SECTION
4
NORMAL
PROCEDURES
(AMPLIFIED
PROCEDURES)
«~402C
MODEL
The
interior
inspection will
vary
according to the
planned
flight
and
the optional
equipment
installed.
Prior to
high-altitude
flights,
it
is
important to
check
the condition
and
quantity of
oxygen
face
masks
and
hose
assemblies.
The
oxygen
supply
system
should
be
functionally checked to
lensure that
it
is
in
working
order.
The
oxygen
pressure
gage
should
indi-
cate
300
to
1800
PS
I (44.0 cubi c foot
system)
or
300
to
1850
PS
I (114.9
cubic foot system) depending
upon
the anticipated requirements.
Sati sfactory operation
of
the
pitot
tube{
s)
and
stall
warning
trans-
mitter heating elements
is
detennined
by
observing a discharge
on
the
voltammeter
when
the
pitot
and
stall
heat switches are
turned
ON.
The
effectiveness
of these heating elements
may
be
verified
by
cautiously
fee1i
ng
the heat
of
·these
dev
ice s
wh
i 1e the switches are
ON.
If
the
emergency
landing gear extension T-handle
was
noticed to
be
partly extended during the cockpit
preflight
inspection, the
emergency
landing gear extension
blowdown
valve assembly should
be
reset at the
blowdown
bottle
in
the
left
nose
compartment.
Check
the valve assembly
position.
If
the
red
band
is
vi
sible,
the
blowdown
bottle
must
be
serviced
in
accordance with the airplane Service
Manual
before
flight.
If
the
red
band
is
not showing,
push
the cable towards the valve assembly, then
check
the
bottle
pressure
gage
for
normal
pressure.
Fl
ights
at night
and
in
cold weather involve a careful
check
of other
specific
areas
which
will
be
discussed
later
in
this
section.
BEFORE
STARTING
ENGINES
1-
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Preflight Inspection -
COMPLETE
(See
Figure 4-1).
Cabin
Door(s) -
LATCHED
and
SECURE.
Crew
Door
(If
Installed) -
CLOSED
and
LOCKED.
Control
Locks
-
REMOVE.
Seat, Seat Belts
and
Shoulder Harness -
ADJUST
and
SECURE.
Brakes
-
SET.
Fuel
Selectors - Left
Engine
-
LEFT
MAIN
(Feel
For
Detent).
Right
Engine
-
RIGHT
MAIN
(Feel
For
Detent).
Landing
Gear
Switch
-
DOWN.
Mixtures -
FULL
RICH.
Propellers -
FULL
FORWARD.
Throttles -
OPEN
ONE
INCH.
All
Switches -
OFF.
Circuit Breakers -
IN.
Emergency
Power
Alternator Field Switch -
OFF.
Emergency
Power
Avionics
Bus
Switch -
OFF.
Avionics
Bus
Switch -
OFF.
Auxiliary
Fuel
Pump
Switches -
OFF.
Battery
and
Alternators -
ON.
1
November
1979
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