What was found
PHX - DISCOVERED THE LT INBOARD FLAP DELAMINATING, 20.5" BY 17.5", ADJACENT TO AND UNDERNEATH THE NR 5 SPOILER PANEL. MAINTENANCE REMOVED DELAMINATED CORE AND INNER SKIN IAW AMERICA WEST AIRLINES ENGINEERING REPAIR NR 19-5753-05275-HF1. FABRICATED FILLER AND DOUBLER IAW BOEING 757-200 SRM 51-70-10 AND AWA ER 19-5753-05275-HF1. BONDED REPAIR PARTS TO THE LT INBOARD TRAILING EDGE FLAP IAW AWA ER 19-5753-05275-HF1. TAP TEST WAS PERFORMED ON REPAIR AREA TO ENSURE NO DAMAGE EXISTED. THE T/E FLAP PANEL WAS PLACED ON MONITOR TO BE REPLACED NO LATER THAN THE NEXT C CHECK.