What happened
On 31 March 2001, a Rans S6-116 Super 6, registration G-BYPZ, was preparing for departure from North Coates Airfield in Lincolnshire. While taxiing to Runway 24, the pilot began a backtrack along the grass runway. At the time, the pilot estimated surface winds to be 240° at 15 knots.
During this maneuver, the pilot maintained a forward position on the control column with neutral ailerons. However, a sudden gust of wind lifted the tail of the aircraft, causing the propeller to strike the ground. This impact initiated a pitch-over motion that resulted in the aircraft coming to rest in an inverted position on the runway. The pilot, who was the sole occupant, sustained minor injuries and was able to exit the aircraft safely.
The investigation
Investigators examined the circumstances surrounding the wind conditions and the aircraft's movement during the backtrack. While the pilot's initial estimate suggested 15-knot winds, official Met Office aftercast data revealed significantly stronger conditions. The recorded surface winds were from 210° at 20 to 25 knots, with gusts reaching 30 to 35 knots.
Findings
- The aircraft sustained damage to the propeller and the cabin roof glazing.
- The primary cause of the accident was a strong wind gust that lifted the tail of the aircraft while it was backtracking on the grass runway.