What was found
DURING C-04 CHECK CORROSION WAS FOUND ON UPPER SURFACE OF AFT CARGO COMPARTMENT PROFILE BETWEEN FR 54 AND FR 55, RBL 711.2. MAINTENANCE CUT OUT DAMAGED SECTION OF PROFILE BETWEEN FR 54 AND FR 55, RBL 711.2; FABRICATED A REPAIR SPLICE AND NEW SECTION OF PROFILE; INSTALLED REPAIR PART IAW AWA ER 26-5320-03154-SS1.