As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON SUBTHRESHOLD WEB AT FWD CARGO BAY BS440 - BS490 RBL27 WL157. / REMOVED CORROSION AT FCB SUB THRESHOLD WEB BS440-490 RBL27 L=3' W=2.4' ORIGINAL THICKNESS 0.045'; MATERIAL LOSS MORE THAN 50% FOUND TO BE OUT OF LIMITS IAW SRM 53-30-15-1A-1. REMOVED AND REPLACED FCB SUB THRESHOLD WEB BS440-492.4 P/N 7530597 PO #799108 IAW SRM 51-40-02 REF DWG 143A8330 89004U 29JUL20