As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
U-CHANNEL IS CORRODED UNDER WEB AT FWD CARGO DOOR SURROUND BS 490, RBL 29. U-CHANNEL FOUND TO HAVE 100% MATERIAL LOSS AT FWD CARGO DOOR SURROUND. REMOVED & REPLACED THE CHANNEL IAW SRM 51-40-05 FIG 2, SRM 51-40-02 FIG 12 & DWG 143T5018.