FUEL
Sep 13/2004
Flight Crew Operating Manual
Volume 2
REV 1
CSP 100-6
12-01-07
FUEL DISTRIBUTION (Cont)
APU FUEL SHUTOFF VALVE (SOV)
The APU fuel feed SOV is an electrically operated shutoff valve. In case of an APU fire, pushing the APU FIRE switch on
the ENGINE control panel, located on the center pedestal, closes the SOV. During normal operations, the SOV is automat-
ically controlled.
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.
REV 1
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