APU

Question 1

Can the APU Bleed be used for anti-icing purposes?

Answer 1

No

Question 2

What is the start attempt limit on the APU?

Answer 2

After 3 consecutive start attempts, the crew must wait 60 min before a new start attempt

Question 3

What is the max altitude for APU assisted engine start?

Answer 3

20000ft

Question 4

Max altitude for APU bleed air in
-single pack operation?
-two pack operation?

Answer 4

Single pack - 22500ft
Two packs - 15000ft

Question 5

What is the APU battery start ceiling?

Answer 5

25000ft

Question 6

APU fuel burn
-on ground?
-in flight?

Answer 6

Ground - 120kg/h
Flight - 50kg/h