As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - DURING C6 CHECK DISCOVERED CORROSION ON SEAT TRACK AT Y765 AND FS 41+10" IN THE PASSENGER CABIN. CORROSION WAS FOUND TO BE OUT OF LIMITS. MAINTENANCE REMOVED AND INSTALLED NEW SEAT TRACK SECTION FROM FS 41 TO FS 47 AT Y765 IAW AIRBUS 320 SRM 51-72-11..