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Composite helicopters Accident

Sterling Archer · 2015-01-06 19:08:14

Composite helicopters released footage of the crash of there test aircraft ZK-HOL and the following investigations findings. The investigation into the incident conducted by Composite Helicopters International, Metlab, and the University of Auckland found that the failed component — a standard M81935-1-5 scissor link rod…

06-01-2015 7:08pm

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Sterling Archer

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Composite helicopters released footage of the crash of there test aircraft ZK-HOL and the following investigations findings.

The investigation into the incident conducted by Composite Helicopters International, Metlab, and the University of Auckland found that the failed component — a standard M81935-1-5 scissor link rod end — suffered a crack across the thread between the lock nut and the ball end. The cause of the failure was determined to be high cycle fatigue. However, a design review found it unlikely that the part was subjected to operational loads that exceeded its design endurance limit, suggesting the possibility of a manufacturing defect.

A rather scary moment for the crew

http://www.verticalmag.com/news/article/CompositeHelicoptersreleasesaccidentvideoinvestigationfindin

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