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Old 16th June 2009 | 16:45
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handbag
 
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From: earth
Allison 250 stuck fuel drain valve
Scenario. The Allison 250 fuel drain valve malfunctions and gets stuck in the closed postion and a significant amount of unburned fuel becomes trapped in the combustion chamber. At what N1 speed before normal light off will compression be sufficient to ignite the gas prematurely?

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