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allows the required total aircraft fuel quantity to be preselected. In automatic mode, the
fuel quantity gauging computer controls the distribution of the fuel by filling the wing
tanks before allowing any excess to be loaded into the center tank. High level
detectors located at the top of each tank prevent fuel tank overfilling during refueling
operations by closing the refuel shut-off valves.
Refueling of individual tanks is possible in manual mode by manually opening and
closing the refuel shut-off valves from the control panel.
The defuel mode is similar to the manual mode except that defueling is selected.
The test mode checks that the fuel quantity gauging computer, high level detectors and
refuel/defuel shutoff valves are operating properly.
Vol. 1 13--50--4
FUEL SYSTEM
Refueling and Defueling REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Refuel/ Defuel Control Panel
Figure 13---50---2 Sheet 1
Refuel/Defuel Control Panel
INC.
DEC.
ON
OFF
PRES. TOTAL QTY
FUEL AUTO
OFF
DEFUEL TEST
FUEL
MANUAL
LAMP
TEST
ON
POWER
FAULT
ANNUNC.
FUEL QTY
BITE
INITIA.
RIGHT
CL OP
ON
OFF
LEFT
H.LEVEL DETECTOR
CL OP SOV
ON
OFF
CL OP SOV
ON (green)
Indicates that battery
bus power has been
applied to the panel.
POWER (Guarded)
Supplies power
directly from the
battery bus to the
control panel.
FAULT ANNUNC. (amber)
Indicates that a fault exists
in the refuel/defuel system.
BITE INITIA.
Used to display fault
codes on the fuel
quantity displays.
Refer to the Airplane
Maintenance Manual for
code descriptions.
Mode Selector
TEST -- Verifies operation of
refuel/defuel shut--off valves
and high level detectors.
LAMP TEST
Used to test all lights
and LED displays on
the panel.
Vol. 1 13--50--5
FUEL SYSTEM
Refueling and Defueling REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
Refuel/ Defuel Control Panel
Figure 13---50---2 Sheet 2
HIGH LEVEL
DETECTOR
(amber) (3)
Indicates that the
fuel level in the
respective tank
has reached the
full capacity.
PRES. TOTAL QTY
Displays the fuel
quantity target for
automatic refueling.
ON / OFF
Used to start and stop
automatic refueling.
INC. / DEC.
(spring loaded to center)
Used to increase and decrease
the preselected total fuel
quantity for automatic refueling.
Unit of Measure Label
Indicates the unit of
measure for the fuel
quantity displays.
Fuel Quantity Displays (3)
Displays the fuel quantity of
the respective tank.
SOV CL (green) (3)
Indicates that the
respective refuel/defuel
shut--off valves (SOV)
are closed.
SOV OP (amber) (3)
Indicates that the
respective refuel/defuel
shut--off valves (SOV)
are open.
Mode Selector
FUEL AUTO -- Configures
refuel/defuel system for
automatic refueling.
FUEL MANUAL -- Configures
refuel/defuel system for
manual pressure refueling.
DEFUEL -- Configures
refuel/defuel system for
suction defueling.
OFF -- Shuts off refuel/defuel
system.
SOV switches (3)
ON -- Opens respective
shut--off valve
(SOV OP light comes on).
OFF -- Closes respective
shut--off valve
(SOV CL light comes on).
INC.
DEC.
ON
OFF
PRES. TOTAL QTY
FUEL AUTO
OFF
DEFUEL TEST
FUEL
MANUAL
LAMP
TEST
ON
POWER
FAULT
ANNUNC.
FUEL QTY
BITE
INITIA.
RIGHT
CL OP
ON
OFF
LEFT
H.LEVEL DETECTOR
CL OP SOV
ON
OFF
CL OP SOV
700fcom1_135002aa02.cgm
Vol. 1 13--50--6
FUEL SYSTEM
Refueling and Defueling REV 3, May 03/05
Flight Crew Operating Manual
CSP C--013--067
B. System Circuit Breakers
SYSTEM SUB--SYSTEM CB NAME BUS BAR CB
PANEL
CB
LOCATION
NOTES
Refueling and Refuel EMER REFL APU BATT
5
B5
Defueling Defuel FUEL DEFL
DIRECT BUS B4
Vol. 1 13--60--1
FUEL SYSTEM
Fuel Quantity Gauging Sep 09/02
Flight Crew Operating Manual
CSP C--013--067
1. FUEL QUANTITY GAUGING
A fuel quantity gauging computer monitors and controls the operation of the fuel system.
The computer uses information from the fuel system to calculate the fuel quantity.
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