As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION, THE LEFT FLOOR SUPPORT WAS FOUND TO BE CORRODED BETWEEN BS 559.48 - 559.80. MAINTENANCE COMPLIED WITH ECTC/REO 601R-53-00-526 AND GENERIC REO 601R-53-00-526 AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.