As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5364 - DURING GSP APPROACH RECEIVED A LEFT THRUST REVERSER UNLOCK MESSAGE, CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. PERFORMED OPERATIONAL TEST OF THE LEFT THRUST REVERSER, NO DEFECTS NOTED, DISCREPANCY COULD NOT BE DUPLICATED.