Casualties unknown

Loss of directional control during landing attempt (N4596D)

Teedsburg, WI, US

On February 10, 1991, a Beech G35 (registration N4596D) operated by Robert Knutson Jr. was involved in an aviation accident near Teedsburg, WI. Investigators recorded the probable cause as: The pilot's failure to maintain directional control during the landing and subsequent go-around maneuver. 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 2026-06-10Data APIEditorial standards

The pilot lost directional control while attempting to land, resulting in a runway excursion. Post-accident inspection found no mechanical issues with the airframe or powerplant.

What happened

The pilot reported experiencing difficulties maintaining directional control of the aircraft during the landing phase. In an effort to recover from the unstable approach, he initiated a go-around maneuver. However, directional control was not regained during this critical phase of flight.

As the aircraft attempted to climb away from the runway surface, it veered off the right side of the pavement. The accident sequence concluded when the aircraft came to rest in a position 180 degrees rotated from its original heading upon impact with the ground.

The investigation

A post-accident examination of the wreckage was conducted to determine if mechanical failure contributed to the loss of control. Inspections of the airframe and powerplant revealed no abnormalities or pre-existing mechanical defects that would have impaired the aircraft's handling characteristics.

Probable cause

The pilot's failure to maintain directional control during the landing and subsequent go-around maneuver.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X16426. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.