EX-10.1

Exhibit 10.1

SUPPLEMENTAL AGREEMENT NO. 38

to

PURCHASE AGREEMENT NO. 03735

between

THE BOEING COMPANY

and

AMERICAN AIRLINES, INC.

Relating to Boeing Model 737 MAX Aircraft

This SUPPLEMENTAL AGREEMENT No. 38 (SA-38)To PURCHASE AGREEMENT NO. 03735, entered into as of August 7, 2026 (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-2603149, dated June 1 ,2026, [****] 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 June 29, 2026, [****] Aircraft and Boeing and Customer agree to [****] Aircraft (now a [****] Aircraft (as defined in the [****])) to the following [****] (as defined in the [****]) as shown below:

PA-03735    SA-38

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BOEING PROPRIETARY

    WHEREAS, Customer and Boeing agree to [****], as defined in Letter Agreement No. AAL-PA-03735-LA-1106651R17 entitled “[****]” (the [****]), for [****] ([****]) [****] Aircraft, (as defined in the [****]) listed in Attachment B of the [****], to the [****] as shown below:

;and

    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-37 in the footer is deleted in its entirety and is replaced with the new “Table of Contents” (attached hereto) referencing SA-38 in the footer to reflect changes made to the Purchase Agreement by this SA-38. 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 replaced with a new Table 1-7 titled “[****]Aircraft Delivery Description, Price and Advance Payments,”attached hereto, referencing SA-38 in the footer.

3.Letter Agreement.

3.1[****].Letter Agreement No. AAL-PA-03735-LA-2306975R3 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-2306975R4 (attached hereto) entitled “[****]”, (Revised [****] Letter Agreement), referencing SA-38 in the footer, to [****] (as defined in the [****]) for each of the [****] Aircraft listed in the table above. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.

PA-03735    SA-38    

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BOEING PROPRIETARY

3.2[****].Letter Agreement No. AAL-PA-03735-LA-110665R17 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-1106651R18 (attached hereto) entitled “[****]”, (Revised [****]Letter Agreement), referencing SA-38 in the footer, to reflect the rescheduling of [****] ([****]) [****] Aircraft in Attachment B of the Revised [****] Letter Agreement. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.

3.3[****].Letter Agreement No. AAL-PA-03735-LA-2306974R1 is hereby deleted in its entirety and replaced with Letter Agreement No. AAL-PA-03735-LA-2306974R2 (attached hereto) entitled “[****]”, (Revised [****]Letter Agreement), referencing SA-38 in the footer, to reflect an administrative update. The Revised [****] Letter Agreement is hereby incorporated into the Purchase Agreement.

4.[****].

4.1Upon execution of this SA-38, [****]. [****] for the [****] Aircraft, [****] in this SA-38, 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 [****] Aircraft Letter Agreement, Revised [****] Letter Agreement, Revised [****], and the new Table 1-7. All other terms and conditions of the Purchase Agreement remain unchanged and are in full force and effect.

5.2References 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.

5.3Solely for purposes of this SA-38, that Parties agree [****] ([****]) [****] in Section 2.2 of the [****] to [****] to [****] ([****]) [****] of its [****].

PA-03735    SA-38    

Page 3

BOEING PROPRIETARY

PA-03735    SA-38    

Page 4

BOEING PROPRIETARY

TABLE OF CONTENTS

PA-03735        Page 1 of 3

SA-38

BOEING PROPRIETARY

PA-03735        Page 2 of 3

SA-38

BOEING PROPRIETARY

* - 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-38

BOEING PROPRIETARY

Table 1-7 To

Purchase Agreement No. PA-03735

[****] Aircraft Delivery, Description, Price and Advance Payments

AL-PA-03735 122715-1F.txt                Boeing and American Proprietary                                    SA-38

Page 1

Table 1-7 To

Purchase Agreement No. PA-03735

[****] Aircraft Delivery, Description, Price and Advance Payments

AL-PA-03735 122715-1F.txt                Boeing and American Proprietary                                    SA-38

Page 2

Table 1-7 To

Purchase Agreement No. PA-03735

[****] Aircraft Delivery, Description, Price and Advance Payments

AL-PA-03735 122715-1F.txt                Boeing and American Proprietary                                    SA-38

Page 3

Table 1-7 To

Purchase Agreement No. PA-03735

[****] Aircraft Delivery, Description, Price and Advance Payments

AL-PA-03735 122715-1F.txt                Boeing and American Proprietary                                    SA-38

Page 4

Table 1-7 To

Purchase Agreement No. PA-03735

[****] Aircraft Delivery, Description, Price and Advance Payments

AL-PA-03735 122715-1F.txt                Boeing and American Proprietary                                    SA-38

Page 5

AAL-PA-03735-LA-1106651R18    

American Airlines, Inc.

1 Skyview Drive MD8B302

Fort Worth, Texas 76155

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) which replaces and supersedes Letter Agreement No. AAL-PA-03735-LA-1106651R17 (R17 Agreement), is entered into on the date below and 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. Revisions to the R17 Agreement are indicated in bold text.

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 [****].

2.[****].

2.1Intentionally Omitted.

2.2Intentionally Omitted.

2.3[****]. 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.

3.[****].

3.1Subject 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:

AAL-PA-03735-LA-1106651R18    SA-38

[****]    Page 1of 6

BOEING AND AMERICAN PROPRIETARY

(i)[****],

(ii)[****], and

(iii)     [****].

3.2[****] the right to [****] the [****] starting from a [****]; [****] which would result pursuant to the provisions of Section 3.1 above.

4.[****].

4.1The [****] for each of the [****] to this Letter Agreement.

4.2The [****] for each of the [****] shall be [****] ([****]) [****].

4.3The [****] shall be developed in accordance with the terms of the Purchase Agreement and determined at the time of [****].

5.[****].

5.1[****].

5.2[****].

5.3[****].

6.Reserved.

7.[****].

7.1Customer may [****] to Boeing [****] ([****]):

7.1.1Intentionally Omitted.

7.1.2[****].

7.2Reserved.

8.[****].

8.1[****].

8.2Reserved.

8.2.1Reserved.

8.2.2    Reserved.

8.3     Reserved.

    8.3.1    Reserved.

AAL-PA-03735-LA-1106651R18    SA-38

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BOEING AND AMERICAN PROPRIETARY

9.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.

10.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,

AAL-PA-03735-LA-1106651R18    SA-38

[****]    Page 3 of 5

BOEING AND AMERICAN PROPRIETARY

Attachments:

Attachment A – Intentionally Omitted.

Attachment B – 737-10 [****] Aircraft

AAL-PA-03735-LA-1106651R18        SA-38

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BOEING AND AMERICAN PROPRIETARY

Attachment B To

Letter Agreement No. AAL-PA-03735-LA-1106651R18

737-10 [****]Aircraft Delivery, Description, Price and Advance Payments

AAL-PA-03735-LA-1106651R18122666-1O.txt                                SA-38

Attachment B - [****] Aircraft        Boeing and American Proprietary                        Page 1

Attachment B To

Letter Agreement No. AAL-PA-03735-LA-1106651R18

737-10 [****]Aircraft Delivery, Description, Price and Advance Payments

AAL-PA-03735-LA-1106651R18122666-1O.txt                                SA-38

Attachment B - [****] Aircraft        Boeing and American Proprietary                        Page 2

Attachment B To

Letter Agreement No. AAL-PA-03735-LA-1106651R18

737-10 [****]Aircraft Delivery, Description, Price and Advance Payments