Dansville, NY, USA
N90870
LET Blanik L-13
The flight instructor was conducting a glider familiarization flight with the private pilot, who had not flown in a glider for about 3 years. The private pilot entered the traffic pattern for the grass landing area adjacent to runway 14. The flight instructor stated that the private pilot was "a little reluctant" to remove the dive brakes and that the instructor removed them while on final approach at 600 feet above ground level. He further stated that the glider encountered a wind gradient that substantially reduced the glider's glide ratio. The glider subsequently landed short of the desired touchdown point and the left wing struck a tree. The glider came to rest about 100 feet before the runway. The private pilot stated that she felt the glider was "too high" until she turned onto the final approach path and realized it was actually "too low." Winds reported at the airport about the time of the accident were from 140 degrees at 15 knots.
On April 19, 2008, about 1600 eastern daylight time, a Let Blanik L-13 glider, N90870, was substantially damaged when it impacted terrain while landing at the Dansville Municipal Airport (DSV), Dansville, New York. The certificated flight instructor (CFI) and the certificated private pilot were not injured. Visual meteorological conditions prevailed and no flight plan had been filed for the local instructional flight conducted under 14 Code of Federal Regulations Part 91. The flight instructor was conducting a familiarization flight with the private pilot, who had not flown in a glider for about 3 years. According to the CFI, the glider was towed to an altitude of the 2,000 feet and released. The private pilot was flying and subsequently entered the traffic pattern for the grass landing area adjacent to runway 14, a 3,500-foot-long, by 100-foot-wide, asphalt runway. The turn from the base leg to the final approach course was performed at an altitude of approximately 700 feet above ground level (agl). The CFI stated that the private pilot was "a little reluctant" to remove the dive brakes and he removed them at 600 feet agl. He further stated: "At this point in the flight the runway touchdown point appeared ok, so we continued. As we approached approximately 200 [feet] agl we began to sink, so I was forced to take over the controls. We encountered a wind gradient which substantially reduced the glide ratio of the aircraft, which resulted in landing short of the desired touchdown point. The left-hand wind struck a tree which ground-looped the aircraft and we came to a full stop facing the opposite direction of landing...." The glider came to rest about 100 feet prior to the runway and sustained substantial damage to its left wing and fuselage. The private pilot stated that she felt the glider was "too high" until she turned onto the final approach path and realized it was "too low." The CFI reported 7,679 hours of total flight experience which included 145 hours in gliders. The private pilot reported 300 hours of total flight experience, all in gliders. Neither pilot reported any mechanical malfunctions of the glider during the accident flight. A weather observation taken at DSV, at 1554, reported: wind from 140 degrees at 15 knots, visibility 10 statute miles, clear skies, temperature 29 degrees Celsius (C), dew point 2 degrees C, altimeter 29.82 inches of mercury.
The pilot's failure to attain the proper glide path and the flight instructor's delayed remedial action. Contributing to the accident was the encountered headwind.
Source: NTSB Aviation Accident Database
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