As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN FLIGHT AT FLIGHT LEVEL 230 ELEVATOR TRIM BECAME VERY ERRATIC. DISCONNECTED TRIM AND AUTOPILOT. TRIM WHEEL BECAME VERY HARD TO TURN. REMOVED MOISTURE FROM LEFT AND RIGHT ELEVATOR TRIM ACTUATORS. CYCLED ELEVATOR TRIM FULL TRAVEL. OPS CHECK GOOD.