What was found
DURING C-04 CHECK EXFOLIATION CORROSION WAS FOUND AROUND FASTENER HOLES OF AFT CABIN FLOORBEAM Y1292 L/H, FR 66 TO 68. MAINTENANCE REMOVED CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED AFT CABIN FLOORBEAM FROM FR 66-68, Y1292 L/H; FABRICATED A NEW REPLACEMENT SECTION OF FLOORBEAM; INSTALLED REPAIR PART IAW A320 SRM 51-42-11, PG. 29-30, 39-41, FIG. 18.