Casualties unknown

1998-10-18: Mooney M20A (N6534B) — Oklahoma City, OK

Oklahoma City, OK, US

On October 18, 1998, a Mooney M20A (registration N6534B) was involved in an aviation accident near Oklahoma City, OK. Investigators recorded the probable cause as: The loss of engine power due to fuel starvation as result of the pilot's improper placement of the fuel tank selector switch. A factor was the lack of suitable terrain for the pilot to execute the forced landing. 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

A 1959 vintage airplane experienced engine power loss shortly after takeoff from runway 35 at 400-500 feet AGL. The pilot landed in an open pasture, colliding with a terrace and collapsing the landing gear. Post-accident investigation revealed fuel mismanagement.

Accident Overview

The engine lost power soon after the airplane departed from runway 35 while at an altitude of 400 to 500 feet above ground level (AGL). The pilot executed a forced landing in an open pasture with the landing gear extended. During the landing roll, the airplane collided with a terrace, causing the landing gear to collapse.

Pilot Actions and Fuel Management

During the preflight inspection, the pilot noted that the left main fuel cell was approximately 3/4 full, while the right fuel tank was very low on fuel. Prior to takeoff, the pilot inadvertently switched the fuel selector to the right fuel tank. When the engine lost power, the pilot assumed the engine had malfunctioned and did not switch the fuel selector to the fullest tank (the left main fuel cell). The pilot, who had accumulated 400 hours of flight time, reported to local law enforcement personnel that 'the airplane ran out of fuel.' However, examination after the accident found the left main fuel cell still approximately 3/4 full.

Aircraft Details

The accident airplane was a 1959 vintage model equipped with a single fuel gauge controlled by a two-position toggle switch for both the left and right fuel cells. The aircraft's configuration may have contributed to the difficulty in monitoring fuel quantity in each tank.

Investigation Findings

The source of the engine power loss was traced to fuel starvation from the right fuel tank, which had very low fuel. The left main fuel cell contained sufficient fuel but was not selected. No mechanical malfunction was reported.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X11260. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.