What was found
CORROSION ON AFT CARGO BAY INTERCOSTAL ANGLE BELOW SHIELD BS 767+10 RBL 21 WL 155. EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO ALLOWABLE LIMITS IN THE SRM AND REQUIRES REPLACEMENT PER SRM 51-10-02-0G-0. REMOVED ACB FWD SHIELD SUPPORT ANGLE IAW SRM 51-40-02-0G-0. LOCATED AND DRILLED NEW R/H ANGLE BELOW SHIELD IAW SRM 51-40-05-OG-0, DWG 146A0081 AND DWG 146A8123. SEALED AND INSTALLED A NEW FWD SHIELD INTERCOSTAL ANGLE IAW DWG 146A8123, 146A0081, AMM 51-31-00-390-801, AND SRM 51-40-02-0G-0.