Incident Overview
On July 1, 1993, a glider pilot from the Vilnius Aero Club departed from Palukne Aerodrome at approximately 16:00 local time on a solo cross-country flight in an L-13 Blanik glider (registration LY-GAP). The pilot failed to account for a change in wind direction, causing the glider to drift away from the aerodrome. Subsequently, the pilot decided to land in an unprepared field. During the landing roll, the right wing struck a power line support pole, resulting in damage to the glider.
Aircraft and Pilot Information
The glider, an L-13 Blanik with serial number 026948, was manufactured on July 8, 1977, and belonged to the Vilnius Aero Club. It had accumulated a total of 2,321 flight hours as of the incident date. The last major repair was conducted on October 3, 1985, at the Prienai ESAG facility, which extended the service life to 1,000 hours.
The pilot had been a member of the Vilnius Aero Club since 1992 and had logged 19 hours and 23 minutes on the L-13 Blanik type. In 1993 prior to the incident, the pilot had flown 3 hours and 13 minutes.
Weather Conditions
At the time of the incident, weather conditions were clear with visibility of 10 km. Wind was from 300–340°, atmospheric pressure was 742 mmHg, temperature was +17°C, and moderate turbulence was reported. Another L-13 Blanik glider was performing exercises in the area, and the flight period was considered suitable for flying.
Investigation Findings
The investigation commission identified several deficiencies, including a low level of flight organization, low pilot training standards, and personal indiscipline among pilots. The commission concluded that the pilot did not properly evaluate wind direction and strength when selecting a landing field from the air. The landing direction was essentially downwind, and the chosen field was unsuitable. Additionally, the pilot did not remain within the assigned zone boundaries.
Recommendations
The commission proposed that when organizing flights, the flight director should have an observer from among the sportsmen to maintain continuous awareness of the airborne situation. It also recommended that the Vilnius Aero Club management place greater emphasis on discipline and order among personnel, and improve pilot training, particularly in the selection of landing fields from the air. The damaged glider was deemed unsuitable for repair under aerodrome conditions and was recommended for repair at the Prienai State Sport Aviation Factory.