As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL DD1A AT FWD SIDE FOUND TO BE CORRODED. REMOVED PAX DOOR FWD INTERCOSTAL DD1A IAW CRJ 900 SRM 51-42-06-001-001-A01. LOCATED AND DRILLED NEW INTERCOSTAL P/N 600-31902-260 IAW CRJ 900 SRM 51-40-11-001-001-A01, INSTALLED NEW INTERCOSTAL IAW CRJ 900 SRM 51-42-06-001-001-A01.