APU Flashcards by Andrew Fitzhardinge | Brainscape

Q

When does the EICAS memo message APU RUNNING display?

A

When the APU selector is ON and,
APU N1 RPM exceeds 95% N1.

FCOM 2; 7.40.3

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Q

Is electrical power available from the APU in flight?

A

•No

FCOM 2; 7.30.1

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Q

Can the APU be operated in flight?

A

•Yes
NB: When left running for takeoff it can be operated in
flight up to 20,000 feet

FCOM 2; 7.30.1

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Q

How long should you wait before turning the battery switch OFF after the APU selector is rotated to OFF, and why?

A

•2 minutes
•Allows a complete shutdown sequence,
with fire detection capability.

FCOM 2; 7.30.2

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