As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION FOUND ON INNER CHORD P/N MM670-35670-001 UNDER AFT BAGGAGE DOOR SILL BETWEEN FS.1031.00 & FS.1045.00 (C-CHECK) RO 5/10/2020 REPLACED INNER CHORD UNDER AFT BAGGAGE BAY DOOR SILL BETWEEN FS1031 AND FS1045 REF BOMBARDIER DRAWING, CRJ900 SRM, AND CRJ900 SRM