APU Flashcards
1
Q
What controls the APU?
A
A dedicated FADEC
2
Q
How are the batteries used for the APU start?
A
BATT 2 powers the starter
BATT 1 powers the FADEC and EICAS for monitoring
3
Q
What is the fuel source for the APU?
A
Right fuel tank
Left fuel tank through the cross feed valve
4
Q
What fuel is used for APU start?
A
Batteries ON only. – DC fuel pump in right tank
AC powered airplane – ACMP 2
Right engine running – ejector fuel pump
5
Q
Describe the APU
A
Constant speed
Single-stage impeller with a 2-stage axial flow turbine
Independent oil system
