BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 256

APU FIRE Light
The unguarded APU FIRE switchlight is lo-
cated in the center of the glareshield (Figure
8-7). The light portion is activated by the APU
fire detection unit. In the event of a fire, the
APU is automatically shut down.
The switch portion, when depressed, ensures
that the APU fuel and air valves close, illu-
minates the BOTTLE ARMED light, and arms
the APU Firex bottle squib circuit.
NOTE
If the FIRE switchlight is depressed
without being illuminated, the APU
will shut down.
APU FIREX
BOTTLE
Figure 8-7. APU Fire-Extinguishing System
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
BOTTLE ARMED Light
This switchlight, located adjacent to the FIRE
light, illuminates whenever the FIRE light is
depressed and the Firex bottle has sufficient
pressure. Depressing the BOTTLE ARMED
switchlight, when illuminated, fires the APU
bottle squib and discharges the bottle con-
tents into the APU compartment.
Once the bottle contents have discharged, the
BOTTLE ARMED light extinguishes and an
amber low-pressure light illuminates on the
Firex monitor panel.
L t é e
L t d .
CL 601-3A/R 8-9