As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN AVIONICS BAY DOOR SURROUND FWD INTERCOSTAL #4 FROM FAR LEFT TO FAR RIGHT IS CORRODED. REMOVED AND REPLACED MAIN AVIONICS BAY DOOR SURROUND FWD INTERCOSTAL #4 FROM FAR LEFT TO FAR RIGHT IAW CRJ 900 SRM 51-40-11-001-001-A01 AND 51-42-21-001-001-A01.