TM 1-1520-238-10
Change 4
3-7
Section II. COMMUNICATIONS
3.5 INTERCOMMUNICATION SYSTEM (ICS)
C-10414(V)3/ARC OR C-11746(V)4/ARC.
Two ICS control panels, placarded CSC (fig 3-2 and 3-3),
one each for pilot and CPG, provide intercommunication
capability between crewmembers. These also provide a
means by which the pilot and CPG may select and control
associated radio equipment for voice transmission and re-
ception. Additionally, an external jack fitting on each ser-
vice panel, located outboard on each wing, permits main-
tenance personnel to communicate with the
crewmembers. A radio transmit/interphone rocker switch
is installed on both cyclic stick grips (fig 2-26). A foot-oper-
ated radio transmit switch is installed on the right side of
the aft cockpit deck. The forward crew station has two
foot-operated switches: a radio transmit switch on the left
side of the deck, and an interphone transmit switch on the
right side. Hands free intercommunication is provided by a
hot mike feature. The remote transmitter switch pushbut-
ton on the pilot cyclic stick grip, directly below the RADIO/
ICS switch, allows the pilot to remotely select the radio
transmitter that he wishes to use. With the transmitter se-
lector switch in position 5 (C-10414 configuration) or posi-
tion RMT (C-11746 configuration), pressing the remote
transmit select switch begins the transmitter select cycle.
Identification of the selected transmitter is displayed by
way of lamps above the pilot CSC panel. A placard is pro-
vided for each crewmember as ready reference to which
receiver and transmitter selector switch position will en-
able a desired radio. Power for the (ICS) is provided from
the emergency dc bus through the ICS circuit breaker in
each crew station.
3.5.1 Controls and Functions.
The function of the
controls on the face of each CSC panel (fig 3-2 or 3-3) are
as shown in table 3-2.
NOTE
The RADIO MON switches are con-
nected (ON) when pushed in fully and
disconnected (OFF) when pulled out.
The C-10414(V)3/ARC control panel is
not illuminated.
EFFECTIVE ON AIRCRAFT SERIAL NUMBER
83-23787 THRU 85-25415
M01-028-1
Figure 3-2.
Control Panel C-10414(V)3/ARC and
Remote Transmitter Selector
EFFECTIVE ON AIRCRAFT SERIAL NUMBER
85-25416 AND SUBSEQUENT
M01-028-2B
VOX
Figure 3-3.
Control Panel C-11746(V)4/ARC and
Remote Transmitter Indicator Panel ID-2403/ARC
