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N105DN accident description

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Crash location 35.312778°N, 82.433333°W
Nearest city Hendersonville, NC
35.318728°N, 82.460953°W
1.6 miles away
Tail number N105DN
Accident date 30 Oct 2004
Aircraft type David Nielson Ison Hi-Max 1700
Additional details: None

NTSB Factual Report

On October 30, 2004, at 1045 eastern daylight time, N105DN, a David Nielson Ison Hi-Max 1700 amateur-built experimental airplane, registered to a private individual, and operated by the private pilot collided with the ground shortly after takeoff from runway 14 at Air Museum Airport, Hendersonville, North Carolina. The flight was operated under the provisions of Title 14 CFR Part 91 and visual flight rules. Visual meteorological conditions prevailed and no flight plan was filed for the local test flight. The pilot received serious injuries and the airplane sustained substantial damage. The flight was originating at the time of the accident on October 30, 2004, at 1040.

According to the pilot, the wind had increased to approximately 25 knots. Climb out was normal but with the increased wind, the airplane was increasingly harder to control. After turning crosswind at about 100 feet altitude, the airplane was caught in a wind shear, and he could not handle the airplane. The airplane collided with the ground in a flat plane.

According to several witnesses, the airplane took off from runway 14. Witnesses stated that the winds were calm and at approximately 100 feet above ground level, the airplane banked 50 degrees left, the left wing dropped, and the airplane spun to the left about one-half turn before colliding with the ground. Witnesses stated that this was the airplane's first test flight.

The nearest weather reporting facility at the time of the accident was Ashville, North Carolina. The 1054 surface weather observation was: sky clear, visibility 5-statute miles, temperature 17-degrees Celsius, dew point temperature 15-degrees Celsius, wind 0-degrees at 0 knots, and altimeter 30.05. Visual meteorological conditions prevailed at the time of the accident.

Examination of the wreckage found that the airplane collided with the ground in a steep nose down attitude. The engine and cockpit were observed pointing upward and crushed aft. Both wings were bent forward and separated from their aft attachment point to the fuselage. The pilot did not report a mechanical problem with the airplane.

NTSB Probable Cause

The pilot's failure to maintain airspeed which resulted in an inadvertent stall/spin and subsequent in-flight collision with terrain.

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