R  Fuel System - Wing and Center Tank 
R  Figure 001A (SHEET 1) 
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R  Fuel System - Wing and Center Tank 
R  Figure 001A (SHEET 2) 
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R  Fuel System - Wing and Center Tank 
R  Figure 001A (SHEET 3) 
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 Fuel System Control Switches
 Figure 002

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R  Fuel System Control Switches 
R  Figure 002A 
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 Engine and APU Fire Buttons and Engine Start Switches Figure 003
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 ECAM Displays and Control Panel
 Figure 004

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 ECAM Displays and Control Panel 
R  Figure 004A 
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 ECAM Displays and Control Panel 
R  Figure 004B 
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 Refuel/Defuel Control Panel 800VU Figure 005 
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 The vent surge tanks keep their related fuel tank open to the external air pressure. That is:
 -
the LH vent surge tank for the LH wing tank and the center tank

 -
the RH vent surge tank for the RH wing tank.
 If a blockage occurs to the flow of air through the vent surge tank,
 a burst disk keeps the pressure to a specified limit.

 The flame arrestors in the vent system intakes give protection against ground fires. The fuel system is protected from the effects of lightning through:

 -
the position of the vent intakes (which are outside lightning-strike zones 1 and 2 in the wing)

 -
the thickness of the wing skins.

 (3) Center Tank External Ventilating System (Ref. 28-13-00) The center-tank external ventilating-system makes sure that fuel and/or fuel gas (that comes out of the center tank) does not go into the air conditioning system (Ref. 21-00-00).

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 (4) intercell Transfer System (Ref. 28-15-00) The intercell transfer system controls the movement of fuel from the wing-tank outer cell to the wing-tank inner cell. Each wing tank has two intercell transfer valves in the bottom of the RIB15. Each intercell transfer valve has a related actuator that controls the position of the valve. The Fuel Level Sensing Control Units (FLSCUs) (Ref. 28-46-00), give an open or shut signal to the actuators of the intercell transfer valve. The FLSCUs will signal the actuators to open their related valves when the low level sensors of the related wing tank inner cell become dry.
 **ON A/C ALL
 (5) Fuel Recirculation for Cooling (Recirculation System) (Ref. 28-16-00) Part of the fuel supply to each engine is used for the IDG cooling-system (Ref. 24-21-00). During the oil cooling process this fuel becomes warm. The recirculation system returns the warm fuel from the IDG cooling system to the wing tank. The Full Authority Digital Engine Control (FADEC) system (Ref. 73-20-00) stops the recirculation system if:
 -
the fuel temperature increases to a high level

 -
the fuel flow rate to the engine is at a high level

 -
the engines have a gravity fuel feed only

 -
the fuel level in the wing tanks is low

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 -the fuel goes into a vent surge tank.

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 B. Distribution (Ref. 28-20-00)
 The distribution system makes sure that the fuel:
 -
is supplied to the two engines during all flight conditions
　
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