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Broken Crankshaft

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cashflyer

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I was wondering if anyone here had the experience and background to comment on possible causes of a crankshaft failure....

Lycoming HIO-360-C1A converted to AIO-360-A1A configuration
Approx 30 - 40 hours out of overhaul.
No aerobatic flying.

Crank PN 77850

The description that I have is that the "crank snapped at the forward face of the rear journal".

I don't have photos yet, or the SN of the crank.
The owner is planning to send the crank for x-ray.
He is also planning to turn it over to the FAA if they want to examine it.
 
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