As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FLOOR SEAT RAIL AT LBL 9.00 FROM FS 349.00 TO FS 477.00 CPAX. FLOOR SEAT RAIL AT LBL 9.00 FROM FS 349.00 TO FS 477.00 CPAX WERE EVALUATED OUT OF LIMITS PER CRJ900 SRM 53-21-49-101-001-A01 AND WERE REPLACED PER CRJ900 AMM 53-00-49 (CONFIG A12)