As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR FLOOR SILL IS CORRODED BETWEEN F.S.1000 TO F.S.1047 INSTALLED NEW SERVICEABLE SILL LOWER WITH P/N MM670-35655-003 ON SURROUND STRUCTURE AFT CARGO DOOR, IAW CRJ900 SRM 51-42-21-001-001-A01, 51-42-13-001-001-A01 & 51-42-06-001-001-A01