Casualties unknown

Pilot Reports Wind Overturned Aircraft After Normal Touchdown (N66F)

Monticello, IA, US

On May 4, 1986, a Cessna 170B (registration N66F) operated by Richard A. Bonci was involved in an aviation accident near Monticello, IA. Investigators recorded the probable cause as: The pilot stated that following a normal touchdown, the wind picked up and overturned the aircraft. 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 reported that his recently purchased aircraft overturned after a normal touchdown when wind picked up. He stated he had tailwheel experience but could not provide substantiation.

Accident Details

The pilot stated that following a normal touchdown, the wind picked up and overturned the aircraft. He had recently purchased the aircraft and was ferrying it home when the accident occurred.

Pilot Background

The pilot further stated that he owned a tailwheel aircraft prior to purchasing this one, but he was unable to furnish a registration number. He also claimed to have considerable crosswind experience and training in tailwheel type aircraft, but could not substantiate this claim. There was no record of formal training and transition by a certified flight instructor.

Probable cause

The pilot stated that following a normal touchdown, the wind picked up and overturned the aircraft.

Frequently asked questions

What happened in the 4 May 1986 Cessna 170B accident near Monticello, IA?

A pilot reported that his recently purchased aircraft overturned after a normal touchdown when wind picked up. He stated he had tailwheel experience but could not provide substantiation.

What aircraft was involved and where did it happen?

The accident on 4 May 1986 involved a Cessna 170B, registration N66F, operated by Richard A. Bonci, at Monticello, IA.

What was the probable cause of the accident?

The pilot stated that following a normal touchdown, the wind picked up and overturned the aircraft.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001213X33652. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.