As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCN - MAJOR REPAIR - DURING C4 CHECK DISCOVERED LEVEL 2 CORROSION ON THE LT INBOARD SEAT TRACK BETWEEN FS 41 AND FS 47 AND AT Y765. CORROSION WAS FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-31-15 FIG 103. MAINTENANCE REMOVED AND INSTALLED NEW SEAT TRACK ON THE LT INBOARD SEAT TRACK FROM FS 41 TO FS 47 AT Y765 IAW AIRBUS 320 SRM 51-72-11.