Flashcards in 700/900 APU Deck (13):
What type of compartment is the 7/9 APU in?
Fireproof, containment compartment
Is there a fire warning on ground?
Where is the APU intake located?
on the right side of the tail
How is the APU door commanded OPEN on the GRND? Does it open fully?
PWR fuel switch
Yes, full open on GRND
How is the APU door commanded OPEN in Flight? Does the door open fully?
No, >50% open
What is the APU door intake air used for?
APU ventilation and oil cooler
What speed is max if the APU door position is unknown?
Where does the APU get its fuel from in the 7/9?
Left collector tank
What pump sends fuel to the APU?
dedicated DC electric APU pump
What happens if the dedicated pump fail?
internal bypass valve pulls fuel from an APU high pressure pump
APU door open Max KIAS?
How many start attempts are allowed in 1 hour? What is the limit between starts?
3 attempts per hours
2 min crank delay