What was found
TEB - DEPARTED AUGUSTA GA (AGS) AND CLIMBED TO 41,000 FEET AFTER APPROXIMATELY 5 MINUTES, ELEVATOR MISTRIM DOWN LIGHT CAME ON. CREW THEN FOUND ELEVATOR TRIM WAS FROZEN. WENT TO MANUAL MODE AND DIVERTED TO TETERSBORO, NJ. ON DESCENT INTO (KTEB) AT 6,000 FEET, SYSTEM BEGAN TO FUNCTION. INSPECTED ELEVATOR PITCH TRIM ACTUATORS. FOUND NO OBSTRUCTIONS TO PROPER FUNCTION. CLEANED AND LUBED ELEVATOR PITCH TRIM ACTUATORS PER MANUFACTURER'S RECOMMENDATION. LANDINGS, 1,239.