700/900 APU Flashcards Preview

SkyWest CRJ Upgrade 2019 > 700/900 APU > Flashcards

Flashcards in 700/900 APU Deck (13):
1

What type of compartment is the 7/9 APU in?

Fireproof, containment compartment

2

Is there a fire warning on ground?

No

3

Where is the APU intake located?

on the right side of the tail

4

How is the APU door commanded OPEN on the GRND? Does it open fully?

PWR fuel switch
Yes, full open on GRND

5

How is the APU door commanded OPEN in Flight? Does the door open fully?

STRT/STOP Switch
No, >50% open

6

What is the APU door intake air used for?

APU ventilation and oil cooler

7

What speed is max if the APU door position is unknown?

220 KIAS

8

Where does the APU get its fuel from in the 7/9?

Left collector tank

9

What pump sends fuel to the APU?

dedicated DC electric APU pump

10

What happens if the dedicated pump fail?

internal bypass valve pulls fuel from an APU high pressure pump

11

APU door open Max KIAS?

220 KIAS

12

How many start attempts are allowed in 1 hour? What is the limit between starts?

3 attempts per hours
2 min crank delay

13

What RPM does the APU starter cutout?

46-60% depending on altitude