As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, FOUND FORWARD LAVATORY THRESHOLD HAD LIGHT CORROSION AROUND CLIP NUTS ON HAT CHANNEL. REMOVED AND REPLACED HAT CHANNEL AS PER SRM 51-10-1 P4 AND SRM 51-30-2. P/N 60-357 7075-T6 PO NR 9600125 SIZE OF THE CHANNEL 40 INCH AT FWD LAVATORY AREA LOWER THRESHOLD AREA.