Fuel Flashcards
Where is fuel tank temperature taken?
Left tank
What types of fuel pumps are in each wing?
Primary ejector pump
ACMP
DCMP (right tank)
3 scavenge ejector pump
What is the primary ejector pump?
Venturi pump with no moving parts and no electrical power used by the respective engine
Powered by motive flow
What is the purpose of the ACMP?
Back-up in case of primary ejector pump failure
Engine start
Crossfeed operations
What is the purpose of the DCMP?
Used for APU or engine start if AC power or the ACMP is not available
What is the purpose of the scavenge pumps?
Maintains fuel level in the collector box
What pump(s) is used once an engine is started?
Associated primary ejector pump
What is the purpose of the collector box?
Keeps the fuel pumps submerged
What is the surge/vent tank?
Collects fuel during wing-down maneuvers and returns it to the main tanks once the wings are level
Equalizes tank pressure with atmosphere in flight and during refueling
Can fuel be transferred from tank-to-tank or be dumped overboard?
No
What happens when the crossfeed switch is selected to LOW 1?
Crossfeed valve is opened
Commands the ACMP 2 to ON to provide fuel from the right tank to both engines
What is the only way to close the engine fuel SOV?
Pull the associated engine fire extinguishing handle
When will the FUEL 1(2) LO LEVEL EICAS be presented?
660 lbs of fuel remaining in the associated tank, or if one scavenger pump fails ~3970 lbs in the respective tank.
How many fuel tanks does the airplane have?
2 integral tanks
