*APU-APU Panel

Question 1

What is the difference between the blue ON light in the start switch and the green AVAIL light?

Answer 1

The blue ON light appears during the start sequence, the green AVAIL light means APU is on speed and start is completed, APU is available for electric’s and air.

Question 2

*With the APU green AVAIL light ON and the EXT PWR green AVAIL light ON, which system is powering the aircraft?

Answer 2

APU

Question 3

*An amber FAULT light in the APU MASTER SW pb indicates?

Answer 3

An APU auto-shutdown has occurred commanded by the Electronic Control Box (ECB)

Question 4

*What does an amber FAULT light in the APU BLEED pb mean?

Answer 4

An APU bleed leak.

Question 5

Can you use APU bleed air in flight?

Answer 5

-Yes.
-Use of APU bleed with Wing Anti-Ice is prohibited.

Question 6

*What does the green AVAIL light on the APU START pb indicate?

Answer 6

APU N is above 99.5% or 2 secs after N reaches 95%