BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 253

Figure 8-4. Engine Firex Bottle
The indicator (Figure 8-4) displays bottle pres-
sure in the range of from 0 through 1,500 psi.
Each bottle also contains a pressure switch
which operates at 275 psi to indicate that the
bottle pressure is too low to be useful.
NOTE
The Firex bottles are of the one-shot
type; that is, they may only be dis-
charged once. A discharged bottle
must be removed and replaced with
a fully charged bottle.
ENG FIRE Lights
These lights, located in the center of the
glareshield, are guarded switchlights. The
light portion is illuminated by its fire detec-
tion unit's output. The push-button switch
arms the associated squib of both fire bottles
and illuminates both BOTTLE ARMED lights.
Depressing the switchlight also energizes the
associated engine's fire shutoff relay which
then closes the engine fuel shutoff valve, the en-
gine-driven hydraulic pump shutoff valve, the
bleed-air shutoff valve and the left footwarmer
shutoff valve (if the left switchlight is pressed),
and shuts down the generator. The system in-
terconnection is shown in Figure 8-5.
8-6 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
BOTTLE ARMED Lights
These switchlights, located in the center of
the glareshield, illuminate when either ENG
FIRE light is depressed. If either bottle has
pressure below 275 psi, its associated light
will not illuminate.
Depressing an illuminated BOTTLE ARMED
light fires the appropriate squib and causes the
Firex bottle to discharge its contents into the
engine associated with the ENG FIRE switch-
light pushed.
Once the bottle contents have discharged, the
associated BOTTLE ARMED light extin-
guishes and an amber low-pressure light illu-
minates on the Firex monitor panel.
Firex Monitor Panel
This panel on the copilot's side console con-
tains the bottle LOW PRESS lights and the
SQUIB press-to-test switchlights.
Each bottle contains its own pressure switch
which operates at 275 psi. If the pressure in
the bottle drops below this level, the associ-
ated LOW PRESS light illuminates.
Whenever a LOW PRESS light illuminates, it
is accompanied by the FIRE FAULT and the
flashing master caution lights.
The SQUIB switchlights for the engine Firex
bottles have a split legend. When depressed,
the green lights in both portions of the legend
should illuminate.
The upper portion-L. SQUIB-tests the squib
in the left port of that bottle.
The lower portion-R. SQUIB-tests the squib
in the right port of that bottle.
These lamps test the squibs for continuity by
connecting the ground side of the lamp to the
squib coil. The current flowing through the
squib in this case is not sufficient to fire it.
FOR TRAINING PURPOSES ONLY
FlightSafety Canada L t é e
L t d .