UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

For the Quarterly Period Ended March 31, 2013.

For the Transition Period From              to             .

Commission file number 1-2691.

American Airlines, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (817) 963-1234

Not Applicable

(Former name, former address and former fiscal year , if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    x  Yes    ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer” and “large accelerated filer” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    x  Yes    ¨  No

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    ¨  Yes    x  No

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

Common Stock, $1 par value – 1,000 shares as of June 5, 2013.

EXPLANATORY NOTE

This Form 10-Q/A (Amendment No. 1) to American Airlines Inc.’s (American) Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2013, initially filed with the Securities and Exchange Commission (SEC) on April 18, 2013 (Original Filing), is being filed in response to communications received from the SEC in connection with a confidential treatment request with respect to Exhibit 10.1, 2012 Omnibus Restructure Agreement, dated as of January 11, 2013, of the Original Filing. Item 6 of Part II of the Original Filing is hereby amended to include a revised redacted version of Exhibit 10.1.

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Item 6. Exhibits

Exhibits required to be filed by Item 601 of Regulation S-K. Where the amount of securities authorized to be issued under any of American’s long-term debt agreements does not exceed 10 percent of American’s assets, pursuant to paragraph (b) (4) of Item 601 of Regulation S-K, in lieu of filing such as an exhibit, American hereby agrees to furnish to the Commission upon request a copy of any agreement with respect to such long-term debt.

The following exhibits are included herein:

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Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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