Fuel Flashcards
What are the fuel quantities for gravity refueling ?
Total 14,810
Mains 7,405
How is the fuel moved from the center tank to the main tanks?
Transfer ejectors
How is the fuel moved from the main tanks to the collector tanks?
Scavenge ejectors
How is fuel moved from the collector tanks to the engine driven high pressure fuel pump?
Main ejectors (backed up by boost pumps)
What are the fuel quantities for pressure refueling?
Total 19594
Mains 7492
Center 4610
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 a high pressure fuel pump failure?
Engine flameout
What is the maximum fuel imbalance?
300 for takeoff
800 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 the bulk fuel temperature taken?
Right main tank
What is minimum bulk fuel temp for take-off (jet-A)?
-30° C
What is the minimum bulk fuel temp during flight (jet A)
Above -40°C
How is engine fuel heated?
Fuel/oil heat exchanger
What is the minimum engine fuel temperature for takeoff?
+ 5° C
What is the limitation if the center tank has > 500 lbs of fuel?
Each main tank must have at least 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 the right wing
Where is the single point adapter located ?
Right wing root
What happens before first flight of the day if airplane was cold soaked at -30°C (22°F) or below for more than 8 hours?
The engines must be motored for 60 seconds and FAN rotation must be verified before an engine start is initiated.
Thrust reversers must be actuated until the deploy and stow cycles are less than 2 seconds.
