As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO DOOR SILL IS CORRODED FROM FS 1000 TO FS 1047. CORRECTIVE ACTION: REMOVED CORRODED DOOR SILL. REPLACED AFT CARGO DOOR SILL P/N MM670-35655-003 WITH NEW BETWEEN FS 1000 TO FS 1047 IAW CRJ 900 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01