What was found
DURING HEAVY MAINTENANCE, FLOORBEAM Y503 HAD CORROSION AT ZONE 221, FRAME 16. REMOVED CORROSION ON FLOORBEAM Y503 FOUND TO BE OUT OF LIMITS ORIGINAL MATERIAL. 149" MATERIAL LOSS .065" REMOVED MATERIAL .084" LENGTH 2" X 2" IAW SRM 53-11-14, PG 125. REMOVED CORRODED FLOOR BEEM Y503 IAW SRM 51-42-11, PG 25 LOCATED DRILLED AND DEBURRED HOLES IAW A320-51-44-11. INSTALLED NEW FLOORBEAM Y503 AT FRAME 16 FORWARD CABIN IAW SRM 51-423-11, PG 25. THIS ITEM HAS BEEN CLASSIFIED AS LEVEL 2 CORROSION.