Loss of Control During Takeoff Following Aircraft Rebuild

Casualties unknown • Anchorage, AK, US

A pilot experienced an uncommanded roll during the initial climb phase after performing a preflight inspection on a recently rebuilt aircraft.

What happened

Following a rebuild of the unspecified aircraft, the pilot and a mechanic performed a preflight inspection, which included checking the flight controls. Both individuals were satisfied with the apparent airworthiness of the airplane. During the takeoff and initial climb, while at approximately 150 feet above ground level and traveling at 70 mph, the airplane suddenly rolled approximately 90 degrees to the right.

The pilot attempted to correct the roll by applying left aileron and left rudder control, but the aircraft failed to respond to these inputs. In an attempt to maintain airspeed, the pilot retarded the engine power to idle and pushed the control yoke forward. The right wing subsequently struck the runway. The pilot then applied full engine power, at which point the left wing struck the ground. The aircraft landed heavily on the main landing gear and departed the runway area, eventually colliding with a ditch. There were no fatalities reported.

The investigation

A post-accident examination of the aircraft and its flight controls was conducted. Investigators discovered that the chain control linkage located within the control yoke was misrouted at the base of the control column. This specific routing error resulted in the reversal of aileron activation.

Probable cause

The reversal of aileron control due to a misrouted chain control linkage within the control yoke during the aircraft rebuild process.

Frequently asked questions

What happened in the 2007-04-18 DE Havilland DHC-2 accident near Anchorage, AK?

A pilot experienced an uncommanded roll during the initial climb phase after performing a preflight inspection on a recently rebuilt aircraft.

What aircraft was involved and where did it happen?

The accident on 2007-04-18 involved a DE Havilland DHC-2, registration N93V, operated by Jonathan L. Miller, at Anchorage, AK.

What was the probable cause of the accident?

The reversal of aileron control due to a misrouted chain control linkage within the control yoke during the aircraft rebuild process.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20070510X00547. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.

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