NEW YORK (Standard&Poor's) March 5, 2013--Standard&Poor's Ratings Services said today that it has assigned its preliminary 'BBB-' (sf) rating to American Airlines Inc.'s series 2013-1 Class A pass-through certificates with an expected maturity of July 15, 2025, and its preliminary 'B+' (sf) rating to American's series 2013-1 Class B pass-through certificates with an expected maturity of Jan. 15, 2021. The final legal maturities will be 18 months after the expected maturity. We will assign final ratings after concluding a legal review of the documentation. The ratings are based on: The consolidated credit quality of American's parent, AMR Corp. (both rated 'D'); Our expectations regarding AMR's and American's likelihood of emerging from bankruptcy; Substantial collateral coverage by