Cessna 172R, Operating Handbook

Page: 491 / 500

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