What was found
CORROSION ON PASSENGER CABIN AFT WET AREA MOP SILL AT RBL 54 BS 947+2, 947+4, 947+5, 947+8-947+13, 947+15, 967-987+6, 987+11. REMOVED CORROSION ON MOP SILL A.S.D. MATERIAL ORIGINAL .080 MATERIAL LOSS .040 MATERIAL REMAINING .040 AT BS 967 TO BS 987+6 FOUND TO BE OUT OF LIMITS PER SRM 53-70-15-1A-1;[02] VERIFIED OUT OF LIMITS PER SRM 53-70-15-1A-1. LOCATED AND DRILLED NEW MOP SILL P/N 147A8540U8ATSMRO AT AFT WET AREA RBL 54 BETWEEN BS 895 TO BS 1006 PER SRM 51-40-05 AND DWG 147A8540. OK TO INSTALL MOP SILL. VERIFIED CORRECTIVE ACTION 3. INSTALLED ASD MOPSILL IAW SRM 51-40-02 AND IAW DWG#147A8501 AND IAW DWG#147A0070.