Communications Flashcards
What are the components that make up the communications system?
- VHF radio
- HF radio
- SATCOM
- Interphone
What other components make up the comm system?
- CVR
- SELCAL
- Crew Alerting System
- Radio Communication System
- Interphone Communication System
- Data Communication System
What primarily controls the communications system?
- Audio control panels (ACP)
- Radio tuning panels
- Comm pages of the CDU
- Comm pages of the MFD
How many transmitters switches on the ACP can be selected at a time?
1
What happens when the crew oxygen mask stowage doors are opened?
Oxygen mask microphone is enabled and the boom microphone is disabled.
How is the boom microphone enabled at the completion of using the oxygen mask?
- Close the left oxygen mask stowage door
- Push the RESET/TEST switch
- Ensure OXY ON flag is out of view
If the CA or FO’s ACP fails how can comms be restored?
The observer ACP can be used as a backup by selecting CAPT or F/O on the OBS AUDIO selector.
The radio communications system consist of?
- VHF radios
- HF radios
- SELCAL
What is different about VHF L from VHF R and VHF C?
VHF L is configured for voice only and can be used on standby battery power.
What happens if VHF or HF radio has a stuck mic for more than 30 seconds?
The EICAS displays a RADIO TRANSMIT advisory message
On the ground with both engines shut down, what happens when any VHF radio is transmitting for more than 35 seconds?
- The radio is automatically disabled
- An intermittent tone can be heard through the audio system for that radio
- Dashes appear on the tuning panel frequency window
What are the four parts to the ICS?
- Flight interphone system
- Service interphone system
- Cabin interphone system
- Passenger address system
Why should the SERV INTPH be set to OFF during flight?
To eliminate residual circuit noise on the cabin interphone.
