What was found
DURING HEAVY MAINTENANCE, CORROSION ON FLOOR SUPPORT DUMMY RAIL AT FR 16, Y503 , STR 23L; REMOVED CORROSION 1.0" L X 1.5" W X .055" D FROM ORIG, THICKNESS OF .160" FOUND TO BE OUT OF LIMITS PER SRM 53-11-14-283-004 REMOVED AND REPLACED FLOOR SUPPORT DUMMY RAIL AT Y503, FR 16, STR 23L IAW A320 SRM 51-72-11.