SECTION g':SUPPLEMENTS
. SUPPLEMENT
20 - FAA APPROVED
CESSNA
MODEL 172S
1a.INTERCOM
MODE SELECT (ISO-ALL 'CREW) .. A three.position
mode
switch that allows the pilot to tailor the intercom function to. best meet
the ~urrent cockpit situation.
ISO .. (Up PoSition)
'The pilot is isolated from the intercom and is'
connected
only to the aircraft radio system.
The pilot. will hear the
aircraft radio reception (and. sidetone during radio transmissions).
The
copilot
will
hear
passenger's
intercom
and,
Entertainment,
while
passengers will hear copilot intercom and Entertainment
Neither
will
hear aircraft radio receptions
o~ pilot
transmissions.
'ALL .. (Middle PoSition)
All parties will hear the aircraft radio and
intercom.
Crew
will
hear
Entertainment,
passengers --will
hear
Entertainment.
During
any .radio or intercom
cOmmunications,
the
music volume automatically
decreases.
The music volume increases
gradually
back to the original
level after communications
have been
completed.
-
.
CREW .. (Down' Position)
~i1ot and copilot are connected
on one
intercom
channel ~and have exclusive
access
to the aircraft
radios.
They may also listen
to Entertainment..
Passengers
can continue'
t6
communicate'
among themselves
Without interrupting
the crew and also
may listen .to Entertainment
_Anytime ihe' KMA 28 is in either the COM
1/2 or COM 2/1 'split modes, the pilot and -copilot intercom is controlled
with
the
les
bunon.
The
passengers
will
maintain
intercommunications,
but never hear aircraft radios.
PASSENGER
.
MODE
, PILOT HEARS
COPILOT HEARS
HEARS
COMMENTS
Isolate
AIC Radios Pilot
Copilot and pas-
Passenger and Co-
This mode allows the pilot
Sidetone{during
senger intercom
pilot intercom
to communicate withoulthe
radio transmission)
Entertainment
Entertainment
others bothered by the con-
Entertainment
is
versations. Copilot and pas-
Muted
sengers can continue to
eommuniyate and listen to
inusic.
All
Pilot
Copilot
Passengers
This mode allows al1to hear
Copilot
Pilot
Pilot
radio reception as well as
AlC Radio
AICRadie
Copilot
communicate on the Inter-
Passengers
Passengers
AlC Radie
com. Music and intercom is
Entertainment
Entertainment
Entertainment
muted during intercom and
.
radio communications.
Crew
Pilot
Copilot
Passengers
This mode allows the. pilot
Copilot
Pilot
Entertainment
and cepilollO concentrate
A/CRadio
AIC
Radio
on flying while the passen-
Entertainment
Entertainment
gers can communicate
amongst themselves.
Figure 1. Bendix/King
KMA 28 Audio Selector Panel (Sheet 4 of 5)
S20-8
Dec
30100
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