Casualties unknown

1986-07-01: Piper PA-25-260 (N9621P) — Rexburg, ID

Rexburg, ID, US

On July 1, 1986, a Piper PA-25-260 (registration N9621P) was involved in an aviation accident near Rexburg, ID. Investigators recorded the probable cause as: The pilot's inability to maintain altitude due to a severe downdraft during an aerial application turn, which led to controlled flight into terrain and subsequent destruction by fire. 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 1781061362Data APIEditorial standards

During an aerial application turn, the aircraft encountered a severe downdraft that prevented climb despite full power and dumping chemicals. The plane struck the ground flat and was destroyed by post-impact fire.

What happened

The incident occurred while the aircraft was engaged in an aerial application mission. During one of the turns required for this operation, the pilot encountered a severe downdraft that significantly impacted the aircraft's ability to maintain altitude.

In response to the sudden loss of lift, the pilot took immediate corrective actions. The pilot lowered the nose of the aircraft to gain airspeed, leveled the wings to stabilize the attitude, and applied full power in an attempt to climb out of the downdraft. Additionally, the pilot dumped the chemical load to reduce weight.

Despite these efforts, the aircraft was unable to overcome the downward force of the weather phenomenon. The aircraft subsequently struck the ground in a hard, flat attitude. Upon impact, the aircraft was totally consumed by a post-impact fire, resulting in total destruction of the airframe.

Probable cause

The pilot's inability to maintain altitude due to a severe downdraft during an aerial application turn, which led to controlled flight into terrain and subsequent destruction by fire.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34322. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.