How is the fuel moved from the center tank to the wing tanks?
Transfer ejectors
How is the fuel moved from the wing tanks to the collector tanks?
Scavenge ejectors and gravity
How is the fuel moved from the collector tanks to the engine driven high pressure fuel pumps?
Main ejectors (backed up by DC electric boost pumps)
What is the function of the electric boost pumps?
To supply fuel to the engine when main ejector pressure is low
Will an engine continue to run with a failed engine driven fuel pump?
No
Max fuel imbalance
300 lbs for take off
800 lbs for all other phases
How many ways are available to cross flow fuel?
- Auto, manual, and gravity
When will the auto cross flow system begin transferring fuel?
200 lb fuel imbalance
When will the auto cross flow system stop transferring fuel?
When the fuel quantity of the low tank exceeds the other tank by 50 lbs
When are the boost pumps automatically energized?
Low pressure detected at the main ejectors (if the boost pumps are armed)
Where is bulk fuel temperature measured?
Right main tank
What is the minimum bulk fuel temp for takeoff (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 takeoff limitation if the center tank has over 500 lbs of fuel?
Each wing tank must be above 4,400 lbs
Which bus powers the refuel/defuel panel and refuel/defuel SOVs?
APU battery direct bus
Where is the refuel/defuel panel located?
On the fuselage, forward of the right wing
Where is the single point adapter located?
Right wing root
What message will be displayed on EICAS whenever the refuel/defuel panel is switched on?
AUTO XFLOW INHIBIT status message
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Boxed Memory Items98
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Speed Limitations17
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EMERGENCY EQUIPMENT18
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COMMUNICATIONS5
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AVIONICS AND FLIGHT INSTRUMENTS21
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AUTOMATIC FLIGHT CONTROLS SYSTEMS17
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AUXILIARY POWER UNIT13
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FUEL SYSTEM20
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AIR CONDITIONING/PRESSURIZATION18
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ICE AND RAIN PROTECTION10
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FIRE PROTECTION18
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ELECTRICAL25
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HYDRAULIC SYSTEMS15
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FLIGHT CONTROLS26
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LANDING GEAR, BRAKES, NOSE WHEEL STEERING15
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DIMENSIONS6
