What was found
DURING C4 CHECK, DISCOVERED CORROSION ON SEAT RAIL BETWEEN FS 64 AND FS 66+5, -Y1292. MAINTENANCE REMOVED CORROSION FROM SEAT RAIL AND FOUND RE-WORK TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-00-15. REMOVED CORRODED SEAT RAIL FROM FS 64 TO FS 66+5 IAW AIRBUS 320 SRM 51-42-11. INSTALLED NEW SEAT RAIL AND FASTENERS FROM FS 64 TO FS 66+5, -Y1292 IAW AIRBUS 320 SRM 51-42-11.