C-17 Globemaster: What does this sound mean?

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asdro
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C-17 Globemaster: What does this sound mean?

Post by asdro »

Hello,

I found on youtube an interesting video about flightdeck preparation of a C-17 Globemaster.


At 10:28 you can hear a loud sound in the flightdeck which sound like a jetengine is howling.

Does anybody know what this sound means and when it can be heard?

Sound is at 10:28

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TimC340
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Re: C-17 Globemaster: What does this sound mean?

Post by TimC340 »

Sounds to me like he’s doing a test of the fire detectors for the APU, then starting the APU.
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Firebird
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Re: C-17 Globemaster: What does this sound mean?

Post by Firebird »

My guess would be the APU.
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