Document:

<Page>

                                                                Exhibit 10.13(l)

                                  CONFIDENTIAL

              AMENDMENT NUMBER 12 TO PURCHASE AGREEMENT GCT-025/98

This Amendment Number 12 to Purchase Agreement GCT-025/98, dated as of July __,
2001 ("Amendment No. 12") relates to the Purchase Agreement GCT-025/98 (the
"Purchase Agreement") between EMBRAER - Empresa Brasileira de Aeronautica S.A.
("Embraer") and Solitair Corp. ("Buyer") dated June 17, 1998 as amended from
time to time (collectively referred to herein as "Agreement"). This Amendment
No. 12 is between Embraer and Buyer, collectively referred to herein as the
"Parties".

This Amendment No. 12 constitutes an amendment and modification regarding the
incorporation of Major Changes and other modifications, pursuant to Article 11.a
and 11.g of the Purchase Agreement. Except as otherwise provided for herein all
terms of the Purchase Agreement shall remain in full force and effect. All
capitalized terms used in this Amendment No. 12 which are not defined herein
shall have the meaning given in the Purchase Agreement. In the event of any
conflict between this Amendment No. 12 and the Purchase Agreement the terms,
conditions and provisions of this Amendment No. 12 shall control.

WHEREAS, Attachment A of the Purchase Agreement will be altered in order to
comply with the configuration modifications to the US Airways, Trans World
Express ("TWE") and America West requirements.

WHEREAS, the Aircraft configuration has been changed in order to include the
next generation passenger seats, new gust lock system, increase on galley weight
capacity, new cargo liners, new APU air intake net installation and alterations
in the aircraft passenger door, new AHARS, VOR system, which will affect the
Aircraft Performance Guarantee;

WHEREAS, the Aircraft configuration has been changed in order to include the
AFDAU equipment, A1P engines and exclude the specific emergency equipment items,
JAA provisions and matched skin panels, which will affect the Aircraft Basic
Price and the Performance Guarantee.

NOW, THEREFORE, for good and valuable consideration which is hereby acknowledged
Embraer and Buyer hereby agree as follows:

1.    ATTACHMENT A ALTERATIONS:

1.1   Attachment "A" to Purchase Agreement will be replaced by Attachments
      "A-1", "A-2" and "A-3", attached to this Amendment No. 12, in order to
      comply with US Airways (Attachment "A-1"), TWE (Attachment "A-2") and
      America West (Attachment "A-3") requirements for certain Aircraft, as
      applicable.

1.2   All modifications identified on Section 2 of this Amendment No. 12 will be
      referred

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                                  CONFIDENTIAL

      as changes to Attachment "A" and will alter simultaneously the Attachments
      "A-1", "A-2" and "A-3", unless when specifically mentioned.

1.3   Buyer shall inform Embraer the configuration for each Aircraft in
      accordance with Sections 3 and 4 of Attachment "A".

2.    EQUIPMENT CONFIGURATION CHANGES:

2.1.  For Aircraft #10 and all subsequent Aircraft:

      (i) item 2.2 of Attachments "A-2" and "A-3" to the Agreement, "OPTIONAL
      SYSTEM/OTHER EQUIPMENT" is hereby amended by replacing item "m" as
      follows:

            "...
            m) S tandard door"

      (ii) item 2.2 of Attachment "A" to the Agreement, "OPTIONAL SYSTEM/OTHER
      EQUIPMENT" is hereby amended by inserting after item "m" the following:

            "...
            n) New gust lock system"

      (iii) item 2.3 of Attachment "A" to the Agreement, "INTERIOR OPTIONAL
      ITEMS" is hereby amended by inserting after item "i" the following:

            "...
            j) Next generation passenger seats"

2.2.  For Aircraft #11 and all subsequent Aircraft, item 2.1 of Attachment "A"
      to the Agreement, "OPTIONS TO THE STANDARD AVIONICS CONFIGURATION" is
      hereby amended by inserting after item "i" the following:

            "...
            j) Auxiliary Flight Data Acquisition Unit (AFDAU)"

2.3.  For Aircraft #16 and all subsequent Aircraft, item 2.2 of Attachment "A"
      to the Agreement, "OPTIONAL SYSTEM / OTHER EQUIPMENT", is hereby amended
      by inserting after item "n" the following:

            "...
            o) Rolls Royce Allison AE3007A1P engines"

This modification will only apply for Aircraft to be operated by Chautauqua
Airlines, Inc.

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                                  CONFIDENTIAL

2.4.  For Aircraft #18 and all subsequent Aircraft, item 2.2. of Attachment "A"
      to the Agreement, "OPTIONAL SYSTEM / OTHER EQUIPMENT", is hereby amended
      by deleting the following items "i", "j", "k" and "l":

            "...
            i) Structural provision for 10(degree)rudder deflection
            j) Wiring provision for the nose landing gear door position
            indication in the EICAS
            k) Provision for warning of the selection of Flaps 22(degree)to
            take-off
            l) Provision for limitation of the hydraulic pressure on the speed
            brake actuator when the aircraft is above 200 knots"

      And replacing them with the following:

            "...
            i) Intentionally deleted
            j) Intentionally deleted
            k) Intentionally deleted
            l) Intentionally deleted"

2.5.  For Aircraft #19, 21, 22, 23, 25 and all subsequent Aircraft, item 2.3 of
      Attachment "A" to the Agreement, "INTERIOR OPTIONAL ITEMS" is hereby
      amended by inserting after item "j" the following:

            "...
            k) New Galley Weight Capacity"

2.6.  For Aircraft #22 and all subsequent Aircraft, item 2.2 of Attachment "A"
      to the Agreement, "OPTIONAL SYSTEM / OTHER EQUIPMENT", is hereby amended
      by inserting after item "o" the following

            "...
            p ) New APU Air Inlet Installation"

2.7.  For Aircraft #23 and all subsequent Aircraft, item 2.2. of Attachment "A"
      to the Agreement, "OPTIONAL SYSTEM / OTHER EQUIPMENT", is hereby amended
      by deleting item "d" and replacing it with the following text, due to the
      change from the matched to the standard skin panels:

            "...
            d) Standard External Painting"

2.8.  For Aircraft #26 and all subsequent Aircraft:

<Page>

                                  CONFIDENTIAL

      (i)   item 2.1 of Attachment "A" to the Agreement, "OPTIONS TO THE
            STANDARD AVIONICS CONFIGURATION" is hereby amended by inserting
            after item "j" the following:

            "...
            k) VOR system
            l) AHRS H900 Honeywell system"

      (ii)  item 2.2 of Attachment "A" to the Agreement "OPTIONAL SYSTEM/OTHER
            EQUIPMENT" is hereby amended by inserting after item "l" the
            following:

            "...
            q) New Corrosion Prevention component"

2.9.  For Aircraft #29 and all subsequent Aircraft, item 2.3 of Attachment "A"
      to the Agreement, "INTERIOR OPTIONAL ITEMS", is hereby amended by
      inserting after "k" the following:

            "...
            l) Improved Overhead Bins"

2.10. For Aircraft #30 and all subsequent Aircraft, item 2.3 of Attachment "A"
      to the Agreement, "INTERIOR OPTIONAL ITEMS", is hereby amended by
      inserting after item "l" the following:

            "...
            m) New Cargo Liners"

2.11. For Aircraft #30 and all subsequent Aircraft, item 2.3 of Attachment "A"
      to the Agreement, "INTERIOR OPTIONAL ITEMS", is hereby amended by
      inserting after item "m" the following Buyer Furnished Equipment ("BFE"),
      due to Buyer's request to supply such emergency equipment:

            "...
            n) BFE Emergency equipment supplied by Buyer:
                  n.1) PBE 119003 Puritan Bennett
                  n.2) PBE bracket 119063-01 Puritan Bennett
                  n.3) Smoke goggles 322-70 Scott Aviation
                  n.4) First aid kit 70004-00 Scott Aviation
                  n.5) Medical kit 4531 Medical Advisory Sys.
                  n.6) Fire ext. A352T HRD Aero Sys.
                  n.7) Fire ext. bracket 817 HRD Aero Sys."

<Page>

                                  CONFIDENTIAL

3.    AIRCRAFT BASIC PRICES CHANGES

3.1   The changes referred to in items 2.1, 2.5, 2.6, 2.8, 2.9 and 2.10 will [*]

3.2   The changes referred to in item 2.2, 2.3, 2.4, 2.7 and 2.11 will change
      the Basic Price for [*]

<Table>
<Caption>
  --------------------------------------------------------------------------------------------------------------
                                                                                         BASIC PRICE IN
    ITEM        AIRCRAFT #        BASIC PRICE CHANGE   TOTAL BASIC PRICE CHANGE           JANUARY 2000
  --------------------------------------------------------------------------------------------------------------
<S>           <C>                      <C>                     <C>                       <C>
     2.2       11 through 15          [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
     2.3         16 and 17            [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
     2.4.      18 through 22          [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
     2.7       23 through 27          [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
                28 and 29*            [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
    2.11       30 through 45          [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
              Option Aircraft         [*]                      [*]                       [*]
  --------------------------------------------------------------------------------------------------------------
</Table>

*     Prior to this Amendment, the Basic Price of Aircraft 28 through 45 was
      [*]

3.3   As a result of the changes described in 3.2 above, the Aircraft Basic
      Price table on Article "3.a.1" for Aircraft #11 and all subsequent
      Aircraft shall be deleted and replace with the following:

<Table>
<Caption>
      --------------------------------------------------------------------------------------------------------------------
            Aircraft #                                         Price
      --------------------------------------------------------------------------------------------------------------------
<S>                           <C>
            "11 TO 15         [*]

      --------------------------------------------------------------------------------------------------------------------
            16 and 17         [*]

      --------------------------------------------------------------------------------------------------------------------
             18 to 22         [*]

      --------------------------------------------------------------------------------------------------------------------
             23 to 27         [*]

      --------------------------------------------------------------------------------------------------------------------
            28 and 29         [*]

      --------------------------------------------------------------------------------------------------------------------
          30 through 45       [*]

      --------------------------------------------------------------------------------------------------------------------
</Table>

----------
* Confidential
<Page>

                                  CONFIDENTIAL

4.    OPTION AIRCRAFT BASIC PRICE: Article 24.b shall be deleted and replaced
      with the following:

      "b.   BASIC PRICE: The unit basic price of each Option Aircraft shall be
            [*]), provided that such Option Aircraft be delivered to Buyer
            in accordance with the chart above and in the same configuration,
            specification and installations specified in Attachment "A",
            as such attachment is written on the date of signature of
            this Amendment No. 12 unless otherwise modified by the Parties
            and the costs for such changes shall be in addition to the
            Basic Price."

5.    CHANGES IN THE AIRCRAFT PERFORMANCE GUARANTEE: Attachment J to the
      Agreement is hereby amended as follows with respect to the specified
      Aircraft:

a.    AIRCRAFT #10 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF NEW GUST LOCK
      SYSTEM AND NEXT GENERATION PASSENGER SEATS

      (i)   In section 1.a.2.1, the amount "11,969 Pounds (5,430 kg)" is deleted
            and replaced with "11,965 Pounds (5,428 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                              WEIGHT (kg)       WEIGHT (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                       <C>             <C>
        2 - Option to Std EMB-145 Aircraft (*)                            595             1,311
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,795           26,003
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,351           27,229
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", items B, and C shall
            be modified by added the following new provisions at the end of each
            section, and the "SUBTOTAL" shall be modified as follows:

<Table>
<Caption>
        -------------------------------------------------------------------------------------------------------------
        ITEMS                                                                  OPT       WEIGHT (kg)    WEIGHT (lb)
        -------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>          <C>            <C>
        B) OPTIONS SYSTEM/OTHER EQUIPMENT
        -------------------------------------------------------------------------------------------------------------
        New gust lock system                                                    Y            1.8            3.9
        -------------------------------------------------------------------------------------------------------------
        C) INTERIOR OPTIONAL ITEMS
        -------------------------------------------------------------------------------------------------------------
        Next generation passenger seats                                         Y             -              -
        -------------------------------------------------------------------------------------------------------------
                                              SUB-TOTAL (OPTIONS STD A/C)                    595           1,311
        -------------------------------------------------------------------------------------------------------------
</Table>

----------
* Confidential

<Page>

                                  CONFIDENTIAL

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,003 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,263 Pounds"

b.    AIRCRAFT #11 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF AFDAU

      (i)   in section 1.a.2.1, the amount "11,965 Pounds (5,428 kg)" is deleted
            and replaced with "11,944 Pounds (5,418 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                                 WEIGHT           WEIGHT
                                                                          (kg)             (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            605             1,332
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,805           26,024
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,361           27,250
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", item A shall be
            modified by added the following new provisions at the end of such
            and the "SUBTOTAL" shall be modified as follows:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>          <C>            <C>
         A) OPTIONS TO STD AVIONIC CONFIGURATION
         ------------------------------------------------------------------------------------------------------------
         Auxiliary Flight Data Acquisition Unit (AFDAU)                         Y            9.6            21
         ------------------------------------------------------------------------------------------------------------
                                               SUB-TOTAL (OPTIONS STD A/C)                   605           1,332
         ------------------------------------------------------------------------------------------------------------
</Table>

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,024 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,284 Pounds"

<Page>

                                  CONFIDENTIAL

c.    AIRCRAFT #16 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF AE3007A1P ENGINES

      (i)   The first paragraph of Section 1 - GUARANTEES, shall be deleted and
            replaced by the following:

            "Embraer, subject to the conditions and limitations hereby
            expressed, and considering the Aircraft with a maximum takeoff
            weight of 48,501 pounds (22,000 kg) and equipped with EMBRAER
            furnished Rolls-Royce Allison AE 3007A1P engines, guarantees each
            Aircraft as follows:"

      (ii)  in section 1.a.2.1 and 1.a.2.3 will not be changed as there is no
            weight alteration;

      (iii) in section 1.a.2.4, "Customer Options Table", section B shall be
            modified by added the following new provision at the end of such
            section:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>           <C>            <C>
         B) OPTIONS SYSTEM/OTHER EQUIPMENT
         ------------------------------------------------------------------------------------------------------------
         Rolls Royce Allison AE3007A1P engines                                  Y             -              -
         ------------------------------------------------------------------------------------------------------------
</Table>

d.    AIRCRAFT #18 AND ALL SUBSEQUENT AIRCRAFT - EXCLUSION OF PROVISIONS FOR JAA
      CERTIFICATION

      (i)   in section 1.a.2.1, the amount "11,944 Pounds (5,418 kg)" is deleted
            and replaced with "11,949 Pounds (5,420 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                                WEIGHT            WEIGHT
                                                                         (kg)              (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            603             1,327
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,803           26,019
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,359           27,245
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", item B shall be
            modified changing the weight and observation (1) as indicated below:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>         <C>            <C>
         B) OPTIONS SYSTEM/OTHER EQUIPMENT
         ------------------------------------------------------------------------------------------------------------
         Provisions for JAA Certification (1)                                   Y            2.0            4.5
         ------------------------------------------------------------------------------------------------------------
                                               SUB-TOTAL (OPTIONS STD A/C)                   603           1,327
         ------------------------------------------------------------------------------------------------------------
           (1) Provisions for JAA Certification:
</Table>

<Page>

                                  CONFIDENTIAL

            - Wiring provision on the panel lamps for Filament Test

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,019 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,279 Pounds"

e.    AIRCRAFT #19, 21, 22, 23, 25 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF
      GALLEY WEIGHT CAPACITY INCREASE

      (i)   in section 1.a.2.1, the amount "11,949 Pounds (5,420 kg)" is deleted
            and replaced with "11,944 Pounds (5,418 kg)".

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                                 WEIGHT           WEIGHT
                                                                          (kg)             (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            605              1,332
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,805           26,024
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,361           27,250
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", item C shall be added
            with the following new provision at the end of such section:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>          <C>           <C>
         C) INTERIOR OPTIONAL ITEMS
         ------------------------------------------------------------------------------------------------------------
         New Galley Weight Capacity                                             Y            2.3            5.0
         ------------------------------------------------------------------------------------------------------------
                                               SUB-TOTAL (OPTIONS STD A/C)                   605           1,332
         ------------------------------------------------------------------------------------------------------------
</Table>

f.    AIRCRAFT #22 AND ALL SUBSEQUENT AIRCRAFT - NEW APU AIR INLET INSTALLATION

      (i)   in section 1.a.2.1, the amount "11,944 Pounds (5,418 kg)" is deleted
            and replaced with "11,943 Pounds (5,418 kg)".

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Page>

                                  CONFIDENTIAL

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                                 WEIGHT           WEIGHT
                                                                          (kg)             (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            605             1,333
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,805           26,025
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,361           27,251
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", section B shall be
            modified by added the following new provision at the end of such
            section:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                OPT       WEIGHT (kg)     WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                           <C>           <C>             <C>
         B) OPTIONS SYSTEM/OTHER EQUIPMENT
         ------------------------------------------------------------------------------------------------------------
         New APU Air Inlet Installation                                        Y            0.3              0.7
         ------------------------------------------------------------------------------------------------------------
                                              SUB-TOTAL (OPTIONS STD A/C)                   605             1,333
         ------------------------------------------------------------------------------------------------------------
</Table>

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,025 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,285 Pounds"

g.    AIRCRAFT #23 AND ALL SUBSEQUENT AIRCRAFT - STANDARD EXTERNAL PAINTING

      (i)   in section 1.a.2.1 and 1.a.2.3 will not be changed as there is no
            weight alteration;

      (ii)  in section 1.a.2.4, "Customer Options Table", section B shall be
            modified by changing the item "External Painting (with capability to
            be polished) as follows:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>         <C>            <C>
         B) OPTIONS SYSTEM/OTHER EQUIPMENT
         ------------------------------------------------------------------------------------------------------------
         Standard External Painting                                             Y           56.0           123.5
         ------------------------------------------------------------------------------------------------------------
</Table>

<Page>

                                  CONFIDENTIAL

h.    AIRCRAFT #26 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF VOR, AHRS H900 AND
      NEW CORROSION PREVENTION COMPONENT

      (i)   In section 1.a.2.1, the amount "11,943 Pounds (5,418 kg)" is deleted
            and replaced with "11,934 Pounds (5,413 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                                 WEIGHT           WEIGHT
                                                                          (kg)             (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            610             1,342
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,810           26,034
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,366           27,260
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", sections A and B shall
            be modified by added the following new provisions at the end of such
            section:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                OPT       WEIGHT (kg)     WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                            <C>          <C>             <C>
         A) OPTIONS TO STD AVIONIC CONFIGURATION
         ------------------------------------------------------------------------------------------------------------
         VOR system                                                            Y             -               -
         ------------------------------------------------------------------------------------------------------------
         AHRS H900 Honeywell system                                            Y             -               -
         ------------------------------------------------------------------------------------------------------------
           B) OPTIONS SYSTEM/OTHER EQUIPMENT
         ------------------------------------------------------------------------------------------------------------
         New Corrosion Prevention Component                                    Y            5.0             8.8
         ------------------------------------------------------------------------------------------------------------
                                              SUB-TOTAL (OPTIONS STD A/C)                   610            1,342
         ------------------------------------------------------------------------------------------------------------
</Table>

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,034 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,294 Pounds"

i.    AIRCRAFT #29 AND ALL SUBSEQUENT AIRCRAFT - IMPROVED OVERHEAD BINS

      (i)   In section 1.a.2.1, the amount "11,934 Pounds (5,413 kg)" is deleted
            and replaced with "11,949 Pounds (5,420 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Page>

                                  CONFIDENTIAL

<Table>
<Caption>
        ----------------------------------------------------------------------------------------------
                                   ITEMS                              WEIGHT (kg)         WEIGHT
                                                                                           (lb)
        ----------------------------------------------------------------------------------------------
<S>                                                                      <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                            603             1,327
        ----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                11,803           26,019
        ----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                12,359           27,245
        ----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", section C shall be
            modified by added the following new provision at the end of such
            section:

<Table>
<Caption>
         ------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)    WEIGHT (lb)
         ------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>          <C>            <C>
           C) INTERIOR OPTIONAL ITEMS
         ------------------------------------------------------------------------------------------------------------
         Improved Overhead bins                                                 Y           -7.0           -15.4
         ------------------------------------------------------------------------------------------------------------
                                               SUB-TOTAL (OPTIONS STD A/C)                   603           1,327
         ------------------------------------------------------------------------------------------------------------
</Table>

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,019 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,279 Pounds"

j.    AIRCRAFT #30 AND ALL SUBSEQUENT AIRCRAFT - INCLUSION OF NEW CARGO LINERS

      (i)   in section 1.a.2.1, the amount "11, 949 Pounds (5, 420 kg)" is
            deleted and replaced with "11, 944 Pounds (5, 418 kg)"

      (ii)  in section 1.a.2.3, "EMB-145 WEIGHT SUMMARY", items 2, 3, and 5
            shall be deleted and replaced with the following:

<Table>
<Caption>
        -----------------------------------------------------------------------------------------------
                                   ITEMS                                  WEIGHT           WEIGHT
                                                                           (kg)             (lb)
        -----------------------------------------------------------------------------------------------
<S>                                                                       <C>              <C>
        2 - Option to Std EMB-145 Aircraft (*)                               605            1,331
        -----------------------------------------------------------------------------------------------
        3 - M.E.W. Customer Configuration                                 11,805           26,023
        -----------------------------------------------------------------------------------------------
        5 - O.E.W. Customer Configuration                                 12,361           27,249
        -----------------------------------------------------------------------------------------------
</Table>

      (iii) in section 1.a.2.4, "Customer Options Table", item C shall be
            modified by added the following new provision at the end of each
            section, and the "SUBTOTAL" shall be modified as follows:

<Page>

                                  CONFIDENTIAL

<Table>
<Caption>
         --------------------------------------------------------------------------------------------------------------
         ITEMS                                                                 OPT       WEIGHT (kg)     WEIGHT (lb)
         --------------------------------------------------------------------------------------------------------------
<S>                                                                             <C>          <C>            <C>
         C) INTERIOR OPTIONAL ITEMS
         --------------------------------------------------------------------------------------------------------------
         New Cargo Liners                                                       Y             2              4.5
         --------------------------------------------------------------------------------------------------------------
                                               SUB-TOTAL (OPTIONS STD A/C)                   605            1,331
         --------------------------------------------------------------------------------------------------------------
</Table>

      (iv)  in section 1.a.3, "Weight" is hereby amended to read as follows:

                  "The manufacturer's empty weight (M.E.W.), for Customer
                  configuration, is guaranteed to be:

                          NOMINAL:       26,023 Pounds
                          TOLERANCE:        260 Pounds
                          GUARANTEE:     26,283 Pounds"

6.    MISCELLANEOUS: All other provisions of the Agreement which have not been
      specifically amended or modified by this Amendment No. 12 shall remain
      valid in full force and effect without any change.

         [The remainder of this page has been left blank intentionally.]

<Page>

IN WITNESS WHEREOF, EMBRAER and BUYER, by their duly authorized officers, have
entered into and executed this Amendment No. 12 to be effective as of the date
first written above.

EMBRAER - Empresa Brasileira de                  Solitair Corp.
Aeronautica S.A.

By  /s/ Frederico Fleury Curado                  By  /s/ Jay Maymudes
  -------------------------------                   ---------------------------
Name:  Frederico Fleury Curado                   Name:  Jay Maymudes
  -------------------------------                   ---------------------------

Title: E.V.P. Airline Market                     Title: V. P.
  -------------------------------                   ---------------------------

By  /s/ Flavio Rimoli                            Date: 10/22/01
  -------------------------------                   ---------------------------

Name:  Flavio Rimoli                             Place: Greenwich, CT
  -------------------------------                   ---------------------------

Title: Director of Contracts
  -------------------------------

Date:  10/22/2001
  -------------------------------

Place: Sao Jose dos Campos
  -------------------------------

<Page>

                   AIRCRAFT SPECIFIC CONFIGURATION, FINISHING
                             AND REGISTRATION MARKS

1.  STANDARD AIRCRAFT

     The Aircraft shall be manufactured according to the standard configuration
     specified in the Technical Description TD-145/010, dated January 1998
     (Appendix I) (the "Technical Description") and the optional equipment
     described in item 2 below.

2.  OPTIONAL EQUIPMENT

      2.1   OPTIONS TO THE STANDARD AVIONICS CONFIGURATION

            a)    CAT-II
            b)    2nd Radio Altimeter
            c)    2nd DME
            d)    2nd ADF
            e)    2nd Transponder Mode S
            f)    Selcal - Trimble
            g)    FMS/GPS - Honeywell
            h)    EGPWS
            i)    VHF (1st and 2nd) 8.33 khz spacing
            j)    Auxiliary Flight Data Acquisition Unit (AFDAU) (applicable for
                  Aircraft #11 and all subsequent Aircraft)
            k)    VOR system (applicable for Aircraft #26 and all subsequent
                  Aircraft)
            l)    AHRS H900 Honeywell system (applicable for Aircraft #26 and
                  all subsequent Aircraft)

      2.2   OPTIONAL SYSTEM / OTHER EQUIPMENT

            a)    Thrust Reversers
            b)    LR version
            c)    Cockpit Floodlight
            d)    Standard External Painting (for Aircraft #23 and all
                  subsequent Aircraft)
            e)    Service Door Sill Protection
            f)    Cargo Door Sill Protection
            g)    Cargo Door Light
            h)    Wiring provision on the panel lamps for Filament Test
            i)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            j)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            k)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            l)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            m)    Plug type passenger door
            n)    New Gust Lock System (applicable for Aircraft #10 and all
                  subsequent Aircraft)
            o)    Rolls Royce Allison AE3007A1P engines (1) (applicable for
                  Aircraft #16 and all subsequent Aircraft)
            p)    New APU Air Intake Net Installation (applicable for Aircraft
                  #22 and all subsequent Aircraft)

<Page>

            q)    New Corrosion Prevention component (applicable for Aircraft
                  #26 and all subsequent Aircraft)

      2.3   INTERIOR OPTIONAL ITEMS

            a)    Interior Option 1
            b)    Audio Entertainment (CD player)
            c)    2nd Attendant kit (include Handset/Cradle)
            d)    Blue Sterile Light
            e)    Baggage Compartment Class C
            f)    Passenger Seats - Customized Cushion Version Top w/
                  Ultra-leather
            g)    Baggage Restraint Net
            h)    Extra Oxygen Mask (3 mask for each double seat)
            i)    Next Generation Passenger seats (applicable for Aircraft #10
                  and all subsequent Aircraft)
            j)    New Galley Weight Capacity (applicable for Aircraft #19, 21,
                  22, 23, 25 and all subsequent Aircraft)
            k)    Improved Overhead Bins (applicable for Aircraft #29 and all
                  subsequent Aircraft)
            l)    New Cargo Liners (applicable for Aircraft #30 and all
                  subsequent Aircraft)
            m)    Emergency equipment items supplied by Buyer (applicable for
                  Aircraft #30 and all subsequent Aircraft):
                  n.1) PBE   119003   Puritan Bennett
                  n.2) PBE bracket   119063-01   Puritan Bennett
                  n.3) Smoke goggles   322-70   Scott Aviation
                  n.4) First aid kit   70004-00   Scott Aviation
                  n.5) Medical kit   4531   Medical Advisory Sys.
                  n.6) Fire ext. A352T   HRD Aero Sys
                  n.7) Fire ext. bracket   817   HRD Aero Sys

NOTES:

      (1)   Rolls Royce Allison AE3007A1P engines, only for Aircraft to be
            operated by Chautauqua Airlines, Inc..

3.    FINISHING

      a.    EXTERIOR FINISHING:

      The Aircraft shall be painted according to Buyer's or a Designated
      Operator's color and paint scheme which shall be supplied to Embraer by
      Buyer no later than six (6) months prior to the relevant Aircraft
      Contractual Delivery Date.

      b.    INTERIOR FINISHING:

            Buyer shall inform Embraer no later than seven (7) months prior to
            the relevant Aircraft Contractual Delivery Date of its choice of
            materials and colors of all and any item of interior finishing such
            as seat covers, carpet, floor lining on galley areas, side walls and
            overhead lining, galley lining

<Page>

            and curtain. The above mentioned schedule for definition of interior
            finishing shall only be applicable if Buyer selects its materials
            from the choices offered by and available at Embraer. In case Buyer
            elects to use different materials and or patterns, such schedule
            shall be agreed between the Parties at the time of signature of this
            Purchase Agreement.

      If Buyer does not supply Embraer with the information in the time period
      as described in Article 3.a and 3.b, the Aircraft will be produced and
      will be made available for Buyer's inspection in the same condition of
      exterior and interior finishing as the first Aircraft.

4.    REGISTRATION MARKS

      The Aircraft shall be delivered to Buyer with the registration marks
      painted on them, which shall be supplied to Embraer by Buyer no later than
      ninety (90) days before each relevant Aircraft Contractual Delivery Date.

IF THERE IS ANY CONFLICT BETWEEN THE TERMS OF THIS ATTACHMENT "A-1" AND THE
TERMS OF THE TECHNICAL DESCRIPTION, THE TERMS OF THIS ATTACHMENT "A-1" SHALL
PREVAIL.

<Page>

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

                   AIRCRAFT SPECIFIC CONFIGURATION, FINISHING
                             AND REGISTRATION MARKS

1.    STANDARD AIRCRAFT

      The Aircraft shall be manufactured according to the standard configuration
      specified in the Technical Description TD-145/010, dated January 1998
      (Appendix I) (the "Technical Description") and the optional equipment
      described in item 2 below.

2.    OPTIONAL EQUIPMENT

      2.1   OPTIONS TO THE STANDARD AVIONICS CONFIGURATION

            a)    CAT-II
            b)    2nd Radio Altimeter
            c)    2nd DME
            d)    2nd ADF
            e)    2nd Transponder Mode S
            f)    Selcal - Trimble
            g)    FMS/GPS - Honeywell
            h)    EGPWS
            i)    VHF (1st and 2nd) 8.33 khz spacing
            j)    Auxiliary Flight Data Acquisition Unit (AFDAU) (applicable for
                  Aircraft #11 and all subsequent Aircraft)
            k)    VOR system (applicable for Aircraft #26 and all subsequent
                  Aircraft)
            l)    AHRS H900 Honeywell system (applicable for Aircraft #26 and
                  all subsequent Aircraft)

      2.2 OPTIONAL SYSTEM / OTHER EQUIPMENT

            a)    Thrust Reversers
            b)    LR version
            c)    Cockpit Floodlight
            d)    Standard External Painting (for Aircraft #23 and all
                  subsequent Aircraft)
            e)    Service Door Sill Protection
            f)    Cargo Door Sill Protection
            g)    Cargo Door Light
            h)    Wiring provision on the panel lamps for Filament Test
            i)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            j)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            k)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            l)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            m)    Standard door
            n)    New Gust Lock System (applicable for Aircraft #10 and all
                  subsequent Aircraft)
            o)    Rolls Royce Allison AE3007A1P engines (1) (applicable for
                  Aircraft #16 and all subsequent Aircraft)
            p)    New APU Air Intake Net Installation (applicable for Aircraft
                  #22 and all subsequent Aircraft)

<Page>

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

            q)    New Corrosion Prevention component (applicable for Aircraft
                  #26 and all subsequent Aircraft)

      2.3   INTERIOR OPTIONAL ITEMS

            a)    Interior Option 1
            b)    Audio Entertainment (CD player)
            c)    2nd Attendant kit (include Handset/Cradle)
            d)    Blue Sterile Light
            e)    Baggage Compartment Class C
            f)    Standard main door with structural provisions for plug type
                  door
            g)    Passenger Seats - Customized Cushion Version Top w/
                  Ultra-leather
            h)    Baggage Restraint Net
            i)    Extra Oxygen Mask (3 mask for each double seat)
            j)    Next Generation Passenger seats (applicable for Aircraft #10
                  and all subsequent Aircraft)
            k)    New Galley Weight Capacity (applicable for Aircraft #19, 21,
                  22, 23, 25 and all subsequent Aircraft)
            l)    Improved Overhead Bins (applicable for Aircraft #29 and all
                  subsequent Aircraft)
            m)    New Cargo Liners (applicable for Aircraft #30 and all
                  subsequent Aircraft)
            n)    Emergency equipment items supplied by Buyer (applicable for
                  Aircraft #30 and all subsequent Aircraft):
                  n.1) PBE 119003 Puritan Bennett
                  n.2) PBE bracket 119063-01 Puritan Bennett
                  n.3) Smoke goggles 322-70 Scott Aviation
                  n.4) First aid kit 70004-00 Scott Aviation
                  n.5) Medical kit 4531 Medical Advisory Sys.
                  n.6) Fire ext. A352T HRD Aero Sys
                  n.7) Fire ext. bracket 817 HRD Aero Sys

            NOTES:

      (1)   Rolls Royce Allison AE3007A1P engines, only to Aircraft to be
            operated by Chautauqua Airlines, Inc..

3.    FINISHING

      a.    EXTERIOR FINISHING:

            The Aircraft shall be painted according to Buyer's or a Designated
            Operator's color and paint scheme which shall be supplied to Embraer
            by

      Buyer no later than six (6) months prior to the relevant Aircraft
      Contractual Delivery Date.

      b.    INTERIOR FINISHING:

            Buyer shall inform Embraer no later than seven (7) months prior to
            the relevant Aircraft Contractual Delivery Date of its choice of
            materials and colors of all and any item of interior finishing such
            as seat covers, carpet,

<Page>

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

            floor lining on galley areas, side walls and overhead lining, galley
            lining and curtain. The above mentioned schedule for definition of
            interior finishing shall only be applicable if Buyer selects its
            materials from the choices offered by and available at Embraer. In
            case Buyer elects to use different materials and or patterns, such
            schedule shall be agreed between the Parties at the time of
            signature of this Purchase Agreement.

      If Buyer does not supply Embraer with the information in the time period
      as described in Article 3.a and 3.b, the Aircraft will be produced and
      will be made available for Buyer's inspection in the same condition of
      exterior and interior finishing as the first Aircraft.

4.    REGISTRATION MARKS

      The Aircraft shall be delivered to Buyer with the registration marks
      painted on them, which shall be supplied to Embraer by Buyer no later than
      ninety (90) days before each relevant Aircraft Contractual Delivery Date.

IF THERE IS ANY CONFLICT BETWEEN THE TERMS OF THIS ATTACHMENT "A-2" AND THE
TERMS OF THE TECHNICAL DESCRIPTION, THE TERMS OF THIS ATTACHMENT "A-2" SHALL
PREVAIL.

<Page>

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

                   AIRCRAFT SPECIFIC CONFIGURATION, FINISHING
                             AND REGISTRATION MARKS

1.    STANDARD AIRCRAFT

      The Aircraft shall be manufactured according to the standard configuration
      specified in the Technical Description TD-145/010, dated January 1998
      (Appendix I) (the "Technical Description") and the optional equipment
      described in item 2 below.

2.    OPTIONAL EQUIPMENT

      2.1   OPTIONS TO THE STANDARD AVIONICS CONFIGURATION

            a)    CAT-II
            b)    2nd Radio Altimeter
            c)    2nd DME
            d)    2nd ADF
            e)    2nd Transponder Mode S
            f)    Selcal - Trimble
            g)    FMS/GPS - Honeywell
            h)    EGPWS
            i)    VHF (1st and 2nd) 8.33 khz spacing
            j)    Auxiliary Flight Data Acquisition Unit (AFDAU) (applicable for
                  Aircraft #11 and all subsequent Aircraft)
            k)    VOR system (applicable for Aircraft #26 and all subsequent
                  Aircraft)
            l)    AHRS H900 Honeywell system (applicable for Aircraft #26 and
                  all subsequent Aircraft)

      2.2   OPTIONAL SYSTEM / OTHER EQUIPMENT

            a)    Thrust Reversers
            b)    LR version
            c)    Cockpit Floodlight
            d)    Standard External Painting (for Aircraft #23 and all
                  subsequent Aircraft)
            e)    Service Door Sill Protection
            f)    Cargo Door Sill Protection
            g)    Cargo Door Light
            h)    Wiring provision on the panel lamps for Filament Test
            i)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            j)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            k)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft)
            l)    Intentionally deled (for Aircraft #18 and all subsequent
                  Aircraft) Standard door
            m)    New Gust Lock System (applicable for Aircraft #10 and all
                  subsequent Aircraft)
            n)    Rolls Royce Allison AE3007A1P engines (1) (applicable for
                  Aircraft #16 and all subsequent Aircraft)
            o)    New APU Air Intake Net Installation (applicable for Aircraft
                  #22 and all subsequent Aircraft)
            p)    New Corrosion Prevention component (applicable for Aircraft
                  #26 and all subsequent Aircraft)

<Page>

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

      2.3   INTERIOR OPTIONAL ITEMS

            a)    Interior Option 1
            b)    Audio Entertainment (CD player)
            c)    Aft Attendant Handset/Cradle
            d)    Blue Sterile Light
            e)    Baggage Compartment Class C
            f)    Standard main door with structural provisions for plug type
                  door
            g)    Passenger Seats - Customized Cushion Version Top w/
                  Ultra-leather
            h)    Baggage Restraint Net
            i)    Extra Oxygen Mask (3 mask for each double seat)
            j)    Next Generation Passenger seats (applicable for Aircraft #10
                  and all subsequent Aircraft)
            k)    New Galley Weight Capacity (applicable for Aircraft #19, 21,
                  22, 23, 25 and all subsequent Aircraft)
            l)    Improved Overhead Bins (applicable for Aircraft #29 and all
                  subsequent Aircraft)
            m)    New Cargo Liners (applicable for Aircraft #30 and all
                  subsequent Aircraft)
            n)    Emergency equipment items supplied by Buyer (applicable for
                  Aircraft #30 and all subsequent Aircraft): n.1) PBE 119003
                  Puritan Bennett
                  n.2) PBE bracket 119063-01 Puritan Bennett
                  n.3) Smoke goggles 322-70 Scott Aviation
                  n.4) First aid kit 70004-00 Scott Aviation
                  n.5) Medical kit 4531 Medical Advisory Sys.
                  n.6) Fire ext. A352T HRD Aero Sys
                  n.7) Fire ext. bracket 817 HRD Aero Sys

NOTES:

(1)   Rolls Royce Allison AE3007A1P engines, only for Aircraft to be operated by
      Chautauqua Airlines, Inc..

3.    FINISHING

      a.    EXTERIOR FINISHING:

      The Aircraft shall be painted according to Buyer's or a Designated
      Operator's color and paint scheme which shall be supplied to Embraer by
      Buyer no later than six (6) months prior to the relevant Aircraft
      Contractual Delivery Date.

      b.    INTERIOR FINISHING:

            Buyer shall inform Embraer no later than seven (7) months prior to
            the relevant Aircraft Contractual Delivery Date of its choice of
            materials and colors of all and any item of interior finishing such
            as seat covers, carpet, floor lining on galley areas, side walls and
            overhead lining, galley lining and curtain. The above mentioned
            schedule for definition of interior finishing shall only be
            applicable if Buyer selects its materials from the choices offered
            by and available at Embraer. In case Buyer elects to use

<Page>

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

            different materials and or patterns, such schedule shall be agreed
            between the Parties at the time of signature of this Purchase
            Agreement.

      If Buyer does not supply Embraer with the information in the time period
      as described in Article 3.a and 3.b, the Aircraft will be produced and
      will be made available for Buyer's inspection in the same condition of
      exterior and interior finishing as the first Aircraft.

4.    REGISTRATION MARKS

      The Aircraft shall be delivered to Buyer with the registration marks
      painted on them, which shall be supplied to Embraer by Buyer no later than
      ninety (90) days before each relevant Aircraft Contractual Delivery Date.

IF THERE IS ANY CONFLICT BETWEEN THE TERMS OF THIS ATTACHMENT "A-3" AND THE
TERMS OF THE TECHNICAL DESCRIPTION, THE TERMS OF THIS ATTACHMENT "A-3" SHALL
PREVAIL.<Page>

                                                                Exhibit 10.13(m)

              AMENDMENT NUMBER 13 TO PURCHASE AGREEMENT GCT-025/98

This Amendment Number 13 to Purchase Agreement GCT-025/98, dated as of October
__, 2001 ("Amendment No. 13") relates to the Purchase Agreement GCT-025/98 (the
"Purchase Agreement") between EMBRAER - Empresa Brasileira de Aeronautica S.A.
("Embraer") and Solitair Corp. ("Buyer") dated June 17, 1998 as amended from
time to time (collectively referred to herein as "Agreement"). This Amendment
No. 13 is between Embraer and Buyer, collectively referred to herein as the
"Parties".

This Amendment No. 13 sets forth additional agreements between Embraer and Buyer
relative to the conversion of EMB-145 Aircraft into EMB-140 Aircraft (as defined
below), configuration changes for the EMB-140 Aircraft in order to comply with
the American Eagle ("AMR Eagle") configuration, and the Performance Guarantee
for the EMB-140 Aircraft, a change the name of Wexford Management LLC to Wexford
Capital LLC, and changes on the delivery schedule and Buyer's exercise of Option
Aircraft.

Except as otherwise provided for herein all terms of the Purchase Agreement
shall remain in full force and effect. All capitalized terms used in this
Amendment No. 13, which are not defined herein shall have the meaning given in
the Purchase Agreement. In the event of any conflict between this Amendment No.
13 and the Purchase Agreement the terms, conditions and provisions of this
Amendment No. 13 shall control.

WHEREAS, in connection with the Parties' agreements as described above, the
Parties have agreed to amend the Purchase Agreement as provided for below:

NOW, THEREFORE, for good and valuable consideration which is hereby acknowledged
Embraer and Buyer hereby agree as follows:

1.    DEFINITIONS:

1.1   Article "1.b" shall be deleted and replaced with the following:

      "b.   Aircraft - shall mean the EMB-145 Aircraft and/or the EMB-140
            Aircraft."

1.2   New Articles "1.b.1" and "1.b.2" shall be included as follows:

      "b.1. EMB-145 Aircraft - shall mean the EMB-145 LR Firm Aircraft and
            Option Aircraft or, where there is more than one of such Aircraft,
            each of such Aircraft, manufactured by Embraer, for sale to Buyer
            pursuant to this Agreement, according to the Technical Description
            number TD-145/010, dated January 1998 (Appendix I), the Aircraft
            Specific Configuration, Finishing and Registration Marks described
            in Attachments 'A-1', 'A-2' and 'A-3', as applicable, and as may be
            amended from time to time by Buyer at its expense as specified in
            Article 11. The Aircraft is composed entirely of vendor parts and
            parts manufactured by

<Page>

            Embraer and Embraer subcontractors, and the parts manufactured by
            Embraer and Embraer subcontractors shall have Embraer part numbers.

      b.2.  EMB-140 Aircraft - shall mean the EMB-145, Model EMB-135 KL version
            Firm Aircraft and New Option Aircraft, or, where there is more than
            one of such Aircraft, each of such Aircraft, manufactured by
            Embraer, for sale to Buyer pursuant to this Agreement, according to
            Technical Description TD-140/002, dated April 2000, the Aircraft
            Specific Configuration, Finishing and Registration Marks described
            in Attachment 'A-4' as may be amended from time to time by Buyer at
            its expense as specified in Article 11. The Aircraft is composed
            entirely of vendor parts and parts manufactured by Embraer and
            Embraer subcontractors, and the parts manufactured by Embraer and
            Embraer subcontractors shall have Embraer part numbers."

2.    SUBJECT: Article "2.a" shall be deleted and replaced with the following:

      "a.   Embraer shall sell and Buyer shall purchase and take delivery of
            forty five (45) firm Aircraft ("Firm Aircraft"), and if Buyer so
            elects, up to twenty-eight (28) option Aircraft ("Option Aircraft"),
            upon the terms and conditions of this Agreement. Such Aircraft
            quantity distribution shall be as follows:

            a.1   Firm Aircraft: Thirty eight (38) EMB-145 Aircraft and seven
                  (7) EMB-140 Aircraft (also referred to as Aircraft #1 - #45);

            a.2   Option Aircraft: eight (8) EMB-140 Aircraft and twenty (20)
                  EMB-145 Aircraft (also referred to as Aircraft #46 - #73)."

3.    PRICE: Article "3.a.1" shall be deleted and replaced with the following:

      "1.   The per unit Aircraft Basic Prices for the Firm Aircraft shall be:

<Table>
<Caption>
--------------------------------------------------------------------------------
                                  Firm Aircraft
--------------------------------------------------------------------------------
       "EMB-145 Aircraft #                 Aircraft Basic Price
--------------------------------------------------------------------------------
<S>                           <C>
            11 to 15          Such Aircraft have already been delivered for [*]
--------------------------------------------------------------------------------
            16 and 17         Such Aircraft have already been delivered for [*]
--------------------------------------------------------------------------------
             18 and 22        Such Aircraft have already been delivered for [*]
--------------------------------------------------------------------------------
             23 to 27         Such Aircraft have already been delivered for [*]
--------------------------------------------------------------------------------
</Table>

----------
* Confidential
<Page>

--------------------------------------------------------------------------------
            28 and 29         Such Aircraft have already been delivered for a
                              Basic Price of US$16,796,182 (sixteen million,
                              seven hundred ninety six thousand, one hundred
                              eighty two United States dollars) in January 2000
                              economic conditions.
--------------------------------------------------------------------------------
      30 and all subsequent   US$16,794,145 (sixteen million, seven hundred
         EMB-145 Aircraft     ninety four thousand, one hundred forty five
                              United States dollars) in January 2000 economic
                              conditions."
--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
    EMB-140 Aircraft #                    Aircraft Basic Price
--------------------------------------------------------------------------------
      All EMB-140             [*]
        Aircraft
--------------------------------------------------------------------------------

4.    DELIVERY SCHEDULE: The delivery schedule contained in Article "5.a" shall
      be deleted and replaced with the following:

      "

<Table>
<Caption>
     ------------------------------------------------------------------------------------------------------------------
        A/C #          AIRCRAFT         DELIVERY MONTH          A/C #           AIRCRAFT            DELIVERY MONTH
     ------------------------------------------------------------------------------------------------------------------
<S>                    <C>                 <C>                   <C>            <C>                    <C>
          01           EMB-145             Apr-99*               24             EMB-145                Apr-01*
     ------------------------------------------------------------------------------------------------------------------
          02           EMB-145             Jun-99*               25             EMB-145                Apr-01*
     ------------------------------------------------------------------------------------------------------------------
          03           EMB-145             Aug-99*               26             EMB-145                May-01*
     ------------------------------------------------------------------------------------------------------------------
          04           EMB-145             Nov-99*               27             EMB-145                May-01*
     ------------------------------------------------------------------------------------------------------------------
          05           EMB-145             Jan-00*               28             EMB-145                Jun-01*
     ------------------------------------------------------------------------------------------------------------------
          06           EMB-145             Feb-00*               29             EMB-145                Jun-01*
     ------------------------------------------------------------------------------------------------------------------
          07           EMB-145             Mar-00*               30             EMB-145                Jul-01*
     ------------------------------------------------------------------------------------------------------------------
          08           EMB-145             May-00*               31             EMB-145                Jul-01*
     ------------------------------------------------------------------------------------------------------------------
          09           EMB-145             Jun-00*               32             EMB-145                Aug-01*
     ------------------------------------------------------------------------------------------------------------------
          10           EMB-145             Jul-00*               33             EMB-145                Aug-01*
     ------------------------------------------------------------------------------------------------------------------
          11           EMB-145             Aug-00*               34             EMB-145                Sep-01*
     ------------------------------------------------------------------------------------------------------------------
          12           EMB-145             Aug-00*               35             EMB-145                Sep-01*
     ------------------------------------------------------------------------------------------------------------------
          13           EMB-145             Sep-00*               36             EMB-140               22 Oct-01
     ------------------------------------------------------------------------------------------------------------------
          14           EMB-145             Oct-00*               37             EMB-145               20 Dec-01
     ------------------------------------------------------------------------------------------------------------------
          15           EMB-145             Nov-00*               38             EMB-140               24 Oct-01
     ------------------------------------------------------------------------------------------------------------------
          16           EMB-145             Nov-00*               39             EMB-145               26 Oct-01
     ------------------------------------------------------------------------------------------------------------------
          17           EMB-145             Dec-00*               40             EMB-140               26 Nov-01
     ------------------------------------------------------------------------------------------------------------------
          18           EMB-145             Dec-00*               41             EMB-145               14 Nov-01
     ------------------------------------------------------------------------------------------------------------------
          19           EMB-145             Jan-01*               42             EMB-140               29 Nov-01
     ------------------------------------------------------------------------------------------------------------------
          20           EMB-145             Jan-01*               43             EMB-140               10 Dec-01
     ------------------------------------------------------------------------------------------------------------------
          21           EMB-145             Jan-01*               44             EMB-140               14 Dec-01
     ------------------------------------------------------------------------------------------------------------------
          22           EMB-145             Feb-01*               45             EMB-140               19 Dec-01
     ------------------------------------------------------------------------------------------------------------------
          23           EMB-145             Mar-01*
     -------------------------------------------------
</Table>

      REMARKS: * Delivered to Buyer as of the date hereof.

-----------
* Confidential
<Page>

5.    CERTIFICATION: The first line of Article "6" shall be deleted and replaced
      with the following:

            "On the Actual Delivery Date of Aircraft, the EMB-145 and EMB-140
            Aircraft shall have valid and effective type certificates issued by
            the CTA and FAA."

6.    OPTION AIRCRAFT:

6.1   The first paragraph, delivery table, and second paragraph in Article "24"
      shall be deleted and replaced with the following:

      "Buyer shall have the option to purchase the Option Aircraft, to be
      delivered in accordance with the chart below, subject to the terms and
      conditions of this Article:

<Table>
<Caption>
      --------------------------------------------------------------------------------------------------------------
                                                     OPTION AIRCRAFT
      --------------------------------------------------------------------------------------------------------------
        A/C #        AIRCRAFT           DELIVERY MONTH         A/C #          AIRCRAFT           DELIVERY MONTH
      --------------------------------------------------------------------------------------------------------------
<S>                  <C>                   <C>                  <C>           <C>                    <C>
          01         EMB-140               Jul 02               15            EMB-145                Feb 03
      --------------------------------------------------------------------------------------------------------------
          02         EMB-140               Jul 02               16            EMB-145                Feb 03
      --------------------------------------------------------------------------------------------------------------
          03         EMB-140               Aug 02               17            EMB-145                Mar 03
      --------------------------------------------------------------------------------------------------------------
          04         EMB-140               Aug 02               18            EMB-145                Mar 03
      --------------------------------------------------------------------------------------------------------------
          05         EMB-140               Sep 02               19            EMB-145                Apr 03
      --------------------------------------------------------------------------------------------------------------
          06         EMB-140               Sep 02               20            EMB-145                Apr 03
      --------------------------------------------------------------------------------------------------------------
          07         EMB-140               Oct 02               21            EMB-145                May 03
      --------------------------------------------------------------------------------------------------------------
          08         EMB-140               Oct 02               22            EMB-145                May 03
      --------------------------------------------------------------------------------------------------------------
          09         EMB-145               Nov 02               23            EMB-145                Jun 03
      --------------------------------------------------------------------------------------------------------------
          10         EMB-145               Nov 02               24            EMB-145                Jun 03
      --------------------------------------------------------------------------------------------------------------
          11         EMB-145               Dec 02               25            EMB-145                Jul 03
      --------------------------------------------------------------------------------------------------------------
          12         EMB-145               Dec 02               26            EMB-145                Jul 03
      --------------------------------------------------------------------------------------------------------------
          13         EMB-145               Jan 03               27            EMB-145                Aug 03
      --------------------------------------------------------------------------------------------------------------
          14         EMB-145               Jan 03               28            EMB-145                Aug 03
      --------------------------------------------------------------------------------------------------------------
</Table>

            "

6.2.  Article "24.a" shall be deleted and replaced with the following:

      "a.   INITIAL DEPOSIT: A refundable deposit of [*] is due and payable
            immediately after signature of this Amendment No. 13 and the
            outstanding amount already paid [*]), regarding initial deposits
            for the Option Aircraft shall be returned to Buyer promptly after
            signature of this Amendment No. 13, and the interest on the initial
            deposits of the cancelled Option Aircraft shall be paid in
            accordance with Article "24.f" to the Purchase Agreement. Interest
            on the [*] returned portion of each non-cancelled Option Aircraft
            deposit shall be due only if Buyer cancels such Option Aircraft. In
            that case, Embraer shall pay [*] amount of the original Initial
            Deposits for each such Option Aircraft in accordance with
            Article "24.f" to the Purchase Agreement, provided that interest

---------
* Confidential
<Page>

            shall stop accruing on the previously returned [*] as of the
            date Embraer returned such amount to Buyer."

6.3.  Article "24.b" shall be deleted and replaced with the following, as
      applicable:

      "b.   [*], provided that such Option Aircraft be delivered to Buyer in
            accordance with the chart above and in the same configuration,
            specification and installations specified in Attachments 'A-1',
            'A-2' and 'A-3', as such attachment is written on the date of
            signature of this Amendment No. 13 unless otherwise modified by
            the Parties and the costs for such changes shall be in addition
            to the Basic Price."

      b.1   [*] provided that such Option Aircraft be delivered to Buyer in
            accordance with the chart above and in the same configuration,
            specification and installations specified in Attachment "A-4",
            as such attachment is written on the date of signature of this
            Amendment No. 13 unless otherwise modified by the Parties and
            the costs for such changes shall be in addition to the
            Basic Price"

6.4.  Article "24.d" shall be deleted and replaced with the following:

      "d.   DEPOSIT AND PROGRESS PAYMENTS: The payment of the price specified in
            item "b" above, shall be made according to the following:

            1.    The initial deposit of [*] to be made by Buyer according to
                  Article 24.a., shall apply toward the price of the relevant
                  Option Aircraft.

            2.    A progress payment of [*] of the unit basic price defined in
                  item "b" above, per exercised Option Aircraft, less the
                  initial deposit of [*] per exercised Option Aircraft is due
                  and payable [*] prior to each exercised Option Aircraft
                  contractual delivery date.

            3.    A progress payment of [*] item "b" above is due and payable
                  [*] prior to each relevant exercised Option Aircraft
                  contractual delivery date.

            4.    A progress payment of [*] of the unit basic price defined
                  in item "b" above is due and payable [*]

            5.    The balance of each exercised Option Aircraft escalated price
                  is due and

----------
* Confidential
<Page>

                  payable upon acceptance of each relevant Aircraft by Buyer.

      6.5.  Article "24.e" shall be deleted and replaced with the following:

      "e.   CONFIRMATION OF OPTION GROUPS: The Option Groups (of two Aircraft
            each) shall be confirmed on or before the following dates:

                  First 4 Option Groups [*]
                  Next 4 Option Groups [*]
                  Next 2 Option Groups [*]
                  Next 2 Option Groups [*]
                  Last 2 Option Groups [*]

      At the time of each such confirmation, the Initial Deposit with respect to
      the Option Aircraft in such Option Group shall become non refundable. In
      the event that Buyer fails to exercise its option with respect to any five
      (5) Option Groups, Buyer shall lose its rights to said Option Groups, as
      well as all remaining Option Groups."

7.    ATTACHMENT A - CONFIGURATION CHANGES: Attachment A-4 to this Amendment
      No.13 shall be included in the Purchase Agreement, reflecting the
      configuration selected by Buyer for the EMB-140 Aircraft (to be delivered
      under the AMR Eagle configuration).

8.    ATTACHMENT B:

8.1.  On item 2.0 of Section 2 to Attachment B, the reference to "EMB-145
      Aircraft" shall be deleted and replaced with "EMB-145 and EMB-140
      Aircraft".

8.2   EMB-140 Additional Technical Publications: The following operational and
      technical publications to the EMB-140 Aircraft shall be supplied at no
      cost to Buyer and a new item 3.1 shall be included to the Attachment "B"
      to the Purchase Agreement as follows:

            "3.1. LIST OF PUBLICATIONS (EMB-140 Aircraft)

            As provided for in Article 15 of this Agreement, the technical
            publications covering operation and maintenance for the EMB-140
            Aircraft shall be delivered to Buyer in accordance with the
            following list:

<Table>
<Caption>
                                                                   QTY
       TITLE                                                    (COPIES)
       -----                                                    --------
<S>                                                                  <C>
       OPERATIONAL

1. Airplane Flight Manual (AFM)(*)                                  [*]
</Table>

--------
* Confidential
<Page>

<Table>
<S>                                                                  <C>
2. Quick Reference Handbook (QRH)(*)                                 [*]
3. Supplementary Performance Manual (SPM)(*)                         [*]

       MAINTENANCE
4. Aircraft Maintenance Manual (AMM)                                 [*]
5. Illustrated Parts Catalog (IPC)                                   [*]
6. Wiring Manual (WM)                                                [*]

          MAINTENANCE SUPPLEMENTARY SET
7. System Schematic Manual (SSM)                                     [*]
</Table>

            (*)   One extra copy on board each Aircraft

If Buyer elects not to take all or any one of the publications above mentioned,
or revisions thereof, no refund or other financial adjustment of the Basic Price
will be made since such publications are offered at no cost to Buyer as referred
to in Article 15.a of the Purchase Agreement.

10.   ATTACHMENTS C, D, E, F, G AND I: All references to "EMB-145 Aircraft" on
      Attachments C, D, E, F, G and I to Purchase Agreement shall be deleted and
      replaced by "EMB-145 or EMB-140 Aircraft".

11.   ATTACHMENT H AND NOTICES: All references to "Wexford Management LLC" on
      Attachment H and Notices to Purchase Agreement shall be deleted and
      replaced by "Wexford Capital LLC".

12.   PERFORMANCE GUARANTEE FOR EMB-140 AIRCRAFT IN AMR EAGLE CONFIGURATION:
      Attachment J-1 to this Amendment No.13 shall be included in the Purchase
      Agreement, reflecting the Performance Guarantee for the EMB-140 Aircraft
      to be delivered under the AMR Eagle configuration.

13.   MISCELLANEOUS: All other provisions of the Agreement which have not been
      specifically amended or modified by this Amendment No. 13 shall remain
      valid in full force and effect without any change.

         [The remainder of this page has been left blank intentionally.]

----------
* Confidential
<Page>

IN WITNESS WHEREOF, EMBRAER and BUYER, by their duly authorized officers, have
entered into and executed this Amendment No. 13 to be effective as of the date
first written above.

EMBRAER - Empresa Brasileira de              Solitair Corp.
Aeronautica S.A.

By  /s/ Frederico Fleury Curado                  By  /s/ Jay Maymudes
   ----------------------------                     ---------------------------

Name:  Frederico Fleury Curado                   Name: Jay Maymudes
       ------------------------                        ------------------------

Title: E.V.P. Airline Market                     Title: V.P.
       ------------------------                        ------------------------

By  /s/ Flavio Rimoli                            Date:  10/22/01
    ---------------------------                        ------------------------

Name: Flavio Rimoli                              Place: Greenwich, CT
      -------------------------                         -----------------------

Title: Director of Contracts
       ------------------------

Date:  10/22/2001
       ------------------------

Place: Sao Jose dos Campos
       ------------------------

<Page>

                                ATTACHMENT "A-4"
                            EMB-140 AIRCRAFT UNDER

                 AIRCRAFT SPECIFIC CONFIGURATION, FINISHING AND
                               REGISTRATION MARKS

1.    STANDARD 140 AIRCRAFT

      The Aircraft shall be manufactured according to the standard configuration
      specified in Embraer's Technical Description TD-140/002 dated as of April
      2000, Type Certification FAA, and including the following optional items:

2.    OPTIONAL EQUIPMENT:

      2.1   OPTIONS TO STANDARD AVIONICS CONFIGURATION
            a)    CAT II
            b)    2nd DME
            c)    2nd ADF
            d)    2nd Transponder Mode S
            e)    Weather Radar with Independent Selection
            f)    3rd VHF with 25 KHz spacing
            g)    Dual FMS+GPS (Universal)
            h)    ACARS (Unilink)
            i)    Printer
            j)    AFDAU
            k)    Single Potentiometer to control FA volume

      2.2   OPTIONAL SYSTEM/OTHER EQUIPMENT
            a)    Thrust Reversers
            b)    APU Silencer
            c)    Cockpit Floodlight
            d)    External Painting with capability to be polished
            e)    LR Version
            f)    Service Door Sill Protection
            g)    Baggage Door Sill Protection
            h)    Baggage Door Light
            i)    Optional Main Door (without steps)
            j)    Floor Covering in Cargo Compartment - GE Lexan
            k)    Provisions for Antenna for In-Flight Phone (antenna to be
                  provided as loose item)
            l)    Steering Disengage Outside Cockpit

<Page>

      2.3   INTERIOR OPTIONAL ITEMS

            a)    Interior Option 3
            b)    Audio Entertainment
            c)    Aft Hand Set & Cradle
            d)    Blue Sterile Light
            e)    3rd Oxygen Mask on RH
            f)    Passenger Seats Customized (P/N140-86006-401 seat installation
                  kit)
            g)    Baggage Restraint Net
            h)    Vertical Baggage Barrier Net
            i)    Provisions for Defibrillator
            j)    Emergency equipment items supplied by Buyer (BFE);
                  j.1) PBE 119003 Puritan Bennett
                  j.2) PBE brackets 119063-01 Puritan Bennett
                  j.3) Smoke goggles 322-70 Scott Aviation
                  j.4) First Aid kit 70004-00 Scott Aviation
                  j.5) Medical kit 4531 Medical Advisory Sys
                  j.6) Fire Extinguisher A352T HRD Aero Sys
                  j.7) Fire extinguisher bracket 817 HRD Aero Sys.

3.    FINISHING

      a.    EXTERIOR FINISHING:

            The Aircraft shall be painted according to Buyer's color and paint
            scheme which shall be supplied to Embraer by Buyer on or before six
            (6) months prior to the relevant Aircraft Contractual Delivery Date.

      b.    INTERIOR FINISHING:

            Buyer shall inform Embraer on or before eight (8) months prior to
            the relevant Aircraft Contractual Delivery Date of its choice of
            materials and colors of all and any item of interior finishing such
            as seat covers, carpet, floor lining on galley areas, side walls and
            overhead lining, galley lining and curtain. The above mentioned
            schedule for definition of interior finishing shall only be
            applicable if Buyer selects its materials from the choices offered
            by and available at Embraer. If Buyer opts to use different
            materials and or patterns, such schedule shall be agreed between the
            Parties at the time of signature of this Purchase Agreement.

4.    REGISTRATION MARKS

<Page>

      The Aircraft shall be delivered to Buyer with the registration marks
      painted on them, which shall be supplied to Embraer by Buyer no later than
      ninety (90) days before each relevant Aircraft Contractual Delivery Date.

IF THERE IS ANY CONFLICT BETWEEN THE TERMS OF THIS ATTACHMENT "A-4" AND THE
TERMS OF THE TECHNICAL DESCRIPTION TD-140/002, DATED APRIL 2000, THE TERMS OF
THIS ATTACHMENT "A-4" SHALL PREVAIL.

<Page>

                                 ATTACHMENT J-1
--------------------------------------------------------------------------------

                    EMB 140 - AIRCRAFT PERFORMANCE GUARANTEE

ATTACHMENT "J-1" - AIRCRAFT PERFORMANCE GUARANTEE

1.    GUARANTEES

      Embraer, subject to the conditions and limitations hereby expressed, and
      considering the Aircraft with a maximum takeoff weight of 46,517 pounds
      (21,100 kg) and equipped with EMBRAER furnished Rolls-Royce Allison AE
      3007A1/3 engines, guarantees each Aircraft as follows:

      a.    On the Aircraft Actual Delivery Date, the Aircraft will comply with
            the following performance:

            a.1   CRUISE SPECIFIC AIR RANGE

                        The cruise specific air range at a gross weight of
                        40,000 pounds (18,144 Kg) in a standard day (ISA), at an
                        altitude of 35,000 feet, at 440 KTAS using not more than
                        maximum cruise thrust, shall not be less than the
                        guarantee value:

                        NOMINAL:      .182  NAM/Pound
                        TOLERANCE:  - .006  NAM/Pound
                        GUARANTEE:    .176  NAM/Pound

            a.2   MISSION PAYLOAD

                  a.2.1 The payload for a stage length of 1000 nautical miles in
                        still air, shall not be less than the guarantee value:

                        GUARANTEE:   10,506 Pounds (4,765 kg)

      Note: The above guaranteed value is subject to the same tolerance
      applicable to the MEW pursuant to Paragraph a.3 below.

                        The above guarantee is based on the following conditions
                        and operating rules:

                        Stage Length:
                        The stage is defined as the sum of the distances for
                        length climb, cruise and descent.

<Page>

                        Takeoff:
                        The airport altitude is at SEA LEVEL.
                        The takeoff weight is not limited by the airport
                        conditions.
                        Maximum takeoff thrust is used for the takeoff.

                        Climbout Maneuver:
                        Following the takeoff to 35 feet, the EMB-140 Aircraft
                        accelerates to 245 KCAS while climbing to 1,500 feet
                        above the departure airport altitude and retracting
                        flaps and landing gear.

                        Climb:
                        The EMB-140 Aircraft climbs from 1,500 feet above the
                        departure airport altitude to 10,000 feet altitude at
                        245 KCAS.
                        The EMB-140 Aircraft then accelerates to a speed of 270
                        KCAS.
                        The climb continues at 270 KCAS until 16,000 feet is
                        reached.
                        The climb continues at 0.56 Mach number to cruise
                        altitude.
                        The temperature is ISA during the climb.
                        Maximum climb thrust is used throughout the climb.

                        Cruise:
                        The EMB-140 Aircraft cruises at an average speed of 0.76
                        Mach number.
                        The cruise altitude is 37,000 feet. The temperature is
                        ISA during cruise.
                        The cruise thrust is not to exceed maximum cruise
                        thrust.

                        Descent:
                        The EMB-140 Aircraft descends from the cruise altitude
                        at 250 KCAS.
                        The descent continues at 250 KCAS to an altitude of
                        1,500 feet.
                        The temperature is ISA during descent.

                        Approach and Landing Maneuver:
                        The EMB-140 Aircraft decelerates to the final approach
                        speed while extending landing gear and flaps, then
                        descends and lands.
                        The destination airport elevation is at sea level.

                        Fixed Allowances:
                        For the purpose of this guarantee and for the purpose of
                        establishing compliance with this guarantee, the
                        following shall be used as fixed quantities and
                        allowances:

                        Taxi-out fuel: 109 Pounds, equivalent to 9 minutes.

                        Takeoff and Climbout Maneuver fuel: 99 Pounds.

<Page>

                        Approach and Landing Maneuver fuel: 101 Pounds.

                        Taxi-in fuel (shall be consumed from the reserve fuel):
                        97 Pounds, equivalent to 8 minutes of taxi.

                        The usable reserve fuel remaining upon completion of the
                        landing: 2,350 Pounds.

                  A.2.2 OPERATIONAL EMPTY WEIGHT BASIS

                        Operational empty weight (OEW) derived in accordance
                        with Paragraph a.2.3 shall be used as the basis for the
                        mission payload guarantees of Paragraph a.2.1.

                  A.2.3 EMB-140 WEIGHT SUMMARY

<Table>
<Caption>
             ---------------------------------------------------------------------------------------------------
                                               ITEMS                               WEIGHT (KG)    WEIGHT (LB)
             ---------------------------------------------------------------------------------------------------
<S>                                                                                     <C>           <C>
                 1 - M.E.W Std. EMB-140 Aircraft Configuration(*)                       11,100        24,471
             ---------------------------------------------------------------------------------------------------

             ---------------------------------------------------------------------------------------------------
                 2 - Option to std EMB-140 Aircraft (**)                                   677.7        1,495
             ---------------------------------------------------------------------------------------------------

             ---------------------------------------------------------------------------------------------------
                 3 - M.E.W.  Customer Configuration LR  version                         11,777.2       25,966
             ---------------------------------------------------------------------------------------------------

             ---------------------------------------------------------------------------------------------------
                 4 - Operating Items                                                       556          1,226
             ---------------------------------------------------------------------------------------------------
                 a - Pilot and Copilot (180 Lb each) (***)                                 164.0          361.6
             ---------------------------------------------------------------------------------------------------
                 b - Stewardess (140 Lb each) (***)                                         64.0          141.1
             ---------------------------------------------------------------------------------------------------
                 c - Engine oil                                                             24.0           52.9
             ---------------------------------------------------------------------------------------------------
                 d - Hydraulic Fluid                                                        36.0           79.4
             ---------------------------------------------------------------------------------------------------
                 e - Unusable Fuel                                                          44.0           97.0
             ---------------------------------------------------------------------------------------------------
                 f - Apu Oil                                                                 2.0            4.4
             ---------------------------------------------------------------------------------------------------
                 g - Toilet Fluid                                                            7.0           15.4
             ---------------------------------------------------------------------------------------------------
                 h - Water                                                                  20.0           44.1
             ---------------------------------------------------------------------------------------------------
                 i - Flight Kit                                                             10.0           22.0
             ---------------------------------------------------------------------------------------------------
                 j - Crew Baggage                                                           20.4           45.0
             ---------------------------------------------------------------------------------------------------
                 k - Catering Standard                                                     160.0          352.7
             ---------------------------------------------------------------------------------------------------
                 l - Pass. Serv. Equip.                                                      4.5            9.9
             ---------------------------------------------------------------------------------------------------
                 m - 2nd Attendant                                                           0.0            0.0
             ---------------------------------------------------------------------------------------------------

             ---------------------------------------------------------------------------------------------------
                 5 - O. E. W.  Customer Configuration LR version                       12,3334         27,191
             ---------------------------------------------------------------------------------------------------
</Table>

<Page>

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

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

                  REMARKS:

                  (*) See Customer Options Table (Item a.5.4).

                  (**) In accordance with Advisory Circular No: 120-27C (U.S.
                       Depart. Of Transp./FAA)

                  a.2.4 CUSTOMER OPTIONS TABLE:

<Table>
<Caption>
       ------------------------------------------------------------------------------------------------------------------
                                              ITEMS                                  OPT           WEIGHT         WEIGHT
                                                                                                    (KG)           (LB)
       ------------------------------------------------------------------------------------------------------------------
<S>                                                                                   <C>          <C>             <C>
            A) OPTIONS TO STD AVIONIC CONFIGURATION
       ------------------------------------------------------------------------------------------------------------------
               01. CAT-II                                                             Y              0.0             0.0
               ----------------------------------------------------------------------------------------------------------
               02. DME (2nd)                                                          Y              1.5             3.3
       ------------------------------------------------------------------------------------------------------------------
               03. ADF  (2nd)                                                         Y              8.0            17.6
       ------------------------------------------------------------------------------------------------------------------
               04. Transponder Mode S (2nd)                                           Y              1.0             2.2
       ------------------------------------------------------------------------------------------------------------------
               05. Weather Radar w/ Independent Selection                             Y              1.0             2.2
       ------------------------------------------------------------------------------------------------------------------
               06. VHF (3rd)                                                          Y              6.0            13.2
       ------------------------------------------------------------------------------------------------------------------
               07. FMS+GPS Dual Universal                                             Y             26.0            57.3
       ------------------------------------------------------------------------------------------------------------------
               08. Printer                                                            Y              5.0            11.0
       ------------------------------------------------------------------------------------------------------------------
               09. AFDAU                                                              Y              8.0            17.6
       ------------------------------------------------------------------------------------------------------------------
               10. Single Potentiometer to control FA volume                          Y              1.0             2.2
       ------------------------------------------------------------------------------------------------------------------
               11. ACARS                                                              Y              8.5            19.0
       ------------------------------------------------------------------------------------------------------------------

       ------------------------------------------------------------------------------------------------------------------
            B) OPTIONAL SYSTEM / OTHER EQUIPMENT
       ------------------------------------------------------------------------------------------------------------------
               01. Thrust Reversers                                                   Y            173.0           381.4
       ------------------------------------------------------------------------------------------------------------------
               02.  APU Silencer                                                      Y             13.0            28.7
       ------------------------------------------------------------------------------------------------------------------
               03. Cockpit Floodlight                                                 Y              2.5             5.5
       ------------------------------------------------------------------------------------------------------------------
               04. External Painting w/ capability to be polished                     Y             54.0           119.0
       ------------------------------------------------------------------------------------------------------------------
               05. LR Version                                                         Y            172.0           378.4
       ------------------------------------------------------------------------------------------------------------------
               06. Service door sill protection                                       Y              3.0             6.6
       ------------------------------------------------------------------------------------------------------------------
               07. Cargo door sill protection                                         Y              3.5             7.7
       ------------------------------------------------------------------------------------------------------------------
               08. Cargo Door Light                                                   Y              1.0             2.2
       ------------------------------------------------------------------------------------------------------------------
               09. Optional Main Door (without steps)                                 Y             -8.0           -17.6
       ------------------------------------------------------------------------------------------------------------------
               10. Gust Lock for Elevator Surfaces                                    Y              2.6             5.7
       ------------------------------------------------------------------------------------------------------------------
               11.  Floor Covering in Cargo Compartment - GE Lexan                    Y              3.3             7.3
       ------------------------------------------------------------------------------------------------------------------
               12.  Provisions for Antenna for In-Flight Phone (antenna to be
               provided as loose item)                                                Y              4.0             8.8
       ------------------------------------------------------------------------------------------------------------------
               13.  Steering Disengage Outside Cockpit                                Y              0.2             0.5
       ------------------------------------------------------------------------------------------------------------------
               14.  Floor Mat per AMR request                                         Y              1.2             2.6
       ------------------------------------------------------------------------------------------------------------------
</Table>

<Page>

<Table>
<S>                                                                                   <C>          <C>             <C>
            C) INTERIOR OPTIONAL ITEMS
       ------------------------------------------------------------------------------------------------------------------
               01. Interior Option 3   (1)                                            Y             71.0            156.5
       ------------------------------------------------------------------------------------------------------------------
               02. Audio Entertainment                                                Y              2.5             5.5
       ------------------------------------------------------------------------------------------------------------------
               03. Aft Hand Set & Cradle                                              Y              2.5             5.5
       ------------------------------------------------------------------------------------------------------------------
               04. Blue Sterile Light                                                 Y              0.5             1.1
       ------------------------------------------------------------------------------------------------------------------
               05. 3rd Oxygen Mask                                                    Y              1.5             3.3
       ------------------------------------------------------------------------------------------------------------------
               06. Customized Passenger Seat AMR Leather                              Y               86            190.0
       ------------------------------------------------------------------------------------------------------------------
               07. Baggage Restraint Net                                              Y              8.0            17.6
       ------------------------------------------------------------------------------------------------------------------
               08. Vertical Baggage Barrier Net                                       Y             10.0            22.0
       ------------------------------------------------------------------------------------------------------------------
               09. Provisions for Defibrillator                                       Y              4.5             9.9
       ------------------------------------------------------------------------------------------------------------------

       ------------------------------------------------------------------------------------------------------------------
                                                      SUB-TOTAL   (OPTIONS STD A/C)                677.7           1,495
       ------------------------------------------------------------------------------------------------------------------
</Table>

      (1)   Galley inserts (Trolley, SU, Hot Jugs) and catering are not included

                  a.3 WEIGHT

                        a.3.1 The manufacturer's empty weight (M.E.W.), for
                              Customer configuration, is guaranteed to be:

                              NOMINAL:      25,966 POUNDS
                              TOLERANCE:       259 POUNDS
                              GUARANTEE:    26,225 POUNDS

2.    EMB-140 AIRCRAFT CONFIGURATION

      2.1   The guarantees stated above are based on the EMB-140 Basic Aircraft
            configuration as defined in the Technical Description TD-140/002
            dated April 2000, plus specific Buyer configuration options as
            defined at Attachment "A" to the Purchase Agreement, (hereinafter
            referred to as the Detail Specification). Appropriate adjustment to
            the guarantees shall be made for changes in such Detail
            Specification approved in writing by the Buyer and Embraer. Such
            adjustments shall be accounted for by Embraer in its evidence of
            compliance with the guarantees.

            In the event a change is made to any law, governmental regulation or
            requirement, or in the interpretation of any such law, governmental
            regulation or requirement that affects the certification basis for
            the EMB-140 Aircraft, and as a result thereof, a change is made to
            the configuration and/or the performance of the EMB-140 Aircraft in
            order to obtain certification, the guarantees set forth in this
            EMB-140

<Page>

            Aircraft Performance Guarantee shall be appropriately modified to
            reflect any such change.

      2.2   The guarantee payloads of Paragraph 1.a.5 and the Manufacturer's
            Empty Weight guarantee of Section 1.a.6 shall be adjusted by Embraer
            for the following in its evidence of compliance with such
            guarantees:

            (1)   Changes to the Detail Specification including Change Requests,
                  Master Changes, Change Orders or any other changes mutually
                  agreed upon between the Buyer and Embraer.

            (2)   The difference between the component weight allowances given
                  in the appropriate section of the Detail Specification and the
                  actual weights.

3.    GUARANTEE CONDITIONS

      3.1   All guaranteed performance data are based on the ICAO International
            Standard Atmosphere (ISA) and specified variations there from;
            altitudes are pressure altitudes.

      3.2   The FAA Regulations (FAR) referred to in this Schedule are, unless
            otherwise specified, the EMB-140 Certification Basis regulations
            specified in the Type Certificate Data Sheet. The reference number
            for the Certificate Data Sheet and its date of issue will be
            provided to Buyer within fifteen (15) days of type approval.

      3.3   The takeoff and landing guarantees are based on hard surface, level
            and dry runways with no wind or obstacles, no clearway or stopway,
            and with automatic anti-skid operative unless otherwise specified.
            The takeoff performance is based on no engine bleed for air
            conditioning or thermal anti-icing and the Auxiliary Power Unit
            (APU) turned off unless otherwise specified. The improved climb
            performance procedure will be used for takeoff as required. The
            landing data is based on the use of automatic spoilers.

      3.4   The cruise specific air range, speed and altitude capability, and
            the climb, cruise and descent portions of the mission guarantees
            include allowances for normal electrical power extraction and normal
            operation of the air conditioning system. Normal power extraction
            shall be defined as not less than a 37 kW total electrical and
            hydraulic loads. Normal operation of the air conditioning system
            shall be defined as operation in the automatic mode, with the
            temperature control set to maintain a nominal cabin temperature of
            75(DEGREE)F, and all air conditioning systems operating normally.
            This operation nominally

<Page>

            allows a sea level cabin altitude to be maintained up to 19,500 feet
            and a maximum cabin pressure differential of 7.8 pounds per square
            inch at higher altitudes, with a nominal EMB-140 Aircraft cabin
            ventilation rate of 1,100 cubic feet per minute at 35,000 ft
            including passenger cabin recirculation (nominal recirculation is 42
            percent not considering gasper flow). The APU is turned off unless
            otherwise specified.

      3.5   The cruise specific air range, speed and altitude capability, and
            the climb, cruise, and descent portions of the mission guarantees
            are based on an EMB-140 Aircraft center of gravity location of 26
            percent of the mean aerodynamic chord.

      3.6   Performance, where applicable, is based on a fuel Lower Heating
            Value (LHV) of 18,580 BTU per pound and a fuel density of 6.70
            pounds per U.S. gallon.

4.    PARTIES' OBLIGATIONS ACCORDING TO THIS GUARANTEE

      RELATIVE TO THE GUARANTEES STATED IN PARAGRAPH 1.a above:

      4.1   During the EMB-140 Aircraft acceptance to be performed by Buyer in
            accordance with Article 7 of the Purchase Agreement, Buyer shall
            check the EMB-140 Aircraft performance specified in paragraph 1.a of
            this Schedule A, by using the EMB-140 Aircraft Flight Manual (AFM)
            and by comparing the flight test data, at the atmospheric conditions
            prevailing during the flight, with the information presented in the
            EMB-140 Supplementary Performance Manual (SPM). All the performance
            guarantee under this Schedule A are in accordance with both manuals
            above mentioned, taking into consideration the established
            tolerances.

      4.2   Embraer's obligations in respect to the guarantees stated in
            Paragraph 1.a of this Schedule A, are limited to Buyer's right to
            terminate the Purchase Agreement in respect to the relevant EMB-140
            Aircraft, pursuant to Article 22.d. should it be reasonably verified
            that such EMB-140 Aircraft during the acceptance procedure specified
            in Article 7 of the Purchase Agreement, cannot comply with the
            performances guaranteed hereunder after Embraer has had a reasonable
            opportunity to cure such deficiencies in accordance with Article 7.

      4.3   In case during the above mentioned acceptance procedure, it is
            proven that the EMB-140 Aircraft performance does not comply with
            the performances specified in Paragraph 1.a of this Schedule A, but
            Buyer considers it satisfactory by accepting delivery of such
            EMB-140

<Page>

            Aircraft, then Embraer shall not be liable to any claim or demand
            whatsoever from Buyer with respect to such performance guarantees.

      4.4   Upon acceptance of the EMB-140 Aircraft by Buyer, all obligations of
            Embraer regarding the Aircraft performance guarantees specified in
            Paragraph 1.a, shall cease.

5.    GUARANTEE COMPLIANCE

      5.1   Compliance with the guarantees of Section 1.a shall be based on the
            conditions specified in that section, the EMB-140 Aircraft
            configuration of Section 2 and the guarantee conditions of Section
            3.

      5.2   Compliance with the takeoff, landing, and TOW Climb limit guarantees
            shall be based on the FAA-approved Airplane Flight Manual for the
            EMB-140.

      5.3   Compliance with the cruise specific air range, speed, and the climb,
            cruise and descent portions of the mission guarantees shall be
            established by calculations based on the comparison mentioned in
            Section 4.1 above.

      5.4   The data derived from tests shall be adjusted as required by
            conventional methods of correction, interpolation or extrapolation
            in accordance with established engineering practices to show
            compliance with provisions of Section 1.a.

      5.5   Compliance with the Manufacturer's Empty Weight guarantee shall be
            based on information in the appropriate approved weight and balance
            manual, or associated document or report.

      5.6   Compliance with the guarantees set forth in this Schedule does not
            depend on the engine meeting the performance requirements contained
            in the engine specification.

6.    EXCLUSIVE GUARANTEES

      6.1   The only performance guarantees applicable to the EMB-140 Aircraft
            are those set forth in this document. The performance guarantees set
            forth herein are established between Buyer and Embraer and may not
            be transferred or assigned to others, unless by previous written
            consent of Embraer.

      6.2   THE GUARANTEES, OBLIGATIONS AND LIABILITIES OF Embraer, AND REMEDIES
            OF Buyer SET FORTH IN THIS

<Page>

            PERFORMANCE GUARANTEE ARE EXCLUSIVE AND IN SUBSTITUTION FOR, AND
            Buyer HEREBY WAIVES, RELEASES AND RENOUNCES, ALL OTHER RIGHTS,
            CLAIMS, DAMAGES AND REMEDIES OF Buyer AGAINST Embraer OR ANY
            ASSIGNED OF Embraer, EXPRESS OR IMPLIED, ARISING BY LAW OR
            OTHERWISE, WITH RESPECT TO ANY ACHIEVED PERFORMANCE.

      6.3   The terms and conditions of this Performance Guarantee do not alter,
            modify or impair, in any way, the terms and conditions of Attachment
            C (EMB-140 AIRCRAFT WARRANTY CERTIFICATE) to this Agreement.

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