As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*L/H SIDE SEAT RAIL SUPPORT STRUCTURE (HAT CHANNEL) HAS 2EA AREAS OF CORROSION FROM FS 785.15 TO FS 847+16 MARKED WITH RED GREASE PENCIL. (C-CHECK) RO 5/10/2020 INSTALLED NEW L/H SIDE RAIL SUPPORT STRUCTURE (HAT CHANNEL AT FS785.15-FS847+16 REF: CRJ 900, AMM