What was found
WHILE IN CRUISE FLIGHT, THE PILOT NOTED SEVERAL CAUTION PANEL WARNING LIGHTS HAD ILLUMINATED AND THE TRIM RELEASE SYSTEM HAD FAILED. THE PILOT ELECTED TO MAKE A PRECAUTIONARY LANDING AT THE CLOSEST AIRPORT. WHEN THE LANDING GEAR WAS SELECTED DOWN, NO INDICATIONS OF GEAR POSITION WERE VISIBLE. THE PILOT MADE A PASS BY THE TOWER TO VERIFY GEAR DOWN AND MADE AN UNEVENTFUL LANDING. COMPANY MAINTENANCE PERSONNEL WERE DISPATCHED TO THE AIRCRAFT TO MAKE REPAIRS. WITH THE ASSISTANCE OF THE AIRCRAFT MFG, THE PROBLEM WAS TROUBLE SHOT TO A CIRCUIT CARD IN THE A36 PANEL. THE CARD WAS REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE.