NTSB Identification: CHI06CA039.
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Accident occurred Wednesday, November 30, 2005 in Brainerd, MN
Probable Cause Approval Date: 02/28/2006
Aircraft: Larson Aero Comp-6, registration: N4334Z
Injuries: 1 Serious.

NTSB investigators used data provided by various entities, including, but not limited to, the Federal Aviation Administration and/or the operator and did not travel in support of this investigation to prepare this aircraft accident report.

The airplane collided with the terrain following a loss of control on takeoff. The pilot, who was also the airplane builder, reported that the takeoff was normal and at an altitude of about 20 feet above the runway, the left wing dropped slightly. He stated he attempted to compensate by using opposite aileron, however, the wing continued to drop until the airplane contacted the ground. The pilot stated the accident occurred during the first flight after he converted the aileron system from push-pull cables to a tube and bell crank system. The pilot reported he inadvertently reversed the left and right aileron control systems when he installed the conversion.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

The pilot/builder inadvertently reversed the aileron control systems during installation and failed to maintain control of the airplane during takeoff. A factor associated with the accident was the pilot/builder’s failure to perform an adequate aircraft preflight.

Full narrative available

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