PRESSURE REFUEL -COMPONENT LOCATIONS -REAR SPAR
EFFECTIVITY BEJ ALL 28-21-00
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D633W101-BEJ Jan 05/2002
PRESSURE REFUEL -REFUEL STATION
General
There is a refuel station on the leading edge of the left wing. The refuel station has these components:
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Access door
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Access door switch
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Refuel adapter (2)
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Bonding point (2)
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IRP.
You use the IRP to control refuel and defuel operations.
Access Door
Two hold-open rods keep the access door in the full-open position. To close the access door, you must move a collar on each hold-open rod. There are four placards on the access door. They tell you about refuel and defuel procedures.
When the access door is open, the access door switch permits power to go to the IRP and the FQIS processor unit. The switch also controls the panel lights.
Integrated Refuel Panel
The IRP has these parts:
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Front panel
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Fuel quantity indicators in an electronics module
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Switches and lights
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Load select module.
The electronics module has two channels.
Refuel Adapters
The refuel adapters connect the fueling nozzles to the refuel system. The two refuel adapters are at the refuel station. The adapters attach to the front spar of the wing.
Each adapter has these parts:
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Break-away flange
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Check valve (not shown)
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Refuel/defuel handle.
The adapter check valve prevents fuel in the refuel/jettison manifold from flowing back through the adapters.
Training Information Point
The adapter grounds the fueling nozzles to the airplane. If there is electrical continuity between the fueling source and the fueling nozzle, it is not necessary to attach a bonding cable.
Caps are not required on the adapters.
The IRP is an LRU.
EFFECTIVITY BEJ ALL 28-21-00
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777 AIRCRAFT MAINTENANCE MANUAL
PRESSURE REFUEL -REFUEL STATION
EFFECTIVITY BEJ ALL 28-21-00
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D633W101-BEJ Jan 05/2002
777 AIRCRAFT MAINTENANCE MANUAL
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28-21-00
Page 14 D633W101-BEJ Jan 05/2002
PRESSURE REFUEL -INTEGRATED REFUEL PANEL
Overfill Test Switches
The overfill test switch starts the overfill test. This causes the overfill protection to immediately close all the refuel valves. You do the overfill test during refueling.
The overfill indication light is a red light that comes on when there is fuel in a surge tank, or when you do the overfill test. It stays on until the surge tanks are empty and the overfill reset switch is in the RESET position.
The overfill reset switch disables the overfill protection. It has two positions: NORMAL and RESET. The NORMAL position arms the overfill protection. The RESET position turns off the overfill protection.
Indicator Test Switch
The indicator test switch does a test of these indicators:
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Fuel quantity indicators
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Refuel valve position indication lights
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Defuel valve position indication light.
During the test, a test pattern shows in the fuel quantity indicators, and the valve position indication lights come on. If a fuel quantity indicator fails the test, all of its LEDs go off.
The IRP also does the indicator test when it initially gets power.
EFFECTIVITY
BEJ ALL
System Test Switch
You push the system test switch during refueling to do a test of the refuel system. During the test all the refuel valves close, two at a time, and the refuel valve position indication lights go off. Then, the valves automatically open, two at a time, and the lights come on again.
Load Select Quantity Selectors
The load select quantity selectors permit you to select fuel load quantity. There are four selectors. Each selector has a thumbwheel and shows a number. You turn the thumbwheel to set the related number of the fuel load quantity.
Defuel Valve Switch and Light
The defuel valve switch opens and closes the defuel valve.
The defuel valve open light is a blue light that shows the position of the defuel valve. It comes on when the defuel valve opens.
Power Switch
The power switch permits you to refuel the airplane when the ground handling bus does not have power. When you move the power switch to the battery (BATT) position, it causes the hot battery bus to send power to the refuel system.
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