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767-200 dead APU Battery

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767-200 dead APU Battery

Old 17th May 2015, 08:38
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Location: Chicago, IL, USA
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767-200 dead APU Battery

Hoping my question doesn't reveal any remedial systems knowledge, but I'm curious after recently reporting to a/c with dead APU battery.

Why isn't the system designed to be able to start the APU on ground power?

I have a hunch, but I'd like to hear your ideas.

We accomplished engine start with external air and departed with APU deferred.

Thanks.
zerozero is offline  
Old 17th May 2015, 09:23
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Get into your manuals, and look at what feed directly of (hot bus) the main and APU battery, therein lies the answer.
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Old 17th May 2015, 09:49
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Right, fire detection and protection.
That was my hunch. Just needed a little confirmation. Thanks.
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