What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON FRAME 87 LOCATED BTW STR 28R TO STR 29R ON AFT CARGO COMPARTMENT. REPLACED FRAME 87 BETWEEN STR 26R TO STR 26R ON AFT CARGO COMPARTMENT IAW SRM 51-40-08 AND DRAWING 170-65180-445, 170-65110-453.