What happened
The incident occurred during the takeoff roll of a light aircraft. As the airplane accelerated and approached its rotation airspeed, a critical error in control input disrupted the flight path. The pilot reported that the right-seat passenger accidentally pressed on the left rudder pedal at this crucial moment.
This unintended input caused the aircraft to yaw sharply 45 degrees to the left. Despite the pilot's efforts to correct the deviation and maintain directional control, the timing of the event was too late. The airplane could not be stabilized prior to liftoff, resulting in a ground loop upon or immediately after leaving the runway surface.
The investigation
Post-accident analysis focused on the sequence of events leading to the loss of control. Examination of the pilot's account confirmed that no mechanical failure or system malfunction was reported. The primary factor identified was the physical interference with the flight controls by a non-flying occupant in the right seat.
Findings
The investigation determined that the root cause of the accident was the passenger's inadvertent depression of the left rudder pedal. This action induced an uncommanded yaw to the left at a critical phase of flight where directional control is most sensitive. The pilot was unable to recover from this deviation before the aircraft became airborne or settled back onto the surface, leading to the ground loop.
Safety message
This accident highlights the importance of securing all loose items and ensuring that passengers do not interfere with flight controls during critical phases of flight such as takeoff and landing. It also underscores the need for clear communication between crew members regarding control inputs.