2023 Communications Flashcards
What would be the indication that the Radio Tuning Panel had failed?
PANEL would be displayed in the active frequency window and FAIL would be displayed in the standby frequency window.
On aircraft with a Radio Tuning Panel installed, what would be the indication if the selected radio had failed?
FAIL would be displayed in both the active and standby frequency window.
The three flight deck Audio Control Panels have an NORM/ALT position, what radios are useable in each position with the switch in ALT (Degraded Audio System Operation)?
-CA
VHF-1
-FO
VHF-2
-Observer
VHF-1
What effect does operating in ALT have on the Audio Control Panels (ACP) volume control?
Volume cannot be adjusted and only the usable radio is heard at a preset volume through the headset.
What effect does operating Audio Control Panels (ACP) in ALT have on the associated overhead speaker?
The speaker and speaker switch are not functional at that station.
If operating the Audio Control Panels (ACP) in ALT, can you still use the Flight and Service Interphone?
No.
If operating the Audio Control Panels (ACP) in ALT, how are audio warnings affected?
Audio warnings for altitude alert, GPWS, and wind shear are not heard on an audio system operating in the degraded mode.
Which models have a stuck microphone alarm?
737-800 and MAX
How does the stuck microphone alarm work?
A timer limits VHF transmission to approximately 35 seconds. Approximately 25 to 30 seconds after any PTT is selected, the transceiver makes an aural tone (or side-tone) in the headset. This tone continues for approximately five seconds. When the tone stops, the RF transmission also stops, and the radio is set to receive mode automatically. The radio remains in receive mode until the PTT is released and selected again.
What effect does the PTT switch or MASK-BOOM switch have on the flight deck hand microphones?
None, the MASK-BOOM and/or PTT switches does not affect the operation of the hand microphones.
When using the PTT switch are the overhead speakers muted?
Yes, the two flight compartment speakers are muted for the Captain’s and First Officer’s push-to-talk microphone operation.
When using the mask microphone are the overhead speakers muted?
No, the speakers are not muted for oxygen mask microphone operation.
When STAT MD services are needed what VHF radio should the crew establish communication on?
VHF #2
Which audio control panel is used to allow the Flight Attendant’s to communicate with STAT MD?
Observer’s ACP.
What should be the only selection on the ACP?
-STAT MD with VHF
VHF #2, adjust to full volume for best communication
-STAT MD with SATCOM
SAT #1 or SAT #2, ensure the volume level for the selected transmitter is turned up to a suitable level so that the Flight Attendant is able to hear the transmission.
-Both
Deselect all other audio sources on the Flight Deck Jumpseat Observer’s ACP.
Note: The Flight Deck Crew should not use the ‘hot mic’/FLT interphone transmission feature during STAT MD procedures. “Hot mic” transmissions are audible to STAT MD personnel and Flight Attendants, which may cause confusion.
