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Old 7th Nov 2013, 21:26
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Aesir
 
Join Date: Mar 2002
Location: Iceland
Age: 58
Posts: 814
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I like that you call it an Allison and not RR

I read somewhere (500guy): "Rolls Royce claims allison 250 series engines have a 1:10,000,000 flight hour Design/Manufactured parts (properly installed) failure rate".

http://www.pprune.org/rotorheads/479...ure-rates.html
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