Single-engine accident involving engine shutdown during takeoff

4 fatalities • Sioux Falls, United States of America • Takeoff (climb)

An aircraft experienced an engine fire and subsequent loss of control shortly after takeoff, resulting in a crash near the airport.

What happened

During the takeoff phase, air traffic control notified the pilot of visible smoke trailing behind the aircraft type. Witnesses observed white smoke emanating from the left engine area, which was followed by the appearance of flames on the inboard side of the same engine. Following these observations, the aircraft entered a left turn. During this maneuver, the smoke and flames became obscured from view. As the aircraft transitioned to a southerly heading, the nose pitched down suddenly, leading to a descent and impact with the ground approximately 0.75 miles from the airport. Witnesses noted an increase in engine noise prior to the crash, and a fire occurred at the wreckage site.

Findings

Investigation of the wreckage revealed that the fuel selector and fuel valve for the left engine were set to the OFF position, indicating the pilot had intentionally shut down the engine. However, the propeller on the left engine had not been feathered. While the right engine showed damage consistent with producing power at the moment of impact, the left engine's oil cap was found unsecured, though fire damage prevented a definitive conclusion regarding its status prior to the crash. No mechanical failures or anomalies were found in either engine that would account for a loss of power. The investigation concluded that the pilot failed to follow established emergency procedures, which require the propeller to be feathered and the landing gear and flaps retracted when operating the aircraft on a single engine.

Probable cause

The pilot failed to adhere to the pilot's operating handbook procedures for single-engine flight by neglecting to feather the propeller after shutting down the left engine.

Frequently asked questions

What happened in the 2011-12-09 Cessna 421C Golden Eagle III accident near Sioux Falls, United States of America?

An aircraft experienced an engine fire and subsequent loss of control shortly after takeoff, resulting in a crash near the airport.

Were there any fatalities in the 2011-12-09 Cessna 421C Golden Eagle III accident?

The accident was fatal, resulting in 4 fatalities.

What aircraft was involved and where did it happen?

The accident on 2011-12-09 involved a Cessna 421C Golden Eagle III, registration N421SY, operated by Quest Aviation, at Sioux Falls, United States of America.

What was the probable cause of the accident?

The pilot failed to adhere to the pilot's operating handbook procedures for single-engine flight by neglecting to feather the propeller after shutting down the left engine.

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