What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON AFT CABIN FLOORBEAM Y-765 FR66 STR 23R; REMOVED AND REPLACED FLOORBEAM Y-765 FR66 STR23R IAW SRM 53-00-14-283-002, 53-41-15 FIG 001 WORK ACCOMPLISHED PER SERVICE ORDER NUMBER 440484-26658