Thursday, January 12, 2017

Christen A-1, N9598Z: Accident occurred January 09, 2017 in Milton-Freewater, Umatilla County, Oregon

Aviation Accident Final Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

Investigation Docket National Transportation Safety Board: https://dms.ntsb.gov/pubdms
 
NTSB Identification: GAA17CA110 
14 CFR Part 91: General Aviation
Accident occurred Monday, January 09, 2017 in Milton-Freewater, OR
Probable Cause Approval Date: 07/05/2017
Aircraft: CHRISTEN INDUSTRIES INC A 1, registration: N9598Z
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration
and/or the operator and did not travel in support of this investi
gation to prepare this aircraft accident report.

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.


The National Transportation Safety Board determines the probable cause(s) of this accident as follows:

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

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.

Aviation Accident Factual Report - National Transportation Safety Board: https://app.ntsb.gov/pdf

http://registry.faa.gov/N9598Z

FAA Flight Standards District Office: Spokane


NTSB Identification: GAA17CA110
14 CFR Part 91: General Aviation
Accident occurred Monday, January 09, 2017 in Milton-Freewater, OR
Aircraft: CHRISTEN INDUSTRIES INC A 1, registration: N9598Z
Injuries: 1 Uninjured.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

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.

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