As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOOR SUPPORT STRUCTURE RT FLOOR SILL AROUND FS319 HAS CORROSION (MARKED). C-CHECK RO 9/1/2020. REMOVED CORROSION ON FLOOR SUPPORT STRUCTURE RT FLOOR SILL AROUND FS319 REF CRJ-200-SRM. BLENDED AREA FOUND TO BE OUT OF LIMITS DUE TO 100% MATERIAL LOSS. REMOVED CORRODED SILL AND INSTALLED NEW RT FLOOR SILL P/N 601R31148-79 AT FS319 REF CRJ200 SRM DRAWING. SEE CONTINUATION CARD FOR DETAILS.