As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TO REMOVAL NLG AFT DOOR, WAS FOUND CORROSION ON NLG AFT DOOR HINGE FITTINGS BORE. (FUSELAGE AREA). NLG AFT DOOR HINGE FITTINGS BORE WAS FOUND DUE TO EXCESSIVE ALLOWABLE DAMAGE AND WERE REPLACED PER CRJ900 SRM 53-00-00-101-001-A01 AND SRM 51-42-21-001-001-A01