Please wait
Exhibit 10.128
Certain information contained in this document, marked by brackets, has been omitted because it is both (i) not material and (ii) is the type that the registrant treats as private or confidential.

SUPPLEMENTAL AGREEMENT NO. 36

to

PURCHASE AGREEMENT NO. 03735

between
    
THE BOEING COMPANY

and

AMERICAN AIRLINES, INC.

Relating to Boeing Model 737 MAX Aircraft
This SUPPLEMENTAL AGREEMENT No. 36 (SA-35) To PURCHASE AGREEMENT NO. 03735, entered into as of October 13, 2025 (Effective Date), by and between THE BOEING COMPANY, a Delaware corporation with offices in Seattle, Washington (Boeing) and AMERICAN AIRLINES, INC. a Delaware corporation with offices in Fort Worth, Texas, together with its successors and permitted assigns (Customer);
WHEREAS, Boeing and Customer entered into Purchase Agreement No. 03735 dated February 1, 2013 relating to Boeing Model 737 MAX Aircraft, as amended and supplemented (Purchase Agreement) and capitalized terms used herein without definitions shall have the meanings specified therefore in such Purchase Agreement;

    WHEREAS, Boeing provided to Customer notice No. AAL-NM-2504656, dated September 1, 2025, [****] to Customer for [****] Aircraft, each capitalized term as defined in Letter Agreement No. AAL-PA-3735-LA-2306984 entitled “[****]” (the [****]);

WHEREAS, Customer provided notice to Boeing, on September 22, 2025, [****] Aircraft and Boeing and Customer agree to [****] such [****] Aircraft (now a [****] Aircraft (as defined in the [****])) to the following [****] (as defined in the [****]) as shown below:



[****]
[****]
[****]
[****]
[****]
[****]
PA 03735    SA-36
    Page 1    
BOEING AND AMERICAN PROPRIETARY


[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]

    WHEREAS, Customer and Boeing agree to [****], as defined in Letter Agreement No. AAL-PA-03735-LA-1106651R15 entitled “[****]” (the [****]), for [****] ([****]) [****] Aircraft, (as defined in the [****]) listed in Attachment B of the [****], to the [****] as shown below:

[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
;and

    WHEREAS, Customer and Boeing agree to update and revise, applicable to this Purchase Agreement, Article 11, “Notices” of the AGTA;

    NOW, THEREFORE, in consideration of the mutual covenants herein contained, the parties agree that the Purchase Agreement is amended and supplemented as set forth below and otherwise agree as follows:

1.Table of Contents.
The “Table of Contents” to the Purchase Agreement referencing SA-35 in the footer is deleted in its entirety and is replaced with the new “Table of Contents” (attached hereto) referencing SA-36 in the footer to reflect changes made to the Purchase Agreement by this SA-36. Such new Table of Contents is hereby incorporated into the Purchase Agreement in replacement of its predecessor.

2.Tables.
Table 1-7.     Table 1-7 of the Purchase Agreement titled “[****] Aircraft Delivery Description, Price and Advance Payments,” is hereby deleted in its entirety and
PA 03735    SA-36
    Page 2    
BOEING PROPRIETARY


replaced with a new Table 1-7 titled “[****] Aircraft Delivery Description, Price and Advance Payments,” attached hereto, referencing SA-36 in the footer.1
3.Letter Agreement.
3.1[****]. Letter Agreement No. AAL-PA-03735-LA-2306975R1 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-2306975R2 (attached hereto) entitled “[****]”, (Revised [****] Letter Agreement), referencing SA-36 in the footer, to reflect [****] (as defined in the [****]) for each of the [****] Aircraft listed in the table above and to memorialize the parties [****] in Section 2.2(iii) of the [****] related to the [****] for the [****] Aircraft. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.

3.2[****]. Letter Agreement No. AAL-PA-03735-LA-1106654R1 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-1106654R2 (attached hereto) entitled “[****]”, (Revised [****] Letter Agreement), referencing SA-36 in the footer, to reflect updates to the addresses and requirements for notices required by Article 11 “Notices” of the AGTA. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.
3.3[****]. Letter Agreement No. AAL-PA-03735-LA-110665R15 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-1106651R16 (attached hereto) entitled “[****]”, (Revised [****] Letter Agreement), referencing SA-36 in the footer, to reflect the [****] of [****] ([****]) [****] in Attachment B of the Revised [****] Letter Agreement. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.
4.[****].
Upon execution of this SA-36, [****]. [****] for the [****] Aircraft, [****] in this SA-36, will be [****] with the [****].
5.Miscellaneous.
5.1The Purchase Agreement is amended and supplemented as set forth above by the revised Table of Contents, Revised [****] Letter Agreement and the new Table 1-7. All other terms and conditions of the Purchase Agreement remain unchanged and are in full force and effect.

    5.2    References in the Purchase Agreement and any supplemental agreements and associated letter agreements to the letter agreement listed in the left column of the below table shall be deemed to refer to the corresponding revised versions of the supplemental exhibits and letter agreement listed in the right column of the below table.

1 The parties note that the prior convention for updating tables has been for each new version to be labeled Table 1-XXRX; however, for ease of reference, the parties have decided to no longer add the RX to the end of the Table reference.
PA 03735    SA-36
    Page 3    
BOEING PROPRIETARY


Reference
Replacement Reference
Letter Agreement No. AAL-PA-03735-LA- AAL-PA-03735-LA-2306975R1
Letter Agreement No. AAL-PA-03735-LA-2306975R2
Letter Agreement No. AAL-PA-03735-LA-1106654R1
Letter Agreement No. AAL-PA-03735-LA-1106654R2
Letter Agreement No. AAL-PA-03735-LA-1106651R15
Letter Agreement No. AAL-PA-03735-LA-1106651R16
5.3    If Boeing or Customer determines that references described in Section 5.2 of this SA-36 should be further amended or other references in the Purchase Agreement and any supplemental agreements and associated letter agreements need to be amended as a result of this SA-36, then Boeing and Customer will work together for a mutually agreeable solution.

The rest of this page is intentionally left blank

PA 03735    SA-36
    Page 4    
BOEING PROPRIETARY



AGREED AND ACCEPTED this
October 13, 2025
Date
THE BOEING COMPANY
AMERICAN AIRLINES, INC.
/s/ The Boeing Company
/s/ American Airlines, Inc.
Signature
Signature
The Boeing Company
American Airlines, Inc.
Printed name
Printed name
Attorney-in-Fact
VP, Financial Planning & Analysis
Title
Title





PA 03735    SA-36
    Page 5    
BOEING PROPRIETARY


TABLE OF CONTENTS
ARTICLES
SA
NUMBER
Article 1.
Quantity, Model and Description
Article 2.
Delivery Schedule
Article 3.
Price
Article 4.
Payment
Article 5.
Additional Terms
Article 6.
Confidentiality
TABLE
1R12
1-2R1
1-3R6

1-4R7

1-5R3

1-6

1-7
Aircraft Information Table
[****] Delivery Aircraft Information Table
[****] Aircraft Delivery, Description, Price, and Advance Payments
737-8 [****] Aircraft Delivery, Description, Price, and Advance Payments
[****] 737-8 [****] Aircraft Delivery, Description, Price, and Advance Payments
[****] Aircraft Delivery, Description, Price, and Advance Payments
[****] Aircraft Delivery, Description, Price, and Advance Payments
19
32
19

29

32

32

36
EXHIBITS
AR1
A2
A3
A4
Aircraft Configuration
Revised Delivery Aircraft Configuration
[****] Delivery Aircraft Configuration
[****] Aircraft Configuration
6
9
29
32
B.
Aircraft Delivery Requirements and Responsibilities
C.
Definitions
SUPPLEMENTAL EXHIBITS
AE1.
[****]
BFE1.
BFE2.
BFE Variables – [****]
BFE Variables – [****]

32
CS1R1.
CS1-2.
Customer Support Variables
Customer Support Variables [****]
4
33
PA-03735        Page 1 of 3
    SA-36
BOEING AND AMERICAN PROPRIETARY

image_1a.jpg
EE1.
EE1-2.
[****]
[****]

33
SLP1.
[****]
LETTER AGREEMENTS
SA
NUMBER
LA-1106648R1Special Matters6
LA-1106649[****]
LA-1106650R8[****]32
LA-1106651R16
[****]36
LA-1106652R3[****]32
LA-1106654R2
[****]36
LA-1106655
Open Matters – 737 MAX Withdrawn
6
LA-1106656R1[****]1
LA-1106657R1[****]2
LA-1106663 R1[****]2
LA-1106664 R1[****]2
LA-1106658[****]
LA-1106659R4[****]32
LA-1106660R1Spare Parts Initial Provisioning33
LA-1106661R2[****]2
LA-1106667[****]
LA-1106668R1[****]8
LA-1106669[****]
LA-1106670R1Confidentiality 32
LA-1106671R2Miscellaneous Commitments32
LA-1106672Extended Warranty Option
LA-1106673R1*[****]4
LA-1106677Optional Features Comfort Letter
LA-1600073[****]4
LA-1600852[****]
LA-1603773[****]5
LA-1605402R1[****]23
LA-1700919[****]7
LA-1801206[****]9
LA-2002704[****]11
LA-2002743[****]11
LA-2003342[****]11
LA-2003486[****]14
LA-2204032R1[****]32
PA-03735        Page 2 of 3
    SA-36
BOEING AND AMERICAN PROPRIETARY


image_1a.jpg
LETTER AGREEMENTS, continued
SA
NUMBER
LA-2306974[****]32
LA-2306975R2
[****]36
LA-2306976[****]32
LA-2306977[****]32
LA-2306978[****]32
LA-2306979[****]32
LA-2306980[****]32
LA-2306981[****]32
LA-2306982[****]32
LA-2306983R1[****]34
LA-2306984[****]32
LA-2306985[****]32
LA-2306986[****]32
LA-2402910[****]33

* - This is an intended gap as there are no Letter Agreements LA-1106674 through LA-1106676 incorporated by the Purchase Agreement.
PA-03735        Page 3 of 3
    SA-36
BOEING AND AMERICAN PROPRIETARY


Table 1-7 To
Purchase Agreement No. PA-03735
[****] Aircraft Delivery, Description, Price and Advance Payments
Airframe Model/MTOW:
737-10
[****] pounds
Detail Specification:
                                             [****]
Engine Model/Thrust:
CFMLEAP-1B27
[****]pounds
Airframe Price Base Year/Escalation Formula:
[****]
[****]
Airframe Price:
$[****]
Engine Price Base Year/Escalation Formula:
Optional Features:
$[****]
Sub-Total of Airframe and Features:
$[****]
Airframe Escalation Data:
Engine Price (Per Aircraft):
$[****]
[****]
Aircraft Basic Price (Excluding BFE/SPE):
$[****]
Base Year Index (ECI):
Buyer Furnished Equipment (BFE) Estimate:
$[****]
Base Year Index (ECI):
   [****]
In-Flight Entertainment (IFE) Estimate:
$[****]
LIFT Seats Provided by Boeing (Estimate):
$[****]
Deposit per Aircraft:
$[****]

[****]
(if Applicable)^
Number
Escalation
Nominal
Escalation Estimate
Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery)*:
Delivery
of
Factor
Notes
Delivery
Adv Payment Base
At Signing
[****]
[****]
Total
Date
Aircraft
(Airframe)
Month
Price Per A/P
[****]
[****]
[****]
[****]
[****]-2028
1
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
2
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
3
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
AAL-PA-03735 122715-1F.txt        Boeing and American Proprietary                            SA-36
Page 1

Table 1-7 To
Purchase Agreement No. PA-03735
[****] Aircraft Delivery, Description, Price and Advance Payments
[****]
(if Applicable)^
Number
Escalation
Nominal
Escalation Estimate
Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery)*:
Delivery
[****]
(if Applicable)^
of
Factor
Notes
Delivery
Adv Payment Base
At Signing
[****]
[****]
Total
Date
[****]
(if Applicable)^
Aircraft
(Airframe)
Month
Price Per A/P
[****]
[****]
[****]
[****]
[****]-2028
3
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
2
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
3
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
3
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
3
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2028
2
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
1
[****]
1
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
AAL-PA-03735 122715-1F.txt        Boeing and American Proprietary                            SA-36
Page 2

Table 1-7 To
Purchase Agreement No. PA-03735
[****] Aircraft Delivery, Description, Price and Advance Payments
[****]
(if Applicable)^
Number
Escalation
Nominal
Escalation Estimate
Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery)*:
Delivery
[****]
(if Applicable)^
of
Factor
Notes
Delivery
Adv Payment Base
At Signing
[****]
[****]
Total
Date
[****]
(if Applicable)^
Aircraft
(Airframe)
Month
Price Per A/P
[****]
[****]
[****]
[****]
[****]-2029
1
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
2
[****]
1
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
2
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
1
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
3
[****]
1
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
2
[****]
2
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
3
[****]
1, 2
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
AAL-PA-03735 122715-1F.txt        Boeing and American Proprietary                            SA-36
Page 3

Table 1-7 To
Purchase Agreement No. PA-03735
[****] Aircraft Delivery, Description, Price and Advance Payments
[****]
(if Applicable)^
Number
Escalation
Nominal
Escalation Estimate
Advance Payment Per Aircraft (Amts. Due/Mos. Prior to Delivery)*:
Delivery
[****]
(if Applicable)^
of
Factor
Notes
Delivery
Adv Payment Base
At Signing
[****]
[****]
Total
Date
[****]
(if Applicable)^
Aircraft
(Airframe)
Month
Price Per A/P
[****]
[****]
[****]
[****]
[****]-2029
1
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
2
[****]
1
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]-[****]
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
1
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
Yes
$[****]
$[****]
$[****]
$[****]
$[****]
[****]-2029
[****]
No
$[****]
$[****]
$[****]
$[****]
$[****]
Total:
30
*[****]
^[****]
Notes:
1 - [****]
2 – [****]
AAL-PA-03735 122715-1F.txt        Boeing and American Proprietary                            SA-36
Page 4

                                    
image_7.jpg        
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_3a.jpg
AAL-PA-03735-LA-1106651R16    
American Airlines, Inc.
P.O. Box 619616
Dallas-Fort Worth Airport, Texas 75261-9616    
Subject:    [****]
Reference:    Purchase Agreement No. 03735 (Purchase Agreement) between The Boeing Company (Boeing) and American Airlines, Inc. (Customer) relating to Model 737 MAX aircraft (Aircraft)
This letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the same meaning as in the Purchase Agreement.
1.Right to Purchase [****].
Subject to the terms and conditions contained in this Letter Agreement, in addition to the Aircraft described in [****] to the Purchase Agreement as of the date of execution of this Letter Agreement, [****] ([****]) and [****] ([****]). As of the Effective Date (as defined in Supplemental Agreement No. 34 to the Purchase Agreement (SA-34)) of SA-34 to the Purchase Agreement, there are [****].
6.[****].
6.1Intentionally Omitted.
6.2Intentionally Omitted.
6.3[****]. The [****] with [****] ([****]) in [****] ([****]) [****] for each [****] are listed in Attachment B to this Letter Agreement. No later than [****] to the [****] in each calendar [****] for years [****], Boeing will provide written notice setting forth [****] with a [****] in such calendar [****] ([****]). However, [****], the [****] for such [****] will be [****]. Such notice will constitute an amendment to Attachment B to this Letter Agreement.
7.[****].
7.1Subject to the provisions of Section 3.2 below, the [****] the Detail Specification for the Aircraft [****] at the time of [****] (as defined in Section 8 below). Such Detail Specification will be revised to include:
(i)[****],
(ii)[****], and
(iii)     [****].
AAL-PA-03735-LA-1106651R16    SA-36
[****]    Page 1 of 5
BOEING AND AMERICAN PROPRIETARY

image_2a.jpg                    
7.2[****] the right to [****] the [****] starting from a [****]; [****] which would result pursuant to the provisions of Section 3.1 above.
8.[****].
8.1The [****] for each of the [****] to this Letter Agreement.
8.2The [****] for each of the [****] shall be [****] ([****]) [****].
8.3The [****] shall be developed in accordance with the terms of the Purchase Agreement and determined at the time of [****].
9.[****].
9.1[****].
9.2[****].
9.3[****].
10.Reserved.
11.[****].
11.1Customer may [****] to Boeing [****] ([****]):
11.1.1Intentionally Omitted.
11.1.2[****].
11.2Reserved.
12.[****].
12.1[****]t.
12.2Reserved.
12.2.1Reserved.
8.2.2    Reserved.
8.3     Reserved.
    8.3.1    Reserved.
13.Assignment.
Notwithstanding any other provisions of the Purchase Agreement, the rights and obligations described in this Letter Agreement are provided to Customer in consideration of Customer’s becoming the operator of the Aircraft and cannot be assigned in whole or, in part, without the prior written consent of Boeing.
AAL-PA-03735-LA-1106651R16    SA-36
[****]    Page 2 of 5
BOEING AND AMERICAN PROPRIETARY

image_2a.jpg                    
14.Confidential Treatment.
The information contained herein represents confidential business information and has value precisely because it is not available generally or to other parties. This Letter Agreement shall be subject to the terms and conditions of Letter Agreement No. AAL-PA-03735-LA-1106670R1 entitled “Confidentiality”.

Very truly yours,

THE BOEING COMPANY

/s/ The Boeing Company
By:
The Boeing Company
Its:
Attorney-In-Fact
AAL-PA-03735-LA-1106651R16    SA-36
[****]    Page 3 of 5
BOEING AND AMERICAN PROPRIETARY

image_2a.jpg                    
ACCEPTED AND AGREED TO this
Date:
October 13, 2025
AMERICAN AIRLINES, INC.

/s/ American Airlines, Inc.
By:
American Airlines, Inc.
Its:
VP, Financial Planning & Analysis



Attachments:
Attachment A – Intentionally Omitted.
Attachment B – 737-10 [****] Aircraft



AAL-PA-03735-LA-1106651R16    SA-36
[****]    Page 4 of 5
BOEING AND AMERICAN PROPRIETARY

Attachment B To
Letter Agreement No. AAL-PA-03735-LA-1106651R15
737-10 [****] Aircraft Delivery, Description, Price and Advance Payments

Airframe Model/MTOW:
737-10
[****
Configuration Specification:
[****]
Engine Model/Thrust:
CFMLEAP-1B27
[****]
Airframe Price Base Year/Escalation Formula:
[****]
[****]
Airframe Price:
$[****]
Engine Price Base Year/Escalation Formula:
Optional Features Estimate:
    $[****]
Sub-Total of Airframe and Features:
$[****]
Airframe Escalation Data:
Engine Price (Per Aircraft):
$[****]
Base Year Index (ECI):
[****]
Aircraft Basic Price (Excluding BFE/SPE):
$[****]
Base Year Index (CPI):
[****]
Buyer Furnished Equipment (BFE) Estimate:
$[****]
Seller Purchased Equipment (SPE)/In-Flight Entert
$[****]
Non-Refundable Deposit/Aircraft:
$[****]
Delivery
Number of
Nominal Delivery
Date
Aircraft
Month
[****]-2029

2
No
[****]-2029
Yes
[****]-2029
No
[****]-2029

1
No
[****]-2029
Yes
[****]-2029
No
[****]-2029

1
No
[****]-2029
Yes
[****]-2029
No
[****]-2029

1
No
[****]-2029
Yes
[****]-2029
No
[****]-2029

1
No
[****]-2029
Yes
[****]-2029
No
[****]-2030

2
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

2
No
[****]-2030
Yes
[****]-2030
No
AAL-PA-03735-LA-1106651R16 122666-1O.txt                                                                 SA-36
Attachment B - [****] Aircraft                             Boeing and American Proprietary                             Page 1

Attachment B To
Letter Agreement No. AAL-PA-03735-LA-1106651R15
737-10 [****] Aircraft Delivery, Description, Price and Advance Payments
Delivery
Number of
Nominal Delivery
Date
Aircraft
Month
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

2
No
[****]-2030
Yes
[****]-2030
No
[****]-2030

1
No
[****]-2030
Yes
[****]-2030
No
[****]-2031

3
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

1
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

3
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

1
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

2
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

1
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

1
No
[****]-2031
Yes
[****]-2031
No

AAL-PA-03735-LA-1106651R16 122666-1O.txt                                                                 SA-36
Attachment B - [****] Aircraft                             Boeing and American Proprietary                             Page 2

Attachment B To
Letter Agreement No. AAL-PA-03735-LA-1106651R15
737-10 [****] Aircraft Delivery, Description, Price and Advance Payments

Delivery
Number of
Nominal Delivery
Date
Aircraft
Month
[****]-2031

2
No
[****]-2031
Yes
[****]-2031
No
[****]-2031

1
No
[****]-2031
Yes
[****]-2031
No
[****]-2032

2
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

2
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

4
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

3
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

2
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

2
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

1
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

1
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

1
No
[****]-2032
Yes
[****]-2032
No
[****]-2032

1
No
[****]-2032
Yes
[****]-2033
No
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
AAL-PA-03735-LA-1106651R16 122666-1O.txt                                                                 SA-36
Attachment B - [****] Aircraft                             Boeing and American Proprietary                             Page 3

Attachment B To
Letter Agreement No. AAL-PA-03735-LA-1106651R15
737-10 [****] Aircraft Delivery, Description, Price and Advance Payments

Delivery
Number of
Nominal Delivery
Date
Aircraft
Month
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

2
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

2
No
[****]-2033
Yes
[****]-2033
No
[****]-2033

1
No
[****]-2033
Yes
[****]-2033
No
[****]-2034

2
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

2
No
[****]-2034
Yes
[****]-2034
No
AAL-PA-03735-LA-1106651R16 122666-1O.txt                                                                 SA-36
Attachment B - [****] Aircraft                             Boeing and American Proprietary                             Page 4

Attachment B To
Letter Agreement No. AAL-PA-03735-LA-1106651R15
737-10 [****] Aircraft Delivery, Description, Price and Advance Payments

Delivery
Number of
Nominal Delivery
Date
Aircraft
Month
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2034
Yes
[****]-2034
No
[****]-2034

1
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

1
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

2
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

1
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

2
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

1
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

3
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

2
No
[****]-2035
Yes
[****]-2035
No
[****]-2035

2
No
[****]-2035
Yes
[****]-2035
No
Total:
87

Note: [****] to Letter Agreement No. AAL-PA-3735-11066508R8
AAL-PA-03735-LA-1106651R16 122666-1O.txt                                                                SA-36
Attachment B - [****] Aircraft                             Boeing and American Proprietary                            Page 5

imagea.jpg
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207

AAL-PA-03735-LA-2306975R2
American Airlines, Inc.
P.O. Box 619616
Dallas-Fort Worth Airport, Texas 75261-9616

Subject:    [****] – [****]

Reference:    Purchase Agreement No. 03735 (Purchase Agreement) between The Boeing Company (Boeing) and American Airlines, Inc. (Customer) relating to Model 737 MAX aircraft (Aircraft)

This letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement will have the same meaning as in the Purchase Agreement.
1.Definitions.
[****] means [****] ([****]) and [****] pursuant to Letter Agreement No. AAL-PA-03735-LA-1106651R16 entitled “[****]”.
[****] means [****] pursuant to Letter Agreement No. AAL-PA-03735-LA-2306978 entitled “[****]”.

    [****] means [****] to the Purchase Agreement as of the date of this Letter Agreement.

15.[****]. [****] Section 2.1 of the Purchase Agreement, Boeing will [****], [****], or [****]. However, if Boeing [****], or [****] as set forth in the proceeding sentence, the [****], [****], or [****].
16.[****].
16.1[****]. [****], Boeing will [****]:
16.1.1[****]. A [****] ([****]) in the [****] ([****]). The [****] ([****]) and will be [****].
16.1.2[****]. A [****] ([****]) in the [****] ([****]). Customer [****].
16.1.3[****]. A [****] ([****]) in the [****] ([****]), [****] (MTOW) of [****] [****]) of [****], and [****] ([****]) of [****], in [****]. The [****] ([****]) [****] to the Purchase Agreement in accordance with the terms and conditions of the Purchase Agreement. The [****] to the Purchase Agreement in accordance with the terms and conditions of the Purchase Agreement [****]. In the event Customer [****].
16.1.4[****]. An [****] ([****]) in the [****] ([****]). The [****].
16.1.5[****]. For [****] noted in [****] (as defined in the [****] LA, as defined below), Boeing will [****] in accordance with and as described in [****] of Letter
AAL-PA-03735-LA-2306975R2    SA-36
[****] – [****]    Page 1
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg
Agreement No. AAL-PA-3735-2306984, as amended, entitled “[****]” (the [****] LA) in the [****] ([****]) on [****] (as defined in the [****] LA) as shown below:
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]
[****]

16.2[****]. The [****] for any and all [****] will be [****] in accordance with Article 2.2(iii) of the [****] LA.
17.[****] – [****]
17.1[****]. At the [****], Boeing will [****]:
17.1.1[****]. An [****] ([****]) in the [****] ([****]). The [****] ([****]) and will be [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.1.2[****]. An [****] ([****]) in the [****] ([****]), [****], [****], [****]. The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****]. The [****], [****], and [****] ([****]) [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****]. In the event [****], [****] and [****], the [****].
17.1.3[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.1.4[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.1.5[****]. In [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.1.6[****]. In [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.1.7[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
AAL-PA-03735-LA-2306975R2                                  SA-36
[****] – [****]    Page 2
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg
17.2[****]. At the [****], Boeing [****]:
17.2.1[****]. [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.2.2[****]. [****] ([****]) in the [****] ([****]), [****], and [****], in [****]. The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****]. The [****], the [****], and the [****] ([****]) [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement. In the event [****], [****] and [****], the [****].
17.2.3[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.2.4[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the for the [****].
17.2.5[****]. In [****], a [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.2.6[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.3[****]. At the [****], Boeing will [****]:
17.3.1[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.3.2[****]. A [****] ([****]) in the [****] ([****]), [****], [****], and [****], in [****]. The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****]. In the event [****], [****] and [****], the [****]. The [****], the [****], and the [****] ([****]) [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.3.3[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
17.3.4[****]. A [****] ([****]) in the [****] ([****]). The [****] set forth in the Purchase Agreement and in accordance with the terms and conditions of the Purchase Agreement for the [****].
18.[****].
18.1If [****] of the following [****] Aircraft that is to be delivered by Boeing to Customer, [****] Aircraft [****], Boeing [****] ([****]) in the [****] ([****]):
i)[****]; and
ii)[****]; and
iii)[****].
18.2The [****] [****]).
19.[****]. [****], [****] ([****]) in the [****] ([****]). Customer [****] for [****].
AAL-PA-03735-LA-2306975R2                                  SA-36
[****] – [****]    Page 3
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg
20.[****].
Unless otherwise noted above, [****] pursuant to Article 3, Article 4, and Article 5 above may, [****], be [****] (i) [****], or (ii) [****] ([****]). For the avoidance of doubt and notwithstanding the foregoing, the [****] described in Article 3.1.5, above, [****].
21.Assignment.
The Credit Memoranda described in this Letter Agreement are provided as a financial accommodation to Customer and in consideration of Customer becoming the operator of the Aircraft. This Letter Agreement cannot be assigned, in whole or in part, without the prior written consent of Boeing.
22.Confidentiality.
The information contained herein represents confidential business information and has value precisely because it is not available generally or to other parties. This Letter Agreement shall be subject to the terms and conditions of Letter Agreement No. AAL-PA-03735-LA-1106670R1 entitled “Confidentiality”.




[Intentionally Left Blank]




AAL-PA-03735-LA-2306975R2                                  SA-36
[****] – [****]    Page 4
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg


ACCEPTED AND AGREED TO this







Date:
October 13, 2025







AMERICAN AIRLINES, INC.

THE BOEING COMPANY




By:
/s/ American Airlines, Inc.

By:
/s/ The Boeing Company




Name:
American Airlines, Inc.

Name:
The Boeing Company




Title:
VP, Financial Planning & Analysis

Title:
Attorney-In-Fact


AAL-PA-03735-LA-2306975R2                                  SA-36
[****] – [****]    Page 5
BOEING AND AMERICAN PROPRIETARY


imagea.jpg
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
    
AAL-PA-03735-LA-1106654R2

American Airlines, Inc.
P.O. Box 619616
Dallas-Fort Worth Airport, Texas 75261-9616


Subject:    [****]

Reference:    Purchase Agreement No. 03735 (Purchase Agreement) between The Boeing Company (Boeing) and American Airlines, Inc. (Customer) relating to Model 737 MAX aircraft (Aircraft)
This letter agreement (Letter Agreement) amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement shall have the same meaning as in the Purchase Agreement.
1.AGTA Basic Articles.
1.1.1Article 2.1.1, “Airframe Price,” of the basic articles of the AGTA is revised to read as follows: Airframe Price is defined as the price of the airframe for a specific model of Aircraft described in a Purchase Agreement. [****]
1.1.2Article 2.1.3, “Engine Price” of the basic articles of the AGTA is revised to read as follows: Engine Price is defined as the price set by the Engine Supplier for a specific Engine to be installed on the model of Aircraft described in a Purchase Agreement [****].
1.1.3Article 2.1.5, “Escalation Adjustment” of the basic articles of the AGTA is revised to read as follows: “Escalation Adjustment is defined as the aggregate price adjustment to the Airframe Price (which includes the basic engine price for Models [****]) and the Optional Features Prices resulting from the calculation using the economic price formula contained in the Airframe and Optional Features Escalation Adjustment supplemental exhibit to the applicable purchase agreement. The price adjustment to the Engine Price for all other models of aircraft will be calculated using the economic price formula in the Engine Escalation Adjustment supplemental exhibit to the applicable purchase agreement.”
1.1.4Article 9.2, “[****]”, is revised to read as follows:
“9.2 [****]”
1.1.5Article 11, “Notices”, is revised to read as follows:
11. Notices. All notices required by this AGTA or any applicable purchase agreement will be written in English, will be effective on the date of receipt, and may be transmitted by the following, each addressed as set forth below: (i) [****]; (ii) [****]; (iii) [****]:

AAL-PA-03735-LA-2306975R2    SA-36
LA Page 1 of 4
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg
Customer:
American Airlines, Inc.

Email:
[****] and
[****] (or [****])







Courier address:
American Airlines, Inc.
[****]
[****]
Attn: [****],[****]

Boeing
Delivery
or
Courier:
Boeing Commercial Airplanes
[****]
[****]
[****]
[****]

Attention:    [****]

Mail:
Boeing Commercial Airplanes
[****]
[****]
[****]

Attention:    [****]
        [****]




Email:
[****]
2.Appendices to the AGTA.
2.1In Appendix I, entitled “SAMPLE Insurance Certificate”, the Combined Single Limit Bodily Injury and Property Damage: U.S. Dollars ($) any one occurrence each Aircraft (with aggregates as applicable) is [****] in [****].
2.2 Appendix II, entitled “Purchase Agreement Assignment” is hereby deleted in its entirety and replaced with the attached Revised Appendix II.
2.3 Appendix III, entitled “Manufacturer’s Consent and Agreement to Assignment of Warranties” is hereby deleted in its entirety and replaced with the attached Revised Appendix III.
3.Exhibit C to the AGTA, “Product Assurance Document”.
AAL-PA-03735-LA-1106654R2    
[****]      LA Page 2 of 4
BOEING AND AMERICAN PROPRIETARY

image_7.jpg                                
The Boeing Company
P.O. Box 3707
Seattle, WA 98124-2207
image_6a.jpg
Solely for purposes of the Purchase Agreement, [****] are added to the [****] column in the table set forth in the existing Article 3.1 of Part 2 of Exhibit C to the AGTA.
4.[****].

[****].
5.Confidential Treatment.
Customer understands and agrees that the information contained herein represents confidential business information and has value precisely because it is not available generally or to other parties. This Letter Agreement shall be subject to the terms and conditions of Letter Agreement No. AAL-PA-03735-LA-1106670R1 entitled “Confidentiality”.
Very truly yours,

THE BOEING COMPANY

/s/ The Boeing Company
By:
The Boeing Company
Its:
Attorney-In-Fact
ACCEPTED AND AGREED TO this
Date:
October 13, 2025
 AMERICAN AIRLINES, INC.
/s/ American Airlines, Inc.
By:
American Airlines, Inc.
Its:
VP, Financial Planning & Analysis

AAL-PA-03735-LA-1106654R2    
[****]      LA Page 3 of 4
BOEING AND AMERICAN PROPRIETARY