Defueling - BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual

• After 30–40 seconds, the SOV CLosed
light will illuminate and the OPen light
will extinguish , indicating that the au-
tomatic level control system is work-
ing properly.
• Test other SOVs and VVs individually
for other tanks to be filled.
• Rotate the MODE selector to FUEL.
• Check that all three VV OPEN lights
extinguish.
• E n s u r e t h a t t h e t a n k F U E L - D E F
switches of the tanks to be filled are in
the FUEL position.
• Check that the SOV OPen lights are il-
luminated. Add fuel to the desired level.
• When the selected tanks are full, their
shutoff valves will close automatically
and the SOV CLosed lights will illuminate.
• Move the tank switches to OFF.
• Rotate the MODE selector to OFF.
• Remove the fueling nozzle from the
adapter, reinstall the cover, and close
the door carefully.
• Check that all lights and switches are off
and stow the refuel-defuel control panel.
NOTE
Adding fuel will compress the land-
ing gear shock struts and lower the
airplane. Be sure that stands, ladders,
or other equipment that might dam-
age the airplane are removed before
refueling.
Do not chock forward of the nose gear wheels
during refueling as increasing the weight will
move the nosewheels forward.
If tanks are to be only partially filled, tank
levels must be monitored from the cockpit
5-14 CL 601-3R
CL-600-2B16 PILOT TRAINING MANUAL
quantity panel. For this, AC electrical power
must be provided, usually from the APU or
external AC unit.

DEFUELING

The airplane may be completely defueled
without the use of electrical power via the
single-point adapter.
Fuel tender suction of negative 8 psi (max-
imum) at the manifold will open the tank
shutoff valves and withdraw fuel. When the
tanks are empty, the valves will close by
spring pressure.
The tanks may be selectively defueled using
the refuel-defuel control panel in the DEFUEL
mode as follows:
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
• Move the power switch ( see Figure 5-
10) to ON and check that the green
POWER ON light illuminates.
• Connect the defueling nozzle from the
tender to the single-point adapter.
• Open the nozzle valve and check for a
maximum negative pressure of 8 psi.
• Rotate the MODE selector to the DE-
FUEL position.
• Move the tank switch for tank(s) to be de-
fueled to the DEF position. This allows
suction to open the associated shutoff
valve, illuminating the amber OPen light.
CAUTION
To prevent fuel tank damage caused
by negative pressure, always open
overwing filler port for the tank
being defueled as soon as tank quan-
tity is less than 4,000 pounds. Do
not open filler cap if tank contains
more than 4,000 pounds.
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