As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL DD6 IS CORRODED. LOCATED AND DRILLED PAX DOOR DD6 MID INTERCOSTAL IAW CRJ900 SRM 51-40-11-001-001-A01 PN: 601R318057-1. INSTALLED NEW SERVICEABLE PAX DOOR DD6 MID INTERCOSTAL IAW CRJ900 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01