APU Flashcards
1
Q
Why does the fault light come on when starting?
A
Monitors the APU fuel valve operation.
2
Q
What is the duty start cycle for APU
A
3 starts in 60 minute
3
Q
Which battery provides fire protection during start ?
A
Aircraft batt.
4
Q
What happens in the air and on ground if battery selected off.
A
In air Apu remains on
On ground Apu shuts down .
5
Q
What happens if APU fault light?
A
Apu will automatically shut down .
6
Q
What does the fault light indicate if Apu shut down ?
A
The Apu fuel valve is not in the commanded position
7
Q
Limitation of Apu bleed and electrical load ?
A
17000 feet for bleed air .
42000 feet for electrical.
8
Q
Why does the Apu not shut down on taxi.
A
Because the engine fuel controls witches are in the run position.
