APU

Question 1

First flight of the day. Before APU start, what must be done?

Answer 1

Fire detection test

Question 2

What is the minimum battery voltage to start the APU? Where would you verify that?

Answer 2

22 V on the DC electric synoptic page

Question 3

What is the APU start limitation?

Answer 3

22V
FL370
3starts/hr. 2 minute wait

Question 4

What does the illumination of the PUMP FAIL on the PWR FUEL switchlight indicate?

Answer 4

APU fuel pump FAIL

Question 5

What does the illumination of the PUMP FAIL on the PWR FUEL switch light indicate?

Answer 5

SOVE not in commanded position

Question 6

What are the APU priorities?

Answer 6

1 electrical,

2 pneumatics

Question 7

What is the top altitude we can use the APU for electrical loading?

Answer 7

FL410

Question 8

What is the top altitude we can start the APU?

Answer 8

FL 370

Question 9

What is the top altitude for bleed air extraction?

Answer 9

FL 250

Question 10

Where is the APU fuel supply from?

Answer 10

Left collector tank

Question 11

If the APU fuel pump fails, will it shut down?

Answer 11

No, but no restart

Question 12

For an unattended APU fire on the ground, what will happen?

In flight?

Answer 12

Shut down and extinguish automatically on the ground.

IShut down automatically in-flight, but manually extinguish.