Fuel Flashcards
How many fuel tanks does the airplane have?
2 integral tanks
Where is the fuel temperature taken?
Left tank (fuel synoptic page to read)
What types of fuel pumps are in each wing?
Primary Ejector Pump
ACMP
DCMP (Right tank only)
3 scavenge 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?
- Engine start
- Crossfeed operations (Low1 or Low2)
- Back-up pump in case of primary ejector pump failure
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?
Primary (main) ejector pump
What is the purpose of the collector bay/tank?
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 tanks once the wings are level.
Equalizes tank pressure with the atmosphere in flight and during refueling.
Can fuel be transferred from tank-to-tank or be dumped overboard?
No transferring or dumping.
However, you can open a crossfeed valve and supply fuel from both tanks to one engine.
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?
660lbs of fuel remaining in the associated collector tank.
Fuel Low Level caution (gauge indications turn yellow only) occurs at 1320 lbs. in associated tank.
