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#20
April 3rd 13, 09:22 PM
posted to rec.aviation.soaring
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Tragic Double Fatality?
On Apr 3, 1:09*pm, wrote:
The wing failure happened where the lower spar boom suffered first compression damage, then failed in tension, initiating the failure of the upper spar boom by bending... This is a very common failure mode for wooden aircraft structures. Often the event that caused the original compression damage precedes the final failure by weeks or months or even years. Thanks, Bob K. 
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