Incident Overview
During descent for landing, the flight crew experienced a temporary inadvertent deployment of the left engine thrust reverser. The flight crew declared an emergency and diverted to a nearby airport, where the airplane landed without further incident.
Investigation Findings
Examination of the thrust reverser control system revealed that if the thrust lever was moved aggressively to the aft stop, the left engine's thrust reverser switch could actuate. Additionally, faults were observed in the left main landing gear Ground/Flight (G/F) switch and the left engine thrust reverser deploy switch.
Corrective Actions
After the left main landing gear G/F switch and the thrust lever switchbox were replaced, the airplane's thrust reverser system tested "ok."