As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE DRIVE GEAR`S, SPROCKET, RETAINING ROLL PIN HAD COME OFF, RESULTING OF SPROCKET TURNING FREELY ON ITS SHAFT. CONTROL KNOB UNABLE TO TURN THE DRIVE GEAR SPROCKET. TRIM TAB FROZE IN ACTUAL POSITION. RESULTING IN A RT WING HEAVY INCREASING WITH AIRSPEED.