1 fatality

Private Pilot Loses Control in Icing Conditions After Vacuum Pump Failure (N7586N)

Salem, MO, US

On January 31, 1999, a Cessna U-206G (registration N7586N) operated by Eft Aviation Services, Inc. was involved in an aviation accident near Salem, MO. One person was killed. Investigators recorded the probable cause as: the spatial disorientation and loss of control by the pilot after a reported vacuum failure. Factors were instrument flight conditions and icing 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 2026-07-04Data APIEditorial standards

An instrument-rated private pilot reported vacuum pump failure and ice accumulation before losing control during a turn in instrument meteorological conditions. The aircraft was destroyed upon impact with terrain.

Accident Overview

An aircraft operated by a private pilot, who held an instrument rating, was destroyed following an in-flight loss of control and subsequent collision with terrain. The accident occurred during cruise flight.

Sequence of Events

While cruising, the pilot experienced a vacuum pump failure and reported difficulty managing the aircraft. During a turn, the pilot stated that he became completely disoriented. The aircraft subsequently lost control and struck the ground.

Pilot Report

The pilot communicated that he had lost the vacuum pump and was encountering some difficulty. He further reported that he was picking up ice and had requested a lower altitude to mitigate the icing conditions.

Weather Conditions

Instrument meteorological conditions (IMC) prevailed at the time of the accident. The presence of icing was explicitly noted in the pilot's reports.

Frequently asked questions

What happened in the 31 Jan 1999 Cessna U-206G accident near Salem, MO?

An instrument-rated private pilot reported vacuum pump failure and ice accumulation before losing control during a turn in instrument meteorological conditions. The aircraft was destroyed upon impact with terrain.

Were there any fatalities in the 31 Jan 1999 Cessna U-206G accident?

The accident was fatal, resulting in 1 fatality.

What aircraft was involved and where did it happen?

The accident on 31 Jan 1999 involved a Cessna U-206G, registration N7586N, operated by Eft Aviation Services, Inc., at Salem, MO.

What was the probable cause of the accident?

the spatial disorientation and loss of control by the pilot after a reported vacuum failure. Factors were instrument flight conditions and icing conditions.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001204X00018. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.