As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C4 S1 C CHECK INSPECTION REPORTED SURFACE CORROSION ON AFT CARGO BAY FLOOR FRAME STRAP UPPER SURFACE AT FLOOR STRAP 2243 FRAME 56. MAINTENANCE REMOVED AND REPLACED FLOOR STRAP IN ACCORDANCE WITH SRM 51-72-11. UPON COMPLETION OF THE REPAIR IT WAS INSPECTED AND FOUND ACCEPTABLE.