NEW YORK (Standard&Poor's CreditWire) March 24, 1999--Standard&Poor's today revised its outlook on AMR Corp. and unit, American Airlines Inc. to stable from positive, and affirmed its ratings on both companies. (see list below). About $8.7 billion of debt is affected. The outlook revision is based on lost revenues and added costs as a result of a dispute with American Airlines' pilots over American's acquisition of Reno Air Inc., with the potential for further difficulties when the pilot contract becomes amendable in August 2001. The outlook revision also reflects an acceleration of ongoing share repurchases by AMR Corp. despite weaker earnings, and a softening of revenues in the trans-Atlantic and Latin American markets, where American has a