As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT CARGO FLOOR SILL IS CRACKED AT FS 589 AND CORRODED AROUND SEVERAL NUTPLATE HOLES. C-CHECK RO 8/29/2020. REMOVED DAMAGED LT SILL AND INSTALLED NEW SERVICEABLE FLOOR SILL IAW CRJ 200 SRM AND BOMBARDIER REO. WEIGHT AND BALANCE NOT EFFECTED. COMPLIED WITH M-337.