Fuel Flashcards
Where is fuel tank temperature taken?
Left tank
What type of fuel pumps are in each wing?
Primary ejector pump
ACMP
DCMP (right tank)
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?
Back up pump 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 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 the 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 shutoff valve (SOV)?
Pull the associated engine fire extinguishing handle
When will the FUEL 1(2) LO LEVEL EICAS message be presented?
660 lbs of fuel remaining in the associated tank
How many fuel tanks does the airplane have?
2 integral tanks
What is the priority of the AC fuel pumps?
AC Fuel Pumps supplies fuel to:
Onside engine during engine starts
Cross side engine during crossfeed operations
APU when engine is not running
-Backup pump, supplying fuel to the engine in the event of ejector pump failure
-Left AC electrical fuel pump
