What was found
DURING INSPECTION, CRACKS WERE FOUND ON THE VERTICAL AND HORIZONTAL FLANGES OF NR 2 PYLON RT STIFFENERS (P/N:65B90415-6/-8) NEAR NAC STA 228. FOLLOWING REMOVAL OF THE DAMAGED STIFFENER SECTION, THE BULKHEAD STRAP (P/N:65B90412-38) WAS FOUND CRACKED AT A STIFFENER ATTACHMENT FASTENER HOLE. WHILE OPERATING REPAIR, 2EA EXISTING 2/16 INCH DIAMETER RIVET HOLES IN THE SKIN COMMON TO THE NEW UPPER REPAIR ANGLE OF STIFFENER (P/N:65B90415-6) WERE FOUND MIS-OVERSIZED TO 8/32 INCH DIAMETER. THE STIFFENERS WERE TRIMMED OFF, REPAIR ANGLES AND REPAIR FILLERS WERE INSTALLED AND THE CRACK WAS REMOVED. THE REPAIR WAS APPROVED UNDER BOEING SERVICE REQUEST 1-1979677748 ON ODA-300064-NM FAA FORM 8100-9 DATED SEPTEMBER 15, 2011.