What was found
APU INTAKE LOWER NUTPLATE STRIP CORRODED INSIDE. REMOVED CORROSION ON APU INTAKE DOOR CUTOUT, LOWER NUTPLATE STRIP; BLENDED AREA 100 PERCENT MATERIAL LOSS AND OUT OF LIMITS PER SRM 53-80-05, FIG 101, DETAIL 5. FABRICATED SUPPORT ANGLE, LOCATED AND DRILLED PER SRM 51-40-05 AND 51-40-08. TREATED AND PRIMED PER SRM 51-20-01. INSTALLED NUTPLATE STRIP AND SUPPORT ANGLE PER SRM 51-40-02 AND 51-40-01. THIS REPAIR IS CLASSIFIED AS A CAT 'A" MAJOR REPAIR.