As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR FWD INTERCOSTAL DD3 IS CORRODED. REMOVED PAX DOOR DD3 INTERCOSTAL AT FWD SIDE IAW CRJ900 SRM 51-42-06-001-001-A01. LOCATED DRILLED AND INSTALLED NEW SERVICEABLE PAX DOOR INTERCOSTAL DD3 PN 601R318054-1 AT FWD SIDE IAW CRJ900 SRM 51-40-11-001-001-A01 AND 51-42-06-001-001-A01