Textron Cessna 172R User Manual

CESSNA
MODEL
172R
SECTION
7
AIRPLANE
&
SYSTEMS
DESCRIPTION
BRAKE
SYSTEM
The
airplane
has
a
single-disc, hydraulically
actuated
brake
on|
each
main
landing
gear
wheel. Each
brake
is
connected,
by
a
hydraulic
line,
to
a
master
cylinder
attached
to
each
of
the
pilot's
rudder
pedals.
The
brakes
are
operated
by applying
pressure
to
the
top
of
either
the
left
(pilot's)
or
right
(copilot's)
set
of
rudder
pedals,
which
are
interconnected.
When
the
airplane
is
parked,
both
main
wheel
brakes
may
be
set
by
utilizing
the
parking
brake
which is
operated
by
a
handle
under the
left
side
of
the instrument
panel.
To
apply
the
parking
brake,
set
the brakes with the rudder
pedals,
pull
the
handle
aft,
and
rotate
it
90°
down.
For maximum
brake
life,
keep
the
brake
system
properly
maintained,
and
minimize
brake
usage
during
taxi
operations
and
landings.
Some
of
the
symptoms
of
impending
brake
failure
are:
gradual
decrease
in
braking
action
after
brake
application,
noisy
or
dragging
brakes,
soft
or
spongy
pedals,
and excessive travel
and weak
braking
action.
If
any
of
these
symptoms
appear,
the brake
system
is
in
need
of
immediate
attention.
If,
during
taxi
or
landing
roll,
braking
action
decreases,
let
up
on
the
pedals
and then
reapply
the
brakes
with
heavy
pressure.
If
the brakes become
spongy
or
pedal
travel
increases,
pumping
the
pedals
should build
braking
pressure.
If
one
brake becomes
weak
or
fails,
use
the other
brake
sparingly
while
using
opposite
rudder,
as
required,
to
offset
the
good
brake.
ELECTRICAL
SYSTEM
The
airplane
is
equipped
with
a
28-volt,
direct
current
electrical
(
system
(Refer
to
Figure
7-7).
The
system
is
powered
by
a
belt-j
driven,
60-amp
alternator and
a
24-volt
battery,
located
on
the
left
forward
side
of
the
firewall.
Power
is
supplied
to
most
general
electrical
circuits
through
a
split
primary
bus
bar,
with
an
essential
bus
wired between
the
two
primaries
to
provide
power
for
the.
master
switch,
annunciator circuits and
interior
lighting.
I
i
f!3*IN
Each
primary
bus
bar is also connected
to
an
avionics
bus bar
via
a
single
avionics
master
switch.
The
primary
buses
are
on|
anytime
the
master
switch
is
turned
on,
and
are
not
affected
by
starter
or
external
power
usage.
The avionics buses
are on
when
the
master
switch
and
avionics
master
switch
are
in
the
ON
position.
Feb
28/00
7-29
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Textron Cessna 172R Specifications

General

Brand	Textron
Model	Cessna 172R
Category	Aircrafts
Language	English