Cessna 402B 1973 - Fire Detection and Extinguishing System

NOTE
The disengage
swi.tch removes
all
power
from
the
system and
places
motor and clutch
circuits
to
ground..,
Manual
Trim
- AS
REQUIRED.
FIRE
DETECTION
AND
EXTINGUISHING
SYSTEM
The
fire detection and
extinguishing system
consists of tJrree
major
components:
three heat sensitive
detectors located
in each
engine acces-
sory
compartment; an annunciator
and actuator
panel
(see
Figure ?-2);
and
a
compressed Freon single shot
gas
bottle
in each engine
accessory
compartinent.
A test
function
is
provided
to
test the system
circuitry.
when the test
switch
is
pushed
all lights
should
illuminate,
if
any
light fails
to illumi-
nate
replace the
bulb.
rf the green
light does
not illuminate
after
replac-
ing
the
bulb,
repLace firing
cartridge
in
fire
extinguisher.
Any othei
tigtrt
failure,
after
replacing
bulbs
and firing
cartridge,
irdic-ates
malfunction
in
unit or associated
wiring.
(2)
Annunciation
Legend
Color
Cause of
Illumination
Fire Red
Fire
condition
existing
in
engine
compartment
E
Amber
Fire extinguisher
con-
tainer
e.mpty
OK Green Fire
cartridge and
assoclated
wiring
is in
operational
condition
Figure
7-2
7
-tl