What happened
On May 3, 2006, an Aeromot AMT-200 motor glider, registration JA201X, departed from Runway 01 at Tajima Aerodrome for a leisure flight to New Kitakyushu Airport. The aircraft was carrying a pilot and one passenger. Shortly after takeoff, while the aircraft was climbing, the pilot radioed an intention to return to the airfield.
As the aircraft reached the end of the runway, it performed a sharp right turn followed by an extremely steep left bank. During this maneuver, the aircraft's altitude was approximately 40 to 50 meters. The aircraft subsequently entered a left spin and impacted the ground in the overrun area north of the runway. The impact was followed by a significant fire that destroyed the airframe. Both occupants of the JA201X sustained fatal injuries.
The investigation
Investigators examined the wreckage, the engine, and the propeller pitch change mechanism. Eyewitness accounts from other pilots and airfield personnel provided critical context regarding the aircraft's flight path and engine sounds. Witnesses noted that the aircraft appeared to be climbing at a shallower angle than usual and emitted irregular noises that suggested engine instability.
Technical analysis focused on the aircraft's aerodynamic limits. Investigators calculated that at the aircraft's estimated airspeed, a bank angle of 60 degrees would significantly increase the stall speed. The investigation also reviewed the pilot's actions, specifically the decision to execute a steep turn at a very low altitude and the extension of the landing gear during the maneuver.