What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON (141-57) CENTER FUSELAGE III FLOOR STRUCTURE, CORROSION FOUND ON PREVIOUS SEAT TRACK REPAIR BTW FR 84-85 AND LBL 11''; REF NRC 4000173-2000-0173, SEAT TRACK REPAIR BTW FR 84-85 AND LBL11'' IAW SRM II 53-23-10, REPAIR 54, NO FURTHER ACTION REQUIRED, EC E14-349-01 APPLIED FOR ID PURPOSE.