As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOORBEAM BS 1640, LBL 58 TO RBL 58 HAS AREA OF CORROSION AROUND SCREW HOLES. REMOVED CORROSION IAW SRM 51-10-02. FOUND TO BE OUT OF LIMITS IAW SRM 53-00-51, FIG 101, DETAIL 2. REMOVED AND REPLACED FLOORBEAM IAW SRM 51-40-02 AND DWG 146N5089. CAT. "A" MAJOR REPAIR.