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The pilot selects the respective VHF or HF system on the audio panel and when the
Push-To-Talk (PTT) switch is pushed, the EICAS message is canceled.
GX_05_034
“SELCAL, SELCAL”
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-26 For Training Purposes Only
Sept 04
STATIC WICKS
The airplane wings and tail sections contain 24 static wicks installed to discharge static
electricity to reduce radio interference. They are installed at the following locations:
• Winglets (1 per side), wingtips (1 per side), and ailerons (4 per wing)
• Elevators (3 per elevator), rudder (2), vertical stabilizer (1), horizontal stabilizer
(2), and tail cone (1)
There are two parts to each static discharge assembly: the static discharger and the
mounting base. If any are found missing during the walkaround, refer to the
configuration deviation list of the AFM to verify if you can dispatch.
GX_05_035
GX_05_036
For Training Purposes Only
Sept 04
5-27
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
COCKPIT VOICE RECORDER
The Cockpit Voice Recorder (CVR) is a crash-survivable recording device that
simultaneously records four channels of audio data representing the cockpit acoustic
environment. The system consists of a:
• CVR
• Microphone monitor/control panel
• Remote area microphone
• Impact switch
The CVR retains the most recent two hours of recorded information in memory. Input
is received from each audio control panel and CVR area microphone. The CVR also
receives digital data (GMT time) from DAU 4 to synchronize the CVR with the flight
data recorder.
CVR LOCATION
The CVR is mounted in the aft equipment bay. The microphone monitor/control panel
is located in the flight compartment right side panel.
GX_05_037
COCKPIT VOICE RECORDER
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-28 For Training Purposes Only
Sept 04
MICROPHONE MONITOR CONTROL PANEL
Remote Area Microphone
The area microphone is mounted on the overhead panel in the flight compartment.
COCKPIT VOICE RECORDER MICROPHONE MONITOR
ERASE
STATUS
TEST
HEADPHONE
GX_05_038
HEADSET Monitor Jack
Used to monitor tone
transmissions during test
and audio signals currently
being recorded.
ERASE Pushbutton
Pushing the ERASE
pushbutton initiates a
memory erase sequence
within the CVR. Only
enabled when the airplane is
on the ground (WOW), and
the parking brake set.
TEST Pushbutton
Pushing the test button
will activate the CVR
internal self-test.
STATUS Display
Illuminates as a function
of test and/or failure.
OFF OFF
GX_05_039
REMOTE AREA
MICROPHONE
For Training Purposes Only
Sept 04
5-29
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
Impact Switch
The impact switch mounted in the aft avionics bay removes electrical power to the
CVR when the airplane experiences an impact.
Audio Control Panel Input
The audio panels provide audio inputs to the CVR for recording flight crew voice
communications and other flight compartment audio signals.
The various audio signals are summed together in the audio panels to form a single
audio input to the CVR from each audio panel.
Impact Switch
AFT Avionics Bay
GX_05_040
GX_05_041
AUDIO CONTROL PANEL
TRANSMIT EMER
VHF 1
NAV 1
SPEAKER HEADPHONE
NAV 2 ADF DME
ST MKR MUTE H'MIC
INT
VHF 2 HF 1 HF 2 PA
1 21 2
SPKR
ON
SPKR
OFF
MIC MASK
HI
SENS
LO
SENS
VHF 3
BOTH
I
D
V
O
I
C
E
P I LOT T R A I N I N G GU I D E
COMMUNICATIONS
5-30 For Training Purposes Only
Sept 04
CVR SYSTEM SCHEMATIC
GX_05_042
AREA MIC
IMPACT SWITCH
AUDIO PANEL 3
(Option)
AUDIO PANEL 1
AUDIO PANEL 2
DAU 4 (GMT)
COCKPIT VOICE RECORDER MICROPHONE MONITOR
ERASE
STATUS
TEST
HEADPHONE
TRANSMIT EMER
VHF 1
NAV 1
SPEAKER HEADPHONE
NAV 2 ADF DME
ST MKR MUTE H'MIC
INT
VHF 2 HF 1 HF 2 PA
1 21 2
SPKR
ON
SPKR
OFF
MIC MASK
HI
SENS
LO
SENS
VHF 3
BOTH
I
D
V
O
I
C
E
TRANSMIT EMER
VHF 1
NAV 1
SPEAKER HEADPHONE
NAV 2 ADF DME
ST MKR MUTE H'MIC
INT
VHF 2 HF 1 HF 2 PA
1 21 2
SPKR
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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