What was found
(AIRCRAFT NOT GROUNDED) (DEFECT DISCOVERED DURING AC HEAVY MX VISIT) NRC 1000-0053: 404-14 AFT CARGO COMPARTMENT FLOOR STRUCTURE, PROFILE AT STGR38LH FOUND CORRODED AT FR55 / AFT CARGO COMPARTMENT FLOOR STRUCTURE, PROFILE AT STGR38LH AT FR55 REPLACED IAW SRM 51-72-11-911-001 REV 158."