NTSB Identification: SEA06CA095.
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division
Accident occurred Monday, May 15, 2006 in Big Timber, MT
Probable Cause Approval Date: 08/29/2006
Aircraft: Helmer Avid Magnum, registration: N124WT
Injuries: 1 Uninjured.

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.


At the beginning of his takeoff roll, the aircraft door popped open, so the pilot shut it. Then a few moments later, the door popped open again, and the pilot closed it a second time. While he was closing the door for the second time, the aircraft veered off the left side of the runway. At that point, the pilot saw that the aircraft was heading for a gate post and a fence, so he pulled the stick back in hopes of clearing the obstacles. But, the aircraft's left wing impacted the post, and the aircraft spun around about 200 degrees, and came to rest with its right wing entangled in the fence structure. After the accident, the pilot stated that his attempt to close the door had distracted him, and that he should have put 100 percent of his attention on the takeoff, and taken care of the door after he was airborne.

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

The pilot's failure to maintain directional control after he diverted his attention to close the aircraft's door during the takeoff roll. Factors include a fence and fence post along the side of the runway.

Full narrative available

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