Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.1
VHF Communication Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.1
Radio Tuning Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.4
HF Communication Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.9
Audio Control Panel (ACP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.10
SELCAL Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.18
ACARS Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.19
Miscellaneous Communication Controls (Typical) . . . . . . . . . . 5.10.22
Glareshield Microphone Switch. . . . . . . . . . . . . . . . . . . . . . . . . 5.10.25
Interphone and Passenger Address Controls . . . . . . . . . . . . . . . 5.10.26
Cockpit Voice Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.27
Cockpit Voice Recorder Switch . . . . . . . . . . . . . . . . . . . . . . 5.10.29
Call System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.10.30
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.1 Audio Systems and Audio Control Panels . . . . . . . . . . . . . . . . . . 5.20.1 Speakers and Headsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.1 Microphones . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.2 Normal Audio System Operation . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.2 Degraded Audio System Operation . . . . . . . . . . . . . . . . . . . . . . . 5.20.3 Flight Interphone System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.4 Service (Attendant) Interphone System . . . . . . . . . . . . . . . . . . . . 5.20.4 Passenger Address System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.5 Call System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.5 VHF Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.7 HF Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.7 Selective Calling (SELCAL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.8
Copyright . The Boeing Company. See title page for details.
Communications -Table of Contents
Cockpit Voice Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.8 ACARS System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.9 ACARS Message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.20.9
Copyright . The Boeing Company. See title page for details.
737 Flight Crew Operations Manual
VHF Communication Panel
YA721 - YA809, YC411, YC413
YC411, YC413
Copyright . The Boeing Company. See title page for details.
June 1, 2005 5.10.1
Communications -Controls and Indicators 737 Flight Crew Operations Manual
YA801 - YA809
VHF Communications Transfer (TFR) Switch YC411, YC413
Left – selects left frequency as active for transceiver. Right – selects right frequency as active for transceiver.
VHF Communications Transfer (TFR) Switch
Push – selects standby frequency as active frequency for transceiver.
Active Frequency Light YC411, YC413
Illuminated (white)– indicates the related frequency is selected.
Frequency Indicator
Indicates selected frequency.
Frequency Indicator YC411, YC413
Indicates selected frequency.
Copyright . The Boeing Company. See title page for details.
5.10.2 June 1, 2005
Communications -Controls and Indicators 737 Flight Crew Operations Manual
Frequency Selector
YA721, YA722
Rotate – selects frequency in related indicator: . outer selector changes three left digits
. inner selector changes two right digits.
Frequency Selector
Rotate – selects frequency in related indicator: . outer selector changes three left digits
. inner selector changes three right digits.
Frequency Selector YC411, YC413
Rotate – selects frequency in related indicator: . outer selector changes three left digits
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