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Old 07-16-2020, 02:28 PM   #20
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Join Date: May 2010
Location: Shenandoah Valley Virginia
Posts: 143
Default Re: Fan came apart!!

This is a text book metal fatigue failure........these fans go through millions of cycles in the 70+ years of operating........they are not precision balanced, nor precision machined and do not have an infinite life and will fail eventually.....the sharp edges, corners and bolt/rivet holes are primary suspects for starting cracks. Good reason to put fan examination on your routine maintenance plan.
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