What was found
CORROSION ON SUBTHRESHOLD WEB AT FWD CARGO BAY BS 454 - 476, RBL 28, WL 156. EVALUATED DAMAGE ON SUBTHRESHOLD WEB. ORIGINAL THICKNESS .045' DAMAGE REMOVED; .009' REMAINING THICKNESS .0036 L= 2' X W=1.2' DEPTH .009 DAMAGE EXCEED 10% OF ORIGINAL THICKNESS, FOUND TO BE OUT LIMITS IAW SRM 53-30-15-1A-1; 4.G.(12). REMOVED SUBTHRESHOLD WEB IAW SRM 51-40-02. LOCATED, DRILLED AND COUNTERSINK NEW SUBTHRESHOLD WEB IAW SRM 51-40-05-0G-0, SRM 51-40-08-0G-0 & DWG 143A8330. INSTALLED FCB SUBTHRESHOLD WEB IAW SRM 51-40-02-0G-0 PAR. 5 AND DWG 143A8330. INSTALLED FCB SUBTHRESHOLD WEB IAW SRM 51-40-02-0G-0 PAR. 5 & DWG 143A8330.