What was found
MCI - DURING OP 15 MAINTENANCE CHECK, FOUND AFT LOWER FUSELAGE SKIN BULGED AND RIVET HEADS POPPED AND PULLED FORWARD OF FS 996 LONGERON 27L. REMOVED CORROSION PER SRM 51-10-3 PARA 31-42. REPLACED LONGERON END PER SRM 53-02 IFG 2A PAGE 3, 51-30-0 AND 51-30-02. (X)