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tank systems, since the main and auxiliary overwing filler points are below the highest point of
the respective tank. Overwing filler caps are installed on each wing. The auxiliary tank gravity
refueling panel and cap are situated on the right wing root. The tail tank cannot be gravity
refueled.
NOTE
During overwing gravity refueling, the pilots must ensure the aircraft
is within center-of-gravity limits.
CAUTION
Do not open the overwing fueling caps unless the fuel quantity in
the main tanks is below the maximum capacities attainable
through overwing refueling.
Pressure Defueling
• Select DEFUEL on the POWER switch
• Ensure that the SOV switches of only those tanks that are to be defueled are in the
OPEN position, and the remaining SOV switches are in the CLOSED position
• Apply suction from the fuel truck (max −8 psi) at the fuel/defuel adapter
When the auxiliary tank or either main tank are fully defueled, their respective SOV CLOSED
(green) light will illuminate, and the associated (white) SOV OPEN light will extinguish.
When defueling is complete, move the applicable tank SOV switches to CLOSE.
NOTE
If defueling pressure is applied and the POWER FUEL/DEFUEL
switch is inadvertently selected OFF, fuel will be drawn from the
main and auxiliary tanks only. Any fuel in the tail tank system will
remain trapped, possibly creating a tail-heavy condition.
Gravity Defueling
The main and auxiliary tanks can be gravity defueled through a tank drain valve, which has an
integral check valve. The tail cone tank may be drained through the DC motor operated dump
valve.
The tank drain valves are installed on the lowest access cover of each tank, and sealed from the
outside with a screwed-in cover plug. A special adapter is required to operate the check valve
for gravity defueling operations.
FUEL SYSTEM
Description
Vol. 2 12−10−25
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS
FUEL Control Panel
Fuel Control Panel
Figure 12−10−18
FUEL SYSTEM
Description
Vol. 2 12−10−26
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
Fuel Quantity Indicators
Fuel quantity is displayed in the lower left corner of the EICAS primary page . The sum of all tanks
is displayed next to the word TOTAL. The next line indicates, respectively, left main, center
auxiliary and right main fuel quantity. The tail tank readout is on the last line. Fuel quantity and fuel
flow are normally displayed in lb (pounds) but can also be configured in kg (kilograms) at the
Completion Center.
Fuel quantity data can also be read on the optional interior refuel panel (behind the copilot seat).
NOTE
Total fuel quantity data must be entered in the FMS (PERF INIT page)
prior to flight.
Bulk Fuel Temperature Indication
Temperature is monitored by a probe in the left main tank, and displayed on the EICAS status
page. Numerals are green at temperatures above −37°C. At or below −37°C, the numerals are
amber, and an associated BULK FUEL TEMP caution EICAS message will be displayed.
Engine Fuel Temperature Indications
Temperatures are sensed by a probe located on the top of each engine’s fuel filter housing.
Numerals are green above 5°C, and amber if below 5°C. An associated L/R FUEL LO TEMP
caution EICAS message will be displayed.
Fuel Flow Indications
Fuel flow indications are displayed for each engine immediately below the N2 arcs on the primary
EICAS page. The normally green fuel flow indication will turn amber and display dashed lines if
fuel flow exceeds 5,000 pph (2,273 kg/h), or if the input value is invalid. Fuel flow can also be
viewed through FMS page selection.
FUEL SYSTEM
Description
Vol. 2 12−10−27
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
EICAS Fuel Information Display
Figure 12−10−19
Interior Optional Fuel/Defuel Panel
Figure 12−10−20
FUEL SYSTEM
Description
Vol. 2 12−10−28
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
Exterior FUEL/DEFUEL Panel
Figure 12−10−21
FUEL SYSTEM
Description
Vol. 2 12−10−29
REV 74, Nov 07/08
CL−604 Operating Manual
PSP 604−6
CONTROLS AND INDICATORS (CONT'D)
EICAS Primary Display − Fuel Readout
Figure 12−10−22
　
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