Casualties unknown

Agricultural Aircraft Stalls During Turn, Collides with Ground (N4970J)

Big Timber, MT, US

On June 22, 1988, a Cessna T188C (registration N4970J) operated by Yellowstone Air Service was involved in an aviation accident near Big Timber, MT. 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 pilot spraying barley fields with 2,4-D reported the aircraft settled and stalled while turning, leading to ground collision. No engine power loss was found upon disassembly.

Accident Details

The pilot of an agricultural aircraft was spraying 2,4-D on two barley fields. After completing the first field, the pilot began turning the aircraft to commence spraying the second field. During the turn, the aircraft began to settle. The pilot attempted to avoid ground contact, but the aircraft stalled and collided with the ground.

Pilot's Statements

In a telephone conversation on the day of the accident, the pilot stated there was nothing wrong with the aircraft or engine, and that he "just must have hit 'dead air'" (which he described as a downdraft or tailwind). Several days after the accident, the pilot reported that in his opinion, the engine was not producing power at the time of the accident.

Engine Examination

The engine was subsequently disassembled and examined. No evidence to support a loss of power was found.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X25933. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.