What was found
DURING C4 CHECK, DISCOVERED EXFOLIATION CORROSION LOCATED ON FLOOR SUPPORT FROM FS 19 TO FS 20, Y-254. MAINTENANCE REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-00-14. REMOVED FLOOR SUPPORT FROM FS 12 TO FS 24, Y-254 IAW AIRBUS 320 SRM 51-72-11. INSTALLED NEW FLOOR SUPPORT FROM FS 12 TO FS 24, Y-254 IAW AIRBUS 320 SRM 51-72-11.