Exhibit 10.6

SUPPLEMENTAL AGREEMENT NO. 10

to

Purchase Agreement No. 3219

between

THE BOEING COMPANY

and

AMERICAN AIRLINES, INC.

Relating to Boeing Model 787 Aircraft

THIS SUPPLEMENTAL AGREEMENT No. 10 (SA-10) is made 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. 3219 dated October 15, 2008, relating to Boeing Model 787 aircraft, as amended and supplemented (Purchase Agreement) and capitalized terms used herein without definitions shall have the meanings specified in such Purchase Agreement; and

WHEREAS, Boeing and Customer desire to add Letter Agreement AAL-PA-03219-LA-1701988 entitled “[*CTR]” (New 787 [*CTR] Letter Agreement); and

NOW, THEREFORE, the parties agree that the Purchase Agreement is amended as set forth below and otherwise agree as follows:

The Table of Contents referencing SA-9 in the footer is deleted in its entirety and is replaced with the new Table of Contents (attached hereto) referencing SA-10 in the footer. Such new Table of Contents is hereby incorporated into the Purchase Agreement in replacement of its predecessor.

Table 1(R7).   Table 1(R6) entitled “787-9 Aircraft – Delivery, Description, Price and Advance Payments” referencing SA-9 in the footer is deleted in its entirety and is replaced with

BOEING PROPRIETARY

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the similarly titled Table 1(R7) (attached hereto) referencing SA-10 in the footer. Table 1(R7) is hereby incorporated into the Purchase Agreement in replacement of Table 1(R6).

3.1        New [*CTR] Letter Agreement. The New 787 [*CTR] Letter Agreement is added to the Purchase Agreement. The New 787 [*CTR] Letter Agreement is hereby made a part of the Purchase Agreement.

4.1        Table 1 Reference Clarifications. The following references in the Purchase Agreement and the associated exhibits, supplemental exhibits, and letter agreements to the Purchase Agreement to “Table 1(R6)” is now deemed to refer to “Table 1(R7)”. Specifically:

4.2        Except as expressly set forth herein, all terms and provisions contained in the Purchase Agreement shall remain in full force and effect. This Agreement contains the entire agreement between the parties with respect to the subject matter hereof and supersedes all previous proposals, and agreements, understandings, commitments or representations whatsoever, oral or written, with respect to the subject matter hereof and may be changed only in writing signed by authorized representatives of the parties.

BOEING PROPRIETARY

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BOEING PROPRIETARY

TABLE OF CONTENTS

BOEING PROPRIETARY

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TABLE OF CONTENTS, continued

BOEING PROPRIETARY

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TABLE OF CONTENTS, continued

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Table 1(R7) To Purchase Agreement No. PA-03219

787-9 Aircraft Delivery, Description, Price and Advance Payments

[*CTR]

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Table 1(R7) To Purchase Agreement No. PA-03219

787-9 Aircraft Delivery, Description, Price and Advance Payments

[*CTR]

      Total:                     22

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AAL-PA-3219-LA-1701988

American Airlines, Inc.

P.O. Box 619616

Dallas-Fort Worth Airport, Texas 75261-9616

This letter agreement (Letter Agreement) is entered into on the date below and amends and supplements the Purchase Agreement referenced above. All capitalized terms used in but not otherwise defined in this Letter Agreement shall have the same meaning as in the Purchase Agreement.

Customer and Boeing previously entered into the [*CTR] Letter Agreement which [*CTR] described in Attachment A to the [*CTR] Letter Agreement (collectively referred to as [*CTR] or [*CTR]). Customer has requested and Boeing agrees to the [*CTR].

In order to accomplish this [*CTR], Customer and Boeing agree that [*CTR] (as defined below) will be utilized for the [*CTR] identified in Attachment A hereto that will be [*CTR].

In order to document the use of the [*CTR], the parties agree as follows:

1.         Revisions to the [*CTR] Letter Agreement. [*CTR], the [*CTR] Letter Agreement is revised as follows:

“1.1.5 [*CTR], but such [*CTR]:

BOEING PROPRIETARY

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“1.1.6 Intentionally Omitted”

1.3       Section 1.2.4 is deleted in its entirety and replaced with the following:

“1.2.4 place, [*CTR] and which shall also include a statement that [*CTR]; additionally the [*CTR];”

1.4       Sections 1.2.5 through 1.2.8 are renumbered so that Section 1.2.5 becomes 1.2.7, Section 1.2.6 becomes Section 1.2.8, Section 1.2.7 becomes Section 1.2.9, and Section 1.2.8 becomes Section 1.2.10.

1.5       After Section 1.2.4, the following new sections are added:

“1.2.5 notify Customer as soon as possible [*CTR];

1.2.6 manage all [*CTR],”

1.6       Section 4.1.1 is amended by replacing the words “the [*CTR]” with “the [*CTR].”

1.7       Section 6.1 is amended by replacing the words “[*CTR]” with “[*CTR].”

1.8       Section 8.1 is deleted in its entirety and replaced with the following:

“8.1      [*CTR]. An [*CTR] for each Aircraft. Boeing and Customer agree that the [*CTR] for such Aircraft.”

1.9       Section 8.2 is deleted in its entirety and replaced with the following:

“8.2      Aircraft [*CTR]. The Aircraft [*CTR] for the [*CTR]..”

1.10     Section 10 is deleted in its entirety and replaced with the following:

“10.      [*CTR]. [*CTR] will at all times [*CTR] with Customer [*CTR] and Boeing will have [*CTR] would have, but will not be [*CTR].”

BOEING PROPRIETARY

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Customer and Boeing understand and agree that the information contained herein represents confidential business information and has value precisely because it is not generally available to other parties. This Letter Agreement shall be subject to the terms and conditions of Letter Agreement 6-1162-TRW-0673R1 entitled “Confidentiality”.

If the foregoing correctly sets forth your understanding of our agreement with respect to the matters treated above, please indicate your acceptance and approval below.

BOEING PROPRIETARY

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Very truly yours,

Attachments

BOEING PROPRIETARY

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BOEING PROPRIETARY

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BOEING PROPRIETARY

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BOEING PROPRIETARY

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BOEING PROPRIETARY

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BOEING PROPRIETARY

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BOEING PROPRIETARY

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