What was found
(AIRCRAFT NOT GROUNDED) (DEFECT DISCOVERED DURING AC HEAVY MX) NRC 1000-0146: 031-26 (SM) AFT CARGO COMPARTMENT FLOOR STRUCTURE, CORROSION FOUND AT SECTION-CORNER BTW FRAME 58 TO FRAME 59 STRINGER 38L AREA / AT AFT CARGO COMPARTMENT FLOOR STRUCTURE, SECTION-CORNER REPLACED BTW FRAME 58 TO FRAME 59 STRINGER 38L AREA AS PER SRM 51-72-11-911-001 REV 159 PN:D5347047801000 PO: 4415432, RIVETS P/N: NAS1097AD4-5 PO: 1581866, MS20470AD5-5 PO: 2034157."