What was found
DURING C-04 CHECK EXFOLIATION CORROSION WAS FOUND ON MAIN CABIN FLOORBEAM AFT OF FR 64, Y1292. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED MAIN CABIN FLOORBEAM FROM FR 66-67, Y1292; FABRICATED A NEW REPLACEMENT SECTION OF FLOORBEAM; INSTALLED REPAIR PART IAW A320 SRM 51-44-11, PG. 1-2, AND SRM 51-42-11, PG. 6-7, & 28-30.