GEAR m
MOMENT ABOUT RH MAIN
GEARm.kg
1 42194 33122 7.365 12.707 420881.25
2 42194 33122 7.365 –2.023 –67005.80
1A 3688 2895 20.142 25.484 73776.18
2A 3688 2895 20.142 –14.8 –42846.0
Trim 6121 4805 0.0 5.342 25668.31
TOTAL FUEL MOMENT 410473.94 m.kg
Fuel Moment Table withFuel Remaining in the tanks Table 4
COLUMN 1 2 3 4 5 6
CELL N° CAPACITY
litres
(From table)MASS
kg
Y-ARM ABOUT AIRCRAFT CENTERLINE (From table)
m
Y-ARM ABOUT RH MAIN
GEAR m
MOMENT ABOUT RH MAIN
GEARm.kg
1 104 81.64 2.75 8.092 660.63
2 96 75.36 2.70 –2.642 –199.10
1A 1 0.785 17.866 23.208 18.21
2A 921 772.98 18.00 12.658 –9151.48
Trim 6 4.71 0.0008 5.342 25.16
TOTAL FUEL MOMENT – 8646.58 m.kg
Fuel Moment Table withFuel that you Cannot Drain (LH Wing) Table 5
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2-33 Page 19 JAN 01/96 Aircraft Reference Axis (A330-300)
Figure 1
2-33 Page 19A JAN 30/98 Aircraft Reference Axis (A330-200)
Figure 1A
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2-33 Page 20 JAN 01/96 Type and Position of Loads Acting on Aircraft
Figure 2
2-33 Page 20A JAN 30/98 Type and Position of Loads Acting on Aircraft
A330 withCenter Tank Figure 2A
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2-34 Page 1 JAN 30/98 DEFUELING
1. General
This topic deals with defuelling of the -300 and -200 models of the A330 aircraft. It is not possible to provide all the configurations or the
conditions of a damaged aircraft. Therefore specific operations to defuel the aircraft before recovery, can not be given. In some conditions it will be necessary to use the procedures given in the Aircraft Maintenance Manual (AMM).
The preparation and description that follows is made at Post Mod. 40176. This optional modification introduces a refuel/defuel coupling in the LH wing.
The A330-200 model is fitted with an optional center tank in the center section of the aircraft.
2. Precautions
Before you start to defuel the aircraft you must make sure that :
– the safety zone (Ref. Fig. 1) is identified to prevent the entry of persons that are not necessary to the defuel operation
– all equipment and materials that are not necessary for the defuel operation are moved out of the safety zone
– the safety and the fire fighting equipment, and the personnel approved to operate it, are in place
– the fuel tankers are in the correct position – the escape lanes for the fuel tankers are clear
– the fuel tankers have sufficient capacity to defuel the aircraft – the aircraft and fuel tankers are grounded correctly
– you use only the electrical equipment necessary for the defuel operation – you do not operate the aircraft main engines or the APU during the defuel
operation
– the electrical equipment that you use will not cause a spark – caps are installed on all damaged fuel pipes
– damaged electrical wiring and fuel pumps are isolated – you use only fuel pumps that are serviceable
– do not do a defuel procedure in bad weather conditions, lightning is dangerous
– do not operate radio or radar equipment during the defuel operation – immediately flushaway withwater, or remove, fuel spillage.
3. Preparation (Ref. Figs. 2 and 3)
A. Put the access platforms in position, below the access panels 522HB and 622HB.
B. Open the panels 522HB and 622HB.
C. Remove the refuel/defuel coupling caps from the refuel/defuel couplings.
D. Make sure that the couplings of the fuel supply hoses are clean.
E. Connect the fuel supply hoses to the refuel/defuel couplings.
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2-34 Page 2 JAN 30/98 F. Open the access panel 198DB in the RH belly fairing.
CAUTION : THE GROUND POWER UNIT (GPU) MUST NOT BE CONNECTED TO THE AIRCRAFT IF THE DEFUEL OPERATION IS TO BE DONE WITHOUT ELECTRICAL POWER.
CAUTION : THE AIRCRAFT ELECTRICAL SYSTEM MUST NOT BE ENERGIZED, IF THE DEFUEL OPERATION IS TO BE DONE WITHOUT ELECTRICAL POWER.
G. If necessary, and if it is safe to do so, put the GPU in a position as far from the aircraft as possible. The GPU must have 3 phases, with 115 volts at 400 Hz and supply 20 KVA.
H. If necessary, and if it is safe to do so, connect the GPU to the aircraft and energize the aircraft electrical system.
I. If necessary, start the Electronic Instrument System (EIS) and the Electronic Centralized Aircraft Monitoring (ECAM).
4. Defuel (Ref. Figs. 2 and 3)
In the leading edge of both LH and RH wings there is a refuel/defuel coupling. This is the interface between the refuel/defuel system and the external source.
Each refuel/defuel coupling can have two refuel/defuel hoses connected to it.
The aircraft can then be defueled through one or more of the refuel/defuel adaptors.
CAUTION : IF ONLY ONE REFUEL/DEFUEL COUPLING IS USED IT MUST BE THE ONE IDENTIFIED – USE THIS ADAPTOR TO DEFUEL.
There are two ways to defuel an aircraft. These are :
– with a pressure defuel (the aircraft fuel-pumps supply the fuel pressure for the defuel)
– with a suction defuel (the external defuel source supplies the suction to remove the fuel).
These two ways can be used at the same time to increase the defuel rate.
When the aircraft is at the usual lateral and longitudinal angles, gravity will act upon the fuel in the tanks. At these angles most of the fuel in the tanks can be removed.
Fuel will move from the trim tank into the fuel gallery. From the fuel
gallery it will move to the refuel/defuel couplings and out of the aircraft.
The defuel can be done in these electrical conditions :
– an electrical GPU connected to the aircraft electrical system
– the aircraft batteries or the APU connected to the aircraft electrical system
– no aircraft electrical power available.
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2-34 Page 3 JAN 30/98 In the condition of, when no aircraft electrical power is available, you must remove the electrical actuators and operate the fuel valves manually. You can then power the fuel pumps with an independent electrical supply and a wiring harness.
You cannot start a pressure defuel unless all the wing inlet valves are closed.
This prevents the possibility of a tank overflow, because the inner tanks have no fuel hi-level sensor protection during a defuel. It is only possible to
pressure defuel the inner fuel tanks and the optional center tank. To defuel the other fuel tanks, the fuel must first be moved to the inner tanks or the
optional center tank.
To fully defuel the trim tank in the Trimmable Horizontal Stabilizer it must be set to the zero position. The Fuel Control and Monitoring System (FCMS) prevents a defuel of the wing tanks until the trim tank is empty.
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2-34 Page 4 JAN 30/98 Safety Area and Fueling Zone
Figure 1
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2-34 Page 5 JAN 30/98 Refuel/Defuel Coupling
Figure 2
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2-34 Page 6 JAN 30/98 Refuel/Defuel Control Panel 990VU – Component Location
Figure 3
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2-34 Page 7 JAN 30/98 5. Defuel Procedures
There are four procedures you can use to remove fuel from an aircraft.
These are :
– a pressure defuel withelectrical power – a suction defuel withelectrical power – a pressure defuel without electrical power – a suction defuel without electrical power.
A. Pressure Defuel withElectrical Power (Ref. Fig.3,4 and 5)
NOTE : The pressure defuel is controlled from the cockpit overhead panel 245VU.
(1) In the Cockpit
(a) Push in the FUEL pushbutton switch (P/BSW) and make sure that the ECAM system Display Unit shows the FUEL page.
(b) Read and make a record of the fuel quantities.
(2) On the Refuel/Defuel Control Panel 990VU :
(a) Make sure that the REFUEL-DEFUEL-VALVES (switches 5QU1, 5QU2, 6QU1, 6QU2 and 8QU) are in the NORM (guarded) position (7QU also, on the -200 model).
(b) Set the MODE SELECT switch (3QU) to the DEFUEL position.
(c) Lift the guard and set the TRANSF VALVE switch (11QU) to OPEN.
(3) Defuel of the trim tank and the trim pipe until empty.
(a) On the overhead panel 245VU, push in the T TANK MOSE P/BSW
(21QL) and put the T TANK FEED (fuel isolation) switch (13QN) to the open position. Make sure that :
1 The FWD light comes on 2 The FUEL page shows :
– the trim-tank isolation valve symbol is in-line (valve open) – the forward-transfer triangular symbol is in view (fuel
transfer in operation).
(b) Monitor the fuel contents, and make sure that the trim tank fuel contents figure decreases.
(c) Continue the defuel until the trim-tank fuel quantity indication is zero and the inner-tank fuel quantity indications are stable.
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2-34 Page 8 JAN 30/98 (d) Release out the T TANK MODE P/BSW and put the T TANK FEED switch
to the AUTO position. Make sure that : 1 The FWD light goes off.
2 The FUEL page shows :
– the trim-tank isolation valve symbol is cross-line (valve closed)
– the forward-transfer triangular symbol is not in view (fuel-transfer not in operation).
(4) Defuel of the Center Tank until it is empty (-200 model).
(a) Push in the L TRANSFER and R TRANSFER switches. Make sure that : – the OFF lights go off
– on the ECAM, the FUEL page shows the L and R TRANSFER fuel-pump symbols are in-line (pumps in operation).
(b) Operate the pumps until a pump FAULT light comes on.
(c) Release out the L and R TRANSFER P/BSWs. Make sure that : – the OFF light comes on
– the FUEL page shows that the L and R TRANSFER fuel pump symbols are cross-line (pumps not in operation)
– the FAULT light goes off.
(5) Defuel the wing tanks until they are empty.
(a) Push in the L1, L2, R1, R2 P/BSWs to start the pumps. Make sure that :
– the OFF lights go off
– the FUEL page shows the related fuel pump symbol is in-line (pump in operation).
NOTE : During a defuel the fuel pumps can empty the fuel
collector cell faster than the collector cell can fill.
You must let the collector cell fill again before the defuel can continue.
(b) Operate the pump until a TANK pump FAULT-light comes on.
CAUTION : DO NOT LET THE FUEL PUMPS OPERATE FOR MORE THAN 15 MINUTES WITH THE FAULT LIGHT ON. THIS PREVENTS DAMAGE TO THE FUEL PUMPS.
(c) Release out the TANK P/BSW. Make sure that : – the related FAULT light goes off
– the related TANK P/BSW OFF light comes on
– the FUEL page shows the related fuel pump symbol is cross-line (pump not in operation)
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2-34 Page 9 JAN 30/98 (d) Repeat this operation for each of the fuel pumps as necessary.
(e) On the ECAM make sure that the FUEL page shows :
– the trim-tank isolation valve symbol is cross-line (valve closed)
– the forward fuel-transfer symbol is not in view (fuel-transfer not in operation)
– the fuel pump symbols are cross-line (pumps not in operation).
B. Suction Defuel withElectrical Power (Ref. Fig.3)
NOTE : A suction defuel is controlled from the Refuel/Defuel Control Panel 990VU.
(1) On the Refuel/Defuel Control Panel 990VU :
(a) Set the TRIM TK REFUEL-DEFUEL-VALVES switch (8QU) to the OPEN position.
(b) Set the REFUEL-DEFUEL-VALVES switches (5QU1, 5QU2, 6QU1 and 6QU2) to the OPEN position (on -200 models set 7QU to the OPEN position).
(c) Set the MODE SELECT switch 3QU to the DEFUEL position.
(2) Defuel the trim tank, the wing tanks and the center tank until empty.
(a) At the fuel tanker :
1 Operate the tanker suction motor.
2 Set the applicable REFUEL VALVE switches to SHUT when each fuel tank becomes empty.
3 Stop the tanker suction motors.
4 Put the MODE SELECT switch to the OFF position.
5 Put the REFUEL VALVE switch(es) to the NORM position.
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2-34 Page 10 JAN 30/98 C. Pressure Defuel without Aircraft Electrical Power (Ref. Figs. 2, 6, 7 and
8)
WARNING : THE AIRCRAFT ELECTRICAL SYSTEM MUST BE SWITCHED OFF AND ISOLATED
When you pressure defuel an aircraft without electrical power you will find that the fuel quantity instruments do not operate. You must then : – manually operate all the defuel related valves
– isolate the fuel pumps from the aircraft electrical system
– use an External Wiring Harness (EWH) control box and power source to operate the aircraft fuel pumps
– use the aircraft Manual Magnetic Indicators (MMIS) to give an indication of the aircraft fuel contents.
When you pressure defuel without aircraft electrical power you must not : – energize the aircraft electrical system
– connect a GPU to the aircraft.
CAUTION : WHEN YOU DEFUEL WITHOUT ELECTRICAL POWER YOU MUST;
– KEEP THE BALANCE OF THE AIRCRAFT CORRECT
– DEFUEL THE TRIM TANK BEFORE YOU DEFUEL THE WING TANKS – REMOVE AN EQUAL QUANTITY OF FUEL FROM EACH WING.
(1) Aircraft Preparation
(a) Open the MLG doors and access panels to locate the refuel/defuel valves.
(b) Write down the position of the valves, so that you can return them to the original position after the defuel.
(c) Remove the electrical actuators and manually set these valves to the closed position :
– fuel inlet, trim-tank 5705QA
– fuel inlet, inner tank 5603QA1 and (5603QA2) – fuel inlet, outer tank 5600QA1 and (5500QA2) – fuel inlet, center tank (5501QA) (-200 Model) – auxiliary forward fuel transfer 5703QA
– fuel trim pipe isolation, center section 5701QA.
(d) If necessary, set these valves to the open position : – the fuel crossfeed (5300QA)
– the fuel trim-tank isolation (5702QA).
NOTE : The fuel crossfeed valve will allow you to defuel the complete aircraft from one wing. That is from either the LH wing or the RH wing refuel/defuel couplings. When you open the fuel trim pipe isolation valve 5701QA, you can remove the fuel in the transfer pipe.
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2-34 Page 11 JAN 30/98 (e) Disconnect the electrical actuators from the LH and RH STBY fuel
pumps and connect the EWH plugs P1 and P2.
NOTE : You can control the pumps from the switches on the EWH control box.
(f) Push and hold in the Manual Command Button (MCB) on the refuel/defuel isolation valves 502QU1 and (502QU2).
NOTE : The MCBs must be held in all the time the defuel is in progress.
(2) Defuel the trim tank
(a) Manually open these valves :
– the trim-tank isolation valve 5705QA – the auxiliary FWD transfer valve 5703QA
(b) Push and hold in the MCB on the refuel/defuel isolation valves 502QU1 and (502QU2).
(c) Set the pump switches on the EWH to ON.
CAUTION : DO NOT LET THE PUMPS OPERATE FOR MORE THAN 15 MINUTES WITH NO FUEL IN THE TANKS. THIS WILL PREVENT DAMAGE TO THE PUMPS.
(d) Monitor the fuel quantity receiver at the tanker until the trim tank is empty.
NOTE : There are no Manual Magnetic Indicators (MMIs) in the trim tank.
To monitor the fuel in the trim tank you must record the fuel quantity that is received at the tanker.
(e) To complete the defuel you must next : 1 Remove the fuel from the outer tanks.
2 Remove the fuel from the inner tanks.
(3) Defuel the outer tanks then the inner tanks.
NOTE : The inner tank high level protection does not function without power. You must use the MLIs to monitor the fuel levels.
(a) Manually open the outer tank inlet valves 5500QA1 and 5500QA2.
(b) Push and hold in the MCB on the refuel/defuel isolation valves 502QU1 and 502QU2.
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2-34 Page 12 JAN 30/98 (c) On the control box of the EWH, set the pump switches to on.
CAUTION : DO NOT LET THE PUMPS OPERATE FOR MORE THAN 15 MINUTES WITH NO FUEL IN THE TANKS. THIS WILL PREVENT DAMAGE TO THE PUMPS.
(d) Monitor the fuel quantities in the outer tanks with the MMIs when the flow to the tanker has become stable.
(e) To complete the defuel you must next remove the fuel from the inner tanks.
(f) To remove fuel from these tanks you must :
– manually set the inlet valves 5603QA1 and 5603QA2 to open – set the pump switches on the control box to on.
(g) Monitor the fuel quantities in all the tanks until they are empty.
NOTE : The aircraft MMIs can be used to give an indication of the fuel contents in the wing tanks.
(h) When the defuel is complete you must :
– return all the valves that you manually closed to the original position and install the electrical actuators
– release out the MCB which will return the refuel/defuel isolation valves to the normal position.
D. Suction Defuel Without Aircraft Electrical Power (Ref. Fig. 6 and 8) WARNING : THE AIRCRAFT ELECTRICAL SYSTEM MUST BE SWITCH OFF AND
ISOLATED.
NOTE : When you suction defuel an aircraft without electrical power you will find that the fuel quantity instruments do not operate.
You must manually operate all the defuel related valves.
CAUTION : WHEN YOU SUCTION DEFUEL WITHOUT AIRCRAFT ELECTRICAL POWER YOU MUST NOT :
– ENERGIZE THE AIRCRAFT ELECTRICAL SYSTEM – CONNECT A GPU TO THE AIRCRAFT.
CAUTION : WHEN YOU DEFUEL WITHOUT ELECTRICAL POWER YOU MUST : – KEEP THE BALANCE OF THE AIRCRAFT CORRECT
– DEFUEL THE TRIM TANK BEFORE YOU DEFUEL THE WING TANKS – REMOVE AN EQUAL QUANTITY OF FUEL FROM EACH WING
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2-34 Page 13 JAN 30/98 (1) Aircraft Preparation
(a) Open the MLG doors and access panels to locate the refuel/defuel valves.
(b) Write down the positions of the valves, so that you can return them to the original position after the defuel.
(c) Remove the electrical actuators and manually set these valves to the open position :
– fuel inlet valve, trim tank 5705QA
– fuel inlet inner valve, tank 5603QA1 and (5603QA2) – fuel inlet outer valve, tank 5500QA1 and (5500QA2) – auxiliary forward fuel transfer valve 5703QA
– trim tank isolation valve 5702QA – trim-pipe isolation valve 5701QA – APU isolation valve 5204QA
NOTE : The fuel trim-tank isolation valve 5702QA is used only if the transfer pipe to the trim-tank is to be defuelled.
(2) Defuel all tanks together
(a) Start the suction pumps on the fuel tanker. This will supply the necessary negative pressure of 0.76 bar (11 psi). This pressure is the maximum negative pressure allowed.
(b) Push and hold in the MCB on the refuel/defuel isolation valves 505QU1 and 502QU2.
NOTE : The MCB must be held in all the time the defuel is in progress.
(c) Use the MMIs to monitor the fuel contents in the tanks. You can also use the gauges in the tanker to monitor the fuel quantity removed.
(d) When each tank becomes empty, set the applicable fuel valve to the closed position.
(e) When the defuel is complete you must :
– stop the suction motors on the fuel tanker
– release out the MCB which will return the refuel/defuel isolation valves to the normal position
– return all the valves that you manually opened to the original positions and install the elelctrical actuators.
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2-34 Page 14 JAN 30/98 Cockpit Fuel Controls
Figure 4
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2-34 Page 15 JAN 30/98 Cockpit Fuel Indication
Figure 5
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2-34 Page 16 JAN 30/98 Refuel/Defuel Component Locations
Figure 6
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2-34 Page 17 JAN 30/98 External Electrical Wiring Harness and Control Box
Figure 7
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2-34 Page 18 JAN 30/98 Manual Magnetic Indicator Locations
Figure 8
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2-34 Page 19 JAN 30/98 6. Procedure to Drain the Remaining Fuel (Ref. Fig. 9)
When you have defueled an aircraft you will still have a quantity of fuel in the tanks. This fuel is the remaining fuel (unusable) that you cannot remove witha defuel.
A. Drain the unusable fuel that you cannot remove with a defuel WARNING : AIRCRAFT FUEL IS POISONOUS.
DO NOT GET THE FUEL IN YOUR EYES OR MOUTH.
DO NOT GET THE FUEL ON YOUR SKIN FOR A LONG TIME.
(1) Make sure that the fuel tank to be drained has been defuelled to the unusable fuel level.
(2) If necessary, put an access platform below the applicable water drain valve.
(3) Put a container witha minimum capacity of 200l (53 US gal) below the water drain valve.
(4) Put the hose in the container and install the drain tool in the water drain valve.
(5) Operate the drain tool to open the water drain valve.
(6) To prevent any leakage, continuously monitor the fuel flow into the container.
(7) When the fuel flow stops, operate the drain tool to close the water drain valve.
(8) Remove the drain tool from the water drain valve.
(9) Discard the drained fuel, (you must refer to your local disposal regulations).
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2-34 Page 20 JAN 30/98 Water Drain Positions and Drain Tool
Figure 9
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2-34 Page 21 JAN 30/98 7. Close-up
A. Stop the EIS and the ECAM if they have been used.
B. De-energize the aircraft electrical system and disconnect the GPU from the aircraft if it is has been used.
C. Remove the GPU from its position near the aircraft, if it has been used.
D. Close the access panel 198DB.
E. Disconnect the hoses from the aircraft refuel/defuel couplings and refit the refuel/defuel coupling caps.
F. Close bothaccess panels 522HB and 622HB and remove the access platforms from below the panels.
G. Disconnect all the ground cables from the tanker and the aircraft.
H. Move the fuel tankers away from the safety area and the fueling zone.
H. Move the fuel tankers away from the safety area and the fueling zone.