As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LT THRUST REVERSER UNLOCK CAUTION MESSAGE IN DESCENT OUT OF FL200. CREW DECLARED EMERGENCY AND LANDED WITHOUT FURTHER INCIDENT. MX TROUBLESHOT, R & R LT THRUST REVERSER PDU AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.