NEW YORK (Standard&Poor's CreditWire) September 22, 1999--Standard&Poor's today assigned preliminary ratings to American Airlines Inc.'s various classes of pass-through certificates series 1999-1. (See list below). Final ratings will be assigned upon completion of the review of legal documentation. The certificates are secured by equipment notes issued by American. The notes are secured debt by ten Boeing 737-823, three Boeing 767-323ER, and two Boeing 777-223IGW passenger jet aircraft delivered between June 1998 and September 1999. The preliminary ratings are based on: -- The corporate credit rating on AMR Corp. unit American Airlines Inc. (triple-'B'-minus/Stable/A-3); -- The availability of special protections under Section 1110 of the U.S. Bankruptcy Code to owners of equipment notes (and thus, indirectly, to