How are the communication systems controlled?
By the Audio Control Panel.
What is the purpose of the ALT-NORM switch on the Audio Control Panel?
It selects a degraded mode of operation of the ACP.
The MASK-BOOM switch allows selection of the oxygen mask microphone or the boom microphone. The MASK-BOOM switch does not affect the operation of the hand microphone.
True.
In case of degraded audio system operation:
Audio warnings for altitude alert, GPWS and windshear are not heard.
In case of degraded audio system operation can access the passenger address system through the ACP (Audio Control Panel).
False.
The call system is used as a means for various crewmembers to gain the attention of other crewmembers and to indicate that interphone communication is desired. Attention is gained through the use of lights and aural signals (chimes or horn). If the flight deck calls the cabin crew, the visual signal at called position is:
Pink.
On the Audio Control panel (ACP) the Cabin call light comes ON. It will illuminate until:
remains illuminated for 30 seconds.
The Cockpit Voice Recorder (CVR) can be erased:
Pushing erase button for 2 seconds and aircraft on the ground with parking brake ON.
The Cockpit Voice Recorder in AUTO:
Always powers the CVR from first engine start until 5 minutes after last engine shutdown.
The CVR uses four independent channels to record flight deck audio for maximum of:
120 minutes.
The Cockpit Voice Recorder in ON:
Always powers the CVR from first engine start until 5 minutes, then trips the switch to AUTO.
The CVR (orange box) is located:
In the aft right side of the aft cargo compartment.
When is the Cockpit Voice Recorder is powered?
Anytime 115 VAC is applied to the aircraft.
Which radio does the First Officer use in the degraded mode?
VHF-2.
In the degraded mode of operation, are the ACP transmitter selectors functional?
No.
Audio warnings for altitude alert, GPWS, and windshear are not heard on an audio system operating in the degraded mode.
True.
When the ALT-NORM switch on the Audio Control Panel (ACP) is set to ALT:
The ACP switches to standby ACP and all functions operate normally except PA and interphone.
With the Captain’s ACP operating in degraded mode, at that station:
Altitude alert, GPWS and windshear audio warnings are not heard.
The call system from flight deck to cabin operates:
Pink call lights and a two-tone chime.
Flight Attendants may be called from the flight deck, the other attendant station, or from any passenger seat or lavatory. Master call lights in the passenger cabin identify the source of incoming calls to the attendants.
True.
