What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON AFT CABIN DUMMY RAIL O/O OF Y254 FRAME 66 STR 23R; REMOVED CORROSION ON AFT CABIN DUMMY RAIL O/B Y254 FRAME 66 STR23R, VERIFIED BEYOND LIMITS, REMOVED AND REPLACED IAW SRM 53-00-14-283-002 AND 51-72-11. ALL WORK ACCOMPLISHED UNDER NR 440484/26662