Accident Details
On June 5, 2005, a SZD-48-3 Jantar STD3 glider operated by the Poznań Aero Club crashed while attempting to land in a field near Sarbinowo, Poland. The accident occurred during the first competition of the 50th Polish Standard Class Gliding Championships, held at Leszno Airport. The task was a 3-area race with a 2-hour duration, and conditions were challenging due to wind speeds of 18–26 km/h with gusts up to 60 km/h and active cumulonimbus clouds.
Flight and Landing
The 24-year-old pilot, with a total glider flight time of 203 hours and 32 minutes (including 170 hours as pilot-in-command and 23 hours and 52 minutes on the Jantar STD3), departed at 13:15 local time. After covering approximately 140 km, the pilot decided to land in an unprepared field due to a loss of thermal lift. The chosen field already contained several other competing gliders. The pilot executed a 180° turn approach; according to the flight logger, he began the turn at 140 m AGL and completed the final turn at 70 m AGL. During final approach, he performed a slip maneuver to adjust the descent profile. However, due to excessive vertical speed and the glider's inertia, the landing lacked a flare phase. The logger recorded a vertical speed of -4.5 m/s at 7 seconds before the nose dug in and the glider nosed over, sustaining damage that made repair uneconomical.
Damage and Rescue
The glider's fuselage was crushed forward of the attachment point, the tail boom was broken and separated along with the tailplane, the main frame geometry was distorted, and both elevator halves and the rudder were broken off, along with numerous other minor structural damages. The pilot was unable to exit the wreckage independently due to the cabin's orientation relative to the ground; other pilots and bystanders extracted him.
Probable Cause and Contributing Factors
The primary cause of the accident was the pilot's execution of a landing maneuver other than the appropriate one. Specifically, he performed a deep slip maneuver at low altitude, whereas a flat approach would have been more appropriate to allow correction of errors or the influence of other circumstances during landing in an unfamiliar field. A contributing factor was the presence of residual water ballast in the tanks at landing, which increased the glider's weight, wing loading, and inertia, indicating improper ballast management during the flight.