What was found
CORROSION ON FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS727B+10; BS727C+2.5; BS727D+10; BS727E+6.5; BS757 - BS767; BS767+5; BS787+14. LBL21 WL156. ; / [01] EVALUATED CORROSION AT ALL LOCATIONS; FOUND DEEPEST LOCATION TO BE AT BS 767 REMOVED 0.010' IN A AREA OF 1'X1' ORIGINAL THICKNESS 0.040' FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-2 USING ATS TOOL ID ATS1225 S/N UNKNOWN; [02] VERIFIED CORRECTIVE ACTION STEP 1.; [03] LOCATED AND DRILLED NEW FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS 727 TO 847 LBL 21; WL 156 PER SRM 51-40-05-0G-0; AND DWG 146A7500; [04] VERIFIED CORRECTIVE ACTION 3.; [05] VERIFIED ALL STEPS COMPLETE.; [06] CORRECTION TO CORRECTIVE ACTION STEPS 1. IT SHOULD BE SRM 53-00-53-1A-2.