What was found
MCN - MAJOR REPAIR - DURING B-04 CHECK EXFOLIATION CORROSION WAS FOUND ON LOWER SILL AT FR 66, Y1732 RT, FORWARD OF R-2 DOOR. MAINTENANCE REMOVED R-2 DOOR LOWER SILL AT FR 66, Y1732 RT; FABRICATED A NEW REPLACEMENT LOWER SILL; INSTALLED REPAIR PART IAW A320 SRM 51-42-11, FIG 9-14, 16 & 17, PG 6, 7-10 & 12.