As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LBL 9 FLOOR BEAM CAP CORRODED AT FS 559-112 TO FS 621. C-CHECK RO 9/5/2020. INSTALLED A NEW SERVICEABLE FLOOR BEAM AT FS 559+112 TO FS 621.00, IAW CRJ 200 SRM AND BOMBARDIER REO. COMPLIED WITH FORM M337 AND NO CHANGE TO WEIGHT AND BALANCE.