Casualties unknown

1985-09-22: Univair 108-1 (N8403K) — Michael Hanson — Mcgregor, MN

Mcgregor, MN, US

On September 22, 1985, an Univair 108-1 (registration N8403K) operated by Michael Hanson was involved in an aviation accident near Mcgregor, MN. Investigators recorded the probable cause as: The pilot's failure to select a fuel tank with sufficient fuel, which resulted in fuel exhaustion and loss of engine power during takeoff. 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 1781061362Data APIEditorial standards

An aircraft contacted trees during a forced landing after losing power on takeoff. Investigation showed the fuel selector was set to an empty left tank, causing fuel exhaustion.

What happened

The aircraft experienced a loss of power shortly after initiating takeoff from runway 18. The pilot attempted a forced landing but was unable to clear the departure end of the runway. During this maneuver, the aircraft struck trees located just beyond the runway threshold.

The investigation

A post-accident examination of the aircraft revealed significant discrepancies in the fuel system configuration. The fuel selector valve was found positioned to draw from the left tank. However, inspection confirmed that the left tank contained no fuel at the time of the incident.

Further checks indicated that the carburetor was dry and devoid of fuel. Additionally, the fuel lines connected to the left tank were also empty, confirming that no fuel had reached the engine during the critical phase of flight.

Findings

The primary factor leading to the accident was the pilot's failure to ensure adequate fuel supply for takeoff. By selecting the left tank which was empty, the engine received no fuel. This resulted in a complete loss of power shortly after departure, leaving insufficient altitude or distance to execute a safe landing away from obstacles.

Safety message

Pilots must verify fuel quantity and selector position before every flight. Relying on assumptions about tank levels can lead to catastrophic fuel exhaustion during critical phases of flight such as takeoff.

Probable cause

The pilot's failure to select a fuel tank with sufficient fuel, which resulted in fuel exhaustion and loss of engine power during takeoff.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X37734. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.