As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL DD5 AT AFT SIDE FOUND TO BE CORRODED REMOVED PAX DOOR AFT INTERCOSTAL DD5 IAW CRJ 900 SRM 51-42-06-001-001-A01. LOCATED AND DRILLED NEW INTERCOSTAL P/N 601R31902-317A IAW CRJ 900 SRM 51-40-11-001-001-A01, INSTALLED NEW INTERCOSTAL IAW CRJ 900 SRM 51-42-06-001-001-A01