As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C3 CHECK DISCOVERED CORROSION ON SEAT TRACK AT FS 44 TO FS 46+16", LT INBOARD SIDE AT 4 PLACES. CORROSION WAS FOUND TO BE OUT OF LIMITS IAW A320 SRM 53-31-15 FIG 103. MAINTENANCE REMOVED AND INSTALLED NEW LT INBOARD SEAT TRACK FROM FS 41 TO FS 47 IAW A320 SRM 51-72-11.