Textron Cessna 172R - Page 491

CESSNA
MODEL
172R
SECTION
9
-
SUPPLEMENTS
SUPPLEMENT
20
-
FAA
APPROVED
SECTION
4
NORMAL
PROCEDURES
AUDIO CONTROL
SYSTEM
OPERATION:
1.
MIC
Selector
Switch
--
Turn
to
desired
transmitter.
2.
SPEAKER
and
Audio
Select
Button(s)
--
SELECT
desired
receivers).
NOTES
Rotation
of
the
MIC
selector
switch selects
the
Com
audio
automatically.
MARKER
BEACON RECEIVER
OPERATION:
1.
TEST
Position
-
HOLD
toggle
down
momentarily
to
verify
all
lights
are
operational.
2.
SENS
Selections
--
Select
HI
sensitivity
for
airway
flying
or
LO
for
ILS/LOC
approaches.
The Entertainment
audio
input
(“AUX
AUDIO
IN")
is
unswitched,
so
there is
no
means
of
deselecting
the
entertainment
source
except
by unplugging
the Audio
Input
connector.
In
the
event
of failure
of
the
“Soft
Mute"
function
or
during
periods
of
high
pilot
workload
and/or
heavy
radio
traffic,
it
may
be wise
to
disable
the
Entertainment audio
to
eliminate
a
source
of
distraction
for
the
flight
crew.
NOTE
Use
caution with audio
cables
in
the cabin
to
avoid
entangling
occupants
or
cabin
furnishings
and
to
prevent
damage
to
cables.
Dec
30/00
S20-1
1
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