NTSB Identification: CHI06LA273.
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Accident occurred Thursday, September 28, 2006 in McCook, NE
Probable Cause Approval Date: 04/25/2007
Aircraft: Daub Pawnee Chief, registration: N565CH
Injuries: 2 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The amateur built helicopter impacted the ground during a test flight following the failure of a welded joint at a cyclic control cable bracket resulting in a loss of control authority. A post impact fire ensued destroying the helicopter. The pilot reported he was in a low hover when the tail came up and the helicopter tilted. One of the skids subsequently caught the ground causing the helicopter to roll over. Examination of the helicopter revealed that a welded joint failed at a cyclic control cable bracket on the main rotor mast. Failure of the welded bracket caused the loss of input control authority from the cyclic control to the main rotor.

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

The failure of a welded joint at a cyclic control cable bracket located on the main rotor mast which made control of the helicopter impossible for the pilot.

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