As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT SIDE SEAT RAIL FS 847 CORRODED. C-CHECK RO 10/9/2020. RT SIDE SEAT RAIL FS 847 CORROSION IS INCORRECT LOCATION CORROSION ACTUALLY LOCATED AT 830.40. ENTIRE SEAT RAIL SECTION REPLACED WHICH INCLUDES FS 847 AND FS 830.40. REPLACED RT SIDE SEAT RAIL WITH NEW, THAT COVERS FS 847, REF CRJ-900 AMM.