What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON AFT CABIN FLOOR BEAM Y1292 FRAME 68 STR 23LH; REMOVED AND REPLACED FLOORBEAM FROM FR68 TO FR 69 AT Y1292 STR 23 LH AFT CABIM IAW A320 SRM 51-72-11, 53-41-14 FIG 001, 53-00-14-283-002.