NEW YORK (Standard&Poor's) March 2, 2015--Standard&Poor's Ratings Services today assigned its preliminary 'A (sf)' rating to American Airlines Inc.'s series 2015-1 class A pass-through certificates (with an expected maturity of May 1, 2027). At the same time, we assigned our preliminary 'BBB (sf)' rating to the company's series 2015-1 class B pass-through certificates (with an expected maturity of May 1, 2023). The final legal maturities will be 18 months after the expected maturities. American Airlines is issuing the certificates under a Rule 415 shelf registration. We will assign final ratings upon the completion of our legal and structural review. We base the preliminary ratings on the credit quality of American Airlines' parent, American Airlines Group Inc.