What was found
(CAN) WHEN CLIMBING THROUGH 12,000 FEET, PILOT REALIZED THERE WAS NO RUDDER TRIM INPUT WHEN WHEEL WAS TURNED. AIRCRAFT RETURNED TO BASE AND LANDED OVERWEIGHT. TAPER PIN THAT HOLD RUDDER WHEEL WAS FOUND DISLODGED. PIN WAS RE INSTALLED AN SECURED. OVERWEIGHT LANDING INSPECTION WAS CARRIED OUT AND AIRCRAFT RETURNED TO SERVICE. NOTE: NO PREVIOUS WORK WAS CARRIED OUT ON THIS SYSTEM.