As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT, PILOT NOTED HIGH FREQUENCY VIBRATION IN TAIL ROTOR PEDALS AND UNCOMMANDED MOVEMENT IN T/R PEDALS. FOUND MOISTURE IN TAIL ROTOR SERVO PILOT VALVE AREA AND PILOT VALVE BOLTS STIFF TO ROTATE. DRIED AREA AND FREED BOLTS. TEMPERATURE DURING FLIGHT BELOW FREEZING.