Fuel System Flashcards
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
How is the fuel moved from the center tank to the mains
Transfer ejectors
How is the fuel moved from the main tanks to the collector tanks
Scavenge ejectors (gravity line used as a backup)
How is the fuel moved from the collector tanks to the engine driven high pressure fuel pump
Main ejectors (backed up by boost pumps)
What is the function of the electric boost pumps
To provide initial fuel for engine start and to back up the main ejectors
What is the flight deck indication of high pressure fuel pump failure
Engine flameout
What is the maximum fuel imbalance
300 lbs for takeoff, 800 lbs for all other phases
When will the fuel system automatically begin transferring fuel
200 lb fuel imbalance
When are the boost pumps automatically energized
Low pressure from the main ejectors (if the pumps are armed)
Where is the high pressure fuel pump located
N2 accessory gearbox
Where is bulk fuel temperature taken
Right main tank
What is the minimum engine bulk fuel temp for takeoff jet-A
-30c
What is the minimum bulk fuel temp during flight jet -A
Above -40c
How is engine fuel heated
Fuel/oil heat exchanger
What is the minimum engine fuel temperature for takeoff
+5c
What is the takeoff limitation if the center tank has > 500 lbs of fuel
Each main tank must have > 4400 lbs
Which bus powers the refuel/defuel panel and refuel/defuel SOVs
APU battery direct bus
Where is the refuel/defuel panel located
The fuselage forward of right wing
Where is the single point adapter located
Right wing root
What are the fuel quantities for pressure refueling
Total: 19,594 lbs
Mains: 7,492 lbs
Center: 4,610 lbs
Over pressure relieve valve opens at what pressure?
Over 5 PSI
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
