As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, DISCOVERED FORWARD CABIN FLOORBEAM AT FRAME 17 RT RBL 20 CORRODED ON TOP TEE. REPAIRED. HFEC INSPECTION CARRIED OUT CUT OUT DAMAGED AT 3 LOCATIONS AND FABRICATED FILLER. INSTALL FASTENERS AND BRACKETS. RESTORED FINISH. REPAIRED IAW E13-428-01.