Casualties unknown

Aircraft Collides with Ridge After Fog-Delayed Departure (N7091Q)

Danville, CA, US

On July 19, 1995, a Cessna TU206 (registration N7091Q) operated by William R. Peterson was involved in an aviation accident near Danville, CA. Investigators recorded the probable cause as: The pilot's intentional flight into known adverse weather and failure to maintain proper altitude. 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 pilot delayed by fog departed when conditions improved, but later struck a mountain ridge obscured by low stratus, coming to rest 20-30 feet below the top.

Departure and Weather Conditions

The pilot's departure was delayed due to fog and low stratus conditions. Before takeoff, he advised ground control that he intended to cruise at 2,500 feet mean sea level (MSL) to his destination. He departed once the ceiling reached 1,000 feet overcast with 7 miles visibility.

En Route Communication

After departure, the pilot contacted departure control and reported level at 1,500 feet. He was advised to climb under visual flight rules (VFR) at his own discretion and to resume his own navigation.

Terrain and Collision

The pilot's planned route of flight crossed a mountain range with a peak elevation of 2,245 feet. Witnesses reported that the mountain was obscured by low stratus clouds at the time. The aircraft subsequently collided with the ridgeline approximately 20 to 30 feet below the summit.

No further details regarding the aircraft, occupants, or damage have been provided in the source material.

Frequently asked questions

What happened in the 19 Jul 1995 Cessna TU206 accident near Danville, CA?

A pilot delayed by fog departed when conditions improved, but later struck a mountain ridge obscured by low stratus, coming to rest 20-30 feet below the top.

What aircraft was involved and where did it happen?

The accident on 19 Jul 1995 involved a Cessna TU206, registration N7091Q, operated by William R. Peterson, at Danville, CA.

What was the probable cause of the accident?

The pilot's intentional flight into known adverse weather and failure to maintain proper altitude.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001207X04005. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.