Casualties unknown

Farm Survey Flight Ends in Crash Near Wilbur Airport (N7155K)

Wilbur, WA, US

On May 22, 2001, a Piper PA-18-105 SPECIAL (registration N7155K) was involved in an aviation accident near Wilbur, WA. Investigators recorded the probable cause as: A collision with terrain for undetermined reasons. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

A farm survey flight ended in a crash midway between a private airstrip and Wilbur Airport. Post-accident examination found no mechanical issues, and toxicology tests were negative.

Flight Purpose and Sequence

The flight was intended to survey the farm's fields, with a pilot (one of the farm's owners and the aircraft owner) and a farm worker aboard. The passenger reported that the pilot fueled the aircraft before departure. After takeoff, they flew over fields northwest of the farm, starting in the north and working south. The passenger stated that after surveying all fields, they turned toward Wilbur Airport, which was the last thing he remembered.

Crash Site and Conditions

The crash site was located approximately midway between the Sheffels Ranch private airstrip (about 5 nautical miles north-northwest of Wilbur Airport) and Wilbur Airport. No other witnesses were identified. The accident occurred around local sunset. Nearby weather observation stations reported visual meteorological conditions with light to calm winds at the time.

Post-Accident Examinations

Examination of the aircraft wreckage indicated a relatively low-speed, right-wing-first impact with the terrain. No evidence of mechanical or structural problems with the aircraft or engine was found. An autopsy and toxicological tests revealed no significant underlying disease or impairing substances in the pilot.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20010608X01122. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.