Chandler, AZ, USA
N124FG
Peter A. Geiser Lee/Geiser Nieuprt17
The airplane ground looped off the runway after encountering a crosswind and a sudden wind gust during landing rollout on runway 22R. The gust was from 330 degrees about 12 knots. The pilot lost directional control of his experimental biplane, and it veered off the runway. Thereafter, it ground looped and nosed over. The wind had been nearly calm when the pilot initiated the flight. No mechanical malfunction or failure was reported with the airplane. Eight minutes after the accident the local wind was reported from 300 degrees at 12 knots.
On March 26, 2005, about 0822 mountain standard time, a Lee/Geiser Nieuprt17, N124FG, encountered a gusty crosswind during landing rollout on runway 22R at the Chandler Municipal Airport, Chandler, Arizona. The airplane swerved off the runway, ground looped, nosed over and was substantially damaged. The private pilot owned and operated the experimental-homebuilt airplane, and he was not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal flight. The flight was performed under the provisions of 14 CFR Part 91, and it originated from Chandler about 0810. The pilot reported to the National Transportation Safety Board investigator that when he took off the local wind was nearly calm. However, during landing he encountered a wind gust that came out of nowhere, and he lost control of his conventional gear biplane. The pilot estimated that the gust was from 330 degrees at over 10 knots. Eight minutes later, at 0830, Chandler's reported weather indicated the wind was from 300 degrees at 12 knots, and no gusts were reported. The sky was clear, and the visibility was 40 miles. Runway 22R is 4,401 feet long and 75 feet wide. The pilot did not report experiencing any mechanical malfunction or failure with the airplane.
The pilot's inadequate compensation for the gusting crosswind condition and failure to maintain directional control during landing rollout.
Source: NTSB Aviation Accident Database
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