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Old 5th Sep 2012, 22:41
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Landroger
 
Join Date: Feb 2009
Location: Jungles of SW London
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dean4689
Bleed air valves.
And? You can't just leave it there Dean. I can guess what bleed valves are, but what, where and roughly when? And, given how much - relative - noise the engines are making, would it be possible to hear one or more opening/closing/oscillating?
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