What happened
On May 20, 2002, a Glasflügel Kestrel glider was participating in a local cross-country competition starting from Sinsheim. After a flight duration of approximately five hours, the pilot was unable to return to the original base and landed at the Bensheim glider airfield. To complete the mission, the pilot initiated a new tow flight at 16:50 UTC to return to Sinsheim.
While approaching Sinsheim near the village of Hoffenheim, the pilot determined that the remaining altitude was insufficient to reach the airfield 4 km away. Consequently, the decision was made to perform an outlanding in a nearby field. During the maneuver, the left wingtip made contact with the ground, causing the aircraft to capsize violently. The pilot sustained fatal injuries, and the aircraft was destroyed.
The investigation
The BFU examined the wreckage and analyzed data from a GPS unit carried on board. The investigation established that the accident site was a flat field on the northwestern edge of Hoffenheim. Impact marks from the fuselage and the left wingtip were found approximately 8 meters apart, confirming the aircraft overturned after the initial wing strike. The investigation found that the cockpit area was destroyed, the wing assembly was torn from the fuselage, and the fuselage tube fractured.
Technical examination of the Glasflügel Kestrel revealed no mechanical defects; all structural failures were attributed to the impact. The investigation also noted that the pilot's altimeter was set to 1020 hPa, while the actual atmospheric pressure (QNH) was 1015 hPa, meaning the pilot had to estimate the true height above ground. No medical evidence suggested any health impairment of the pilot during the flight.
Findings
- The decision to initiate the outlanding was made too late, despite terrain conditions being suitable for an earlier landing.
- The pilot misjudged the altitude and obstacle clearance during a turning maneuver intended to reach the field.
- The left wingtip struck the ground during the turn, triggering the fatal rollover.