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Old 9th Oct 2007, 13:08
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Dr Mark Cowley
 
Join Date: Sep 2004
Location: In the saddle
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Uncontrolled R44 engine RPM

I have had the same thing happen over the years. It was found to be a hairline crack somewhere in the magnetos, that opened up when it got warm after a few minutes running. It sent the engine rpm haywire
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