What was found
AT D-CK, FOUND CORROSION ON CENTER WING LOWER SKIN EXTERIOR STA 740 BLL 40 TO BLL 12. REMOVED FASTENERS AND CORROSION, FOUND OUT OF LIMITS. FLAP PEENED BLENDED AREAS ON LOWER SKIN. FABRICATED AND INSTALLED INTERNAL REPAIR AT FWD LOWER CHORD STA 740 LBL 10 TO LBL 45 PER B727 SRM 51-10-1. REF: N/R 3766.