What was found
DURING HEAVY MAINTENANCE CHECK, CORROSION WAS FOUND OUT OF LIMITS APPROX FS 400 LBL 5 ON MAIN CABIN FLOOR STRUCTURE. REMOVED CORROSION FROM FLOORBEAM IAW B727 SRM 511006. TRIMMED DAMAGED IAW B727 SRM 531008. FABRICATED REPAIR SPLICE FROM BAC 1505100617, BAC 14902785, BAC 14902831, BAC 15123353 AND BAC 15123396. TREATED AND PRIMED IAW B727 SRM 512002 MM 511002. INSTALLED IAW B727 SRM 513002 AND 531008.