As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON LOWER SILL AT AFT DOOR CARGO COMPARTMENT. LOWER SILL AT AFT DOOR CARGO COMPARTMENT WAS EVALUATE FOUND EXCESSIVE DAMAGE PER CRJ-900 SRM 51-10-06-001-001-A01 AND REPLACED PER CRJ-900 SRM 51-42-06-001-001-A01 , SRM 51-42-13-001-001-A01 AND SRM 51-42-21-001-001-A01