What was found
CORROSION ON AFT SHIELD AT FWD CARGO BAY BS500 - 500A RBL23. EVALUATED AFT SHIELD AT FWD CARGO BAY BTW BS500 - BS500A; RBL23; FOUND TO BE OUT LIMITS DUE NOT LIMITS ON SRM. REMOVED AFT SHIELD AT FWD CARGO BAY BTW BS 500 - 500A; RBL23. IAW. 51-40-02-0G-0. LOCATED AND DRILLED NEW AFT SHIELD AT FWD CARGO BAY BTW BS500 - BS500A; RBL23 I.A.W SRM 51-40-05-0G-0 AND DWG 143A8126 . INSTALLED FCB AFT SHIELD BS 500 - 500C RBL23 IAW SRM 51-40-02 AND DWG # 143A0080.