FlightFinder
Check my flight
Casualties unknown

Pilot encounters downdraft near Tooele, Utah (N1387V)

Tooele, UT, US

On August 7, 1986, a Boeing E75 (registration N1387V) was involved in an aviation accident near Tooele, UT. Investigators recorded the probable cause as: The pilot's failure to select an appropriate route around mountainous terrain while encountering adverse weather conditions. 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 2026-06-23Data APIEditorial standards

A pilot reported encountering a downdraft while crossing a ridgeline in mountainous terrain approximately five miles northeast of Tooele, Utah.

What happened

The pilot reported that he encountered a downdraft while crossing a ridgeline in mountainous terrain, approximately 5 miles northeast of Tooele, Utah. The elevation of the accident site was about 9,000 feet and the temperature was reported by the pilot to be 80 degrees. This would have resulted in a density altitude of about 12,500 feet. The pilot said he should have selected a route around the mountains.

Findings

The density altitude was approximately 12,500 feet due to high temperature and elevation. The pilot acknowledged that he should have selected a route around the mountains.

Probable cause

The pilot's failure to select an appropriate route around mountainous terrain while encountering adverse weather conditions.
Weather

Frequently asked questions

What happened in the 7 Aug 1986 Boeing E75 accident near Tooele, UT?

A pilot reported encountering a downdraft while crossing a ridgeline in mountainous terrain approximately five miles northeast of Tooele, Utah.

What aircraft was involved and where did it happen?

The accident on 7 Aug 1986 involved a Boeing E75, registration N1387V, at Tooele, UT.

What was the probable cause of the accident?

The pilot's failure to select an appropriate route around mountainous terrain while encountering adverse weather conditions.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X34455. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.