Fuel System Flashcards Preview

CRJ-900 Limitations > Fuel System > Flashcards

Flashcards in Fuel System Deck (22):
1

What are the fuel quantities for Gravity refueling

Total: 14,810 lbs CRJ-700 Total: 14,580 lbs
Mains: 7,405 lbs Mains: 7,290 lbs
Center: N/A

2

How is the fuel moved from the center tank to the mains

Transfer ejectors

3

How is the fuel moved from the main tanks to the collector tanks

Scavenge ejectors (gravity line used as a backup)

4

How is the fuel moved from the collector tanks to the engine driven high pressure fuel pump

Main ejectors (backed up by boost pumps)

5

What is the function of the electric boost pumps

To provide initial fuel for engine start and to back up the main ejectors

6

What is the flight deck indication of high pressure fuel pump failure

Engine flameout

7

What is the maximum fuel imbalance

300 lbs for takeoff, 800 lbs for all other phases

8

When will the fuel system automatically begin transferring fuel

200 lb fuel imbalance

9

When are the boost pumps automatically energized

Low pressure from the main ejectors (if the pumps are armed)

10

Where is the high pressure fuel pump located

N2 accessory gearbox

11

Where is bulk fuel temperature taken

Right main tank

12

What is the minimum engine bulk fuel temp for takeoff jet-A

-30c

13

What is the minimum bulk fuel temp during flight jet -A

Above -40c

14

How is engine fuel heated

Fuel/oil heat exchanger

15

What is the minimum engine fuel temperature for takeoff

+5c

16

What is the takeoff limitation if the center tank has > 500 lbs of fuel

Each main tank must have > 4400 lbs

17

Which bus powers the refuel/defuel panel and refuel/defuel SOVs

APU battery direct bus

18

Where is the refuel/defuel panel located

The fuselage forward of right wing

19

Where is the single point adapter located

Right wing root

20

What are the fuel quantities for pressure refueling

Total: 19,594 lbs
Mains: 7,492 lbs
Center: 4,610 lbs

21

Over pressure relieve valve opens at what pressure?

Over 5 PSI

22

How many fuel probes are their to detect fuel level?

17 total
6 in each main tank
3 in the center tank
1 in each collector tank