What happened
On July 20, 2020, during a glider competition, a pilot was flying an SZD-48-3 “Jantar Std. 3”, registration SP-3757, near Bukownica, Poland. After successfully completing an initial flight circuit, the pilot attempted a second circuit but was unable to find sufficient thermal lift due to deteriorating weather conditions and an approaching cold front.
As thermals ceased and local thunderstorms approached, the pilot was forced to perform an off-field landing. The pilot selected a large, recently plowed field and attempted to position the aircraft for a landing. During the approach, the pilot executed an unusual, tight turn at a very low altitude—descending from approximately 82 meters to just 49 meters above the ground—which resulted in the aircraft being oriented with the wind rather than into it.
The glider struck the hard, plowed surface on its main wheel at high speed. The impact was severe enough to cause the cockpit canopy to detach and the instrument panel to dislodge. Following this initial impact, the glider bounced and the nose dug into the soft soil, causing the aircraft to capsize onto its back. The pilot was able to unbuckle the harness and exit the cockpit without injury.
The investigation
The PKBWL investigation utilized flight data from an LX 10K onboard computer, the pilot's statement, meteorological data, and photographic evidence. The investigation examined the flight trajectory, the barometric altitude records, and the weather conditions, including the presence of a convergence line and potential wind gusts from nearby storms. The technical condition of the SZD-48-3 “Jantar Std. 3” was also reviewed, confirming that the aircraft's documentation and weight/balance were in compliance with regulations.