NEW YORK (Standard&Poor's) April 27, 2015--Standard&Poor's Ratings Services today assigned its 'B+' issue-level rating to American Airlines Inc.'s (B+/Positive/--) Trustees of the Tulsa Municipal Airport Trust Revenue bonds, Refunding Series 2015, due June 1, 2035. These bonds are being issued to refund the existing series 2000A revenue bonds, which, together with certain other bonds, financed or refinanced the construction or acquisition and installation of certain improvements and equipment at American's major aircraft and engine overhaul and maintenance facility at Tulsa International Airport. American Airlines Group Inc., American Airlines Inc.'s parent, guarantees the bonds. American's rentals under a sublease of the land and facilities from Tulsa Municipal Airport Trust (TMAT) are sufficient to pay the bonds' principal