Exhibit 12 AMERICAN AIRLINES, INC. Computation of Ratio of Earnings to Fixed Charges (in millions) <Table> <Captions> Three Months Ended Nine Months Ended September 30, September 30, 2002 2001 2002 2001 <s> <c> <c> <c> <c> Earnings: Loss before income taxes and cumulative effect of accounting change $(1,336) $(525) $(2,856) $(1,281) Add: Total fixed charges (per below) 385 379 1,156 1,045 Less: Interest capitalized 21 35 62 109 Total loss before income taxes and cumulative effect of accounting change $ (972) $(181) $(1,762) $ (345) Fixed charges: Interest, including interest capitalized $ 129 $ 96 $ 379 $ 286 Portion of rental expense representative of the interest factor 254 281 773 756 Amortization of debt expense 2 2 4 3 Total fixed charges $ 385 $ 379 $ 1,156 $ 1,045 Coverage deficiency $ 1,357 $ 560 $ 2,918 $ 1,390 </Table> Note: In April 2001, the Board of Directors of American approved the guarantee by American of AMR's existing debt obligations. As of September 30, 2002, this guarantee covered approximately $634 million of unsecured debt and approximately $573 million of secured debt. The impact of these unconditional guarantees is not included in the above computation.