19. APU Panel

Question 1

What do you see when you press the APU Master Switch?

Answer 1

o Blue ON light in pb

o APU page appears and the when fully open, FLAP OPEN appears

Question 2

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

Answer 2

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

Question 3

With the APU running and supplying bleed air, how do you shut it down?

Answer 3

o APU BLEED pb OFF
o APU MASTER SW pb OFF
o APU will cool down (60‐120 seconds) and then shut down

Question 4

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

Answer 4

APU

Question 5

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

Answer 5

An APU auto shutdown has occurred.

Question 6

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

Answer 6

An APU bleed leak

Question 7

Can you use APU bleed air inflight?

Answer 7

o Yes

o Use of APU Bleed with Wing Anti‐Ice is prohibited.