What happened
On 3 June 2001, a Bell P-63A-7BE (registration G-BTWR) was performing as part of a multi-aircraft air display at Biggin Hill Airport. The flight was part of a coordinated routine involving three World War II-era fighters. While the first two aircraft followed a set sequence, the Kingcobra was tasked with a more flexible role, performing individual manoeuvres between the other aircraft.
During the second day of the airshow, the pilot successfully completed several manoeuvres but experienced an initial loss of control during a rolling climb. Although the pilot managed to recover the aircraft, the display continued. Later in the sequence, the aircraft performed a flypast at approximately 192 kt before entering a final manoeuvre. At the apex of this manoeuvre, while in an inverted position, the aircraft experienced a significant yaw to the right and entered an upright incipient spin. The aircraft subsequently entered a steep dive and impacted the ground at approximately 160 kt. The impact resulted in 1 fatality and the total destruction of the aircraft.
The investigation
Investigators examined the wreckage and recovered various video recordings and photographs that allowed for a reconstruction of the flight. Analysis of the engine performance showed that the propeller was operating within its governed range, though the engine was running at a higher RPM than recommended, likely an attempt to regain airspeed. The investigation also reviewed the pilot's extensive flying history, noting his significant experience in display flying and his background with the Red Arrows.
Medical examinations of the pilot found no evidence of pre-existing disease, nor did toxicology reveal any substances that could have impaired his performance. The investigation also looked into the aircraft's maintenance history and the mechanical integrity of the flight controls, finding no evidence of mechanical failure or control jams prior to the impact.