Textron Cessna 172R - Page 497

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
22
-
FAA
APPROVED
Power
is
supplied
to
the
12-volt
Cabin
Power
System
from
a
DC
to
DC
power
converter
located
in
the
tailcone
of
the
aircraft.
The
power
converter
receives
28
VDC
power
from
the
"CABIN
LTS/PWR"
circuit
breaker located
on
the
electrical
switch/circuit
breaker
panel.
By using
two
small
signal
pins
located
in
the
Cabin
Power
System
connector,
the
power
converter
will
not
supply
power
to
the
Cabin
Power
connector
when there is
nothing
plugged
in.
Refer
to
14
CFR
91.21
and
Advisory
Circular
No.
91.21-1()
“Use
of
Portable Electronic
Devices Aboard
Aircraft” for further
information
and
requirements
regarding
the
use
of
portable
electronic
devices
in
aircraft.
SECTION
2
LIMITATIONS
The
following
limitations
must
be adhered
to:
1.
The
12
Volt
Cabin
Power
System
is
not
certified
for
supplying
power
to
flight-critical
communications
or
navigation
devices.
2.
Use
of
the
12
Volt
Cabin
Power
System
is
prohibited
during
takeoff
and
landing.
3.
Use
of
the
12
Volt
Cabin
Power
System
is
prohibited
under
IFR
unless the
operator
of
the
aircraft
has
determined
that
the
use
of
the
12
VDC
power
supply
and the connected
portable
electronic
device(s)
will
not
cause
interference
with
the
navigation
or
communication
systems
of
the
airplane.
SECTION
3
EMERGENCY
PROCEDURES
There is
no
change
to
the
airplane
emergency
procedures
when
the
12
Volt
Cabin
Power
System
is installed.
The
system
is
disabled
by
unplugging
the
power
or
adapter
cable
from
the
12
Volt
Cabin
Power
System
connector.
In
the
event
of
an
alternator
failure,
load
shedding
of
nonessential
auxiliary
equipment
may
be
accomplished
by simply
unplugging
equipment
from
the
connector.
Dec
30/00
S22-5
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