What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK CORROSION WAS FOUND ON RT PROFILE IN AFT CARGO COMPARTMENT AT FR 51+17, STR 37 RT. MAINTENANCE CUT OUT DAMAGED SECTION OF PROFILE AT FR 51+17, STR 37 RT; FABRICATED A NEW REPLACEMENT SECTION OF PROFILE, A DOUBLER, AND SPLICE; INSTALLED REPAIR PARTS IAW AWA ER 26-5320-03154-SS1.