As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CABIN FLOOR WET AREA, BS 1661 FLOORBEAM UPPER TEE HAS AREAS OF CORROSION, CENTERLINE TO RBL56. REMOVED DAMAGED SECTION OF TEE AND FABRICATED A NEW TEE, SPLICE ANGLES AND STRAPS AND INSTALLED PER SRM 53-00-51, REPAIR 3. MAJOR REPAIR.