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Thread: Sawing up an A319 just after it's parked?
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Old 29th May 2006 | 13:16
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palmdeira
 
Joined: Feb 2006
Posts: 36
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From: here, there, everywhere, mostly sandy
it's the hydraulic power transfer unit - PTU. Shouldn't really be operating unless the yellow system electric pump has been turned on, perhaps due to single engine taxiing.
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