As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAX DOOR INTERCOSTAL DD1 AT AFT SIDE FOUND TO BE CORRODED. EVALUATED AND FOUND TO BE OUT OF LIMITS IAW CRJ900 SRM 52-11-00-001-001-A01. REMOVED DD1 AT AFT SIDE IAW CRJ900 SRM 51-42-06-001-001-A01. LOCATED DRILLED AND INSTALLED NEW SERVICEABLE INTERCOSTAL P/N: 601R31902-318 IAW CRJ900 SRM 51-40-11-001-001-A01 AND 51-42-06-001-001-A01