OLA APU 2

Question 1

Up to what altitude can APU provide electrical power?

Answer 1

Entire flight envelope up to maximum certified altitude

On the ground up to 14500ft

Question 2

Up to what altitude is bleed air extraction from APU for 2 packs allowed?

Answer 2

15,000ft

Question 3

Up to what altitude is bleed air extraction from APU for one pack allowed?

Answer 3

22,500ft

Question 4

What are the start cycle limitations for the APU?

Answer 4

After 3 start cycles, a 60 minute cooling period is required

Question 5

Can you use APU bleed for WAI?

Answer 5

No

Question 6

Why might APU be slow to start if on batteries only, and you have just turned up to the aircraft?

Answer 6

Because APU start is inhibited for 45 seconds following the selection of the BAT to auto

Question 7

After APU start on batteries, how long does it take for the APU GEN to start, after APU AVAIL?

Answer 7

10 seconds

Question 8

When does the AVAIL light disappear when the APU is switched off?

Answer 8

Once N speed reduces below 95%

Question 9

How long does the APU continue to operate if switched off and bleed air had been supplied?

Answer 9

60 seconds

Question 10

What is important when switching off batteries after APU off?

Answer 10

FLAP OPEN light must be extinguished before turning off the batteries