What was found
DURING C-04 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER SURFACE OF FLOOR SUPPORT Y254, FR 16 TO FR 20. MAINTENANCE BLENDED OUT CORROSION AND FOUND MATERIAL LOSS TO BE OUT OF LIMITS; REMOVED DAMAGED FLOOR SUPPORT Y254, FR 16 TO FR 20; FABRICATED 4 EACH REPAIR ANGLES, AND A NEW REPLACEMENT FLOOR SUPPORT; INSTALLED REPAIR PARTS IAW A320 SRM 53-11-14 PG 211-212, FIG 202.