What was found
DURING BC-4 CHECK, EXFOLIATION CORROSION WAS FOUND ON L-2 DOOR SILL AT FORWARD INBOARD CORNER FS 66. MAINTENANCE REMOVED DAMAGED AREA OF L-2 DOOR SILL AT FS 66; FABRICATED A FILLER AND 2 EACH REPAIR ANGLES; INSTALLED REPAIR PARTS IAW A320 SRM 53-41-14, FIG 201.