APU Panel Flashcards
1
Q
What does the illumination APU MASTER SW FAULT indicate?
A
Automatic APU shutdown has occurred.
2
Q
What is the significance of the APU AVAIL light illuminating?
A
APU is running above 99.5 % or 2 seconds after N speed reaching 95%. In practical terms it is ready to accept and support ELEC and/or AIR load.
3
Q
What condition in the APU system would cause an external horn to sound?
A
APU fire
4
Q
With the APU green AVAIL light ON and the EXT PWR green AVAIL light on, which system is powering the aircraft?
A
2 Avails = APU powering the aircraft.
5
Q
If possible, how would the APU be used if it has already started the cool- down cycle?
A
Pressing the APU MASTER SW pushbutton.
