Cessna 402B 1973 - Fire System Operating Checklist

If an
overheat
condition
is detected; the appropriate
FIRE light
will
annwrciate
the
engine to be
extinguished.
To activate the extinguisher,
open the
guard
for
the appropriate
engine
ard
press
the
FIRE light. Freon,
under
pressure,
will be
discharged to the engine and
engine
accessory
compartments.
The
amber tight E
(Figure
7-2)
will
illuminate
after
the
extinguisher
has been
discharged
and will
continue
to
show
empty until a
new
bottle is installed.
The FIRE
light
will
remain
illuminated
until
com-
partment
temperatures. cooL
OPERATING
CHECKtIST
Normcil
Proced'ures
Before
Takeoff
(1)
Press
the
test
switch
-
alt lights should
illuminate.
Emergency Proc.edures
If a fire
warning light
indicates
an engine
compartment
fire
and
is
confirmed
or
if
a fire
is observed
rvithout
a fire
waining
light:
(1)
Shut
down the
appropriate engine
as follows:
(a)
Mixture
control
-
IDLE
CUT-OFF.
(b)
Propeller
- FEATHER.
(c)
Magnetbs
- OFF.
(d)
Fuel
selector
-
OFF.
(e)
Cowl flaps
-
CI,O,SED.
(2)
Qpen
the appropriate
guard
and
push
FIRE
Ught.
(3)
Land as soon
asi
practical.
NOTE
Better
nesults
may be
obtained if the airflow
through
,
the nacelle
is
reduced
by slowing
the aircraft
(as
slow
as
practical)
prior
to
actuating
the
extinguisher.
SERVICING
The
system
should
be
checked
each 100
hours
or arurual
inspection,
whichever
occurs
first.
7
-L2