Apu

Question 1

Apu max alt for bleed air

Answer 1

17,000 feet

Question 2

When will the apu automatically shut down

Answer 2

High oil temp
Low oil pressure
Clogged oil filter

Question 3

Apu battery supply’s power to

Answer 3

Starter
Inlet door
Control circuitry

Question 4

Aircraft battery supplies power to what apu functions

Answer 4

Fire protection
Apu fuel valve
Dc fuel pump

Question 5

Apu start sequence when selected to start

Answer 5

Apu fuel valve opens
Air inlet door opens
Fuel pump energized in left forward main tank
Starter energizes after door fully open
Apu accelerates to normal operating range

Question 6

Apu starter limit

Answer 6

Max 3 start or attempts in 60 min period

Question 7

If no AC power for left main fuel pump, which pump supplies fuel

Answer 7

Dedicated DC pump in left main tank

Question 8

What dose the fault light next to apu switch indicate

Answer 8

Fuel valve not in commanded position

Question 9

APU max alt for electrical use

Answer 9

Aircraft full operating envelope