R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The air inlet valve 161QM(162QM) is on the inboard face of RIB16. A pipe connects the air inlet valve to the refuel gallery. The air inlet valve lets air into the refuel gallery after a refuel procedure. Thus fuel can drain from the refuel gallery through the fuel drain valve 31QM(32QM).
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Defuel/Transfer Valve and Actuator - Location Figure 004
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**ON A/C 301-399,
An air inlet valve is in the refuel gallery, adjacent to the rear face of the front spar. The air inlet valve lets air into the refuel gallery after the refuel procedure. Thus fuel can drain from the refuel gallery through the fuel drain valve 31QM(32QM). A pipe extends from the air inlet valve to the outboard side of RIB21. This pipe makes sure that the air inlet remains above the fuel level at all times. This stops the gravity movement of fuel from one wing tank to the other.
**ON A/C ALL
A fuel drain valve 31QM(32QM) is installed at the lowest point of the refuel gallery in each wing (the outboard face of RIB1). Fuel pressure in the refuel gallery closes the fuel drain valves. When the pressure source is removed the valve opens to allow fuel to drain into the wing tank from the refuel gallery.
The refuel gallery is a fuel pipe that connects from the LH wing tank refuel valve through to the RH wing tank refuel valve. From this pipe, other branch pipes supply fuel, through diffusers, to the fuel tanks.
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
The sealed RIB15 (Ref. 28-11-00) divides the wing tank into an inner and an outer cell. During a refuel operation the outer cell is filled first. The refuel spill pipe connects the wing tank outer cell to the wing tank inner cell. Thus, when the wing tank outer cell is full the spill pipe lets the fuel move into the wing tank inner cell. A diffuser, on the spill pipe, makes sure that the fuel goes into the inner cell smoothly. The spill pipe has a check valve 54QM(55QM). During flight the check valve makes sure that fuel that goes into the spill pipe goes back to the outer cell.
**ON A/C ALL
Each wing tank has an overwing refuel adapter 42QM(43QM). This can be used to refuel the aircraft when a pressure refuel source is not available. During an overwing refuel, the fuel only goes into the wing tank. It is then necessary to do a ground fuel transfer to get the fuel into the correct fuel-load configuration. The adaptor has an overwing refuel cap 44QM(45QM) which gives access to and seals the adaptor. The refuel adaptor and cap are installed in the upper wing surface (between RIB19 and RIB20) and has an electrical ground point adjacent to it.
1EFF : ALL 1 28-25-00Page 17 1 1 Aug 01/05 1 1 1CES 1 The pressure relief valve 97QM is installed in the RH RIB1. If a center tank overflow occurs the pressure relief valve releases the fuel into the RH wing tank.
4. Power Supply
____________
**ON A/C 001-049, 051-099, 101-105, 151-154, 201-207,
(Ref. Fig. 005) R **ON A/C 106-149, 155-199, 208-299, 401-499,
(Ref. Fig. 005A)
**ON A/C 301-399,
(Ref. Fig. 005B)
**ON A/C ALL
5. Interface
_________
(Ref. Fig. 006)
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INTENTIONALLY BLANK
R 1 1
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1 1 May 01/05 1 1 1CES 1
Refuel/Defuel System - Circuit Diagram Figure 005 (SHEET 1)
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Refuel/Defuel System - Circuit Diagram Figure 005 (SHEET 2)
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Refuel/Defuel System - Circuit Diagram Figure 005 (SHEET 3)
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Refuel/Defuel System - Circuit Diagram Figure 005 (SHEET 4)
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Refuel Defuel System - Circuit Diagram
Figure 005A (SHEET 1)
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Refuel Defuel System - Circuit Diagram
Figure 005A (SHEET 2)
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Refuel Defuel System - Circuit Diagram
Figure 005A (SHEET 3)
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