As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON SEAT RAIL RBL 9, LBL9 AND LBL27 BTW FS485.00 TO FS693.00 ON PASSENGER COMPARTMENT FLOOR STRUCTURE. SEAT RAIL RBL 9, LBL9 AND LBL27 BTW FS485.00 TO FS693.00 ON PASSENGER COMPARTMENT FLOOR STRUCTURE WERE EVALUATED OUT OF LIMITS PER CRJ-900 SRM 53-31-49-101-001-A02 AND WERE REPLACED PER CRJ900 AMM 53-00-49 (CONFIG A12)