What was found
MCN - MAJOR REPAIR - DURING C-04 CHECK CORROSION WAS FOUND ON UPPER SURFACE AND LOWER SURFACE NUT PLATES OF R-2 DOOR SHAPE SILL BETWEEN FR 66 AND FR 68, Y1502 RIGHT. MAINTENANCE CUT OUT 3 EACH SECTIONS OF R-2 DOOR SHAPE SILL BETWEEN FR 66 AND FR 68, Y1502 RIGHT; FABRICATED 3 EACH FILLERS AND A REPAIR PLATE; INSTALLED REPAIR PARTS IAW A320 53-41-14, FIG 201 PG 202-212.