What was found
DURING C4 CHECK DISCOVERED, GALVANIC CORROSION LOCATED ON FLOORBEAM AT FR 68, Y-1292. MAINTENANCE REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS IAW AIRBUS 320 SRM 53-00-14. REMOVED FLOORBEAM AT FR68, Y-1292 IAW AIRBUS 320 SRM 51-72-11. INSTALLED NEW FLOORBEAM AT FR68, Y-1292 IAW AIRBUS 320 SRM 51-72-11.