What was found
CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY RBL21 BS 727D - BS767; BS727C+2; BS727B+19; BS727A+19; BS727+16; BS727+19. MARKED. ; / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 727C+2' REMOVED 0.015' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING ATS TOOL ID ATS1225 S/N UNKNOWN; [02] VERIFIED CORRECTIVE ACTION ITEM 1. VERIFIED OUT OF LIMITS PER SRM 53-00-53-1A-2; [03] LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT P/N 146A7502-51 AT BS 727-767 RBL 21 WL 156 IAW SRM 51-40 05 AND DWG 146A7500.; [04] UPDATED PART USE; [05] VERIFIED CORRECTIVE ACTION 3