As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOOR WEB AT AIR GRILL, CORROSION FOUND ON UPPER SURFACE BS 1410 RBL 65. FOUND CORROSION OUT OF LIMITS. FABRICATED FORMED AND INSTALLED WEB IAW DWG 146N5590-8 AND SRM 53-60-13 SEC 46 FIG 1 ITEM 5. INSTALLED IAW SRM 51-40-02. MAJOR REPAIR.