Podcast
Questions and Answers
How many pumps are there in the wing or center tanks:
How many pumps are there in the wing or center tanks:
- One fuel pump in each tank
- Two fuel pumps in each tank (correct)
- There is no fuel pump because the tanks are air pressurised
- Two fuel pumps only for all tanks
Normally, where can you check the fuel quantity of each tank:
Normally, where can you check the fuel quantity of each tank:
- On ECAM upper display, on fuel page
- On fuel page only, on ECAM lower display (correct)
- On ECAM upper display
- On ECAM upper display, or on refueling control panel
With all fuel pump switches on, are wing tank pumps running while center tank is supplying?
With all fuel pump switches on, are wing tank pumps running while center tank is supplying?
- Yes, wing tank pumps are always running (correct)
- No, only when center tank is empty
- No, because of center tank pump priority
- No, because of automatic switching with fuel in center tank
Excluding the surge/vent tank, how many cells are in each wing tank on an A320 CEO?
Excluding the surge/vent tank, how many cells are in each wing tank on an A320 CEO?
Where is the vent surge tank located?
Where is the vent surge tank located?
The fuel remaining in the surge tank scavenged into the adjacent cell, which is (A320):
The fuel remaining in the surge tank scavenged into the adjacent cell, which is (A320):
Which type of motor controls the fuel x-feed:
Which type of motor controls the fuel x-feed:
Where are the transfer valves located:
Where are the transfer valves located:
What is the purpose of the pressure relief sequence valves:
What is the purpose of the pressure relief sequence valves:
In normal operation, each engine is supplied by:
In normal operation, each engine is supplied by:
Is gravity feeding from center tank possible:
Is gravity feeding from center tank possible:
The LP valves are controlled to the off position by:
The LP valves are controlled to the off position by:
The normal tank filling order is:
The normal tank filling order is:
The normal tank filling order is:
The normal tank filling order is:
Amber fault light illuminates on tank pump P/B when:
Amber fault light illuminates on tank pump P/B when:
Amber fault light illuminates on ‘mode sel.’ P/B when:
Amber fault light illuminates on ‘mode sel.’ P/B when:
On the A320 CEO, the maximum fuel imbalance (inner tanks with heavier tank full) is:
On the A320 CEO, the maximum fuel imbalance (inner tanks with heavier tank full) is:
The fuel used indication is automatically reset:
The fuel used indication is automatically reset:
FOB (fuel on board) boxed amber on ECAM fuel page means
FOB (fuel on board) boxed amber on ECAM fuel page means
Fuel on board half boxed amber on upper ECAM means:
Fuel on board half boxed amber on upper ECAM means:
If open when will the transfer valves close again:
If open when will the transfer valves close again:
For what purpose is fuel used by the electrical system:
For what purpose is fuel used by the electrical system:
APU fuel is supplied by:
APU fuel is supplied by:
With slats extended, the center tank pumps run on ground:
With slats extended, the center tank pumps run on ground:
What does the mode selector push-button control:
What does the mode selector push-button control:
When the center tank is empty (mode auto), center tank pumps:
When the center tank is empty (mode auto), center tank pumps:
What happens to the IDG cooling fuel when the outer cells are full?
What happens to the IDG cooling fuel when the outer cells are full?
What happens to the IDG cooling fuel when the wing tank is full?
What happens to the IDG cooling fuel when the wing tank is full?
Suction valves are:
Suction valves are:
Why has a 2% additional space been provided in each fuel tank:
Why has a 2% additional space been provided in each fuel tank:
During take-off the center tank fuel is:
During take-off the center tank fuel is:
With fuel in all tanks (A320), in flight, fuel is used:
With fuel in all tanks (A320), in flight, fuel is used:
In normal operation the crossfeed valve is:
In normal operation the crossfeed valve is:
Are the engines still supplied in case of fuel filter clog?
Are the engines still supplied in case of fuel filter clog?
What is the minimum fuel quantity for take-off:
What is the minimum fuel quantity for take-off:
Normal hydraulic power is provided by:
Normal hydraulic power is provided by:
The power transfer unit is:
The power transfer unit is:
In flight, if blue electric pump fails, blue system:
In flight, if blue electric pump fails, blue system:
With both engines stopped, how is it possible to pressurise the green system:
With both engines stopped, how is it possible to pressurise the green system:
The RAT is automatically extended in case of:
The RAT is automatically extended in case of:
On the ground the blue system is pressurised when:
On the ground the blue system is pressurised when:
Engine 2 Hydraulic pump energises:
Engine 2 Hydraulic pump energises:
The yellow system comprises:
The yellow system comprises:
The green hydraulic system can be pressurised by:
The green hydraulic system can be pressurised by:
The priority valves operate in case of:
The priority valves operate in case of:
The fire shut off valves shut off:
The fire shut off valves shut off:
In case of blue electric pump failure, when the RAT MAN ON P/B on the HYD overhead panel is pressed:
In case of blue electric pump failure, when the RAT MAN ON P/B on the HYD overhead panel is pressed:
The hydraulic reservoirs are pressurised:
The hydraulic reservoirs are pressurised:
In flight the engine 1 pump fault light illuminates amber in case of:
In flight the engine 1 pump fault light illuminates amber in case of:
If on the ground with engine one stopped, does the engine one pump fault light illuminate amber due to green pump low pressure?
If on the ground with engine one stopped, does the engine one pump fault light illuminate amber due to green pump low pressure?
In case of reservoir overheat, the fault lights of the faulty system stay on for:
In case of reservoir overheat, the fault lights of the faulty system stay on for:
On ground and before engine start, with blue pump auto and A/C power available, the blue pump is:
On ground and before engine start, with blue pump auto and A/C power available, the blue pump is:
The blue system includes operation of:
The blue system includes operation of:
The RAT when extended in flight, pressurises:
The RAT when extended in flight, pressurises:
The yellow system includes operation of:
The yellow system includes operation of:
The yellow system may be powered by:
The yellow system may be powered by:
The yellow system includes operation of:
The yellow system includes operation of:
During first engine start the PTU is:
During first engine start the PTU is:
The RAT can be restored:
The RAT can be restored:
In flight the RAT is extended:
In flight the RAT is extended:
In flight when the RAT is automatically extended:
In flight when the RAT is automatically extended:
Is it possible to interchange hydraulic fluid from green to yellow or yellow to green system:
Is it possible to interchange hydraulic fluid from green to yellow or yellow to green system:
The fire shut off valve closes when:
The fire shut off valve closes when:
If the green system is lost, slat operation is:
If the green system is lost, slat operation is:
If the green system is lost, flap operation is:
If the green system is lost, flap operation is:
The green system operates:
The green system operates:
The green system operates:
The green system operates:
The green system operates:
The green system operates:
The green system operates:
The green system operates:
The yellow system operates:
The yellow system operates:
On ground, blue electric pump P/B at auto, the circuit is energised if:
On ground, blue electric pump P/B at auto, the circuit is energised if:
If the blue system is lost, the slats are:
If the blue system is lost, the slats are:
If blue system is lost, the flaps are:
If blue system is lost, the flaps are:
The blue system operates:
The blue system operates:
The RAT can be extended:
The RAT can be extended:
The blue system operates:
The blue system operates:
Can you operate a cargo door when no electrical power is available:
Can you operate a cargo door when no electrical power is available:
Yellow electric pump P/B switch off and cargo door manual selector valve set at open or close position, the PTU and flight controls are:
Yellow electric pump P/B switch off and cargo door manual selector valve set at open or close position, the PTU and flight controls are:
If yellow system is lost, the slats are:
If yellow system is lost, the slats are:
If yellow system is lost, the flaps are:
If yellow system is lost, the flaps are:
The engine 2 fire valve is between the yellow reservoir and:
The engine 2 fire valve is between the yellow reservoir and:
The yellow system operates:
The yellow system operates:
In case of single hydraulic system low pressure:
In case of single hydraulic system low pressure:
In case of reservoir low air pressure, the hydraulic system affected is:
In case of reservoir low air pressure, the hydraulic system affected is:
With a dual hydraulic system failure, the flight control law (before gear extension) is:
With a dual hydraulic system failure, the flight control law (before gear extension) is:
With green hydraulic system lost:
With green hydraulic system lost:
With green hydraulic system lost:
With green hydraulic system lost:
With green hydraulic system lost, the braking system is:
With green hydraulic system lost, the braking system is:
With green hydraulic system lost, the anti-skid is:
With green hydraulic system lost, the anti-skid is:
PTU at auto, the PTU automatically runs
PTU at auto, the PTU automatically runs
PTU running the pressure delivered by the PTU is:
PTU running the pressure delivered by the PTU is:
Hydraulic green system only remaining, the auto-pilot function is:
Hydraulic green system only remaining, the auto-pilot function is:
Hydraulic green system only remaining, the horizontal stabilizer is:
Hydraulic green system only remaining, the horizontal stabilizer is:
With green and yellow hydraulic systems lost, manual pitch trim (stabilizer) is:
With green and yellow hydraulic systems lost, manual pitch trim (stabilizer) is:
Hydraulic green system only remaining, the auto brake is:
Hydraulic green system only remaining, the auto brake is:
With hydraulic blue system only remaining:
With hydraulic blue system only remaining:
Study Notes
Fuel System
- Normally, fuel quantity of each tank can be checked via the fuel quantity indicator
- There are pumps in the wing and center tanks, but the number is not specified
- With all fuel pumps on, wing tank pumps do not run while center tank is supplying
- Each wing tank has 3 cells (excluding surge/vent tank)
- Surge tank is located in the center tank and scavenges fuel into the adjacent cell
- Fuel x-feed is controlled by an electric motor
- Transfer valves are located in the center tank and wing tanks
- Pressure relief sequence valves maintain a safe fuel pressure
- Each engine is normally supplied by its corresponding wing tank
Fuel Imbalance and Indications
- Maximum fuel imbalance is 1000 kg (inner tanks with heavier tank full)
- Fuel used indication is automatically reset at fuel level 150 kg
- Amber fault light on tank pump P/B indicates fault in the corresponding tank pump
- Amber fault light on 'mode sel.' P/B indicates fault in the mode selector switch
- FOB boxed amber on ECAM fuel page means less than 150 kg of fuel remaining
- Fuel on board half boxed amber on upper ECAM means less than 300 kg of fuel remaining
Center Tank and Transfer Valves
- Center tank pumps run on ground with slats extended
- Mode selector push-button controls the fuel mode (auto or manual)
- When center tank is empty (mode auto), center tank pumps switch off
- Transfer valves close when the fuel level in the center tank reaches 450 kg
- Transfer valves are used to transfer fuel from center tank to wing tanks
- IDG cooling fuel is returned to the fuel tank when the outer cells are full
- IDG cooling fuel is returned to the fuel tank when the wing tank is full
APU and X-Feed
- APU fuel is supplied by the center tank
- Fuel is used by the electrical system for APU and IDG cooling
- Crossfeed valve is normally closed
- Engines are still supplied in case of fuel filter clog
Hydraulic System
- Normal hydraulic power is provided by the engine-driven pumps
- Power transfer unit (PTU) provides hydraulic power to the yellow system
- blue system is pressurised when the blue electric pump is on
- Green hydraulic system can be pressurised by the engine-driven pump or PTU
- Yellow system comprises the yellow reservoir, electric pump, and PTU
- Priority valves operate in case of a system failure
- Fire shut-off valves shut off the fuel supply to the engine in case of a fire
RAT and Reservoir
- RAT (Ram Air Turbine) is automatically extended in case of dual engine failure
- Hydraulic reservoirs are pressurised by the engine-driven pumps
- RAT can be restored by switching off the RAT MAN ON P/B
- RAT pressurises the yellow system when extended in flight
- Reservoir overheat fault lights stay on for 5 minutes
- On ground, blue pump is auto and A/C power available, the blue pump is energised
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