As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A C-CHECK IN MCN, THE FASTENERS UNDER THE CABIN FLOORBOARD AT FS 333 APPROXMATELY RBL 7-9 WERE FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE IS REMOVING AND REPLACING THE FASTENERS UNDER THE CABIN FLOORBOARD AT FS 333, APPROXIMATELY RBL 7-9 IAW CRJ SRM 51-42-00. (M)