APU

Question 0

When would the corresponding APU N% Speed be displayed in amber or red?

Answer 0

When an overspeed occurs

Question 1

How can you tell the APU is up to speed and the generator is available?

Answer 1

APU electrical power is available

Question 2

What is indicated when the APU EGT indication is displayed in amber or red?

Answer 2

An over temperature condition

Question 3

The APU START pb is pressed and illuminates blue. What does this mean?

Answer 3

The APU starter is energized

Question 4

With external power supplying the buses and the APU operating, what action is required to select APU power?

Answer 4

Deselect external power by pushing the EXT PWR pb

Question 5

When would the APU fault light illuminate?

Answer 5

APU automatic shutdown

Question 6

What are some of the possible reasons for an APU auto shutdown?

Answer 6

Hi oil temp, low oil pressure, overspeed etc.

Question 7

Is altitude a consideration when considering the use of the APU as a source of external air and/or electrical power?

Answer 7

Yes