As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON FLOOR STRUCTURE TRACK LEFT LOCATED FR 12-FR 20 AT FWD GALLEY AREA; REPLACED FLOORBEAM TRACK LOCATED AT FR12-20 LT SIDE IN PASSENGER CABIN IAW SRM 51-40-08 AND DRAWING 170-00822-503.