What was found
DURING C4 CHECK, DISCOVERED EXFOLIATION CORROSION LOCATED ON FLOORBEAM AT FR 68, Y1292. MAINTENANCE REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-00-14. REMOVED FLOORBEAM AT FR68, Y1292 IAW AIRBUS 320 SRM 51-72-11. INSTALLED NEW FLOORBEAM AT FR68, Y1292 IAW AIRBUS 320 SRM 51-72-11.