NY -- Standard&Poor's CreditWire 6/16/97 -- Standard&Poor's today has raised the corporate credit ratings and senior debt ratings of AMR Corp. and subsidiary American Airlines Inc. to triple-'B'-minus from double-'B'-plus (see table below for full list of rating changes), affecting about $5.8 billion of rated securities. The rating outlook is now stable. A triple-'B'-minus/'A-3' rating has been assigned to American Airlines' $1 billion unsecured bank facility due 2001. The upgrade is based on stronger industry fundamentals and American's reallocation of capacity to core markets and profitable international routes, which is resulting in improving earnings and cash flow. That, in turn, is allowing for a material reduction in debt and leases, with prospects for some further improvement