What was found
ENROUTE, AT CRUISE ALTITUDE OF 5000 FT AIRCRAFT STARTED TO TURN RT, DISENGAGED AUTO-PILOT, TURN STILL EXISTED. DIVERTED TO TOL AND LANDED WITHOUT INCIDENT. AIRCRAFT CURRENTLY IN MAINTENANCE. CAUSE UNKNOWN AT THIS TIME. 09-03-07 ALL CONTROL RUDDER, AILERON AND FLAP TRAVELS CHECKED ALL CABLE RUNS AND TENSIONS CHECKED GOOD. STATIC RIGGING CHECKED GOOD, FIRST FLIGHT CHECK HAD SAME TURNING TO THE RIGHT ISSUE. CREW TRIMMED UP RUDDER AND AILERON FOR STRAIGHT AND LEVEL FLIGHT. MAINTENANCE CREW RESET TRIM INDICATIONS FOR FLIGHT NEUTRAL, NEXT FLIGHT CHECK SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.