As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK, COCKPIT FLOOR STA 265 LBL 3, PANEL IN FLOOR BULGED WITH PULLING RIVETS AT I/B END OF F/E SEAT TRACK. REMOVED AND REPLACED F/E SEAT TRACK SUPPORT IAW B-727 SRM 51-30-5/ 51-30-8/ 51-30-2. BULGING FOUND TO BE CORROSION OF F/E SEAT TRACK SUPPORT. CORRODED SECTION WAS OUT OF LIMITS IAW 727 SRM 53-10-1 FIG 1.