What was found
DURING C4 CHECK, DISCOVERED CORROSION AT LONGITUDINAL FLOOR SUPPORT, LOCATED AT -Y81, FR 14. NO ALLOWABLE LIMITS FOUND. MAINTENANCE REMOVED FLOOR SUPPORT AT -Y81, FR 14 IAW AIRBUS SRM 51-42-11. INSTALLED NEW FLOOR AT -Y81, FS 14 BEAM IAW AIRBUS SRM 51-42-11.