No fatalities

26 Oct 2013: PIPER PA 18-150 A150 — Twin Falls, ID

Twin Falls, ID, United States

On 26 Oct 2013, a PIPER PA 18-150 A150 was involved in an aviation accident near Twin Falls, ID. No fatalities were reported. Investigators recorded the probable cause as: The pilot inadvertently moved the mixture control with his left knee during the takeoff roll, causing the engine to lose power, leading to an aborted takeoff and nose-over. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

The pilot of a tailwheel airplane inadvertently moved the mixture control with his knee during takeoff, causing engine power loss. He aborted the takeoff, but the airplane nosed over, resulting in substantial damage to the wings and fuselage.

Accident Summary

A tailwheel-equipped airplane experienced a nose-over during an aborted takeoff from a ploughed field, resulting in substantial damage to the wings and fuselage. The pilot reported no preimpact mechanical malfunctions or failures that would have precluded normal operation.

Flight Details

The pilot had just completed an uneventful local flight, taking off and landing in a ploughed field adjacent to the home of a friend. A short time later, he prepared for the return flight to his home base. Prior to departure, he moved his seat forward to accommodate a passenger behind.

Takeoff and Accident

During the takeoff roll, the pilot inadvertently moved the mixture control with his left knee. The engine began to lose power, prompting the pilot to abort the takeoff. As he applied brake pressure, the airplane nosed over.

Aircraft Configuration

The airplane had recently been rebuilt, with the mixture control positioned in the lower left corner of the instrument panel, just above the pilot's left knee.

Probable cause

The pilot inadvertently moved the mixture control with his left knee during the takeoff roll, causing the engine to lose power, leading to an aborted takeoff and nose-over.

Contributing factors

Causes

Directional control — Not attained/maintainedPilot

Other contributing factors

Unintentional use/operation