As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING BC-4 CHECK, EXFOLIATION CORROSION WAS FOUND AT NUT PLATE HOLE ON FORWARD INBOARD CORNER OF R-2 DOOR SILL AT FS 66. MAINTENANCE CUTOUT CORRODED NUT PLATE HOLE ON R-2 DOOR SILL AT FS 66; FABRICATED A REPAIR ANGLE AND FILLER; INSTALLED REPAIR PARTS IAW ER 26-5341-04279-RC2.