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25 Cards in this Set
- Front
- Back
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What is the individual tank and total capacity in the LR? |
5,717 lbs per wing
11,434 lbs total |
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When is the FUEL 1 (2) LO LEVEL warning annunciated? |
Between 463 and 584 lbs
(Less than 30 mins of fuel) |
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What is the purpose of the collector box? |
To keep fuel pumps submerged at all times. (This prevents cavitation and ensure that the pumps remain properly cooled.) |
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What two devices ensure enough fuel in the collector box in all conditions? |
Flapper valves and an ejector pump |
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How does the ejector pump operate? |
The ejector pump uses pressurized return fuel from the engine to draw new fuel from the fuel tank through a venturi and into the collector box.
(The circulation resulting from the ejector pump is called motive flow) |
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Where is the fuel temp for the E1 (2) FUEL LO TEMP caution measured? |
Leaving the FCOC (Fuel temp in the engine has dropped below 5 degrees C) |
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Where is the MFD fuel tank temp measured? |
Left fuel tank (Minimum Tank Temp is -54 degrees C) (FUEL TANK LO TEMP caution will display at -40 degrees C) |
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How does fuel flow from the wing tip to the wing root? |
Gravity (Collector box is kept full with flapper valves and the ejector pump) |
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What is the purpose of the fuel tank vent system? |
To prevent the sealed wing tanks from being damaged by excessive positive or negative pressure. |
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How are the fuel tanks vented? |
There is a surge box near the wing tip vented by a NACA duct, connected to the fuel tank via two float valves.
(One float valve is next to the surge box and one is near the wing root.) |
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How many fuel pumps are there and how are they powered? |
3 electric fuel pumps per tank.
Pump A: On-side Essential Pump B: Cross-side Essential Pump C: On-side DC |
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How many pumps are active during normal flight? |
1 (Desired pump should be selected and Pump Power turned ON) |
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When will the standby pumps cycle on? |
When the fuel pressure falls below 6.5 psi.
(The standby pumps will cycle on and off in unison to maintain greater than 6.5 psi until an operative pump is selected) |
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If all electric pumps fail, will the engines still operate? |
Yes, up to 25,000 ft.
(The FPMUs are capable of producing sufficient suction up to 25,000 ft.) |
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What happens when LOW 1 is selected? |
The left tank's electric pumps are turned off and the crossfeed valve is opened. |
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Can fuel be transferred from tank to tank? |
No. |
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Where does the APU normally draw its fuel? |
From the Right tank. (TANK 1 ON and LOW 2 selected will allow fuel to flow to the APU from the Left tank.) |
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When will the E1 (2) FUEL LO PRESS caution be displayed? |
When fuel pressure drops below 6.5 psi. |
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In Essential Power mode (loss of all generators) and Pump C selected, will the engines flame out? |
No. (The A and B pumps will cycle on in unison to maintain fuel pressure. This is not displayed because the MFDs will be unpowered.) |
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Does one pump provide sufficient pressure for flight? (Such as during cross-feed operation) |
For all phases of flight except take-off and go-around. |
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When will the FUEL IMBALANCE caution be displayed? When will the FUEL EQ XFEED OPN caution be displayed? |
FUEL IMBALANCE: 800 lb difference (You have exceeded the limitation!) FUEL EQ XFEED OPN: 100 lb difference, crossfeed valve open |
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What happens to the associated fuel system when the Fire Handle is pulled? |
The Engine Fuel Shutoff Valve (in the wing root) is closed.
(This is the only way to close this valve.) |
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Can a pilot authorize and supervise defueling? |
No. (Defueling must be authorized by TSA maintenance and supervised by TSA or on-demand maintenance.) |
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Does the pressure refueling panel require generator or GPU power? |
No. (It is on the Hot Battery Bus.) |
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When will the APU Fuel Shutoff Valve close? |
APU Master set to OFF
APU Stop button pressed
APU Fuel Shutoff button pressed
APU Fire Extinguishing button pressed
Automatically on the ground when a fire is detected or other failure is detected. |
