What happened
On August 18, 2013, a privately owned Beechcraft A36, registered JA4152, was conducting a familiarization flight from Matsumoto Airport to Ami Airfield. During the final approach to runway 27, the aircraft encountered unstable wind conditions, causing the plane to sink and the airspeed to drop significantly. The pilot noted that the stall warning system was active as the aircraft flew approximately 5 to 7 meters above the ground.
Fearing an overrun, the pilot initiated a go-around maneuver. While the pilot increased engine power, the aircraft failed to climb effectively. During this maneuver, the aircraft experienced a significant yaw to the left. The pilot attempted to correct the bank using only aileron inputs, neglecting the necessary rudder coordination. This lack of coordinated control led to a complete stall, causing the aircraft to roll and dip its left wing into the ground. The aircraft crashed into the grass on the south side of the airfield, resulting in four injuries (two serious and two minor). The aircraft was destroyed, though no fire occurred.
The investigation
The Japan Transport Safety Board (JTSB) examined the aircraft's engine power control system and fuel pump functionality. Investigators also reviewed handheld GPS data, pilot and passenger statements, and witness accounts from the airfield. The investigation focused on the flight dynamics during the low-speed approach and the pilot's specific control inputs during the transition to a go-around.