49 - APU Flashcards
1
Q
How are the IGVs controlled?
A
Fuel muscle Px from the FCU.
They are modulated depending on bleed demand, on start and for ECS (Environmental control System.)
2
Q
Where is the APU oil sump?
A
Part of the accessory gearbox.
3
Q
How is APU starting inhibited by RAT extension?
A
The Battery Charge Limiters (BCL 1 and BCL 2), prevent operation
of the main start contactor 5 KA by removing the necessary ground signal, to operate the Main Start Contactor, from the MASTER SW.
4
Q
A
