aircraft Maintenance Premises.

                ARTICLE II - RIGHTS AND OBLIGATIONS OF THE LESSEE


<PAGE>


         A.       The   Authority   does  hereby   grant  unto  the  Lessee  the
                  nonexclusive   right  and  privilege  to  design,   construct,
                  finance,  operate,  maintain,  repair, replace,  renovate, and
                  restore,  an aircraft  maintenance  facility on the Airport on
                  behalf of the Authority, but not as the agent, representative,
                  or  partner  of  the  Authority.  The  Authority  may,  at its
                  discretion,  either  construct and operate  itself,  or permit
                  others to construct and operate,  other  aircraft  maintenance
                  facilities on the Airport.
         B.       The Authority does hereby grant unto Lessee the exclusive lease of the Aircraft Maintenance
                  Premises and the nonexclusive right to provide routine and special maintenance from the
                  Aircraft Maintenance Premises for the servicing of aircraft operated by the Lessee, aircraft
                  of other companies providing commercial air transportation of persons, property, and/or mail
                  pursuant to published schedules to and from the Airport and holding the necessary authority
                  from the appropriate Federal or state agencies to provide such air transportation services
                  (hereinafter referred to as "Scheduled Air Carriers") or Scheduled Air Carriers who have
                  executed an Airport Use Agreement and Premises Lease with the Authority (hereinafter referred
                  to as "Airlines").  The Lessee shall not have the right to perform maintenance services on
                                                       ---
                  private or corporate aircraft not used in the common carriage of passengers, cargo, or
                  freight, or aircraft used as a non-scheduled charter operation or air taxi (hereinafter
                  referred to as "General Aviation aircraft").


<PAGE>


         C.       The routine and special maintenance service (hereinafter referred to as "Aircraft Maintenance
                  Services") to be performed from the Aircraft Maintenance Premises shall include, but not be
                  limited to, the maintenance, servicing, testing, and modification of aircraft, including
                  without limitation the finishing, refitting, repairing, inspecting, installing, painting,
                  stripping, cleaning, rewiring, reprogramming, and replacing of components (including without
                  limitation, avionics, power plants, interiors, mechanical systems, navigation systems, and
                  communication systems); retrofitting, upgrading, refurbishing, reconfiguring, re-engining and
                  conversion of aircraft; the maintenance of such hanger, office and shop space and related
                  facilities necessary for, or related to, such activities; maintenance and repair of ground
                  support equipment including without limitation vehicles, tugs, baggage carts, special-purpose
                  vehicles and other airfield equipment; and undertaking of ground activity necessary for the
                  support of such activities.  Aircraft Maintenance Services shall also include the obtaining,
                  installing, storing, and operating of all necessary material, machinery, and equipment to
                  maintain, repair, store, and park vehicles and equipment used and necessary to support the
                  services permitted herein.  No other use may be made of the Aircraft Maintenance Premises
                  without the advanced written approval of the Authority.
         D.       The Authority  shall have the continuing  right to approve the
                  kind and scope of any  additional  activities  proposed  to be
                  conducted  on or from the  Aircraft  Maintenance  Premises  in
                  addition to those specifically referred to herein.


<PAGE>


         E.       No other commercial business or concession shall be operated on or from the Aircraft
                  Maintenance Premises unless authorized in advance by this Lease, or approved in writing by the
                  Authority.  The Lessee shall not use, or suffer or permit any person or party to use, the
                  Aircraft Maintenance Premises for any purpose not authorized under this Lease or by separate
                  written approval of the Authority.  All restrictions or requirements imposed by this Lease on
                  the Lessee shall be deemed to extend to the Lessee's agents, customers, tenants, employees,
                  contractors, subcontractors, and guarantors.  It shall be the Lessee's obligation to cause
                  these persons and parties to comply with the restrictions or requirements of this Lease.
         F.       The Lessee shall  provide,  at its own cost and  expense,  the
                  necessary  skilled  management  and  labor  to  ensure,  on  a
                  continuing basis  throughout the term of this Lease,  that the
                  Aircraft  Maintenance  Premises  is  operated  and  maintained
                  efficiently,  and in a manner  reasonably  satisfactory to the
                  Authority.


<PAGE>


         G.       The Lessee shall, at its own cost and expense, comply with all mandatory Federal, state, or
                  local laws, ordinances, rules or regulations including directives and regulations of the
                  Authority, now or hereafter in force, governing the establishment, maintenance, and operation
                  of the Aircraft Maintenance Premises.  All such ordinances, rules, or regulations shall be
                  applied in a nondiscriminatory manner, provided, provisions of future Authority directives and
                  rules and regulations, as applied to Lessee, shall not adversely affect Lessee's use of the
                  Aircraft Maintenance Premises as provided for by this Lease.  The Lessee shall obtain and pay
                  for all licenses and permits necessary for the establishment, maintenance, and operation of
                  the Aircraft Maintenance Premises by the Lessee, and shall pay all fees and charges applicable
                  to the Lessee and assessed under state, local, or Federal statutes or ordinances.


<PAGE>


         H.       For the purposes described in Article II hereof, and elsewhere herein, the Authority grants to
                  the Lessee, and the employees, customers, contractors, suppliers, service personnel,
                  licensees, guests, patrons, tenants, and invitees of the Lessee, without charge therefor, the
                  right of ingress to and egress from the Aircraft Maintenance Premises over the Airport roadway
                  system; PROVIDED, that such rights of ingress and egress shall at all times be exercised in
                  compliance with any and all regulations promulgated by lawful authority for the care,
                  operation, maintenance, and protection of the Airport and applicable to all users of the
                  Airport; AND PROVIDED FURTHER, that such rights of ingress and egress shall not be construed
                  to prohibit the Authority from establishing and assessing a reasonable fee or charge for the
                  privilege of entry upon the Airport when such a fee or charge is levied upon all users of the
                  Airport, nor to prohibit the Authority from assessing a fee or charge on persons conducting a
                  commercial business on the Airport; AND PROVIDED FURTHER, that in no event shall the Authority
                  prevent or impede access to the Aircraft Maintenance Premises.
         I.       The Lessee,  and the customers,  tenants,  and invitees of the
                  Lessee may make use of the runways and taxiways of the Airport
                  to gain  access to the  Aircraft  Maintenance  Premises  as is
                  permitted by the Authority's rules and regulations and subject
                  to the fees and charges  assessed  aircraft for the use of the
                  Airport.


<PAGE>


         J.       The Lessee shall abide by all airfield and other security related requirements established by
                  the Authority, which apply to the Lessee and employees, service personnel, guests, visitors,
                  contractors, patrons, and invitees of the Lessee.  The Authority is required by Federal
                  Aviation Regulations (FAR), Part 107, to, "adopt and put into use facilities and procedures
                  designed to prevent and deter persons and vehicles from unauthorized access to the "Air
                  Operations Area."  The Lessee understands that the Authority has met said requirements by
                  developing a security plan for the Airport, and the operations of the Lessee shall not
                  conflict with the security standards set forth in said plan.  The Lessee shall prepare and
                  submit for the Authority's approval, which approval shall not be unreasonably withheld, its
                  own plans to provide facilities and procedures designed to prevent and deter persons and
                  vehicles from unauthorized access to the Air Operations Area from and through any premises
                  controlled or used by the Lessee in accordance with the provisions of FAR, Part 107, and the
                  security plan for the Airport.  To meet the requirements of Part 107, the Lessee's security
                  procedures and facilities on the Aircraft Maintenance Premises shall insure positive control
                  which shall prevent the entrance of unauthorized persons and vehicles onto the Air Operations
                  Area of the Airport and shall include but not be limited to:
                  1.       Fencing and locked gates,
                  2.       Visible   identification    materials   for   persons
                           authorized to enter the Air Operations Areas,
                  3.       An  electronic  entry  control  system where gates or
                           doorways  cannot  reasonably  be controlled by locks,
                           and
                  4.  Other  facilities  and  procedures  as may  be  reasonably
required by the Authority.


<PAGE>




         K.       Prohibited Uses.  Lessee shall not use the Aircraft Maintenance Premises nor permit the same
                  ---------------
                  to be used by its customers, tenants, invitees, contractors, service personnel or employees to
                  provide services, facilities, commodities, or supplies made available through concessionaires
                  or other contractors under contract with the Authority to provide such services, facilities,
                  commodities, or supplies on the Airport ("Prohibited Uses"); provided, however, that Aircraft
                                                                               --------  -------
                  Maintenance Services, as defined in Article II.C. above, shall not be prohibited hereunder.
                  Prohibited Uses include, but are not limited to:  the providing of services, facilities,
                  commodities, or supplies now or hereafter made available through other concessionaires and
                  contractors on the Airport (other than Aircraft Maintenance Services), and the operation of
                  automobile or vehicle rental businesses, airline inflight kitchens, air cargo facilities, or
                  commercial vehicle parking for the general public.  Lessee shall not use the Aircraft
                  Maintenance Premises for the storage, transportation, disposal, discharge, or handling of any
                  hazardous substances, except for the storage, transportation, disposal, discharge, or handling
                  of such substances reasonably necessary for the conduct of Aircraft Maintenance Services.
                  Under no circumstances shall any use be made of, or conduct occur on, the Aircraft Maintenance
                  Premises, which use would cause the Aircraft Maintenance Premises or any part thereof to be
                  deemed a hazardous waste treatment, storage, or disposal facility requiring a permit, interim
                  status, or any other special authorization under any Environmental Laws.  Lessee agrees that
                  storage of aircraft fuel upon or within the Aircraft Maintenance Premises (except for fuel
                  brought on the same in fuel tanks of aircraft) is prohibited and that purchases of aircraft
                  fuel for delivery at the Airport shall be made only from service contractors authorized by the
                  Authority to deliver or sell such fuel.  All subleases involving any portion of the Aircraft
                  Maintenance Premises shall incorporate in substance the terms of this Lease.

                           ARTICLE III - TERM OF LEASE
         A.       The term of this Lease shall commence upon the date of execution by the Authority and shall
                  expire at the end of the Operating Period of the Lease.  The Operating Period of the Lease
                  shall extend for a period not to exceed twenty-six (26) years ten (10) months and twenty-one
                  (21) days from the date on which the Authority issues its occupancy permit or equivalent
                  stating that the Aircraft Maintenance Premises is ready for occupancy and use by the Lessee.
                  The Parties hereto shall establish this date in writing, and that date, when established,
                  shall begin the Operating Period.  There shall be no occupancy or use of the Aircraft
                  Maintenance Premises by Lessee for the conduct of Aircraft Maintenance Services prior to the
                  beginning of the Operating Period.



<PAGE>


                  In no event  shall  the  Operating  Period  exceed  80% of the
                  confirmed or adjusted  expected  useful  economic  life of the
                  Aircraft Maintenance  Premises. In this regard, the Lessee has
                  provided the Authority with a written appraisal, acceptable to
                  the Authority,  establishing the expected useful economic life
                  of the  Aircraft  Maintenance  Premises  at  thirty-three  and
                  six-tenths (33.6) years. Eighty percent (80%) of the 33.6 year
                  expected  useful  economic  life of the  Aircraft  Maintenance
                  Premises is the term of the  Operating  Period  stated in this
                  paragraph A.
         B.       In the event that Lessee does not comply with the schedule set forth in Article VI.C. hereof,
                  but subject to the conditions and extensions of time provided for herein, the Authority shall
                  have the option to terminate this Lease and all of Lessee's rights hereunder after such date
                  by giving sixty (60) days prior written notice of the termination to Lessee and by designating
                  any improvements on the Aircraft Maintenance Premises to be removed by Lessee.  Lessee shall
                  then, at its own expense, demolish and remove all Authority-designated improvements, including
                  the aircraft maintenance hangar building and any related improvements on the Aircraft
                  Maintenance Premises.  Upon such termination becoming effective, the Authority shall be hereby
                  relieved of its obligations hereunder and shall be free to lease the land to other parties.
         C.       Upon the  termination or expiration of this Lease,  the Lessee
                  shall  deliver  the  Aircraft   Maintenance  Premises  to  the
                  Authority  in  good   condition,   reasonable  wear  and  tear
                  excepted. Lessee shall pay to the Authority the costs, if any,
                  incurred by the  Authority to bring the  Aircraft  Maintenance
                  Premises up to such condition.


<PAGE>


D.       Lessee  understands  that  there  is  no  renewal  or  purchase  option
         contained   herein  or  otherwise  agreed  to  and  that  there  is  no
         expectation of any such renewal or purchase option.

                   ARTICLE IV - RENTAL FEES AND OTHER CHARGES
         In  consideration  of the rights and  privileges  granted  herein,  the
Lessee agrees to pay to the Authority an annual  ground  rental;  a service cost
fee; utility payments; and, if applicable,  a percentage and sublease rental fee
from the gross receipts  realized by the Lessee by virtue of providing  Aircraft
Maintenance  Services  and/or the sublease of space on the Aircraft  Maintenance
Premises to its customers as permitted by this Lease.  Except for the percentage
and sublease rental fee that is paid quarterly, all other payments shall be made
monthly,  commencing  at the beginning of the  Operating  Period and  continuing
monthly until the expiration of the term of this Lease, as follows:
         A.       Annual  Ground  Rental  - An  annual  ground  rental  shall be
                  prorated monthly and paid monthly in advance  beginning on the
                  first day of each calendar  month of the Operating  Period and
                  continuing   until  the  expiration  of  this  Lease.  If  the
                  Operating  Period  begins or this  Lease  terminates  on a day
                  other  than  the  first  day of the  month,  rental  shall  be
                  prorated  on a daily  basis for that  portion of the first and
                  last month.


<PAGE>


                  1.       The annual  ground  rental shall be calculated as the
                           appraised  market value of the land leased under this
                           Lease  times  a  seven  percent  (7%)  capitalization
                           ratio;  PROVIDED,  HOWEVER,  that  no  annual  ground
                           rental shall be charged for the land  comprising  the
                           aircraft  parking  apron on the Aircraft  Maintenance
                           Premises.
                  2.       For the initial five (5) years of the Operating Period, the Lessee shall pay an
                           annual ground rental of Sixty-Six Thousand Nine Hundred and Twelve Dollars
                           ($66,912.00) payable in monthly payments of Five Thousand Five Hundred and
                           Seventy-Six Dollars ($5,576.00)  This is calculated as (1) the initial appraised
                           market value of the land leased under this Lease at $4.85 per square foot, multiplied
                           by (2) the portion of the Aircraft Maintenance Premises to which the annual ground
                           rental applies (197,090 sq. ft.), multiplied by (3) the capitalization ratio of seven
                           percent (7%).


<PAGE>


                  3.       For the second and each of the subsequent five (5) year terms of the Operating
                           Period, the annual ground rental shall be adjusted to reflect any change in the
                           appraised market value of land leased under this Lease.  In this regard, land shall
                           be reappraised during the fifth, tenth, fifteenth, twentieth and twenty-fifth year of
                           the Operating Period to facilitate the rental adjustment.  Once the new appraised
                           market value of the land has been determined, the new annual ground rental shall be
                           calculated by multiplying 7% times the new appraised market value of the land leased
                           under this Lease to which the ground rental applies (i.e. the Aircraft Maintenance
                           Premises less the land area comprising the aircraft apron on the Aircraft Maintenance
                           Premises).  The new annual rental shall become effective and due on the first day of
                           the sixth year of the Operating Period and shall continue each and every month until
                           it is again adjusted on the first day of the eleventh, sixteenth, twenty-first and
                           twenty-sixth year of the Operating Period.  Notwithstanding the foregoing, however,
                           in no event shall the adjusted annual ground rental for any of the subsequent five
                           (5) year terms of the Operating Period be increased by more than thirty percent (30%)
                           above the annual ground rental for the immediately preceding five (5) year term of
                           the Operating Period.


<PAGE>


                  4.       The adjustments of the annual rental shall be determined by the Authority on the
                           basis of appraisals made by two (2) commercial real estate appraisers who are members
                           of the Master Appraisers Institute.  The Authority shall select one such appraiser
                           and the Lessee shall select the other, with the understanding that the fee due and
                           payable to the appraisers shall be made by the Authority and the Lessee respectively
                           to their selected appraiser.  The Aircraft Maintenance Premises shall be considered
                           as unimproved land for purpose of these appraisals.  Unimproved land shall mean land
                           with adjacent Airport infrastructure improvements, but without any leasehold
                           improvements, structures, or paving.  The appraised value shall be set at the
                           arithmetic average of the two (2) appraisals; PROVIDED, HOWEVER, that in the event
                           that such appraisals differ by more than twenty percent (20%),  the appraisers
                           selected by the Authority and Lessee shall select a third appraiser who shall
                           thereupon complete his appraisal of the Aircraft Maintenance Premises considering
                           such as unimproved land.  In the latter situation, the fair market value of the
                           Aircraft Maintenance Premises shall be computed by selecting the two (2) appraisals
                           which are closest in value, be they the two (2) highest or two (2) lowest appraisals,
                           discarding the third, and thereafter taking the arithmetic average of such appraised
                           values as in the situation where only two (2) appraisals were made.  The fee of the
                           third appraiser shall be borne equally by the Authority and the Lessee.
         B.       Service  Cost  Fee - An  annual  service  fee to  recover  the
                  allocated  costs of  services  provided  to the  Lessee by the
                  Authority  for  each  year of the  Operating  Period.  1.  The
                  service costs for the Airport shall consist of that portion of
                  the Airport's
                           annual  maintenance  and operating  costs for police,
                           fire/crash rescue,  maintenance of roads and grounds,
                           and  maintenance of the access  highway  allocated to
                           the  commercially  leased land areas of the  Airport,
                           other than the passenger


<PAGE>


                           terminals  and  airfield  buildings  and  areas.  See
                           Exhibit  B  for  the   service   cost  fees  for  the
                           commercially leased areas on the Airport for FY 1997.
                  2.       The service costs shall be established by the Authority annually to reflect the
                           latest fiscal year costs experienced by the Authority in providing these services to
                           the commercially leased areas of the Airport.  An Airport service cost per square
                           foot shall be calculated annually by dividing the total service costs experienced by
                           the Authority by the total commercially leased areas of the Airport subject to a
                           service cost fee.  The annual service cost fee for the Lessee shall then be
                           calculated as the product of the land area leased under this Lease and the service
                           cost per square foot for the commercially leased areas of the Airport.


<PAGE>


                  3.       The annual service cost fee shall be prorated on a monthly basis and paid monthly in
                           advance beginning on the first day of each calendar month of the Operating Period and
                           continuing on the first of each month until written notice is received from the
                           Authority establishing the new annual service fee.  The initial annual service fee
                           shall be Sixty-Two Thousand Six Hundred and Fifty-One Dollars ($62,651.00) payable in
                           monthly payments of Five Thousand Two Hundred and Twenty-One Dollars ($5,221)
                           beginning on the first day of the Operating Period.  If the Operating Period becomes
                           effective or terminates on a day other than the first day of the month, service costs
                           shall be prorated on a daily basis for that portion of the first and last month of
                           the Operating Period.
         C.       Percentage and Sublease Rent
                  1.       Lessee shall pay to the Authority percentage rent on the gross receipts received from
                           performing Aircraft Maintenance Services on aircraft of other Airlines and the
                           aircraft of Scheduled Air Carriers serving the Airport from the Aircraft Maintenance
                           Premises, except that percentage rent shall not be due for any Aircraft Maintenance
                           Services performed on behalf of United Airlines or any other code sharing partner,
                           any affiliate or subsidiary thereof or any successor thereto, nor for any affiliate,
                           subsidiary or successor to Lessee.  The percentage rent shall consist of eight
                           percent (8%) of the adjusted gross receipts derived by the Lessee from providing
                           Aircraft Maintenance Services.  Gross receipts shall be adjusted to first deduct the
                           acquisition cost for equipment acquired by the Lessee on behalf of its customer and
                           installed on the aircraft of its customer prior to applying the 8% fee (i.e., total
                           gross receipts received from a customer minus the cost of any equipment acquired on
                           behalf of the customer and included in gross receipts times 8% shall be the
                           percentage rent due the Authority).


<PAGE>


                  2.       The Lessee shall pay to the Authority percentage rent
                           on the gross receipts derived from performing  Ground
                           Support Equipment Maintenance Services related to the
                           maintenance  and repair of ground  support  equipment
                           such    as    vehicles,    tugs,    baggage    carts,
                           special-purpose    vehicles,   and   other   airfield
                           equipment  of other  Airlines.  The  percentage  rent
                           shall  consist  of eight  percent  (8%) of the  gross
                           receipts   received  for  Ground  Support   Equipment
                           Maintenance Services.


<PAGE>


                  3.       Subject to the provisions of Article X herein, the Lessee shall pay sublease rent for
                           approved subleases on the Aircraft Maintenance Premises to parties other than the
                           Lessee or its affiliates.  For the initial five (5) years of the Operating Period,
                           the sublease rent shall be initially established at $2.25 per square foot per year
                           times the amount of approved subleased space on the Aircraft Maintenance Premises
                           times the actual time, on a daily basis, that such sublease is in effect (i.e.,
                           sublease right is only for 3 hours per day, etc.) or eight percent (8%) of the
                           sublease rental paid to Lessee, whichever is the greater amount.  The sublease rent
                           based on percentage shall remain at 8% for the term of this Lease.  The sublease rent
                           based on a dollar rental per square foot shall be adjusted for each five (5) year
                           term of the Operating Period in accordance with the Index now known as the United
                           States Bureau of Labor Statistics, Consumer Price Index, all Urban Consumers,"
                           1982-1984 = 100 Base, All Items, U.S. City Average (hereinafter referred to as the
                           "Index").  Such adjustment shall be calculated by multiplying the sublease rent in
                           effect by the percentage increase in the Index from the Index most recently published
                           prior to the commencement of the five (5) year term of the Operating Period to the
                           Index most recently published prior to the date on which the adjustment becomes
                           effective.  Any resulting positive number shall be added to the applicable sublease
                           rent per square foot to determine the adjusted sublease rent.  In no event shall the
                           increase of the sublease rent be greater than thirty percent (30%) above the sublease
                           rent for the preceding five year term of the Operating Period.



<PAGE>


                           If such Index shall be discontinued with no successor
                           or comparable  successor  Index,  or if a substantial
                           change  is  made  in the  term  or  number  of  items
                           contained  in this Index,  or if the Index  ceases to
                           use 1982-1984 = 100 as the basis for calculation, the
                           Parties  shall  attempt  to agree  upon a  substitute
                           formula,  but if the Parties are unable to agree upon
                           a  substitute  formula,  then  the  matter  shall  be
                           determined  by  arbitration  in  accordance  with the
                           rules of the American  Arbitration  Association  then
                           prevailing.

                           The  percentage  and  sublease  rent for each quarter
                           shall  be due  and  payable  on or  before  the  15th
                           calendar day  following the close of each quarter for
                           the  previous  quarter's  activity.  The Lessee shall
                           submit a statement on or before the 15th calendar day
                           following the close of each quarter,  certified to be
                           true by the  signature of an  authorized  official of
                           the Lessee,  that  details the  Lessee's  total gross
                           receipts and the  calculation  of the  percentage and
                           sublease rent due the Authority. Certified statements
                           shall be required each quarter, regardless of whether
                           the Lessee has any gross receipts to report.


<PAGE>


         D.       Utility Service Payments - The Authority shall furnish to the Lessee all utilities (including,
                  ------------------------
                                                                                                          without
                                                                                                          limitation,
                                                                                                          electricity,
                                                                                                          gas,
                                                                                                          water,
                                                                                                          and
                                                                                                          sanitary
                                                                                                          sewer)
                                                                                                          required
                                                                                                          for
                                                                                                          the
                                                                                                          use
                                                                                                          and
                                                                                                          operation
                                                                                                          of the
                                                                                                          Aircraft
                                                                                                          Maintenance
                                                                                                          Premises
                                                                                                          as
                                                                                                          contemplated
                                                                                                          by
                                                                                                          this
                                                                                                          Lease.
                                                                                                          In
                                                                                                          addition
                                                                                                          to the
                                                                                                          annual
                                                                                                          ground
                                                                                                          rental,
                                                                                                          service
                                                                                                          cost
                                                                                                          fee,
                                                                                                          and
                                                                                                          percentage
                                                                                                          and
                                                                                                          sublease
                                                                                                          rent
                                                                                                          stated
                                                                                                          above,
                                                                                                          the
                                                                                                          Lessee
                                                                                                          shall
                                                                                                          pay
                                                                                                          the
                                                                                                          Authority
                                                                                                          as
                                                                                                          additional
                                                                                                          rent
                                                                                                          an
                                                                                                          amount
                                                                                                          necessary
                                                                                                          to pay
                                                                                                          for
                                                                                                          all
                                                                                                          utilities
                                                                                                          (electricity,
                                                                                                          gas,
                                                                                                          water,
                                                                                                          and
                                                                                                          sanitary
                                                                                                          sewage)
                                                                                                          furnished
                                                                                                          by the
                                                                                                          Authority
                                                                                                          to the
                                                                                                          Aircraft
                                                                                                          Maintenance
                                                                                                          Premises.
                                                                                                          Charges
                                                                                                          for
                                                                                                          utilities
                                                                                                          consumed
                                                                                                          by the
                                                                                                          Lessee
                                                                                                          shall
                                                                                                          be
                                                                                                          reasonably
                                                                                                          established
                                                                                                          by the
                                                                                                          Authority
                                                                                                          and be
                                                                                                          consistent
                                                                                                          with
                                                                                                          like
                                                                                                          charges
                                                                                                          assessed
                                                                                                          other
                                                                                                          users
                                                                                                          of the
                                                                                                          utilities
                                                                                                          on the
                                                                                                          Airport.

                  Utility  costs for the  Airport  consist  of system  costs and
                  invoice  costs.  System  costs  are  those  derived  from  the
                  maintenance and operation of the utility  distribution  system
                  and  invoice  costs  are the  Authority's  cost  of  acquiring
                  utilities from the utility  providers.  The system and invoice
                  costs are combined and divided by the previous  year's utility
                  consumption  to derive the utility rate for each utility.  The
                  utility rates are applied to Lessee's  metered  consumption to
                  derive the utility charges due the Authority.

                  Payment  for  utilities  shall  be made by the  Lessee  within
                  thirty  (30)  calendar  days from  receipt  of  billing by the
                  Authority.  The  utility  rates  may be  changed  periodically
                  during the term of this Lease.  The Authority agrees to notify
                  the Lessee in writing of changes in utility rates prior to the
                  effective date of such changes.


<PAGE>




         E.       Project Rental - With respect to the financing of the Aircraft Maintenance Premises, the Lessee
                  --------------
                  shall also pay Project Rental (i)  in the amount of the principal and interest on the bonds
                  ("Bonds") or the portion of the purchase price corresponding thereto, to be issued by the
                  Industrial Development Authority of Loudoun County, Virginia ("the IDA") or (ii)  if the Bonds are
                  secured by a letter of credit or similar credit enhancement (the "Credit Facility") that will be
                  drawn upon to pay principal and interest and the purchase price of the Bonds, in an amount equal
                  to the amount necessary to reimburse the issuer of the Credit Facility (the "Credit Facility
                  Provider"), or any guarantor of such obligations of the Lessee (the "Guarantor"), for draws under
                  the Credit Facility to pay principal and interest and the purchase price of the Bonds.  A pro rata
                  portion of the Project Rental that corresponds to the principal of the Bonds, or the portion of a
                  drawing under the Credit Facility that corresponds to principal on the Bonds, shall be allocable
                  to, and shall accrue in, for tax purposes, each year of the Operating Period during which Project
                  Rental is paid.  Such Project Rental shall be payable in the amounts and at the times necessary to
                  make all payments due to the IDA and the Credit Facility Provider and the Guarantor.  The
                  Authority hereby assigns the Project Rental to the IDA and the Credit Facility Provider and the
                  Guarantor and the Lessee is hereby directed to pay such Project Rental to or at the direction of
                  the IDA; provided, however, that as long as the Credit Facility remains outstanding or any amounts
                  are owed the Credit Facility Provider or the Guarantor (and the Credit Facility Provider has not
                  failed to pay a drawing in strict compliance therewith) the Lessee is directed to pay such amount
                  to, or as directed by, the Credit Facility Provider and Guarantor.  Except for the above
                  direction, the Authority shall not have any liability for the payment of any principal of,
                  interest on, or other costs due on the Bonds or amounts due the Credit Facility Provider or
                  Guarantor.  Notwithstanding any other provision contained herein to the contrary, any requirement
                  for the payment of Project Rental shall terminate upon the repayment in full of the Bonds, or
                  other satisfaction of the indebtedness thereunder, including, without limitation, pursuant to any
                  foreclosure or other remedial action by or on behalf of the holders of such Bonds; provided that
                  such obligation shall not terminate without the written consent of the Guarantor and the Credit
                  Facility Provider unless the Credit Facility has terminated and all amounts owed to the Guarantor
                  and the Credit Facility Provider have been paid in full.
         F.       Priority of Payment
                  1.       After  the  payment  of  those  costs  necessary  for
                           maintaining  and operating  the Aircraft  Maintenance
                           Premises in accordance with Article IX hereof, Lessee
                           shall  pay the  rental  fees  and  other  charges  in
                           accordance  with  this  Article  IV in the  following
                           order or priority:
                                    First       -    Utility Service Payments
                                    Second  -        Project Rental
                                    Third      -     Annual Ground Rental and Service Cost Fee
                                    Fourth    -      Percentage and Sublease Rent


<PAGE>


                  2.       In the event that  insufficient  funds are  available
                           during any  quarter to pay all of the rental fees and
                           other charges  required under this Article IV, Lessee
                           shall  provide  the  Authority,  within  thirty  (30)
                           calendar days  following the close of the quarter,  a
                           detailed  statement  of cash  flow  for the  previous
                           month setting forth in detail all income and expenses
                           for the prior quarter, the allocation of the funds in
                           accordance  with the priority set forth  herein,  and
                           the amount accrued and due the  Authority,  including
                           any late charges.
                  3.       The Authority may, at its option,  exercise its right
                           to claim the annual performance  guarantee,  provided
                           for under Article XVI herein,  should the Lessee fail
                           to pay utility  payments and/or rental fees and other
                           charges due the  Authority  and that are greater than
                           thirty  (30)  calendar  days  past  due.  The  annual
                           renewal  of  the   performance   guarantee  shall  be
                           considered as a cost  necessary  for the  maintenance
                           and operation of the Aircraft Maintenance Premises as
                           outlined in paragraph F.1. above.
                  4.       The priority of payments set forth in this  Paragraph
                           F.  shall  apply  only  during  the  period  that the
                           initial  financing  is in  place,  as the same may be
                           modified or amended (with  Authority  approval)  from
                           time to time.


<PAGE>


         G.       All  remittances due the Authority by the terms and conditions
                  of this  Lease  shall  be made  payable  to the  "Metropolitan
                  Washington  Airports Authority" and forwarded to: Metropolitan
                  Washington  Airports  Authority,  P.O.  Box 2143,  Merrifield,
                  Virginia  22116-2143.  The certified  statements shall also be
                  forwarded to the above address.  Each payment submitted to the
                  Authority  shall  include  a  statement  that  identifies  the
                  specific  type of payment  being  made  (i.e.,  ground  rental
                  payment,  service cost fee,  percentage  and sublease rent, or
                  utility payment),  the period of time the payment covers,  and
                  the number of this Lease.

                      ARTICLE V - ESTABLISHMENT OF FACILITY


<PAGE>


         The Lessee agrees to design,  construct,  finance,  operate,  maintain,
repair,  restore,  renovate,  and replace, an aircraft  maintenance facility and
related  improvements  comprising the Aircraft Maintenance Premises on behalf of
the  Authority,  but  not  as  the  agent,  representative,  or  partner  of the
Authority,  which  will  reasonably  conform  with the scope and  quality of the
aircraft  maintenance  facility and related improvements as described herein and
presented by the Lessee to the  Authority.  The  Lessee's  total  investment  in
Aircraft  Maintenance  Premises is  estimated  to be  approximately  Ten Million
Dollars  ($10,000,000.00).  The Authority shall construct a taxiway connector to
connect the airfield (Taxiway W-2) with the Aircraft Maintenance  Premises.  The
Lessee  agrees  that  the  taxiway  connector  is to be used in  common  by such
lessee(s)  and aircraft  operators  authorized by the  Authority.  The Authority
shall cut and remove  the trees  from the  Aircraft  Maintenance  Premises.  The
Aircraft   Maintenance   Premises  may  undergo   design   changes   during  the
pre-development and development periods, and, to the extent such changes are not
within the scope of the work as described  herein,  they shall be subject to the
separate  written  approval of the Authority,  as provided for under Article VII
herein.  The  Lessee's  obligations  shall  include,  but not be  limited to the
following:
         A.       The  construction of an aircraft  maintenance  hangar building
                  with approximately 65,000 square feet of gross interior hangar
                  space and approximately  25,000 square feet of office,  shops,
                  and warehouse storage space.
         B.       The construction of a concrete aircraft parking apron adjacent
                  to the aircraft  maintenance  hangar of  approximately  48,600
                  square feet in size.
         C.       The construction of suitable open equipment  storage areas and
                  an   automobile   parking   area   adjacent  to  the  aircraft
                  maintenance  hangar  for the  employees,  customers,  tenants,
                  contractors, service personnel, and invitees of the Lessee.
         D.       The  construction  of on-site  concrete  curbing and  gutters,
                  on-site concrete  sidewalks,  the connection of gutters to the
                  Airport storm drainage  system,  exterior  lighting,  security
                  fencing  and  gates,  and   landscaping,   all  as  considered
                  necessary  for  the   development  and  use  of  the  Aircraft
                  Maintenance Premises.


<PAGE>


         E.       Connection to the dual electrical  feeder system located along
                  the North  Service  Road at an  existing  manhole  in order to
                  ensure a continuous supply of power in the event of failure of
                  the  existing  feeder or in the event the feeder  must be shut
                  down for maintenance or repairs.
         F.       The  landscaping  of the  approximately  forty  (40) foot wide
                  setback between the eastern border of the Aircraft Maintenance
                  Premises  and the  western  edge of  North  Service  Road,  in
                  accordance with the Authority's Design Manual.
         G.       A  fire   suppression   system  to   comply   with  fire  code
                  requirements for the maintenance activity conducted within the
                  hangar.
         H.       The  installation  of a Best lock keying system on all primary
                  building  entrances and mechanical  room entrances for police,
                  security, fire protection, and maintenance access.
         I.       The plans and specifications applicable to the construction of
                  the  aircraft  maintenance  facility  must show the  following
                  items and shall be subject  to the  specific  approval  of the
                  Authority,  which will not be unreasonably withheld,  prior to
                  commencement  of any  work:  1. The  design  and  construction
                  detail of the mass and facade of the aircraft maintenance
                           hangar   building,   including  the  roof,   exterior
                           lighting,   windows,   the   foundation,   the  steel
                           structure, and exterior finish material. A listing of
                           the  specifications  and capacity of the  electrical,
                           plumbing,  water, sewage, heating,  ventilating,  and
                           air conditioning systems.


<PAGE>


                  2.       The pavement section details and specifications for the concrete aircraft parking apron.
                  3.       The pavement section details and specifications of the automobile parking area and the
                           access roadway connection to the Airport roadway system.
                  4.       Architectural and landscaping plans and the exterior sign plans.
                  5.       A storm water management plan, including runoff calculations.
                  6.       The fire suppression system design and specifications for the hangar.
         J.       The latest edition of the following codes and regulations shall apply to the construction of the
                  aircraft maintenance facility:
                  1.       The 1987 Uniform Building Code of Virginia which shall have priority in the event of a
                           conflict with any other applicable code.
                  2.       1987 Building Officials and Code Administration:
                           (a)      Basic Building Code
                           (b)      Basic Mechanical Code
                           (c)      Basic Plumbing Code
                  3.       National Electrical Code.
                  4.       National Fire Protection Association's National Fire Codes.
                  5.       Uniform Federal Accessibility  Standards as published
                           in the Federal Register on August 7, 1984.
                  6.  Applicable  Federal  Aviation  Administration  Regulations
(FAR) and Advisory Circulars (AC).


<PAGE>


                  7.       Metropolitan Washington Airports O&I No. 6-3-1B, Construction and Alterations to
                           Buildings.
                  To the extent of any inconsistency between the above codes and
                  regulations  and the plans and  specifications  as approved by
                  the  Authority,   the  approved  plans  (and  any  waivers  or
                  modifications  contained  in  the  plans,  as  approved)  will
                  control.

                             ARTICLE VI - SCHEDULE FOR SUBMITTING PLANS AND SPECIFICATIONS
         The Lessee shall obtain the Authority's  written approval,  which shall
not be  unreasonably  withheld,  of final  plans  and  specifications,  prior to
commencement  of construction  work on the Aircraft  Maintenance  Premises.  The
Lessee agrees to diligently pursue the design and construction of the facility.
         A.       The Lessee has submitted preliminary plans and specifications for the facility that are acceptable
                  to the Authority.
         B.       Lessee intends to submit major design  components for approval
                  in phases.  Such  components may include,  but are not limited
                  to, the  pre-engineered  building,  site work and  mechanical,
                  electrical  and plumbing  systems.  Review of any of the plans
                  for any major  design  component  submitted  to the  Authority
                  shall  be  completed  and  approved  or   disapproved  by  the
                  Authority   within  45   calendar   days.   Any   revision  or
                  resubmission of disapproved plans


<PAGE>


                  or components  shall be made within 30 days, and the Authority
                  shall  have  14 days  to  review  such  resubmitted  plans  or
                  components.  Each  plan or  component,  when  approved,  shall
                  entitle  Lessee to proceed  with  ordering the  materials  and
                  parts and  commencing  that portion of the work.  Lessee shall
                  submit final plans and  specifications for the entire facility
                  to the  Airport  Manager  for  approval  within 120 days after
                  execution of this Lease.
         C.       Subject to the ability of Lessee to obtain necessary permits and other governmental approvals and
                  subject to other circumstances beyond Lessee's reasonable control, the Lessee agrees to commence
                  construction of the aircraft maintenance facility and to totally erect and have the facility ready
                  for occupancy within fifteen (15) months after the date of commencement of the construction;
                  PROVIDED, that the total elapsed time from the commencement of the Lease Term to completion and
                  occupancy of the facility shall be no more than two (2) years unless the construction is
                  temporarily stopped, interrupted, or otherwise handicapped or prevented for reasons beyond the
                  control and without the fault or negligence of the Lessee including, but not limited to, acts of
                  God, fire, floods, windstorms, or tornadoes.  In such a case, the applicable period of time
                  required to complete construction shall be suspended for such time as may be deemed reasonable by
                  the Authority.


<PAGE>


         D.       The construction work to be performed by or for the Lessee shall be accomplished in substantial
                  accordance with plans and specifications approved by the Authority and shall be subject to the
                  Authority's inspection and approval, both during the work and after its completion.  The Authority
                  will not unreasonably delay or interfere with Lessee's construction schedule, and to that end, the
                  Authority and its inspectors will coordinate its inspection activities with the Lessee and its
                  construction manager and/or contractor.  Whenever possible, the Authority will conduct its
                  inspections at the same time as the architect's inspection of the construction progress so that
                  any issues that may arise can be handled jointly.  The Lessee shall redo or replace, at its own
                  expense, any work not in substantial accordance with plans and specifications approved by the
                  Authority.

            ARTICLE VII - TITLE TO THE FACILITY, FIXED IMPROVEMENTS,
                                    AND OPERATING FACILITIES



<PAGE>


         A.       Title to the aircraft maintenance facility and all fixed improvements on the Aircraft Maintenance
                  Premises constructed by the Lessee under this Lease, and to any and all subsequent alterations,
                  modifications, and enlargements completed during the term of this Lease, as approved by the
                  Authority, shall, subject to the requirements of the Bonds, vest in the Authority as they are
                  constructed.  The Lessee shall have the contractual obligation to construct the improvements, in
                  accordance with the plans and specifications approved by the Authority, to a quality level which
                  is commercially reasonable, conforms to industry standards for such facilities and therefore is
                  acceptable to the Authority and shall make such corrections to the work as the Authority
                  reasonably requests.
         B.       The Lessee  shall have no right  during the term of this Lease
                  to demolish, in whole or in part, any building,  structure, or
                  fixed  improvement  constructed under the terms and conditions
                  of this Lease except with the written consent of the Authority
                  and  any  leasehold  mortgagee(s)  with  an  interest  in  the
                  building,  structure,  or fixed  improvement to be demolished,
                  which may at the discretion of the Authority be conditioned on
                  the  obligation  of  the  Lessee  to  replace  the  same  by a
                  building,  structure,  or fixed improvement  acceptable to the
                  Authority.
         C.       The Lessee and its subtenants shall have the right to lease, encumber, or own and use such trade
                  equipment, furniture, operating facilities, and trade fixtures directly related to the operation
                  at the aircraft maintenance facility, and other trade personalty as may be deemed desirable in the
                  use of the aircraft maintenance facility.  The Lessee and any subtenant or secured party, to the
                  extent of their respective interests in such personalty, shall have the right at any time to
                  remove or replace any and all thereof; PROVIDED, that any damage caused to real property by such
                  removal or replacement shall be repaired to the satisfaction of the Authority by and at the
                  expense of the Lessee.


<PAGE>



                  ARTICLE VIII - CERTIFIED COST OF CONSTRUCTION
         A.       Certified Statement
                  The  Lessee  shall,   within  180  calendar   days   following
                  commencement  of the  Operating  Period,  submit  a  certified
                  statement for the total cost of  construction  of the aircraft
                  maintenance facility and all fixed improvements constructed on
                  the  Aircraft   Maintenance  Premises  to  the  Authority  for
                  approval and in sufficient itemized detail to clearly identify
                  the  actual  sums  expended.  The  certified  statement  shall
                  identify which costs of the aircraft maintenance facility have
                  been paid from proceeds of the Bonds.
         B.       Allowable Costs of Construction to Determine Certified Costs
                  Allowable  costs of  construction  to determine  the certified
                  costs  reported  under  paragraph  A. above shall  include all
                  costs, fees, and expenses paid,  incurred or to be incurred by
                  the Lessee on behalf of the  Authority,  but not as the agent,
                  representative,  or partner of the  Authority,  in  connection
                  with the design,  development,  financing, and construction of
                  the aircraft maintenance  facility.  The costs of construction
                  shall specifically include:


<PAGE>


                  1.       Amounts  paid for all  construction,  equipment,  and
                           material costs for the aircraft  maintenance facility
                           including  the hangar,  offices,  shops,  and storage
                           warehouse  and all  equipment  attached to and made a
                           permanent part of the facility,  the aircraft parking
                           apron, and all other fixed  improvements  made on the
                           Aircraft Maintenance Premises.
                  2.       Amounts  paid  by  Lessee  to  connect  the  Aircraft
                           Maintenance  Premises to the Airport  roadway  system
                           and to extend  utility  lines  servicing the Aircraft
                           Maintenance  Premises to the Authority-owned  utility
                           service lines.
                  3.       Amounts  paid   architects,   engineers,   attorneys,
                           accountants,  consultants, and others for the design,
                           development,   financing,  and  construction  of  the
                           aircraft maintenance facility.
                  4.       Premiums  paid for all  insurance  and payment  bonds
                           required during the construction period; and
                  5.       All costs,  fees,  and expenses,  excluding  Lessee's
                           overhead,  incurred in  obtaining  and  settling  for
                           construction money financing and permanent financing,
                           as well as the interest carry applicable thereto.


<PAGE>


         C.       Neither the Lessee nor any successor in interest to the Lessee under this Lease may claim, for
                  income tax purposes, depreciation or investment credit with respect to the aircraft
                  maintenance facility or any part thereof, and the Parties acknowledge that the Authority will
                  be the owner of the entire aircraft maintenance facility and the Aircraft Maintenance
                  Premises.  An election under Section 142(b)(1)(B) of the Internal Revenue Code of 1986, as
                  amended, shall be made at the time of execution of this Lease and a copy of the election shall
                  be delivered to the Authority and the IDA.  The Authority and the Lessee shall retain copies
                  of the election in their respective records for the Operating Period.  The Lessee shall cause
                  the IDA to retain copies of the election in its records for the Operating Period.  Any
                  publicly recorded document recorded in lieu of this Lease will state in effect that neither
                  Atlantic Coast Airlines (the "Lessee") nor any successor in interest to the Lessee under this
                  Lease, between the Authority and the Lessee may claim, for income tax purposes, depreciation
                  or investment credit with respect to the aircraft maintenance facility, or any part thereof.

                           ARTICLE IX - MAINTENANCE OF THE AIRCRAFT MAINTENANCE PREMISES
         A.       The Lessee, at its sole cost and expense, shall be responsible
                  to the  Authority  throughout  the term of this  Lease for the
                  maintenance of the aircraft maintenance facility and all fixed
                  improvements  located on the  Aircraft  Maintenance  Premises,
                  except to the extent of any damage caused by the Authority, or
                  its agents,  employees,  contractors,  and  licensees,  and in
                  particular:


<PAGE>


                  1.       Lessee shall perform, on a continuous basis, all general and structural maintenance
                           upon the aircraft maintenance hangar building and all other improvements constructed
                           on the Aircraft Maintenance Premises, including exterior and interior building
                           structure, installed and operating equipment, landscaping of the Aircraft Maintenance
                           Premises and the frontage on North Service Road described in Article V.F., pavement,
                           exterior and interior lighting, fencing, and connections to the Authority-owned
                           utility service lines and to the Authority roadway.  In addition, the Lessee shall
                           perform, on a continuous basis, complete recurring maintenance services, including
                           all necessary snow removal services, janitorial and custodial services, trash removal
                           services, and any and all other related services necessary to maintain the Aircraft
                           Maintenance Premises in good condition and appearance, normal wear and tear
                           excepted.  All such maintenance shall be subject to the general monitoring by the
                           Authority to ensure a continued high quality of appearance and structural condition.


<PAGE>


                  2.       Lessee  shall,  subject to the  provisions of Article
                           XIV herein,  take timely  action to repair,  replace,
                           rebuild,  and  paint  all or any  part  of the  fixed
                           improvements    constructed    upon   the    Aircraft
                           Maintenance  Premises which may be worn,  damaged, or
                           destroyed.  All repairs or  replacements  made by the
                           Lessee  shall be of  materials,  specifications,  and
                           workmanship   at   least   equal   to  the   original
                           improvement, equipment, or material.
                  3.       Lessee shall take such care as would be reasonably prudent with respect to all fixed
                           improvements constructed upon the Aircraft Maintenance Premises, including, but not
                           limited to:  the building exteriors and interiors, the operating mechanism of
                           windows, screens,  roofs, foundations, steelwork, columns, doors, partitions, floors,
                           ceilings, inside and outside paved and unpaved areas, the aircraft parking apron,
                           pavement markings, glass of every kind, fences, landscaping, and the utility,
                           mechanical, electrical, and other systems so that at the expiration of this Lease,
                           the foregoing shall be in good condition, except for reasonable wear and tear which
                           does not materially adversely affect the efficient or proper use of any part of the
                           premises or the improvements thereon.
                  4.       Lessee shall provide complete,  proper,  and adequate
                           sanitary handling and disposal,  off the Airport,  of
                           all  trash,  garbage,  and other  refuse  caused as a
                           result  of the  operation  and  use  of the  aircraft
                           maintenance  facility  and provide  suitable  covered
                           receptacles for all trash,  garbage, and other refuse
                           on the Aircraft Maintenance Premises.


<PAGE>


                  5.       Lessee shall comply with the Authority's storm water detention requirements as well
                           as any and all Federal and state regulations addressing storm water and ensure,
                           through proper controls, that the Authority's sewerage and drainage control systems
                           are protected from contamination from toxic or hazardous waste products abandoned or
                           disposed of on the Aircraft Maintenance Premises by the Lessee or its tenants.
                           Lessee shall perform routine maintenance service on the storm water detention pond
                           located adjacent to but outside of the Aircraft Maintenance Premises until such time
                           as it may be relocated by the Authority or another party under contract to the
                           Authority.  Such routine maintenance service shall include the periodic cleaning and
                           cutting of vegetation to permit the continued operation of the storm water detention
                           pond.

                           Contractors   authorized  by  the   Authority   under
                           contract  to provide  fueling,  defueling,  handling,
                           and/or  servicing of aircraft on the Airport shall be
                           liable  to  the   Authority   for  the   containment,
                           handling, and cleanup, if necessary,  of any toxic or
                           hazardous   waste   brought   on  to   the   Aircraft
                           Maintenance Premises.  The Lessee shall not be liable
                           to the  Authority  for the  actions of the  Authority
                           contractors on the Aircraft Maintenance Premises.


<PAGE>


                  6.       Lessee shall not materially alter, modify, remove, or
                           improve the Aircraft Maintenance Premises without the
                           prior  written  approval  of  the  Authority,   which
                           approval shall not be unreasonably  withheld.  In the
                           event that an alteration,  modification,  removal, or
                           improvement  is required  to be made to the  Aircraft
                           Maintenance  Premises in order to conform  with state
                           or Federal  regulations,  the Lessee  shall make such
                           alteration,  modification, removal, or improvement at
                           its sole expense.
         B.       The Authority  shall provide all  maintenance  service for the
                  taxiway connector to the Aircraft  Maintenance  Premises.  The
                  Lessee  shall  maintain  and repair all utility  service  line
                  extensions  and  connections  to the  Authority-owned  utility
                  service  lines,  and  the  roadway   connecting  the  Aircraft
                  Maintenance Premises to the Authority's roadway system.

                         ARTICLE X - LEASEHOLD MORTGAGES


<PAGE>


         A.       The Lessee shall have the unrestricted right, from time to time, to encumber, hypothecate, or
                  mortgage its interest in this Lease and the leasehold estate created hereby under one or more
                  "Leasehold Mortgage(s)" (as hereinafter defined) to a "Leasehold Mortgagee" (as hereinafter
                  defined) without the prior consent of the Authority upon the condition, however, that all
                  rights acquired under a Leasehold Mortgage shall be subject to all the covenants, conditions,
                  and restrictions set forth in this Lease that the Lessee is required to observe, pay, and
                  perform.  The right of the Lessee to grant a Leasehold Mortgage without having to obtain the
                  consent of the Authority shall also include the refinancing of such Leasehold Mortgage and all
                  renewals, modifications, consolidations, replacements, and extensions thereof upon the
                  condition, however, that all rights acquired under such Leasehold Mortgage shall be subject to
                  the covenants, conditions, and restrictions set forth in this Lease that the Lessee is
                  required to observe, pay, and perform.  In the event a Leasehold Mortgagee or any other party
                  succeeding to the rights of the Lessee under this Lease, whether through foreclosure,
                  acceptance of an assignment or deed in lieu of foreclosure, or any possession, surrender,
                  assignment, judicial action, or any other action taken by or on behalf of a Leasehold
                  Mortgagee, the Authority agrees that this Lease shall not terminate as a result of such
                  transfer, surrender, assignment, judicial or other action and the Authority shall recognize
                  such Leasehold Mortgagee or such other party as the Lessee under this Lease in accordance with
                  the terms and provisions hereof.  As used herein, the term "Leasehold Mortgagee" shall mean:
                  (i)  any life insurance company, trust company, bank, national banking association, federal or
                  state savings and loan association, state licensed branch or agency office of a foreign bank,
                  pension plan, real estate investment trust (as defined in Section 856 of the Internal Revenue
                  Code


<PAGE>


                  of 1986 as  amended),  or other  institutional  lender  or any
                  subsidiary  or  affiliate of any of the  foregoing,  including
                  specifically, without limitation, the Credit Facility Provider
                  and its  subsidiaries  and  affiliates  who are  institutional
                  lenders, or (ii) any  noninstitutional  lender approved by the
                  Authority  which holds a Leasehold  Mortgage.  As used herein,
                  the term "Leasehold Mortgage" shall mean any mortgage, deed of
                  trust, or any other real property security instrument by which
                  the Lessee may encumber,  hypothecate, or mortgage all or part
                  of the  Lessee's  interest in this Lease and in the  leasehold
                  estate created hereby.
         B.       Should the Lessee give a Leasehold  Mortgage  encumbering  its
                  leasehold estate to a Leasehold Mortgagee,  and if there shall
                  be  delivered  to  the  Authority  a  conformed   original  or
                  certified copy of the recorded Leasehold  Mortgage  containing
                  the name and address of the Leasehold Mortgagee,  it is agreed
                  by and between the Authority and the Lessee as follows:


<PAGE>


                  (1)      The   Authority   agrees  to  provide  the  Leasehold
                           Mortgagee  with a copy of any  notice of  default  or
                           similar   kind   of   notice   served   upon   Lessee
                           simultaneously  with the giving of such notice to the
                           Lessee. No default or event of default or termination
                           of this Lease or of the Lessee's  right to possession
                           of the Aircraft Maintenance Premises or any reletting
                           of the Aircraft Maintenance Premises by the Authority
                           predicated  on the giving of any notice to the Lessee
                           shall be complete unless like notice in writing shall
                           have  been  given  to  the  Leasehold  Mortgagee  and
                           Leasehold Mortgagee has been given the cure period as
                           provided  in   subsection   B(2)   below.   Upon  the
                           expiration  of any  applicable  cure  period  for the
                           Lessee,  the  Authority  will  notify  the  Leasehold
                           Mortgagee  of the  Lessee's  failure to  effectuate a
                           cure within said cure period.
                  (2)      In the event of any  default by the Lessee  under any
                           of  the  provisions  of  this  Lease,  the  Leasehold
                           Mortgagee  will  have a period  to cure  the  default
                           beginning  on the same day as the cure  period  given
                           Lessee for remedying such default or causing it to be
                           remedied, plus, in each case, the Leasehold Mortgagee
                           will have an  additional  period of thirty  (30) days
                           after the  expiration  of the  Lessee's  cure  period
                           (such  additional  period  being  herein  called  the
                           "Extended Grace Period").


<PAGE>


                  (3)      In the event  the  Lessee  defaults  under any of the
                           provisions of this Lease,  regardless of whether such
                           default  consists  of a  failure  to  pay  rent  or a
                           failure  to do any other  thing  which the  Lessee is
                           required to do hereunder,  the  Leasehold  Mortgagee,
                           without  prejudice  to any of its rights  against the
                           Lessee, shall have the right (but not the obligation)
                           to  make  good  such  default  hereunder  within  the
                           Extended Grace Period, and the Authority shall accept
                           such   performance  on  the  part  of  the  Leasehold
                           Mortgagee  as though the same had been  performed  by
                           the Lessee;  and for such purpose,  the Authority and
                           the Lessee hereby  authorize the Leasehold  Mortgagee
                           to  enter   upon  the   Airport   and  the   Aircraft
                           Maintenance  Premises  and  to  exercise  any  of the
                           Lessee's rights and powers under this Lease.


<PAGE>




                  (4)      The term  "Incurable  Default" as used herein means a
                           default  which  cannot  be  reasonably   cured  by  a
                           Leasehold  Mortgagee  such as, by way of  example,  a
                           default  arising  out  of the  causes  set  forth  in
                           Article XII,  A.3.,  4., 5., and 6. hereof.  The term
                           "Curable Default," as used herein,  means any default
                           which is not an  Incurable  Default.  In the event of
                           any  Curable  Default by the Lessee  under any of the
                           provisions of this Lease and prior to the  expiration
                           of the Extended Grace Period, the Leasehold Mortgagee
                           may, at its option,  (a) give the  Authority  written
                           notice  that it  intends to  undertake  the curing of
                           such  Curable  Default or cause the same to be cured,
                           or to exercise  its rights to acquire the interest of
                           the Lessee in this Lease by foreclosure or otherwise,
                           and (b) tender  payment of all rental  fees and other
                           charges (except Project Rental) then due and owing to
                           the Authority prior to the expiration of the Extended
                           Grace Period.  In the event the  Leasehold  Mortgagee
                           does not give such notice to the Authority and tender
                           such  payments to the  Authority,  the  Authority may
                           proceed to  exercise  the  remedies  available  to it
                           under   Article  XII,  B.  of  this  Lease,   subject
                           nevertheless  to the  provisions of  subsection  B(5)
                           below.   Upon  the  giving  of  such  notice  by  the
                           Leasehold Mortgagee, the Authority will not terminate
                           or take any action to  effectuate  a  termination  of
                           this Lease nor reenter,  take possession or relet the
                           Aircraft  Maintenance  Premises or otherwise  enforce
                           performance  of  this  Lease  for so  long as (a) the
                           Leasehold  Mortgagee is with reasonable due diligence
                           and in good faith  engaged in effecting a foreclosure
                           of the  Leasehold  Mortgage  or the  curing  of  such
                           Curable  Default  and (b) all  rental  fees and other
                           charges  (with the  exception of Project  Rental) due
                           and owing to the  Authority  are paid;  provided that
                           the  Leasehold  Mortgagee  shall not be  required  to
                           continue such  foreclosure  proceedings or cause such
                           rental  fees and other  charges to be paid after such
                           Curable  Default is cured. In the event the nature of
                           any such Curable  Default is such that the  Leasehold
                           Mortgagee  must  take   possession  of  the  Aircraft
                           Maintenance  Premises  in order to cure such  Curable
                           Default, or there is an official  restraint,  such as
                           judicial order or administrative  order applicable to
                           the   Leasehold    Mortgagee,    including    without
                           limitation,  an  automatic  stay,  the running of all
                           applicable cure periods (including the Extended Grace
                           Period)  shall be tolled  so long as rental  fees and
                           other charges (with the exception of Project  Rental)
                           due  and  owing  the   Authority  are  paid  and  the
                           Leasehold  Mortgagee  is  diligently   attempting  to
                           obtain  relief  from  such   judicial   restraint  to
                           exercise its remedies  under the Leasehold  Mortgage.
                           Nothing  herein  shall  preclude the  Authority  from
                           terminating this Lease with respect to any additional
                           default which may occur during the  aforesaid  period
                           of  forbearance  which  is not  remedied  within  the
                           period  of  cure,  if  any,  applicable  to any  such
                           additional   default,   except  that  the   Leasehold
                           Mortgagee  shall have the same  rights  specified  in
                           this Section with respect to any additional defaults.


<PAGE>




                  (5)      In the  event of  termination  of this  Lease for any
                           reason, or in the event the Lessee's interest in this
                           Lease  shall  be  sold,   assigned,   or  transferred
                           pursuant  to the  exercise  of any  remedy  under the
                           Leasehold   Mortgage,   or   pursuant   to   judicial
                           proceedings  or an  assignment  or  deed  in  lieu of
                           foreclosure, and in the event that within thirty (30)
                           days  thereafter  the  Leasehold  Mortgagee  (or  its
                           nominee or the  purchaser,  assignee,  or  transferee
                           from the Leasehold Mortgagee or the trustee under the
                           Leasehold  Mortgage)  shall have paid or  arranged to
                           the reasonable  satisfaction of the Authority for the
                           payment of, all rental fees and other  charges  (with
                           the  exception of Project  Rental) which but for such
                           termination would have become so due and payable from
                           the date of such  termination  through  the  sixtieth
                           (60th) day thereafter, and shall have arranged to the
                           reasonable  satisfaction  of the  Authority  for  the
                           curing  of any  Curable  Default  on the  part of the
                           Lessee,  then the Authority,  within thirty (30) days
                           after receiving a written request  therefor given any
                           time  prior  to such  sixtieth  (60th)  day and  upon
                           payment of all  reasonable  expenses  incurred by the
                           Authority in connection  with the  enforcement of its
                           rights   under  this  Lease   (including   reasonable
                           attorneys'  fees),  will  execute  and deliver to the
                           Leasehold   Mortgagee   or  its  nominee  or  to  the
                           purchaser,  assignee, or transferee,  as the case may
                           be, a new lease of the Aircraft Maintenance Premises.
                           Such  new  lease  shall  be for a term  equal  to the
                           remainder  of the term of this  Lease  before  giving
                           effect to such termination,  shall be subject only to
                           encumbrances  and other  matters  existing  as of the
                           date  hereof,   and  shall   contain  the   identical
                           covenants, agreements,  conditions and limitations as
                           this  Lease,   with  the   exception   that  (a)  the
                           provisions  of Article XI, E. of this Lease shall not
                           apply,  (b) the  provisions of Article IV, C.3. shall
                           be modified as set forth in  subsection  B(10) below,
                           and  (c) if the  lessee  under  the  new  lease  is a
                           Leasehold   Mortgagee   or  a   Leasehold   Mortgagee
                           Affiliate  (as  hereinafter  defined),  the new lease
                           shall be subject to the provisions of subsection B(8)
                           below.  Upon the  execution  and delivery of such new
                           lease, the new tenant may take all appropriate  steps
                           as may be  necessary  to remove the  Lessee  from the
                           Aircraft  Maintenance  Premises,  but  the  Authority
                           shall  not be  subjected  to any  liability  for  the
                           payment of any reasonable fees (including  reasonable
                           attorney's  fees),  costs or expenses  in  connection
                           therewith.  The new  lessee  shall pay all such fees,
                           costs and expenses or, on demand,  make reimbursement
                           therefor to the Authority.


<PAGE>




                  (6)      No surrender  (except a surrender upon the expiration
                           of the term of this Lease or upon  termination by the
                           Authority  pursuant and subject to the  provisions of
                           this  Lease) by the Lessee to the  Authority  of this
                           Lease,  or  any  part  thereof,  or  of  any  of  the
                           improvements thereon, or of any interest therein, and
                           no  termination  or  rejection  of this  Lease by the
                           Lessee shall be valid or effective  without the prior
                           written consent of the Leasehold Mortgagee, which may
                           be withheld in the Leasehold Mortgagee's absolute and
                           sole discretion.  The Authority agrees that,  without
                           the prior written consent of the Leasehold Mortgagee,
                           which will not be unreasonably  withheld, it will not
                           enter into any amendment, modification, or alteration
                           of this Lease with the Lessee which is either (a) not
                           contemplated  by or  provided  for in this  Lease (it
                           being  agreed  that  amendments  to  change  a notice
                           address or to reflect the new Annual Ground Rental as
                           recalculated  and set  pursuant  to  Article IV every
                           fifth  year   during  the  term  of  this  Lease  are
                           contemplated  by or  provided  for in this  Lease and
                           therefore permitted without the prior written consent
                           of  the   Leasehold   Mortgagee)  or  (b)  which  may
                           materially   and   adversely   affect  the  Leasehold
                           Mortgagee's  interest in this Lease (it being  agreed
                           that  amendments  to  change  this  Article  X, or to
                           change the term of this Lease,  or to  introduce  new
                           categories  of rental fees and other  charges due the
                           Authority  and  not  contemplated  by this  Lease  or
                           required by  Federal,  State,  or local  laws,  or to
                           change   the  use   provisions   of  this  Lease  may
                           materially   and   adversely   affect  the  Leasehold
                           Mortgagee  and  therefore  require the prior  written
                           consent of the Leasehold Mortgagee). Furthermore, any
                           cancellation,  surrender, amendment, modification, or
                           alteration  of this  Lease  requiring  the  Leasehold
                           Mortgagee's  prior  consent,  but  made  without  the
                           Leasehold Mortgagee's prior written consent, shall be
                           null and void  and of no force or  effect.  Provided,
                           however,  the Leasehold  Mortgagee shall give written
                           notice to the Authority within thirty (30) days after
                           receiving a proposed amendment ("Proposed Amendment")
                           to this Lease from the  Authority  of its decision to
                           grant  or  withhold   its  consent  to  the  Proposed
                           Amendment.  If the Leasehold  Mortgagee withholds its
                           consent  to the  Proposed  Amendment,  it shall  also
                           specify  in  such  notice  its  reasons  therefor  in
                           detail.  If the  Leasehold  Mortgagee  does  not give
                           notice of the granting or  withholding of its consent
                           to the Proposed Amendment within such thirty (30) day
                           period,  then the Leasehold Mortgagee shall be deemed
                           to have  granted its consent  and the  Authority  and
                           Lessee may execute such amendment to this Lease.

                           In  the  event  the  Authority   disagrees  with  the
                           Leasehold   Mortgagee's   decision  to  withhold  its
                           consent to the  Proposed  Amendment on the basis that
                           such consent was unreasonably withheld (hereinafter a
                           "Dispute"),  the Authority  may elect,  within thirty
                           (30)  days  after  its   receipt  of  the   Leasehold
                           Mortgagee's  denial  of the  Proposed  Amendment,  to
                           submit the  Dispute to the same  binding  arbitration
                           procedure  afforded  the  Leasehold  Mortgagee  under
                           subsections B(8)(b)(iii), (iv), (v), (vi), (vii), and
                           (viii) of this Article X.
                  (7)      The Authority  hereby  consents to the inclusion of a
                           provision   in  the   Leasehold   Mortgage   for  the
                           assignment  of rents from  subleases  of the Aircraft
                           Maintenance Premises to the Leasehold


<PAGE>


                           Mortgagee, effective upon any default under the Leasehold Mortgage.
                  (8)      (a)      If the Lessee is in default under a Leasehold Mortgage, this Lease may be
                                    assigned  (i) to a Leasehold  Mortgagee  (or
                                    any  subsidiary  or affiliate of a Leasehold
                                    Mortgagee  or of  the  parent  company  of a
                                    Leasehold  Mortgage  ("Leasehold   Mortgagee
                                    Affiliate")  by a deed or assignment in lieu
                                    of  foreclosure  of a Leasehold  Mortgage or
                                    (ii)  to  a   Leasehold   Mortgagee,   or  a
                                    Leasehold Mortgagee Affiliate,  in each case
                                    without  the consent of the  Authority,  but
                                    otherwise   subject  to  all  of  the  other
                                    covenants,  conditions, and restrictions set
                                    forth in this Lease. In addition, this Lease
                                    may be assigned (i) by a Leasehold Mortgagee
                                    or  a  Leasehold  Mortgagee  Affiliate  to a
                                    third   party   assignee   or  (ii)  to  any
                                    purchaser  pursuant to a foreclosure sale or
                                    sale  pursuant  to  power  of  sale  under a
                                    Leasehold   Mortgage  (such  assignee  under
                                    clause  (i) or (ii)  being  herein  called a
                                    "Proposed Assignee"),  in each case with the
                                    prior  written  consent  of  the  Authority,
                                    which  consent  shall  not  be  unreasonably
                                    withheld,  but  otherwise  subject to all of
                                    the   other   covenants,   conditions,   and
                                    restrictions set forth in this Lease.


<PAGE>


                                    (b)     (i)      With regard to a proposed assignment ("Proposed
                                                     Assignment") of this Lease by a Leasehold Mortgagee or
                                                     Leasehold Mortgagee Affiliate to a Proposed Assignee, such
                                                     Leasehold Mortgagee or Leasehold Mortgagee Affiliate shall
                                                     provide or cause to be provided to the Authority, in
                                                     writing by registered or certified mail:
                                                     (A)      the name and address of the Proposed Assignee;
                                                     (B)      a detailed description of the Proposed Assignee's
                                                              business and the specific business it will conduct
                                                              on the Aircraft Maintenance Premises; and
                                                     (C)      such reasonable financial information required by
                                                              the  Authority  so
                                                              that the Authority
                                                              can  evaluate  the
                                                              Proposed  Assignee
                                                              under         this
                                                              subsection B(8).


<PAGE>


                                            (ii)     The Authority shall give written notice to the Leasehold
                                                     Mortgagee and to the Proposed Assignee within thirty (30)
                                                     days after receiving all of the information required in
                                                     subsection B(8)(b)(i) above of its decision whether to
                                                     grant or withhold its consent to the Proposed Assignment.
                                                     If the Authority withholds its consent to the Proposed
                                                     Assignment, it shall also specify in such notice its
                                                     reasons therefor in detail.  If the Authority does not give
                                                     notice of the granting or withholding of its consent to the
                                                     Proposed Assignment within such thirty (30) day period,
                                                     then the Authority shall be deemed to have granted its
                                                     consent to the Proposed Assignment and this Lease may be
                                                     assigned to the Proposed Assignee.


<PAGE>




                                            (iii)    In the event the Leasehold Mortgagee disagrees with the
                                                     Authority's decision to withhold its consent to the
                                                     Proposed Assignment on the basis that such consent was
                                                     unreasonably withheld (hereinafter a "Dispute"), the
                                                     Leasehold Mortgagee may elect, within thirty (30) days
                                                     after its receipt of the Authority's denial of the Proposed
                                                     Assignment to submit the Dispute to binding arbitration as
                                                     provided herein.  Such arbitration shall be initiated by
                                                     either the Authority or the Leasehold Mortgagee within ten
                                                     (10) days after the Leasehold Mortgagee shall have sent
                                                     written notice (an "Arbitration Notice") of a demand to
                                                     arbitrate by registered or certified mail to the Authority
                                                     and to Judicial Arbitration and Mediation Services, Inc.
                                                     ("JAMS").  The dispute shall be determined by binding
                                                     arbitration before a retired judge from the highest court
                                                     of general jurisdiction of the Commonwealth of Virginia
                                                     (the "Arbitrator") under the auspices of JAMS.  The
                                                     Authority and the Leasehold Mortgagee shall, within ten
                                                     (10) days after the initiation of the arbitration, attempt
                                                     to agree on a retired judge from the JAMS panel to serve as
                                                     the Arbitrator.  If they are unable to so agree, JAMS will
                                                     provide a list of three (3) available judges, and each
                                                     party may strike one.  The remaining judge (or if there is
                                                     more than one judge remaining, one of the remaining judges
                                                     as selected by JAMS) will serve as the Arbitrator.  If JAMS
                                                     shall no longer exist or if JAMS fails or refuses to accept
                                                     submission of the Dispute, the Dispute shall be resolved by
                                                     binding arbitration before the American Arbitration
                                                     Association ("AAA") under the AAA's commercial arbitration
                                                     rules then in effect.


<PAGE>


                                            (iv)     The Arbitrator shall schedule a pre-hearing conference to
                                                     resolve procedural matters, arrange, for the exchange of
                                                     information, obtain stipulations, and narrow the issues.
                                                     The parties will submit proposed discoveries and schedules
                                                     to the Arbitrator at the pre-hearing conference.  The scope
                                                     and duration of discovery shall be within the sole
                                                     discretion of the Arbitrator.  The Arbitrator shall have
                                                     the discretion to order a pre-hearing exchange of
                                                     information by the parties, including, without limitation
                                                     production of requested documents, exchange of summaries of
                                                     testimonies of proposed witnesses, and examination by
                                                     depositions of parties and third-party witnesses.  This
                                                     discretion shall be exercised to limit the scope of
                                                     discovery to the amount of discovery which the Arbitrator
                                                     determines to be reasonable under the circumstances.
                                            (v)      The  Arbitration  shall  be
                                                     conducted     in    Loudoun
                                                     County, Virginia. Any party
                                                     may   be   represented   by
                                                     counsel or other authorized
                                                     representative. The parties
                                                     may offer such  evidence as
                                                     is relevant and material to
                                                     the Dispute. The Arbitrator
                                                     shall   be  the   judge  of
                                                     relevance and materiality.
                                            (vi)     In  rendering  a  decision,
                                                     the    Arbitrator     shall
                                                     determine  the  rights  and
                                                     obligations  of the parties
                                                     according       to      the
                                                     substantive  and procedural
                                                     laws of the Commonwealth of
                                                     Virginia  and the terms and
                                                     provisions of this Lease.


<PAGE>


                                            (vii)    The Arbitrator shall issue the award as soon as reasonably
                                                     possible following the conclusion of the arbitration
                                                     hearing, but in no event, any later than thirty (30) days
                                                     after the conclusion of the arbitration hearing.  The
                                                     Arbitrator's award shall be based on the evidence at the
                                                     hearing, including all logical and reasonable inferences
                                                     therefrom.  The Arbitrator may make any determination
                                                     and/or grant any remedy or relief that is just and
                                                     equitable.  The award must be based on, and accompanied by,
                                                     a written decision explaining the factual and legal basis
                                                     for the award.  The award shall be conclusive and binding,
                                                     and it may thereafter be confirmed as a judgment in any
                                                     court having jurisdiction.
                                            (viii)   The  Arbitrator  may  award
                                                     costs,  including,  without
                                                     limitation,      attorney's
                                                     fees,    and   expert   and
                                                     witness    costs   to   the
                                                     prevailing party, if any is
                                                     determined      by      the
                                                     Arbitrator      in      the
                                                     Arbitrator's    discretion.
                                                     The  Arbitrator's  fees and
                                                     costs  shall be paid by the
                                                     non-prevailing   party   as
                                                     determined      by      the
                                                     Arbitrator  in  his  or her
                                                     discretion.


<PAGE>






                                            (ix)     Commencing on the date that the Arbitration Notice shall
                                                     have been given, and continuing through and including the
                                                     date on which the Arbitrator shall issue the award with
                                                     respect to the Dispute (the "Award Date"), the obligation
                                                     to pay all rental fees and other changes due and owing
                                                     under this Lease for such period shall be suspended (the
                                                     "Suspended Rent").  If the decision of the Arbitrator shall
                                                     be that the Authority shall not have unreasonably withheld
                                                     its consent to the Proposed Assignment, then the Leasehold
                                                     Mortgagee shall pay the Suspended Rent to the Authority
                                                     within ten (10) days after the Award Date, together with
                                                     interest at the rate of eight percent (8%) per annum from
                                                     and after the date each portion of the Suspended Rent would
                                                     have otherwise been due and payable under this Lease.  In
                                                     the event the Arbitrator's award shall determine that the
                                                     Authority unreasonably withheld its consent to the Proposed
                                                     Assignment, then (A)  this Lease may be assigned to the
                                                     Proposed Assignee that was the subject of the Dispute and
                                                     (B)  no rental fees or other charges shall be due or owing
                                                     under the Lease for the period commencing on the date the
                                                     Arbitration Notice shall have been given and continuing
                                                     through and including (1)  the date on which the Proposed
                                                     Assignee that was the subject of the Dispute shall become
                                                     the Lessee under this Lease pursuant to an assignment
                                                     hereof or 30 days after the date of the Arbitrator's award,
                                                     whichever comes first, or (2)  if this Lease is not
                                                     assigned because the Authority unreasonably withheld its
                                                     consent to the Proposed Assignment to such Proposed
                                                     Assignee and through no fault of the Leasehold Mortgagee or
                                                     the Leasehold Mortgagee Affiliate, the date on which this
                                                     Lease is assigned with the consent of the Authority to a
                                                     subsequent Proposed Assignee.  All rental fees and other
                                                     charges payable hereunder shall once again commence to
                                                     accrue from and after the effective date of such assignment
                                                     (whether to the Proposed Assignee that was the subject of
                                                     the Dispute or a subsequent Proposed Assignee).
                                            (x)      Unless the Authority and a Leasehold Mortgagee otherwise
                                                     agree in writing, the Authority and a Leasehold Mortgagee
                                                     shall have no right to resolve a Dispute in a manner which
                                                     is contrary to the provisions of this subsection B(8)(b).
                                                     The parties shall at all times conduct themselves in
                                                     accordance with the terms of this subsection B(8)(b), and
                                                     all attempts to circumvent the terms of this subsection
                                                     B(8)(b) shall be absolutely null and void and of no force
                                                     or effect whatsoever.


<PAGE>




                                    (c)     The ultimate assignee of this Lease shall assume the Lessee's
                                            obligations under this Lease, including, without limitation, the
                                            payment of all rental fees and other charges (with the exception of
                                            Project Rental) as they become due, and an executed counterpart of
                                            such assumption shall be delivered to the Authority.  If the
                                            Leasehold Mortgagee (or a Leasehold Mortgagee Affiliate) shall be
                                            the assignee of this Lease, its liability under such assumption
                                            agreement shall be limited to the period of ownership of this
                                            Lease, provided that the party to whom this Lease is assigned by
                                            the Leasehold Mortgagee (or a Leasehold Mortgagee Affiliate) shall
                                            deliver to the Authority at the time of such assignment a like
                                            assumption agreement, but without limitation as to duration of
                                            liability.  Furthermore, the Authority expressly agrees that it
                                            shall look solely to the estate and property of a Leasehold
                                            Mortgagee (or a Leasehold Mortgagee Affiliate) created under this
                                            Lease for the collection or enforcement of any judgment (or other
                                            judicial process), requiring the payment of money or the
                                            performance of any obligation by a Leasehold Mortgagee (or such
                                            Leasehold Mortgagee Affiliate) as the lessee of the Aircraft
                                            Maintenance Premises in the event of any default or breach by a
                                            Leasehold Mortgagee (or such Leasehold Mortgagee Affiliate) as the
                                            lessee of the Aircraft Maintenance Premises with respect to any of
                                            the terms and provisions of this Lease to be observed or performed
                                            by it; and no other assets of the Leasehold Mortgagee (or a
                                            Leasehold Mortgagee Affiliate) shall be subject to levy, execution,
                                            or other judicial process for the satisfaction of the Authority's
                                            claim.
                  (9)      Notwithstanding  anything  contained in this Lease to
                           the  contrary,  during  such  period  of  time  as  a
                           Leasehold   Mortgagee   (or  a  Leasehold   Mortgagee
                           Affiliate)  shall be the Lessee under this Lease, the
                           Leasehold   Mortgagee   (or  a  Leasehold   Mortgagee
                           Affiliate)  shall not be required to operate and keep
                           open  for   business  any  portion  of  the  Aircraft
                           Maintenance  Premises,  provided  that the  Leasehold
                           Mortgagee (or the Leasehold  Mortgagee  Affiliate) is
                           using  reasonable  efforts  in  cooperation  with the
                           Authority to find a replacement lessee to operate the
                           Aircraft Maintenance Premises.


<PAGE>


                  (10)     Notwithstanding  anything  contained in this Lease to
                           the  contrary,  upon and after the  foreclosure  of a
                           Leasehold Mortgage or the conveyance or assignment of
                           this Lease and the leasehold estate created hereby to
                           the  Leasehold   Mortgagee  or  Leasehold   Mortgagee
                           Affiliate in lieu of foreclosure:  (a) the provisions
                           of  Article  XI,  E.,  appearing  on  page 66 of this
                           Lease,  which  limits  the  total  space  within  the
                           aircraft  maintenance  hangar  which  shall  be under
                           sublease at any one time,  shall  terminate and be of
                           no further force or effect, and (b) the provisions of
                           Article   IV.C.3.   pertaining   to  the  payment  of
                           percentage  and sublease rent shall apply only if any
                           lessee,   sublessee,  or  occupant  of  the  Aircraft
                           Maintenance Premises or any part thereof is providing
                           aircraft  maintenance  services  to third  parties or
                           subleasing space to third parties and not for its own
                           account.  Any airline  utilizing  all or a portion of
                           the Aircraft Maintenance Premises for the maintenance
                           and  servicing  of its own fleet  shall not be liable
                           for  percentage  and sublease  rent under this Lease.
                           Any  firm  providing  maintenance  services  to third
                           parties,   including   warranty  work   performed  by
                           manufacturers,  shall be subject to and liable to pay
                           percentage  rent and  sublease  rent if it  subleases
                           space to third  parties in  accordance  with  Article
                           IV.C.3.


<PAGE>


                  (11)     There  shall be no merger of the  Lessee's  leasehold
                           estate with the leasehold estate or fee estate in the
                           land upon which the Aircraft  Maintenance Premises is
                           located  by  reason  of the fact  that  the  Lessee's
                           leasehold  estate may be held  directly or indirectly
                           by or for the  account  of any  person who shall also
                           hold directly or indirectly  the greater  estate,  or
                           any interest in such greater estate,  nor shall there
                           by any such  merger by reason of the fact that all or
                           any  part of the  Lessee's  leasehold  estate  may be
                           conveyed or  mortgaged to a Leasehold  Mortgagee  who
                           shall also hold directly or  indirectly  such greater
                           estate,  or any part thereof,  in the land upon which
                           the Aircraft  Maintenance Premises are located or any
                           interest of the Authority under this Lease.
                  (12)     The provisions of Article X, Sections A and B are for
                           the  benefit  of,  and are to be  enforceable  by,  a
                           Leasehold Mortgagee.
                  (13)     In the event  that  there is more than one  Leasehold
                           Mortgage  encumbering  the leasehold  estate  created
                           hereby,  the most senior  Leasehold  Mortgagee  shall
                           have priority in terms of exercising  the rights of a
                           Leasehold  Mortgagee  pursuant to the  provisions  of
                           this Section.


<PAGE>


                  (14)     The   Authority   and  the  Lessee  hereby  agree  to
                           cooperate  in  including  in this Lease,  by suitable
                           amendment from time to time, any provision  which may
                           reasonably  be requested  by any  proposed  Leasehold
                           Mortgagee  for  the  purpose  of   implementing   the
                           Leasehold Mortgagee  protection  provisions contained
                           in this Lease and allowing such  Leasehold  Mortgagee
                           reasonable  means to protect and to preserve the lien
                           of the  Leasehold  Mortgage on the  occurrence  of an
                           event of default under this Lease.  The Authority and
                           the Lessee each agrees to execute and deliver (and to
                           acknowledge,  if necessary,  for recording  purposes)
                           any  agreement   necessary  to  effectuate  any  such
                           amendments;  provided,  however,  any such amendment,
                           shall not in any way affect  the term or rental  fees
                           and other  charges due the  Authority or grant to the
                           Lessee rights  prohibited  ("Prohibited  Uses") under
                           this Lease,  nor  otherwise in any  material  respect
                           adversely  affect any rights of the  Authority  under
                           this Lease,  or the rights  heretofore  granted other
                           lessees on the Airport by the Authority.

                     ARTICLE XI - ASSIGNMENT AND SUBLETTING


<PAGE>


         A.       Assignment and Sublease by Lessee.  Except as otherwise provided in this Lease, Lessee
                  ---------------------------------
                  covenants that it shall not assign, transfer, convey, sell, mortgage, pledge or encumber
                  (hereinafter collectively referred to as an "assignment") or sublet the Aircraft Maintenance
                  Premises or any part thereof, or any rights of the Lessee hereunder or allow the use of the
                  Aircraft Maintenance Premises by any other person without the prior written consent of the
                  Authority.  Such consent shall not be unreasonably withheld.  Provided, however, that without
                  such consent Lessee may assign its rights under this Lease to any corporation with which
                  Lessee may merge or consolidate or to any corporation with which there is common ownership.
                  Consent by the Authority to any type of transfer described in this Article or elsewhere in
                  this Lease shall not in any way be construed to relieve Lessee from obtaining further
                  authorization from the Authority for any subsequent transfer of any nature whatsoever.  If
                  Lessee fails to obtain prior written approval of any such assignment or sublease, the
                  Authority shall have the right to refuse to recognize the assignment or sublease and the
                  assignee or sublessee shall acquire no interest in this Lease or any rights to use the
                  Aircraft Maintenance Premises;
         B.       Notwithstanding any assignment, sublease or any other transfer
                  of the Aircraft  Maintenance Premises or any rights under this
                  Lease,  Lessee shall remain fully and primarily liable for the
                  payment of all rental fees and other charges due hereunder and
                  fully  responsible  for the  performance  of all of its  other
                  obligations  hereunder until expressly  released in writing by
                  the Authority, subject to the provisions of Article X herein.


<PAGE>


         C.       Lessee,  when  requesting  an  approval  of an  assignment  or
                  sublease  agreement under Paragraph A., shall include with its
                  request a copy of the proposed  agreement,  if prepared,  or a
                  detailed  summary of the material  terms and  conditions to be
                  contained  in  such  agreement.   Any  proposed  agreement  or
                  detailed   summary   thereof   shall   provide  the  following
                  information:
                  1.       The Premises to be assigned, sublet or used;
                  2.       The terms;
                  3.       If a sublease, the rentals and fees to be charged;
                  4.       If a sublease,  a provision that the subtenant  shall
                           use its  subleased  premises  for only the  permitted
                           usage herein unless  otherwise  authorized in writing
                           by the Authority,  that the term shall not exceed the
                           unexpired  term of this Lease,  and that the sublease
                           shall be subject to and subordinate to this Lease;
                  5.       All  other  material  terms  and  conditions  of  the
                           assignment or sublease  agreement  that the Authority
                           may reasonably require.
         D.       The  Authority  shall  provide  written  notice to the  Lessee
                  within   thirty  (30)   calendar   days  of  its  approval  or
                  disapproval  of  the  proposed  assignment  or  sublease.   If
                  approved,  Lessee shall submit a fully  executed  copy of such
                  agreement to the  Authority  within  thirty (30) days prior to
                  the commencement of the assignment or sublease.
         E.       Notwithstanding the Authority's approval of subleases, no more
                  than  forty-nine  percent  (49%) of the total space within the
                  aircraft maintenance hangar shall be under sublease at any one
                  time, subject to the provisions of Article X herein.


<PAGE>


         F.       If any transfer of Lessee's interest hereunder shall occur, whether or not prohibited by this
                  Article XI, the Authority may elect to collect the rental fees and other charges due pursuant
                  to Article IV hereof from any assignee, sublessee or other transferee of Lessee and in such
                  event shall apply the net amount collected to the rental fees and other charges payable by
                  Lessee hereunder, PROVIDED, HOWEVER, such action by the Authority shall not release Lessee
                  from this Lease or any of its obligations hereunder.  If any transfer of interest prohibited
                  by this Article XI shall occur without authorization of the Authority and the Authority
                  collects rental fees and other charges from any assignee, sublessee or transferee of Lessee
                  and applies the net amount collected in the manner described in the preceding sentence, such
                  actions by the Authority shall not be deemed to be a waiver of the covenant contained in this
                  Article or constitute acceptance of such assignee, sublessee or other transferee by the
                  Authority.


<PAGE>


         G.       The  Authority  may elect in an assignment or transfer of this
                  Lease to permit the  release of the Lessee from any and all of
                  its  obligations  hereunder and thereafter  look solely to the
                  assignee to perform  all  obligations  of this  Lease.  Such a
                  release  of  the  Lessee  by  the  Authority   shall  only  be
                  considered  if the  Authority is satisfied  with the financial
                  suitability of the assignee, the capability of the assignee to
                  perform all  obligations  of Lessee  under the Lease,  and the
                  absence of conflict with any other rights granted the assignee
                  or other parties on the Airport by the Authority.

                   ARTICLE XII - TERMINATION BY THE AUTHORITY
         A.       The Lessee shall be deemed to be in default hereunder upon the
                happening of any of the following events and subsequent  failure
                of the  Lessee to cure,  or  commence  and  diligently  continue
                thereafter reasonable efforts to cure, the default, condition or
                event within thirty (30)  calendar days after written  notice by
                the Authority to the Lessee and any Leasehold Mortgagee or other
                financing  party  identified  under this Lease:  1. The material
                failure of the Lessee to  perform,  keep,  or observe any of the
                material
                         terms,   requirements,   and  conditions  which  it  is
                         obligated  to  perform,  keep,  or  observe  under this
                         Lease,  including  the payment of rental fees and other
                         charges due the Authority  (excluding  Project  Rental)
                         and the  Lessee's  failure  to  enforce  provisions  of
                         tenant sublease agreements.
                2.       The conduct by the Lessee of business activities on the
                         Aircraft  Maintenance  Premises not  authorized by this
                         Lease or approved in writing by the Authority.
                3.       The  occurrence  of any act by the  Lessee  or  persons
                         acting through the Lessee which operates to deprive the
                         Lessee   permanently   of  the  rights,   powers,   and
                         privileges  necessary  for the  proper  conduct  of its
                         rights and obligations under this Lease.


<PAGE>


                  4.       The abandonment of the Aircraft  Maintenance Premises
                           by  the   Lessee  or   Lessee's   failure  to  pursue
                           completion  of  the  aircraft   maintenance  facility
                           within  the time  requirements  set forth in  Article
                           VI.C.
                  5.       Any event of insolvency of the Lessee, including, but
                           not  limited  to, an  assignment  for the  benefit of
                           creditors,  or the filing of a bankruptcy petition by
                           Lessee.
                  6.  Termination  by the Authority of the Lessee's  Airport Use
         Agreement  and  Premises  Lease.  B. If the Lessee is in default  under
         paragraph A. above, subject to the applicable provisions under
                  Article X, the Authority may exercise any of the following remedies that it, in its sole
                  discretion, shall elect:
                  1.       The Authority may terminate this Lease in its entirety or as to any portion of the
                           rights and premises covered hereby.  Upon termination
                           hereunder  in  its  entirety  by the  Authority,  all
                           rights,  powers,  and  privileges of the Lessee under
                           this  Lease  shall   cease,   and  the  Lessee  shall
                           immediately  vacate any and all space  occupied by it
                           under this Lease. A partial termination,  if elected,
                           shall be reasonably limited to the part of this Lease
                           affected by the default.
                  2.       If the  Lease  is  terminated  under  paragraph  A.4.
                           above,  Lessee shall, at the option of the Authority,
                           and at Lessee's  expense,  demolish and remove any or
                           all   improvements   on  the   Aircraft   Maintenance
                           Premises,  including the aircraft  maintenance hangar
                           building and other related improvements.


<PAGE>


                  3.       Upon  termination  as  provided  in  paragraph  B. 1.
                           above,  the Authority may by use of reasonable  means
                           reenter   and  take   possession   of  the   Aircraft
                           Maintenance Premises occupied by the Lessee, by legal
                           process,  and  expel,  oust,  and  remove any and all
                           parties who occupy any portion of the premises on the
                           Airport covered by this Lease,  and any and all other
                           parties  that may be  found  in or upon the  Aircraft
                           Maintenance Premises.
                  4.       The Authority may, contemporaneously with termination
                           hereunder,   designate   a   replacement   lessee  to
                           purchase,  and the Lessee shall sell,  its  leasehold
                           interest in the  Aircraft  Maintenance  Premises at a
                           cash price (the  "Leasehold  Purchase  Price") not to
                           exceed the  amount  outstanding  under any  Leasehold
                           Mortgages.


<PAGE>


                  The portion of the Leasehold  Purchase Price  attributable  to
                  costs that have been financed out of the proceeds of the Bonds
                  shall  be  paid  to or at the  direction  of the  IDA.  If the
                  Aircraft Maintenance Premises will be leased to another entity
                  that  assumes  the  Lessee's  obligation  to  pay  the  amount
                  outstanding  on  the  Bonds,  the  Leasehold   Purchase  Price
                  attributable  to costs  that  have  been  financed  out of the
                  proceeds of the Bonds shall be zero. If the Authority does not
                  initially  designate  a  replacement  lessee to  purchase  the
                  Lessee's interest,  the Lessee shall have the right,  provided
                  that the  Lessee  maintains  in good  condition  the  Aircraft
                  Maintenance  Premises for such  period,  within six (6) months
                  thereafter  to sell or  otherwise  transfer  its interest to a
                  third party ("Buyer") acceptable to the Authority on terms and
                  conditions  which  require  that the Buyer  assume  all of the
                  obligations of the Lessee under this Lease,  commencing on the
                  date of transfer of the  Lessee's  interest to the Buyer.  The
                  Authority's   approval  of  the  Buyer,  which  shall  not  be
                  unreasonably  withheld,  shall be  conditioned  on the  Lessee
                  first meeting all payment  obligations to the Authority  under
                  the terms of the  Lease  from the date of  termination  to the
                  date of transfer of the Lessee's interest to the Buyer. In the
                  event the Lessee is unable to sell or  otherwise  transfer its
                  interest within such period,  the Authority shall use its best
                  efforts to find a purchaser  and the Lessee shall be obligated
                  to  sell  its  interest  to any  purchaser  identified  by the
                  Authority at the Leasehold Purchase Price.
         C.       Any action or  forbearance  of action  taken by the  Authority
                  hereunder  shall  not be  deemed a  waiver  of any  claim  for
                  damages that the  Authority may have against the Lessee or the
                  Lessee's  assignees.  The Authority  shall also be entitled to
                  maintain  an action at law or in equity  against the Lessee or
                  Lessee's assignees for damages, specific performance, or other
                  remedies available under applicable law.

                    ARTICLE XIII - TERMINATION BY THE LESSEE
         This Lease shall be subject to  termination,  in its  entirety,  by the
Lessee,  upon the happening of any one or more of the  following  events and the
subsequent  failure of the Authority to remove or correct the  condition  within
the sixty (60) calendar days after written notice to the Authority:


<PAGE>


         A.       Any  act on the  part  of the  Authority,  the  lessor  of the
                  Authority,  or any party  claiming by,  through,  or under the
                  Authority,   which  prevents  or  substantially  and  directly
                  restricts the use of the Aircraft  Maintenance  Premises for a
                  period of at least 120 consecutive days.
         B.       Any acts of God, civil commotion,  acts of the military power,
                  damage to runways,  or other  similar  causes which operate to
                  prevent or  substantially  restrain  use of the  Airport for a
                  period of at least 120 consecutive days.

         In no event  shall the Lessee  terminate  this Lease  without the prior
written consent of the leasehold  mortgagee for so long as a leasehold  mortgage
remains outstanding with respect to the Aircraft  Maintenance  Premises.  In the
event this Lease is terminated for reasons set forth in this Article, the Lessee
shall have the same rights with respect to buyout of its  leasehold  interest in
the Aircraft  Maintenance Premises granted in Article XII herein, and shall also
be entitled to maintain an action at law or in equity  against the Authority for
damages, specific performance, or other remedies available under applicable law.

                   ARTICLE XIV - DESTRUCTION AND IMPROVEMENTS


<PAGE>


         A.       In the event that the Aircraft Maintenance Premises is damaged or destroyed, in whole or in part,
                  by fire, explosion, acts of God, or any other cause, the Lessee agrees, with due diligence, to
                  restore, repair, and rehabilitate any and all damage to the Aircraft Maintenance Premises as
                  nearly as possible to the value and character of the facilities existing immediately prior to
                  such damage or destruction.  If the Aircraft Maintenance Premises is not tenantable or usable by
                  the Lessee for fifty percent (50%) or more of the building space within the Aircraft Maintenance
                  Premises, the term of this Lease shall be extended for the time required to repair or restore the
                  Aircraft Maintenance Premises to a condition existing prior to the occurrence of the damage.  The
                  time of extension, if any, shall be computed from the date of destruction, fire, or damage to the
                  date that a certificate of occupancy is issued certifying that the damage involved has been
                  repaired and the facilities are ready for the use by the Lessee; PROVIDED, HOWEVER, any such
                  extension of the term of this Lease to repair damaged facilities on the Aircraft Maintenance
                  Premises shall not extend beyond June 6, 2037.  If all or a portion of the Aircraft Maintenance
                  Premises is not tenantable during a period of restoration, the Authority shall make an equitable
                  adjustment to the ground rental and service cost fee due the Authority in proportion to the
                  percentage of the building space within the Aircraft Maintenance Premises that remains fit for
                  occupancy or use.


<PAGE>


         B.       The Lessee shall have the right to cancel and terminate this Lease during the last five (5) years
                  of the Operating Period, if the Aircraft Maintenance Premises is damaged or destroyed by fire,
                  explosion, acts of God, or any other cause beyond the control of the Lessee, to an extent in
                  excess of fifty percent (50%) as determined by an independent adjuster, of the then fully
                  insurable replacement value thereof, or to a lesser extent should the Parties hereto agree that
                  continued use and operation of the Aircraft Maintenance Premises is not feasible.  In the event
                  this Lease is canceled or terminated as provided for under this paragraph B., the Lessee shall
                  pay all fees and other charges due the Authority, as provided for under Article IV herein, to the
                  date of cancellation or termination of this Lease and shall cause the distribution of insurance
                  proceeds in the following order:  (i) first, to pay amounts outstanding for any Bonds and/or
                  leasehold mortgages, (ii) second, to remove debris and restore the grounds on the Aircraft
                  Maintenance Premises, (iii) third, to pay, in cash, the Authority an amount equal to the
                  Authority's interest in the replacement value of the Aircraft Maintenance Premises, and (iv) the
                  balance, if any, to the Lessee.  The method of determining the Authority's interest in the
                  replacement value of the Aircraft Maintenance Premises shall be calculated as the expired or
                  amortized percentage of the Operating Period on the date the Lease is canceled or terminated
                  times the total amount of replacement insurance proceeds available prior to distribution.  (e.g.,
                  The Lease is canceled or terminated on the first day of the twenty-sixth year of the Operating
                  Period and the replacement insurance proceeds total $15,000,000.  Therefore the amount due the
                  Authority under this example, assuming a thirty (30) year Operating Period, would be
                  .833 x $15,000,000 = $12,500,000 assuming the sum under (i) and (ii) above is $2,500,000 or less).


<PAGE>


         C.       The insurance proceeds from the policies of insurance provided
                  by the  Lessee  shall  be  held  in  trust  by  the  Leasehold
                  Mortgagee  and used  for the  sole  purpose  of  repairing  or
                  replacing  the  damaged  or  destroyed  Aircraft   Maintenance
                  Premises,  or  distributed  as provided in  paragraph B. above
                  should the Lease be canceled or  terminated  and the  Aircraft
                  Maintenance Premises not restored.

                   ARTICLE XV - INSURANCE AND INDEMNIFICATION
         A.       The Lessee shall continuously  provide,  maintain in force and
                  effect,  and pay all  premiums  for  the  following  insurance
                  coverage from an insurance  company(s)  possessing a rating of
                  B+10 or higher  from the A.M.  Best  Company or an  equivalent
                  rating. The Metropolitan  Washington  Airports Authority shall
                  be named as an  additional  insured  on all  policies,  except
                  Worker's   Compensation   and,   if   required,   Professional
                  Liability:  1. Property Insurance for the Aircraft Maintenance
                  Premises


<PAGE>


                           Insurance  against loss or damage to all improvements
                           constructed  on  the  Aircraft  Maintenance  Premises
                           (including  all subsequent  alterations,  rebuilding,
                           replacements,  changes and additions  thereto made by
                           Lessee) by reason of fire,  wind,  smoke,  vandalism,
                           malicious mischief, riot, civil commotion and hazards
                           and risks included with so-called  "extended coverage
                           endorsements" or "all risk." Such policies shall name
                           the Lessee as the insured  and each shall  contain an
                           endorsement   in  favor  of  the  Authority  and  the
                           Lessee's   Leasehold   Mortgagee(s)   as   additional
                           insureds in a form  satisfactory to the Authority and
                           such Leasehold  Mortgagee(s).  The insurance shall be
                           issued in an aggregate amount which shall not be less
                           than the full  replacement  value (exclusive of paved
                           surfaces, excavation,  basements, and foundations) of
                           all improvements  erected on the Aircraft Maintenance
                           Premises. Each insurance policy shall be in such form
                           and  content  as  is  reasonably  acceptable  to  the
                           Authority and to the Lessee's Leasehold Mortgagee(s).
                           Such policies may be in the form of blanket coverage.
                           The policy or policies  of  insurance  shall  provide
                           that all proceeds of such insurance  shall be payable
                           to the Lessee or Leasehold Mortgagee, in trust, to be
                           used for the sole  purpose of  repairing or replacing
                           the damaged or destroyed improvements constructed and
                           installed  on the  Aircraft  Maintenance  Premises or
                           distributed as provided for under Article XIV herein.
                  2.       Commercial General Liability Insurance


<PAGE>


                           Insurance  identifying the Authority as an additional
                           insured,  and protecting the Authority and the Lessee
                           against  public  liability  in an  amount of not less
                           than  Ten  Million  Dollars  ($10,000,000)   combined
                           single   limit   (which   shall   include    umbrella
                           coverages).   Such  policy  or  policies  of  general
                           liability    shall    include     Premises-Operations
                           Liability,  Contractual  Liability,  Personal Injury,
                           and Broad  Form  Property  Damage to cover the entire
                           Aircraft  Maintenance  Premises and all activities of
                           the  Lessee,  its  tenants,  and  all  other  parties
                           authorized  by the  Lessee to use or  operate  on the
                           Aircraft Maintenance Premises.
                  3.       Comprehensive Automobile Liability Insurance
                           Insurance with a combined single limit of Ten Million
                           Dollars  ($10,000,000) for bodily injury and property
                           damage for each accident (including garage liability,
                           all automotive  equipment  owned,  operated,  leased,
                           hired, and non-owned).
                  4.       Worker's Compensation and Employer's Liability Insurance
                           Insurance  required  for the  selected  proponent  to
                           comply  with the laws of the State of  Virginia  with
                           All  States  Endorsement   Employer's   Liability  of
                           $1,000,000 for each accident/disease.
         B.       The insurance  protection  required  under this Lease shall be
                  written with insurance  companies licensed and qualified to do
                  business  in the  State  of  Virginia.  If in the  Authority's
                  opinion the minimum levels of insurance  herein  required have
                  become  inadequate  during the term of this Lease,  the Lessee
                  agrees to increase  such  minimum  levels of  insurance to the
                  reasonable amount requested by the Authority.


<PAGE>


         C.       Each policy or certificate issued by the insurer shall contain
                  an  agreement  by the  insurer  that  the  policy  will not be
                  canceled  without at least  thirty (30) days  advance  written
                  notice of  cancellation  to the  Authority and to the Lessee's
                  Leasehold  Mortgagee(s) and in no event shall such policies be
                  canceled by the Lessee without the  Authority's  prior written
                  consent unless proper replacement policies are then issued and
                  available.
         D.       All insurance  required to be provided and  maintained  may be
                  placed  under  the  Lessee's  so-called  "blanket   policies";
                  PROVIDED,  HOWEVER,  the insurer named in the blanket policies
                  must certify to the  Authority  and to the Lessee's  Leasehold
                  Mortgagee(s)   that  the  coverage   required  is   separately
                  identified  and is  provided  within the terms of the  blanket
                  policy for the Aircraft Maintenance Premises.
         E.       At least  ten (10) days  before  the  expiration  date of each
                  policy of insurance  required by this Lease,  the Lessee shall
                  pay the  premiums  for the  renewal of each of such  policy or
                  policies  and within such period the Lessee  shall  deliver to
                  the  Authority  the  renewal  certificates  of  the  fire  and
                  extended risk endorsement policies,  the general comprehensive
                  general  liability  policies,  and  comprehensive   automobile
                  liability  policies with an endorsement  thereon marked "paid"
                  and/or  a  duplicate  receipt  evidencing   advanced  payment.
                  Certificates  of  insurance  shall  be  sent  to  the  Airport
                  Manager,  Washington Dulles  International  Airport,  P.O. Box
                  17045, Washington, DC 20041.


<PAGE>


         F.       Indemnification.  Except as provided in Article XXIX herein, the Lessee shall assume all risks
                  ---------------
                  incident to, or in connection with, the occupancy and use of the Aircraft Maintenance Premises
                  under this Lease, and Lessee shall be solely responsible for all accidents or injuries to persons
                  or property caused by the occupancy and use of the Aircraft Maintenance Premises. The Lessee shall
                  indemnify, defend, and save harmless the Authority, its authorized officers, employees, agents,
                  and representatives from any and all claims, suits, civil, criminal or administrative proceedings,
                  losses, damages, or attorney fees, of whatsoever kind or nature, arising directly or indirectly
                  out of or incident to the use and occupancy of the Aircraft Maintenance Premises and improvements
                  constructed thereon or resulting from the act or omission of the Lessee, its agents, contractors,
                  subcontractors, tenants, and employees, guests, and contractors of tenants, except to the extent
                  caused by acts or failures to act by the Authority or its agents, employees, contractors, or
                  licensees.
         G.       The  Authority   shall  be  responsible   for  performing  any
                  mitigating  measures  required by law or  regulation,  if any,
                  because of the  existence of possible  wetlands  within and/or
                  adjacent to the Aircraft  Maintenance  Premises and  requiring
                  mitigation   because  of  the  construction  of  the  aircraft
                  maintenance facility.

ARTICLE XVI - PERFORMANCE GUARANTEE AND BONDS


<PAGE>


         The Lessee  shall  furnish to the  Authority  performance  and  payment
bonds.  The bonds,  at the option of the Lessee,  may be in the form of a surety
bond, letter of credit, postal money order, certified cashier's check payable to
the Authority,  or an irrevocable  letter of credit.  The bonds shall be sent to
the Airport Manager,  Washington Dulles International  Airport,  P.O. Box 17045,
Washington,  DC 20041.  These bonds shall be in the amount  indicated  below and
conditioned on the Lessee's performance as follows:
         A.       Performance Guarantee
                  A  performance  guarantee  in  a  penal  sum  of  One  Hundred
                  Seventy-Nine   Thousand  Five  Hundred   Sixty-Three   Dollars
                  ($179,563) conditioned on the full and faithful performance by
                  the Lessee of each and all of the covenants,  agreements,  and
                  understandings  as set forth in this  Lease.  The  performance
                  guarantee  may be an  annual  guarantee  but  must be  renewed
                  annually at least thirty (30)  calendar days in advance of its
                  date of expiration.  The performance guarantee amount shall be
                  adjusted  annually  so that it is in the  amount  equal to one
                  hundred percent (100%) of the annual ground rental and service
                  cost fee and  fifty  percent  (50%) of the  estimated  utility
                  costs  payable  to the  Authority.  This  guarantee  shall  be
                  submitted to the Authority within thirty (30) calendar days of
                  the commencement of the Operating Period.
         B.       Payment Bonds


<PAGE>


                  Payment bonds in the amount of one hundred  percent  (100%) of
                  the  contract  price,  including  the value of materials to be
                  incorporated  in  the  work,  for  the  aircraft   maintenance
                  facility.  The  payment  bonds  shall be incurred by all major
                  trade  subcontractors  and the Lessee  shall  ensure that such
                  payment bonds collectively total one hundred percent (100%) of
                  the contract price of the aircraft maintenance facility. These
                  payment  bonds  are to  assure  payment  to  the  construction
                  contractors supplying labor and materials. The Lessee shall be
                  required  to  promptly  clear  all  liens  filed  against  the
                  aircraft     maintenance     facility,     its    contractors,
                  subcontractors,  material men, and workmen  arising out of the
                  performance of the construction  work, and shall indemnify the
                  Authority against all claims arising out of the performance of
                  all such  construction  work.  These payment bonds shall be in
                  effect until the completion of construction  and the beginning
                  of the Operating Period.

                           ARTICLE XVII - LATE CHARGES
         A.       Without  waiving  any other right of action  available  to the
                  Authority  in the event of late  payment  of  rental  fees and
                  other charges due hereunder, late charges will be assessed for
                  all rental fees and  charges for which  payment is received by
                  the Authority  after the due date. Late charges may consist of
                  interest,  penalties,  and administrative charges as indicated
                  in paragraphs B., C., and D. below.
         B.       The interest  charge for late payment  shall be  calculated as
                  the product of the charges that are late and an interest  rate
                  per annum  which is four  percent  (4%) higher than the "prime
                  rate" as published in The Wall Street  Journal,  commencing on
                  the date that such charges were past due,  provided the Lessee
                  shall have had at least thirty (30) days advance notice of any
                  rental  fee or other  charges  due the  Authority  under  this
                  Lease.


<PAGE>


         C.       The  monthly   penalty  charges  for  late  payment  shall  be
                  calculated  as the  product of the unpaid  portion of accounts
                  more than ninety (90)  calendar  days past due and an interest
                  rate  of  six  percent  (6%)  per  annum  (or  as  established
                  periodically).
         D.       The   administrative   charge   of  $12  (or  as   established
                  periodically)  will be  assessed  for  each  month  for  every
                  account past due more than thirty (30) calendar days.

                  ARTICLE XVIII - AIRPORT RULES AND REGULATIONS
         The Lessee, while exercising the rights granted under this Lease, shall
observe and obey all lawful rules and regulations of the Metropolitan Washington
Airports  Authority not inconsistent  with the rights granted the Lessee by this
Lease and applied in a  nondiscriminatory  manner to other lessees of comparable
Airport property.

                           ARTICLE XIX - COPARTNERSHIP
         It is  mutually  understood  and agreed  that  nothing in this Lease is
intended  or shall be  construed  as in any way  creating  or  establishing  the
relationship of copartners  between the Parties hereto,  or as making the Lessee
an agent or  representative  of the  Authority  for any purpose or in any manner
whatsoever.

                       ARTICLE XX - PARTICIPATION IN LEASE
         The Lessee agrees that no member of the Authority Board of Directors or
employees of the Authority  shall be admitted to any share or part of this Lease
or to any benefit that may arise therefrom.



<PAGE>


                               ARTICLE XXI - TAXES
         Lessee shall comply with all applicable taxation laws, rules,  rulings,
and regulations  imposed by any jurisdiction  with authority to tax the Lessee's
income,  receipts,  sales,  purchases,  property and leasehold interest or other
interests arising from this Lease.  Nothing herein shall be construed to deny or
limit the Lessee's  right to contest in good faith the amount or validity of any
tax or assessment by appropriate means.
                              ARTICLE XXII - SIGNS
         The  Lessee  shall  not,  without  the prior  written  approval  of the
Authority,  not to be unreasonably  withheld,  erect,  maintain,  or display any
advertising,   signs,  posters,  or  similar  devices  at  or  on  the  Aircraft
Maintenance Premises;  PROVIDED, HOWEVER, that on those interior portions of the
aircraft maintenance facility which are not visible from the outside, the Lessee
may install directional and identification  signs necessary for the facility and
all such signs shall be exempt from the prior approval of the Authority.

                         ARTICLE XXIII - QUIET ENJOYMENT
         The Authority agrees that the Lessee and its subtenants shall peaceably
have and enjoy the Aircraft  Maintenance  Premises and all rights and privileges
granted  under this Lease  without  any  interruption  or  disturbance  from the
Authority as long as the Lessee pays all amounts due the  Authority and performs
all other obligations required under this Lease.


<PAGE>



                 ARTICLE XXIV - RIGHT OF INSPECTION OF PREMISES
         The Authority,  its authorized  representatives and agents,  shall have
the  right  to view any and all of the  Aircraft  Maintenance  Premises,  at any
reasonable  time during normal  business  hours for the purpose of inspecting or
performing any other act therein which may be necessary for the proper operation
of the Airport;  PROVIDED,  HOWEVER,  that the Authority  will exercise its best
efforts to not  interfere  with the  Lessee's  use of the  Aircraft  Maintenance
Premises.

                         ARTICLE XXV - SAVING PROVISION
         If any provision of this Lease or the  application  of any provision of
this Lease to any person or circumstance  shall be invalid or  unenforceable  to
any extent,  the remainder of this Lease or the application of such provision to
persons  or   circumstances   other  than  those  to  which  it  is  invalid  or
unenforceable,  shall not be affected  thereby and each  provision of this Lease
shall be valid and be enforced to the fullest extent of the law.

                      ARTICLE XXVI - WAIVER OF PERFORMANCE


<PAGE>


         The failure of either the Authority or the Lessee to insist, in any one
or  more  instances,  upon  a  strict  performance  by the  other  of any of the
provisions,   terms,  covenants,   reservations,   conditions,  or  stipulations
contained  in this Lease,  shall not be  considered  a waiver or  relinquishment
thereof, but the same shall continue and remain in full force and effect, and no
waiver by either Party of any provision, term, covenant, reservation, condition,
or  stipulation  hereunder  shall be deemed  to have  been made in any  instance
unless expressed in writing and agreed to by the Parties hereto.

              ARTICLE XXVII - CERTIFICATION OF THE LESSEE'S STATUS
         The  Authority  agrees to execute and deliver to the Lessee  and/or any
other  person or  entity  designated  by the  Lessee,  from  time to time,  upon
reasonable  written  notice by the  Lessee,  which  notice  shall state that the
Lessee  requires same in  connection  with a financing or other  undertaking,  a
statement in writing:
                  (i)      certifying  that this Lease is unmodified and in full
                           force and  effect  (or if there  have  been  material
                           modifications,  that the  Lease is in full  force and
                           effect as modified);
                  (ii)     stating  whether  the  Lessee  is in  default  in the
                           performance  of any of the  terms,  requirements,  or
                           conditions   contained  in  this  Lease  and  if  so,
                           specifying the nature of such default; and
                  (iii)    addressing such other reasonable matters as Lessee or
                           any lender of Lessee may request.

                            ARTICLE XXVIII - NOTICES
         Notice to the Authority,  Lessee,  and any other parties  designated by
the Lessee  provided for herein shall be sufficient  if sent by certified  mail,
postage prepaid, and


<PAGE>


addressed  to the  addresses  set out below or to such  other  address as may be
designated  by the party  involved to the other  parties in writing from time to
time:

         If to the Authority, as follows:

                  Airport Manager
                  Washington Dulles International Airport
                  P.O. Box 17045
                  Washington, DC   20041

         If to the Lessee, as follows:

                  Atlantic Coast Airlines
                  Corporate Counsel
                  515A Shaw Road
                  Sterling, VA   20164

         With copies to:




If to any  Leasehold  Mortgagee(s),  to such  address as such  mortgagee(s)  may
notify the Authority in writing from time to time.

                      ARTICLE XXIX - ENVIRONMENTAL MATTERS
         A.       Hazardous Substances, Spills, and Releases.


<PAGE>


                  1.       Lessee shall immediately notify the Authority upon becoming aware of:  (1)  any leak,
                           spill, release, discharge, or disposal at a reportable level or a level that could
                           reasonably be expected to pose a threat to human health or the environment
                           (collectively, a "Material Level") of a Hazardous Substance on, under, or adjacent to
                           the Aircraft Maintenance Premises or threat of or reasonable suspicion of any of the
                           same; and/or (2)  any notice or communication from a governmental agency or any other
                           person, directed to Lessee or any other person (of which Lessee has knowledge),
                           relating to such Hazardous Substances thereon, thereunder, or adjacent thereto or any
                           violation of any federal, state, or local Environmental Laws, with respect to the
                           Aircraft Maintenance Premises or activities thereon; and (3) any other event relating
                           to Hazardous Substances or Environmental Laws, which event could reasonably be
                           expected to injure the Aircraft Maintenance Premises, reduce the value of the
                           Aircraft Maintenance Premises, or impair the Lessee's ability to comply with any of
                           its obligations under this Lease.


<PAGE>




                  2.       In the event of a leak, spill, or release at a Material Level of a Hazardous
                           Substances on the Aircraft Maintenance Premises by the Lessee or the threat of or
                           reasonable suspicion of the same, Lessee shall (to the extent that the Lessee or the
                           Authority is so required under applicable law, including Environmental Laws)
                           immediately undertake all emergency response necessary to contain, clean-up, and
                           remove the Hazardous Substance and shall undertake within a reasonable time all
                           investigatory, remedial, and/or removal action necessary or appropriate to ensure
                           that any contamination by the Hazardous Substance is eliminated; provided, however,
                                                                                            --------  -------
                           that the Authority shall choose the waste disposal site and assume complete
                           responsibility for arranging for the disposal of any Hazardous Substance arising from
                           any Authority Environmental Responsibilities.  The Authority shall have the right to
                           approve all investigatory, remedial, and removal procedures and the company(ies)
                           and/or individuals conducting said procedures; provided, however, that in the case of
                                                                          --------  -------
                           an emergency, no such prior approval shall be required.  In all other cases the
                           Authority's approval shall be deemed given three business days after the receipt of
                           the Lessee's proposed investigatory, remedial, or removal procedures.  Within thirty
                           days following completion of such investigatory, remedial, and/or removal action,
                           Lessee shall provide the Authority with a certificate acceptable to the Authority,
                           stating that all such contamination has been eliminated as required by applicable
                           Environmental Laws.  The Lessee shall be responsible for any costs incurred under
                           this Article XXIX, except that the Authority shall be responsible for any costs
                           incurred by the Lessee under this Article, which costs arise from:  (i)  a condition
                           on the Aircraft Maintenance Premises, existing on the date the Lessee took possession
                           thereof, whether or not such condition was uncovered in an environmental audit or
                           assessment and which condition is not caused by the Lessee or its employees,
                           contractors, or agents; or (ii)  any contamination caused by the migration of
                           Hazardous Substances from any other property (not caused by the Lessee or any of its
                           tenants, or their employees or agents); or (iii)  a leak, spill or release of a
                           Hazardous Substance on the Aircraft Maintenance Premises caused by any action or
                           inaction of the Authority, its employees, contractors, or agent (collectively, the
                           "Authority Environmental Responsibilities").
         B.       Environmental Indemnification - Lessee


<PAGE>




                  Lessee  agrees  to  indemnify,  save,  and hold  harmless  the
                  Authority   from  and   against  all   removal,   remediation,
                  containment,  and other costs (whenever  incurred)  caused by,
                  arising out of, or in connection  with the handling,  storage,
                  discharge,    transportation,   or   disposal   of   Hazardous
                  Substances,  which  Hazardous  Substances  are on the Aircraft
                  Maintenance Premises and which handling,  storage,  discharge,
                  transportation  or  disposal  occurs  after  the date of legal
                  possession of the Aircraft  Maintenance Premises by the Lessee
                  and prior to the vacation of the Aircraft Maintenance Premises
                  by the Lessee;  provided,  however,  this indemnity shall also
                  cover any costs (whenever incurred) caused by, arising out of,
                  or in  connection  with,  the  handling,  storage,  discharge,
                  transportation,  or disposal of  Hazardous  Substances,  which
                  Hazardous Substances are on the Aircraft Maintenance Premises,
                  resulting from the acts or omissions of Lessee,  or any of its
                  tenants  thereof,  or  their  employees,   representatives  or
                  agents; provided,  further, this indemnity shall not cover any
                  costs    resulting    from   the    Authority    Environmental
                  Responsibilities.  Costs shall include, but not be limited to:
                  (a) claims of third parties,  including governmental agencies,
                  for damages, response costs, injunctions, or other relief; (b)
                  the cost,  expense, or loss to the Authority of any injunctive
                  relief,  including preliminary or temporary injunctive relief,
                  applicable  to  the  Authority  or  the  Aircraft  Maintenance
                  Premises;  (c)  the  expense,  including  fees  of  attorneys,
                  engineers,  consultants,  paralegals and experts, of reporting
                  to any agency of the State of Virginia or the United States as
                  required by applicable  Environmental  Laws and  responding to
                  the existence of said  Hazardous  Substances;  (d) any and all
                  expenses  or   obligations,   including   fees  of  attorneys'
                  engineers,  consultants, and paralegals,  incurred at, before,
                  and after any trial or appeal therefrom, or any administrative
                  proceeding  or appeal  therefrom  whether  or not  taxable  as
                  costs, including, without limitation, attorneys' and paralegal
                  fees,  witness fees (expert and otherwise),  deposition costs,
                  copying and  telephone  charges,  and other  expenses,  all of
                  which  shall be paid by Lessee  promptly  after the  Authority
                  incurs  the  obligation  to pay such  amounts.  Such  damages,
                  costs,  liabilities,  and expenses shall include those claimed
                  to be owed by any  regulating  and  administering  agency.  As
                  applied to this  Article  the  Aircraft  Maintenance  Premises
                  shall be deemed to include the soil and water table thereof.
         C.       Environmental Indemnification - Authority


<PAGE>


                  The Authority agrees to indemnify, save, and hold harmless the
                  Lessee from and against all removal, remediation, containment,
                  and other  costs  arising  in  connection  with the  Authority
                  Environmental  Responsibilities  caused by, arising out of, or
                  in   connection   with  the  handling,   storage,   discharge,
                  transportation,  or disposal  of  Hazardous  Substances.  Such
                  costs shall include but not be limited to: (a) claims of third
                  parties, including governmental agencies, for damage, response
                  costs, injunctions, or other relief; (b) the cost, expense, or
                  loss to the Lessee of the Aircraft Maintenance  Premises;  (c)
                  the  expense,   including   fees  of   attorneys,   engineers,
                  consultants,  paralegals,  and  experts,  of  reporting to any
                  agency  of the  State of  Virginia  or the  United  States  as
                  required by applicable  Environmental  Laws and  responding to
                  the existence of said  Hazardous  Substances;  (d) any and all
                  expenses  or   obligations,   including   fees  of  attorneys'
                  engineers,  consultants, and paralegals,  incurred at, before,
                  and after any trial or appeal therefrom or any  administrative
                  proceeding  or appeal  therefrom,  whether  or not  taxable as
                  costs, including, without limitation, attorneys' and paralegal
                  fees,  witness fees (expert and otherwise),  deposition costs,
                  copying and  telephone  charges,  and other  expenses,  all of
                  which shall be paid by the Authority promptly after the Lessee
                  incurs  the  obligation  to pay such  amounts.  Such  damages,
                  costs,  liabilities,  and expenses shall include those claimed
                  to be owed by any regulating and administering agency. As used
                  in this Article,  the Aircraft  Maintenance  Premises shall be
                  deemed to include the soil and water table thereof.
         D.       Definitions.  For purposes of this Article XXIX the  following
                  words  and  phrases   shall  have  the   following   meanings:
                  "Environmental  Law" shall mean any Federal,  state,  or local
                  law, rule,  regulation,  code, order,  ordinance,  statute, or
                  decision related to Hazardous Substances.



<PAGE>


                  "Hazardous  Substances" shall mean (i) any substances  defined
                  as  hazardous  materials,   pollutants,   contaminants,  toxic
                  substances or related materials as now or hereinafter  defined
                  in any applicable  Federal,  state, or local law,  regulation,
                  ordinance,  or directive,  including,  but not limited to, the
                  Resource  Conservation  and  Recovery  Act of 1976 (42  U.S.C.
                  Sections  6901  et.  seq.);  the  Comprehensive  Environmental
                  Response,  Compensation  and Liability Act of 1980, as amended
                  by SARA (42 U.S.C.  Section  9601,  et.  seq.);  the Hazardous
                  Materials  Transportation  Act (49 U.S.C.  Section  1801,  et.
                  seq.);  the Toxic  Substances  Control Act (15 U.S.C.  Section
                  2601, et. seq.);  the Resource  Conservation and Recovery Act,
                  as amended (42 U.S.C.  Sections  9601,  et.  seq.);  the Clean
                  Water Act (33 U.S.C.  Section 7412 et. seq.); as any such acts
                  may  be  amended,   modified,  or  supplemented;   (ii)  those
                  substances  listed or otherwise  identified in the regulations
                  adopted and publications issued, as may be amended,  modified,
                  or  supplemented,  pursuant  to any  of  the  above-referenced
                  statutes;  (iii) any friable asbestos,  airborne asbestos,  or
                  any   substance   the   presence  of  which  on  the  Aircraft
                  Maintenance Premises is prohibited by any Environmental Law of
                  any  governmental  authority  or  which  may  give  rise to an
                  assessment  of a  governmental  authority;  and (v) any  other
                  substance which by any  Environmental  Law of any governmental
                  authority   requires   special  handling  in  its  collection,
                  storage, treatment, or disposal.

                       ARTICLE XXX - FEDERAL REQUIREMENTS
         A.       Relationship to Federal Lease
                  This Lease shall be and remain  subordinate  to the provisions
                  of  the  lease  between  the  United   States   Department  of
                  Transportation  and the Authority (the "Federal  Lease").  The
                  Authority agrees to provide Lessee and any Leasehold Mortgagee
                  written  advance notice of any amendments to the Federal Lease
                  that  materially  affect the terms of this Lease.  At any time
                  after execution of this Lease, the United States Department of
                  Transportation,  or its  successor,  shall  have the  right to
                  declare this Lease to be superior to the Federal Lease.


<PAGE>


         B.       Other Government Agreements
                  This Lease shall be and remain  subordinate  to the provisions
                  of any existing or future agreements between the Authority and
                  the United States government or other governmental  authority,
                  relative to the operation or maintenance  of the Airport,  the
                  execution of which has been or will be required as a condition
                  to the granting of federal or other governmental funds for the
                  development of the Airport,  to the extent that the provisions
                  of any  such  existing  or  future  agreements  are  generally
                  required by the Untied States or other governmental  authority
                  of other civil airports  receiving  such funds.  The Authority
                  agrees to use its best efforts to notify  Lessee and Leasehold
                  Mortgagee  of any  provision  of which the  Authority  becomes
                  aware which would materially and adversely modify the material
                  terms of this Lease.
         C.       Federal Government's Emergency Clause
                  All  provisions  of this  Lease  shall be  subordinate  to the
                  rights of the United  States of America to operate the Airport
                  or any portion thereof during time of war or declared national
                  emergency in accordance with  established  lawful  procedures.
                  Such rights shall  supersede  any provision of this Lease that
                  is  inconsistent  with the  operation  of the  Airport  by the
                  United  States  of  America  during a time or war or  national
                  emergency.


<PAGE>


         D.       Nondiscrimination
                  Lessee for itself, its personal representatives, successors in
                  interest,  and assigns,  as part of the consideration  hereof,
                  does hereby agree as a covenant running with the land that (i)
                  no person on the  grounds of race,  color or  national  origin
                  shall be excluded from  participation  in, denied the benefits
                  of, or be otherwise  subjected to discrimination in the use of
                  the Aircraft Maintenance Premises; (ii) in the construction of
                  any improvements  on, over, or under the Aircraft  Maintenance
                  Premises and the furnishing of services thereon,  no person on
                  the  grounds  of  race,  color  or  national  origin  shall be
                  excluded from  participation in, denied the benefits of, or be
                  otherwise subjected to discrimination.
         E.       Airport Certification
                  Lessee shall not operate the Aircraft  Maintenance Premises in
                  a manner that prevents or impairs the  Authority's  ability to
                  be in, and  maintain,  compliance  with FAA  regulation 14 CFR
                  Part 139, "Certification and Operations: Land Airports Serving
                  Certain Air  Carriers," and other  requirements  for obtaining
                  and  maintaining,  an Airport  Operating  Certificate from the
                  FAA.



<PAGE>


         IN WITNESS  WHEREOF,  the Parties hereto have executed this Lease as of
the day and year shown below.

         METROPOLITAN WASHINGTON AIRPORTS AUTHORITY



         By
                  James A. Wilding
                  General Manager and
                  Chief Executive Officer

         Date


         ATLANTIC COAST AIRLINES



         By


         Title


         Date

                             SECRETARY'S CERTIFICATE
         I, , certify that I am the  Secretary of the  corporation  named as the
Lessee herein; that who signed this Lease on behalf of the corporation, was then
of said  corporation;  that said Lease was duly signed for and on behalf of said
corporation  by authority of its  governing  body and is within the scope of its
corporate powers.

                                                                         (Corporate Seal)
                  (Secretary's Signature)



<PAGE>


COMMONWEALTH OF VIRGINIA)
                                     ) ss.:
COUNTY OF LOUDOUN              )

         I,                                                    , a notary public in and for the State and
            ---------------------------------------------------
County aforesaid, do certify that                                                       , whose name, as
                                  ------------------------------------------------------
                                        of                                                       , is signed
to the writing above, bearing date on the           day of                                    , has
acknowledged the same before me in my County aforesaid.

         Given under my hand and official seal this           day of                                    .



                  Notary Public


COMMONWEALTH OF VIRGINIA)
                                     ) ss.:
COUNTY OF LOUDOUN              )

         I,                                            , a notary public in and for the Commonwealth and
County aforesaid, do certify that                                                , whose name, as
                                               , of METROPOLITAN WASHINGTON AIRPORTS AUTHORITY, is signed to
the writing above, bearing date on the        day of
                               , has acknowledged the same before me in my County aforesaid.

         Given under my hand and official seal this           day of                             .

         My term of office expires on the           of                                .





                  Notary Public

</TABLE>

<TABLE>
<S>     <C>    <C>    <C>    <C>    <C>    <C>
                                    SCHEDULE
                                     TO THE
                                MASTER AGREEMENT

                            dated as of July 11, 1997

                                     between

                           BOMBARDIER INC. ("Party A")

                                       and

                       ATLANTIC COAST AIRLINES ("Party B")


I.        PART   TERMINATION PROVISIONS

                           A.        "Specified Entity" means in relation of Party A for the purposes of:

                    Section 5(a)(v) (Default under Specified
                    Transaction):                                  Not applicable

                    Section 5(a)(vi) (Cross Default):              Not applicable

                    Section 5(a)(vii) (Bankruptcy):                Not applicable

                    Section 5(b)(iv) (Credit Event upon Merger):
                                                                   Not applicable

                                           and in relation to Party B for purposes of:

                    Section 5(a)(v) (Default under Specified
                    Transaction):                                  Not applicable

                    Section 5(a)(vi) (Cross Default):              Atlantic Coast Airlines, Inc.

                    Section 5(a)(vii) (Bankruptcy):                Atlantic Coast Airlines, Inc.

                    Section 5(b)(iv) (Credit Event upon Merger):
                                                                   Affiliates

                           A.        "Specified Transaction" will have the meaning specified in Section 14 of this Agreement.

                           A. The "Cross Default" provisions of Section 5(a)(vi)
                  shall apply to Party A, Party B and the Specified  Entities of
                  Party B.

                  "Specified  Indebtedness"  will have the meaning  specified in
                  Section 14 of this  Agreement;  provided  that with respect to
                  Party B only, "Specified  Indebtedness" shall include, without
                  limitation,  the Purchase  Agreement No. RJ-0350 dated January
                  8, 1997 between Party A and Party B and any agreement  entered
                  into between Party A and Party B in connection therewith.

                  "Threshold Amount" means

                           1. with  respect to Party A, an amount equal to three
                           and  one-half  per cent (3 1/2%) of Party  A's  total
                           stockholders'  equity (as specified from time to time
                           in  its  most  recently   audited  annual   financial
                           statements  prepared  in  accordance  with  generally
                           accepted accounting principles), or its equivalent in
                           any other currency; and

                           1.  with  respect  to  Party  B,  the  lesser  of (A)
                           $1,000,000  or (B)  an  amount  equal  to  three  and
                           one-half  per  cent  (3  1/2%)  of  Party  B's  total
                           stockholders'  equity (as specified from time to time
                           in its most  recently  audited  financial  statements
                           prepared  in  accordance   with  generally   accepted
                           accounting principles).

                           A. The  "Credit  Event  Upon  Merger"  provisions  of
Section 5(b)(iv) will only apply to Party B.

                  A.        The "Automatic Early Termination" provisions of Section 6(a) will not apply to either party.

                  A.        Payments on Early Termination.  For the purpose of Section 6(e) of this Agreement:

                                            1.        Market Quotation will apply.
                                            2.        Second Method (Full Two-Way Payment) will apply.

                           A. "Termination Currency" means the currency selected
                  by the non-Defaulting  Party or the non-Affected Party, as the
                  case may be, or in circumstances  where there are two Affected
                  Parties, United States Dollars.

I.        PART   TAX REPRESENTATIONS.

                           A.        Payer Tax Representations.  For purposes of Section 3(e) of this Agreement, Party A and Party B
                  each makes the following representation:

                  It is not required by any  applicable  law, as modified by the
                  practice of any relevant  governmental  revenue authority,  of
                  any Relevant Jurisdiction to make any deduction or withholding
                  for or on  account  of any Tax from any  payment  (other  than
                  interest  under  Section  2(e),   6(d)(ii)  or  6(e)  of  this
                  Agreement)  to be made by it to the  other  party  under  this
                  Agreement.  In making this representation,  it may rely on (i)
                  the  accuracy of any  representations  made by the other party
                  pursuant  to  Section  3(f)  of  this   Agreement,   (ii)  the
                  satisfaction of the agreement  contained in Section 4(a)(i) or
                  4(a)(iii) of this Agreement and the accuracy and effectiveness
                  of any  document  provided  by the  other  party  pursuant  to
                  Section  4(a)(i) or 4(a)(iii) of this  Agreement and (iii) the
                  satisfaction  of the agreement of the other party contained in
                  Section 4(d) of this Agreement,  provided that it shall not be
                  a breach of this  representation  where  reliance is placed on
                  clause  (ii) and the other  party  does not  deliver a form or
                  document  under  Section   4(a)(iii)  by  reason  of  material
                  prejudice to its legal or commercial position.

                           A.        Payee Tax Representations.  For purposes of Section 3(f) of this Agreement, Party A and Party B
                  each make the following representation:

                  It is  fully  eligible  for  the  benefits  of  the  "Business
                  Profits"  provision,  the "Interest"  provision and the "Other
                  Income"  provision of the Specified Treaty with respect to any
                  payment  described  in such  provisions  and received or to be
                  received by it in connection with this Agreement,  and no such
                  payment is attributable  to a trade or business  carried on by
                  it through a permanent  establishment  in the  jurisdiction of
                  the Payer.

                  "Specified  Treaty" means, with respect to a Transaction,  the
                  tax treaty applicable between the United States and Canada.

I.        PART   AGREEMENT TO DELIVER DOCUMENTS

For the  purposes of Sections  4(a)(i) and (iii) of this  Agreement,  each party
agrees to deliver the following documents, as applicable:

                  A.        Tax forms, documents or certificates to be delivered are:

                  Each  party  agrees to  complete,  accurately  and in a manner
                  reasonably  satisfactory  to the other party,  and to execute,
                  arrange for any required  certification of, and deliver to the
                  other party (or to such  governmental  or taxing  authority as
                  the other party reasonably directs), any form or document that
                  may be required or reasonably  requested in order to allow the
                  other party to make a payment under this Agreement without any
                  deduction or withholding  for or on account of any Tax or with
                  such deduction or withholding  for or on account of any Tax or
                  with such  deduction or  withholding  at a reduced  rate,  (i)
                  promptly  upon the  earlier  of (A)  reasonable  demand by the
                  other  party and (B)  learning  that the form or  document  is
                  required and (ii) prior to the expiration or  obsolescence  of
                  any previously delivered form.

                           A.        Other documents to be delivered are:

Party required to deliver    Form / Document /          Date by which to be        Covered by Section 3(d)
document                     Certificate                delivered                  Representation
Party A and Party B          Certified evidence of      Upon execution of this     Yes
                             the authority,             Agreement and, in
                             incumbency and specimen    connection with each
                             signature of each          Confirmation, promptly
                             authorized person          following the request of
                             executing this Agreement   the other party
                             and any Confirmation

Party B                      Audited annual             Upon request of Party A    Yes
                             consolidated financial     promptly following
                             statements, prepared in    availability of such
                             accordance with            statements
                             accounting principles
                             that are generally
                             accepted for
                             institutions of its type
                             in the jurisdiction of
                             its organization and
                             certified by independent
                             public accountants

Party B                      Unaudited interim          Upon request of Party A    Yes
                             consolidated financial     promptly following
                             statements prepared in     availability of such
                             accordance with            statements
                             accounting principles
                             that are generally
                             accepted for
                             institutions of its type
                             in the jurisdiction of
                             its organization

I.        PART   MISCELLANEOUS.



<PAGE>


                  A.        Addresses for Notices.  For purposes of Section 12(a) of this Agreement:

                  Address for notices or communications to Party A:

                  Bombardier Inc.
                  800 boul, Rene-Levesque ouest
                  Montreal (Quebec)
                  H3B 1Y8
                  Attention:  Vice President and Treasurer
                  Facsimile No.:   (514) 861-7053
                  Telephone No. for Confirmation:  (514) 861-9481
                  Telex No.:   055 62129
                  Answerback:  BOMCORPOFF MTL

                  Addresses for notices or communications to Party B:

                           515A Shaw Road
                  Dulles, VA 20166
                  Attention:  Director of Treasury Management
                  Facsimile No.: (703) 925-6299
                  Telephone No. for Confirmation:  (703) 925-6017

                           A.        Process Agent.  For purposes of Section 13(c) of this Agreement:

                                            1.        Party A appoints as its Process Agent:  Not Applicable.

                                            1.        Party B appoints as its Process Agent:  Not Applicable.

                           A.        Offices.  Not applicable.

                           A.        Multibranch Party.  For the purposes of Section 10(c) of this Agreement:

                  Party A is not a Multibranch Party.

                  Party B is not a Multibranch Party.

                           A.        Calculation Agent.  The Calculation Agent is Party A, unless otherwise specified in the
                  applicable Confirmation.

                           A.        Credit Support Document:

                  With respect to Party A, the following shall constitute Credit Support Documents:
                           Not applicable

                  With respect to Party B, the following shall constitute Credit
Support Documents:
                                                              1.        Guaranty dated as of July 11, 1997 by Atlantic Coast
                                                                        Airlines, Inc.

                           A.        Credit Support Provider.

                  Credit Support Provider means in relation to Party A:
                           Not applicable

                           Credit Support Provider means in relation to Party B:
                           Atlantic Coast Airlines, Inc.

                           A.        Governing Law.  This Agreement will be governed by and construed in accordance with the laws of
                  the State of New York (without reference to choice of law doctrine).

                           A.  Netting of  Payments.  Section  2(c)(ii)  of this
                  Agreement will apply to any Transaction  from the date of this
                  Agreement  (i.e.,  no netting) (other than with respect to the
                  payments of the premiums).

                           A.         "Affiliate" will have the meaning specified in Section 14 of this Agreement.


I.        PART   OTHER PROVISIONS



<PAGE>


                           A. ISDA  Definitions.  The 1991 ISDA Definitions (the
                  "Definitions")  and  the  1992  ISDA  FX and  Currency  Option
                  Definitions (the "FX Definitions"  and,  collectively with the
                  1991  Definitions,  the  "Definitions"),  as  published by the
                  International Swaps and Derivatives  Association,  Inc., shall
                  be  deemed  a part of this  Agreement  as if fully  set  forth
                  herein.

                           A.    Inconsistency.    Unless   expressly   provided
                  otherwise,  in the event of any  inconsistency  between any of
                  the  documents  listed below,  the document  listed first will
                  prevail:  (i) the Confirmation;  (ii) the Schedule;  (iii) the
                  printed   form  of  ISDA  Master   Agreement;   and  (iv)  the
                  Definitions,  including:  (A) the FX  Definitions  and (B) the
                  1991 Definitions.

                           A.  Right  of   Set-Off.   Any  amount   (the  "Early
                  Termination  Amount")  payable  to  Party  B by  Party A under
                  Section 6(e), in  circumstances  where Party B is a Defaulting
                  Party will at the option of Party A (and without  prior notice
                  to Party B), be reduced by its set-off  against any  amount(s)
                  (the "Other  Agreement  Amount") payable (whether at such time
                  or in the future or upon the occurrence of a  contingency)  by
                  Party B  (irrespective  of the  currency,  place of payment or
                  booking office of the obligation) under any other agreement(s)
                  between Party A and Party B or instrument(s) or undertaking(s)
                  issued or  executed by one party to, or in favor of, the other
                  party  (and the  Other  Agreement  Amount  will be  discharged
                  promptly  and in all respects to the extent it is so set-off).
                  Party A will give  notice to Party B of any  set-off  effected
                  hereunder.

                  For this purpose,  either the Early Termination  Amount or the
                  Other  Agreement  Amount  (or  the  relevant  portion  of such
                  amounts)  may be  converted  by Party A into the  currency  in
                  which  the other is  denominated  at the rate of  exchange  at
                  which such party would be able,  acting in a reasonable manner
                  and in good faith,  to purchase  the  relevant  amount of such
                  currency.

                  If an obligation is  unascertained,  Party A may in good faith
                  estimate  that  obligation  and  set-off  in  respect  of  the
                  estimate,  subject to the  relevant  party  accounting  to the
                  other when the obligation is ascertained.

                  Nothing  in this  Part  5(c)  shall be  effective  to create a
                  charge or other  security  interest.  This Part 5(c)  shall be
                  without  prejudice  and in  addition  to any right of set-off,
                  combination  of  accounts,  lien or other  right to which  any
                  party is at any time otherwise  entitled (whether by operation
                  of law, contract or otherwise).

                           A. Deduction or Withholding for Tax.  Neither Party A
                  nor Party B shall have an  obligation  to make payments to the
                  other under Section 2(d)(i)(4) of this Agreement to the extent
                  the  obligation  to make such payment  arises as a result of a
                  Change in Tax Law.

                           A.  Confirmations.  Each Confirmation shall be in the
                  standard  form  attached  hereto as Exhibit A. With respect to
                  each  Transaction,  Party A shall,  on or  promptly  after the
                  Trade  Date,  send  Party  B a  Confirmation  which  shall  be
                  promptly acknowledged by Party B.

                           A. Illegality. The "Illegality" provisions of Section
                  5(b)(i) shall be expanded to include the  obligation of either
                  party to comply with any directive, direction or similar order
                  of any applicable governmental agency or authority (whether or
                  not having the force of law) which specifically  prohibits its
                  performance under this Agreement.

                           A.        Additional Representations.  Section 3(a) is hereby amended by deleting the word "and" at the
                                     end of Section 3(a)(iv) and adding the following after Section 3(a)(v):

                           "  (vi)  Non-Reliance.  It  is  acting  for  its  own
                           account,   and  it  has  made  its  own   independent
                           decisions  to enter into that  Transaction  and as to
                           whether that Transaction is appropriate or proper for
                           it based upon its own  judgment  and upon advice from
                           such advisers as it has deemed  necessary.  It is not
                           relying on any communication (written or oral) of the
                           other   party   as   investment   advice   or   as  a
                           recommendation  to enter  into that  Transaction;  it
                           being  understood that  information and  explanations
                           related to the terms and  conditions of a Transaction
                           shall  not  be  considered  investment  advice  or  a
                           recommendation  to enter  into that  Transaction.  No
                           communication  (written  or oral)  received  from the
                           other  party  shall be deemed to be an  assurance  or
                           guarantee  as  to  the   expected   results  of  that
                           Transaction.

                                    (vii)  Assessment and  Understanding.  It is
                           capable of assessing the merits of and  understanding
                           (on   its   own   behalf   or   through   independent
                           professional  advice),  and  understands and accepts,
                           the terms,  conditions and risks of that Transaction.
                           It is also  capable of  assuming,  and  assumes,  the
                           risks of that Transaction.

                                    (viii) Status of Parties. The other party is
                           not acting as a fiduciary  for or an adviser to it in
                           respect of that Transaction."

                           A.  Equivalency  Clause.  For purposes of  disclosure
                  pursuant  to the  Interest  Act  (Canada),  the yearly rate of
                  interest  to which any rate of  interest  payable  under  this
                  Agreement or any  Confirmation,  which is to be  calculated on
                  any basis other than a full calendar  year, is equivalent  may
                  be  determined  by  multiplying  such rate by a  fraction  the
                  numerator of which is the number of days in the calendar  year
                  in which the period for which interest at such rate is payable
                  ends  and the  denominator  of  which  is the  number  of days
                  comprising such other basis.

                           A. Impossibility.  The occurrence of an Impossibility
                  shall also be a  Termination  Event,  as to which the Affected
                  Party  shall be the party  subject  to an  Impossibility.  For
                  purposes  of this  Agreement,  "Impossibility"  shall mean the
                  occurrence of a natural or man-made disaster,  armed conflict,
                  act  of  terrorism,  riot,  labour  disruption  or  any  other
                  circumstance  beyond  its  control  after  the date on which a
                  Transaction  is entered into which makes it impossible  (other
                  than as a result of its own misconduct) for such a party:

                                            1.  to  perform   any   absolute  or
                           contingent obligation,  to make a payment or delivery
                           or to  receive a payment  or  delivery  in respect of
                           such Transaction or to comply with any other material
                           provision   of  this   Agreement   relating  to  such
                           Transaction; or

                                            1. to  perform,  or for  any  Credit
                           Support   Provider  of  such  party  to  perform  any
                           contingent  or other  obligation  which the party (or
                           such Credit  Support  Provider)  has under any Credit
                           Support Document relating to such Transaction.

                           All terms and conditions of this Agreement applicable
                  to  an   Illegality   shall  be  equally   applicable   to  an
                  Impossibility and the definition of Termination Event shall be
                  amended to include Impossibility.

                           A.        Consent to Recording.  Each party consents to the recording of the telephone conversations of
                  relevant personnel of the parties in connection with this Agreement or any Transaction or potential Transaction.

                           A.  Waiver  of  Jury  Trial.  To the  fullest  extent
                  permitted by law, each party  irrevocably  waives its right to
                  trial by jury in any legal proceeding instituted in connection
                  with this Agreement or any Transaction.

                           A. Severability.  If any term, provision, covenant or
                  condition of this Agreement, or the application thereof to any
                  party  or  circumstance,  shall  be  held  to  be  invalid  or
                  unenforceable  (in  whole  or in  part)  for any  reason,  the
                  remaining  terms,  provisions,  covenants and conditions shall
                  continue  in full  force and effect as if this  Agreement  had
                  been  executed  with  the  invalid  or  unenforceable  portion
                  eliminated, so long as this Agreement as so modified continues
                  to express, without material change, the original intention of
                  the parties as to the subject  matter of this  Agreement,  and
                  the  deletion  of such  portion  of this  Agreement  does  not
                  substantially  impair the respective  benefits or expectations
                  of the parties to this Agreement.

                           A. Transfer.  An exception to the Transfer provisions
                  of Section 7 is that consent to transfer shall not be required
                  for a transfer by Party B (with prior written  notice to Party
                  A) to a United States market maker in transactions of the type
                  covered by this Agreement in connection  with a transaction by
                  Party B intended to unwind a transaction herein.




                                                                                BOMBARDIER INC.  ATLANTIC COAST AIRLINES


                  By:____________________________    By:____________________________
                        Name:                                                Name:
                        Title:                                               Title:




                  By:____________________________
                        Name:
                        Title:


                                                                                                          EXHIBIT A (Call Option)

                              FORM OF CONFIRMATION


                         [Letterhead of Bombardier Inc.]

                                                                                [Date]


Atlantic Coast Airlines
515A Shaw Road
Dulles, Virginia 20166
Attention: Director of Treasury Management
Fax No.:  (703) 925-6299

         Re:      Bombardier Reference Number ______
                  Bond Option Transaction (Call)


Ladies and Gentlemen:

         The purpose of this confirmation is to confirm the terms and conditions
of the Bond Option Transaction  entered into between us, Bombardier Inc. ("Party
A") and you,  Atlantic  Coast  Airlines  ("Party B") on the Trade Date specified
below (the "Transaction").
This confirmation is a "Confirmation" as referred to in the Agreement  specified
below.

         The definitions and provisions  contained in the 1991 ISDA  Definitions
(the  "Definitions"),  as published by the  International  Swaps and Derivatives
Association,  Inc., formerly known as the International Swap Dealers Association
("ISDA"),  are hereby  incorporated into this Confirmation by reference.  In the
event of any inconsistency  between the Definitions and this Confirmation,  this
Confirmation will govern. Capitalized terms not otherwise defined shall have the
meanings  given to them in the Agreement  (including the  Definitions  and other
documents incorporated therein by reference).

         This  Confirmation  supplements,  forms part of, and is subject to, the
ISDA Master  Agreement  dated as of July 11, 1997,  as amended and  supplemented
from  time to time  (the  "Agreement"),  between  you  and  us.  All  provisions
contained  in the  Agreement  govern  this  Confirmation,  except  as  expressly
modified below.

The terms of the particular  Transaction to which this Confirmation  relates are
as follows:

1.  General Terms:

Trade Date:                                               [date]

Option Style:                                             European

Option Type:                                              Call

Seller:                                                   Atlantic Coast Airlines

Buyer:                                                    Bombardier Inc.

Reference Bonds:                                          U.S. Treasury 6.625% due May 15, 2007

Number of Options:                                        One per Expiration Date.


Bond Entitlement:                                         For any Expiration Date, the amount set forth
                                                          for such date under the caption "Bond
                                                          Entitlement" on Schedule 1 attached hereto.

Partial Exercise:                                         Not applicable

Option Strike Price:                                      For any Expiration Date, the amount set forth
                                                          for such date under the caption "Option Strike
                                                          Price" on Schedule 1 attached hereto.

Premium:                                                  See Letter Agreement dated July __, 1997
                                                          between Party A and Party B.

Seller                                                    Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Exchange Business Day:~Any day that is a Seller           Currency Business Day:
Business Day and is a trading day on the Canadian
Exchange  other than a day on which  trading such exchange is scheduled to close
prior to its regular  weekday  closing time and is a day on which U.S.  Treasury
Markets are open for business in New York, New York.

Any day on which  commercial  banks are open for Local  Business  Day:  business
(including  dealings in foreign  exchange  and  foreign  currency  deposits)  in
Toronto/Montreal, Canada and New York, New York.

Any day on which  commercial  banks  are open for  Calculation  Agent:  business
(including  dealings in foreign exchange and foreign  currency  deposits) in the
city specified in the address for notice provided by the recipient.

Bombardier Inc., whose determinations and                 2.  Procedure for Exercise:
calculations shall be binding in the absence of
manifest error.

                                Expiration Date:

Each of the dates set forth on Schedule 1 attached Automatic  Exercise:  hereto,
or if that date is not an Exchange Business Day, the first following day that is
an Exchange Business Day.

An Option  will be deemed to be  automatically  In-the-Money:  exercised  on the
Expiration Date for such Option if such Option is In-the-Money, as determined by
the Calculation Agent.

An Option will be  "In-the-Money"  if the  Settlement  Reference  Price:  Amount
yields a positive amount.

For any  Option,  the  price  for the  Bonds  equal  in an  amount  to the  Bond
Entitlement  as  determined  in  good  faith  by the  Calculation  Agent  on the
Expiration  Date for such Option by  obtaining  the offered side price quoted by
"Cantor-Fitzgerald" on page 500 of Telerate at 11:00 a.m., provided that the bid
offer spread is at or within 3/32 in price.  If the Reference Bond is not quoted
on p. 500 of Telerate, then Bloomberg,  page PX7 [U.S. Bond 7-15 years] shall be
used as a replacement quotation.

3.  Settlement Terms:

Settlement:                                               Cash Settlement

Settlement Date:                                          For any Option, one Currency Business Day
                                                          following the Expiration Date for such Option.

Settlement                                                Amount:     For    any
                                                          Option,     on     the
                                                          Settlement   Date  for
                                                          such  Option,   Seller
                                                          shall pay to Buyer the
                                                          amount  by  which  the
                                                          Bond  Payment for such
                                                          Option   exceeds   the
                                                          Call  Amount  for such
                                                          Option.

Bond                                                      Payment:    For    any
                                                          Option, the product of
                                                          the  Reference   Price
                                                          for    such     Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Call                                                      Amounts:    For    any
                                                          Option, the product of
                                                          the   Option    Strike
                                                          Price for such  Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Failure to Deliver:                                       Failure by a party to deliver, when due, any
                                                          payment under this Option shall constitute an
                                                          Event of Default only, if on or before the
                                                          third Local Business Day after notice of the
                                                          failure is given to the party it does not
                                                          remedy such failure.

4.  Account Details:

         Account details of Buyer:                        National Bank of Canada

125 West 55th Street                                               Account details of Seller:
New York, NY  10019-5366
ABA No. 026005487
Account No. 015370001

Crestar Bank
Alexandria, VA
ABA No. 202369358
Account No. 051000020

         Please confirm that the foregoing correctly sets forth the terms of our
agreement by executing the copy of this  Confirmation  enclosed for that purpose
and  returning  it to us within two Business  Days after your receipt  hereof or
return  it to us  within  two  Business  Days  indicating  revisions  needed  to
accurately  reflect our  agreement.  If your reply is not  received by us within
this  time  period,  the  terms  stated  in this  Confirmation  will  constitute
conclusive  and binding  evidence of the terms of the  Transaction to which this
Confirmation relates, absent manifest error.

                                Yours sincerely,

                                 BOMBARDIER INC.


                                                              By:_________________________
                                                                    Name:
                                                                    Title:



                                                              By:_________________________
                                                                    Name:
                                                                    Title:


Confirmed as of the date first above written:

ATLANTIC COAST AIRLINES

By:__________________________
      Name:
      Title:

                                                                                                                        Schedule 1


<PAGE>









                                  July 11, 1997


Atlantic Coast Airlines
515A Shaw Road
Dulles, Virginia 20166
Attention: Director of Treasury Management
Fax No.:  (703) 925-6299

         Re:      Bombardier Reference Number ACA-2
                  Bond Option Transaction (Call)


Ladies and Gentlemen:

         The purpose of this confirmation is to confirm the terms and conditions
of the Bond Option Transaction  entered into between us, Bombardier Inc. ("Party
A") and you,  Atlantic  Coast  Airlines  ("Party B") on the Trade Date specified
below (the "Transaction").
This confirmation is a "Confirmation" as referred to in the Agreement  specified
below.

         The definitions and provisions  contained in the 1991 ISDA  Definitions
(the  "Definitions"),  as published by the  International  Swaps and Derivatives
Association,  Inc., formerly known as the International Swap Dealers Association
("ISDA"),  are hereby  incorporated into this Confirmation by reference.  In the
event of any inconsistency  between the Definitions and this Confirmation,  this
Confirmation will govern. Capitalized terms not otherwise defined shall have the
meanings  given to them in the Agreement  (including the  Definitions  and other
documents incorporated therein by reference).

         This  Confirmation  supplements,  forms part of, and is subject to, the
ISDA Master  Agreement  dated as of July 11, 1997,  as amended and  supplemented
from  time to time  (the  "Agreement"),  between  you  and  us.  All  provisions
contained  in the  Agreement  govern  this  Confirmation,  except  as  expressly
modified below.

The terms of the particular  Transaction to which this Confirmation  relates are
as follows:

1.  General Terms:

Trade Date:                                               July 11, 1997

Option Style:                                             European



<PAGE>


Option Type:                                              Call

Seller:                                                   Atlantic Coast Airlines

Buyer:                                                    Bombardier Inc.

Reference Bonds:                                          U.S. Treasury 6.625% due May 15, 2007

Number of Options:                                        One per Expiration Date.


Bond Entitlement:                                         For any Expiration Date, the amount set forth
                                                          for such date under the caption "Bond
                                                          Entitlement" on Schedule 1 attached hereto.

Partial Exercise:                                         Not applicable

Option Strike Price:                                      For any Expiration Date, the amount set forth
                                                          for such date under the caption "Option Strike
                                                          Price" on Schedule 1 attached hereto.

Premium:                                                  See Letter Agreement dated July 11, 1997
                                                          between Party A and Party B.

Seller                                                    Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Exchange Business Day:                                    Any day that is a Seller Business Day and is a
                                                          trading day on the Canadian Exchange other than
                                                          a day on which trading such exchange is
                                                          scheduled to close prior to its regular weekday
                                                          closing time and is a day on which U.S.
                                                          Treasury Markets are open for business in New
                                                          York, New York.

Currency                                                  Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Local                                                     Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          the city  specified in
                                                          the address for notice
                                                          provided     by    the
                                                          recipient.

Calculation Agent:                                        Bombardier Inc., whose determinations and
                                                          calculations shall be binding in the absence of
                                 manifest error.

2.  Procedure for Exercise:

Expiration Date:                                          Each of the dates set forth on Schedule 1
                                                          attached hereto, or if that date is not an
                                                          Exchange Business Day, the first following day
                                                          that is an Exchange Business Day.

Automatic Exercise:                                       An Option will be deemed to be automatically
                                                          exercised on the Expiration Date for such
                                                          Option if such Option is In-the-Money, as
                                                          determined by the Calculation Agent.

In-the-Money:                                             An Option will be "In-the-Money" if the
                                                          Settlement Amount yields a positive amount.

Reference Price:                                          For any Option, the price for the Bonds equal
                                                          in an amount to the Bond Entitlement as
                                                          determined in good faith by the Calculation
                                                          Agent on the Expiration Date for such Option by
                                                          obtaining the offered side price quoted by
                                                          "Cantor-Fitzgerald" on page 500 of Telerate at
                                                          11:00 a.m., provided that the bid offer spread
                                                          is at or within 3/32 in price.  If the
                                                          Reference Bond is not quoted on p. 500 of
                                                          Telerate, then Bloomberg, page PX7 [U.S. Bond
                                                          7-15 years] shall be used as a replacement
                                                          quotation.

3.  Settlement Terms:

Settlement:                                               Cash Settlement

Settlement Date:                                          For any Option, one Currency Business Day
                                                          following the Expiration Date for such Option.

Settlement                                                Amount:     For    any
                                                          Option,     on     the
                                                          Settlement   Date  for
                                                          such  Option,   Seller
                                                          shall pay to Buyer the
                                                          amount  by  which  the
                                                          Bond  Payment for such
                                                          Option   exceeds   the
                                                          Call  Amount  for such
                                                          Option.

Bond                                                      Payment:    For    any
                                                          Option, the product of
                                                          the  Reference   Price
                                                          for    such     Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Call                                                      Amounts:    For    any
                                                          Option, the product of
                                                          the   Option    Strike
                                                          Price for such  Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Failure to Deliver:                                       Failure by a party to deliver, when due, any
                                                          payment under this Option shall constitute an
                                                          Event of Default only, if on or before the
                                                          third Local Business Day after notice of the
                                                          failure is given to the party it does not
                                                          remedy such failure.

4.  Account Details:

         Account details of Buyer:                        National Bank of Canada
                              125 West 55th Street
                             New York, NY 10019-5366
                                ABA No. 026005487
                              Account No. 015370001

         Account details of Seller:                       Crestar Bank
                                 Alexandria, VA
                                ABA No. 202369358
                              Account No. 051000020


         Please confirm that the foregoing correctly sets forth the terms of our
agreement by executing the copy of this  Confirmation  enclosed for that purpose
and  returning  it to us within two Business  Days after your receipt  hereof or
return  it to us  within  two  Business  Days  indicating  revisions  needed  to
accurately  reflect our  agreement.  If your reply is not  received by us within
this  time  period,  the  terms  stated  in this  Confirmation  will  constitute
conclusive  and binding  evidence of the terms of the  Transaction to which this
Confirmation relates, absent manifest error.

                                                                                          Yours sincerely,

                                                                                           BOMBARDIER INC.


                                                                                    By:_________________________
                                                                                                   Name:
                                                                                                  Title:



                                                                                    By:_________________________
                                                                                                   Name:
                                                                                                  Title:


                            Confirmed as of the date
                              first above written:

                             ATLANTIC COAST AIRLINES

                          By:__________________________
                                      Name:
                                     Title:



<PAGE>






                              Terms of Call Option


             Option              Bond Entitlement                   Option Strike Price

         March 16, 1998             $ 6,645,757                        102 15/32

         April 15, 1998                        6,659,432                        102 11/32

         May 15, 1998                          6,579,357                        102 10/32

         July 15, 1998                         6,613,850                        102 4/32

         August 17, 1998               6,627,540                       102 2/32

         September 15, 1998                    6,641,231                        102 4/32


























                                                                                                            EXHIBIT A (Put Option)


                              FORM OF CONFIRMATION


                         [Letterhead of Bombardier Inc.]

                                                                                [Date]


Atlantic Coast Airlines
515A Shaw Road
Dulles, Virginia 20166
Attention: Director of Treasury Management
Fax No.: (703) 925-6299

         Re:      Bombardier Reference Number ______
                  Bond Option Transaction (Put)


Ladies and Gentlemen:

         The purpose of this confirmation is to confirm the terms and conditions
of the Bond Option Transaction  entered into between us, Bombardier Inc. ("Party
A") and you,  Atlantic  Coast  Airlines  ("Party B") on the Trade Date specified
below (the "Transaction").
This confirmation is a "Confirmation" as referred to in the Agreement  specified
below.

         The definitions and provisions  contained in the 1991 ISDA  Definitions
(the  "Definitions"),  as published by the  International  Swaps and Derivatives
Association,  Inc., formerly known as the International Swap Dealers Association
("ISDA"),  are hereby  incorporated into this Confirmation by reference.  In the
event of any inconsistency  between the Definitions and this Confirmation,  this
Confirmation will govern. Capitalized terms not otherwise defined shall have the
meanings  given to them in the Agreement  (including the  Definitions  and other
documents incorporated therein by reference).

         This  Confirmation  supplements,  forms part of, and is subject to, the
ISDA Master  Agreement  dated as of July 11, 1997,  as amended and  supplemented
from  time to time  (the  "Agreement"),  between  you  and  us.  All  provisions
contained  in the  Agreement  govern  this  Confirmation,  except  as  expressly
modified below.

The terms of the particular  Transaction to which this Confirmation  relates are
as follows:

1.  General Terms:

Trade Date:                                               [date]

Option Style:                                             European

Option Type:                                              Put

Seller:                                                   Bombardier Inc.

Buyer:                                                    Atlantic Coast Airlines

Reference Bonds:                                          U.S. Treasury 6.625% due May 15, 2007

Number of Options:                                        One per Expiration Date.


Bond Entitlement:                                         For any Expiration Date, the amount set forth
                                                          for such date under the caption "Bond
                                                          Entitlement" on Schedule 1 attached hereto.

Partial Exercise:                                         Not applicable

Option Strike Price:                                      For any Expiration Date, the amount set forth
                                                          for such date under the caption "Option Strike
                                                          Price" on Schedule 1 attached hereto.

Premium:                                                  See Letter Agreement dated July __, 1997
                                                          between Party A and Party B.

Seller                                                    Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Exchange Business Day:~Any day that is a Seller           Currency Business Day:
Business Day and is a trading day on the Canadian
Exchange  other than a day on which  trading such exchange is scheduled to close
prior to its regular  weekday  closing time and is a day on which U.S.  Treasury
Markets are open for business in New York, New York.

Any day on which  commercial  banks are open for Local  Business  Day:  business
(including  dealings in foreign  exchange  and  foreign  currency  deposits)  in
Toronto/Montreal, Canada and New York, New York.

Any day on which  commercial  banks  are open for  Calculation  Agent:  business
(including  dealings in foreign exchange and foreign  currency  deposits) in the
city specified in the address for notice provided by the recipient.

Bombardier Inc., whose determinations and                 2.  Procedure for Exercise:
calculations shall be binding in the absence of
manifest error.

                                Expiration Date:

Each of the dates set forth on Schedule 1 attached Automatic  Exercise:  hereto,
or if that date is not an Exchange Business Day, the first following day that is
an Exchange Business Day.

An Option  will be deemed to be  automatically  In-the-Money:  exercised  on the
Expiration Date for such Option if such Option is In-the-Money, as determined by
the Calculation Agent.

An Option will be  "In-the-Money"  if the  Settlement  Reference  Price:  Amount
yields a positive amount.

For any  Option,  the  price  for the  Bonds  equal  in an  amount  to the  Bond
Entitlement  as  determined  in  good  faith  by the  Calculation  Agent  on the
Expiration  Date for such Option by  obtaining  the offered side price quoted by
"Cantor-Fitzgerald" on page 500 of Telerate at 11:00 a.m., provided that the bid
offer spread is at or within 3/32 in price.  If the Reference Bond is not quoted
on page 500 of Telerate,  then Bloomberg,  page PX7 [U.S. Bond 7-15 years] shall
be used as a replacement quotation.

3.  Settlement Terms:

Settlement:                                               Cash Settlement

Settlement Date:                                          For any Option, one Currency Business Day
                                                          following the Expiration Date for such Option.

Settlement Amount:                                        For any Option, on the Settlement Date, Seller
                                                          shall pay to Buyer the amount by which the Put
                                                          Amount for such Option exceeds the Bond Payment
                                                          for such Option.

Bond                                                      Payment:    For    any
                                                          Option, the product of
                                                          the  Reference   Price
                                                          for    such     Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Put                                                       Amount:     For    any
                                                          Option, the product of
                                                          the   Option    Strike
                                                          Price for such  Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Failure to Deliver:                                       Failure by a party to deliver, when due, any
                                                          payment under this Option shall constitute an
                                                          Event of Default only, if on or before the
                                                          third Local Business Day after notice of the
                                                          failure is given to the party it does not
                                                          remedy such failure.

4.  Account Details:

         Account details of Seller:                       National Bank of Canada
                              125 West 55th Street

New York, NY  10019-5366                                           Account details of Buyer:
ABA No. 026005487
Account No. 015370001

Crestar Bank
Alexandria, VA
ABA No. 202369358
Account No. 051000020

         Please confirm that the foregoing correctly sets forth the terms of our
agreement by executing the copy of this  Confirmation  enclosed for that purpose
and  returning  it to us within two Business  Days after your receipt  hereof or
return  it to us  within  two  Business  Days  indicating  revisions  needed  to
accurately  reflect our  agreement.  If your reply is not  received by us within
this  time  period,  the  terms  stated  in this  Confirmation  will  constitute
conclusive  and binding  evidence of the terms of the  Transaction to which this
Confirmation relates, absent manifest error.

                                Yours sincerely,

                                 BOMBARDIER INC.


                                                              By:_________________________
                                                                    Name:
                                                                    Title:



                                                              By:_________________________
                                                                    Name:
                                                                    Title:


Confirmed as of the date first above written:

ATLANTIC COAST AIRLINES

By:__________________________
      Name:
      Title:

<PAGE>


                                                                                                                        Schedule 1

                               Terms of Put Option

                                                                                           Option
         Option                     Bond Entitlement                   Strike Price



<PAGE>





                                                                                July 11, 1997


Atlantic Coast Airlines
515A Shaw Road
Dulles, Virginia 20166
Attention: Director of Treasury Management
Fax No.: (703) 925-6299

         Re:      Bombardier Reference Number ACA-1
                  Bond Option Transaction (Put)


Ladies and Gentlemen:

         The purpose of this confirmation is to confirm the terms and conditions
of the Bond Option Transaction  entered into between us, Bombardier Inc. ("Party
A") and you,  Atlantic  Coast  Airlines  ("Party B") on the Trade Date specified
below (the "Transaction").
This confirmation is a "Confirmation" as referred to in the Agreement  specified
below.

         The definitions and provisions  contained in the 1991 ISDA  Definitions
(the  "Definitions"),  as published by the  International  Swaps and Derivatives
Association,  Inc., formerly known as the International Swap Dealers Association
("ISDA"),  are hereby  incorporated into this Confirmation by reference.  In the
event of any inconsistency  between the Definitions and this Confirmation,  this
Confirmation will govern. Capitalized terms not otherwise defined shall have the
meanings  given to them in the Agreement  (including the  Definitions  and other
documents incorporated therein by reference).

         This  Confirmation  supplements,  forms part of, and is subject to, the
ISDA Master  Agreement  dated as of July 11, 1997,  as amended and  supplemented
from  time to time  (the  "Agreement"),  between  you  and  us.  All  provisions
contained  in the  Agreement  govern  this  Confirmation,  except  as  expressly
modified below.

The terms of the particular  Transaction to which this Confirmation  relates are
as follows:

1.  General Terms:

Trade Date:                                               July 11, 1997

Option Style:                                             European



<PAGE>


Option Type:                                              Put

Seller:                                                   Bombardier Inc.

Buyer:                                                    Atlantic Coast Airlines

Reference Bonds:                                          U.S. Treasury 6.625% due May 15, 2007

Number of Options:                                        One per Expiration Date.


Bond Entitlement:                                         For any Expiration Date, the amount set forth
                                                          for such date under the caption "Bond
                                                          Entitlement" on Schedule 1 attached hereto.

Partial Exercise:                                         Not applicable

Option Strike Price:                                      For any Expiration Date, the amount set forth
                                                          for such date under the caption "Option Strike
                                                          Price" on Schedule 1 attached hereto.

Premium:                                                  See Letter Agreement dated July 11, 1997
                                                          between Party A and Party B.

Seller                                                    Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Exchange Business Day:                                    Any day that is a Seller Business Day and is a
                                                          trading day on the Canadian Exchange other than
                                                          a day on which trading such exchange is
                                                          scheduled to close prior to its regular weekday
                                                          closing time and is a day on which U.S.
                                                          Treasury Markets are open for business in New
                                                          York, New York.

Currency                                                  Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          Toronto/Montreal,
                                                          Canada  and New  York,
                                                          New York.

Local                                                     Business  Day: Any day
                                                          on  which   commercial
                                                          banks   are  open  for
                                                          business    (including
                                                          dealings   in  foreign
                                                          exchange  and  foreign
                                                          currency  deposits) in
                                                          the city  specified in
                                                          the address for notice
                                                          provided     by    the
                                                          recipient.

Calculation Agent:                                        Bombardier Inc., whose determinations and
                                                          calculations shall be binding in the absence of
                                 manifest error.

2.  Procedure for Exercise:

Expiration Date:                                          Each of the dates set forth on Schedule 1
                                                          attached hereto, or if that date is not an
                                                          Exchange Business Day, the first following day
                                                          that is an Exchange Business Day.

Automatic Exercise:                                       An Option will be deemed to be automatically
                                                          exercised on the Expiration Date for such
                                                          Option if such Option is In-the-Money, as
                                                          determined by the Calculation Agent.

In-the-Money:                                             An Option will be "In-the-Money" if the
                                                          Settlement Amount yields a positive amount.

Reference Price:                                          For any Option, the price for the Bonds equal
                                                          in an amount to the Bond Entitlement as
                                                          determined in good faith by the Calculation
                                                          Agent on the Expiration Date for such Option by
                                                          obtaining the offered side price quoted by
                                                          "Cantor-Fitzgerald" on page 500 of Telerate at
                                                          11:00 a.m., provided that the bid offer spread
                                                          is at or within 3/32 in price.  If the
                                                          Reference Bond is not quoted on page 500 of
                                                          Telerate, then Bloomberg, page PX7 [U.S. Bond
                                                          7-15 years] shall be  used as a replacement
                                                          quotation.

3.  Settlement Terms:

Settlement:                                               Cash Settlement

Settlement Date:                                          For any Option, one Currency Business Day
                                                          following the Expiration Date for such Option.

Settlement Amount:                                        For any Option, on the Settlement Date, Seller
                                                          shall pay to Buyer the amount by which the Put
                                                          Amount for such Option exceeds the Bond Payment
                                                          for such Option.

Bond                                                      Payment:    For    any
                                                          Option, the product of
                                                          the  Reference   Price
                                                          for    such     Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Put                                                       Amount:     For    any
                                                          Option, the product of
                                                          the   Option    Strike
                                                          Price for such  Option
                                                          multiplied by the Bond
                                                          Entitlement  for  such
                                                          Option  multiplied  by
                                                          the  number of Options
                                                          exercised    on    the
                                                          Expiration   Date  for
                                                          such Option.

Failure to Deliver:                                       Failure by a party to deliver, when due, any
                                                          payment under this Option shall constitute an
                                                          Event of Default only, if on or before the
                                                          third Local Business Day after notice of the
                                                          failure is given to the party it does not
                                                          remedy such failure.

4.  Account Details:

         Account details of Seller:                       National Bank of Canada
                              125 West 55th Street
                             New York, NY 10019-5366
                                ABA No. 026005487
                              Account No. 015370001

         Account details of Buyer:                        Crestar Bank
                                 Alexandria, VA
                                ABA No. 202369358
                              Account No. 051000020


         Please confirm that the foregoing correctly sets forth the terms of our
agreement by executing the copy of this  Confirmation  enclosed for that purpose
and  returning  it to us within two Business  Days after your receipt  hereof or
return  it to us  within  two  Business  Days  indicating  revisions  needed  to
accurately  reflect our  agreement.  If your reply is not  received by us within
this  time  period,  the  terms  stated  in this  Confirmation  will  constitute
conclusive  and binding  evidence of the terms of the  Transaction to which this
Confirmation relates, absent manifest error.

                                Yours sincerely,

                                 BOMBARDIER INC.


                                                              By:_________________________
                                                                    Name:
                                                                    Title:



                                                              By:_________________________
                                                                    Name:
                                                                    Title:


Confirmed as of the date first above written:

ATLANTIC COAST AIRLINES

By:__________________________
      Name:
      Title:

<PAGE>




                               Terms of Put Option

                                                                                        Option
                  Option                      Bond Entitlement                       Strike Price
            March 16, 1998                       $ 6,645,757                           100  3/32

            April 15, 1998                          6,659,432                           99 30/32

            May 15, 1998                            6,579,357                           99 26/32

            July 15, 1998                           6,613,850                           99 17/32

            August 17, 1998                         6,627,540                           99 12/32

            September 15, 1998                      6,641,231                           99   8/32


</TABLE>

<TABLE>
<S>     <C> 
Exhibit 23.1


                         Consent of Independent Auditors



The Board of Directors
Atlantic Coast Airlines, Inc.


We consent to the incorporation by reference in the registration  statement nos.
333-15795 and 33-67492 on Form S-8 of our report dated January 28, 1998,  except
as to note 17 which is as of March 4, 1998, relating to the consolidated balance
sheet of Atlantic  Coast  Airlines,  Inc. and subsidiary  (the  "Company") as of
December 31, 1997 and the related  consolidated  statements of operations,  cash
flows and changes in stockholders'  equity for the year then ended, which report
appears in the December 31, 1997 Annual Report on Form 10-K of the Company.


                                                                          /S/                
                                                                 --------------------------     
                                                                 KPMG Peat Marwick LLP


Washington, D.C.
March 23, 1998
</TABLE>

<TABLE>
<S>     <C> 
Exhibit 23.2




               CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANTS




Board of Directors
Atlantic Coast Airlines, Inc.


We  hereby  consent  to the  incorporation  by  reference  in  the  Registration
Statement on Form S-8 (No. 333-15795 and 33-67492) of our report,  dated January
24, 1997, except for Note 18, the date of which is May 29, 1997, relating to the
consolidated financial statements and schedule of Atlantic Coast Airlines,  Inc.
appearing  in the  Company's  Annual  Report  on Form  10-K for the  year  ended
December 31, 1997.




                                                                             /S/
                                                                 ----------------------------
                                                                 BDO Seidman, LLP


Washington, D.C.
March 23, 1998
</TABLE>


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