As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5093 - DURING CVG APPROACH RECEIVED A CABIN DOOR OUTER HANDLE MESSAGE, CREW DECLARED AN EMERGENCY AND PERFORMED QRH, ABORTED APPROACH THEN LANDED WITHOUT INCIDENT ON SECOND ATTEMPT. PERFORMED AN OPERATIONAL CHECK OF THE CABIN DOOR LOCKING MECHANISM, DISCREPANCY COULD NOT BE DUPLICATED BY MAINTENANCE.