As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5111 - RECEIVED PAX DOOR OUTER HANDLE WARNING MESSAGE. PERFORMED QRH, DID NOT RESET. DECLARED EMERGENCY, DIVERTED TO TYS AND LANDED WITHOUT INCIDENT. HANDLE WAS OBSERVED TO BE STOWED ON GROUND. REPLACED PROX SENSOR DI-17. NO FURTHER DEFECTS.