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ERJ 170 Fuel syst.
Fueling system questions
Question | Answer |
---|---|
How many fuel tanks does the airplane have? | • 2 integral tanks |
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 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(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• 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 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 |