Cessna 402B 1973 - Turbocharged Engine System Overview

PITOT HEAT SWITCH
When the
pitot
heat switch is
placed in
the ON
position,
the
heating
ele-
ments
in
the
pitot
tube,
stall warning
transmitter
and the
main fuel
tank
vents are
electrically heated to
maintain
proper
operation
of
the
system
during
icing
conditions.
The switch
should
always
be
in
the OFF
position
while
on the
ground
to
prevent
ovelheating
of
the
heating
elements.
EMERGENCY
EXIT
AIRCRAfT
SERIAL
NO.4O2BOOOI
THRU 4O2BO2OO
For
emergency
exit,
the
forward oval cabin
window
on
the
right side
of
the
passengers
compartment
can
be
jettisoned.
PUII
off
the
plastic
cover
over the
emergency
release
handle under
the
window
and
puII
the
handle
to
release
the
bottom
pins.
Next
pull
out the
red
lever
to
loosen the
emer-
gency
exit window, then
ptsh
the
window
out.
AIRCRAFT
SER,IAL
NO.4O2BO2OI
AND
ON
For emergency
exit,
the
forward
oval cabin window
on
the
right side
of
the
passengers
bompartment
can
be
jettisoned.
PuII off
the
plastic
cover
over
the
emergency
release handle
under the
window
and
pull
the
handle
to
release
the
bottom
pins,
then
push
the
window out.
TURBOCHARGED
ENGINE SYSTEM
Your aircraft
is equipped
with
turbocharged
engines
which
make it
pos-
sible
to.
maintain sea
level
hors-epower to
16,
000
feet.
Except
for'being
turbocharged,
the
engines
work
and act
just
like any
norrnally
aspirated engines.
However,
because
the
engines
areturbo-
charged,
some of
the
engine
characteristics
are
different.
The
intent
of
this
section is
to
point
out some
of
the
items
that
are affected
by
turbo-
charging,
and outline the corect
procedures to be followed
so
that
opera-
tion
becomes easier
and
simPler
For
a better understanding
of the turbo
system,
letts fo1low
the
induc-
tion
air
through
thg
engine until
it is
expelled
as exhaust
gases.
Refer-
ence should be madetothe
Turbo
System
Schematic shown in
Figure 2-11
as
you
read
through the
following steps.
(1)
Engine
induction
air is
taken
in
ttrrough
an
intake at the
leading
edge
of
the
wing
inboard
of the
engine at which
point
it
passes
through
a
filter
and then
into
the compressor
(2)
The compressor
compresses
the
induction aii.
(3)
The
pressurized,
induction
air
from
the compressor
then
passes
into ihe cylinders through
the
induction manifold.
2-34