PPRuNe Forums - View Single Post - A319 weird high pitch whine...

14th May 2013, 04:45

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nitpicker330

Join Date: Jun 2009

Location: Australia

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The A330 with the APU running can offload excess bleed air, it makes a screaming whining noise when it does and it goes up and down in volume. It's worse with the APU bleed selected off ( naturally )

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