As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOORBEAM CAP ON LBL 27.00 IS CORRODED AROUND NUTPLATES ON THE INBOARD AND OUTBOARD EDGES BETWEEN FS 574.00 AND FS 621.00. C-CHECK RO 11/11/2020. REMOVED UNSERVICEABLE FLOORBEAM CAP ON LBL 27.00 BETWEEN FS 574.00 AND FS 621.00 AND INSTALLED SERVICEABLE FLOORBEAM CAP ON LBL 27.00 BETWEEN FS 574.00 AND FS 621.00, IAW CRJ200 SRM. NO WEIGHT AND BALANCE CHANGE, M-337 AND TASK CARD ATTACHED.