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71 Cards in this Set
- Front
- Back
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When the A320 has been refueled to maximum capacity, the fuel can expand by _____% without spilling in case the temperature rises. |
2 % |
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There are vent surge tanks in the ______ tanks. |
Outer |
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There are overpressure protectors in which tanks/areas? |
There is an overpressure protector in each vent, outer, and inner tank, and between the center tank and left inner tank. |
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Each inner tank can hold ______ kgs of fuel. |
Inner tank - 5,573 kgs |
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Each outer tank can hold _____ kgs of fuel. |
Outer tank - 691 kgs |
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The center tank can hold _____ kgs of fuel. |
Center tank - 6,476 kgs |
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The total fuel capacity of the A320 is ____ kgs of fuel |
Total fuel capacity - 19,004 kgs |
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How many main fuel pumps does the A320 have? |
6 main fuel pumps |
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In normal operation, each engine is supplied by one pump in the ______ tank, or two pumps in its ______________. |
In normal operation, each engine is supplied by one pump in the center tank, or two pumps in its own side wing tank. |
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The purpose of pressure relief sequence valves are to _______. |
Pressure relief sequence valves ensure that when all pumps are running, the center tank pumps will deliver fuel preferentially. |
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How does fuel transfer from the outer to inner tanks? |
Via two electrical transfer valves. |
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What is the purpose of the crossfeed valve? |
The cross feed valve allows both engines to be fed from one side, or one engine to be fed from both sides. |
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What kind of motor runs the cross feed valve? |
A double motor. |
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The two ways to close a Engine LP valve is _____. |
1. The engine master sw 2. ENG FIRE PUSH pb |
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True or false? Suction valves are held open in normal operation by pump pressure. |
False. Pump pressure holds the suction valves closed. |
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What do suction valves do? |
Suction valves allow engines to be fed by gravity if the inner tank pumps fail. |
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How many suction valves are in the center tank? |
Zero. The center tank has no suction valves. |
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The outer tanks begin transfering fuel to the inner tanks when the inner tanks empty down to ______ kg. |
750 kg |
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When the center tanks stop running, fuel is feed from the __________. |
Inner tanks |
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When the transfer valves open, when do they close? |
When open, the valves are latched open for the rest of flight. They will automatically close at the next refueling operation. |
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Each center tank pump stops, until approximately ____ kg of the fuel in its associated inner tank fuel has been used. |
500 kg. |
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The transfer valves are __________ powered. (Electrically?, Hydraulically?, Pneumatically?) |
Electrically |
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What happens to fuel after it goes into the vent surge tanks? |
Scavenge jet pumps move it to their related wing tank. |
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If a failure in the fuel system causes alot of fuel to enter the vent surge tank, what happens to the fuel? |
The fuel is dumped overboard through a vent duct. |
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What is the purpose of the vent surge tanks? |
To hold overflow fuel temporarily to prevent spillage during aircraft movement on the ground, or during rotation at take-off. |
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What is a FLSCU? What does it do? |
Fuel Level Sensing Control Unit - Controls the transfer of fuel from the outer cells to the inner cells. |
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If a transfer valve in the left wing tank opens, does anything happen to any of the other transfer valves? |
The matching transfer valve on the right wing opens simultaneously. |
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After the transfer valves are opened, what powers the fuel to transfer from the outer cell to the inner cell? |
Gravity |
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If a blockage in the vent system occurs, what kind of protection is provided against overpressure? |
Burst disks provide overpressure protection which are installed in the tanks and set to break at a specified limit. |
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What unit warms the fuel? |
The fuel is warmed by the onside IDG's Oil cooling system's heat exchanger. |
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What valve does the fuel return through, to return to the tank after it exits the IDG oil cooling system? |
FRV (Fuel return valve) |
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What two computers control the FRV? |
The FADEC and the FLSCU |
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Are there are differences between the kinds of pumps installed in the different fuel tanks? |
No, the fuel pumps are all identical and interchangable. |
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What is the purpose of the fuel pumps being held in collector cells? |
To ensure they are always submerged in fuel during all flight maneuvers. |
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Is it possible to replace a fuel tank even if it is full of fuel? |
Yes, it is possible because of the protective canisters that contain them make it possible. |
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At what temperature must a fuel pump be replaced? (Overheat) |
175° C |
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How long will the center tanks run for after the engine is started? |
The center tanks will run for 2 minutes after engine start, then shut off. |
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After take off, when will the center tanks begin running? |
After take-off, the center tanks will begin running when 500 kg of the onside inner tank has been consumed and the slats are retracted. |
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What happens if the inner tank gets full in flight? (due to fuel returning from the IDG recirculation system) |
The center tank will stop running until 500 kg of the inner tank has been used. |
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Where in the wing tank are the suction valves specifically located? |
In the collector cells. |
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If both of the center tank pumps fail, how can the fuel in the center tank be used? |
It is now unusable because there are no suction valves in the center tank. |
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Which side of the fuel system does the APU fuel pump run get its fuel feed from? |
The left hand side |
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What three things control the APU LP fuel shut off valve? |
1. APU Master switch 2. APU FIRE pb switch 3. APU Shut off switch (on the external panel) |
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FQI stands for? |
Fuel Quantity Indicating |
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What is a cadensicon? |
Candensicon (aka densitometer) is a sensor to measure the density of the fuel |
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What is a FLSCU, and what does it do? |
Fuel Level Sensing Control Unit, monitors the fuel level and temperature to control fuel transfer and helps to control the FRV. |
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How many FLSCUs are there? |
Two FLSCUs are part of the FLSS. |
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What is a MMI and what is it for? |
MMI is a Manual Magnetic Indicator that is used to read fuel quantity on the ground. Electical supply is not needed for it to be used. |
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What computer controls the refuel valves? |
The FQIC |
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In general, which fuel tanks get refueled first? |
The outer tanks. |
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During refueling, how do the inner tanks get refueled? |
They get refueled when the outer tank is full, fuel spills into the inner tank through a spill pipe. |
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How does the center tank generally get refueled? |
If the FQIC determines that the amount of fuel to be refueled will require some fuel to go into the center tank, it will refuel the center tank simultaneously with the wing tanks. |
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Which tanks is it possible to refuel via the overwing refuel caps? |
The wing tanks only. |
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If overwing refueling is required, how can the center tank get refueled? |
Overtank refueling is only available to the wing tanks. If it is required to refuel into the center tank, it is necessary to transfer fuel through the defuel/transfer valve using the wing tank fuel pumps. |
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How does the defueling process go? |
The main fuel pumps remove fuel from the tanks, through the defuel/transfer valve, into the refuel galley, and supply it back to the refuel coupling, where it can be removed from the aircraft. |
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What is the minimum fuel quantity for takeoff? |
1,500 kg |
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What quantity does the wing tank LO LVL warning come on the ECAM? |
750 kg |
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What is the maximum wing fuel imbalance between the Outer tanks? |
690 kg |
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What is the maximum wing fuel imbalance between the Inner tanks? (Answer is a range) |
1,500 kg to 2,250 depending on inner tank quantity
From full to when the heavier tank reads 2,250 kg |
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True or False.
It is prohibited to take off with the center tank fuel pumps to be operating. |
True. It is prohibited. |
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What is the maximum refueling pressure? |
50 psi |
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What is the maximum defueling pressure? (max suction) |
11 psi |
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What is the fuel temperature limit for Jet A? (Min to Max) |
-36° C to +52°C |
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What is the fuel temperature limit for Jet A1? (Min to Max) |
-43°C to +52°C |
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Fuel imbalance advisory comes on the ECAM when there is an imbalance of the wing tanks of at least ________ kg. |
1,500 kg |
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On the preflight, what three things should you be checking to ensure that the fuel was properly loaded? |
1. Fuel in the wing tanks should be balanced 2. Outer cells should be full 3. If there is fuel in the center tank, wing tanks must be full. |
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During flight, with the MODE SEL switch for the center tank is in AUTO, and the center tank becomes empty, will it shut off? |
It will shut off 5 minutes after it is empty. |
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If you suspect a fuel leak, should you balance the fuel using the cross feed? |
If you suspect a fuel leak, DO NOT attempt to balance fuel. |
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When are you required to correct a fuel balance in flight? |
Only when the fuel advisory is displayed |
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Can you take off if you read WING TK LO LVL on the ECAM? |
No |
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Why is fuel in the center tank regarded as unusable if the wing fuel temperature exceeds 30° not above FL 350 40° not above FL 300 49° not above FL 250 before engine start and if the flight level has been exceeded before the center tank fuel has been used? |
At high altitude with high fuel temperature, the pressure delivered by the center tank pumps become lower than the pressure delivered by the wing tank pumps. |
