Casualties unknown

Noninstrument-Rated Pilot Strikes Hillside After Entering Stratus Clouds (N8359H)

Yountville, CA, US

On February 27, 1990, a Piper PA28-201T (registration N8359H) operated by Fraser, Robert G. was involved in an aviation accident near Yountville, CA. Investigators recorded the probable cause as: THE PILOT USED POOR JUDGEMENT BY ATTEMPTING A V.F.R. FLIGHT TO AN AREA WITH FORECASTED INSTRUMENT METEOROLOGICAL CONDITIONS AND CONTINUING THE FLIGHT WHEN I.F.R. CONDITIONS WERE ENCOUNTERED. 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 2026-07-04Data APIEditorial standards

A noninstrument-rated pilot received an IFR briefing, then entered 500-foot stratus clouds with less than 1-mile visibility. The engine surged and the aircraft struck a hillside in level flight; no preexisting malfunctions were found.

Accident Overview

A noninstrument-rated pilot contacted flight service the day before the accident and requested and received an IFR briefing for the planned flight. The weather briefer provided the pilot with information that included IFR conditions at the destination airport area, which encompassed the accident site. The subsequent flight ended when the aircraft collided with a hillside.

Weather Conditions

Ground witnesses observed the airplane maneuvering in the accident area before it entered stratus clouds with a 500-foot ceiling. At the time, prevailing visibility was less than 1 mile.

Witness Observations

According to ground witnesses, the engine sound increased rapidly when the airplane entered the clouds. Approximately 2 seconds later, the aircraft collided with the side of a hill.

Aircraft Examination

Examination of the aircraft revealed that it struck the hillside in a level flight attitude. The propeller blades and hub assembly showed damage characteristics consistent with high power being developed at impact. No preexisting malfunctions or failures were noted.

Frequently asked questions

What happened in the 27 Feb 1990 Piper PA28-201T accident near Yountville, CA?

A noninstrument-rated pilot received an IFR briefing, then entered 500-foot stratus clouds with less than 1-mile visibility. The engine surged and the aircraft struck a hillside in level flight; no preexisting malfunctions were found.

What aircraft was involved and where did it happen?

The accident on 27 Feb 1990 involved a Piper PA28-201T, registration N8359H, operated by Fraser, Robert G., at Yountville, CA.

What was the probable cause of the accident?

THE PILOT USED POOR JUDGEMENT BY ATTEMPTING A V.F.R. FLIGHT TO AN AREA WITH FORECASTED INSTRUMENT METEOROLOGICAL CONDITIONS AND CONTINUING THE FLIGHT WHEN I.F.R. CONDITIONS WERE ENCOUNTERED.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X22584. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.