Textron Cessna 172R User Manual

SECTION
7
AIRPLANE
&
SYSTEMS DESCRIPTION
CESSNA
MODEL
172R
EXTERNAL
POWER RECEPTACLE
An
external
power
receptacle
is
integral
to
the
power
distribution
module and allows the
use
of
an
external
electrical
power
source
for
cold weather
starting,
and
during lengthy
maintenance
work
on
electrical
and avionics
equipment.
The
receptacle
is located
on
the
I
left
side
of
the
engine cowling,
just
forward
of
the
firewall
and
midway
up
the
side.
Access
to
the
receptacle
is
gained
by
removing
the
cover
plate
(earlier
serial
number
airplanes)
or
opening
the
hinged
access
door
(later
serial
number
airplanes).
The
power
distribution
module
(J-Box)
incorporates
a
circuit
which
will
close the
battery
contactor
when
external
power
is
applied
through
the
ground
service
plug
receptacle
with
the
master
switch
turned
on.
This
feature
is intended
as a
servicing
aid when
battery
power
is
too
low
to
close
the
contactor,
and should
not
be
used
to
avoid
performing
proper
maintenance
procedures
on a
low
battery.
NOTE
•
If
no
avionics
equipment
is
to
be
used
or
serviced,
the avionics
master
switch
should be
in
the
OFF
position.
If
maintenance
is
required
on
the avionics
equipment,
use a
regulated
external
power
source
to
prevent
damage
to
the avionics
equipment
by
transient
voltage.
Do
not
crank
or
start
the
engine
with
the
avionics
master
switch
in
the
ON
position.
•
Before
connecting
an
external
power
source
(generator
type
or
battery
cart),
the avionics
master
switch and the
master
switch should
be
turned
off.
7-36
Revision
8
All manuals and user guides at all-guides.com
all-guides.com

Textron Cessna 172R Specifications

General

Brand	Textron
Model	Cessna 172R
Category	Aircrafts
Language	English