As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LH SIDE SEAT RAIL FS 661.00+16 TO FS 672 CORRODED SEVERAL PLACES. (C-CHECK) RO 2/1/2021 INSTALLED NEW SEAT TRACK IN MAIN CABIN AT FS661.00+16 TO FS672.00 ON LEFTHAND SIDE IAW CRJ / 900 AMM 53-00-49-400-801 (CONFIG A07) (SEE CONTINUATION FOR FURTHER DETAILS)