Fuel Flashcards
How many tanks does the airplane have?
2 integral tanks
Where is the fuel tank temp taken?
Left tank
What types of fuel pumps are in each tank?
- primary ejector pump
- ACMP
- DCMP (right tank)
- 3 scavenger ejector pumps
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 pump in case of primary ejector pump failure
- engine start
- crossfeed ops
What is the purpose of the DCMP?
Used to start the 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 is used once an engine is started?
Associated primary ejector pump
What is the purpose of the collector box?
- keeps the fuel pumps submerged
- ensures constant fuel flow to the respective engine
What is the surge/vent tank?
- collects fuel during wing down maneuvers and returns it to the main tank once the wings are level
- equalizes tank pressure with atmosphere inflight and during refueling
Can fuel be transferred from tank to tank or 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 extinguisher handle
When will the FUEL 1(2) LO LEVEL EICAS message be displayed?
660 lbs of fuel remaining in the associated tank
When will the crew declare min fuel?
In the pilot’s judgment further delay will cause the flight to land with less than the greater of reserve fuel plus alternate fuel(when required) or 2660 lbs
