Uncontrolled aircraft ascent and crash following engine restart

Casualties unknown • Turlock, CA, US

An aircraft became airborne after an improper hand-prop restart attempt, resulting in a descent into a nearby cornfield.

What happened

Prior to starting the engine, the pilot turned off the fuel selector and failed to return it to the on position during taxi for takeoff. This resulted in a total loss of engine power. Because the aircraft was not equipped with a starter, the pilot attempted to restart the engine using the hand-prop method.

During this process, the aircraft was not securely tied down and the throttle was not set to idle. Upon successful ignition, the engine revved up unexpectedly. The pilot attempted to restrain the moving aircraft by holding onto it, which resulted in one injury to the pilot. Following the restart, the unoccupied aircraft became airborne and climbed to approximately 200 feet above the ground. The aircraft then entered a right bank and descended into a cornfield adjacent to the airport.

Findings

  • The fuel selector was left in the off position during taxi.
  • The aircraft was not properly secured to the ground during the hand-prop procedure.
  • The throttle was not set to idle during the engine restart attempt.

Probable cause

The engine power surge during a hand-prop restart, combined with the failure to secure the aircraft and set the throttle to idle, caused the uncontrolled ascent and subsequent crash.

Frequently asked questions

What happened in the 2007-09-29 Piper J5A accident near Turlock, CA?

An aircraft became airborne after an improper hand-prop restart attempt, resulting in a descent into a nearby cornfield.

What aircraft was involved and where did it happen?

The accident on 2007-09-29 involved a Piper J5A, registration N38234, operated by Art L. Delano, at Turlock, CA.

What was the probable cause of the accident?

The engine power surge during a hand-prop restart, combined with the failure to secure the aircraft and set the throttle to idle, caused the uncontrolled ascent and subsequent crash.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20071026X01670. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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