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GAA17CA110

2017-01-09 · Milton-Freewater, Oregon, United States · None · 1 aircraft · Status: Completed

Current FAA registration · N9598Z

Make / Model
CHRISTEN INDUSTRIES INC A-1
Year of manufacture
1989 · 28 years old at event
Engine
LYCOMING O&VO-360 SER (180 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19981103
ADS-B equipped
Yes — Mode-S AD599E

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's decision to take off from unsuitable terrain with a tailwind, which resulted in a nose-over.

Factual narrative

The pilot of a tailwheel-equipped airplane reported that while en route the engine had "slight roughness," so he decided to land in an open snow covered field on top of a hill to troubleshoot the issue. The pilot further reported that he was able to resolve the engine issue on the ground and decided to takeoff downhill with a tailwind. During the takeoff roll, the pilot reported that he "noticed [wind] gust on the tail," the main landing gear were "sucked down" in a one-foot snow drift, and the airplane nosed over. The left wing, fuselage, and vertical stabilizer sustained substantial damage. The pilot did not report any preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot of the tailwheel-equipped airplane reported that, while en route, the engine had "slight roughness," so he decided to land in an open snow-covered field on top of a hill to troubleshoot the issue. The pilot further reported that he resolved the engine issue on the ground and decided to take off downhill with a tailwind. During the takeoff roll, the pilot reported that he "noticed [wind] gust on the tail," the main landing gear were "sucked down" in a 1-ft-deep snow drift, and the airplane nosed over. The left wing, fuselage, and vertical stabilizer sustained substantial damage. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot - C
  • C Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-Snow/slush/ice covered surface-Decision related to condition - C
  • — Environmental issues-Conditions/weather/phenomena-Wind-Tailwind-Effect on operation

Verbatim from NTSB's published report. Source file NTSB_2017_GAA17CA110.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type. All research papers