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several pages of radio system data including channels, frequencies, codes, backup
engine data, strap options, maintenance data log, and software versions.
A cockpit voice recorder (CVR) is installed in the flight compartment, on the copilot’s
side console. All incoming, outgoing and internal communications are recorded on the
cockpit voice recorder. Radio frequency interference is reduced through a series of
electrostatic dischargers and through an equipment bonding/grounding system.
Audio control panels (center pedestal) function as the interface to the remote NAV and
COM units.
DESCRIPTION
INTERPHONE COMMUNICATION
The interphone communication consists of the following internal and external
components:
FLIGHT COMPARTMENT SPEAKERS
Two five-inch speakers, located in the overhead panel, supply audio output for headset
free operation. A speaker volume control is located on each audio panel and can be
selected off by the ST switch on each control panel, unless the oxygen mask mic is in
use.
GX_05_001
NOSEDN
NOSEUP
DISC
MASTER
TCS
MIC
Speakers
Audio Control
Panels
NOSEDN
NOSEUP
DISC
MASTER
TCS
MIC
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-2 For Training Purposes Only
Sept 04
FLIGHT CREW INTERCOM
The flight crew intercom system permits communications between stations within the
airplane, selection and monitoring of audio on the communications and navigation
receivers, and selection for transmission on the communications transceivers. Flight
crew can select and monitor the audio output of one or more communications
transceivers and navigation receivers.
Crew members can key communications transmission as follows:
• Audio control panel – hot mic (H’MIC) and intercom (INT) switch
• RT/IC switch on the back side of each control wheel
Flight compartment microphone and headset jacks are installed at the following
locations:
• Below pilot’s side console
• Below copilot’s side console
GX_05_002
NOSEDN
NOSEUP
DISC
MASTER
TCS
MIC
NOSEDN
NOSEUP
DISC
MASTER
TCS
MIC
HEADSET PANEL
MIC HDPH
HEADSET
For Training Purposes Only
Sept 04
5-3
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
SERVICE INTERCOM PANELS
Service intercom panels are provided throughout the airplane and permit hot
microphone communication between locations, and interface with the flight
compartment when selected on the audio control panel. A headphone and microphone
jack are installed at each location. Hand microphones with a Press-To-Talk (PTT)
switch are attached to the front of each control wheel.
Microphone and headset jacks are installed at the following external airplane
locations:
• Forward and rear external services panel
• Aft equipment bay
• Avionics bay
Forward External Services Panel Interphone Station
Aft External Services Panel Interphone Station
GX_05_003
HDHP MIC
GX_05_004
BATTERY
MASTER
GROUND
SERVICE
EXT AC EXT DC
BATT
ON
ON
AVAIL
IN USE
AVAIL
IN USE
MIC HDPH
LAMP
TEST
APU
SHUT-OFF
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-4 For Training Purposes Only
Sept 04
Aft Equipment Bay Interphone Station
Avionics Bay Interphone Station
GX_05_005 GX_05_006
For Training Purposes Only
Sept 04
5-5
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
CONTROL WHEEL RADIO KEY
Each control wheel has a radio key which activates the selected radio transmitter.
AUDIO CONTROL PANEL
The Audio Control Panel (ACP) operates independently to the remote COMM and
NAV units, and provides on-side/cross-side selection. They also control the audio to
and from the radios, intercom, PA, and aural warning system.
Audio Control Panel Input Schematic
GX_05_007
NOSE
DN
N O SE UP
DISC
MASTER
TCS
MIC
NOTE:
Pilot Control Wheel is shown
IF INSTALLED copilot’s is similar.
(Radio key
located behind)
(Radio key / interphone
toggle switch located
behind)
NOSE
DN
N OS E UP
DISC
MASTER
IC
R/T
GX_05_008
TCAS
GPWS
PA SYSTEM
INTERPHONE AUDIO
(flight/service)
Aural Warning
System
Audio -
optional systems
MICROPHONE AUDIO
(hand, boom and mask
mics.)
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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