Fuel Flashcards
With a loss of all generators and the C fuel pumps selected, will the engines flame out?
No. The A and B pumps continue to cycle to provide fuel pressure to the engine. This is not seen anywhere since the MFD is lost.
Reference: OM Vol. 2, Section 2-8, Fuel
What happens when the cross feed valve is placed to LOW 1?
The pump turns off in tank 1 and the cross feed valve opens.
Reference: OM Vol. I, Section 2-8, Fuel
Where is the cross feed valve placed when de-fueling?
Low 2.
Reference: OM Vol. 2, Section 2-8, Fuel
Is a takeoff allowed with the Fuel Imbalance EICAS message displayed?
As long as the imbalance is not exceeded (800 lbs.). The EICAS message remains illuminated until the imbalance is within 100 lb.
Reference: OM Vol. 2, Section 2-8, Fuel
How many fuel pumps are in each collector box?
3 electrical fuel booster pumps and 1 transfer ejector pump.
Reference: OM Vol. 2, Section 2-8, Fuel
What does the EICAS warning FUEL LOW LEVEL mean?
Less than approximately 30 minutes (463 lbs.)of fuel remains in the respective tank.
Reference: OM Vol. 2, Section 2-8, Fuel
What prevents pump cavitation during extended wing low maneuvers and un- coordinated flight?
A collector box keeps the fuel pumps submerged in fuel. Flapper valves prevent fuel from moving from the wing root to tip. An ejector pump also assists in supplying fuel to the collector box.
Reference: OM Vol. 2, Section 2-8, Fuel Tanks
When does ventral tank transfer occur on the EMB-145XR?
Automatic fuel transfer from the ventral tank to the main wing tanks occur when both wing tanks individually have a quantity less than 4630 lbs. for at least 30 seconds.
Reference: OM Vol. 2, Section 2-8, Ventral Tank Fuel Transfer System
Tank 1 has 3500 lbs. Tank 2 has 3700 lbs. How should the crossfeed switch be positioned to balance fuel?
The switch should be set to LOW 1.
Reference: OM Vol. 2, Section 2-8, Crossfeed Operation
Is it possible to transfer fuel from between the main wing tanks?
No, fuel cannot be transferred between the two wing tanks.
Reference: OM Vol. 2, Section 2-8, Crossfeed Operation
What fuel pumps are available when DC power is lost?
The A and B pumps in each wing tank are available.
Reference: OM Vol. 2, Section 2-5, DC Distribution Tables
What happens if the selected fuel pump fails?
If fuel pressure drops below 6.5 psi, the remaining wing pumps are automatically switched on and start cycling, until the pilot selects one of them.
Reference: OM Vol. 2, Section 2-8, Engine and APU Fuel Distribution and Control
Where is the MFD fuel temperature value measured?
The temperature is measured in the left wing tank.
Reference: OM Vol. 2, Section 2-8, Fuel Tanks
Is fuel crossfeed available without DC power?
Yes, the valve is essentially powered. Reference: OM Vol. 2, Section 2-5, DC Distribution Tables
