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REFUELING/DEFUELING
DESCRIPTION
Refueling can be accomplished using either pressure or gravity refueling procedures. Pressure refueling is preferred, while overwing gravity refueling is only used when single-point refueling capabilities do not exist.
Suction defueling of the fuel tanks is accomplished by applying suction to the single-point refuel/defuel adapter with the refuel/defuel control panel configured for defueling. Defueling of the aircraft is not a pilot function and is carried out only by maintenance personnel.
COMPONENTS AND OPERATION FUEL COMPUTER
The dual-channel fuel system computer monitors and controls the refueling process. Each channel receives signals from the fuel system and aircraft attitude information from the AHRS. The computer uses the information to calculate the fuel weight.
PRESSURE FUELING
The refuel/defuel control panel controls all the refueling and defueling operations. It tests the integrity of the fuel system components and displays individual fuel tank quantities. The refuel/defuel control panel is located in the right wing root leading-edge fairing.
REFUELING AUTO MODE
In the AUTO MODE, the refueling personnel preselect the total fuel quantity through the INC/DEC switch. When the de-sired quantity is set, use the ON/OFF toggle switch to start refueling. The fuel system computer automatically directs the preselected quantity of fuel and is dispensed at 368.5 lbs per minute at 55 psi. When the desired quantity is reached, refu-eling will automatically stop. Reposition the ON/OFF toggle switch to OFF.
REFUELING MANUAL MODE
The manual mode allows refueling personnel to direct fuel to a specific tank by selecting the appropriate shutoff valve open or closed.
Sep 13/2004 Flight Crew Operating Manual Volume 2 REV 1 CSP 100-6
12-01-07 REFUELING/DEFUELING (Cont)
GROUNDING RECEPTACLES
Receptacles for grounding the aircraft to the refueling equipment are provided as follows:
-Adjacent to each gravity filler port
-Adjacent to the pressure refueling coupling
-Nose gear stud
SYSTEM TEST
The automatic pressure refueling, manual pressure refueling and automatic defueling procedures can be used after satisfac-tory tests on the refuel/defuel system. The tests are to verify that all panel lamps operate correctly, the SOVs operate correctly in manual and automatic modes.
Test the panel lamps with the following procedures: -Select power switch ON -Push Lamp Test button and verify all panel indication lamps illuminate -Connect fuel nozzle to the refuel/defuel adapter to supply fuel pressure -Select TEST position on the fuel selector switch -Verify H. LEVEL DETECTOR, SOV CL and OP lamps illuminate -Select OFF position on the fuel selector switch -Verify that only the SOV OP lamps illuminate Test the SOV operation with the following procedures: -Select FUEL AUTO position with the fuel selector switch and the two SOV toggle switches OFF -Verify SOV indication lamps are off -Select FUEL AUTO position with the fuel selector switch and the two SOV toggle switches ON -Verify SOV indication lamps illuminate OP -Select TEST position with the fuel selector switch and the two SOV toggle switches ON -Verify SOV lamps illuminate CL
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