Conclusion Whilst orbiting at low-level it is likely that the aircraft entered a spin, although the possibility that the initial departure was a spiral dive could not be eliminated. It was not possible to determine the reason for the initial departure from controlled flight. It is likely that the pilot started to recover but tried to pitch up before the aircraft had built sufficient airspeed leading to a secondary spin. The pilot was wearing a kevlar flying helmet and it is likely this prevented him from suffering further serious injuries. There was no evidence of any mechanical fault which could have contributed to the accident.